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 "core/fxcodec/jbig2/JBig2_PddProc.h" 8 9#include <memory> 10 11#include "core/fxcodec/jbig2/JBig2_GrdProc.h" 12#include "core/fxcodec/jbig2/JBig2_Image.h" 13#include "core/fxcodec/jbig2/JBig2_PatternDict.h" 14 15CJBig2_PatternDict* CJBig2_PDDProc::decode_Arith( 16 CJBig2_ArithDecoder* pArithDecoder, 17 JBig2ArithCtx* gbContext, 18 IFX_Pause* pPause) { 19 uint32_t 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 status = pGRD->Continue_decode(pPause); 47 if (!BHDC) 48 return nullptr; 49 50 GRAY = 0; 51 while (GRAY <= GRAYMAX) { 52 pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH); 53 GRAY = GRAY + 1; 54 } 55 delete BHDC; 56 return pDict.release(); 57} 58 59CJBig2_PatternDict* CJBig2_PDDProc::decode_MMR(CJBig2_BitStream* pStream, 60 IFX_Pause* pPause) { 61 uint32_t GRAY; 62 CJBig2_Image* BHDC = nullptr; 63 std::unique_ptr<CJBig2_PatternDict> pDict(new CJBig2_PatternDict()); 64 pDict->NUMPATS = GRAYMAX + 1; 65 pDict->HDPATS = FX_Alloc(CJBig2_Image*, pDict->NUMPATS); 66 JBIG2_memset(pDict->HDPATS, 0, sizeof(CJBig2_Image*) * pDict->NUMPATS); 67 68 std::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc()); 69 pGRD->MMR = HDMMR; 70 pGRD->GBW = (GRAYMAX + 1) * HDPW; 71 pGRD->GBH = HDPH; 72 pGRD->Start_decode_MMR(&BHDC, pStream, nullptr); 73 if (!BHDC) 74 return nullptr; 75 76 GRAY = 0; 77 while (GRAY <= GRAYMAX) { 78 pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH); 79 GRAY = GRAY + 1; 80 } 81 delete BHDC; 82 return pDict.release(); 83} 84