1 /*------------------------------------------------------------------------- 2 * drawElements Quality Program Tester Core 3 * ---------------------------------------- 4 * 5 * Copyright 2014 The Android Open Source Project 6 * 7 * Licensed under the Apache License, Version 2.0 (the "License"); 8 * you may not use this file except in compliance with the License. 9 * You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 * 19 *//*! 20 * \file 21 * \brief Compressed Texture Utilities. 22 *//*--------------------------------------------------------------------*/ 23 24 #include "tcuCompressedTexture.hpp" 25 #include "tcuTextureUtil.hpp" 26 #include "tcuAstcUtil.hpp" 27 28 #include "deStringUtil.hpp" 29 #include "deFloat16.h" 30 31 #include <algorithm> 32 33 namespace tcu 34 { 35 36 int getBlockSize (CompressedTexFormat format) 37 { 38 if (isAstcFormat(format)) 39 { 40 return astc::BLOCK_SIZE_BYTES; 41 } 42 else if (isEtcFormat(format)) 43 { 44 switch (format) 45 { 46 case COMPRESSEDTEXFORMAT_ETC1_RGB8: return 8; 47 case COMPRESSEDTEXFORMAT_EAC_R11: return 8; 48 case COMPRESSEDTEXFORMAT_EAC_SIGNED_R11: return 8; 49 case COMPRESSEDTEXFORMAT_EAC_RG11: return 16; 50 case COMPRESSEDTEXFORMAT_EAC_SIGNED_RG11: return 16; 51 case COMPRESSEDTEXFORMAT_ETC2_RGB8: return 8; 52 case COMPRESSEDTEXFORMAT_ETC2_SRGB8: return 8; 53 case COMPRESSEDTEXFORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1: return 8; 54 case COMPRESSEDTEXFORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: return 8; 55 case COMPRESSEDTEXFORMAT_ETC2_EAC_RGBA8: return 16; 56 case COMPRESSEDTEXFORMAT_ETC2_EAC_SRGB8_ALPHA8: return 16; 57 58 default: 59 DE_ASSERT(false); 60 return -1; 61 } 62 } 63 else 64 { 65 DE_ASSERT(false); 66 return -1; 67 } 68 } 69 70 IVec3 getBlockPixelSize (CompressedTexFormat format) 71 { 72 if (isEtcFormat(format)) 73 { 74 return IVec3(4, 4, 1); 75 } 76 else if (isAstcFormat(format)) 77 { 78 switch (format) 79 { 80 case COMPRESSEDTEXFORMAT_ASTC_4x4_RGBA: return IVec3(4, 4, 1); 81 case COMPRESSEDTEXFORMAT_ASTC_5x4_RGBA: return IVec3(5, 4, 1); 82 case COMPRESSEDTEXFORMAT_ASTC_5x5_RGBA: return IVec3(5, 5, 1); 83 case COMPRESSEDTEXFORMAT_ASTC_6x5_RGBA: return IVec3(6, 5, 1); 84 case COMPRESSEDTEXFORMAT_ASTC_6x6_RGBA: return IVec3(6, 6, 1); 85 case COMPRESSEDTEXFORMAT_ASTC_8x5_RGBA: return IVec3(8, 5, 1); 86 case COMPRESSEDTEXFORMAT_ASTC_8x6_RGBA: return IVec3(8, 6, 1); 87 case COMPRESSEDTEXFORMAT_ASTC_8x8_RGBA: return IVec3(8, 8, 1); 88 case COMPRESSEDTEXFORMAT_ASTC_10x5_RGBA: return IVec3(10, 5, 1); 89 case COMPRESSEDTEXFORMAT_ASTC_10x6_RGBA: return IVec3(10, 6, 1); 90 case COMPRESSEDTEXFORMAT_ASTC_10x8_RGBA: return IVec3(10, 8, 1); 91 case COMPRESSEDTEXFORMAT_ASTC_10x10_RGBA: return IVec3(10, 10, 1); 92 case COMPRESSEDTEXFORMAT_ASTC_12x10_RGBA: return IVec3(12, 10, 1); 93 case COMPRESSEDTEXFORMAT_ASTC_12x12_RGBA: return IVec3(12, 12, 1); 94 case COMPRESSEDTEXFORMAT_ASTC_4x4_SRGB8_ALPHA8: return IVec3(4, 4, 1); 95 case COMPRESSEDTEXFORMAT_ASTC_5x4_SRGB8_ALPHA8: return IVec3(5, 4, 1); 96 case COMPRESSEDTEXFORMAT_ASTC_5x5_SRGB8_ALPHA8: return IVec3(5, 5, 1); 97 case COMPRESSEDTEXFORMAT_ASTC_6x5_SRGB8_ALPHA8: return IVec3(6, 5, 1); 98 case COMPRESSEDTEXFORMAT_ASTC_6x6_SRGB8_ALPHA8: return IVec3(6, 6, 1); 99 case COMPRESSEDTEXFORMAT_ASTC_8x5_SRGB8_ALPHA8: return IVec3(8, 5, 1); 100 case COMPRESSEDTEXFORMAT_ASTC_8x6_SRGB8_ALPHA8: return IVec3(8, 6, 1); 101 case COMPRESSEDTEXFORMAT_ASTC_8x8_SRGB8_ALPHA8: return IVec3(8, 8, 1); 102 case COMPRESSEDTEXFORMAT_ASTC_10x5_SRGB8_ALPHA8: return IVec3(10, 5, 1); 103 case COMPRESSEDTEXFORMAT_ASTC_10x6_SRGB8_ALPHA8: return IVec3(10, 6, 1); 104 case COMPRESSEDTEXFORMAT_ASTC_10x8_SRGB8_ALPHA8: return IVec3(10, 8, 1); 105 case COMPRESSEDTEXFORMAT_ASTC_10x10_SRGB8_ALPHA8: return IVec3(10, 10, 1); 106 case COMPRESSEDTEXFORMAT_ASTC_12x10_SRGB8_ALPHA8: return IVec3(12, 10, 1); 107 case COMPRESSEDTEXFORMAT_ASTC_12x12_SRGB8_ALPHA8: return IVec3(12, 12, 1); 108 109 default: 110 DE_ASSERT(false); 111 return IVec3(); 112 } 113 } 114 else 115 { 116 DE_ASSERT(false); 117 return IVec3(-1); 118 } 119 } 120 121 bool isEtcFormat (CompressedTexFormat format) 122 { 123 switch (format) 124 { 125 case COMPRESSEDTEXFORMAT_ETC1_RGB8: 126 case COMPRESSEDTEXFORMAT_EAC_R11: 127 case COMPRESSEDTEXFORMAT_EAC_SIGNED_R11: 128 case COMPRESSEDTEXFORMAT_EAC_RG11: 129 case COMPRESSEDTEXFORMAT_EAC_SIGNED_RG11: 130 case COMPRESSEDTEXFORMAT_ETC2_RGB8: 131 case COMPRESSEDTEXFORMAT_ETC2_SRGB8: 132 case COMPRESSEDTEXFORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1: 133 case COMPRESSEDTEXFORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: 134 case COMPRESSEDTEXFORMAT_ETC2_EAC_RGBA8: 135 case COMPRESSEDTEXFORMAT_ETC2_EAC_SRGB8_ALPHA8: 136 return true; 137 138 default: 139 return false; 140 } 141 } 142 143 bool isAstcFormat (CompressedTexFormat format) 144 { 145 switch (format) 146 { 147 case COMPRESSEDTEXFORMAT_ASTC_4x4_RGBA: 148 case COMPRESSEDTEXFORMAT_ASTC_5x4_RGBA: 149 case COMPRESSEDTEXFORMAT_ASTC_5x5_RGBA: 150 case COMPRESSEDTEXFORMAT_ASTC_6x5_RGBA: 151 case COMPRESSEDTEXFORMAT_ASTC_6x6_RGBA: 152 case COMPRESSEDTEXFORMAT_ASTC_8x5_RGBA: 153 case COMPRESSEDTEXFORMAT_ASTC_8x6_RGBA: 154 case COMPRESSEDTEXFORMAT_ASTC_8x8_RGBA: 155 case COMPRESSEDTEXFORMAT_ASTC_10x5_RGBA: 156 case COMPRESSEDTEXFORMAT_ASTC_10x6_RGBA: 157 case COMPRESSEDTEXFORMAT_ASTC_10x8_RGBA: 158 case COMPRESSEDTEXFORMAT_ASTC_10x10_RGBA: 159 case COMPRESSEDTEXFORMAT_ASTC_12x10_RGBA: 160 case COMPRESSEDTEXFORMAT_ASTC_12x12_RGBA: 161 case COMPRESSEDTEXFORMAT_ASTC_4x4_SRGB8_ALPHA8: 162 case COMPRESSEDTEXFORMAT_ASTC_5x4_SRGB8_ALPHA8: 163 case COMPRESSEDTEXFORMAT_ASTC_5x5_SRGB8_ALPHA8: 164 case COMPRESSEDTEXFORMAT_ASTC_6x5_SRGB8_ALPHA8: 165 case COMPRESSEDTEXFORMAT_ASTC_6x6_SRGB8_ALPHA8: 166 case COMPRESSEDTEXFORMAT_ASTC_8x5_SRGB8_ALPHA8: 167 case COMPRESSEDTEXFORMAT_ASTC_8x6_SRGB8_ALPHA8: 168 case COMPRESSEDTEXFORMAT_ASTC_8x8_SRGB8_ALPHA8: 169 case COMPRESSEDTEXFORMAT_ASTC_10x5_SRGB8_ALPHA8: 170 case COMPRESSEDTEXFORMAT_ASTC_10x6_SRGB8_ALPHA8: 171 case COMPRESSEDTEXFORMAT_ASTC_10x8_SRGB8_ALPHA8: 172 case COMPRESSEDTEXFORMAT_ASTC_10x10_SRGB8_ALPHA8: 173 case COMPRESSEDTEXFORMAT_ASTC_12x10_SRGB8_ALPHA8: 174 case COMPRESSEDTEXFORMAT_ASTC_12x12_SRGB8_ALPHA8: 175 return true; 176 177 default: 178 return false; 179 } 180 } 181 182 bool isAstcSRGBFormat (CompressedTexFormat format) 183 { 184 switch (format) 185 { 186 case COMPRESSEDTEXFORMAT_ASTC_4x4_SRGB8_ALPHA8: 187 case COMPRESSEDTEXFORMAT_ASTC_5x4_SRGB8_ALPHA8: 188 case COMPRESSEDTEXFORMAT_ASTC_5x5_SRGB8_ALPHA8: 189 case COMPRESSEDTEXFORMAT_ASTC_6x5_SRGB8_ALPHA8: 190 case COMPRESSEDTEXFORMAT_ASTC_6x6_SRGB8_ALPHA8: 191 case COMPRESSEDTEXFORMAT_ASTC_8x5_SRGB8_ALPHA8: 192 case COMPRESSEDTEXFORMAT_ASTC_8x6_SRGB8_ALPHA8: 193 case COMPRESSEDTEXFORMAT_ASTC_8x8_SRGB8_ALPHA8: 194 case COMPRESSEDTEXFORMAT_ASTC_10x5_SRGB8_ALPHA8: 195 case COMPRESSEDTEXFORMAT_ASTC_10x6_SRGB8_ALPHA8: 196 case COMPRESSEDTEXFORMAT_ASTC_10x8_SRGB8_ALPHA8: 197 case COMPRESSEDTEXFORMAT_ASTC_10x10_SRGB8_ALPHA8: 198 case COMPRESSEDTEXFORMAT_ASTC_12x10_SRGB8_ALPHA8: 199 case COMPRESSEDTEXFORMAT_ASTC_12x12_SRGB8_ALPHA8: 200 return true; 201 202 default: 203 return false; 204 } 205 } 206 207 TextureFormat getUncompressedFormat (CompressedTexFormat format) 208 { 209 if (isEtcFormat(format)) 210 { 211 switch (format) 212 { 213 case COMPRESSEDTEXFORMAT_ETC1_RGB8: return TextureFormat(TextureFormat::RGB, TextureFormat::UNORM_INT8); 214 case COMPRESSEDTEXFORMAT_EAC_R11: return TextureFormat(TextureFormat::R, TextureFormat::UNORM_INT16); 215 case COMPRESSEDTEXFORMAT_EAC_SIGNED_R11: return TextureFormat(TextureFormat::R, TextureFormat::SNORM_INT16); 216 case COMPRESSEDTEXFORMAT_EAC_RG11: return TextureFormat(TextureFormat::RG, TextureFormat::UNORM_INT16); 217 case COMPRESSEDTEXFORMAT_EAC_SIGNED_RG11: return TextureFormat(TextureFormat::RG, TextureFormat::SNORM_INT16); 218 case COMPRESSEDTEXFORMAT_ETC2_RGB8: return TextureFormat(TextureFormat::RGB, TextureFormat::UNORM_INT8); 219 case COMPRESSEDTEXFORMAT_ETC2_SRGB8: return TextureFormat(TextureFormat::sRGB, TextureFormat::UNORM_INT8); 220 case COMPRESSEDTEXFORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1: return TextureFormat(TextureFormat::RGBA, TextureFormat::UNORM_INT8); 221 case COMPRESSEDTEXFORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: return TextureFormat(TextureFormat::sRGBA, TextureFormat::UNORM_INT8); 222 case COMPRESSEDTEXFORMAT_ETC2_EAC_RGBA8: return TextureFormat(TextureFormat::RGBA, TextureFormat::UNORM_INT8); 223 case COMPRESSEDTEXFORMAT_ETC2_EAC_SRGB8_ALPHA8: return TextureFormat(TextureFormat::sRGBA, TextureFormat::UNORM_INT8); 224 225 default: 226 DE_ASSERT(false); 227 return TextureFormat(); 228 } 229 } 230 else if (isAstcFormat(format)) 231 { 232 if (isAstcSRGBFormat(format)) 233 return TextureFormat(TextureFormat::sRGBA, TextureFormat::UNORM_INT8); 234 else 235 return TextureFormat(TextureFormat::RGBA, TextureFormat::HALF_FLOAT); 236 } 237 else 238 { 239 DE_ASSERT(false); 240 return TextureFormat(); 241 } 242 } 243 244 CompressedTexFormat getAstcFormatByBlockSize (const IVec3& size, bool isSRGB) 245 { 246 if (size.z() > 1) 247 throw InternalError("3D ASTC textures not currently supported"); 248 249 for (int fmtI = 0; fmtI < COMPRESSEDTEXFORMAT_LAST; fmtI++) 250 { 251 const CompressedTexFormat fmt = (CompressedTexFormat)fmtI; 252 253 if (isAstcFormat(fmt) && getBlockPixelSize(fmt) == size && isAstcSRGBFormat(fmt) == isSRGB) 254 return fmt; 255 } 256 257 throw InternalError("Invalid ASTC block size " + de::toString(size.x()) + "x" + de::toString(size.y()) + "x" + de::toString(size.z())); 258 } 259 260 namespace 261 { 262 263 // \todo [2013-08-06 nuutti] ETC and ASTC decompression codes are rather unrelated, and are already in their own "private" namespaces - should this be split to multiple files? 264 265 namespace EtcDecompressInternal 266 { 267 268 enum 269 { 270 ETC2_BLOCK_WIDTH = 4, 271 ETC2_BLOCK_HEIGHT = 4, 272 ETC2_UNCOMPRESSED_PIXEL_SIZE_A8 = 1, 273 ETC2_UNCOMPRESSED_PIXEL_SIZE_R11 = 2, 274 ETC2_UNCOMPRESSED_PIXEL_SIZE_RG11 = 4, 275 ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8 = 3, 276 ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8 = 4, 277 ETC2_UNCOMPRESSED_BLOCK_SIZE_A8 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8, 278 ETC2_UNCOMPRESSED_BLOCK_SIZE_R11 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11, 279 ETC2_UNCOMPRESSED_BLOCK_SIZE_RG11 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_RG11, 280 ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8, 281 ETC2_UNCOMPRESSED_BLOCK_SIZE_RGBA8 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8 282 }; 283 284 inline deUint64 get64BitBlock (const deUint8* src, int blockNdx) 285 { 286 // Stored in big-endian form. 287 deUint64 block = 0; 288 289 for (int i = 0; i < 8; i++) 290 block = (block << 8ull) | (deUint64)(src[blockNdx*8+i]); 291 292 return block; 293 } 294 295 // Return the first 64 bits of a 128 bit block. 296 inline deUint64 get128BitBlockStart (const deUint8* src, int blockNdx) 297 { 298 return get64BitBlock(src, 2*blockNdx); 299 } 300 301 // Return the last 64 bits of a 128 bit block. 302 inline deUint64 get128BitBlockEnd (const deUint8* src, int blockNdx) 303 { 304 return get64BitBlock(src, 2*blockNdx + 1); 305 } 306 307 inline deUint32 getBit (deUint64 src, int bit) 308 { 309 return (src >> bit) & 1; 310 } 311 312 inline deUint32 getBits (deUint64 src, int low, int high) 313 { 314 const int numBits = (high-low) + 1; 315 DE_ASSERT(de::inRange(numBits, 1, 32)); 316 if (numBits < 32) 317 return (deUint32)((src >> low) & ((1u<<numBits)-1)); 318 else 319 return (deUint32)((src >> low) & 0xFFFFFFFFu); 320 } 321 322 inline deUint8 extend4To8 (deUint8 src) 323 { 324 DE_ASSERT((src & ~((1<<4)-1)) == 0); 325 return (deUint8)((src << 4) | src); 326 } 327 328 inline deUint8 extend5To8 (deUint8 src) 329 { 330 DE_ASSERT((src & ~((1<<5)-1)) == 0); 331 return (deUint8)((src << 3) | (src >> 2)); 332 } 333 334 inline deUint8 extend6To8 (deUint8 src) 335 { 336 DE_ASSERT((src & ~((1<<6)-1)) == 0); 337 return (deUint8)((src << 2) | (src >> 4)); 338 } 339 340 inline deUint8 extend7To8 (deUint8 src) 341 { 342 DE_ASSERT((src & ~((1<<7)-1)) == 0); 343 return (deUint8)((src << 1) | (src >> 6)); 344 } 345 346 inline deInt8 extendSigned3To8 (deUint8 src) 347 { 348 const bool isNeg = (src & (1<<2)) != 0; 349 return (deInt8)((isNeg ? ~((1<<3)-1) : 0) | src); 350 } 351 352 inline deUint8 extend5Delta3To8 (deUint8 base5, deUint8 delta3) 353 { 354 const deUint8 t = (deUint8)((deInt8)base5 + extendSigned3To8(delta3)); 355 return extend5To8(t); 356 } 357 358 inline deUint16 extend11To16 (deUint16 src) 359 { 360 DE_ASSERT((src & ~((1<<11)-1)) == 0); 361 return (deUint16)((src << 5) | (src >> 6)); 362 } 363 364 inline deInt16 extend11To16WithSign (deInt16 src) 365 { 366 if (src < 0) 367 return (deInt16)(-(deInt16)extend11To16((deUint16)(-src))); 368 else 369 return (deInt16)extend11To16(src); 370 } 371 372 void decompressETC1Block (deUint8 dst[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8], deUint64 src) 373 { 374 const int diffBit = (int)getBit(src, 33); 375 const int flipBit = (int)getBit(src, 32); 376 const deUint32 table[2] = { getBits(src, 37, 39), getBits(src, 34, 36) }; 377 deUint8 baseR[2]; 378 deUint8 baseG[2]; 379 deUint8 baseB[2]; 380 381 if (diffBit == 0) 382 { 383 // Individual mode. 384 baseR[0] = extend4To8((deUint8)getBits(src, 60, 63)); 385 baseR[1] = extend4To8((deUint8)getBits(src, 56, 59)); 386 baseG[0] = extend4To8((deUint8)getBits(src, 52, 55)); 387 baseG[1] = extend4To8((deUint8)getBits(src, 48, 51)); 388 baseB[0] = extend4To8((deUint8)getBits(src, 44, 47)); 389 baseB[1] = extend4To8((deUint8)getBits(src, 40, 43)); 390 } 391 else 392 { 393 // Differential mode (diffBit == 1). 394 deUint8 bR = (deUint8)getBits(src, 59, 63); // 5b 395 deUint8 dR = (deUint8)getBits(src, 56, 58); // 3b 396 deUint8 bG = (deUint8)getBits(src, 51, 55); 397 deUint8 dG = (deUint8)getBits(src, 48, 50); 398 deUint8 bB = (deUint8)getBits(src, 43, 47); 399 deUint8 dB = (deUint8)getBits(src, 40, 42); 400 401 baseR[0] = extend5To8(bR); 402 baseG[0] = extend5To8(bG); 403 baseB[0] = extend5To8(bB); 404 405 baseR[1] = extend5Delta3To8(bR, dR); 406 baseG[1] = extend5Delta3To8(bG, dG); 407 baseB[1] = extend5Delta3To8(bB, dB); 408 } 409 410 static const int modifierTable[8][4] = 411 { 412 // 00 01 10 11 413 { 2, 8, -2, -8 }, 414 { 5, 17, -5, -17 }, 415 { 9, 29, -9, -29 }, 416 { 13, 42, -13, -42 }, 417 { 18, 60, -18, -60 }, 418 { 24, 80, -24, -80 }, 419 { 33, 106, -33, -106 }, 420 { 47, 183, -47, -183 } 421 }; 422 423 // Write final pixels. 424 for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++) 425 { 426 const int x = pixelNdx / ETC2_BLOCK_HEIGHT; 427 const int y = pixelNdx % ETC2_BLOCK_HEIGHT; 428 const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8; 429 const int subBlock = ((flipBit ? y : x) >= 2) ? 1 : 0; 430 const deUint32 tableNdx = table[subBlock]; 431 const deUint32 modifierNdx = (getBit(src, 16+pixelNdx) << 1) | getBit(src, pixelNdx); 432 const int modifier = modifierTable[tableNdx][modifierNdx]; 433 434 dst[dstOffset+0] = (deUint8)deClamp32((int)baseR[subBlock] + modifier, 0, 255); 435 dst[dstOffset+1] = (deUint8)deClamp32((int)baseG[subBlock] + modifier, 0, 255); 436 dst[dstOffset+2] = (deUint8)deClamp32((int)baseB[subBlock] + modifier, 0, 255); 437 } 438 } 439 440 // if alphaMode is true, do PUNCHTHROUGH and store alpha to alphaDst; otherwise do ordinary ETC2 RGB8. 441 void decompressETC2Block (deUint8 dst[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8], deUint64 src, deUint8 alphaDst[ETC2_UNCOMPRESSED_BLOCK_SIZE_A8], bool alphaMode) 442 { 443 enum Etc2Mode 444 { 445 MODE_INDIVIDUAL = 0, 446 MODE_DIFFERENTIAL, 447 MODE_T, 448 MODE_H, 449 MODE_PLANAR, 450 451 MODE_LAST 452 }; 453 454 const int diffOpaqueBit = (int)getBit(src, 33); 455 const deInt8 selBR = (deInt8)getBits(src, 59, 63); // 5 bits. 456 const deInt8 selBG = (deInt8)getBits(src, 51, 55); 457 const deInt8 selBB = (deInt8)getBits(src, 43, 47); 458 const deInt8 selDR = extendSigned3To8((deUint8)getBits(src, 56, 58)); // 3 bits. 459 const deInt8 selDG = extendSigned3To8((deUint8)getBits(src, 48, 50)); 460 const deInt8 selDB = extendSigned3To8((deUint8)getBits(src, 40, 42)); 461 Etc2Mode mode; 462 463 if (!alphaMode && diffOpaqueBit == 0) 464 mode = MODE_INDIVIDUAL; 465 else if (!de::inRange(selBR + selDR, 0, 31)) 466 mode = MODE_T; 467 else if (!de::inRange(selBG + selDG, 0, 31)) 468 mode = MODE_H; 469 else if (!de::inRange(selBB + selDB, 0, 31)) 470 mode = MODE_PLANAR; 471 else 472 mode = MODE_DIFFERENTIAL; 473 474 if (mode == MODE_INDIVIDUAL || mode == MODE_DIFFERENTIAL) 475 { 476 // Individual and differential modes have some steps in common, handle them here. 477 static const int modifierTable[8][4] = 478 { 479 // 00 01 10 11 480 { 2, 8, -2, -8 }, 481 { 5, 17, -5, -17 }, 482 { 9, 29, -9, -29 }, 483 { 13, 42, -13, -42 }, 484 { 18, 60, -18, -60 }, 485 { 24, 80, -24, -80 }, 486 { 33, 106, -33, -106 }, 487 { 47, 183, -47, -183 } 488 }; 489 490 const int flipBit = (int)getBit(src, 32); 491 const deUint32 table[2] = { getBits(src, 37, 39), getBits(src, 34, 36) }; 492 deUint8 baseR[2]; 493 deUint8 baseG[2]; 494 deUint8 baseB[2]; 495 496 if (mode == MODE_INDIVIDUAL) 497 { 498 // Individual mode, initial values. 499 baseR[0] = extend4To8((deUint8)getBits(src, 60, 63)); 500 baseR[1] = extend4To8((deUint8)getBits(src, 56, 59)); 501 baseG[0] = extend4To8((deUint8)getBits(src, 52, 55)); 502 baseG[1] = extend4To8((deUint8)getBits(src, 48, 51)); 503 baseB[0] = extend4To8((deUint8)getBits(src, 44, 47)); 504 baseB[1] = extend4To8((deUint8)getBits(src, 40, 43)); 505 } 506 else 507 { 508 // Differential mode, initial values. 509 baseR[0] = extend5To8(selBR); 510 baseG[0] = extend5To8(selBG); 511 baseB[0] = extend5To8(selBB); 512 513 baseR[1] = extend5To8((deUint8)(selBR + selDR)); 514 baseG[1] = extend5To8((deUint8)(selBG + selDG)); 515 baseB[1] = extend5To8((deUint8)(selBB + selDB)); 516 } 517 518 // Write final pixels for individual or differential mode. 519 for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++) 520 { 521 const int x = pixelNdx / ETC2_BLOCK_HEIGHT; 522 const int y = pixelNdx % ETC2_BLOCK_HEIGHT; 523 const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8; 524 const int subBlock = ((flipBit ? y : x) >= 2) ? 1 : 0; 525 const deUint32 tableNdx = table[subBlock]; 526 const deUint32 modifierNdx = (getBit(src, 16+pixelNdx) << 1) | getBit(src, pixelNdx); 527 const int alphaDstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8; // Only needed for PUNCHTHROUGH version. 528 529 // If doing PUNCHTHROUGH version (alphaMode), opaque bit may affect colors. 530 if (alphaMode && diffOpaqueBit == 0 && modifierNdx == 2) 531 { 532 dst[dstOffset+0] = 0; 533 dst[dstOffset+1] = 0; 534 dst[dstOffset+2] = 0; 535 alphaDst[alphaDstOffset] = 0; 536 } 537 else 538 { 539 int modifier; 540 541 // PUNCHTHROUGH version and opaque bit may also affect modifiers. 542 if (alphaMode && diffOpaqueBit == 0 && (modifierNdx == 0 || modifierNdx == 2)) 543 modifier = 0; 544 else 545 modifier = modifierTable[tableNdx][modifierNdx]; 546 547 dst[dstOffset+0] = (deUint8)deClamp32((int)baseR[subBlock] + modifier, 0, 255); 548 dst[dstOffset+1] = (deUint8)deClamp32((int)baseG[subBlock] + modifier, 0, 255); 549 dst[dstOffset+2] = (deUint8)deClamp32((int)baseB[subBlock] + modifier, 0, 255); 550 551 if (alphaMode) 552 alphaDst[alphaDstOffset] = 255; 553 } 554 } 555 } 556 else if (mode == MODE_T || mode == MODE_H) 557 { 558 // T and H modes have some steps in common, handle them here. 559 static const int distTable[8] = { 3, 6, 11, 16, 23, 32, 41, 64 }; 560 561 deUint8 paintR[4]; 562 deUint8 paintG[4]; 563 deUint8 paintB[4]; 564 565 if (mode == MODE_T) 566 { 567 // T mode, calculate paint values. 568 const deUint8 R1a = (deUint8)getBits(src, 59, 60); 569 const deUint8 R1b = (deUint8)getBits(src, 56, 57); 570 const deUint8 G1 = (deUint8)getBits(src, 52, 55); 571 const deUint8 B1 = (deUint8)getBits(src, 48, 51); 572 const deUint8 R2 = (deUint8)getBits(src, 44, 47); 573 const deUint8 G2 = (deUint8)getBits(src, 40, 43); 574 const deUint8 B2 = (deUint8)getBits(src, 36, 39); 575 const deUint32 distNdx = (getBits(src, 34, 35) << 1) | getBit(src, 32); 576 const int dist = distTable[distNdx]; 577 578 paintR[0] = extend4To8((deUint8)((R1a << 2) | R1b)); 579 paintG[0] = extend4To8(G1); 580 paintB[0] = extend4To8(B1); 581 paintR[2] = extend4To8(R2); 582 paintG[2] = extend4To8(G2); 583 paintB[2] = extend4To8(B2); 584 paintR[1] = (deUint8)deClamp32((int)paintR[2] + dist, 0, 255); 585 paintG[1] = (deUint8)deClamp32((int)paintG[2] + dist, 0, 255); 586 paintB[1] = (deUint8)deClamp32((int)paintB[2] + dist, 0, 255); 587 paintR[3] = (deUint8)deClamp32((int)paintR[2] - dist, 0, 255); 588 paintG[3] = (deUint8)deClamp32((int)paintG[2] - dist, 0, 255); 589 paintB[3] = (deUint8)deClamp32((int)paintB[2] - dist, 0, 255); 590 } 591 else 592 { 593 // H mode, calculate paint values. 594 const deUint8 R1 = (deUint8)getBits(src, 59, 62); 595 const deUint8 G1a = (deUint8)getBits(src, 56, 58); 596 const deUint8 G1b = (deUint8)getBit(src, 52); 597 const deUint8 B1a = (deUint8)getBit(src, 51); 598 const deUint8 B1b = (deUint8)getBits(src, 47, 49); 599 const deUint8 R2 = (deUint8)getBits(src, 43, 46); 600 const deUint8 G2 = (deUint8)getBits(src, 39, 42); 601 const deUint8 B2 = (deUint8)getBits(src, 35, 38); 602 deUint8 baseR[2]; 603 deUint8 baseG[2]; 604 deUint8 baseB[2]; 605 deUint32 baseValue[2]; 606 deUint32 distNdx; 607 int dist; 608 609 baseR[0] = extend4To8(R1); 610 baseG[0] = extend4To8((deUint8)((G1a << 1) | G1b)); 611 baseB[0] = extend4To8((deUint8)((B1a << 3) | B1b)); 612 baseR[1] = extend4To8(R2); 613 baseG[1] = extend4To8(G2); 614 baseB[1] = extend4To8(B2); 615 baseValue[0] = (((deUint32)baseR[0]) << 16) | (((deUint32)baseG[0]) << 8) | baseB[0]; 616 baseValue[1] = (((deUint32)baseR[1]) << 16) | (((deUint32)baseG[1]) << 8) | baseB[1]; 617 distNdx = (getBit(src, 34) << 2) | (getBit(src, 32) << 1) | (deUint32)(baseValue[0] >= baseValue[1]); 618 dist = distTable[distNdx]; 619 620 paintR[0] = (deUint8)deClamp32((int)baseR[0] + dist, 0, 255); 621 paintG[0] = (deUint8)deClamp32((int)baseG[0] + dist, 0, 255); 622 paintB[0] = (deUint8)deClamp32((int)baseB[0] + dist, 0, 255); 623 paintR[1] = (deUint8)deClamp32((int)baseR[0] - dist, 0, 255); 624 paintG[1] = (deUint8)deClamp32((int)baseG[0] - dist, 0, 255); 625 paintB[1] = (deUint8)deClamp32((int)baseB[0] - dist, 0, 255); 626 paintR[2] = (deUint8)deClamp32((int)baseR[1] + dist, 0, 255); 627 paintG[2] = (deUint8)deClamp32((int)baseG[1] + dist, 0, 255); 628 paintB[2] = (deUint8)deClamp32((int)baseB[1] + dist, 0, 255); 629 paintR[3] = (deUint8)deClamp32((int)baseR[1] - dist, 0, 255); 630 paintG[3] = (deUint8)deClamp32((int)baseG[1] - dist, 0, 255); 631 paintB[3] = (deUint8)deClamp32((int)baseB[1] - dist, 0, 255); 632 } 633 634 // Write final pixels for T or H mode. 635 for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++) 636 { 637 const int x = pixelNdx / ETC2_BLOCK_HEIGHT; 638 const int y = pixelNdx % ETC2_BLOCK_HEIGHT; 639 const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8; 640 const deUint32 paintNdx = (getBit(src, 16+pixelNdx) << 1) | getBit(src, pixelNdx); 641 const int alphaDstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8; // Only needed for PUNCHTHROUGH version. 642 643 if (alphaMode && diffOpaqueBit == 0 && paintNdx == 2) 644 { 645 dst[dstOffset+0] = 0; 646 dst[dstOffset+1] = 0; 647 dst[dstOffset+2] = 0; 648 alphaDst[alphaDstOffset] = 0; 649 } 650 else 651 { 652 dst[dstOffset+0] = (deUint8)deClamp32((int)paintR[paintNdx], 0, 255); 653 dst[dstOffset+1] = (deUint8)deClamp32((int)paintG[paintNdx], 0, 255); 654 dst[dstOffset+2] = (deUint8)deClamp32((int)paintB[paintNdx], 0, 255); 655 656 if (alphaMode) 657 alphaDst[alphaDstOffset] = 255; 658 } 659 } 660 } 661 else 662 { 663 // Planar mode. 664 const deUint8 GO1 = (deUint8)getBit(src, 56); 665 const deUint8 GO2 = (deUint8)getBits(src, 49, 54); 666 const deUint8 BO1 = (deUint8)getBit(src, 48); 667 const deUint8 BO2 = (deUint8)getBits(src, 43, 44); 668 const deUint8 BO3 = (deUint8)getBits(src, 39, 41); 669 const deUint8 RH1 = (deUint8)getBits(src, 34, 38); 670 const deUint8 RH2 = (deUint8)getBit(src, 32); 671 const deUint8 RO = extend6To8((deUint8)getBits(src, 57, 62)); 672 const deUint8 GO = extend7To8((deUint8)((GO1 << 6) | GO2)); 673 const deUint8 BO = extend6To8((deUint8)((BO1 << 5) | (BO2 << 3) | BO3)); 674 const deUint8 RH = extend6To8((deUint8)((RH1 << 1) | RH2)); 675 const deUint8 GH = extend7To8((deUint8)getBits(src, 25, 31)); 676 const deUint8 BH = extend6To8((deUint8)getBits(src, 19, 24)); 677 const deUint8 RV = extend6To8((deUint8)getBits(src, 13, 18)); 678 const deUint8 GV = extend7To8((deUint8)getBits(src, 6, 12)); 679 const deUint8 BV = extend6To8((deUint8)getBits(src, 0, 5)); 680 681 // Write final pixels for planar mode. 682 for (int y = 0; y < 4; y++) 683 { 684 for (int x = 0; x < 4; x++) 685 { 686 const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8; 687 const int unclampedR = (x * ((int)RH-(int)RO) + y * ((int)RV-(int)RO) + 4*(int)RO + 2) >> 2; 688 const int unclampedG = (x * ((int)GH-(int)GO) + y * ((int)GV-(int)GO) + 4*(int)GO + 2) >> 2; 689 const int unclampedB = (x * ((int)BH-(int)BO) + y * ((int)BV-(int)BO) + 4*(int)BO + 2) >> 2; 690 const int alphaDstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8; // Only needed for PUNCHTHROUGH version. 691 692 dst[dstOffset+0] = (deUint8)deClamp32(unclampedR, 0, 255); 693 dst[dstOffset+1] = (deUint8)deClamp32(unclampedG, 0, 255); 694 dst[dstOffset+2] = (deUint8)deClamp32(unclampedB, 0, 255); 695 696 if (alphaMode) 697 alphaDst[alphaDstOffset] = 255; 698 } 699 } 700 } 701 } 702 703 void decompressEAC8Block (deUint8 dst[ETC2_UNCOMPRESSED_BLOCK_SIZE_A8], deUint64 src) 704 { 705 static const int modifierTable[16][8] = 706 { 707 {-3, -6, -9, -15, 2, 5, 8, 14}, 708 {-3, -7, -10, -13, 2, 6, 9, 12}, 709 {-2, -5, -8, -13, 1, 4, 7, 12}, 710 {-2, -4, -6, -13, 1, 3, 5, 12}, 711 {-3, -6, -8, -12, 2, 5, 7, 11}, 712 {-3, -7, -9, -11, 2, 6, 8, 10}, 713 {-4, -7, -8, -11, 3, 6, 7, 10}, 714 {-3, -5, -8, -11, 2, 4, 7, 10}, 715 {-2, -6, -8, -10, 1, 5, 7, 9}, 716 {-2, -5, -8, -10, 1, 4, 7, 9}, 717 {-2, -4, -8, -10, 1, 3, 7, 9}, 718 {-2, -5, -7, -10, 1, 4, 6, 9}, 719 {-3, -4, -7, -10, 2, 3, 6, 9}, 720 {-1, -2, -3, -10, 0, 1, 2, 9}, 721 {-4, -6, -8, -9, 3, 5, 7, 8}, 722 {-3, -5, -7, -9, 2, 4, 6, 8} 723 }; 724 725 const deUint8 baseCodeword = (deUint8)getBits(src, 56, 63); 726 const deUint8 multiplier = (deUint8)getBits(src, 52, 55); 727 const deUint32 tableNdx = getBits(src, 48, 51); 728 729 for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++) 730 { 731 const int x = pixelNdx / ETC2_BLOCK_HEIGHT; 732 const int y = pixelNdx % ETC2_BLOCK_HEIGHT; 733 const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8; 734 const int pixelBitNdx = 45 - 3*pixelNdx; 735 const deUint32 modifierNdx = (getBit(src, pixelBitNdx + 2) << 2) | (getBit(src, pixelBitNdx + 1) << 1) | getBit(src, pixelBitNdx); 736 const int modifier = modifierTable[tableNdx][modifierNdx]; 737 738 dst[dstOffset] = (deUint8)deClamp32((int)baseCodeword + (int)multiplier*modifier, 0, 255); 739 } 740 } 741 742 void decompressEAC11Block (deUint8 dst[ETC2_UNCOMPRESSED_BLOCK_SIZE_R11], deUint64 src, bool signedMode) 743 { 744 static const int modifierTable[16][8] = 745 { 746 {-3, -6, -9, -15, 2, 5, 8, 14}, 747 {-3, -7, -10, -13, 2, 6, 9, 12}, 748 {-2, -5, -8, -13, 1, 4, 7, 12}, 749 {-2, -4, -6, -13, 1, 3, 5, 12}, 750 {-3, -6, -8, -12, 2, 5, 7, 11}, 751 {-3, -7, -9, -11, 2, 6, 8, 10}, 752 {-4, -7, -8, -11, 3, 6, 7, 10}, 753 {-3, -5, -8, -11, 2, 4, 7, 10}, 754 {-2, -6, -8, -10, 1, 5, 7, 9}, 755 {-2, -5, -8, -10, 1, 4, 7, 9}, 756 {-2, -4, -8, -10, 1, 3, 7, 9}, 757 {-2, -5, -7, -10, 1, 4, 6, 9}, 758 {-3, -4, -7, -10, 2, 3, 6, 9}, 759 {-1, -2, -3, -10, 0, 1, 2, 9}, 760 {-4, -6, -8, -9, 3, 5, 7, 8}, 761 {-3, -5, -7, -9, 2, 4, 6, 8} 762 }; 763 764 const deInt32 multiplier = (deInt32)getBits(src, 52, 55); 765 const deInt32 tableNdx = (deInt32)getBits(src, 48, 51); 766 deInt32 baseCodeword = (deInt32)getBits(src, 56, 63); 767 768 if (signedMode) 769 { 770 if (baseCodeword > 127) 771 baseCodeword -= 256; 772 if (baseCodeword == -128) 773 baseCodeword = -127; 774 } 775 776 for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++) 777 { 778 const int x = pixelNdx / ETC2_BLOCK_HEIGHT; 779 const int y = pixelNdx % ETC2_BLOCK_HEIGHT; 780 const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11; 781 const int pixelBitNdx = 45 - 3*pixelNdx; 782 const deUint32 modifierNdx = (getBit(src, pixelBitNdx + 2) << 2) | (getBit(src, pixelBitNdx + 1) << 1) | getBit(src, pixelBitNdx); 783 const int modifier = modifierTable[tableNdx][modifierNdx]; 784 785 if (signedMode) 786 { 787 deInt16 value; 788 789 if (multiplier != 0) 790 value = (deInt16)deClamp32(baseCodeword*8 + multiplier*modifier*8, -1023, 1023); 791 else 792 value = (deInt16)deClamp32(baseCodeword*8 + modifier, -1023, 1023); 793 794 *((deInt16*)(dst + dstOffset)) = value; 795 } 796 else 797 { 798 deUint16 value; 799 800 if (multiplier != 0) 801 value = (deUint16)deClamp32(baseCodeword*8 + 4 + multiplier*modifier*8, 0, 2047); 802 else 803 value= (deUint16)deClamp32(baseCodeword*8 + 4 + modifier, 0, 2047); 804 805 *((deUint16*)(dst + dstOffset)) = value; 806 } 807 } 808 } 809 810 } // EtcDecompressInternal 811 812 void decompressETC1 (const PixelBufferAccess& dst, const deUint8* src) 813 { 814 using namespace EtcDecompressInternal; 815 816 deUint8* const dstPtr = (deUint8*)dst.getDataPtr(); 817 const deUint64 compressedBlock = get64BitBlock(src, 0); 818 819 decompressETC1Block(dstPtr, compressedBlock); 820 } 821 822 void decompressETC2 (const PixelBufferAccess& dst, const deUint8* src) 823 { 824 using namespace EtcDecompressInternal; 825 826 deUint8* const dstPtr = (deUint8*)dst.getDataPtr(); 827 const deUint64 compressedBlock = get64BitBlock(src, 0); 828 829 decompressETC2Block(dstPtr, compressedBlock, NULL, false); 830 } 831 832 void decompressETC2_EAC_RGBA8 (const PixelBufferAccess& dst, const deUint8* src) 833 { 834 using namespace EtcDecompressInternal; 835 836 deUint8* const dstPtr = (deUint8*)dst.getDataPtr(); 837 const int dstRowPitch = dst.getRowPitch(); 838 const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8; 839 840 const deUint64 compressedBlockAlpha = get128BitBlockStart(src, 0); 841 const deUint64 compressedBlockRGB = get128BitBlockEnd(src, 0); 842 deUint8 uncompressedBlockAlpha[ETC2_UNCOMPRESSED_BLOCK_SIZE_A8]; 843 deUint8 uncompressedBlockRGB[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8]; 844 845 // Decompress. 846 decompressETC2Block(uncompressedBlockRGB, compressedBlockRGB, NULL, false); 847 decompressEAC8Block(uncompressedBlockAlpha, compressedBlockAlpha); 848 849 // Write to dst. 850 for (int y = 0; y < (int)ETC2_BLOCK_HEIGHT; y++) 851 { 852 for (int x = 0; x < (int)ETC2_BLOCK_WIDTH; x++) 853 { 854 const deUint8* const srcPixelRGB = &uncompressedBlockRGB[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8]; 855 const deUint8* const srcPixelAlpha = &uncompressedBlockAlpha[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8]; 856 deUint8* const dstPixel = dstPtr + y*dstRowPitch + x*dstPixelSize; 857 858 DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8 == 4); 859 dstPixel[0] = srcPixelRGB[0]; 860 dstPixel[1] = srcPixelRGB[1]; 861 dstPixel[2] = srcPixelRGB[2]; 862 dstPixel[3] = srcPixelAlpha[0]; 863 } 864 } 865 } 866 867 void decompressETC2_RGB8_PUNCHTHROUGH_ALPHA1 (const PixelBufferAccess& dst, const deUint8* src) 868 { 869 using namespace EtcDecompressInternal; 870 871 deUint8* const dstPtr = (deUint8*)dst.getDataPtr(); 872 const int dstRowPitch = dst.getRowPitch(); 873 const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8; 874 875 const deUint64 compressedBlockRGBA = get64BitBlock(src, 0); 876 deUint8 uncompressedBlockRGB[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8]; 877 deUint8 uncompressedBlockAlpha[ETC2_UNCOMPRESSED_BLOCK_SIZE_A8]; 878 879 // Decompress. 880 decompressETC2Block(uncompressedBlockRGB, compressedBlockRGBA, uncompressedBlockAlpha, DE_TRUE); 881 882 // Write to dst. 883 for (int y = 0; y < (int)ETC2_BLOCK_HEIGHT; y++) 884 { 885 for (int x = 0; x < (int)ETC2_BLOCK_WIDTH; x++) 886 { 887 const deUint8* const srcPixel = &uncompressedBlockRGB[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8]; 888 const deUint8* const srcPixelAlpha = &uncompressedBlockAlpha[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8]; 889 deUint8* const dstPixel = dstPtr + y*dstRowPitch + x*dstPixelSize; 890 891 DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8 == 4); 892 dstPixel[0] = srcPixel[0]; 893 dstPixel[1] = srcPixel[1]; 894 dstPixel[2] = srcPixel[2]; 895 dstPixel[3] = srcPixelAlpha[0]; 896 } 897 } 898 } 899 900 void decompressEAC_R11 (const PixelBufferAccess& dst, const deUint8* src, bool signedMode) 901 { 902 using namespace EtcDecompressInternal; 903 904 deUint8* const dstPtr = (deUint8*)dst.getDataPtr(); 905 const int dstRowPitch = dst.getRowPitch(); 906 const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_R11; 907 908 const deUint64 compressedBlock = get64BitBlock(src, 0); 909 deUint8 uncompressedBlock[ETC2_UNCOMPRESSED_BLOCK_SIZE_R11]; 910 911 // Decompress. 912 decompressEAC11Block(uncompressedBlock, compressedBlock, signedMode); 913 914 // Write to dst. 915 for (int y = 0; y < (int)ETC2_BLOCK_HEIGHT; y++) 916 { 917 for (int x = 0; x < (int)ETC2_BLOCK_WIDTH; x++) 918 { 919 DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_R11 == 2); 920 921 if (signedMode) 922 { 923 const deInt16* const srcPixel = (deInt16*)&uncompressedBlock[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11]; 924 deInt16* const dstPixel = (deInt16*)(dstPtr + y*dstRowPitch + x*dstPixelSize); 925 926 dstPixel[0] = extend11To16WithSign(srcPixel[0]); 927 } 928 else 929 { 930 const deUint16* const srcPixel = (deUint16*)&uncompressedBlock[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11]; 931 deUint16* const dstPixel = (deUint16*)(dstPtr + y*dstRowPitch + x*dstPixelSize); 932 933 dstPixel[0] = extend11To16(srcPixel[0]); 934 } 935 } 936 } 937 } 938 939 void decompressEAC_RG11 (const PixelBufferAccess& dst, const deUint8* src, bool signedMode) 940 { 941 using namespace EtcDecompressInternal; 942 943 deUint8* const dstPtr = (deUint8*)dst.getDataPtr(); 944 const int dstRowPitch = dst.getRowPitch(); 945 const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_RG11; 946 947 const deUint64 compressedBlockR = get128BitBlockStart(src, 0); 948 const deUint64 compressedBlockG = get128BitBlockEnd(src, 0); 949 deUint8 uncompressedBlockR[ETC2_UNCOMPRESSED_BLOCK_SIZE_R11]; 950 deUint8 uncompressedBlockG[ETC2_UNCOMPRESSED_BLOCK_SIZE_R11]; 951 952 // Decompress. 953 decompressEAC11Block(uncompressedBlockR, compressedBlockR, signedMode); 954 decompressEAC11Block(uncompressedBlockG, compressedBlockG, signedMode); 955 956 // Write to dst. 957 for (int y = 0; y < (int)ETC2_BLOCK_HEIGHT; y++) 958 { 959 for (int x = 0; x < (int)ETC2_BLOCK_WIDTH; x++) 960 { 961 DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_RG11 == 4); 962 963 if (signedMode) 964 { 965 const deInt16* const srcPixelR = (deInt16*)&uncompressedBlockR[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11]; 966 const deInt16* const srcPixelG = (deInt16*)&uncompressedBlockG[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11]; 967 deInt16* const dstPixel = (deInt16*)(dstPtr + y*dstRowPitch + x*dstPixelSize); 968 969 dstPixel[0] = extend11To16WithSign(srcPixelR[0]); 970 dstPixel[1] = extend11To16WithSign(srcPixelG[0]); 971 } 972 else 973 { 974 const deUint16* const srcPixelR = (deUint16*)&uncompressedBlockR[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11]; 975 const deUint16* const srcPixelG = (deUint16*)&uncompressedBlockG[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11]; 976 deUint16* const dstPixel = (deUint16*)(dstPtr + y*dstRowPitch + x*dstPixelSize); 977 978 dstPixel[0] = extend11To16(srcPixelR[0]); 979 dstPixel[1] = extend11To16(srcPixelG[0]); 980 } 981 } 982 } 983 } 984 985 void decompressBlock (CompressedTexFormat format, const PixelBufferAccess& dst, const deUint8* src, const TexDecompressionParams& params) 986 { 987 // No 3D blocks supported right now 988 DE_ASSERT(dst.getDepth() == 1); 989 990 switch (format) 991 { 992 case COMPRESSEDTEXFORMAT_ETC1_RGB8: decompressETC1 (dst, src); break; 993 case COMPRESSEDTEXFORMAT_EAC_R11: decompressEAC_R11 (dst, src, false); break; 994 case COMPRESSEDTEXFORMAT_EAC_SIGNED_R11: decompressEAC_R11 (dst, src, true); break; 995 case COMPRESSEDTEXFORMAT_EAC_RG11: decompressEAC_RG11 (dst, src, false); break; 996 case COMPRESSEDTEXFORMAT_EAC_SIGNED_RG11: decompressEAC_RG11 (dst, src, true); break; 997 case COMPRESSEDTEXFORMAT_ETC2_RGB8: decompressETC2 (dst, src); break; 998 case COMPRESSEDTEXFORMAT_ETC2_SRGB8: decompressETC2 (dst, src); break; 999 case COMPRESSEDTEXFORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1: decompressETC2_RGB8_PUNCHTHROUGH_ALPHA1 (dst, src); break; 1000 case COMPRESSEDTEXFORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: decompressETC2_RGB8_PUNCHTHROUGH_ALPHA1 (dst, src); break; 1001 case COMPRESSEDTEXFORMAT_ETC2_EAC_RGBA8: decompressETC2_EAC_RGBA8 (dst, src); break; 1002 case COMPRESSEDTEXFORMAT_ETC2_EAC_SRGB8_ALPHA8: decompressETC2_EAC_RGBA8 (dst, src); break; 1003 1004 case COMPRESSEDTEXFORMAT_ASTC_4x4_RGBA: 1005 case COMPRESSEDTEXFORMAT_ASTC_5x4_RGBA: 1006 case COMPRESSEDTEXFORMAT_ASTC_5x5_RGBA: 1007 case COMPRESSEDTEXFORMAT_ASTC_6x5_RGBA: 1008 case COMPRESSEDTEXFORMAT_ASTC_6x6_RGBA: 1009 case COMPRESSEDTEXFORMAT_ASTC_8x5_RGBA: 1010 case COMPRESSEDTEXFORMAT_ASTC_8x6_RGBA: 1011 case COMPRESSEDTEXFORMAT_ASTC_8x8_RGBA: 1012 case COMPRESSEDTEXFORMAT_ASTC_10x5_RGBA: 1013 case COMPRESSEDTEXFORMAT_ASTC_10x6_RGBA: 1014 case COMPRESSEDTEXFORMAT_ASTC_10x8_RGBA: 1015 case COMPRESSEDTEXFORMAT_ASTC_10x10_RGBA: 1016 case COMPRESSEDTEXFORMAT_ASTC_12x10_RGBA: 1017 case COMPRESSEDTEXFORMAT_ASTC_12x12_RGBA: 1018 case COMPRESSEDTEXFORMAT_ASTC_4x4_SRGB8_ALPHA8: 1019 case COMPRESSEDTEXFORMAT_ASTC_5x4_SRGB8_ALPHA8: 1020 case COMPRESSEDTEXFORMAT_ASTC_5x5_SRGB8_ALPHA8: 1021 case COMPRESSEDTEXFORMAT_ASTC_6x5_SRGB8_ALPHA8: 1022 case COMPRESSEDTEXFORMAT_ASTC_6x6_SRGB8_ALPHA8: 1023 case COMPRESSEDTEXFORMAT_ASTC_8x5_SRGB8_ALPHA8: 1024 case COMPRESSEDTEXFORMAT_ASTC_8x6_SRGB8_ALPHA8: 1025 case COMPRESSEDTEXFORMAT_ASTC_8x8_SRGB8_ALPHA8: 1026 case COMPRESSEDTEXFORMAT_ASTC_10x5_SRGB8_ALPHA8: 1027 case COMPRESSEDTEXFORMAT_ASTC_10x6_SRGB8_ALPHA8: 1028 case COMPRESSEDTEXFORMAT_ASTC_10x8_SRGB8_ALPHA8: 1029 case COMPRESSEDTEXFORMAT_ASTC_10x10_SRGB8_ALPHA8: 1030 case COMPRESSEDTEXFORMAT_ASTC_12x10_SRGB8_ALPHA8: 1031 case COMPRESSEDTEXFORMAT_ASTC_12x12_SRGB8_ALPHA8: 1032 astc::decompress(dst, src, format, params.astcMode); 1033 break; 1034 1035 default: 1036 DE_ASSERT(false); 1037 break; 1038 } 1039 } 1040 1041 int componentSum (const IVec3& vec) 1042 { 1043 return vec.x() + vec.y() + vec.z(); 1044 } 1045 1046 } // anonymous 1047 1048 void decompress (const PixelBufferAccess& dst, CompressedTexFormat fmt, const deUint8* src, const TexDecompressionParams& params) 1049 { 1050 const int blockSize = getBlockSize(fmt); 1051 const IVec3 blockPixelSize (getBlockPixelSize(fmt)); 1052 const IVec3 blockCount (deDivRoundUp32(dst.getWidth(), blockPixelSize.x()), 1053 deDivRoundUp32(dst.getHeight(), blockPixelSize.y()), 1054 deDivRoundUp32(dst.getDepth(), blockPixelSize.z())); 1055 const IVec3 blockPitches (blockSize, blockSize * blockCount.x(), blockSize * blockCount.x() * blockCount.y()); 1056 1057 std::vector<deUint8> uncompressedBlock (dst.getFormat().getPixelSize() * blockPixelSize.x() * blockPixelSize.y() * blockPixelSize.z()); 1058 const PixelBufferAccess blockAccess (getUncompressedFormat(fmt), blockPixelSize.x(), blockPixelSize.y(), blockPixelSize.z(), &uncompressedBlock[0]); 1059 1060 DE_ASSERT(dst.getFormat() == getUncompressedFormat(fmt)); 1061 1062 for (int blockZ = 0; blockZ < blockCount.z(); blockZ++) 1063 for (int blockY = 0; blockY < blockCount.y(); blockY++) 1064 for (int blockX = 0; blockX < blockCount.x(); blockX++) 1065 { 1066 const IVec3 blockPos (blockX, blockY, blockZ); 1067 const deUint8* const blockPtr = src + componentSum(blockPos * blockPitches); 1068 const IVec3 copySize (de::min(blockPixelSize.x(), dst.getWidth() - blockPos.x() * blockPixelSize.x()), 1069 de::min(blockPixelSize.y(), dst.getHeight() - blockPos.y() * blockPixelSize.y()), 1070 de::min(blockPixelSize.z(), dst.getDepth() - blockPos.z() * blockPixelSize.z())); 1071 const IVec3 dstPixelPos = blockPos * blockPixelSize; 1072 1073 decompressBlock(fmt, blockAccess, blockPtr, params); 1074 1075 copy(getSubregion(dst, dstPixelPos.x(), dstPixelPos.y(), dstPixelPos.z(), copySize.x(), copySize.y(), copySize.z()), getSubregion(blockAccess, 0, 0, 0, copySize.x(), copySize.y(), copySize.z())); 1076 } 1077 } 1078 1079 CompressedTexture::CompressedTexture (void) 1080 : m_format (COMPRESSEDTEXFORMAT_LAST) 1081 , m_width (0) 1082 , m_height (0) 1083 , m_depth (0) 1084 { 1085 } 1086 1087 CompressedTexture::CompressedTexture (CompressedTexFormat format, int width, int height, int depth) 1088 : m_format (COMPRESSEDTEXFORMAT_LAST) 1089 , m_width (0) 1090 , m_height (0) 1091 , m_depth (0) 1092 { 1093 setStorage(format, width, height, depth); 1094 } 1095 1096 CompressedTexture::~CompressedTexture (void) 1097 { 1098 } 1099 1100 void CompressedTexture::setStorage (CompressedTexFormat format, int width, int height, int depth) 1101 { 1102 m_format = format; 1103 m_width = width; 1104 m_height = height; 1105 m_depth = depth; 1106 1107 if (m_format != COMPRESSEDTEXFORMAT_LAST) 1108 { 1109 const IVec3 blockPixelSize = getBlockPixelSize(m_format); 1110 const int blockSize = getBlockSize(m_format); 1111 1112 m_data.resize(deDivRoundUp32(m_width, blockPixelSize.x()) * deDivRoundUp32(m_height, blockPixelSize.y()) * deDivRoundUp32(m_depth, blockPixelSize.z()) * blockSize); 1113 } 1114 else 1115 { 1116 DE_ASSERT(m_format == COMPRESSEDTEXFORMAT_LAST); 1117 DE_ASSERT(m_width == 0 && m_height == 0 && m_depth == 0); 1118 m_data.resize(0); 1119 } 1120 } 1121 1122 /*--------------------------------------------------------------------*//*! 1123 * \brief Decode to uncompressed pixel data 1124 * \param dst Destination buffer 1125 *//*--------------------------------------------------------------------*/ 1126 void CompressedTexture::decompress (const PixelBufferAccess& dst, const TexDecompressionParams& params) const 1127 { 1128 DE_ASSERT(dst.getWidth() == m_width && dst.getHeight() == m_height && dst.getDepth() == m_depth); 1129 DE_ASSERT(dst.getFormat() == getUncompressedFormat(m_format)); 1130 1131 tcu::decompress(dst, m_format, &m_data[0], params); 1132 } 1133 1134 } // tcu 1135
