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 #include "third_party/base/ptr_util.h" 15 16 std::unique_ptr<CJBig2_PatternDict> CJBig2_PDDProc::decode_Arith( 17 CJBig2_ArithDecoder* pArithDecoder, 18 JBig2ArithCtx* gbContext, 19 IFX_PauseIndicator* pPause) { 20 uint32_t GRAY; 21 std::unique_ptr<CJBig2_Image> BHDC; 22 auto pDict = pdfium::MakeUnique<CJBig2_PatternDict>(GRAYMAX + 1); 23 24 auto pGRD = pdfium::MakeUnique<CJBig2_GRDProc>(); 25 pGRD->MMR = HDMMR; 26 pGRD->GBW = (GRAYMAX + 1) * HDPW; 27 pGRD->GBH = HDPH; 28 pGRD->GBTEMPLATE = HDTEMPLATE; 29 pGRD->TPGDON = 0; 30 pGRD->USESKIP = 0; 31 pGRD->GBAT[0] = -(int32_t)HDPW; 32 pGRD->GBAT[1] = 0; 33 if (pGRD->GBTEMPLATE == 0) { 34 pGRD->GBAT[2] = -3; 35 pGRD->GBAT[3] = -1; 36 pGRD->GBAT[4] = 2; 37 pGRD->GBAT[5] = -2; 38 pGRD->GBAT[6] = -2; 39 pGRD->GBAT[7] = -2; 40 } 41 FXCODEC_STATUS status = 42 pGRD->Start_decode_Arith(&BHDC, pArithDecoder, gbContext, nullptr); 43 while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) 44 status = pGRD->Continue_decode(pPause, pArithDecoder); 45 if (!BHDC) 46 return nullptr; 47 48 GRAY = 0; 49 while (GRAY <= GRAYMAX) { 50 pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH); 51 GRAY = GRAY + 1; 52 } 53 return pDict; 54 } 55 56 std::unique_ptr<CJBig2_PatternDict> CJBig2_PDDProc::decode_MMR( 57 CJBig2_BitStream* pStream) { 58 uint32_t GRAY; 59 std::unique_ptr<CJBig2_Image> BHDC; 60 auto pDict = pdfium::MakeUnique<CJBig2_PatternDict>(GRAYMAX + 1); 61 62 auto pGRD = pdfium::MakeUnique<CJBig2_GRDProc>(); 63 pGRD->MMR = HDMMR; 64 pGRD->GBW = (GRAYMAX + 1) * HDPW; 65 pGRD->GBH = HDPH; 66 pGRD->Start_decode_MMR(&BHDC, pStream); 67 if (!BHDC) 68 return nullptr; 69 70 GRAY = 0; 71 while (GRAY <= GRAYMAX) { 72 pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH); 73 GRAY = GRAY + 1; 74 } 75 return pDict; 76 } 77
