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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_HtrdProc.h" |
| 8 |
| 9 #include "../../../../third_party/base/nonstd_unique_ptr.h" |
| 10 #include "../../../include/fxcrt/fx_basic.h" |
| 11 #include "JBig2_GsidProc.h" |
| 12 |
| 13 CJBig2_Image* CJBig2_HTRDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder, |
| 14 JBig2ArithCtx* gbContext, |
| 15 IFX_Pause* pPause) { |
| 16 FX_DWORD ng, mg; |
| 17 int32_t x, y; |
| 18 FX_DWORD HBPP; |
| 19 FX_DWORD* GI; |
| 20 nonstd::unique_ptr<CJBig2_Image> HSKIP; |
| 21 nonstd::unique_ptr<CJBig2_Image> HTREG(new CJBig2_Image(HBW, HBH)); |
| 22 HTREG->fill(HDEFPIXEL); |
| 23 if (HENABLESKIP == 1) { |
| 24 HSKIP.reset(new CJBig2_Image(HGW, HGH)); |
| 25 for (mg = 0; mg < HGH; mg++) { |
| 26 for (ng = 0; ng < HGW; ng++) { |
| 27 x = (HGX + mg * HRY + ng * HRX) >> 8; |
| 28 y = (HGY + mg * HRX - ng * HRY) >> 8; |
| 29 if ((x + HPW <= 0) | (x >= (int32_t)HBW) | (y + HPH <= 0) | |
| 30 (y >= (int32_t)HPH)) { |
| 31 HSKIP->setPixel(ng, mg, 1); |
| 32 } else { |
| 33 HSKIP->setPixel(ng, mg, 0); |
| 34 } |
| 35 } |
| 36 } |
| 37 } |
| 38 HBPP = 1; |
| 39 while ((FX_DWORD)(1 << HBPP) < HNUMPATS) { |
| 40 HBPP++; |
| 41 } |
| 42 nonstd::unique_ptr<CJBig2_GSIDProc> pGID(new CJBig2_GSIDProc()); |
| 43 pGID->GSMMR = HMMR; |
| 44 pGID->GSW = HGW; |
| 45 pGID->GSH = HGH; |
| 46 pGID->GSBPP = (uint8_t)HBPP; |
| 47 pGID->GSUSESKIP = HENABLESKIP; |
| 48 pGID->GSKIP = HSKIP.get(); |
| 49 pGID->GSTEMPLATE = HTEMPLATE; |
| 50 GI = pGID->decode_Arith(pArithDecoder, gbContext, pPause); |
| 51 if (!GI) |
| 52 return nullptr; |
| 53 |
| 54 for (mg = 0; mg < HGH; mg++) { |
| 55 for (ng = 0; ng < HGW; ng++) { |
| 56 x = (HGX + mg * HRY + ng * HRX) >> 8; |
| 57 y = (HGY + mg * HRX - ng * HRY) >> 8; |
| 58 FX_DWORD pat_index = GI[mg * HGW + ng]; |
| 59 if (pat_index >= HNUMPATS) { |
| 60 pat_index = HNUMPATS - 1; |
| 61 } |
| 62 HTREG->composeFrom(x, y, HPATS[pat_index], HCOMBOP); |
| 63 } |
| 64 } |
| 65 FX_Free(GI); |
| 66 return HTREG.release(); |
| 67 } |
| 68 |
| 69 CJBig2_Image* CJBig2_HTRDProc::decode_MMR(CJBig2_BitStream* pStream, |
| 70 IFX_Pause* pPause) { |
| 71 FX_DWORD ng, mg; |
| 72 int32_t x, y; |
| 73 FX_DWORD* GI; |
| 74 nonstd::unique_ptr<CJBig2_Image> HTREG(new CJBig2_Image(HBW, HBH)); |
| 75 HTREG->fill(HDEFPIXEL); |
| 76 FX_DWORD HBPP = 1; |
| 77 while ((FX_DWORD)(1 << HBPP) < HNUMPATS) { |
| 78 HBPP++; |
| 79 } |
| 80 nonstd::unique_ptr<CJBig2_GSIDProc> pGID(new CJBig2_GSIDProc()); |
| 81 pGID->GSMMR = HMMR; |
| 82 pGID->GSW = HGW; |
| 83 pGID->GSH = HGH; |
| 84 pGID->GSBPP = (uint8_t)HBPP; |
| 85 pGID->GSUSESKIP = 0; |
| 86 GI = pGID->decode_MMR(pStream, pPause); |
| 87 if (!GI) |
| 88 return nullptr; |
| 89 |
| 90 for (mg = 0; mg < HGH; mg++) { |
| 91 for (ng = 0; ng < HGW; ng++) { |
| 92 x = (HGX + mg * HRY + ng * HRX) >> 8; |
| 93 y = (HGY + mg * HRX - ng * HRY) >> 8; |
| 94 FX_DWORD pat_index = GI[mg * HGW + ng]; |
| 95 if (pat_index >= HNUMPATS) { |
| 96 pat_index = HNUMPATS - 1; |
| 97 } |
| 98 HTREG->composeFrom(x, y, HPATS[pat_index], HCOMBOP); |
| 99 } |
| 100 } |
| 101 FX_Free(GI); |
| 102 return HTREG.release(); |
| 103 } |
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