OgreGLES2HardwareBufferManager.h

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/*
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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

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*/

#ifndef __GLES2HardwareBufferManager_H__
#define __GLES2HardwareBufferManager_H__

#include "OgreGLES2Prerequisites.h"
#include "OgreHardwareBufferManager.h"

namespace Ogre {
    // Default threshold at which glMapBuffer becomes more efficient than glBufferSubData (32k?)
    #   define OGRE_GL_DEFAULT_MAP_BUFFER_THRESHOLD (1024 * 32)

    class _OgreGLES2Export GLES2HardwareBufferManagerBase : public HardwareBufferManagerBase
    {
        protected:
            char* mScratchBufferPool;
            OGRE_MUTEX(mScratchMutex)
            size_t mMapBufferThreshold;

        public:
            GLES2HardwareBufferManagerBase();
            virtual ~GLES2HardwareBufferManagerBase();
            HardwareVertexBufferSharedPtr createVertexBuffer(size_t vertexSize,
                size_t numVerts, HardwareBuffer::Usage usage, bool useShadowBuffer = false);
            HardwareIndexBufferSharedPtr createIndexBuffer(
                HardwareIndexBuffer::IndexType itype, size_t numIndexes,
                HardwareBuffer::Usage usage, bool useShadowBuffer = false);
            RenderToVertexBufferSharedPtr createRenderToVertexBuffer();

            static GLenum getGLUsage(unsigned int usage);

            static GLenum getGLType(unsigned int type);

            void* allocateScratch(uint32 size);

            void deallocateScratch(void* ptr);

            size_t getGLMapBufferThreshold() const;
            void setGLMapBufferThreshold( const size_t value );
    };

    class _OgreGLES2Export GLES2HardwareBufferManager : public HardwareBufferManager
    {
    public:
        GLES2HardwareBufferManager()
            : HardwareBufferManager(OGRE_NEW GLES2HardwareBufferManagerBase()) 
        {

        }
        ~GLES2HardwareBufferManager()
        {
            OGRE_DELETE mImpl;
        }

        static GLenum getGLUsage(unsigned int usage) 
            { return GLES2HardwareBufferManagerBase::getGLUsage(usage); }

        static GLenum getGLType(unsigned int type)
            { return GLES2HardwareBufferManagerBase::getGLType(type); }

        void* allocateScratch(uint32 size)
        {
            return static_cast<GLES2HardwareBufferManagerBase*>(mImpl)->allocateScratch(size);
        }

        void deallocateScratch(void* ptr)
        {
            static_cast<GLES2HardwareBufferManagerBase*>(mImpl)->deallocateScratch(ptr);
        }

        size_t getGLMapBufferThreshold() const
        {
            return static_cast<GLES2HardwareBufferManagerBase*>(mImpl)->getGLMapBufferThreshold();
        }
        void setGLMapBufferThreshold( const size_t value )
        {
            static_cast<GLES2HardwareBufferManagerBase*>(mImpl)->setGLMapBufferThreshold(value);
        }

    };

}

#endif