/*
Copyright (C) 2003-2009 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"

//========================================================================
void COGLDecodedMux::Simplify(void)
{
	DecodedMux::Simplify();

}

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

void COGLExtDecodedMux::Simplify(void)
//========================================================================
{
	COGLDecodedMux::Simplify();
	FurtherFormatForOGL2();
	Reformat();		// Reformat again
}

void COGLExtDecodedMux::FurtherFormatForOGL2(void)
{
	// This function is used by OGL 1.2, no need to call this function
	// for Nvidia register combiner
	
	// And OGL 1.2 extension only supports 1 constant color, we can not use both PRIM and ENV
	// constant color, and we can not use SPECULAR color as the 2nd color.

	// To futher format the mux.
	// - For each stage, allow only 1 texel, change the 2nd texel in the same stage to MUX_SHADE
	// - Only allow 1 constant color. Count PRIM and ENV, left the most used one, and change
	//   the 2nd one to MUX_SHADE

	if( Count(MUX_PRIM) >= Count(MUX_ENV) )
	{
		ReplaceVal(MUX_ENV, MUX_PRIM);
		//ReplaceVal(MUX_ENV, MUX_SHADE);
		//ReplaceVal(MUX_ENV, MUX_1);
		//ReplaceVal(MUX_PRIM, MUX_0);
	}
	else
	{
		//ReplaceVal(MUX_PRIM, MUX_ENV);
		//ReplaceVal(MUX_PRIM, MUX_SHADE);
		ReplaceVal(MUX_PRIM, MUX_0);
	}

	/*
	// Because OGL 1.2, we may use more than 1 texture unit, but for each texture unit,
	// we can not use multitexture to do color combiner. Each combiner stage can only
	// use 1 texture.

	if( isUsed(MUX_TEXEL0) && isUsed(MUX_TEXEL1) )
	{
		if( Count(MUX_TEXEL0,0)+Count(MUX_TEXEL0,1) >= Count(MUX_TEXEL1,0)+Count(MUX_TEXEL1,1) )
		{
			ReplaceVal(MUX_TEXEL1, MUX_TEXEL0, 0);
			ReplaceVal(MUX_TEXEL1, MUX_TEXEL0, 1);
		}
		else
		{
			ReplaceVal(MUX_TEXEL0, MUX_TEXEL1, 0);
			ReplaceVal(MUX_TEXEL0, MUX_TEXEL1, 1);
		}

		if( Count(MUX_TEXEL0,2)+Count(MUX_TEXEL0,3) >= Count(MUX_TEXEL1,2)+Count(MUX_TEXEL1,3) )
		{
			ReplaceVal(MUX_TEXEL1, MUX_TEXEL0, 2);
			ReplaceVal(MUX_TEXEL1, MUX_TEXEL0, 3);
		}
		else
		{
			ReplaceVal(MUX_TEXEL0, MUX_TEXEL1, 2);
			ReplaceVal(MUX_TEXEL0, MUX_TEXEL1, 3);
		}
	}
	*/
}


void COGLExtDecodedMuxTNT2::FurtherFormatForOGL2(void)
{
	if( Count(MUX_PRIM) >= Count(MUX_ENV) )
	{
		//ReplaceVal(MUX_ENV, MUX_PRIM);
		//ReplaceVal(MUX_ENV, MUX_SHADE);
		ReplaceVal(MUX_ENV, MUX_1);
		//ReplaceVal(MUX_PRIM, MUX_0);
	}
	else
	{
		//ReplaceVal(MUX_PRIM, MUX_ENV);
		//ReplaceVal(MUX_PRIM, MUX_SHADE);
		ReplaceVal(MUX_PRIM, MUX_0);
	}
}

