src/gallium/targets/osmesa/test-render.c

   1 #include <stdint.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include "GL/osmesa.h"
   5
   6 static void
   7 render(void)
   8 {
   9    glClearColor(0, 1, 0, 0);
  10    glClear(GL_COLOR_BUFFER_BIT);
  11 }
  12
  13 int
  14 main(int argc, char **argv)
  15 {
  16    OSMesaContext ctx;
  17    uint32_t pixel;
  18    uint32_t green = 0xff << 8;
  19    int w = 1, h = 1;
  20
  21    ctx = OSMesaCreateContext(GL_RGBA, NULL);
  22    if (!ctx) {
  23       fprintf(stderr, "Context create failed\n");
  24       return 1;
  25    }
  26
  27    if (!OSMesaMakeCurrent(ctx, &pixel, GL_UNSIGNED_BYTE, w, h )) {
  28       fprintf(stderr, "MakeCurrent failed\n");
  29       return 1;
  30    }
  31
  32    render();
  33    glFinish();
  34
  35    if (pixel != green) {
  36       fprintf(stderr, "Expected: 0x%08x\n", green);
  37       fprintf(stderr, "Probed: 0x%08x\n", pixel);
  38       return 1;
  39    }
  40
  41    OSMesaDestroyContext(ctx);
  42
  43    return 0;
  44 }