summaryrefslogtreecommitdiff
path: root/core/fxcodec/jbig2/JBig2_PddProc.cpp
blob: ee891cc0025f3d96796c60178fd0b73e0db12fc2 (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
74
75
76
// 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_PauseIndicator* 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;
}