diff options
author | Olivier Cochard <olivier@FreeBSD.org> | 2022-07-22 02:42:11 +0200 |
---|---|---|
committer | Olivier Cochard <olivier@FreeBSD.org> | 2022-07-22 02:44:20 +0200 |
commit | 0c4ac5e1b2ee5c25a44b190566345b61e3ae9791 (patch) | |
tree | 189924fd85edd8b7bce915b0ca9decff88b96075 /graphics | |
parent | x11-fonts/iosevka: Update to 15.6.0 (diff) |
graphics/openfx-arena: Update to 2.4.3 and fix build
PR: 265166
Reported by: pkg-fallout
Diffstat (limited to 'graphics')
-rw-r--r-- | graphics/openfx-arena/Makefile | 27 | ||||
-rw-r--r-- | graphics/openfx-arena/distinfo | 30 | ||||
-rw-r--r-- | graphics/openfx-arena/files/patch-Bundle_Makefile | 18 | ||||
-rw-r--r-- | graphics/openfx-arena/files/patch-Bundle_lodepng.cpp | 6226 | ||||
-rw-r--r-- | graphics/openfx-arena/files/patch-Bundle_lodepng.h | 1762 | ||||
-rw-r--r-- | graphics/openfx-arena/files/patch-Extra_ReadPDF.cpp | 13 | ||||
-rw-r--r-- | graphics/openfx-arena/files/patch-Makefile.master | 10 | ||||
-rw-r--r-- | graphics/openfx-arena/pkg-plist | 2 |
8 files changed, 29 insertions, 8059 deletions
diff --git a/graphics/openfx-arena/Makefile b/graphics/openfx-arena/Makefile index db857e90e129..a1d27d47d088 100644 --- a/graphics/openfx-arena/Makefile +++ b/graphics/openfx-arena/Makefile @@ -1,23 +1,18 @@ PORTNAME= openfx-arena -PORTVERSION= 2.3.14 +PORTVERSION= 2.4.3 DISTVERSIONPREFIX= Natron- -PORTREVISION= 56 CATEGORIES= graphics -PATCH_SITES= https://github.com/${GH_ACCOUNT}/${GH_PROJECT}/commit/ -PATCHFILES= bc06a46bb1ccef8f7da6caf17faf165fbac662db.diff:-p1 - MAINTAINER= olivier@FreeBSD.org COMMENT= Extra OpenFX plugins for Natron LICENSE= GPLv2 -BROKEN= does not build: error: no member named 'apply' in 'OpenColorIO_v2_1::Processor' - ONLY_FOR_ARCHS= amd64 powerpc64 powerpc64le BUILD_DEPENDS= opencl>=0:devel/opencl LIB_DEPENDS= libOpenColorIO.so:graphics/opencolorio \ libfontconfig.so:x11-fonts/fontconfig \ + libfribidi.so:converters/fribidi \ libcdr-0.1.so:graphics/libcdr01 \ librevenge-0.0.so:textproc/librevenge \ libpoppler-glib.so:graphics/poppler-glib \ @@ -35,21 +30,23 @@ LIB_DEPENDS= libOpenColorIO.so:graphics/opencolorio \ liblqr-1.so:graphics/liblqr-1 \ libfftw3.so:math/fftw3 \ libltdl.so:devel/libltdl \ - libpoppler.so:graphics/poppler + libpoppler.so:graphics/poppler \ + libraqm.so:print/libraqm -USES= gl gmake gnome iconv magick:6 xorg +USES= gl gmake gnome iconv magick:6 ssl xorg USE_GITHUB= yes GH_ACCOUNT= NatronGitHub -GH_TUPLE= NatronGitHub:openfx-supportext:e600cae:openfx_supportext/SupportExt \ - NatronGitHub:openfx:a85dc34:openfx/OpenFX \ - NatronGitHub:openfx-io:Natron-2.3.12:OpenFX_IO/OpenFX-IO \ - NatronGitHub:SequenceParsing:9e8b77a:SequenceParsing/OpenFX-IO/IOSupport/SequenceParsing \ - NatronGitHub:tinydir:3aae922:tinydir/OpenFX-IO/IOSupport/SequenceParsing/tinydir +GH_TUPLE= NatronGitHub:openfx-supportext:79d8c22:openfx_supportext/SupportExt \ + NatronGitHub:openfx:d5db5d0:openfx/OpenFX \ + NatronGitHub:openfx-io:c6ad47b:OpenFX_IO/OpenFX-IO \ + lvandeve:lodepng:5601b82:dummy/lodepng \ + NatronGitHub:SequenceParsing:3c93fcc:SequenceParsing/OpenFX-IO/IOSupport/SequenceParsing \ + NatronGitHub:tinydir:64fb1d4:tinydir/OpenFX-IO/IOSupport/SequenceParsing/tinydir MAKE_ENV+= CONFIG=release USE_GL= gl USE_GNOME= libxml2 pango cairo librsvg2 -USE_XORG+= x11 xcb xau xdamage xfixes xxf86vm xrender xext xdmcp pixman sm ice xt +USE_XORG+= x11 xcb xau xdamage xfixes xft xxf86vm xrender xext xdmcp pixman sm ice xt MAKE_ENV+= CONFIG=release post-extract: diff --git a/graphics/openfx-arena/distinfo b/graphics/openfx-arena/distinfo index 9cca9d7901b1..a372b2efa330 100644 --- a/graphics/openfx-arena/distinfo +++ b/graphics/openfx-arena/distinfo @@ -1,15 +1,15 @@ -TIMESTAMP = 1533473532 -SHA256 (NatronGitHub-openfx-arena-Natron-2.3.14_GH0.tar.gz) = 7fd6f987cce774578498d9c649989f1357baf0e6a828352fb72790f1a1373f90 -SIZE (NatronGitHub-openfx-arena-Natron-2.3.14_GH0.tar.gz) = 566620 -SHA256 (NatronGitHub-openfx-supportext-e600cae_GH0.tar.gz) = b6fbe4552d0986a4913ab4e6a999bd30b432646495b2b431d2e295b1ed6514cf -SIZE (NatronGitHub-openfx-supportext-e600cae_GH0.tar.gz) = 287231 -SHA256 (NatronGitHub-openfx-a85dc34_GH0.tar.gz) = c59082fcd9327e87ff544e93179ddc5b81d39442854283064480526ab153bfde -SIZE (NatronGitHub-openfx-a85dc34_GH0.tar.gz) = 10651841 -SHA256 (NatronGitHub-openfx-io-Natron-2.3.12_GH0.tar.gz) = 3fcd8b570026113286c516ca5b0590b93338ca124bfccc7e4341a5ee9defa442 -SIZE (NatronGitHub-openfx-io-Natron-2.3.12_GH0.tar.gz) = 468698 -SHA256 (NatronGitHub-SequenceParsing-9e8b77a_GH0.tar.gz) = 7a2c1591b3198f8780bf2b791494da0d9bbd74d073653baa295ff30bf00c16fe -SIZE (NatronGitHub-SequenceParsing-9e8b77a_GH0.tar.gz) = 15980 -SHA256 (NatronGitHub-tinydir-3aae922_GH0.tar.gz) = eb816fff00d9713742a1f1367432fee0ea73ccb0f458c90035543e923e8e55d1 -SIZE (NatronGitHub-tinydir-3aae922_GH0.tar.gz) = 24552 -SHA256 (bc06a46bb1ccef8f7da6caf17faf165fbac662db.diff) = 3b91e4cdfa5c29000d15fa5a485f648386fcc72aa36bc3d44e759c6cabe5ab88 -SIZE (bc06a46bb1ccef8f7da6caf17faf165fbac662db.diff) = 7313 +TIMESTAMP = 1658449942 +SHA256 (NatronGitHub-openfx-arena-Natron-2.4.3_GH0.tar.gz) = e3835a1fdc2f617fd3d0ed225fe6a80a8ff2fec636e94be55d72cafe80ca610f +SIZE (NatronGitHub-openfx-arena-Natron-2.4.3_GH0.tar.gz) = 617742 +SHA256 (NatronGitHub-openfx-supportext-79d8c22_GH0.tar.gz) = fa4a1565a46f536540df650d31d8ebb862703043e6386d12bf9a4c500f998d43 +SIZE (NatronGitHub-openfx-supportext-79d8c22_GH0.tar.gz) = 295608 +SHA256 (NatronGitHub-openfx-d5db5d0_GH0.tar.gz) = 7d626b85a7731c8ee4175f7cd7c7c9dd3c7c77523c3c49c19d8090d39fd28161 +SIZE (NatronGitHub-openfx-d5db5d0_GH0.tar.gz) = 10706209 +SHA256 (NatronGitHub-openfx-io-c6ad47b_GH0.tar.gz) = 20ddd9a367371bcbc4f7122712a5724cee89e851099e29215d124be8e6e198e7 +SIZE (NatronGitHub-openfx-io-c6ad47b_GH0.tar.gz) = 481035 +SHA256 (lvandeve-lodepng-5601b82_GH0.tar.gz) = 3ac3a5e5119456ff2bf214336790e69d555f5034a8794cbc77b0801b2b1913fd +SIZE (lvandeve-lodepng-5601b82_GH0.tar.gz) = 241633 +SHA256 (NatronGitHub-SequenceParsing-3c93fcc_GH0.tar.gz) = 143112f7f59a2edccd63bb8354536f47f77b283d2eda5d2123e058ed8ccd6224 +SIZE (NatronGitHub-SequenceParsing-3c93fcc_GH0.tar.gz) = 16032 +SHA256 (NatronGitHub-tinydir-64fb1d4_GH0.tar.gz) = 728f9948b59131b650bc2c53b8dcb1db8c49ef07c27d0aca3a13b666ae6b2c59 +SIZE (NatronGitHub-tinydir-64fb1d4_GH0.tar.gz) = 24782 diff --git a/graphics/openfx-arena/files/patch-Bundle_Makefile b/graphics/openfx-arena/files/patch-Bundle_Makefile deleted file mode 100644 index 7a71ae197661..000000000000 --- a/graphics/openfx-arena/files/patch-Bundle_Makefile +++ /dev/null @@ -1,18 +0,0 @@ ---- Bundle/Makefile.orig 2017-01-03 14:53:38 UTC -+++ Bundle/Makefile -@@ -168,11 +168,11 @@ endif - - PNGVERSION = a70c086077c0eaecbae3845e4da4424de5f43361 - --lodepng.cpp: -- curl -o $@ https://raw.githubusercontent.com/lvandeve/lodepng/$(PNGVERSION)/lodepng.cpp -+#lodepng.cpp: -+ #curl -o $@ https://raw.githubusercontent.com/lvandeve/lodepng/$(PNGVERSION)/lodepng.cpp - --lodepng.h: -- curl -o $@ https://raw.githubusercontent.com/lvandeve/lodepng/$(PNGVERSION)/lodepng.h -+#lodepng.h: -+ #curl -o $@ https://raw.githubusercontent.com/lvandeve/lodepng/$(PNGVERSION)/lodepng.h - - $(OBJECTPATH)/lodepng.o: lodepng.cpp lodepng.h - $(OBJECTPATH)/ReadKrita.o: ReadKrita.cpp lodepng.h diff --git a/graphics/openfx-arena/files/patch-Bundle_lodepng.cpp b/graphics/openfx-arena/files/patch-Bundle_lodepng.cpp deleted file mode 100644 index 197f1b738811..000000000000 --- a/graphics/openfx-arena/files/patch-Bundle_lodepng.cpp +++ /dev/null @@ -1,6226 +0,0 @@ ---- Bundle/lodepng.cpp.orig 2017-10-04 17:18:33 UTC -+++ Bundle/lodepng.cpp -@@ -0,0 +1,6223 @@ -+/* -+LodePNG version 20160418 -+ -+Copyright (c) 2005-2016 Lode Vandevenne -+ -+This software is provided 'as-is', without any express or implied -+warranty. In no event will the authors be held liable for any damages -+arising from the use of this software. -+ -+Permission is granted to anyone to use this software for any purpose, -+including commercial applications, and to alter it and redistribute it -+freely, subject to the following restrictions: -+ -+ 1. The origin of this software must not be misrepresented; you must not -+ claim that you wrote the original software. If you use this software -+ in a product, an acknowledgment in the product documentation would be -+ appreciated but is not required. -+ -+ 2. Altered source versions must be plainly marked as such, and must not be -+ misrepresented as being the original software. -+ -+ 3. This notice may not be removed or altered from any source -+ distribution. -+*/ -+ -+/* -+The manual and changelog are in the header file "lodepng.h" -+Rename this file to lodepng.cpp to use it for C++, or to lodepng.c to use it for C. -+*/ -+ -+#include "lodepng.h" -+ -+#include <limits.h> -+#include <stdio.h> -+#include <stdlib.h> -+ -+#if defined(_MSC_VER) && (_MSC_VER >= 1310) /*Visual Studio: A few warning types are not desired here.*/ -+#pragma warning( disable : 4244 ) /*implicit conversions: not warned by gcc -Wall -Wextra and requires too much casts*/ -+#pragma warning( disable : 4996 ) /*VS does not like fopen, but fopen_s is not standard C so unusable here*/ -+#endif /*_MSC_VER */ -+ -+const char* LODEPNG_VERSION_STRING = "20160418"; -+ -+/* -+This source file is built up in the following large parts. The code sections -+with the "LODEPNG_COMPILE_" #defines divide this up further in an intermixed way. -+-Tools for C and common code for PNG and Zlib -+-C Code for Zlib (huffman, deflate, ...) -+-C Code for PNG (file format chunks, adam7, PNG filters, color conversions, ...) -+-The C++ wrapper around all of the above -+*/ -+ -+/*The malloc, realloc and free functions defined here with "lodepng_" in front -+of the name, so that you can easily change them to others related to your -+platform if needed. Everything else in the code calls these. Pass -+-DLODEPNG_NO_COMPILE_ALLOCATORS to the compiler, or comment out -+#define LODEPNG_COMPILE_ALLOCATORS in the header, to disable the ones here and -+define them in your own project's source files without needing to change -+lodepng source code. Don't forget to remove "static" if you copypaste them -+from here.*/ -+ -+#ifdef LODEPNG_COMPILE_ALLOCATORS -+static void* lodepng_malloc(size_t size) -+{ -+ return malloc(size); -+} -+ -+static void* lodepng_realloc(void* ptr, size_t new_size) -+{ -+ return realloc(ptr, new_size); -+} -+ -+static void lodepng_free(void* ptr) -+{ -+ free(ptr); -+} -+#else /*LODEPNG_COMPILE_ALLOCATORS*/ -+void* lodepng_malloc(size_t size); -+void* lodepng_realloc(void* ptr, size_t new_size); -+void lodepng_free(void* ptr); -+#endif /*LODEPNG_COMPILE_ALLOCATORS*/ -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* // Tools for C, and common code for PNG and Zlib. // */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+/* -+Often in case of an error a value is assigned to a variable and then it breaks -+out of a loop (to go to the cleanup phase of a function). This macro does that. -+It makes the error handling code shorter and more readable. -+ -+Example: if(!uivector_resizev(&frequencies_ll, 286, 0)) ERROR_BREAK(83); -+*/ -+#define CERROR_BREAK(errorvar, code)\ -+{\ -+ errorvar = code;\ -+ break;\ -+} -+ -+/*version of CERROR_BREAK that assumes the common case where the error variable is named "error"*/ -+#define ERROR_BREAK(code) CERROR_BREAK(error, code) -+ -+/*Set error var to the error code, and return it.*/ -+#define CERROR_RETURN_ERROR(errorvar, code)\ -+{\ -+ errorvar = code;\ -+ return code;\ -+} -+ -+/*Try the code, if it returns error, also return the error.*/ -+#define CERROR_TRY_RETURN(call)\ -+{\ -+ unsigned error = call;\ -+ if(error) return error;\ -+} -+ -+/*Set error var to the error code, and return from the void function.*/ -+#define CERROR_RETURN(errorvar, code)\ -+{\ -+ errorvar = code;\ -+ return;\ -+} -+ -+/* -+About uivector, ucvector and string: -+-All of them wrap dynamic arrays or text strings in a similar way. -+-LodePNG was originally written in C++. The vectors replace the std::vectors that were used in the C++ version. -+-The string tools are made to avoid problems with compilers that declare things like strncat as deprecated. -+-They're not used in the interface, only internally in this file as static functions. -+-As with many other structs in this file, the init and cleanup functions serve as ctor and dtor. -+*/ -+ -+#ifdef LODEPNG_COMPILE_ZLIB -+/*dynamic vector of unsigned ints*/ -+typedef struct uivector -+{ -+ unsigned* data; -+ size_t size; /*size in number of unsigned longs*/ -+ size_t allocsize; /*allocated size in bytes*/ -+} uivector; -+ -+static void uivector_cleanup(void* p) -+{ -+ ((uivector*)p)->size = ((uivector*)p)->allocsize = 0; -+ lodepng_free(((uivector*)p)->data); -+ ((uivector*)p)->data = NULL; -+} -+ -+/*returns 1 if success, 0 if failure ==> nothing done*/ -+static unsigned uivector_reserve(uivector* p, size_t allocsize) -+{ -+ if(allocsize > p->allocsize) -+ { -+ size_t newsize = (allocsize > p->allocsize * 2) ? allocsize : (allocsize * 3 / 2); -+ void* data = lodepng_realloc(p->data, newsize); -+ if(data) -+ { -+ p->allocsize = newsize; -+ p->data = (unsigned*)data; -+ } -+ else return 0; /*error: not enough memory*/ -+ } -+ return 1; -+} -+ -+/*returns 1 if success, 0 if failure ==> nothing done*/ -+static unsigned uivector_resize(uivector* p, size_t size) -+{ -+ if(!uivector_reserve(p, size * sizeof(unsigned))) return 0; -+ p->size = size; -+ return 1; /*success*/ -+} -+ -+/*resize and give all new elements the value*/ -+static unsigned uivector_resizev(uivector* p, size_t size, unsigned value) -+{ -+ size_t oldsize = p->size, i; -+ if(!uivector_resize(p, size)) return 0; -+ for(i = oldsize; i < size; ++i) p->data[i] = value; -+ return 1; -+} -+ -+static void uivector_init(uivector* p) -+{ -+ p->data = NULL; -+ p->size = p->allocsize = 0; -+} -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+/*returns 1 if success, 0 if failure ==> nothing done*/ -+static unsigned uivector_push_back(uivector* p, unsigned c) -+{ -+ if(!uivector_resize(p, p->size + 1)) return 0; -+ p->data[p->size - 1] = c; -+ return 1; -+} -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+#endif /*LODEPNG_COMPILE_ZLIB*/ -+ -+/* /////////////////////////////////////////////////////////////////////////// */ -+ -+/*dynamic vector of unsigned chars*/ -+typedef struct ucvector -+{ -+ unsigned char* data; -+ size_t size; /*used size*/ -+ size_t allocsize; /*allocated size*/ -+} ucvector; -+ -+/*returns 1 if success, 0 if failure ==> nothing done*/ -+static unsigned ucvector_reserve(ucvector* p, size_t allocsize) -+{ -+ if(allocsize > p->allocsize) -+ { -+ size_t newsize = (allocsize > p->allocsize * 2) ? allocsize : (allocsize * 3 / 2); -+ void* data = lodepng_realloc(p->data, newsize); -+ if(data) -+ { -+ p->allocsize = newsize; -+ p->data = (unsigned char*)data; -+ } -+ else return 0; /*error: not enough memory*/ -+ } -+ return 1; -+} -+ -+/*returns 1 if success, 0 if failure ==> nothing done*/ -+static unsigned ucvector_resize(ucvector* p, size_t size) -+{ -+ if(!ucvector_reserve(p, size * sizeof(unsigned char))) return 0; -+ p->size = size; -+ return 1; /*success*/ -+} -+ -+#ifdef LODEPNG_COMPILE_PNG -+ -+static void ucvector_cleanup(void* p) -+{ -+ ((ucvector*)p)->size = ((ucvector*)p)->allocsize = 0; -+ lodepng_free(((ucvector*)p)->data); -+ ((ucvector*)p)->data = NULL; -+} -+ -+static void ucvector_init(ucvector* p) -+{ -+ p->data = NULL; -+ p->size = p->allocsize = 0; -+} -+#endif /*LODEPNG_COMPILE_PNG*/ -+ -+#ifdef LODEPNG_COMPILE_ZLIB -+/*you can both convert from vector to buffer&size and vica versa. If you use -+init_buffer to take over a buffer and size, it is not needed to use cleanup*/ -+static void ucvector_init_buffer(ucvector* p, unsigned char* buffer, size_t size) -+{ -+ p->data = buffer; -+ p->allocsize = p->size = size; -+} -+#endif /*LODEPNG_COMPILE_ZLIB*/ -+ -+#if (defined(LODEPNG_COMPILE_PNG) && defined(LODEPNG_COMPILE_ANCILLARY_CHUNKS)) || defined(LODEPNG_COMPILE_ENCODER) -+/*returns 1 if success, 0 if failure ==> nothing done*/ -+static unsigned ucvector_push_back(ucvector* p, unsigned char c) -+{ -+ if(!ucvector_resize(p, p->size + 1)) return 0; -+ p->data[p->size - 1] = c; -+ return 1; -+} -+#endif /*defined(LODEPNG_COMPILE_PNG) || defined(LODEPNG_COMPILE_ENCODER)*/ -+ -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+#ifdef LODEPNG_COMPILE_PNG -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+/*returns 1 if success, 0 if failure ==> nothing done*/ -+static unsigned string_resize(char** out, size_t size) -+{ -+ char* data = (char*)lodepng_realloc(*out, size + 1); -+ if(data) -+ { -+ data[size] = 0; /*null termination char*/ -+ *out = data; -+ } -+ return data != 0; -+} -+ -+/*init a {char*, size_t} pair for use as string*/ -+static void string_init(char** out) -+{ -+ *out = NULL; -+ string_resize(out, 0); -+} -+ -+/*free the above pair again*/ -+static void string_cleanup(char** out) -+{ -+ lodepng_free(*out); -+ *out = NULL; -+} -+ -+static void string_set(char** out, const char* in) -+{ -+ size_t insize = strlen(in), i; -+ if(string_resize(out, insize)) -+ { -+ for(i = 0; i != insize; ++i) -+ { -+ (*out)[i] = in[i]; -+ } -+ } -+} -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+#endif /*LODEPNG_COMPILE_PNG*/ -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+unsigned lodepng_read32bitInt(const unsigned char* buffer) -+{ -+ return (unsigned)((buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3]); -+} -+ -+#if defined(LODEPNG_COMPILE_PNG) || defined(LODEPNG_COMPILE_ENCODER) -+/*buffer must have at least 4 allocated bytes available*/ -+static void lodepng_set32bitInt(unsigned char* buffer, unsigned value) -+{ -+ buffer[0] = (unsigned char)((value >> 24) & 0xff); -+ buffer[1] = (unsigned char)((value >> 16) & 0xff); -+ buffer[2] = (unsigned char)((value >> 8) & 0xff); -+ buffer[3] = (unsigned char)((value ) & 0xff); -+} -+#endif /*defined(LODEPNG_COMPILE_PNG) || defined(LODEPNG_COMPILE_ENCODER)*/ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+static void lodepng_add32bitInt(ucvector* buffer, unsigned value) -+{ -+ ucvector_resize(buffer, buffer->size + 4); /*todo: give error if resize failed*/ -+ lodepng_set32bitInt(&buffer->data[buffer->size - 4], value); -+} -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* / File IO / */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+#ifdef LODEPNG_COMPILE_DISK -+ -+/* returns negative value on error. This should be pure C compatible, so no fstat. */ -+static long lodepng_filesize(const char* filename) -+{ -+ FILE* file; -+ long size; -+ file = fopen(filename, "rb"); -+ if(!file) return -1; -+ -+ if(fseek(file, 0, SEEK_END) != 0) -+ { -+ fclose(file); -+ return -1; -+ } -+ -+ size = ftell(file); -+ /* It may give LONG_MAX as directory size, this is invalid for us. */ -+ if(size == LONG_MAX) size = -1; -+ -+ fclose(file); -+ return size; -+} -+ -+/* load file into buffer that already has the correct allocated size. Returns error code.*/ -+static unsigned lodepng_buffer_file(unsigned char* out, size_t size, const char* filename) -+{ -+ FILE* file; -+ size_t readsize; -+ file = fopen(filename, "rb"); -+ if(!file) return 78; -+ -+ readsize = fread(out, 1, size, file); -+ fclose(file); -+ -+ if (readsize != size) return 78; -+ return 0; -+} -+ -+unsigned lodepng_load_file(unsigned char** out, size_t* outsize, const char* filename) -+{ -+ long size = lodepng_filesize(filename); -+ if (size < 0) return 78; -+ *outsize = (size_t)size; -+ -+ *out = (unsigned char*)lodepng_malloc((size_t)size); -+ if(!(*out) && size > 0) return 83; /*the above malloc failed*/ -+ -+ return lodepng_buffer_file(*out, (size_t)size, filename); -+} -+ -+/*write given buffer to the file, overwriting the file, it doesn't append to it.*/ -+unsigned lodepng_save_file(const unsigned char* buffer, size_t buffersize, const char* filename) -+{ -+ FILE* file; -+ file = fopen(filename, "wb" ); -+ if(!file) return 79; -+ fwrite((char*)buffer , 1 , buffersize, file); -+ fclose(file); -+ return 0; -+} -+ -+#endif /*LODEPNG_COMPILE_DISK*/ -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* // End of common code and tools. Begin of Zlib related code. // */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+#ifdef LODEPNG_COMPILE_ZLIB -+#ifdef LODEPNG_COMPILE_ENCODER -+/*TODO: this ignores potential out of memory errors*/ -+#define addBitToStream(/*size_t**/ bitpointer, /*ucvector**/ bitstream, /*unsigned char*/ bit)\ -+{\ -+ /*add a new byte at the end*/\ -+ if(((*bitpointer) & 7) == 0) ucvector_push_back(bitstream, (unsigned char)0);\ -+ /*earlier bit of huffman code is in a lesser significant bit of an earlier byte*/\ -+ (bitstream->data[bitstream->size - 1]) |= (bit << ((*bitpointer) & 0x7));\ -+ ++(*bitpointer);\ -+} -+ -+static void addBitsToStream(size_t* bitpointer, ucvector* bitstream, unsigned value, size_t nbits) -+{ -+ size_t i; -+ for(i = 0; i != nbits; ++i) addBitToStream(bitpointer, bitstream, (unsigned char)((value >> i) & 1)); -+} -+ -+static void addBitsToStreamReversed(size_t* bitpointer, ucvector* bitstream, unsigned value, size_t nbits) -+{ -+ size_t i; -+ for(i = 0; i != nbits; ++i) addBitToStream(bitpointer, bitstream, (unsigned char)((value >> (nbits - 1 - i)) & 1)); -+} -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ -+#ifdef LODEPNG_COMPILE_DECODER -+ -+#define READBIT(bitpointer, bitstream) ((bitstream[bitpointer >> 3] >> (bitpointer & 0x7)) & (unsigned char)1) -+ -+static unsigned char readBitFromStream(size_t* bitpointer, const unsigned char* bitstream) -+{ -+ unsigned char result = (unsigned char)(READBIT(*bitpointer, bitstream)); -+ ++(*bitpointer); -+ return result; -+} -+ -+static unsigned readBitsFromStream(size_t* bitpointer, const unsigned char* bitstream, size_t nbits) -+{ -+ unsigned result = 0, i; -+ for(i = 0; i != nbits; ++i) -+ { -+ result += ((unsigned)READBIT(*bitpointer, bitstream)) << i; -+ ++(*bitpointer); -+ } -+ return result; -+} -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* / Deflate - Huffman / */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+#define FIRST_LENGTH_CODE_INDEX 257 -+#define LAST_LENGTH_CODE_INDEX 285 -+/*256 literals, the end code, some length codes, and 2 unused codes*/ -+#define NUM_DEFLATE_CODE_SYMBOLS 288 -+/*the distance codes have their own symbols, 30 used, 2 unused*/ -+#define NUM_DISTANCE_SYMBOLS 32 -+/*the code length codes. 0-15: code lengths, 16: copy previous 3-6 times, 17: 3-10 zeros, 18: 11-138 zeros*/ -+#define NUM_CODE_LENGTH_CODES 19 -+ -+/*the base lengths represented by codes 257-285*/ -+static const unsigned LENGTHBASE[29] -+ = {3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, 59, -+ 67, 83, 99, 115, 131, 163, 195, 227, 258}; -+ -+/*the extra bits used by codes 257-285 (added to base length)*/ -+static const unsigned LENGTHEXTRA[29] -+ = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, -+ 4, 4, 4, 4, 5, 5, 5, 5, 0}; -+ -+/*the base backwards distances (the bits of distance codes appear after length codes and use their own huffman tree)*/ -+static const unsigned DISTANCEBASE[30] -+ = {1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, -+ 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577}; -+ -+/*the extra bits of backwards distances (added to base)*/ -+static const unsigned DISTANCEEXTRA[30] -+ = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, -+ 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13}; -+ -+/*the order in which "code length alphabet code lengths" are stored, out of this -+the huffman tree of the dynamic huffman tree lengths is generated*/ -+static const unsigned CLCL_ORDER[NUM_CODE_LENGTH_CODES] -+ = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}; -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+/* -+Huffman tree struct, containing multiple representations of the tree -+*/ -+typedef struct HuffmanTree -+{ -+ unsigned* tree2d; -+ unsigned* tree1d; -+ unsigned* lengths; /*the lengths of the codes of the 1d-tree*/ -+ unsigned maxbitlen; /*maximum number of bits a single code can get*/ -+ unsigned numcodes; /*number of symbols in the alphabet = number of codes*/ -+} HuffmanTree; -+ -+/*function used for debug purposes to draw the tree in ascii art with C++*/ -+/* -+static void HuffmanTree_draw(HuffmanTree* tree) -+{ -+ std::cout << "tree. length: " << tree->numcodes << " maxbitlen: " << tree->maxbitlen << std::endl; -+ for(size_t i = 0; i != tree->tree1d.size; ++i) -+ { -+ if(tree->lengths.data[i]) -+ std::cout << i << " " << tree->tree1d.data[i] << " " << tree->lengths.data[i] << std::endl; -+ } -+ std::cout << std::endl; -+}*/ -+ -+static void HuffmanTree_init(HuffmanTree* tree) -+{ -+ tree->tree2d = 0; -+ tree->tree1d = 0; -+ tree->lengths = 0; -+} -+ -+static void HuffmanTree_cleanup(HuffmanTree* tree) -+{ -+ lodepng_free(tree->tree2d); -+ lodepng_free(tree->tree1d); -+ lodepng_free(tree->lengths); -+} -+ -+/*the tree representation used by the decoder. return value is error*/ -+static unsigned HuffmanTree_make2DTree(HuffmanTree* tree) -+{ -+ unsigned nodefilled = 0; /*up to which node it is filled*/ -+ unsigned treepos = 0; /*position in the tree (1 of the numcodes columns)*/ -+ unsigned n, i; -+ -+ tree->tree2d = (unsigned*)lodepng_malloc(tree->numcodes * 2 * sizeof(unsigned)); -+ if(!tree->tree2d) return 83; /*alloc fail*/ -+ -+ /* -+ convert tree1d[] to tree2d[][]. In the 2D array, a value of 32767 means -+ uninited, a value >= numcodes is an address to another bit, a value < numcodes -+ is a code. The 2 rows are the 2 possible bit values (0 or 1), there are as -+ many columns as codes - 1. -+ A good huffman tree has N * 2 - 1 nodes, of which N - 1 are internal nodes. -+ Here, the internal nodes are stored (what their 0 and 1 option point to). -+ There is only memory for such good tree currently, if there are more nodes -+ (due to too long length codes), error 55 will happen -+ */ -+ for(n = 0; n < tree->numcodes * 2; ++n) -+ { -+ tree->tree2d[n] = 32767; /*32767 here means the tree2d isn't filled there yet*/ -+ } -+ -+ for(n = 0; n < tree->numcodes; ++n) /*the codes*/ -+ { -+ for(i = 0; i != tree->lengths[n]; ++i) /*the bits for this code*/ -+ { -+ unsigned char bit = (unsigned char)((tree->tree1d[n] >> (tree->lengths[n] - i - 1)) & 1); -+ /*oversubscribed, see comment in lodepng_error_text*/ -+ if(treepos > 2147483647 || treepos + 2 > tree->numcodes) return 55; -+ if(tree->tree2d[2 * treepos + bit] == 32767) /*not yet filled in*/ -+ { -+ if(i + 1 == tree->lengths[n]) /*last bit*/ -+ { -+ tree->tree2d[2 * treepos + bit] = n; /*put the current code in it*/ -+ treepos = 0; -+ } -+ else -+ { -+ /*put address of the next step in here, first that address has to be found of course -+ (it's just nodefilled + 1)...*/ -+ ++nodefilled; -+ /*addresses encoded with numcodes added to it*/ -+ tree->tree2d[2 * treepos + bit] = nodefilled + tree->numcodes; -+ treepos = nodefilled; -+ } -+ } -+ else treepos = tree->tree2d[2 * treepos + bit] - tree->numcodes; -+ } -+ } -+ -+ for(n = 0; n < tree->numcodes * 2; ++n) -+ { -+ if(tree->tree2d[n] == 32767) tree->tree2d[n] = 0; /*remove possible remaining 32767's*/ -+ } -+ -+ return 0; -+} -+ -+/* -+Second step for the ...makeFromLengths and ...makeFromFrequencies functions. -+numcodes, lengths and maxbitlen must already be filled in correctly. return -+value is error. -+*/ -+static unsigned HuffmanTree_makeFromLengths2(HuffmanTree* tree) -+{ -+ uivector blcount; -+ uivector nextcode; -+ unsigned error = 0; -+ unsigned bits, n; -+ -+ uivector_init(&blcount); -+ uivector_init(&nextcode); -+ -+ tree->tree1d = (unsigned*)lodepng_malloc(tree->numcodes * sizeof(unsigned)); -+ if(!tree->tree1d) error = 83; /*alloc fail*/ -+ -+ if(!uivector_resizev(&blcount, tree->maxbitlen + 1, 0) -+ || !uivector_resizev(&nextcode, tree->maxbitlen + 1, 0)) -+ error = 83; /*alloc fail*/ -+ -+ if(!error) -+ { -+ /*step 1: count number of instances of each code length*/ -+ for(bits = 0; bits != tree->numcodes; ++bits) ++blcount.data[tree->lengths[bits]]; -+ /*step 2: generate the nextcode values*/ -+ for(bits = 1; bits <= tree->maxbitlen; ++bits) -+ { -+ nextcode.data[bits] = (nextcode.data[bits - 1] + blcount.data[bits - 1]) << 1; -+ } -+ /*step 3: generate all the codes*/ -+ for(n = 0; n != tree->numcodes; ++n) -+ { -+ if(tree->lengths[n] != 0) tree->tree1d[n] = nextcode.data[tree->lengths[n]]++; -+ } -+ } -+ -+ uivector_cleanup(&blcount); -+ uivector_cleanup(&nextcode); -+ -+ if(!error) return HuffmanTree_make2DTree(tree); -+ else return error; -+} -+ -+/* -+given the code lengths (as stored in the PNG file), generate the tree as defined -+by Deflate. maxbitlen is the maximum bits that a code in the tree can have. -+return value is error. -+*/ -+static unsigned HuffmanTree_makeFromLengths(HuffmanTree* tree, const unsigned* bitlen, -+ size_t numcodes, unsigned maxbitlen) -+{ -+ unsigned i; -+ tree->lengths = (unsigned*)lodepng_malloc(numcodes * sizeof(unsigned)); -+ if(!tree->lengths) return 83; /*alloc fail*/ -+ for(i = 0; i != numcodes; ++i) tree->lengths[i] = bitlen[i]; -+ tree->numcodes = (unsigned)numcodes; /*number of symbols*/ -+ tree->maxbitlen = maxbitlen; -+ return HuffmanTree_makeFromLengths2(tree); -+} -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+ -+/*BPM: Boundary Package Merge, see "A Fast and Space-Economical Algorithm for Length-Limited Coding", -+Jyrki Katajainen, Alistair Moffat, Andrew Turpin, 1995.*/ -+ -+/*chain node for boundary package merge*/ -+typedef struct BPMNode -+{ -+ int weight; /*the sum of all weights in this chain*/ -+ unsigned index; /*index of this leaf node (called "count" in the paper)*/ -+ struct BPMNode* tail; /*the next nodes in this chain (null if last)*/ -+ int in_use; -+} BPMNode; -+ -+/*lists of chains*/ -+typedef struct BPMLists -+{ -+ /*memory pool*/ -+ unsigned memsize; -+ BPMNode* memory; -+ unsigned numfree; -+ unsigned nextfree; -+ BPMNode** freelist; -+ /*two heads of lookahead chains per list*/ -+ unsigned listsize; -+ BPMNode** chains0; -+ BPMNode** chains1; -+} BPMLists; -+ -+/*creates a new chain node with the given parameters, from the memory in the lists */ -+static BPMNode* bpmnode_create(BPMLists* lists, int weight, unsigned index, BPMNode* tail) -+{ -+ unsigned i; -+ BPMNode* result; -+ -+ /*memory full, so garbage collect*/ -+ if(lists->nextfree >= lists->numfree) -+ { -+ /*mark only those that are in use*/ -+ for(i = 0; i != lists->memsize; ++i) lists->memory[i].in_use = 0; -+ for(i = 0; i != lists->listsize; ++i) -+ { -+ BPMNode* node; -+ for(node = lists->chains0[i]; node != 0; node = node->tail) node->in_use = 1; -+ for(node = lists->chains1[i]; node != 0; node = node->tail) node->in_use = 1; -+ } -+ /*collect those that are free*/ -+ lists->numfree = 0; -+ for(i = 0; i != lists->memsize; ++i) -+ { -+ if(!lists->memory[i].in_use) lists->freelist[lists->numfree++] = &lists->memory[i]; -+ } -+ lists->nextfree = 0; -+ } -+ -+ result = lists->freelist[lists->nextfree++]; -+ result->weight = weight; -+ result->index = index; -+ result->tail = tail; -+ return result; -+} -+ -+/*sort the leaves with stable mergesort*/ -+static void bpmnode_sort(BPMNode* leaves, size_t num) -+{ -+ BPMNode* mem = (BPMNode*)lodepng_malloc(sizeof(*leaves) * num); -+ size_t width, counter = 0; -+ for(width = 1; width < num; width *= 2) -+ { -+ BPMNode* a = (counter & 1) ? mem : leaves; -+ BPMNode* b = (counter & 1) ? leaves : mem; -+ size_t p; -+ for(p = 0; p < num; p += 2 * width) -+ { -+ size_t q = (p + width > num) ? num : (p + width); -+ size_t r = (p + 2 * width > num) ? num : (p + 2 * width); -+ size_t i = p, j = q, k; -+ for(k = p; k < r; k++) -+ { -+ if(i < q && (j >= r || a[i].weight <= a[j].weight)) b[k] = a[i++]; -+ else b[k] = a[j++]; -+ } -+ } -+ counter++; -+ } -+ if(counter & 1) memcpy(leaves, mem, sizeof(*leaves) * num); -+ lodepng_free(mem); -+} -+ -+/*Boundary Package Merge step, numpresent is the amount of leaves, and c is the current chain.*/ -+static void boundaryPM(BPMLists* lists, BPMNode* leaves, size_t numpresent, int c, int num) -+{ -+ unsigned lastindex = lists->chains1[c]->index; -+ -+ if(c == 0) -+ { -+ if(lastindex >= numpresent) return; -+ lists->chains0[c] = lists->chains1[c]; -+ lists->chains1[c] = bpmnode_create(lists, leaves[lastindex].weight, lastindex + 1, 0); -+ } -+ else -+ { -+ /*sum of the weights of the head nodes of the previous lookahead chains.*/ -+ int sum = lists->chains0[c - 1]->weight + lists->chains1[c - 1]->weight; -+ lists->chains0[c] = lists->chains1[c]; -+ if(lastindex < numpresent && sum > leaves[lastindex].weight) -+ { -+ lists->chains1[c] = bpmnode_create(lists, leaves[lastindex].weight, lastindex + 1, lists->chains1[c]->tail); -+ return; -+ } -+ lists->chains1[c] = bpmnode_create(lists, sum, lastindex, lists->chains1[c - 1]); -+ /*in the end we are only interested in the chain of the last list, so no -+ need to recurse if we're at the last one (this gives measurable speedup)*/ -+ if(num + 1 < (int)(2 * numpresent - 2)) -+ { -+ boundaryPM(lists, leaves, numpresent, c - 1, num); -+ boundaryPM(lists, leaves, numpresent, c - 1, num); -+ } -+ } -+} -+ -+unsigned lodepng_huffman_code_lengths(unsigned* lengths, const unsigned* frequencies, -+ size_t numcodes, unsigned maxbitlen) -+{ -+ unsigned error = 0; -+ unsigned i; -+ size_t numpresent = 0; /*number of symbols with non-zero frequency*/ -+ BPMNode* leaves; /*the symbols, only those with > 0 frequency*/ -+ -+ if(numcodes == 0) return 80; /*error: a tree of 0 symbols is not supposed to be made*/ -+ if((1u << maxbitlen) < numcodes) return 80; /*error: represent all symbols*/ -+ -+ leaves = (BPMNode*)lodepng_malloc(numcodes * sizeof(*leaves)); -+ if(!leaves) return 83; /*alloc fail*/ -+ -+ for(i = 0; i != numcodes; ++i) -+ { -+ if(frequencies[i] > 0) -+ { -+ leaves[numpresent].weight = (int)frequencies[i]; -+ leaves[numpresent].index = i; -+ ++numpresent; -+ } -+ } -+ -+ for(i = 0; i != numcodes; ++i) lengths[i] = 0; -+ -+ /*ensure at least two present symbols. There should be at least one symbol -+ according to RFC 1951 section 3.2.7. Some decoders incorrectly require two. To -+ make these work as well ensure there are at least two symbols. The -+ Package-Merge code below also doesn't work correctly if there's only one -+ symbol, it'd give it the theoritical 0 bits but in practice zlib wants 1 bit*/ -+ if(numpresent == 0) -+ { -+ lengths[0] = lengths[1] = 1; /*note that for RFC 1951 section 3.2.7, only lengths[0] = 1 is needed*/ -+ } -+ else if(numpresent == 1) -+ { -+ lengths[leaves[0].index] = 1; -+ lengths[leaves[0].index == 0 ? 1 : 0] = 1; -+ } -+ else -+ { -+ BPMLists lists; -+ BPMNode* node; -+ -+ bpmnode_sort(leaves, numpresent); -+ -+ lists.listsize = maxbitlen; -+ lists.memsize = 2 * maxbitlen * (maxbitlen + 1); -+ lists.nextfree = 0; -+ lists.numfree = lists.memsize; -+ lists.memory = (BPMNode*)lodepng_malloc(lists.memsize * sizeof(*lists.memory)); -+ lists.freelist = (BPMNode**)lodepng_malloc(lists.memsize * sizeof(BPMNode*)); -+ lists.chains0 = (BPMNode**)lodepng_malloc(lists.listsize * sizeof(BPMNode*)); -+ lists.chains1 = (BPMNode**)lodepng_malloc(lists.listsize * sizeof(BPMNode*)); -+ if(!lists.memory || !lists.freelist || !lists.chains0 || !lists.chains1) error = 83; /*alloc fail*/ -+ -+ if(!error) -+ { -+ for(i = 0; i != lists.memsize; ++i) lists.freelist[i] = &lists.memory[i]; -+ -+ bpmnode_create(&lists, leaves[0].weight, 1, 0); -+ bpmnode_create(&lists, leaves[1].weight, 2, 0); -+ -+ for(i = 0; i != lists.listsize; ++i) -+ { -+ lists.chains0[i] = &lists.memory[0]; -+ lists.chains1[i] = &lists.memory[1]; -+ } -+ -+ /*each boundaryPM call adds one chain to the last list, and we need 2 * numpresent - 2 chains.*/ -+ for(i = 2; i != 2 * numpresent - 2; ++i) boundaryPM(&lists, leaves, numpresent, (int)maxbitlen - 1, (int)i); -+ -+ for(node = lists.chains1[maxbitlen - 1]; node; node = node->tail) -+ { -+ for(i = 0; i != node->index; ++i) ++lengths[leaves[i].index]; -+ } -+ } -+ -+ lodepng_free(lists.memory); -+ lodepng_free(lists.freelist); -+ lodepng_free(lists.chains0); -+ lodepng_free(lists.chains1); -+ } -+ -+ lodepng_free(leaves); -+ return error; -+} -+ -+/*Create the Huffman tree given the symbol frequencies*/ -+static unsigned HuffmanTree_makeFromFrequencies(HuffmanTree* tree, const unsigned* frequencies, -+ size_t mincodes, size_t numcodes, unsigned maxbitlen) -+{ -+ unsigned error = 0; -+ while(!frequencies[numcodes - 1] && numcodes > mincodes) --numcodes; /*trim zeroes*/ -+ tree->maxbitlen = maxbitlen; -+ tree->numcodes = (unsigned)numcodes; /*number of symbols*/ -+ tree->lengths = (unsigned*)lodepng_realloc(tree->lengths, numcodes * sizeof(unsigned)); -+ if(!tree->lengths) return 83; /*alloc fail*/ -+ /*initialize all lengths to 0*/ -+ memset(tree->lengths, 0, numcodes * sizeof(unsigned)); -+ -+ error = lodepng_huffman_code_lengths(tree->lengths, frequencies, numcodes, maxbitlen); -+ if(!error) error = HuffmanTree_makeFromLengths2(tree); -+ return error; -+} -+ -+static unsigned HuffmanTree_getCode(const HuffmanTree* tree, unsigned index) -+{ -+ return tree->tree1d[index]; -+} -+ -+static unsigned HuffmanTree_getLength(const HuffmanTree* tree, unsigned index) -+{ -+ return tree->lengths[index]; -+} -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ -+/*get the literal and length code tree of a deflated block with fixed tree, as per the deflate specification*/ -+static unsigned generateFixedLitLenTree(HuffmanTree* tree) -+{ -+ unsigned i, error = 0; -+ unsigned* bitlen = (unsigned*)lodepng_malloc(NUM_DEFLATE_CODE_SYMBOLS * sizeof(unsigned)); -+ if(!bitlen) return 83; /*alloc fail*/ -+ -+ /*288 possible codes: 0-255=literals, 256=endcode, 257-285=lengthcodes, 286-287=unused*/ -+ for(i = 0; i <= 143; ++i) bitlen[i] = 8; -+ for(i = 144; i <= 255; ++i) bitlen[i] = 9; -+ for(i = 256; i <= 279; ++i) bitlen[i] = 7; -+ for(i = 280; i <= 287; ++i) bitlen[i] = 8; -+ -+ error = HuffmanTree_makeFromLengths(tree, bitlen, NUM_DEFLATE_CODE_SYMBOLS, 15); -+ -+ lodepng_free(bitlen); -+ return error; -+} -+ -+/*get the distance code tree of a deflated block with fixed tree, as specified in the deflate specification*/ -+static unsigned generateFixedDistanceTree(HuffmanTree* tree) -+{ -+ unsigned i, error = 0; -+ unsigned* bitlen = (unsigned*)lodepng_malloc(NUM_DISTANCE_SYMBOLS * sizeof(unsigned)); -+ if(!bitlen) return 83; /*alloc fail*/ -+ -+ /*there are 32 distance codes, but 30-31 are unused*/ -+ for(i = 0; i != NUM_DISTANCE_SYMBOLS; ++i) bitlen[i] = 5; -+ error = HuffmanTree_makeFromLengths(tree, bitlen, NUM_DISTANCE_SYMBOLS, 15); -+ -+ lodepng_free(bitlen); -+ return error; -+} -+ -+#ifdef LODEPNG_COMPILE_DECODER -+ -+/* -+returns the code, or (unsigned)(-1) if error happened -+inbitlength is the length of the complete buffer, in bits (so its byte length times 8) -+*/ -+static unsigned huffmanDecodeSymbol(const unsigned char* in, size_t* bp, -+ const HuffmanTree* codetree, size_t inbitlength) -+{ -+ unsigned treepos = 0, ct; -+ for(;;) -+ { -+ if(*bp >= inbitlength) return (unsigned)(-1); /*error: end of input memory reached without endcode*/ -+ /* -+ decode the symbol from the tree. The "readBitFromStream" code is inlined in -+ the expression below because this is the biggest bottleneck while decoding -+ */ -+ ct = codetree->tree2d[(treepos << 1) + READBIT(*bp, in)]; -+ ++(*bp); -+ if(ct < codetree->numcodes) return ct; /*the symbol is decoded, return it*/ -+ else treepos = ct - codetree->numcodes; /*symbol not yet decoded, instead move tree position*/ -+ -+ if(treepos >= codetree->numcodes) return (unsigned)(-1); /*error: it appeared outside the codetree*/ -+ } -+} -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+#ifdef LODEPNG_COMPILE_DECODER -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* / Inflator (Decompressor) / */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+/*get the tree of a deflated block with fixed tree, as specified in the deflate specification*/ -+static void getTreeInflateFixed(HuffmanTree* tree_ll, HuffmanTree* tree_d) -+{ -+ /*TODO: check for out of memory errors*/ -+ generateFixedLitLenTree(tree_ll); -+ generateFixedDistanceTree(tree_d); -+} -+ -+/*get the tree of a deflated block with dynamic tree, the tree itself is also Huffman compressed with a known tree*/ -+static unsigned getTreeInflateDynamic(HuffmanTree* tree_ll, HuffmanTree* tree_d, -+ const unsigned char* in, size_t* bp, size_t inlength) -+{ -+ /*make sure that length values that aren't filled in will be 0, or a wrong tree will be generated*/ -+ unsigned error = 0; -+ unsigned n, HLIT, HDIST, HCLEN, i; -+ size_t inbitlength = inlength * 8; -+ -+ /*see comments in deflateDynamic for explanation of the context and these variables, it is analogous*/ -+ unsigned* bitlen_ll = 0; /*lit,len code lengths*/ -+ unsigned* bitlen_d = 0; /*dist code lengths*/ -+ /*code length code lengths ("clcl"), the bit lengths of the huffman tree used to compress bitlen_ll and bitlen_d*/ -+ unsigned* bitlen_cl = 0; -+ HuffmanTree tree_cl; /*the code tree for code length codes (the huffman tree for compressed huffman trees)*/ -+ -+ if((*bp) + 14 > (inlength << 3)) return 49; /*error: the bit pointer is or will go past the memory*/ -+ -+ /*number of literal/length codes + 257. Unlike the spec, the value 257 is added to it here already*/ -+ HLIT = readBitsFromStream(bp, in, 5) + 257; -+ /*number of distance codes. Unlike the spec, the value 1 is added to it here already*/ -+ HDIST = readBitsFromStream(bp, in, 5) + 1; -+ /*number of code length codes. Unlike the spec, the value 4 is added to it here already*/ -+ HCLEN = readBitsFromStream(bp, in, 4) + 4; -+ -+ if((*bp) + HCLEN * 3 > (inlength << 3)) return 50; /*error: the bit pointer is or will go past the memory*/ -+ -+ HuffmanTree_init(&tree_cl); -+ -+ while(!error) -+ { -+ /*read the code length codes out of 3 * (amount of code length codes) bits*/ -+ -+ bitlen_cl = (unsigned*)lodepng_malloc(NUM_CODE_LENGTH_CODES * sizeof(unsigned)); -+ if(!bitlen_cl) ERROR_BREAK(83 /*alloc fail*/); -+ -+ for(i = 0; i != NUM_CODE_LENGTH_CODES; ++i) -+ { -+ if(i < HCLEN) bitlen_cl[CLCL_ORDER[i]] = readBitsFromStream(bp, in, 3); -+ else bitlen_cl[CLCL_ORDER[i]] = 0; /*if not, it must stay 0*/ -+ } -+ -+ error = HuffmanTree_makeFromLengths(&tree_cl, bitlen_cl, NUM_CODE_LENGTH_CODES, 7); -+ if(error) break; -+ -+ /*now we can use this tree to read the lengths for the tree that this function will return*/ -+ bitlen_ll = (unsigned*)lodepng_malloc(NUM_DEFLATE_CODE_SYMBOLS * sizeof(unsigned)); -+ bitlen_d = (unsigned*)lodepng_malloc(NUM_DISTANCE_SYMBOLS * sizeof(unsigned)); -+ if(!bitlen_ll || !bitlen_d) ERROR_BREAK(83 /*alloc fail*/); -+ for(i = 0; i != NUM_DEFLATE_CODE_SYMBOLS; ++i) bitlen_ll[i] = 0; -+ for(i = 0; i != NUM_DISTANCE_SYMBOLS; ++i) bitlen_d[i] = 0; -+ -+ /*i is the current symbol we're reading in the part that contains the code lengths of lit/len and dist codes*/ -+ i = 0; -+ while(i < HLIT + HDIST) -+ { -+ unsigned code = huffmanDecodeSymbol(in, bp, &tree_cl, inbitlength); -+ if(code <= 15) /*a length code*/ -+ { -+ if(i < HLIT) bitlen_ll[i] = code; -+ else bitlen_d[i - HLIT] = code; -+ ++i; -+ } -+ else if(code == 16) /*repeat previous*/ -+ { -+ unsigned replength = 3; /*read in the 2 bits that indicate repeat length (3-6)*/ -+ unsigned value; /*set value to the previous code*/ -+ -+ if(i == 0) ERROR_BREAK(54); /*can't repeat previous if i is 0*/ -+ -+ if((*bp + 2) > inbitlength) ERROR_BREAK(50); /*error, bit pointer jumps past memory*/ -+ replength += readBitsFromStream(bp, in, 2); -+ -+ if(i < HLIT + 1) value = bitlen_ll[i - 1]; -+ else value = bitlen_d[i - HLIT - 1]; -+ /*repeat this value in the next lengths*/ -+ for(n = 0; n < replength; ++n) -+ { -+ if(i >= HLIT + HDIST) ERROR_BREAK(13); /*error: i is larger than the amount of codes*/ -+ if(i < HLIT) bitlen_ll[i] = value; -+ else bitlen_d[i - HLIT] = value; -+ ++i; -+ } -+ } -+ else if(code == 17) /*repeat "0" 3-10 times*/ -+ { -+ unsigned replength = 3; /*read in the bits that indicate repeat length*/ -+ if((*bp + 3) > inbitlength) ERROR_BREAK(50); /*error, bit pointer jumps past memory*/ -+ replength += readBitsFromStream(bp, in, 3); -+ -+ /*repeat this value in the next lengths*/ -+ for(n = 0; n < replength; ++n) -+ { -+ if(i >= HLIT + HDIST) ERROR_BREAK(14); /*error: i is larger than the amount of codes*/ -+ -+ if(i < HLIT) bitlen_ll[i] = 0; -+ else bitlen_d[i - HLIT] = 0; -+ ++i; -+ } -+ } -+ else if(code == 18) /*repeat "0" 11-138 times*/ -+ { -+ unsigned replength = 11; /*read in the bits that indicate repeat length*/ -+ if((*bp + 7) > inbitlength) ERROR_BREAK(50); /*error, bit pointer jumps past memory*/ -+ replength += readBitsFromStream(bp, in, 7); -+ -+ /*repeat this value in the next lengths*/ -+ for(n = 0; n < replength; ++n) -+ { -+ if(i >= HLIT + HDIST) ERROR_BREAK(15); /*error: i is larger than the amount of codes*/ -+ -+ if(i < HLIT) bitlen_ll[i] = 0; -+ else bitlen_d[i - HLIT] = 0; -+ ++i; -+ } -+ } -+ else /*if(code == (unsigned)(-1))*/ /*huffmanDecodeSymbol returns (unsigned)(-1) in case of error*/ -+ { -+ if(code == (unsigned)(-1)) -+ { -+ /*return error code 10 or 11 depending on the situation that happened in huffmanDecodeSymbol -+ (10=no endcode, 11=wrong jump outside of tree)*/ -+ error = (*bp) > inbitlength ? 10 : 11; -+ } -+ else error = 16; /*unexisting code, this can never happen*/ -+ break; -+ } -+ } -+ if(error) break; -+ -+ if(bitlen_ll[256] == 0) ERROR_BREAK(64); /*the length of the end code 256 must be larger than 0*/ -+ -+ /*now we've finally got HLIT and HDIST, so generate the code trees, and the function is done*/ -+ error = HuffmanTree_makeFromLengths(tree_ll, bitlen_ll, NUM_DEFLATE_CODE_SYMBOLS, 15); -+ if(error) break; -+ error = HuffmanTree_makeFromLengths(tree_d, bitlen_d, NUM_DISTANCE_SYMBOLS, 15); -+ -+ break; /*end of error-while*/ -+ } -+ -+ lodepng_free(bitlen_cl); -+ lodepng_free(bitlen_ll); -+ lodepng_free(bitlen_d); -+ HuffmanTree_cleanup(&tree_cl); -+ -+ return error; -+} -+ -+/*inflate a block with dynamic of fixed Huffman tree*/ -+static unsigned inflateHuffmanBlock(ucvector* out, const unsigned char* in, size_t* bp, -+ size_t* pos, size_t inlength, unsigned btype) -+{ -+ unsigned error = 0; -+ HuffmanTree tree_ll; /*the huffman tree for literal and length codes*/ -+ HuffmanTree tree_d; /*the huffman tree for distance codes*/ -+ size_t inbitlength = inlength * 8; -+ -+ HuffmanTree_init(&tree_ll); -+ HuffmanTree_init(&tree_d); -+ -+ if(btype == 1) getTreeInflateFixed(&tree_ll, &tree_d); -+ else if(btype == 2) error = getTreeInflateDynamic(&tree_ll, &tree_d, in, bp, inlength); -+ -+ while(!error) /*decode all symbols until end reached, breaks at end code*/ -+ { -+ /*code_ll is literal, length or end code*/ -+ unsigned code_ll = huffmanDecodeSymbol(in, bp, &tree_ll, inbitlength); -+ if(code_ll <= 255) /*literal symbol*/ -+ { -+ /*ucvector_push_back would do the same, but for some reason the two lines below run 10% faster*/ -+ if(!ucvector_resize(out, (*pos) + 1)) ERROR_BREAK(83 /*alloc fail*/); -+ out->data[*pos] = (unsigned char)code_ll; -+ ++(*pos); -+ } -+ else if(code_ll >= FIRST_LENGTH_CODE_INDEX && code_ll <= LAST_LENGTH_CODE_INDEX) /*length code*/ -+ { -+ unsigned code_d, distance; -+ unsigned numextrabits_l, numextrabits_d; /*extra bits for length and distance*/ -+ size_t start, forward, backward, length; -+ -+ /*part 1: get length base*/ -+ length = LENGTHBASE[code_ll - FIRST_LENGTH_CODE_INDEX]; -+ -+ /*part 2: get extra bits and add the value of that to length*/ -+ numextrabits_l = LENGTHEXTRA[code_ll - FIRST_LENGTH_CODE_INDEX]; -+ if((*bp + numextrabits_l) > inbitlength) ERROR_BREAK(51); /*error, bit pointer will jump past memory*/ -+ length += readBitsFromStream(bp, in, numextrabits_l); -+ -+ /*part 3: get distance code*/ -+ code_d = huffmanDecodeSymbol(in, bp, &tree_d, inbitlength); -+ if(code_d > 29) -+ { -+ if(code_ll == (unsigned)(-1)) /*huffmanDecodeSymbol returns (unsigned)(-1) in case of error*/ -+ { -+ /*return error code 10 or 11 depending on the situation that happened in huffmanDecodeSymbol -+ (10=no endcode, 11=wrong jump outside of tree)*/ -+ error = (*bp) > inlength * 8 ? 10 : 11; -+ } -+ else error = 18; /*error: invalid distance code (30-31 are never used)*/ -+ break; -+ } -+ distance = DISTANCEBASE[code_d]; -+ -+ /*part 4: get extra bits from distance*/ -+ numextrabits_d = DISTANCEEXTRA[code_d]; -+ if((*bp + numextrabits_d) > inbitlength) ERROR_BREAK(51); /*error, bit pointer will jump past memory*/ -+ distance += readBitsFromStream(bp, in, numextrabits_d); -+ -+ /*part 5: fill in all the out[n] values based on the length and dist*/ -+ start = (*pos); -+ if(distance > start) ERROR_BREAK(52); /*too long backward distance*/ -+ backward = start - distance; -+ -+ if(!ucvector_resize(out, (*pos) + length)) ERROR_BREAK(83 /*alloc fail*/); -+ if (distance < length) { -+ for(forward = 0; forward < length; ++forward) -+ { -+ out->data[(*pos)++] = out->data[backward++]; -+ } -+ } else { -+ memcpy(out->data + *pos, out->data + backward, length); -+ *pos += length; -+ } -+ } -+ else if(code_ll == 256) -+ { -+ break; /*end code, break the loop*/ -+ } -+ else /*if(code == (unsigned)(-1))*/ /*huffmanDecodeSymbol returns (unsigned)(-1) in case of error*/ -+ { -+ /*return error code 10 or 11 depending on the situation that happened in huffmanDecodeSymbol -+ (10=no endcode, 11=wrong jump outside of tree)*/ -+ error = ((*bp) > inlength * 8) ? 10 : 11; -+ break; -+ } -+ } -+ -+ HuffmanTree_cleanup(&tree_ll); -+ HuffmanTree_cleanup(&tree_d); -+ -+ return error; -+} -+ -+static unsigned inflateNoCompression(ucvector* out, const unsigned char* in, size_t* bp, size_t* pos, size_t inlength) -+{ -+ size_t p; -+ unsigned LEN, NLEN, n, error = 0; -+ -+ /*go to first boundary of byte*/ -+ while(((*bp) & 0x7) != 0) ++(*bp); -+ p = (*bp) / 8; /*byte position*/ -+ -+ /*read LEN (2 bytes) and NLEN (2 bytes)*/ -+ if(p + 4 >= inlength) return 52; /*error, bit pointer will jump past memory*/ -+ LEN = in[p] + 256u * in[p + 1]; p += 2; -+ NLEN = in[p] + 256u * in[p + 1]; p += 2; -+ -+ /*check if 16-bit NLEN is really the one's complement of LEN*/ -+ if(LEN + NLEN != 65535) return 21; /*error: NLEN is not one's complement of LEN*/ -+ -+ if(!ucvector_resize(out, (*pos) + LEN)) return 83; /*alloc fail*/ -+ -+ /*read the literal data: LEN bytes are now stored in the out buffer*/ -+ if(p + LEN > inlength) return 23; /*error: reading outside of in buffer*/ -+ for(n = 0; n < LEN; ++n) out->data[(*pos)++] = in[p++]; -+ -+ (*bp) = p * 8; -+ -+ return error; -+} -+ -+static unsigned lodepng_inflatev(ucvector* out, -+ const unsigned char* in, size_t insize, -+ const LodePNGDecompressSettings* settings) -+{ -+ /*bit pointer in the "in" data, current byte is bp >> 3, current bit is bp & 0x7 (from lsb to msb of the byte)*/ -+ size_t bp = 0; -+ unsigned BFINAL = 0; -+ size_t pos = 0; /*byte position in the out buffer*/ -+ unsigned error = 0; -+ -+ (void)settings; -+ -+ while(!BFINAL) -+ { -+ unsigned BTYPE; -+ if(bp + 2 >= insize * 8) return 52; /*error, bit pointer will jump past memory*/ -+ BFINAL = readBitFromStream(&bp, in); -+ BTYPE = 1u * readBitFromStream(&bp, in); -+ BTYPE += 2u * readBitFromStream(&bp, in); -+ -+ if(BTYPE == 3) return 20; /*error: invalid BTYPE*/ -+ else if(BTYPE == 0) error = inflateNoCompression(out, in, &bp, &pos, insize); /*no compression*/ -+ else error = inflateHuffmanBlock(out, in, &bp, &pos, insize, BTYPE); /*compression, BTYPE 01 or 10*/ -+ -+ if(error) return error; -+ } -+ -+ return error; -+} -+ -+unsigned lodepng_inflate(unsigned char** out, size_t* outsize, -+ const unsigned char* in, size_t insize, -+ const LodePNGDecompressSettings* settings) -+{ -+ unsigned error; -+ ucvector v; -+ ucvector_init_buffer(&v, *out, *outsize); -+ error = lodepng_inflatev(&v, in, insize, settings); -+ *out = v.data; -+ *outsize = v.size; -+ return error; -+} -+ -+static unsigned inflate(unsigned char** out, size_t* outsize, -+ const unsigned char* in, size_t insize, -+ const LodePNGDecompressSettings* settings) -+{ -+ if(settings->custom_inflate) -+ { -+ return settings->custom_inflate(out, outsize, in, insize, settings); -+ } -+ else -+ { -+ return lodepng_inflate(out, outsize, in, insize, settings); -+ } -+} -+ -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* / Deflator (Compressor) / */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+static const size_t MAX_SUPPORTED_DEFLATE_LENGTH = 258; -+ -+/*bitlen is the size in bits of the code*/ -+static void addHuffmanSymbol(size_t* bp, ucvector* compressed, unsigned code, unsigned bitlen) -+{ -+ addBitsToStreamReversed(bp, compressed, code, bitlen); -+} -+ -+/*search the index in the array, that has the largest value smaller than or equal to the given value, -+given array must be sorted (if no value is smaller, it returns the size of the given array)*/ -+static size_t searchCodeIndex(const unsigned* array, size_t array_size, size_t value) -+{ -+ /*binary search (only small gain over linear). TODO: use CPU log2 instruction for getting symbols instead*/ -+ size_t left = 1; -+ size_t right = array_size - 1; -+ -+ while(left <= right) { -+ size_t mid = (left + right) >> 1; -+ if (array[mid] >= value) right = mid - 1; -+ else left = mid + 1; -+ } -+ if(left >= array_size || array[left] > value) left--; -+ return left; -+} -+ -+static void addLengthDistance(uivector* values, size_t length, size_t distance) -+{ -+ /*values in encoded vector are those used by deflate: -+ 0-255: literal bytes -+ 256: end -+ 257-285: length/distance pair (length code, followed by extra length bits, distance code, extra distance bits) -+ 286-287: invalid*/ -+ -+ unsigned length_code = (unsigned)searchCodeIndex(LENGTHBASE, 29, length); -+ unsigned extra_length = (unsigned)(length - LENGTHBASE[length_code]); -+ unsigned dist_code = (unsigned)searchCodeIndex(DISTANCEBASE, 30, distance); -+ unsigned extra_distance = (unsigned)(distance - DISTANCEBASE[dist_code]); -+ -+ uivector_push_back(values, length_code + FIRST_LENGTH_CODE_INDEX); -+ uivector_push_back(values, extra_length); -+ uivector_push_back(values, dist_code); -+ uivector_push_back(values, extra_distance); -+} -+ -+/*3 bytes of data get encoded into two bytes. The hash cannot use more than 3 -+bytes as input because 3 is the minimum match length for deflate*/ -+static const unsigned HASH_NUM_VALUES = 65536; -+static const unsigned HASH_BIT_MASK = 65535; /*HASH_NUM_VALUES - 1, but C90 does not like that as initializer*/ -+ -+typedef struct Hash -+{ -+ int* head; /*hash value to head circular pos - can be outdated if went around window*/ -+ /*circular pos to prev circular pos*/ -+ unsigned short* chain; -+ int* val; /*circular pos to hash value*/ -+ -+ /*TODO: do this not only for zeros but for any repeated byte. However for PNG -+ it's always going to be the zeros that dominate, so not important for PNG*/ -+ int* headz; /*similar to head, but for chainz*/ -+ unsigned short* chainz; /*those with same amount of zeros*/ -+ unsigned short* zeros; /*length of zeros streak, used as a second hash chain*/ -+} Hash; -+ -+static unsigned hash_init(Hash* hash, unsigned windowsize) -+{ -+ unsigned i; -+ hash->head = (int*)lodepng_malloc(sizeof(int) * HASH_NUM_VALUES); -+ hash->val = (int*)lodepng_malloc(sizeof(int) * windowsize); -+ hash->chain = (unsigned short*)lodepng_malloc(sizeof(unsigned short) * windowsize); -+ -+ hash->zeros = (unsigned short*)lodepng_malloc(sizeof(unsigned short) * windowsize); -+ hash->headz = (int*)lodepng_malloc(sizeof(int) * (MAX_SUPPORTED_DEFLATE_LENGTH + 1)); -+ hash->chainz = (unsigned short*)lodepng_malloc(sizeof(unsigned short) * windowsize); -+ -+ if(!hash->head || !hash->chain || !hash->val || !hash->headz|| !hash->chainz || !hash->zeros) -+ { -+ return 83; /*alloc fail*/ -+ } -+ -+ /*initialize hash table*/ -+ for(i = 0; i != HASH_NUM_VALUES; ++i) hash->head[i] = -1; -+ for(i = 0; i != windowsize; ++i) hash->val[i] = -1; -+ for(i = 0; i != windowsize; ++i) hash->chain[i] = i; /*same value as index indicates uninitialized*/ -+ -+ for(i = 0; i <= MAX_SUPPORTED_DEFLATE_LENGTH; ++i) hash->headz[i] = -1; -+ for(i = 0; i != windowsize; ++i) hash->chainz[i] = i; /*same value as index indicates uninitialized*/ -+ -+ return 0; -+} -+ -+static void hash_cleanup(Hash* hash) -+{ -+ lodepng_free(hash->head); -+ lodepng_free(hash->val); -+ lodepng_free(hash->chain); -+ -+ lodepng_free(hash->zeros); -+ lodepng_free(hash->headz); -+ lodepng_free(hash->chainz); -+} -+ -+ -+ -+static unsigned getHash(const unsigned char* data, size_t size, size_t pos) -+{ -+ unsigned result = 0; -+ if(pos + 2 < size) -+ { -+ /*A simple shift and xor hash is used. Since the data of PNGs is dominated -+ by zeroes due to the filters, a better hash does not have a significant -+ effect on speed in traversing the chain, and causes more time spend on -+ calculating the hash.*/ -+ result ^= (unsigned)(data[pos + 0] << 0u); -+ result ^= (unsigned)(data[pos + 1] << 4u); -+ result ^= (unsigned)(data[pos + 2] << 8u); -+ } else { -+ size_t amount, i; -+ if(pos >= size) return 0; -+ amount = size - pos; -+ for(i = 0; i != amount; ++i) result ^= (unsigned)(data[pos + i] << (i * 8u)); -+ } -+ return result & HASH_BIT_MASK; -+} -+ -+static unsigned countZeros(const unsigned char* data, size_t size, size_t pos) -+{ -+ const unsigned char* start = data + pos; -+ const unsigned char* end = start + MAX_SUPPORTED_DEFLATE_LENGTH; -+ if(end > data + size) end = data + size; -+ data = start; -+ while(data != end && *data == 0) ++data; -+ /*subtracting two addresses returned as 32-bit number (max value is MAX_SUPPORTED_DEFLATE_LENGTH)*/ -+ return (unsigned)(data - start); -+} -+ -+/*wpos = pos & (windowsize - 1)*/ -+static void updateHashChain(Hash* hash, size_t wpos, unsigned hashval, unsigned short numzeros) -+{ -+ hash->val[wpos] = (int)hashval; -+ if(hash->head[hashval] != -1) hash->chain[wpos] = hash->head[hashval]; -+ hash->head[hashval] = wpos; -+ -+ hash->zeros[wpos] = numzeros; -+ if(hash->headz[numzeros] != -1) hash->chainz[wpos] = hash->headz[numzeros]; -+ hash->headz[numzeros] = wpos; -+} -+ -+/* -+LZ77-encode the data. Return value is error code. The input are raw bytes, the output -+is in the form of unsigned integers with codes representing for example literal bytes, or -+length/distance pairs. -+It uses a hash table technique to let it encode faster. When doing LZ77 encoding, a -+sliding window (of windowsize) is used, and all past bytes in that window can be used as -+the "dictionary". A brute force search through all possible distances would be slow, and -+this hash technique is one out of several ways to speed this up. -+*/ -+static unsigned encodeLZ77(uivector* out, Hash* hash, -+ const unsigned char* in, size_t inpos, size_t insize, unsigned windowsize, -+ unsigned minmatch, unsigned nicematch, unsigned lazymatching) -+{ -+ size_t pos; -+ unsigned i, error = 0; -+ /*for large window lengths, assume the user wants no compression loss. Otherwise, max hash chain length speedup.*/ -+ unsigned maxchainlength = windowsize >= 8192 ? windowsize : windowsize / 8; -+ unsigned maxlazymatch = windowsize >= 8192 ? MAX_SUPPORTED_DEFLATE_LENGTH : 64; -+ -+ unsigned usezeros = 1; /*not sure if setting it to false for windowsize < 8192 is better or worse*/ -+ unsigned numzeros = 0; -+ -+ unsigned offset; /*the offset represents the distance in LZ77 terminology*/ -+ unsigned length; -+ unsigned lazy = 0; -+ unsigned lazylength = 0, lazyoffset = 0; -+ unsigned hashval; -+ unsigned current_offset, current_length; -+ unsigned prev_offset; -+ const unsigned char *lastptr, *foreptr, *backptr; -+ unsigned hashpos; -+ -+ if(windowsize == 0 || windowsize > 32768) return 60; /*error: windowsize smaller/larger than allowed*/ -+ if((windowsize & (windowsize - 1)) != 0) return 90; /*error: must be power of two*/ -+ -+ if(nicematch > MAX_SUPPORTED_DEFLATE_LENGTH) nicematch = MAX_SUPPORTED_DEFLATE_LENGTH; -+ -+ for(pos = inpos; pos < insize; ++pos) -+ { -+ size_t wpos = pos & (windowsize - 1); /*position for in 'circular' hash buffers*/ -+ unsigned chainlength = 0; -+ -+ hashval = getHash(in, insize, pos); -+ -+ if(usezeros && hashval == 0) -+ { -+ if(numzeros == 0) numzeros = countZeros(in, insize, pos); -+ else if(pos + numzeros > insize || in[pos + numzeros - 1] != 0) --numzeros; -+ } -+ else -+ { -+ numzeros = 0; -+ } -+ -+ updateHashChain(hash, wpos, hashval, numzeros); -+ -+ /*the length and offset found for the current position*/ -+ length = 0; -+ offset = 0; -+ -+ hashpos = hash->chain[wpos]; -+ -+ lastptr = &in[insize < pos + MAX_SUPPORTED_DEFLATE_LENGTH ? insize : pos + MAX_SUPPORTED_DEFLATE_LENGTH]; -+ -+ /*search for the longest string*/ -+ prev_offset = 0; -+ for(;;) -+ { -+ if(chainlength++ >= maxchainlength) break; -+ current_offset = hashpos <= wpos ? wpos - hashpos : wpos - hashpos + windowsize; -+ -+ if(current_offset < prev_offset) break; /*stop when went completely around the circular buffer*/ -+ prev_offset = current_offset; -+ if(current_offset > 0) -+ { -+ /*test the next characters*/ -+ foreptr = &in[pos]; -+ backptr = &in[pos - current_offset]; -+ -+ /*common case in PNGs is lots of zeros. Quickly skip over them as a speedup*/ -+ if(numzeros >= 3) -+ { -+ unsigned skip = hash->zeros[hashpos]; -+ if(skip > numzeros) skip = numzeros; -+ backptr += skip; -+ foreptr += skip; -+ } -+ -+ while(foreptr != lastptr && *backptr == *foreptr) /*maximum supported length by deflate is max length*/ -+ { -+ ++backptr; -+ ++foreptr; -+ } -+ current_length = (unsigned)(foreptr - &in[pos]); -+ -+ if(current_length > length) -+ { -+ length = current_length; /*the longest length*/ -+ offset = current_offset; /*the offset that is related to this longest length*/ -+ /*jump out once a length of max length is found (speed gain). This also jumps -+ out if length is MAX_SUPPORTED_DEFLATE_LENGTH*/ -+ if(current_length >= nicematch) break; -+ } -+ } -+ -+ if(hashpos == hash->chain[hashpos]) break; -+ -+ if(numzeros >= 3 && length > numzeros) -+ { -+ hashpos = hash->chainz[hashpos]; -+ if(hash->zeros[hashpos] != numzeros) break; -+ } -+ else -+ { -+ hashpos = hash->chain[hashpos]; -+ /*outdated hash value, happens if particular value was not encountered in whole last window*/ -+ if(hash->val[hashpos] != (int)hashval) break; -+ } -+ } -+ -+ if(lazymatching) -+ { -+ if(!lazy && length >= 3 && length <= maxlazymatch && length < MAX_SUPPORTED_DEFLATE_LENGTH) -+ { -+ lazy = 1; -+ lazylength = length; -+ lazyoffset = offset; -+ continue; /*try the next byte*/ -+ } -+ if(lazy) -+ { -+ lazy = 0; -+ if(pos == 0) ERROR_BREAK(81); -+ if(length > lazylength + 1) -+ { -+ /*push the previous character as literal*/ -+ if(!uivector_push_back(out, in[pos - 1])) ERROR_BREAK(83 /*alloc fail*/); -+ } -+ else -+ { -+ length = lazylength; -+ offset = lazyoffset; -+ hash->head[hashval] = -1; /*the same hashchain update will be done, this ensures no wrong alteration*/ -+ hash->headz[numzeros] = -1; /*idem*/ -+ --pos; -+ } -+ } -+ } -+ if(length >= 3 && offset > windowsize) ERROR_BREAK(86 /*too big (or overflown negative) offset*/); -+ -+ /*encode it as length/distance pair or literal value*/ -+ if(length < 3) /*only lengths of 3 or higher are supported as length/distance pair*/ -+ { -+ if(!uivector_push_back(out, in[pos])) ERROR_BREAK(83 /*alloc fail*/); -+ } -+ else if(length < minmatch || (length == 3 && offset > 4096)) -+ { -+ /*compensate for the fact that longer offsets have more extra bits, a -+ length of only 3 may be not worth it then*/ -+ if(!uivector_push_back(out, in[pos])) ERROR_BREAK(83 /*alloc fail*/); -+ } -+ else -+ { -+ addLengthDistance(out, length, offset); -+ for(i = 1; i < length; ++i) -+ { -+ ++pos; -+ wpos = pos & (windowsize - 1); -+ hashval = getHash(in, insize, pos); -+ if(usezeros && hashval == 0) -+ { -+ if(numzeros == 0) numzeros = countZeros(in, insize, pos); -+ else if(pos + numzeros > insize || in[pos + numzeros - 1] != 0) --numzeros; -+ } -+ else -+ { -+ numzeros = 0; -+ } -+ updateHashChain(hash, wpos, hashval, numzeros); -+ } -+ } -+ } /*end of the loop through each character of input*/ -+ -+ return error; -+} -+ -+/* /////////////////////////////////////////////////////////////////////////// */ -+ -+static unsigned deflateNoCompression(ucvector* out, const unsigned char* data, size_t datasize) -+{ -+ /*non compressed deflate block data: 1 bit BFINAL,2 bits BTYPE,(5 bits): it jumps to start of next byte, -+ 2 bytes LEN, 2 bytes NLEN, LEN bytes literal DATA*/ -+ -+ size_t i, j, numdeflateblocks = (datasize + 65534) / 65535; -+ unsigned datapos = 0; -+ for(i = 0; i != numdeflateblocks; ++i) -+ { -+ unsigned BFINAL, BTYPE, LEN, NLEN; -+ unsigned char firstbyte; -+ -+ BFINAL = (i == numdeflateblocks - 1); -+ BTYPE = 0; -+ -+ firstbyte = (unsigned char)(BFINAL + ((BTYPE & 1) << 1) + ((BTYPE & 2) << 1)); -+ ucvector_push_back(out, firstbyte); -+ -+ LEN = 65535; -+ if(datasize - datapos < 65535) LEN = (unsigned)datasize - datapos; -+ NLEN = 65535 - LEN; -+ -+ ucvector_push_back(out, (unsigned char)(LEN & 255)); -+ ucvector_push_back(out, (unsigned char)(LEN >> 8)); -+ ucvector_push_back(out, (unsigned char)(NLEN & 255)); -+ ucvector_push_back(out, (unsigned char)(NLEN >> 8)); -+ -+ /*Decompressed data*/ -+ for(j = 0; j < 65535 && datapos < datasize; ++j) -+ { -+ ucvector_push_back(out, data[datapos++]); -+ } -+ } -+ -+ return 0; -+} -+ -+/* -+write the lz77-encoded data, which has lit, len and dist codes, to compressed stream using huffman trees. -+tree_ll: the tree for lit and len codes. -+tree_d: the tree for distance codes. -+*/ -+static void writeLZ77data(size_t* bp, ucvector* out, const uivector* lz77_encoded, -+ const HuffmanTree* tree_ll, const HuffmanTree* tree_d) -+{ -+ size_t i = 0; -+ for(i = 0; i != lz77_encoded->size; ++i) -+ { -+ unsigned val = lz77_encoded->data[i]; -+ addHuffmanSymbol(bp, out, HuffmanTree_getCode(tree_ll, val), HuffmanTree_getLength(tree_ll, val)); -+ if(val > 256) /*for a length code, 3 more things have to be added*/ -+ { -+ unsigned length_index = val - FIRST_LENGTH_CODE_INDEX; -+ unsigned n_length_extra_bits = LENGTHEXTRA[length_index]; -+ unsigned length_extra_bits = lz77_encoded->data[++i]; -+ -+ unsigned distance_code = lz77_encoded->data[++i]; -+ -+ unsigned distance_index = distance_code; -+ unsigned n_distance_extra_bits = DISTANCEEXTRA[distance_index]; -+ unsigned distance_extra_bits = lz77_encoded->data[++i]; -+ -+ addBitsToStream(bp, out, length_extra_bits, n_length_extra_bits); -+ addHuffmanSymbol(bp, out, HuffmanTree_getCode(tree_d, distance_code), -+ HuffmanTree_getLength(tree_d, distance_code)); -+ addBitsToStream(bp, out, distance_extra_bits, n_distance_extra_bits); -+ } -+ } -+} -+ -+/*Deflate for a block of type "dynamic", that is, with freely, optimally, created huffman trees*/ -+static unsigned deflateDynamic(ucvector* out, size_t* bp, Hash* hash, -+ const unsigned char* data, size_t datapos, size_t dataend, -+ const LodePNGCompressSettings* settings, unsigned final) -+{ -+ unsigned error = 0; -+ -+ /* -+ A block is compressed as follows: The PNG data is lz77 encoded, resulting in -+ literal bytes and length/distance pairs. This is then huffman compressed with -+ two huffman trees. One huffman tree is used for the lit and len values ("ll"), -+ another huffman tree is used for the dist values ("d"). These two trees are -+ stored using their code lengths, and to compress even more these code lengths -+ are also run-length encoded and huffman compressed. This gives a huffman tree -+ of code lengths "cl". The code lenghts used to describe this third tree are -+ the code length code lengths ("clcl"). -+ */ -+ -+ /*The lz77 encoded data, represented with integers since there will also be length and distance codes in it*/ -+ uivector lz77_encoded; -+ HuffmanTree tree_ll; /*tree for lit,len values*/ -+ HuffmanTree tree_d; /*tree for distance codes*/ -+ HuffmanTree tree_cl; /*tree for encoding the code lengths representing tree_ll and tree_d*/ -+ uivector frequencies_ll; /*frequency of lit,len codes*/ -+ uivector frequencies_d; /*frequency of dist codes*/ -+ uivector frequencies_cl; /*frequency of code length codes*/ -+ uivector bitlen_lld; /*lit,len,dist code lenghts (int bits), literally (without repeat codes).*/ -+ uivector bitlen_lld_e; /*bitlen_lld encoded with repeat codes (this is a rudemtary run length compression)*/ -+ /*bitlen_cl is the code length code lengths ("clcl"). The bit lengths of codes to represent tree_cl -+ (these are written as is in the file, it would be crazy to compress these using yet another huffman -+ tree that needs to be represented by yet another set of code lengths)*/ -+ uivector bitlen_cl; -+ size_t datasize = dataend - datapos; -+ -+ /* -+ Due to the huffman compression of huffman tree representations ("two levels"), there are some anologies: -+ bitlen_lld is to tree_cl what data is to tree_ll and tree_d. -+ bitlen_lld_e is to bitlen_lld what lz77_encoded is to data. -+ bitlen_cl is to bitlen_lld_e what bitlen_lld is to lz77_encoded. -+ */ -+ -+ unsigned BFINAL = final; -+ size_t numcodes_ll, numcodes_d, i; -+ unsigned HLIT, HDIST, HCLEN; -+ -+ uivector_init(&lz77_encoded); -+ HuffmanTree_init(&tree_ll); -+ HuffmanTree_init(&tree_d); -+ HuffmanTree_init(&tree_cl); -+ uivector_init(&frequencies_ll); -+ uivector_init(&frequencies_d); -+ uivector_init(&frequencies_cl); -+ uivector_init(&bitlen_lld); -+ uivector_init(&bitlen_lld_e); -+ uivector_init(&bitlen_cl); -+ -+ /*This while loop never loops due to a break at the end, it is here to -+ allow breaking out of it to the cleanup phase on error conditions.*/ -+ while(!error) -+ { -+ if(settings->use_lz77) -+ { -+ error = encodeLZ77(&lz77_encoded, hash, data, datapos, dataend, settings->windowsize, -+ settings->minmatch, settings->nicematch, settings->lazymatching); -+ if(error) break; -+ } -+ else -+ { -+ if(!uivector_resize(&lz77_encoded, datasize)) ERROR_BREAK(83 /*alloc fail*/); -+ for(i = datapos; i < dataend; ++i) lz77_encoded.data[i - datapos] = data[i]; /*no LZ77, but still will be Huffman compressed*/ -+ } -+ -+ if(!uivector_resizev(&frequencies_ll, 286, 0)) ERROR_BREAK(83 /*alloc fail*/); -+ if(!uivector_resizev(&frequencies_d, 30, 0)) ERROR_BREAK(83 /*alloc fail*/); -+ -+ /*Count the frequencies of lit, len and dist codes*/ -+ for(i = 0; i != lz77_encoded.size; ++i) -+ { -+ unsigned symbol = lz77_encoded.data[i]; -+ ++frequencies_ll.data[symbol]; -+ if(symbol > 256) -+ { -+ unsigned dist = lz77_encoded.data[i + 2]; -+ ++frequencies_d.data[dist]; -+ i += 3; -+ } -+ } -+ frequencies_ll.data[256] = 1; /*there will be exactly 1 end code, at the end of the block*/ -+ -+ /*Make both huffman trees, one for the lit and len codes, one for the dist codes*/ -+ error = HuffmanTree_makeFromFrequencies(&tree_ll, frequencies_ll.data, 257, frequencies_ll.size, 15); -+ if(error) break; -+ /*2, not 1, is chosen for mincodes: some buggy PNG decoders require at least 2 symbols in the dist tree*/ -+ error = HuffmanTree_makeFromFrequencies(&tree_d, frequencies_d.data, 2, frequencies_d.size, 15); -+ if(error) break; -+ -+ numcodes_ll = tree_ll.numcodes; if(numcodes_ll > 286) numcodes_ll = 286; -+ numcodes_d = tree_d.numcodes; if(numcodes_d > 30) numcodes_d = 30; -+ /*store the code lengths of both generated trees in bitlen_lld*/ -+ for(i = 0; i != numcodes_ll; ++i) uivector_push_back(&bitlen_lld, HuffmanTree_getLength(&tree_ll, (unsigned)i)); -+ for(i = 0; i != numcodes_d; ++i) uivector_push_back(&bitlen_lld, HuffmanTree_getLength(&tree_d, (unsigned)i)); -+ -+ /*run-length compress bitlen_ldd into bitlen_lld_e by using repeat codes 16 (copy length 3-6 times), -+ 17 (3-10 zeroes), 18 (11-138 zeroes)*/ -+ for(i = 0; i != (unsigned)bitlen_lld.size; ++i) -+ { -+ unsigned j = 0; /*amount of repititions*/ -+ while(i + j + 1 < (unsigned)bitlen_lld.size && bitlen_lld.data[i + j + 1] == bitlen_lld.data[i]) ++j; -+ -+ if(bitlen_lld.data[i] == 0 && j >= 2) /*repeat code for zeroes*/ -+ { -+ ++j; /*include the first zero*/ -+ if(j <= 10) /*repeat code 17 supports max 10 zeroes*/ -+ { -+ uivector_push_back(&bitlen_lld_e, 17); -+ uivector_push_back(&bitlen_lld_e, j - 3); -+ } -+ else /*repeat code 18 supports max 138 zeroes*/ -+ { -+ if(j > 138) j = 138; -+ uivector_push_back(&bitlen_lld_e, 18); -+ uivector_push_back(&bitlen_lld_e, j - 11); -+ } -+ i += (j - 1); -+ } -+ else if(j >= 3) /*repeat code for value other than zero*/ -+ { -+ size_t k; -+ unsigned num = j / 6, rest = j % 6; -+ uivector_push_back(&bitlen_lld_e, bitlen_lld.data[i]); -+ for(k = 0; k < num; ++k) -+ { -+ uivector_push_back(&bitlen_lld_e, 16); -+ uivector_push_back(&bitlen_lld_e, 6 - 3); -+ } -+ if(rest >= 3) -+ { -+ uivector_push_back(&bitlen_lld_e, 16); -+ uivector_push_back(&bitlen_lld_e, rest - 3); -+ } -+ else j -= rest; -+ i += j; -+ } -+ else /*too short to benefit from repeat code*/ -+ { -+ uivector_push_back(&bitlen_lld_e, bitlen_lld.data[i]); -+ } -+ } -+ -+ /*generate tree_cl, the huffmantree of huffmantrees*/ -+ -+ if(!uivector_resizev(&frequencies_cl, NUM_CODE_LENGTH_CODES, 0)) ERROR_BREAK(83 /*alloc fail*/); -+ for(i = 0; i != bitlen_lld_e.size; ++i) -+ { -+ ++frequencies_cl.data[bitlen_lld_e.data[i]]; -+ /*after a repeat code come the bits that specify the number of repetitions, -+ those don't need to be in the frequencies_cl calculation*/ -+ if(bitlen_lld_e.data[i] >= 16) ++i; -+ } -+ -+ error = HuffmanTree_makeFromFrequencies(&tree_cl, frequencies_cl.data, -+ frequencies_cl.size, frequencies_cl.size, 7); -+ if(error) break; -+ -+ if(!uivector_resize(&bitlen_cl, tree_cl.numcodes)) ERROR_BREAK(83 /*alloc fail*/); -+ for(i = 0; i != tree_cl.numcodes; ++i) -+ { -+ /*lenghts of code length tree is in the order as specified by deflate*/ -+ bitlen_cl.data[i] = HuffmanTree_getLength(&tree_cl, CLCL_ORDER[i]); -+ } -+ while(bitlen_cl.data[bitlen_cl.size - 1] == 0 && bitlen_cl.size > 4) -+ { -+ /*remove zeros at the end, but minimum size must be 4*/ -+ if(!uivector_resize(&bitlen_cl, bitlen_cl.size - 1)) ERROR_BREAK(83 /*alloc fail*/); -+ } -+ if(error) break; -+ -+ /* -+ Write everything into the output -+ -+ After the BFINAL and BTYPE, the dynamic block consists out of the following: -+ - 5 bits HLIT, 5 bits HDIST, 4 bits HCLEN -+ - (HCLEN+4)*3 bits code lengths of code length alphabet -+ - HLIT + 257 code lenghts of lit/length alphabet (encoded using the code length -+ alphabet, + possible repetition codes 16, 17, 18) -+ - HDIST + 1 code lengths of distance alphabet (encoded using the code length -+ alphabet, + possible repetition codes 16, 17, 18) -+ - compressed data -+ - 256 (end code) -+ */ -+ -+ /*Write block type*/ -+ addBitToStream(bp, out, BFINAL); -+ addBitToStream(bp, out, 0); /*first bit of BTYPE "dynamic"*/ -+ addBitToStream(bp, out, 1); /*second bit of BTYPE "dynamic"*/ -+ -+ /*write the HLIT, HDIST and HCLEN values*/ -+ HLIT = (unsigned)(numcodes_ll - 257); -+ HDIST = (unsigned)(numcodes_d - 1); -+ HCLEN = (unsigned)bitlen_cl.size - 4; -+ /*trim zeroes for HCLEN. HLIT and HDIST were already trimmed at tree creation*/ -+ while(!bitlen_cl.data[HCLEN + 4 - 1] && HCLEN > 0) --HCLEN; -+ addBitsToStream(bp, out, HLIT, 5); -+ addBitsToStream(bp, out, HDIST, 5); -+ addBitsToStream(bp, out, HCLEN, 4); -+ -+ /*write the code lenghts of the code length alphabet*/ -+ for(i = 0; i != HCLEN + 4; ++i) addBitsToStream(bp, out, bitlen_cl.data[i], 3); -+ -+ /*write the lenghts of the lit/len AND the dist alphabet*/ -+ for(i = 0; i != bitlen_lld_e.size; ++i) -+ { -+ addHuffmanSymbol(bp, out, HuffmanTree_getCode(&tree_cl, bitlen_lld_e.data[i]), -+ HuffmanTree_getLength(&tree_cl, bitlen_lld_e.data[i])); -+ /*extra bits of repeat codes*/ -+ if(bitlen_lld_e.data[i] == 16) addBitsToStream(bp, out, bitlen_lld_e.data[++i], 2); -+ else if(bitlen_lld_e.data[i] == 17) addBitsToStream(bp, out, bitlen_lld_e.data[++i], 3); -+ else if(bitlen_lld_e.data[i] == 18) addBitsToStream(bp, out, bitlen_lld_e.data[++i], 7); -+ } -+ -+ /*write the compressed data symbols*/ -+ writeLZ77data(bp, out, &lz77_encoded, &tree_ll, &tree_d); -+ /*error: the length of the end code 256 must be larger than 0*/ -+ if(HuffmanTree_getLength(&tree_ll, 256) == 0) ERROR_BREAK(64); -+ -+ /*write the end code*/ -+ addHuffmanSymbol(bp, out, HuffmanTree_getCode(&tree_ll, 256), HuffmanTree_getLength(&tree_ll, 256)); -+ -+ break; /*end of error-while*/ -+ } -+ -+ /*cleanup*/ -+ uivector_cleanup(&lz77_encoded); -+ HuffmanTree_cleanup(&tree_ll); -+ HuffmanTree_cleanup(&tree_d); -+ HuffmanTree_cleanup(&tree_cl); -+ uivector_cleanup(&frequencies_ll); -+ uivector_cleanup(&frequencies_d); -+ uivector_cleanup(&frequencies_cl); -+ uivector_cleanup(&bitlen_lld_e); -+ uivector_cleanup(&bitlen_lld); -+ uivector_cleanup(&bitlen_cl); -+ -+ return error; -+} -+ -+static unsigned deflateFixed(ucvector* out, size_t* bp, Hash* hash, -+ const unsigned char* data, -+ size_t datapos, size_t dataend, -+ const LodePNGCompressSettings* settings, unsigned final) -+{ -+ HuffmanTree tree_ll; /*tree for literal values and length codes*/ -+ HuffmanTree tree_d; /*tree for distance codes*/ -+ -+ unsigned BFINAL = final; -+ unsigned error = 0; -+ size_t i; -+ -+ HuffmanTree_init(&tree_ll); -+ HuffmanTree_init(&tree_d); -+ -+ generateFixedLitLenTree(&tree_ll); -+ generateFixedDistanceTree(&tree_d); -+ -+ addBitToStream(bp, out, BFINAL); -+ addBitToStream(bp, out, 1); /*first bit of BTYPE*/ -+ addBitToStream(bp, out, 0); /*second bit of BTYPE*/ -+ -+ if(settings->use_lz77) /*LZ77 encoded*/ -+ { -+ uivector lz77_encoded; -+ uivector_init(&lz77_encoded); -+ error = encodeLZ77(&lz77_encoded, hash, data, datapos, dataend, settings->windowsize, -+ settings->minmatch, settings->nicematch, settings->lazymatching); -+ if(!error) writeLZ77data(bp, out, &lz77_encoded, &tree_ll, &tree_d); -+ uivector_cleanup(&lz77_encoded); -+ } -+ else /*no LZ77, but still will be Huffman compressed*/ -+ { -+ for(i = datapos; i < dataend; ++i) -+ { -+ addHuffmanSymbol(bp, out, HuffmanTree_getCode(&tree_ll, data[i]), HuffmanTree_getLength(&tree_ll, data[i])); -+ } -+ } -+ /*add END code*/ -+ if(!error) addHuffmanSymbol(bp, out, HuffmanTree_getCode(&tree_ll, 256), HuffmanTree_getLength(&tree_ll, 256)); -+ -+ /*cleanup*/ -+ HuffmanTree_cleanup(&tree_ll); -+ HuffmanTree_cleanup(&tree_d); -+ -+ return error; -+} -+ -+static unsigned lodepng_deflatev(ucvector* out, const unsigned char* in, size_t insize, -+ const LodePNGCompressSettings* settings) -+{ -+ unsigned error = 0; -+ size_t i, blocksize, numdeflateblocks; -+ size_t bp = 0; /*the bit pointer*/ -+ Hash hash; -+ -+ if(settings->btype > 2) return 61; -+ else if(settings->btype == 0) return deflateNoCompression(out, in, insize); -+ else if(settings->btype == 1) blocksize = insize; -+ else /*if(settings->btype == 2)*/ -+ { -+ /*on PNGs, deflate blocks of 65-262k seem to give most dense encoding*/ -+ blocksize = insize / 8 + 8; -+ if(blocksize < 65536) blocksize = 65536; -+ if(blocksize > 262144) blocksize = 262144; -+ } -+ -+ numdeflateblocks = (insize + blocksize - 1) / blocksize; -+ if(numdeflateblocks == 0) numdeflateblocks = 1; -+ -+ error = hash_init(&hash, settings->windowsize); -+ if(error) return error; -+ -+ for(i = 0; i != numdeflateblocks && !error; ++i) -+ { -+ unsigned final = (i == numdeflateblocks - 1); -+ size_t start = i * blocksize; -+ size_t end = start + blocksize; -+ if(end > insize) end = insize; -+ -+ if(settings->btype == 1) error = deflateFixed(out, &bp, &hash, in, start, end, settings, final); -+ else if(settings->btype == 2) error = deflateDynamic(out, &bp, &hash, in, start, end, settings, final); -+ } -+ -+ hash_cleanup(&hash); -+ -+ return error; -+} -+ -+unsigned lodepng_deflate(unsigned char** out, size_t* outsize, -+ const unsigned char* in, size_t insize, -+ const LodePNGCompressSettings* settings) -+{ -+ unsigned error; -+ ucvector v; -+ ucvector_init_buffer(&v, *out, *outsize); -+ error = lodepng_deflatev(&v, in, insize, settings); -+ *out = v.data; -+ *outsize = v.size; -+ return error; -+} -+ -+static unsigned deflate(unsigned char** out, size_t* outsize, -+ const unsigned char* in, size_t insize, -+ const LodePNGCompressSettings* settings) -+{ -+ if(settings->custom_deflate) -+ { -+ return settings->custom_deflate(out, outsize, in, insize, settings); -+ } -+ else -+ { -+ return lodepng_deflate(out, outsize, in, insize, settings); -+ } -+} -+ -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* / Adler32 */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+static unsigned update_adler32(unsigned adler, const unsigned char* data, unsigned len) -+{ -+ unsigned s1 = adler & 0xffff; -+ unsigned s2 = (adler >> 16) & 0xffff; -+ -+ while(len > 0) -+ { -+ /*at least 5550 sums can be done before the sums overflow, saving a lot of module divisions*/ -+ unsigned amount = len > 5550 ? 5550 : len; -+ len -= amount; -+ while(amount > 0) -+ { -+ s1 += (*data++); -+ s2 += s1; -+ --amount; -+ } -+ s1 %= 65521; -+ s2 %= 65521; -+ } -+ -+ return (s2 << 16) | s1; -+} -+ -+/*Return the adler32 of the bytes data[0..len-1]*/ -+static unsigned adler32(const unsigned char* data, unsigned len) -+{ -+ return update_adler32(1L, data, len); -+} -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* / Zlib / */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+#ifdef LODEPNG_COMPILE_DECODER -+ -+unsigned lodepng_zlib_decompress(unsigned char** out, size_t* outsize, const unsigned char* in, -+ size_t insize, const LodePNGDecompressSettings* settings) -+{ -+ unsigned error = 0; -+ unsigned CM, CINFO, FDICT; -+ -+ if(insize < 2) return 53; /*error, size of zlib data too small*/ -+ /*read information from zlib header*/ -+ if((in[0] * 256 + in[1]) % 31 != 0) -+ { -+ /*error: 256 * in[0] + in[1] must be a multiple of 31, the FCHECK value is supposed to be made that way*/ -+ return 24; -+ } -+ -+ CM = in[0] & 15; -+ CINFO = (in[0] >> 4) & 15; -+ /*FCHECK = in[1] & 31;*/ /*FCHECK is already tested above*/ -+ FDICT = (in[1] >> 5) & 1; -+ /*FLEVEL = (in[1] >> 6) & 3;*/ /*FLEVEL is not used here*/ -+ -+ if(CM != 8 || CINFO > 7) -+ { -+ /*error: only compression method 8: inflate with sliding window of 32k is supported by the PNG spec*/ -+ return 25; -+ } -+ if(FDICT != 0) -+ { -+ /*error: the specification of PNG says about the zlib stream: -+ "The additional flags shall not specify a preset dictionary."*/ -+ return 26; -+ } -+ -+ error = inflate(out, outsize, in + 2, insize - 2, settings); -+ if(error) return error; -+ -+ if(!settings->ignore_adler32) -+ { -+ unsigned ADLER32 = lodepng_read32bitInt(&in[insize - 4]); -+ unsigned checksum = adler32(*out, (unsigned)(*outsize)); -+ if(checksum != ADLER32) return 58; /*error, adler checksum not correct, data must be corrupted*/ -+ } -+ -+ return 0; /*no error*/ -+} -+ -+static unsigned zlib_decompress(unsigned char** out, size_t* outsize, const unsigned char* in, -+ size_t insize, const LodePNGDecompressSettings* settings) -+{ -+ if(settings->custom_zlib) -+ { -+ return settings->custom_zlib(out, outsize, in, insize, settings); -+ } -+ else -+ { -+ return lodepng_zlib_decompress(out, outsize, in, insize, settings); -+ } -+} -+ -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+ -+unsigned lodepng_zlib_compress(unsigned char** out, size_t* outsize, const unsigned char* in, -+ size_t insize, const LodePNGCompressSettings* settings) -+{ -+ /*initially, *out must be NULL and outsize 0, if you just give some random *out -+ that's pointing to a non allocated buffer, this'll crash*/ -+ ucvector outv; -+ size_t i; -+ unsigned error; -+ unsigned char* deflatedata = 0; -+ size_t deflatesize = 0; -+ -+ /*zlib data: 1 byte CMF (CM+CINFO), 1 byte FLG, deflate data, 4 byte ADLER32 checksum of the Decompressed data*/ -+ unsigned CMF = 120; /*0b01111000: CM 8, CINFO 7. With CINFO 7, any window size up to 32768 can be used.*/ -+ unsigned FLEVEL = 0; -+ unsigned FDICT = 0; -+ unsigned CMFFLG = 256 * CMF + FDICT * 32 + FLEVEL * 64; -+ unsigned FCHECK = 31 - CMFFLG % 31; -+ CMFFLG += FCHECK; -+ -+ /*ucvector-controlled version of the output buffer, for dynamic array*/ -+ ucvector_init_buffer(&outv, *out, *outsize); -+ -+ ucvector_push_back(&outv, (unsigned char)(CMFFLG >> 8)); -+ ucvector_push_back(&outv, (unsigned char)(CMFFLG & 255)); -+ -+ error = deflate(&deflatedata, &deflatesize, in, insize, settings); -+ -+ if(!error) -+ { -+ unsigned ADLER32 = adler32(in, (unsigned)insize); -+ for(i = 0; i != deflatesize; ++i) ucvector_push_back(&outv, deflatedata[i]); -+ lodepng_free(deflatedata); -+ lodepng_add32bitInt(&outv, ADLER32); -+ } -+ -+ *out = outv.data; -+ *outsize = outv.size; -+ -+ return error; -+} -+ -+/* compress using the default or custom zlib function */ -+static unsigned zlib_compress(unsigned char** out, size_t* outsize, const unsigned char* in, -+ size_t insize, const LodePNGCompressSettings* settings) -+{ -+ if(settings->custom_zlib) -+ { -+ return settings->custom_zlib(out, outsize, in, insize, settings); -+ } -+ else -+ { -+ return lodepng_zlib_compress(out, outsize, in, insize, settings); -+ } -+} -+ -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ -+#else /*no LODEPNG_COMPILE_ZLIB*/ -+ -+#ifdef LODEPNG_COMPILE_DECODER -+static unsigned zlib_decompress(unsigned char** out, size_t* outsize, const unsigned char* in, -+ size_t insize, const LodePNGDecompressSettings* settings) -+{ -+ if(!settings->custom_zlib) return 87; /*no custom zlib function provided */ -+ return settings->custom_zlib(out, outsize, in, insize, settings); -+} -+#endif /*LODEPNG_COMPILE_DECODER*/ -+#ifdef LODEPNG_COMPILE_ENCODER -+static unsigned zlib_compress(unsigned char** out, size_t* outsize, const unsigned char* in, -+ size_t insize, const LodePNGCompressSettings* settings) -+{ -+ if(!settings->custom_zlib) return 87; /*no custom zlib function provided */ -+ return settings->custom_zlib(out, outsize, in, insize, settings); -+} -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ -+#endif /*LODEPNG_COMPILE_ZLIB*/ -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+ -+/*this is a good tradeoff between speed and compression ratio*/ -+#define DEFAULT_WINDOWSIZE 2048 -+ -+void lodepng_compress_settings_init(LodePNGCompressSettings* settings) -+{ -+ /*compress with dynamic huffman tree (not in the mathematical sense, just not the predefined one)*/ -+ settings->btype = 2; -+ settings->use_lz77 = 1; -+ settings->windowsize = DEFAULT_WINDOWSIZE; -+ settings->minmatch = 3; -+ settings->nicematch = 128; -+ settings->lazymatching = 1; -+ -+ settings->custom_zlib = 0; -+ settings->custom_deflate = 0; -+ settings->custom_context = 0; -+} -+ -+const LodePNGCompressSettings lodepng_default_compress_settings = {2, 1, DEFAULT_WINDOWSIZE, 3, 128, 1, 0, 0, 0}; -+ -+ -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ -+#ifdef LODEPNG_COMPILE_DECODER -+ -+void lodepng_decompress_settings_init(LodePNGDecompressSettings* settings) -+{ -+ settings->ignore_adler32 = 0; -+ -+ settings->custom_zlib = 0; -+ settings->custom_inflate = 0; -+ settings->custom_context = 0; -+} -+ -+const LodePNGDecompressSettings lodepng_default_decompress_settings = {0, 0, 0, 0}; -+ -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* // End of Zlib related code. Begin of PNG related code. // */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+#ifdef LODEPNG_COMPILE_PNG -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* / CRC32 / */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+ -+#ifndef LODEPNG_NO_COMPILE_CRC -+/* CRC polynomial: 0xedb88320 */ -+static unsigned lodepng_crc32_table[256] = { -+ 0u, 1996959894u, 3993919788u, 2567524794u, 124634137u, 1886057615u, 3915621685u, 2657392035u, -+ 249268274u, 2044508324u, 3772115230u, 2547177864u, 162941995u, 2125561021u, 3887607047u, 2428444049u, -+ 498536548u, 1789927666u, 4089016648u, 2227061214u, 450548861u, 1843258603u, 4107580753u, 2211677639u, -+ 325883990u, 1684777152u, 4251122042u, 2321926636u, 335633487u, 1661365465u, 4195302755u, 2366115317u, -+ 997073096u, 1281953886u, 3579855332u, 2724688242u, 1006888145u, 1258607687u, 3524101629u, 2768942443u, -+ 901097722u, 1119000684u, 3686517206u, 2898065728u, 853044451u, 1172266101u, 3705015759u, 2882616665u, -+ 651767980u, 1373503546u, 3369554304u, 3218104598u, 565507253u, 1454621731u, 3485111705u, 3099436303u, -+ 671266974u, 1594198024u, 3322730930u, 2970347812u, 795835527u, 1483230225u, 3244367275u, 3060149565u, -+ 1994146192u, 31158534u, 2563907772u, 4023717930u, 1907459465u, 112637215u, 2680153253u, 3904427059u, -+ 2013776290u, 251722036u, 2517215374u, 3775830040u, 2137656763u, 141376813u, 2439277719u, 3865271297u, -+ 1802195444u, 476864866u, 2238001368u, 4066508878u, 1812370925u, 453092731u, 2181625025u, 4111451223u, -+ 1706088902u, 314042704u, 2344532202u, 4240017532u, 1658658271u, 366619977u, 2362670323u, 4224994405u, -+ 1303535960u, 984961486u, 2747007092u, 3569037538u, 1256170817u, 1037604311u, 2765210733u, 3554079995u, -+ 1131014506u, 879679996u, 2909243462u, 3663771856u, 1141124467u, 855842277u, 2852801631u, 3708648649u, -+ 1342533948u, 654459306u, 3188396048u, 3373015174u, 1466479909u, 544179635u, 3110523913u, 3462522015u, -+ 1591671054u, 702138776u, 2966460450u, 3352799412u, 1504918807u, 783551873u, 3082640443u, 3233442989u, -+ 3988292384u, 2596254646u, 62317068u, 1957810842u, 3939845945u, 2647816111u, 81470997u, 1943803523u, -+ 3814918930u, 2489596804u, 225274430u, 2053790376u, 3826175755u, 2466906013u, 167816743u, 2097651377u, -+ 4027552580u, 2265490386u, 503444072u, 1762050814u, 4150417245u, 2154129355u, 426522225u, 1852507879u, -+ 4275313526u, 2312317920u, 282753626u, 1742555852u, 4189708143u, 2394877945u, 397917763u, 1622183637u, -+ 3604390888u, 2714866558u, 953729732u, 1340076626u, 3518719985u, 2797360999u, 1068828381u, 1219638859u, -+ 3624741850u, 2936675148u, 906185462u, 1090812512u, 3747672003u, 2825379669u, 829329135u, 1181335161u, -+ 3412177804u, 3160834842u, 628085408u, 1382605366u, 3423369109u, 3138078467u, 570562233u, 1426400815u, -+ 3317316542u, 2998733608u, 733239954u, 1555261956u, 3268935591u, 3050360625u, 752459403u, 1541320221u, -+ 2607071920u, 3965973030u, 1969922972u, 40735498u, 2617837225u, 3943577151u, 1913087877u, 83908371u, -+ 2512341634u, 3803740692u, 2075208622u, 213261112u, 2463272603u, 3855990285u, 2094854071u, 198958881u, -+ 2262029012u, 4057260610u, 1759359992u, 534414190u, 2176718541u, 4139329115u, 1873836001u, 414664567u, -+ 2282248934u, 4279200368u, 1711684554u, 285281116u, 2405801727u, 4167216745u, 1634467795u, 376229701u, -+ 2685067896u, 3608007406u, 1308918612u, 956543938u, 2808555105u, 3495958263u, 1231636301u, 1047427035u, -+ 2932959818u, 3654703836u, 1088359270u, 936918000u, 2847714899u, 3736837829u, 1202900863u, 817233897u, -+ 3183342108u, 3401237130u, 1404277552u, 615818150u, 3134207493u, 3453421203u, 1423857449u, 601450431u, -+ 3009837614u, 3294710456u, 1567103746u, 711928724u, 3020668471u, 3272380065u, 1510334235u, 755167117u -+}; -+ -+/*Return the CRC of the bytes buf[0..len-1].*/ -+unsigned lodepng_crc32(const unsigned char* data, size_t length) -+{ -+ unsigned r = 0xffffffffu; -+ size_t i; -+ for(i = 0; i < length; ++i) -+ { -+ r = lodepng_crc32_table[(r ^ data[i]) & 0xff] ^ (r >> 8); -+ } -+ return r ^ 0xffffffffu; -+} -+#else /* !LODEPNG_NO_COMPILE_CRC */ -+unsigned lodepng_crc32(const unsigned char* data, size_t length); -+#endif /* !LODEPNG_NO_COMPILE_CRC */ -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* / Reading and writing single bits and bytes from/to stream for LodePNG / */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+static unsigned char readBitFromReversedStream(size_t* bitpointer, const unsigned char* bitstream) -+{ -+ unsigned char result = (unsigned char)((bitstream[(*bitpointer) >> 3] >> (7 - ((*bitpointer) & 0x7))) & 1); -+ ++(*bitpointer); -+ return result; -+} -+ -+static unsigned readBitsFromReversedStream(size_t* bitpointer, const unsigned char* bitstream, size_t nbits) -+{ -+ unsigned result = 0; -+ size_t i; -+ for(i = nbits - 1; i < nbits; --i) -+ { -+ result += (unsigned)readBitFromReversedStream(bitpointer, bitstream) << i; -+ } -+ return result; -+} -+ -+#ifdef LODEPNG_COMPILE_DECODER -+static void setBitOfReversedStream0(size_t* bitpointer, unsigned char* bitstream, unsigned char bit) -+{ -+ /*the current bit in bitstream must be 0 for this to work*/ -+ if(bit) -+ { -+ /*earlier bit of huffman code is in a lesser significant bit of an earlier byte*/ -+ bitstream[(*bitpointer) >> 3] |= (bit << (7 - ((*bitpointer) & 0x7))); -+ } -+ ++(*bitpointer); -+} -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+static void setBitOfReversedStream(size_t* bitpointer, unsigned char* bitstream, unsigned char bit) -+{ -+ /*the current bit in bitstream may be 0 or 1 for this to work*/ -+ if(bit == 0) bitstream[(*bitpointer) >> 3] &= (unsigned char)(~(1 << (7 - ((*bitpointer) & 0x7)))); -+ else bitstream[(*bitpointer) >> 3] |= (1 << (7 - ((*bitpointer) & 0x7))); -+ ++(*bitpointer); -+} -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* / PNG chunks / */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+unsigned lodepng_chunk_length(const unsigned char* chunk) -+{ -+ return lodepng_read32bitInt(&chunk[0]); -+} -+ -+void lodepng_chunk_type(char type[5], const unsigned char* chunk) -+{ -+ unsigned i; -+ for(i = 0; i != 4; ++i) type[i] = (char)chunk[4 + i]; -+ type[4] = 0; /*null termination char*/ -+} -+ -+unsigned char lodepng_chunk_type_equals(const unsigned char* chunk, const char* type) -+{ -+ if(strlen(type) != 4) return 0; -+ return (chunk[4] == type[0] && chunk[5] == type[1] && chunk[6] == type[2] && chunk[7] == type[3]); -+} -+ -+unsigned char lodepng_chunk_ancillary(const unsigned char* chunk) -+{ -+ return((chunk[4] & 32) != 0); -+} -+ -+unsigned char lodepng_chunk_private(const unsigned char* chunk) -+{ -+ return((chunk[6] & 32) != 0); -+} -+ -+unsigned char lodepng_chunk_safetocopy(const unsigned char* chunk) -+{ -+ return((chunk[7] & 32) != 0); -+} -+ -+unsigned char* lodepng_chunk_data(unsigned char* chunk) -+{ -+ return &chunk[8]; -+} -+ -+const unsigned char* lodepng_chunk_data_const(const unsigned char* chunk) -+{ -+ return &chunk[8]; -+} -+ -+unsigned lodepng_chunk_check_crc(const unsigned char* chunk) -+{ -+ unsigned length = lodepng_chunk_length(chunk); -+ unsigned CRC = lodepng_read32bitInt(&chunk[length + 8]); -+ /*the CRC is taken of the data and the 4 chunk type letters, not the length*/ -+ unsigned checksum = lodepng_crc32(&chunk[4], length + 4); -+ if(CRC != checksum) return 1; -+ else return 0; -+} -+ -+void lodepng_chunk_generate_crc(unsigned char* chunk) -+{ -+ unsigned length = lodepng_chunk_length(chunk); -+ unsigned CRC = lodepng_crc32(&chunk[4], length + 4); -+ lodepng_set32bitInt(chunk + 8 + length, CRC); -+} -+ -+unsigned char* lodepng_chunk_next(unsigned char* chunk) -+{ -+ unsigned total_chunk_length = lodepng_chunk_length(chunk) + 12; -+ return &chunk[total_chunk_length]; -+} -+ -+const unsigned char* lodepng_chunk_next_const(const unsigned char* chunk) -+{ -+ unsigned total_chunk_length = lodepng_chunk_length(chunk) + 12; -+ return &chunk[total_chunk_length]; -+} -+ -+unsigned lodepng_chunk_append(unsigned char** out, size_t* outlength, const unsigned char* chunk) -+{ -+ unsigned i; -+ unsigned total_chunk_length = lodepng_chunk_length(chunk) + 12; -+ unsigned char *chunk_start, *new_buffer; -+ size_t new_length = (*outlength) + total_chunk_length; -+ if(new_length < total_chunk_length || new_length < (*outlength)) return 77; /*integer overflow happened*/ -+ -+ new_buffer = (unsigned char*)lodepng_realloc(*out, new_length); -+ if(!new_buffer) return 83; /*alloc fail*/ -+ (*out) = new_buffer; -+ (*outlength) = new_length; -+ chunk_start = &(*out)[new_length - total_chunk_length]; -+ -+ for(i = 0; i != total_chunk_length; ++i) chunk_start[i] = chunk[i]; -+ -+ return 0; -+} -+ -+unsigned lodepng_chunk_create(unsigned char** out, size_t* outlength, unsigned length, -+ const char* type, const unsigned char* data) -+{ -+ unsigned i; -+ unsigned char *chunk, *new_buffer; -+ size_t new_length = (*outlength) + length + 12; -+ if(new_length < length + 12 || new_length < (*outlength)) return 77; /*integer overflow happened*/ -+ new_buffer = (unsigned char*)lodepng_realloc(*out, new_length); -+ if(!new_buffer) return 83; /*alloc fail*/ -+ (*out) = new_buffer; -+ (*outlength) = new_length; -+ chunk = &(*out)[(*outlength) - length - 12]; -+ -+ /*1: length*/ -+ lodepng_set32bitInt(chunk, (unsigned)length); -+ -+ /*2: chunk name (4 letters)*/ -+ chunk[4] = (unsigned char)type[0]; -+ chunk[5] = (unsigned char)type[1]; -+ chunk[6] = (unsigned char)type[2]; -+ chunk[7] = (unsigned char)type[3]; -+ -+ /*3: the data*/ -+ for(i = 0; i != length; ++i) chunk[8 + i] = data[i]; -+ -+ /*4: CRC (of the chunkname characters and the data)*/ -+ lodepng_chunk_generate_crc(chunk); -+ -+ return 0; -+} -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* / Color types and such / */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+/*return type is a LodePNG error code*/ -+static unsigned checkColorValidity(LodePNGColorType colortype, unsigned bd) /*bd = bitdepth*/ -+{ -+ switch(colortype) -+ { -+ case 0: if(!(bd == 1 || bd == 2 || bd == 4 || bd == 8 || bd == 16)) return 37; break; /*grey*/ -+ case 2: if(!( bd == 8 || bd == 16)) return 37; break; /*RGB*/ -+ case 3: if(!(bd == 1 || bd == 2 || bd == 4 || bd == 8 )) return 37; break; /*palette*/ -+ case 4: if(!( bd == 8 || bd == 16)) return 37; break; /*grey + alpha*/ -+ case 6: if(!( bd == 8 || bd == 16)) return 37; break; /*RGBA*/ -+ default: return 31; -+ } -+ return 0; /*allowed color type / bits combination*/ -+} -+ -+static unsigned getNumColorChannels(LodePNGColorType colortype) -+{ -+ switch(colortype) -+ { -+ case 0: return 1; /*grey*/ -+ case 2: return 3; /*RGB*/ -+ case 3: return 1; /*palette*/ -+ case 4: return 2; /*grey + alpha*/ -+ case 6: return 4; /*RGBA*/ -+ } -+ return 0; /*unexisting color type*/ -+} -+ -+static unsigned lodepng_get_bpp_lct(LodePNGColorType colortype, unsigned bitdepth) -+{ -+ /*bits per pixel is amount of channels * bits per channel*/ -+ return getNumColorChannels(colortype) * bitdepth; -+} -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+void lodepng_color_mode_init(LodePNGColorMode* info) -+{ -+ info->key_defined = 0; -+ info->key_r = info->key_g = info->key_b = 0; -+ info->colortype = LCT_RGBA; -+ info->bitdepth = 8; -+ info->palette = 0; -+ info->palettesize = 0; -+} -+ -+void lodepng_color_mode_cleanup(LodePNGColorMode* info) -+{ -+ lodepng_palette_clear(info); -+} -+ -+unsigned lodepng_color_mode_copy(LodePNGColorMode* dest, const LodePNGColorMode* source) -+{ -+ size_t i; -+ lodepng_color_mode_cleanup(dest); -+ *dest = *source; -+ if(source->palette) -+ { -+ dest->palette = (unsigned char*)lodepng_malloc(1024); -+ if(!dest->palette && source->palettesize) return 83; /*alloc fail*/ -+ for(i = 0; i != source->palettesize * 4; ++i) dest->palette[i] = source->palette[i]; -+ } -+ return 0; -+} -+ -+static int lodepng_color_mode_equal(const LodePNGColorMode* a, const LodePNGColorMode* b) -+{ -+ size_t i; -+ if(a->colortype != b->colortype) return 0; -+ if(a->bitdepth != b->bitdepth) return 0; -+ if(a->key_defined != b->key_defined) return 0; -+ if(a->key_defined) -+ { -+ if(a->key_r != b->key_r) return 0; -+ if(a->key_g != b->key_g) return 0; -+ if(a->key_b != b->key_b) return 0; -+ } -+ /*if one of the palette sizes is 0, then we consider it to be the same as the -+ other: it means that e.g. the palette was not given by the user and should be -+ considered the same as the palette inside the PNG.*/ -+ if(1/*a->palettesize != 0 && b->palettesize != 0*/) { -+ if(a->palettesize != b->palettesize) return 0; -+ for(i = 0; i != a->palettesize * 4; ++i) -+ { -+ if(a->palette[i] != b->palette[i]) return 0; -+ } -+ } -+ return 1; -+} -+ -+void lodepng_palette_clear(LodePNGColorMode* info) -+{ -+ if(info->palette) lodepng_free(info->palette); -+ info->palette = 0; -+ info->palettesize = 0; -+} -+ -+unsigned lodepng_palette_add(LodePNGColorMode* info, -+ unsigned char r, unsigned char g, unsigned char b, unsigned char a) -+{ -+ unsigned char* data; -+ /*the same resize technique as C++ std::vectors is used, and here it's made so that for a palette with -+ the max of 256 colors, it'll have the exact alloc size*/ -+ if(!info->palette) /*allocate palette if empty*/ -+ { -+ /*room for 256 colors with 4 bytes each*/ -+ data = (unsigned char*)lodepng_realloc(info->palette, 1024); -+ if(!data) return 83; /*alloc fail*/ -+ else info->palette = data; -+ } -+ info->palette[4 * info->palettesize + 0] = r; -+ info->palette[4 * info->palettesize + 1] = g; -+ info->palette[4 * info->palettesize + 2] = b; -+ info->palette[4 * info->palettesize + 3] = a; -+ ++info->palettesize; -+ return 0; -+} -+ -+unsigned lodepng_get_bpp(const LodePNGColorMode* info) -+{ -+ /*calculate bits per pixel out of colortype and bitdepth*/ -+ return lodepng_get_bpp_lct(info->colortype, info->bitdepth); -+} -+ -+unsigned lodepng_get_channels(const LodePNGColorMode* info) -+{ -+ return getNumColorChannels(info->colortype); -+} -+ -+unsigned lodepng_is_greyscale_type(const LodePNGColorMode* info) -+{ -+ return info->colortype == LCT_GREY || info->colortype == LCT_GREY_ALPHA; -+} -+ -+unsigned lodepng_is_alpha_type(const LodePNGColorMode* info) -+{ -+ return (info->colortype & 4) != 0; /*4 or 6*/ -+} -+ -+unsigned lodepng_is_palette_type(const LodePNGColorMode* info) -+{ -+ return info->colortype == LCT_PALETTE; -+} -+ -+unsigned lodepng_has_palette_alpha(const LodePNGColorMode* info) -+{ -+ size_t i; -+ for(i = 0; i != info->palettesize; ++i) -+ { -+ if(info->palette[i * 4 + 3] < 255) return 1; -+ } -+ return 0; -+} -+ -+unsigned lodepng_can_have_alpha(const LodePNGColorMode* info) -+{ -+ return info->key_defined -+ || lodepng_is_alpha_type(info) -+ || lodepng_has_palette_alpha(info); -+} -+ -+size_t lodepng_get_raw_size(unsigned w, unsigned h, const LodePNGColorMode* color) -+{ -+ /*will not overflow for any color type if roughly w * h < 268435455*/ -+ size_t bpp = lodepng_get_bpp(color); -+ size_t n = w * h; -+ return ((n / 8) * bpp) + ((n & 7) * bpp + 7) / 8; -+} -+ -+size_t lodepng_get_raw_size_lct(unsigned w, unsigned h, LodePNGColorType colortype, unsigned bitdepth) -+{ -+ /*will not overflow for any color type if roughly w * h < 268435455*/ -+ size_t bpp = lodepng_get_bpp_lct(colortype, bitdepth); -+ size_t n = w * h; -+ return ((n / 8) * bpp) + ((n & 7) * bpp + 7) / 8; -+} -+ -+ -+#ifdef LODEPNG_COMPILE_PNG -+#ifdef LODEPNG_COMPILE_DECODER -+/*in an idat chunk, each scanline is a multiple of 8 bits, unlike the lodepng output buffer*/ -+static size_t lodepng_get_raw_size_idat(unsigned w, unsigned h, const LodePNGColorMode* color) -+{ -+ /*will not overflow for any color type if roughly w * h < 268435455*/ -+ size_t bpp = lodepng_get_bpp(color); -+ size_t line = ((w / 8) * bpp) + ((w & 7) * bpp + 7) / 8; -+ return h * line; -+} -+#endif /*LODEPNG_COMPILE_DECODER*/ -+#endif /*LODEPNG_COMPILE_PNG*/ -+ -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ -+static void LodePNGUnknownChunks_init(LodePNGInfo* info) -+{ -+ unsigned i; -+ for(i = 0; i != 3; ++i) info->unknown_chunks_data[i] = 0; -+ for(i = 0; i != 3; ++i) info->unknown_chunks_size[i] = 0; -+} -+ -+static void LodePNGUnknownChunks_cleanup(LodePNGInfo* info) -+{ -+ unsigned i; -+ for(i = 0; i != 3; ++i) lodepng_free(info->unknown_chunks_data[i]); -+} -+ -+static unsigned LodePNGUnknownChunks_copy(LodePNGInfo* dest, const LodePNGInfo* src) -+{ -+ unsigned i; -+ -+ LodePNGUnknownChunks_cleanup(dest); -+ -+ for(i = 0; i != 3; ++i) -+ { -+ size_t j; -+ dest->unknown_chunks_size[i] = src->unknown_chunks_size[i]; -+ dest->unknown_chunks_data[i] = (unsigned char*)lodepng_malloc(src->unknown_chunks_size[i]); -+ if(!dest->unknown_chunks_data[i] && dest->unknown_chunks_size[i]) return 83; /*alloc fail*/ -+ for(j = 0; j < src->unknown_chunks_size[i]; ++j) -+ { -+ dest->unknown_chunks_data[i][j] = src->unknown_chunks_data[i][j]; -+ } -+ } -+ -+ return 0; -+} -+ -+/******************************************************************************/ -+ -+static void LodePNGText_init(LodePNGInfo* info) -+{ -+ info->text_num = 0; -+ info->text_keys = NULL; -+ info->text_strings = NULL; -+} -+ -+static void LodePNGText_cleanup(LodePNGInfo* info) -+{ -+ size_t i; -+ for(i = 0; i != info->text_num; ++i) -+ { -+ string_cleanup(&info->text_keys[i]); -+ string_cleanup(&info->text_strings[i]); -+ } -+ lodepng_free(info->text_keys); -+ lodepng_free(info->text_strings); -+} -+ -+static unsigned LodePNGText_copy(LodePNGInfo* dest, const LodePNGInfo* source) -+{ -+ size_t i = 0; -+ dest->text_keys = 0; -+ dest->text_strings = 0; -+ dest->text_num = 0; -+ for(i = 0; i != source->text_num; ++i) -+ { -+ CERROR_TRY_RETURN(lodepng_add_text(dest, source->text_keys[i], source->text_strings[i])); -+ } -+ return 0; -+} -+ -+void lodepng_clear_text(LodePNGInfo* info) -+{ -+ LodePNGText_cleanup(info); -+} -+ -+unsigned lodepng_add_text(LodePNGInfo* info, const char* key, const char* str) -+{ -+ char** new_keys = (char**)(lodepng_realloc(info->text_keys, sizeof(char*) * (info->text_num + 1))); -+ char** new_strings = (char**)(lodepng_realloc(info->text_strings, sizeof(char*) * (info->text_num + 1))); -+ if(!new_keys || !new_strings) -+ { -+ lodepng_free(new_keys); -+ lodepng_free(new_strings); -+ return 83; /*alloc fail*/ -+ } -+ -+ ++info->text_num; -+ info->text_keys = new_keys; -+ info->text_strings = new_strings; -+ -+ string_init(&info->text_keys[info->text_num - 1]); -+ string_set(&info->text_keys[info->text_num - 1], key); -+ -+ string_init(&info->text_strings[info->text_num - 1]); -+ string_set(&info->text_strings[info->text_num - 1], str); -+ -+ return 0; -+} -+ -+/******************************************************************************/ -+ -+static void LodePNGIText_init(LodePNGInfo* info) -+{ -+ info->itext_num = 0; -+ info->itext_keys = NULL; -+ info->itext_langtags = NULL; -+ info->itext_transkeys = NULL; -+ info->itext_strings = NULL; -+} -+ -+static void LodePNGIText_cleanup(LodePNGInfo* info) -+{ -+ size_t i; -+ for(i = 0; i != info->itext_num; ++i) -+ { -+ string_cleanup(&info->itext_keys[i]); -+ string_cleanup(&info->itext_langtags[i]); -+ string_cleanup(&info->itext_transkeys[i]); -+ string_cleanup(&info->itext_strings[i]); -+ } -+ lodepng_free(info->itext_keys); -+ lodepng_free(info->itext_langtags); -+ lodepng_free(info->itext_transkeys); -+ lodepng_free(info->itext_strings); -+} -+ -+static unsigned LodePNGIText_copy(LodePNGInfo* dest, const LodePNGInfo* source) -+{ -+ size_t i = 0; -+ dest->itext_keys = 0; -+ dest->itext_langtags = 0; -+ dest->itext_transkeys = 0; -+ dest->itext_strings = 0; -+ dest->itext_num = 0; -+ for(i = 0; i != source->itext_num; ++i) -+ { -+ CERROR_TRY_RETURN(lodepng_add_itext(dest, source->itext_keys[i], source->itext_langtags[i], -+ source->itext_transkeys[i], source->itext_strings[i])); -+ } -+ return 0; -+} -+ -+void lodepng_clear_itext(LodePNGInfo* info) -+{ -+ LodePNGIText_cleanup(info); -+} -+ -+unsigned lodepng_add_itext(LodePNGInfo* info, const char* key, const char* langtag, -+ const char* transkey, const char* str) -+{ -+ char** new_keys = (char**)(lodepng_realloc(info->itext_keys, sizeof(char*) * (info->itext_num + 1))); -+ char** new_langtags = (char**)(lodepng_realloc(info->itext_langtags, sizeof(char*) * (info->itext_num + 1))); -+ char** new_transkeys = (char**)(lodepng_realloc(info->itext_transkeys, sizeof(char*) * (info->itext_num + 1))); -+ char** new_strings = (char**)(lodepng_realloc(info->itext_strings, sizeof(char*) * (info->itext_num + 1))); -+ if(!new_keys || !new_langtags || !new_transkeys || !new_strings) -+ { -+ lodepng_free(new_keys); -+ lodepng_free(new_langtags); -+ lodepng_free(new_transkeys); -+ lodepng_free(new_strings); -+ return 83; /*alloc fail*/ -+ } -+ -+ ++info->itext_num; -+ info->itext_keys = new_keys; -+ info->itext_langtags = new_langtags; -+ info->itext_transkeys = new_transkeys; -+ info->itext_strings = new_strings; -+ -+ string_init(&info->itext_keys[info->itext_num - 1]); -+ string_set(&info->itext_keys[info->itext_num - 1], key); -+ -+ string_init(&info->itext_langtags[info->itext_num - 1]); -+ string_set(&info->itext_langtags[info->itext_num - 1], langtag); -+ -+ string_init(&info->itext_transkeys[info->itext_num - 1]); -+ string_set(&info->itext_transkeys[info->itext_num - 1], transkey); -+ -+ string_init(&info->itext_strings[info->itext_num - 1]); -+ string_set(&info->itext_strings[info->itext_num - 1], str); -+ -+ return 0; -+} -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ -+void lodepng_info_init(LodePNGInfo* info) -+{ -+ lodepng_color_mode_init(&info->color); -+ info->interlace_method = 0; -+ info->compression_method = 0; -+ info->filter_method = 0; -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ info->background_defined = 0; -+ info->background_r = info->background_g = info->background_b = 0; -+ -+ LodePNGText_init(info); -+ LodePNGIText_init(info); -+ -+ info->time_defined = 0; -+ info->phys_defined = 0; -+ -+ LodePNGUnknownChunks_init(info); -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+} -+ -+void lodepng_info_cleanup(LodePNGInfo* info) -+{ -+ lodepng_color_mode_cleanup(&info->color); -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ LodePNGText_cleanup(info); -+ LodePNGIText_cleanup(info); -+ -+ LodePNGUnknownChunks_cleanup(info); -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+} -+ -+unsigned lodepng_info_copy(LodePNGInfo* dest, const LodePNGInfo* source) -+{ -+ lodepng_info_cleanup(dest); -+ *dest = *source; -+ lodepng_color_mode_init(&dest->color); -+ CERROR_TRY_RETURN(lodepng_color_mode_copy(&dest->color, &source->color)); -+ -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ CERROR_TRY_RETURN(LodePNGText_copy(dest, source)); -+ CERROR_TRY_RETURN(LodePNGIText_copy(dest, source)); -+ -+ LodePNGUnknownChunks_init(dest); -+ CERROR_TRY_RETURN(LodePNGUnknownChunks_copy(dest, source)); -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ return 0; -+} -+ -+void lodepng_info_swap(LodePNGInfo* a, LodePNGInfo* b) -+{ -+ LodePNGInfo temp = *a; -+ *a = *b; -+ *b = temp; -+} -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+/*index: bitgroup index, bits: bitgroup size(1, 2 or 4), in: bitgroup value, out: octet array to add bits to*/ -+static void addColorBits(unsigned char* out, size_t index, unsigned bits, unsigned in) -+{ -+ unsigned m = bits == 1 ? 7 : bits == 2 ? 3 : 1; /*8 / bits - 1*/ -+ /*p = the partial index in the byte, e.g. with 4 palettebits it is 0 for first half or 1 for second half*/ -+ unsigned p = index & m; -+ in &= (1u << bits) - 1u; /*filter out any other bits of the input value*/ -+ in = in << (bits * (m - p)); -+ if(p == 0) out[index * bits / 8] = in; -+ else out[index * bits / 8] |= in; -+} -+ -+typedef struct ColorTree ColorTree; -+ -+/* -+One node of a color tree -+This is the data structure used to count the number of unique colors and to get a palette -+index for a color. It's like an octree, but because the alpha channel is used too, each -+node has 16 instead of 8 children. -+*/ -+struct ColorTree -+{ -+ ColorTree* children[16]; /*up to 16 pointers to ColorTree of next level*/ -+ int index; /*the payload. Only has a meaningful value if this is in the last level*/ -+}; -+ -+static void color_tree_init(ColorTree* tree) -+{ -+ int i; -+ for(i = 0; i != 16; ++i) tree->children[i] = 0; -+ tree->index = -1; -+} -+ -+static void color_tree_cleanup(ColorTree* tree) -+{ -+ int i; -+ for(i = 0; i != 16; ++i) -+ { -+ if(tree->children[i]) -+ { -+ color_tree_cleanup(tree->children[i]); -+ lodepng_free(tree->children[i]); -+ } -+ } -+} -+ -+/*returns -1 if color not present, its index otherwise*/ -+static int color_tree_get(ColorTree* tree, unsigned char r, unsigned char g, unsigned char b, unsigned char a) -+{ -+ int bit = 0; -+ for(bit = 0; bit < 8; ++bit) -+ { -+ int i = 8 * ((r >> bit) & 1) + 4 * ((g >> bit) & 1) + 2 * ((b >> bit) & 1) + 1 * ((a >> bit) & 1); -+ if(!tree->children[i]) return -1; -+ else tree = tree->children[i]; -+ } -+ return tree ? tree->index : -1; -+} -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+static int color_tree_has(ColorTree* tree, unsigned char r, unsigned char g, unsigned char b, unsigned char a) -+{ -+ return color_tree_get(tree, r, g, b, a) >= 0; -+} -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ -+/*color is not allowed to already exist. -+Index should be >= 0 (it's signed to be compatible with using -1 for "doesn't exist")*/ -+static void color_tree_add(ColorTree* tree, -+ unsigned char r, unsigned char g, unsigned char b, unsigned char a, unsigned index) -+{ -+ int bit; -+ for(bit = 0; bit < 8; ++bit) -+ { -+ int i = 8 * ((r >> bit) & 1) + 4 * ((g >> bit) & 1) + 2 * ((b >> bit) & 1) + 1 * ((a >> bit) & 1); -+ if(!tree->children[i]) -+ { -+ tree->children[i] = (ColorTree*)lodepng_malloc(sizeof(ColorTree)); -+ color_tree_init(tree->children[i]); -+ } -+ tree = tree->children[i]; -+ } -+ tree->index = (int)index; -+} -+ -+/*put a pixel, given its RGBA color, into image of any color type*/ -+static unsigned rgba8ToPixel(unsigned char* out, size_t i, -+ const LodePNGColorMode* mode, ColorTree* tree /*for palette*/, -+ unsigned char r, unsigned char g, unsigned char b, unsigned char a) -+{ -+ if(mode->colortype == LCT_GREY) -+ { -+ unsigned char grey = r; /*((unsigned short)r + g + b) / 3*/; -+ if(mode->bitdepth == 8) out[i] = grey; -+ else if(mode->bitdepth == 16) out[i * 2 + 0] = out[i * 2 + 1] = grey; -+ else -+ { -+ /*take the most significant bits of grey*/ -+ grey = (grey >> (8 - mode->bitdepth)) & ((1 << mode->bitdepth) - 1); -+ addColorBits(out, i, mode->bitdepth, grey); -+ } -+ } -+ else if(mode->colortype == LCT_RGB) -+ { -+ if(mode->bitdepth == 8) -+ { -+ out[i * 3 + 0] = r; -+ out[i * 3 + 1] = g; -+ out[i * 3 + 2] = b; -+ } -+ else -+ { -+ out[i * 6 + 0] = out[i * 6 + 1] = r; -+ out[i * 6 + 2] = out[i * 6 + 3] = g; -+ out[i * 6 + 4] = out[i * 6 + 5] = b; -+ } -+ } -+ else if(mode->colortype == LCT_PALETTE) -+ { -+ int index = color_tree_get(tree, r, g, b, a); -+ if(index < 0) return 82; /*color not in palette*/ -+ if(mode->bitdepth == 8) out[i] = index; -+ else addColorBits(out, i, mode->bitdepth, (unsigned)index); -+ } -+ else if(mode->colortype == LCT_GREY_ALPHA) -+ { -+ unsigned char grey = r; /*((unsigned short)r + g + b) / 3*/; -+ if(mode->bitdepth == 8) -+ { -+ out[i * 2 + 0] = grey; -+ out[i * 2 + 1] = a; -+ } -+ else if(mode->bitdepth == 16) -+ { -+ out[i * 4 + 0] = out[i * 4 + 1] = grey; -+ out[i * 4 + 2] = out[i * 4 + 3] = a; -+ } -+ } -+ else if(mode->colortype == LCT_RGBA) -+ { -+ if(mode->bitdepth == 8) -+ { -+ out[i * 4 + 0] = r; -+ out[i * 4 + 1] = g; -+ out[i * 4 + 2] = b; -+ out[i * 4 + 3] = a; -+ } -+ else -+ { -+ out[i * 8 + 0] = out[i * 8 + 1] = r; -+ out[i * 8 + 2] = out[i * 8 + 3] = g; -+ out[i * 8 + 4] = out[i * 8 + 5] = b; -+ out[i * 8 + 6] = out[i * 8 + 7] = a; -+ } -+ } -+ -+ return 0; /*no error*/ -+} -+ -+/*put a pixel, given its RGBA16 color, into image of any color 16-bitdepth type*/ -+static void rgba16ToPixel(unsigned char* out, size_t i, -+ const LodePNGColorMode* mode, -+ unsigned short r, unsigned short g, unsigned short b, unsigned short a) -+{ -+ if(mode->colortype == LCT_GREY) -+ { -+ unsigned short grey = r; /*((unsigned)r + g + b) / 3*/; -+ out[i * 2 + 0] = (grey >> 8) & 255; -+ out[i * 2 + 1] = grey & 255; -+ } -+ else if(mode->colortype == LCT_RGB) -+ { -+ out[i * 6 + 0] = (r >> 8) & 255; -+ out[i * 6 + 1] = r & 255; -+ out[i * 6 + 2] = (g >> 8) & 255; -+ out[i * 6 + 3] = g & 255; -+ out[i * 6 + 4] = (b >> 8) & 255; -+ out[i * 6 + 5] = b & 255; -+ } -+ else if(mode->colortype == LCT_GREY_ALPHA) -+ { -+ unsigned short grey = r; /*((unsigned)r + g + b) / 3*/; -+ out[i * 4 + 0] = (grey >> 8) & 255; -+ out[i * 4 + 1] = grey & 255; -+ out[i * 4 + 2] = (a >> 8) & 255; -+ out[i * 4 + 3] = a & 255; -+ } -+ else if(mode->colortype == LCT_RGBA) -+ { -+ out[i * 8 + 0] = (r >> 8) & 255; -+ out[i * 8 + 1] = r & 255; -+ out[i * 8 + 2] = (g >> 8) & 255; -+ out[i * 8 + 3] = g & 255; -+ out[i * 8 + 4] = (b >> 8) & 255; -+ out[i * 8 + 5] = b & 255; -+ out[i * 8 + 6] = (a >> 8) & 255; -+ out[i * 8 + 7] = a & 255; -+ } -+} -+ -+/*Get RGBA8 color of pixel with index i (y * width + x) from the raw image with given color type.*/ -+static void getPixelColorRGBA8(unsigned char* r, unsigned char* g, -+ unsigned char* b, unsigned char* a, -+ const unsigned char* in, size_t i, -+ const LodePNGColorMode* mode) -+{ -+ if(mode->colortype == LCT_GREY) -+ { -+ if(mode->bitdepth == 8) -+ { -+ *r = *g = *b = in[i]; -+ if(mode->key_defined && *r == mode->key_r) *a = 0; -+ else *a = 255; -+ } -+ else if(mode->bitdepth == 16) -+ { -+ *r = *g = *b = in[i * 2 + 0]; -+ if(mode->key_defined && 256U * in[i * 2 + 0] + in[i * 2 + 1] == mode->key_r) *a = 0; -+ else *a = 255; -+ } -+ else -+ { -+ unsigned highest = ((1U << mode->bitdepth) - 1U); /*highest possible value for this bit depth*/ -+ size_t j = i * mode->bitdepth; -+ unsigned value = readBitsFromReversedStream(&j, in, mode->bitdepth); -+ *r = *g = *b = (value * 255) / highest; -+ if(mode->key_defined && value == mode->key_r) *a = 0; -+ else *a = 255; -+ } -+ } -+ else if(mode->colortype == LCT_RGB) -+ { -+ if(mode->bitdepth == 8) -+ { -+ *r = in[i * 3 + 0]; *g = in[i * 3 + 1]; *b = in[i * 3 + 2]; -+ if(mode->key_defined && *r == mode->key_r && *g == mode->key_g && *b == mode->key_b) *a = 0; -+ else *a = 255; -+ } -+ else -+ { -+ *r = in[i * 6 + 0]; -+ *g = in[i * 6 + 2]; -+ *b = in[i * 6 + 4]; -+ if(mode->key_defined && 256U * in[i * 6 + 0] + in[i * 6 + 1] == mode->key_r -+ && 256U * in[i * 6 + 2] + in[i * 6 + 3] == mode->key_g -+ && 256U * in[i * 6 + 4] + in[i * 6 + 5] == mode->key_b) *a = 0; -+ else *a = 255; -+ } -+ } -+ else if(mode->colortype == LCT_PALETTE) -+ { -+ unsigned index; -+ if(mode->bitdepth == 8) index = in[i]; -+ else -+ { -+ size_t j = i * mode->bitdepth; -+ index = readBitsFromReversedStream(&j, in, mode->bitdepth); -+ } -+ -+ if(index >= mode->palettesize) -+ { -+ /*This is an error according to the PNG spec, but common PNG decoders make it black instead. -+ Done here too, slightly faster due to no error handling needed.*/ -+ *r = *g = *b = 0; -+ *a = 255; -+ } -+ else -+ { -+ *r = mode->palette[index * 4 + 0]; -+ *g = mode->palette[index * 4 + 1]; -+ *b = mode->palette[index * 4 + 2]; -+ *a = mode->palette[index * 4 + 3]; -+ } -+ } -+ else if(mode->colortype == LCT_GREY_ALPHA) -+ { -+ if(mode->bitdepth == 8) -+ { -+ *r = *g = *b = in[i * 2 + 0]; -+ *a = in[i * 2 + 1]; -+ } -+ else -+ { -+ *r = *g = *b = in[i * 4 + 0]; -+ *a = in[i * 4 + 2]; -+ } -+ } -+ else if(mode->colortype == LCT_RGBA) -+ { -+ if(mode->bitdepth == 8) -+ { -+ *r = in[i * 4 + 0]; -+ *g = in[i * 4 + 1]; -+ *b = in[i * 4 + 2]; -+ *a = in[i * 4 + 3]; -+ } -+ else -+ { -+ *r = in[i * 8 + 0]; -+ *g = in[i * 8 + 2]; -+ *b = in[i * 8 + 4]; -+ *a = in[i * 8 + 6]; -+ } -+ } -+} -+ -+/*Similar to getPixelColorRGBA8, but with all the for loops inside of the color -+mode test cases, optimized to convert the colors much faster, when converting -+to RGBA or RGB with 8 bit per cannel. buffer must be RGBA or RGB output with -+enough memory, if has_alpha is true the output is RGBA. mode has the color mode -+of the input buffer.*/ -+static void getPixelColorsRGBA8(unsigned char* buffer, size_t numpixels, -+ unsigned has_alpha, const unsigned char* in, -+ const LodePNGColorMode* mode) -+{ -+ unsigned num_channels = has_alpha ? 4 : 3; -+ size_t i; -+ if(mode->colortype == LCT_GREY) -+ { -+ if(mode->bitdepth == 8) -+ { -+ for(i = 0; i != numpixels; ++i, buffer += num_channels) -+ { -+ buffer[0] = buffer[1] = buffer[2] = in[i]; -+ if(has_alpha) buffer[3] = mode->key_defined && in[i] == mode->key_r ? 0 : 255; -+ } -+ } -+ else if(mode->bitdepth == 16) -+ { -+ for(i = 0; i != numpixels; ++i, buffer += num_channels) -+ { -+ buffer[0] = buffer[1] = buffer[2] = in[i * 2]; -+ if(has_alpha) buffer[3] = mode->key_defined && 256U * in[i * 2 + 0] + in[i * 2 + 1] == mode->key_r ? 0 : 255; -+ } -+ } -+ else -+ { -+ unsigned highest = ((1U << mode->bitdepth) - 1U); /*highest possible value for this bit depth*/ -+ size_t j = 0; -+ for(i = 0; i != numpixels; ++i, buffer += num_channels) -+ { -+ unsigned value = readBitsFromReversedStream(&j, in, mode->bitdepth); -+ buffer[0] = buffer[1] = buffer[2] = (value * 255) / highest; -+ if(has_alpha) buffer[3] = mode->key_defined && value == mode->key_r ? 0 : 255; -+ } -+ } -+ } -+ else if(mode->colortype == LCT_RGB) -+ { -+ if(mode->bitdepth == 8) -+ { -+ for(i = 0; i != numpixels; ++i, buffer += num_channels) -+ { -+ buffer[0] = in[i * 3 + 0]; -+ buffer[1] = in[i * 3 + 1]; -+ buffer[2] = in[i * 3 + 2]; -+ if(has_alpha) buffer[3] = mode->key_defined && buffer[0] == mode->key_r -+ && buffer[1]== mode->key_g && buffer[2] == mode->key_b ? 0 : 255; -+ } -+ } -+ else -+ { -+ for(i = 0; i != numpixels; ++i, buffer += num_channels) -+ { -+ buffer[0] = in[i * 6 + 0]; -+ buffer[1] = in[i * 6 + 2]; -+ buffer[2] = in[i * 6 + 4]; -+ if(has_alpha) buffer[3] = mode->key_defined -+ && 256U * in[i * 6 + 0] + in[i * 6 + 1] == mode->key_r -+ && 256U * in[i * 6 + 2] + in[i * 6 + 3] == mode->key_g -+ && 256U * in[i * 6 + 4] + in[i * 6 + 5] == mode->key_b ? 0 : 255; -+ } -+ } -+ } -+ else if(mode->colortype == LCT_PALETTE) -+ { -+ unsigned index; -+ size_t j = 0; -+ for(i = 0; i != numpixels; ++i, buffer += num_channels) -+ { -+ if(mode->bitdepth == 8) index = in[i]; -+ else index = readBitsFromReversedStream(&j, in, mode->bitdepth); -+ -+ if(index >= mode->palettesize) -+ { -+ /*This is an error according to the PNG spec, but most PNG decoders make it black instead. -+ Done here too, slightly faster due to no error handling needed.*/ -+ buffer[0] = buffer[1] = buffer[2] = 0; -+ if(has_alpha) buffer[3] = 255; -+ } -+ else -+ { -+ buffer[0] = mode->palette[index * 4 + 0]; -+ buffer[1] = mode->palette[index * 4 + 1]; -+ buffer[2] = mode->palette[index * 4 + 2]; -+ if(has_alpha) buffer[3] = mode->palette[index * 4 + 3]; -+ } -+ } -+ } -+ else if(mode->colortype == LCT_GREY_ALPHA) -+ { -+ if(mode->bitdepth == 8) -+ { -+ for(i = 0; i != numpixels; ++i, buffer += num_channels) -+ { -+ buffer[0] = buffer[1] = buffer[2] = in[i * 2 + 0]; -+ if(has_alpha) buffer[3] = in[i * 2 + 1]; -+ } -+ } -+ else -+ { -+ for(i = 0; i != numpixels; ++i, buffer += num_channels) -+ { -+ buffer[0] = buffer[1] = buffer[2] = in[i * 4 + 0]; -+ if(has_alpha) buffer[3] = in[i * 4 + 2]; -+ } -+ } -+ } -+ else if(mode->colortype == LCT_RGBA) -+ { -+ if(mode->bitdepth == 8) -+ { -+ for(i = 0; i != numpixels; ++i, buffer += num_channels) -+ { -+ buffer[0] = in[i * 4 + 0]; -+ buffer[1] = in[i * 4 + 1]; -+ buffer[2] = in[i * 4 + 2]; -+ if(has_alpha) buffer[3] = in[i * 4 + 3]; -+ } -+ } -+ else -+ { -+ for(i = 0; i != numpixels; ++i, buffer += num_channels) -+ { -+ buffer[0] = in[i * 8 + 0]; -+ buffer[1] = in[i * 8 + 2]; -+ buffer[2] = in[i * 8 + 4]; -+ if(has_alpha) buffer[3] = in[i * 8 + 6]; -+ } -+ } -+ } -+} -+ -+/*Get RGBA16 color of pixel with index i (y * width + x) from the raw image with -+given color type, but the given color type must be 16-bit itself.*/ -+static void getPixelColorRGBA16(unsigned short* r, unsigned short* g, unsigned short* b, unsigned short* a, -+ const unsigned char* in, size_t i, const LodePNGColorMode* mode) -+{ -+ if(mode->colortype == LCT_GREY) -+ { -+ *r = *g = *b = 256 * in[i * 2 + 0] + in[i * 2 + 1]; -+ if(mode->key_defined && 256U * in[i * 2 + 0] + in[i * 2 + 1] == mode->key_r) *a = 0; -+ else *a = 65535; -+ } -+ else if(mode->colortype == LCT_RGB) -+ { -+ *r = 256u * in[i * 6 + 0] + in[i * 6 + 1]; -+ *g = 256u * in[i * 6 + 2] + in[i * 6 + 3]; -+ *b = 256u * in[i * 6 + 4] + in[i * 6 + 5]; -+ if(mode->key_defined -+ && 256u * in[i * 6 + 0] + in[i * 6 + 1] == mode->key_r -+ && 256u * in[i * 6 + 2] + in[i * 6 + 3] == mode->key_g -+ && 256u * in[i * 6 + 4] + in[i * 6 + 5] == mode->key_b) *a = 0; -+ else *a = 65535; -+ } -+ else if(mode->colortype == LCT_GREY_ALPHA) -+ { -+ *r = *g = *b = 256u * in[i * 4 + 0] + in[i * 4 + 1]; -+ *a = 256u * in[i * 4 + 2] + in[i * 4 + 3]; -+ } -+ else if(mode->colortype == LCT_RGBA) -+ { -+ *r = 256u * in[i * 8 + 0] + in[i * 8 + 1]; -+ *g = 256u * in[i * 8 + 2] + in[i * 8 + 3]; -+ *b = 256u * in[i * 8 + 4] + in[i * 8 + 5]; -+ *a = 256u * in[i * 8 + 6] + in[i * 8 + 7]; -+ } -+} -+ -+unsigned lodepng_convert(unsigned char* out, const unsigned char* in, -+ const LodePNGColorMode* mode_out, const LodePNGColorMode* mode_in, -+ unsigned w, unsigned h) -+{ -+ size_t i; -+ ColorTree tree; -+ size_t numpixels = w * h; -+ -+ if(lodepng_color_mode_equal(mode_out, mode_in)) -+ { -+ size_t numbytes = lodepng_get_raw_size(w, h, mode_in); -+ for(i = 0; i != numbytes; ++i) out[i] = in[i]; -+ return 0; -+ } -+ -+ if(mode_out->colortype == LCT_PALETTE) -+ { -+ size_t palettesize = mode_out->palettesize; -+ const unsigned char* palette = mode_out->palette; -+ size_t palsize = 1u << mode_out->bitdepth; -+ /*if the user specified output palette but did not give the values, assume -+ they want the values of the input color type (assuming that one is palette). -+ Note that we never create a new palette ourselves.*/ -+ if(palettesize == 0) -+ { -+ palettesize = mode_in->palettesize; -+ palette = mode_in->palette; -+ } -+ if(palettesize < palsize) palsize = palettesize; -+ color_tree_init(&tree); -+ for(i = 0; i != palsize; ++i) -+ { -+ const unsigned char* p = &palette[i * 4]; -+ color_tree_add(&tree, p[0], p[1], p[2], p[3], i); -+ } -+ } -+ -+ if(mode_in->bitdepth == 16 && mode_out->bitdepth == 16) -+ { -+ for(i = 0; i != numpixels; ++i) -+ { -+ unsigned short r = 0, g = 0, b = 0, a = 0; -+ getPixelColorRGBA16(&r, &g, &b, &a, in, i, mode_in); -+ rgba16ToPixel(out, i, mode_out, r, g, b, a); -+ } -+ } -+ else if(mode_out->bitdepth == 8 && mode_out->colortype == LCT_RGBA) -+ { -+ getPixelColorsRGBA8(out, numpixels, 1, in, mode_in); -+ } -+ else if(mode_out->bitdepth == 8 && mode_out->colortype == LCT_RGB) -+ { -+ getPixelColorsRGBA8(out, numpixels, 0, in, mode_in); -+ } -+ else -+ { -+ unsigned char r = 0, g = 0, b = 0, a = 0; -+ for(i = 0; i != numpixels; ++i) -+ { -+ getPixelColorRGBA8(&r, &g, &b, &a, in, i, mode_in); -+ CERROR_TRY_RETURN(rgba8ToPixel(out, i, mode_out, &tree, r, g, b, a)); -+ } -+ } -+ -+ if(mode_out->colortype == LCT_PALETTE) -+ { -+ color_tree_cleanup(&tree); -+ } -+ -+ return 0; /*no error*/ -+} -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+ -+void lodepng_color_profile_init(LodePNGColorProfile* profile) -+{ -+ profile->colored = 0; -+ profile->key = 0; -+ profile->alpha = 0; -+ profile->key_r = profile->key_g = profile->key_b = 0; -+ profile->numcolors = 0; -+ profile->bits = 1; -+} -+ -+/*function used for debug purposes with C++*/ -+/*void printColorProfile(LodePNGColorProfile* p) -+{ -+ std::cout << "colored: " << (int)p->colored << ", "; -+ std::cout << "key: " << (int)p->key << ", "; -+ std::cout << "key_r: " << (int)p->key_r << ", "; -+ std::cout << "key_g: " << (int)p->key_g << ", "; -+ std::cout << "key_b: " << (int)p->key_b << ", "; -+ std::cout << "alpha: " << (int)p->alpha << ", "; -+ std::cout << "numcolors: " << (int)p->numcolors << ", "; -+ std::cout << "bits: " << (int)p->bits << std::endl; -+}*/ -+ -+/*Returns how many bits needed to represent given value (max 8 bit)*/ -+static unsigned getValueRequiredBits(unsigned char value) -+{ -+ if(value == 0 || value == 255) return 1; -+ /*The scaling of 2-bit and 4-bit values uses multiples of 85 and 17*/ -+ if(value % 17 == 0) return value % 85 == 0 ? 2 : 4; -+ return 8; -+} -+ -+/*profile must already have been inited with mode. -+It's ok to set some parameters of profile to done already.*/ -+unsigned lodepng_get_color_profile(LodePNGColorProfile* profile, -+ const unsigned char* in, unsigned w, unsigned h, -+ const LodePNGColorMode* mode) -+{ -+ unsigned error = 0; -+ size_t i; -+ ColorTree tree; -+ size_t numpixels = w * h; -+ -+ unsigned colored_done = lodepng_is_greyscale_type(mode) ? 1 : 0; -+ unsigned alpha_done = lodepng_can_have_alpha(mode) ? 0 : 1; -+ unsigned numcolors_done = 0; -+ unsigned bpp = lodepng_get_bpp(mode); -+ unsigned bits_done = bpp == 1 ? 1 : 0; -+ unsigned maxnumcolors = 257; -+ unsigned sixteen = 0; -+ if(bpp <= 8) maxnumcolors = bpp == 1 ? 2 : (bpp == 2 ? 4 : (bpp == 4 ? 16 : 256)); -+ -+ color_tree_init(&tree); -+ -+ /*Check if the 16-bit input is truly 16-bit*/ -+ if(mode->bitdepth == 16) -+ { -+ unsigned short r, g, b, a; -+ for(i = 0; i != numpixels; ++i) -+ { -+ getPixelColorRGBA16(&r, &g, &b, &a, in, i, mode); -+ if((r & 255) != ((r >> 8) & 255) || (g & 255) != ((g >> 8) & 255) || -+ (b & 255) != ((b >> 8) & 255) || (a & 255) != ((a >> 8) & 255)) /*first and second byte differ*/ -+ { -+ sixteen = 1; -+ break; -+ } -+ } -+ } -+ -+ if(sixteen) -+ { -+ unsigned short r = 0, g = 0, b = 0, a = 0; -+ profile->bits = 16; -+ bits_done = numcolors_done = 1; /*counting colors no longer useful, palette doesn't support 16-bit*/ -+ -+ for(i = 0; i != numpixels; ++i) -+ { -+ getPixelColorRGBA16(&r, &g, &b, &a, in, i, mode); -+ -+ if(!colored_done && (r != g || r != b)) -+ { -+ profile->colored = 1; -+ colored_done = 1; -+ } -+ -+ if(!alpha_done) -+ { -+ unsigned matchkey = (r == profile->key_r && g == profile->key_g && b == profile->key_b); -+ if(a != 65535 && (a != 0 || (profile->key && !matchkey))) -+ { -+ profile->alpha = 1; -+ alpha_done = 1; -+ if(profile->bits < 8) profile->bits = 8; /*PNG has no alphachannel modes with less than 8-bit per channel*/ -+ } -+ else if(a == 0 && !profile->alpha && !profile->key) -+ { -+ profile->key = 1; -+ profile->key_r = r; -+ profile->key_g = g; -+ profile->key_b = b; -+ } -+ else if(a == 65535 && profile->key && matchkey) -+ { -+ /* Color key cannot be used if an opaque pixel also has that RGB color. */ -+ profile->alpha = 1; -+ alpha_done = 1; -+ } -+ } -+ if(alpha_done && numcolors_done && colored_done && bits_done) break; -+ } -+ -+ if(profile->key && !profile->alpha) -+ { -+ for(i = 0; i != numpixels; ++i) -+ { -+ getPixelColorRGBA16(&r, &g, &b, &a, in, i, mode); -+ if(a != 0 && r == profile->key_r && g == profile->key_g && b == profile->key_b) -+ { -+ /* Color key cannot be used if an opaque pixel also has that RGB color. */ -+ profile->alpha = 1; -+ alpha_done = 1; -+ } -+ } -+ } -+ } -+ else /* < 16-bit */ -+ { -+ unsigned char r = 0, g = 0, b = 0, a = 0; -+ for(i = 0; i != numpixels; ++i) -+ { -+ getPixelColorRGBA8(&r, &g, &b, &a, in, i, mode); -+ -+ if(!bits_done && profile->bits < 8) -+ { -+ /*only r is checked, < 8 bits is only relevant for greyscale*/ -+ unsigned bits = getValueRequiredBits(r); -+ if(bits > profile->bits) profile->bits = bits; -+ } -+ bits_done = (profile->bits >= bpp); -+ -+ if(!colored_done && (r != g || r != b)) -+ { -+ profile->colored = 1; -+ colored_done = 1; -+ if(profile->bits < 8) profile->bits = 8; /*PNG has no colored modes with less than 8-bit per channel*/ -+ } -+ -+ if(!alpha_done) -+ { -+ unsigned matchkey = (r == profile->key_r && g == profile->key_g && b == profile->key_b); -+ if(a != 255 && (a != 0 || (profile->key && !matchkey))) -+ { -+ profile->alpha = 1; -+ alpha_done = 1; -+ if(profile->bits < 8) profile->bits = 8; /*PNG has no alphachannel modes with less than 8-bit per channel*/ -+ } -+ else if(a == 0 && !profile->alpha && !profile->key) -+ { -+ profile->key = 1; -+ profile->key_r = r; -+ profile->key_g = g; -+ profile->key_b = b; -+ } -+ else if(a == 255 && profile->key && matchkey) -+ { -+ /* Color key cannot be used if an opaque pixel also has that RGB color. */ -+ profile->alpha = 1; -+ alpha_done = 1; -+ if(profile->bits < 8) profile->bits = 8; /*PNG has no alphachannel modes with less than 8-bit per channel*/ -+ } -+ } -+ -+ if(!numcolors_done) -+ { -+ if(!color_tree_has(&tree, r, g, b, a)) -+ { -+ color_tree_add(&tree, r, g, b, a, profile->numcolors); -+ if(profile->numcolors < 256) -+ { -+ unsigned char* p = profile->palette; -+ unsigned n = profile->numcolors; -+ p[n * 4 + 0] = r; -+ p[n * 4 + 1] = g; -+ p[n * 4 + 2] = b; -+ p[n * 4 + 3] = a; -+ } -+ ++profile->numcolors; -+ numcolors_done = profile->numcolors >= maxnumcolors; -+ } -+ } -+ -+ if(alpha_done && numcolors_done && colored_done && bits_done) break; -+ } -+ -+ if(profile->key && !profile->alpha) -+ { -+ for(i = 0; i != numpixels; ++i) -+ { -+ getPixelColorRGBA8(&r, &g, &b, &a, in, i, mode); -+ if(a != 0 && r == profile->key_r && g == profile->key_g && b == profile->key_b) -+ { -+ /* Color key cannot be used if an opaque pixel also has that RGB color. */ -+ profile->alpha = 1; -+ alpha_done = 1; -+ } -+ } -+ } -+ -+ /*make the profile's key always 16-bit for consistency - repeat each byte twice*/ -+ profile->key_r += (profile->key_r << 8); -+ profile->key_g += (profile->key_g << 8); -+ profile->key_b += (profile->key_b << 8); -+ } -+ -+ color_tree_cleanup(&tree); -+ return error; -+} -+ -+/*Automatically chooses color type that gives smallest amount of bits in the -+output image, e.g. grey if there are only greyscale pixels, palette if there -+are less than 256 colors, ... -+Updates values of mode with a potentially smaller color model. mode_out should -+contain the user chosen color model, but will be overwritten with the new chosen one.*/ -+unsigned lodepng_auto_choose_color(LodePNGColorMode* mode_out, -+ const unsigned char* image, unsigned w, unsigned h, -+ const LodePNGColorMode* mode_in) -+{ -+ LodePNGColorProfile prof; -+ unsigned error = 0; -+ unsigned i, n, palettebits, grey_ok, palette_ok; -+ -+ lodepng_color_profile_init(&prof); -+ error = lodepng_get_color_profile(&prof, image, w, h, mode_in); -+ if(error) return error; -+ mode_out->key_defined = 0; -+ -+ if(prof.key && w * h <= 16) -+ { -+ prof.alpha = 1; /*too few pixels to justify tRNS chunk overhead*/ -+ if(prof.bits < 8) prof.bits = 8; /*PNG has no alphachannel modes with less than 8-bit per channel*/ -+ } -+ grey_ok = !prof.colored && !prof.alpha; /*grey without alpha, with potentially low bits*/ -+ n = prof.numcolors; -+ palettebits = n <= 2 ? 1 : (n <= 4 ? 2 : (n <= 16 ? 4 : 8)); -+ palette_ok = n <= 256 && (n * 2 < w * h) && prof.bits <= 8; -+ if(w * h < n * 2) palette_ok = 0; /*don't add palette overhead if image has only a few pixels*/ -+ if(grey_ok && prof.bits <= palettebits) palette_ok = 0; /*grey is less overhead*/ -+ -+ if(palette_ok) -+ { -+ unsigned char* p = prof.palette; -+ lodepng_palette_clear(mode_out); /*remove potential earlier palette*/ -+ for(i = 0; i != prof.numcolors; ++i) -+ { -+ error = lodepng_palette_add(mode_out, p[i * 4 + 0], p[i * 4 + 1], p[i * 4 + 2], p[i * 4 + 3]); -+ if(error) break; -+ } -+ -+ mode_out->colortype = LCT_PALETTE; -+ mode_out->bitdepth = palettebits; -+ -+ if(mode_in->colortype == LCT_PALETTE && mode_in->palettesize >= mode_out->palettesize -+ && mode_in->bitdepth == mode_out->bitdepth) -+ { -+ /*If input should have same palette colors, keep original to preserve its order and prevent conversion*/ -+ lodepng_color_mode_cleanup(mode_out); -+ lodepng_color_mode_copy(mode_out, mode_in); -+ } -+ } -+ else /*8-bit or 16-bit per channel*/ -+ { -+ mode_out->bitdepth = prof.bits; -+ mode_out->colortype = prof.alpha ? (prof.colored ? LCT_RGBA : LCT_GREY_ALPHA) -+ : (prof.colored ? LCT_RGB : LCT_GREY); -+ -+ if(prof.key && !prof.alpha) -+ { -+ unsigned mask = (1u << mode_out->bitdepth) - 1u; /*profile always uses 16-bit, mask converts it*/ -+ mode_out->key_r = prof.key_r & mask; -+ mode_out->key_g = prof.key_g & mask; -+ mode_out->key_b = prof.key_b & mask; -+ mode_out->key_defined = 1; -+ } -+ } -+ -+ return error; -+} -+ -+#endif /* #ifdef LODEPNG_COMPILE_ENCODER */ -+ -+/* -+Paeth predicter, used by PNG filter type 4 -+The parameters are of type short, but should come from unsigned chars, the shorts -+are only needed to make the paeth calculation correct. -+*/ -+static unsigned char paethPredictor(short a, short b, short c) -+{ -+ short pa = abs(b - c); -+ short pb = abs(a - c); -+ short pc = abs(a + b - c - c); -+ -+ if(pc < pa && pc < pb) return (unsigned char)c; -+ else if(pb < pa) return (unsigned char)b; -+ else return (unsigned char)a; -+} -+ -+/*shared values used by multiple Adam7 related functions*/ -+ -+static const unsigned ADAM7_IX[7] = { 0, 4, 0, 2, 0, 1, 0 }; /*x start values*/ -+static const unsigned ADAM7_IY[7] = { 0, 0, 4, 0, 2, 0, 1 }; /*y start values*/ -+static const unsigned ADAM7_DX[7] = { 8, 8, 4, 4, 2, 2, 1 }; /*x delta values*/ -+static const unsigned ADAM7_DY[7] = { 8, 8, 8, 4, 4, 2, 2 }; /*y delta values*/ -+ -+/* -+Outputs various dimensions and positions in the image related to the Adam7 reduced images. -+passw: output containing the width of the 7 passes -+passh: output containing the height of the 7 passes -+filter_passstart: output containing the index of the start and end of each -+ reduced image with filter bytes -+padded_passstart output containing the index of the start and end of each -+ reduced image when without filter bytes but with padded scanlines -+passstart: output containing the index of the start and end of each reduced -+ image without padding between scanlines, but still padding between the images -+w, h: width and height of non-interlaced image -+bpp: bits per pixel -+"padded" is only relevant if bpp is less than 8 and a scanline or image does not -+ end at a full byte -+*/ -+static void Adam7_getpassvalues(unsigned passw[7], unsigned passh[7], size_t filter_passstart[8], -+ size_t padded_passstart[8], size_t passstart[8], unsigned w, unsigned h, unsigned bpp) -+{ -+ /*the passstart values have 8 values: the 8th one indicates the byte after the end of the 7th (= last) pass*/ -+ unsigned i; -+ -+ /*calculate width and height in pixels of each pass*/ -+ for(i = 0; i != 7; ++i) -+ { -+ passw[i] = (w + ADAM7_DX[i] - ADAM7_IX[i] - 1) / ADAM7_DX[i]; -+ passh[i] = (h + ADAM7_DY[i] - ADAM7_IY[i] - 1) / ADAM7_DY[i]; -+ if(passw[i] == 0) passh[i] = 0; -+ if(passh[i] == 0) passw[i] = 0; -+ } -+ -+ filter_passstart[0] = padded_passstart[0] = passstart[0] = 0; -+ for(i = 0; i != 7; ++i) -+ { -+ /*if passw[i] is 0, it's 0 bytes, not 1 (no filtertype-byte)*/ -+ filter_passstart[i + 1] = filter_passstart[i] -+ + ((passw[i] && passh[i]) ? passh[i] * (1 + (passw[i] * bpp + 7) / 8) : 0); -+ /*bits padded if needed to fill full byte at end of each scanline*/ -+ padded_passstart[i + 1] = padded_passstart[i] + passh[i] * ((passw[i] * bpp + 7) / 8); -+ /*only padded at end of reduced image*/ -+ passstart[i + 1] = passstart[i] + (passh[i] * passw[i] * bpp + 7) / 8; -+ } -+} -+ -+#ifdef LODEPNG_COMPILE_DECODER -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* / PNG Decoder / */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+/*read the information from the header and store it in the LodePNGInfo. return value is error*/ -+unsigned lodepng_inspect(unsigned* w, unsigned* h, LodePNGState* state, -+ const unsigned char* in, size_t insize) -+{ -+ LodePNGInfo* info = &state->info_png; -+ if(insize == 0 || in == 0) -+ { -+ CERROR_RETURN_ERROR(state->error, 48); /*error: the given data is empty*/ -+ } -+ if(insize < 33) -+ { -+ CERROR_RETURN_ERROR(state->error, 27); /*error: the data length is smaller than the length of a PNG header*/ -+ } -+ -+ /*when decoding a new PNG image, make sure all parameters created after previous decoding are reset*/ -+ lodepng_info_cleanup(info); -+ lodepng_info_init(info); -+ -+ if(in[0] != 137 || in[1] != 80 || in[2] != 78 || in[3] != 71 -+ || in[4] != 13 || in[5] != 10 || in[6] != 26 || in[7] != 10) -+ { -+ CERROR_RETURN_ERROR(state->error, 28); /*error: the first 8 bytes are not the correct PNG signature*/ -+ } -+ if(lodepng_chunk_length(in + 8) != 13) -+ { -+ CERROR_RETURN_ERROR(state->error, 94); /*error: header size must be 13 bytes*/ -+ } -+ if(!lodepng_chunk_type_equals(in + 8, "IHDR")) -+ { -+ CERROR_RETURN_ERROR(state->error, 29); /*error: it doesn't start with a IHDR chunk!*/ -+ } -+ -+ /*read the values given in the header*/ -+ *w = lodepng_read32bitInt(&in[16]); -+ *h = lodepng_read32bitInt(&in[20]); -+ info->color.bitdepth = in[24]; -+ info->color.colortype = (LodePNGColorType)in[25]; -+ info->compression_method = in[26]; -+ info->filter_method = in[27]; -+ info->interlace_method = in[28]; -+ -+ if(*w == 0 || *h == 0) -+ { -+ CERROR_RETURN_ERROR(state->error, 93); -+ } -+ -+ if(!state->decoder.ignore_crc) -+ { -+ unsigned CRC = lodepng_read32bitInt(&in[29]); -+ unsigned checksum = lodepng_crc32(&in[12], 17); -+ if(CRC != checksum) -+ { -+ CERROR_RETURN_ERROR(state->error, 57); /*invalid CRC*/ -+ } -+ } -+ -+ /*error: only compression method 0 is allowed in the specification*/ -+ if(info->compression_method != 0) CERROR_RETURN_ERROR(state->error, 32); -+ /*error: only filter method 0 is allowed in the specification*/ -+ if(info->filter_method != 0) CERROR_RETURN_ERROR(state->error, 33); -+ /*error: only interlace methods 0 and 1 exist in the specification*/ -+ if(info->interlace_method > 1) CERROR_RETURN_ERROR(state->error, 34); -+ -+ state->error = checkColorValidity(info->color.colortype, info->color.bitdepth); -+ return state->error; -+} -+ -+static unsigned unfilterScanline(unsigned char* recon, const unsigned char* scanline, const unsigned char* precon, -+ size_t bytewidth, unsigned char filterType, size_t length) -+{ -+ /* -+ For PNG filter method 0 -+ unfilter a PNG image scanline by scanline. when the pixels are smaller than 1 byte, -+ the filter works byte per byte (bytewidth = 1) -+ precon is the previous unfiltered scanline, recon the result, scanline the current one -+ the incoming scanlines do NOT include the filtertype byte, that one is given in the parameter filterType instead -+ recon and scanline MAY be the same memory address! precon must be disjoint. -+ */ -+ -+ size_t i; -+ switch(filterType) -+ { -+ case 0: -+ for(i = 0; i != length; ++i) recon[i] = scanline[i]; -+ break; -+ case 1: -+ for(i = 0; i != bytewidth; ++i) recon[i] = scanline[i]; -+ for(i = bytewidth; i < length; ++i) recon[i] = scanline[i] + recon[i - bytewidth]; -+ break; -+ case 2: -+ if(precon) -+ { -+ for(i = 0; i != length; ++i) recon[i] = scanline[i] + precon[i]; -+ } -+ else -+ { -+ for(i = 0; i != length; ++i) recon[i] = scanline[i]; -+ } -+ break; -+ case 3: -+ if(precon) -+ { -+ for(i = 0; i != bytewidth; ++i) recon[i] = scanline[i] + (precon[i] >> 1); -+ for(i = bytewidth; i < length; ++i) recon[i] = scanline[i] + ((recon[i - bytewidth] + precon[i]) >> 1); -+ } -+ else -+ { -+ for(i = 0; i != bytewidth; ++i) recon[i] = scanline[i]; -+ for(i = bytewidth; i < length; ++i) recon[i] = scanline[i] + (recon[i - bytewidth] >> 1); -+ } -+ break; -+ case 4: -+ if(precon) -+ { -+ for(i = 0; i != bytewidth; ++i) -+ { -+ recon[i] = (scanline[i] + precon[i]); /*paethPredictor(0, precon[i], 0) is always precon[i]*/ -+ } -+ for(i = bytewidth; i < length; ++i) -+ { -+ recon[i] = (scanline[i] + paethPredictor(recon[i - bytewidth], precon[i], precon[i - bytewidth])); -+ } -+ } -+ else -+ { -+ for(i = 0; i != bytewidth; ++i) -+ { -+ recon[i] = scanline[i]; -+ } -+ for(i = bytewidth; i < length; ++i) -+ { -+ /*paethPredictor(recon[i - bytewidth], 0, 0) is always recon[i - bytewidth]*/ -+ recon[i] = (scanline[i] + recon[i - bytewidth]); -+ } -+ } -+ break; -+ default: return 36; /*error: unexisting filter type given*/ -+ } -+ return 0; -+} -+ -+static unsigned unfilter(unsigned char* out, const unsigned char* in, unsigned w, unsigned h, unsigned bpp) -+{ -+ /* -+ For PNG filter method 0 -+ this function unfilters a single image (e.g. without interlacing this is called once, with Adam7 seven times) -+ out must have enough bytes allocated already, in must have the scanlines + 1 filtertype byte per scanline -+ w and h are image dimensions or dimensions of reduced image, bpp is bits per pixel -+ in and out are allowed to be the same memory address (but aren't the same size since in has the extra filter bytes) -+ */ -+ -+ unsigned y; -+ unsigned char* prevline = 0; -+ -+ /*bytewidth is used for filtering, is 1 when bpp < 8, number of bytes per pixel otherwise*/ -+ size_t bytewidth = (bpp + 7) / 8; -+ size_t linebytes = (w * bpp + 7) / 8; -+ -+ for(y = 0; y < h; ++y) -+ { -+ size_t outindex = linebytes * y; -+ size_t inindex = (1 + linebytes) * y; /*the extra filterbyte added to each row*/ -+ unsigned char filterType = in[inindex]; -+ -+ CERROR_TRY_RETURN(unfilterScanline(&out[outindex], &in[inindex + 1], prevline, bytewidth, filterType, linebytes)); -+ -+ prevline = &out[outindex]; -+ } -+ -+ return 0; -+} -+ -+/* -+in: Adam7 interlaced image, with no padding bits between scanlines, but between -+ reduced images so that each reduced image starts at a byte. -+out: the same pixels, but re-ordered so that they're now a non-interlaced image with size w*h -+bpp: bits per pixel -+out has the following size in bits: w * h * bpp. -+in is possibly bigger due to padding bits between reduced images. -+out must be big enough AND must be 0 everywhere if bpp < 8 in the current implementation -+(because that's likely a little bit faster) -+NOTE: comments about padding bits are only relevant if bpp < 8 -+*/ -+static void Adam7_deinterlace(unsigned char* out, const unsigned char* in, unsigned w, unsigned h, unsigned bpp) -+{ -+ unsigned passw[7], passh[7]; -+ size_t filter_passstart[8], padded_passstart[8], passstart[8]; -+ unsigned i; -+ -+ Adam7_getpassvalues(passw, passh, filter_passstart, padded_passstart, passstart, w, h, bpp); -+ -+ if(bpp >= 8) -+ { -+ for(i = 0; i != 7; ++i) -+ { -+ unsigned x, y, b; -+ size_t bytewidth = bpp / 8; -+ for(y = 0; y < passh[i]; ++y) -+ for(x = 0; x < passw[i]; ++x) -+ { -+ size_t pixelinstart = passstart[i] + (y * passw[i] + x) * bytewidth; -+ size_t pixeloutstart = ((ADAM7_IY[i] + y * ADAM7_DY[i]) * w + ADAM7_IX[i] + x * ADAM7_DX[i]) * bytewidth; -+ for(b = 0; b < bytewidth; ++b) -+ { -+ out[pixeloutstart + b] = in[pixelinstart + b]; -+ } -+ } -+ } -+ } -+ else /*bpp < 8: Adam7 with pixels < 8 bit is a bit trickier: with bit pointers*/ -+ { -+ for(i = 0; i != 7; ++i) -+ { -+ unsigned x, y, b; -+ unsigned ilinebits = bpp * passw[i]; -+ unsigned olinebits = bpp * w; -+ size_t obp, ibp; /*bit pointers (for out and in buffer)*/ -+ for(y = 0; y < passh[i]; ++y) -+ for(x = 0; x < passw[i]; ++x) -+ { -+ ibp = (8 * passstart[i]) + (y * ilinebits + x * bpp); -+ obp = (ADAM7_IY[i] + y * ADAM7_DY[i]) * olinebits + (ADAM7_IX[i] + x * ADAM7_DX[i]) * bpp; -+ for(b = 0; b < bpp; ++b) -+ { -+ unsigned char bit = readBitFromReversedStream(&ibp, in); -+ /*note that this function assumes the out buffer is completely 0, use setBitOfReversedStream otherwise*/ -+ setBitOfReversedStream0(&obp, out, bit); -+ } -+ } -+ } -+ } -+} -+ -+static void removePaddingBits(unsigned char* out, const unsigned char* in, -+ size_t olinebits, size_t ilinebits, unsigned h) -+{ -+ /* -+ After filtering there are still padding bits if scanlines have non multiple of 8 bit amounts. They need -+ to be removed (except at last scanline of (Adam7-reduced) image) before working with pure image buffers -+ for the Adam7 code, the color convert code and the output to the user. -+ in and out are allowed to be the same buffer, in may also be higher but still overlapping; in must -+ have >= ilinebits*h bits, out must have >= olinebits*h bits, olinebits must be <= ilinebits -+ also used to move bits after earlier such operations happened, e.g. in a sequence of reduced images from Adam7 -+ only useful if (ilinebits - olinebits) is a value in the range 1..7 -+ */ -+ unsigned y; -+ size_t diff = ilinebits - olinebits; -+ size_t ibp = 0, obp = 0; /*input and output bit pointers*/ -+ for(y = 0; y < h; ++y) -+ { -+ size_t x; -+ for(x = 0; x < olinebits; ++x) -+ { -+ unsigned char bit = readBitFromReversedStream(&ibp, in); -+ setBitOfReversedStream(&obp, out, bit); -+ } -+ ibp += diff; -+ } -+} -+ -+/*out must be buffer big enough to contain full image, and in must contain the full decompressed data from -+the IDAT chunks (with filter index bytes and possible padding bits) -+return value is error*/ -+static unsigned postProcessScanlines(unsigned char* out, unsigned char* in, -+ unsigned w, unsigned h, const LodePNGInfo* info_png) -+{ -+ /* -+ This function converts the filtered-padded-interlaced data into pure 2D image buffer with the PNG's colortype. -+ Steps: -+ *) if no Adam7: 1) unfilter 2) remove padding bits (= posible extra bits per scanline if bpp < 8) -+ *) if adam7: 1) 7x unfilter 2) 7x remove padding bits 3) Adam7_deinterlace -+ NOTE: the in buffer will be overwritten with intermediate data! -+ */ -+ unsigned bpp = lodepng_get_bpp(&info_png->color); -+ if(bpp == 0) return 31; /*error: invalid colortype*/ -+ -+ if(info_png->interlace_method == 0) -+ { -+ if(bpp < 8 && w * bpp != ((w * bpp + 7) / 8) * 8) -+ { -+ CERROR_TRY_RETURN(unfilter(in, in, w, h, bpp)); -+ removePaddingBits(out, in, w * bpp, ((w * bpp + 7) / 8) * 8, h); -+ } -+ /*we can immediately filter into the out buffer, no other steps needed*/ -+ else CERROR_TRY_RETURN(unfilter(out, in, w, h, bpp)); -+ } -+ else /*interlace_method is 1 (Adam7)*/ -+ { -+ unsigned passw[7], passh[7]; size_t filter_passstart[8], padded_passstart[8], passstart[8]; -+ unsigned i; -+ -+ Adam7_getpassvalues(passw, passh, filter_passstart, padded_passstart, passstart, w, h, bpp); -+ -+ for(i = 0; i != 7; ++i) -+ { -+ CERROR_TRY_RETURN(unfilter(&in[padded_passstart[i]], &in[filter_passstart[i]], passw[i], passh[i], bpp)); -+ /*TODO: possible efficiency improvement: if in this reduced image the bits fit nicely in 1 scanline, -+ move bytes instead of bits or move not at all*/ -+ if(bpp < 8) -+ { -+ /*remove padding bits in scanlines; after this there still may be padding -+ bits between the different reduced images: each reduced image still starts nicely at a byte*/ -+ removePaddingBits(&in[passstart[i]], &in[padded_passstart[i]], passw[i] * bpp, -+ ((passw[i] * bpp + 7) / 8) * 8, passh[i]); -+ } -+ } -+ -+ Adam7_deinterlace(out, in, w, h, bpp); -+ } -+ -+ return 0; -+} -+ -+static unsigned readChunk_PLTE(LodePNGColorMode* color, const unsigned char* data, size_t chunkLength) -+{ -+ unsigned pos = 0, i; -+ if(color->palette) lodepng_free(color->palette); -+ color->palettesize = chunkLength / 3; -+ color->palette = (unsigned char*)lodepng_malloc(4 * color->palettesize); -+ if(!color->palette && color->palettesize) -+ { -+ color->palettesize = 0; -+ return 83; /*alloc fail*/ -+ } -+ if(color->palettesize > 256) return 38; /*error: palette too big*/ -+ -+ for(i = 0; i != color->palettesize; ++i) -+ { -+ color->palette[4 * i + 0] = data[pos++]; /*R*/ -+ color->palette[4 * i + 1] = data[pos++]; /*G*/ -+ color->palette[4 * i + 2] = data[pos++]; /*B*/ -+ color->palette[4 * i + 3] = 255; /*alpha*/ -+ } -+ -+ return 0; /* OK */ -+} -+ -+static unsigned readChunk_tRNS(LodePNGColorMode* color, const unsigned char* data, size_t chunkLength) -+{ -+ unsigned i; -+ if(color->colortype == LCT_PALETTE) -+ { -+ /*error: more alpha values given than there are palette entries*/ -+ if(chunkLength > color->palettesize) return 38; -+ -+ for(i = 0; i != chunkLength; ++i) color->palette[4 * i + 3] = data[i]; -+ } -+ else if(color->colortype == LCT_GREY) -+ { -+ /*error: this chunk must be 2 bytes for greyscale image*/ -+ if(chunkLength != 2) return 30; -+ -+ color->key_defined = 1; -+ color->key_r = color->key_g = color->key_b = 256u * data[0] + data[1]; -+ } -+ else if(color->colortype == LCT_RGB) -+ { -+ /*error: this chunk must be 6 bytes for RGB image*/ -+ if(chunkLength != 6) return 41; -+ -+ color->key_defined = 1; -+ color->key_r = 256u * data[0] + data[1]; -+ color->key_g = 256u * data[2] + data[3]; -+ color->key_b = 256u * data[4] + data[5]; -+ } -+ else return 42; /*error: tRNS chunk not allowed for other color models*/ -+ -+ return 0; /* OK */ -+} -+ -+ -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+/*background color chunk (bKGD)*/ -+static unsigned readChunk_bKGD(LodePNGInfo* info, const unsigned char* data, size_t chunkLength) -+{ -+ if(info->color.colortype == LCT_PALETTE) -+ { -+ /*error: this chunk must be 1 byte for indexed color image*/ -+ if(chunkLength != 1) return 43; -+ -+ info->background_defined = 1; -+ info->background_r = info->background_g = info->background_b = data[0]; -+ } -+ else if(info->color.colortype == LCT_GREY || info->color.colortype == LCT_GREY_ALPHA) -+ { -+ /*error: this chunk must be 2 bytes for greyscale image*/ -+ if(chunkLength != 2) return 44; -+ -+ info->background_defined = 1; -+ info->background_r = info->background_g = info->background_b = 256u * data[0] + data[1]; -+ } -+ else if(info->color.colortype == LCT_RGB || info->color.colortype == LCT_RGBA) -+ { -+ /*error: this chunk must be 6 bytes for greyscale image*/ -+ if(chunkLength != 6) return 45; -+ -+ info->background_defined = 1; -+ info->background_r = 256u * data[0] + data[1]; -+ info->background_g = 256u * data[2] + data[3]; -+ info->background_b = 256u * data[4] + data[5]; -+ } -+ -+ return 0; /* OK */ -+} -+ -+/*text chunk (tEXt)*/ -+static unsigned readChunk_tEXt(LodePNGInfo* info, const unsigned char* data, size_t chunkLength) -+{ -+ unsigned error = 0; -+ char *key = 0, *str = 0; -+ unsigned i; -+ -+ while(!error) /*not really a while loop, only used to break on error*/ -+ { -+ unsigned length, string2_begin; -+ -+ length = 0; -+ while(length < chunkLength && data[length] != 0) ++length; -+ /*even though it's not allowed by the standard, no error is thrown if -+ there's no null termination char, if the text is empty*/ -+ if(length < 1 || length > 79) CERROR_BREAK(error, 89); /*keyword too short or long*/ -+ -+ key = (char*)lodepng_malloc(length + 1); -+ if(!key) CERROR_BREAK(error, 83); /*alloc fail*/ -+ -+ key[length] = 0; -+ for(i = 0; i != length; ++i) key[i] = (char)data[i]; -+ -+ string2_begin = length + 1; /*skip keyword null terminator*/ -+ -+ length = chunkLength < string2_begin ? 0 : chunkLength - string2_begin; -+ str = (char*)lodepng_malloc(length + 1); -+ if(!str) CERROR_BREAK(error, 83); /*alloc fail*/ -+ -+ str[length] = 0; -+ for(i = 0; i != length; ++i) str[i] = (char)data[string2_begin + i]; -+ -+ error = lodepng_add_text(info, key, str); -+ -+ break; -+ } -+ -+ lodepng_free(key); -+ lodepng_free(str); -+ -+ return error; -+} -+ -+/*compressed text chunk (zTXt)*/ -+static unsigned readChunk_zTXt(LodePNGInfo* info, const LodePNGDecompressSettings* zlibsettings, -+ const unsigned char* data, size_t chunkLength) -+{ -+ unsigned error = 0; -+ unsigned i; -+ -+ unsigned length, string2_begin; -+ char *key = 0; -+ ucvector decoded; -+ -+ ucvector_init(&decoded); -+ -+ while(!error) /*not really a while loop, only used to break on error*/ -+ { -+ for(length = 0; length < chunkLength && data[length] != 0; ++length) ; -+ if(length + 2 >= chunkLength) CERROR_BREAK(error, 75); /*no null termination, corrupt?*/ -+ if(length < 1 || length > 79) CERROR_BREAK(error, 89); /*keyword too short or long*/ -+ -+ key = (char*)lodepng_malloc(length + 1); -+ if(!key) CERROR_BREAK(error, 83); /*alloc fail*/ -+ -+ key[length] = 0; -+ for(i = 0; i != length; ++i) key[i] = (char)data[i]; -+ -+ if(data[length + 1] != 0) CERROR_BREAK(error, 72); /*the 0 byte indicating compression must be 0*/ -+ -+ string2_begin = length + 2; -+ if(string2_begin > chunkLength) CERROR_BREAK(error, 75); /*no null termination, corrupt?*/ -+ -+ length = chunkLength - string2_begin; -+ /*will fail if zlib error, e.g. if length is too small*/ -+ error = zlib_decompress(&decoded.data, &decoded.size, -+ (unsigned char*)(&data[string2_begin]), -+ length, zlibsettings); -+ if(error) break; -+ ucvector_push_back(&decoded, 0); -+ -+ error = lodepng_add_text(info, key, (char*)decoded.data); -+ -+ break; -+ } -+ -+ lodepng_free(key); -+ ucvector_cleanup(&decoded); -+ -+ return error; -+} -+ -+/*international text chunk (iTXt)*/ -+static unsigned readChunk_iTXt(LodePNGInfo* info, const LodePNGDecompressSettings* zlibsettings, -+ const unsigned char* data, size_t chunkLength) -+{ -+ unsigned error = 0; -+ unsigned i; -+ -+ unsigned length, begin, compressed; -+ char *key = 0, *langtag = 0, *transkey = 0; -+ ucvector decoded; -+ ucvector_init(&decoded); -+ -+ while(!error) /*not really a while loop, only used to break on error*/ -+ { -+ /*Quick check if the chunk length isn't too small. Even without check -+ it'd still fail with other error checks below if it's too short. This just gives a different error code.*/ -+ if(chunkLength < 5) CERROR_BREAK(error, 30); /*iTXt chunk too short*/ -+ -+ /*read the key*/ -+ for(length = 0; length < chunkLength && data[length] != 0; ++length) ; -+ if(length + 3 >= chunkLength) CERROR_BREAK(error, 75); /*no null termination char, corrupt?*/ -+ if(length < 1 || length > 79) CERROR_BREAK(error, 89); /*keyword too short or long*/ -+ -+ key = (char*)lodepng_malloc(length + 1); -+ if(!key) CERROR_BREAK(error, 83); /*alloc fail*/ -+ -+ key[length] = 0; -+ for(i = 0; i != length; ++i) key[i] = (char)data[i]; -+ -+ /*read the compression method*/ -+ compressed = data[length + 1]; -+ if(data[length + 2] != 0) CERROR_BREAK(error, 72); /*the 0 byte indicating compression must be 0*/ -+ -+ /*even though it's not allowed by the standard, no error is thrown if -+ there's no null termination char, if the text is empty for the next 3 texts*/ -+ -+ /*read the langtag*/ -+ begin = length + 3; -+ length = 0; -+ for(i = begin; i < chunkLength && data[i] != 0; ++i) ++length; -+ -+ langtag = (char*)lodepng_malloc(length + 1); -+ if(!langtag) CERROR_BREAK(error, 83); /*alloc fail*/ -+ -+ langtag[length] = 0; -+ for(i = 0; i != length; ++i) langtag[i] = (char)data[begin + i]; -+ -+ /*read the transkey*/ -+ begin += length + 1; -+ length = 0; -+ for(i = begin; i < chunkLength && data[i] != 0; ++i) ++length; -+ -+ transkey = (char*)lodepng_malloc(length + 1); -+ if(!transkey) CERROR_BREAK(error, 83); /*alloc fail*/ -+ -+ transkey[length] = 0; -+ for(i = 0; i != length; ++i) transkey[i] = (char)data[begin + i]; -+ -+ /*read the actual text*/ -+ begin += length + 1; -+ -+ length = chunkLength < begin ? 0 : chunkLength - begin; -+ -+ if(compressed) -+ { -+ /*will fail if zlib error, e.g. if length is too small*/ -+ error = zlib_decompress(&decoded.data, &decoded.size, -+ (unsigned char*)(&data[begin]), -+ length, zlibsettings); -+ if(error) break; -+ if(decoded.allocsize < decoded.size) decoded.allocsize = decoded.size; -+ ucvector_push_back(&decoded, 0); -+ } -+ else -+ { -+ if(!ucvector_resize(&decoded, length + 1)) CERROR_BREAK(error, 83 /*alloc fail*/); -+ -+ decoded.data[length] = 0; -+ for(i = 0; i != length; ++i) decoded.data[i] = data[begin + i]; -+ } -+ -+ error = lodepng_add_itext(info, key, langtag, transkey, (char*)decoded.data); -+ -+ break; -+ } -+ -+ lodepng_free(key); -+ lodepng_free(langtag); -+ lodepng_free(transkey); -+ ucvector_cleanup(&decoded); -+ -+ return error; -+} -+ -+static unsigned readChunk_tIME(LodePNGInfo* info, const unsigned char* data, size_t chunkLength) -+{ -+ if(chunkLength != 7) return 73; /*invalid tIME chunk size*/ -+ -+ info->time_defined = 1; -+ info->time.year = 256u * data[0] + data[1]; -+ info->time.month = data[2]; -+ info->time.day = data[3]; -+ info->time.hour = data[4]; -+ info->time.minute = data[5]; -+ info->time.second = data[6]; -+ -+ return 0; /* OK */ -+} -+ -+static unsigned readChunk_pHYs(LodePNGInfo* info, const unsigned char* data, size_t chunkLength) -+{ -+ if(chunkLength != 9) return 74; /*invalid pHYs chunk size*/ -+ -+ info->phys_defined = 1; -+ info->phys_x = 16777216u * data[0] + 65536u * data[1] + 256u * data[2] + data[3]; -+ info->phys_y = 16777216u * data[4] + 65536u * data[5] + 256u * data[6] + data[7]; -+ info->phys_unit = data[8]; -+ -+ return 0; /* OK */ -+} -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ -+/*read a PNG, the result will be in the same color type as the PNG (hence "generic")*/ -+static void decodeGeneric(unsigned char** out, unsigned* w, unsigned* h, -+ LodePNGState* state, -+ const unsigned char* in, size_t insize) -+{ -+ unsigned char IEND = 0; -+ const unsigned char* chunk; -+ size_t i; -+ ucvector idat; /*the data from idat chunks*/ -+ ucvector scanlines; -+ size_t predict; -+ size_t numpixels; -+ size_t outsize; -+ -+ /*for unknown chunk order*/ -+ unsigned unknown = 0; -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ unsigned critical_pos = 1; /*1 = after IHDR, 2 = after PLTE, 3 = after IDAT*/ -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ -+ /*provide some proper output values if error will happen*/ -+ *out = 0; -+ -+ state->error = lodepng_inspect(w, h, state, in, insize); /*reads header and resets other parameters in state->info_png*/ -+ if(state->error) return; -+ -+ numpixels = *w * *h; -+ -+ /*multiplication overflow*/ -+ if(*h != 0 && numpixels / *h != *w) CERROR_RETURN(state->error, 92); -+ /*multiplication overflow possible further below. Allows up to 2^31-1 pixel -+ bytes with 16-bit RGBA, the rest is room for filter bytes.*/ -+ if(numpixels > 268435455) CERROR_RETURN(state->error, 92); -+ -+ ucvector_init(&idat); -+ chunk = &in[33]; /*first byte of the first chunk after the header*/ -+ -+ /*loop through the chunks, ignoring unknown chunks and stopping at IEND chunk. -+ IDAT data is put at the start of the in buffer*/ -+ while(!IEND && !state->error) -+ { -+ unsigned chunkLength; -+ const unsigned char* data; /*the data in the chunk*/ -+ -+ /*error: size of the in buffer too small to contain next chunk*/ -+ if((size_t)((chunk - in) + 12) > insize || chunk < in) CERROR_BREAK(state->error, 30); -+ -+ /*length of the data of the chunk, excluding the length bytes, chunk type and CRC bytes*/ -+ chunkLength = lodepng_chunk_length(chunk); -+ /*error: chunk length larger than the max PNG chunk size*/ -+ if(chunkLength > 2147483647) CERROR_BREAK(state->error, 63); -+ -+ if((size_t)((chunk - in) + chunkLength + 12) > insize || (chunk + chunkLength + 12) < in) -+ { -+ CERROR_BREAK(state->error, 64); /*error: size of the in buffer too small to contain next chunk*/ -+ } -+ -+ data = lodepng_chunk_data_const(chunk); -+ -+ /*IDAT chunk, containing compressed image data*/ -+ if(lodepng_chunk_type_equals(chunk, "IDAT")) -+ { -+ size_t oldsize = idat.size; -+ if(!ucvector_resize(&idat, oldsize + chunkLength)) CERROR_BREAK(state->error, 83 /*alloc fail*/); -+ for(i = 0; i != chunkLength; ++i) idat.data[oldsize + i] = data[i]; -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ critical_pos = 3; -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ } -+ /*IEND chunk*/ -+ else if(lodepng_chunk_type_equals(chunk, "IEND")) -+ { -+ IEND = 1; -+ } -+ /*palette chunk (PLTE)*/ -+ else if(lodepng_chunk_type_equals(chunk, "PLTE")) -+ { -+ state->error = readChunk_PLTE(&state->info_png.color, data, chunkLength); -+ if(state->error) break; -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ critical_pos = 2; -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ } -+ /*palette transparency chunk (tRNS)*/ -+ else if(lodepng_chunk_type_equals(chunk, "tRNS")) -+ { -+ state->error = readChunk_tRNS(&state->info_png.color, data, chunkLength); -+ if(state->error) break; -+ } -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ /*background color chunk (bKGD)*/ -+ else if(lodepng_chunk_type_equals(chunk, "bKGD")) -+ { -+ state->error = readChunk_bKGD(&state->info_png, data, chunkLength); -+ if(state->error) break; -+ } -+ /*text chunk (tEXt)*/ -+ else if(lodepng_chunk_type_equals(chunk, "tEXt")) -+ { -+ if(state->decoder.read_text_chunks) -+ { -+ state->error = readChunk_tEXt(&state->info_png, data, chunkLength); -+ if(state->error) break; -+ } -+ } -+ /*compressed text chunk (zTXt)*/ -+ else if(lodepng_chunk_type_equals(chunk, "zTXt")) -+ { -+ if(state->decoder.read_text_chunks) -+ { -+ state->error = readChunk_zTXt(&state->info_png, &state->decoder.zlibsettings, data, chunkLength); -+ if(state->error) break; -+ } -+ } -+ /*international text chunk (iTXt)*/ -+ else if(lodepng_chunk_type_equals(chunk, "iTXt")) -+ { -+ if(state->decoder.read_text_chunks) -+ { -+ state->error = readChunk_iTXt(&state->info_png, &state->decoder.zlibsettings, data, chunkLength); -+ if(state->error) break; -+ } -+ } -+ else if(lodepng_chunk_type_equals(chunk, "tIME")) -+ { -+ state->error = readChunk_tIME(&state->info_png, data, chunkLength); -+ if(state->error) break; -+ } -+ else if(lodepng_chunk_type_equals(chunk, "pHYs")) -+ { -+ state->error = readChunk_pHYs(&state->info_png, data, chunkLength); -+ if(state->error) break; -+ } -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ else /*it's not an implemented chunk type, so ignore it: skip over the data*/ -+ { -+ /*error: unknown critical chunk (5th bit of first byte of chunk type is 0)*/ -+ if(!lodepng_chunk_ancillary(chunk)) CERROR_BREAK(state->error, 69); -+ -+ unknown = 1; -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ if(state->decoder.remember_unknown_chunks) -+ { -+ state->error = lodepng_chunk_append(&state->info_png.unknown_chunks_data[critical_pos - 1], -+ &state->info_png.unknown_chunks_size[critical_pos - 1], chunk); -+ if(state->error) break; -+ } -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ } -+ -+ if(!state->decoder.ignore_crc && !unknown) /*check CRC if wanted, only on known chunk types*/ -+ { -+ if(lodepng_chunk_check_crc(chunk)) CERROR_BREAK(state->error, 57); /*invalid CRC*/ -+ } -+ -+ if(!IEND) chunk = lodepng_chunk_next_const(chunk); -+ } -+ -+ ucvector_init(&scanlines); -+ /*predict output size, to allocate exact size for output buffer to avoid more dynamic allocation. -+ If the decompressed size does not match the prediction, the image must be corrupt.*/ -+ if(state->info_png.interlace_method == 0) -+ { -+ /*The extra *h is added because this are the filter bytes every scanline starts with*/ -+ predict = lodepng_get_raw_size_idat(*w, *h, &state->info_png.color) + *h; -+ } -+ else -+ { -+ /*Adam-7 interlaced: predicted size is the sum of the 7 sub-images sizes*/ -+ const LodePNGColorMode* color = &state->info_png.color; -+ predict = 0; -+ predict += lodepng_get_raw_size_idat((*w + 7) >> 3, (*h + 7) >> 3, color) + ((*h + 7) >> 3); -+ if(*w > 4) predict += lodepng_get_raw_size_idat((*w + 3) >> 3, (*h + 7) >> 3, color) + ((*h + 7) >> 3); -+ predict += lodepng_get_raw_size_idat((*w + 3) >> 2, (*h + 3) >> 3, color) + ((*h + 3) >> 3); -+ if(*w > 2) predict += lodepng_get_raw_size_idat((*w + 1) >> 2, (*h + 3) >> 2, color) + ((*h + 3) >> 2); -+ predict += lodepng_get_raw_size_idat((*w + 1) >> 1, (*h + 1) >> 2, color) + ((*h + 1) >> 2); -+ if(*w > 1) predict += lodepng_get_raw_size_idat((*w + 0) >> 1, (*h + 1) >> 1, color) + ((*h + 1) >> 1); -+ predict += lodepng_get_raw_size_idat((*w + 0), (*h + 0) >> 1, color) + ((*h + 0) >> 1); -+ } -+ if(!state->error && !ucvector_reserve(&scanlines, predict)) state->error = 83; /*alloc fail*/ -+ if(!state->error) -+ { -+ state->error = zlib_decompress(&scanlines.data, &scanlines.size, idat.data, -+ idat.size, &state->decoder.zlibsettings); -+ if(!state->error && scanlines.size != predict) state->error = 91; /*decompressed size doesn't match prediction*/ -+ } -+ ucvector_cleanup(&idat); -+ -+ if(!state->error) -+ { -+ outsize = lodepng_get_raw_size(*w, *h, &state->info_png.color); -+ *out = (unsigned char*)lodepng_malloc(outsize); -+ if(!*out) state->error = 83; /*alloc fail*/ -+ } -+ if(!state->error) -+ { -+ for(i = 0; i < outsize; i++) (*out)[i] = 0; -+ state->error = postProcessScanlines(*out, scanlines.data, *w, *h, &state->info_png); -+ } -+ ucvector_cleanup(&scanlines); -+} -+ -+unsigned lodepng_decode(unsigned char** out, unsigned* w, unsigned* h, -+ LodePNGState* state, -+ const unsigned char* in, size_t insize) -+{ -+ *out = 0; -+ decodeGeneric(out, w, h, state, in, insize); -+ if(state->error) return state->error; -+ if(!state->decoder.color_convert || lodepng_color_mode_equal(&state->info_raw, &state->info_png.color)) -+ { -+ /*same color type, no copying or converting of data needed*/ -+ /*store the info_png color settings on the info_raw so that the info_raw still reflects what colortype -+ the raw image has to the end user*/ -+ if(!state->decoder.color_convert) -+ { -+ state->error = lodepng_color_mode_copy(&state->info_raw, &state->info_png.color); -+ if(state->error) return state->error; -+ } -+ } -+ else -+ { -+ /*color conversion needed; sort of copy of the data*/ -+ unsigned char* data = *out; -+ size_t outsize; -+ -+ /*TODO: check if this works according to the statement in the documentation: "The converter can convert -+ from greyscale input color type, to 8-bit greyscale or greyscale with alpha"*/ -+ if(!(state->info_raw.colortype == LCT_RGB || state->info_raw.colortype == LCT_RGBA) -+ && !(state->info_raw.bitdepth == 8)) -+ { -+ return 56; /*unsupported color mode conversion*/ -+ } -+ -+ outsize = lodepng_get_raw_size(*w, *h, &state->info_raw); -+ *out = (unsigned char*)lodepng_malloc(outsize); -+ if(!(*out)) -+ { -+ state->error = 83; /*alloc fail*/ -+ } -+ else state->error = lodepng_convert(*out, data, &state->info_raw, -+ &state->info_png.color, *w, *h); -+ lodepng_free(data); -+ } -+ return state->error; -+} -+ -+unsigned lodepng_decode_memory(unsigned char** out, unsigned* w, unsigned* h, const unsigned char* in, -+ size_t insize, LodePNGColorType colortype, unsigned bitdepth) -+{ -+ unsigned error; -+ LodePNGState state; -+ lodepng_state_init(&state); -+ state.info_raw.colortype = colortype; -+ state.info_raw.bitdepth = bitdepth; -+ error = lodepng_decode(out, w, h, &state, in, insize); -+ lodepng_state_cleanup(&state); -+ return error; -+} -+ -+unsigned lodepng_decode32(unsigned char** out, unsigned* w, unsigned* h, const unsigned char* in, size_t insize) -+{ -+ return lodepng_decode_memory(out, w, h, in, insize, LCT_RGBA, 8); -+} -+ -+unsigned lodepng_decode24(unsigned char** out, unsigned* w, unsigned* h, const unsigned char* in, size_t insize) -+{ -+ return lodepng_decode_memory(out, w, h, in, insize, LCT_RGB, 8); -+} -+ -+#ifdef LODEPNG_COMPILE_DISK -+unsigned lodepng_decode_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename, -+ LodePNGColorType colortype, unsigned bitdepth) -+{ -+ unsigned char* buffer = 0; -+ size_t buffersize; -+ unsigned error; -+ error = lodepng_load_file(&buffer, &buffersize, filename); -+ if(!error) error = lodepng_decode_memory(out, w, h, buffer, buffersize, colortype, bitdepth); -+ lodepng_free(buffer); -+ return error; -+} -+ -+unsigned lodepng_decode32_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename) -+{ -+ return lodepng_decode_file(out, w, h, filename, LCT_RGBA, 8); -+} -+ -+unsigned lodepng_decode24_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename) -+{ -+ return lodepng_decode_file(out, w, h, filename, LCT_RGB, 8); -+} -+#endif /*LODEPNG_COMPILE_DISK*/ -+ -+void lodepng_decoder_settings_init(LodePNGDecoderSettings* settings) -+{ -+ settings->color_convert = 1; -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ settings->read_text_chunks = 1; -+ settings->remember_unknown_chunks = 0; -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ settings->ignore_crc = 0; -+ lodepng_decompress_settings_init(&settings->zlibsettings); -+} -+ -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+#if defined(LODEPNG_COMPILE_DECODER) || defined(LODEPNG_COMPILE_ENCODER) -+ -+void lodepng_state_init(LodePNGState* state) -+{ -+#ifdef LODEPNG_COMPILE_DECODER -+ lodepng_decoder_settings_init(&state->decoder); -+#endif /*LODEPNG_COMPILE_DECODER*/ -+#ifdef LODEPNG_COMPILE_ENCODER -+ lodepng_encoder_settings_init(&state->encoder); -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ lodepng_color_mode_init(&state->info_raw); -+ lodepng_info_init(&state->info_png); -+ state->error = 1; -+} -+ -+void lodepng_state_cleanup(LodePNGState* state) -+{ -+ lodepng_color_mode_cleanup(&state->info_raw); -+ lodepng_info_cleanup(&state->info_png); -+} -+ -+void lodepng_state_copy(LodePNGState* dest, const LodePNGState* source) -+{ -+ lodepng_state_cleanup(dest); -+ *dest = *source; -+ lodepng_color_mode_init(&dest->info_raw); -+ lodepng_info_init(&dest->info_png); -+ dest->error = lodepng_color_mode_copy(&dest->info_raw, &source->info_raw); if(dest->error) return; -+ dest->error = lodepng_info_copy(&dest->info_png, &source->info_png); if(dest->error) return; -+} -+ -+#endif /* defined(LODEPNG_COMPILE_DECODER) || defined(LODEPNG_COMPILE_ENCODER) */ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* / PNG Encoder / */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+/*chunkName must be string of 4 characters*/ -+static unsigned addChunk(ucvector* out, const char* chunkName, const unsigned char* data, size_t length) -+{ -+ CERROR_TRY_RETURN(lodepng_chunk_create(&out->data, &out->size, (unsigned)length, chunkName, data)); -+ out->allocsize = out->size; /*fix the allocsize again*/ -+ return 0; -+} -+ -+static void writeSignature(ucvector* out) -+{ -+ /*8 bytes PNG signature, aka the magic bytes*/ -+ ucvector_push_back(out, 137); -+ ucvector_push_back(out, 80); -+ ucvector_push_back(out, 78); -+ ucvector_push_back(out, 71); -+ ucvector_push_back(out, 13); -+ ucvector_push_back(out, 10); -+ ucvector_push_back(out, 26); -+ ucvector_push_back(out, 10); -+} -+ -+static unsigned addChunk_IHDR(ucvector* out, unsigned w, unsigned h, -+ LodePNGColorType colortype, unsigned bitdepth, unsigned interlace_method) -+{ -+ unsigned error = 0; -+ ucvector header; -+ ucvector_init(&header); -+ -+ lodepng_add32bitInt(&header, w); /*width*/ -+ lodepng_add32bitInt(&header, h); /*height*/ -+ ucvector_push_back(&header, (unsigned char)bitdepth); /*bit depth*/ -+ ucvector_push_back(&header, (unsigned char)colortype); /*color type*/ -+ ucvector_push_back(&header, 0); /*compression method*/ -+ ucvector_push_back(&header, 0); /*filter method*/ -+ ucvector_push_back(&header, interlace_method); /*interlace method*/ -+ -+ error = addChunk(out, "IHDR", header.data, header.size); -+ ucvector_cleanup(&header); -+ -+ return error; -+} -+ -+static unsigned addChunk_PLTE(ucvector* out, const LodePNGColorMode* info) -+{ -+ unsigned error = 0; -+ size_t i; -+ ucvector PLTE; -+ ucvector_init(&PLTE); -+ for(i = 0; i != info->palettesize * 4; ++i) -+ { -+ /*add all channels except alpha channel*/ -+ if(i % 4 != 3) ucvector_push_back(&PLTE, info->palette[i]); -+ } -+ error = addChunk(out, "PLTE", PLTE.data, PLTE.size); -+ ucvector_cleanup(&PLTE); -+ -+ return error; -+} -+ -+static unsigned addChunk_tRNS(ucvector* out, const LodePNGColorMode* info) -+{ -+ unsigned error = 0; -+ size_t i; -+ ucvector tRNS; -+ ucvector_init(&tRNS); -+ if(info->colortype == LCT_PALETTE) -+ { -+ size_t amount = info->palettesize; -+ /*the tail of palette values that all have 255 as alpha, does not have to be encoded*/ -+ for(i = info->palettesize; i != 0; --i) -+ { -+ if(info->palette[4 * (i - 1) + 3] == 255) --amount; -+ else break; -+ } -+ /*add only alpha channel*/ -+ for(i = 0; i != amount; ++i) ucvector_push_back(&tRNS, info->palette[4 * i + 3]); -+ } -+ else if(info->colortype == LCT_GREY) -+ { -+ if(info->key_defined) -+ { -+ ucvector_push_back(&tRNS, (unsigned char)(info->key_r >> 8)); -+ ucvector_push_back(&tRNS, (unsigned char)(info->key_r & 255)); -+ } -+ } -+ else if(info->colortype == LCT_RGB) -+ { -+ if(info->key_defined) -+ { -+ ucvector_push_back(&tRNS, (unsigned char)(info->key_r >> 8)); -+ ucvector_push_back(&tRNS, (unsigned char)(info->key_r & 255)); -+ ucvector_push_back(&tRNS, (unsigned char)(info->key_g >> 8)); -+ ucvector_push_back(&tRNS, (unsigned char)(info->key_g & 255)); -+ ucvector_push_back(&tRNS, (unsigned char)(info->key_b >> 8)); -+ ucvector_push_back(&tRNS, (unsigned char)(info->key_b & 255)); -+ } -+ } -+ -+ error = addChunk(out, "tRNS", tRNS.data, tRNS.size); -+ ucvector_cleanup(&tRNS); -+ -+ return error; -+} -+ -+static unsigned addChunk_IDAT(ucvector* out, const unsigned char* data, size_t datasize, -+ LodePNGCompressSettings* zlibsettings) -+{ -+ ucvector zlibdata; -+ unsigned error = 0; -+ -+ /*compress with the Zlib compressor*/ -+ ucvector_init(&zlibdata); -+ error = zlib_compress(&zlibdata.data, &zlibdata.size, data, datasize, zlibsettings); -+ if(!error) error = addChunk(out, "IDAT", zlibdata.data, zlibdata.size); -+ ucvector_cleanup(&zlibdata); -+ -+ return error; -+} -+ -+static unsigned addChunk_IEND(ucvector* out) -+{ -+ unsigned error = 0; -+ error = addChunk(out, "IEND", 0, 0); -+ return error; -+} -+ -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ -+static unsigned addChunk_tEXt(ucvector* out, const char* keyword, const char* textstring) -+{ -+ unsigned error = 0; -+ size_t i; -+ ucvector text; -+ ucvector_init(&text); -+ for(i = 0; keyword[i] != 0; ++i) ucvector_push_back(&text, (unsigned char)keyword[i]); -+ if(i < 1 || i > 79) return 89; /*error: invalid keyword size*/ -+ ucvector_push_back(&text, 0); /*0 termination char*/ -+ for(i = 0; textstring[i] != 0; ++i) ucvector_push_back(&text, (unsigned char)textstring[i]); -+ error = addChunk(out, "tEXt", text.data, text.size); -+ ucvector_cleanup(&text); -+ -+ return error; -+} -+ -+static unsigned addChunk_zTXt(ucvector* out, const char* keyword, const char* textstring, -+ LodePNGCompressSettings* zlibsettings) -+{ -+ unsigned error = 0; -+ ucvector data, compressed; -+ size_t i, textsize = strlen(textstring); -+ -+ ucvector_init(&data); -+ ucvector_init(&compressed); -+ for(i = 0; keyword[i] != 0; ++i) ucvector_push_back(&data, (unsigned char)keyword[i]); -+ if(i < 1 || i > 79) return 89; /*error: invalid keyword size*/ -+ ucvector_push_back(&data, 0); /*0 termination char*/ -+ ucvector_push_back(&data, 0); /*compression method: 0*/ -+ -+ error = zlib_compress(&compressed.data, &compressed.size, -+ (unsigned char*)textstring, textsize, zlibsettings); -+ if(!error) -+ { -+ for(i = 0; i != compressed.size; ++i) ucvector_push_back(&data, compressed.data[i]); -+ error = addChunk(out, "zTXt", data.data, data.size); -+ } -+ -+ ucvector_cleanup(&compressed); -+ ucvector_cleanup(&data); -+ return error; -+} -+ -+static unsigned addChunk_iTXt(ucvector* out, unsigned compressed, const char* keyword, const char* langtag, -+ const char* transkey, const char* textstring, LodePNGCompressSettings* zlibsettings) -+{ -+ unsigned error = 0; -+ ucvector data; -+ size_t i, textsize = strlen(textstring); -+ -+ ucvector_init(&data); -+ -+ for(i = 0; keyword[i] != 0; ++i) ucvector_push_back(&data, (unsigned char)keyword[i]); -+ if(i < 1 || i > 79) return 89; /*error: invalid keyword size*/ -+ ucvector_push_back(&data, 0); /*null termination char*/ -+ ucvector_push_back(&data, compressed ? 1 : 0); /*compression flag*/ -+ ucvector_push_back(&data, 0); /*compression method*/ -+ for(i = 0; langtag[i] != 0; ++i) ucvector_push_back(&data, (unsigned char)langtag[i]); -+ ucvector_push_back(&data, 0); /*null termination char*/ -+ for(i = 0; transkey[i] != 0; ++i) ucvector_push_back(&data, (unsigned char)transkey[i]); -+ ucvector_push_back(&data, 0); /*null termination char*/ -+ -+ if(compressed) -+ { -+ ucvector compressed_data; -+ ucvector_init(&compressed_data); -+ error = zlib_compress(&compressed_data.data, &compressed_data.size, -+ (unsigned char*)textstring, textsize, zlibsettings); -+ if(!error) -+ { -+ for(i = 0; i != compressed_data.size; ++i) ucvector_push_back(&data, compressed_data.data[i]); -+ } -+ ucvector_cleanup(&compressed_data); -+ } -+ else /*not compressed*/ -+ { -+ for(i = 0; textstring[i] != 0; ++i) ucvector_push_back(&data, (unsigned char)textstring[i]); -+ } -+ -+ if(!error) error = addChunk(out, "iTXt", data.data, data.size); -+ ucvector_cleanup(&data); -+ return error; -+} -+ -+static unsigned addChunk_bKGD(ucvector* out, const LodePNGInfo* info) -+{ -+ unsigned error = 0; -+ ucvector bKGD; -+ ucvector_init(&bKGD); -+ if(info->color.colortype == LCT_GREY || info->color.colortype == LCT_GREY_ALPHA) -+ { -+ ucvector_push_back(&bKGD, (unsigned char)(info->background_r >> 8)); -+ ucvector_push_back(&bKGD, (unsigned char)(info->background_r & 255)); -+ } -+ else if(info->color.colortype == LCT_RGB || info->color.colortype == LCT_RGBA) -+ { -+ ucvector_push_back(&bKGD, (unsigned char)(info->background_r >> 8)); -+ ucvector_push_back(&bKGD, (unsigned char)(info->background_r & 255)); -+ ucvector_push_back(&bKGD, (unsigned char)(info->background_g >> 8)); -+ ucvector_push_back(&bKGD, (unsigned char)(info->background_g & 255)); -+ ucvector_push_back(&bKGD, (unsigned char)(info->background_b >> 8)); -+ ucvector_push_back(&bKGD, (unsigned char)(info->background_b & 255)); -+ } -+ else if(info->color.colortype == LCT_PALETTE) -+ { -+ ucvector_push_back(&bKGD, (unsigned char)(info->background_r & 255)); /*palette index*/ -+ } -+ -+ error = addChunk(out, "bKGD", bKGD.data, bKGD.size); -+ ucvector_cleanup(&bKGD); -+ -+ return error; -+} -+ -+static unsigned addChunk_tIME(ucvector* out, const LodePNGTime* time) -+{ -+ unsigned error = 0; -+ unsigned char* data = (unsigned char*)lodepng_malloc(7); -+ if(!data) return 83; /*alloc fail*/ -+ data[0] = (unsigned char)(time->year >> 8); -+ data[1] = (unsigned char)(time->year & 255); -+ data[2] = (unsigned char)time->month; -+ data[3] = (unsigned char)time->day; -+ data[4] = (unsigned char)time->hour; -+ data[5] = (unsigned char)time->minute; -+ data[6] = (unsigned char)time->second; -+ error = addChunk(out, "tIME", data, 7); -+ lodepng_free(data); -+ return error; -+} -+ -+static unsigned addChunk_pHYs(ucvector* out, const LodePNGInfo* info) -+{ -+ unsigned error = 0; -+ ucvector data; -+ ucvector_init(&data); -+ -+ lodepng_add32bitInt(&data, info->phys_x); -+ lodepng_add32bitInt(&data, info->phys_y); -+ ucvector_push_back(&data, info->phys_unit); -+ -+ error = addChunk(out, "pHYs", data.data, data.size); -+ ucvector_cleanup(&data); -+ -+ return error; -+} -+ -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ -+static void filterScanline(unsigned char* out, const unsigned char* scanline, const unsigned char* prevline, -+ size_t length, size_t bytewidth, unsigned char filterType) -+{ -+ size_t i; -+ switch(filterType) -+ { -+ case 0: /*None*/ -+ for(i = 0; i != length; ++i) out[i] = scanline[i]; -+ break; -+ case 1: /*Sub*/ -+ for(i = 0; i != bytewidth; ++i) out[i] = scanline[i]; -+ for(i = bytewidth; i < length; ++i) out[i] = scanline[i] - scanline[i - bytewidth]; -+ break; -+ case 2: /*Up*/ -+ if(prevline) -+ { -+ for(i = 0; i != length; ++i) out[i] = scanline[i] - prevline[i]; -+ } -+ else -+ { -+ for(i = 0; i != length; ++i) out[i] = scanline[i]; -+ } -+ break; -+ case 3: /*Average*/ -+ if(prevline) -+ { -+ for(i = 0; i != bytewidth; ++i) out[i] = scanline[i] - (prevline[i] >> 1); -+ for(i = bytewidth; i < length; ++i) out[i] = scanline[i] - ((scanline[i - bytewidth] + prevline[i]) >> 1); -+ } -+ else -+ { -+ for(i = 0; i != bytewidth; ++i) out[i] = scanline[i]; -+ for(i = bytewidth; i < length; ++i) out[i] = scanline[i] - (scanline[i - bytewidth] >> 1); -+ } -+ break; -+ case 4: /*Paeth*/ -+ if(prevline) -+ { -+ /*paethPredictor(0, prevline[i], 0) is always prevline[i]*/ -+ for(i = 0; i != bytewidth; ++i) out[i] = (scanline[i] - prevline[i]); -+ for(i = bytewidth; i < length; ++i) -+ { -+ out[i] = (scanline[i] - paethPredictor(scanline[i - bytewidth], prevline[i], prevline[i - bytewidth])); -+ } -+ } -+ else -+ { -+ for(i = 0; i != bytewidth; ++i) out[i] = scanline[i]; -+ /*paethPredictor(scanline[i - bytewidth], 0, 0) is always scanline[i - bytewidth]*/ -+ for(i = bytewidth; i < length; ++i) out[i] = (scanline[i] - scanline[i - bytewidth]); -+ } -+ break; -+ default: return; /*unexisting filter type given*/ -+ } -+} -+ -+/* log2 approximation. A slight bit faster than std::log. */ -+static float flog2(float f) -+{ -+ float result = 0; -+ while(f > 32) { result += 4; f /= 16; } -+ while(f > 2) { ++result; f /= 2; } -+ return result + 1.442695f * (f * f * f / 3 - 3 * f * f / 2 + 3 * f - 1.83333f); -+} -+ -+static unsigned filter(unsigned char* out, const unsigned char* in, unsigned w, unsigned h, -+ const LodePNGColorMode* info, const LodePNGEncoderSettings* settings) -+{ -+ /* -+ For PNG filter method 0 -+ out must be a buffer with as size: h + (w * h * bpp + 7) / 8, because there are -+ the scanlines with 1 extra byte per scanline -+ */ -+ -+ unsigned bpp = lodepng_get_bpp(info); -+ /*the width of a scanline in bytes, not including the filter type*/ -+ size_t linebytes = (w * bpp + 7) / 8; -+ /*bytewidth is used for filtering, is 1 when bpp < 8, number of bytes per pixel otherwise*/ -+ size_t bytewidth = (bpp + 7) / 8; -+ const unsigned char* prevline = 0; -+ unsigned x, y; -+ unsigned error = 0; -+ LodePNGFilterStrategy strategy = settings->filter_strategy; -+ -+ /* -+ There is a heuristic called the minimum sum of absolute differences heuristic, suggested by the PNG standard: -+ * If the image type is Palette, or the bit depth is smaller than 8, then do not filter the image (i.e. -+ use fixed filtering, with the filter None). -+ * (The other case) If the image type is Grayscale or RGB (with or without Alpha), and the bit depth is -+ not smaller than 8, then use adaptive filtering heuristic as follows: independently for each row, apply -+ all five filters and select the filter that produces the smallest sum of absolute values per row. -+ This heuristic is used if filter strategy is LFS_MINSUM and filter_palette_zero is true. -+ -+ If filter_palette_zero is true and filter_strategy is not LFS_MINSUM, the above heuristic is followed, -+ but for "the other case", whatever strategy filter_strategy is set to instead of the minimum sum -+ heuristic is used. -+ */ -+ if(settings->filter_palette_zero && -+ (info->colortype == LCT_PALETTE || info->bitdepth < 8)) strategy = LFS_ZERO; -+ -+ if(bpp == 0) return 31; /*error: invalid color type*/ -+ -+ if(strategy == LFS_ZERO) -+ { -+ for(y = 0; y != h; ++y) -+ { -+ size_t outindex = (1 + linebytes) * y; /*the extra filterbyte added to each row*/ -+ size_t inindex = linebytes * y; -+ out[outindex] = 0; /*filter type byte*/ -+ filterScanline(&out[outindex + 1], &in[inindex], prevline, linebytes, bytewidth, 0); -+ prevline = &in[inindex]; -+ } -+ } -+ else if(strategy == LFS_MINSUM) -+ { -+ /*adaptive filtering*/ -+ size_t sum[5]; -+ unsigned char* attempt[5]; /*five filtering attempts, one for each filter type*/ -+ size_t smallest = 0; -+ unsigned char type, bestType = 0; -+ -+ for(type = 0; type != 5; ++type) -+ { -+ attempt[type] = (unsigned char*)lodepng_malloc(linebytes); -+ if(!attempt[type]) return 83; /*alloc fail*/ -+ } -+ -+ if(!error) -+ { -+ for(y = 0; y != h; ++y) -+ { -+ /*try the 5 filter types*/ -+ for(type = 0; type != 5; ++type) -+ { -+ filterScanline(attempt[type], &in[y * linebytes], prevline, linebytes, bytewidth, type); -+ -+ /*calculate the sum of the result*/ -+ sum[type] = 0; -+ if(type == 0) -+ { -+ for(x = 0; x != linebytes; ++x) sum[type] += (unsigned char)(attempt[type][x]); -+ } -+ else -+ { -+ for(x = 0; x != linebytes; ++x) -+ { -+ /*For differences, each byte should be treated as signed, values above 127 are negative -+ (converted to signed char). Filtertype 0 isn't a difference though, so use unsigned there. -+ This means filtertype 0 is almost never chosen, but that is justified.*/ -+ unsigned char s = attempt[type][x]; -+ sum[type] += s < 128 ? s : (255U - s); -+ } -+ } -+ -+ /*check if this is smallest sum (or if type == 0 it's the first case so always store the values)*/ -+ if(type == 0 || sum[type] < smallest) -+ { -+ bestType = type; -+ smallest = sum[type]; -+ } -+ } -+ -+ prevline = &in[y * linebytes]; -+ -+ /*now fill the out values*/ -+ out[y * (linebytes + 1)] = bestType; /*the first byte of a scanline will be the filter type*/ -+ for(x = 0; x != linebytes; ++x) out[y * (linebytes + 1) + 1 + x] = attempt[bestType][x]; -+ } -+ } -+ -+ for(type = 0; type != 5; ++type) lodepng_free(attempt[type]); -+ } -+ else if(strategy == LFS_ENTROPY) -+ { -+ float sum[5]; -+ unsigned char* attempt[5]; /*five filtering attempts, one for each filter type*/ -+ float smallest = 0; -+ unsigned type, bestType = 0; -+ unsigned count[256]; -+ -+ for(type = 0; type != 5; ++type) -+ { -+ attempt[type] = (unsigned char*)lodepng_malloc(linebytes); -+ if(!attempt[type]) return 83; /*alloc fail*/ -+ } -+ -+ for(y = 0; y != h; ++y) -+ { -+ /*try the 5 filter types*/ -+ for(type = 0; type != 5; ++type) -+ { -+ filterScanline(attempt[type], &in[y * linebytes], prevline, linebytes, bytewidth, type); -+ for(x = 0; x != 256; ++x) count[x] = 0; -+ for(x = 0; x != linebytes; ++x) ++count[attempt[type][x]]; -+ ++count[type]; /*the filter type itself is part of the scanline*/ -+ sum[type] = 0; -+ for(x = 0; x != 256; ++x) -+ { -+ float p = count[x] / (float)(linebytes + 1); -+ sum[type] += count[x] == 0 ? 0 : flog2(1 / p) * p; -+ } -+ /*check if this is smallest sum (or if type == 0 it's the first case so always store the values)*/ -+ if(type == 0 || sum[type] < smallest) -+ { -+ bestType = type; -+ smallest = sum[type]; -+ } -+ } -+ -+ prevline = &in[y * linebytes]; -+ -+ /*now fill the out values*/ -+ out[y * (linebytes + 1)] = bestType; /*the first byte of a scanline will be the filter type*/ -+ for(x = 0; x != linebytes; ++x) out[y * (linebytes + 1) + 1 + x] = attempt[bestType][x]; -+ } -+ -+ for(type = 0; type != 5; ++type) lodepng_free(attempt[type]); -+ } -+ else if(strategy == LFS_PREDEFINED) -+ { -+ for(y = 0; y != h; ++y) -+ { -+ size_t outindex = (1 + linebytes) * y; /*the extra filterbyte added to each row*/ -+ size_t inindex = linebytes * y; -+ unsigned char type = settings->predefined_filters[y]; -+ out[outindex] = type; /*filter type byte*/ -+ filterScanline(&out[outindex + 1], &in[inindex], prevline, linebytes, bytewidth, type); -+ prevline = &in[inindex]; -+ } -+ } -+ else if(strategy == LFS_BRUTE_FORCE) -+ { -+ /*brute force filter chooser. -+ deflate the scanline after every filter attempt to see which one deflates best. -+ This is very slow and gives only slightly smaller, sometimes even larger, result*/ -+ size_t size[5]; -+ unsigned char* attempt[5]; /*five filtering attempts, one for each filter type*/ -+ size_t smallest = 0; -+ unsigned type = 0, bestType = 0; -+ unsigned char* dummy; -+ LodePNGCompressSettings zlibsettings = settings->zlibsettings; -+ /*use fixed tree on the attempts so that the tree is not adapted to the filtertype on purpose, -+ to simulate the true case where the tree is the same for the whole image. Sometimes it gives -+ better result with dynamic tree anyway. Using the fixed tree sometimes gives worse, but in rare -+ cases better compression. It does make this a bit less slow, so it's worth doing this.*/ -+ zlibsettings.btype = 1; -+ /*a custom encoder likely doesn't read the btype setting and is optimized for complete PNG -+ images only, so disable it*/ -+ zlibsettings.custom_zlib = 0; -+ zlibsettings.custom_deflate = 0; -+ for(type = 0; type != 5; ++type) -+ { -+ attempt[type] = (unsigned char*)lodepng_malloc(linebytes); -+ if(!attempt[type]) return 83; /*alloc fail*/ -+ } -+ for(y = 0; y != h; ++y) /*try the 5 filter types*/ -+ { -+ for(type = 0; type != 5; ++type) -+ { -+ unsigned testsize = linebytes; -+ /*if(testsize > 8) testsize /= 8;*/ /*it already works good enough by testing a part of the row*/ -+ -+ filterScanline(attempt[type], &in[y * linebytes], prevline, linebytes, bytewidth, type); -+ size[type] = 0; -+ dummy = 0; -+ zlib_compress(&dummy, &size[type], attempt[type], testsize, &zlibsettings); -+ lodepng_free(dummy); -+ /*check if this is smallest size (or if type == 0 it's the first case so always store the values)*/ -+ if(type == 0 || size[type] < smallest) -+ { -+ bestType = type; -+ smallest = size[type]; -+ } -+ } -+ prevline = &in[y * linebytes]; -+ out[y * (linebytes + 1)] = bestType; /*the first byte of a scanline will be the filter type*/ -+ for(x = 0; x != linebytes; ++x) out[y * (linebytes + 1) + 1 + x] = attempt[bestType][x]; -+ } -+ for(type = 0; type != 5; ++type) lodepng_free(attempt[type]); -+ } -+ else return 88; /* unknown filter strategy */ -+ -+ return error; -+} -+ -+static void addPaddingBits(unsigned char* out, const unsigned char* in, -+ size_t olinebits, size_t ilinebits, unsigned h) -+{ -+ /*The opposite of the removePaddingBits function -+ olinebits must be >= ilinebits*/ -+ unsigned y; -+ size_t diff = olinebits - ilinebits; -+ size_t obp = 0, ibp = 0; /*bit pointers*/ -+ for(y = 0; y != h; ++y) -+ { -+ size_t x; -+ for(x = 0; x < ilinebits; ++x) -+ { -+ unsigned char bit = readBitFromReversedStream(&ibp, in); -+ setBitOfReversedStream(&obp, out, bit); -+ } -+ /*obp += diff; --> no, fill in some value in the padding bits too, to avoid -+ "Use of uninitialised value of size ###" warning from valgrind*/ -+ for(x = 0; x != diff; ++x) setBitOfReversedStream(&obp, out, 0); -+ } -+} -+ -+/* -+in: non-interlaced image with size w*h -+out: the same pixels, but re-ordered according to PNG's Adam7 interlacing, with -+ no padding bits between scanlines, but between reduced images so that each -+ reduced image starts at a byte. -+bpp: bits per pixel -+there are no padding bits, not between scanlines, not between reduced images -+in has the following size in bits: w * h * bpp. -+out is possibly bigger due to padding bits between reduced images -+NOTE: comments about padding bits are only relevant if bpp < 8 -+*/ -+static void Adam7_interlace(unsigned char* out, const unsigned char* in, unsigned w, unsigned h, unsigned bpp) -+{ -+ unsigned passw[7], passh[7]; -+ size_t filter_passstart[8], padded_passstart[8], passstart[8]; -+ unsigned i; -+ -+ Adam7_getpassvalues(passw, passh, filter_passstart, padded_passstart, passstart, w, h, bpp); -+ -+ if(bpp >= 8) -+ { -+ for(i = 0; i != 7; ++i) -+ { -+ unsigned x, y, b; -+ size_t bytewidth = bpp / 8; -+ for(y = 0; y < passh[i]; ++y) -+ for(x = 0; x < passw[i]; ++x) -+ { -+ size_t pixelinstart = ((ADAM7_IY[i] + y * ADAM7_DY[i]) * w + ADAM7_IX[i] + x * ADAM7_DX[i]) * bytewidth; -+ size_t pixeloutstart = passstart[i] + (y * passw[i] + x) * bytewidth; -+ for(b = 0; b < bytewidth; ++b) -+ { -+ out[pixeloutstart + b] = in[pixelinstart + b]; -+ } -+ } -+ } -+ } -+ else /*bpp < 8: Adam7 with pixels < 8 bit is a bit trickier: with bit pointers*/ -+ { -+ for(i = 0; i != 7; ++i) -+ { -+ unsigned x, y, b; -+ unsigned ilinebits = bpp * passw[i]; -+ unsigned olinebits = bpp * w; -+ size_t obp, ibp; /*bit pointers (for out and in buffer)*/ -+ for(y = 0; y < passh[i]; ++y) -+ for(x = 0; x < passw[i]; ++x) -+ { -+ ibp = (ADAM7_IY[i] + y * ADAM7_DY[i]) * olinebits + (ADAM7_IX[i] + x * ADAM7_DX[i]) * bpp; -+ obp = (8 * passstart[i]) + (y * ilinebits + x * bpp); -+ for(b = 0; b < bpp; ++b) -+ { -+ unsigned char bit = readBitFromReversedStream(&ibp, in); -+ setBitOfReversedStream(&obp, out, bit); -+ } -+ } -+ } -+ } -+} -+ -+/*out must be buffer big enough to contain uncompressed IDAT chunk data, and in must contain the full image. -+return value is error**/ -+static unsigned preProcessScanlines(unsigned char** out, size_t* outsize, const unsigned char* in, -+ unsigned w, unsigned h, -+ const LodePNGInfo* info_png, const LodePNGEncoderSettings* settings) -+{ -+ /* -+ This function converts the pure 2D image with the PNG's colortype, into filtered-padded-interlaced data. Steps: -+ *) if no Adam7: 1) add padding bits (= posible extra bits per scanline if bpp < 8) 2) filter -+ *) if adam7: 1) Adam7_interlace 2) 7x add padding bits 3) 7x filter -+ */ -+ unsigned bpp = lodepng_get_bpp(&info_png->color); -+ unsigned error = 0; -+ -+ if(info_png->interlace_method == 0) -+ { -+ *outsize = h + (h * ((w * bpp + 7) / 8)); /*image size plus an extra byte per scanline + possible padding bits*/ -+ *out = (unsigned char*)lodepng_malloc(*outsize); -+ if(!(*out) && (*outsize)) error = 83; /*alloc fail*/ -+ -+ if(!error) -+ { -+ /*non multiple of 8 bits per scanline, padding bits needed per scanline*/ -+ if(bpp < 8 && w * bpp != ((w * bpp + 7) / 8) * 8) -+ { -+ unsigned char* padded = (unsigned char*)lodepng_malloc(h * ((w * bpp + 7) / 8)); -+ if(!padded) error = 83; /*alloc fail*/ -+ if(!error) -+ { -+ addPaddingBits(padded, in, ((w * bpp + 7) / 8) * 8, w * bpp, h); -+ error = filter(*out, padded, w, h, &info_png->color, settings); -+ } -+ lodepng_free(padded); -+ } -+ else -+ { -+ /*we can immediately filter into the out buffer, no other steps needed*/ -+ error = filter(*out, in, w, h, &info_png->color, settings); -+ } -+ } -+ } -+ else /*interlace_method is 1 (Adam7)*/ -+ { -+ unsigned passw[7], passh[7]; -+ size_t filter_passstart[8], padded_passstart[8], passstart[8]; -+ unsigned char* adam7; -+ -+ Adam7_getpassvalues(passw, passh, filter_passstart, padded_passstart, passstart, w, h, bpp); -+ -+ *outsize = filter_passstart[7]; /*image size plus an extra byte per scanline + possible padding bits*/ -+ *out = (unsigned char*)lodepng_malloc(*outsize); -+ if(!(*out)) error = 83; /*alloc fail*/ -+ -+ adam7 = (unsigned char*)lodepng_malloc(passstart[7]); -+ if(!adam7 && passstart[7]) error = 83; /*alloc fail*/ -+ -+ if(!error) -+ { -+ unsigned i; -+ -+ Adam7_interlace(adam7, in, w, h, bpp); -+ for(i = 0; i != 7; ++i) -+ { -+ if(bpp < 8) -+ { -+ unsigned char* padded = (unsigned char*)lodepng_malloc(padded_passstart[i + 1] - padded_passstart[i]); -+ if(!padded) ERROR_BREAK(83); /*alloc fail*/ -+ addPaddingBits(padded, &adam7[passstart[i]], -+ ((passw[i] * bpp + 7) / 8) * 8, passw[i] * bpp, passh[i]); -+ error = filter(&(*out)[filter_passstart[i]], padded, -+ passw[i], passh[i], &info_png->color, settings); -+ lodepng_free(padded); -+ } -+ else -+ { -+ error = filter(&(*out)[filter_passstart[i]], &adam7[padded_passstart[i]], -+ passw[i], passh[i], &info_png->color, settings); -+ } -+ -+ if(error) break; -+ } -+ } -+ -+ lodepng_free(adam7); -+ } -+ -+ return error; -+} -+ -+/* -+palette must have 4 * palettesize bytes allocated, and given in format RGBARGBARGBARGBA... -+returns 0 if the palette is opaque, -+returns 1 if the palette has a single color with alpha 0 ==> color key -+returns 2 if the palette is semi-translucent. -+*/ -+static unsigned getPaletteTranslucency(const unsigned char* palette, size_t palettesize) -+{ -+ size_t i; -+ unsigned key = 0; -+ unsigned r = 0, g = 0, b = 0; /*the value of the color with alpha 0, so long as color keying is possible*/ -+ for(i = 0; i != palettesize; ++i) -+ { -+ if(!key && palette[4 * i + 3] == 0) -+ { -+ r = palette[4 * i + 0]; g = palette[4 * i + 1]; b = palette[4 * i + 2]; -+ key = 1; -+ i = (size_t)(-1); /*restart from beginning, to detect earlier opaque colors with key's value*/ -+ } -+ else if(palette[4 * i + 3] != 255) return 2; -+ /*when key, no opaque RGB may have key's RGB*/ -+ else if(key && r == palette[i * 4 + 0] && g == palette[i * 4 + 1] && b == palette[i * 4 + 2]) return 2; -+ } -+ return key; -+} -+ -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+static unsigned addUnknownChunks(ucvector* out, unsigned char* data, size_t datasize) -+{ -+ unsigned char* inchunk = data; -+ while((size_t)(inchunk - data) < datasize) -+ { -+ CERROR_TRY_RETURN(lodepng_chunk_append(&out->data, &out->size, inchunk)); -+ out->allocsize = out->size; /*fix the allocsize again*/ -+ inchunk = lodepng_chunk_next(inchunk); -+ } -+ return 0; -+} -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ -+unsigned lodepng_encode(unsigned char** out, size_t* outsize, -+ const unsigned char* image, unsigned w, unsigned h, -+ LodePNGState* state) -+{ -+ LodePNGInfo info; -+ ucvector outv; -+ unsigned char* data = 0; /*uncompressed version of the IDAT chunk data*/ -+ size_t datasize = 0; -+ -+ /*provide some proper output values if error will happen*/ -+ *out = 0; -+ *outsize = 0; -+ state->error = 0; -+ -+ lodepng_info_init(&info); -+ lodepng_info_copy(&info, &state->info_png); -+ -+ if((info.color.colortype == LCT_PALETTE || state->encoder.force_palette) -+ && (info.color.palettesize == 0 || info.color.palettesize > 256)) -+ { -+ state->error = 68; /*invalid palette size, it is only allowed to be 1-256*/ -+ return state->error; -+ } -+ -+ if(state->encoder.auto_convert) -+ { -+ state->error = lodepng_auto_choose_color(&info.color, image, w, h, &state->info_raw); -+ } -+ if(state->error) return state->error; -+ -+ if(state->encoder.zlibsettings.btype > 2) -+ { -+ CERROR_RETURN_ERROR(state->error, 61); /*error: unexisting btype*/ -+ } -+ if(state->info_png.interlace_method > 1) -+ { -+ CERROR_RETURN_ERROR(state->error, 71); /*error: unexisting interlace mode*/ -+ } -+ -+ state->error = checkColorValidity(info.color.colortype, info.color.bitdepth); -+ if(state->error) return state->error; /*error: unexisting color type given*/ -+ state->error = checkColorValidity(state->info_raw.colortype, state->info_raw.bitdepth); -+ if(state->error) return state->error; /*error: unexisting color type given*/ -+ -+ if(!lodepng_color_mode_equal(&state->info_raw, &info.color)) -+ { -+ unsigned char* converted; -+ size_t size = (w * h * lodepng_get_bpp(&info.color) + 7) / 8; -+ -+ converted = (unsigned char*)lodepng_malloc(size); -+ if(!converted && size) state->error = 83; /*alloc fail*/ -+ if(!state->error) -+ { -+ state->error = lodepng_convert(converted, image, &info.color, &state->info_raw, w, h); -+ } -+ if(!state->error) preProcessScanlines(&data, &datasize, converted, w, h, &info, &state->encoder); -+ lodepng_free(converted); -+ } -+ else preProcessScanlines(&data, &datasize, image, w, h, &info, &state->encoder); -+ -+ ucvector_init(&outv); -+ while(!state->error) /*while only executed once, to break on error*/ -+ { -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ size_t i; -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ /*write signature and chunks*/ -+ writeSignature(&outv); -+ /*IHDR*/ -+ addChunk_IHDR(&outv, w, h, info.color.colortype, info.color.bitdepth, info.interlace_method); -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ /*unknown chunks between IHDR and PLTE*/ -+ if(info.unknown_chunks_data[0]) -+ { -+ state->error = addUnknownChunks(&outv, info.unknown_chunks_data[0], info.unknown_chunks_size[0]); -+ if(state->error) break; -+ } -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ /*PLTE*/ -+ if(info.color.colortype == LCT_PALETTE) -+ { -+ addChunk_PLTE(&outv, &info.color); -+ } -+ if(state->encoder.force_palette && (info.color.colortype == LCT_RGB || info.color.colortype == LCT_RGBA)) -+ { -+ addChunk_PLTE(&outv, &info.color); -+ } -+ /*tRNS*/ -+ if(info.color.colortype == LCT_PALETTE && getPaletteTranslucency(info.color.palette, info.color.palettesize) != 0) -+ { -+ addChunk_tRNS(&outv, &info.color); -+ } -+ if((info.color.colortype == LCT_GREY || info.color.colortype == LCT_RGB) && info.color.key_defined) -+ { -+ addChunk_tRNS(&outv, &info.color); -+ } -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ /*bKGD (must come between PLTE and the IDAt chunks*/ -+ if(info.background_defined) addChunk_bKGD(&outv, &info); -+ /*pHYs (must come before the IDAT chunks)*/ -+ if(info.phys_defined) addChunk_pHYs(&outv, &info); -+ -+ /*unknown chunks between PLTE and IDAT*/ -+ if(info.unknown_chunks_data[1]) -+ { -+ state->error = addUnknownChunks(&outv, info.unknown_chunks_data[1], info.unknown_chunks_size[1]); -+ if(state->error) break; -+ } -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ /*IDAT (multiple IDAT chunks must be consecutive)*/ -+ state->error = addChunk_IDAT(&outv, data, datasize, &state->encoder.zlibsettings); -+ if(state->error) break; -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ /*tIME*/ -+ if(info.time_defined) addChunk_tIME(&outv, &info.time); -+ /*tEXt and/or zTXt*/ -+ for(i = 0; i != info.text_num; ++i) -+ { -+ if(strlen(info.text_keys[i]) > 79) -+ { -+ state->error = 66; /*text chunk too large*/ -+ break; -+ } -+ if(strlen(info.text_keys[i]) < 1) -+ { -+ state->error = 67; /*text chunk too small*/ -+ break; -+ } -+ if(state->encoder.text_compression) -+ { -+ addChunk_zTXt(&outv, info.text_keys[i], info.text_strings[i], &state->encoder.zlibsettings); -+ } -+ else -+ { -+ addChunk_tEXt(&outv, info.text_keys[i], info.text_strings[i]); -+ } -+ } -+ /*LodePNG version id in text chunk*/ -+ if(state->encoder.add_id) -+ { -+ unsigned alread_added_id_text = 0; -+ for(i = 0; i != info.text_num; ++i) -+ { -+ if(!strcmp(info.text_keys[i], "LodePNG")) -+ { -+ alread_added_id_text = 1; -+ break; -+ } -+ } -+ if(alread_added_id_text == 0) -+ { -+ addChunk_tEXt(&outv, "LodePNG", LODEPNG_VERSION_STRING); /*it's shorter as tEXt than as zTXt chunk*/ -+ } -+ } -+ /*iTXt*/ -+ for(i = 0; i != info.itext_num; ++i) -+ { -+ if(strlen(info.itext_keys[i]) > 79) -+ { -+ state->error = 66; /*text chunk too large*/ -+ break; -+ } -+ if(strlen(info.itext_keys[i]) < 1) -+ { -+ state->error = 67; /*text chunk too small*/ -+ break; -+ } -+ addChunk_iTXt(&outv, state->encoder.text_compression, -+ info.itext_keys[i], info.itext_langtags[i], info.itext_transkeys[i], info.itext_strings[i], -+ &state->encoder.zlibsettings); -+ } -+ -+ /*unknown chunks between IDAT and IEND*/ -+ if(info.unknown_chunks_data[2]) -+ { -+ state->error = addUnknownChunks(&outv, info.unknown_chunks_data[2], info.unknown_chunks_size[2]); -+ if(state->error) break; -+ } -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ addChunk_IEND(&outv); -+ -+ break; /*this isn't really a while loop; no error happened so break out now!*/ -+ } -+ -+ lodepng_info_cleanup(&info); -+ lodepng_free(data); -+ /*instead of cleaning the vector up, give it to the output*/ -+ *out = outv.data; -+ *outsize = outv.size; -+ -+ return state->error; -+} -+ -+unsigned lodepng_encode_memory(unsigned char** out, size_t* outsize, const unsigned char* image, -+ unsigned w, unsigned h, LodePNGColorType colortype, unsigned bitdepth) -+{ -+ unsigned error; -+ LodePNGState state; -+ lodepng_state_init(&state); -+ state.info_raw.colortype = colortype; -+ state.info_raw.bitdepth = bitdepth; -+ state.info_png.color.colortype = colortype; -+ state.info_png.color.bitdepth = bitdepth; -+ lodepng_encode(out, outsize, image, w, h, &state); -+ error = state.error; -+ lodepng_state_cleanup(&state); -+ return error; -+} -+ -+unsigned lodepng_encode32(unsigned char** out, size_t* outsize, const unsigned char* image, unsigned w, unsigned h) -+{ -+ return lodepng_encode_memory(out, outsize, image, w, h, LCT_RGBA, 8); -+} -+ -+unsigned lodepng_encode24(unsigned char** out, size_t* outsize, const unsigned char* image, unsigned w, unsigned h) -+{ -+ return lodepng_encode_memory(out, outsize, image, w, h, LCT_RGB, 8); -+} -+ -+#ifdef LODEPNG_COMPILE_DISK -+unsigned lodepng_encode_file(const char* filename, const unsigned char* image, unsigned w, unsigned h, -+ LodePNGColorType colortype, unsigned bitdepth) -+{ -+ unsigned char* buffer; -+ size_t buffersize; -+ unsigned error = lodepng_encode_memory(&buffer, &buffersize, image, w, h, colortype, bitdepth); -+ if(!error) error = lodepng_save_file(buffer, buffersize, filename); -+ lodepng_free(buffer); -+ return error; -+} -+ -+unsigned lodepng_encode32_file(const char* filename, const unsigned char* image, unsigned w, unsigned h) -+{ -+ return lodepng_encode_file(filename, image, w, h, LCT_RGBA, 8); -+} -+ -+unsigned lodepng_encode24_file(const char* filename, const unsigned char* image, unsigned w, unsigned h) -+{ -+ return lodepng_encode_file(filename, image, w, h, LCT_RGB, 8); -+} -+#endif /*LODEPNG_COMPILE_DISK*/ -+ -+void lodepng_encoder_settings_init(LodePNGEncoderSettings* settings) -+{ -+ lodepng_compress_settings_init(&settings->zlibsettings); -+ settings->filter_palette_zero = 1; -+ settings->filter_strategy = LFS_MINSUM; -+ settings->auto_convert = 1; -+ settings->force_palette = 0; -+ settings->predefined_filters = 0; -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ settings->add_id = 0; -+ settings->text_compression = 1; -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+} -+ -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+#endif /*LODEPNG_COMPILE_PNG*/ -+ -+#ifdef LODEPNG_COMPILE_ERROR_TEXT -+/* -+This returns the description of a numerical error code in English. This is also -+the documentation of all the error codes. -+*/ -+const char* lodepng_error_text(unsigned code) -+{ -+ switch(code) -+ { -+ case 0: return "no error, everything went ok"; -+ case 1: return "nothing done yet"; /*the Encoder/Decoder has done nothing yet, error checking makes no sense yet*/ -+ case 10: return "end of input memory reached without huffman end code"; /*while huffman decoding*/ -+ case 11: return "error in code tree made it jump outside of huffman tree"; /*while huffman decoding*/ -+ case 13: return "problem while processing dynamic deflate block"; -+ case 14: return "problem while processing dynamic deflate block"; -+ case 15: return "problem while processing dynamic deflate block"; -+ case 16: return "unexisting code while processing dynamic deflate block"; -+ case 17: return "end of out buffer memory reached while inflating"; -+ case 18: return "invalid distance code while inflating"; -+ case 19: return "end of out buffer memory reached while inflating"; -+ case 20: return "invalid deflate block BTYPE encountered while decoding"; -+ case 21: return "NLEN is not ones complement of LEN in a deflate block"; -+ /*end of out buffer memory reached while inflating: -+ This can happen if the inflated deflate data is longer than the amount of bytes required to fill up -+ all the pixels of the image, given the color depth and image dimensions. Something that doesn't -+ happen in a normal, well encoded, PNG image.*/ -+ case 22: return "end of out buffer memory reached while inflating"; -+ case 23: return "end of in buffer memory reached while inflating"; -+ case 24: return "invalid FCHECK in zlib header"; -+ case 25: return "invalid compression method in zlib header"; -+ case 26: return "FDICT encountered in zlib header while it's not used for PNG"; -+ case 27: return "PNG file is smaller than a PNG header"; -+ /*Checks the magic file header, the first 8 bytes of the PNG file*/ -+ case 28: return "incorrect PNG signature, it's no PNG or corrupted"; -+ case 29: return "first chunk is not the header chunk"; -+ case 30: return "chunk length too large, chunk broken off at end of file"; -+ case 31: return "illegal PNG color type or bpp"; -+ case 32: return "illegal PNG compression method"; -+ case 33: return "illegal PNG filter method"; -+ case 34: return "illegal PNG interlace method"; -+ case 35: return "chunk length of a chunk is too large or the chunk too small"; -+ case 36: return "illegal PNG filter type encountered"; -+ case 37: return "illegal bit depth for this color type given"; -+ case 38: return "the palette is too big"; /*more than 256 colors*/ -+ case 39: return "more palette alpha values given in tRNS chunk than there are colors in the palette"; -+ case 40: return "tRNS chunk has wrong size for greyscale image"; -+ case 41: return "tRNS chunk has wrong size for RGB image"; -+ case 42: return "tRNS chunk appeared while it was not allowed for this color type"; -+ case 43: return "bKGD chunk has wrong size for palette image"; -+ case 44: return "bKGD chunk has wrong size for greyscale image"; -+ case 45: return "bKGD chunk has wrong size for RGB image"; -+ case 48: return "empty input buffer given to decoder. Maybe caused by non-existing file?"; -+ case 49: return "jumped past memory while generating dynamic huffman tree"; -+ case 50: return "jumped past memory while generating dynamic huffman tree"; -+ case 51: return "jumped past memory while inflating huffman block"; -+ case 52: return "jumped past memory while inflating"; -+ case 53: return "size of zlib data too small"; -+ case 54: return "repeat symbol in tree while there was no value symbol yet"; -+ /*jumped past tree while generating huffman tree, this could be when the -+ tree will have more leaves than symbols after generating it out of the -+ given lenghts. They call this an oversubscribed dynamic bit lengths tree in zlib.*/ -+ case 55: return "jumped past tree while generating huffman tree"; -+ case 56: return "given output image colortype or bitdepth not supported for color conversion"; -+ case 57: return "invalid CRC encountered (checking CRC can be disabled)"; -+ case 58: return "invalid ADLER32 encountered (checking ADLER32 can be disabled)"; -+ case 59: return "requested color conversion not supported"; -+ case 60: return "invalid window size given in the settings of the encoder (must be 0-32768)"; -+ case 61: return "invalid BTYPE given in the settings of the encoder (only 0, 1 and 2 are allowed)"; -+ /*LodePNG leaves the choice of RGB to greyscale conversion formula to the user.*/ -+ case 62: return "conversion from color to greyscale not supported"; -+ case 63: return "length of a chunk too long, max allowed for PNG is 2147483647 bytes per chunk"; /*(2^31-1)*/ -+ /*this would result in the inability of a deflated block to ever contain an end code. It must be at least 1.*/ -+ case 64: return "the length of the END symbol 256 in the Huffman tree is 0"; -+ case 66: return "the length of a text chunk keyword given to the encoder is longer than the maximum of 79 bytes"; -+ case 67: return "the length of a text chunk keyword given to the encoder is smaller than the minimum of 1 byte"; -+ case 68: return "tried to encode a PLTE chunk with a palette that has less than 1 or more than 256 colors"; -+ case 69: return "unknown chunk type with 'critical' flag encountered by the decoder"; -+ case 71: return "unexisting interlace mode given to encoder (must be 0 or 1)"; -+ case 72: return "while decoding, unexisting compression method encountering in zTXt or iTXt chunk (it must be 0)"; -+ case 73: return "invalid tIME chunk size"; -+ case 74: return "invalid pHYs chunk size"; -+ /*length could be wrong, or data chopped off*/ -+ case 75: return "no null termination char found while decoding text chunk"; -+ case 76: return "iTXt chunk too short to contain required bytes"; -+ case 77: return "integer overflow in buffer size"; -+ case 78: return "failed to open file for reading"; /*file doesn't exist or couldn't be opened for reading*/ -+ case 79: return "failed to open file for writing"; -+ case 80: return "tried creating a tree of 0 symbols"; -+ case 81: return "lazy matching at pos 0 is impossible"; -+ case 82: return "color conversion to palette requested while a color isn't in palette"; -+ case 83: return "memory allocation failed"; -+ case 84: return "given image too small to contain all pixels to be encoded"; -+ case 86: return "impossible offset in lz77 encoding (internal bug)"; -+ case 87: return "must provide custom zlib function pointer if LODEPNG_COMPILE_ZLIB is not defined"; -+ case 88: return "invalid filter strategy given for LodePNGEncoderSettings.filter_strategy"; -+ case 89: return "text chunk keyword too short or long: must have size 1-79"; -+ /*the windowsize in the LodePNGCompressSettings. Requiring POT(==> & instead of %) makes encoding 12% faster.*/ -+ case 90: return "windowsize must be a power of two"; -+ case 91: return "invalid decompressed idat size"; -+ case 92: return "too many pixels, not supported"; -+ case 93: return "zero width or height is invalid"; -+ case 94: return "header chunk must have a size of 13 bytes"; -+ } -+ return "unknown error code"; -+} -+#endif /*LODEPNG_COMPILE_ERROR_TEXT*/ -+ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* // C++ Wrapper // */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+/* ////////////////////////////////////////////////////////////////////////// */ -+ -+#ifdef LODEPNG_COMPILE_CPP -+namespace lodepng -+{ -+ -+#ifdef LODEPNG_COMPILE_DISK -+unsigned load_file(std::vector<unsigned char>& buffer, const std::string& filename) -+{ -+ long size = lodepng_filesize(filename.c_str()); -+ if(size < 0) return 78; -+ buffer.resize((size_t)size); -+ return size == 0 ? 0 : lodepng_buffer_file(&buffer[0], (size_t)size, filename.c_str()); -+} -+ -+/*write given buffer to the file, overwriting the file, it doesn't append to it.*/ -+unsigned save_file(const std::vector<unsigned char>& buffer, const std::string& filename) -+{ -+ return lodepng_save_file(buffer.empty() ? 0 : &buffer[0], buffer.size(), filename.c_str()); -+} -+#endif /* LODEPNG_COMPILE_DISK */ -+ -+#ifdef LODEPNG_COMPILE_ZLIB -+#ifdef LODEPNG_COMPILE_DECODER -+unsigned decompress(std::vector<unsigned char>& out, const unsigned char* in, size_t insize, -+ const LodePNGDecompressSettings& settings) -+{ -+ unsigned char* buffer = 0; -+ size_t buffersize = 0; -+ unsigned error = zlib_decompress(&buffer, &buffersize, in, insize, &settings); -+ if(buffer) -+ { -+ out.insert(out.end(), &buffer[0], &buffer[buffersize]); -+ lodepng_free(buffer); -+ } -+ return error; -+} -+ -+unsigned decompress(std::vector<unsigned char>& out, const std::vector<unsigned char>& in, -+ const LodePNGDecompressSettings& settings) -+{ -+ return decompress(out, in.empty() ? 0 : &in[0], in.size(), settings); -+} -+#endif /* LODEPNG_COMPILE_DECODER */ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+unsigned compress(std::vector<unsigned char>& out, const unsigned char* in, size_t insize, -+ const LodePNGCompressSettings& settings) -+{ -+ unsigned char* buffer = 0; -+ size_t buffersize = 0; -+ unsigned error = zlib_compress(&buffer, &buffersize, in, insize, &settings); -+ if(buffer) -+ { -+ out.insert(out.end(), &buffer[0], &buffer[buffersize]); -+ lodepng_free(buffer); -+ } -+ return error; -+} -+ -+unsigned compress(std::vector<unsigned char>& out, const std::vector<unsigned char>& in, -+ const LodePNGCompressSettings& settings) -+{ -+ return compress(out, in.empty() ? 0 : &in[0], in.size(), settings); -+} -+#endif /* LODEPNG_COMPILE_ENCODER */ -+#endif /* LODEPNG_COMPILE_ZLIB */ -+ -+ -+#ifdef LODEPNG_COMPILE_PNG -+ -+State::State() -+{ -+ lodepng_state_init(this); -+} -+ -+State::State(const State& other) -+{ -+ lodepng_state_init(this); -+ lodepng_state_copy(this, &other); -+} -+ -+State::~State() -+{ -+ lodepng_state_cleanup(this); -+} -+ -+State& State::operator=(const State& other) -+{ -+ lodepng_state_copy(this, &other); -+ return *this; -+} -+ -+#ifdef LODEPNG_COMPILE_DECODER -+ -+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, const unsigned char* in, -+ size_t insize, LodePNGColorType colortype, unsigned bitdepth) -+{ -+ unsigned char* buffer; -+ unsigned error = lodepng_decode_memory(&buffer, &w, &h, in, insize, colortype, bitdepth); -+ if(buffer && !error) -+ { -+ State state; -+ state.info_raw.colortype = colortype; -+ state.info_raw.bitdepth = bitdepth; -+ size_t buffersize = lodepng_get_raw_size(w, h, &state.info_raw); -+ out.insert(out.end(), &buffer[0], &buffer[buffersize]); -+ lodepng_free(buffer); -+ } -+ return error; -+} -+ -+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, -+ const std::vector<unsigned char>& in, LodePNGColorType colortype, unsigned bitdepth) -+{ -+ return decode(out, w, h, in.empty() ? 0 : &in[0], (unsigned)in.size(), colortype, bitdepth); -+} -+ -+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, -+ State& state, -+ const unsigned char* in, size_t insize) -+{ -+ unsigned char* buffer = NULL; -+ unsigned error = lodepng_decode(&buffer, &w, &h, &state, in, insize); -+ if(buffer && !error) -+ { -+ size_t buffersize = lodepng_get_raw_size(w, h, &state.info_raw); -+ out.insert(out.end(), &buffer[0], &buffer[buffersize]); -+ } -+ lodepng_free(buffer); -+ return error; -+} -+ -+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, -+ State& state, -+ const std::vector<unsigned char>& in) -+{ -+ return decode(out, w, h, state, in.empty() ? 0 : &in[0], in.size()); -+} -+ -+#ifdef LODEPNG_COMPILE_DISK -+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, const std::string& filename, -+ LodePNGColorType colortype, unsigned bitdepth) -+{ -+ std::vector<unsigned char> buffer; -+ unsigned error = load_file(buffer, filename); -+ if(error) return error; -+ return decode(out, w, h, buffer, colortype, bitdepth); -+} -+#endif /* LODEPNG_COMPILE_DECODER */ -+#endif /* LODEPNG_COMPILE_DISK */ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+unsigned encode(std::vector<unsigned char>& out, const unsigned char* in, unsigned w, unsigned h, -+ LodePNGColorType colortype, unsigned bitdepth) -+{ -+ unsigned char* buffer; -+ size_t buffersize; -+ unsigned error = lodepng_encode_memory(&buffer, &buffersize, in, w, h, colortype, bitdepth); -+ if(buffer) -+ { -+ out.insert(out.end(), &buffer[0], &buffer[buffersize]); -+ lodepng_free(buffer); -+ } -+ return error; -+} -+ -+unsigned encode(std::vector<unsigned char>& out, -+ const std::vector<unsigned char>& in, unsigned w, unsigned h, -+ LodePNGColorType colortype, unsigned bitdepth) -+{ -+ if(lodepng_get_raw_size_lct(w, h, colortype, bitdepth) > in.size()) return 84; -+ return encode(out, in.empty() ? 0 : &in[0], w, h, colortype, bitdepth); -+} -+ -+unsigned encode(std::vector<unsigned char>& out, -+ const unsigned char* in, unsigned w, unsigned h, -+ State& state) -+{ -+ unsigned char* buffer; -+ size_t buffersize; -+ unsigned error = lodepng_encode(&buffer, &buffersize, in, w, h, &state); -+ if(buffer) -+ { -+ out.insert(out.end(), &buffer[0], &buffer[buffersize]); -+ lodepng_free(buffer); -+ } -+ return error; -+} -+ -+unsigned encode(std::vector<unsigned char>& out, -+ const std::vector<unsigned char>& in, unsigned w, unsigned h, -+ State& state) -+{ -+ if(lodepng_get_raw_size(w, h, &state.info_raw) > in.size()) return 84; -+ return encode(out, in.empty() ? 0 : &in[0], w, h, state); -+} -+ -+#ifdef LODEPNG_COMPILE_DISK -+unsigned encode(const std::string& filename, -+ const unsigned char* in, unsigned w, unsigned h, -+ LodePNGColorType colortype, unsigned bitdepth) -+{ -+ std::vector<unsigned char> buffer; -+ unsigned error = encode(buffer, in, w, h, colortype, bitdepth); -+ if(!error) error = save_file(buffer, filename); -+ return error; -+} -+ -+unsigned encode(const std::string& filename, -+ const std::vector<unsigned char>& in, unsigned w, unsigned h, -+ LodePNGColorType colortype, unsigned bitdepth) -+{ -+ if(lodepng_get_raw_size_lct(w, h, colortype, bitdepth) > in.size()) return 84; -+ return encode(filename, in.empty() ? 0 : &in[0], w, h, colortype, bitdepth); -+} -+#endif /* LODEPNG_COMPILE_DISK */ -+#endif /* LODEPNG_COMPILE_ENCODER */ -+#endif /* LODEPNG_COMPILE_PNG */ -+} /* namespace lodepng */ -+#endif /*LODEPNG_COMPILE_CPP*/ diff --git a/graphics/openfx-arena/files/patch-Bundle_lodepng.h b/graphics/openfx-arena/files/patch-Bundle_lodepng.h deleted file mode 100644 index 4bbad58f74d2..000000000000 --- a/graphics/openfx-arena/files/patch-Bundle_lodepng.h +++ /dev/null @@ -1,1762 +0,0 @@ ---- Bundle/lodepng.h.orig 2017-10-04 17:18:33 UTC -+++ Bundle/lodepng.h -@@ -0,0 +1,1759 @@ -+/* -+LodePNG version 20160418 -+ -+Copyright (c) 2005-2016 Lode Vandevenne -+ -+This software is provided 'as-is', without any express or implied -+warranty. In no event will the authors be held liable for any damages -+arising from the use of this software. -+ -+Permission is granted to anyone to use this software for any purpose, -+including commercial applications, and to alter it and redistribute it -+freely, subject to the following restrictions: -+ -+ 1. The origin of this software must not be misrepresented; you must not -+ claim that you wrote the original software. If you use this software -+ in a product, an acknowledgment in the product documentation would be -+ appreciated but is not required. -+ -+ 2. Altered source versions must be plainly marked as such, and must not be -+ misrepresented as being the original software. -+ -+ 3. This notice may not be removed or altered from any source -+ distribution. -+*/ -+ -+#ifndef LODEPNG_H -+#define LODEPNG_H -+ -+#include <string.h> /*for size_t*/ -+ -+extern const char* LODEPNG_VERSION_STRING; -+ -+/* -+The following #defines are used to create code sections. They can be disabled -+to disable code sections, which can give faster compile time and smaller binary. -+The "NO_COMPILE" defines are designed to be used to pass as defines to the -+compiler command to disable them without modifying this header, e.g. -+-DLODEPNG_NO_COMPILE_ZLIB for gcc. -+In addition to those below, you can also define LODEPNG_NO_COMPILE_CRC to -+allow implementing a custom lodepng_crc32. -+*/ -+/*deflate & zlib. If disabled, you must specify alternative zlib functions in -+the custom_zlib field of the compress and decompress settings*/ -+#ifndef LODEPNG_NO_COMPILE_ZLIB -+#define LODEPNG_COMPILE_ZLIB -+#endif -+/*png encoder and png decoder*/ -+#ifndef LODEPNG_NO_COMPILE_PNG -+#define LODEPNG_COMPILE_PNG -+#endif -+/*deflate&zlib decoder and png decoder*/ -+#ifndef LODEPNG_NO_COMPILE_DECODER -+#define LODEPNG_COMPILE_DECODER -+#endif -+/*deflate&zlib encoder and png encoder*/ -+#ifndef LODEPNG_NO_COMPILE_ENCODER -+#define LODEPNG_COMPILE_ENCODER -+#endif -+/*the optional built in harddisk file loading and saving functions*/ -+#ifndef LODEPNG_NO_COMPILE_DISK -+#define LODEPNG_COMPILE_DISK -+#endif -+/*support for chunks other than IHDR, IDAT, PLTE, tRNS, IEND: ancillary and unknown chunks*/ -+#ifndef LODEPNG_NO_COMPILE_ANCILLARY_CHUNKS -+#define LODEPNG_COMPILE_ANCILLARY_CHUNKS -+#endif -+/*ability to convert error numerical codes to English text string*/ -+#ifndef LODEPNG_NO_COMPILE_ERROR_TEXT -+#define LODEPNG_COMPILE_ERROR_TEXT -+#endif -+/*Compile the default allocators (C's free, malloc and realloc). If you disable this, -+you can define the functions lodepng_free, lodepng_malloc and lodepng_realloc in your -+source files with custom allocators.*/ -+#ifndef LODEPNG_NO_COMPILE_ALLOCATORS -+#define LODEPNG_COMPILE_ALLOCATORS -+#endif -+/*compile the C++ version (you can disable the C++ wrapper here even when compiling for C++)*/ -+#ifdef __cplusplus -+#ifndef LODEPNG_NO_COMPILE_CPP -+#define LODEPNG_COMPILE_CPP -+#endif -+#endif -+ -+#ifdef LODEPNG_COMPILE_CPP -+#include <vector> -+#include <string> -+#endif /*LODEPNG_COMPILE_CPP*/ -+ -+#ifdef LODEPNG_COMPILE_PNG -+/*The PNG color types (also used for raw).*/ -+typedef enum LodePNGColorType -+{ -+ LCT_GREY = 0, /*greyscale: 1,2,4,8,16 bit*/ -+ LCT_RGB = 2, /*RGB: 8,16 bit*/ -+ LCT_PALETTE = 3, /*palette: 1,2,4,8 bit*/ -+ LCT_GREY_ALPHA = 4, /*greyscale with alpha: 8,16 bit*/ -+ LCT_RGBA = 6 /*RGB with alpha: 8,16 bit*/ -+} LodePNGColorType; -+ -+#ifdef LODEPNG_COMPILE_DECODER -+/* -+Converts PNG data in memory to raw pixel data. -+out: Output parameter. Pointer to buffer that will contain the raw pixel data. -+ After decoding, its size is w * h * (bytes per pixel) bytes larger than -+ initially. Bytes per pixel depends on colortype and bitdepth. -+ Must be freed after usage with free(*out). -+ Note: for 16-bit per channel colors, uses big endian format like PNG does. -+w: Output parameter. Pointer to width of pixel data. -+h: Output parameter. Pointer to height of pixel data. -+in: Memory buffer with the PNG file. -+insize: size of the in buffer. -+colortype: the desired color type for the raw output image. See explanation on PNG color types. -+bitdepth: the desired bit depth for the raw output image. See explanation on PNG color types. -+Return value: LodePNG error code (0 means no error). -+*/ -+unsigned lodepng_decode_memory(unsigned char** out, unsigned* w, unsigned* h, -+ const unsigned char* in, size_t insize, -+ LodePNGColorType colortype, unsigned bitdepth); -+ -+/*Same as lodepng_decode_memory, but always decodes to 32-bit RGBA raw image*/ -+unsigned lodepng_decode32(unsigned char** out, unsigned* w, unsigned* h, -+ const unsigned char* in, size_t insize); -+ -+/*Same as lodepng_decode_memory, but always decodes to 24-bit RGB raw image*/ -+unsigned lodepng_decode24(unsigned char** out, unsigned* w, unsigned* h, -+ const unsigned char* in, size_t insize); -+ -+#ifdef LODEPNG_COMPILE_DISK -+/* -+Load PNG from disk, from file with given name. -+Same as the other decode functions, but instead takes a filename as input. -+*/ -+unsigned lodepng_decode_file(unsigned char** out, unsigned* w, unsigned* h, -+ const char* filename, -+ LodePNGColorType colortype, unsigned bitdepth); -+ -+/*Same as lodepng_decode_file, but always decodes to 32-bit RGBA raw image.*/ -+unsigned lodepng_decode32_file(unsigned char** out, unsigned* w, unsigned* h, -+ const char* filename); -+ -+/*Same as lodepng_decode_file, but always decodes to 24-bit RGB raw image.*/ -+unsigned lodepng_decode24_file(unsigned char** out, unsigned* w, unsigned* h, -+ const char* filename); -+#endif /*LODEPNG_COMPILE_DISK*/ -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+/* -+Converts raw pixel data into a PNG image in memory. The colortype and bitdepth -+ of the output PNG image cannot be chosen, they are automatically determined -+ by the colortype, bitdepth and content of the input pixel data. -+ Note: for 16-bit per channel colors, needs big endian format like PNG does. -+out: Output parameter. Pointer to buffer that will contain the PNG image data. -+ Must be freed after usage with free(*out). -+outsize: Output parameter. Pointer to the size in bytes of the out buffer. -+image: The raw pixel data to encode. The size of this buffer should be -+ w * h * (bytes per pixel), bytes per pixel depends on colortype and bitdepth. -+w: width of the raw pixel data in pixels. -+h: height of the raw pixel data in pixels. -+colortype: the color type of the raw input image. See explanation on PNG color types. -+bitdepth: the bit depth of the raw input image. See explanation on PNG color types. -+Return value: LodePNG error code (0 means no error). -+*/ -+unsigned lodepng_encode_memory(unsigned char** out, size_t* outsize, -+ const unsigned char* image, unsigned w, unsigned h, -+ LodePNGColorType colortype, unsigned bitdepth); -+ -+/*Same as lodepng_encode_memory, but always encodes from 32-bit RGBA raw image.*/ -+unsigned lodepng_encode32(unsigned char** out, size_t* outsize, -+ const unsigned char* image, unsigned w, unsigned h); -+ -+/*Same as lodepng_encode_memory, but always encodes from 24-bit RGB raw image.*/ -+unsigned lodepng_encode24(unsigned char** out, size_t* outsize, -+ const unsigned char* image, unsigned w, unsigned h); -+ -+#ifdef LODEPNG_COMPILE_DISK -+/* -+Converts raw pixel data into a PNG file on disk. -+Same as the other encode functions, but instead takes a filename as output. -+NOTE: This overwrites existing files without warning! -+*/ -+unsigned lodepng_encode_file(const char* filename, -+ const unsigned char* image, unsigned w, unsigned h, -+ LodePNGColorType colortype, unsigned bitdepth); -+ -+/*Same as lodepng_encode_file, but always encodes from 32-bit RGBA raw image.*/ -+unsigned lodepng_encode32_file(const char* filename, -+ const unsigned char* image, unsigned w, unsigned h); -+ -+/*Same as lodepng_encode_file, but always encodes from 24-bit RGB raw image.*/ -+unsigned lodepng_encode24_file(const char* filename, -+ const unsigned char* image, unsigned w, unsigned h); -+#endif /*LODEPNG_COMPILE_DISK*/ -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ -+ -+#ifdef LODEPNG_COMPILE_CPP -+namespace lodepng -+{ -+#ifdef LODEPNG_COMPILE_DECODER -+/*Same as lodepng_decode_memory, but decodes to an std::vector. The colortype -+is the format to output the pixels to. Default is RGBA 8-bit per channel.*/ -+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, -+ const unsigned char* in, size_t insize, -+ LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); -+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, -+ const std::vector<unsigned char>& in, -+ LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); -+#ifdef LODEPNG_COMPILE_DISK -+/* -+Converts PNG file from disk to raw pixel data in memory. -+Same as the other decode functions, but instead takes a filename as input. -+*/ -+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, -+ const std::string& filename, -+ LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); -+#endif /* LODEPNG_COMPILE_DISK */ -+#endif /* LODEPNG_COMPILE_DECODER */ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+/*Same as lodepng_encode_memory, but encodes to an std::vector. colortype -+is that of the raw input data. The output PNG color type will be auto chosen.*/ -+unsigned encode(std::vector<unsigned char>& out, -+ const unsigned char* in, unsigned w, unsigned h, -+ LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); -+unsigned encode(std::vector<unsigned char>& out, -+ const std::vector<unsigned char>& in, unsigned w, unsigned h, -+ LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); -+#ifdef LODEPNG_COMPILE_DISK -+/* -+Converts 32-bit RGBA raw pixel data into a PNG file on disk. -+Same as the other encode functions, but instead takes a filename as output. -+NOTE: This overwrites existing files without warning! -+*/ -+unsigned encode(const std::string& filename, -+ const unsigned char* in, unsigned w, unsigned h, -+ LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); -+unsigned encode(const std::string& filename, -+ const std::vector<unsigned char>& in, unsigned w, unsigned h, -+ LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); -+#endif /* LODEPNG_COMPILE_DISK */ -+#endif /* LODEPNG_COMPILE_ENCODER */ -+} /* namespace lodepng */ -+#endif /*LODEPNG_COMPILE_CPP*/ -+#endif /*LODEPNG_COMPILE_PNG*/ -+ -+#ifdef LODEPNG_COMPILE_ERROR_TEXT -+/*Returns an English description of the numerical error code.*/ -+const char* lodepng_error_text(unsigned code); -+#endif /*LODEPNG_COMPILE_ERROR_TEXT*/ -+ -+#ifdef LODEPNG_COMPILE_DECODER -+/*Settings for zlib decompression*/ -+typedef struct LodePNGDecompressSettings LodePNGDecompressSettings; -+struct LodePNGDecompressSettings -+{ -+ unsigned ignore_adler32; /*if 1, continue and don't give an error message if the Adler32 checksum is corrupted*/ -+ -+ /*use custom zlib decoder instead of built in one (default: null)*/ -+ unsigned (*custom_zlib)(unsigned char**, size_t*, -+ const unsigned char*, size_t, -+ const LodePNGDecompressSettings*); -+ /*use custom deflate decoder instead of built in one (default: null) -+ if custom_zlib is used, custom_deflate is ignored since only the built in -+ zlib function will call custom_deflate*/ -+ unsigned (*custom_inflate)(unsigned char**, size_t*, -+ const unsigned char*, size_t, -+ const LodePNGDecompressSettings*); -+ -+ const void* custom_context; /*optional custom settings for custom functions*/ -+}; -+ -+extern const LodePNGDecompressSettings lodepng_default_decompress_settings; -+void lodepng_decompress_settings_init(LodePNGDecompressSettings* settings); -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+/* -+Settings for zlib compression. Tweaking these settings tweaks the balance -+between speed and compression ratio. -+*/ -+typedef struct LodePNGCompressSettings LodePNGCompressSettings; -+struct LodePNGCompressSettings /*deflate = compress*/ -+{ -+ /*LZ77 related settings*/ -+ unsigned btype; /*the block type for LZ (0, 1, 2 or 3, see zlib standard). Should be 2 for proper compression.*/ -+ unsigned use_lz77; /*whether or not to use LZ77. Should be 1 for proper compression.*/ -+ unsigned windowsize; /*must be a power of two <= 32768. higher compresses more but is slower. Default value: 2048.*/ -+ unsigned minmatch; /*mininum lz77 length. 3 is normally best, 6 can be better for some PNGs. Default: 0*/ -+ unsigned nicematch; /*stop searching if >= this length found. Set to 258 for best compression. Default: 128*/ -+ unsigned lazymatching; /*use lazy matching: better compression but a bit slower. Default: true*/ -+ -+ /*use custom zlib encoder instead of built in one (default: null)*/ -+ unsigned (*custom_zlib)(unsigned char**, size_t*, -+ const unsigned char*, size_t, -+ const LodePNGCompressSettings*); -+ /*use custom deflate encoder instead of built in one (default: null) -+ if custom_zlib is used, custom_deflate is ignored since only the built in -+ zlib function will call custom_deflate*/ -+ unsigned (*custom_deflate)(unsigned char**, size_t*, -+ const unsigned char*, size_t, -+ const LodePNGCompressSettings*); -+ -+ const void* custom_context; /*optional custom settings for custom functions*/ -+}; -+ -+extern const LodePNGCompressSettings lodepng_default_compress_settings; -+void lodepng_compress_settings_init(LodePNGCompressSettings* settings); -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ -+#ifdef LODEPNG_COMPILE_PNG -+/* -+Color mode of an image. Contains all information required to decode the pixel -+bits to RGBA colors. This information is the same as used in the PNG file -+format, and is used both for PNG and raw image data in LodePNG. -+*/ -+typedef struct LodePNGColorMode -+{ -+ /*header (IHDR)*/ -+ LodePNGColorType colortype; /*color type, see PNG standard or documentation further in this header file*/ -+ unsigned bitdepth; /*bits per sample, see PNG standard or documentation further in this header file*/ -+ -+ /* -+ palette (PLTE and tRNS) -+ -+ Dynamically allocated with the colors of the palette, including alpha. -+ When encoding a PNG, to store your colors in the palette of the LodePNGColorMode, first use -+ lodepng_palette_clear, then for each color use lodepng_palette_add. -+ If you encode an image without alpha with palette, don't forget to put value 255 in each A byte of the palette. -+ -+ When decoding, by default you can ignore this palette, since LodePNG already -+ fills the palette colors in the pixels of the raw RGBA output. -+ -+ The palette is only supported for color type 3. -+ */ -+ unsigned char* palette; /*palette in RGBARGBA... order. When allocated, must be either 0, or have size 1024*/ -+ size_t palettesize; /*palette size in number of colors (amount of bytes is 4 * palettesize)*/ -+ -+ /* -+ transparent color key (tRNS) -+ -+ This color uses the same bit depth as the bitdepth value in this struct, which can be 1-bit to 16-bit. -+ For greyscale PNGs, r, g and b will all 3 be set to the same. -+ -+ When decoding, by default you can ignore this information, since LodePNG sets -+ pixels with this key to transparent already in the raw RGBA output. -+ -+ The color key is only supported for color types 0 and 2. -+ */ -+ unsigned key_defined; /*is a transparent color key given? 0 = false, 1 = true*/ -+ unsigned key_r; /*red/greyscale component of color key*/ -+ unsigned key_g; /*green component of color key*/ -+ unsigned key_b; /*blue component of color key*/ -+} LodePNGColorMode; -+ -+/*init, cleanup and copy functions to use with this struct*/ -+void lodepng_color_mode_init(LodePNGColorMode* info); -+void lodepng_color_mode_cleanup(LodePNGColorMode* info); -+/*return value is error code (0 means no error)*/ -+unsigned lodepng_color_mode_copy(LodePNGColorMode* dest, const LodePNGColorMode* source); -+ -+void lodepng_palette_clear(LodePNGColorMode* info); -+/*add 1 color to the palette*/ -+unsigned lodepng_palette_add(LodePNGColorMode* info, -+ unsigned char r, unsigned char g, unsigned char b, unsigned char a); -+ -+/*get the total amount of bits per pixel, based on colortype and bitdepth in the struct*/ -+unsigned lodepng_get_bpp(const LodePNGColorMode* info); -+/*get the amount of color channels used, based on colortype in the struct. -+If a palette is used, it counts as 1 channel.*/ -+unsigned lodepng_get_channels(const LodePNGColorMode* info); -+/*is it a greyscale type? (only colortype 0 or 4)*/ -+unsigned lodepng_is_greyscale_type(const LodePNGColorMode* info); -+/*has it got an alpha channel? (only colortype 2 or 6)*/ -+unsigned lodepng_is_alpha_type(const LodePNGColorMode* info); -+/*has it got a palette? (only colortype 3)*/ -+unsigned lodepng_is_palette_type(const LodePNGColorMode* info); -+/*only returns true if there is a palette and there is a value in the palette with alpha < 255. -+Loops through the palette to check this.*/ -+unsigned lodepng_has_palette_alpha(const LodePNGColorMode* info); -+/* -+Check if the given color info indicates the possibility of having non-opaque pixels in the PNG image. -+Returns true if the image can have translucent or invisible pixels (it still be opaque if it doesn't use such pixels). -+Returns false if the image can only have opaque pixels. -+In detail, it returns true only if it's a color type with alpha, or has a palette with non-opaque values, -+or if "key_defined" is true. -+*/ -+unsigned lodepng_can_have_alpha(const LodePNGColorMode* info); -+/*Returns the byte size of a raw image buffer with given width, height and color mode*/ -+size_t lodepng_get_raw_size(unsigned w, unsigned h, const LodePNGColorMode* color); -+ -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+/*The information of a Time chunk in PNG.*/ -+typedef struct LodePNGTime -+{ -+ unsigned year; /*2 bytes used (0-65535)*/ -+ unsigned month; /*1-12*/ -+ unsigned day; /*1-31*/ -+ unsigned hour; /*0-23*/ -+ unsigned minute; /*0-59*/ -+ unsigned second; /*0-60 (to allow for leap seconds)*/ -+} LodePNGTime; -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ -+/*Information about the PNG image, except pixels, width and height.*/ -+typedef struct LodePNGInfo -+{ -+ /*header (IHDR), palette (PLTE) and transparency (tRNS) chunks*/ -+ unsigned compression_method;/*compression method of the original file. Always 0.*/ -+ unsigned filter_method; /*filter method of the original file*/ -+ unsigned interlace_method; /*interlace method of the original file*/ -+ LodePNGColorMode color; /*color type and bits, palette and transparency of the PNG file*/ -+ -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ /* -+ suggested background color chunk (bKGD) -+ This color uses the same color mode as the PNG (except alpha channel), which can be 1-bit to 16-bit. -+ -+ For greyscale PNGs, r, g and b will all 3 be set to the same. When encoding -+ the encoder writes the red one. For palette PNGs: When decoding, the RGB value -+ will be stored, not a palette index. But when encoding, specify the index of -+ the palette in background_r, the other two are then ignored. -+ -+ The decoder does not use this background color to edit the color of pixels. -+ */ -+ unsigned background_defined; /*is a suggested background color given?*/ -+ unsigned background_r; /*red component of suggested background color*/ -+ unsigned background_g; /*green component of suggested background color*/ -+ unsigned background_b; /*blue component of suggested background color*/ -+ -+ /* -+ non-international text chunks (tEXt and zTXt) -+ -+ The char** arrays each contain num strings. The actual messages are in -+ text_strings, while text_keys are keywords that give a short description what -+ the actual text represents, e.g. Title, Author, Description, or anything else. -+ -+ A keyword is minimum 1 character and maximum 79 characters long. It's -+ discouraged to use a single line length longer than 79 characters for texts. -+ -+ Don't allocate these text buffers yourself. Use the init/cleanup functions -+ correctly and use lodepng_add_text and lodepng_clear_text. -+ */ -+ size_t text_num; /*the amount of texts in these char** buffers (there may be more texts in itext)*/ -+ char** text_keys; /*the keyword of a text chunk (e.g. "Comment")*/ -+ char** text_strings; /*the actual text*/ -+ -+ /* -+ international text chunks (iTXt) -+ Similar to the non-international text chunks, but with additional strings -+ "langtags" and "transkeys". -+ */ -+ size_t itext_num; /*the amount of international texts in this PNG*/ -+ char** itext_keys; /*the English keyword of the text chunk (e.g. "Comment")*/ -+ char** itext_langtags; /*language tag for this text's language, ISO/IEC 646 string, e.g. ISO 639 language tag*/ -+ char** itext_transkeys; /*keyword translated to the international language - UTF-8 string*/ -+ char** itext_strings; /*the actual international text - UTF-8 string*/ -+ -+ /*time chunk (tIME)*/ -+ unsigned time_defined; /*set to 1 to make the encoder generate a tIME chunk*/ -+ LodePNGTime time; -+ -+ /*phys chunk (pHYs)*/ -+ unsigned phys_defined; /*if 0, there is no pHYs chunk and the values below are undefined, if 1 else there is one*/ -+ unsigned phys_x; /*pixels per unit in x direction*/ -+ unsigned phys_y; /*pixels per unit in y direction*/ -+ unsigned phys_unit; /*may be 0 (unknown unit) or 1 (metre)*/ -+ -+ /* -+ unknown chunks -+ There are 3 buffers, one for each position in the PNG where unknown chunks can appear -+ each buffer contains all unknown chunks for that position consecutively -+ The 3 buffers are the unknown chunks between certain critical chunks: -+ 0: IHDR-PLTE, 1: PLTE-IDAT, 2: IDAT-IEND -+ Do not allocate or traverse this data yourself. Use the chunk traversing functions declared -+ later, such as lodepng_chunk_next and lodepng_chunk_append, to read/write this struct. -+ */ -+ unsigned char* unknown_chunks_data[3]; -+ size_t unknown_chunks_size[3]; /*size in bytes of the unknown chunks, given for protection*/ -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+} LodePNGInfo; -+ -+/*init, cleanup and copy functions to use with this struct*/ -+void lodepng_info_init(LodePNGInfo* info); -+void lodepng_info_cleanup(LodePNGInfo* info); -+/*return value is error code (0 means no error)*/ -+unsigned lodepng_info_copy(LodePNGInfo* dest, const LodePNGInfo* source); -+ -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+void lodepng_clear_text(LodePNGInfo* info); /*use this to clear the texts again after you filled them in*/ -+unsigned lodepng_add_text(LodePNGInfo* info, const char* key, const char* str); /*push back both texts at once*/ -+ -+void lodepng_clear_itext(LodePNGInfo* info); /*use this to clear the itexts again after you filled them in*/ -+unsigned lodepng_add_itext(LodePNGInfo* info, const char* key, const char* langtag, -+ const char* transkey, const char* str); /*push back the 4 texts of 1 chunk at once*/ -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+ -+/* -+Converts raw buffer from one color type to another color type, based on -+LodePNGColorMode structs to describe the input and output color type. -+See the reference manual at the end of this header file to see which color conversions are supported. -+return value = LodePNG error code (0 if all went ok, an error if the conversion isn't supported) -+The out buffer must have size (w * h * bpp + 7) / 8, where bpp is the bits per pixel -+of the output color type (lodepng_get_bpp). -+For < 8 bpp images, there should not be padding bits at the end of scanlines. -+For 16-bit per channel colors, uses big endian format like PNG does. -+Return value is LodePNG error code -+*/ -+unsigned lodepng_convert(unsigned char* out, const unsigned char* in, -+ const LodePNGColorMode* mode_out, const LodePNGColorMode* mode_in, -+ unsigned w, unsigned h); -+ -+#ifdef LODEPNG_COMPILE_DECODER -+/* -+Settings for the decoder. This contains settings for the PNG and the Zlib -+decoder, but not the Info settings from the Info structs. -+*/ -+typedef struct LodePNGDecoderSettings -+{ -+ LodePNGDecompressSettings zlibsettings; /*in here is the setting to ignore Adler32 checksums*/ -+ -+ unsigned ignore_crc; /*ignore CRC checksums*/ -+ -+ unsigned color_convert; /*whether to convert the PNG to the color type you want. Default: yes*/ -+ -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ unsigned read_text_chunks; /*if false but remember_unknown_chunks is true, they're stored in the unknown chunks*/ -+ /*store all bytes from unknown chunks in the LodePNGInfo (off by default, useful for a png editor)*/ -+ unsigned remember_unknown_chunks; -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+} LodePNGDecoderSettings; -+ -+void lodepng_decoder_settings_init(LodePNGDecoderSettings* settings); -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+/*automatically use color type with less bits per pixel if losslessly possible. Default: AUTO*/ -+typedef enum LodePNGFilterStrategy -+{ -+ /*every filter at zero*/ -+ LFS_ZERO, -+ /*Use filter that gives minimum sum, as described in the official PNG filter heuristic.*/ -+ LFS_MINSUM, -+ /*Use the filter type that gives smallest Shannon entropy for this scanline. Depending -+ on the image, this is better or worse than minsum.*/ -+ LFS_ENTROPY, -+ /* -+ Brute-force-search PNG filters by compressing each filter for each scanline. -+ Experimental, very slow, and only rarely gives better compression than MINSUM. -+ */ -+ LFS_BRUTE_FORCE, -+ /*use predefined_filters buffer: you specify the filter type for each scanline*/ -+ LFS_PREDEFINED -+} LodePNGFilterStrategy; -+ -+/*Gives characteristics about the colors of the image, which helps decide which color model to use for encoding. -+Used internally by default if "auto_convert" is enabled. Public because it's useful for custom algorithms.*/ -+typedef struct LodePNGColorProfile -+{ -+ unsigned colored; /*not greyscale*/ -+ unsigned key; /*if true, image is not opaque. Only if true and alpha is false, color key is possible.*/ -+ unsigned short key_r; /*these values are always in 16-bit bitdepth in the profile*/ -+ unsigned short key_g; -+ unsigned short key_b; -+ unsigned alpha; /*alpha channel or alpha palette required*/ -+ unsigned numcolors; /*amount of colors, up to 257. Not valid if bits == 16.*/ -+ unsigned char palette[1024]; /*Remembers up to the first 256 RGBA colors, in no particular order*/ -+ unsigned bits; /*bits per channel (not for palette). 1,2 or 4 for greyscale only. 16 if 16-bit per channel required.*/ -+} LodePNGColorProfile; -+ -+void lodepng_color_profile_init(LodePNGColorProfile* profile); -+ -+/*Get a LodePNGColorProfile of the image.*/ -+unsigned lodepng_get_color_profile(LodePNGColorProfile* profile, -+ const unsigned char* image, unsigned w, unsigned h, -+ const LodePNGColorMode* mode_in); -+/*The function LodePNG uses internally to decide the PNG color with auto_convert. -+Chooses an optimal color model, e.g. grey if only grey pixels, palette if < 256 colors, ...*/ -+unsigned lodepng_auto_choose_color(LodePNGColorMode* mode_out, -+ const unsigned char* image, unsigned w, unsigned h, -+ const LodePNGColorMode* mode_in); -+ -+/*Settings for the encoder.*/ -+typedef struct LodePNGEncoderSettings -+{ -+ LodePNGCompressSettings zlibsettings; /*settings for the zlib encoder, such as window size, ...*/ -+ -+ unsigned auto_convert; /*automatically choose output PNG color type. Default: true*/ -+ -+ /*If true, follows the official PNG heuristic: if the PNG uses a palette or lower than -+ 8 bit depth, set all filters to zero. Otherwise use the filter_strategy. Note that to -+ completely follow the official PNG heuristic, filter_palette_zero must be true and -+ filter_strategy must be LFS_MINSUM*/ -+ unsigned filter_palette_zero; -+ /*Which filter strategy to use when not using zeroes due to filter_palette_zero. -+ Set filter_palette_zero to 0 to ensure always using your chosen strategy. Default: LFS_MINSUM*/ -+ LodePNGFilterStrategy filter_strategy; -+ /*used if filter_strategy is LFS_PREDEFINED. In that case, this must point to a buffer with -+ the same length as the amount of scanlines in the image, and each value must <= 5. You -+ have to cleanup this buffer, LodePNG will never free it. Don't forget that filter_palette_zero -+ must be set to 0 to ensure this is also used on palette or low bitdepth images.*/ -+ const unsigned char* predefined_filters; -+ -+ /*force creating a PLTE chunk if colortype is 2 or 6 (= a suggested palette). -+ If colortype is 3, PLTE is _always_ created.*/ -+ unsigned force_palette; -+#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS -+ /*add LodePNG identifier and version as a text chunk, for debugging*/ -+ unsigned add_id; -+ /*encode text chunks as zTXt chunks instead of tEXt chunks, and use compression in iTXt chunks*/ -+ unsigned text_compression; -+#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ -+} LodePNGEncoderSettings; -+ -+void lodepng_encoder_settings_init(LodePNGEncoderSettings* settings); -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ -+ -+#if defined(LODEPNG_COMPILE_DECODER) || defined(LODEPNG_COMPILE_ENCODER) -+/*The settings, state and information for extended encoding and decoding.*/ -+typedef struct LodePNGState -+{ -+#ifdef LODEPNG_COMPILE_DECODER -+ LodePNGDecoderSettings decoder; /*the decoding settings*/ -+#endif /*LODEPNG_COMPILE_DECODER*/ -+#ifdef LODEPNG_COMPILE_ENCODER -+ LodePNGEncoderSettings encoder; /*the encoding settings*/ -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ LodePNGColorMode info_raw; /*specifies the format in which you would like to get the raw pixel buffer*/ -+ LodePNGInfo info_png; /*info of the PNG image obtained after decoding*/ -+ unsigned error; -+#ifdef LODEPNG_COMPILE_CPP -+ /* For the lodepng::State subclass. */ -+ virtual ~LodePNGState(){} -+#endif -+} LodePNGState; -+ -+/*init, cleanup and copy functions to use with this struct*/ -+void lodepng_state_init(LodePNGState* state); -+void lodepng_state_cleanup(LodePNGState* state); -+void lodepng_state_copy(LodePNGState* dest, const LodePNGState* source); -+#endif /* defined(LODEPNG_COMPILE_DECODER) || defined(LODEPNG_COMPILE_ENCODER) */ -+ -+#ifdef LODEPNG_COMPILE_DECODER -+/* -+Same as lodepng_decode_memory, but uses a LodePNGState to allow custom settings and -+getting much more information about the PNG image and color mode. -+*/ -+unsigned lodepng_decode(unsigned char** out, unsigned* w, unsigned* h, -+ LodePNGState* state, -+ const unsigned char* in, size_t insize); -+ -+/* -+Read the PNG header, but not the actual data. This returns only the information -+that is in the header chunk of the PNG, such as width, height and color type. The -+information is placed in the info_png field of the LodePNGState. -+*/ -+unsigned lodepng_inspect(unsigned* w, unsigned* h, -+ LodePNGState* state, -+ const unsigned char* in, size_t insize); -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+/*This function allocates the out buffer with standard malloc and stores the size in *outsize.*/ -+unsigned lodepng_encode(unsigned char** out, size_t* outsize, -+ const unsigned char* image, unsigned w, unsigned h, -+ LodePNGState* state); -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ -+/* -+The lodepng_chunk functions are normally not needed, except to traverse the -+unknown chunks stored in the LodePNGInfo struct, or add new ones to it. -+It also allows traversing the chunks of an encoded PNG file yourself. -+ -+PNG standard chunk naming conventions: -+First byte: uppercase = critical, lowercase = ancillary -+Second byte: uppercase = public, lowercase = private -+Third byte: must be uppercase -+Fourth byte: uppercase = unsafe to copy, lowercase = safe to copy -+*/ -+ -+/* -+Gets the length of the data of the chunk. Total chunk length has 12 bytes more. -+There must be at least 4 bytes to read from. If the result value is too large, -+it may be corrupt data. -+*/ -+unsigned lodepng_chunk_length(const unsigned char* chunk); -+ -+/*puts the 4-byte type in null terminated string*/ -+void lodepng_chunk_type(char type[5], const unsigned char* chunk); -+ -+/*check if the type is the given type*/ -+unsigned char lodepng_chunk_type_equals(const unsigned char* chunk, const char* type); -+ -+/*0: it's one of the critical chunk types, 1: it's an ancillary chunk (see PNG standard)*/ -+unsigned char lodepng_chunk_ancillary(const unsigned char* chunk); -+ -+/*0: public, 1: private (see PNG standard)*/ -+unsigned char lodepng_chunk_private(const unsigned char* chunk); -+ -+/*0: the chunk is unsafe to copy, 1: the chunk is safe to copy (see PNG standard)*/ -+unsigned char lodepng_chunk_safetocopy(const unsigned char* chunk); -+ -+/*get pointer to the data of the chunk, where the input points to the header of the chunk*/ -+unsigned char* lodepng_chunk_data(unsigned char* chunk); -+const unsigned char* lodepng_chunk_data_const(const unsigned char* chunk); -+ -+/*returns 0 if the crc is correct, 1 if it's incorrect (0 for OK as usual!)*/ -+unsigned lodepng_chunk_check_crc(const unsigned char* chunk); -+ -+/*generates the correct CRC from the data and puts it in the last 4 bytes of the chunk*/ -+void lodepng_chunk_generate_crc(unsigned char* chunk); -+ -+/*iterate to next chunks. don't use on IEND chunk, as there is no next chunk then*/ -+unsigned char* lodepng_chunk_next(unsigned char* chunk); -+const unsigned char* lodepng_chunk_next_const(const unsigned char* chunk); -+ -+/* -+Appends chunk to the data in out. The given chunk should already have its chunk header. -+The out variable and outlength are updated to reflect the new reallocated buffer. -+Returns error code (0 if it went ok) -+*/ -+unsigned lodepng_chunk_append(unsigned char** out, size_t* outlength, const unsigned char* chunk); -+ -+/* -+Appends new chunk to out. The chunk to append is given by giving its length, type -+and data separately. The type is a 4-letter string. -+The out variable and outlength are updated to reflect the new reallocated buffer. -+Returne error code (0 if it went ok) -+*/ -+unsigned lodepng_chunk_create(unsigned char** out, size_t* outlength, unsigned length, -+ const char* type, const unsigned char* data); -+ -+ -+/*Calculate CRC32 of buffer*/ -+unsigned lodepng_crc32(const unsigned char* buf, size_t len); -+#endif /*LODEPNG_COMPILE_PNG*/ -+ -+ -+#ifdef LODEPNG_COMPILE_ZLIB -+/* -+This zlib part can be used independently to zlib compress and decompress a -+buffer. It cannot be used to create gzip files however, and it only supports the -+part of zlib that is required for PNG, it does not support dictionaries. -+*/ -+ -+#ifdef LODEPNG_COMPILE_DECODER -+/*Inflate a buffer. Inflate is the decompression step of deflate. Out buffer must be freed after use.*/ -+unsigned lodepng_inflate(unsigned char** out, size_t* outsize, -+ const unsigned char* in, size_t insize, -+ const LodePNGDecompressSettings* settings); -+ -+/* -+Decompresses Zlib data. Reallocates the out buffer and appends the data. The -+data must be according to the zlib specification. -+Either, *out must be NULL and *outsize must be 0, or, *out must be a valid -+buffer and *outsize its size in bytes. out must be freed by user after usage. -+*/ -+unsigned lodepng_zlib_decompress(unsigned char** out, size_t* outsize, -+ const unsigned char* in, size_t insize, -+ const LodePNGDecompressSettings* settings); -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+/* -+Compresses data with Zlib. Reallocates the out buffer and appends the data. -+Zlib adds a small header and trailer around the deflate data. -+The data is output in the format of the zlib specification. -+Either, *out must be NULL and *outsize must be 0, or, *out must be a valid -+buffer and *outsize its size in bytes. out must be freed by user after usage. -+*/ -+unsigned lodepng_zlib_compress(unsigned char** out, size_t* outsize, -+ const unsigned char* in, size_t insize, -+ const LodePNGCompressSettings* settings); -+ -+/* -+Find length-limited Huffman code for given frequencies. This function is in the -+public interface only for tests, it's used internally by lodepng_deflate. -+*/ -+unsigned lodepng_huffman_code_lengths(unsigned* lengths, const unsigned* frequencies, -+ size_t numcodes, unsigned maxbitlen); -+ -+/*Compress a buffer with deflate. See RFC 1951. Out buffer must be freed after use.*/ -+unsigned lodepng_deflate(unsigned char** out, size_t* outsize, -+ const unsigned char* in, size_t insize, -+ const LodePNGCompressSettings* settings); -+ -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+#endif /*LODEPNG_COMPILE_ZLIB*/ -+ -+#ifdef LODEPNG_COMPILE_DISK -+/* -+Load a file from disk into buffer. The function allocates the out buffer, and -+after usage you should free it. -+out: output parameter, contains pointer to loaded buffer. -+outsize: output parameter, size of the allocated out buffer -+filename: the path to the file to load -+return value: error code (0 means ok) -+*/ -+unsigned lodepng_load_file(unsigned char** out, size_t* outsize, const char* filename); -+ -+/* -+Save a file from buffer to disk. Warning, if it exists, this function overwrites -+the file without warning! -+buffer: the buffer to write -+buffersize: size of the buffer to write -+filename: the path to the file to save to -+return value: error code (0 means ok) -+*/ -+unsigned lodepng_save_file(const unsigned char* buffer, size_t buffersize, const char* filename); -+#endif /*LODEPNG_COMPILE_DISK*/ -+ -+#ifdef LODEPNG_COMPILE_CPP -+/* The LodePNG C++ wrapper uses std::vectors instead of manually allocated memory buffers. */ -+namespace lodepng -+{ -+#ifdef LODEPNG_COMPILE_PNG -+class State : public LodePNGState -+{ -+ public: -+ State(); -+ State(const State& other); -+ virtual ~State(); -+ State& operator=(const State& other); -+}; -+ -+#ifdef LODEPNG_COMPILE_DECODER -+/* Same as other lodepng::decode, but using a State for more settings and information. */ -+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, -+ State& state, -+ const unsigned char* in, size_t insize); -+unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, -+ State& state, -+ const std::vector<unsigned char>& in); -+#endif /*LODEPNG_COMPILE_DECODER*/ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+/* Same as other lodepng::encode, but using a State for more settings and information. */ -+unsigned encode(std::vector<unsigned char>& out, -+ const unsigned char* in, unsigned w, unsigned h, -+ State& state); -+unsigned encode(std::vector<unsigned char>& out, -+ const std::vector<unsigned char>& in, unsigned w, unsigned h, -+ State& state); -+#endif /*LODEPNG_COMPILE_ENCODER*/ -+ -+#ifdef LODEPNG_COMPILE_DISK -+/* -+Load a file from disk into an std::vector. -+return value: error code (0 means ok) -+*/ -+unsigned load_file(std::vector<unsigned char>& buffer, const std::string& filename); -+ -+/* -+Save the binary data in an std::vector to a file on disk. The file is overwritten -+without warning. -+*/ -+unsigned save_file(const std::vector<unsigned char>& buffer, const std::string& filename); -+#endif /* LODEPNG_COMPILE_DISK */ -+#endif /* LODEPNG_COMPILE_PNG */ -+ -+#ifdef LODEPNG_COMPILE_ZLIB -+#ifdef LODEPNG_COMPILE_DECODER -+/* Zlib-decompress an unsigned char buffer */ -+unsigned decompress(std::vector<unsigned char>& out, const unsigned char* in, size_t insize, -+ const LodePNGDecompressSettings& settings = lodepng_default_decompress_settings); -+ -+/* Zlib-decompress an std::vector */ -+unsigned decompress(std::vector<unsigned char>& out, const std::vector<unsigned char>& in, -+ const LodePNGDecompressSettings& settings = lodepng_default_decompress_settings); -+#endif /* LODEPNG_COMPILE_DECODER */ -+ -+#ifdef LODEPNG_COMPILE_ENCODER -+/* Zlib-compress an unsigned char buffer */ -+unsigned compress(std::vector<unsigned char>& out, const unsigned char* in, size_t insize, -+ const LodePNGCompressSettings& settings = lodepng_default_compress_settings); -+ -+/* Zlib-compress an std::vector */ -+unsigned compress(std::vector<unsigned char>& out, const std::vector<unsigned char>& in, -+ const LodePNGCompressSettings& settings = lodepng_default_compress_settings); -+#endif /* LODEPNG_COMPILE_ENCODER */ -+#endif /* LODEPNG_COMPILE_ZLIB */ -+} /* namespace lodepng */ -+#endif /*LODEPNG_COMPILE_CPP*/ -+ -+/* -+TODO: -+[.] test if there are no memory leaks or security exploits - done a lot but needs to be checked often -+[.] check compatibility with various compilers - done but needs to be redone for every newer version -+[X] converting color to 16-bit per channel types -+[ ] read all public PNG chunk types (but never let the color profile and gamma ones touch RGB values) -+[ ] make sure encoder generates no chunks with size > (2^31)-1 -+[ ] partial decoding (stream processing) -+[X] let the "isFullyOpaque" function check color keys and transparent palettes too -+[X] better name for the variables "codes", "codesD", "codelengthcodes", "clcl" and "lldl" -+[ ] don't stop decoding on errors like 69, 57, 58 (make warnings) -+[ ] let the C++ wrapper catch exceptions coming from the standard library and return LodePNG error codes -+[ ] allow user to provide custom color conversion functions, e.g. for premultiplied alpha, padding bits or not, ... -+[ ] allow user to give data (void*) to custom allocator -+*/ -+ -+#endif /*LODEPNG_H inclusion guard*/ -+ -+/* -+LodePNG Documentation -+--------------------- -+ -+0. table of contents -+-------------------- -+ -+ 1. about -+ 1.1. supported features -+ 1.2. features not supported -+ 2. C and C++ version -+ 3. security -+ 4. decoding -+ 5. encoding -+ 6. color conversions -+ 6.1. PNG color types -+ 6.2. color conversions -+ 6.3. padding bits -+ 6.4. A note about 16-bits per channel and endianness -+ 7. error values -+ 8. chunks and PNG editing -+ 9. compiler support -+ 10. examples -+ 10.1. decoder C++ example -+ 10.2. decoder C example -+ 11. state settings reference -+ 12. changes -+ 13. contact information -+ -+ -+1. about -+-------- -+ -+PNG is a file format to store raster images losslessly with good compression, -+supporting different color types and alpha channel. -+ -+LodePNG is a PNG codec according to the Portable Network Graphics (PNG) -+Specification (Second Edition) - W3C Recommendation 10 November 2003. -+ -+The specifications used are: -+ -+*) Portable Network Graphics (PNG) Specification (Second Edition): -+ http://www.w3.org/TR/2003/REC-PNG-20031110 -+*) RFC 1950 ZLIB Compressed Data Format version 3.3: -+ http://www.gzip.org/zlib/rfc-zlib.html -+*) RFC 1951 DEFLATE Compressed Data Format Specification ver 1.3: -+ http://www.gzip.org/zlib/rfc-deflate.html -+ -+The most recent version of LodePNG can currently be found at -+http://lodev.org/lodepng/ -+ -+LodePNG works both in C (ISO C90) and C++, with a C++ wrapper that adds -+extra functionality. -+ -+LodePNG exists out of two files: -+-lodepng.h: the header file for both C and C++ -+-lodepng.c(pp): give it the name lodepng.c or lodepng.cpp (or .cc) depending on your usage -+ -+If you want to start using LodePNG right away without reading this doc, get the -+examples from the LodePNG website to see how to use it in code, or check the -+smaller examples in chapter 13 here. -+ -+LodePNG is simple but only supports the basic requirements. To achieve -+simplicity, the following design choices were made: There are no dependencies -+on any external library. There are functions to decode and encode a PNG with -+a single function call, and extended versions of these functions taking a -+LodePNGState struct allowing to specify or get more information. By default -+the colors of the raw image are always RGB or RGBA, no matter what color type -+the PNG file uses. To read and write files, there are simple functions to -+convert the files to/from buffers in memory. -+ -+This all makes LodePNG suitable for loading textures in games, demos and small -+programs, ... It's less suitable for full fledged image editors, loading PNGs -+over network (it requires all the image data to be available before decoding can -+begin), life-critical systems, ... -+ -+1.1. supported features -+----------------------- -+ -+The following features are supported by the decoder: -+ -+*) decoding of PNGs with any color type, bit depth and interlace mode, to a 24- or 32-bit color raw image, -+ or the same color type as the PNG -+*) encoding of PNGs, from any raw image to 24- or 32-bit color, or the same color type as the raw image -+*) Adam7 interlace and deinterlace for any color type -+*) loading the image from harddisk or decoding it from a buffer from other sources than harddisk -+*) support for alpha channels, including RGBA color model, translucent palettes and color keying -+*) zlib decompression (inflate) -+*) zlib compression (deflate) -+*) CRC32 and ADLER32 checksums -+*) handling of unknown chunks, allowing making a PNG editor that stores custom and unknown chunks. -+*) the following chunks are supported (generated/interpreted) by both encoder and decoder: -+ IHDR: header information -+ PLTE: color palette -+ IDAT: pixel data -+ IEND: the final chunk -+ tRNS: transparency for palettized images -+ tEXt: textual information -+ zTXt: compressed textual information -+ iTXt: international textual information -+ bKGD: suggested background color -+ pHYs: physical dimensions -+ tIME: modification time -+ -+1.2. features not supported -+--------------------------- -+ -+The following features are _not_ supported: -+ -+*) some features needed to make a conformant PNG-Editor might be still missing. -+*) partial loading/stream processing. All data must be available and is processed in one call. -+*) The following public chunks are not supported but treated as unknown chunks by LodePNG -+ cHRM, gAMA, iCCP, sRGB, sBIT, hIST, sPLT -+ Some of these are not supported on purpose: LodePNG wants to provide the RGB values -+ stored in the pixels, not values modified by system dependent gamma or color models. -+ -+ -+2. C and C++ version -+-------------------- -+ -+The C version uses buffers allocated with alloc that you need to free() -+yourself. You need to use init and cleanup functions for each struct whenever -+using a struct from the C version to avoid exploits and memory leaks. -+ -+The C++ version has extra functions with std::vectors in the interface and the -+lodepng::State class which is a LodePNGState with constructor and destructor. -+ -+These files work without modification for both C and C++ compilers because all -+the additional C++ code is in "#ifdef __cplusplus" blocks that make C-compilers -+ignore it, and the C code is made to compile both with strict ISO C90 and C++. -+ -+To use the C++ version, you need to rename the source file to lodepng.cpp -+(instead of lodepng.c), and compile it with a C++ compiler. -+ -+To use the C version, you need to rename the source file to lodepng.c (instead -+of lodepng.cpp), and compile it with a C compiler. -+ -+ -+3. Security -+----------- -+ -+Even if carefully designed, it's always possible that LodePNG contains possible -+exploits. If you discover one, please let me know, and it will be fixed. -+ -+When using LodePNG, care has to be taken with the C version of LodePNG, as well -+as the C-style structs when working with C++. The following conventions are used -+for all C-style structs: -+ -+-if a struct has a corresponding init function, always call the init function when making a new one -+-if a struct has a corresponding cleanup function, call it before the struct disappears to avoid memory leaks -+-if a struct has a corresponding copy function, use the copy function instead of "=". -+ The destination must also be inited already. -+ -+ -+4. Decoding -+----------- -+ -+Decoding converts a PNG compressed image to a raw pixel buffer. -+ -+Most documentation on using the decoder is at its declarations in the header -+above. For C, simple decoding can be done with functions such as -+lodepng_decode32, and more advanced decoding can be done with the struct -+LodePNGState and lodepng_decode. For C++, all decoding can be done with the -+various lodepng::decode functions, and lodepng::State can be used for advanced -+features. -+ -+When using the LodePNGState, it uses the following fields for decoding: -+*) LodePNGInfo info_png: it stores extra information about the PNG (the input) in here -+*) LodePNGColorMode info_raw: here you can say what color mode of the raw image (the output) you want to get -+*) LodePNGDecoderSettings decoder: you can specify a few extra settings for the decoder to use -+ -+LodePNGInfo info_png -+-------------------- -+ -+After decoding, this contains extra information of the PNG image, except the actual -+pixels, width and height because these are already gotten directly from the decoder -+functions. -+ -+It contains for example the original color type of the PNG image, text comments, -+suggested background color, etc... More details about the LodePNGInfo struct are -+at its declaration documentation. -+ -+LodePNGColorMode info_raw -+------------------------- -+ -+When decoding, here you can specify which color type you want -+the resulting raw image to be. If this is different from the colortype of the -+PNG, then the decoder will automatically convert the result. This conversion -+always works, except if you want it to convert a color PNG to greyscale or to -+a palette with missing colors. -+ -+By default, 32-bit color is used for the result. -+ -+LodePNGDecoderSettings decoder -+------------------------------ -+ -+The settings can be used to ignore the errors created by invalid CRC and Adler32 -+chunks, and to disable the decoding of tEXt chunks. -+ -+There's also a setting color_convert, true by default. If false, no conversion -+is done, the resulting data will be as it was in the PNG (after decompression) -+and you'll have to puzzle the colors of the pixels together yourself using the -+color type information in the LodePNGInfo. -+ -+ -+5. Encoding -+----------- -+ -+Encoding converts a raw pixel buffer to a PNG compressed image. -+ -+Most documentation on using the encoder is at its declarations in the header -+above. For C, simple encoding can be done with functions such as -+lodepng_encode32, and more advanced decoding can be done with the struct -+LodePNGState and lodepng_encode. For C++, all encoding can be done with the -+various lodepng::encode functions, and lodepng::State can be used for advanced -+features. -+ -+Like the decoder, the encoder can also give errors. However it gives less errors -+since the encoder input is trusted, the decoder input (a PNG image that could -+be forged by anyone) is not trusted. -+ -+When using the LodePNGState, it uses the following fields for encoding: -+*) LodePNGInfo info_png: here you specify how you want the PNG (the output) to be. -+*) LodePNGColorMode info_raw: here you say what color type of the raw image (the input) has -+*) LodePNGEncoderSettings encoder: you can specify a few settings for the encoder to use -+ -+LodePNGInfo info_png -+-------------------- -+ -+When encoding, you use this the opposite way as when decoding: for encoding, -+you fill in the values you want the PNG to have before encoding. By default it's -+not needed to specify a color type for the PNG since it's automatically chosen, -+but it's possible to choose it yourself given the right settings. -+ -+The encoder will not always exactly match the LodePNGInfo struct you give, -+it tries as close as possible. Some things are ignored by the encoder. The -+encoder uses, for example, the following settings from it when applicable: -+colortype and bitdepth, text chunks, time chunk, the color key, the palette, the -+background color, the interlace method, unknown chunks, ... -+ -+When encoding to a PNG with colortype 3, the encoder will generate a PLTE chunk. -+If the palette contains any colors for which the alpha channel is not 255 (so -+there are translucent colors in the palette), it'll add a tRNS chunk. -+ -+LodePNGColorMode info_raw -+------------------------- -+ -+You specify the color type of the raw image that you give to the input here, -+including a possible transparent color key and palette you happen to be using in -+your raw image data. -+ -+By default, 32-bit color is assumed, meaning your input has to be in RGBA -+format with 4 bytes (unsigned chars) per pixel. -+ -+LodePNGEncoderSettings encoder -+------------------------------ -+ -+The following settings are supported (some are in sub-structs): -+*) auto_convert: when this option is enabled, the encoder will -+automatically choose the smallest possible color mode (including color key) that -+can encode the colors of all pixels without information loss. -+*) btype: the block type for LZ77. 0 = uncompressed, 1 = fixed huffman tree, -+ 2 = dynamic huffman tree (best compression). Should be 2 for proper -+ compression. -+*) use_lz77: whether or not to use LZ77 for compressed block types. Should be -+ true for proper compression. -+*) windowsize: the window size used by the LZ77 encoder (1 - 32768). Has value -+ 2048 by default, but can be set to 32768 for better, but slow, compression. -+*) force_palette: if colortype is 2 or 6, you can make the encoder write a PLTE -+ chunk if force_palette is true. This can used as suggested palette to convert -+ to by viewers that don't support more than 256 colors (if those still exist) -+*) add_id: add text chunk "Encoder: LodePNG <version>" to the image. -+*) text_compression: default 1. If 1, it'll store texts as zTXt instead of tEXt chunks. -+ zTXt chunks use zlib compression on the text. This gives a smaller result on -+ large texts but a larger result on small texts (such as a single program name). -+ It's all tEXt or all zTXt though, there's no separate setting per text yet. -+ -+ -+6. color conversions -+-------------------- -+ -+An important thing to note about LodePNG, is that the color type of the PNG, and -+the color type of the raw image, are completely independent. By default, when -+you decode a PNG, you get the result as a raw image in the color type you want, -+no matter whether the PNG was encoded with a palette, greyscale or RGBA color. -+And if you encode an image, by default LodePNG will automatically choose the PNG -+color type that gives good compression based on the values of colors and amount -+of colors in the image. It can be configured to let you control it instead as -+well, though. -+ -+To be able to do this, LodePNG does conversions from one color mode to another. -+It can convert from almost any color type to any other color type, except the -+following conversions: RGB to greyscale is not supported, and converting to a -+palette when the palette doesn't have a required color is not supported. This is -+not supported on purpose: this is information loss which requires a color -+reduction algorithm that is beyong the scope of a PNG encoder (yes, RGB to grey -+is easy, but there are multiple ways if you want to give some channels more -+weight). -+ -+By default, when decoding, you get the raw image in 32-bit RGBA or 24-bit RGB -+color, no matter what color type the PNG has. And by default when encoding, -+LodePNG automatically picks the best color model for the output PNG, and expects -+the input image to be 32-bit RGBA or 24-bit RGB. So, unless you want to control -+the color format of the images yourself, you can skip this chapter. -+ -+6.1. PNG color types -+-------------------- -+ -+A PNG image can have many color types, ranging from 1-bit color to 64-bit color, -+as well as palettized color modes. After the zlib decompression and unfiltering -+in the PNG image is done, the raw pixel data will have that color type and thus -+a certain amount of bits per pixel. If you want the output raw image after -+decoding to have another color type, a conversion is done by LodePNG. -+ -+The PNG specification gives the following color types: -+ -+0: greyscale, bit depths 1, 2, 4, 8, 16 -+2: RGB, bit depths 8 and 16 -+3: palette, bit depths 1, 2, 4 and 8 -+4: greyscale with alpha, bit depths 8 and 16 -+6: RGBA, bit depths 8 and 16 -+ -+Bit depth is the amount of bits per pixel per color channel. So the total amount -+of bits per pixel is: amount of channels * bitdepth. -+ -+6.2. color conversions -+---------------------- -+ -+As explained in the sections about the encoder and decoder, you can specify -+color types and bit depths in info_png and info_raw to change the default -+behaviour. -+ -+If, when decoding, you want the raw image to be something else than the default, -+you need to set the color type and bit depth you want in the LodePNGColorMode, -+or the parameters colortype and bitdepth of the simple decoding function. -+ -+If, when encoding, you use another color type than the default in the raw input -+image, you need to specify its color type and bit depth in the LodePNGColorMode -+of the raw image, or use the parameters colortype and bitdepth of the simple -+encoding function. -+ -+If, when encoding, you don't want LodePNG to choose the output PNG color type -+but control it yourself, you need to set auto_convert in the encoder settings -+to false, and specify the color type you want in the LodePNGInfo of the -+encoder (including palette: it can generate a palette if auto_convert is true, -+otherwise not). -+ -+If the input and output color type differ (whether user chosen or auto chosen), -+LodePNG will do a color conversion, which follows the rules below, and may -+sometimes result in an error. -+ -+To avoid some confusion: -+-the decoder converts from PNG to raw image -+-the encoder converts from raw image to PNG -+-the colortype and bitdepth in LodePNGColorMode info_raw, are those of the raw image -+-the colortype and bitdepth in the color field of LodePNGInfo info_png, are those of the PNG -+-when encoding, the color type in LodePNGInfo is ignored if auto_convert -+ is enabled, it is automatically generated instead -+-when decoding, the color type in LodePNGInfo is set by the decoder to that of the original -+ PNG image, but it can be ignored since the raw image has the color type you requested instead -+-if the color type of the LodePNGColorMode and PNG image aren't the same, a conversion -+ between the color types is done if the color types are supported. If it is not -+ supported, an error is returned. If the types are the same, no conversion is done. -+-even though some conversions aren't supported, LodePNG supports loading PNGs from any -+ colortype and saving PNGs to any colortype, sometimes it just requires preparing -+ the raw image correctly before encoding. -+-both encoder and decoder use the same color converter. -+ -+Non supported color conversions: -+-color to greyscale: no error is thrown, but the result will look ugly because -+only the red channel is taken -+-anything to palette when that palette does not have that color in it: in this -+case an error is thrown -+ -+Supported color conversions: -+-anything to 8-bit RGB, 8-bit RGBA, 16-bit RGB, 16-bit RGBA -+-any grey or grey+alpha, to grey or grey+alpha -+-anything to a palette, as long as the palette has the requested colors in it -+-removing alpha channel -+-higher to smaller bitdepth, and vice versa -+ -+If you want no color conversion to be done (e.g. for speed or control): -+-In the encoder, you can make it save a PNG with any color type by giving the -+raw color mode and LodePNGInfo the same color mode, and setting auto_convert to -+false. -+-In the decoder, you can make it store the pixel data in the same color type -+as the PNG has, by setting the color_convert setting to false. Settings in -+info_raw are then ignored. -+ -+The function lodepng_convert does the color conversion. It is available in the -+interface but normally isn't needed since the encoder and decoder already call -+it. -+ -+6.3. padding bits -+----------------- -+ -+In the PNG file format, if a less than 8-bit per pixel color type is used and the scanlines -+have a bit amount that isn't a multiple of 8, then padding bits are used so that each -+scanline starts at a fresh byte. But that is NOT true for the LodePNG raw input and output. -+The raw input image you give to the encoder, and the raw output image you get from the decoder -+will NOT have these padding bits, e.g. in the case of a 1-bit image with a width -+of 7 pixels, the first pixel of the second scanline will the the 8th bit of the first byte, -+not the first bit of a new byte. -+ -+6.4. A note about 16-bits per channel and endianness -+---------------------------------------------------- -+ -+LodePNG uses unsigned char arrays for 16-bit per channel colors too, just like -+for any other color format. The 16-bit values are stored in big endian (most -+significant byte first) in these arrays. This is the opposite order of the -+little endian used by x86 CPU's. -+ -+LodePNG always uses big endian because the PNG file format does so internally. -+Conversions to other formats than PNG uses internally are not supported by -+LodePNG on purpose, there are myriads of formats, including endianness of 16-bit -+colors, the order in which you store R, G, B and A, and so on. Supporting and -+converting to/from all that is outside the scope of LodePNG. -+ -+This may mean that, depending on your use case, you may want to convert the big -+endian output of LodePNG to little endian with a for loop. This is certainly not -+always needed, many applications and libraries support big endian 16-bit colors -+anyway, but it means you cannot simply cast the unsigned char* buffer to an -+unsigned short* buffer on x86 CPUs. -+ -+ -+7. error values -+--------------- -+ -+All functions in LodePNG that return an error code, return 0 if everything went -+OK, or a non-zero code if there was an error. -+ -+The meaning of the LodePNG error values can be retrieved with the function -+lodepng_error_text: given the numerical error code, it returns a description -+of the error in English as a string. -+ -+Check the implementation of lodepng_error_text to see the meaning of each code. -+ -+ -+8. chunks and PNG editing -+------------------------- -+ -+If you want to add extra chunks to a PNG you encode, or use LodePNG for a PNG -+editor that should follow the rules about handling of unknown chunks, or if your -+program is able to read other types of chunks than the ones handled by LodePNG, -+then that's possible with the chunk functions of LodePNG. -+ -+A PNG chunk has the following layout: -+ -+4 bytes length -+4 bytes type name -+length bytes data -+4 bytes CRC -+ -+8.1. iterating through chunks -+----------------------------- -+ -+If you have a buffer containing the PNG image data, then the first chunk (the -+IHDR chunk) starts at byte number 8 of that buffer. The first 8 bytes are the -+signature of the PNG and are not part of a chunk. But if you start at byte 8 -+then you have a chunk, and can check the following things of it. -+ -+NOTE: none of these functions check for memory buffer boundaries. To avoid -+exploits, always make sure the buffer contains all the data of the chunks. -+When using lodepng_chunk_next, make sure the returned value is within the -+allocated memory. -+ -+unsigned lodepng_chunk_length(const unsigned char* chunk): -+ -+Get the length of the chunk's data. The total chunk length is this length + 12. -+ -+void lodepng_chunk_type(char type[5], const unsigned char* chunk): -+unsigned char lodepng_chunk_type_equals(const unsigned char* chunk, const char* type): -+ -+Get the type of the chunk or compare if it's a certain type -+ -+unsigned char lodepng_chunk_critical(const unsigned char* chunk): -+unsigned char lodepng_chunk_private(const unsigned char* chunk): -+unsigned char lodepng_chunk_safetocopy(const unsigned char* chunk): -+ -+Check if the chunk is critical in the PNG standard (only IHDR, PLTE, IDAT and IEND are). -+Check if the chunk is private (public chunks are part of the standard, private ones not). -+Check if the chunk is safe to copy. If it's not, then, when modifying data in a critical -+chunk, unsafe to copy chunks of the old image may NOT be saved in the new one if your -+program doesn't handle that type of unknown chunk. -+ -+unsigned char* lodepng_chunk_data(unsigned char* chunk): -+const unsigned char* lodepng_chunk_data_const(const unsigned char* chunk): -+ -+Get a pointer to the start of the data of the chunk. -+ -+unsigned lodepng_chunk_check_crc(const unsigned char* chunk): -+void lodepng_chunk_generate_crc(unsigned char* chunk): -+ -+Check if the crc is correct or generate a correct one. -+ -+unsigned char* lodepng_chunk_next(unsigned char* chunk): -+const unsigned char* lodepng_chunk_next_const(const unsigned char* chunk): -+ -+Iterate to the next chunk. This works if you have a buffer with consecutive chunks. Note that these -+functions do no boundary checking of the allocated data whatsoever, so make sure there is enough -+data available in the buffer to be able to go to the next chunk. -+ -+unsigned lodepng_chunk_append(unsigned char** out, size_t* outlength, const unsigned char* chunk): -+unsigned lodepng_chunk_create(unsigned char** out, size_t* outlength, unsigned length, -+ const char* type, const unsigned char* data): -+ -+These functions are used to create new chunks that are appended to the data in *out that has -+length *outlength. The append function appends an existing chunk to the new data. The create -+function creates a new chunk with the given parameters and appends it. Type is the 4-letter -+name of the chunk. -+ -+8.2. chunks in info_png -+----------------------- -+ -+The LodePNGInfo struct contains fields with the unknown chunk in it. It has 3 -+buffers (each with size) to contain 3 types of unknown chunks: -+the ones that come before the PLTE chunk, the ones that come between the PLTE -+and the IDAT chunks, and the ones that come after the IDAT chunks. -+It's necessary to make the distionction between these 3 cases because the PNG -+standard forces to keep the ordering of unknown chunks compared to the critical -+chunks, but does not force any other ordering rules. -+ -+info_png.unknown_chunks_data[0] is the chunks before PLTE -+info_png.unknown_chunks_data[1] is the chunks after PLTE, before IDAT -+info_png.unknown_chunks_data[2] is the chunks after IDAT -+ -+The chunks in these 3 buffers can be iterated through and read by using the same -+way described in the previous subchapter. -+ -+When using the decoder to decode a PNG, you can make it store all unknown chunks -+if you set the option settings.remember_unknown_chunks to 1. By default, this -+option is off (0). -+ -+The encoder will always encode unknown chunks that are stored in the info_png. -+If you need it to add a particular chunk that isn't known by LodePNG, you can -+use lodepng_chunk_append or lodepng_chunk_create to the chunk data in -+info_png.unknown_chunks_data[x]. -+ -+Chunks that are known by LodePNG should not be added in that way. E.g. to make -+LodePNG add a bKGD chunk, set background_defined to true and add the correct -+parameters there instead. -+ -+ -+9. compiler support -+------------------- -+ -+No libraries other than the current standard C library are needed to compile -+LodePNG. For the C++ version, only the standard C++ library is needed on top. -+Add the files lodepng.c(pp) and lodepng.h to your project, include -+lodepng.h where needed, and your program can read/write PNG files. -+ -+It is compatible with C90 and up, and C++03 and up. -+ -+If performance is important, use optimization when compiling! For both the -+encoder and decoder, this makes a large difference. -+ -+Make sure that LodePNG is compiled with the same compiler of the same version -+and with the same settings as the rest of the program, or the interfaces with -+std::vectors and std::strings in C++ can be incompatible. -+ -+CHAR_BITS must be 8 or higher, because LodePNG uses unsigned chars for octets. -+ -+*) gcc and g++ -+ -+LodePNG is developed in gcc so this compiler is natively supported. It gives no -+warnings with compiler options "-Wall -Wextra -pedantic -ansi", with gcc and g++ -+version 4.7.1 on Linux, 32-bit and 64-bit. -+ -+*) Clang -+ -+Fully supported and warning-free. -+ -+*) Mingw -+ -+The Mingw compiler (a port of gcc for Windows) should be fully supported by -+LodePNG. -+ -+*) Visual Studio and Visual C++ Express Edition -+ -+LodePNG should be warning-free with warning level W4. Two warnings were disabled -+with pragmas though: warning 4244 about implicit conversions, and warning 4996 -+where it wants to use a non-standard function fopen_s instead of the standard C -+fopen. -+ -+Visual Studio may want "stdafx.h" files to be included in each source file and -+give an error "unexpected end of file while looking for precompiled header". -+This is not standard C++ and will not be added to the stock LodePNG. You can -+disable it for lodepng.cpp only by right clicking it, Properties, C/C++, -+Precompiled Headers, and set it to Not Using Precompiled Headers there. -+ -+NOTE: Modern versions of VS should be fully supported, but old versions, e.g. -+VS6, are not guaranteed to work. -+ -+*) Compilers on Macintosh -+ -+LodePNG has been reported to work both with gcc and LLVM for Macintosh, both for -+C and C++. -+ -+*) Other Compilers -+ -+If you encounter problems on any compilers, feel free to let me know and I may -+try to fix it if the compiler is modern and standards complient. -+ -+ -+10. examples -+------------ -+ -+This decoder example shows the most basic usage of LodePNG. More complex -+examples can be found on the LodePNG website. -+ -+10.1. decoder C++ example -+------------------------- -+ -+#include "lodepng.h" -+#include <iostream> -+ -+int main(int argc, char *argv[]) -+{ -+ const char* filename = argc > 1 ? argv[1] : "test.png"; -+ -+ //load and decode -+ std::vector<unsigned char> image; -+ unsigned width, height; -+ unsigned error = lodepng::decode(image, width, height, filename); -+ -+ //if there's an error, display it -+ if(error) std::cout << "decoder error " << error << ": " << lodepng_error_text(error) << std::endl; -+ -+ //the pixels are now in the vector "image", 4 bytes per pixel, ordered RGBARGBA..., use it as texture, draw it, ... -+} -+ -+10.2. decoder C example -+----------------------- -+ -+#include "lodepng.h" -+ -+int main(int argc, char *argv[]) -+{ -+ unsigned error; -+ unsigned char* image; -+ size_t width, height; -+ const char* filename = argc > 1 ? argv[1] : "test.png"; -+ -+ error = lodepng_decode32_file(&image, &width, &height, filename); -+ -+ if(error) printf("decoder error %u: %s\n", error, lodepng_error_text(error)); -+ -+ / * use image here * / -+ -+ free(image); -+ return 0; -+} -+ -+11. state settings reference -+---------------------------- -+ -+A quick reference of some settings to set on the LodePNGState -+ -+For decoding: -+ -+state.decoder.zlibsettings.ignore_adler32: ignore ADLER32 checksums -+state.decoder.zlibsettings.custom_...: use custom inflate function -+state.decoder.ignore_crc: ignore CRC checksums -+state.decoder.color_convert: convert internal PNG color to chosen one -+state.decoder.read_text_chunks: whether to read in text metadata chunks -+state.decoder.remember_unknown_chunks: whether to read in unknown chunks -+state.info_raw.colortype: desired color type for decoded image -+state.info_raw.bitdepth: desired bit depth for decoded image -+state.info_raw....: more color settings, see struct LodePNGColorMode -+state.info_png....: no settings for decoder but ouput, see struct LodePNGInfo -+ -+For encoding: -+ -+state.encoder.zlibsettings.btype: disable compression by setting it to 0 -+state.encoder.zlibsettings.use_lz77: use LZ77 in compression -+state.encoder.zlibsettings.windowsize: tweak LZ77 windowsize -+state.encoder.zlibsettings.minmatch: tweak min LZ77 length to match -+state.encoder.zlibsettings.nicematch: tweak LZ77 match where to stop searching -+state.encoder.zlibsettings.lazymatching: try one more LZ77 matching -+state.encoder.zlibsettings.custom_...: use custom deflate function -+state.encoder.auto_convert: choose optimal PNG color type, if 0 uses info_png -+state.encoder.filter_palette_zero: PNG filter strategy for palette -+state.encoder.filter_strategy: PNG filter strategy to encode with -+state.encoder.force_palette: add palette even if not encoding to one -+state.encoder.add_id: add LodePNG identifier and version as a text chunk -+state.encoder.text_compression: use compressed text chunks for metadata -+state.info_raw.colortype: color type of raw input image you provide -+state.info_raw.bitdepth: bit depth of raw input image you provide -+state.info_raw: more color settings, see struct LodePNGColorMode -+state.info_png.color.colortype: desired color type if auto_convert is false -+state.info_png.color.bitdepth: desired bit depth if auto_convert is false -+state.info_png.color....: more color settings, see struct LodePNGColorMode -+state.info_png....: more PNG related settings, see struct LodePNGInfo -+ -+ -+12. changes -+----------- -+ -+The version number of LodePNG is the date of the change given in the format -+yyyymmdd. -+ -+Some changes aren't backwards compatible. Those are indicated with a (!) -+symbol. -+ -+*) 18 apr 2016: Changed qsort to custom stable sort (for platforms w/o qsort). -+*) 09 apr 2016: Fixed colorkey usage detection, and better file loading (within -+ the limits of pure C90). -+*) 08 dec 2015: Made load_file function return error if file can't be opened. -+*) 24 okt 2015: Bugfix with decoding to palette output. -+*) 18 apr 2015: Boundary PM instead of just package-merge for faster encoding. -+*) 23 aug 2014: Reduced needless memory usage of decoder. -+*) 28 jun 2014: Removed fix_png setting, always support palette OOB for -+ simplicity. Made ColorProfile public. -+*) 09 jun 2014: Faster encoder by fixing hash bug and more zeros optimization. -+*) 22 dec 2013: Power of two windowsize required for optimization. -+*) 15 apr 2013: Fixed bug with LAC_ALPHA and color key. -+*) 25 mar 2013: Added an optional feature to ignore some PNG errors (fix_png). -+*) 11 mar 2013 (!): Bugfix with custom free. Changed from "my" to "lodepng_" -+ prefix for the custom allocators and made it possible with a new #define to -+ use custom ones in your project without needing to change lodepng's code. -+*) 28 jan 2013: Bugfix with color key. -+*) 27 okt 2012: Tweaks in text chunk keyword length error handling. -+*) 8 okt 2012 (!): Added new filter strategy (entropy) and new auto color mode. -+ (no palette). Better deflate tree encoding. New compression tweak settings. -+ Faster color conversions while decoding. Some internal cleanups. -+*) 23 sep 2012: Reduced warnings in Visual Studio a little bit. -+*) 1 sep 2012 (!): Removed #define's for giving custom (de)compression functions -+ and made it work with function pointers instead. -+*) 23 jun 2012: Added more filter strategies. Made it easier to use custom alloc -+ and free functions and toggle #defines from compiler flags. Small fixes. -+*) 6 may 2012 (!): Made plugging in custom zlib/deflate functions more flexible. -+*) 22 apr 2012 (!): Made interface more consistent, renaming a lot. Removed -+ redundant C++ codec classes. Reduced amount of structs. Everything changed, -+ but it is cleaner now imho and functionality remains the same. Also fixed -+ several bugs and shrunk the implementation code. Made new samples. -+*) 6 nov 2011 (!): By default, the encoder now automatically chooses the best -+ PNG color model and bit depth, based on the amount and type of colors of the -+ raw image. For this, autoLeaveOutAlphaChannel replaced by auto_choose_color. -+*) 9 okt 2011: simpler hash chain implementation for the encoder. -+*) 8 sep 2011: lz77 encoder lazy matching instead of greedy matching. -+*) 23 aug 2011: tweaked the zlib compression parameters after benchmarking. -+ A bug with the PNG filtertype heuristic was fixed, so that it chooses much -+ better ones (it's quite significant). A setting to do an experimental, slow, -+ brute force search for PNG filter types is added. -+*) 17 aug 2011 (!): changed some C zlib related function names. -+*) 16 aug 2011: made the code less wide (max 120 characters per line). -+*) 17 apr 2011: code cleanup. Bugfixes. Convert low to 16-bit per sample colors. -+*) 21 feb 2011: fixed compiling for C90. Fixed compiling with sections disabled. -+*) 11 dec 2010: encoding is made faster, based on suggestion by Peter Eastman -+ to optimize long sequences of zeros. -+*) 13 nov 2010: added LodePNG_InfoColor_hasPaletteAlpha and -+ LodePNG_InfoColor_canHaveAlpha functions for convenience. -+*) 7 nov 2010: added LodePNG_error_text function to get error code description. -+*) 30 okt 2010: made decoding slightly faster -+*) 26 okt 2010: (!) changed some C function and struct names (more consistent). -+ Reorganized the documentation and the declaration order in the header. -+*) 08 aug 2010: only changed some comments and external samples. -+*) 05 jul 2010: fixed bug thanks to warnings in the new gcc version. -+*) 14 mar 2010: fixed bug where too much memory was allocated for char buffers. -+*) 02 sep 2008: fixed bug where it could create empty tree that linux apps could -+ read by ignoring the problem but windows apps couldn't. -+*) 06 jun 2008: added more error checks for out of memory cases. -+*) 26 apr 2008: added a few more checks here and there to ensure more safety. -+*) 06 mar 2008: crash with encoding of strings fixed -+*) 02 feb 2008: support for international text chunks added (iTXt) -+*) 23 jan 2008: small cleanups, and #defines to divide code in sections -+*) 20 jan 2008: support for unknown chunks allowing using LodePNG for an editor. -+*) 18 jan 2008: support for tIME and pHYs chunks added to encoder and decoder. -+*) 17 jan 2008: ability to encode and decode compressed zTXt chunks added -+ Also various fixes, such as in the deflate and the padding bits code. -+*) 13 jan 2008: Added ability to encode Adam7-interlaced images. Improved -+ filtering code of encoder. -+*) 07 jan 2008: (!) changed LodePNG to use ISO C90 instead of C++. A -+ C++ wrapper around this provides an interface almost identical to before. -+ Having LodePNG be pure ISO C90 makes it more portable. The C and C++ code -+ are together in these files but it works both for C and C++ compilers. -+*) 29 dec 2007: (!) changed most integer types to unsigned int + other tweaks -+*) 30 aug 2007: bug fixed which makes this Borland C++ compatible -+*) 09 aug 2007: some VS2005 warnings removed again -+*) 21 jul 2007: deflate code placed in new namespace separate from zlib code -+*) 08 jun 2007: fixed bug with 2- and 4-bit color, and small interlaced images -+*) 04 jun 2007: improved support for Visual Studio 2005: crash with accessing -+ invalid std::vector element [0] fixed, and level 3 and 4 warnings removed -+*) 02 jun 2007: made the encoder add a tag with version by default -+*) 27 may 2007: zlib and png code separated (but still in the same file), -+ simple encoder/decoder functions added for more simple usage cases -+*) 19 may 2007: minor fixes, some code cleaning, new error added (error 69), -+ moved some examples from here to lodepng_examples.cpp -+*) 12 may 2007: palette decoding bug fixed -+*) 24 apr 2007: changed the license from BSD to the zlib license -+*) 11 mar 2007: very simple addition: ability to encode bKGD chunks. -+*) 04 mar 2007: (!) tEXt chunk related fixes, and support for encoding -+ palettized PNG images. Plus little interface change with palette and texts. -+*) 03 mar 2007: Made it encode dynamic Huffman shorter with repeat codes. -+ Fixed a bug where the end code of a block had length 0 in the Huffman tree. -+*) 26 feb 2007: Huffman compression with dynamic trees (BTYPE 2) now implemented -+ and supported by the encoder, resulting in smaller PNGs at the output. -+*) 27 jan 2007: Made the Adler-32 test faster so that a timewaste is gone. -+*) 24 jan 2007: gave encoder an error interface. Added color conversion from any -+ greyscale type to 8-bit greyscale with or without alpha. -+*) 21 jan 2007: (!) Totally changed the interface. It allows more color types -+ to convert to and is more uniform. See the manual for how it works now. -+*) 07 jan 2007: Some cleanup & fixes, and a few changes over the last days: -+ encode/decode custom tEXt chunks, separate classes for zlib & deflate, and -+ at last made the decoder give errors for incorrect Adler32 or Crc. -+*) 01 jan 2007: Fixed bug with encoding PNGs with less than 8 bits per channel. -+*) 29 dec 2006: Added support for encoding images without alpha channel, and -+ cleaned out code as well as making certain parts faster. -+*) 28 dec 2006: Added "Settings" to the encoder. -+*) 26 dec 2006: The encoder now does LZ77 encoding and produces much smaller files now. -+ Removed some code duplication in the decoder. Fixed little bug in an example. -+*) 09 dec 2006: (!) Placed output parameters of public functions as first parameter. -+ Fixed a bug of the decoder with 16-bit per color. -+*) 15 okt 2006: Changed documentation structure -+*) 09 okt 2006: Encoder class added. It encodes a valid PNG image from the -+ given image buffer, however for now it's not compressed. -+*) 08 sep 2006: (!) Changed to interface with a Decoder class -+*) 30 jul 2006: (!) LodePNG_InfoPng , width and height are now retrieved in different -+ way. Renamed decodePNG to decodePNGGeneric. -+*) 29 jul 2006: (!) Changed the interface: image info is now returned as a -+ struct of type LodePNG::LodePNG_Info, instead of a vector, which was a bit clumsy. -+*) 28 jul 2006: Cleaned the code and added new error checks. -+ Corrected terminology "deflate" into "inflate". -+*) 23 jun 2006: Added SDL example in the documentation in the header, this -+ example allows easy debugging by displaying the PNG and its transparency. -+*) 22 jun 2006: (!) Changed way to obtain error value. Added -+ loadFile function for convenience. Made decodePNG32 faster. -+*) 21 jun 2006: (!) Changed type of info vector to unsigned. -+ Changed position of palette in info vector. Fixed an important bug that -+ happened on PNGs with an uncompressed block. -+*) 16 jun 2006: Internally changed unsigned into unsigned where -+ needed, and performed some optimizations. -+*) 07 jun 2006: (!) Renamed functions to decodePNG and placed them -+ in LodePNG namespace. Changed the order of the parameters. Rewrote the -+ documentation in the header. Renamed files to lodepng.cpp and lodepng.h -+*) 22 apr 2006: Optimized and improved some code -+*) 07 sep 2005: (!) Changed to std::vector interface -+*) 12 aug 2005: Initial release (C++, decoder only) -+ -+ -+13. contact information -+----------------------- -+ -+Feel free to contact me with suggestions, problems, comments, ... concerning -+LodePNG. If you encounter a PNG image that doesn't work properly with this -+decoder, feel free to send it and I'll use it to find and fix the problem. -+ -+My email address is (puzzle the account and domain together with an @ symbol): -+Domain: gmail dot com. -+Account: lode dot vandevenne. -+ -+ -+Copyright (c) 2005-2016 Lode Vandevenne -+*/ diff --git a/graphics/openfx-arena/files/patch-Extra_ReadPDF.cpp b/graphics/openfx-arena/files/patch-Extra_ReadPDF.cpp deleted file mode 100644 index 7213735c54d8..000000000000 --- a/graphics/openfx-arena/files/patch-Extra_ReadPDF.cpp +++ /dev/null @@ -1,13 +0,0 @@ -Fix build with poppler 0.83 - ---- Extra/ReadPDF.cpp.orig 2020-01-18 15:54:18 UTC -+++ Extra/ReadPDF.cpp -@@ -134,7 +134,7 @@ false - if (!popplerData.empty()) { - struct stat sb; - if (stat(popplerData.c_str(), &sb) == 0 && S_ISDIR(sb.st_mode)) { -- globalParams = new GlobalParams(popplerData.c_str()); -+ globalParams = std::unique_ptr<GlobalParams>(new GlobalParams(popplerData.c_str())); - } - } - } diff --git a/graphics/openfx-arena/files/patch-Makefile.master b/graphics/openfx-arena/files/patch-Makefile.master deleted file mode 100644 index 8235d0d45251..000000000000 --- a/graphics/openfx-arena/files/patch-Makefile.master +++ /dev/null @@ -1,10 +0,0 @@ ---- Makefile.master.orig 2017-01-03 14:53:38 UTC -+++ Makefile.master -@@ -3,6 +3,7 @@ PATHTOROOT = $(SRCDIR)/OpenFX/Support - include $(PATHTOROOT)/Plugins/Makefile.master - - CXXFLAGS += -DOFX_EXTENSIONS_VEGAS -DOFX_EXTENSIONS_NUKE -DOFX_EXTENSIONS_TUTTLE -DOFX_EXTENSIONS_NATRON -DOFX_SUPPORTS_OPENGLRENDER -I$(SRCDIR)/SupportExt -+CXXFLAGS += -I$(SRCDIR)/OpenFX-IO/openfx/Support/include - VPATH += $(SRCDIR)/SupportExt - - # ImageMagick diff --git a/graphics/openfx-arena/pkg-plist b/graphics/openfx-arena/pkg-plist index debb752a491b..c00a85c12f8d 100644 --- a/graphics/openfx-arena/pkg-plist +++ b/graphics/openfx-arena/pkg-plist @@ -21,6 +21,8 @@ OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Implode.png OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Implode.svg OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Modulate.png OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Modulate.svg +OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Morphology.png +OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Morphology.svg OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Oilpaint.png OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Oilpaint.svg OFX/Plugins/Arena.ofx.bundle/Contents/Resources/net.fxarena.openfx.Polar.png |