/* 
 *	Copyright (C) 2007-2009 Gabest
 *	http://www.gabest.org
 *
 *  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, 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 GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

#pragma once

#include "GPUState.h"
#include "GSRasterizer.h"
#include "GSAlignedClass.h"

union GPUScanlineSelector
{
	struct
	{
		DWORD iip:1; // 0
		DWORD me:1; // 1
		DWORD abe:1; // 2
		DWORD abr:2; // 3
		DWORD tge:1; // 5
		DWORD tme:1; // 6
		DWORD twin:1; // 7
		DWORD tlu:1; // 8
		DWORD dtd:1; // 9
		DWORD ltf:1; // 10
		// DWORD dte:1: // 11
	};

	struct
	{
		DWORD _pad1:1; // 0
		DWORD rfb:2; // 1
		DWORD _pad2:2; // 3
		DWORD tfx:2; // 5
	};

	DWORD dw;

	operator DWORD() {return dw & 0xff;}
};

__declspec(align(16)) struct GPUScanlineEnvironment
{
	GPUScanlineSelector sel;

	GPULocalMemory* mem;
	const void* tex;
	const WORD* clut;

	GSVector4i u[3];
	GSVector4i v[3];

	GSVector4i a;
	GSVector4i md; // similar to gs fba

	GSVector4i ds, dt, dst8;
	GSVector4i dr, dg, db, dc8;
};

__declspec(align(16)) struct GPUScanlineParam
{
	GPUScanlineSelector sel;

	const void* tex;
	const WORD* clut;
};

class GPUDrawScanline : public GSAlignedClass<16>, public IDrawScanline
{
	GPUScanlineEnvironment m_env;

	//

	class GPUDrawScanlineMap : public GSFunctionMap<DrawScanlinePtr>
	{
		DrawScanlinePtr m_default[256];

	public:
		GPUDrawScanlineMap();

		DrawScanlinePtr GetDefaultFunction(DWORD dw);
	};
	
	GPUDrawScanlineMap m_ds;

	//

	class GPUSetupPrimMap : public GSFunctionMap<SetupPrimPtr>
	{
		SetupPrimPtr m_default[2][2][2];

	public:
		GPUSetupPrimMap();

		SetupPrimPtr GetDefaultFunction(DWORD dw);
	};
	
	GPUSetupPrimMap m_sp;

	//

	template<DWORD sprite, DWORD tme, DWORD iip>
	void SetupPrim(const GSVertexSW* vertices, const GSVertexSW& dscan);

	//

	__forceinline void SampleTexture(DWORD ltf, DWORD tlu, DWORD twin, GSVector4i& test, const GSVector4i& s, const GSVector4i& t, GSVector4i* c);
	__forceinline void ColorTFX(DWORD tfx, const GSVector4i& r, const GSVector4i& g, const GSVector4i& b, GSVector4i* c);
	__forceinline void AlphaBlend(UINT32 abr, UINT32 tme, const GSVector4i& d, GSVector4i* c);
	__forceinline void WriteFrame(WORD* RESTRICT fb, const GSVector4i& test, const GSVector4i* c, int pixels);

	void DrawScanline(int top, int left, int right, const GSVertexSW& v);

	template<DWORD sel>
	void DrawScanlineEx(int top, int left, int right, const GSVertexSW& v);

protected:
	GPUState* m_state;
	int m_id;

public:
	GPUDrawScanline(GPUState* state, int id);
	virtual ~GPUDrawScanline();

	// IDrawScanline

	void BeginDraw(const GSRasterizerData* data, Functions* f);
	void EndDraw(const GSRasterizerStats& stats) {}
	void PrintStats() {}
};