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 "deStringUtil.hpp" 27 #include "deFloat16.h" 28 29 #include <algorithm> 30 31 namespace tcu 32 { 33 34 enum { ASTC_BLOCK_SIZE_BYTES = 128/8 }; 35 36 template <typename T, typename Y> 37 struct isSameType { enum { V = 0 }; }; 38 template <typename T> 39 struct isSameType<T, T> { enum { V = 1 }; }; 40 41 CompressedTexture::CompressedTexture (void) 42 : m_format (FORMAT_LAST) 43 , m_width (0) 44 , m_height (0) 45 , m_depth (0) 46 { 47 } 48 49 CompressedTexture::CompressedTexture (Format format, int width, int height, int depth) 50 : m_format (FORMAT_LAST) 51 , m_width (0) 52 , m_height (0) 53 , m_depth (0) 54 { 55 setStorage(format, width, height, depth); 56 } 57 58 CompressedTexture::~CompressedTexture (void) 59 { 60 } 61 62 static inline int divRoundUp (int a, int b) 63 { 64 return a/b + ((a%b) ? 1 : 0); 65 } 66 67 bool isEtcFormat (CompressedTexture::Format fmt) 68 { 69 switch (fmt) 70 { 71 case CompressedTexture::ETC1_RGB8: 72 case CompressedTexture::EAC_R11: 73 case CompressedTexture::EAC_SIGNED_R11: 74 case CompressedTexture::EAC_RG11: 75 case CompressedTexture::EAC_SIGNED_RG11: 76 case CompressedTexture::ETC2_RGB8: 77 case CompressedTexture::ETC2_SRGB8: 78 case CompressedTexture::ETC2_RGB8_PUNCHTHROUGH_ALPHA1: 79 case CompressedTexture::ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: 80 case CompressedTexture::ETC2_EAC_RGBA8: 81 case CompressedTexture::ETC2_EAC_SRGB8_ALPHA8: 82 return true; 83 84 default: 85 return false; 86 } 87 } 88 89 bool isASTCFormat (CompressedTexture::Format fmt) 90 { 91 switch (fmt) 92 { 93 case CompressedTexture::ASTC_4x4_RGBA: 94 case CompressedTexture::ASTC_5x4_RGBA: 95 case CompressedTexture::ASTC_5x5_RGBA: 96 case CompressedTexture::ASTC_6x5_RGBA: 97 case CompressedTexture::ASTC_6x6_RGBA: 98 case CompressedTexture::ASTC_8x5_RGBA: 99 case CompressedTexture::ASTC_8x6_RGBA: 100 case CompressedTexture::ASTC_8x8_RGBA: 101 case CompressedTexture::ASTC_10x5_RGBA: 102 case CompressedTexture::ASTC_10x6_RGBA: 103 case CompressedTexture::ASTC_10x8_RGBA: 104 case CompressedTexture::ASTC_10x10_RGBA: 105 case CompressedTexture::ASTC_12x10_RGBA: 106 case CompressedTexture::ASTC_12x12_RGBA: 107 case CompressedTexture::ASTC_4x4_SRGB8_ALPHA8: 108 case CompressedTexture::ASTC_5x4_SRGB8_ALPHA8: 109 case CompressedTexture::ASTC_5x5_SRGB8_ALPHA8: 110 case CompressedTexture::ASTC_6x5_SRGB8_ALPHA8: 111 case CompressedTexture::ASTC_6x6_SRGB8_ALPHA8: 112 case CompressedTexture::ASTC_8x5_SRGB8_ALPHA8: 113 case CompressedTexture::ASTC_8x6_SRGB8_ALPHA8: 114 case CompressedTexture::ASTC_8x8_SRGB8_ALPHA8: 115 case CompressedTexture::ASTC_10x5_SRGB8_ALPHA8: 116 case CompressedTexture::ASTC_10x6_SRGB8_ALPHA8: 117 case CompressedTexture::ASTC_10x8_SRGB8_ALPHA8: 118 case CompressedTexture::ASTC_10x10_SRGB8_ALPHA8: 119 case CompressedTexture::ASTC_12x10_SRGB8_ALPHA8: 120 case CompressedTexture::ASTC_12x12_SRGB8_ALPHA8: 121 return true; 122 123 default: 124 return false; 125 } 126 } 127 128 bool isASTCSRGBFormat (CompressedTexture::Format fmt) 129 { 130 switch (fmt) 131 { 132 case CompressedTexture::ASTC_4x4_SRGB8_ALPHA8: 133 case CompressedTexture::ASTC_5x4_SRGB8_ALPHA8: 134 case CompressedTexture::ASTC_5x5_SRGB8_ALPHA8: 135 case CompressedTexture::ASTC_6x5_SRGB8_ALPHA8: 136 case CompressedTexture::ASTC_6x6_SRGB8_ALPHA8: 137 case CompressedTexture::ASTC_8x5_SRGB8_ALPHA8: 138 case CompressedTexture::ASTC_8x6_SRGB8_ALPHA8: 139 case CompressedTexture::ASTC_8x8_SRGB8_ALPHA8: 140 case CompressedTexture::ASTC_10x5_SRGB8_ALPHA8: 141 case CompressedTexture::ASTC_10x6_SRGB8_ALPHA8: 142 case CompressedTexture::ASTC_10x8_SRGB8_ALPHA8: 143 case CompressedTexture::ASTC_10x10_SRGB8_ALPHA8: 144 case CompressedTexture::ASTC_12x10_SRGB8_ALPHA8: 145 case CompressedTexture::ASTC_12x12_SRGB8_ALPHA8: 146 return true; 147 148 default: 149 return false; 150 } 151 } 152 153 IVec3 getASTCBlockSize (CompressedTexture::Format fmt) 154 { 155 switch (fmt) 156 { 157 case CompressedTexture::ASTC_4x4_RGBA: return IVec3(4, 4, 1); 158 case CompressedTexture::ASTC_5x4_RGBA: return IVec3(5, 4, 1); 159 case CompressedTexture::ASTC_5x5_RGBA: return IVec3(5, 5, 1); 160 case CompressedTexture::ASTC_6x5_RGBA: return IVec3(6, 5, 1); 161 case CompressedTexture::ASTC_6x6_RGBA: return IVec3(6, 6, 1); 162 case CompressedTexture::ASTC_8x5_RGBA: return IVec3(8, 5, 1); 163 case CompressedTexture::ASTC_8x6_RGBA: return IVec3(8, 6, 1); 164 case CompressedTexture::ASTC_8x8_RGBA: return IVec3(8, 8, 1); 165 case CompressedTexture::ASTC_10x5_RGBA: return IVec3(10, 5, 1); 166 case CompressedTexture::ASTC_10x6_RGBA: return IVec3(10, 6, 1); 167 case CompressedTexture::ASTC_10x8_RGBA: return IVec3(10, 8, 1); 168 case CompressedTexture::ASTC_10x10_RGBA: return IVec3(10, 10, 1); 169 case CompressedTexture::ASTC_12x10_RGBA: return IVec3(12, 10, 1); 170 case CompressedTexture::ASTC_12x12_RGBA: return IVec3(12, 12, 1); 171 case CompressedTexture::ASTC_4x4_SRGB8_ALPHA8: return IVec3(4, 4, 1); 172 case CompressedTexture::ASTC_5x4_SRGB8_ALPHA8: return IVec3(5, 4, 1); 173 case CompressedTexture::ASTC_5x5_SRGB8_ALPHA8: return IVec3(5, 5, 1); 174 case CompressedTexture::ASTC_6x5_SRGB8_ALPHA8: return IVec3(6, 5, 1); 175 case CompressedTexture::ASTC_6x6_SRGB8_ALPHA8: return IVec3(6, 6, 1); 176 case CompressedTexture::ASTC_8x5_SRGB8_ALPHA8: return IVec3(8, 5, 1); 177 case CompressedTexture::ASTC_8x6_SRGB8_ALPHA8: return IVec3(8, 6, 1); 178 case CompressedTexture::ASTC_8x8_SRGB8_ALPHA8: return IVec3(8, 8, 1); 179 case CompressedTexture::ASTC_10x5_SRGB8_ALPHA8: return IVec3(10, 5, 1); 180 case CompressedTexture::ASTC_10x6_SRGB8_ALPHA8: return IVec3(10, 6, 1); 181 case CompressedTexture::ASTC_10x8_SRGB8_ALPHA8: return IVec3(10, 8, 1); 182 case CompressedTexture::ASTC_10x10_SRGB8_ALPHA8: return IVec3(10, 10, 1); 183 case CompressedTexture::ASTC_12x10_SRGB8_ALPHA8: return IVec3(12, 10, 1); 184 case CompressedTexture::ASTC_12x12_SRGB8_ALPHA8: return IVec3(12, 12, 1); 185 186 default: 187 DE_ASSERT(false); 188 return IVec3(); 189 } 190 } 191 192 CompressedTexture::Format getASTCFormatByBlockSize (int width, int height, int depth, bool isSRGB) 193 { 194 if (depth > 1) 195 throw tcu::InternalError("3D ASTC textures not currently supported"); 196 197 const tcu::IVec3 size(width, height, depth); 198 199 for (int fmtI = 0; fmtI < CompressedTexture::FORMAT_LAST; fmtI++) 200 { 201 const CompressedTexture::Format fmt = (CompressedTexture::Format)fmtI; 202 203 if (isASTCFormat(fmt) && getASTCBlockSize(fmt) == size && isASTCSRGBFormat(fmt) == isSRGB) 204 return fmt; 205 } 206 207 throw tcu::InternalError("Invalid ASTC block size " + de::toString(width) + "x" + de::toString(height) + "x" + de::toString(depth)); 208 } 209 210 void CompressedTexture::setStorage (Format format, int width, int height, int depth) 211 { 212 m_format = format; 213 m_width = width; 214 m_height = height; 215 m_depth = depth; 216 217 if (isEtcFormat(m_format)) 218 { 219 DE_ASSERT(m_depth == 1); 220 221 int blockSizeMultiplier = 0; // How many 64-bit parts each compressed block contains. 222 223 switch (m_format) 224 { 225 case ETC1_RGB8: blockSizeMultiplier = 1; break; 226 case EAC_R11: blockSizeMultiplier = 1; break; 227 case EAC_SIGNED_R11: blockSizeMultiplier = 1; break; 228 case EAC_RG11: blockSizeMultiplier = 2; break; 229 case EAC_SIGNED_RG11: blockSizeMultiplier = 2; break; 230 case ETC2_RGB8: blockSizeMultiplier = 1; break; 231 case ETC2_SRGB8: blockSizeMultiplier = 1; break; 232 case ETC2_RGB8_PUNCHTHROUGH_ALPHA1: blockSizeMultiplier = 1; break; 233 case ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: blockSizeMultiplier = 1; break; 234 case ETC2_EAC_RGBA8: blockSizeMultiplier = 2; break; 235 case ETC2_EAC_SRGB8_ALPHA8: blockSizeMultiplier = 2; break; 236 237 default: 238 DE_ASSERT(false); 239 break; 240 } 241 242 m_data.resize(blockSizeMultiplier * sizeof(deUint64) * divRoundUp(m_width, 4) * divRoundUp(m_height, 4)); 243 } 244 else if (isASTCFormat(m_format)) 245 { 246 if (m_depth > 1) 247 throw tcu::InternalError("3D ASTC textures not currently supported"); 248 249 const IVec3 blockSize = getASTCBlockSize(m_format); 250 m_data.resize(ASTC_BLOCK_SIZE_BYTES * divRoundUp(m_width, blockSize.x()) * divRoundUp(m_height, blockSize.y()) * divRoundUp(m_depth, blockSize.z())); 251 } 252 else 253 { 254 DE_ASSERT(m_format == FORMAT_LAST); 255 DE_ASSERT(m_width == 0 && m_height == 0 && m_depth == 0); 256 m_data.resize(0); 257 } 258 } 259 260 /*--------------------------------------------------------------------*//*! 261 * \brief Get uncompressed texture format 262 *//*--------------------------------------------------------------------*/ 263 TextureFormat CompressedTexture::getUncompressedFormat (void) const 264 { 265 if (isEtcFormat(m_format)) 266 { 267 switch (m_format) 268 { 269 case ETC1_RGB8: return TextureFormat(TextureFormat::RGB, TextureFormat::UNORM_INT8); 270 case EAC_R11: return TextureFormat(TextureFormat::R, TextureFormat::UNORM_INT16); 271 case EAC_SIGNED_R11: return TextureFormat(TextureFormat::R, TextureFormat::SNORM_INT16); 272 case EAC_RG11: return TextureFormat(TextureFormat::RG, TextureFormat::UNORM_INT16); 273 case EAC_SIGNED_RG11: return TextureFormat(TextureFormat::RG, TextureFormat::SNORM_INT16); 274 case ETC2_RGB8: return TextureFormat(TextureFormat::RGB, TextureFormat::UNORM_INT8); 275 case ETC2_SRGB8: return TextureFormat(TextureFormat::sRGB, TextureFormat::UNORM_INT8); 276 case ETC2_RGB8_PUNCHTHROUGH_ALPHA1: return TextureFormat(TextureFormat::RGBA, TextureFormat::UNORM_INT8); 277 case ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: return TextureFormat(TextureFormat::sRGBA, TextureFormat::UNORM_INT8); 278 case ETC2_EAC_RGBA8: return TextureFormat(TextureFormat::RGBA, TextureFormat::UNORM_INT8); 279 case ETC2_EAC_SRGB8_ALPHA8: return TextureFormat(TextureFormat::sRGBA, TextureFormat::UNORM_INT8); 280 default: 281 DE_ASSERT(false); 282 return TextureFormat(); 283 } 284 } 285 else if (isASTCFormat(m_format)) 286 { 287 if (isASTCSRGBFormat(m_format)) 288 return TextureFormat(TextureFormat::sRGBA, TextureFormat::UNORM_INT8); 289 else 290 return TextureFormat(TextureFormat::RGBA, TextureFormat::HALF_FLOAT); 291 } 292 else 293 { 294 DE_ASSERT(false); 295 return TextureFormat(); 296 } 297 } 298 299 // \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? 300 301 namespace EtcDecompressInternal 302 { 303 304 enum 305 { 306 ETC2_BLOCK_WIDTH = 4, 307 ETC2_BLOCK_HEIGHT = 4, 308 ETC2_UNCOMPRESSED_PIXEL_SIZE_A8 = 1, 309 ETC2_UNCOMPRESSED_PIXEL_SIZE_R11 = 2, 310 ETC2_UNCOMPRESSED_PIXEL_SIZE_RG11 = 4, 311 ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8 = 3, 312 ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8 = 4, 313 ETC2_UNCOMPRESSED_BLOCK_SIZE_A8 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8, 314 ETC2_UNCOMPRESSED_BLOCK_SIZE_R11 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11, 315 ETC2_UNCOMPRESSED_BLOCK_SIZE_RG11 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_RG11, 316 ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8, 317 ETC2_UNCOMPRESSED_BLOCK_SIZE_RGBA8 = ETC2_BLOCK_WIDTH*ETC2_BLOCK_HEIGHT*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8 318 }; 319 320 static inline deUint64 get64BitBlock (const deUint8* src, int blockNdx) 321 { 322 // Stored in big-endian form. 323 deUint64 block = 0; 324 for (int i = 0; i < 8; i++) 325 block = (block << 8ull) | (deUint64)(src[blockNdx*8+i]); 326 return block; 327 } 328 329 // Return the first 64 bits of a 128 bit block. 330 static inline deUint64 get128BitBlockStart (const deUint8* src, int blockNdx) 331 { 332 return get64BitBlock(src, 2*blockNdx); 333 } 334 335 // Return the last 64 bits of a 128 bit block. 336 static inline deUint64 get128BitBlockEnd (const deUint8* src, int blockNdx) 337 { 338 return get64BitBlock(src, 2*blockNdx + 1); 339 } 340 341 static inline deUint32 getBit (deUint64 src, int bit) 342 { 343 return (src >> bit) & 1; 344 } 345 346 static inline deUint32 getBits (deUint64 src, int low, int high) 347 { 348 const int numBits = (high-low) + 1; 349 DE_ASSERT(de::inRange(numBits, 1, 32)); 350 return (src >> low) & ((1<<numBits)-1); 351 } 352 353 static inline deUint8 extend4To8 (deUint8 src) 354 { 355 DE_ASSERT((src & ~((1<<4)-1)) == 0); 356 return (src << 4) | src; 357 } 358 359 static inline deUint8 extend5To8 (deUint8 src) 360 { 361 DE_ASSERT((src & ~((1<<5)-1)) == 0); 362 return (src << 3) | (src >> 2); 363 } 364 365 static inline deUint8 extend6To8 (deUint8 src) 366 { 367 DE_ASSERT((src & ~((1<<6)-1)) == 0); 368 return (src << 2) | (src >> 4); 369 } 370 371 static inline deUint8 extend7To8 (deUint8 src) 372 { 373 DE_ASSERT((src & ~((1<<7)-1)) == 0); 374 return (src << 1) | (src >> 6); 375 } 376 377 static inline deInt8 extendSigned3To8 (deUint8 src) 378 { 379 const bool isNeg = (src & (1<<2)) != 0; 380 return (deInt8)((isNeg ? ~((1<<3)-1) : 0) | src); 381 } 382 383 static inline deUint8 extend5Delta3To8 (deUint8 base5, deUint8 delta3) 384 { 385 const deUint8 t = (deUint8)((deInt8)base5 + extendSigned3To8(delta3)); 386 return extend5To8(t); 387 } 388 389 static inline deUint16 extend11To16 (deUint16 src) 390 { 391 DE_ASSERT((src & ~((1<<11)-1)) == 0); 392 return (src << 5) | (src >> 6); 393 } 394 395 static inline deInt16 extend11To16WithSign (deInt16 src) 396 { 397 if (src < 0) 398 return -(deInt16)extend11To16(-src); 399 else 400 return (deInt16)extend11To16(src); 401 } 402 403 static void decompressETC1Block (deUint8 dst[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8], deUint64 src) 404 { 405 const int diffBit = (int)getBit(src, 33); 406 const int flipBit = (int)getBit(src, 32); 407 const deUint32 table[2] = { getBits(src, 37, 39), getBits(src, 34, 36) }; 408 deUint8 baseR[2]; 409 deUint8 baseG[2]; 410 deUint8 baseB[2]; 411 412 if (diffBit == 0) 413 { 414 // Individual mode. 415 baseR[0] = extend4To8((deUint8)getBits(src, 60, 63)); 416 baseR[1] = extend4To8((deUint8)getBits(src, 56, 59)); 417 baseG[0] = extend4To8((deUint8)getBits(src, 52, 55)); 418 baseG[1] = extend4To8((deUint8)getBits(src, 48, 51)); 419 baseB[0] = extend4To8((deUint8)getBits(src, 44, 47)); 420 baseB[1] = extend4To8((deUint8)getBits(src, 40, 43)); 421 } 422 else 423 { 424 // Differential mode (diffBit == 1). 425 deUint8 bR = (deUint8)getBits(src, 59, 63); // 5b 426 deUint8 dR = (deUint8)getBits(src, 56, 58); // 3b 427 deUint8 bG = (deUint8)getBits(src, 51, 55); 428 deUint8 dG = (deUint8)getBits(src, 48, 50); 429 deUint8 bB = (deUint8)getBits(src, 43, 47); 430 deUint8 dB = (deUint8)getBits(src, 40, 42); 431 432 baseR[0] = extend5To8(bR); 433 baseG[0] = extend5To8(bG); 434 baseB[0] = extend5To8(bB); 435 436 baseR[1] = extend5Delta3To8(bR, dR); 437 baseG[1] = extend5Delta3To8(bG, dG); 438 baseB[1] = extend5Delta3To8(bB, dB); 439 } 440 441 static const int modifierTable[8][4] = 442 { 443 // 00 01 10 11 444 { 2, 8, -2, -8 }, 445 { 5, 17, -5, -17 }, 446 { 9, 29, -9, -29 }, 447 { 13, 42, -13, -42 }, 448 { 18, 60, -18, -60 }, 449 { 24, 80, -24, -80 }, 450 { 33, 106, -33, -106 }, 451 { 47, 183, -47, -183 } 452 }; 453 454 // Write final pixels. 455 for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++) 456 { 457 const int x = pixelNdx / ETC2_BLOCK_HEIGHT; 458 const int y = pixelNdx % ETC2_BLOCK_HEIGHT; 459 const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8; 460 const int subBlock = ((flipBit ? y : x) >= 2) ? 1 : 0; 461 const deUint32 tableNdx = table[subBlock]; 462 const deUint32 modifierNdx = (getBit(src, 16+pixelNdx) << 1) | getBit(src, pixelNdx); 463 const int modifier = modifierTable[tableNdx][modifierNdx]; 464 465 dst[dstOffset+0] = (deUint8)deClamp32((int)baseR[subBlock] + modifier, 0, 255); 466 dst[dstOffset+1] = (deUint8)deClamp32((int)baseG[subBlock] + modifier, 0, 255); 467 dst[dstOffset+2] = (deUint8)deClamp32((int)baseB[subBlock] + modifier, 0, 255); 468 } 469 } 470 471 // if alphaMode is true, do PUNCHTHROUGH and store alpha to alphaDst; otherwise do ordinary ETC2 RGB8. 472 static void decompressETC2Block (deUint8 dst[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8], deUint64 src, deUint8 alphaDst[ETC2_UNCOMPRESSED_BLOCK_SIZE_A8], bool alphaMode) 473 { 474 enum Etc2Mode 475 { 476 MODE_INDIVIDUAL = 0, 477 MODE_DIFFERENTIAL, 478 MODE_T, 479 MODE_H, 480 MODE_PLANAR, 481 482 MODE_LAST 483 }; 484 485 const int diffOpaqueBit = (int)getBit(src, 33); 486 const deInt8 selBR = (deInt8)getBits(src, 59, 63); // 5 bits. 487 const deInt8 selBG = (deInt8)getBits(src, 51, 55); 488 const deInt8 selBB = (deInt8)getBits(src, 43, 47); 489 const deInt8 selDR = extendSigned3To8((deUint8)getBits(src, 56, 58)); // 3 bits. 490 const deInt8 selDG = extendSigned3To8((deUint8)getBits(src, 48, 50)); 491 const deInt8 selDB = extendSigned3To8((deUint8)getBits(src, 40, 42)); 492 Etc2Mode mode; 493 494 if (!alphaMode && diffOpaqueBit == 0) 495 mode = MODE_INDIVIDUAL; 496 else if (!de::inRange(selBR + selDR, 0, 31)) 497 mode = MODE_T; 498 else if (!de::inRange(selBG + selDG, 0, 31)) 499 mode = MODE_H; 500 else if (!de::inRange(selBB + selDB, 0, 31)) 501 mode = MODE_PLANAR; 502 else 503 mode = MODE_DIFFERENTIAL; 504 505 if (mode == MODE_INDIVIDUAL || mode == MODE_DIFFERENTIAL) 506 { 507 // Individual and differential modes have some steps in common, handle them here. 508 static const int modifierTable[8][4] = 509 { 510 // 00 01 10 11 511 { 2, 8, -2, -8 }, 512 { 5, 17, -5, -17 }, 513 { 9, 29, -9, -29 }, 514 { 13, 42, -13, -42 }, 515 { 18, 60, -18, -60 }, 516 { 24, 80, -24, -80 }, 517 { 33, 106, -33, -106 }, 518 { 47, 183, -47, -183 } 519 }; 520 521 const int flipBit = (int)getBit(src, 32); 522 const deUint32 table[2] = { getBits(src, 37, 39), getBits(src, 34, 36) }; 523 deUint8 baseR[2]; 524 deUint8 baseG[2]; 525 deUint8 baseB[2]; 526 527 if (mode == MODE_INDIVIDUAL) 528 { 529 // Individual mode, initial values. 530 baseR[0] = extend4To8((deUint8)getBits(src, 60, 63)); 531 baseR[1] = extend4To8((deUint8)getBits(src, 56, 59)); 532 baseG[0] = extend4To8((deUint8)getBits(src, 52, 55)); 533 baseG[1] = extend4To8((deUint8)getBits(src, 48, 51)); 534 baseB[0] = extend4To8((deUint8)getBits(src, 44, 47)); 535 baseB[1] = extend4To8((deUint8)getBits(src, 40, 43)); 536 } 537 else 538 { 539 // Differential mode, initial values. 540 baseR[0] = extend5To8(selBR); 541 baseG[0] = extend5To8(selBG); 542 baseB[0] = extend5To8(selBB); 543 544 baseR[1] = extend5To8((deUint8)(selBR + selDR)); 545 baseG[1] = extend5To8((deUint8)(selBG + selDG)); 546 baseB[1] = extend5To8((deUint8)(selBB + selDB)); 547 } 548 549 // Write final pixels for individual or differential mode. 550 for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++) 551 { 552 const int x = pixelNdx / ETC2_BLOCK_HEIGHT; 553 const int y = pixelNdx % ETC2_BLOCK_HEIGHT; 554 const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8; 555 const int subBlock = ((flipBit ? y : x) >= 2) ? 1 : 0; 556 const deUint32 tableNdx = table[subBlock]; 557 const deUint32 modifierNdx = (getBit(src, 16+pixelNdx) << 1) | getBit(src, pixelNdx); 558 const int alphaDstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8; // Only needed for PUNCHTHROUGH version. 559 560 // If doing PUNCHTHROUGH version (alphaMode), opaque bit may affect colors. 561 if (alphaMode && diffOpaqueBit == 0 && modifierNdx == 2) 562 { 563 dst[dstOffset+0] = 0; 564 dst[dstOffset+1] = 0; 565 dst[dstOffset+2] = 0; 566 alphaDst[alphaDstOffset] = 0; 567 } 568 else 569 { 570 int modifier; 571 572 // PUNCHTHROUGH version and opaque bit may also affect modifiers. 573 if (alphaMode && diffOpaqueBit == 0 && (modifierNdx == 0 || modifierNdx == 2)) 574 modifier = 0; 575 else 576 modifier = modifierTable[tableNdx][modifierNdx]; 577 578 dst[dstOffset+0] = (deUint8)deClamp32((int)baseR[subBlock] + modifier, 0, 255); 579 dst[dstOffset+1] = (deUint8)deClamp32((int)baseG[subBlock] + modifier, 0, 255); 580 dst[dstOffset+2] = (deUint8)deClamp32((int)baseB[subBlock] + modifier, 0, 255); 581 582 if (alphaMode) 583 alphaDst[alphaDstOffset] = 255; 584 } 585 } 586 } 587 else if (mode == MODE_T || mode == MODE_H) 588 { 589 // T and H modes have some steps in common, handle them here. 590 static const int distTable[8] = { 3, 6, 11, 16, 23, 32, 41, 64 }; 591 592 deUint8 paintR[4]; 593 deUint8 paintG[4]; 594 deUint8 paintB[4]; 595 596 if (mode == MODE_T) 597 { 598 // T mode, calculate paint values. 599 const deUint8 R1a = (deUint8)getBits(src, 59, 60); 600 const deUint8 R1b = (deUint8)getBits(src, 56, 57); 601 const deUint8 G1 = (deUint8)getBits(src, 52, 55); 602 const deUint8 B1 = (deUint8)getBits(src, 48, 51); 603 const deUint8 R2 = (deUint8)getBits(src, 44, 47); 604 const deUint8 G2 = (deUint8)getBits(src, 40, 43); 605 const deUint8 B2 = (deUint8)getBits(src, 36, 39); 606 const deUint32 distNdx = (getBits(src, 34, 35) << 1) | getBit(src, 32); 607 const int dist = distTable[distNdx]; 608 609 paintR[0] = extend4To8((R1a << 2) | R1b); 610 paintG[0] = extend4To8(G1); 611 paintB[0] = extend4To8(B1); 612 paintR[2] = extend4To8(R2); 613 paintG[2] = extend4To8(G2); 614 paintB[2] = extend4To8(B2); 615 paintR[1] = (deUint8)deClamp32((int)paintR[2] + dist, 0, 255); 616 paintG[1] = (deUint8)deClamp32((int)paintG[2] + dist, 0, 255); 617 paintB[1] = (deUint8)deClamp32((int)paintB[2] + dist, 0, 255); 618 paintR[3] = (deUint8)deClamp32((int)paintR[2] - dist, 0, 255); 619 paintG[3] = (deUint8)deClamp32((int)paintG[2] - dist, 0, 255); 620 paintB[3] = (deUint8)deClamp32((int)paintB[2] - dist, 0, 255); 621 } 622 else 623 { 624 // H mode, calculate paint values. 625 const deUint8 R1 = (deUint8)getBits(src, 59, 62); 626 const deUint8 G1a = (deUint8)getBits(src, 56, 58); 627 const deUint8 G1b = (deUint8)getBit(src, 52); 628 const deUint8 B1a = (deUint8)getBit(src, 51); 629 const deUint8 B1b = (deUint8)getBits(src, 47, 49); 630 const deUint8 R2 = (deUint8)getBits(src, 43, 46); 631 const deUint8 G2 = (deUint8)getBits(src, 39, 42); 632 const deUint8 B2 = (deUint8)getBits(src, 35, 38); 633 deUint8 baseR[2]; 634 deUint8 baseG[2]; 635 deUint8 baseB[2]; 636 deUint32 baseValue[2]; 637 deUint32 distNdx; 638 int dist; 639 640 baseR[0] = extend4To8(R1); 641 baseG[0] = extend4To8((G1a << 1) | G1b); 642 baseB[0] = extend4To8((B1a << 3) | B1b); 643 baseR[1] = extend4To8(R2); 644 baseG[1] = extend4To8(G2); 645 baseB[1] = extend4To8(B2); 646 baseValue[0] = (((deUint32)baseR[0]) << 16) | (((deUint32)baseG[0]) << 8) | baseB[0]; 647 baseValue[1] = (((deUint32)baseR[1]) << 16) | (((deUint32)baseG[1]) << 8) | baseB[1]; 648 distNdx = (getBit(src, 34) << 2) | (getBit(src, 32) << 1) | (deUint32)(baseValue[0] >= baseValue[1]); 649 dist = distTable[distNdx]; 650 651 paintR[0] = (deUint8)deClamp32((int)baseR[0] + dist, 0, 255); 652 paintG[0] = (deUint8)deClamp32((int)baseG[0] + dist, 0, 255); 653 paintB[0] = (deUint8)deClamp32((int)baseB[0] + dist, 0, 255); 654 paintR[1] = (deUint8)deClamp32((int)baseR[0] - dist, 0, 255); 655 paintG[1] = (deUint8)deClamp32((int)baseG[0] - dist, 0, 255); 656 paintB[1] = (deUint8)deClamp32((int)baseB[0] - dist, 0, 255); 657 paintR[2] = (deUint8)deClamp32((int)baseR[1] + dist, 0, 255); 658 paintG[2] = (deUint8)deClamp32((int)baseG[1] + dist, 0, 255); 659 paintB[2] = (deUint8)deClamp32((int)baseB[1] + dist, 0, 255); 660 paintR[3] = (deUint8)deClamp32((int)baseR[1] - dist, 0, 255); 661 paintG[3] = (deUint8)deClamp32((int)baseG[1] - dist, 0, 255); 662 paintB[3] = (deUint8)deClamp32((int)baseB[1] - dist, 0, 255); 663 } 664 665 // Write final pixels for T or H mode. 666 for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++) 667 { 668 const int x = pixelNdx / ETC2_BLOCK_HEIGHT; 669 const int y = pixelNdx % ETC2_BLOCK_HEIGHT; 670 const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8; 671 const deUint32 paintNdx = (getBit(src, 16+pixelNdx) << 1) | getBit(src, pixelNdx); 672 const int alphaDstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8; // Only needed for PUNCHTHROUGH version. 673 674 if (alphaMode && diffOpaqueBit == 0 && paintNdx == 2) 675 { 676 dst[dstOffset+0] = 0; 677 dst[dstOffset+1] = 0; 678 dst[dstOffset+2] = 0; 679 alphaDst[alphaDstOffset] = 0; 680 } 681 else 682 { 683 dst[dstOffset+0] = (deUint8)deClamp32((int)paintR[paintNdx], 0, 255); 684 dst[dstOffset+1] = (deUint8)deClamp32((int)paintG[paintNdx], 0, 255); 685 dst[dstOffset+2] = (deUint8)deClamp32((int)paintB[paintNdx], 0, 255); 686 687 if (alphaMode) 688 alphaDst[alphaDstOffset] = 255; 689 } 690 } 691 } 692 else 693 { 694 // Planar mode. 695 const deUint8 GO1 = (deUint8)getBit(src, 56); 696 const deUint8 GO2 = (deUint8)getBits(src, 49, 54); 697 const deUint8 BO1 = (deUint8)getBit(src, 48); 698 const deUint8 BO2 = (deUint8)getBits(src, 43, 44); 699 const deUint8 BO3 = (deUint8)getBits(src, 39, 41); 700 const deUint8 RH1 = (deUint8)getBits(src, 34, 38); 701 const deUint8 RH2 = (deUint8)getBit(src, 32); 702 const deUint8 RO = extend6To8((deUint8)getBits(src, 57, 62)); 703 const deUint8 GO = extend7To8((GO1 << 6) | GO2); 704 const deUint8 BO = extend6To8((BO1 << 5) | (BO2 << 3) | BO3); 705 const deUint8 RH = extend6To8((RH1 << 1) | RH2); 706 const deUint8 GH = extend7To8((deUint8)getBits(src, 25, 31)); 707 const deUint8 BH = extend6To8((deUint8)getBits(src, 19, 24)); 708 const deUint8 RV = extend6To8((deUint8)getBits(src, 13, 18)); 709 const deUint8 GV = extend7To8((deUint8)getBits(src, 6, 12)); 710 const deUint8 BV = extend6To8((deUint8)getBits(src, 0, 5)); 711 712 // Write final pixels for planar mode. 713 for (int y = 0; y < 4; y++) 714 { 715 for (int x = 0; x < 4; x++) 716 { 717 const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8; 718 const int unclampedR = (x * ((int)RH-(int)RO) + y * ((int)RV-(int)RO) + 4*(int)RO + 2) >> 2; 719 const int unclampedG = (x * ((int)GH-(int)GO) + y * ((int)GV-(int)GO) + 4*(int)GO + 2) >> 2; 720 const int unclampedB = (x * ((int)BH-(int)BO) + y * ((int)BV-(int)BO) + 4*(int)BO + 2) >> 2; 721 const int alphaDstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8; // Only needed for PUNCHTHROUGH version. 722 723 dst[dstOffset+0] = (deUint8)deClamp32(unclampedR, 0, 255); 724 dst[dstOffset+1] = (deUint8)deClamp32(unclampedG, 0, 255); 725 dst[dstOffset+2] = (deUint8)deClamp32(unclampedB, 0, 255); 726 727 if (alphaMode) 728 alphaDst[alphaDstOffset] = 255; 729 } 730 } 731 } 732 } 733 734 static void decompressEAC8Block (deUint8 dst[ETC2_UNCOMPRESSED_BLOCK_SIZE_A8], deUint64 src) 735 { 736 static const int modifierTable[16][8] = 737 { 738 {-3, -6, -9, -15, 2, 5, 8, 14}, 739 {-3, -7, -10, -13, 2, 6, 9, 12}, 740 {-2, -5, -8, -13, 1, 4, 7, 12}, 741 {-2, -4, -6, -13, 1, 3, 5, 12}, 742 {-3, -6, -8, -12, 2, 5, 7, 11}, 743 {-3, -7, -9, -11, 2, 6, 8, 10}, 744 {-4, -7, -8, -11, 3, 6, 7, 10}, 745 {-3, -5, -8, -11, 2, 4, 7, 10}, 746 {-2, -6, -8, -10, 1, 5, 7, 9}, 747 {-2, -5, -8, -10, 1, 4, 7, 9}, 748 {-2, -4, -8, -10, 1, 3, 7, 9}, 749 {-2, -5, -7, -10, 1, 4, 6, 9}, 750 {-3, -4, -7, -10, 2, 3, 6, 9}, 751 {-1, -2, -3, -10, 0, 1, 2, 9}, 752 {-4, -6, -8, -9, 3, 5, 7, 8}, 753 {-3, -5, -7, -9, 2, 4, 6, 8} 754 }; 755 756 const deUint8 baseCodeword = (deUint8)getBits(src, 56, 63); 757 const deUint8 multiplier = (deUint8)getBits(src, 52, 55); 758 const deUint32 tableNdx = getBits(src, 48, 51); 759 760 for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++) 761 { 762 const int x = pixelNdx / ETC2_BLOCK_HEIGHT; 763 const int y = pixelNdx % ETC2_BLOCK_HEIGHT; 764 const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8; 765 const int pixelBitNdx = 45 - 3*pixelNdx; 766 const deUint32 modifierNdx = (getBit(src, pixelBitNdx + 2) << 2) | (getBit(src, pixelBitNdx + 1) << 1) | getBit(src, pixelBitNdx); 767 const int modifier = modifierTable[tableNdx][modifierNdx]; 768 769 dst[dstOffset] = (deUint8)deClamp32((int)baseCodeword + (int)multiplier*modifier, 0, 255); 770 } 771 } 772 773 static void decompressEAC11Block (deUint8 dst[ETC2_UNCOMPRESSED_BLOCK_SIZE_R11], deUint64 src, bool signedMode) 774 { 775 static const int modifierTable[16][8] = 776 { 777 {-3, -6, -9, -15, 2, 5, 8, 14}, 778 {-3, -7, -10, -13, 2, 6, 9, 12}, 779 {-2, -5, -8, -13, 1, 4, 7, 12}, 780 {-2, -4, -6, -13, 1, 3, 5, 12}, 781 {-3, -6, -8, -12, 2, 5, 7, 11}, 782 {-3, -7, -9, -11, 2, 6, 8, 10}, 783 {-4, -7, -8, -11, 3, 6, 7, 10}, 784 {-3, -5, -8, -11, 2, 4, 7, 10}, 785 {-2, -6, -8, -10, 1, 5, 7, 9}, 786 {-2, -5, -8, -10, 1, 4, 7, 9}, 787 {-2, -4, -8, -10, 1, 3, 7, 9}, 788 {-2, -5, -7, -10, 1, 4, 6, 9}, 789 {-3, -4, -7, -10, 2, 3, 6, 9}, 790 {-1, -2, -3, -10, 0, 1, 2, 9}, 791 {-4, -6, -8, -9, 3, 5, 7, 8}, 792 {-3, -5, -7, -9, 2, 4, 6, 8} 793 }; 794 795 const deInt32 multiplier = (deInt32)getBits(src, 52, 55); 796 const deInt32 tableNdx = (deInt32)getBits(src, 48, 51); 797 deInt32 baseCodeword = (deInt32)getBits(src, 56, 63); 798 799 if (signedMode) 800 { 801 if (baseCodeword > 127) 802 baseCodeword -= 256; 803 if (baseCodeword == -128) 804 baseCodeword = -127; 805 } 806 807 for (int pixelNdx = 0; pixelNdx < ETC2_BLOCK_HEIGHT*ETC2_BLOCK_WIDTH; pixelNdx++) 808 { 809 const int x = pixelNdx / ETC2_BLOCK_HEIGHT; 810 const int y = pixelNdx % ETC2_BLOCK_HEIGHT; 811 const int dstOffset = (y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11; 812 const int pixelBitNdx = 45 - 3*pixelNdx; 813 const deUint32 modifierNdx = (getBit(src, pixelBitNdx + 2) << 2) | (getBit(src, pixelBitNdx + 1) << 1) | getBit(src, pixelBitNdx); 814 const int modifier = modifierTable[tableNdx][modifierNdx]; 815 816 if (signedMode) 817 { 818 if (multiplier != 0) 819 *(deInt16*)&dst[dstOffset] = (deInt16)deClamp32(baseCodeword*8 + multiplier*modifier*8, -1023, 1023); 820 else 821 *(deInt16*)&dst[dstOffset] = (deInt16)deClamp32(baseCodeword*8 + modifier, -1023, 1023); 822 } 823 else 824 { 825 if (multiplier != 0) 826 *(deUint16*)&dst[dstOffset] = (deUint16)deClamp32(baseCodeword*8 + 4 + multiplier*modifier*8, 0, 2047); 827 else 828 *(deUint16*)&dst[dstOffset] = (deUint16)deClamp32(baseCodeword*8 + 4 + modifier, 0, 2047); 829 } 830 } 831 } 832 833 } // EtcDecompressInternal 834 835 static void decompressETC1 (const tcu::PixelBufferAccess& dst, int width, int height, const deUint8* src) 836 { 837 using namespace EtcDecompressInternal; 838 839 DE_ASSERT(dst.getWidth() == width && dst.getHeight() == height && dst.getDepth() == 1); 840 DE_ASSERT(dst.getFormat() == TextureFormat(TextureFormat::RGB, TextureFormat::UNORM_INT8)); 841 842 const int numBlocksX = divRoundUp(width, 4); 843 const int numBlocksY = divRoundUp(height, 4); 844 deUint8* const dstPtr = (deUint8*)dst.getDataPtr(); 845 const int dstRowPitch = dst.getRowPitch(); 846 const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8; 847 848 for (int blockY = 0; blockY < numBlocksY; blockY++) 849 { 850 for (int blockX = 0; blockX < numBlocksX; blockX++) 851 { 852 const deUint64 compressedBlock = get64BitBlock(src, blockY*numBlocksX + blockX); 853 deUint8 uncompressedBlock[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8]; 854 855 // Decompress. 856 decompressETC1Block(uncompressedBlock, compressedBlock); 857 858 // Write to dst. 859 const int baseX = blockX*ETC2_BLOCK_WIDTH; 860 const int baseY = blockY*ETC2_BLOCK_HEIGHT; 861 for (int y = 0; y < de::min((int)ETC2_BLOCK_HEIGHT, height-baseY); y++) 862 { 863 for (int x = 0; x < de::min((int)ETC2_BLOCK_WIDTH, width-baseX); x++) 864 { 865 const deUint8* const srcPixel = &uncompressedBlock[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8]; 866 deUint8* const dstPixel = dstPtr + (baseY+y)*dstRowPitch + (baseX+x)*dstPixelSize; 867 868 DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8 == 3); 869 dstPixel[0] = srcPixel[0]; 870 dstPixel[1] = srcPixel[1]; 871 dstPixel[2] = srcPixel[2]; 872 } 873 } 874 } 875 } 876 } 877 878 static void decompressETC2 (const tcu::PixelBufferAccess& dst, int width, int height, const deUint8* src) 879 { 880 using namespace EtcDecompressInternal; 881 882 const int numBlocksX = divRoundUp(width, 4); 883 const int numBlocksY = divRoundUp(height, 4); 884 deUint8* const dstPtr = (deUint8*)dst.getDataPtr(); 885 const int dstRowPitch = dst.getRowPitch(); 886 const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8; 887 888 for (int blockY = 0; blockY < numBlocksY; blockY++) 889 { 890 for (int blockX = 0; blockX < numBlocksX; blockX++) 891 { 892 const deUint64 compressedBlock = get64BitBlock(src, blockY*numBlocksX + blockX); 893 deUint8 uncompressedBlock[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8]; 894 895 // Decompress. 896 decompressETC2Block(uncompressedBlock, compressedBlock, NULL, false); 897 898 // Write to dst. 899 const int baseX = blockX*ETC2_BLOCK_WIDTH; 900 const int baseY = blockY*ETC2_BLOCK_HEIGHT; 901 for (int y = 0; y < de::min((int)ETC2_BLOCK_HEIGHT, height-baseY); y++) 902 { 903 for (int x = 0; x < de::min((int)ETC2_BLOCK_WIDTH, width-baseX); x++) 904 { 905 const deUint8* const srcPixel = &uncompressedBlock[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8]; 906 deUint8* const dstPixel = dstPtr + (baseY+y)*dstRowPitch + (baseX+x)*dstPixelSize; 907 908 DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8 == 3); 909 dstPixel[0] = srcPixel[0]; 910 dstPixel[1] = srcPixel[1]; 911 dstPixel[2] = srcPixel[2]; 912 } 913 } 914 } 915 } 916 } 917 918 static void decompressETC2_EAC_RGBA8 (const tcu::PixelBufferAccess& dst, int width, int height, const deUint8* src) 919 { 920 using namespace EtcDecompressInternal; 921 922 const int numBlocksX = divRoundUp(width, 4); 923 const int numBlocksY = divRoundUp(height, 4); 924 deUint8* const dstPtr = (deUint8*)dst.getDataPtr(); 925 const int dstRowPitch = dst.getRowPitch(); 926 const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8; 927 928 for (int blockY = 0; blockY < numBlocksY; blockY++) 929 { 930 for (int blockX = 0; blockX < numBlocksX; blockX++) 931 { 932 const deUint64 compressedBlockAlpha = get128BitBlockStart(src, blockY*numBlocksX + blockX); 933 const deUint64 compressedBlockRGB = get128BitBlockEnd(src, blockY*numBlocksX + blockX); 934 deUint8 uncompressedBlockAlpha[ETC2_UNCOMPRESSED_BLOCK_SIZE_A8]; 935 deUint8 uncompressedBlockRGB[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8]; 936 937 // Decompress. 938 decompressETC2Block(uncompressedBlockRGB, compressedBlockRGB, NULL, false); 939 decompressEAC8Block(uncompressedBlockAlpha, compressedBlockAlpha); 940 941 // Write to dst. 942 const int baseX = blockX*ETC2_BLOCK_WIDTH; 943 const int baseY = blockY*ETC2_BLOCK_HEIGHT; 944 for (int y = 0; y < de::min((int)ETC2_BLOCK_HEIGHT, height-baseY); y++) 945 { 946 for (int x = 0; x < de::min((int)ETC2_BLOCK_WIDTH, width-baseX); x++) 947 { 948 const deUint8* const srcPixelRGB = &uncompressedBlockRGB[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8]; 949 const deUint8* const srcPixelAlpha = &uncompressedBlockAlpha[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8]; 950 deUint8* const dstPixel = dstPtr + (baseY+y)*dstRowPitch + (baseX+x)*dstPixelSize; 951 952 DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8 == 4); 953 dstPixel[0] = srcPixelRGB[0]; 954 dstPixel[1] = srcPixelRGB[1]; 955 dstPixel[2] = srcPixelRGB[2]; 956 dstPixel[3] = srcPixelAlpha[0]; 957 } 958 } 959 } 960 } 961 } 962 963 static void decompressETC2_RGB8_PUNCHTHROUGH_ALPHA1 (const tcu::PixelBufferAccess& dst, int width, int height, const deUint8* src) 964 { 965 using namespace EtcDecompressInternal; 966 967 const int numBlocksX = divRoundUp(width, 4); 968 const int numBlocksY = divRoundUp(height, 4); 969 deUint8* const dstPtr = (deUint8*)dst.getDataPtr(); 970 const int dstRowPitch = dst.getRowPitch(); 971 const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8; 972 973 for (int blockY = 0; blockY < numBlocksY; blockY++) 974 { 975 for (int blockX = 0; blockX < numBlocksX; blockX++) 976 { 977 const deUint64 compressedBlockRGBA = get64BitBlock(src, blockY*numBlocksX + blockX); 978 deUint8 uncompressedBlockRGB[ETC2_UNCOMPRESSED_BLOCK_SIZE_RGB8]; 979 deUint8 uncompressedBlockAlpha[ETC2_UNCOMPRESSED_BLOCK_SIZE_A8]; 980 981 // Decompress. 982 decompressETC2Block(uncompressedBlockRGB, compressedBlockRGBA, uncompressedBlockAlpha, DE_TRUE); 983 984 // Write to dst. 985 const int baseX = blockX*ETC2_BLOCK_WIDTH; 986 const int baseY = blockY*ETC2_BLOCK_HEIGHT; 987 for (int y = 0; y < de::min((int)ETC2_BLOCK_HEIGHT, height-baseY); y++) 988 { 989 for (int x = 0; x < de::min((int)ETC2_BLOCK_WIDTH, width-baseX); x++) 990 { 991 const deUint8* const srcPixel = &uncompressedBlockRGB[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_RGB8]; 992 const deUint8* const srcPixelAlpha = &uncompressedBlockAlpha[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_A8]; 993 deUint8* const dstPixel = dstPtr + (baseY+y)*dstRowPitch + (baseX+x)*dstPixelSize; 994 995 DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_RGBA8 == 4); 996 dstPixel[0] = srcPixel[0]; 997 dstPixel[1] = srcPixel[1]; 998 dstPixel[2] = srcPixel[2]; 999 dstPixel[3] = srcPixelAlpha[0]; 1000 } 1001 } 1002 } 1003 } 1004 } 1005 1006 static void decompressEAC_R11 (const tcu::PixelBufferAccess& dst, int width, int height, const deUint8* src, bool signedMode) 1007 { 1008 using namespace EtcDecompressInternal; 1009 1010 const int numBlocksX = divRoundUp(width, 4); 1011 const int numBlocksY = divRoundUp(height, 4); 1012 deUint8* const dstPtr = (deUint8*)dst.getDataPtr(); 1013 const int dstRowPitch = dst.getRowPitch(); 1014 const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_R11; 1015 1016 for (int blockY = 0; blockY < numBlocksY; blockY++) 1017 { 1018 for (int blockX = 0; blockX < numBlocksX; blockX++) 1019 { 1020 const deUint64 compressedBlock = get64BitBlock(src, blockY*numBlocksX + blockX); 1021 deUint8 uncompressedBlock[ETC2_UNCOMPRESSED_BLOCK_SIZE_R11]; 1022 1023 // Decompress. 1024 decompressEAC11Block(uncompressedBlock, compressedBlock, signedMode); 1025 1026 // Write to dst. 1027 const int baseX = blockX*ETC2_BLOCK_WIDTH; 1028 const int baseY = blockY*ETC2_BLOCK_HEIGHT; 1029 for (int y = 0; y < de::min((int)ETC2_BLOCK_HEIGHT, height-baseY); y++) 1030 { 1031 for (int x = 0; x < de::min((int)ETC2_BLOCK_WIDTH, width-baseX); x++) 1032 { 1033 DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_R11 == 2); 1034 1035 if (signedMode) 1036 { 1037 const deInt16* const srcPixel = (deInt16*)&uncompressedBlock[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11]; 1038 deInt16* const dstPixel = (deInt16*)(dstPtr + (baseY+y)*dstRowPitch + (baseX+x)*dstPixelSize); 1039 1040 dstPixel[0] = extend11To16WithSign(srcPixel[0]); 1041 } 1042 else 1043 { 1044 const deUint16* const srcPixel = (deUint16*)&uncompressedBlock[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11]; 1045 deUint16* const dstPixel = (deUint16*)(dstPtr + (baseY+y)*dstRowPitch + (baseX+x)*dstPixelSize); 1046 1047 dstPixel[0] = extend11To16(srcPixel[0]); 1048 } 1049 } 1050 } 1051 } 1052 } 1053 } 1054 1055 static void decompressEAC_RG11 (const tcu::PixelBufferAccess& dst, int width, int height, const deUint8* src, bool signedMode) 1056 { 1057 using namespace EtcDecompressInternal; 1058 1059 const int numBlocksX = divRoundUp(width, 4); 1060 const int numBlocksY = divRoundUp(height, 4); 1061 deUint8* const dstPtr = (deUint8*)dst.getDataPtr(); 1062 const int dstRowPitch = dst.getRowPitch(); 1063 const int dstPixelSize = ETC2_UNCOMPRESSED_PIXEL_SIZE_RG11; 1064 1065 for (int blockY = 0; blockY < numBlocksY; blockY++) 1066 { 1067 for (int blockX = 0; blockX < numBlocksX; blockX++) 1068 { 1069 const deUint64 compressedBlockR = get128BitBlockStart(src, blockY*numBlocksX + blockX); 1070 const deUint64 compressedBlockG = get128BitBlockEnd(src, blockY*numBlocksX + blockX); 1071 deUint8 uncompressedBlockR[ETC2_UNCOMPRESSED_BLOCK_SIZE_R11]; 1072 deUint8 uncompressedBlockG[ETC2_UNCOMPRESSED_BLOCK_SIZE_R11]; 1073 1074 // Decompress. 1075 decompressEAC11Block(uncompressedBlockR, compressedBlockR, signedMode); 1076 decompressEAC11Block(uncompressedBlockG, compressedBlockG, signedMode); 1077 1078 // Write to dst. 1079 const int baseX = blockX*ETC2_BLOCK_WIDTH; 1080 const int baseY = blockY*ETC2_BLOCK_HEIGHT; 1081 for (int y = 0; y < de::min((int)ETC2_BLOCK_HEIGHT, height-baseY); y++) 1082 { 1083 for (int x = 0; x < de::min((int)ETC2_BLOCK_WIDTH, width-baseX); x++) 1084 { 1085 DE_STATIC_ASSERT(ETC2_UNCOMPRESSED_PIXEL_SIZE_RG11 == 4); 1086 1087 if (signedMode) 1088 { 1089 const deInt16* const srcPixelR = (deInt16*)&uncompressedBlockR[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11]; 1090 const deInt16* const srcPixelG = (deInt16*)&uncompressedBlockG[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11]; 1091 deInt16* const dstPixel = (deInt16*)(dstPtr + (baseY+y)*dstRowPitch + (baseX+x)*dstPixelSize); 1092 1093 dstPixel[0] = extend11To16WithSign(srcPixelR[0]); 1094 dstPixel[1] = extend11To16WithSign(srcPixelG[0]); 1095 } 1096 else 1097 { 1098 const deUint16* const srcPixelR = (deUint16*)&uncompressedBlockR[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11]; 1099 const deUint16* const srcPixelG = (deUint16*)&uncompressedBlockG[(y*ETC2_BLOCK_WIDTH + x)*ETC2_UNCOMPRESSED_PIXEL_SIZE_R11]; 1100 deUint16* const dstPixel = (deUint16*)(dstPtr + (baseY+y)*dstRowPitch + (baseX+x)*dstPixelSize); 1101 1102 dstPixel[0] = extend11To16(srcPixelR[0]); 1103 dstPixel[1] = extend11To16(srcPixelG[0]); 1104 } 1105 } 1106 } 1107 } 1108 } 1109 } 1110 1111 namespace ASTCDecompressInternal 1112 { 1113 1114 enum 1115 { 1116 ASTC_MAX_BLOCK_WIDTH = 12, 1117 ASTC_MAX_BLOCK_HEIGHT = 12 1118 }; 1119 1120 static inline deUint32 getBit (deUint32 src, int ndx) 1121 { 1122 DE_ASSERT(de::inBounds(ndx, 0, 32)); 1123 return (src >> ndx) & 1; 1124 } 1125 1126 static inline deUint32 getBits (deUint32 src, int low, int high) 1127 { 1128 const int numBits = (high-low) + 1; 1129 DE_ASSERT(de::inRange(numBits, 1, 32)); 1130 return (src >> low) & ((1u<<numBits)-1); 1131 } 1132 1133 static inline bool isBitSet (deUint32 src, int ndx) 1134 { 1135 return getBit(src, ndx) != 0; 1136 } 1137 1138 static inline deUint32 reverseBits (deUint32 src, int numBits) 1139 { 1140 DE_ASSERT(de::inRange(numBits, 0, 32)); 1141 deUint32 result = 0; 1142 for (int i = 0; i < numBits; i++) 1143 result |= ((src >> i) & 1) << (numBits-1-i); 1144 return result; 1145 } 1146 1147 static inline deUint32 bitReplicationScale (deUint32 src, int numSrcBits, int numDstBits) 1148 { 1149 DE_ASSERT(numSrcBits <= numDstBits); 1150 DE_ASSERT((src & ((1<<numSrcBits)-1)) == src); 1151 deUint32 dst = 0; 1152 for (int shift = numDstBits-numSrcBits; shift > -numSrcBits; shift -= numSrcBits) 1153 dst |= shift >= 0 ? src << shift : src >> -shift; 1154 return dst; 1155 } 1156 1157 static inline deInt32 signExtend (deInt32 src, int numSrcBits) 1158 { 1159 DE_ASSERT(de::inRange(numSrcBits, 2, 31)); 1160 const bool negative = (src & (1 << (numSrcBits-1))) != 0; 1161 return src | (negative ? ~((1 << numSrcBits) - 1) : 0); 1162 } 1163 1164 static inline bool isFloat16InfOrNan (deFloat16 v) 1165 { 1166 return getBits(v, 10, 14) == 31; 1167 } 1168 1169 // A helper for getting bits from a 128-bit block. 1170 class Block128 1171 { 1172 private: 1173 typedef deUint64 Word; 1174 1175 enum 1176 { 1177 WORD_BYTES = sizeof(Word), 1178 WORD_BITS = 8*WORD_BYTES, 1179 NUM_WORDS = 128 / WORD_BITS 1180 }; 1181 1182 DE_STATIC_ASSERT(128 % WORD_BITS == 0); 1183 1184 public: 1185 Block128 (const deUint8* src) 1186 { 1187 for (int wordNdx = 0; wordNdx < NUM_WORDS; wordNdx++) 1188 { 1189 m_words[wordNdx] = 0; 1190 for (int byteNdx = 0; byteNdx < WORD_BYTES; byteNdx++) 1191 m_words[wordNdx] |= (Word)src[wordNdx*WORD_BYTES + byteNdx] << (8*byteNdx); 1192 } 1193 } 1194 1195 deUint32 getBit (int ndx) const 1196 { 1197 DE_ASSERT(de::inBounds(ndx, 0, 128)); 1198 return (m_words[ndx / WORD_BITS] >> (ndx % WORD_BITS)) & 1; 1199 } 1200 1201 deUint32 getBits (int low, int high) const 1202 { 1203 DE_ASSERT(de::inBounds(low, 0, 128)); 1204 DE_ASSERT(de::inBounds(high, 0, 128)); 1205 DE_ASSERT(de::inRange(high-low+1, 0, 32)); 1206 1207 if (high-low+1 == 0) 1208 return 0; 1209 1210 const int word0Ndx = low / WORD_BITS; 1211 const int word1Ndx = high / WORD_BITS; 1212 1213 // \note "foo << bar << 1" done instead of "foo << (bar+1)" to avoid overflow, i.e. shift amount being too big. 1214 1215 if (word0Ndx == word1Ndx) 1216 return (m_words[word0Ndx] & ((((Word)1 << high%WORD_BITS << 1) - 1))) >> ((Word)low % WORD_BITS); 1217 else 1218 { 1219 DE_ASSERT(word1Ndx == word0Ndx + 1); 1220 1221 return (deUint32)(m_words[word0Ndx] >> (low%WORD_BITS)) | 1222 (deUint32)((m_words[word1Ndx] & (((Word)1 << high%WORD_BITS << 1) - 1)) << (high-low - high%WORD_BITS)); 1223 } 1224 } 1225 1226 bool isBitSet (int ndx) const 1227 { 1228 DE_ASSERT(de::inBounds(ndx, 0, 128)); 1229 return getBit(ndx) != 0; 1230 } 1231 1232 private: 1233 Word m_words[NUM_WORDS]; 1234 }; 1235 1236 // A helper for sequential access into a Block128. 1237 class BitAccessStream 1238 { 1239 public: 1240 BitAccessStream (const Block128& src, int startNdxInSrc, int length, bool forward) 1241 : m_src (src) 1242 , m_startNdxInSrc (startNdxInSrc) 1243 , m_length (length) 1244 , m_forward (forward) 1245 , m_ndx (0) 1246 { 1247 } 1248 1249 // Get the next num bits. Bits at positions greater than or equal to m_length are zeros. 1250 deUint32 getNext (int num) 1251 { 1252 if (num == 0 || m_ndx >= m_length) 1253 return 0; 1254 1255 const int end = m_ndx + num; 1256 const int numBitsFromSrc = de::max(0, de::min(m_length, end) - m_ndx); 1257 const int low = m_ndx; 1258 const int high = m_ndx + numBitsFromSrc - 1; 1259 1260 m_ndx += num; 1261 1262 return m_forward ? m_src.getBits(m_startNdxInSrc + low, m_startNdxInSrc + high) 1263 : reverseBits(m_src.getBits(m_startNdxInSrc - high, m_startNdxInSrc - low), numBitsFromSrc); 1264 } 1265 1266 private: 1267 const Block128& m_src; 1268 const int m_startNdxInSrc; 1269 const int m_length; 1270 const bool m_forward; 1271 1272 int m_ndx; 1273 }; 1274 1275 enum ISEMode 1276 { 1277 ISEMODE_TRIT = 0, 1278 ISEMODE_QUINT, 1279 ISEMODE_PLAIN_BIT, 1280 1281 ISEMODE_LAST 1282 }; 1283 1284 struct ISEParams 1285 { 1286 ISEMode mode; 1287 int numBits; 1288 1289 ISEParams (ISEMode mode_, int numBits_) : mode(mode_), numBits(numBits_) {} 1290 }; 1291 1292 static inline int computeNumRequiredBits (const ISEParams& iseParams, int numValues) 1293 { 1294 switch (iseParams.mode) 1295 { 1296 case ISEMODE_TRIT: return divRoundUp(numValues*8, 5) + numValues*iseParams.numBits; 1297 case ISEMODE_QUINT: return divRoundUp(numValues*7, 3) + numValues*iseParams.numBits; 1298 case ISEMODE_PLAIN_BIT: return numValues*iseParams.numBits; 1299 default: 1300 DE_ASSERT(false); 1301 return -1; 1302 } 1303 } 1304 1305 struct ISEDecodedResult 1306 { 1307 deUint32 m; 1308 deUint32 tq; //!< Trit or quint value, depending on ISE mode. 1309 deUint32 v; 1310 }; 1311 1312 // Data from an ASTC block's "block mode" part (i.e. bits [0,10]). 1313 struct ASTCBlockMode 1314 { 1315 bool isError; 1316 // \note Following fields only relevant if !isError. 1317 bool isVoidExtent; 1318 // \note Following fields only relevant if !isVoidExtent. 1319 bool isDualPlane; 1320 int weightGridWidth; 1321 int weightGridHeight; 1322 ISEParams weightISEParams; 1323 1324 ASTCBlockMode (void) 1325 : isError (true) 1326 , isVoidExtent (true) 1327 , isDualPlane (true) 1328 , weightGridWidth (-1) 1329 , weightGridHeight (-1) 1330 , weightISEParams (ISEMODE_LAST, -1) 1331 { 1332 } 1333 }; 1334 1335 static inline int computeNumWeights (const ASTCBlockMode& mode) 1336 { 1337 return mode.weightGridWidth * mode.weightGridHeight * (mode.isDualPlane ? 2 : 1); 1338 } 1339 1340 struct ColorEndpointPair 1341 { 1342 UVec4 e0; 1343 UVec4 e1; 1344 }; 1345 1346 struct TexelWeightPair 1347 { 1348 deUint32 w[2]; 1349 }; 1350 1351 static ASTCBlockMode getASTCBlockMode (deUint32 blockModeData) 1352 { 1353 ASTCBlockMode blockMode; 1354 blockMode.isError = true; // \note Set to false later, if not error. 1355 1356 blockMode.isVoidExtent = getBits(blockModeData, 0, 8) == 0x1fc; 1357 1358 if (!blockMode.isVoidExtent) 1359 { 1360 if ((getBits(blockModeData, 0, 1) == 0 && getBits(blockModeData, 6, 8) == 7) || getBits(blockModeData, 0, 3) == 0) 1361 return blockMode; // Invalid ("reserved"). 1362 1363 deUint32 r = (deUint32)-1; // \note Set in the following branches. 1364 1365 if (getBits(blockModeData, 0, 1) == 0) 1366 { 1367 const deUint32 r0 = getBit(blockModeData, 4); 1368 const deUint32 r1 = getBit(blockModeData, 2); 1369 const deUint32 r2 = getBit(blockModeData, 3); 1370 const deUint32 i78 = getBits(blockModeData, 7, 8); 1371 1372 r = (r2 << 2) | (r1 << 1) | (r0 << 0); 1373 1374 if (i78 == 3) 1375 { 1376 const bool i5 = isBitSet(blockModeData, 5); 1377 blockMode.weightGridWidth = i5 ? 10 : 6; 1378 blockMode.weightGridHeight = i5 ? 6 : 10; 1379 } 1380 else 1381 { 1382 const deUint32 a = getBits(blockModeData, 5, 6); 1383 switch (i78) 1384 { 1385 case 0: blockMode.weightGridWidth = 12; blockMode.weightGridHeight = a + 2; break; 1386 case 1: blockMode.weightGridWidth = a + 2; blockMode.weightGridHeight = 12; break; 1387 case 2: blockMode.weightGridWidth = a + 6; blockMode.weightGridHeight = getBits(blockModeData, 9, 10) + 6; break; 1388 default: DE_ASSERT(false); 1389 } 1390 } 1391 } 1392 else 1393 { 1394 const deUint32 r0 = getBit(blockModeData, 4); 1395 const deUint32 r1 = getBit(blockModeData, 0); 1396 const deUint32 r2 = getBit(blockModeData, 1); 1397 const deUint32 i23 = getBits(blockModeData, 2, 3); 1398 const deUint32 a = getBits(blockModeData, 5, 6); 1399 1400 r = (r2 << 2) | (r1 << 1) | (r0 << 0); 1401 1402 if (i23 == 3) 1403 { 1404 const deUint32 b = getBit(blockModeData, 7); 1405 const bool i8 = isBitSet(blockModeData, 8); 1406 blockMode.weightGridWidth = i8 ? b+2 : a+2; 1407 blockMode.weightGridHeight = i8 ? a+2 : b+6; 1408 } 1409 else 1410 { 1411 const deUint32 b = getBits(blockModeData, 7, 8); 1412 1413 switch (i23) 1414 { 1415 case 0: blockMode.weightGridWidth = b + 4; blockMode.weightGridHeight = a + 2; break; 1416 case 1: blockMode.weightGridWidth = b + 8; blockMode.weightGridHeight = a + 2; break; 1417 case 2: blockMode.weightGridWidth = a + 2; blockMode.weightGridHeight = b + 8; break; 1418 default: DE_ASSERT(false); 1419 } 1420 } 1421 } 1422 1423 const bool zeroDH = getBits(blockModeData, 0, 1) == 0 && getBits(blockModeData, 7, 8) == 2; 1424 const bool h = zeroDH ? 0 : isBitSet(blockModeData, 9); 1425 blockMode.isDualPlane = zeroDH ? 0 : isBitSet(blockModeData, 10); 1426 1427 { 1428 ISEMode& m = blockMode.weightISEParams.mode; 1429 int& b = blockMode.weightISEParams.numBits; 1430 m = ISEMODE_PLAIN_BIT; 1431 b = 0; 1432 1433 if (h) 1434 { 1435 switch (r) 1436 { 1437 case 2: m = ISEMODE_QUINT; b = 1; break; 1438 case 3: m = ISEMODE_TRIT; b = 2; break; 1439 case 4: b = 4; break; 1440 case 5: m = ISEMODE_QUINT; b = 2; break; 1441 case 6: m = ISEMODE_TRIT; b = 3; break; 1442 case 7: b = 5; break; 1443 default: DE_ASSERT(false); 1444 } 1445 } 1446 else 1447 { 1448 switch (r) 1449 { 1450 case 2: b = 1; break; 1451 case 3: m = ISEMODE_TRIT; break; 1452 case 4: b = 2; break; 1453 case 5: m = ISEMODE_QUINT; break; 1454 case 6: m = ISEMODE_TRIT; b = 1; break; 1455 case 7: b = 3; break; 1456 default: DE_ASSERT(false); 1457 } 1458 } 1459 } 1460 } 1461 1462 blockMode.isError = false; 1463 return blockMode; 1464 } 1465 1466 static inline void setASTCErrorColorBlock (void* dst, int blockWidth, int blockHeight, bool isSRGB) 1467 { 1468 if (isSRGB) 1469 { 1470 deUint8* const dstU = (deUint8*)dst; 1471 1472 for (int i = 0; i < blockWidth*blockHeight; i++) 1473 { 1474 dstU[4*i + 0] = 0xff; 1475 dstU[4*i + 1] = 0; 1476 dstU[4*i + 2] = 0xff; 1477 dstU[4*i + 3] = 0xff; 1478 } 1479 } 1480 else 1481 { 1482 float* const dstF = (float*)dst; 1483 1484 for (int i = 0; i < blockWidth*blockHeight; i++) 1485 { 1486 dstF[4*i + 0] = 1.0f; 1487 dstF[4*i + 1] = 0.0f; 1488 dstF[4*i + 2] = 1.0f; 1489 dstF[4*i + 3] = 1.0f; 1490 } 1491 } 1492 } 1493 1494 static void decodeVoidExtentBlock (void* dst, const Block128& blockData, int blockWidth, int blockHeight, bool isSRGB, bool isLDRMode) 1495 { 1496 const deUint32 minSExtent = blockData.getBits(12, 24); 1497 const deUint32 maxSExtent = blockData.getBits(25, 37); 1498 const deUint32 minTExtent = blockData.getBits(38, 50); 1499 const deUint32 maxTExtent = blockData.getBits(51, 63); 1500 const bool allExtentsAllOnes = minSExtent == 0x1fff && maxSExtent == 0x1fff && minTExtent == 0x1fff && maxTExtent == 0x1fff; 1501 const bool isHDRBlock = blockData.isBitSet(9); 1502 1503 if ((isLDRMode && isHDRBlock) || (!allExtentsAllOnes && (minSExtent >= maxSExtent || minTExtent >= maxTExtent))) 1504 { 1505 setASTCErrorColorBlock(dst, blockWidth, blockHeight, isSRGB); 1506 return; 1507 } 1508 1509 const deUint32 rgba[4] = 1510 { 1511 blockData.getBits(64, 79), 1512 blockData.getBits(80, 95), 1513 blockData.getBits(96, 111), 1514 blockData.getBits(112, 127) 1515 }; 1516 1517 if (isSRGB) 1518 { 1519 deUint8* const dstU = (deUint8*)dst; 1520 for (int i = 0; i < blockWidth*blockHeight; i++) 1521 for (int c = 0; c < 4; c++) 1522 dstU[i*4 + c] = (rgba[c] & 0xff00) >> 8; 1523 } 1524 else 1525 { 1526 float* const dstF = (float*)dst; 1527 1528 if (isHDRBlock) 1529 { 1530 for (int c = 0; c < 4; c++) 1531 { 1532 if (isFloat16InfOrNan(rgba[c])) 1533 throw tcu::InternalError("Infinity or NaN color component in HDR void extent block in ASTC texture (behavior undefined by ASTC specification)"); 1534 } 1535 1536 for (int i = 0; i < blockWidth*blockHeight; i++) 1537 for (int c = 0; c < 4; c++) 1538 dstF[i*4 + c] = deFloat16To32((deFloat16)rgba[c]); 1539 } 1540 else 1541 { 1542 for (int i = 0; i < blockWidth*blockHeight; i++) 1543 for (int c = 0; c < 4; c++) 1544 dstF[i*4 + c] = rgba[c] == 65535 ? 1.0f : (float)rgba[c] / 65536.0f; 1545 } 1546 } 1547 1548 return; 1549 } 1550 1551 static void decodeColorEndpointModes (deUint32* endpointModesDst, const Block128& blockData, int numPartitions, int extraCemBitsStart) 1552 { 1553 if (numPartitions == 1) 1554 endpointModesDst[0] = blockData.getBits(13, 16); 1555 else 1556 { 1557 const deUint32 highLevelSelector = blockData.getBits(23, 24); 1558 1559 if (highLevelSelector == 0) 1560 { 1561 const deUint32 mode = blockData.getBits(25, 28); 1562 for (int i = 0; i < numPartitions; i++) 1563 endpointModesDst[i] = mode; 1564 } 1565 else 1566 { 1567 for (int partNdx = 0; partNdx < numPartitions; partNdx++) 1568 { 1569 const deUint32 cemClass = highLevelSelector - (blockData.isBitSet(25 + partNdx) ? 0 : 1); 1570 const deUint32 lowBit0Ndx = numPartitions + 2*partNdx; 1571 const deUint32 lowBit1Ndx = numPartitions + 2*partNdx + 1; 1572 const deUint32 lowBit0 = blockData.getBit(lowBit0Ndx < 4 ? 25+lowBit0Ndx : extraCemBitsStart+lowBit0Ndx-4); 1573 const deUint32 lowBit1 = blockData.getBit(lowBit1Ndx < 4 ? 25+lowBit1Ndx : extraCemBitsStart+lowBit1Ndx-4); 1574 1575 endpointModesDst[partNdx] = (cemClass << 2) | (lowBit1 << 1) | lowBit0; 1576 } 1577 } 1578 } 1579 } 1580 1581 static inline int computeNumColorEndpointValues (deUint32 endpointMode) 1582 { 1583 DE_ASSERT(endpointMode < 16); 1584 return (endpointMode/4 + 1) * 2; 1585 } 1586 1587 static int computeNumColorEndpointValues (const deUint32* endpointModes, int numPartitions) 1588 { 1589 int result = 0; 1590 for (int i = 0; i < numPartitions; i++) 1591 result += computeNumColorEndpointValues(endpointModes[i]); 1592 return result; 1593 } 1594 1595 static void decodeISETritBlock (ISEDecodedResult* dst, int numValues, BitAccessStream& data, int numBits) 1596 { 1597 DE_ASSERT(de::inRange(numValues, 1, 5)); 1598 1599 deUint32 m[5]; 1600 1601 m[0] = data.getNext(numBits); 1602 deUint32 T01 = data.getNext(2); 1603 m[1] = data.getNext(numBits); 1604 deUint32 T23 = data.getNext(2); 1605 m[2] = data.getNext(numBits); 1606 deUint32 T4 = data.getNext(1); 1607 m[3] = data.getNext(numBits); 1608 deUint32 T56 = data.getNext(2); 1609 m[4] = data.getNext(numBits); 1610 deUint32 T7 = data.getNext(1); 1611 1612 switch (numValues) 1613 { 1614 // \note Fall-throughs. 1615 case 1: T23 = 0; 1616 case 2: T4 = 0; 1617 case 3: T56 = 0; 1618 case 4: T7 = 0; 1619 case 5: break; 1620 default: 1621 DE_ASSERT(false); 1622 } 1623 1624 const deUint32 T = (T7 << 7) | (T56 << 5) | (T4 << 4) | (T23 << 2) | (T01 << 0); 1625 1626 static const deUint32 tritsFromT[256][5] = 1627 { 1628 { 0,0,0,0,0 }, { 1,0,0,0,0 }, { 2,0,0,0,0 }, { 0,0,2,0,0 }, { 0,1,0,0,0 }, { 1,1,0,0,0 }, { 2,1,0,0,0 }, { 1,0,2,0,0 }, { 0,2,0,0,0 }, { 1,2,0,0,0 }, { 2,2,0,0,0 }, { 2,0,2,0,0 }, { 0,2,2,0,0 }, { 1,2,2,0,0 }, { 2,2,2,0,0 }, { 2,0,2,0,0 }, 1629 { 0,0,1,0,0 }, { 1,0,1,0,0 }, { 2,0,1,0,0 }, { 0,1,2,0,0 }, { 0,1,1,0,0 }, { 1,1,1,0,0 }, { 2,1,1,0,0 }, { 1,1,2,0,0 }, { 0,2,1,0,0 }, { 1,2,1,0,0 }, { 2,2,1,0,0 }, { 2,1,2,0,0 }, { 0,0,0,2,2 }, { 1,0,0,2,2 }, { 2,0,0,2,2 }, { 0,0,2,2,2 }, 1630 { 0,0,0,1,0 }, { 1,0,0,1,0 }, { 2,0,0,1,0 }, { 0,0,2,1,0 }, { 0,1,0,1,0 }, { 1,1,0,1,0 }, { 2,1,0,1,0 }, { 1,0,2,1,0 }, { 0,2,0,1,0 }, { 1,2,0,1,0 }, { 2,2,0,1,0 }, { 2,0,2,1,0 }, { 0,2,2,1,0 }, { 1,2,2,1,0 }, { 2,2,2,1,0 }, { 2,0,2,1,0 }, 1631 { 0,0,1,1,0 }, { 1,0,1,1,0 }, { 2,0,1,1,0 }, { 0,1,2,1,0 }, { 0,1,1,1,0 }, { 1,1,1,1,0 }, { 2,1,1,1,0 }, { 1,1,2,1,0 }, { 0,2,1,1,0 }, { 1,2,1,1,0 }, { 2,2,1,1,0 }, { 2,1,2,1,0 }, { 0,1,0,2,2 }, { 1,1,0,2,2 }, { 2,1,0,2,2 }, { 1,0,2,2,2 }, 1632 { 0,0,0,2,0 }, { 1,0,0,2,0 }, { 2,0,0,2,0 }, { 0,0,2,2,0 }, { 0,1,0,2,0 }, { 1,1,0,2,0 }, { 2,1,0,2,0 }, { 1,0,2,2,0 }, { 0,2,0,2,0 }, { 1,2,0,2,0 }, { 2,2,0,2,0 }, { 2,0,2,2,0 }, { 0,2,2,2,0 }, { 1,2,2,2,0 }, { 2,2,2,2,0 }, { 2,0,2,2,0 }, 1633 { 0,0,1,2,0 }, { 1,0,1,2,0 }, { 2,0,1,2,0 }, { 0,1,2,2,0 }, { 0,1,1,2,0 }, { 1,1,1,2,0 }, { 2,1,1,2,0 }, { 1,1,2,2,0 }, { 0,2,1,2,0 }, { 1,2,1,2,0 }, { 2,2,1,2,0 }, { 2,1,2,2,0 }, { 0,2,0,2,2 }, { 1,2,0,2,2 }, { 2,2,0,2,2 }, { 2,0,2,2,2 }, 1634 { 0,0,0,0,2 }, { 1,0,0,0,2 }, { 2,0,0,0,2 }, { 0,0,2,0,2 }, { 0,1,0,0,2 }, { 1,1,0,0,2 }, { 2,1,0,0,2 }, { 1,0,2,0,2 }, { 0,2,0,0,2 }, { 1,2,0,0,2 }, { 2,2,0,0,2 }, { 2,0,2,0,2 }, { 0,2,2,0,2 }, { 1,2,2,0,2 }, { 2,2,2,0,2 }, { 2,0,2,0,2 }, 1635 { 0,0,1,0,2 }, { 1,0,1,0,2 }, { 2,0,1,0,2 }, { 0,1,2,0,2 }, { 0,1,1,0,2 }, { 1,1,1,0,2 }, { 2,1,1,0,2 }, { 1,1,2,0,2 }, { 0,2,1,0,2 }, { 1,2,1,0,2 }, { 2,2,1,0,2 }, { 2,1,2,0,2 }, { 0,2,2,2,2 }, { 1,2,2,2,2 }, { 2,2,2,2,2 }, { 2,0,2,2,2 }, 1636 { 0,0,0,0,1 }, { 1,0,0,0,1 }, { 2,0,0,0,1 }, { 0,0,2,0,1 }, { 0,1,0,0,1 }, { 1,1,0,0,1 }, { 2,1,0,0,1 }, { 1,0,2,0,1 }, { 0,2,0,0,1 }, { 1,2,0,0,1 }, { 2,2,0,0,1 }, { 2,0,2,0,1 }, { 0,2,2,0,1 }, { 1,2,2,0,1 }, { 2,2,2,0,1 }, { 2,0,2,0,1 }, 1637 { 0,0,1,0,1 }, { 1,0,1,0,1 }, { 2,0,1,0,1 }, { 0,1,2,0,1 }, { 0,1,1,0,1 }, { 1,1,1,0,1 }, { 2,1,1,0,1 }, { 1,1,2,0,1 }, { 0,2,1,0,1 }, { 1,2,1,0,1 }, { 2,2,1,0,1 }, { 2,1,2,0,1 }, { 0,0,1,2,2 }, { 1,0,1,2,2 }, { 2,0,1,2,2 }, { 0,1,2,2,2 }, 1638 { 0,0,0,1,1 }, { 1,0,0,1,1 }, { 2,0,0,1,1 }, { 0,0,2,1,1 }, { 0,1,0,1,1 }, { 1,1,0,1,1 }, { 2,1,0,1,1 }, { 1,0,2,1,1 }, { 0,2,0,1,1 }, { 1,2,0,1,1 }, { 2,2,0,1,1 }, { 2,0,2,1,1 }, { 0,2,2,1,1 }, { 1,2,2,1,1 }, { 2,2,2,1,1 }, { 2,0,2,1,1 }, 1639 { 0,0,1,1,1 }, { 1,0,1,1,1 }, { 2,0,1,1,1 }, { 0,1,2,1,1 }, { 0,1,1,1,1 }, { 1,1,1,1,1 }, { 2,1,1,1,1 }, { 1,1,2,1,1 }, { 0,2,1,1,1 }, { 1,2,1,1,1 }, { 2,2,1,1,1 }, { 2,1,2,1,1 }, { 0,1,1,2,2 }, { 1,1,1,2,2 }, { 2,1,1,2,2 }, { 1,1,2,2,2 }, 1640 { 0,0,0,2,1 }, { 1,0,0,2,1 }, { 2,0,0,2,1 }, { 0,0,2,2,1 }, { 0,1,0,2,1 }, { 1,1,0,2,1 }, { 2,1,0,2,1 }, { 1,0,2,2,1 }, { 0,2,0,2,1 }, { 1,2,0,2,1 }, { 2,2,0,2,1 }, { 2,0,2,2,1 }, { 0,2,2,2,1 }, { 1,2,2,2,1 }, { 2,2,2,2,1 }, { 2,0,2,2,1 }, 1641 { 0,0,1,2,1 }, { 1,0,1,2,1 }, { 2,0,1,2,1 }, { 0,1,2,2,1 }, { 0,1,1,2,1 }, { 1,1,1,2,1 }, { 2,1,1,2,1 }, { 1,1,2,2,1 }, { 0,2,1,2,1 }, { 1,2,1,2,1 }, { 2,2,1,2,1 }, { 2,1,2,2,1 }, { 0,2,1,2,2 }, { 1,2,1,2,2 }, { 2,2,1,2,2 }, { 2,1,2,2,2 }, 1642 { 0,0,0,1,2 }, { 1,0,0,1,2 }, { 2,0,0,1,2 }, { 0,0,2,1,2 }, { 0,1,0,1,2 }, { 1,1,0,1,2 }, { 2,1,0,1,2 }, { 1,0,2,1,2 }, { 0,2,0,1,2 }, { 1,2,0,1,2 }, { 2,2,0,1,2 }, { 2,0,2,1,2 }, { 0,2,2,1,2 }, { 1,2,2,1,2 }, { 2,2,2,1,2 }, { 2,0,2,1,2 }, 1643 { 0,0,1,1,2 }, { 1,0,1,1,2 }, { 2,0,1,1,2 }, { 0,1,2,1,2 }, { 0,1,1,1,2 }, { 1,1,1,1,2 }, { 2,1,1,1,2 }, { 1,1,2,1,2 }, { 0,2,1,1,2 }, { 1,2,1,1,2 }, { 2,2,1,1,2 }, { 2,1,2,1,2 }, { 0,2,2,2,2 }, { 1,2,2,2,2 }, { 2,2,2,2,2 }, { 2,1,2,2,2 } 1644 }; 1645 1646 const deUint32 (& trits)[5] = tritsFromT[T]; 1647 1648 for (int i = 0; i < numValues; i++) 1649 { 1650 dst[i].m = m[i]; 1651 dst[i].tq = trits[i]; 1652 dst[i].v = (trits[i] << numBits) + m[i]; 1653 } 1654 } 1655 1656 static void decodeISEQuintBlock (ISEDecodedResult* dst, int numValues, BitAccessStream& data, int numBits) 1657 { 1658 DE_ASSERT(de::inRange(numValues, 1, 3)); 1659 1660 deUint32 m[3]; 1661 1662 m[0] = data.getNext(numBits); 1663 deUint32 Q012 = data.getNext(3); 1664 m[1] = data.getNext(numBits); 1665 deUint32 Q34 = data.getNext(2); 1666 m[2] = data.getNext(numBits); 1667 deUint32 Q56 = data.getNext(2); 1668 1669 switch (numValues) 1670 { 1671 // \note Fall-throughs. 1672 case 1: Q34 = 0; 1673 case 2: Q56 = 0; 1674 case 3: break; 1675 default: 1676 DE_ASSERT(false); 1677 } 1678 1679 const deUint32 Q = (Q56 << 5) | (Q34 << 3) | (Q012 << 0); 1680 1681 static const deUint32 quintsFromQ[256][3] = 1682 { 1683 { 0,0,0 }, { 1,0,0 }, { 2,0,0 }, { 3,0,0 }, { 4,0,0 }, { 0,4,0 }, { 4,4,0 }, { 4,4,4 }, { 0,1,0 }, { 1,1,0 }, { 2,1,0 }, { 3,1,0 }, { 4,1,0 }, { 1,4,0 }, { 4,4,1 }, { 4,4,4 }, 1684 { 0,2,0 }, { 1,2,0 }, { 2,2,0 }, { 3,2,0 }, { 4,2,0 }, { 2,4,0 }, { 4,4,2 }, { 4,4,4 }, { 0,3,0 }, { 1,3,0 }, { 2,3,0 }, { 3,3,0 }, { 4,3,0 }, { 3,4,0 }, { 4,4,3 }, { 4,4,4 }, 1685 { 0,0,1 }, { 1,0,1 }, { 2,0,1 }, { 3,0,1 }, { 4,0,1 }, { 0,4,1 }, { 4,0,4 }, { 0,4,4 }, { 0,1,1 }, { 1,1,1 }, { 2,1,1 }, { 3,1,1 }, { 4,1,1 }, { 1,4,1 }, { 4,1,4 }, { 1,4,4 }, 1686 { 0,2,1 }, { 1,2,1 }, { 2,2,1 }, { 3,2,1 }, { 4,2,1 }, { 2,4,1 }, { 4,2,4 }, { 2,4,4 }, { 0,3,1 }, { 1,3,1 }, { 2,3,1 }, { 3,3,1 }, { 4,3,1 }, { 3,4,1 }, { 4,3,4 }, { 3,4,4 }, 1687 { 0,0,2 }, { 1,0,2 }, { 2,0,2 }, { 3,0,2 }, { 4,0,2 }, { 0,4,2 }, { 2,0,4 }, { 3,0,4 }, { 0,1,2 }, { 1,1,2 }, { 2,1,2 }, { 3,1,2 }, { 4,1,2 }, { 1,4,2 }, { 2,1,4 }, { 3,1,4 }, 1688 { 0,2,2 }, { 1,2,2 }, { 2,2,2 }, { 3,2,2 }, { 4,2,2 }, { 2,4,2 }, { 2,2,4 }, { 3,2,4 }, { 0,3,2 }, { 1,3,2 }, { 2,3,2 }, { 3,3,2 }, { 4,3,2 }, { 3,4,2 }, { 2,3,4 }, { 3,3,4 }, 1689 { 0,0,3 }, { 1,0,3 }, { 2,0,3 }, { 3,0,3 }, { 4,0,3 }, { 0,4,3 }, { 0,0,4 }, { 1,0,4 }, { 0,1,3 }, { 1,1,3 }, { 2,1,3 }, { 3,1,3 }, { 4,1,3 }, { 1,4,3 }, { 0,1,4 }, { 1,1,4 }, 1690 { 0,2,3 }, { 1,2,3 }, { 2,2,3 }, { 3,2,3 }, { 4,2,3 }, { 2,4,3 }, { 0,2,4 }, { 1,2,4 }, { 0,3,3 }, { 1,3,3 }, { 2,3,3 }, { 3,3,3 }, { 4,3,3 }, { 3,4,3 }, { 0,3,4 }, { 1,3,4 } 1691 }; 1692 1693 const deUint32 (& quints)[3] = quintsFromQ[Q]; 1694 1695 for (int i = 0; i < numValues; i++) 1696 { 1697 dst[i].m = m[i]; 1698 dst[i].tq = quints[i]; 1699 dst[i].v = (quints[i] << numBits) + m[i]; 1700 } 1701 } 1702 1703 static inline void decodeISEBitBlock (ISEDecodedResult* dst, BitAccessStream& data, int numBits) 1704 { 1705 dst[0].m = data.getNext(numBits); 1706 dst[0].v = dst[0].m; 1707 } 1708 1709 static void decodeISE (ISEDecodedResult* dst, int numValues, BitAccessStream& data, const ISEParams& params) 1710 { 1711 if (params.mode == ISEMODE_TRIT) 1712 { 1713 const int numBlocks = divRoundUp(numValues, 5); 1714 for (int blockNdx = 0; blockNdx < numBlocks; blockNdx++) 1715 { 1716 const int numValuesInBlock = blockNdx == numBlocks-1 ? numValues - 5*(numBlocks-1) : 5; 1717 decodeISETritBlock(&dst[5*blockNdx], numValuesInBlock, data, params.numBits); 1718 } 1719 } 1720 else if (params.mode == ISEMODE_QUINT) 1721 { 1722 const int numBlocks = divRoundUp(numValues, 3); 1723 for (int blockNdx = 0; blockNdx < numBlocks; blockNdx++) 1724 { 1725 const int numValuesInBlock = blockNdx == numBlocks-1 ? numValues - 3*(numBlocks-1) : 3; 1726 decodeISEQuintBlock(&dst[3*blockNdx], numValuesInBlock, data, params.numBits); 1727 } 1728 } 1729 else 1730 { 1731 DE_ASSERT(params.mode == ISEMODE_PLAIN_BIT); 1732 for (int i = 0; i < numValues; i++) 1733 decodeISEBitBlock(&dst[i], data, params.numBits); 1734 } 1735 } 1736 1737 static ISEParams computeMaximumRangeISEParams (int numAvailableBits, int numValuesInSequence) 1738 { 1739 int curBitsForTritMode = 6; 1740 int curBitsForQuintMode = 5; 1741 int curBitsForPlainBitMode = 8; 1742 1743 while (true) 1744 { 1745 DE_ASSERT(curBitsForTritMode > 0 || curBitsForQuintMode > 0 || curBitsForPlainBitMode > 0); 1746 1747 const int tritRange = curBitsForTritMode > 0 ? (3 << curBitsForTritMode) - 1 : -1; 1748 const int quintRange = curBitsForQuintMode > 0 ? (5 << curBitsForQuintMode) - 1 : -1; 1749 const int plainBitRange = curBitsForPlainBitMode > 0 ? (1 << curBitsForPlainBitMode) - 1 : -1; 1750 const int maxRange = de::max(de::max(tritRange, quintRange), plainBitRange); 1751 1752 if (maxRange == tritRange) 1753 { 1754 const ISEParams params(ISEMODE_TRIT, curBitsForTritMode); 1755 if (computeNumRequiredBits(params, numValuesInSequence) <= numAvailableBits) 1756 return ISEParams(ISEMODE_TRIT, curBitsForTritMode); 1757 curBitsForTritMode--; 1758 } 1759 else if (maxRange == quintRange) 1760 { 1761 const ISEParams params(ISEMODE_QUINT, curBitsForQuintMode); 1762 if (computeNumRequiredBits(params, numValuesInSequence) <= numAvailableBits) 1763 return ISEParams(ISEMODE_QUINT, curBitsForQuintMode); 1764 curBitsForQuintMode--; 1765 } 1766 else 1767 { 1768 const ISEParams params(ISEMODE_PLAIN_BIT, curBitsForPlainBitMode); 1769 DE_ASSERT(maxRange == plainBitRange); 1770 if (computeNumRequiredBits(params, numValuesInSequence) <= numAvailableBits) 1771 return ISEParams(ISEMODE_PLAIN_BIT, curBitsForPlainBitMode); 1772 curBitsForPlainBitMode--; 1773 } 1774 } 1775 } 1776 1777 static void unquantizeColorEndpoints (deUint32* dst, const ISEDecodedResult* iseResults, int numEndpoints, const ISEParams& iseParams) 1778 { 1779 if (iseParams.mode == ISEMODE_TRIT || iseParams.mode == ISEMODE_QUINT) 1780 { 1781 const int rangeCase = iseParams.numBits*2 - (iseParams.mode == ISEMODE_TRIT ? 2 : 1); 1782 DE_ASSERT(de::inRange(rangeCase, 0, 10)); 1783 static const deUint32 Ca[11] = { 204, 113, 93, 54, 44, 26, 22, 13, 11, 6, 5 }; 1784 const deUint32 C = Ca[rangeCase]; 1785 1786 for (int endpointNdx = 0; endpointNdx < numEndpoints; endpointNdx++) 1787 { 1788 const deUint32 a = getBit(iseResults[endpointNdx].m, 0); 1789 const deUint32 b = getBit(iseResults[endpointNdx].m, 1); 1790 const deUint32 c = getBit(iseResults[endpointNdx].m, 2); 1791 const deUint32 d = getBit(iseResults[endpointNdx].m, 3); 1792 const deUint32 e = getBit(iseResults[endpointNdx].m, 4); 1793 const deUint32 f = getBit(iseResults[endpointNdx].m, 5); 1794 1795 const deUint32 A = a == 0 ? 0 : (1<<9)-1; 1796 const deUint32 B = rangeCase == 0 ? 0 1797 : rangeCase == 1 ? 0 1798 : rangeCase == 2 ? (b << 8) | (b << 4) | (b << 2) | (b << 1) 1799 : rangeCase == 3 ? (b << 8) | (b << 3) | (b << 2) 1800 : rangeCase == 4 ? (c << 8) | (b << 7) | (c << 3) | (b << 2) | (c << 1) | (b << 0) 1801 : rangeCase == 5 ? (c << 8) | (b << 7) | (c << 2) | (b << 1) | (c << 0) 1802 : rangeCase == 6 ? (d << 8) | (c << 7) | (b << 6) | (d << 2) | (c << 1) | (b << 0) 1803 : rangeCase == 7 ? (d << 8) | (c << 7) | (b << 6) | (d << 1) | (c << 0) 1804 : rangeCase == 8 ? (e << 8) | (d << 7) | (c << 6) | (b << 5) | (e << 1) | (d << 0) 1805 : rangeCase == 9 ? (e << 8) | (d << 7) | (c << 6) | (b << 5) | (e << 0) 1806 : rangeCase == 10 ? (f << 8) | (e << 7) | (d << 6) | (c << 5) | (b << 4) | (f << 0) 1807 : (deUint32)-1; 1808 DE_ASSERT(B != (deUint32)-1); 1809 1810 dst[endpointNdx] = (((iseResults[endpointNdx].tq*C + B) ^ A) >> 2) | (A & 0x80); 1811 } 1812 } 1813 else 1814 { 1815 DE_ASSERT(iseParams.mode == ISEMODE_PLAIN_BIT); 1816 1817 for (int endpointNdx = 0; endpointNdx < numEndpoints; endpointNdx++) 1818 dst[endpointNdx] = bitReplicationScale(iseResults[endpointNdx].v, iseParams.numBits, 8); 1819 } 1820 } 1821 1822 static inline void bitTransferSigned (deInt32& a, deInt32& b) 1823 { 1824 b >>= 1; 1825 b |= a & 0x80; 1826 a >>= 1; 1827 a &= 0x3f; 1828 if (isBitSet(a, 5)) 1829 a -= 0x40; 1830 } 1831 1832 static inline UVec4 clampedRGBA (const tcu::IVec4& rgba) 1833 { 1834 return UVec4(de::clamp(rgba.x(), 0, 0xff), 1835 de::clamp(rgba.y(), 0, 0xff), 1836 de::clamp(rgba.z(), 0, 0xff), 1837 de::clamp(rgba.w(), 0, 0xff)); 1838 } 1839 1840 static inline tcu::IVec4 blueContract (int r, int g, int b, int a) 1841 { 1842 return tcu::IVec4((r+b)>>1, (g+b)>>1, b, a); 1843 } 1844 1845 static inline bool isColorEndpointModeHDR (deUint32 mode) 1846 { 1847 return mode == 2 || 1848 mode == 3 || 1849 mode == 7 || 1850 mode == 11 || 1851 mode == 14 || 1852 mode == 15; 1853 } 1854 1855 static void decodeHDREndpointMode7 (UVec4& e0, UVec4& e1, deUint32 v0, deUint32 v1, deUint32 v2, deUint32 v3) 1856 { 1857 const deUint32 m10 = getBit(v1, 7) | (getBit(v2, 7) << 1); 1858 const deUint32 m23 = getBits(v0, 6, 7); 1859 const deUint32 majComp = m10 != 3 ? m10 1860 : m23 != 3 ? m23 1861 : 0; 1862 const deUint32 mode = m10 != 3 ? m23 1863 : m23 != 3 ? 4 1864 : 5; 1865 1866 deInt32 red = (deInt32)getBits(v0, 0, 5); 1867 deInt32 green = (deInt32)getBits(v1, 0, 4); 1868 deInt32 blue = (deInt32)getBits(v2, 0, 4); 1869 deInt32 scale = (deInt32)getBits(v3, 0, 4); 1870 1871 { 1872 #define SHOR(DST_VAR, SHIFT, BIT_VAR) (DST_VAR) |= (BIT_VAR) << (SHIFT) 1873 #define ASSIGN_X_BITS(V0,S0, V1,S1, V2,S2, V3,S3, V4,S4, V5,S5, V6,S6) do { SHOR(V0,S0,x0); SHOR(V1,S1,x1); SHOR(V2,S2,x2); SHOR(V3,S3,x3); SHOR(V4,S4,x4); SHOR(V5,S5,x5); SHOR(V6,S6,x6); } while (false) 1874 1875 const deUint32 x0 = getBit(v1, 6); 1876 const deUint32 x1 = getBit(v1, 5); 1877 const deUint32 x2 = getBit(v2, 6); 1878 const deUint32 x3 = getBit(v2, 5); 1879 const deUint32 x4 = getBit(v3, 7); 1880 const deUint32 x5 = getBit(v3, 6); 1881 const deUint32 x6 = getBit(v3, 5); 1882 1883 deInt32& R = red; 1884 deInt32& G = green; 1885 deInt32& B = blue; 1886 deInt32& S = scale; 1887 1888 switch (mode) 1889 { 1890 case 0: ASSIGN_X_BITS(R,9, R,8, R,7, R,10, R,6, S,6, S,5); break; 1891 case 1: ASSIGN_X_BITS(R,8, G,5, R,7, B,5, R,6, R,10, R,9); break; 1892 case 2: ASSIGN_X_BITS(R,9, R,8, R,7, R,6, S,7, S,6, S,5); break; 1893 case 3: ASSIGN_X_BITS(R,8, G,5, R,7, B,5, R,6, S,6, S,5); break; 1894 case 4: ASSIGN_X_BITS(G,6, G,5, B,6, B,5, R,6, R,7, S,5); break; 1895 case 5: ASSIGN_X_BITS(G,6, G,5, B,6, B,5, R,6, S,6, S,5); break; 1896 default: 1897 DE_ASSERT(false); 1898 } 1899 1900 #undef ASSIGN_X_BITS 1901 #undef SHOR 1902 } 1903 1904 static const int shiftAmounts[] = { 1, 1, 2, 3, 4, 5 }; 1905 DE_ASSERT(mode < DE_LENGTH_OF_ARRAY(shiftAmounts)); 1906 1907 red <<= shiftAmounts[mode]; 1908 green <<= shiftAmounts[mode]; 1909 blue <<= shiftAmounts[mode]; 1910 scale <<= shiftAmounts[mode]; 1911 1912 if (mode != 5) 1913 { 1914 green = red - green; 1915 blue = red - blue; 1916 } 1917 1918 if (majComp == 1) 1919 std::swap(red, green); 1920 else if (majComp == 2) 1921 std::swap(red, blue); 1922 1923 e0 = UVec4(de::clamp(red - scale, 0, 0xfff), 1924 de::clamp(green - scale, 0, 0xfff), 1925 de::clamp(blue - scale, 0, 0xfff), 1926 0x780); 1927 1928 e1 = UVec4(de::clamp(red, 0, 0xfff), 1929 de::clamp(green, 0, 0xfff), 1930 de::clamp(blue, 0, 0xfff), 1931 0x780); 1932 } 1933 1934 static void decodeHDREndpointMode11 (UVec4& e0, UVec4& e1, deUint32 v0, deUint32 v1, deUint32 v2, deUint32 v3, deUint32 v4, deUint32 v5) 1935 { 1936 const deUint32 major = (getBit(v5, 7) << 1) | getBit(v4, 7); 1937 1938 if (major == 3) 1939 { 1940 e0 = UVec4(v0<<4, v2<<4, getBits(v4,0,6)<<5, 0x780); 1941 e1 = UVec4(v1<<4, v3<<4, getBits(v5,0,6)<<5, 0x780); 1942 } 1943 else 1944 { 1945 const deUint32 mode = (getBit(v3, 7) << 2) | (getBit(v2, 7) << 1) | getBit(v1, 7); 1946 1947 deInt32 a = (deInt32)((getBit(v1, 6) << 8) | v0); 1948 deInt32 c = (deInt32)(getBits(v1, 0, 5)); 1949 deInt32 b0 = (deInt32)(getBits(v2, 0, 5)); 1950 deInt32 b1 = (deInt32)(getBits(v3, 0, 5)); 1951 deInt32 d0 = (deInt32)(getBits(v4, 0, 4)); 1952 deInt32 d1 = (deInt32)(getBits(v5, 0, 4)); 1953 1954 { 1955 #define SHOR(DST_VAR, SHIFT, BIT_VAR) (DST_VAR) |= (BIT_VAR) << (SHIFT) 1956 #define ASSIGN_X_BITS(V0,S0, V1,S1, V2,S2, V3,S3, V4,S4, V5,S5) do { SHOR(V0,S0,x0); SHOR(V1,S1,x1); SHOR(V2,S2,x2); SHOR(V3,S3,x3); SHOR(V4,S4,x4); SHOR(V5,S5,x5); } while (false) 1957 1958 const deUint32 x0 = getBit(v2, 6); 1959 const deUint32 x1 = getBit(v3, 6); 1960 const deUint32 x2 = getBit(v4, 6); 1961 const deUint32 x3 = getBit(v5, 6); 1962 const deUint32 x4 = getBit(v4, 5); 1963 const deUint32 x5 = getBit(v5, 5); 1964 1965 switch (mode) 1966 { 1967 case 0: ASSIGN_X_BITS(b0,6, b1,6, d0,6, d1,6, d0,5, d1,5); break; 1968 case 1: ASSIGN_X_BITS(b0,6, b1,6, b0,7, b1,7, d0,5, d1,5); break; 1969 case 2: ASSIGN_X_BITS(a,9, c,6, d0,6, d1,6, d0,5, d1,5); break; 1970 case 3: ASSIGN_X_BITS(b0,6, b1,6, a,9, c,6, d0,5, d1,5); break; 1971 case 4: ASSIGN_X_BITS(b0,6, b1,6, b0,7, b1,7, a,9, a,10); break; 1972 case 5: ASSIGN_X_BITS(a,9, a,10, c,7, c,6, d0,5, d1,5); break; 1973 case 6: ASSIGN_X_BITS(b0,6, b1,6, a,11, c,6, a,9, a,10); break; 1974 case 7: ASSIGN_X_BITS(a,9, a,10, a,11, c,6, d0,5, d1,5); break; 1975 default: 1976 DE_ASSERT(false); 1977 } 1978 1979 #undef ASSIGN_X_BITS 1980 #undef SHOR 1981 } 1982 1983 static const int numDBits[] = { 7, 6, 7, 6, 5, 6, 5, 6 }; 1984 DE_ASSERT(mode < DE_LENGTH_OF_ARRAY(numDBits)); 1985 1986 d0 = signExtend(d0, numDBits[mode]); 1987 d1 = signExtend(d1, numDBits[mode]); 1988 1989 const int shiftAmount = (mode >> 1) ^ 3; 1990 a <<= shiftAmount; 1991 c <<= shiftAmount; 1992 b0 <<= shiftAmount; 1993 b1 <<= shiftAmount; 1994 d0 <<= shiftAmount; 1995 d1 <<= shiftAmount; 1996 1997 e0 = UVec4(de::clamp(a-c, 0, 0xfff), 1998 de::clamp(a-b0-c-d0, 0, 0xfff), 1999 de::clamp(a-b1-c-d1, 0, 0xfff), 2000 0x780); 2001 2002 e1 = UVec4(de::clamp(a, 0, 0xfff), 2003 de::clamp(a-b0, 0, 0xfff), 2004 de::clamp(a-b1, 0, 0xfff), 2005 0x780); 2006 2007 if (major == 1) 2008 { 2009 std::swap(e0.x(), e0.y()); 2010 std::swap(e1.x(), e1.y()); 2011 } 2012 else if (major == 2) 2013 { 2014 std::swap(e0.x(), e0.z()); 2015 std::swap(e1.x(), e1.z()); 2016 } 2017 } 2018 } 2019 2020 static void decodeHDREndpointMode15(UVec4& e0, UVec4& e1, deUint32 v0, deUint32 v1, deUint32 v2, deUint32 v3, deUint32 v4, deUint32 v5, deUint32 v6In, deUint32 v7In) 2021 { 2022 decodeHDREndpointMode11(e0, e1, v0, v1, v2, v3, v4, v5); 2023 2024 const deUint32 mode = (getBit(v7In, 7) << 1) | getBit(v6In, 7); 2025 deInt32 v6 = (deInt32)getBits(v6In, 0, 6); 2026 deInt32 v7 = (deInt32)getBits(v7In, 0, 6); 2027 2028 if (mode == 3) 2029 { 2030 e0.w() = v6 << 5; 2031 e1.w() = v7 << 5; 2032 } 2033 else 2034 { 2035 v6 |= (v7 << (mode+1)) & 0x780; 2036 v7 &= (0x3f >> mode); 2037 v7 ^= 0x20 >> mode; 2038 v7 -= 0x20 >> mode; 2039 v6 <<= 4-mode; 2040 v7 <<= 4-mode; 2041 2042 v7 += v6; 2043 v7 = de::clamp(v7, 0, 0xfff); 2044 e0.w() = v6; 2045 e1.w() = v7; 2046 } 2047 } 2048 2049 static void decodeColorEndpoints (ColorEndpointPair* dst, const deUint32* unquantizedEndpoints, const deUint32* endpointModes, int numPartitions) 2050 { 2051 int unquantizedNdx = 0; 2052 2053 for (int partitionNdx = 0; partitionNdx < numPartitions; partitionNdx++) 2054 { 2055 const deUint32 endpointMode = endpointModes[partitionNdx]; 2056 const deUint32* v = &unquantizedEndpoints[unquantizedNdx]; 2057 UVec4& e0 = dst[partitionNdx].e0; 2058 UVec4& e1 = dst[partitionNdx].e1; 2059 2060 unquantizedNdx += computeNumColorEndpointValues(endpointMode); 2061 2062 switch (endpointMode) 2063 { 2064 case 0: 2065 e0 = UVec4(v[0], v[0], v[0], 0xff); 2066 e1 = UVec4(v[1], v[1], v[1], 0xff); 2067 break; 2068 2069 case 1: 2070 { 2071 const deUint32 L0 = (v[0] >> 2) | (getBits(v[1], 6, 7) << 6); 2072 const deUint32 L1 = de::min(0xffu, L0 + getBits(v[1], 0, 5)); 2073 e0 = UVec4(L0, L0, L0, 0xff); 2074 e1 = UVec4(L1, L1, L1, 0xff); 2075 break; 2076 } 2077 2078 case 2: 2079 { 2080 const deUint32 v1Gr = v[1] >= v[0]; 2081 const deUint32 y0 = v1Gr ? v[0]<<4 : (v[1]<<4) + 8; 2082 const deUint32 y1 = v1Gr ? v[1]<<4 : (v[0]<<4) - 8; 2083 2084 e0 = UVec4(y0, y0, y0, 0x780); 2085 e1 = UVec4(y1, y1, y1, 0x780); 2086 break; 2087 } 2088 2089 case 3: 2090 { 2091 const bool m = isBitSet(v[0], 7); 2092 const deUint32 y0 = m ? (getBits(v[1], 5, 7) << 9) | (getBits(v[0], 0, 6) << 2) 2093 : (getBits(v[1], 4, 7) << 8) | (getBits(v[0], 0, 6) << 1); 2094 const deUint32 d = m ? getBits(v[1], 0, 4) << 2 2095 : getBits(v[1], 0, 3) << 1; 2096 const deUint32 y1 = de::min(0xfffu, y0+d); 2097 2098 e0 = UVec4(y0, y0, y0, 0x780); 2099 e1 = UVec4(y1, y1, y1, 0x780); 2100 break; 2101 } 2102 2103 case 4: 2104 e0 = UVec4(v[0], v[0], v[0], v[2]); 2105 e1 = UVec4(v[1], v[1], v[1], v[3]); 2106 break; 2107 2108 case 5: 2109 { 2110 deInt32 v0 = (deInt32)v[0]; 2111 deInt32 v1 = (deInt32)v[1]; 2112 deInt32 v2 = (deInt32)v[2]; 2113 deInt32 v3 = (deInt32)v[3]; 2114 bitTransferSigned(v1, v0); 2115 bitTransferSigned(v3, v2); 2116 2117 e0 = clampedRGBA(tcu::IVec4(v0, v0, v0, v2)); 2118 e1 = clampedRGBA(tcu::IVec4(v0+v1, v0+v1, v0+v1, v2+v3)); 2119 break; 2120 } 2121 2122 case 6: 2123 e0 = UVec4((v[0]*v[3]) >> 8, (v[1]*v[3]) >> 8, (v[2]*v[3]) >> 8, 0xff); 2124 e1 = UVec4(v[0], v[1], v[2], 0xff); 2125 break; 2126 2127 case 7: 2128 decodeHDREndpointMode7(e0, e1, v[0], v[1], v[2], v[3]); 2129 break; 2130 2131 case 8: 2132 if (v[1]+v[3]+v[5] >= v[0]+v[2]+v[4]) 2133 { 2134 e0 = UVec4(v[0], v[2], v[4], 0xff); 2135 e1 = UVec4(v[1], v[3], v[5], 0xff); 2136 } 2137 else 2138 { 2139 e0 = blueContract(v[1], v[3], v[5], 0xff).asUint(); 2140 e1 = blueContract(v[0], v[2], v[4], 0xff).asUint(); 2141 } 2142 break; 2143 2144 case 9: 2145 { 2146 deInt32 v0 = (deInt32)v[0]; 2147 deInt32 v1 = (deInt32)v[1]; 2148 deInt32 v2 = (deInt32)v[2]; 2149 deInt32 v3 = (deInt32)v[3]; 2150 deInt32 v4 = (deInt32)v[4]; 2151 deInt32 v5 = (deInt32)v[5]; 2152 bitTransferSigned(v1, v0); 2153 bitTransferSigned(v3, v2); 2154 bitTransferSigned(v5, v4); 2155 2156 if (v1+v3+v5 >= 0) 2157 { 2158 e0 = clampedRGBA(tcu::IVec4(v0, v2, v4, 0xff)); 2159 e1 = clampedRGBA(tcu::IVec4(v0+v1, v2+v3, v4+v5, 0xff)); 2160 } 2161 else 2162 { 2163 e0 = clampedRGBA(blueContract(v0+v1, v2+v3, v4+v5, 0xff)); 2164 e1 = clampedRGBA(blueContract(v0, v2, v4, 0xff)); 2165 } 2166 break; 2167 } 2168 2169 case 10: 2170 e0 = UVec4((v[0]*v[3]) >> 8, (v[1]*v[3]) >> 8, (v[2]*v[3]) >> 8, v[4]); 2171 e1 = UVec4(v[0], v[1], v[2], v[5]); 2172 break; 2173 2174 case 11: 2175 decodeHDREndpointMode11(e0, e1, v[0], v[1], v[2], v[3], v[4], v[5]); 2176 break; 2177 2178 case 12: 2179 if (v[1]+v[3]+v[5] >= v[0]+v[2]+v[4]) 2180 { 2181 e0 = UVec4(v[0], v[2], v[4], v[6]); 2182 e1 = UVec4(v[1], v[3], v[5], v[7]); 2183 } 2184 else 2185 { 2186 e0 = clampedRGBA(blueContract(v[1], v[3], v[5], v[7])); 2187 e1 = clampedRGBA(blueContract(v[0], v[2], v[4], v[6])); 2188 } 2189 break; 2190 2191 case 13: 2192 { 2193 deInt32 v0 = (deInt32)v[0]; 2194 deInt32 v1 = (deInt32)v[1]; 2195 deInt32 v2 = (deInt32)v[2]; 2196 deInt32 v3 = (deInt32)v[3]; 2197 deInt32 v4 = (deInt32)v[4]; 2198 deInt32 v5 = (deInt32)v[5]; 2199 deInt32 v6 = (deInt32)v[6]; 2200 deInt32 v7 = (deInt32)v[7]; 2201 bitTransferSigned(v1, v0); 2202 bitTransferSigned(v3, v2); 2203 bitTransferSigned(v5, v4); 2204 bitTransferSigned(v7, v6); 2205 2206 if (v1+v3+v5 >= 0) 2207 { 2208 e0 = clampedRGBA(tcu::IVec4(v0, v2, v4, v6)); 2209 e1 = clampedRGBA(tcu::IVec4(v0+v1, v2+v3, v4+v5, v6+v7)); 2210 } 2211 else 2212 { 2213 e0 = clampedRGBA(blueContract(v0+v1, v2+v3, v4+v5, v6+v7)); 2214 e1 = clampedRGBA(blueContract(v0, v2, v4, v6)); 2215 } 2216 2217 break; 2218 } 2219 2220 case 14: 2221 decodeHDREndpointMode11(e0, e1, v[0], v[1], v[2], v[3], v[4], v[5]); 2222 e0.w() = v[6]; 2223 e1.w() = v[7]; 2224 break; 2225 2226 case 15: 2227 decodeHDREndpointMode15(e0, e1, v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7]); 2228 break; 2229 2230 default: 2231 DE_ASSERT(false); 2232 } 2233 } 2234 } 2235 2236 static void computeColorEndpoints (ColorEndpointPair* dst, const Block128& blockData, const deUint32* endpointModes, int numPartitions, int numColorEndpointValues, const ISEParams& iseParams, int numBitsAvailable) 2237 { 2238 const int colorEndpointDataStart = numPartitions == 1 ? 17 : 29; 2239 ISEDecodedResult colorEndpointData[18]; 2240 2241 { 2242 BitAccessStream dataStream(blockData, colorEndpointDataStart, numBitsAvailable, true); 2243 decodeISE(&colorEndpointData[0], numColorEndpointValues, dataStream, iseParams); 2244 } 2245 2246 { 2247 deUint32 unquantizedEndpoints[18]; 2248 unquantizeColorEndpoints(&unquantizedEndpoints[0], &colorEndpointData[0], numColorEndpointValues, iseParams); 2249 decodeColorEndpoints(dst, &unquantizedEndpoints[0], &endpointModes[0], numPartitions); 2250 } 2251 } 2252 2253 static void unquantizeWeights (deUint32* dst, const ISEDecodedResult* weightGrid, const ASTCBlockMode& blockMode) 2254 { 2255 const int numWeights = computeNumWeights(blockMode); 2256 const ISEParams& iseParams = blockMode.weightISEParams; 2257 2258 if (iseParams.mode == ISEMODE_TRIT || iseParams.mode == ISEMODE_QUINT) 2259 { 2260 const int rangeCase = iseParams.numBits*2 + (iseParams.mode == ISEMODE_QUINT ? 1 : 0); 2261 2262 if (rangeCase == 0 || rangeCase == 1) 2263 { 2264 static const deUint32 map0[3] = { 0, 32, 63 }; 2265 static const deUint32 map1[5] = { 0, 16, 32, 47, 63 }; 2266 const deUint32* const map = rangeCase == 0 ? &map0[0] : &map1[0]; 2267 for (int i = 0; i < numWeights; i++) 2268 { 2269 DE_ASSERT(weightGrid[i].v < (rangeCase == 0 ? 3u : 5u)); 2270 dst[i] = map[weightGrid[i].v]; 2271 } 2272 } 2273 else 2274 { 2275 DE_ASSERT(rangeCase <= 6); 2276 static const deUint32 Ca[5] = { 50, 28, 23, 13, 11 }; 2277 const deUint32 C = Ca[rangeCase-2]; 2278 2279 for (int weightNdx = 0; weightNdx < numWeights; weightNdx++) 2280 { 2281 const deUint32 a = getBit(weightGrid[weightNdx].m, 0); 2282 const deUint32 b = getBit(weightGrid[weightNdx].m, 1); 2283 const deUint32 c = getBit(weightGrid[weightNdx].m, 2); 2284 2285 const deUint32 A = a == 0 ? 0 : (1<<7)-1; 2286 const deUint32 B = rangeCase == 2 ? 0 2287 : rangeCase == 3 ? 0 2288 : rangeCase == 4 ? (b << 6) | (b << 2) | (b << 0) 2289 : rangeCase == 5 ? (b << 6) | (b << 1) 2290 : rangeCase == 6 ? (c << 6) | (b << 5) | (c << 1) | (b << 0) 2291 : (deUint32)-1; 2292 2293 dst[weightNdx] = (((weightGrid[weightNdx].tq*C + B) ^ A) >> 2) | (A & 0x20); 2294 } 2295 } 2296 } 2297 else 2298 { 2299 DE_ASSERT(iseParams.mode == ISEMODE_PLAIN_BIT); 2300 2301 for (int weightNdx = 0; weightNdx < numWeights; weightNdx++) 2302 dst[weightNdx] = bitReplicationScale(weightGrid[weightNdx].v, iseParams.numBits, 6); 2303 } 2304 2305 for (int weightNdx = 0; weightNdx < numWeights; weightNdx++) 2306 dst[weightNdx] += dst[weightNdx] > 32 ? 1 : 0; 2307 } 2308 2309 static void interpolateWeights (TexelWeightPair* dst, const deUint32* unquantizedWeights, int blockWidth, int blockHeight, const ASTCBlockMode& blockMode) 2310 { 2311 const int numWeightsPerTexel = blockMode.isDualPlane ? 2 : 1; 2312 const deUint32 scaleX = (1024 + blockWidth/2) / (blockWidth-1); 2313 const deUint32 scaleY = (1024 + blockHeight/2) / (blockHeight-1); 2314 2315 for (int texelY = 0; texelY < blockHeight; texelY++) 2316 { 2317 for (int texelX = 0; texelX < blockWidth; texelX++) 2318 { 2319 const deUint32 gX = (scaleX*texelX*(blockMode.weightGridWidth-1) + 32) >> 6; 2320 const deUint32 gY = (scaleY*texelY*(blockMode.weightGridHeight-1) + 32) >> 6; 2321 const deUint32 jX = gX >> 4; 2322 const deUint32 jY = gY >> 4; 2323 const deUint32 fX = gX & 0xf; 2324 const deUint32 fY = gY & 0xf; 2325 const deUint32 w11 = (fX*fY + 8) >> 4; 2326 const deUint32 w10 = fY - w11; 2327 const deUint32 w01 = fX - w11; 2328 const deUint32 w00 = 16 - fX - fY + w11; 2329 const deUint32 v0 = jY*blockMode.weightGridWidth + jX; 2330 2331 for (int texelWeightNdx = 0; texelWeightNdx < numWeightsPerTexel; texelWeightNdx++) 2332 { 2333 const deUint32 p00 = unquantizedWeights[(v0) * numWeightsPerTexel + texelWeightNdx]; 2334 const deUint32 p01 = unquantizedWeights[(v0 + 1) * numWeightsPerTexel + texelWeightNdx]; 2335 const deUint32 p10 = unquantizedWeights[(v0 + blockMode.weightGridWidth) * numWeightsPerTexel + texelWeightNdx]; 2336 const deUint32 p11 = unquantizedWeights[(v0 + blockMode.weightGridWidth + 1) * numWeightsPerTexel + texelWeightNdx]; 2337 2338 dst[texelY*blockWidth + texelX].w[texelWeightNdx] = (p00*w00 + p01*w01 + p10*w10 + p11*w11 + 8) >> 4; 2339 } 2340 } 2341 } 2342 } 2343 2344 static void computeTexelWeights (TexelWeightPair* dst, const Block128& blockData, int blockWidth, int blockHeight, const ASTCBlockMode& blockMode) 2345 { 2346 ISEDecodedResult weightGrid[64]; 2347 2348 { 2349 BitAccessStream dataStream(blockData, 127, computeNumRequiredBits(blockMode.weightISEParams, computeNumWeights(blockMode)), false); 2350 decodeISE(&weightGrid[0], computeNumWeights(blockMode), dataStream, blockMode.weightISEParams); 2351 } 2352 2353 { 2354 deUint32 unquantizedWeights[64]; 2355 unquantizeWeights(&unquantizedWeights[0], &weightGrid[0], blockMode); 2356 interpolateWeights(dst, &unquantizedWeights[0], blockWidth, blockHeight, blockMode); 2357 } 2358 } 2359 2360 static inline deUint32 hash52 (deUint32 v) 2361 { 2362 deUint32 p = v; 2363 p ^= p >> 15; p -= p << 17; p += p << 7; p += p << 4; 2364 p ^= p >> 5; p += p << 16; p ^= p >> 7; p ^= p >> 3; 2365 p ^= p << 6; p ^= p >> 17; 2366 return p; 2367 } 2368 2369 static int computeTexelPartition (deUint32 seedIn, deUint32 xIn, deUint32 yIn, deUint32 zIn, int numPartitions, bool smallBlock) 2370 { 2371 DE_ASSERT(zIn == 0); 2372 const deUint32 x = smallBlock ? xIn << 1 : xIn; 2373 const deUint32 y = smallBlock ? yIn << 1 : yIn; 2374 const deUint32 z = smallBlock ? zIn << 1 : zIn; 2375 const deUint32 seed = seedIn + 1024*(numPartitions-1); 2376 const deUint32 rnum = hash52(seed); 2377 deUint8 seed1 = rnum & 0xf; 2378 deUint8 seed2 = (rnum >> 4) & 0xf; 2379 deUint8 seed3 = (rnum >> 8) & 0xf; 2380 deUint8 seed4 = (rnum >> 12) & 0xf; 2381 deUint8 seed5 = (rnum >> 16) & 0xf; 2382 deUint8 seed6 = (rnum >> 20) & 0xf; 2383 deUint8 seed7 = (rnum >> 24) & 0xf; 2384 deUint8 seed8 = (rnum >> 28) & 0xf; 2385 deUint8 seed9 = (rnum >> 18) & 0xf; 2386 deUint8 seed10 = (rnum >> 22) & 0xf; 2387 deUint8 seed11 = (rnum >> 26) & 0xf; 2388 deUint8 seed12 = ((rnum >> 30) | (rnum << 2)) & 0xf; 2389 2390 seed1 *= seed1; seed5 *= seed5; seed9 *= seed9; 2391 seed2 *= seed2; seed6 *= seed6; seed10 *= seed10; 2392 seed3 *= seed3; seed7 *= seed7; seed11 *= seed11; 2393 seed4 *= seed4; seed8 *= seed8; seed12 *= seed12; 2394 2395 const int shA = (seed & 2) != 0 ? 4 : 5; 2396 const int shB = numPartitions == 3 ? 6 : 5; 2397 const int sh1 = (seed & 1) != 0 ? shA : shB; 2398 const int sh2 = (seed & 1) != 0 ? shB : shA; 2399 const int sh3 = (seed & 0x10) != 0 ? sh1 : sh2; 2400 2401 seed1 >>= sh1; seed2 >>= sh2; seed3 >>= sh1; seed4 >>= sh2; 2402 seed5 >>= sh1; seed6 >>= sh2; seed7 >>= sh1; seed8 >>= sh2; 2403 seed9 >>= sh3; seed10 >>= sh3; seed11 >>= sh3; seed12 >>= sh3; 2404 2405 const int a = 0x3f & (seed1*x + seed2*y + seed11*z + (rnum >> 14)); 2406 const int b = 0x3f & (seed3*x + seed4*y + seed12*z + (rnum >> 10)); 2407 const int c = numPartitions >= 3 ? 0x3f & (seed5*x + seed6*y + seed9*z + (rnum >> 6)) : 0; 2408 const int d = numPartitions >= 4 ? 0x3f & (seed7*x + seed8*y + seed10*z + (rnum >> 2)) : 0; 2409 2410 return a >= b && a >= c && a >= d ? 0 2411 : b >= c && b >= d ? 1 2412 : c >= d ? 2 2413 : 3; 2414 } 2415 2416 static void setTexelColors (void* dst, ColorEndpointPair* colorEndpoints, TexelWeightPair* texelWeights, int ccs, deUint32 partitionIndexSeed, 2417 int numPartitions, int blockWidth, int blockHeight, bool isSRGB, bool isLDRMode, const deUint32* colorEndpointModes) 2418 { 2419 const bool smallBlock = blockWidth*blockHeight < 31; 2420 bool isHDREndpoint[4]; 2421 2422 for (int i = 0; i < numPartitions; i++) 2423 isHDREndpoint[i] = isColorEndpointModeHDR(colorEndpointModes[i]); 2424 2425 for (int texelY = 0; texelY < blockHeight; texelY++) 2426 for (int texelX = 0; texelX < blockWidth; texelX++) 2427 { 2428 const int texelNdx = texelY*blockWidth + texelX; 2429 const int colorEndpointNdx = numPartitions == 1 ? 0 : computeTexelPartition(partitionIndexSeed, texelX, texelY, 0, numPartitions, smallBlock); 2430 DE_ASSERT(colorEndpointNdx < numPartitions); 2431 const UVec4& e0 = colorEndpoints[colorEndpointNdx].e0; 2432 const UVec4& e1 = colorEndpoints[colorEndpointNdx].e1; 2433 const TexelWeightPair& weight = texelWeights[texelNdx]; 2434 2435 if (isLDRMode && isHDREndpoint[colorEndpointNdx]) 2436 { 2437 if (isSRGB) 2438 { 2439 ((deUint8*)dst)[texelNdx*4 + 0] = 0xff; 2440 ((deUint8*)dst)[texelNdx*4 + 1] = 0; 2441 ((deUint8*)dst)[texelNdx*4 + 2] = 0xff; 2442 ((deUint8*)dst)[texelNdx*4 + 3] = 0xff; 2443 } 2444 else 2445 { 2446 ((float*)dst)[texelNdx*4 + 0] = 1.0f; 2447 ((float*)dst)[texelNdx*4 + 1] = 0; 2448 ((float*)dst)[texelNdx*4 + 2] = 1.0f; 2449 ((float*)dst)[texelNdx*4 + 3] = 1.0f; 2450 } 2451 } 2452 else 2453 { 2454 for (int channelNdx = 0; channelNdx < 4; channelNdx++) 2455 { 2456 if (!isHDREndpoint[colorEndpointNdx] || (channelNdx == 3 && colorEndpointModes[colorEndpointNdx] == 14)) // \note Alpha for mode 14 is treated the same as LDR. 2457 { 2458 const deUint32 c0 = (e0[channelNdx] << 8) | (isSRGB ? 0x80 : e0[channelNdx]); 2459 const deUint32 c1 = (e1[channelNdx] << 8) | (isSRGB ? 0x80 : e1[channelNdx]); 2460 const deUint32 w = weight.w[ccs == channelNdx ? 1 : 0]; 2461 const deUint32 c = (c0*(64-w) + c1*w + 32) / 64; 2462 2463 if (isSRGB) 2464 ((deUint8*)dst)[texelNdx*4 + channelNdx] = (c & 0xff00) >> 8; 2465 else 2466 ((float*)dst)[texelNdx*4 + channelNdx] = c == 65535 ? 1.0f : (float)c / 65536.0f; 2467 } 2468 else 2469 { 2470 DE_STATIC_ASSERT((isSameType<deFloat16, deUint16>::V)); 2471 const deUint32 c0 = e0[channelNdx] << 4; 2472 const deUint32 c1 = e1[channelNdx] << 4; 2473 const deUint32 w = weight.w[ccs == channelNdx ? 1 : 0]; 2474 const deUint32 c = (c0*(64-w) + c1*w + 32) / 64; 2475 const deUint32 e = getBits(c, 11, 15); 2476 const deUint32 m = getBits(c, 0, 10); 2477 const deUint32 mt = m < 512 ? 3*m 2478 : m >= 1536 ? 5*m - 2048 2479 : 4*m - 512; 2480 const deFloat16 cf = (e << 10) + (mt >> 3); 2481 2482 ((float*)dst)[texelNdx*4 + channelNdx] = deFloat16To32(isFloat16InfOrNan(cf) ? 0x7bff : cf); 2483 } 2484 } 2485 } 2486 } 2487 } 2488 2489 static void decompressASTCBlock (void* dst, const Block128& blockData, int blockWidth, int blockHeight, bool isSRGB, bool isLDR) 2490 { 2491 DE_ASSERT(isLDR || !isSRGB); 2492 2493 // Decode block mode. 2494 2495 const ASTCBlockMode blockMode = getASTCBlockMode(blockData.getBits(0, 10)); 2496 2497 // Check for block mode errors. 2498 2499 if (blockMode.isError) 2500 { 2501 setASTCErrorColorBlock(dst, blockWidth, blockHeight, isSRGB); 2502 return; 2503 } 2504 2505 // Separate path for void-extent. 2506 2507 if (blockMode.isVoidExtent) 2508 { 2509 decodeVoidExtentBlock(dst, blockData, blockWidth, blockHeight, isSRGB, isLDR); 2510 return; 2511 } 2512 2513 // Compute weight grid values. 2514 2515 const int numWeights = computeNumWeights(blockMode); 2516 const int numWeightDataBits = computeNumRequiredBits(blockMode.weightISEParams, numWeights); 2517 const int numPartitions = (int)blockData.getBits(11, 12) + 1; 2518 2519 // Check for errors in weight grid, partition and dual-plane parameters. 2520 2521 if (numWeights > 64 || 2522 numWeightDataBits > 96 || 2523 numWeightDataBits < 24 || 2524 blockMode.weightGridWidth > blockWidth || 2525 blockMode.weightGridHeight > blockHeight || 2526 (numPartitions == 4 && blockMode.isDualPlane)) 2527 { 2528 setASTCErrorColorBlock(dst, blockWidth, blockHeight, isSRGB); 2529 return; 2530 } 2531 2532 // Compute number of bits available for color endpoint data. 2533 2534 const bool isSingleUniqueCem = numPartitions == 1 || blockData.getBits(23, 24) == 0; 2535 const int numConfigDataBits = (numPartitions == 1 ? 17 : isSingleUniqueCem ? 29 : 25 + 3*numPartitions) + 2536 (blockMode.isDualPlane ? 2 : 0); 2537 const int numBitsForColorEndpoints = 128 - numWeightDataBits - numConfigDataBits; 2538 const int extraCemBitsStart = 127 - numWeightDataBits - (isSingleUniqueCem ? -1 2539 : numPartitions == 4 ? 7 2540 : numPartitions == 3 ? 4 2541 : numPartitions == 2 ? 1 2542 : 0); 2543 // Decode color endpoint modes. 2544 2545 deUint32 colorEndpointModes[4]; 2546 decodeColorEndpointModes(&colorEndpointModes[0], blockData, numPartitions, extraCemBitsStart); 2547 2548 const int numColorEndpointValues = computeNumColorEndpointValues(colorEndpointModes, numPartitions); 2549 2550 // Check for errors in color endpoint value count. 2551 2552 if (numColorEndpointValues > 18 || numBitsForColorEndpoints < divRoundUp(13*numColorEndpointValues, 5)) 2553 { 2554 setASTCErrorColorBlock(dst, blockWidth, blockHeight, isSRGB); 2555 return; 2556 } 2557 2558 // Compute color endpoints. 2559 2560 ColorEndpointPair colorEndpoints[4]; 2561 computeColorEndpoints(&colorEndpoints[0], blockData, &colorEndpointModes[0], numPartitions, numColorEndpointValues, 2562 computeMaximumRangeISEParams(numBitsForColorEndpoints, numColorEndpointValues), numBitsForColorEndpoints); 2563 2564 // Compute texel weights. 2565 2566 TexelWeightPair texelWeights[ASTC_MAX_BLOCK_WIDTH*ASTC_MAX_BLOCK_HEIGHT]; 2567 computeTexelWeights(&texelWeights[0], blockData, blockWidth, blockHeight, blockMode); 2568 2569 // Set texel colors. 2570 2571 const int ccs = blockMode.isDualPlane ? (int)blockData.getBits(extraCemBitsStart-2, extraCemBitsStart-1) : -1; 2572 const deUint32 partitionIndexSeed = numPartitions > 1 ? blockData.getBits(13, 22) : (deUint32)-1; 2573 2574 setTexelColors(dst, &colorEndpoints[0], &texelWeights[0], ccs, partitionIndexSeed, numPartitions, blockWidth, blockHeight, isSRGB, isLDR, &colorEndpointModes[0]); 2575 } 2576 2577 } // ASTCDecompressInternal 2578 2579 static void decompressASTC (const tcu::PixelBufferAccess& dst, int width, int height, const deUint8* data, int blockWidth, int blockHeight, bool isSRGB, bool isLDR) 2580 { 2581 using namespace ASTCDecompressInternal; 2582 2583 DE_ASSERT(isLDR || !isSRGB); 2584 2585 const int numBlocksX = divRoundUp(width, blockWidth); 2586 const int numBlocksY = divRoundUp(height, blockHeight); 2587 union 2588 { 2589 deUint8 sRGB[ASTC_MAX_BLOCK_WIDTH*ASTC_MAX_BLOCK_HEIGHT*4]; 2590 float linear[ASTC_MAX_BLOCK_WIDTH*ASTC_MAX_BLOCK_HEIGHT*4]; 2591 } decompressedBuffer; 2592 2593 for (int blockY = 0; blockY < numBlocksY; blockY++) 2594 for (int blockX = 0; blockX < numBlocksX; blockX++) 2595 { 2596 const int baseX = blockX * blockWidth; 2597 const int baseY = blockY * blockHeight; 2598 2599 const Block128 blockData(&data[(blockY*numBlocksX + blockX) * ASTC_BLOCK_SIZE_BYTES]); 2600 decompressASTCBlock(isSRGB ? (void*)&decompressedBuffer.sRGB[0] : (void*)&decompressedBuffer.linear[0], 2601 blockData, blockWidth, blockHeight, isSRGB, isLDR); 2602 2603 if (isSRGB) 2604 { 2605 for (int i = 0; i < blockHeight; i++) 2606 for (int j = 0; j < blockWidth; j++) 2607 { 2608 if (baseX + j < dst.getWidth() && baseY + i < dst.getHeight()) 2609 dst.setPixel(tcu::IVec4(decompressedBuffer.sRGB[(i*blockWidth + j) * 4 + 0], 2610 decompressedBuffer.sRGB[(i*blockWidth + j) * 4 + 1], 2611 decompressedBuffer.sRGB[(i*blockWidth + j) * 4 + 2], 2612 decompressedBuffer.sRGB[(i*blockWidth + j) * 4 + 3]), 2613 baseX + j, 2614 baseY + i); 2615 } 2616 } 2617 else 2618 { 2619 for (int i = 0; i < blockHeight; i++) 2620 for (int j = 0; j < blockWidth; j++) 2621 { 2622 if (baseX + j < dst.getWidth() && baseY + i < dst.getHeight()) 2623 { 2624 dst.setPixel(tcu::Vec4(decompressedBuffer.linear[(i*blockWidth + j) * 4 + 0], 2625 decompressedBuffer.linear[(i*blockWidth + j) * 4 + 1], 2626 decompressedBuffer.linear[(i*blockWidth + j) * 4 + 2], 2627 decompressedBuffer.linear[(i*blockWidth + j) * 4 + 3]), 2628 baseX + j, 2629 baseY + i); 2630 } 2631 } 2632 } 2633 } 2634 } 2635 2636 /*--------------------------------------------------------------------*//*! 2637 * \brief Decode to uncompressed pixel data 2638 * \param dst Destination buffer 2639 *//*--------------------------------------------------------------------*/ 2640 void CompressedTexture::decompress (const tcu::PixelBufferAccess& dst, const DecompressionParams& params) const 2641 { 2642 DE_ASSERT(dst.getWidth() == m_width && dst.getHeight() == m_height && dst.getDepth() == 1); 2643 DE_ASSERT(dst.getFormat() == getUncompressedFormat()); 2644 2645 if (isEtcFormat(m_format)) 2646 { 2647 switch (m_format) 2648 { 2649 case ETC1_RGB8: decompressETC1 (dst, m_width, m_height, &m_data[0]); break; 2650 case EAC_R11: decompressEAC_R11 (dst, m_width, m_height, &m_data[0], false); break; 2651 case EAC_SIGNED_R11: decompressEAC_R11 (dst, m_width, m_height, &m_data[0], true); break; 2652 case EAC_RG11: decompressEAC_RG11 (dst, m_width, m_height, &m_data[0], false); break; 2653 case EAC_SIGNED_RG11: decompressEAC_RG11 (dst, m_width, m_height, &m_data[0], true); break; 2654 case ETC2_RGB8: decompressETC2 (dst, m_width, m_height, &m_data[0]); break; 2655 case ETC2_SRGB8: decompressETC2 (dst, m_width, m_height, &m_data[0]); break; 2656 case ETC2_RGB8_PUNCHTHROUGH_ALPHA1: decompressETC2_RGB8_PUNCHTHROUGH_ALPHA1 (dst, m_width, m_height, &m_data[0]); break; 2657 case ETC2_SRGB8_PUNCHTHROUGH_ALPHA1: decompressETC2_RGB8_PUNCHTHROUGH_ALPHA1 (dst, m_width, m_height, &m_data[0]); break; 2658 case ETC2_EAC_RGBA8: decompressETC2_EAC_RGBA8 (dst, m_width, m_height, &m_data[0]); break; 2659 case ETC2_EAC_SRGB8_ALPHA8: decompressETC2_EAC_RGBA8 (dst, m_width, m_height, &m_data[0]); break; 2660 2661 default: 2662 DE_ASSERT(false); 2663 break; 2664 } 2665 } 2666 else if (isASTCFormat(m_format)) 2667 { 2668 const tcu::IVec3 blockSize = getASTCBlockSize(m_format); 2669 const bool isSRGBFormat = isASTCSRGBFormat(m_format); 2670 2671 if (blockSize.z() > 1) 2672 throw tcu::InternalError("3D ASTC textures not currently supported"); 2673 2674 decompressASTC(dst, m_width, m_height, &m_data[0], blockSize.x(), blockSize.y(), isSRGBFormat, isSRGBFormat || params.isASTCModeLDR); 2675 } 2676 else 2677 DE_ASSERT(false); 2678 } 2679 2680 } // tcu 2681
