1 // Copyright 2015 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #include "JBig2_GrrdProc.h" 8 9 #include <memory> 10 11 #include "JBig2_ArithDecoder.h" 12 #include "JBig2_BitStream.h" 13 #include "JBig2_Image.h" 14 15 CJBig2_Image* CJBig2_GRRDProc::decode(CJBig2_ArithDecoder* pArithDecoder, 16 JBig2ArithCtx* grContext) { 17 if (GRW == 0 || GRH == 0) 18 return new CJBig2_Image(GRW, GRH); 19 20 if (GRTEMPLATE == 0) { 21 if ((GRAT[0] == -1) && (GRAT[1] == -1) && (GRAT[2] == -1) && 22 (GRAT[3] == -1) && (GRREFERENCEDX == 0) && 23 (GRW == (FX_DWORD)GRREFERENCE->m_nWidth)) { 24 return decode_Template0_opt(pArithDecoder, grContext); 25 } 26 return decode_Template0_unopt(pArithDecoder, grContext); 27 } 28 29 if ((GRREFERENCEDX == 0) && (GRW == (FX_DWORD)GRREFERENCE->m_nWidth)) 30 return decode_Template1_opt(pArithDecoder, grContext); 31 return decode_Template1_unopt(pArithDecoder, grContext); 32 } 33 34 CJBig2_Image* CJBig2_GRRDProc::decode_Template0_unopt( 35 CJBig2_ArithDecoder* pArithDecoder, 36 JBig2ArithCtx* grContext) { 37 FX_BOOL LTP, SLTP, bVal; 38 FX_DWORD CONTEXT; 39 FX_DWORD line1, line2, line3, line4, line5; 40 LTP = 0; 41 std::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH)); 42 GRREG->fill(0); 43 for (FX_DWORD h = 0; h < GRH; h++) { 44 if (TPGRON) { 45 SLTP = pArithDecoder->DECODE(&grContext[0x0010]); 46 LTP = LTP ^ SLTP; 47 } 48 if (LTP == 0) { 49 line1 = GRREG->getPixel(1, h - 1); 50 line1 |= GRREG->getPixel(0, h - 1) << 1; 51 line2 = 0; 52 line3 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY - 1); 53 line3 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1) 54 << 1; 55 line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY); 56 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1; 57 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY) 58 << 2; 59 line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1); 60 line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1) 61 << 1; 62 line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY + 1) 63 << 2; 64 for (FX_DWORD w = 0; w < GRW; w++) { 65 CONTEXT = line5; 66 CONTEXT |= line4 << 3; 67 CONTEXT |= line3 << 6; 68 CONTEXT |= GRREFERENCE->getPixel(w - GRREFERENCEDX + GRAT[2], 69 h - GRREFERENCEDY + GRAT[3]) 70 << 8; 71 CONTEXT |= line2 << 9; 72 CONTEXT |= line1 << 10; 73 CONTEXT |= GRREG->getPixel(w + GRAT[0], h + GRAT[1]) << 12; 74 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); 75 GRREG->setPixel(w, h, bVal); 76 line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x03; 77 line2 = ((line2 << 1) | bVal) & 0x01; 78 line3 = ((line3 << 1) | 79 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, 80 h - GRREFERENCEDY - 1)) & 81 0x03; 82 line4 = 83 ((line4 << 1) | 84 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) & 85 0x07; 86 line5 = ((line5 << 1) | 87 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, 88 h - GRREFERENCEDY + 1)) & 89 0x07; 90 } 91 } else { 92 line1 = GRREG->getPixel(1, h - 1); 93 line1 |= GRREG->getPixel(0, h - 1) << 1; 94 line2 = 0; 95 line3 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY - 1); 96 line3 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1) 97 << 1; 98 line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY); 99 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1; 100 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY) 101 << 2; 102 line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1); 103 line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1) 104 << 1; 105 line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY + 1) 106 << 2; 107 for (FX_DWORD w = 0; w < GRW; w++) { 108 bVal = GRREFERENCE->getPixel(w, h); 109 if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w - 1, h - 1)) && 110 (bVal == GRREFERENCE->getPixel(w, h - 1)) && 111 (bVal == GRREFERENCE->getPixel(w + 1, h - 1)) && 112 (bVal == GRREFERENCE->getPixel(w - 1, h)) && 113 (bVal == GRREFERENCE->getPixel(w + 1, h)) && 114 (bVal == GRREFERENCE->getPixel(w - 1, h + 1)) && 115 (bVal == GRREFERENCE->getPixel(w, h + 1)) && 116 (bVal == GRREFERENCE->getPixel(w + 1, h + 1)))) { 117 CONTEXT = line5; 118 CONTEXT |= line4 << 3; 119 CONTEXT |= line3 << 6; 120 CONTEXT |= GRREFERENCE->getPixel(w - GRREFERENCEDX + GRAT[2], 121 h - GRREFERENCEDY + GRAT[3]) 122 << 8; 123 CONTEXT |= line2 << 9; 124 CONTEXT |= line1 << 10; 125 CONTEXT |= GRREG->getPixel(w + GRAT[0], h + GRAT[1]) << 12; 126 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); 127 } 128 GRREG->setPixel(w, h, bVal); 129 line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x03; 130 line2 = ((line2 << 1) | bVal) & 0x01; 131 line3 = ((line3 << 1) | 132 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, 133 h - GRREFERENCEDY - 1)) & 134 0x03; 135 line4 = 136 ((line4 << 1) | 137 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) & 138 0x07; 139 line5 = ((line5 << 1) | 140 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, 141 h - GRREFERENCEDY + 1)) & 142 0x07; 143 } 144 } 145 } 146 return GRREG.release(); 147 } 148 149 CJBig2_Image* CJBig2_GRRDProc::decode_Template0_opt( 150 CJBig2_ArithDecoder* pArithDecoder, 151 JBig2ArithCtx* grContext) { 152 if (!GRREFERENCE->m_pData) 153 return nullptr; 154 155 FX_BOOL LTP, SLTP, bVal; 156 FX_DWORD CONTEXT; 157 FX_DWORD line1, line1_r, line2_r, line3_r; 158 uint8_t* pLine, *pLineR, cVal; 159 intptr_t nStride, nStrideR, nOffset; 160 int32_t k, nBits; 161 int32_t GRWR, GRHR; 162 int32_t GRW, GRH; 163 GRW = (int32_t)CJBig2_GRRDProc::GRW; 164 GRH = (int32_t)CJBig2_GRRDProc::GRH; 165 LTP = 0; 166 std::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH)); 167 if (!GRREG->m_pData) 168 return nullptr; 169 170 pLine = GRREG->m_pData; 171 pLineR = GRREFERENCE->m_pData; 172 nStride = GRREG->m_nStride; 173 nStrideR = GRREFERENCE->m_nStride; 174 GRWR = (int32_t)GRREFERENCE->m_nWidth; 175 GRHR = (int32_t)GRREFERENCE->m_nHeight; 176 if (GRREFERENCEDY < -GRHR + 1 || GRREFERENCEDY > GRHR - 1) { 177 GRREFERENCEDY = 0; 178 } 179 nOffset = -GRREFERENCEDY * nStrideR; 180 for (int32_t h = 0; h < GRH; h++) { 181 if (TPGRON) { 182 SLTP = pArithDecoder->DECODE(&grContext[0x0010]); 183 LTP = LTP ^ SLTP; 184 } 185 line1 = (h > 0) ? pLine[-nStride] << 4 : 0; 186 int32_t reference_h = h - GRREFERENCEDY; 187 FX_BOOL line1_r_ok = (reference_h > 0 && reference_h < GRHR + 1); 188 FX_BOOL line2_r_ok = (reference_h > -1 && reference_h < GRHR); 189 FX_BOOL line3_r_ok = (reference_h > -2 && reference_h < GRHR - 1); 190 line1_r = line1_r_ok ? pLineR[nOffset - nStrideR] : 0; 191 line2_r = line2_r_ok ? pLineR[nOffset] : 0; 192 line3_r = line3_r_ok ? pLineR[nOffset + nStrideR] : 0; 193 if (LTP == 0) { 194 CONTEXT = (line1 & 0x1c00) | (line1_r & 0x01c0) | 195 ((line2_r >> 3) & 0x0038) | ((line3_r >> 6) & 0x0007); 196 for (int32_t w = 0; w < GRW; w += 8) { 197 nBits = GRW - w > 8 ? 8 : GRW - w; 198 if (h > 0) 199 line1 = (line1 << 8) | 200 (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 4 : 0); 201 if (h > GRHR + GRREFERENCEDY + 1) { 202 line1_r = 0; 203 line2_r = 0; 204 line3_r = 0; 205 } else { 206 if (line1_r_ok) 207 line1_r = 208 (line1_r << 8) | 209 (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0); 210 if (line2_r_ok) 211 line2_r = (line2_r << 8) | 212 (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0); 213 if (line3_r_ok) { 214 line3_r = 215 (line3_r << 8) | 216 (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0); 217 } else { 218 line3_r = 0; 219 } 220 } 221 cVal = 0; 222 for (k = 0; k < nBits; k++) { 223 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); 224 cVal |= bVal << (7 - k); 225 CONTEXT = ((CONTEXT & 0x0cdb) << 1) | (bVal << 9) | 226 ((line1 >> (7 - k)) & 0x0400) | 227 ((line1_r >> (7 - k)) & 0x0040) | 228 ((line2_r >> (10 - k)) & 0x0008) | 229 ((line3_r >> (13 - k)) & 0x0001); 230 } 231 pLine[w >> 3] = cVal; 232 } 233 } else { 234 CONTEXT = (line1 & 0x1c00) | (line1_r & 0x01c0) | 235 ((line2_r >> 3) & 0x0038) | ((line3_r >> 6) & 0x0007); 236 for (int32_t w = 0; w < GRW; w += 8) { 237 nBits = GRW - w > 8 ? 8 : GRW - w; 238 if (h > 0) 239 line1 = (line1 << 8) | 240 (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 4 : 0); 241 if (line1_r_ok) 242 line1_r = 243 (line1_r << 8) | 244 (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0); 245 if (line2_r_ok) 246 line2_r = (line2_r << 8) | 247 (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0); 248 if (line3_r_ok) { 249 line3_r = 250 (line3_r << 8) | 251 (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0); 252 } else { 253 line3_r = 0; 254 } 255 cVal = 0; 256 for (k = 0; k < nBits; k++) { 257 bVal = GRREFERENCE->getPixel(w + k, h); 258 if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w + k - 1, h - 1)) && 259 (bVal == GRREFERENCE->getPixel(w + k, h - 1)) && 260 (bVal == GRREFERENCE->getPixel(w + k + 1, h - 1)) && 261 (bVal == GRREFERENCE->getPixel(w + k - 1, h)) && 262 (bVal == GRREFERENCE->getPixel(w + k + 1, h)) && 263 (bVal == GRREFERENCE->getPixel(w + k - 1, h + 1)) && 264 (bVal == GRREFERENCE->getPixel(w + k, h + 1)) && 265 (bVal == GRREFERENCE->getPixel(w + k + 1, h + 1)))) { 266 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); 267 } 268 cVal |= bVal << (7 - k); 269 CONTEXT = ((CONTEXT & 0x0cdb) << 1) | (bVal << 9) | 270 ((line1 >> (7 - k)) & 0x0400) | 271 ((line1_r >> (7 - k)) & 0x0040) | 272 ((line2_r >> (10 - k)) & 0x0008) | 273 ((line3_r >> (13 - k)) & 0x0001); 274 } 275 pLine[w >> 3] = cVal; 276 } 277 } 278 pLine += nStride; 279 if (h < GRHR + GRREFERENCEDY) { 280 pLineR += nStrideR; 281 } 282 } 283 return GRREG.release(); 284 } 285 286 CJBig2_Image* CJBig2_GRRDProc::decode_Template1_unopt( 287 CJBig2_ArithDecoder* pArithDecoder, 288 JBig2ArithCtx* grContext) { 289 FX_BOOL LTP, SLTP, bVal; 290 FX_DWORD CONTEXT; 291 FX_DWORD line1, line2, line3, line4, line5; 292 LTP = 0; 293 std::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH)); 294 GRREG->fill(0); 295 for (FX_DWORD h = 0; h < GRH; h++) { 296 if (TPGRON) { 297 SLTP = pArithDecoder->DECODE(&grContext[0x0008]); 298 LTP = LTP ^ SLTP; 299 } 300 if (LTP == 0) { 301 line1 = GRREG->getPixel(1, h - 1); 302 line1 |= GRREG->getPixel(0, h - 1) << 1; 303 line1 |= GRREG->getPixel(-1, h - 1) << 2; 304 line2 = 0; 305 line3 = GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1); 306 line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY); 307 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1; 308 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY) 309 << 2; 310 line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1); 311 line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1) 312 << 1; 313 for (FX_DWORD w = 0; w < GRW; w++) { 314 CONTEXT = line5; 315 CONTEXT |= line4 << 2; 316 CONTEXT |= line3 << 5; 317 CONTEXT |= line2 << 6; 318 CONTEXT |= line1 << 7; 319 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); 320 GRREG->setPixel(w, h, bVal); 321 line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x07; 322 line2 = ((line2 << 1) | bVal) & 0x01; 323 line3 = ((line3 << 1) | 324 GRREFERENCE->getPixel(w - GRREFERENCEDX + 1, 325 h - GRREFERENCEDY - 1)) & 326 0x01; 327 line4 = 328 ((line4 << 1) | 329 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) & 330 0x07; 331 line5 = ((line5 << 1) | 332 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, 333 h - GRREFERENCEDY + 1)) & 334 0x03; 335 } 336 } else { 337 line1 = GRREG->getPixel(1, h - 1); 338 line1 |= GRREG->getPixel(0, h - 1) << 1; 339 line1 |= GRREG->getPixel(-1, h - 1) << 2; 340 line2 = 0; 341 line3 = GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1); 342 line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY); 343 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1; 344 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY) 345 << 2; 346 line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1); 347 line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1) 348 << 1; 349 for (FX_DWORD w = 0; w < GRW; w++) { 350 bVal = GRREFERENCE->getPixel(w, h); 351 if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w - 1, h - 1)) && 352 (bVal == GRREFERENCE->getPixel(w, h - 1)) && 353 (bVal == GRREFERENCE->getPixel(w + 1, h - 1)) && 354 (bVal == GRREFERENCE->getPixel(w - 1, h)) && 355 (bVal == GRREFERENCE->getPixel(w + 1, h)) && 356 (bVal == GRREFERENCE->getPixel(w - 1, h + 1)) && 357 (bVal == GRREFERENCE->getPixel(w, h + 1)) && 358 (bVal == GRREFERENCE->getPixel(w + 1, h + 1)))) { 359 CONTEXT = line5; 360 CONTEXT |= line4 << 2; 361 CONTEXT |= line3 << 5; 362 CONTEXT |= line2 << 6; 363 CONTEXT |= line1 << 7; 364 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); 365 } 366 GRREG->setPixel(w, h, bVal); 367 line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x07; 368 line2 = ((line2 << 1) | bVal) & 0x01; 369 line3 = ((line3 << 1) | 370 GRREFERENCE->getPixel(w - GRREFERENCEDX + 1, 371 h - GRREFERENCEDY - 1)) & 372 0x01; 373 line4 = 374 ((line4 << 1) | 375 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) & 376 0x07; 377 line5 = ((line5 << 1) | 378 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, 379 h - GRREFERENCEDY + 1)) & 380 0x03; 381 } 382 } 383 } 384 return GRREG.release(); 385 } 386 387 CJBig2_Image* CJBig2_GRRDProc::decode_Template1_opt( 388 CJBig2_ArithDecoder* pArithDecoder, 389 JBig2ArithCtx* grContext) { 390 if (!GRREFERENCE->m_pData) 391 return nullptr; 392 393 FX_BOOL LTP, SLTP, bVal; 394 FX_DWORD CONTEXT; 395 FX_DWORD line1, line1_r, line2_r, line3_r; 396 uint8_t* pLine, *pLineR, cVal; 397 intptr_t nStride, nStrideR, nOffset; 398 int32_t k, nBits; 399 int32_t GRWR, GRHR; 400 int32_t GRW, GRH; 401 GRW = (int32_t)CJBig2_GRRDProc::GRW; 402 GRH = (int32_t)CJBig2_GRRDProc::GRH; 403 LTP = 0; 404 std::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH)); 405 if (!GRREG->m_pData) 406 return nullptr; 407 408 pLine = GRREG->m_pData; 409 pLineR = GRREFERENCE->m_pData; 410 nStride = GRREG->m_nStride; 411 nStrideR = GRREFERENCE->m_nStride; 412 GRWR = (int32_t)GRREFERENCE->m_nWidth; 413 GRHR = (int32_t)GRREFERENCE->m_nHeight; 414 if (GRREFERENCEDY < -GRHR + 1 || GRREFERENCEDY > GRHR - 1) { 415 GRREFERENCEDY = 0; 416 } 417 nOffset = -GRREFERENCEDY * nStrideR; 418 for (int32_t h = 0; h < GRH; h++) { 419 if (TPGRON) { 420 SLTP = pArithDecoder->DECODE(&grContext[0x0008]); 421 LTP = LTP ^ SLTP; 422 } 423 line1 = (h > 0) ? pLine[-nStride] << 1 : 0; 424 int32_t reference_h = h - GRREFERENCEDY; 425 FX_BOOL line1_r_ok = (reference_h > 0 && reference_h < GRHR + 1); 426 FX_BOOL line2_r_ok = (reference_h > -1 && reference_h < GRHR); 427 FX_BOOL line3_r_ok = (reference_h > -2 && reference_h < GRHR - 1); 428 line1_r = line1_r_ok ? pLineR[nOffset - nStrideR] : 0; 429 line2_r = line2_r_ok ? pLineR[nOffset] : 0; 430 line3_r = line3_r_ok ? pLineR[nOffset + nStrideR] : 0; 431 if (LTP == 0) { 432 CONTEXT = (line1 & 0x0380) | ((line1_r >> 2) & 0x0020) | 433 ((line2_r >> 4) & 0x001c) | ((line3_r >> 6) & 0x0003); 434 for (int32_t w = 0; w < GRW; w += 8) { 435 nBits = GRW - w > 8 ? 8 : GRW - w; 436 if (h > 0) 437 line1 = (line1 << 8) | 438 (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 1 : 0); 439 if (line1_r_ok) 440 line1_r = 441 (line1_r << 8) | 442 (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0); 443 if (line2_r_ok) 444 line2_r = (line2_r << 8) | 445 (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0); 446 if (line3_r_ok) { 447 line3_r = 448 (line3_r << 8) | 449 (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0); 450 } else { 451 line3_r = 0; 452 } 453 cVal = 0; 454 for (k = 0; k < nBits; k++) { 455 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); 456 cVal |= bVal << (7 - k); 457 CONTEXT = ((CONTEXT & 0x018d) << 1) | (bVal << 6) | 458 ((line1 >> (7 - k)) & 0x0080) | 459 ((line1_r >> (9 - k)) & 0x0020) | 460 ((line2_r >> (11 - k)) & 0x0004) | 461 ((line3_r >> (13 - k)) & 0x0001); 462 } 463 pLine[w >> 3] = cVal; 464 } 465 } else { 466 CONTEXT = (line1 & 0x0380) | ((line1_r >> 2) & 0x0020) | 467 ((line2_r >> 4) & 0x001c) | ((line3_r >> 6) & 0x0003); 468 for (int32_t w = 0; w < GRW; w += 8) { 469 nBits = GRW - w > 8 ? 8 : GRW - w; 470 if (h > 0) 471 line1 = (line1 << 8) | 472 (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 1 : 0); 473 if (line1_r_ok) 474 line1_r = 475 (line1_r << 8) | 476 (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0); 477 if (line2_r_ok) 478 line2_r = (line2_r << 8) | 479 (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0); 480 if (line3_r_ok) { 481 line3_r = 482 (line3_r << 8) | 483 (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0); 484 } else { 485 line3_r = 0; 486 } 487 cVal = 0; 488 for (k = 0; k < nBits; k++) { 489 bVal = GRREFERENCE->getPixel(w + k, h); 490 if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w + k - 1, h - 1)) && 491 (bVal == GRREFERENCE->getPixel(w + k, h - 1)) && 492 (bVal == GRREFERENCE->getPixel(w + k + 1, h - 1)) && 493 (bVal == GRREFERENCE->getPixel(w + k - 1, h)) && 494 (bVal == GRREFERENCE->getPixel(w + k + 1, h)) && 495 (bVal == GRREFERENCE->getPixel(w + k - 1, h + 1)) && 496 (bVal == GRREFERENCE->getPixel(w + k, h + 1)) && 497 (bVal == GRREFERENCE->getPixel(w + k + 1, h + 1)))) { 498 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); 499 } 500 cVal |= bVal << (7 - k); 501 CONTEXT = ((CONTEXT & 0x018d) << 1) | (bVal << 6) | 502 ((line1 >> (7 - k)) & 0x0080) | 503 ((line1_r >> (9 - k)) & 0x0020) | 504 ((line2_r >> (11 - k)) & 0x0004) | 505 ((line3_r >> (13 - k)) & 0x0001); 506 } 507 pLine[w >> 3] = cVal; 508 } 509 } 510 pLine += nStride; 511 if (h < GRHR + GRREFERENCEDY) { 512 pLineR += nStrideR; 513 } 514 } 515 return GRREG.release(); 516 } 517
