OgreGLESTexture.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) 2000-2011 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
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
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,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-----------------------------------------------------------------------------
*/

#ifndef __GLESTexture_H__
#define __GLESTexture_H__

#include "OgreGLESPrerequisites.h"
#include "OgreGLESSupport.h"
#include "OgrePlatform.h"
#include "OgreRenderTexture.h"
#include "OgreTexture.h"
#include "OgreHardwarePixelBuffer.h"

namespace Ogre {
    class _OgreGLESExport GLESTexture : public Texture
    {
        public:
            // Constructor
            GLESTexture(ResourceManager* creator, const String& name, ResourceHandle handle,
                const String& group, bool isManual, ManualResourceLoader* loader, 
                GLESSupport& support);

            virtual ~GLESTexture();

            void createRenderTexture();
            HardwarePixelBufferSharedPtr getBuffer(size_t face, size_t mipmap);

            // Takes the OGRE texture type (1d/2d/3d/cube) and returns the appropriate GL one
            GLenum getGLESTextureTarget(void) const;

            GLuint getGLID() const
            {
                return mTextureID;
            }
            
        protected:
            void createInternalResourcesImpl(void);
            void prepareImpl(void);
            void unprepareImpl(void);
            void loadImpl(void);
            void freeInternalResourcesImpl(void);
            
            void _createSurfaceList();
            
            typedef SharedPtr<std::vector<Image> > LoadedImages;
            
            LoadedImages mLoadedImages;

        private:
            GLuint mTextureID;
            GLESSupport& mGLSupport;
            
            typedef std::vector<HardwarePixelBufferSharedPtr> SurfaceList;
            SurfaceList mSurfaceList;

    };

    class _OgreGLESExport GLESTexturePtr : public SharedPtr<GLESTexture>
    {
        public:
            GLESTexturePtr() : SharedPtr<GLESTexture>() {}
            explicit GLESTexturePtr(GLESTexture* rep) : SharedPtr<GLESTexture>(rep) {}
            GLESTexturePtr(const GLESTexturePtr& r) : SharedPtr<GLESTexture>(r) {}

            GLESTexturePtr(const ResourcePtr& r) : SharedPtr<GLESTexture>()
            {
                // lock & copy other mutex pointer
                OGRE_MUTEX_CONDITIONAL(r.OGRE_AUTO_MUTEX_NAME)
                {
                    OGRE_LOCK_MUTEX(*r.OGRE_AUTO_MUTEX_NAME)
                    OGRE_COPY_AUTO_SHARED_MUTEX(r.OGRE_AUTO_MUTEX_NAME)
                    pRep = static_cast<GLESTexture*>(r.getPointer());
                    pUseCount = r.useCountPointer();
                    if (pUseCount)
                    {
                        ++(*pUseCount);
                    }
                }
            }

            GLESTexturePtr(const TexturePtr& r) : SharedPtr<GLESTexture>()
            {
                *this = r;
            }

            GLESTexturePtr& operator=(const ResourcePtr& r)
            {
                if (pRep == static_cast<GLESTexture*>(r.getPointer()))
                {
                    return *this;
                }
                release();
                // lock & copy other mutex pointer
                OGRE_MUTEX_CONDITIONAL(r.OGRE_AUTO_MUTEX_NAME)
                {
                    OGRE_LOCK_MUTEX(*r.OGRE_AUTO_MUTEX_NAME)
                    OGRE_COPY_AUTO_SHARED_MUTEX(r.OGRE_AUTO_MUTEX_NAME)
                    pRep = static_cast<GLESTexture*>(r.getPointer());
                    pUseCount = r.useCountPointer();
                    if (pUseCount)
                    {
                        ++(*pUseCount);
                    }
                }
                else
                {
                    // RHS must be a null pointer
                    assert(r.isNull() && "RHS must be null if it has no mutex!");
                    setNull();
                }
                return *this;
            }

            GLESTexturePtr& operator=(const TexturePtr& r)
            {
                if (pRep == static_cast<GLESTexture*>(r.getPointer()))
                    return *this;
                release();
                // lock & copy other mutex pointer
                OGRE_MUTEX_CONDITIONAL(r.OGRE_AUTO_MUTEX_NAME)
                {
                    OGRE_LOCK_MUTEX(*r.OGRE_AUTO_MUTEX_NAME)
                    OGRE_COPY_AUTO_SHARED_MUTEX(r.OGRE_AUTO_MUTEX_NAME)
                    pRep = static_cast<GLESTexture*>(r.getPointer());
                    pUseCount = r.useCountPointer();
                    if (pUseCount)
                    {
                        ++(*pUseCount);
                    }
                }
                else
                {
                    // RHS must be a null pointer
                    assert(r.isNull() && "RHS must be null if it has no mutex!");
                    setNull();
                }
                return *this;
            }
    };
}

#endif