text: /*
    -----------------------------------------------------------------------------
    This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
    For the latest info, see http://www.ogre3d.org/
  
    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
    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 __GL3PlusTextureBuffer_H__
  #define __GL3PlusTextureBuffer_H__
  
  #include "OgreGL3PlusHardwarePixelBuffer.h"
  
  namespace Ogre {
  
      /** Texture surface.
       */
      class _OgreGL3PlusExport GL3PlusTextureBuffer: public GL3PlusHardwarePixelBuffer
      {
      public:
          /** Texture constructor */
          GL3PlusTextureBuffer(const String &baseName, GLenum target, GLuint id,
                               GLint face, GLint level, Usage usage,
                               bool writeGamma, uint fsaa);
          ~GL3PlusTextureBuffer();
  
          /// @copydoc HardwarePixelBuffer::bindToFramebuffer
          virtual void bindToFramebuffer(GLenum attachment, uint32 zoffset);
  
          /// @copydoc HardwarePixelBuffer::getRenderTarget
          RenderTexture* getRenderTarget(size_t);
  
          /// Upload a box of pixels to this buffer on the card.
          virtual void upload(const PixelBox &data, const Image::Box &dest);
  
          /// Download a box of pixels from the card.
          virtual void download(const PixelBox &data);
  
          /// Hardware implementation of blitFromMemory.
          virtual void blitFromMemory(const PixelBox &src_orig, const Image::Box &dstBox);
  
          /// Notify TextureBuffer of destruction of render target.
          void _clearSliceRTT(size_t zoffset)
          {
              mSliceTRT[zoffset] = 0;
          }
  
          /// Copy from framebuffer.
          void copyFromFramebuffer(uint32 zoffset);
  
          /// @copydoc HardwarePixelBuffer::blit
          void blit(const HardwarePixelBufferSharedPtr &src,
                    const Image::Box &srcBox, const Image::Box &dstBox);
          // Blitting implementation
          void blitFromTexture(GL3PlusTextureBuffer *src,
                               const Image::Box &srcBox, const Image::Box &dstBox);
  
      protected:
          // In case this is a texture level.
          GLenum mTarget;
          // Same as mTarget in case of GL_TEXTURE_xD, but cubemap face
          // for cubemaps.
          GLenum mFaceTarget;
          GLuint mTextureID;
          GLuint mBufferId;
          GLint mFace;
          GLint mLevel;
  
          typedef vector<RenderTexture*>::type SliceTRT;
          SliceTRT mSliceTRT;
  
          void _bindToFramebuffer(GLenum attachment, uint32 zoffset, GLenum which);
      };
  
  }
  
  #endif
  