source: downloads/RenderSystems/Direct3D9/include/OgreD3D9HardwarePixelBuffer.h @ 6

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

Copyright (c) 2000-2006 Torus Knot Software Ltd
Also see acknowledgements in Readme.html

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt.

You may alternatively use this source under the terms of a specific version of
the OGRE Unrestricted License provided you have obtained such a license from
Torus Knot Software Ltd.
-----------------------------------------------------------------------------
*/
#ifndef __D3D9PIXELBUFFER_H__
#define __D3D9PIXELBUFFER_H__

#include "OgreD3D9Prerequisites.h"
#include "OgreHardwarePixelBuffer.h"

#include <d3d9.h>
#include <d3dx9.h>
namespace Ogre {

        class D3D9HardwarePixelBuffer: public HardwarePixelBuffer
        {
        protected:
                /// Lock a box
                PixelBox lockImpl(const Image::Box lockBox,  LockOptions options);

                /// Unlock a box
                void unlockImpl(void);

                /// Create (or update) render textures for slices
                void createRenderTextures(bool update);
                /// Destroy render textures for slices
                void destroyRenderTextures();
                
                /// D3DDevice pointer
                IDirect3DDevice9 *mpDev;
                
                /// Surface abstracted by this buffer
                IDirect3DSurface9 *mSurface;
                /// Volume abstracted by this buffer
                IDirect3DVolume9 *mVolume;
                /// Temporary surface in main memory if direct locking of mSurface is not possible
                IDirect3DSurface9 *mTempSurface;
                /// Temporary volume in main memory if direct locking of mVolume is not possible
                IDirect3DVolume9 *mTempVolume;
                
                /// Mipmapping
                bool mDoMipmapGen;
                bool mHWMipmaps;
                IDirect3DBaseTexture9 *mMipTex;

                /// Render targets
                typedef std::vector<RenderTexture*> SliceTRT;
        SliceTRT mSliceTRT;
        public:
                D3D9HardwarePixelBuffer(HardwareBuffer::Usage usage);
                
                /// Call this to associate a D3D surface or volume with this pixel buffer
                void bind(IDirect3DDevice9 *dev, IDirect3DSurface9 *mSurface, bool update);
                void bind(IDirect3DDevice9 *dev, IDirect3DVolume9 *mVolume, bool update);
                
                /// @copydoc HardwarePixelBuffer::blit
        void blit(const HardwarePixelBufferSharedPtr &src, const Image::Box &srcBox, const Image::Box &dstBox);
                
                /// @copydoc HardwarePixelBuffer::blitFromMemory
                void blitFromMemory(const PixelBox &src, const Image::Box &dstBox);
                
                /// @copydoc HardwarePixelBuffer::blitToMemory
                void blitToMemory(const Image::Box &srcBox, const PixelBox &dst);
                
                /// Internal function to update mipmaps on update of level 0
                void _genMipmaps();
                
                /// Function to set mipmap generation
                void _setMipmapping(bool doMipmapGen, bool HWMipmaps, IDirect3DBaseTexture9 *mipTex);
                
                ~D3D9HardwarePixelBuffer();

                /// Get rendertarget for z slice
                RenderTexture *getRenderTarget(size_t zoffset);

                /// Accessor for surface
                IDirect3DSurface9 *getSurface() { return mSurface; }

                /// Notify TextureBuffer of destruction of render target
        virtual void _clearSliceRTT(size_t zoffset)
        {
            mSliceTRT[zoffset] = 0;
        }
        };
};
#endif