--- /dev/null
+/******************************************************************************
+ * Arachnoid Graphics Plugin for Mupen64Plus
+ * http://bitbucket.org/wahrhaft/mupen64plus-video-arachnoid/
+ *
+ * Copyright (C) 2007 Kristofer Karlsson, Rickard Niklasson
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifndef COMBINER_STRUCTS_H_
+#define COMBINER_STRUCTS_H_
+
+#include "m64p.h"
+#include "OpenGL.h"
+
+// Internal combiner commands
+#define LOAD 0
+#define SUB 1
+#define MUL 2
+#define ADD 3
+#define INTERPOLATE 4
+
+// Internal generalized combiner inputs
+
+#define COMBINED 0
+#define TEXEL0 1
+#define TEXEL1 2
+#define PRIMITIVE 3
+#define SHADE 4
+#define ENVIRONMENT 5
+#define CENTER 6
+#define SCALE 7
+#define COMBINED_ALPHA 8
+#define TEXEL0_ALPHA 9
+#define TEXEL1_ALPHA 10
+#define PRIMITIVE_ALPHA 11
+#define SHADE_ALPHA 12
+#define ENV_ALPHA 13
+#define LOD_FRACTION 14
+#define PRIM_LOD_FRAC 15
+#define NOISE 16
+#define K4 17
+#define K5 18
+#define ONE 19
+#define ZERO 20
+
+//* Combiner data
+//! Defines how mux-values are coded.
+//TODO: check this size against GCC when i'm awake
+struct CombineData
+{
+ union
+ {
+ struct
+ {
+ // muxs1
+ unsigned aA1 : 3;
+ unsigned sbA1 : 3;
+ unsigned aRGB1 : 3;
+ unsigned aA0 : 3;
+ unsigned sbA0 : 3;
+ unsigned aRGB0 : 3;
+ unsigned mA1 : 3;
+ unsigned saA1 : 3;
+ unsigned sbRGB1 : 4;
+ unsigned sbRGB0 : 4;
+
+ // muxs0
+ unsigned mRGB1 : 5;
+ unsigned saRGB1 : 4;
+ unsigned mA0 : 3;
+ unsigned saA0 : 3;
+ unsigned mRGB0 : 5;
+ unsigned saRGB0 : 4;
+ };
+
+ struct
+ {
+ unsigned int muxs1, muxs0;
+ };
+
+ unsigned long long mux;
+ };
+};
+
+//! Combiner operation
+struct CombinerOp
+{
+ int op;
+ int param1;
+ int param2;
+ int param3;
+};
+
+//! Combiner Stage with combiner operations
+struct CombinerStage
+{
+ int numOps;
+ CombinerOp op[6];
+};
+
+//! Combiner with combiner stages
+struct Combiner
+{
+ int numStages;
+ CombinerStage stage[2];
+};
+
+//! Combiner cycle
+struct CombineCycle
+{
+ int loadValue; //!< Load
+ int addValue; //!< Addition
+ int subValue; //!< Subract
+ int multValue; //!< Multiplication
+};
+
+
+//*****************************************************************************
+//! Texture Environment Combiner Argument
+//! Difines a color source and mathimatical operation to be performed
+//*****************************************************************************
+struct TexEnvCombinerArg
+{
+ GLenum source;
+ GLenum operand;
+};
+
+//*****************************************************************************
+//! Texture Environment Combiner Stage
+//*****************************************************************************
+struct TexEnvCombinerStage
+{
+ unsigned short constant;
+ bool used;
+ GLenum combine;
+ TexEnvCombinerArg arg0, arg1, arg2;
+ unsigned short outputTexture;
+};
+
+//*****************************************************************************
+//* Texture Environment Combiner
+//! Stores information how graphics API should combine colors and set
+//! Texture environment.
+//*****************************************************************************
+struct TexEnvCombiner
+{
+ bool usesT0, usesT1, usesNoise;
+
+ GLint mode;
+
+ unsigned short usedUnits;
+
+ struct
+ {
+ unsigned short color, secondaryColor, alpha;
+ } vertex;
+
+ TexEnvCombinerStage color[8];
+ TexEnvCombinerStage alpha[8];
+};
+
+#endif