OgreGLFBORenderTexture.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 __OgreGLFBORTT_H__
#define __OgreGLFBORTT_H__

#include "OgreGLRenderTexture.h"
#include "OgreGLContext.h"
#include "OgreGLFrameBufferObject.h"

#define GL_DEPTH24_STENCIL8_EXT                           0x88F0


namespace Ogre {
    class GLFBOManager;

    class GLFBORenderTexture: public GLRenderTexture
    {
    public:
        GLFBORenderTexture(GLFBOManager *manager, const String &name, const GLSurfaceDesc &target);

        virtual void getCustomAttribute(const String& name, void* pData);
    protected:
        GLFrameBufferObject mFB;
    };
    
    class GLFBOManager: public GLRTTManager
    {
    public:
        GLFBOManager(bool atimode);
        ~GLFBOManager();
        
        void bind(RenderTarget *target);
        
        void unbind(RenderTarget *target) {};
        
        void getBestDepthStencil(GLenum internalFormat, GLenum *depthFormat, GLenum *stencilFormat);
        
        virtual GLFBORenderTexture *createRenderTexture(const String &name, const GLSurfaceDesc &target);

        virtual MultiRenderTarget* createMultiRenderTarget(const String & name);
        
        GLFrameBufferObject *createFrameBufferObject();
        
        void destroyFrameBufferObject(GLFrameBufferObject *);
        
        GLSurfaceDesc requestRenderBuffer(GLenum format, size_t width, size_t height);
        void releaseRenderBuffer(const GLSurfaceDesc &surface);
        
        bool checkFormat(PixelFormat format) { return mProps[format].valid; }
        
        GLuint getTemporaryFBO() { return mTempFBO; }
    private:
        struct FormatProperties
        {
            bool valid; // This format can be used as RTT (FBO)
            
            struct Mode
            {
                size_t depth;     // Depth format (0=no depth)
                size_t stencil;   // Stencil format (0=no stencil)
            };
            
            std::vector<Mode> modes;
        };
        FormatProperties mProps[PF_COUNT];
        
        struct RBFormat
        {
            RBFormat(GLenum format, size_t width, size_t height):
                format(format), width(width), height(height)
            {}
            GLenum format;
            size_t width;
            size_t height;
            // Overloaded comparison operator for usage in map
            bool operator < (const RBFormat &other) const
            {
                if(format < other.format)
                {
                    return true;
                }
                else if(format == other.format)
                {
                    if(width < other.width)
                    {
                        return true;
                    }
                    else if(width == other.width)
                    {
                        if(height < other.height)
                            return true;
                    }
                }
                return false;
            }
        };
        struct RBRef
        {
            RBRef(){}
            RBRef(GLRenderBuffer *buffer):
                buffer(buffer), refcount(1)
            { }
            GLRenderBuffer *buffer;
            size_t refcount;
        };
        typedef std::map<RBFormat, RBRef> RenderBufferMap;
        RenderBufferMap mRenderBufferMap;
        // map(format, sizex, sizey) -> [GLSurface*,refcount]
        
        GLuint mTempFBO;
        
        bool mATIMode;
        
        void detectFBOFormats();
        GLuint _tryFormat(GLenum depthFormat, GLenum stencilFormat);
    };
    

}

#endif

---

Copyright © 2000-2005 by The OGRE Team

This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Sun Mar 12 14:37:41 2006