Fixed bug 3569 - GL_UpdateViewport leaves PROJECTION matrix selected

Tom Seddon

GL_ActivateRenderer may call GL_UpdateViewport, which leaves the GL_PROJECTION matrix selected. But after GL_ResetState, the GL_MODELVIEW matrix is selected, suggesting that's the intended default state.

It seems at least like these should be consistent. Presumably GL_UpdateViewport should be doing a glMatrixMode(GL_MODELVIEW) before it finishes.

src/render/opengl/SDL_render_gl.c

@@ -1041,6 +1041,8 @@ GL_UpdateViewport(SDL_Renderer * renderer)
                            0.0, 1.0);
         }
     }
+    data->glMatrixMode(GL_MODELVIEW);
+
     return GL_CheckError("", renderer);
 }