1#include "eglcommon.h"
2
3#include <VG/openvg.h>
4
5#include <stdio.h>
6#include <string.h>
7
8static const VGfloat white_color[4] = {1.0, 1.0, 1.0, 1.0};
9
10static VGPath path;
11static VGPaint fill;
12
13VGColorRampSpreadMode spread = VG_COLOR_RAMP_SPREAD_PAD;
14
15static void
16init(void)
17{
18   VGubyte commands[5] =  {VG_MOVE_TO_ABS, VG_LINE_TO_ABS, VG_LINE_TO_ABS, VG_LINE_TO_ABS, VG_CLOSE_PATH};
19   VGfloat coords[8] =    {0.0f,0.0f, 32.0f,0.0f, 32.0f,32.0f, 0.0f,32.0f };
20
21   VGfloat rampStop[20] = {-0.5f,  1.0f, 1.0f, 1.0f, 1.0f,
22                           0.25f, 1.0f, 0.0f, 0.0f, 1.0f,
23                           0.75f, 0.0f, 0.0f, 1.0f, 1.0f,
24                           1.5f,  0.0f, 0.0f, 0.0f, 0.0f};
25
26   VGfloat defaultColor[] = {1.0f, 1.0f, 1.0f, 1.0f};
27   VGfloat linearGradient[4] = {0.0f, 0.0f, 0.0f, 32.0f};
28
29   path = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F,
30                       1.0f, 0.0f, 0, 0, VG_PATH_CAPABILITY_ALL);
31   if (path == VG_INVALID_HANDLE)
32      return;
33
34   fill = vgCreatePaint();
35   if (fill == VG_INVALID_HANDLE) {
36      vgDestroyPath(path);
37      return;
38   }
39
40   vgSetfv(VG_CLEAR_COLOR, 4, defaultColor);
41   vgSeti(VG_RENDERING_QUALITY, VG_RENDERING_QUALITY_NONANTIALIASED);
42
43   vgAppendPathData(path, 5, commands, coords);
44
45   vgSetPaint(fill, VG_FILL_PATH);
46   vgSetParameteri(fill, VG_PAINT_TYPE, VG_PAINT_TYPE_LINEAR_GRADIENT);
47   vgSetParameteri(fill, VG_PAINT_COLOR_RAMP_SPREAD_MODE,
48                   VG_COLOR_RAMP_SPREAD_REPEAT);
49   vgSetParameterfv(fill, VG_PAINT_LINEAR_GRADIENT, 4, linearGradient);
50   vgSetParameterfv(fill, VG_PAINT_COLOR_RAMP_STOPS, 20, rampStop);
51}
52
53/* new window size or exposure */
54static void
55reshape(int w, int h)
56{
57   vgLoadIdentity();
58}
59
60static void
61draw(void)
62{
63   vgClear(0, 0, window_width(), window_height());
64
65   vgDrawPath(path, VG_FILL_PATH);
66
67   vgFlush();
68}
69
70
71int main(int argc, char **argv)
72{
73   if (argc > 1) {
74      const char *arg = argv[1];
75      if (!strcmp("-pad", arg))
76         spread = VG_COLOR_RAMP_SPREAD_PAD;
77      else if (!strcmp("-repeat", arg))
78         spread = VG_COLOR_RAMP_SPREAD_REPEAT;
79      else if (!strcmp("-reflect", arg))
80         spread = VG_COLOR_RAMP_SPREAD_REFLECT;
81   }
82
83   switch(spread) {
84   case VG_COLOR_RAMP_SPREAD_PAD:
85      printf("Using spread mode: pad\n");
86      break;
87   case VG_COLOR_RAMP_SPREAD_REPEAT:
88      printf("Using spread mode: repeat\n");
89      break;
90   case VG_COLOR_RAMP_SPREAD_REFLECT:
91      printf("Using spread mode: reflect\n");
92   }
93
94   set_window_size(200, 200);
95
96   return run(argc, argv, init, reshape,
97              draw, 0);
98}
99