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1 // Copyright 2014 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 // Original code is licensed as follows: | |
7 /* | |
8 * Copyright 2007 ZXing authors | |
9 * | |
10 * Licensed under the Apache License, Version 2.0 (the "License"); | |
11 * you may not use this file except in compliance with the License. | |
12 * You may obtain a copy of the License at | |
13 * | |
14 * http://www.apache.org/licenses/LICENSE-2.0 | |
15 * | |
16 * Unless required by applicable law or agreed to in writing, software | |
17 * distributed under the License is distributed on an "AS IS" BASIS, | |
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
19 * See the License for the specific language governing permissions and | |
20 * limitations under the License. | |
21 */ | |
22 | |
23 #include "barcode.h" | |
24 #include "include/BC_QRCoderErrorCorrectionLevel.h" | |
25 #include "include/BC_QRCoderFormatInformation.h" | |
26 const FX_INT32 CBC_QRCoderFormatInformation::FORMAT_INFO_MASK_QR = 0X5412; | |
27 const FX_INT32 CBC_QRCoderFormatInformation::FORMAT_INFO_DECODE_LOOKUP[32][2] =
{ | |
28 {0x5412, 0x00}, | |
29 {0x5125, 0x01}, | |
30 {0x5E7C, 0x02}, | |
31 {0x5B4B, 0x03}, | |
32 {0x45F9, 0x04}, | |
33 {0x40CE, 0x05}, | |
34 {0x4F97, 0x06}, | |
35 {0x4AA0, 0x07}, | |
36 {0x77C4, 0x08}, | |
37 {0x72F3, 0x09}, | |
38 {0x7DAA, 0x0A}, | |
39 {0x789D, 0x0B}, | |
40 {0x662F, 0x0C}, | |
41 {0x6318, 0x0D}, | |
42 {0x6C41, 0x0E}, | |
43 {0x6976, 0x0F}, | |
44 {0x1689, 0x10}, | |
45 {0x13BE, 0x11}, | |
46 {0x1CE7, 0x12}, | |
47 {0x19D0, 0x13}, | |
48 {0x0762, 0x14}, | |
49 {0x0255, 0x15}, | |
50 {0x0D0C, 0x16}, | |
51 {0x083B, 0x17}, | |
52 {0x355F, 0x18}, | |
53 {0x3068, 0x19}, | |
54 {0x3F31, 0x1A}, | |
55 {0x3A06, 0x1B}, | |
56 {0x24B4, 0x1C}, | |
57 {0x2183, 0x1D}, | |
58 {0x2EDA, 0x1E}, | |
59 {0x2BED, 0x1F}, | |
60 }; | |
61 const FX_INT32 CBC_QRCoderFormatInformation::BITS_SET_IN_HALF_BYTE[] = | |
62 {0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4}; | |
63 CBC_QRCoderFormatInformation::CBC_QRCoderFormatInformation(FX_INT32 formatInfo) | |
64 { | |
65 m_errorCorrectLevl = CBC_QRCoderErrorCorrectionLevel::ForBits((formatInfo >>
3) & 0x03); | |
66 m_dataMask = (FX_BYTE) (formatInfo & 0x07); | |
67 } | |
68 CBC_QRCoderFormatInformation::~CBC_QRCoderFormatInformation() | |
69 { | |
70 } | |
71 FX_INT32 CBC_QRCoderFormatInformation::NumBitsDiffering(FX_INT32 a, FX_INT32 b) | |
72 { | |
73 a ^= b; | |
74 return BITS_SET_IN_HALF_BYTE[a & 0x0F] + | |
75 BITS_SET_IN_HALF_BYTE[(a >> 4) & 0x0F] + | |
76 BITS_SET_IN_HALF_BYTE[(a >> 8) & 0x0F] + | |
77 BITS_SET_IN_HALF_BYTE[(a >> 12) & 0x0F] + | |
78 BITS_SET_IN_HALF_BYTE[(a >> 16) & 0x0F] + | |
79 BITS_SET_IN_HALF_BYTE[(a >> 20) & 0x0F] + | |
80 BITS_SET_IN_HALF_BYTE[(a >> 24) & 0x0F] + | |
81 BITS_SET_IN_HALF_BYTE[(a >> 28) & 0x0F]; | |
82 } | |
83 FX_BYTE CBC_QRCoderFormatInformation::GetDataMask() | |
84 { | |
85 return m_dataMask; | |
86 } | |
87 CBC_QRCoderErrorCorrectionLevel *CBC_QRCoderFormatInformation::GetErrorCorrectio
nLevel() | |
88 { | |
89 return m_errorCorrectLevl; | |
90 } | |
91 CBC_QRCoderFormatInformation* CBC_QRCoderFormatInformation::DecodeFormatInformat
ion(FX_INT32 maskedFormatInfo) | |
92 { | |
93 CBC_QRCoderFormatInformation* formatInfo = DoDecodeFormatInformation(maskedF
ormatInfo); | |
94 if(formatInfo != NULL) { | |
95 return formatInfo; | |
96 } | |
97 return DoDecodeFormatInformation(maskedFormatInfo ^ FORMAT_INFO_MASK_QR); | |
98 } | |
99 CBC_QRCoderFormatInformation* CBC_QRCoderFormatInformation::DoDecodeFormatInform
ation(FX_INT32 maskedFormatInfo) | |
100 { | |
101 FX_INT32 bestDifference = (FX_INT32)FXSYS_nan(); | |
102 FX_INT32 bestFormatInfo = 0; | |
103 for(FX_INT32 i = 0; i < 32; i++) { | |
104 FX_INT32 const* decodeInfo = &FORMAT_INFO_DECODE_LOOKUP[i][0]; | |
105 FX_INT32 targetInfo = decodeInfo[0]; | |
106 if(targetInfo == maskedFormatInfo) { | |
107 return FX_NEW CBC_QRCoderFormatInformation(decodeInfo[1]); | |
108 } | |
109 FX_INT32 bitsDifference = NumBitsDiffering(maskedFormatInfo, targetInfo)
; | |
110 if(bitsDifference < bestDifference) { | |
111 bestFormatInfo = decodeInfo[1]; | |
112 bestDifference = bitsDifference; | |
113 } | |
114 } | |
115 if(bestDifference <= 3) { | |
116 return FX_NEW CBC_QRCoderFormatInformation(bestFormatInfo); | |
117 } | |
118 return NULL; | |
119 } | |
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