/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

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 __GLSLGpuProgram_H__
#define __GLSLGpuProgram_H__

// Precompiler options
#include "CmGLSLExtSupport.h"
#include "CmGpuProgram.h"

namespace CamelotFramework {

    /** GLSL low level compiled shader object - this class is used to get at the linked program object 
		and provide an interface for GLRenderSystem calls.  GLSL does not provide access to the
		low level code of the shader so this class is really just a dummy place holder.
		GLSL uses a program object to represent the active vertex and fragment programs used
		but Ogre materials maintain seperate instances of the active vertex and fragment programs
		which creates a small problem for GLSL integration.  The GLSLGpuProgram class provides the
		interface between the GLSLLinkProgramManager , GLRenderSystem, and the active GLSLProgram
		instances.
	*/
    class CM_RSGL_EXPORT GLSLGpuProgram : public GpuProgram
    {
	public:
		~GLSLGpuProgram();

		/// get the GLSLProgram for the shader object
		GLSLProgram* getGLSLProgram(void) const { return mGLSLProgram; }

		void setGLSLProgram(GLSLProgram* program) { mGLSLProgram = program; }
		
		/// Get the assigned GL program id
		const UINT32 getProgramID(void) const { return mProgramID; }

	private:
		friend class GLGpuProgramManager;

		GLSLGpuProgram(const String& source, const String& entryPoint, const String& language, 
			GpuProgramType gptype, GpuProgramProfile profile, const Vector<HGpuProgInclude>::type* includes);

		/// GL Handle for the shader object
		GLSLProgram* mGLSLProgram;

		/// keep track of the number of vertex shaders created
		static UINT32 mVertexShaderCount;
		/// keep track of the number of fragment shaders created
		static UINT32 mFragmentShaderCount;
		/// keep track of the number of geometry shaders created
		static UINT32 mGeometryShaderCount;
		/// keep track of the number of hull shaders created
		static UINT32 mHullShaderCount;
		/// keep track of the number of domain shaders created
		static UINT32 mDomainShaderCount;

		UINT32 mProgramID;
		GLenum mProgramType;
    };
}


#endif // __GLSLGpuProgram_H__