/*
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 _OGL_COMBINER_NV_H_
#define _OGL_COMBINER_NV_H_

#include "OGLExtCombiner.h"
#include "gl/gl.h"
#include "OGLDecodedMux.h"

typedef struct {
	uint8 a;
	uint8 b;
	uint8 c;
	uint8 d;
} NVGeneralCombinerType;

typedef struct {
	uint8 a;
	uint8 b;
	uint8 c;
	uint8 d;
	uint8 e;
	uint8 f;
	uint8 g;
} NVFinalCombinerType;

typedef struct {
	GLenum variable;
	GLenum input;
	GLenum mapping;
	GLenum componentUsage;
} NVCombinerInputType;

typedef struct {
	GLenum abOutput;
	GLenum cdOutput;
	GLenum sumOutput;
	GLenum scale;
	GLenum bias;
	GLboolean abDotProduct;
	GLboolean cdDotProduct;
	GLboolean muxSum;
} NVCombinerOutputType;


typedef struct {
	union {
		struct {
			NVGeneralCombinerType	s1rgb;
			NVGeneralCombinerType	s1alpha;
			NVGeneralCombinerType	s2rgb;
			NVGeneralCombinerType	s2alpha;
			NVFinalCombinerType		finalrgb;
			NVFinalCombinerType		finalalpha;
		};
		struct {
			NVGeneralCombinerType	generalCombiners[4];
			NVFinalCombinerType		finalCombiners[2];
		};
	};
	int		stagesUsed;
	uint8	constant0;
	uint8	constant1;
} NVRegisterCombinerParserType;

typedef struct {
	NVCombinerInputType					stage1RGB[4];
	NVCombinerInputType					stage1Alpha[4];
	NVCombinerOutputType				stage1outputRGB;
	NVCombinerOutputType				stage1outputAlpha;
	
	NVCombinerInputType					stage2RGB[4];
	NVCombinerInputType					stage2Alpha[4];
	NVCombinerOutputType				stage2outputRGB;
	NVCombinerOutputType				stage2outputAlpha;

	NVCombinerInputType					finalStage[7];

	int									numOfStages;

	uint32								dwMux0;
	uint32								dwMux1;

	uint8								constant0;
	uint8								constant1;
} NVRegisterCombinerSettingType;

class COGLColorCombinerNvidia : public COGLColorCombiner4
{
public:
	bool Initialize(void);
	void InitCombinerBlenderForSimpleTextureDraw(uint32 tile=0);
protected:
	friend class OGLDeviceBuilder;

	void InitCombinerCycle12(void);
	void DisableCombiner(void);
	void InitCombinerCycleCopy(void);
	void InitCombinerCycleFill(void);
	

	int FindCompiledMux(void);
	void GenerateNVRegisterCombinerSetting(int);
	void GenerateNVRegisterCombinerSettingConstants(int);				// Compile the decodedMux into NV register combiner setting
	void ApplyFogAtFinalStage();

	void ParseDecodedMux(NVRegisterCombinerParserType &result);				// Compile the decodedMux into NV register combiner setting
	void ParseDecodedMuxForConstant(NVRegisterCombinerParserType &result);				// Compile the decodedMux into NV register combiner setting
	int SaveParserResult(const NVRegisterCombinerParserType &result);
	
	int StagesNeedToUse(COGLDecodedMux &mux, N64StageNumberType stage);
	int Parse1Mux(COGLDecodedMux &mux, N64StageNumberType stage, NVGeneralCombinerType &res);	// Compile the decodedMux into NV register combiner setting
	int Parse1Mux2Stages(COGLDecodedMux &mux, N64StageNumberType stage, NVGeneralCombinerType &res, NVGeneralCombinerType &res2);
	int Parse1MuxForStage2AndFinalStage(COGLDecodedMux &mux, N64StageNumberType stage, NVGeneralCombinerType &res, NVFinalCombinerType &fres);
	void Parse1MuxForFinalStage(COGLDecodedMux &mux, N64StageNumberType stage, NVFinalCombinerType &fres);
	void ByPassFinalStage(NVFinalCombinerType &fres);
	void ByPassGeneralStage(NVGeneralCombinerType &res);

	GLenum ConstMap(uint8 c);

	COGLColorCombinerNvidia(CRender *pRender);
	~COGLColorCombinerNvidia();

	std::vector<NVRegisterCombinerSettingType>	m_vCompiledSettings;

	bool m_bNVSupported;		// Is this NV OGL extension combiner supported by the video card driver?
};

#endif
