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Date: Mon, 28 Apr 1997 13:14:20 -0500
Message-Id: <199704281814.NAA31815@nuclecu.unam.mx>
From: Federico Mena <federico@nuclecu.unam.mx>
To: gimp-developer@scam.xcf.berkeley.edu
Subject: PATCH: repeat functions added to blend.c
Reply-to: federico@nuclecu.unam.mx
Hello, everyone
This patch makes the necessary changes to blend.c so that the blend
tool lets you select among three different repeat functions:
- None: this is the default, and it is the way the blend tool always
has worked. On either side of the direction vector, the gradient will
use 0 and 1 values, respectively.
- Sawtooth wave: the gradient will repeat 01->01->01->etc.
- Triangular wave: the gradient will repeat 01->10->01->10->etc.
I have thus added the constants REPEAT-NONE, REPEAT-SAWTOOTH and
REPEAT-TRIANGULAR to Script-fu.
My next patch to blend.c will be to add adaptive supersampling.
Quartic
--- app/blend.dist.c Mon Apr 28 09:06:57 1997
+++ app/blend.c Mon Apr 28 12:51:22 1997
@@ -65,6 +65,15 @@
CUSTOM_MODE
} BlendMode;
+typedef enum
+{
+ REPEAT_NONE,
+ REPEAT_SAWTOOTH,
+ REPEAT_TRIANGULAR,
+} RepeatMode;
+
+typedef double (*RepeatFunc)(double);
+
typedef struct _BlendTool BlendTool;
struct _BlendTool
{
@@ -85,7 +94,7 @@
BlendMode blend_mode;
int paint_mode;
GradientType gradient_type;
- int repeat;
+ RepeatMode repeat;
};
/* local function prototypes */
@@ -93,7 +102,7 @@
static void gradient_type_callback (GtkWidget *, gpointer);
static void blend_mode_callback (GtkWidget *, gpointer);
static void paint_mode_callback (GtkWidget *, gpointer);
-static void repeat_toggle_update (GtkWidget *widget, int *value);
+static void repeat_type_callback (GtkWidget *, gpointer);
static void blend_button_press (Tool *, GdkEventButton *, gpointer);
static void blend_button_release (Tool *, GdkEventButton *, gpointer);
@@ -105,7 +114,7 @@
BlendMode blend_mode, int paint_mode,
GradientType gradient_type,
double opacity, double offset,
- int repeat,
+ RepeatMode repeat,
double startx, double starty,
double endx, double endy);
@@ -125,10 +134,14 @@
static double gradient_calc_shapeburst_spherical_factor (double x, double y);
static double gradient_calc_shapeburst_dimpled_factor (double x, double y);
+static double gradient_repeat_none(double val);
+static double gradient_repeat_sawtooth(double val);
+static double gradient_repeat_triangular(double val);
+
static void gradient_precalc_shapeburst (GImage *gimage, int, PixelRegion *PR, double dist);
static void gradient_fill_region (GImage *gimage, int, PixelRegion *PR,
BlendMode blend_mode, GradientType gradient_type,
- double offset, int repeat, int sx, int sy, int ex, int ey);
+ double offset, RepeatMode repeat, int sx, int sy, int ex, int ey);
static BlendOptions *create_blend_options (void);
static Argument *blend_invoker (Argument *);
@@ -173,6 +186,16 @@
/* blend options */
static BlendOptions *blend_options = NULL;
+/* repeat menu items */
+
+static MenuItem repeat_option_items[] =
+{
+ { "None", 0, 0, repeat_type_callback, (gpointer) REPEAT_NONE, NULL, NULL },
+ { "Sawtooth wave", 0, 0, repeat_type_callback, (gpointer) REPEAT_SAWTOOTH, NULL, NULL },
+ { "Triangular wave", 0, 0, repeat_type_callback, (gpointer) REPEAT_TRIANGULAR, NULL, NULL },
+ { NULL, 0, 0, NULL, NULL, NULL, NULL }
+};
+
static void
blend_scale_update (GtkAdjustment *adjustment,
@@ -203,13 +226,10 @@
}
static void
-repeat_toggle_update(GtkWidget *widget,
- int *value)
+repeat_type_callback(GtkWidget *widget,
+ gpointer client_data)
{
- if (GTK_TOGGLE_BUTTON(widget)->active)
- *value = TRUE;
- else
- *value = FALSE;
+ blend_options->repeat = (RepeatMode) client_data;
}
static BlendOptions *
@@ -225,7 +245,8 @@
GtkWidget *pm_menu;
GtkWidget *gt_option_menu;
GtkWidget *gt_menu;
- GtkWidget *button;
+ GtkWidget *rt_option_menu;
+ GtkWidget *rt_menu;
GtkWidget *opacity_scale;
GtkWidget *table;
GtkWidget *offset_scale;
@@ -239,7 +260,7 @@
options->blend_mode = FG_BG_RGB_MODE;
options->paint_mode = NORMAL;
options->gradient_type = Linear;
- options->repeat = FALSE;
+ options->repeat = REPEAT_NONE;
/* the main vbox */
vbox = gtk_vbox_new (FALSE, 5);
@@ -257,7 +278,7 @@
gtk_widget_show(frame);
/* the table */
- table = gtk_table_new (5, 2, FALSE);
+ table = gtk_table_new (6, 2, FALSE);
gtk_container_border_width (GTK_CONTAINER (table), 5);
gtk_container_add(GTK_CONTAINER(frame), table);
@@ -336,16 +357,22 @@
gtk_widget_show (label);
gtk_widget_show (gt_option_menu);
- gtk_widget_show (table);
-
/* the repeat option */
- button = gtk_check_button_new_with_label("Repeat gradient");
- gtk_box_pack_start(GTK_BOX(vbox), button, TRUE, TRUE, 0);
- gtk_signal_connect(GTK_OBJECT(button), "toggled",
- (GtkSignalFunc) repeat_toggle_update,
- &options->repeat);
- gtk_widget_show(button);
+ label = gtk_label_new("Repeat:");
+ gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.5);
+ gtk_table_attach(GTK_TABLE(table), label, 0, 1, 5, 6,
+ GTK_SHRINK | GTK_FILL, GTK_SHRINK, 0, 2);
+ rt_menu = build_menu(repeat_option_items, NULL);
+ rt_option_menu = gtk_option_menu_new();
+ gtk_table_attach(GTK_TABLE(table), rt_option_menu, 1, 2, 5, 6,
+ GTK_EXPAND | GTK_SHRINK | GTK_FILL, GTK_SHRINK, 4, 2);
+ gtk_widget_show(label);
+ gtk_widget_show(rt_option_menu);
+
+ /* show the whole table */
+
+ gtk_widget_show (table);
/* Register this selection options widget with the main tools options dialog */
tools_register_options (BLEND, vbox);
@@ -354,6 +381,7 @@
gtk_option_menu_set_menu (GTK_OPTION_MENU (bm_option_menu), bm_menu);
gtk_option_menu_set_menu (GTK_OPTION_MENU (gt_option_menu), gt_menu);
gtk_option_menu_set_menu (GTK_OPTION_MENU (pm_option_menu), pm_menu);
+ gtk_option_menu_set_menu (GTK_OPTION_MENU (rt_option_menu), rt_menu);
return options;
}
@@ -561,7 +589,7 @@
GradientType gradient_type,
double opacity,
double offset,
- int repeat,
+ RepeatMode repeat,
double startx,
double starty,
double endx,
@@ -865,6 +893,36 @@
return value;
}
+static double
+gradient_repeat_none(double val)
+{
+ return BOUNDS(val, 0.0, 1.0);
+}
+
+static double
+gradient_repeat_sawtooth(double val)
+{
+ if (val >= 0.0)
+ return fmod(val, 1.0);
+ else
+ return 1.0 - fmod(-val, 1.0);
+}
+
+static double
+gradient_repeat_triangular(double val)
+{
+ int ival;
+
+ if (val < 0.0)
+ val = -val;
+
+ ival = (int) val;
+
+ if (ival & 1)
+ return 1.0 - fmod(val, 1.0);
+ else
+ return fmod(val, 1.0);
+}
/*****/
static void
@@ -956,7 +1014,7 @@
BlendMode blend_mode,
GradientType gradient_type,
double offset,
- int repeat,
+ RepeatMode repeat,
int sx,
int sy,
int ex,
@@ -973,6 +1031,7 @@
double factor;
unsigned char *data;
void * pr;
+ RepeatFunc repeat_func;
/* Get foreground and background colors */
palette_get_foreground(&rf, &gf, &bf);
@@ -1058,6 +1117,26 @@
break;
} /* switch */
+ /* Set repeat function */
+
+ switch (repeat)
+ {
+ case REPEAT_NONE:
+ repeat_func = gradient_repeat_none;
+ break;
+
+ case REPEAT_SAWTOOTH:
+ repeat_func = gradient_repeat_sawtooth;
+ break;
+
+ case REPEAT_TRIANGULAR:
+ repeat_func = gradient_repeat_triangular;
+ break;
+
+ default:
+ fatal_error("gradient_fill_region(): unknown repeat mode %d", (int) repeat);
+ break;
+ } /* switch */
/* Cycle through the affected tiles and fill */
for (pr = pixel_regions_register (1, PR); pr != NULL; pr = pixel_regions_process (pr))
@@ -1116,10 +1195,7 @@
/* Adjust for repeat */
- if (repeat)
- factor = fmod(factor, 1.0);
- else
- factor = BOUNDS(factor, 0.0, 1.0);
+ factor = (*repeat_func)(factor);
/* Blend the colors */
@@ -1250,7 +1326,7 @@
},
{ PDB_INT32,
"repeat",
- "Repeat the gradient indefinitely along the direction vector"
+ "Repeat mode: { NONE (0), REPEAT_SAWTOOTH (1), REPEAT_TRIANGULAR (2) }"
},
{ PDB_FLOAT,
"x1",
@@ -1303,7 +1379,7 @@
GradientType gradient_type;
double opacity;
double offset;
- int repeat;
+ RepeatMode repeat;
double x1, y1;
double x2, y2;
int int_value;
@@ -1387,7 +1463,13 @@
if (success)
{
int_value = args[7].value.pdb_int;
- repeat = (int_value ? TRUE : FALSE);
+ switch (int_value)
+ {
+ case 0: repeat = REPEAT_NONE; break;
+ case 1: repeat = REPEAT_SAWTOOTH; break;
+ case 2: repeat = REPEAT_TRIANGULAR; break;
+ default: success = FALSE;
+ }
}
/* x1, y1, x2, y2 */
if (success)
--- plug-ins/script-fu/script-fu.c~ Sun Apr 27 00:31:00 1997
+++ plug-ins/script-fu/script-fu.c Mon Apr 28 12:58:19 1997
@@ -493,6 +493,10 @@
setvar (cintern ("SHAPEBURST-SPHERICAL"), flocons (7), NIL);
setvar (cintern ("SHAPEBURST-DIMPLED"), flocons (8), NIL);
+ setvar (cintern ("REPEAT-NONE"), flocons(0), NIL);
+ setvar (cintern ("REPEAT-SAWTOOTH"), flocons(1), NIL);
+ setvar (cintern ("REPEAT-TRIANGULAR"), flocons(2), NIL);
+
setvar (cintern ("FG-BUCKET-FILL"), flocons (0), NIL);
setvar (cintern ("BG-BUCKET-FILL"), flocons (1), NIL);
setvar (cintern ("PATTERN-BUCKET-FILL"), flocons (2), NIL);
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