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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 "xfa/src/fxbarcode/qrcode/BC_QRCoderErrorCorrectionLevel.h" | |
| 24 #include "xfa/src/fxbarcode/qrcode/BC_QRCoderFormatInformation.h" | |
| 25 #include "xfa/src/fxbarcode/utils.h" | |
| 26 | |
| 27 const int32_t CBC_QRCoderFormatInformation::FORMAT_INFO_MASK_QR = 0X5412; | |
| 28 const int32_t CBC_QRCoderFormatInformation::FORMAT_INFO_DECODE_LOOKUP[32][2] = { | |
| 29 {0x5412, 0x00}, {0x5125, 0x01}, {0x5E7C, 0x02}, {0x5B4B, 0x03}, | |
| 30 {0x45F9, 0x04}, {0x40CE, 0x05}, {0x4F97, 0x06}, {0x4AA0, 0x07}, | |
| 31 {0x77C4, 0x08}, {0x72F3, 0x09}, {0x7DAA, 0x0A}, {0x789D, 0x0B}, | |
| 32 {0x662F, 0x0C}, {0x6318, 0x0D}, {0x6C41, 0x0E}, {0x6976, 0x0F}, | |
| 33 {0x1689, 0x10}, {0x13BE, 0x11}, {0x1CE7, 0x12}, {0x19D0, 0x13}, | |
| 34 {0x0762, 0x14}, {0x0255, 0x15}, {0x0D0C, 0x16}, {0x083B, 0x17}, | |
| 35 {0x355F, 0x18}, {0x3068, 0x19}, {0x3F31, 0x1A}, {0x3A06, 0x1B}, | |
| 36 {0x24B4, 0x1C}, {0x2183, 0x1D}, {0x2EDA, 0x1E}, {0x2BED, 0x1F}, | |
| 37 }; | |
| 38 const int32_t CBC_QRCoderFormatInformation::BITS_SET_IN_HALF_BYTE[] = { | |
| 39 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4}; | |
| 40 | |
| 41 CBC_QRCoderFormatInformation::CBC_QRCoderFormatInformation(int32_t formatInfo) { | |
| 42 m_errorCorrectLevl = | |
| 43 CBC_QRCoderErrorCorrectionLevel::ForBits((formatInfo >> 3) & 0x03); | |
| 44 m_dataMask = (uint8_t)(formatInfo & 0x07); | |
| 45 } | |
| 46 CBC_QRCoderFormatInformation::~CBC_QRCoderFormatInformation() {} | |
| 47 int32_t CBC_QRCoderFormatInformation::NumBitsDiffering(int32_t a, int32_t b) { | |
| 48 a ^= b; | |
| 49 return BITS_SET_IN_HALF_BYTE[a & 0x0F] + | |
| 50 BITS_SET_IN_HALF_BYTE[(a >> 4) & 0x0F] + | |
| 51 BITS_SET_IN_HALF_BYTE[(a >> 8) & 0x0F] + | |
| 52 BITS_SET_IN_HALF_BYTE[(a >> 12) & 0x0F] + | |
| 53 BITS_SET_IN_HALF_BYTE[(a >> 16) & 0x0F] + | |
| 54 BITS_SET_IN_HALF_BYTE[(a >> 20) & 0x0F] + | |
| 55 BITS_SET_IN_HALF_BYTE[(a >> 24) & 0x0F] + | |
| 56 BITS_SET_IN_HALF_BYTE[(a >> 28) & 0x0F]; | |
| 57 } | |
| 58 uint8_t CBC_QRCoderFormatInformation::GetDataMask() { | |
| 59 return m_dataMask; | |
| 60 } | |
| 61 CBC_QRCoderErrorCorrectionLevel* | |
| 62 CBC_QRCoderFormatInformation::GetErrorCorrectionLevel() { | |
| 63 return m_errorCorrectLevl; | |
| 64 } | |
| 65 CBC_QRCoderFormatInformation* | |
| 66 CBC_QRCoderFormatInformation::DecodeFormatInformation( | |
| 67 int32_t maskedFormatInfo) { | |
| 68 CBC_QRCoderFormatInformation* formatInfo = | |
| 69 DoDecodeFormatInformation(maskedFormatInfo); | |
| 70 if (formatInfo) | |
| 71 return formatInfo; | |
| 72 return DoDecodeFormatInformation(maskedFormatInfo ^ FORMAT_INFO_MASK_QR); | |
| 73 } | |
| 74 CBC_QRCoderFormatInformation* | |
| 75 CBC_QRCoderFormatInformation::DoDecodeFormatInformation( | |
| 76 int32_t maskedFormatInfo) { | |
| 77 int32_t bestDifference = (int32_t)FXSYS_nan(); | |
| 78 int32_t bestFormatInfo = 0; | |
| 79 for (int32_t i = 0; i < 32; i++) { | |
| 80 int32_t const* decodeInfo = &FORMAT_INFO_DECODE_LOOKUP[i][0]; | |
| 81 int32_t targetInfo = decodeInfo[0]; | |
| 82 if (targetInfo == maskedFormatInfo) { | |
| 83 return new CBC_QRCoderFormatInformation(decodeInfo[1]); | |
| 84 } | |
| 85 int32_t bitsDifference = NumBitsDiffering(maskedFormatInfo, targetInfo); | |
| 86 if (bitsDifference < bestDifference) { | |
| 87 bestFormatInfo = decodeInfo[1]; | |
| 88 bestDifference = bitsDifference; | |
| 89 } | |
| 90 } | |
| 91 if (bestDifference <= 3) { | |
| 92 return new CBC_QRCoderFormatInformation(bestFormatInfo); | |
| 93 } | |
| 94 return NULL; | |
| 95 } | |
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