Implement ValveSoftware#1451

Author: Bitl

src/game/client/viewrender.cpp

@@ -5295,6 +5295,14 @@ void CFreezeFrameView::Draw( void )
 	pRenderContext->PushVertexShaderGPRAllocation( 16 ); //max out pixel shader threads
 #endif
 
+#ifdef BDSBASE
+	if (mat_viewportupscale.GetBool() && mat_viewportscale.GetFloat() < 1.0f)
+	{
+		// mat_viewportscale breaks it without that
+		vgui::surface()->GetScreenSize(width, height);
+	}
+#endif
+
 	// we might only need half of the texture if we're rendering in stereo
 	int nTexX0 = 0, nTexY0 = 0;
 	int nTexX1 = width, nTexY1 = height;