OgreGLESDefaultHardwareBufferManager.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) 2008 Renato Araujo Oliveira Filho <renatox@gmail.com>
Copyright (c) 2000-2014 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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furnished to do so, subject to the following conditions:

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,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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*/

#ifndef __GLESDefaultHardwareBufferManager_H__
#define __GLESDefaultHardwareBufferManager_H__

#include "OgreGLESPrerequisites.h"
#include "OgreHardwareBufferManager.h"
#include "OgreHardwareVertexBuffer.h"
#include "OgreHardwareIndexBuffer.h"

namespace Ogre {
    class _OgreGLESExport GLESDefaultHardwareVertexBuffer : public HardwareVertexBuffer
    {
        protected:
            unsigned char* mData;
            void* lockImpl(size_t offset, size_t length, LockOptions options);
            void unlockImpl(void);

        public:
            GLESDefaultHardwareVertexBuffer(size_t vertexSize, size_t numVertices,
                                            HardwareBuffer::Usage usage);
            GLESDefaultHardwareVertexBuffer(HardwareBufferManagerBase* mgr, size_t vertexSize, size_t numVertices, 
                                            HardwareBuffer::Usage usage);
            virtual ~GLESDefaultHardwareVertexBuffer();
            void readData(size_t offset, size_t length, void* pDest);
            void writeData(size_t offset, size_t length, const void* pSource,
                           bool discardWholeBuffer = false);
            void* lock(size_t offset, size_t length, LockOptions options);
            void unlock(void);

            void* getDataPtr(size_t offset) const { return (void*)(mData + offset); }
    };

    class _OgreGLESExport GLESDefaultHardwareIndexBuffer : public HardwareIndexBuffer
    {
        protected:
            unsigned char* mData;
            void* lockImpl(size_t offset, size_t length, LockOptions options);
            void unlockImpl(void);

        public:
            GLESDefaultHardwareIndexBuffer(IndexType idxType, size_t numIndexes, HardwareBuffer::Usage usage);
            virtual ~GLESDefaultHardwareIndexBuffer();
            void readData(size_t offset, size_t length, void* pDest);
            void writeData(size_t offset, size_t length, const void* pSource,
                    bool discardWholeBuffer = false);
            void* lock(size_t offset, size_t length, LockOptions options);
            void unlock(void);

            void* getDataPtr(size_t offset) const { return (void*)(mData + offset); }
    };

    class _OgreGLESExport GLESDefaultHardwareBufferManagerBase : public HardwareBufferManagerBase
    {
        public:
            GLESDefaultHardwareBufferManagerBase();
            virtual ~GLESDefaultHardwareBufferManagerBase();
            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(void);
        HardwareUniformBufferSharedPtr
        createUniformBuffer(size_t sizeBytes, HardwareBuffer::Usage usage,bool useShadowBuffer, const String& name = "")
        {
            OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR,
                        "GLES does not support uniform buffer objects",
                        "GLESDefaultHardwareBufferManagerBase::createUniformBuffer");
        }
        HardwareCounterBufferSharedPtr createCounterBuffer(size_t sizeBytes,
                                                           HardwareBuffer::Usage usage = HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE,
                                                           bool useShadowBuffer = false, const String& name = "")
        {
            OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR,
                        "GLES does not support atomic counter buffers",
                        "GLESDefaultHardwareBufferManagerBase::createCounterBuffer");
        }
    };

    class _OgreGLESExport GLESDefaultHardwareBufferManager : public HardwareBufferManager
    {
    public:
        GLESDefaultHardwareBufferManager()
            : HardwareBufferManager(OGRE_NEW GLESDefaultHardwareBufferManagerBase()) 
        {

        }
        ~GLESDefaultHardwareBufferManager()
        {
            OGRE_DELETE mImpl;
        }
        HardwareUniformBufferSharedPtr
        createUniformBuffer(size_t sizeBytes, HardwareBuffer::Usage usage,bool useShadowBuffer, const String& name = "")
        {
            OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR,
                        "GLES does not support render to vertex buffer objects",
                        "GLESDefaultHardwareBufferManager::createUniformBuffer");
        }
    };
}

#endif