| // Copyright 2015 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #include "core/fxcodec/jbig2/JBig2_PddProc.h" |
| |
| #include <memory> |
| |
| #include "core/fxcodec/jbig2/JBig2_GrdProc.h" |
| #include "core/fxcodec/jbig2/JBig2_Image.h" |
| #include "core/fxcodec/jbig2/JBig2_PatternDict.h" |
| #include "third_party/base/ptr_util.h" |
| |
| std::unique_ptr<CJBig2_PatternDict> CJBig2_PDDProc::decode_Arith( |
| CJBig2_ArithDecoder* pArithDecoder, |
| JBig2ArithCtx* gbContext, |
| IFX_Pause* pPause) { |
| uint32_t GRAY; |
| std::unique_ptr<CJBig2_Image> BHDC; |
| auto pDict = pdfium::MakeUnique<CJBig2_PatternDict>(GRAYMAX + 1); |
| |
| auto pGRD = pdfium::MakeUnique<CJBig2_GRDProc>(); |
| pGRD->MMR = HDMMR; |
| pGRD->GBW = (GRAYMAX + 1) * HDPW; |
| pGRD->GBH = HDPH; |
| pGRD->GBTEMPLATE = HDTEMPLATE; |
| pGRD->TPGDON = 0; |
| pGRD->USESKIP = 0; |
| pGRD->GBAT[0] = -(int32_t)HDPW; |
| pGRD->GBAT[1] = 0; |
| if (pGRD->GBTEMPLATE == 0) { |
| pGRD->GBAT[2] = -3; |
| pGRD->GBAT[3] = -1; |
| pGRD->GBAT[4] = 2; |
| pGRD->GBAT[5] = -2; |
| pGRD->GBAT[6] = -2; |
| pGRD->GBAT[7] = -2; |
| } |
| FXCODEC_STATUS status = |
| pGRD->Start_decode_Arith(&BHDC, pArithDecoder, gbContext, nullptr); |
| while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) |
| status = pGRD->Continue_decode(pPause, pArithDecoder); |
| if (!BHDC) |
| return nullptr; |
| |
| GRAY = 0; |
| while (GRAY <= GRAYMAX) { |
| pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH); |
| GRAY = GRAY + 1; |
| } |
| return pDict; |
| } |
| |
| std::unique_ptr<CJBig2_PatternDict> CJBig2_PDDProc::decode_MMR( |
| CJBig2_BitStream* pStream) { |
| uint32_t GRAY; |
| std::unique_ptr<CJBig2_Image> BHDC; |
| auto pDict = pdfium::MakeUnique<CJBig2_PatternDict>(GRAYMAX + 1); |
| |
| auto pGRD = pdfium::MakeUnique<CJBig2_GRDProc>(); |
| pGRD->MMR = HDMMR; |
| pGRD->GBW = (GRAYMAX + 1) * HDPW; |
| pGRD->GBH = HDPH; |
| pGRD->Start_decode_MMR(&BHDC, pStream); |
| if (!BHDC) |
| return nullptr; |
| |
| GRAY = 0; |
| while (GRAY <= GRAYMAX) { |
| pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH); |
| GRAY = GRAY + 1; |
| } |
| return pDict; |
| } |