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comparison src/graph_engine_openvg.c @ 606:e21eb54c7d9c openvg

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Implement radial gradient paint. - Refactory linear gradient creation function to share code with radial gradient creation function.
author Thinker K.F. Li <thinker@branda.to>
date Sun, 04 Jul 2010 16:31:39 +0800
parents a8fa4c550fe5
children 51dc49fd34a8
comparison
equal deleted inserted replaced
605:a8fa4c550fe5 606:e21eb54c7d9c
11 #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) | \
12 (((int)(0xf * g) & 0xf) << 16) | \ 12 (((int)(0xf * g) & 0xf) << 16) | \
13 (((int)(0xf * b) & 0xf) << 16) | \ 13 (((int)(0xf * b) & 0xf) << 16) | \
14 ((int)(0xf * a) & 0xf)) 14 ((int)(0xf * a) & 0xf))
15 15
16 mbe_pattern_t * 16 static mbe_pattern_t *
17 mbe_pattern_create_linear(co_aix x0, co_aix y0, 17 _mbe_pattern_create_gradient(VGfloat *gradient, int grad_len,
18 co_aix x1, co_aix y1, 18 int grad_type,
19 grad_stop_t *stops, int stop_cnt) { 19 grad_stop_t *stops, int stop_cnt) {
20 VGPaint paint; 20 VGPaint paint;
21 mbe_pattern_t *pattern; 21 mbe_pattern_t *pattern;
22 VGfloat gradient[] = {x0, y0, x1, y1};
23 static VGfloat *ov_stops = 0; 22 static VGfloat *ov_stops = 0;
24 static int max_stop_cnt = 0; 23 static int max_stop_cnt = 0;
25 VGfloat *cur_ov_stop; 24 VGfloat *cur_ov_stop;
26 grad_stop_t *cur_stop; 25 grad_stop_t *cur_stop;
27 int i; 26 int i;
49 } 48 }
50 49
51 paint = vgCreatePaint(); 50 paint = vgCreatePaint();
52 if(paint == VG_INVALID_HANDLE) 51 if(paint == VG_INVALID_HANDLE)
53 return NULL; 52 return NULL;
54 vgSetParameteri(paint, VG_PAINT_TYPE, VG_PAINT_TYPE_LINEAR_GRADIENT); 53 vgSetParameteri(paint, VG_PAINT_TYPE, grad_type);
55 vgSetParameterfv(paint, VG_PAINT_LINEAR_GRADIENT, 4, gradient); 54 vgSetParameterfv(paint, VG_PAINT_RADIAL_GRADIENT, grad_len, gradient);
56 vgSetParameterfv(paint, VG_PAINT_COLOR_RAMP_STOPS, 5 * stop_cnt, ov_stops); 55 vgSetParameterfv(paint, VG_PAINT_COLOR_RAMP_STOPS, 5 * stop_cnt, ov_stops);
57 56
58 pattern = O_ALLOC(mbe_pattern_t); 57 pattern = O_ALLOC(mbe_pattern_t);
59 if(pattern == NULL) { 58 if(pattern == NULL) {
60 vgPaintDestroy(paint); 59 vgPaintDestroy(paint);
62 } 61 }
63 62
64 pattern->paint = paint; 63 pattern->paint = paint;
65 pattern->asso_img = NULL; 64 pattern->asso_img = NULL;
66 65
66 return pattern;
67 }
68
69 /*
70 * \note OpenVG does not support start circle, it supports only focal
71 * point. It means radius0 is not working.
72 */
73 mbe_pattern_t *
74 mbe_pattern_create_radial(co_aix cx0, co_aix cy0,
75 co_aix radius0,
76 co_aix cx1, co_aix cy1,
77 co_aix radius1, grad_stop_t *stops,
78 int stop_cnt) {
79 mbe_pattern_t *pattern;
80 VGfloat gradient[] = {cx0, cy0, cx1, cy1, radius1};
81
82 pattern = _mbe_pattern_create_gradient(gradient, 5,
83 VG_PAINT_TYPE_RADIAL_GRADIENT,
84 stops, stop_cnt);
85 return pattern;
86 }
87
88 mbe_pattern_t *
89 mbe_pattern_create_linear(co_aix x0, co_aix y0,
90 co_aix x1, co_aix y1,
91 grad_stop_t *stops, int stop_cnt) {
92 mbe_pattern_t *pattern;
93 VGfloat gradient[] = {x0, y0, x1, y1};
94
95 pattern = _mbe_pattern_create_gradient(gradient, 4,
96 VG_PAINT_TYPE_LINEAR_GRADIENT,
97 stops, stop_cnt);
67 return pattern; 98 return pattern;
68 } 99 }
69 100
70 void 101 void
71 mbe_set_source_rgba(mbe_t *canvas, co_comp_t r, co_comp_t g, 102 mbe_set_source_rgba(mbe_t *canvas, co_comp_t r, co_comp_t g,