8
static const VGfloat white_color[4] = {1.0, 1.0, 1.0, 1.0};
14
VGfloat centeredGradient[5] = {200.0f, 200.0f, 200.0f, 200.0f, 100};
15
VGfloat noncenteredGradient[5] = {200.0f, 200.0f, 250.0f, 250.0f, 100};
16
VGfloat *radialGradient = centeredGradient;
18
VGColorRampSpreadMode spread = VG_COLOR_RAMP_SPREAD_PAD;
23
static const VGubyte sqrCmds[5] = {VG_MOVE_TO_ABS, VG_HLINE_TO_ABS, VG_VLINE_TO_ABS, VG_HLINE_TO_ABS, VG_CLOSE_PATH};
24
static const VGfloat sqrCoords[5] = {0.0f, 0.0f, 400.0f, 400.0f, 0.0f};
26
VGfloat rampStop[] = {0.00f, 1.0f, 1.0f, 1.0f, 1.0f,
27
0.33f, 1.0f, 0.0f, 0.0f, 1.0f,
28
0.66f, 0.0f, 1.0f, 0.0f, 1.0f,
29
1.00f, 0.0f, 0.0f, 1.0f, 1.0f};
31
path = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F, 1, 0, 0, 0,
32
VG_PATH_CAPABILITY_APPEND_TO);
33
vgAppendPathData(path, 5, sqrCmds, sqrCoords);
35
fill = vgCreatePaint();
36
vgSetPaint(fill, VG_FILL_PATH);
38
vgSetParameteri(fill, VG_PAINT_TYPE, VG_PAINT_TYPE_RADIAL_GRADIENT);
39
vgSetParameteri(fill, VG_PAINT_COLOR_RAMP_SPREAD_MODE, spread);
40
vgSetParameterfv(fill, VG_PAINT_RADIAL_GRADIENT, 5, radialGradient);
41
vgSetParameterfv(fill, VG_PAINT_COLOR_RAMP_STOPS, 20, rampStop);
43
vgSetfv(VG_CLEAR_COLOR, 4, white_color);
46
/* new window size or exposure */
56
vgClear(0, 0, window_width(), window_height());
58
vgDrawPath(path, VG_FILL_PATH);
64
int main(int argc, char **argv)
67
for (i = 1; i < argc; ++i) {
68
const char *arg = argv[i];
69
if (!strcmp("-pad", arg))
70
spread = VG_COLOR_RAMP_SPREAD_PAD;
71
else if (!strcmp("-repeat", arg))
72
spread = VG_COLOR_RAMP_SPREAD_REPEAT;
73
else if (!strcmp("-reflect", arg))
74
spread = VG_COLOR_RAMP_SPREAD_REFLECT;
75
else if (!strcmp("-center", arg)) {
76
printf("Centered radial gradient\n");
77
radialGradient = centeredGradient;
78
} else if (!strcmp("-noncenter", arg)) {
79
printf("Non centered radial gradient\n");
80
radialGradient = noncenteredGradient;
85
case VG_COLOR_RAMP_SPREAD_PAD:
86
printf("Using spread mode: pad\n");
88
case VG_COLOR_RAMP_SPREAD_REPEAT:
89
printf("Using spread mode: repeat\n");
91
case VG_COLOR_RAMP_SPREAD_REFLECT:
92
printf("Using spread mode: reflect\n");
95
set_window_size(400, 400);
97
return run(argc, argv, init, reshape,