MadButterfly: src/paint.c annotate

annotate src/paint.c @ 55:01ed2bc37eed

Radial gradient paint

author	Thinker K.F. Li <thinker@branda.to>
date	Sun, 10 Aug 2008 16:44:21 +0800
parents	59a295651480
children	e444a8c01735

rev	line source
18 0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	1 #include <stdio.h>
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	2 #include <stdlib.h>
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	3 #include <cairo.h>
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	4 #include "paint.h"
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	5
55 01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	6 #define ASSERT(x)
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	7
23 56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	8 /*! \brief Solid color paint.
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	9 */
18 0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	10 typedef struct _paint_color {
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	11 paint_t paint;
21 83d24300a992 opacity (alpha) channel Thinker K.F. Li <thinker@branda.to> parents: 19 diff changeset	12 co_comp_t r, g, b, a;
18 0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	13 redraw_man_t *rdman;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	14 } paint_color_t;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	15
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	16
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	17 static void paint_color_prepare(paint_t paint, cairo_t cr) {
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	18 paint_color_t color = (paint_color_t )paint;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	19
21 83d24300a992 opacity (alpha) channel Thinker K.F. Li <thinker@branda.to> parents: 19 diff changeset	20 cairo_set_source_rgba(cr, color->r, color->g, color->b, color->a);
18 0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	21 }
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	22
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	23 static void paint_color_free(paint_t *paint) {
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	24 paint_color_t color = (paint_color_t )paint;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	25
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	26 shnode_list_free(color->rdman, paint->members);
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	27 free(paint);
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	28 }
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	29
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	30 paint_t paint_color_new(redraw_man_t rdman,
21 83d24300a992 opacity (alpha) channel Thinker K.F. Li <thinker@branda.to> parents: 19 diff changeset	31 co_comp_t r, co_comp_t g,
83d24300a992 opacity (alpha) channel Thinker K.F. Li <thinker@branda.to> parents: 19 diff changeset	32 co_comp_t b, co_comp_t a) {
18 0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	33 paint_color_t *color;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	34
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	35 color = (paint_color_t *)malloc(sizeof(paint_color_t));
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	36 if(color == NULL)
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	37 return NULL;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	38 color->rdman = rdman;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	39 color->r = r;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	40 color->g = g;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	41 color->b = b;
21 83d24300a992 opacity (alpha) channel Thinker K.F. Li <thinker@branda.to> parents: 19 diff changeset	42 color->a = a;
19 cf6d65398619 More animation demo Thinker K.F. Li <thinker@branda.to> parents: 18 diff changeset	43 paint_init(&color->paint, paint_color_prepare, paint_color_free);
18 0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	44 return (paint_t *)color;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	45 }
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	46
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	47 void paint_color_set(paint_t *paint,
21 83d24300a992 opacity (alpha) channel Thinker K.F. Li <thinker@branda.to> parents: 19 diff changeset	48 co_comp_t r, co_comp_t g,
83d24300a992 opacity (alpha) channel Thinker K.F. Li <thinker@branda.to> parents: 19 diff changeset	49 co_comp_t b, co_comp_t a) {
18 0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	50 paint_color_t color = (paint_color_t )paint;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	51
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	52 color->r = r;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	53 color->g = g;
0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	54 color->b = b;
21 83d24300a992 opacity (alpha) channel Thinker K.F. Li <thinker@branda.to> parents: 19 diff changeset	55 color->a = a;
18 0f3baa488a62 Support solid color paint for fill. Thinker K.F. Li <thinker@branda.to> parents: diff changeset	56 }
23 56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	57
52 59a295651480 Add action mb_chgcolor_t to change color of paints. Thinker K.F. Li <thinker@branda.to> parents: 23 diff changeset	58 void paint_color_get(paint_t *paint,
59a295651480 Add action mb_chgcolor_t to change color of paints. Thinker K.F. Li <thinker@branda.to> parents: 23 diff changeset	59 co_comp_t r, co_comp_t g,
59a295651480 Add action mb_chgcolor_t to change color of paints. Thinker K.F. Li <thinker@branda.to> parents: 23 diff changeset	60 co_comp_t b, co_comp_t a) {
59a295651480 Add action mb_chgcolor_t to change color of paints. Thinker K.F. Li <thinker@branda.to> parents: 23 diff changeset	61 paint_color_t color = (paint_color_t )paint;
59a295651480 Add action mb_chgcolor_t to change color of paints. Thinker K.F. Li <thinker@branda.to> parents: 23 diff changeset	62
59a295651480 Add action mb_chgcolor_t to change color of paints. Thinker K.F. Li <thinker@branda.to> parents: 23 diff changeset	63 *r = color->r;
59a295651480 Add action mb_chgcolor_t to change color of paints. Thinker K.F. Li <thinker@branda.to> parents: 23 diff changeset	64 *g = color->g;
59a295651480 Add action mb_chgcolor_t to change color of paints. Thinker K.F. Li <thinker@branda.to> parents: 23 diff changeset	65 *b = color->b;
59a295651480 Add action mb_chgcolor_t to change color of paints. Thinker K.F. Li <thinker@branda.to> parents: 23 diff changeset	66 *a = color->a;
59a295651480 Add action mb_chgcolor_t to change color of paints. Thinker K.F. Li <thinker@branda.to> parents: 23 diff changeset	67 }
59a295651480 Add action mb_chgcolor_t to change color of paints. Thinker K.F. Li <thinker@branda.to> parents: 23 diff changeset	68
23 56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	69 /*! \brief Linear gradient.
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	70 */
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	71 typedef struct _paint_linear {
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	72 paint_t paint;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	73 co_aix x1, y1;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	74 co_aix x2, y2;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	75 int n_stops;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	76 grad_stop_t *stops;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	77 int flags;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	78 cairo_pattern_t *ptn;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	79 } paint_linear_t;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	80
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	81 #define LIF_DIRTY 0x1
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	82
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	83 static void paint_linear_prepare(paint_t paint, cairo_t cr) {
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	84 paint_linear_t linear = (paint_linear_t )paint;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	85 cairo_pattern_t *ptn;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	86 grad_stop_t *stop;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	87 int i;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	88
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	89 ptn = linear->ptn;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	90 if(linear->flags & LIF_DIRTY) {
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	91 if(ptn)
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	92 cairo_pattern_destroy(ptn);
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	93 linear->flags &= ~LIF_DIRTY;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	94 ptn = cairo_pattern_create_linear(linear->x1, linear->y1,
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	95 linear->x2, linear->y2);
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	96 for(i = 0; i < linear->n_stops; i++) {
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	97 stop = &linear->stops[i];
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	98 cairo_pattern_add_color_stop_rgba(ptn, stop->offset,
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	99 stop->r, stop->g, stop->b,
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	100 stop->a);
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	101 }
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	102 linear->ptn = ptn;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	103 }
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	104
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	105 cairo_set_source(cr, ptn);
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	106 }
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	107
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	108 static void paint_linear_free(paint_t *paint) {
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	109 paint_linear_t linear = (paint_linear_t )paint;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	110
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	111 if(linear->ptn)
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	112 cairo_pattern_destroy(linear->ptn);
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	113 free(paint);
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	114 }
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	115
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	116 paint_t paint_linear_new(redraw_man_t rdman,
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	117 co_aix x1, co_aix y1, co_aix x2, co_aix y2) {
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	118 paint_linear_t *linear;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	119
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	120 linear = (paint_linear_t *)malloc(sizeof(paint_linear_t));
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	121 if(linear == NULL)
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	122 return NULL;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	123
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	124 paint_init(&linear->paint, paint_linear_prepare, paint_linear_free);
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	125
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	126 linear->x1 = x1;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	127 linear->y1 = y1;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	128 linear->x2 = x2;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	129 linear->y2 = y2;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	130 linear->n_stops = 0;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	131 linear->stops = NULL;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	132 linear->flags = LIF_DIRTY;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	133 linear->ptn = NULL;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	134
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	135 return (paint_t *)linear;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	136 }
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	137
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	138 grad_stop_t paint_linear_stops(paint_t paint,
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	139 int n_stops,
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	140 grad_stop_t *stops) {
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	141 paint_linear_t linear = (paint_linear_t )paint;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	142 grad_stop_t *old_stops;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	143
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	144 old_stops = linear->stops;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	145 linear->n_stops = n_stops;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	146 linear->stops = stops;
55 01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	147 linear->flags \|= LIF_DIRTY;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	148
23 56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	149 return old_stops;
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	150 }
56f592f56ff7 Fix bug and add linear gradient paint. Thinker K.F. Li <thinker@branda.to> parents: 21 diff changeset	151
55 01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	152 /*! \brief Radial gradient.
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	153 *
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	154 * NOTE: The only supported gradient unit is userSpaceOnUse.
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	155 */
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	156 typedef struct _paint_radial {
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	157 paint_t paint;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	158 co_aix cx, cy;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	159 co_aix r;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	160 int n_stops;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	161 grad_stop_t *stops;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	162 int flags;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	163 cairo_pattern_t *ptn;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	164 } paint_radial_t;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	165
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	166 #define RDF_DIRTY 0x1
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	167
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	168 static void paint_radial_prepare(paint_t paint, cairo_t cr) {
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	169 paint_radial_t radial = (paint_radial_t )paint;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	170 cairo_pattern_t *ptn;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	171 grad_stop_t *stop;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	172 int i;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	173
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	174 if(radial->flags & RDF_DIRTY) {
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	175 ptn = cairo_pattern_create_radial(radial->cx, radial->cy, 0,
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	176 radial->cx, radial->cy,
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	177 radial->r);
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	178 ASSERT(ptn != NULL);
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	179 stop = radial->stops;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	180 for(i = 0; i < radial->n_stops; i++, stop++) {
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	181 cairo_pattern_add_color_stop_rgba(ptn, stop->offset,
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	182 stop->r, stop->g,
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	183 stop->b, stop->a);
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	184 }
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	185 cairo_pattern_destroy(radial->ptn);
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	186 radial->ptn = ptn;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	187 }
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	188 cairo_set_source(cr, radial->ptn);
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	189 }
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	190
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	191 static void paint_radial_free(paint_t *paint) {
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	192 paint_radial_t radial = (paint_radial_t )paint;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	193
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	194 if(radial->ptn)
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	195 cairo_pattern_destroy(radial->ptn);
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	196 free(paint);
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	197 }
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	198
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	199 paint_t paint_radial_new(redraw_man_t rdman,
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	200 co_aix cx, co_aix cy, co_aix r,
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	201 int n_stops, grad_stop_t *stops) {
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	202 paint_radial_t *radial;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	203
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	204 radial = O_ALLOC(paint_radial_t);
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	205 if(radial == NULL)
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	206 return NULL;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	207
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	208 paint_init(&radial->paint, paint_radial_prepare, paint_radial_free);
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	209 radial->cx = cx;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	210 radial->cy = cy;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	211 radial->r = r;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	212 radial->n_stops = n_stops;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	213 radial->stops = stops;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	214 radial->flags = RDF_DIRTY;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	215 radial->ptn = NULL;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	216
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	217 return (paint_t *)radial;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	218 }
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	219
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	220 grad_stop_t paint_radial_stops(paint_t paint,
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	221 int n_stops,
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	222 grad_stop_t *stops) {
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	223 paint_radial_t radial = (paint_radial_t )paint;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	224 grad_stop_t *old_stops;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	225
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	226 old_stops = radial->stops;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	227 radial->n_stops = n_stops;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	228 radial->stops = stops;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	229 radial->flags \|= RDF_DIRTY;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	230
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	231 return old_stops;
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	232 }
01ed2bc37eed Radial gradient paint Thinker K.F. Li <thinker@branda.to> parents: 52 diff changeset	233

Mercurial > MadButterfly

annotate src/paint.c @ 55:01ed2bc37eed