/*
Copyright (C) 2003 Rice1964

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; either version 2
of the License, or (at your option) any later version.

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 for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

#ifndef _OGLEXT_COMBINER_H_
#define _OGLEXT_COMBINER_H_

#include "OGLCombiner.h"
#include "GL/gl.h"

typedef struct
{
	BYTE	arg0;
	BYTE	arg1;
	BYTE	arg2;
} OGLExt1CombType;

typedef struct {
	union {
		struct {
			GLenum	rgbOp;
			GLenum	alphaOp;
		};
		GLenum ops[2];
	};

	union {
		struct {
			BYTE	rgbArg0;
			BYTE	rgbArg1;
			BYTE	rgbArg2;
			BYTE	alphaArg0;
			BYTE	alphaArg1;
			BYTE	alphaArg2;
		};
		OGLExt1CombType Combs[2];
	};

	//float	scale;		//Will not be used
} OGLExtCombinerType;

typedef struct {
	DWORD	dwMux0;
	DWORD	dwMux1;
	OGLExtCombinerType units[8];
	int		numOfUnits;
} OGLExtCombinerSaveType;


//========================================================================
class COGLExtColorCombiner : public COGLColorCombiner
{
public:
	bool Initialize(void);
protected:
	friend class OGLDeviceBuilder;
	void InitCombinerCycle12(void);
	void InitCombinerCycleFill(void);

	COGLExtColorCombiner(CDaedalusRender *pRender);
	~COGLExtColorCombiner() {};

	bool m_bOGLExtCombinerSupported;		// Is this OGL extension combiner supported by the video card driver?
	bool m_bSupportModAdd_ATI;
	bool m_bSupportModSub_ATI;
	int m_maxTexUnits;
	int	m_lastIndex;
	DWORD m_dwLastMux0;
	DWORD m_dwLastMux1;

#ifdef _DEBUG
	void DisplaySimpleMuxString(void);
#endif

private:
	std::vector<OGLExtCombinerSaveType>		m_vCompiledSettings;
	virtual int ParseDecodedMux();
	virtual int ParseDecodedMux2Units();
	virtual int SaveParsedResult(OGLExtCombinerSaveType &result);
	virtual int FindCompiledMux();
	virtual void GenerateCombinerSetting(int index);
	virtual void GenerateCombinerSettingConstants(int index);

	static GLenum MapRGBArgs(BYTE arg);
	static GLenum MapRGBArgFlags(BYTE arg);
	static GLenum MapAlphaArgs(BYTE arg);
	static GLenum MapAlphaArgFlags(BYTE arg);
	static GLenum RGBArgsMap[];
	static const char* GetOpStr(GLenum op);
};

#endif