blob: 9d274f9a4ab9cfd81a222bea1a4ec4275fb7fcc6 (
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
77
78
79
80
81
82
83
84
85
86
|
// 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) {
std::unique_ptr<CJBig2_GRDProc> pGRD = CreateGRDProc();
if (!pGRD)
return nullptr;
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_GRDProc> pGRD = CreateGRDProc();
if (!pGRD)
return nullptr;
std::unique_ptr<CJBig2_Image> BHDC;
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;
}
std::unique_ptr<CJBig2_GRDProc> CJBig2_PDDProc::CreateGRDProc() {
uint32_t width = (GRAYMAX + 1) * HDPW;
uint32_t height = HDPH;
if (width > JBIG2_MAX_IMAGE_SIZE || height > JBIG2_MAX_IMAGE_SIZE)
return nullptr;
auto pGRD = pdfium::MakeUnique<CJBig2_GRDProc>();
pGRD->MMR = HDMMR;
pGRD->GBW = width;
pGRD->GBH = height;
return pGRD;
}
|
