1 // 2 // Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved. 3 // Use of this source code is governed by a BSD-style license that can be 4 // found in the LICENSE file. 5 // 6 7 // 8 // Create strings that declare built-in definitions, add built-ins that 9 // cannot be expressed in the files, and establish mappings between 10 // built-in functions and operators. 11 // 12 13 #include "compiler/Initialize.h" 14 15 #include "compiler/intermediate.h" 16 17 void InsertBuiltInFunctions(ShShaderType type, ShShaderSpec spec, const ShBuiltInResources &resources, TSymbolTable &symbolTable) 18 { 19 TType *float1 = new TType(EbtFloat, EbpUndefined, EvqGlobal, 1); 20 TType *float2 = new TType(EbtFloat, EbpUndefined, EvqGlobal, 2); 21 TType *float3 = new TType(EbtFloat, EbpUndefined, EvqGlobal, 3); 22 TType *float4 = new TType(EbtFloat, EbpUndefined, EvqGlobal, 4); 23 24 TType *int2 = new TType(EbtInt, EbpUndefined, EvqGlobal, 2); 25 TType *int3 = new TType(EbtInt, EbpUndefined, EvqGlobal, 3); 26 TType *int4 = new TType(EbtInt, EbpUndefined, EvqGlobal, 4); 27 28 // 29 // Angle and Trigonometric Functions. 30 // 31 symbolTable.insertBuiltIn(float1, "radians", float1); 32 symbolTable.insertBuiltIn(float2, "radians", float2); 33 symbolTable.insertBuiltIn(float3, "radians", float3); 34 symbolTable.insertBuiltIn(float4, "radians", float4); 35 36 symbolTable.insertBuiltIn(float1, "degrees", float1); 37 symbolTable.insertBuiltIn(float2, "degrees", float2); 38 symbolTable.insertBuiltIn(float3, "degrees", float3); 39 symbolTable.insertBuiltIn(float4, "degrees", float4); 40 41 symbolTable.insertBuiltIn(float1, "sin", float1); 42 symbolTable.insertBuiltIn(float2, "sin", float2); 43 symbolTable.insertBuiltIn(float3, "sin", float3); 44 symbolTable.insertBuiltIn(float4, "sin", float4); 45 46 symbolTable.insertBuiltIn(float1, "cos", float1); 47 symbolTable.insertBuiltIn(float2, "cos", float2); 48 symbolTable.insertBuiltIn(float3, "cos", float3); 49 symbolTable.insertBuiltIn(float4, "cos", float4); 50 51 symbolTable.insertBuiltIn(float1, "tan", float1); 52 symbolTable.insertBuiltIn(float2, "tan", float2); 53 symbolTable.insertBuiltIn(float3, "tan", float3); 54 symbolTable.insertBuiltIn(float4, "tan", float4); 55 56 symbolTable.insertBuiltIn(float1, "asin", float1); 57 symbolTable.insertBuiltIn(float2, "asin", float2); 58 symbolTable.insertBuiltIn(float3, "asin", float3); 59 symbolTable.insertBuiltIn(float4, "asin", float4); 60 61 symbolTable.insertBuiltIn(float1, "acos", float1); 62 symbolTable.insertBuiltIn(float2, "acos", float2); 63 symbolTable.insertBuiltIn(float3, "acos", float3); 64 symbolTable.insertBuiltIn(float4, "acos", float4); 65 66 symbolTable.insertBuiltIn(float1, "atan", float1, float1); 67 symbolTable.insertBuiltIn(float2, "atan", float2, float2); 68 symbolTable.insertBuiltIn(float3, "atan", float3, float3); 69 symbolTable.insertBuiltIn(float4, "atan", float4, float4); 70 71 symbolTable.insertBuiltIn(float1, "atan", float1); 72 symbolTable.insertBuiltIn(float2, "atan", float2); 73 symbolTable.insertBuiltIn(float3, "atan", float3); 74 symbolTable.insertBuiltIn(float4, "atan", float4); 75 76 // 77 // Exponential Functions. 78 // 79 symbolTable.insertBuiltIn(float1, "pow", float1, float1); 80 symbolTable.insertBuiltIn(float2, "pow", float2, float2); 81 symbolTable.insertBuiltIn(float3, "pow", float3, float3); 82 symbolTable.insertBuiltIn(float4, "pow", float4, float4); 83 84 symbolTable.insertBuiltIn(float1, "exp", float1); 85 symbolTable.insertBuiltIn(float2, "exp", float2); 86 symbolTable.insertBuiltIn(float3, "exp", float3); 87 symbolTable.insertBuiltIn(float4, "exp", float4); 88 89 symbolTable.insertBuiltIn(float1, "log", float1); 90 symbolTable.insertBuiltIn(float2, "log", float2); 91 symbolTable.insertBuiltIn(float3, "log", float3); 92 symbolTable.insertBuiltIn(float4, "log", float4); 93 94 symbolTable.insertBuiltIn(float1, "exp2", float1); 95 symbolTable.insertBuiltIn(float2, "exp2", float2); 96 symbolTable.insertBuiltIn(float3, "exp2", float3); 97 symbolTable.insertBuiltIn(float4, "exp2", float4); 98 99 symbolTable.insertBuiltIn(float1, "log2", float1); 100 symbolTable.insertBuiltIn(float2, "log2", float2); 101 symbolTable.insertBuiltIn(float3, "log2", float3); 102 symbolTable.insertBuiltIn(float4, "log2", float4); 103 104 symbolTable.insertBuiltIn(float1, "sqrt", float1); 105 symbolTable.insertBuiltIn(float2, "sqrt", float2); 106 symbolTable.insertBuiltIn(float3, "sqrt", float3); 107 symbolTable.insertBuiltIn(float4, "sqrt", float4); 108 109 symbolTable.insertBuiltIn(float1, "inversesqrt", float1); 110 symbolTable.insertBuiltIn(float2, "inversesqrt", float2); 111 symbolTable.insertBuiltIn(float3, "inversesqrt", float3); 112 symbolTable.insertBuiltIn(float4, "inversesqrt", float4); 113 114 // 115 // Common Functions. 116 // 117 symbolTable.insertBuiltIn(float1, "abs", float1); 118 symbolTable.insertBuiltIn(float2, "abs", float2); 119 symbolTable.insertBuiltIn(float3, "abs", float3); 120 symbolTable.insertBuiltIn(float4, "abs", float4); 121 122 symbolTable.insertBuiltIn(float1, "sign", float1); 123 symbolTable.insertBuiltIn(float2, "sign", float2); 124 symbolTable.insertBuiltIn(float3, "sign", float3); 125 symbolTable.insertBuiltIn(float4, "sign", float4); 126 127 symbolTable.insertBuiltIn(float1, "floor", float1); 128 symbolTable.insertBuiltIn(float2, "floor", float2); 129 symbolTable.insertBuiltIn(float3, "floor", float3); 130 symbolTable.insertBuiltIn(float4, "floor", float4); 131 132 symbolTable.insertBuiltIn(float1, "ceil", float1); 133 symbolTable.insertBuiltIn(float2, "ceil", float2); 134 symbolTable.insertBuiltIn(float3, "ceil", float3); 135 symbolTable.insertBuiltIn(float4, "ceil", float4); 136 137 symbolTable.insertBuiltIn(float1, "fract", float1); 138 symbolTable.insertBuiltIn(float2, "fract", float2); 139 symbolTable.insertBuiltIn(float3, "fract", float3); 140 symbolTable.insertBuiltIn(float4, "fract", float4); 141 142 symbolTable.insertBuiltIn(float1, "mod", float1, float1); 143 symbolTable.insertBuiltIn(float2, "mod", float2, float1); 144 symbolTable.insertBuiltIn(float3, "mod", float3, float1); 145 symbolTable.insertBuiltIn(float4, "mod", float4, float1); 146 symbolTable.insertBuiltIn(float2, "mod", float2, float2); 147 symbolTable.insertBuiltIn(float3, "mod", float3, float3); 148 symbolTable.insertBuiltIn(float4, "mod", float4, float4); 149 150 symbolTable.insertBuiltIn(float1, "min", float1, float1); 151 symbolTable.insertBuiltIn(float2, "min", float2, float1); 152 symbolTable.insertBuiltIn(float3, "min", float3, float1); 153 symbolTable.insertBuiltIn(float4, "min", float4, float1); 154 symbolTable.insertBuiltIn(float2, "min", float2, float2); 155 symbolTable.insertBuiltIn(float3, "min", float3, float3); 156 symbolTable.insertBuiltIn(float4, "min", float4, float4); 157 158 symbolTable.insertBuiltIn(float1, "max", float1, float1); 159 symbolTable.insertBuiltIn(float2, "max", float2, float1); 160 symbolTable.insertBuiltIn(float3, "max", float3, float1); 161 symbolTable.insertBuiltIn(float4, "max", float4, float1); 162 symbolTable.insertBuiltIn(float2, "max", float2, float2); 163 symbolTable.insertBuiltIn(float3, "max", float3, float3); 164 symbolTable.insertBuiltIn(float4, "max", float4, float4); 165 166 symbolTable.insertBuiltIn(float1, "clamp", float1, float1, float1); 167 symbolTable.insertBuiltIn(float2, "clamp", float2, float1, float1); 168 symbolTable.insertBuiltIn(float3, "clamp", float3, float1, float1); 169 symbolTable.insertBuiltIn(float4, "clamp", float4, float1, float1); 170 symbolTable.insertBuiltIn(float2, "clamp", float2, float2, float2); 171 symbolTable.insertBuiltIn(float3, "clamp", float3, float3, float3); 172 symbolTable.insertBuiltIn(float4, "clamp", float4, float4, float4); 173 174 symbolTable.insertBuiltIn(float1, "mix", float1, float1, float1); 175 symbolTable.insertBuiltIn(float2, "mix", float2, float2, float1); 176 symbolTable.insertBuiltIn(float3, "mix", float3, float3, float1); 177 symbolTable.insertBuiltIn(float4, "mix", float4, float4, float1); 178 symbolTable.insertBuiltIn(float2, "mix", float2, float2, float2); 179 symbolTable.insertBuiltIn(float3, "mix", float3, float3, float3); 180 symbolTable.insertBuiltIn(float4, "mix", float4, float4, float4); 181 182 symbolTable.insertBuiltIn(float1, "step", float1, float1); 183 symbolTable.insertBuiltIn(float2, "step", float2, float2); 184 symbolTable.insertBuiltIn(float3, "step", float3, float3); 185 symbolTable.insertBuiltIn(float4, "step", float4, float4); 186 symbolTable.insertBuiltIn(float2, "step", float1, float2); 187 symbolTable.insertBuiltIn(float3, "step", float1, float3); 188 symbolTable.insertBuiltIn(float4, "step", float1, float4); 189 190 symbolTable.insertBuiltIn(float1, "smoothstep", float1, float1, float1); 191 symbolTable.insertBuiltIn(float2, "smoothstep", float2, float2, float2); 192 symbolTable.insertBuiltIn(float3, "smoothstep", float3, float3, float3); 193 symbolTable.insertBuiltIn(float4, "smoothstep", float4, float4, float4); 194 symbolTable.insertBuiltIn(float2, "smoothstep", float1, float1, float2); 195 symbolTable.insertBuiltIn(float3, "smoothstep", float1, float1, float3); 196 symbolTable.insertBuiltIn(float4, "smoothstep", float1, float1, float4); 197 198 // 199 // Geometric Functions. 200 // 201 symbolTable.insertBuiltIn(float1, "length", float1); 202 symbolTable.insertBuiltIn(float1, "length", float2); 203 symbolTable.insertBuiltIn(float1, "length", float3); 204 symbolTable.insertBuiltIn(float1, "length", float4); 205 206 symbolTable.insertBuiltIn(float1, "distance", float1, float1); 207 symbolTable.insertBuiltIn(float1, "distance", float2, float2); 208 symbolTable.insertBuiltIn(float1, "distance", float3, float3); 209 symbolTable.insertBuiltIn(float1, "distance", float4, float4); 210 211 symbolTable.insertBuiltIn(float1, "dot", float1, float1); 212 symbolTable.insertBuiltIn(float1, "dot", float2, float2); 213 symbolTable.insertBuiltIn(float1, "dot", float3, float3); 214 symbolTable.insertBuiltIn(float1, "dot", float4, float4); 215 216 symbolTable.insertBuiltIn(float3, "cross", float3, float3); 217 symbolTable.insertBuiltIn(float1, "normalize", float1); 218 symbolTable.insertBuiltIn(float2, "normalize", float2); 219 symbolTable.insertBuiltIn(float3, "normalize", float3); 220 symbolTable.insertBuiltIn(float4, "normalize", float4); 221 222 symbolTable.insertBuiltIn(float1, "faceforward", float1, float1, float1); 223 symbolTable.insertBuiltIn(float2, "faceforward", float2, float2, float2); 224 symbolTable.insertBuiltIn(float3, "faceforward", float3, float3, float3); 225 symbolTable.insertBuiltIn(float4, "faceforward", float4, float4, float4); 226 227 symbolTable.insertBuiltIn(float1, "reflect", float1, float1); 228 symbolTable.insertBuiltIn(float2, "reflect", float2, float2); 229 symbolTable.insertBuiltIn(float3, "reflect", float3, float3); 230 symbolTable.insertBuiltIn(float4, "reflect", float4, float4); 231 232 symbolTable.insertBuiltIn(float1, "refract", float1, float1, float1); 233 symbolTable.insertBuiltIn(float2, "refract", float2, float2, float1); 234 symbolTable.insertBuiltIn(float3, "refract", float3, float3, float1); 235 symbolTable.insertBuiltIn(float4, "refract", float4, float4, float1); 236 237 TType *mat2 = new TType(EbtFloat, EbpUndefined, EvqGlobal, 2, true); 238 TType *mat3 = new TType(EbtFloat, EbpUndefined, EvqGlobal, 3, true); 239 TType *mat4 = new TType(EbtFloat, EbpUndefined, EvqGlobal, 4, true); 240 241 // 242 // Matrix Functions. 243 // 244 symbolTable.insertBuiltIn(mat2, "matrixCompMult", mat2, mat2); 245 symbolTable.insertBuiltIn(mat3, "matrixCompMult", mat3, mat3); 246 symbolTable.insertBuiltIn(mat4, "matrixCompMult", mat4, mat4); 247 248 TType *bool1 = new TType(EbtBool, EbpUndefined, EvqGlobal, 1); 249 TType *bool2 = new TType(EbtBool, EbpUndefined, EvqGlobal, 2); 250 TType *bool3 = new TType(EbtBool, EbpUndefined, EvqGlobal, 3); 251 TType *bool4 = new TType(EbtBool, EbpUndefined, EvqGlobal, 4); 252 253 // 254 // Vector relational functions. 255 // 256 symbolTable.insertBuiltIn(bool2, "lessThan", float2, float2); 257 symbolTable.insertBuiltIn(bool3, "lessThan", float3, float3); 258 symbolTable.insertBuiltIn(bool4, "lessThan", float4, float4); 259 260 symbolTable.insertBuiltIn(bool2, "lessThan", int2, int2); 261 symbolTable.insertBuiltIn(bool3, "lessThan", int3, int3); 262 symbolTable.insertBuiltIn(bool4, "lessThan", int4, int4); 263 264 symbolTable.insertBuiltIn(bool2, "lessThanEqual", float2, float2); 265 symbolTable.insertBuiltIn(bool3, "lessThanEqual", float3, float3); 266 symbolTable.insertBuiltIn(bool4, "lessThanEqual", float4, float4); 267 268 symbolTable.insertBuiltIn(bool2, "lessThanEqual", int2, int2); 269 symbolTable.insertBuiltIn(bool3, "lessThanEqual", int3, int3); 270 symbolTable.insertBuiltIn(bool4, "lessThanEqual", int4, int4); 271 272 symbolTable.insertBuiltIn(bool2, "greaterThan", float2, float2); 273 symbolTable.insertBuiltIn(bool3, "greaterThan", float3, float3); 274 symbolTable.insertBuiltIn(bool4, "greaterThan", float4, float4); 275 276 symbolTable.insertBuiltIn(bool2, "greaterThan", int2, int2); 277 symbolTable.insertBuiltIn(bool3, "greaterThan", int3, int3); 278 symbolTable.insertBuiltIn(bool4, "greaterThan", int4, int4); 279 280 symbolTable.insertBuiltIn(bool2, "greaterThanEqual", float2, float2); 281 symbolTable.insertBuiltIn(bool3, "greaterThanEqual", float3, float3); 282 symbolTable.insertBuiltIn(bool4, "greaterThanEqual", float4, float4); 283 284 symbolTable.insertBuiltIn(bool2, "greaterThanEqual", int2, int2); 285 symbolTable.insertBuiltIn(bool3, "greaterThanEqual", int3, int3); 286 symbolTable.insertBuiltIn(bool4, "greaterThanEqual", int4, int4); 287 288 symbolTable.insertBuiltIn(bool2, "equal", float2, float2); 289 symbolTable.insertBuiltIn(bool3, "equal", float3, float3); 290 symbolTable.insertBuiltIn(bool4, "equal", float4, float4); 291 292 symbolTable.insertBuiltIn(bool2, "equal", int2, int2); 293 symbolTable.insertBuiltIn(bool3, "equal", int3, int3); 294 symbolTable.insertBuiltIn(bool4, "equal", int4, int4); 295 296 symbolTable.insertBuiltIn(bool2, "equal", bool2, bool2); 297 symbolTable.insertBuiltIn(bool3, "equal", bool3, bool3); 298 symbolTable.insertBuiltIn(bool4, "equal", bool4, bool4); 299 300 symbolTable.insertBuiltIn(bool2, "notEqual", float2, float2); 301 symbolTable.insertBuiltIn(bool3, "notEqual", float3, float3); 302 symbolTable.insertBuiltIn(bool4, "notEqual", float4, float4); 303 304 symbolTable.insertBuiltIn(bool2, "notEqual", int2, int2); 305 symbolTable.insertBuiltIn(bool3, "notEqual", int3, int3); 306 symbolTable.insertBuiltIn(bool4, "notEqual", int4, int4); 307 308 symbolTable.insertBuiltIn(bool2, "notEqual", bool2, bool2); 309 symbolTable.insertBuiltIn(bool3, "notEqual", bool3, bool3); 310 symbolTable.insertBuiltIn(bool4, "notEqual", bool4, bool4); 311 312 symbolTable.insertBuiltIn(bool1, "any", bool2); 313 symbolTable.insertBuiltIn(bool1, "any", bool3); 314 symbolTable.insertBuiltIn(bool1, "any", bool4); 315 316 symbolTable.insertBuiltIn(bool1, "all", bool2); 317 symbolTable.insertBuiltIn(bool1, "all", bool3); 318 symbolTable.insertBuiltIn(bool1, "all", bool4); 319 320 symbolTable.insertBuiltIn(bool2, "not", bool2); 321 symbolTable.insertBuiltIn(bool3, "not", bool3); 322 symbolTable.insertBuiltIn(bool4, "not", bool4); 323 324 TType *sampler2D = new TType(EbtSampler2D, EbpUndefined, EvqGlobal, 1); 325 TType *samplerCube = new TType(EbtSamplerCube, EbpUndefined, EvqGlobal, 1); 326 327 // 328 // Texture Functions for GLSL ES 1.0 329 // 330 symbolTable.insertBuiltIn(float4, "texture2D", sampler2D, float2); 331 symbolTable.insertBuiltIn(float4, "texture2DProj", sampler2D, float3); 332 symbolTable.insertBuiltIn(float4, "texture2DProj", sampler2D, float4); 333 symbolTable.insertBuiltIn(float4, "textureCube", samplerCube, float3); 334 335 if (resources.OES_EGL_image_external) 336 { 337 TType *samplerExternalOES = new TType(EbtSamplerExternalOES, EbpUndefined, EvqGlobal, 1); 338 339 symbolTable.insertBuiltIn(float4, "texture2D", samplerExternalOES, float2); 340 symbolTable.insertBuiltIn(float4, "texture2DProj", samplerExternalOES, float3); 341 symbolTable.insertBuiltIn(float4, "texture2DProj", samplerExternalOES, float4); 342 } 343 344 if (resources.ARB_texture_rectangle) 345 { 346 TType *sampler2DRect = new TType(EbtSampler2DRect, EbpUndefined, EvqGlobal, 1); 347 348 symbolTable.insertBuiltIn(float4, "texture2DRect", sampler2DRect, float2); 349 symbolTable.insertBuiltIn(float4, "texture2DRectProj", sampler2DRect, float3); 350 symbolTable.insertBuiltIn(float4, "texture2DRectProj", sampler2DRect, float4); 351 } 352 353 if (type == SH_FRAGMENT_SHADER) 354 { 355 symbolTable.insertBuiltIn(float4, "texture2D", sampler2D, float2, float1); 356 symbolTable.insertBuiltIn(float4, "texture2DProj", sampler2D, float3, float1); 357 symbolTable.insertBuiltIn(float4, "texture2DProj", sampler2D, float4, float1); 358 symbolTable.insertBuiltIn(float4, "textureCube", samplerCube, float3, float1); 359 360 if (resources.OES_standard_derivatives) 361 { 362 symbolTable.insertBuiltIn(float1, "dFdx", float1); 363 symbolTable.insertBuiltIn(float2, "dFdx", float2); 364 symbolTable.insertBuiltIn(float3, "dFdx", float3); 365 symbolTable.insertBuiltIn(float4, "dFdx", float4); 366 367 symbolTable.insertBuiltIn(float1, "dFdy", float1); 368 symbolTable.insertBuiltIn(float2, "dFdy", float2); 369 symbolTable.insertBuiltIn(float3, "dFdy", float3); 370 symbolTable.insertBuiltIn(float4, "dFdy", float4); 371 372 symbolTable.insertBuiltIn(float1, "fwidth", float1); 373 symbolTable.insertBuiltIn(float2, "fwidth", float2); 374 symbolTable.insertBuiltIn(float3, "fwidth", float3); 375 symbolTable.insertBuiltIn(float4, "fwidth", float4); 376 } 377 } 378 379 if(type == SH_VERTEX_SHADER) 380 { 381 symbolTable.insertBuiltIn(float4, "texture2DLod", sampler2D, float2, float1); 382 symbolTable.insertBuiltIn(float4, "texture2DProjLod", sampler2D, float3, float1); 383 symbolTable.insertBuiltIn(float4, "texture2DProjLod", sampler2D, float4, float1); 384 symbolTable.insertBuiltIn(float4, "textureCubeLod", samplerCube, float3, float1); 385 } 386 387 // 388 // Depth range in window coordinates 389 // 390 TFieldList *fields = NewPoolTFieldList(); 391 TField *near = new TField(new TType(EbtFloat, EbpHigh, EvqGlobal, 1), NewPoolTString("near")); 392 TField *far = new TField(new TType(EbtFloat, EbpHigh, EvqGlobal, 1), NewPoolTString("far")); 393 TField *diff = new TField(new TType(EbtFloat, EbpHigh, EvqGlobal, 1), NewPoolTString("diff")); 394 fields->push_back(near); 395 fields->push_back(far); 396 fields->push_back(diff); 397 TStructure *depthRangeStruct = new TStructure(NewPoolTString("gl_DepthRangeParameters"), fields); 398 TVariable *depthRangeParameters = new TVariable(&depthRangeStruct->name(), depthRangeStruct, true); 399 symbolTable.insert(*depthRangeParameters); 400 TVariable *depthRange = new TVariable(NewPoolTString("gl_DepthRange"), TType(depthRangeStruct)); 401 depthRange->setQualifier(EvqUniform); 402 symbolTable.insert(*depthRange); 403 404 // 405 // Implementation dependent built-in constants. 406 // 407 symbolTable.insertConstInt("gl_MaxVertexAttribs", resources.MaxVertexAttribs); 408 symbolTable.insertConstInt("gl_MaxVertexUniformVectors", resources.MaxVertexUniformVectors); 409 symbolTable.insertConstInt("gl_MaxVaryingVectors", resources.MaxVaryingVectors); 410 symbolTable.insertConstInt("gl_MaxVertexTextureImageUnits", resources.MaxVertexTextureImageUnits); 411 symbolTable.insertConstInt("gl_MaxCombinedTextureImageUnits", resources.MaxCombinedTextureImageUnits); 412 symbolTable.insertConstInt("gl_MaxTextureImageUnits", resources.MaxTextureImageUnits); 413 symbolTable.insertConstInt("gl_MaxFragmentUniformVectors", resources.MaxFragmentUniformVectors); 414 415 if (spec != SH_CSS_SHADERS_SPEC) 416 { 417 symbolTable.insertConstInt("gl_MaxDrawBuffers", resources.MaxDrawBuffers); 418 } 419 } 420 421 void IdentifyBuiltIns(ShShaderType type, ShShaderSpec spec, 422 const ShBuiltInResources &resources, 423 TSymbolTable &symbolTable) 424 { 425 // 426 // First, insert some special built-in variables that are not in 427 // the built-in header files. 428 // 429 switch(type) { 430 case SH_FRAGMENT_SHADER: 431 symbolTable.insert(*new TVariable(NewPoolTString("gl_FragCoord"), TType(EbtFloat, EbpMedium, EvqFragCoord, 4))); 432 symbolTable.insert(*new TVariable(NewPoolTString("gl_FrontFacing"), TType(EbtBool, EbpUndefined, EvqFrontFacing, 1))); 433 symbolTable.insert(*new TVariable(NewPoolTString("gl_PointCoord"), TType(EbtFloat, EbpMedium, EvqPointCoord, 2))); 434 435 // 436 // In CSS Shaders, gl_FragColor, gl_FragData, and gl_MaxDrawBuffers are not available. 437 // Instead, css_MixColor and css_ColorMatrix are available. 438 // 439 if (spec != SH_CSS_SHADERS_SPEC) { 440 symbolTable.insert(*new TVariable(NewPoolTString("gl_FragColor"), TType(EbtFloat, EbpMedium, EvqFragColor, 4))); 441 symbolTable.insert(*new TVariable(NewPoolTString("gl_FragData[gl_MaxDrawBuffers]"), TType(EbtFloat, EbpMedium, EvqFragData, 4))); 442 if (resources.EXT_frag_depth) { 443 symbolTable.insert(*new TVariable(NewPoolTString("gl_FragDepthEXT"), TType(EbtFloat, resources.FragmentPrecisionHigh ? EbpHigh : EbpMedium, EvqFragDepth, 1))); 444 symbolTable.relateToExtension("gl_FragDepthEXT", "GL_EXT_frag_depth"); 445 } 446 } else { 447 symbolTable.insert(*new TVariable(NewPoolTString("css_MixColor"), TType(EbtFloat, EbpMedium, EvqGlobal, 4))); 448 symbolTable.insert(*new TVariable(NewPoolTString("css_ColorMatrix"), TType(EbtFloat, EbpMedium, EvqGlobal, 4, true))); 449 } 450 451 break; 452 453 case SH_VERTEX_SHADER: 454 symbolTable.insert(*new TVariable(NewPoolTString("gl_Position"), TType(EbtFloat, EbpHigh, EvqPosition, 4))); 455 symbolTable.insert(*new TVariable(NewPoolTString("gl_PointSize"), TType(EbtFloat, EbpMedium, EvqPointSize, 1))); 456 break; 457 458 default: assert(false && "Language not supported"); 459 } 460 461 // 462 // Next, identify which built-ins from the already loaded headers have 463 // a mapping to an operator. Those that are not identified as such are 464 // expected to be resolved through a library of functions, versus as 465 // operations. 466 // 467 symbolTable.relateToOperator("matrixCompMult", EOpMul); 468 469 symbolTable.relateToOperator("equal", EOpVectorEqual); 470 symbolTable.relateToOperator("notEqual", EOpVectorNotEqual); 471 symbolTable.relateToOperator("lessThan", EOpLessThan); 472 symbolTable.relateToOperator("greaterThan", EOpGreaterThan); 473 symbolTable.relateToOperator("lessThanEqual", EOpLessThanEqual); 474 symbolTable.relateToOperator("greaterThanEqual", EOpGreaterThanEqual); 475 476 symbolTable.relateToOperator("radians", EOpRadians); 477 symbolTable.relateToOperator("degrees", EOpDegrees); 478 symbolTable.relateToOperator("sin", EOpSin); 479 symbolTable.relateToOperator("cos", EOpCos); 480 symbolTable.relateToOperator("tan", EOpTan); 481 symbolTable.relateToOperator("asin", EOpAsin); 482 symbolTable.relateToOperator("acos", EOpAcos); 483 symbolTable.relateToOperator("atan", EOpAtan); 484 485 symbolTable.relateToOperator("pow", EOpPow); 486 symbolTable.relateToOperator("exp2", EOpExp2); 487 symbolTable.relateToOperator("log", EOpLog); 488 symbolTable.relateToOperator("exp", EOpExp); 489 symbolTable.relateToOperator("log2", EOpLog2); 490 symbolTable.relateToOperator("sqrt", EOpSqrt); 491 symbolTable.relateToOperator("inversesqrt", EOpInverseSqrt); 492 493 symbolTable.relateToOperator("abs", EOpAbs); 494 symbolTable.relateToOperator("sign", EOpSign); 495 symbolTable.relateToOperator("floor", EOpFloor); 496 symbolTable.relateToOperator("ceil", EOpCeil); 497 symbolTable.relateToOperator("fract", EOpFract); 498 symbolTable.relateToOperator("mod", EOpMod); 499 symbolTable.relateToOperator("min", EOpMin); 500 symbolTable.relateToOperator("max", EOpMax); 501 symbolTable.relateToOperator("clamp", EOpClamp); 502 symbolTable.relateToOperator("mix", EOpMix); 503 symbolTable.relateToOperator("step", EOpStep); 504 symbolTable.relateToOperator("smoothstep", EOpSmoothStep); 505 506 symbolTable.relateToOperator("length", EOpLength); 507 symbolTable.relateToOperator("distance", EOpDistance); 508 symbolTable.relateToOperator("dot", EOpDot); 509 symbolTable.relateToOperator("cross", EOpCross); 510 symbolTable.relateToOperator("normalize", EOpNormalize); 511 symbolTable.relateToOperator("faceforward", EOpFaceForward); 512 symbolTable.relateToOperator("reflect", EOpReflect); 513 symbolTable.relateToOperator("refract", EOpRefract); 514 515 symbolTable.relateToOperator("any", EOpAny); 516 symbolTable.relateToOperator("all", EOpAll); 517 symbolTable.relateToOperator("not", EOpVectorLogicalNot); 518 519 // Map language-specific operators. 520 switch(type) { 521 case SH_VERTEX_SHADER: 522 break; 523 case SH_FRAGMENT_SHADER: 524 if (resources.OES_standard_derivatives) { 525 symbolTable.relateToOperator("dFdx", EOpDFdx); 526 symbolTable.relateToOperator("dFdy", EOpDFdy); 527 symbolTable.relateToOperator("fwidth", EOpFwidth); 528 529 symbolTable.relateToExtension("dFdx", "GL_OES_standard_derivatives"); 530 symbolTable.relateToExtension("dFdy", "GL_OES_standard_derivatives"); 531 symbolTable.relateToExtension("fwidth", "GL_OES_standard_derivatives"); 532 } 533 break; 534 default: break; 535 } 536 537 // Finally add resource-specific variables. 538 switch(type) { 539 case SH_FRAGMENT_SHADER: 540 if (spec != SH_CSS_SHADERS_SPEC) { 541 // Set up gl_FragData. The array size. 542 TType fragData(EbtFloat, EbpMedium, EvqFragData, 4, false, true); 543 fragData.setArraySize(resources.MaxDrawBuffers); 544 symbolTable.insert(*new TVariable(NewPoolTString("gl_FragData"), fragData)); 545 } 546 break; 547 default: break; 548 } 549 } 550 551 void InitExtensionBehavior(const ShBuiltInResources& resources, 552 TExtensionBehavior& extBehavior) 553 { 554 if (resources.OES_standard_derivatives) 555 extBehavior["GL_OES_standard_derivatives"] = EBhUndefined; 556 if (resources.OES_EGL_image_external) 557 extBehavior["GL_OES_EGL_image_external"] = EBhUndefined; 558 if (resources.ARB_texture_rectangle) 559 extBehavior["GL_ARB_texture_rectangle"] = EBhUndefined; 560 if (resources.EXT_draw_buffers) 561 extBehavior["GL_EXT_draw_buffers"] = EBhUndefined; 562 if (resources.EXT_frag_depth) 563 extBehavior["GL_EXT_frag_depth"] = EBhUndefined; 564 } 565
