OgreD3D9HardwarePixelBuffer.h

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/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2013 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy
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in the Software without restriction, including without limitation the rights
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The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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THE SOFTWARE.
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*/
#ifndef __D3D9PIXELBUFFER_H__
#define __D3D9PIXELBUFFER_H__

#include "OgreD3D9Prerequisites.h"
#include "OgreHardwarePixelBuffer.h"
#include "Threading/OgreThreadHeaders.h"

namespace Ogre {

    class D3D9Texture;
    class D3D9RenderTexture;

    class _OgreD3D9Export D3D9HardwarePixelBuffer: public HardwarePixelBuffer
    {
    protected:      
        struct BufferResources
        {           
            IDirect3DSurface9* surface;
            IDirect3DSurface9* fSAASurface;
            IDirect3DVolume9* volume;
            IDirect3DSurface9* tempSurface;
            IDirect3DVolume9* tempVolume;
            IDirect3DBaseTexture9 *mipTex;          
        };

        typedef map<IDirect3DDevice9*, BufferResources*>::type  DeviceToBufferResourcesMap;
        typedef DeviceToBufferResourcesMap::iterator            DeviceToBufferResourcesIterator;

        DeviceToBufferResourcesMap  mMapDeviceToBufferResources;
                
        bool mDoMipmapGen;
        bool mHWMipmaps;
        
        D3D9RenderTexture* mRenderTexture;

        // The owner texture if exists.
        D3D9Texture* mOwnerTexture;
        
        // The current lock flags of this surface.
        DWORD mLockFlags;

        // Device access mutex.
        OGRE_STATIC_MUTEX(msDeviceAccessMutex);
    protected:
        PixelBox lockImpl(const Image::Box lockBox,  LockOptions options);
        PixelBox lockBuffer(BufferResources* bufferResources, const Image::Box &lockBox, DWORD flags);

        void unlockImpl(void);
        void unlockBuffer(BufferResources* bufferResources);

        BufferResources* getBufferResources(IDirect3DDevice9* d3d9Device);
        BufferResources* createBufferResources();
    
        void updateRenderTexture(bool writeGamma, uint fsaa, const String& srcName);
        void destroyRenderTexture();

        void blit(IDirect3DDevice9* d3d9Device, const HardwarePixelBufferSharedPtr &src,
                const Image::Box &srcBox, const Image::Box &dstBox, 
                BufferResources* srcBufferResources, 
                BufferResources* dstBufferResources);
        void blitFromMemory(const PixelBox &src, const Image::Box &dstBox, BufferResources* dstBufferResources);

        void blitToMemory(const Image::Box &srcBox, const PixelBox &dst, BufferResources* srcBufferResources, IDirect3DDevice9* d3d9Device);
            
    public:
        D3D9HardwarePixelBuffer(HardwareBuffer::Usage usage, 
            D3D9Texture* ownerTexture);
        ~D3D9HardwarePixelBuffer();

        void bind(IDirect3DDevice9 *dev, IDirect3DSurface9 *mSurface, IDirect3DSurface9* fsaaSurface,
                  bool writeGamma, uint fsaa, const String& srcName, IDirect3DBaseTexture9 *mipTex);
        void bind(IDirect3DDevice9 *dev, IDirect3DVolume9 *mVolume, IDirect3DBaseTexture9 *mipTex);
        
        void blit(const HardwarePixelBufferSharedPtr &src, const Image::Box &srcBox, const Image::Box &dstBox);
        
        void blitFromMemory(const PixelBox &src, const Image::Box &dstBox);
    
        void blitToMemory(const Image::Box &srcBox, const PixelBox &dst);
        
        void _genMipmaps(IDirect3DBaseTexture9* mipTex);
        
        void _setMipmapping(bool doMipmapGen, bool HWMipmaps);
        
        
        RenderTexture *getRenderTarget(size_t zoffset);

        IDirect3DSurface9 *getSurface(IDirect3DDevice9* d3d9Device);
        
        IDirect3DSurface9 *getFSAASurface(IDirect3DDevice9* d3d9Device);

        virtual void _clearSliceRTT(size_t zoffset);

        void releaseSurfaces(IDirect3DDevice9* d3d9Device);

        void destroyBufferResources(IDirect3DDevice9* d3d9Device);

        // Called when device state is changing. Access to any device should be locked.
        // Relevant for multi thread application.
        static void lockDeviceAccess();

        // Called when device state change completed. Access to any device is allowed.
        // Relevant for multi thread application.
        static void unlockDeviceAccess();
    };
};
#endif