// Copyright 2014 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 | |
// Original code is licensed as follows: | |
/* | |
* Copyright 2007 ZXing authors | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
#include "../barcode.h" | |
#include "BC_QRCoderErrorCorrectionLevel.h" | |
#include "BC_QRCoderFormatInformation.h" | |
const FX_INT32 CBC_QRCoderFormatInformation::FORMAT_INFO_MASK_QR = 0X5412; | |
const FX_INT32 CBC_QRCoderFormatInformation::FORMAT_INFO_DECODE_LOOKUP[32][2] = { | |
{0x5412, 0x00}, | |
{0x5125, 0x01}, | |
{0x5E7C, 0x02}, | |
{0x5B4B, 0x03}, | |
{0x45F9, 0x04}, | |
{0x40CE, 0x05}, | |
{0x4F97, 0x06}, | |
{0x4AA0, 0x07}, | |
{0x77C4, 0x08}, | |
{0x72F3, 0x09}, | |
{0x7DAA, 0x0A}, | |
{0x789D, 0x0B}, | |
{0x662F, 0x0C}, | |
{0x6318, 0x0D}, | |
{0x6C41, 0x0E}, | |
{0x6976, 0x0F}, | |
{0x1689, 0x10}, | |
{0x13BE, 0x11}, | |
{0x1CE7, 0x12}, | |
{0x19D0, 0x13}, | |
{0x0762, 0x14}, | |
{0x0255, 0x15}, | |
{0x0D0C, 0x16}, | |
{0x083B, 0x17}, | |
{0x355F, 0x18}, | |
{0x3068, 0x19}, | |
{0x3F31, 0x1A}, | |
{0x3A06, 0x1B}, | |
{0x24B4, 0x1C}, | |
{0x2183, 0x1D}, | |
{0x2EDA, 0x1E}, | |
{0x2BED, 0x1F}, | |
}; | |
const FX_INT32 CBC_QRCoderFormatInformation::BITS_SET_IN_HALF_BYTE[] = | |
{0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4}; | |
CBC_QRCoderFormatInformation::CBC_QRCoderFormatInformation(FX_INT32 formatInfo) | |
{ | |
m_errorCorrectLevl = CBC_QRCoderErrorCorrectionLevel::ForBits((formatInfo >> 3) & 0x03); | |
m_dataMask = (FX_BYTE) (formatInfo & 0x07); | |
} | |
CBC_QRCoderFormatInformation::~CBC_QRCoderFormatInformation() | |
{ | |
} | |
FX_INT32 CBC_QRCoderFormatInformation::NumBitsDiffering(FX_INT32 a, FX_INT32 b) | |
{ | |
a ^= b; | |
return BITS_SET_IN_HALF_BYTE[a & 0x0F] + | |
BITS_SET_IN_HALF_BYTE[(a >> 4) & 0x0F] + | |
BITS_SET_IN_HALF_BYTE[(a >> 8) & 0x0F] + | |
BITS_SET_IN_HALF_BYTE[(a >> 12) & 0x0F] + | |
BITS_SET_IN_HALF_BYTE[(a >> 16) & 0x0F] + | |
BITS_SET_IN_HALF_BYTE[(a >> 20) & 0x0F] + | |
BITS_SET_IN_HALF_BYTE[(a >> 24) & 0x0F] + | |
BITS_SET_IN_HALF_BYTE[(a >> 28) & 0x0F]; | |
} | |
FX_BYTE CBC_QRCoderFormatInformation::GetDataMask() | |
{ | |
return m_dataMask; | |
} | |
CBC_QRCoderErrorCorrectionLevel *CBC_QRCoderFormatInformation::GetErrorCorrectionLevel() | |
{ | |
return m_errorCorrectLevl; | |
} | |
CBC_QRCoderFormatInformation* CBC_QRCoderFormatInformation::DecodeFormatInformation(FX_INT32 maskedFormatInfo) | |
{ | |
CBC_QRCoderFormatInformation* formatInfo = DoDecodeFormatInformation(maskedFormatInfo); | |
if(formatInfo != NULL) { | |
return formatInfo; | |
} | |
return DoDecodeFormatInformation(maskedFormatInfo ^ FORMAT_INFO_MASK_QR); | |
} | |
CBC_QRCoderFormatInformation* CBC_QRCoderFormatInformation::DoDecodeFormatInformation(FX_INT32 maskedFormatInfo) | |
{ | |
FX_INT32 bestDifference = (FX_INT32)FXSYS_nan(); | |
FX_INT32 bestFormatInfo = 0; | |
for(FX_INT32 i = 0; i < 32; i++) { | |
FX_INT32 const* decodeInfo = &FORMAT_INFO_DECODE_LOOKUP[i][0]; | |
FX_INT32 targetInfo = decodeInfo[0]; | |
if(targetInfo == maskedFormatInfo) { | |
return FX_NEW CBC_QRCoderFormatInformation(decodeInfo[1]); | |
} | |
FX_INT32 bitsDifference = NumBitsDiffering(maskedFormatInfo, targetInfo); | |
if(bitsDifference < bestDifference) { | |
bestFormatInfo = decodeInfo[1]; | |
bestDifference = bitsDifference; | |
} | |
} | |
if(bestDifference <= 3) { | |
return FX_NEW CBC_QRCoderFormatInformation(bestFormatInfo); | |
} | |
return NULL; | |
} |