- add post processing support to the software renderer and softpoly

src/gl/system/gl_framebuffer.h

@@ -44,7 +44,6 @@ public:
     IUniformBuffer *CreateUniformBuffer(size_t size, bool staticuse = false) override;
 	IShaderProgram *CreateShaderProgram() override;
 
-
 	// Retrieves a buffer containing image data for a screenshot.
 	// Hint: Pitch can be negative for upside-down images, in which case buffer
 	// points to the last row in the buffer, which will be the first row output.
@@ -60,6 +59,7 @@ public:
 	void SetVSync(bool vsync);
 
 	void Draw2D() override;
+	void PostProcessScene(int fixedcm, const std::function<void()> &afterBloomDrawEndScene2D) override;
 
 	bool HWGammaActive = false;			// Are we using hardware or software gamma?
 	std::shared_ptr<FGLDebug> mDebug;	// Debug API