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Viewing changes to src/egl/openvg/trivial/gradorigin.c

  • Committer: Bazaar Package Importer
  • Author(s): Christopher James Halse Rogers
  • Date: 2010-09-27 16:18:27 UTC
  • Revision ID: james.westby@ubuntu.com-20100927161827-1yfgolc1oy9sjhi8
Tags: upstream-8.0.1
Import upstream version 8.0.1

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src/egl/openvg/trivial/gradorigin.c
 
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#include "eglcommon.h"
 
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#include <VG/openvg.h>
 
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#include <stdio.h>
 
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#include <string.h>
 
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static const VGfloat white_color[4] = {1.0, 1.0, 1.0, 1.0};
 
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static VGPath path;
 
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static VGPaint fill;
 
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VGColorRampSpreadMode spread = VG_COLOR_RAMP_SPREAD_PAD;
 
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static void
 
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init(void)
 
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{
 
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   VGubyte commands[5] =  {VG_MOVE_TO_ABS, VG_LINE_TO_ABS, VG_LINE_TO_ABS, VG_LINE_TO_ABS, VG_CLOSE_PATH};
 
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   VGfloat coords[8] =    {0.0f,0.0f, 32.0f,0.0f, 32.0f,32.0f, 0.0f,32.0f };
 
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   VGfloat rampStop[20] = {-0.5f,  1.0f, 1.0f, 1.0f, 1.0f,
 
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                           0.25f, 1.0f, 0.0f, 0.0f, 1.0f,
 
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                           0.75f, 0.0f, 0.0f, 1.0f, 1.0f,
 
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                           1.5f,  0.0f, 0.0f, 0.0f, 0.0f};
 
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   VGfloat defaultColor[] = {1.0f, 1.0f, 1.0f, 1.0f};
 
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   VGfloat linearGradient[4] = {0.0f, 0.0f, 0.0f, 32.0f};
 
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   path = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F,
 
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                       1.0f, 0.0f, 0, 0, VG_PATH_CAPABILITY_ALL);
 
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   if (path == VG_INVALID_HANDLE)
 
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      return;
 
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   fill = vgCreatePaint();
 
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   if (fill == VG_INVALID_HANDLE) {
 
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      vgDestroyPath(path);
 
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      return;
 
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   }
 
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   vgSetfv(VG_CLEAR_COLOR, 4, defaultColor);
 
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   vgSeti(VG_RENDERING_QUALITY, VG_RENDERING_QUALITY_NONANTIALIASED);
 
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   vgAppendPathData(path, 5, commands, coords);
 
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   vgSetPaint(fill, VG_FILL_PATH);
 
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   vgSetParameteri(fill, VG_PAINT_TYPE, VG_PAINT_TYPE_LINEAR_GRADIENT);
 
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   vgSetParameteri(fill, VG_PAINT_COLOR_RAMP_SPREAD_MODE,
 
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                   VG_COLOR_RAMP_SPREAD_REPEAT);
 
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   vgSetParameterfv(fill, VG_PAINT_LINEAR_GRADIENT, 4, linearGradient);
 
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   vgSetParameterfv(fill, VG_PAINT_COLOR_RAMP_STOPS, 20, rampStop);
 
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}
 
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/* new window size or exposure */
 
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static void
 
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reshape(int w, int h)
 
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{
 
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   vgLoadIdentity();
 
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}
 
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static void
 
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draw(void)
 
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{
 
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   vgClear(0, 0, window_width(), window_height());
 
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   vgDrawPath(path, VG_FILL_PATH);
 
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   vgFlush();
 
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}
 
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int main(int argc, char **argv)
 
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{
 
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   if (argc > 1) {
 
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      const char *arg = argv[1];
 
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      if (!strcmp("-pad", arg))
 
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         spread = VG_COLOR_RAMP_SPREAD_PAD;
 
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      else if (!strcmp("-repeat", arg))
 
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         spread = VG_COLOR_RAMP_SPREAD_REPEAT;
 
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      else if (!strcmp("-reflect", arg))
 
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         spread = VG_COLOR_RAMP_SPREAD_REFLECT;
 
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   }
 
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   switch(spread) {
 
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   case VG_COLOR_RAMP_SPREAD_PAD:
 
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      printf("Using spread mode: pad\n");
 
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      break;
 
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   case VG_COLOR_RAMP_SPREAD_REPEAT:
 
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      printf("Using spread mode: repeat\n");
 
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      break;
 
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   case VG_COLOR_RAMP_SPREAD_REFLECT:
 
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      printf("Using spread mode: reflect\n");
 
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   }
 
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   set_window_size(200, 200);
 
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   return run(argc, argv, init, reshape,
 
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              draw, 0);
 
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}