- moved code around, got a few more utilities from GZDoom.

source/common/rendering/gl/gl_framebuffer.h

@@ -0,0 +1,77 @@
+#ifndef __GL_FRAMEBUFFER
+#define __GL_FRAMEBUFFER
+
+#include "gl_sysfb.h"
+#include "m_png.h"
+
+#include <memory>
+
+namespace OpenGLRenderer
+{
+
+class FHardwareTexture;
+class FGLDebug;
+
+class OpenGLFrameBuffer : public SystemGLFrameBuffer
+{
+	typedef SystemGLFrameBuffer Super;
+
+	void RenderTextureView(FCanvasTexture* tex, std::function<void(IntRect &)> renderFunc) override;
+
+public:
+
+	explicit OpenGLFrameBuffer() {}
+	OpenGLFrameBuffer(void *hMonitor, bool fullscreen) ;
+	~OpenGLFrameBuffer();
+
+	void InitializeState() override;
+	void Update() override;
+
+	void AmbientOccludeScene(float m5) override;
+	void FirstEye() override;
+	void NextEye(int eyecount) override;
+	void SetSceneRenderTarget(bool useSSAO) override;
+	void UpdateShadowMap() override;
+	void WaitForCommands(bool finish) override;
+	void SetSaveBuffers(bool yes) override;
+	void CopyScreenToBuffer(int width, int height, uint8_t* buffer) override;
+	bool FlipSavePic() const override { return true; }
+
+	FRenderState* RenderState() override;
+	void UpdatePalette() override;
+	const char* DeviceName() const override;
+	IHardwareTexture *CreateHardwareTexture(int numchannels) override;
+	void SetTextureFilterMode() override;
+	void PrecacheMaterial(FMaterial *mat, int translation) override;
+	void BeginFrame() override;
+	void SetViewportRects(IntRect *bounds) override;
+	void BlurScene(float amount) override;
+	IVertexBuffer *CreateVertexBuffer() override;
+	IIndexBuffer *CreateIndexBuffer() override;
+	IDataBuffer *CreateDataBuffer(int bindingpoint, bool ssbo, bool needsresize) 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.
+	virtual TArray<uint8_t> GetScreenshotBuffer(int &pitch, ESSType &color_type, float &gamma) override;
+
+	void Swap();
+	bool IsHWGammaActive() const { return HWGammaActive; }
+
+	void SetVSync(bool vsync);
+
+	void Draw2D() override;
+	void PostProcessScene(bool swscene, 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
+    
+    FTexture *WipeStartScreen() override;
+    FTexture *WipeEndScreen() override;
+
+	int camtexcount = 0;
+};
+
+}
+
+#endif //__GL_FRAMEBUFFER