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1 // Copyright 2015 PDFium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | |
6 | |
7 #include "core/src/fxcodec/jbig2/JBig2_PddProc.h" | |
8 | |
9 #include <memory> | |
10 | |
11 #include "core/src/fxcodec/jbig2/JBig2_GrdProc.h" | |
12 #include "core/src/fxcodec/jbig2/JBig2_Image.h" | |
13 #include "core/src/fxcodec/jbig2/JBig2_PatternDict.h" | |
14 | |
15 CJBig2_PatternDict* CJBig2_PDDProc::decode_Arith( | |
16 CJBig2_ArithDecoder* pArithDecoder, | |
17 JBig2ArithCtx* gbContext, | |
18 IFX_Pause* pPause) { | |
19 FX_DWORD GRAY; | |
20 CJBig2_Image* BHDC = nullptr; | |
21 std::unique_ptr<CJBig2_PatternDict> pDict(new CJBig2_PatternDict()); | |
22 pDict->NUMPATS = GRAYMAX + 1; | |
23 pDict->HDPATS = FX_Alloc(CJBig2_Image*, pDict->NUMPATS); | |
24 JBIG2_memset(pDict->HDPATS, 0, sizeof(CJBig2_Image*) * pDict->NUMPATS); | |
25 | |
26 std::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc()); | |
27 pGRD->MMR = HDMMR; | |
28 pGRD->GBW = (GRAYMAX + 1) * HDPW; | |
29 pGRD->GBH = HDPH; | |
30 pGRD->GBTEMPLATE = HDTEMPLATE; | |
31 pGRD->TPGDON = 0; | |
32 pGRD->USESKIP = 0; | |
33 pGRD->GBAT[0] = -(int32_t)HDPW; | |
34 pGRD->GBAT[1] = 0; | |
35 if (pGRD->GBTEMPLATE == 0) { | |
36 pGRD->GBAT[2] = -3; | |
37 pGRD->GBAT[3] = -1; | |
38 pGRD->GBAT[4] = 2; | |
39 pGRD->GBAT[5] = -2; | |
40 pGRD->GBAT[6] = -2; | |
41 pGRD->GBAT[7] = -2; | |
42 } | |
43 FXCODEC_STATUS status = | |
44 pGRD->Start_decode_Arith(&BHDC, pArithDecoder, gbContext, nullptr); | |
45 while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) { | |
46 pGRD->Continue_decode(pPause); | |
47 } | |
48 if (!BHDC) | |
49 return nullptr; | |
50 | |
51 GRAY = 0; | |
52 while (GRAY <= GRAYMAX) { | |
53 pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH); | |
54 GRAY = GRAY + 1; | |
55 } | |
56 delete BHDC; | |
57 return pDict.release(); | |
58 } | |
59 | |
60 CJBig2_PatternDict* CJBig2_PDDProc::decode_MMR(CJBig2_BitStream* pStream, | |
61 IFX_Pause* pPause) { | |
62 FX_DWORD GRAY; | |
63 CJBig2_Image* BHDC = nullptr; | |
64 std::unique_ptr<CJBig2_PatternDict> pDict(new CJBig2_PatternDict()); | |
65 pDict->NUMPATS = GRAYMAX + 1; | |
66 pDict->HDPATS = FX_Alloc(CJBig2_Image*, pDict->NUMPATS); | |
67 JBIG2_memset(pDict->HDPATS, 0, sizeof(CJBig2_Image*) * pDict->NUMPATS); | |
68 | |
69 std::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc()); | |
70 pGRD->MMR = HDMMR; | |
71 pGRD->GBW = (GRAYMAX + 1) * HDPW; | |
72 pGRD->GBH = HDPH; | |
73 FXCODEC_STATUS status = pGRD->Start_decode_MMR(&BHDC, pStream, nullptr); | |
74 while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) { | |
75 pGRD->Continue_decode(pPause); | |
76 } | |
77 if (!BHDC) | |
78 return nullptr; | |
79 | |
80 GRAY = 0; | |
81 while (GRAY <= GRAYMAX) { | |
82 pDict->HDPATS[GRAY] = BHDC->subImage(HDPW * GRAY, 0, HDPW, HDPH); | |
83 GRAY = GRAY + 1; | |
84 } | |
85 delete BHDC; | |
86 return pDict.release(); | |
87 } | |
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