// 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 GCOGL_VERTEXSHADER_H
#define GCOGL_VERTEXSHADER_H

#include "XFMemory.h"

#define SHADER_POSMTX_ATTRIB 1
#define SHADER_NORM1_ATTRIB  6
#define SHADER_NORM2_ATTRIB  7


// shader variables
#define I_POSNORMALMATRIX       "cpnmtx"
#define I_PROJECTION            "cproj"
#define I_MATERIALS             "cmtrl"
#define I_LIGHTS                "clights"
#define I_TEXMATRICES           "ctexmtx"
#define I_TRANSFORMMATRICES     "ctrmtx"
#define I_NORMALMATRICES        "cnmtx"
#define I_POSTTRANSFORMMATRICES "cpostmtx"
#define I_FOGPARAMS             "cfog"

#define C_POSNORMALMATRIX        0
#define C_PROJECTION            (C_POSNORMALMATRIX + 6)
#define C_MATERIALS             (C_PROJECTION + 4)
#define C_LIGHTS                (C_MATERIALS + 4)
#define C_TEXMATRICES           (C_LIGHTS + 40)
#define C_TRANSFORMMATRICES     (C_TEXMATRICES + 24)
#define C_NORMALMATRICES        (C_TRANSFORMMATRICES + 64)
#define C_POSTTRANSFORMMATRICES (C_NORMALMATRICES + 32)
#define C_FOGPARAMS             (C_POSTTRANSFORMMATRICES + 64)


class VERTEXSHADERUID
{
public:
	u32 values[9];

	VERTEXSHADERUID()
	{
		memset(values, 0, sizeof(values));		
	}

	VERTEXSHADERUID(const VERTEXSHADERUID& r)
	{
		for (size_t i = 0; i < sizeof(values) / sizeof(u32); ++i) 
			values[i] = r.values[i]; 
	}

	int GetNumValues() const 
	{
		return (((values[0] >> 23) & 0xf) * 3 + 3) / 4 + 3; // numTexGens*3/4+1
	}

	bool operator <(const VERTEXSHADERUID& _Right) const
	{
		if (values[0] < _Right.values[0])
			return true;
		else if (values[0] > _Right.values[0])
			return false;
		int N = GetNumValues();
		for (int i = 1; i < N; ++i) 
		{
			if (values[i] < _Right.values[i])
				return true;
			else if (values[i] > _Right.values[i])
				return false;
		}
		return false;
	}

	bool operator ==(const VERTEXSHADERUID& _Right) const
	{
		if (values[0] != _Right.values[0])
			return false;
		int N = GetNumValues();
		for (int i = 1; i < N; ++i)
		{
			if (values[i] != _Right.values[i])
				return false;
		}
		return true;
	}
};

const char *GenerateVertexShader(u32 components);
void GetVertexShaderId(VERTEXSHADERUID& vid, u32 components);

#endif // GCOGL_VERTEXSHADER_H