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