1 // 2 // Copyright (c) 2013-2014 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 // formatutils.cpp: Queries for GL image formats. 8 9 #include "common/mathutil.h" 10 #include "libGLESv2/formatutils.h" 11 #include "libGLESv2/Context.h" 12 #include "libGLESv2/Framebuffer.h" 13 #include "libGLESv2/renderer/Renderer.h" 14 #include "libGLESv2/renderer/imageformats.h" 15 #include "libGLESv2/renderer/copyimage.h" 16 17 namespace gl 18 { 19 20 // ES2 requires that format is equal to internal format at all glTex*Image2D entry points and the implementation 21 // can decide the true, sized, internal format. The ES2FormatMap determines the internal format for all valid 22 // format and type combinations. 23 24 FormatType::FormatType() 25 : internalFormat(GL_NONE), 26 colorWriteFunction(NULL) 27 { 28 } 29 30 typedef std::pair<GLenum, GLenum> FormatTypePair; 31 typedef std::pair<FormatTypePair, FormatType> FormatPair; 32 typedef std::map<FormatTypePair, FormatType> FormatMap; 33 34 // A helper function to insert data into the format map with fewer characters. 35 static inline void InsertFormatMapping(FormatMap *map, GLenum format, GLenum type, GLenum internalFormat, ColorWriteFunction writeFunc) 36 { 37 FormatType info; 38 info.internalFormat = internalFormat; 39 info.colorWriteFunction = writeFunc; 40 map->insert(FormatPair(FormatTypePair(format, type), info)); 41 } 42 43 FormatMap BuildFormatMap() 44 { 45 FormatMap map; 46 47 using namespace rx; 48 49 // | Format | Type | Internal format | Color write function | 50 InsertFormatMapping(&map, GL_RGBA, GL_UNSIGNED_BYTE, GL_RGBA8, WriteColor<R8G8B8A8, GLfloat> ); 51 InsertFormatMapping(&map, GL_RGBA, GL_BYTE, GL_RGBA8_SNORM, WriteColor<R8G8B8A8S, GLfloat> ); 52 InsertFormatMapping(&map, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, GL_RGBA4, WriteColor<R4G4B4A4, GLfloat> ); 53 InsertFormatMapping(&map, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, GL_RGB5_A1, WriteColor<R5G5B5A1, GLfloat> ); 54 InsertFormatMapping(&map, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, GL_RGB10_A2, WriteColor<R10G10B10A2, GLfloat> ); 55 InsertFormatMapping(&map, GL_RGBA, GL_FLOAT, GL_RGBA32F, WriteColor<R32G32B32A32F, GLfloat>); 56 InsertFormatMapping(&map, GL_RGBA, GL_HALF_FLOAT, GL_RGBA16F, WriteColor<R16G16B16A16F, GLfloat>); 57 InsertFormatMapping(&map, GL_RGBA, GL_HALF_FLOAT_OES, GL_RGBA16F, WriteColor<R16G16B16A16F, GLfloat>); 58 59 InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE, GL_RGBA8UI, WriteColor<R8G8B8A8, GLuint> ); 60 InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_BYTE, GL_RGBA8I, WriteColor<R8G8B8A8S, GLint> ); 61 InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT, GL_RGBA16UI, WriteColor<R16G16B16A16, GLuint> ); 62 InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_SHORT, GL_RGBA16I, WriteColor<R16G16B16A16S, GLint> ); 63 InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_INT, GL_RGBA32UI, WriteColor<R32G32B32A32, GLuint> ); 64 InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_INT, GL_RGBA32I, WriteColor<R32G32B32A32S, GLint> ); 65 InsertFormatMapping(&map, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV, GL_RGB10_A2UI, WriteColor<R10G10B10A2, GLuint> ); 66 67 InsertFormatMapping(&map, GL_RGB, GL_UNSIGNED_BYTE, GL_RGB8, WriteColor<R8G8B8, GLfloat> ); 68 InsertFormatMapping(&map, GL_RGB, GL_BYTE, GL_RGB8_SNORM, WriteColor<R8G8B8S, GLfloat> ); 69 InsertFormatMapping(&map, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, GL_RGB565, WriteColor<R5G6B5, GLfloat> ); 70 InsertFormatMapping(&map, GL_RGB, GL_UNSIGNED_INT_10F_11F_11F_REV, GL_R11F_G11F_B10F, WriteColor<R11G11B10F, GLfloat> ); 71 InsertFormatMapping(&map, GL_RGB, GL_UNSIGNED_INT_5_9_9_9_REV, GL_RGB9_E5, WriteColor<R9G9B9E5, GLfloat> ); 72 InsertFormatMapping(&map, GL_RGB, GL_FLOAT, GL_RGB32F, WriteColor<R32G32B32F, GLfloat> ); 73 InsertFormatMapping(&map, GL_RGB, GL_HALF_FLOAT, GL_RGB16F, WriteColor<R16G16B16F, GLfloat> ); 74 InsertFormatMapping(&map, GL_RGB, GL_HALF_FLOAT_OES, GL_RGB16F, WriteColor<R16G16B16F, GLfloat> ); 75 76 InsertFormatMapping(&map, GL_RGB_INTEGER, GL_UNSIGNED_BYTE, GL_RGB8UI, WriteColor<R8G8B8, GLuint> ); 77 InsertFormatMapping(&map, GL_RGB_INTEGER, GL_BYTE, GL_RGB8I, WriteColor<R8G8B8S, GLint> ); 78 InsertFormatMapping(&map, GL_RGB_INTEGER, GL_UNSIGNED_SHORT, GL_RGB16UI, WriteColor<R16G16B16, GLuint> ); 79 InsertFormatMapping(&map, GL_RGB_INTEGER, GL_SHORT, GL_RGB16I, WriteColor<R16G16B16S, GLint> ); 80 InsertFormatMapping(&map, GL_RGB_INTEGER, GL_UNSIGNED_INT, GL_RGB32UI, WriteColor<R32G32B32, GLuint> ); 81 InsertFormatMapping(&map, GL_RGB_INTEGER, GL_INT, GL_RGB32I, WriteColor<R32G32B32S, GLint> ); 82 83 InsertFormatMapping(&map, GL_RG, GL_UNSIGNED_BYTE, GL_RG8, WriteColor<R8G8, GLfloat> ); 84 InsertFormatMapping(&map, GL_RG, GL_BYTE, GL_RG8_SNORM, WriteColor<R8G8S, GLfloat> ); 85 InsertFormatMapping(&map, GL_RG, GL_FLOAT, GL_RG32F, WriteColor<R32G32F, GLfloat> ); 86 InsertFormatMapping(&map, GL_RG, GL_HALF_FLOAT, GL_RG16F, WriteColor<R16G16F, GLfloat> ); 87 InsertFormatMapping(&map, GL_RG, GL_HALF_FLOAT_OES, GL_RG16F, WriteColor<R16G16F, GLfloat> ); 88 89 InsertFormatMapping(&map, GL_RG_INTEGER, GL_UNSIGNED_BYTE, GL_RG8UI, WriteColor<R8G8, GLuint> ); 90 InsertFormatMapping(&map, GL_RG_INTEGER, GL_BYTE, GL_RG8I, WriteColor<R8G8S, GLint> ); 91 InsertFormatMapping(&map, GL_RG_INTEGER, GL_UNSIGNED_SHORT, GL_RG16UI, WriteColor<R16G16, GLuint> ); 92 InsertFormatMapping(&map, GL_RG_INTEGER, GL_SHORT, GL_RG16I, WriteColor<R16G16S, GLint> ); 93 InsertFormatMapping(&map, GL_RG_INTEGER, GL_UNSIGNED_INT, GL_RG32UI, WriteColor<R32G32, GLuint> ); 94 InsertFormatMapping(&map, GL_RG_INTEGER, GL_INT, GL_RG32I, WriteColor<R32G32S, GLint> ); 95 96 InsertFormatMapping(&map, GL_RED, GL_UNSIGNED_BYTE, GL_R8, WriteColor<R8, GLfloat> ); 97 InsertFormatMapping(&map, GL_RED, GL_BYTE, GL_R8_SNORM, WriteColor<R8S, GLfloat> ); 98 InsertFormatMapping(&map, GL_RED, GL_FLOAT, GL_R32F, WriteColor<R32F, GLfloat> ); 99 InsertFormatMapping(&map, GL_RED, GL_HALF_FLOAT, GL_R16F, WriteColor<R16F, GLfloat> ); 100 InsertFormatMapping(&map, GL_RED, GL_HALF_FLOAT_OES, GL_R16F, WriteColor<R16F, GLfloat> ); 101 102 InsertFormatMapping(&map, GL_RED_INTEGER, GL_UNSIGNED_BYTE, GL_R8UI, WriteColor<R8, GLuint> ); 103 InsertFormatMapping(&map, GL_RED_INTEGER, GL_BYTE, GL_R8I, WriteColor<R8S, GLint> ); 104 InsertFormatMapping(&map, GL_RED_INTEGER, GL_UNSIGNED_SHORT, GL_R16UI, WriteColor<R16, GLuint> ); 105 InsertFormatMapping(&map, GL_RED_INTEGER, GL_SHORT, GL_R16I, WriteColor<R16S, GLint> ); 106 InsertFormatMapping(&map, GL_RED_INTEGER, GL_UNSIGNED_INT, GL_R32UI, WriteColor<R32, GLuint> ); 107 InsertFormatMapping(&map, GL_RED_INTEGER, GL_INT, GL_R32I, WriteColor<R32S, GLint> ); 108 109 InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, GL_LUMINANCE8_ALPHA8_EXT, WriteColor<L8A8, GLfloat> ); 110 InsertFormatMapping(&map, GL_LUMINANCE, GL_UNSIGNED_BYTE, GL_LUMINANCE8_EXT, WriteColor<L8, GLfloat> ); 111 InsertFormatMapping(&map, GL_ALPHA, GL_UNSIGNED_BYTE, GL_ALPHA8_EXT, WriteColor<A8, GLfloat> ); 112 InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, GL_FLOAT, GL_LUMINANCE_ALPHA32F_EXT, WriteColor<L32A32F, GLfloat> ); 113 InsertFormatMapping(&map, GL_LUMINANCE, GL_FLOAT, GL_LUMINANCE32F_EXT, WriteColor<L32F, GLfloat> ); 114 InsertFormatMapping(&map, GL_ALPHA, GL_FLOAT, GL_ALPHA32F_EXT, WriteColor<A32F, GLfloat> ); 115 InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT, GL_LUMINANCE_ALPHA16F_EXT, WriteColor<L16A16F, GLfloat> ); 116 InsertFormatMapping(&map, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES, GL_LUMINANCE_ALPHA16F_EXT, WriteColor<L16A16F, GLfloat> ); 117 InsertFormatMapping(&map, GL_LUMINANCE, GL_HALF_FLOAT, GL_LUMINANCE16F_EXT, WriteColor<L16F, GLfloat> ); 118 InsertFormatMapping(&map, GL_LUMINANCE, GL_HALF_FLOAT_OES, GL_LUMINANCE16F_EXT, WriteColor<L16F, GLfloat> ); 119 InsertFormatMapping(&map, GL_ALPHA, GL_HALF_FLOAT, GL_ALPHA16F_EXT, WriteColor<A16F, GLfloat> ); 120 InsertFormatMapping(&map, GL_ALPHA, GL_HALF_FLOAT_OES, GL_ALPHA16F_EXT, WriteColor<A16F, GLfloat> ); 121 122 InsertFormatMapping(&map, GL_BGRA_EXT, GL_UNSIGNED_BYTE, GL_BGRA8_EXT, WriteColor<B8G8R8A8, GLfloat> ); 123 InsertFormatMapping(&map, GL_BGRA_EXT, GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, GL_BGRA4_ANGLEX, WriteColor<B4G4R4A4, GLfloat> ); 124 InsertFormatMapping(&map, GL_BGRA_EXT, GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, GL_BGR5_A1_ANGLEX, WriteColor<B5G5R5A1, GLfloat> ); 125 126 InsertFormatMapping(&map, GL_SRGB_EXT, GL_UNSIGNED_BYTE, GL_SRGB8, WriteColor<R8G8B8, GLfloat> ); 127 InsertFormatMapping(&map, GL_SRGB_ALPHA_EXT, GL_UNSIGNED_BYTE, GL_SRGB8_ALPHA8, WriteColor<R8G8B8A8, GLfloat> ); 128 129 InsertFormatMapping(&map, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, NULL ); 130 InsertFormatMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, NULL ); 131 InsertFormatMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, GL_UNSIGNED_BYTE, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, NULL ); 132 InsertFormatMapping(&map, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, GL_UNSIGNED_BYTE, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, NULL ); 133 134 InsertFormatMapping(&map, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, GL_DEPTH_COMPONENT16, NULL ); 135 InsertFormatMapping(&map, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, GL_DEPTH_COMPONENT32_OES, NULL ); 136 InsertFormatMapping(&map, GL_DEPTH_COMPONENT, GL_FLOAT, GL_DEPTH_COMPONENT32F, NULL ); 137 138 InsertFormatMapping(&map, GL_STENCIL, GL_UNSIGNED_BYTE, GL_STENCIL_INDEX8, NULL ); 139 140 InsertFormatMapping(&map, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, GL_DEPTH24_STENCIL8, NULL ); 141 InsertFormatMapping(&map, GL_DEPTH_STENCIL, GL_FLOAT_32_UNSIGNED_INT_24_8_REV, GL_DEPTH32F_STENCIL8, NULL ); 142 143 return map; 144 } 145 146 Type::Type() 147 : bytes(0), 148 specialInterpretation(false) 149 { 150 } 151 152 // Map of sizes of input types 153 typedef std::pair<GLenum, Type> TypeInfoPair; 154 typedef std::map<GLenum, Type> TypeInfoMap; 155 156 static inline void InsertTypeInfo(TypeInfoMap *map, GLenum type, GLuint bytes, bool specialInterpretation) 157 { 158 Type info; 159 info.bytes = bytes; 160 info.specialInterpretation = specialInterpretation; 161 162 map->insert(std::make_pair(type, info)); 163 } 164 165 bool operator<(const Type& a, const Type& b) 166 { 167 return memcmp(&a, &b, sizeof(Type)) < 0; 168 } 169 170 static TypeInfoMap BuildTypeInfoMap() 171 { 172 TypeInfoMap map; 173 174 InsertTypeInfo(&map, GL_UNSIGNED_BYTE, 1, false); 175 InsertTypeInfo(&map, GL_BYTE, 1, false); 176 InsertTypeInfo(&map, GL_UNSIGNED_SHORT, 2, false); 177 InsertTypeInfo(&map, GL_SHORT, 2, false); 178 InsertTypeInfo(&map, GL_UNSIGNED_INT, 4, false); 179 InsertTypeInfo(&map, GL_INT, 4, false); 180 InsertTypeInfo(&map, GL_HALF_FLOAT, 2, false); 181 InsertTypeInfo(&map, GL_HALF_FLOAT_OES, 2, false); 182 InsertTypeInfo(&map, GL_FLOAT, 4, false); 183 InsertTypeInfo(&map, GL_UNSIGNED_SHORT_5_6_5, 2, true ); 184 InsertTypeInfo(&map, GL_UNSIGNED_SHORT_4_4_4_4, 2, true ); 185 InsertTypeInfo(&map, GL_UNSIGNED_SHORT_5_5_5_1, 2, true ); 186 InsertTypeInfo(&map, GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, 2, true ); 187 InsertTypeInfo(&map, GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, 2, true ); 188 InsertTypeInfo(&map, GL_UNSIGNED_INT_2_10_10_10_REV, 4, true ); 189 InsertTypeInfo(&map, GL_UNSIGNED_INT_24_8, 4, true ); 190 InsertTypeInfo(&map, GL_UNSIGNED_INT_10F_11F_11F_REV, 4, true ); 191 InsertTypeInfo(&map, GL_UNSIGNED_INT_5_9_9_9_REV, 4, true ); 192 InsertTypeInfo(&map, GL_UNSIGNED_INT_24_8_OES, 4, true ); 193 InsertTypeInfo(&map, GL_FLOAT_32_UNSIGNED_INT_24_8_REV, 8, true ); 194 195 return map; 196 } 197 198 // Information about internal formats 199 static bool AlwaysSupported(GLuint, const Extensions &) 200 { 201 return true; 202 } 203 204 static bool UnimplementedSupport(GLuint, const Extensions &) 205 { 206 return false; 207 } 208 209 static bool NeverSupported(GLuint, const Extensions &) 210 { 211 return false; 212 } 213 214 template <GLuint minCoreGLVersion> 215 static bool RequireESVersion(GLuint clientVersion, const Extensions &) 216 { 217 return clientVersion >= minCoreGLVersion; 218 } 219 220 // Pointer to a boolean memeber of the Extensions struct 221 typedef bool(Extensions::*ExtensionBool); 222 223 // Check support for a single extension 224 template <ExtensionBool bool1> 225 static bool RequireExtension(GLuint, const Extensions & extensions) 226 { 227 return extensions.*bool1; 228 } 229 230 // Check for a minimum client version or a single extension 231 template <GLuint minCoreGLVersion, ExtensionBool bool1> 232 static bool RequireESVersionOrExtension(GLuint clientVersion, const Extensions &extensions) 233 { 234 return clientVersion >= minCoreGLVersion || extensions.*bool1; 235 } 236 237 // Check for a minimum client version or two extensions 238 template <GLuint minCoreGLVersion, ExtensionBool bool1, ExtensionBool bool2> 239 static bool RequireESVersionOrExtensions(GLuint clientVersion, const Extensions &extensions) 240 { 241 return clientVersion >= minCoreGLVersion || (extensions.*bool1 || extensions.*bool2); 242 } 243 244 // Check support for two extensions 245 template <ExtensionBool bool1, ExtensionBool bool2> 246 static bool RequireExtensions(GLuint, const Extensions &extensions) 247 { 248 return extensions.*bool1 || extensions.*bool2; 249 } 250 251 InternalFormat::InternalFormat() 252 : redBits(0), 253 greenBits(0), 254 blueBits(0), 255 luminanceBits(0), 256 alphaBits(0), 257 sharedBits(0), 258 depthBits(0), 259 stencilBits(0), 260 pixelBytes(0), 261 componentCount(0), 262 compressedBlockWidth(0), 263 compressedBlockHeight(0), 264 format(GL_NONE), 265 type(GL_NONE), 266 componentType(GL_NONE), 267 colorEncoding(GL_NONE), 268 compressed(false), 269 textureSupport(NeverSupported), 270 renderSupport(NeverSupported), 271 filterSupport(NeverSupported) 272 { 273 } 274 275 static InternalFormat UnsizedFormat(GLenum format, InternalFormat::SupportCheckFunction textureSupport, 276 InternalFormat::SupportCheckFunction renderSupport, 277 InternalFormat::SupportCheckFunction filterSupport) 278 { 279 InternalFormat formatInfo; 280 formatInfo.format = format; 281 formatInfo.textureSupport = textureSupport; 282 formatInfo.renderSupport = renderSupport; 283 formatInfo.filterSupport = filterSupport; 284 return formatInfo; 285 } 286 287 static InternalFormat RGBAFormat(GLuint red, GLuint green, GLuint blue, GLuint alpha, GLuint shared, 288 GLenum format, GLenum type, GLenum componentType, bool srgb, 289 InternalFormat::SupportCheckFunction textureSupport, 290 InternalFormat::SupportCheckFunction renderSupport, 291 InternalFormat::SupportCheckFunction filterSupport) 292 { 293 InternalFormat formatInfo; 294 formatInfo.redBits = red; 295 formatInfo.greenBits = green; 296 formatInfo.blueBits = blue; 297 formatInfo.alphaBits = alpha; 298 formatInfo.sharedBits = shared; 299 formatInfo.pixelBytes = (red + green + blue + alpha + shared) / 8; 300 formatInfo.componentCount = ((red > 0) ? 1 : 0) + ((green > 0) ? 1 : 0) + ((blue > 0) ? 1 : 0) + ((alpha > 0) ? 1 : 0); 301 formatInfo.format = format; 302 formatInfo.type = type; 303 formatInfo.componentType = componentType; 304 formatInfo.colorEncoding = (srgb ? GL_SRGB : GL_LINEAR); 305 formatInfo.textureSupport = textureSupport; 306 formatInfo.renderSupport = renderSupport; 307 formatInfo.filterSupport = filterSupport; 308 return formatInfo; 309 } 310 311 static InternalFormat LUMAFormat(GLuint luminance, GLuint alpha, GLenum format, GLenum type, GLenum componentType, 312 InternalFormat::SupportCheckFunction textureSupport, 313 InternalFormat::SupportCheckFunction renderSupport, 314 InternalFormat::SupportCheckFunction filterSupport) 315 { 316 InternalFormat formatInfo; 317 formatInfo.luminanceBits = luminance; 318 formatInfo.alphaBits = alpha; 319 formatInfo.pixelBytes = (luminance + alpha) / 8; 320 formatInfo.componentCount = ((luminance > 0) ? 1 : 0) + ((alpha > 0) ? 1 : 0); 321 formatInfo.format = format; 322 formatInfo.type = type; 323 formatInfo.componentType = componentType; 324 formatInfo.colorEncoding = GL_LINEAR; 325 formatInfo.textureSupport = textureSupport; 326 formatInfo.renderSupport = renderSupport; 327 formatInfo.filterSupport = filterSupport; 328 return formatInfo; 329 } 330 331 static InternalFormat DepthStencilFormat(GLuint depthBits, GLuint stencilBits, GLuint unusedBits, GLenum format, 332 GLenum type, GLenum componentType, InternalFormat::SupportCheckFunction textureSupport, 333 InternalFormat::SupportCheckFunction renderSupport, 334 InternalFormat::SupportCheckFunction filterSupport) 335 { 336 InternalFormat formatInfo; 337 formatInfo.depthBits = depthBits; 338 formatInfo.stencilBits = stencilBits; 339 formatInfo.pixelBytes = (depthBits + stencilBits + unusedBits) / 8; 340 formatInfo.componentCount = ((depthBits > 0) ? 1 : 0) + ((stencilBits > 0) ? 1 : 0); 341 formatInfo.format = format; 342 formatInfo.type = type; 343 formatInfo.componentType = componentType; 344 formatInfo.colorEncoding = GL_LINEAR; 345 formatInfo.textureSupport = textureSupport; 346 formatInfo.renderSupport = renderSupport; 347 formatInfo.filterSupport = filterSupport; 348 return formatInfo; 349 } 350 351 static InternalFormat CompressedFormat(GLuint compressedBlockWidth, GLuint compressedBlockHeight, GLuint compressedBlockSize, 352 GLuint componentCount, GLenum format, GLenum type, bool srgb, 353 InternalFormat::SupportCheckFunction textureSupport, 354 InternalFormat::SupportCheckFunction renderSupport, 355 InternalFormat::SupportCheckFunction filterSupport) 356 { 357 InternalFormat formatInfo; 358 formatInfo.compressedBlockWidth = compressedBlockWidth; 359 formatInfo.compressedBlockHeight = compressedBlockHeight; 360 formatInfo.pixelBytes = compressedBlockSize / 8; 361 formatInfo.componentCount = componentCount; 362 formatInfo.format = format; 363 formatInfo.type = type; 364 formatInfo.componentType = GL_UNSIGNED_NORMALIZED; 365 formatInfo.colorEncoding = (srgb ? GL_SRGB : GL_LINEAR); 366 formatInfo.compressed = true; 367 formatInfo.textureSupport = textureSupport; 368 formatInfo.renderSupport = renderSupport; 369 formatInfo.filterSupport = filterSupport; 370 return formatInfo; 371 } 372 373 typedef std::pair<GLenum, InternalFormat> InternalFormatInfoPair; 374 typedef std::map<GLenum, InternalFormat> InternalFormatInfoMap; 375 376 static InternalFormatInfoMap BuildInternalFormatInfoMap() 377 { 378 InternalFormatInfoMap map; 379 380 // From ES 3.0.1 spec, table 3.12 381 map.insert(InternalFormatInfoPair(GL_NONE, InternalFormat())); 382 383 // | Internal format | | R | G | B | A |S | Format | Type | Component type | SRGB | Texture supported | Renderable | Filterable | 384 map.insert(InternalFormatInfoPair(GL_R8, RGBAFormat( 8, 0, 0, 0, 0, GL_RED, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireESVersionOrExtension<3, &Extensions::textureRG>, AlwaysSupported, AlwaysSupported))); 385 map.insert(InternalFormatInfoPair(GL_R8_SNORM, RGBAFormat( 8, 0, 0, 0, 0, GL_RED, GL_BYTE, GL_SIGNED_NORMALIZED, false, RequireESVersion<3>, NeverSupported, AlwaysSupported))); 386 map.insert(InternalFormatInfoPair(GL_RG8, RGBAFormat( 8, 8, 0, 0, 0, GL_RG, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireESVersionOrExtension<3, &Extensions::textureRG>, AlwaysSupported, AlwaysSupported))); 387 map.insert(InternalFormatInfoPair(GL_RG8_SNORM, RGBAFormat( 8, 8, 0, 0, 0, GL_RG, GL_BYTE, GL_SIGNED_NORMALIZED, false, RequireESVersion<3>, NeverSupported, AlwaysSupported))); 388 map.insert(InternalFormatInfoPair(GL_RGB8, RGBAFormat( 8, 8, 8, 0, 0, GL_RGB, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireESVersionOrExtension<3, &Extensions::rgb8rgba8>, AlwaysSupported, AlwaysSupported))); 389 map.insert(InternalFormatInfoPair(GL_RGB8_SNORM, RGBAFormat( 8, 8, 8, 0, 0, GL_RGB, GL_BYTE, GL_SIGNED_NORMALIZED, false, RequireESVersion<3>, NeverSupported, AlwaysSupported))); 390 map.insert(InternalFormatInfoPair(GL_RGB565, RGBAFormat( 5, 6, 5, 0, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_NORMALIZED, false, RequireESVersion<2>, AlwaysSupported, AlwaysSupported))); 391 map.insert(InternalFormatInfoPair(GL_RGBA4, RGBAFormat( 4, 4, 4, 4, 0, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, GL_UNSIGNED_NORMALIZED, false, RequireESVersion<2>, AlwaysSupported, AlwaysSupported))); 392 map.insert(InternalFormatInfoPair(GL_RGB5_A1, RGBAFormat( 5, 5, 5, 1, 0, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, GL_UNSIGNED_NORMALIZED, false, RequireESVersion<2>, AlwaysSupported, AlwaysSupported))); 393 map.insert(InternalFormatInfoPair(GL_RGBA8, RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireESVersionOrExtension<3, &Extensions::rgb8rgba8>, AlwaysSupported, AlwaysSupported))); 394 map.insert(InternalFormatInfoPair(GL_RGBA8_SNORM, RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA, GL_BYTE, GL_SIGNED_NORMALIZED, false, RequireESVersion<3>, NeverSupported, AlwaysSupported))); 395 map.insert(InternalFormatInfoPair(GL_RGB10_A2, RGBAFormat(10, 10, 10, 2, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_NORMALIZED, false, RequireESVersion<3>, AlwaysSupported, AlwaysSupported))); 396 map.insert(InternalFormatInfoPair(GL_RGB10_A2UI, RGBAFormat(10, 10, 10, 2, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); 397 map.insert(InternalFormatInfoPair(GL_SRGB8, RGBAFormat( 8, 8, 8, 0, 0, GL_RGB, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, true, RequireESVersionOrExtension<3, &Extensions::sRGB>, NeverSupported, AlwaysSupported))); 398 map.insert(InternalFormatInfoPair(GL_SRGB8_ALPHA8, RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, true, RequireESVersionOrExtension<3, &Extensions::sRGB>, AlwaysSupported, AlwaysSupported))); 399 map.insert(InternalFormatInfoPair(GL_R11F_G11F_B10F, RGBAFormat(11, 11, 10, 0, 0, GL_RGB, GL_UNSIGNED_INT_10F_11F_11F_REV, GL_FLOAT, false, RequireESVersion<3>, RequireExtension<&Extensions::colorBufferFloat>, AlwaysSupported))); 400 map.insert(InternalFormatInfoPair(GL_RGB9_E5, RGBAFormat( 9, 9, 9, 0, 5, GL_RGB, GL_UNSIGNED_INT_5_9_9_9_REV, GL_FLOAT, false, RequireESVersion<3>, NeverSupported, AlwaysSupported))); 401 map.insert(InternalFormatInfoPair(GL_R8I, RGBAFormat( 8, 0, 0, 0, 0, GL_RED_INTEGER, GL_BYTE, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 402 map.insert(InternalFormatInfoPair(GL_R8UI, RGBAFormat( 8, 0, 0, 0, 0, GL_RED_INTEGER, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 403 map.insert(InternalFormatInfoPair(GL_R16I, RGBAFormat(16, 0, 0, 0, 0, GL_RED_INTEGER, GL_SHORT, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 404 map.insert(InternalFormatInfoPair(GL_R16UI, RGBAFormat(16, 0, 0, 0, 0, GL_RED_INTEGER, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 405 map.insert(InternalFormatInfoPair(GL_R32I, RGBAFormat(32, 0, 0, 0, 0, GL_RED_INTEGER, GL_INT, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 406 map.insert(InternalFormatInfoPair(GL_R32UI, RGBAFormat(32, 0, 0, 0, 0, GL_RED_INTEGER, GL_UNSIGNED_INT, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 407 map.insert(InternalFormatInfoPair(GL_RG8I, RGBAFormat( 8, 8, 0, 0, 0, GL_RG_INTEGER, GL_BYTE, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 408 map.insert(InternalFormatInfoPair(GL_RG8UI, RGBAFormat( 8, 8, 0, 0, 0, GL_RG_INTEGER, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 409 map.insert(InternalFormatInfoPair(GL_RG16I, RGBAFormat(16, 16, 0, 0, 0, GL_RG_INTEGER, GL_SHORT, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 410 map.insert(InternalFormatInfoPair(GL_RG16UI, RGBAFormat(16, 16, 0, 0, 0, GL_RG_INTEGER, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 411 map.insert(InternalFormatInfoPair(GL_RG32I, RGBAFormat(32, 32, 0, 0, 0, GL_RG_INTEGER, GL_INT, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 412 map.insert(InternalFormatInfoPair(GL_RG32UI, RGBAFormat(32, 32, 0, 0, 0, GL_RG_INTEGER, GL_UNSIGNED_INT, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 413 map.insert(InternalFormatInfoPair(GL_RGB8I, RGBAFormat( 8, 8, 8, 0, 0, GL_RGB_INTEGER, GL_BYTE, GL_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); 414 map.insert(InternalFormatInfoPair(GL_RGB8UI, RGBAFormat( 8, 8, 8, 0, 0, GL_RGB_INTEGER, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); 415 map.insert(InternalFormatInfoPair(GL_RGB16I, RGBAFormat(16, 16, 16, 0, 0, GL_RGB_INTEGER, GL_SHORT, GL_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); 416 map.insert(InternalFormatInfoPair(GL_RGB16UI, RGBAFormat(16, 16, 16, 0, 0, GL_RGB_INTEGER, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); 417 map.insert(InternalFormatInfoPair(GL_RGB32I, RGBAFormat(32, 32, 32, 0, 0, GL_RGB_INTEGER, GL_INT, GL_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); 418 map.insert(InternalFormatInfoPair(GL_RGB32UI, RGBAFormat(32, 32, 32, 0, 0, GL_RGB_INTEGER, GL_UNSIGNED_INT, GL_UNSIGNED_INT, false, RequireESVersion<3>, NeverSupported, NeverSupported))); 419 map.insert(InternalFormatInfoPair(GL_RGBA8I, RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA_INTEGER, GL_BYTE, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 420 map.insert(InternalFormatInfoPair(GL_RGBA8UI, RGBAFormat( 8, 8, 8, 8, 0, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 421 map.insert(InternalFormatInfoPair(GL_RGBA16I, RGBAFormat(16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_SHORT, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 422 map.insert(InternalFormatInfoPair(GL_RGBA16UI, RGBAFormat(16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 423 map.insert(InternalFormatInfoPair(GL_RGBA32I, RGBAFormat(32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_INT, GL_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 424 map.insert(InternalFormatInfoPair(GL_RGBA32UI, RGBAFormat(32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT, GL_UNSIGNED_INT, false, RequireESVersion<3>, AlwaysSupported, NeverSupported))); 425 426 map.insert(InternalFormatInfoPair(GL_BGRA8_EXT, RGBAFormat( 8, 8, 8, 8, 0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, false, RequireExtension<&Extensions::textureFormatBGRA8888>, AlwaysSupported, AlwaysSupported))); 427 map.insert(InternalFormatInfoPair(GL_BGRA4_ANGLEX, RGBAFormat( 4, 4, 4, 4, 0, GL_BGRA_EXT, GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, GL_UNSIGNED_NORMALIZED, false, RequireExtension<&Extensions::textureFormatBGRA8888>, AlwaysSupported, AlwaysSupported))); 428 map.insert(InternalFormatInfoPair(GL_BGR5_A1_ANGLEX, RGBAFormat( 5, 5, 5, 1, 0, GL_BGRA_EXT, GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, GL_UNSIGNED_NORMALIZED, false, RequireExtension<&Extensions::textureFormatBGRA8888>, AlwaysSupported, AlwaysSupported))); 429 430 // Floating point renderability and filtering is provided by OES_texture_float and OES_texture_half_float 431 // | Internal format | | D |S | Format | Type | Comp | SRGB | Texture supported | Renderable | Filterable | 432 // | | | | | | | type | | | | | 433 map.insert(InternalFormatInfoPair(GL_R16F, RGBAFormat(16, 0, 0, 0, 0, GL_RED, GL_HALF_FLOAT, GL_FLOAT, false, RequireESVersionOrExtensions<3, &Extensions::textureHalfFloat, &Extensions::textureRG>, AlwaysSupported, RequireExtension<&Extensions::textureHalfFloatLinear>))); 434 map.insert(InternalFormatInfoPair(GL_RG16F, RGBAFormat(16, 16, 0, 0, 0, GL_RG, GL_HALF_FLOAT, GL_FLOAT, false, RequireESVersionOrExtensions<3, &Extensions::textureHalfFloat, &Extensions::textureRG>, AlwaysSupported, RequireExtension<&Extensions::textureHalfFloatLinear>))); 435 map.insert(InternalFormatInfoPair(GL_RGB16F, RGBAFormat(16, 16, 16, 0, 0, GL_RGB, GL_HALF_FLOAT, GL_FLOAT, false, RequireESVersionOrExtension<3, &Extensions::textureHalfFloat>, AlwaysSupported, RequireExtension<&Extensions::textureHalfFloatLinear>))); 436 map.insert(InternalFormatInfoPair(GL_RGBA16F, RGBAFormat(16, 16, 16, 16, 0, GL_RGBA, GL_HALF_FLOAT, GL_FLOAT, false, RequireESVersionOrExtension<3, &Extensions::textureHalfFloat>, AlwaysSupported, RequireExtension<&Extensions::textureHalfFloatLinear>))); 437 map.insert(InternalFormatInfoPair(GL_R32F, RGBAFormat(32, 0, 0, 0, 0, GL_RED, GL_FLOAT, GL_FLOAT, false, RequireESVersionOrExtensions<3, &Extensions::textureFloat, &Extensions::textureRG>, AlwaysSupported, RequireExtension<&Extensions::textureFloatLinear> ))); 438 map.insert(InternalFormatInfoPair(GL_RG32F, RGBAFormat(32, 32, 0, 0, 0, GL_RG, GL_FLOAT, GL_FLOAT, false, RequireESVersionOrExtensions<3, &Extensions::textureFloat, &Extensions::textureRG>, AlwaysSupported, RequireExtension<&Extensions::textureFloatLinear> ))); 439 map.insert(InternalFormatInfoPair(GL_RGB32F, RGBAFormat(32, 32, 32, 0, 0, GL_RGB, GL_FLOAT, GL_FLOAT, false, RequireESVersionOrExtension<3, &Extensions::textureFloat>, AlwaysSupported, RequireExtension<&Extensions::textureFloatLinear> ))); 440 map.insert(InternalFormatInfoPair(GL_RGBA32F, RGBAFormat(32, 32, 32, 32, 0, GL_RGBA, GL_FLOAT, GL_FLOAT, false, RequireESVersionOrExtension<3, &Extensions::textureFloat>, AlwaysSupported, RequireExtension<&Extensions::textureFloatLinear> ))); 441 442 // Depth stencil formats 443 // | Internal format | | D |S | X | Format | Type | Component type | Supported | 444 map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT16, DepthStencilFormat(16, 0, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, GL_UNSIGNED_NORMALIZED, RequireESVersion<2>, AlwaysSupported, RequireESVersionOrExtension<3, &Extensions::depthTextures>))); 445 map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT24, DepthStencilFormat(24, 0, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, GL_UNSIGNED_NORMALIZED, RequireESVersion<3>, AlwaysSupported, RequireESVersionOrExtension<3, &Extensions::depthTextures>))); 446 map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT32F, DepthStencilFormat(32, 0, 0, GL_DEPTH_COMPONENT, GL_FLOAT, GL_FLOAT, RequireESVersion<3>, AlwaysSupported, RequireESVersionOrExtension<3, &Extensions::depthTextures>))); 447 map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT32_OES, DepthStencilFormat(32, 0, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, GL_UNSIGNED_NORMALIZED, RequireExtension<&Extensions::depthTextures>, AlwaysSupported, AlwaysSupported ))); 448 map.insert(InternalFormatInfoPair(GL_DEPTH24_STENCIL8, DepthStencilFormat(24, 8, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, GL_UNSIGNED_NORMALIZED, RequireESVersionOrExtension<2, &Extensions::depthTextures>, AlwaysSupported, AlwaysSupported ))); 449 map.insert(InternalFormatInfoPair(GL_DEPTH32F_STENCIL8, DepthStencilFormat(32, 8, 24, GL_DEPTH_STENCIL, GL_FLOAT_32_UNSIGNED_INT_24_8_REV, GL_FLOAT, RequireESVersion<3>, AlwaysSupported, AlwaysSupported ))); 450 map.insert(InternalFormatInfoPair(GL_STENCIL_INDEX8, DepthStencilFormat( 0, 8, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT, RequireESVersion<2>, AlwaysSupported, NeverSupported ))); 451 452 // Luminance alpha formats 453 // | Internal format | | L | A | Format | Type | Component type | Supported | Renderable | Filterable | 454 map.insert(InternalFormatInfoPair(GL_ALPHA8_EXT, LUMAFormat( 0, 8, GL_ALPHA, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, RequireExtension<&Extensions::textureStorage>, NeverSupported, AlwaysSupported))); 455 map.insert(InternalFormatInfoPair(GL_LUMINANCE8_EXT, LUMAFormat( 8, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, RequireExtension<&Extensions::textureStorage>, NeverSupported, AlwaysSupported))); 456 map.insert(InternalFormatInfoPair(GL_ALPHA32F_EXT, LUMAFormat( 0, 32, GL_ALPHA, GL_FLOAT, GL_FLOAT, RequireExtensions<&Extensions::textureStorage, &Extensions::textureFloat>, NeverSupported, AlwaysSupported))); 457 map.insert(InternalFormatInfoPair(GL_LUMINANCE32F_EXT, LUMAFormat(32, 0, GL_LUMINANCE, GL_FLOAT, GL_FLOAT, RequireExtensions<&Extensions::textureStorage, &Extensions::textureFloat>, NeverSupported, AlwaysSupported))); 458 map.insert(InternalFormatInfoPair(GL_ALPHA16F_EXT, LUMAFormat( 0, 16, GL_ALPHA, GL_HALF_FLOAT, GL_FLOAT, RequireExtensions<&Extensions::textureStorage, &Extensions::textureHalfFloat>, NeverSupported, AlwaysSupported))); 459 map.insert(InternalFormatInfoPair(GL_LUMINANCE16F_EXT, LUMAFormat(16, 0, GL_LUMINANCE, GL_HALF_FLOAT, GL_FLOAT, RequireExtensions<&Extensions::textureStorage, &Extensions::textureHalfFloat>, NeverSupported, AlwaysSupported))); 460 map.insert(InternalFormatInfoPair(GL_LUMINANCE8_ALPHA8_EXT, LUMAFormat( 8, 8, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, RequireExtension<&Extensions::textureStorage>, NeverSupported, AlwaysSupported))); 461 map.insert(InternalFormatInfoPair(GL_LUMINANCE_ALPHA32F_EXT, LUMAFormat(32, 32, GL_LUMINANCE_ALPHA, GL_FLOAT, GL_FLOAT, RequireExtensions<&Extensions::textureStorage, &Extensions::textureFloat>, NeverSupported, AlwaysSupported))); 462 map.insert(InternalFormatInfoPair(GL_LUMINANCE_ALPHA16F_EXT, LUMAFormat(16, 16, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT, GL_FLOAT, RequireExtensions<&Extensions::textureStorage, &Extensions::textureHalfFloat>, NeverSupported, AlwaysSupported))); 463 464 // Unsized formats 465 // | Internal format | | Format | Supported | Renderable | Filterable | 466 map.insert(InternalFormatInfoPair(GL_ALPHA, UnsizedFormat(GL_ALPHA, RequireESVersion<2>, NeverSupported, AlwaysSupported))); 467 map.insert(InternalFormatInfoPair(GL_LUMINANCE, UnsizedFormat(GL_LUMINANCE, RequireESVersion<2>, NeverSupported, AlwaysSupported))); 468 map.insert(InternalFormatInfoPair(GL_LUMINANCE_ALPHA, UnsizedFormat(GL_LUMINANCE_ALPHA, RequireESVersion<2>, NeverSupported, AlwaysSupported))); 469 map.insert(InternalFormatInfoPair(GL_RED, UnsizedFormat(GL_RED, RequireESVersionOrExtension<3, &Extensions::textureRG>, NeverSupported, AlwaysSupported))); 470 map.insert(InternalFormatInfoPair(GL_RG, UnsizedFormat(GL_RG, RequireESVersionOrExtension<3, &Extensions::textureRG>, NeverSupported, AlwaysSupported))); 471 map.insert(InternalFormatInfoPair(GL_RGB, UnsizedFormat(GL_RGB, RequireESVersion<2>, AlwaysSupported, AlwaysSupported))); 472 map.insert(InternalFormatInfoPair(GL_RGBA, UnsizedFormat(GL_RGBA, RequireESVersion<2>, AlwaysSupported, AlwaysSupported))); 473 map.insert(InternalFormatInfoPair(GL_RED_INTEGER, UnsizedFormat(GL_RED_INTEGER, RequireESVersion<3>, NeverSupported, NeverSupported ))); 474 map.insert(InternalFormatInfoPair(GL_RG_INTEGER, UnsizedFormat(GL_RG_INTEGER, RequireESVersion<3>, NeverSupported, NeverSupported ))); 475 map.insert(InternalFormatInfoPair(GL_RGB_INTEGER, UnsizedFormat(GL_RGB_INTEGER, RequireESVersion<3>, NeverSupported, NeverSupported ))); 476 map.insert(InternalFormatInfoPair(GL_RGBA_INTEGER, UnsizedFormat(GL_RGBA_INTEGER, RequireESVersion<3>, NeverSupported, NeverSupported ))); 477 map.insert(InternalFormatInfoPair(GL_BGRA_EXT, UnsizedFormat(GL_BGRA_EXT, RequireExtension<&Extensions::textureFormatBGRA8888>, AlwaysSupported, AlwaysSupported))); 478 map.insert(InternalFormatInfoPair(GL_DEPTH_COMPONENT, UnsizedFormat(GL_DEPTH_COMPONENT, RequireESVersion<2>, AlwaysSupported, AlwaysSupported))); 479 map.insert(InternalFormatInfoPair(GL_DEPTH_STENCIL, UnsizedFormat(GL_DEPTH_STENCIL, RequireESVersionOrExtension<3, &Extensions::packedDepthStencil>, AlwaysSupported, AlwaysSupported))); 480 map.insert(InternalFormatInfoPair(GL_SRGB_EXT, UnsizedFormat(GL_RGB, RequireESVersionOrExtension<3, &Extensions::sRGB>, NeverSupported, AlwaysSupported))); 481 map.insert(InternalFormatInfoPair(GL_SRGB_ALPHA_EXT, UnsizedFormat(GL_RGBA, RequireESVersionOrExtension<3, &Extensions::sRGB>, AlwaysSupported, AlwaysSupported))); 482 483 // Compressed formats, From ES 3.0.1 spec, table 3.16 484 // | Internal format | |W |H | BS |CC| Format | Type | SRGB | Supported | Renderable | Filterable | 485 map.insert(InternalFormatInfoPair(GL_COMPRESSED_R11_EAC, CompressedFormat(4, 4, 64, 1, GL_COMPRESSED_R11_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); 486 map.insert(InternalFormatInfoPair(GL_COMPRESSED_SIGNED_R11_EAC, CompressedFormat(4, 4, 64, 1, GL_COMPRESSED_SIGNED_R11_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); 487 map.insert(InternalFormatInfoPair(GL_COMPRESSED_RG11_EAC, CompressedFormat(4, 4, 128, 2, GL_COMPRESSED_RG11_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); 488 map.insert(InternalFormatInfoPair(GL_COMPRESSED_SIGNED_RG11_EAC, CompressedFormat(4, 4, 128, 2, GL_COMPRESSED_SIGNED_RG11_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); 489 map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGB8_ETC2, CompressedFormat(4, 4, 64, 3, GL_COMPRESSED_RGB8_ETC2, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); 490 map.insert(InternalFormatInfoPair(GL_COMPRESSED_SRGB8_ETC2, CompressedFormat(4, 4, 64, 3, GL_COMPRESSED_SRGB8_ETC2, GL_UNSIGNED_BYTE, true, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); 491 map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2, CompressedFormat(4, 4, 64, 3, GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); 492 map.insert(InternalFormatInfoPair(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2, CompressedFormat(4, 4, 64, 3, GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2, GL_UNSIGNED_BYTE, true, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); 493 map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGBA8_ETC2_EAC, CompressedFormat(4, 4, 128, 4, GL_COMPRESSED_RGBA8_ETC2_EAC, GL_UNSIGNED_BYTE, false, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); 494 map.insert(InternalFormatInfoPair(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, CompressedFormat(4, 4, 128, 4, GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, GL_UNSIGNED_BYTE, true, UnimplementedSupport, UnimplementedSupport, UnimplementedSupport))); 495 496 // From GL_EXT_texture_compression_dxt1 497 // | Internal format | |W |H | BS |CC| Format | Type | SRGB | Supported | Renderable | Filterable | 498 map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGB_S3TC_DXT1_EXT, CompressedFormat(4, 4, 64, 3, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, false, RequireExtension<&Extensions::textureCompressionDXT1>, NeverSupported, AlwaysSupported ))); 499 map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, CompressedFormat(4, 4, 64, 4, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, GL_UNSIGNED_BYTE, false, RequireExtension<&Extensions::textureCompressionDXT1>, NeverSupported, AlwaysSupported ))); 500 501 // From GL_ANGLE_texture_compression_dxt3 502 map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, CompressedFormat(4, 4, 128, 4, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, GL_UNSIGNED_BYTE, false, RequireExtension<&Extensions::textureCompressionDXT5>, NeverSupported, AlwaysSupported ))); 503 504 // From GL_ANGLE_texture_compression_dxt5 505 map.insert(InternalFormatInfoPair(GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, CompressedFormat(4, 4, 128, 4, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, GL_UNSIGNED_BYTE, false, RequireExtension<&Extensions::textureCompressionDXT5>, NeverSupported, AlwaysSupported ))); 506 507 return map; 508 } 509 510 static const InternalFormatInfoMap &GetInternalFormatMap() 511 { 512 static const InternalFormatInfoMap formatMap = BuildInternalFormatInfoMap(); 513 return formatMap; 514 } 515 516 static FormatSet BuildAllSizedInternalFormatSet() 517 { 518 FormatSet result; 519 520 const InternalFormatInfoMap &formats = GetInternalFormatMap(); 521 for (InternalFormatInfoMap::const_iterator i = formats.begin(); i != formats.end(); i++) 522 { 523 if (i->second.pixelBytes > 0) 524 { 525 result.insert(i->first); 526 } 527 } 528 529 return result; 530 } 531 532 const FormatType &GetFormatTypeInfo(GLenum format, GLenum type) 533 { 534 static const FormatMap formatMap = BuildFormatMap(); 535 FormatMap::const_iterator iter = formatMap.find(FormatTypePair(format, type)); 536 if (iter != formatMap.end()) 537 { 538 return iter->second; 539 } 540 else 541 { 542 static const FormatType defaultInfo; 543 return defaultInfo; 544 } 545 } 546 547 const Type &GetTypeInfo(GLenum type) 548 { 549 static const TypeInfoMap infoMap = BuildTypeInfoMap(); 550 TypeInfoMap::const_iterator iter = infoMap.find(type); 551 if (iter != infoMap.end()) 552 { 553 return iter->second; 554 } 555 else 556 { 557 static const Type defaultInfo; 558 return defaultInfo; 559 } 560 } 561 562 const InternalFormat &GetInternalFormatInfo(GLenum internalFormat) 563 { 564 const InternalFormatInfoMap &formatMap = GetInternalFormatMap(); 565 InternalFormatInfoMap::const_iterator iter = formatMap.find(internalFormat); 566 if (iter != formatMap.end()) 567 { 568 return iter->second; 569 } 570 else 571 { 572 static const InternalFormat defaultInternalFormat; 573 return defaultInternalFormat; 574 } 575 } 576 577 GLuint InternalFormat::computeRowPitch(GLenum type, GLsizei width, GLint alignment) const 578 { 579 ASSERT(alignment > 0 && isPow2(alignment)); 580 return rx::roundUp(computeBlockSize(type, width, 1), static_cast<GLuint>(alignment)); 581 } 582 583 GLuint InternalFormat::computeDepthPitch(GLenum type, GLsizei width, GLsizei height, GLint alignment) const 584 { 585 return computeRowPitch(type, width, alignment) * height; 586 } 587 588 GLuint InternalFormat::computeBlockSize(GLenum type, GLsizei width, GLsizei height) const 589 { 590 if (compressed) 591 { 592 GLsizei numBlocksWide = (width + compressedBlockWidth - 1) / compressedBlockWidth; 593 GLsizei numBlocksHight = (height + compressedBlockHeight - 1) / compressedBlockHeight; 594 return (pixelBytes * numBlocksWide * numBlocksHight); 595 } 596 else 597 { 598 const Type &typeInfo = GetTypeInfo(type); 599 if (typeInfo.specialInterpretation) 600 { 601 return typeInfo.bytes * width * height; 602 } 603 else 604 { 605 return componentCount * typeInfo.bytes * width * height; 606 } 607 } 608 } 609 610 GLenum GetSizedInternalFormat(GLenum internalFormat, GLenum type) 611 { 612 const InternalFormat& formatInfo = GetInternalFormatInfo(internalFormat); 613 return (formatInfo.pixelBytes > 0) ? internalFormat : GetFormatTypeInfo(internalFormat, type).internalFormat; 614 } 615 616 const FormatSet &GetAllSizedInternalFormats() 617 { 618 static FormatSet formatSet = BuildAllSizedInternalFormatSet(); 619 return formatSet; 620 } 621 622 } 623
