Mercurial > MadButterfly

annotate src/paint.c @ 23:56f592f56ff7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fix bug and add linear gradient paint. - fix the bug that forget to clear n_dirty_geos in rdman_redraw_all().
author Thinker K.F. Li <thinker@branda.to>
date Sat, 02 Aug 2008 23:10:42 +0800
parents 83d24300a992
children 59a295651480
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
23
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
6 /*! \brief Solid color paint.
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
7 */
18
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
8 typedef struct _paint_color {
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
9 paint_t paint;
21
83d24300a992 opacity (alpha) channel
Thinker K.F. Li <thinker@branda.to>
parents: 19
diff changeset
10 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
11 redraw_man_t *rdman;
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
12 } paint_color_t;
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
13
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
14
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
15 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
16 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
17
21
83d24300a992 opacity (alpha) channel
Thinker K.F. Li <thinker@branda.to>
parents: 19
diff changeset
18 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
19 }
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
20
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
21 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
22 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
23
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
24 shnode_list_free(color->rdman, paint->members);
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
25 free(paint);
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
26 }
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
27
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
28 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
29 co_comp_t r, co_comp_t g,
83d24300a992 opacity (alpha) channel
Thinker K.F. Li <thinker@branda.to>
parents: 19
diff changeset
30 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
31 paint_color_t *color;
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
32
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
33 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
34 if(color == NULL)
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
35 return NULL;
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
36 color->rdman = rdman;
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
37 color->r = r;
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
38 color->g = g;
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
39 color->b = b;
21
83d24300a992 opacity (alpha) channel
Thinker K.F. Li <thinker@branda.to>
parents: 19
diff changeset
40 color->a = a;
19
cf6d65398619 More animation demo
Thinker K.F. Li <thinker@branda.to>
parents: 18
diff changeset
41 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
42 return (paint_t *)color;
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
43 }
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
44
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
45 void paint_color_set(paint_t *paint,
21
83d24300a992 opacity (alpha) channel
Thinker K.F. Li <thinker@branda.to>
parents: 19
diff changeset
46 co_comp_t r, co_comp_t g,
83d24300a992 opacity (alpha) channel
Thinker K.F. Li <thinker@branda.to>
parents: 19
diff changeset
47 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
48 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
49
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
50 color->r = r;
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
51 color->g = g;
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
52 color->b = b;
21
83d24300a992 opacity (alpha) channel
Thinker K.F. Li <thinker@branda.to>
parents: 19
diff changeset
53 color->a = a;
18
0f3baa488a62 Support solid color paint for fill.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
54 }
23
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
55
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
56 /*! \brief Linear gradient.
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
57 */
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
58 typedef struct _paint_linear {
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
59 paint_t paint;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
60 co_aix x1, y1;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
61 co_aix x2, y2;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
62 int n_stops;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
63 grad_stop_t *stops;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
64 int flags;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
65 cairo_pattern_t *ptn;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
66 } paint_linear_t;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
67
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
68 #define LIF_DIRTY 0x1
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
69
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
70 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
71 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
72 cairo_pattern_t *ptn;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
73 grad_stop_t *stop;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
74 int i;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
75
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
76 ptn = linear->ptn;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
77 if(linear->flags & LIF_DIRTY) {
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
78 if(ptn)
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
79 cairo_pattern_destroy(ptn);
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
80 linear->flags &= ~LIF_DIRTY;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
81 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
82 linear->x2, linear->y2);
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
83 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
84 stop = &linear->stops[i];
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
85 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
86 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
87 stop->a);
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 linear->ptn = ptn;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
90 }
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
91
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
92 cairo_set_source(cr, ptn);
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
93 }
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
94
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
95 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
96 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
97
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
98 if(linear->ptn)
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
99 cairo_pattern_destroy(linear->ptn);
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
100 free(paint);
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
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
103 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
104 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
105 paint_linear_t *linear;
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 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
108 if(linear == NULL)
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
109 return NULL;
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 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
112
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
113 linear->x1 = x1;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
114 linear->y1 = y1;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
115 linear->x2 = x2;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
116 linear->y2 = y2;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
117 linear->n_stops = 0;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
118 linear->stops = NULL;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
119 linear->flags = LIF_DIRTY;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
120 linear->ptn = NULL;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
121
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
122 return (paint_t *)linear;
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
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
125 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
126 int n_stops,
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
127 grad_stop_t *stops) {
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
128 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
129 grad_stop_t *old_stops;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
130
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
131 old_stops = linear->stops;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
132 linear->n_stops = n_stops;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
133 linear->stops = stops;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
134 return old_stops;
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
135 }
56f592f56ff7 Fix bug and add linear gradient paint.
Thinker K.F. Li <thinker@branda.to>
parents: 21
diff changeset
136