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// 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::DecodeArith(
CJBig2_ArithDecoder* pArithDecoder,
JBig2ArithCtx* gbContext,
PauseIndicatorIface* 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;
}
CJBig2_GRDProc::ProgressiveArithDecodeState state;
state.pImage = &BHDC;
state.pArithDecoder = pArithDecoder;
state.gbContext = gbContext;
state.pPause = nullptr;
FXCODEC_STATUS status = pGRD->StartDecodeArith(&state);
state.pPause = pPause;
while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE)
status = pGRD->ContinueDecode(&state);
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::DecodeMMR(
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->StartDecodeMMR(&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;
}
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