dolphin/Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.h

// 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 _ProgramShaderCache_H_
#define _ProgramShaderCache_H_

#include "GLUtil.h"

#include "VertexShaderCache.h"
#include "PixelShaderCache.h"
#include "PixelShaderGen.h"
#include "VertexShaderGen.h"

	union PID
	{
	        struct {
	        GLuint vsid, psid;
	        };
	        u64 id;
	};

class PROGRAMUID
{
public:

	PID uid;

	PROGRAMUID()
	{
	        uid.id = 0;
	}

	PROGRAMUID(const PROGRAMUID& r)
	{
	        uid.id = r.uid.id;
	}
	PROGRAMUID(GLuint _v, GLuint _p)
	{
	        uid.vsid = _v;
	        uid.psid = _p;
	}

	int GetNumValues() const
	{
	        return uid.id;
	}
};
void GetProgramShaderId(PROGRAMUID *uid, GLuint _v, GLuint _p);

namespace OGL
{
#define NUM_UNIFORMS 27
extern const char *UniformNames[NUM_UNIFORMS];


struct PROGRAMSHADER
{
	PROGRAMSHADER() : glprogid(0), vsid(0), psid(0){}
	GLuint glprogid; // opengl program id
	GLuint vsid, psid;
	GLint attrLoc[3];
	GLint UniformLocations[NUM_UNIFORMS];
};


class ProgramShaderCache
{
	struct PCacheEntry
	{
	        PROGRAMSHADER program;
	        int frameCount;
	        PCacheEntry() : frameCount(0) {}
	        void Destroy() {
	                glDeleteProgram(program.glprogid);
	                program.glprogid = 0;
	        }
	};
	typedef std::map<std::pair<u64, u64>, PCacheEntry> PCache;

	static PCache pshaders;
	static GLuint CurrentFShader, CurrentVShader, CurrentProgram;
	static std::pair<u64, u64> CurrentShaderProgram;

	// For UBOS
	static GLuint UBOBuffers[2]; // PS is 0, VS is 1
public:
	static PROGRAMSHADER GetShaderProgram(void);
	static GLint GetAttr(int num);
	static void SetBothShaders(GLuint PS, GLuint VS);
	static GLuint GetCurrentProgram(void);
	static void SetUniformObjects(int Buffer, unsigned int offset, const float *f, unsigned int count = 1);
	
	static void Init(void);
	static void Shutdown(void);

};

}  // namespace OGL

#endif