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| 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 "../../../../third_party/base/nonstd_unique_ptr.h" |
| 10 #include "JBig2_ArithDecoder.h" |
| 11 #include "JBig2_BitStream.h" |
| 12 #include "JBig2_Image.h" |
| 13 |
| 14 CJBig2_Image* CJBig2_GRRDProc::decode(CJBig2_ArithDecoder* pArithDecoder, |
| 15 JBig2ArithCtx* grContext) { |
| 16 if (GRW == 0 || GRH == 0) |
| 17 return new CJBig2_Image(GRW, GRH); |
| 18 |
| 19 if (GRTEMPLATE == 0) { |
| 20 if ((GRAT[0] == -1) && (GRAT[1] == -1) && (GRAT[2] == -1) && |
| 21 (GRAT[3] == -1) && (GRREFERENCEDX == 0) && |
| 22 (GRW == (FX_DWORD)GRREFERENCE->m_nWidth)) { |
| 23 return decode_Template0_opt(pArithDecoder, grContext); |
| 24 } |
| 25 return decode_Template0_unopt(pArithDecoder, grContext); |
| 26 } |
| 27 |
| 28 if ((GRREFERENCEDX == 0) && (GRW == (FX_DWORD)GRREFERENCE->m_nWidth)) |
| 29 return decode_Template1_opt(pArithDecoder, grContext); |
| 30 return decode_Template1_unopt(pArithDecoder, grContext); |
| 31 } |
| 32 |
| 33 CJBig2_Image* CJBig2_GRRDProc::decode_Template0_unopt( |
| 34 CJBig2_ArithDecoder* pArithDecoder, |
| 35 JBig2ArithCtx* grContext) { |
| 36 FX_BOOL LTP, SLTP, bVal; |
| 37 FX_DWORD CONTEXT; |
| 38 FX_DWORD line1, line2, line3, line4, line5; |
| 39 LTP = 0; |
| 40 nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH)); |
| 41 GRREG->fill(0); |
| 42 for (FX_DWORD h = 0; h < GRH; h++) { |
| 43 if (TPGRON) { |
| 44 SLTP = pArithDecoder->DECODE(&grContext[0x0010]); |
| 45 LTP = LTP ^ SLTP; |
| 46 } |
| 47 if (LTP == 0) { |
| 48 line1 = GRREG->getPixel(1, h - 1); |
| 49 line1 |= GRREG->getPixel(0, h - 1) << 1; |
| 50 line2 = 0; |
| 51 line3 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY - 1); |
| 52 line3 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1) |
| 53 << 1; |
| 54 line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY); |
| 55 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1; |
| 56 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY) |
| 57 << 2; |
| 58 line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1); |
| 59 line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1) |
| 60 << 1; |
| 61 line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY + 1) |
| 62 << 2; |
| 63 for (FX_DWORD w = 0; w < GRW; w++) { |
| 64 CONTEXT = line5; |
| 65 CONTEXT |= line4 << 3; |
| 66 CONTEXT |= line3 << 6; |
| 67 CONTEXT |= GRREFERENCE->getPixel(w - GRREFERENCEDX + GRAT[2], |
| 68 h - GRREFERENCEDY + GRAT[3]) |
| 69 << 8; |
| 70 CONTEXT |= line2 << 9; |
| 71 CONTEXT |= line1 << 10; |
| 72 CONTEXT |= GRREG->getPixel(w + GRAT[0], h + GRAT[1]) << 12; |
| 73 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); |
| 74 GRREG->setPixel(w, h, bVal); |
| 75 line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x03; |
| 76 line2 = ((line2 << 1) | bVal) & 0x01; |
| 77 line3 = ((line3 << 1) | |
| 78 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, |
| 79 h - GRREFERENCEDY - 1)) & |
| 80 0x03; |
| 81 line4 = |
| 82 ((line4 << 1) | |
| 83 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) & |
| 84 0x07; |
| 85 line5 = ((line5 << 1) | |
| 86 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, |
| 87 h - GRREFERENCEDY + 1)) & |
| 88 0x07; |
| 89 } |
| 90 } else { |
| 91 line1 = GRREG->getPixel(1, h - 1); |
| 92 line1 |= GRREG->getPixel(0, h - 1) << 1; |
| 93 line2 = 0; |
| 94 line3 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY - 1); |
| 95 line3 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1) |
| 96 << 1; |
| 97 line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY); |
| 98 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1; |
| 99 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY) |
| 100 << 2; |
| 101 line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1); |
| 102 line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1) |
| 103 << 1; |
| 104 line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY + 1) |
| 105 << 2; |
| 106 for (FX_DWORD w = 0; w < GRW; w++) { |
| 107 bVal = GRREFERENCE->getPixel(w, h); |
| 108 if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w - 1, h - 1)) && |
| 109 (bVal == GRREFERENCE->getPixel(w, h - 1)) && |
| 110 (bVal == GRREFERENCE->getPixel(w + 1, h - 1)) && |
| 111 (bVal == GRREFERENCE->getPixel(w - 1, h)) && |
| 112 (bVal == GRREFERENCE->getPixel(w + 1, h)) && |
| 113 (bVal == GRREFERENCE->getPixel(w - 1, h + 1)) && |
| 114 (bVal == GRREFERENCE->getPixel(w, h + 1)) && |
| 115 (bVal == GRREFERENCE->getPixel(w + 1, h + 1)))) { |
| 116 CONTEXT = line5; |
| 117 CONTEXT |= line4 << 3; |
| 118 CONTEXT |= line3 << 6; |
| 119 CONTEXT |= GRREFERENCE->getPixel(w - GRREFERENCEDX + GRAT[2], |
| 120 h - GRREFERENCEDY + GRAT[3]) |
| 121 << 8; |
| 122 CONTEXT |= line2 << 9; |
| 123 CONTEXT |= line1 << 10; |
| 124 CONTEXT |= GRREG->getPixel(w + GRAT[0], h + GRAT[1]) << 12; |
| 125 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); |
| 126 } |
| 127 GRREG->setPixel(w, h, bVal); |
| 128 line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x03; |
| 129 line2 = ((line2 << 1) | bVal) & 0x01; |
| 130 line3 = ((line3 << 1) | |
| 131 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, |
| 132 h - GRREFERENCEDY - 1)) & |
| 133 0x03; |
| 134 line4 = |
| 135 ((line4 << 1) | |
| 136 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) & |
| 137 0x07; |
| 138 line5 = ((line5 << 1) | |
| 139 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, |
| 140 h - GRREFERENCEDY + 1)) & |
| 141 0x07; |
| 142 } |
| 143 } |
| 144 } |
| 145 return GRREG.release(); |
| 146 } |
| 147 |
| 148 CJBig2_Image* CJBig2_GRRDProc::decode_Template0_opt( |
| 149 CJBig2_ArithDecoder* pArithDecoder, |
| 150 JBig2ArithCtx* grContext) { |
| 151 if (!GRREFERENCE->m_pData) |
| 152 return nullptr; |
| 153 |
| 154 FX_BOOL LTP, SLTP, bVal; |
| 155 FX_DWORD CONTEXT; |
| 156 FX_DWORD line1, line1_r, line2_r, line3_r; |
| 157 uint8_t* pLine, *pLineR, cVal; |
| 158 intptr_t nStride, nStrideR, nOffset; |
| 159 int32_t k, nBits; |
| 160 int32_t GRWR, GRHR; |
| 161 int32_t GRW, GRH; |
| 162 GRW = (int32_t)CJBig2_GRRDProc::GRW; |
| 163 GRH = (int32_t)CJBig2_GRRDProc::GRH; |
| 164 LTP = 0; |
| 165 nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH)); |
| 166 if (!GRREG->m_pData) |
| 167 return nullptr; |
| 168 |
| 169 pLine = GRREG->m_pData; |
| 170 pLineR = GRREFERENCE->m_pData; |
| 171 nStride = GRREG->m_nStride; |
| 172 nStrideR = GRREFERENCE->m_nStride; |
| 173 GRWR = (int32_t)GRREFERENCE->m_nWidth; |
| 174 GRHR = (int32_t)GRREFERENCE->m_nHeight; |
| 175 if (GRREFERENCEDY < -GRHR + 1 || GRREFERENCEDY > GRHR - 1) { |
| 176 GRREFERENCEDY = 0; |
| 177 } |
| 178 nOffset = -GRREFERENCEDY * nStrideR; |
| 179 for (int32_t h = 0; h < GRH; h++) { |
| 180 if (TPGRON) { |
| 181 SLTP = pArithDecoder->DECODE(&grContext[0x0010]); |
| 182 LTP = LTP ^ SLTP; |
| 183 } |
| 184 line1 = (h > 0) ? pLine[-nStride] << 4 : 0; |
| 185 int32_t reference_h = h - GRREFERENCEDY; |
| 186 FX_BOOL line1_r_ok = (reference_h > 0 && reference_h < GRHR + 1); |
| 187 FX_BOOL line2_r_ok = (reference_h > -1 && reference_h < GRHR); |
| 188 FX_BOOL line3_r_ok = (reference_h > -2 && reference_h < GRHR - 1); |
| 189 line1_r = line1_r_ok ? pLineR[nOffset - nStrideR] : 0; |
| 190 line2_r = line2_r_ok ? pLineR[nOffset] : 0; |
| 191 line3_r = line3_r_ok ? pLineR[nOffset + nStrideR] : 0; |
| 192 if (LTP == 0) { |
| 193 CONTEXT = (line1 & 0x1c00) | (line1_r & 0x01c0) | |
| 194 ((line2_r >> 3) & 0x0038) | ((line3_r >> 6) & 0x0007); |
| 195 for (int32_t w = 0; w < GRW; w += 8) { |
| 196 nBits = GRW - w > 8 ? 8 : GRW - w; |
| 197 if (h > 0) |
| 198 line1 = (line1 << 8) | |
| 199 (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 4 : 0); |
| 200 if (h > GRHR + GRREFERENCEDY + 1) { |
| 201 line1_r = 0; |
| 202 line2_r = 0; |
| 203 line3_r = 0; |
| 204 } else { |
| 205 if (line1_r_ok) |
| 206 line1_r = |
| 207 (line1_r << 8) | |
| 208 (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0); |
| 209 if (line2_r_ok) |
| 210 line2_r = (line2_r << 8) | |
| 211 (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0); |
| 212 if (line3_r_ok) { |
| 213 line3_r = |
| 214 (line3_r << 8) | |
| 215 (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0); |
| 216 } else { |
| 217 line3_r = 0; |
| 218 } |
| 219 } |
| 220 cVal = 0; |
| 221 for (k = 0; k < nBits; k++) { |
| 222 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); |
| 223 cVal |= bVal << (7 - k); |
| 224 CONTEXT = ((CONTEXT & 0x0cdb) << 1) | (bVal << 9) | |
| 225 ((line1 >> (7 - k)) & 0x0400) | |
| 226 ((line1_r >> (7 - k)) & 0x0040) | |
| 227 ((line2_r >> (10 - k)) & 0x0008) | |
| 228 ((line3_r >> (13 - k)) & 0x0001); |
| 229 } |
| 230 pLine[w >> 3] = cVal; |
| 231 } |
| 232 } else { |
| 233 CONTEXT = (line1 & 0x1c00) | (line1_r & 0x01c0) | |
| 234 ((line2_r >> 3) & 0x0038) | ((line3_r >> 6) & 0x0007); |
| 235 for (int32_t w = 0; w < GRW; w += 8) { |
| 236 nBits = GRW - w > 8 ? 8 : GRW - w; |
| 237 if (h > 0) |
| 238 line1 = (line1 << 8) | |
| 239 (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 4 : 0); |
| 240 if (line1_r_ok) |
| 241 line1_r = |
| 242 (line1_r << 8) | |
| 243 (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0); |
| 244 if (line2_r_ok) |
| 245 line2_r = (line2_r << 8) | |
| 246 (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0); |
| 247 if (line3_r_ok) { |
| 248 line3_r = |
| 249 (line3_r << 8) | |
| 250 (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0); |
| 251 } else { |
| 252 line3_r = 0; |
| 253 } |
| 254 cVal = 0; |
| 255 for (k = 0; k < nBits; k++) { |
| 256 bVal = GRREFERENCE->getPixel(w + k, h); |
| 257 if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w + k - 1, h - 1)) && |
| 258 (bVal == GRREFERENCE->getPixel(w + k, h - 1)) && |
| 259 (bVal == GRREFERENCE->getPixel(w + k + 1, h - 1)) && |
| 260 (bVal == GRREFERENCE->getPixel(w + k - 1, h)) && |
| 261 (bVal == GRREFERENCE->getPixel(w + k + 1, h)) && |
| 262 (bVal == GRREFERENCE->getPixel(w + k - 1, h + 1)) && |
| 263 (bVal == GRREFERENCE->getPixel(w + k, h + 1)) && |
| 264 (bVal == GRREFERENCE->getPixel(w + k + 1, h + 1)))) { |
| 265 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); |
| 266 } |
| 267 cVal |= bVal << (7 - k); |
| 268 CONTEXT = ((CONTEXT & 0x0cdb) << 1) | (bVal << 9) | |
| 269 ((line1 >> (7 - k)) & 0x0400) | |
| 270 ((line1_r >> (7 - k)) & 0x0040) | |
| 271 ((line2_r >> (10 - k)) & 0x0008) | |
| 272 ((line3_r >> (13 - k)) & 0x0001); |
| 273 } |
| 274 pLine[w >> 3] = cVal; |
| 275 } |
| 276 } |
| 277 pLine += nStride; |
| 278 if (h < GRHR + GRREFERENCEDY) { |
| 279 pLineR += nStrideR; |
| 280 } |
| 281 } |
| 282 return GRREG.release(); |
| 283 } |
| 284 |
| 285 CJBig2_Image* CJBig2_GRRDProc::decode_Template1_unopt( |
| 286 CJBig2_ArithDecoder* pArithDecoder, |
| 287 JBig2ArithCtx* grContext) { |
| 288 FX_BOOL LTP, SLTP, bVal; |
| 289 FX_DWORD CONTEXT; |
| 290 FX_DWORD line1, line2, line3, line4, line5; |
| 291 LTP = 0; |
| 292 nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH)); |
| 293 GRREG->fill(0); |
| 294 for (FX_DWORD h = 0; h < GRH; h++) { |
| 295 if (TPGRON) { |
| 296 SLTP = pArithDecoder->DECODE(&grContext[0x0008]); |
| 297 LTP = LTP ^ SLTP; |
| 298 } |
| 299 if (LTP == 0) { |
| 300 line1 = GRREG->getPixel(1, h - 1); |
| 301 line1 |= GRREG->getPixel(0, h - 1) << 1; |
| 302 line1 |= GRREG->getPixel(-1, h - 1) << 2; |
| 303 line2 = 0; |
| 304 line3 = GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1); |
| 305 line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY); |
| 306 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1; |
| 307 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY) |
| 308 << 2; |
| 309 line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1); |
| 310 line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1) |
| 311 << 1; |
| 312 for (FX_DWORD w = 0; w < GRW; w++) { |
| 313 CONTEXT = line5; |
| 314 CONTEXT |= line4 << 2; |
| 315 CONTEXT |= line3 << 5; |
| 316 CONTEXT |= line2 << 6; |
| 317 CONTEXT |= line1 << 7; |
| 318 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); |
| 319 GRREG->setPixel(w, h, bVal); |
| 320 line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x07; |
| 321 line2 = ((line2 << 1) | bVal) & 0x01; |
| 322 line3 = ((line3 << 1) | |
| 323 GRREFERENCE->getPixel(w - GRREFERENCEDX + 1, |
| 324 h - GRREFERENCEDY - 1)) & |
| 325 0x01; |
| 326 line4 = |
| 327 ((line4 << 1) | |
| 328 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) & |
| 329 0x07; |
| 330 line5 = ((line5 << 1) | |
| 331 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, |
| 332 h - GRREFERENCEDY + 1)) & |
| 333 0x03; |
| 334 } |
| 335 } else { |
| 336 line1 = GRREG->getPixel(1, h - 1); |
| 337 line1 |= GRREG->getPixel(0, h - 1) << 1; |
| 338 line1 |= GRREG->getPixel(-1, h - 1) << 2; |
| 339 line2 = 0; |
| 340 line3 = GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1); |
| 341 line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY); |
| 342 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1; |
| 343 line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY) |
| 344 << 2; |
| 345 line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1); |
| 346 line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1) |
| 347 << 1; |
| 348 for (FX_DWORD w = 0; w < GRW; w++) { |
| 349 bVal = GRREFERENCE->getPixel(w, h); |
| 350 if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w - 1, h - 1)) && |
| 351 (bVal == GRREFERENCE->getPixel(w, h - 1)) && |
| 352 (bVal == GRREFERENCE->getPixel(w + 1, h - 1)) && |
| 353 (bVal == GRREFERENCE->getPixel(w - 1, h)) && |
| 354 (bVal == GRREFERENCE->getPixel(w + 1, h)) && |
| 355 (bVal == GRREFERENCE->getPixel(w - 1, h + 1)) && |
| 356 (bVal == GRREFERENCE->getPixel(w, h + 1)) && |
| 357 (bVal == GRREFERENCE->getPixel(w + 1, h + 1)))) { |
| 358 CONTEXT = line5; |
| 359 CONTEXT |= line4 << 2; |
| 360 CONTEXT |= line3 << 5; |
| 361 CONTEXT |= line2 << 6; |
| 362 CONTEXT |= line1 << 7; |
| 363 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); |
| 364 } |
| 365 GRREG->setPixel(w, h, bVal); |
| 366 line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x07; |
| 367 line2 = ((line2 << 1) | bVal) & 0x01; |
| 368 line3 = ((line3 << 1) | |
| 369 GRREFERENCE->getPixel(w - GRREFERENCEDX + 1, |
| 370 h - GRREFERENCEDY - 1)) & |
| 371 0x01; |
| 372 line4 = |
| 373 ((line4 << 1) | |
| 374 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) & |
| 375 0x07; |
| 376 line5 = ((line5 << 1) | |
| 377 GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, |
| 378 h - GRREFERENCEDY + 1)) & |
| 379 0x03; |
| 380 } |
| 381 } |
| 382 } |
| 383 return GRREG.release(); |
| 384 } |
| 385 |
| 386 CJBig2_Image* CJBig2_GRRDProc::decode_Template1_opt( |
| 387 CJBig2_ArithDecoder* pArithDecoder, |
| 388 JBig2ArithCtx* grContext) { |
| 389 if (!GRREFERENCE->m_pData) |
| 390 return nullptr; |
| 391 |
| 392 FX_BOOL LTP, SLTP, bVal; |
| 393 FX_DWORD CONTEXT; |
| 394 FX_DWORD line1, line1_r, line2_r, line3_r; |
| 395 uint8_t* pLine, *pLineR, cVal; |
| 396 intptr_t nStride, nStrideR, nOffset; |
| 397 int32_t k, nBits; |
| 398 int32_t GRWR, GRHR; |
| 399 int32_t GRW, GRH; |
| 400 GRW = (int32_t)CJBig2_GRRDProc::GRW; |
| 401 GRH = (int32_t)CJBig2_GRRDProc::GRH; |
| 402 LTP = 0; |
| 403 nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH)); |
| 404 if (!GRREG->m_pData) |
| 405 return nullptr; |
| 406 |
| 407 pLine = GRREG->m_pData; |
| 408 pLineR = GRREFERENCE->m_pData; |
| 409 nStride = GRREG->m_nStride; |
| 410 nStrideR = GRREFERENCE->m_nStride; |
| 411 GRWR = (int32_t)GRREFERENCE->m_nWidth; |
| 412 GRHR = (int32_t)GRREFERENCE->m_nHeight; |
| 413 if (GRREFERENCEDY < -GRHR + 1 || GRREFERENCEDY > GRHR - 1) { |
| 414 GRREFERENCEDY = 0; |
| 415 } |
| 416 nOffset = -GRREFERENCEDY * nStrideR; |
| 417 for (int32_t h = 0; h < GRH; h++) { |
| 418 if (TPGRON) { |
| 419 SLTP = pArithDecoder->DECODE(&grContext[0x0008]); |
| 420 LTP = LTP ^ SLTP; |
| 421 } |
| 422 line1 = (h > 0) ? pLine[-nStride] << 1 : 0; |
| 423 int32_t reference_h = h - GRREFERENCEDY; |
| 424 FX_BOOL line1_r_ok = (reference_h > 0 && reference_h < GRHR + 1); |
| 425 FX_BOOL line2_r_ok = (reference_h > -1 && reference_h < GRHR); |
| 426 FX_BOOL line3_r_ok = (reference_h > -2 && reference_h < GRHR - 1); |
| 427 line1_r = line1_r_ok ? pLineR[nOffset - nStrideR] : 0; |
| 428 line2_r = line2_r_ok ? pLineR[nOffset] : 0; |
| 429 line3_r = line3_r_ok ? pLineR[nOffset + nStrideR] : 0; |
| 430 if (LTP == 0) { |
| 431 CONTEXT = (line1 & 0x0380) | ((line1_r >> 2) & 0x0020) | |
| 432 ((line2_r >> 4) & 0x001c) | ((line3_r >> 6) & 0x0003); |
| 433 for (int32_t w = 0; w < GRW; w += 8) { |
| 434 nBits = GRW - w > 8 ? 8 : GRW - w; |
| 435 if (h > 0) |
| 436 line1 = (line1 << 8) | |
| 437 (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 1 : 0); |
| 438 if (line1_r_ok) |
| 439 line1_r = |
| 440 (line1_r << 8) | |
| 441 (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0); |
| 442 if (line2_r_ok) |
| 443 line2_r = (line2_r << 8) | |
| 444 (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0); |
| 445 if (line3_r_ok) { |
| 446 line3_r = |
| 447 (line3_r << 8) | |
| 448 (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0); |
| 449 } else { |
| 450 line3_r = 0; |
| 451 } |
| 452 cVal = 0; |
| 453 for (k = 0; k < nBits; k++) { |
| 454 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); |
| 455 cVal |= bVal << (7 - k); |
| 456 CONTEXT = ((CONTEXT & 0x018d) << 1) | (bVal << 6) | |
| 457 ((line1 >> (7 - k)) & 0x0080) | |
| 458 ((line1_r >> (9 - k)) & 0x0020) | |
| 459 ((line2_r >> (11 - k)) & 0x0004) | |
| 460 ((line3_r >> (13 - k)) & 0x0001); |
| 461 } |
| 462 pLine[w >> 3] = cVal; |
| 463 } |
| 464 } else { |
| 465 CONTEXT = (line1 & 0x0380) | ((line1_r >> 2) & 0x0020) | |
| 466 ((line2_r >> 4) & 0x001c) | ((line3_r >> 6) & 0x0003); |
| 467 for (int32_t w = 0; w < GRW; w += 8) { |
| 468 nBits = GRW - w > 8 ? 8 : GRW - w; |
| 469 if (h > 0) |
| 470 line1 = (line1 << 8) | |
| 471 (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 1 : 0); |
| 472 if (line1_r_ok) |
| 473 line1_r = |
| 474 (line1_r << 8) | |
| 475 (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0); |
| 476 if (line2_r_ok) |
| 477 line2_r = (line2_r << 8) | |
| 478 (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0); |
| 479 if (line3_r_ok) { |
| 480 line3_r = |
| 481 (line3_r << 8) | |
| 482 (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0); |
| 483 } else { |
| 484 line3_r = 0; |
| 485 } |
| 486 cVal = 0; |
| 487 for (k = 0; k < nBits; k++) { |
| 488 bVal = GRREFERENCE->getPixel(w + k, h); |
| 489 if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w + k - 1, h - 1)) && |
| 490 (bVal == GRREFERENCE->getPixel(w + k, h - 1)) && |
| 491 (bVal == GRREFERENCE->getPixel(w + k + 1, h - 1)) && |
| 492 (bVal == GRREFERENCE->getPixel(w + k - 1, h)) && |
| 493 (bVal == GRREFERENCE->getPixel(w + k + 1, h)) && |
| 494 (bVal == GRREFERENCE->getPixel(w + k - 1, h + 1)) && |
| 495 (bVal == GRREFERENCE->getPixel(w + k, h + 1)) && |
| 496 (bVal == GRREFERENCE->getPixel(w + k + 1, h + 1)))) { |
| 497 bVal = pArithDecoder->DECODE(&grContext[CONTEXT]); |
| 498 } |
| 499 cVal |= bVal << (7 - k); |
| 500 CONTEXT = ((CONTEXT & 0x018d) << 1) | (bVal << 6) | |
| 501 ((line1 >> (7 - k)) & 0x0080) | |
| 502 ((line1_r >> (9 - k)) & 0x0020) | |
| 503 ((line2_r >> (11 - k)) & 0x0004) | |
| 504 ((line3_r >> (13 - k)) & 0x0001); |
| 505 } |
| 506 pLine[w >> 3] = cVal; |
| 507 } |
| 508 } |
| 509 pLine += nStride; |
| 510 if (h < GRHR + GRREFERENCEDY) { |
| 511 pLineR += nStrideR; |
| 512 } |
| 513 } |
| 514 return GRREG.release(); |
| 515 } |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1359233002:
Split up JBig2_GeneralDecoder.cpp. (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@master