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// 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 "../common/BC_CommonBitMatrix.h"
#include "BC_QRCoderVersion.h"
#include "BC_QRCoderFormatInformation.h"
#include "BC_QRDataMask.h"
#include "BC_QRBitMatrixParser.h"
CBC_QRBitMatrixParser::CBC_QRBitMatrixParser()
{
}
void CBC_QRBitMatrixParser::Init(CBC_CommonBitMatrix *bitMatrix, FX_INT32 &e)
{
m_dimension = bitMatrix->GetDimension(e);
BC_EXCEPTION_CHECK_ReturnVoid(e);
m_tempBitMatrix = bitMatrix;
if(m_dimension < 21 || (m_dimension & 0x03) != 1) {
e = BCExceptionRead;
BC_EXCEPTION_CHECK_ReturnVoid(e);
}
m_bitMatrix = m_tempBitMatrix;
m_parsedFormatInfo = NULL;
m_version = NULL;
}
CBC_QRBitMatrixParser::~CBC_QRBitMatrixParser()
{
if(m_parsedFormatInfo != NULL) {
delete m_parsedFormatInfo;
m_parsedFormatInfo = NULL;
}
m_version = NULL;
}
CBC_QRCoderFormatInformation* CBC_QRBitMatrixParser::ReadFormatInformation(FX_INT32 &e)
{
if(m_parsedFormatInfo != NULL) {
return m_parsedFormatInfo;
}
FX_INT32 formatInfoBits = 0;
FX_INT32 j;
for( j = 0; j < 6; j++) {
formatInfoBits = CopyBit(8, j, formatInfoBits);
}
formatInfoBits = CopyBit(8, 7, formatInfoBits);
formatInfoBits = CopyBit(8, 8, formatInfoBits);
formatInfoBits = CopyBit(7, 8, formatInfoBits);
for(FX_INT32 i = 5; i >= 0; i--) {
formatInfoBits = CopyBit(i, 8, formatInfoBits);
}
m_parsedFormatInfo = CBC_QRCoderFormatInformation::DecodeFormatInformation(formatInfoBits);
if(m_parsedFormatInfo != NULL) {
return m_parsedFormatInfo;
}
FX_INT32 dimension = m_bitMatrix->GetDimension(e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
formatInfoBits = 0;
FX_INT32 iMin = dimension - 8;
for(j = dimension - 1; j >= iMin; j--) {
formatInfoBits = CopyBit(j, 8, formatInfoBits);
}
for(FX_INT32 k = dimension - 7; k < dimension; k++) {
formatInfoBits = CopyBit(8, k , formatInfoBits);
}
m_parsedFormatInfo = CBC_QRCoderFormatInformation::DecodeFormatInformation(formatInfoBits);
if(m_parsedFormatInfo != NULL) {
return m_parsedFormatInfo;
}
e = BCExceptionRead;
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
return NULL;
}
CBC_QRCoderVersion* CBC_QRBitMatrixParser::ReadVersion(FX_INT32 &e)
{
if(m_version != NULL) {
return m_version;
}
FX_INT32 dimension = m_bitMatrix->GetDimension(e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
FX_INT32 provisionVersion = (dimension - 17) >> 2;
if(provisionVersion <= 6) {
CBC_QRCoderVersion* qrv = CBC_QRCoderVersion::GetVersionForNumber(provisionVersion, e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
return qrv;
}
FX_INT32 versionBits = 0;
for (FX_INT32 i = 5; i >= 0; i--) {
FX_INT32 jMin = dimension - 11;
for (FX_INT32 j = dimension - 9; j >= jMin; j--) {
versionBits = CopyBit(i, j, versionBits);
}
}
m_version = CBC_QRCoderVersion::DecodeVersionInformation(versionBits, e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
if (m_version != NULL && m_version->GetDimensionForVersion() == dimension) {
return m_version;
}
versionBits = 0;
for (FX_INT32 j = 5; j >= 0; j--) {
FX_INT32 iMin = dimension - 11;
for (FX_INT32 i = dimension - 9; i >= iMin; i--) {
versionBits = CopyBit(i, j, versionBits);
}
}
m_version = CBC_QRCoderVersion::DecodeVersionInformation(versionBits, e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
if (m_version != NULL && m_version->GetDimensionForVersion() == dimension) {
return m_version;
}
e = BCExceptionRead;
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
return NULL;
}
FX_INT32 CBC_QRBitMatrixParser::CopyBit(FX_INT32 i, FX_INT32 j, FX_INT32 versionBits)
{
return m_bitMatrix->Get(j, i) ? (versionBits << 1) | 0x1 : versionBits << 1;
}
CFX_ByteArray* CBC_QRBitMatrixParser::ReadCodewords(FX_INT32 &e)
{
CBC_QRCoderFormatInformation *formatInfo = ReadFormatInformation(e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL)
CBC_QRCoderVersion *version = ReadVersion(e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
CBC_QRDataMask *dataMask = CBC_QRDataMask::ForReference((FX_INT32)(formatInfo->GetDataMask()), e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
FX_INT32 dimension = m_bitMatrix->GetDimension(e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
dataMask->UnmaskBitMatirx(m_bitMatrix, dimension);
CBC_CommonBitMatrix* cbm = version->BuildFunctionPattern(e);
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
CBC_AutoPtr<CBC_CommonBitMatrix > functionPattern(cbm);
FX_BOOL readingUp = TRUE;
CFX_ByteArray * temp = FX_NEW CFX_ByteArray;
temp->SetSize(version->GetTotalCodeWords());
CBC_AutoPtr<CFX_ByteArray> result(temp);
FX_INT32 resultOffset = 0;
FX_INT32 currentByte = 0;
FX_INT32 bitsRead = 0;
for(FX_INT32 j = dimension - 1; j > 0; j -= 2) {
if(j == 6) {
j--;
}
for(FX_INT32 count = 0; count < dimension; count++) {
FX_INT32 i = readingUp ? dimension - 1 - count : count;
for(FX_INT32 col = 0; col < 2; col++) {
if(!functionPattern->Get(j - col, i)) {
bitsRead++;
currentByte <<= 1;
if(m_bitMatrix->Get(j - col, i)) {
currentByte |= 1;
}
if(bitsRead == 8) {
(*result)[resultOffset++] = (FX_BYTE) currentByte;
bitsRead = 0;
currentByte = 0;
}
}
}
}
readingUp ^= TRUE;
}
if(resultOffset != version->GetTotalCodeWords()) {
e = BCExceptionRead;
BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
}
return result.release();
}
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