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comparison src/graph_engine_openvg.c @ 604:38514a7c6b26 openvg

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Linear gradient for OpenVG
author Thinker K.F. Li <thinker@branda.to>
date Sun, 04 Jul 2010 15:36:40 +0800
parents 20b396c09c23
children a8fa4c550fe5
comparison
equal deleted inserted replaced
603:39d27911c3ae 604:38514a7c6b26
1 #include "mb_graph_engine_openvg.h" 1 #include "mb_graph_engine_openvg.h"
2 #include "mb_tools.h"
2 3
3 EGLNativeDisplayType _ge_openvg_disp_id = EGL_DEFAULT_DISPLAY; 4 EGLNativeDisplayType _ge_openvg_disp_id = EGL_DEFAULT_DISPLAY;
4 mbe_t *_ge_openvg_current_canvas = NULL; 5 mbe_t *_ge_openvg_current_canvas = NULL;
5 6
6 #ifndef ASSERT 7 #ifndef ASSERT
9 10
10 #define MB_2_VG_COLOR(r, g, b, a) ((((int)(0xf * r) & 0xf) << 24) | \ 11 #define MB_2_VG_COLOR(r, g, b, a) ((((int)(0xf * r) & 0xf) << 24) | \
11 (((int)(0xf * g) & 0xf) << 16) | \ 12 (((int)(0xf * g) & 0xf) << 16) | \
12 (((int)(0xf * b) & 0xf) << 16) | \ 13 (((int)(0xf * b) & 0xf) << 16) | \
13 ((int)(0xf * a) & 0xf)) 14 ((int)(0xf * a) & 0xf))
15
16 mbe_pattern_t *
17 mbe_pattern_create_linear(co_aix x0, co_aix y0,
18 co_aix x1, co_aix y1,
19 grad_stop_t *stops, int stop_cnt) {
20 VGPaint paint;
21 mbe_pattern_t *pattern;
22 VGfloat gradient[] = {x0, y0, x1, y1};
23 static VGfloat *ov_stops = 0;
24 static int max_stop_cnt = 0;
25 VGfloat *cur_ov_stop;
26 grad_stop_t *cur_stop;
27 int i;
28
29 /* Make sure there is enough space */
30 if(max_stop_cnt < stop_cnt) {
31 max_stop_cnt = (stop_cnt + 0xf) & ~0xf;
32 cur_ov_stop = (VGfloat *)realloc(stops,
33 max_stop_cnt * sizeof(VGfloat) * 5);
34 if(cur_ov_stop == NULL) {
35 max_stop_cnt = 0;
36 return NULL;
37 }
38 ov_stops = cur_ov_stop;
39 }
40 cur_ov_stop = ov_stops;
41
42 cur_stop = stops;
43 for(i = 0; i < stop_cnt; i++) {
44 *cur_ov_stop++ = cur_stop->offset;
45 *cur_ov_stop++ = cur_stop->r;
46 *cur_ov_stop++ = cur_stop->g;
47 *cur_ov_stop++ = cur_stop->b;
48 *cur_ov_stop++ = cur_stop->a;
49 }
50
51 paint = vgCreatePaint();
52 if(paint == VG_INVALID_HANDLE)
53 return NULL;
54 vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_LINEAR_GRADIENT);
55 vgSetParameterfv(paint, VG_PAINT_LINEAR_GRADIENT, 4, gradient);
56 vgSetParameterfv(paint, VG_PAINT_COLOR_RAMP_STOPS, 5 * stop_cnt, ov_stops);
57
58 pattern = O_ALLOC(mbe_pattern_t);
59 if(pattern == NULL) {
60 vgPaintDestroy(paint);
61 return NULL;
62 }
63
64 pattern->paint = paint;
65 pattern->asso_img = NULL;
66
67 return pattern;
68 }
14 69
15 void 70 void
16 mbe_set_source_rgba(mbe_t *canvas, co_comp_t r, co_comp_t g, 71 mbe_set_source_rgba(mbe_t *canvas, co_comp_t r, co_comp_t g,
17 co_comp_t b, co_comp_t a) { 72 co_comp_t b, co_comp_t a) {
18 VGPaint paint; 73 VGPaint paint;
42 97
43 _MK_CURRENT_CTX(canvas); 98 _MK_CURRENT_CTX(canvas);
44 99
45 if(n_areas > n_scissors) { 100 if(n_areas > n_scissors) {
46 if(scissors) free(scissors); 101 if(scissors) free(scissors);
47 n_scissors = (n_areas + 0xf) & 0xf; 102 n_scissors = (n_areas + 0xf) & ~0xf;
48 scissors = (VGint *)malloc(sizeof(VGint) * n_scissors * 4); 103 scissors = (VGint *)malloc(sizeof(VGint) * n_scissors * 4);
49 ASSERT(scissors != NULL); 104 ASSERT(scissors != NULL);
50 } 105 }
51 106
52 coord = scissors; 107 coord = scissors;