OgreGLHardwarePixelBuffer.h

Go to the documentation of this file.

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

Copyright (c) 2000-2005 The OGRE Team
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.
-----------------------------------------------------------------------------
*/
#ifndef __GLPIXELBUFFER_H__
#define __GLPIXELBUFFER_H__

#include "OgreGLPrerequisites.h"
#include "OgreHardwarePixelBuffer.h"

namespace Ogre {

    class GLHardwarePixelBuffer: public HardwarePixelBuffer
    {
    protected:
        PixelBox lockImpl(const Image::Box lockBox,  LockOptions options);

        void unlockImpl(void);
        
        enum Type {
            TYPE_TEXTURE,       // Texture subsurface
            TYPE_FRAMEBUFFER,   // Framebuffer surface
            TYPE_PBO            // Plain pixel buffer object
        };
        Type mType;
        
        // In case this is a texture level, define the texture type and ID
        GLenum mTarget;
        GLenum mFaceTarget; // same as mTarget in case of GL_TEXTURE_xD, but cubemap face for cubemaps
        GLuint mTextureID;
        GLint mFace;
        GLint mLevel;
        bool mSoftwareMipmap;       // Use GLU for mip mapping
        // Internal buffer; either on-card or in system memory, freed/allocated on demand
        // depending on buffer usage
        PixelBox mBuffer;
        
        // Buffer allocation/freeage
        void allocateBuffer();
        void freeBuffer();
        // Upload a box of pixels to this buffer on the card
        void upload(const PixelBox &data);
        // Download a box of pixels from the card
        void download(const PixelBox &data);
    public:
        GLHardwarePixelBuffer(GLenum target, GLuint id, GLint face, GLint level, Usage usage, 
            bool softwareMipmap);
        
        void blit(HardwarePixelBuffer *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);
        
        ~GLHardwarePixelBuffer();
    };

};

#endif

---

Copyright © 2000-2005 by The OGRE Team

This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Sun Feb 12 12:59:45 2006