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Include/ZRenderer/ZFrameBufferRenderTargetBase.hpp

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+/*
+	ZFramebufferRenderTargetBase.hpp
+	Author: James Russell <jcrussell@762studios.com>
+	Created: 08/07/2011
+
+	Purpose:
+
+	Base class implementation of the ZFramebufferRenderTarget interface.
+
+	License:
+
+	TODO
+*/
+
+#pragma once
+
+#ifndef _ZFRAMEBUFFERRENDERTARGETBASE_HPP
+#define _ZFRAMEBUFFERRENDERTARGETBASE_HPP
+
+#include <ZRenderer/ZFramebufferRenderTarget.hpp>
+#include <ZRenderer/ZTexture.hpp>
+#include <ZRenderer/ZRenderBuffer.hpp>
+
+//Buffer Data Struct, used to indicate buffer state
+struct ZFramebufferRenderTargetBufferState
+{
+	//Our set of attached Color Buffers
+	ZPtr<ZTexture> ColorBuffers[ZFBRT_MAX_COLOR_BUFFERS];
+
+	//Our attached depth texture
+	ZPtr<ZTexture> DepthTexture;
+
+	//Our attached depth buffer
+	ZPtr<ZRenderBuffer> DepthBuffer;
+
+	//Our attached stencil buffer
+	ZPtr<ZRenderBuffer> StencilBuffer;
+
+	//Indicates we are in a usable state
+	bool bIsComplete;
+
+	ZFramebufferRenderTargetBufferState()
+		: bIsComplete(false) { }
+};
+
+//Base class implementation of a frame buffer render target
+class ZFramebufferRenderTargetBase : public ZFramebufferRenderTarget
+{
+private:
+	DISABLE_COPY_AND_ASSIGN(ZFramebufferRenderTargetBase);
+
+protected:
+	//The 'clear' flags
+	ZRenderTargetClearFlags Flags;
+
+	//Width of the FBRT
+	size_t Width;
+
+	//Height of the FBRT
+	size_t Height;
+
+	//Flag indicating state has changed
+	bool bIsDirty;
+
+	//Buffer State for this frame buffer render target
+	ZFramebufferRenderTargetBufferState BufferState;
+
+	/*
+	Constructor.
+
+	@param _width - the width (in pixels / texels) of the FBRT
+	@param _height - the height (in pixels / texels) of the FBRT
+	*/
+	ZFramebufferRenderTargetBase(size_t _width, size_t _height);
+
+public:
+	//Virtual Destructor
+	virtual ~ZFramebufferRenderTargetBase() { }
+
+	/*
+	public ZFramebufferRenderTargetBase::GetBufferState
+	
+	Gets the buffer state for this frame buffer render target.
+	
+	@return (ZFramebufferRenderTargetBufferState*) - the buffer state
+	@context (all)
+	*/
+	ZFramebufferRenderTargetBufferState* GetBufferState();
+
+	/*
+	public ZFramebufferRenderTargetBase::GetBufferStateResetDirty
+
+	Gets the backing buffer state for this render target.  This will return
+	NULL if the buffer state has not been modified since the last call to
+	this function, and in the case it has been modified, a call to this 
+	resets the 'dirty' flag for the render target.
+	
+	@return (ZFramebufferRenderTargetBufferState*) - buffer state, NULL if not modified
+	@context (all)
+	*/
+	ZFramebufferRenderTargetBufferState* GetBufferStateResetDirty();
+
+	/*************************/
+	/* ZRenderTarget Methods */
+	/*************************/
+
+	//Subclass Implementation
+	virtual const ZRenderTargetClearFlags& GetClearFlags();
+
+	//Subclass Implementation
+	virtual size_t GetHeight();
+
+	//Subclass Implementation
+	virtual ZRenderTargetType GetType();
+
+	//Subclass Implementation
+	virtual size_t GetWidth();
+
+	//Subclass Implementation
+	virtual bool SetClearFlags(const ZRenderTargetClearFlags& _flags);
+
+	/************************************/
+	/* ZFramebufferRenderTarget Methods */
+	/************************************/
+
+	//Subclass Implementation
+	virtual bool AttachColorTexture(ZPtr<ZTexture> _texture, size_t _index);
+
+	//Subclass Implementation
+	virtual bool AttachDepthTexture(ZPtr<ZTexture> _texture);
+
+	//Subclass Implementation
+	virtual bool AttachRenderBuffer(ZPtr<ZRenderBuffer> _buffer);
+
+	//Subclass Implementation
+	virtual bool IsComplete();
+
+	//Subclass Implementation
+	virtual bool RemoveColorBuffers();
+
+	//Subclass Implementation
+	virtual bool RemoveDepthBuffer();
+
+	//Subclass Implementation
+	virtual bool RemoveStencilBuffer();
+
+};
+
+#endif
+