convert test_cubegeom_pre to reftest

tests/cubegeom_pre.c

@@ -29,20 +29,6 @@ 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;
@@ -295,8 +281,7 @@ int main(int argc, char *argv[])
 
     SDL_GL_SwapBuffers();
 
-    verify();
-    
+   
 #if !EMSCRIPTEN
     SDL_Delay(1500);
 #endif

tests/runner.py

@@ -12417,6 +12417,7 @@ elif 'browser' in str(sys.argv):
             var actualUrl = Module.canvas.toDataURL();
             var actualImage = new Image();
             actualImage.onload = function() {
+              //document.body.appendChild(actualImage); // to grab it for creating the test reference
               var actualCanvas = document.createElement('canvas');
               actualCanvas.width = actualImage.width;
               actualCanvas.height = actualImage.height;
@@ -13604,7 +13605,7 @@ Press any key to continue.'''
       self.btest('gl_matrix_identity.c', expected=['-1882984448', '460451840'])
 
     def test_cubegeom_pre(self):
-      self.btest('cubegeom_pre.c', expected=['-1472804742', '-1626058463', '-2046234971'])
+      self.btest('cubegeom_pre.c', reference='cubegeom_pre.png')
 
     def test_cubegeom_pre2(self):
       self.btest('cubegeom_pre2.c', expected=['-1472804742', '-1626058463', '-2046234971'], args=['-s', 'GL_DEBUG=1']) # some coverage for GL_DEBUG not breaking the build