WorldRenderer refactor

src/graphics/PostProcessing.cpp

@@ -29,7 +29,7 @@ void PostProcessing::use(GfxContext& context) {
     context.setFramebuffer(fbo.get());
 }
 
-void PostProcessing::render(GfxContext& context, Shader* screenShader) {
+void PostProcessing::render(const GfxContext& context, Shader* screenShader) {
     if (fbo == nullptr) {
         throw std::runtime_error("'use(...)' was never called");
     }

src/graphics/PostProcessing.h

@@ -31,7 +31,7 @@ public:
     /// @param context graphics context
     /// @param screenShader shader used for fullscreen quad
     /// @throws std::runtime_error if use(...) wasn't called before
-    void render(GfxContext& context, Shader* screenShader);
+    void render(const GfxContext& context, Shader* screenShader);
 };
 
 #endif // GRAPHICS_POST_PROCESSING_H_