/*
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.
*/

#include "stdafx.h"

//This function is called after Reformat to handel two texels in 1 cycle, D3D can not handle
//two texels in a single stage, the texels must be splited into multiple stages
void CDirectXDecodedMux::ReformatAgainWithTwoTexels(void)
{
	if( CountTexels() < 2 )
		return;

	for( int i=0; i<2; i++ )
	{
		N64CombinerType &m = m_n64Combiners[i];
		if( CountTexel1Cycle(m) < 2 )
		{
			continue;	//1st cycle does not have two texels, do nothing here
		}
		else
		{
			N64CombinerType &m2 = m_n64Combiners[i+2];
			
			if( splitType[i] == CM_FMT_TYPE_A_MOD_C )	//Texel0*Texel1
			{
				if( splitType[i+2] == CM_FMT_TYPE_NOT_USED )
				{
					//Change Texel1*Texel0 to (SEL(tex1), MOD(tex0))
					m.d = m.a;
					m.a = MUX_0;
					m2.a = m.c;
					m2.c = MUX_COMBINED;
					m2.d = m2.b = MUX_0;
					m.c = MUX_0;
					splitType[i+2] = CM_FMT_TYPE_A_MOD_C;
					splitType[i] = CM_FMT_TYPE_D;
				}
				else if( splitType[i+2] == CM_FMT_TYPE_A_MOD_C )
				{
					if( m2.a == MUX_COMBINED )
					{
						swap(m2.a, m2.c);
					}

					if( m2.a != MUX_TEXEL0 && m2.a != MUX_TEXEL1 )
					{
						//cool, we can swap m2.a to cycle1 and swap texel from cycle 1 to cycle 2
						swap(m.a, m2.a);
					}
					else
					{
						if( m.a == m2.a )
						{
							swap(m.c, m2.a);
						}
						else
						{
							swap(m.a, m2.a);
						}
					}
				}
				else if( splitType[i+2] == CM_FMT_TYPE_A_MOD_C_ADD_D )
				{
					if( m2.a == MUX_COMBINED )
					{
						swap(m2.a, m2.c);
					}

					if( m2.c == MUX_COMBINED && m2.d != MUX_COMBINED )
					{
						//Cycle1: texel0*texel1
						//Cycle2: a*cmd+d
						if( m2.a != MUX_TEXEL0 && m2.a != MUX_TEXEL1 )
						{
							//cool, we can swap m2.a to cycle1 and swap texel from cycle 1 to cycle 2
							swap(m.a, m2.a);
						}
						else
						{
							if( m.a == m2.a )
							{
								swap(m.c, m2.a);
							}
							else
							{
								swap(m.a, m2.a);
							}
						}
					}
				}
				else if( splitType[i] == CM_FMT_TYPE_A_ADD_D )	//Texel0+Texel1
				{
					if( splitType[i+2] == CM_FMT_TYPE_NOT_USED )
					{
						//Change Texel1*Texel0 to (SEL(tex1), MOD(tex0))
						m2.a = m.d;
						m2.d = MUX_COMBINED;
						m2.b = m2.c = MUX_0;
						m.d = m.a;
						m.a = MUX_0;
						splitType[i+2] = CM_FMT_TYPE_A_ADD_D;
						splitType[i] = CM_FMT_TYPE_D;
					}
					else if( splitType[i+2] == CM_FMT_TYPE_A_ADD_D )
					{
						if( m2.a == MUX_COMBINED )
						{
							swap(m2.a, m2.d);
						}

						if( m2.a != MUX_TEXEL0 && m2.a != MUX_TEXEL1 )
						{
							swap(m2.a, m.a);
						}
						else
						{
							if( m.a == m2.a )
							{
								swap(m.d, m2.a);
							}
							else
							{
								swap(m.a, m2.a);
							}
						}
					}
				}

			}

			if( CountTexel1Cycle(m2) < 2 )
			{
				continue;	//2nd cycle does not have two texels
			}
		}


	}
}

void CDirectXDecodedMux::Reformat(void)
{
	DecodedMux::Reformat();
	ReformatAgainWithTwoTexels();
	mType = max(max(max(splitType[0], splitType[1]),splitType[2]),splitType[3]);
}


