source/mupen64plus-video-arachnoid/src/Combiner/AdvancedTexEnvCombiner.h

   1 /******************************************************************************
   2  * Arachnoid Graphics Plugin for Mupen64Plus
   3  * http://bitbucket.org/wahrhaft/mupen64plus-video-arachnoid/
   4  *
   5  * Copyright (C) 2007 Kristofer Karlsson, Rickard Niklasson
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  20  *****************************************************************************/
  21
  22 #ifndef ADVANCED_TEX_ENV_COMBINER_H_
  23 #define ADVANCED_TEX_ENV_COMBINER_H_
  24
  25 #include "CombinerBase.h"
  26 #include "CombinerStructs.h"
  27
  28 struct TexEnvCombiner;
  29
  30 #ifndef GL_ARB_texture_env_combine
  31 #define GL_ARB_texture_env_combine  1
  32 #ifndef HAVE_GLES
  33     #define GL_COMBINE_ARB        0x8570
  34     #define GL_COMBINE_RGB_ARB    0x8571
  35     #define GL_COMBINE_ALPHA_ARB  0x8572
  36     #define GL_SOURCE0_RGB_ARB    0x8580
  37     #define GL_SOURCE1_RGB_ARB    0x8581
  38     #define GL_SOURCE2_RGB_ARB    0x8582
  39     #define GL_SOURCE0_ALPHA_ARB  0x8588
  40     #define GL_SOURCE1_ALPHA_ARB  0x8589
  41     #define GL_SOURCE2_ALPHA_ARB  0x858A
  42     #define GL_OPERAND0_RGB_ARB   0x8590
  43     #define GL_OPERAND1_RGB_ARB   0x8591
  44     #define GL_OPERAND2_RGB_ARB   0x8592
  45     #define GL_OPERAND0_ALPHA_ARB 0x8598
  46     #define GL_OPERAND1_ALPHA_ARB 0x8599
  47     #define GL_OPERAND2_ALPHA_ARB 0x859A
  48     #define GL_RGB_SCALE_ARB      0x8573
  49     #define GL_ADD_SIGNED_ARB     0x8574
  50     #define GL_INTERPOLATE_ARB    0x8575
  51     #define GL_CONSTANT_ARB       0x8576
  52     #define GL_PRIMARY_COLOR_ARB  0x8577
  53     #define GL_PREVIOUS_ARB       0x8578
  54     #define GL_SUBTRACT_ARB       0x84E7
  55 #endif
  56 #endif
  57 #define SetColorCombinerValues( n, a, s, o ) \
  58     envCombiner->color[n].a.source = s; \
  59     envCombiner->color[n].a.operand = o
  60
  61 #define SetAlphaCombinerValues( n, a, s, o ) \
  62     envCombiner->alpha[n].a.source = s; \
  63     envCombiner->alpha[n].a.operand = o
  64
  65 #define SetAlphaCombinerArg( n, a, i ) \
  66     if (TexEnvArgs[i].source == GL_CONSTANT_ARB) \
  67     { \
  68         if ((envCombiner->alpha[n].constant == COMBINED) || (envCombiner->alpha[n].constant == i)) \
  69         { \
  70             envCombiner->alpha[n].constant = i; \
  71             envCombiner->alpha[n].a.source = GL_CONSTANT_ARB; \
  72             envCombiner->alpha[n].a.operand = GL_SRC_ALPHA; \
  73         } \
  74         else if ((envCombiner->vertex.alpha == COMBINED) || (envCombiner->vertex.alpha == i)) \
  75         { \
  76             envCombiner->vertex.alpha = i; \
  77             envCombiner->alpha[n].a.source = GL_PRIMARY_COLOR_ARB; \
  78             envCombiner->alpha[n].a.operand = GL_SRC_ALPHA; \
  79         } \
  80     } \
  81     else \
  82     { \
  83         envCombiner->alpha[n].a.source = TexEnvArgs[i].source; \
  84         envCombiner->alpha[n].a.operand = GL_SRC_ALPHA; \
  85     }
  86
  87 #define SetColorCombinerArg( n, a, i ) \
  88  if (TexEnvArgs[i].source == GL_CONSTANT_ARB) \
  89     { \
  90         if ((i > 5) && ((envCombiner->alpha[n].constant == COMBINED) || (envCombiner->alpha[n].constant == i))) \
  91         { \
  92             envCombiner->alpha[n].constant = i; \
  93             envCombiner->color[n].a.source = GL_CONSTANT_ARB; \
  94             envCombiner->color[n].a.operand = GL_SRC_ALPHA; \
  95         } \
  96         else if ((i > 5) && ((envCombiner->vertex.alpha == COMBINED) || (envCombiner->vertex.alpha == i))) \
  97         { \
  98             envCombiner->vertex.alpha = i; \
  99             envCombiner->color[n].a.source = GL_PRIMARY_COLOR_ARB; \
 100             envCombiner->color[n].a.operand = GL_SRC_ALPHA; \
 101         } \
 102         else if ((envCombiner->color[n].constant == COMBINED) || (envCombiner->color[n].constant == i)) \
 103         { \
 104             envCombiner->color[n].constant = i; \
 105             envCombiner->color[n].a.source = GL_CONSTANT_ARB; \
 106             envCombiner->color[n].a.operand = GL_SRC_COLOR; \
 107         } \
 108         else if ( ATIX_texture_env_route && ((envCombiner->vertex.secondaryColor == COMBINED) || (envCombiner->vertex.secondaryColor == i))) \
 109         { \
 110             envCombiner->vertex.secondaryColor = i; \
 111             envCombiner->color[n].a.source = GL_SECONDARY_COLOR_ATIX; \
 112             envCombiner->color[n].a.operand = GL_SRC_COLOR; \
 113         } \
 114         else if ((envCombiner->vertex.color == COMBINED) || (envCombiner->vertex.color == i))\
 115         { \
 116             envCombiner->vertex.color = i; \
 117             envCombiner->color[n].a.source = GL_PRIMARY_COLOR_ARB; \
 118             envCombiner->color[n].a.operand = GL_SRC_COLOR; \
 119         } \
 120     } \
 121     else \
 122     { \
 123         envCombiner->color[n].a.source = TexEnvArgs[i].source; \
 124         envCombiner->color[n].a.operand = TexEnvArgs[i].operand; \
 125     }
 126
 127 //*****************************************************************************
 128 //! Advanced Texture Environment Combiner
 129 //! Class used to combine colors by setting texture enviroment using OpenGL
 130 //*****************************************************************************
 131 class AdvancedTexEnvCombiner : public CombinerBase
 132 {
 133 public:
 134
 135     //Constructor / Destructor
 136     AdvancedTexEnvCombiner();
 137     ~AdvancedTexEnvCombiner();
 138
 139     //Initialize
 140     void initialize();
 141
 142     //Begin / End Texture Update
 143     void beginTextureUpdate();
 144     void endTextureUpdate(TexEnvCombiner* texEnv);
 145
 146     //Sets texture enviorment colors
 147     void setTextureEnviromentColors(TexEnvCombiner* texEnv);
 148
 149     //Create New Texture Environment
 150     TexEnvCombiner* createNewTextureEnviroment(Combiner* colorCombiner, Combiner *alphaCombiner);
 151
 152     //Sets texture enviorment
 153     void setTextureEnviroment(TexEnvCombiner* texEnv);
 154
 155 private:
 156
 157     //Extensions
 158     bool ARB_texture_env_combine;
 159     bool ARB_texture_env_crossbar;
 160     bool ATI_texture_env_combine3;
 161     bool ATIX_texture_env_route;
 162     bool NV_texture_env_combine4;
 163
 164 };
 165
 166 #endif