Rice Video Plugin for GLES1.1

[mupen64plus-pandora.git] / source / rice_gles / src / OGLDecodedMux.cpp

diff --git a/source/rice_gles/src/OGLDecodedMux.cpp b/source/rice_gles/src/OGLDecodedMux.cpp
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+++ b/source/rice_gles/src/OGLDecodedMux.cpp
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+/*
+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 "OGLDecodedMux.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);
+    }
+}
+