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#include <stdio.h>
#include <stdlib.h>
#include "GL/osmesa.h"
static void
render(void)
{
glClearColor(0, 1, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
}
int
main(int argc, char **argv)
{
OSMesaContext ctx;
uint32_t pixel;
uint32_t green = 0xff << 8;
int w = 1, h = 1;
ctx = OSMesaCreateContext(GL_RGBA, NULL);
if (!ctx) {
fprintf(stderr, "Context create failed\n");
return 1;
}
if (!OSMesaMakeCurrent(ctx, &pixel, GL_UNSIGNED_BYTE, w, h )) {
fprintf(stderr, "MakeCurrent failed\n");
return 1;
}
render();
glFinish();
if (pixel != green) {
fprintf(stderr, "Expected: 0x%08x\n", green);
fprintf(stderr, "Probed: 0x%08x\n", pixel);
return 1;
}
OSMesaDestroyContext(ctx);
return 0;
}
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