summaryrefslogtreecommitdiff
path: root/core/fxcodec/jbig2/JBig2_PddProc.cpp
blob: 82364b6ae2feba8d57336efcc940e0d179dc1bad (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
// 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) {
  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] = -1 * static_cast<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;
  }

  std::unique_ptr<CJBig2_Image> BHDC;
  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;

  auto pDict = pdfium::MakeUnique<CJBig2_PatternDict>(GRAYMAX + 1);
  for (uint32_t GRAY = 0; GRAY <= GRAYMAX; ++GRAY)
    pDict->HDPATS[GRAY] = BHDC->SubImage(HDPW * GRAY, 0, HDPW, HDPH);
  return pDict;
}

std::unique_ptr<CJBig2_PatternDict> CJBig2_PDDProc::DecodeMMR(
    CJBig2_BitStream* pStream) {
  std::unique_ptr<CJBig2_Image> BHDC;
  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;

  auto pDict = pdfium::MakeUnique<CJBig2_PatternDict>(GRAYMAX + 1);
  for (uint32_t GRAY = 0; GRAY <= GRAYMAX; ++GRAY)
    pDict->HDPATS[GRAY] = BHDC->SubImage(HDPW * GRAY, 0, HDPW, HDPH);
  return pDict;
}