Uniform.h

//=================================================================================================================================
//
// Author: Maurice Ribble
//         3D Application Research Group
//         ATI Research, Inc.
//
// Definitions for the Uniform class.  This class loads textures, attributes, and uniforms.
//
//=================================================================================================================================
// $Id: //depot/3darg/Tools/Handheld/esTestApps/common/Uniform.h#1 $ 
// 
// Last check-in:  $DateTime: 2008/01/23 11:45:40 $ 
// Last edited by: $Author: dginsbur $
//=================================================================================================================================
//   (C) ATI Research, Inc. 2006 All rights reserved. 
//=================================================================================================================================

#ifndef _UNIFORM_H_
#define _UNIFORM_H_

#ifdef USE_STANDARD_GL
#include <glew.h>
#else
#include <GLES2/gl2.h>
#define GL_GLEXT_PROTOTYPES
#include <GLES2/gl2ext.h>
#include <Misc.h>
#endif //USE_STANDARD_GL

#include "UniformData.h"
#include "ArgDefines.h"
#include <vector>
#include <string>

#define GEN_TEX_UNIT 0
#define GEN_TEX_ID 100

#define SAMPLE_FLOAT        0x1
#define SAMPLE_FLOAT_VEC2   0x2
#define SAMPLE_FLOAT_VEC3   0x3
#define SAMPLE_FLOAT_VEC4   0x4
#define SAMPLE_INT          0x5
#define SAMPLE_FLOAT_MAT4   0xd
#define SAMPLE_PROGRAM      0xe

//=================================================================================================================================
/// Uniform class - Derived from UniformData class.  This class loads and sets the uniforms, attributes, and textures.
//=================================================================================================================================
class Uniform : public UniformData
{
public:
   /// \brief Gets es texture id.
   int32 getUnitID() const { return m_unitID; }

   /// \brief Loads uniforms/textures/attributes from text file into structure.
   bool parseUniforms(const char8* fileName,const char8* dataPath);

   /// \brief Updates the value of a uniform
   bool updateOneUniform( const char8* name, float32* vals );

   /// \brief Gets the program handle
   GLuint Uniform::getProgramHandle( const char8* name );

   /// \brief Binds a texture into GL
   bool bindTexture( const char8* name, int32 width, int32 height );

   /// \brief Binds an FBO into GL
   bool bindFbo( const char8* name, int32 width, int32 height );

   /// \brief Deletes all the GL resources that we have loaded
   void freeAllData();

   /// \brief Updates all the uniform data after a link
   void updateAllUniforms( GLuint curProg );

private:
   bool Uniform::loadShaderObject( const char8* filename, GLuint shaderHandle );

   //typedef std::vector<UniformData*>	   UniformDataList;
  // typedef UniformDataList::iterator	UniformDataIterator;
   struct UniformDataList
   {
	   UniformData**	   UniformDList;  /*Store UniformData list */
	   uint32 size;           /*Actually store number of UniformData*/
	   uint32 capacity;      /*Allocate capacity of UniformData*/
   };
//	typedef UniformData*	   UniformDataList;
    //typedef UniformDatalist	   UniformDataList;
   /// Vector of all the data for the different uniforms/textures/attributes.
  UniformDataList *m_uniforms;

   // The most recent program handle (used to know which program attribs and uniforms are bound to)
   GLuint m_recentProgramHandle;

   /// Iter to walk through all the uniform/texture/attribute data
   int32 m_unitID;
};

#endif // _UNIFORM_H_