add working cubegeom test

1 files changed, 17 insertions, 1 deletions

diff --git a/tests/cubegeom.c b/tests/cubegeom.c
index 529e1355..17d6e909 100644
--- a/tests/cubegeom.c
+++ b/tests/cubegeom.c
@@ -29,6 +29,20 @@ REDISTRIBUTION OF THIS SOFTWARE.
 #include <string.h>
 #include <assert.h>
 
+void verify() {
+  int width = 640, height = 480;
+  unsigned char *data = (unsigned char*)malloc(width*height*4);
+  glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, data);
+  int sum = 0;
+  for (int x = 0; x < width*height*4; x++) {
+    if (x % 4 != 3) sum += x * data[x];
+  }
+#if EMSCRIPTEN
+  int result = sum;
+  REPORT_RESULT();
+#endif
+}
+
 int main(int argc, char *argv[])
 {
     SDL_Surface *screen;
@@ -267,7 +281,9 @@ int main(int argc, char *argv[])
     // END
 
     SDL_GL_SwapBuffers();
-    
+
+    verify();
+   
 #if !EMSCRIPTEN
     SDL_Delay(3000);
 #endif