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_PddProc.h" 8 9 #include <memory> 10 11 #include "JBig2_GrdProc.h" 12 #include "JBig2_Image.h" 13 #include "JBig2_PatternDict.h" 14 15 CJBig2_PatternDict* CJBig2_PDDProc::decode_Arith( 16 CJBig2_ArithDecoder* pArithDecoder, 17 JBig2ArithCtx* gbContext, 18 IFX_Pause* pPause) { 19 FX_DWORD GRAY; 20 CJBig2_Image* BHDC = nullptr; 21 std::unique_ptr<CJBig2_PatternDict> pDict(new CJBig2_PatternDict()); 22 pDict->NUMPATS = GRAYMAX + 1; 23 pDict->HDPATS = FX_Alloc(CJBig2_Image*, pDict->NUMPATS); 24 JBIG2_memset(pDict->HDPATS, 0, sizeof(CJBig2_Image*) * pDict->NUMPATS); 25 26 std::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc()); 27 pGRD->MMR = HDMMR; 28 pGRD->GBW = (GRAYMAX + 1) * HDPW; 29 pGRD->GBH = HDPH; 30 pGRD->GBTEMPLATE = HDTEMPLATE; 31 pGRD->TPGDON = 0; 32 pGRD->USESKIP = 0; 33 pGRD->GBAT[0] = -(int32_t)HDPW; 34 pGRD->GBAT[1] = 0; 35 if (pGRD->GBTEMPLATE == 0) { 36 pGRD->GBAT[2] = -3; 37 pGRD->GBAT[3] = -1; 38 pGRD->GBAT[4] = 2; 39 pGRD->GBAT[5] = -2; 40 pGRD->GBAT[6] = -2; 41 pGRD->GBAT[7] = -2; 42 } 43 FXCODEC_STATUS status = 44 pGRD->Start_decode_Arith(&BHDC, pArithDecoder, gbContext, nullptr); 45 while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) { 46 pGRD->Continue_decode(pPause); 47 } 48 if (!BHDC) 49 return nullptr; 50 51 GRAY = 0; 52 while (GRAY <= GRAYMAX) { 53 pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH); 54 GRAY = GRAY + 1; 55 } 56 delete BHDC; 57 return pDict.release(); 58 } 59 60 CJBig2_PatternDict* CJBig2_PDDProc::decode_MMR(CJBig2_BitStream* pStream, 61 IFX_Pause* pPause) { 62 FX_DWORD GRAY; 63 CJBig2_Image* BHDC = nullptr; 64 std::unique_ptr<CJBig2_PatternDict> pDict(new CJBig2_PatternDict()); 65 pDict->NUMPATS = GRAYMAX + 1; 66 pDict->HDPATS = FX_Alloc(CJBig2_Image*, pDict->NUMPATS); 67 JBIG2_memset(pDict->HDPATS, 0, sizeof(CJBig2_Image*) * pDict->NUMPATS); 68 69 std::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc()); 70 pGRD->MMR = HDMMR; 71 pGRD->GBW = (GRAYMAX + 1) * HDPW; 72 pGRD->GBH = HDPH; 73 FXCODEC_STATUS status = pGRD->Start_decode_MMR(&BHDC, pStream, nullptr); 74 while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) { 75 pGRD->Continue_decode(pPause); 76 } 77 if (!BHDC) 78 return nullptr; 79 80 GRAY = 0; 81 while (GRAY <= GRAYMAX) { 82 pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH); 83 GRAY = GRAY + 1; 84 } 85 delete BHDC; 86 return pDict.release(); 87 } 88
