text: // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //    http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  // IndexDataManager.h: Defines the IndexDataManager, a class that
  // runs the Buffer translation process for index buffers.
  
  #ifndef LIBGL_INDEXDATAMANAGER_H_
  #define LIBGL_INDEXDATAMANAGER_H_
  
  #include "Context.h"
  
  #define _GDI32_
  #include <windows.h>
  #include <GL/GL.h>
  #include <GL/glext.h>
  
  namespace gl
  {
  
  struct TranslatedIndexData
  {
  	unsigned int minIndex;
  	unsigned int maxIndex;
  	unsigned int indexOffset;
  
  	sw::Resource *indexBuffer;
  };
  
  class StreamingIndexBuffer
  {
  public:
  	StreamingIndexBuffer(unsigned int initialSize);
  	virtual ~StreamingIndexBuffer();
  
  	void *map(unsigned int requiredSpace, unsigned int *offset);
  	void unmap();
  	void reserveSpace(unsigned int requiredSpace, GLenum type);
  
  	sw::Resource *getResource() const;
  
  private:
  	sw::Resource *mIndexBuffer;
  	unsigned int mBufferSize;
  	unsigned int mWritePosition;
  };
  
  class IndexDataManager
  {
  public:
  	IndexDataManager();
  	virtual ~IndexDataManager();
  
  	GLenum prepareIndexData(GLenum type, GLsizei count, Buffer *arrayElementBuffer, const void *indices, TranslatedIndexData *translated);
  
  	static std::size_t typeSize(GLenum type);
  
  private:
  	StreamingIndexBuffer *mStreamingBuffer;
  };
  
  }
  
  #endif   // LIBGL_INDEXDATAMANAGER_H_
  