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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 "JBig2_PddProc.h"
#include "JBig2_GrdProc.h"
#include "JBig2_Image.h"
#include "JBig2_PatternDict.h"
#include "third_party/base/nonstd_unique_ptr.h"
CJBig2_PatternDict* CJBig2_PDDProc::decode_Arith(
CJBig2_ArithDecoder* pArithDecoder,
JBig2ArithCtx* gbContext,
IFX_Pause* pPause) {
FX_DWORD GRAY;
CJBig2_Image* BHDC = nullptr;
nonstd::unique_ptr<CJBig2_PatternDict> pDict(new CJBig2_PatternDict());
pDict->NUMPATS = GRAYMAX + 1;
pDict->HDPATS = FX_Alloc(CJBig2_Image*, pDict->NUMPATS);
JBIG2_memset(pDict->HDPATS, 0, sizeof(CJBig2_Image*) * pDict->NUMPATS);
nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new 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) {
pGRD->Continue_decode(pPause);
}
if (!BHDC)
return nullptr;
GRAY = 0;
while (GRAY <= GRAYMAX) {
pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH);
GRAY = GRAY + 1;
}
delete BHDC;
return pDict.release();
}
CJBig2_PatternDict* CJBig2_PDDProc::decode_MMR(CJBig2_BitStream* pStream,
IFX_Pause* pPause) {
FX_DWORD GRAY;
CJBig2_Image* BHDC = nullptr;
nonstd::unique_ptr<CJBig2_PatternDict> pDict(new CJBig2_PatternDict());
pDict->NUMPATS = GRAYMAX + 1;
pDict->HDPATS = FX_Alloc(CJBig2_Image*, pDict->NUMPATS);
JBIG2_memset(pDict->HDPATS, 0, sizeof(CJBig2_Image*) * pDict->NUMPATS);
nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
pGRD->MMR = HDMMR;
pGRD->GBW = (GRAYMAX + 1) * HDPW;
pGRD->GBH = HDPH;
FXCODEC_STATUS status = pGRD->Start_decode_MMR(&BHDC, pStream, nullptr);
while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
pGRD->Continue_decode(pPause);
}
if (!BHDC)
return nullptr;
GRAY = 0;
while (GRAY <= GRAYMAX) {
pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH);
GRAY = GRAY + 1;
}
delete BHDC;
return pDict.release();
}
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