| 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 | #include <algorithm> |
| 23 | using std::max; |
| 24 | #include "AdvancedTexEnvCombiner.h" |
| 25 | #include "CombinerStructs.h" |
| 26 | #include "MultiTexturingExt.h" //glActiveTextureARB |
| 27 | #include "ExtensionChecker.h" |
| 28 | |
| 29 | #ifndef GL_ATI_texture_env_combine3 |
| 30 | #define GL_ATI_texture_env_combine3 |
| 31 | #define GL_ATI_texture_env_combine3 |
| 32 | #define GL_MODULATE_ADD_ATI 0x8744 |
| 33 | #define GL_MODULATE_SIGNED_ADD_ATI 0x8745 |
| 34 | #define GL_MODULATE_SUBTRACT_ATI 0x8746 |
| 35 | #endif //GL_ATI_texture_env_combine3 |
| 36 | |
| 37 | #ifndef GL_ATIX_texture_env_route |
| 38 | #define GL_ATIX_texture_env_route 1 |
| 39 | #define GL_SECONDARY_COLOR_ATIX 0x8747 |
| 40 | #define GL_TEXTURE_OUTPUT_RGB_ATIX 0x8748 |
| 41 | #define GL_TEXTURE_OUTPUT_ALPHA_ATIX 0x8749 |
| 42 | #endif // GL_ATIX_texture_env_route |
| 43 | |
| 44 | static TexEnvCombinerArg TexEnvArgs[] = |
| 45 | { |
| 46 | // CMB |
| 47 | { GL_PREVIOUS_ARB, GL_SRC_COLOR }, |
| 48 | // T0 |
| 49 | { GL_TEXTURE, GL_SRC_COLOR }, |
| 50 | // T1 |
| 51 | { GL_TEXTURE, GL_SRC_COLOR }, |
| 52 | // PRIM |
| 53 | { GL_CONSTANT_ARB, GL_SRC_COLOR }, |
| 54 | // SHADE |
| 55 | { GL_PRIMARY_COLOR_ARB, GL_SRC_COLOR }, |
| 56 | // ENV |
| 57 | { GL_CONSTANT_ARB, GL_SRC_COLOR }, |
| 58 | // CENTER |
| 59 | { GL_CONSTANT_ARB, GL_SRC_COLOR }, |
| 60 | // SCALE |
| 61 | { GL_CONSTANT_ARB, GL_SRC_COLOR }, |
| 62 | // CMBALPHA |
| 63 | { GL_PREVIOUS_ARB, GL_SRC_ALPHA }, |
| 64 | // T0ALPHA |
| 65 | { GL_TEXTURE, GL_SRC_ALPHA }, |
| 66 | // T1ALPHA |
| 67 | { GL_TEXTURE, GL_SRC_ALPHA }, |
| 68 | // PRIMALPHA |
| 69 | { GL_CONSTANT_ARB, GL_SRC_ALPHA }, |
| 70 | // SHADEALPHA |
| 71 | { GL_PRIMARY_COLOR_ARB, GL_SRC_ALPHA }, |
| 72 | // ENVALPHA |
| 73 | { GL_CONSTANT_ARB, GL_SRC_COLOR }, |
| 74 | // LODFRAC |
| 75 | { GL_CONSTANT_ARB, GL_SRC_COLOR }, |
| 76 | // PRIMLODFRAC |
| 77 | { GL_CONSTANT_ARB, GL_SRC_COLOR }, |
| 78 | // NOISE |
| 79 | { GL_TEXTURE, GL_SRC_COLOR }, |
| 80 | // K4 |
| 81 | { GL_CONSTANT_ARB, GL_SRC_COLOR }, |
| 82 | // K5 |
| 83 | { GL_CONSTANT_ARB, GL_SRC_COLOR }, |
| 84 | // ONE |
| 85 | { GL_CONSTANT_ARB, GL_SRC_COLOR }, |
| 86 | // ZERO |
| 87 | { GL_CONSTANT_ARB, GL_SRC_COLOR } |
| 88 | }; |
| 89 | |
| 90 | //----------------------------------------------------------------------------- |
| 91 | //! Constructor |
| 92 | //----------------------------------------------------------------------------- |
| 93 | AdvancedTexEnvCombiner::AdvancedTexEnvCombiner() |
| 94 | { |
| 95 | } |
| 96 | |
| 97 | //----------------------------------------------------------------------------- |
| 98 | //! Destructor |
| 99 | //----------------------------------------------------------------------------- |
| 100 | AdvancedTexEnvCombiner::~AdvancedTexEnvCombiner() |
| 101 | { |
| 102 | } |
| 103 | |
| 104 | //----------------------------------------------------------------------------- |
| 105 | //* Initialize |
| 106 | //! Checks if extensions are supported |
| 107 | //----------------------------------------------------------------------------- |
| 108 | void AdvancedTexEnvCombiner::initialize() |
| 109 | { |
| 110 | #ifdef HAVE_GLES |
| 111 | ARB_texture_env_combine = true; |
| 112 | ARB_texture_env_crossbar = true; |
| 113 | #else |
| 114 | ARB_texture_env_combine = isExtensionSupported( "GL_ARB_texture_env_combine" ); |
| 115 | ARB_texture_env_crossbar = isExtensionSupported( "GL_ARB_texture_env_crossbar" ); |
| 116 | #endif |
| 117 | ATI_texture_env_combine3 = isExtensionSupported( "GL_ATI_texture_env_combine3" ); |
| 118 | ATIX_texture_env_route = isExtensionSupported( "GL_ATIX_texture_env_route" ); |
| 119 | NV_texture_env_combine4 = isExtensionSupported( "GL_NV_texture_env_combine4" );; |
| 120 | |
| 121 | if ( ARB_texture_env_crossbar || NV_texture_env_combine4 || ATIX_texture_env_route ) |
| 122 | { |
| 123 | TexEnvArgs[TEXEL0].source = GL_TEXTURE0_ARB; |
| 124 | TexEnvArgs[TEXEL0_ALPHA].source = GL_TEXTURE0_ARB; |
| 125 | TexEnvArgs[TEXEL1].source = GL_TEXTURE1_ARB; |
| 126 | TexEnvArgs[TEXEL1_ALPHA].source = GL_TEXTURE1_ARB; |
| 127 | } |
| 128 | |
| 129 | if ( ATI_texture_env_combine3 ) |
| 130 | { |
| 131 | TexEnvArgs[ONE].source = GL_ONE; |
| 132 | TexEnvArgs[ZERO].source = GL_ZERO; |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | //----------------------------------------------------------------------------- |
| 137 | //* Begin Texture Update |
| 138 | //! Disables all textures |
| 139 | //----------------------------------------------------------------------------- |
| 140 | void AdvancedTexEnvCombiner::beginTextureUpdate() |
| 141 | { |
| 142 | const int openGLMaxTextureUnits = 8; |
| 143 | |
| 144 | //Disable all texture channels |
| 145 | for (int i = 0; i <openGLMaxTextureUnits; i++) |
| 146 | { |
| 147 | glActiveTextureARB(GL_TEXTURE0_ARB + i); |
| 148 | glDisable(GL_TEXTURE_2D ); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | |
| 153 | //----------------------------------------------------------------------------- |
| 154 | //* End Texture Update |
| 155 | //! Enables selected textures in a texture environment |
| 156 | //! @param texEnv Texture environment with textures to be enabled |
| 157 | //----------------------------------------------------------------------------- |
| 158 | void AdvancedTexEnvCombiner::endTextureUpdate(TexEnvCombiner* texEnv) |
| 159 | { |
| 160 | //Enable texturing |
| 161 | for (int i = 0; i <texEnv->usedUnits; i++) |
| 162 | { |
| 163 | glActiveTextureARB( GL_TEXTURE0_ARB + i ); |
| 164 | glEnable( GL_TEXTURE_2D ); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | //----------------------------------------------------------------------------- |
| 169 | //* Set Texture Enviroment Colors |
| 170 | //! Sets texture enviorment colors for all active textures |
| 171 | //! @param texEnv Texture environment with textures that will be assigned colors |
| 172 | //----------------------------------------------------------------------------- |
| 173 | void AdvancedTexEnvCombiner::setTextureEnviromentColors(TexEnvCombiner* texEnv) |
| 174 | { |
| 175 | float color[4]; |
| 176 | |
| 177 | int openGLMaxTextureUnits = 8; |
| 178 | |
| 179 | for (int i = 0; i < openGLMaxTextureUnits; i++) |
| 180 | { |
| 181 | this->getCombinerColor( color, texEnv->color[i].constant, texEnv->alpha[i].constant ); |
| 182 | |
| 183 | glActiveTextureARB(GL_TEXTURE0_ARB + i); |
| 184 | glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, &color[0]); |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | //----------------------------------------------------------------------------- |
| 189 | //* Set Texture Enviroment |
| 190 | //! Sets texture environment for all active textures |
| 191 | //! @param texEnv Texture environment with input data which will be |
| 192 | //! sent to OpenGL using function "glTexEnvi" using ARB extensions |
| 193 | //----------------------------------------------------------------------------- |
| 194 | void AdvancedTexEnvCombiner::setTextureEnviroment(TexEnvCombiner* texEnv) |
| 195 | { |
| 196 | const int openGLMaxTextureUnits = 8; |
| 197 | |
| 198 | for (int i=0; i<openGLMaxTextureUnits; ++i) |
| 199 | { |
| 200 | glActiveTextureARB(GL_TEXTURE0_ARB + i); |
| 201 | |
| 202 | if ( (i < texEnv->usedUnits ) || (i < 2 && texEnv->usesT1) ) |
| 203 | { |
| 204 | glEnable( GL_TEXTURE_2D ); |
| 205 | glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB ); |
| 206 | glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, texEnv->color[i].combine ); |
| 207 | glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, texEnv->color[i].arg0.source ); |
| 208 | glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, texEnv->color[i].arg0.operand ); |
| 209 | glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, texEnv->color[i].arg1.source ); |
| 210 | glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, texEnv->color[i].arg1.operand ); |
| 211 | glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, texEnv->color[i].arg2.source ); |
| 212 | glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, texEnv->color[i].arg2.operand ); |
| 213 | glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, texEnv->alpha[i].combine ); |
| 214 | glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, texEnv->alpha[i].arg0.source ); |
| 215 | glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, texEnv->alpha[i].arg0.operand ); |
| 216 | glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, texEnv->alpha[i].arg1.source ); |
| 217 | glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, texEnv->alpha[i].arg1.operand ); |
| 218 | glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, texEnv->alpha[i].arg2.source ); |
| 219 | glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, texEnv->alpha[i].arg2.operand ); |
| 220 | } |
| 221 | else |
| 222 | { |
| 223 | glDisable(GL_TEXTURE_2D); |
| 224 | } |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | //----------------------------------------------------------------------------- |
| 229 | //* Create New Texture Enviornment |
| 230 | //! Allocates a new texture enviroment |
| 231 | //! @param[in] colorCombiner How to combine and get a color |
| 232 | //! @param[in] alphaCombiner How to combine and get an alpha value |
| 233 | //! @return The texture enviroment that was created |
| 234 | //----------------------------------------------------------------------------- |
| 235 | TexEnvCombiner* AdvancedTexEnvCombiner::createNewTextureEnviroment(Combiner* colorCombiner, Combiner *alphaCombiner) |
| 236 | { |
| 237 | TexEnvCombiner* envCombiner = new TexEnvCombiner(); |
| 238 | |
| 239 | int curUnit; |
| 240 | |
| 241 | const int openGLMaxTextureUnits = 8; |
| 242 | |
| 243 | //For each texture unit |
| 244 | for (int i = 0; i < openGLMaxTextureUnits; i++) |
| 245 | { |
| 246 | envCombiner->color[i].combine = GL_REPLACE; |
| 247 | envCombiner->alpha[i].combine = GL_REPLACE; |
| 248 | |
| 249 | SetColorCombinerValues( i, arg0, GL_PREVIOUS_ARB, GL_SRC_COLOR ); |
| 250 | SetColorCombinerValues( i, arg1, GL_PREVIOUS_ARB, GL_SRC_COLOR ); |
| 251 | SetColorCombinerValues( i, arg2, GL_PREVIOUS_ARB, GL_SRC_COLOR ); |
| 252 | envCombiner->color[i].constant = COMBINED; |
| 253 | envCombiner->color[i].outputTexture = GL_TEXTURE0_ARB + i; |
| 254 | |
| 255 | SetAlphaCombinerValues( i, arg0, GL_PREVIOUS_ARB, GL_SRC_ALPHA ); |
| 256 | SetAlphaCombinerValues( i, arg1, GL_PREVIOUS_ARB, GL_SRC_ALPHA ); |
| 257 | SetAlphaCombinerValues( i, arg2, GL_PREVIOUS_ARB, GL_SRC_ALPHA ); |
| 258 | envCombiner->alpha[i].constant = COMBINED; |
| 259 | envCombiner->alpha[i].outputTexture = GL_TEXTURE0_ARB + i; |
| 260 | } |
| 261 | |
| 262 | envCombiner->usesT0 = false; |
| 263 | envCombiner->usesT1 = false; |
| 264 | |
| 265 | envCombiner->vertex.color = COMBINED; |
| 266 | envCombiner->vertex.secondaryColor = COMBINED; |
| 267 | envCombiner->vertex.alpha = COMBINED; |
| 268 | |
| 269 | curUnit = 0; |
| 270 | |
| 271 | for (int i=0; i<alphaCombiner->numStages; i++) |
| 272 | { |
| 273 | for (int j = 0; j < alphaCombiner->stage[i].numOps; j++) |
| 274 | { |
| 275 | float sb = 0.0f; |
| 276 | |
| 277 | if (alphaCombiner->stage[i].op[j].param1 == PRIMITIVE_ALPHA) |
| 278 | sb = m_primColor[3]; |
| 279 | else if (alphaCombiner->stage[i].op[j].param1 == ENV_ALPHA) |
| 280 | sb = m_envColor[3]; |
| 281 | else if (alphaCombiner->stage[i].op[j].param1 == ONE) |
| 282 | sb = 1.0f; |
| 283 | |
| 284 | if (((alphaCombiner->stage[i].numOps - j) >= 3) && |
| 285 | (alphaCombiner->stage[i].op[j].op == SUB) && |
| 286 | (alphaCombiner->stage[i].op[j+1].op == MUL) && |
| 287 | (alphaCombiner->stage[i].op[j+2].op == ADD) && |
| 288 | (sb > 0.5f) && |
| 289 | (ARB_texture_env_combine)) |
| 290 | { |
| 291 | envCombiner->usesT0 |= alphaCombiner->stage[i].op[j].param1 == TEXEL0_ALPHA; |
| 292 | envCombiner->usesT1 |= alphaCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA; |
| 293 | |
| 294 | if (alphaCombiner->stage[i].op[j].param1 == ONE) |
| 295 | { |
| 296 | SetAlphaCombinerValues( curUnit, arg0, envCombiner->alpha[curUnit].arg0.source, GL_ONE_MINUS_SRC_ALPHA ); |
| 297 | } |
| 298 | else |
| 299 | { |
| 300 | envCombiner->alpha[curUnit].combine = GL_SUBTRACT_ARB; |
| 301 | SetAlphaCombinerValues( curUnit, arg1, envCombiner->alpha[curUnit].arg0.source, GL_SRC_ALPHA ); |
| 302 | SetAlphaCombinerArg( curUnit, arg0, alphaCombiner->stage[i].op[j].param1 ); |
| 303 | |
| 304 | curUnit++; |
| 305 | } |
| 306 | |
| 307 | j++; |
| 308 | |
| 309 | envCombiner->usesT0 |= alphaCombiner->stage[i].op[j].param1 == TEXEL0_ALPHA; |
| 310 | envCombiner->usesT1 |= alphaCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA; |
| 311 | |
| 312 | envCombiner->alpha[curUnit].combine = GL_MODULATE; |
| 313 | SetAlphaCombinerArg( curUnit, arg1, alphaCombiner->stage[i].op[j].param1 ); |
| 314 | |
| 315 | curUnit++; |
| 316 | j++; |
| 317 | |
| 318 | envCombiner->usesT0 |= alphaCombiner->stage[i].op[j].param1 == TEXEL0_ALPHA; |
| 319 | envCombiner->usesT1 |= alphaCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA; |
| 320 | |
| 321 | envCombiner->alpha[curUnit].combine = GL_SUBTRACT_ARB; |
| 322 | SetAlphaCombinerArg( curUnit, arg0, alphaCombiner->stage[i].op[j].param1 ); |
| 323 | |
| 324 | curUnit++; |
| 325 | } |
| 326 | else |
| 327 | { |
| 328 | envCombiner->usesT0 |= alphaCombiner->stage[i].op[j].param1 == TEXEL0_ALPHA; |
| 329 | envCombiner->usesT1 |= alphaCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA; |
| 330 | |
| 331 | switch (alphaCombiner->stage[i].op[j].op) |
| 332 | { |
| 333 | case LOAD: |
| 334 | if (!(ARB_texture_env_crossbar || NV_texture_env_combine4) && |
| 335 | (alphaCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA) && (curUnit == 0)) |
| 336 | curUnit++; |
| 337 | |
| 338 | envCombiner->alpha[curUnit].combine = GL_REPLACE; |
| 339 | |
| 340 | SetAlphaCombinerArg( curUnit, arg0, alphaCombiner->stage[i].op[j].param1 ); |
| 341 | break; |
| 342 | case SUB: |
| 343 | if (!ARB_texture_env_combine) |
| 344 | break; |
| 345 | |
| 346 | if (!(ARB_texture_env_crossbar || NV_texture_env_combine4) && |
| 347 | (alphaCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA) && (curUnit == 0)) |
| 348 | curUnit++; |
| 349 | |
| 350 | if ((j > 0) && (alphaCombiner->stage[i].op[j-1].op == LOAD) && (alphaCombiner->stage[i].op[j-1].param1 == ONE)) |
| 351 | { |
| 352 | SetAlphaCombinerArg( curUnit, arg0, alphaCombiner->stage[i].op[j].param1 ); |
| 353 | envCombiner->alpha[curUnit].arg0.operand = GL_ONE_MINUS_SRC_ALPHA; |
| 354 | } |
| 355 | else if ((ATI_texture_env_combine3) && (curUnit > 0) && (envCombiner->alpha[curUnit - 1].combine == GL_MODULATE)) |
| 356 | { |
| 357 | curUnit--; |
| 358 | SetAlphaCombinerValues( curUnit, arg2, envCombiner->alpha[curUnit].arg1.source, envCombiner->alpha[curUnit].arg1.operand ); |
| 359 | envCombiner->alpha[curUnit].combine = GL_MODULATE_SUBTRACT_ATI; |
| 360 | SetAlphaCombinerArg( curUnit, arg1, alphaCombiner->stage[i].op[j].param1 ); |
| 361 | curUnit++; |
| 362 | } |
| 363 | else |
| 364 | { |
| 365 | envCombiner->alpha[curUnit].combine = GL_SUBTRACT_ARB; |
| 366 | SetAlphaCombinerArg( curUnit, arg1, alphaCombiner->stage[i].op[j].param1 ); |
| 367 | curUnit++; |
| 368 | } |
| 369 | break; |
| 370 | case MUL: |
| 371 | if (!( ARB_texture_env_crossbar || NV_texture_env_combine4) && |
| 372 | (alphaCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA) && (curUnit == 0)) |
| 373 | curUnit++; |
| 374 | |
| 375 | envCombiner->alpha[curUnit].combine = GL_MODULATE; |
| 376 | |
| 377 | SetAlphaCombinerArg( curUnit, arg1, alphaCombiner->stage[i].op[j].param1 ); |
| 378 | curUnit++; |
| 379 | break; |
| 380 | case ADD: |
| 381 | if (!(ARB_texture_env_crossbar || NV_texture_env_combine4) && |
| 382 | (alphaCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA) && (curUnit == 0)) |
| 383 | curUnit++; |
| 384 | |
| 385 | if ((ATI_texture_env_combine3) && (curUnit > 0) && (envCombiner->alpha[curUnit - 1].combine == GL_MODULATE)) |
| 386 | { |
| 387 | curUnit--; |
| 388 | SetAlphaCombinerValues( curUnit, arg2, envCombiner->alpha[curUnit].arg1.source, envCombiner->alpha[curUnit].arg1.operand ); |
| 389 | envCombiner->alpha[curUnit].combine = GL_MODULATE_ADD_ATI; |
| 390 | SetAlphaCombinerArg( curUnit, arg1, alphaCombiner->stage[i].op[j].param1 ); |
| 391 | } |
| 392 | else |
| 393 | { |
| 394 | envCombiner->alpha[curUnit].combine = GL_ADD; |
| 395 | SetAlphaCombinerArg( curUnit, arg1, alphaCombiner->stage[i].op[j].param1 ); |
| 396 | } |
| 397 | curUnit++; |
| 398 | break; |
| 399 | case INTERPOLATE: |
| 400 | envCombiner->usesT0 |= (alphaCombiner->stage[i].op[j].param2 == TEXEL0_ALPHA) || (alphaCombiner->stage[i].op[j].param3 == TEXEL0_ALPHA); |
| 401 | envCombiner->usesT1 |= (alphaCombiner->stage[i].op[j].param2 == TEXEL1_ALPHA) || (alphaCombiner->stage[i].op[j].param3 == TEXEL1_ALPHA); |
| 402 | |
| 403 | envCombiner->alpha[curUnit].combine = GL_INTERPOLATE_ARB; |
| 404 | |
| 405 | SetAlphaCombinerArg( curUnit, arg0, alphaCombiner->stage[i].op[j].param1 ); |
| 406 | SetAlphaCombinerArg( curUnit, arg1, alphaCombiner->stage[i].op[j].param2 ); |
| 407 | SetAlphaCombinerArg( curUnit, arg2, alphaCombiner->stage[i].op[j].param3 ); |
| 408 | |
| 409 | curUnit++; |
| 410 | break; |
| 411 | } |
| 412 | } |
| 413 | } |
| 414 | } |
| 415 | |
| 416 | envCombiner->usedUnits = max( curUnit, 1 ); |
| 417 | |
| 418 | curUnit = 0; |
| 419 | for (int i = 0; i < colorCombiner->numStages; i++) |
| 420 | { |
| 421 | for (int j = 0; j < colorCombiner->stage[i].numOps; j++) |
| 422 | { |
| 423 | float sb = 0.0f; |
| 424 | |
| 425 | if (colorCombiner->stage[i].op[j].param1 == PRIMITIVE) |
| 426 | sb = (m_primColor[0] + m_primColor[2] + m_primColor[1]) / 3.0f; |
| 427 | else if (colorCombiner->stage[i].op[j].param1 == ENVIRONMENT) |
| 428 | sb = (m_envColor[0] + m_envColor[2] + m_envColor[1]) / 3.0f; |
| 429 | |
| 430 | // This helps with problems caused by not using signed values between texture units |
| 431 | if (((colorCombiner->stage[i].numOps - j) >= 3) && |
| 432 | (colorCombiner->stage[i].op[j].op == SUB) && |
| 433 | (colorCombiner->stage[i].op[j+1].op == MUL) && |
| 434 | (colorCombiner->stage[i].op[j+2].op == ADD) && |
| 435 | (sb > 0.5f) && |
| 436 | (ARB_texture_env_combine)) |
| 437 | { |
| 438 | envCombiner->usesT0 |= ((colorCombiner->stage[i].op[j].param1 == TEXEL0) || (colorCombiner->stage[i].op[j].param1 == TEXEL0_ALPHA)); |
| 439 | envCombiner->usesT1 |= ((colorCombiner->stage[i].op[j].param1 == TEXEL1) || (colorCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA)); |
| 440 | |
| 441 | envCombiner->color[curUnit].combine = GL_SUBTRACT_ARB; |
| 442 | SetColorCombinerValues( curUnit, arg1, envCombiner->color[curUnit].arg0.source, envCombiner->color[curUnit].arg0.operand ); |
| 443 | SetColorCombinerArg( curUnit, arg0, colorCombiner->stage[i].op[j].param1 ); |
| 444 | |
| 445 | curUnit++; |
| 446 | j++; |
| 447 | |
| 448 | envCombiner->usesT0 |= ((colorCombiner->stage[i].op[j].param1 == TEXEL0) || (colorCombiner->stage[i].op[j].param1 == TEXEL0_ALPHA)); |
| 449 | envCombiner->usesT1 |= ((colorCombiner->stage[i].op[j].param1 == TEXEL1) || (colorCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA)); |
| 450 | |
| 451 | envCombiner->color[curUnit].combine = GL_MODULATE; |
| 452 | SetColorCombinerArg( curUnit, arg1, colorCombiner->stage[i].op[j].param1 ); |
| 453 | |
| 454 | curUnit++; |
| 455 | j++; |
| 456 | |
| 457 | envCombiner->usesT0 |= ((colorCombiner->stage[i].op[j].param1 == TEXEL0) || (colorCombiner->stage[i].op[j].param1 == TEXEL0_ALPHA)); |
| 458 | envCombiner->usesT1 |= ((colorCombiner->stage[i].op[j].param1 == TEXEL1) || (colorCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA)); |
| 459 | |
| 460 | envCombiner->color[curUnit].combine = GL_SUBTRACT_ARB; |
| 461 | SetColorCombinerArg( curUnit, arg0, colorCombiner->stage[i].op[j].param1 ); |
| 462 | |
| 463 | curUnit++; |
| 464 | } |
| 465 | else |
| 466 | { |
| 467 | envCombiner->usesT0 |= ((colorCombiner->stage[i].op[j].param1 == TEXEL0) || (colorCombiner->stage[i].op[j].param1 == TEXEL0_ALPHA)); |
| 468 | envCombiner->usesT1 |= ((colorCombiner->stage[i].op[j].param1 == TEXEL1) || (colorCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA)); |
| 469 | |
| 470 | switch (colorCombiner->stage[i].op[j].op) |
| 471 | { |
| 472 | case LOAD: |
| 473 | if (!( ARB_texture_env_crossbar || NV_texture_env_combine4) && |
| 474 | ((colorCombiner->stage[i].op[j].param1 == TEXEL1) || (colorCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA)) && (curUnit == 0)) |
| 475 | curUnit++; |
| 476 | |
| 477 | envCombiner->color[curUnit].combine = GL_REPLACE; |
| 478 | |
| 479 | SetColorCombinerArg( curUnit, arg0, colorCombiner->stage[i].op[j].param1 ); |
| 480 | break; |
| 481 | case SUB: |
| 482 | if (!ARB_texture_env_combine) |
| 483 | break; |
| 484 | |
| 485 | if (!(ARB_texture_env_crossbar || NV_texture_env_combine4) && |
| 486 | ((colorCombiner->stage[i].op[j].param1 == TEXEL1) || (colorCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA)) && (curUnit == 0)) |
| 487 | curUnit++; |
| 488 | |
| 489 | if ((j > 0) && (colorCombiner->stage[i].op[j-1].op == LOAD) && (colorCombiner->stage[i].op[j-1].param1 == ONE)) |
| 490 | { |
| 491 | SetColorCombinerArg( curUnit, arg0, colorCombiner->stage[i].op[j].param1 ); |
| 492 | envCombiner->color[curUnit].arg0.operand = GL_ONE_MINUS_SRC_COLOR; |
| 493 | } |
| 494 | else if (( ATI_texture_env_combine3) && (curUnit > 0) && (envCombiner->color[curUnit - 1].combine == GL_MODULATE)) |
| 495 | { |
| 496 | curUnit--; |
| 497 | SetColorCombinerValues( curUnit, arg2, envCombiner->color[curUnit].arg1.source, envCombiner->color[curUnit].arg1.operand ); |
| 498 | envCombiner->color[curUnit].combine = GL_MODULATE_SUBTRACT_ATI; |
| 499 | SetColorCombinerArg( curUnit, arg1, colorCombiner->stage[i].op[j].param1 ); |
| 500 | curUnit++; |
| 501 | } |
| 502 | else |
| 503 | { |
| 504 | envCombiner->color[curUnit].combine = GL_SUBTRACT_ARB; |
| 505 | SetColorCombinerArg( curUnit, arg1, colorCombiner->stage[i].op[j].param1 ); |
| 506 | curUnit++; |
| 507 | } |
| 508 | break; |
| 509 | case MUL: |
| 510 | if (!( ARB_texture_env_crossbar || NV_texture_env_combine4) && |
| 511 | ((colorCombiner->stage[i].op[j].param1 == TEXEL1) || (colorCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA)) && (curUnit == 0)) |
| 512 | curUnit++; |
| 513 | |
| 514 | envCombiner->color[curUnit].combine = GL_MODULATE; |
| 515 | |
| 516 | SetColorCombinerArg( curUnit, arg1, colorCombiner->stage[i].op[j].param1 ); |
| 517 | curUnit++; |
| 518 | break; |
| 519 | case ADD: |
| 520 | if (!( ARB_texture_env_crossbar || NV_texture_env_combine4) && |
| 521 | ((colorCombiner->stage[i].op[j].param1 == TEXEL1) || (colorCombiner->stage[i].op[j].param1 == TEXEL1_ALPHA)) && (curUnit == 0)) |
| 522 | curUnit++; |
| 523 | |
| 524 | // ATI_texture_env_combine3 adds GL_MODULATE_ADD_ATI; saves texture units |
| 525 | if (( ATI_texture_env_combine3) && (curUnit > 0) && (envCombiner->color[curUnit - 1].combine == GL_MODULATE)) |
| 526 | { |
| 527 | curUnit--; |
| 528 | SetColorCombinerValues( curUnit, arg2, envCombiner->color[curUnit].arg1.source, envCombiner->color[curUnit].arg1.operand ); |
| 529 | envCombiner->color[curUnit].combine = GL_MODULATE_ADD_ATI; |
| 530 | SetColorCombinerArg( curUnit, arg1, colorCombiner->stage[i].op[j].param1 ); |
| 531 | } |
| 532 | else |
| 533 | { |
| 534 | envCombiner->color[curUnit].combine = GL_ADD; |
| 535 | SetColorCombinerArg( curUnit, arg1, colorCombiner->stage[i].op[j].param1 ); |
| 536 | } |
| 537 | curUnit++; |
| 538 | break; |
| 539 | case INTERPOLATE: |
| 540 | envCombiner->usesT0 |= (colorCombiner->stage[i].op[j].param2 == TEXEL0) || (colorCombiner->stage[i].op[j].param3 == TEXEL0) || (colorCombiner->stage[i].op[j].param3 == TEXEL0_ALPHA); |
| 541 | envCombiner->usesT1 |= (colorCombiner->stage[i].op[j].param2 == TEXEL1) || (colorCombiner->stage[i].op[j].param3 == TEXEL1) || (colorCombiner->stage[i].op[j].param3 == TEXEL1_ALPHA); |
| 542 | |
| 543 | if (!( ARB_texture_env_crossbar || NV_texture_env_combine4) && |
| 544 | ((colorCombiner->stage[i].op[j].param1 == TEXEL1) || (colorCombiner->stage[i].op[j].param2 == TEXEL1) || (colorCombiner->stage[i].op[j].param3 == TEXEL1) || (colorCombiner->stage[i].op[j].param3 == TEXEL1_ALPHA)) && (curUnit == 0)) |
| 545 | { |
| 546 | if (colorCombiner->stage[i].op[j].param1 == TEXEL0) |
| 547 | { |
| 548 | envCombiner->color[curUnit].combine = GL_REPLACE; |
| 549 | SetColorCombinerArg( curUnit, arg0, colorCombiner->stage[i].op[j].param1 ); |
| 550 | colorCombiner->stage[i].op[j].param1 = COMBINED; |
| 551 | } |
| 552 | if (colorCombiner->stage[i].op[j].param2 == TEXEL0) |
| 553 | { |
| 554 | envCombiner->color[curUnit].combine = GL_REPLACE; |
| 555 | SetColorCombinerArg( curUnit, arg0, colorCombiner->stage[i].op[j].param2 ) |
| 556 | |
| 557 | colorCombiner->stage[i].op[j].param2 = COMBINED; |
| 558 | } |
| 559 | if (colorCombiner->stage[i].op[j].param3 == TEXEL0) |
| 560 | { |
| 561 | envCombiner->color[curUnit].combine = GL_REPLACE; |
| 562 | SetColorCombinerArg( curUnit, arg0, colorCombiner->stage[i].op[j].param3 ); |
| 563 | colorCombiner->stage[i].op[j].param3 = COMBINED; |
| 564 | } |
| 565 | if (colorCombiner->stage[i].op[j].param3 == TEXEL0_ALPHA) |
| 566 | { |
| 567 | envCombiner->color[curUnit].combine = GL_REPLACE; |
| 568 | SetColorCombinerArg( curUnit, arg0, colorCombiner->stage[i].op[j].param3 ); |
| 569 | colorCombiner->stage[i].op[j].param3 = COMBINED_ALPHA; |
| 570 | } |
| 571 | |
| 572 | curUnit++; |
| 573 | } |
| 574 | |
| 575 | envCombiner->color[curUnit].combine = GL_INTERPOLATE_ARB; |
| 576 | |
| 577 | SetColorCombinerArg( curUnit, arg0, colorCombiner->stage[i].op[j].param1 ); |
| 578 | SetColorCombinerArg( curUnit, arg1, colorCombiner->stage[i].op[j].param2 ); |
| 579 | SetColorCombinerArg( curUnit, arg2, colorCombiner->stage[i].op[j].param3 ); |
| 580 | |
| 581 | curUnit++; |
| 582 | break; |
| 583 | } |
| 584 | } |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | envCombiner->usedUnits = max( (unsigned short)curUnit, envCombiner->usedUnits ); |
| 589 | return envCombiner; |
| 590 | } |