include/vrvGraphics/DtFormatRenderer.h

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/******************************************************************************
** Copyright (c) 2010 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once
#include <vrvGraphics/vrvGraphics.h>
#include <GL/glew.h>

namespace makVrv
{
   class DT_DLL_VRVGRAPHICS DtRenderModes
   {
   public:

      static unsigned int theVertexCountToModeMap[5];
   };

   template <typename VertexFormat> 
   class DtFormatRenderer
   {
   public:


      //Draw arrays using client memory.
      void drawArrays(unsigned int vertexCount, const VertexFormat* vertexArray, unsigned int index, unsigned int count)
      {
         bindVertexArrays(vertexArray);
         glDrawArrays(DtRenderModes::theVertexCountToModeMap[vertexCount],index,count);
         unbindVertexArrays();
      }

      //Draw arrays using server memory.
      void drawArrays(unsigned int vertexCount, unsigned int vbo, unsigned int index, unsigned int count)
      {
         glBindBuffer(GL_ARRAY_BUFFER,vbo);

         bindVertexArrays(0);
         glDrawArrays(DtRenderModes::theVertexCountToModeMap[vertexCount],index,count);
         unbindVertexArrays();    

         glBindBuffer(GL_ARRAY_BUFFER,0);
      }

      //Draw elements using client memory.   
      void drawElements(unsigned int vertexCount, const VertexFormat* vertexArray, const unsigned int* indicies, unsigned int count )
      {
         bindVertexArrays(vertexArray);            
         glDrawElements(DtRenderModes::theVertexCountToModeMap[vertexCount], count, GL_UNSIGNED_INT, indicies);      
         unbindVertexArrays();  
      }

      //Draw elements using server memory.
      void drawElements(unsigned int vertexCount, unsigned int  vbo, unsigned int  ibo, unsigned int count )
      {
         glBindBuffer(GL_ARRAY_BUFFER,vbo);
         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,ibo);

         bindVertexArrays(0);            
         glDrawElements(DtRenderModes::theVertexCountToModeMap[vertexCount], count, GL_UNSIGNED_INT, 0);      
         unbindVertexArrays();  

         glBindBuffer(GL_ARRAY_BUFFER,0);
         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,0);
      }

   protected:  
      virtual void bindVertexArrays(const VertexFormat* vertexArray) = 0;
      virtual void unbindVertexArrays() = 0;   
   };

}