progs/egl/openvg/trivial/star-nonzero.c

   1 #include "eglcommon.h"
   2
   3 #include <VG/openvg.h>
   4
   5 const VGfloat white_color[4] = {1.0, 1.0, 1.0, 1.0};
   6 const VGfloat green_color[4] = {0.0, 1.0, 0.0, 0.8};
   7
   8 VGPath path;
   9 VGPaint fill;
  10
  11
  12 static void
  13 init(void)
  14 {
  15    static const VGubyte cmds[6] = {VG_MOVE_TO_ABS, VG_LINE_TO_ABS, VG_LINE_TO_ABS, VG_LINE_TO_ABS,
  16                                    VG_LINE_TO_ABS, VG_CLOSE_PATH};
  17    static const VGfloat coords[]   = {  0,  200,
  18                                         300,  200,
  19                                         50,   0,
  20                                         150, 300,
  21                                         250,   0};
  22    path = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F, 1, 0, 0, 0,
  23                        VG_PATH_CAPABILITY_APPEND_TO);
  24    vgAppendPathData(path, 6, cmds, coords);
  25
  26    fill = vgCreatePaint();
  27    vgSetParameterfv(fill, VG_PAINT_COLOR, 4, green_color);
  28    vgSetPaint(fill, VG_FILL_PATH);
  29
  30    vgSetfv(VG_CLEAR_COLOR, 4, white_color);
  31    vgSeti(VG_FILL_RULE, VG_NON_ZERO);
  32 }
  33
  34 /* new window size or exposure */
  35 static void
  36 reshape(int w, int h)
  37 {
  38    vgLoadIdentity();
  39 }
  40
  41 static void
  42 draw(void)
  43 {
  44    vgClear(0, 0, window_width(), window_height());
  45    vgDrawPath(path, VG_FILL_PATH | VG_STROKE_PATH);
  46
  47    vgFlush();
  48 }
  49
  50
  51 int main(int argc, char **argv)
  52 {
  53    return run(argc, argv, init, reshape,
  54               draw, 0);
  55 }