// Copyright (C) 2003 Dolphin Project.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/

#ifndef _VERTEXSHADERCACHE_H_
#define _VERTEXSHADERCACHE_H_

#include <map>
#include <string>

#include "BPMemory.h"
#include "VertexShaderGen.h"

struct VERTEXSHADER
{
	VERTEXSHADER() : glprogid(0) {}
	GLuint glprogid; // opengl program id

#if defined(_DEBUG) || defined(DEBUGFAST) 
	std::string strprog;
#endif
};

class VertexShaderCache
{
	struct VSCacheEntry
	{ 
		VERTEXSHADER shader;
		int frameCount;
		VSCacheEntry() : frameCount(0) {}
		void Destroy() {
			// printf("Destroying vs %i\n", shader.glprogid);
			glDeleteProgramsARB(1, &shader.glprogid);
			shader.glprogid = 0;
		}
	};

	typedef std::map<VERTEXSHADERUID, VSCacheEntry> VSCache;

	static VSCache vshaders;

    static bool s_displayCompileAlert;
	
	static GLuint CurrentShader;
	static bool ShaderEnabled;

public:
	static void Init();
	static void Shutdown();

	static VERTEXSHADER* GetShader(u32 components);
	static bool CompileVertexShader(VERTEXSHADER& ps, const char* pstrprogram);

	static void SetCurrentShader(GLuint Shader);

	static void DisableShader();
	static void EnableShader(GLuint Shader);
};

#endif // _VERTEXSHADERCACHE_H_