diff -rupN SDL.broken/src/render/opengles2/SDL_render_gles2.c SDL/src/render/opengles2/SDL_render_gles2.c
--- SDL.broken/src/render/opengles2/SDL_render_gles2.c	2015-09-12 21:58:56.000000000 +1000
+++ SDL/src/render/opengles2/SDL_render_gles2.c	2015-09-12 22:00:45.000000000 +1000
@@ -418,7 +418,7 @@ GLES2_UpdateClipRect(SDL_Renderer * rend
             int w, h;
 
             SDL_GetRendererOutputSize(renderer, &w, &h);
-            data->glScissor(renderer->viewport.x + rect->x, (h - renderer->viewport.y - renderer->viewport.h) + rect->y, rect->w, rect->h);
+            data->glScissor(renderer->viewport.x + rect->x, h - (renderer->viewport.y + rect->y + rect->h), rect->w, rect->h);
         }
     } else {
         data->glDisable(GL_SCISSOR_TEST);