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389 lines
12 KiB
389 lines
12 KiB
// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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// Original code is licensed as follows:
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/*
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* Copyright 2008 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "fxbarcode/qrcode/BC_QRCoderMatrixUtil.h"
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#include "core/fxcrt/fx_memory.h"
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#include "fxbarcode/common/BC_CommonByteMatrix.h"
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#include "fxbarcode/qrcode/BC_QRCoder.h"
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#include "fxbarcode/qrcode/BC_QRCoderBitVector.h"
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#include "fxbarcode/qrcode/BC_QRCoderErrorCorrectionLevel.h"
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#include "fxbarcode/qrcode/BC_QRCoderMaskUtil.h"
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namespace {
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constexpr uint8_t POSITION_DETECTION_PATTERN[7][7] = {
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{1, 1, 1, 1, 1, 1, 1}, {1, 0, 0, 0, 0, 0, 1}, {1, 0, 1, 1, 1, 0, 1},
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{1, 0, 1, 1, 1, 0, 1}, {1, 0, 1, 1, 1, 0, 1}, {1, 0, 0, 0, 0, 0, 1},
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{1, 1, 1, 1, 1, 1, 1}};
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constexpr uint8_t POSITION_ADJUSTMENT_PATTERN[5][5] = {{1, 1, 1, 1, 1},
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{1, 0, 0, 0, 1},
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{1, 0, 1, 0, 1},
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{1, 0, 0, 0, 1},
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{1, 1, 1, 1, 1}};
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constexpr size_t kNumCoordinate = 7;
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constexpr uint8_t kPositionAdjustmentPatternCoordinates[39][kNumCoordinate] = {
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{6, 18, 0, 0, 0, 0, 0}, {6, 22, 0, 0, 0, 0, 0},
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{6, 26, 0, 0, 0, 0, 0}, {6, 30, 0, 0, 0, 0, 0},
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{6, 34, 0, 0, 0, 0, 0}, {6, 22, 38, 0, 0, 0, 0},
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{6, 24, 42, 0, 0, 0, 0}, {6, 26, 46, 0, 0, 0, 0},
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{6, 28, 50, 0, 0, 0, 0}, {6, 30, 54, 0, 0, 0, 0},
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{6, 32, 58, 0, 0, 0, 0}, {6, 34, 62, 0, 0, 0, 0},
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{6, 26, 46, 66, 0, 0, 0}, {6, 26, 48, 70, 0, 0, 0},
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{6, 26, 50, 74, 0, 0, 0}, {6, 30, 54, 78, 0, 0, 0},
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{6, 30, 56, 82, 0, 0, 0}, {6, 30, 58, 86, 0, 0, 0},
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{6, 34, 62, 90, 0, 0, 0}, {6, 28, 50, 72, 94, 0, 0},
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{6, 26, 50, 74, 98, 0, 0}, {6, 30, 54, 78, 102, 0, 0},
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{6, 28, 54, 80, 106, 0, 0}, {6, 32, 58, 84, 110, 0, 0},
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{6, 30, 58, 86, 114, 0, 0}, {6, 34, 62, 90, 118, 0, 0},
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{6, 26, 50, 74, 98, 122, 0}, {6, 30, 54, 78, 102, 126, 0},
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{6, 26, 52, 78, 104, 130, 0}, {6, 30, 56, 82, 108, 134, 0},
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{6, 34, 60, 86, 112, 138, 0}, {6, 30, 58, 86, 114, 142, 0},
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{6, 34, 62, 90, 118, 146, 0}, {6, 30, 54, 78, 102, 126, 150},
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{6, 24, 50, 76, 102, 128, 154}, {6, 28, 54, 80, 106, 132, 158},
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{6, 32, 58, 84, 110, 136, 162}, {6, 26, 54, 82, 110, 138, 166},
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{6, 30, 58, 86, 114, 142, 170},
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};
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const uint8_t TYPE_INFO_COORDINATES[15][2] = {
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{8, 0}, {8, 1}, {8, 2}, {8, 3}, {8, 4}, {8, 5}, {8, 7}, {8, 8},
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{7, 8}, {5, 8}, {4, 8}, {3, 8}, {2, 8}, {1, 8}, {0, 8},
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};
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const int32_t VERSION_INFO_POLY = 0x1f25;
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const int32_t TYPE_INFO_POLY = 0x0537;
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const int32_t TYPE_INFO_MASK_PATTERN = 0x5412;
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bool IsEmpty(int32_t value) {
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return (uint8_t)value == 0xff;
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}
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bool IsValidValue(int32_t value) {
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return ((uint8_t)value == 0xff || (uint8_t)value == 0x00 ||
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(uint8_t)value == 0x01);
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}
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int32_t FindMSBSet(int32_t value) {
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int32_t numDigits = 0;
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while (value != 0) {
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value >>= 1;
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++numDigits;
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}
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return numDigits;
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}
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bool EmbedDataBits(CBC_QRCoderBitVector* dataBits,
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int32_t maskPattern,
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CBC_CommonByteMatrix* matrix) {
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size_t szBitIndex = 0;
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int32_t direction = -1;
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int32_t x = matrix->GetWidth() - 1;
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int32_t y = matrix->GetHeight() - 1;
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while (x > 0) {
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if (x == 6)
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x -= 1;
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while (y >= 0 && y < matrix->GetHeight()) {
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if (y == 6) {
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y += direction;
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continue;
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}
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for (int32_t i = 0; i < 2; i++) {
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int32_t xx = x - i;
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if (!IsEmpty(matrix->Get(xx, y))) {
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continue;
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}
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int32_t bit;
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if (szBitIndex < dataBits->Size()) {
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bit = dataBits->At(szBitIndex);
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szBitIndex++;
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} else {
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bit = 0;
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}
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ASSERT(CBC_QRCoder::IsValidMaskPattern(maskPattern));
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if (CBC_QRCoderMaskUtil::GetDataMaskBit(maskPattern, xx, y))
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bit ^= 0x01;
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matrix->Set(xx, y, bit);
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}
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y += direction;
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}
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direction = -direction;
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y += direction;
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x -= 2;
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}
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return szBitIndex == dataBits->Size();
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}
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int32_t CalculateBCHCode(int32_t value, int32_t poly) {
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int32_t msbSetInPoly = FindMSBSet(poly);
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value <<= msbSetInPoly - 1;
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while (FindMSBSet(value) >= msbSetInPoly) {
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value ^= poly << (FindMSBSet(value) - msbSetInPoly);
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}
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return value;
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}
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bool MakeTypeInfoBits(const CBC_QRCoderErrorCorrectionLevel* ecLevel,
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int32_t maskPattern,
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CBC_QRCoderBitVector* bits) {
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if (!CBC_QRCoder::IsValidMaskPattern(maskPattern))
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return false;
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int32_t typeInfo = (ecLevel->GetBits() << 3) | maskPattern;
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bits->AppendBits(typeInfo, 5);
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int32_t bchCode = CalculateBCHCode(typeInfo, TYPE_INFO_POLY);
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bits->AppendBits(bchCode, 10);
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CBC_QRCoderBitVector maskBits;
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maskBits.AppendBits(TYPE_INFO_MASK_PATTERN, 15);
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if (!bits->XOR(&maskBits))
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return false;
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ASSERT(bits->Size() == 15);
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return true;
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}
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void MakeVersionInfoBits(int32_t version, CBC_QRCoderBitVector* bits) {
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bits->AppendBits(version, 6);
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int32_t bchCode = CalculateBCHCode(version, VERSION_INFO_POLY);
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bits->AppendBits(bchCode, 12);
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ASSERT(bits->Size() == 18);
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}
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bool EmbedTypeInfo(const CBC_QRCoderErrorCorrectionLevel* ecLevel,
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int32_t maskPattern,
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CBC_CommonByteMatrix* matrix) {
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CBC_QRCoderBitVector typeInfoBits;
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if (!MakeTypeInfoBits(ecLevel, maskPattern, &typeInfoBits))
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return false;
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for (size_t i = 0; i < typeInfoBits.Size(); i++) {
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int32_t bit = typeInfoBits.At(typeInfoBits.Size() - 1 - i);
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int32_t x1 = TYPE_INFO_COORDINATES[i][0];
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int32_t y1 = TYPE_INFO_COORDINATES[i][1];
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matrix->Set(x1, y1, bit);
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if (i < 8) {
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int32_t x2 = matrix->GetWidth() - i - 1;
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int32_t y2 = 8;
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matrix->Set(x2, y2, bit);
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} else {
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int32_t x2 = 8;
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int32_t y2 = matrix->GetHeight() - 7 + (i - 8);
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matrix->Set(x2, y2, bit);
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}
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}
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return true;
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}
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void MaybeEmbedVersionInfo(int32_t version, CBC_CommonByteMatrix* matrix) {
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if (version < 7)
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return;
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CBC_QRCoderBitVector versionInfoBits;
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MakeVersionInfoBits(version, &versionInfoBits);
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int32_t bitIndex = 6 * 3 - 1;
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for (int32_t i = 0; i < 6; i++) {
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for (int32_t j = 0; j < 3; j++) {
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int32_t bit = versionInfoBits.At(bitIndex);
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bitIndex--;
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matrix->Set(i, matrix->GetHeight() - 11 + j, bit);
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matrix->Set(matrix->GetHeight() - 11 + j, i, bit);
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}
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}
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}
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bool EmbedTimingPatterns(CBC_CommonByteMatrix* matrix) {
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for (int32_t i = 8; i < matrix->GetWidth() - 8; i++) {
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int32_t bit = (i + 1) % 2;
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if (!IsValidValue(matrix->Get(i, 6)))
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return false;
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if (IsEmpty(matrix->Get(i, 6)))
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matrix->Set(i, 6, bit);
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if (!IsValidValue(matrix->Get(6, i)))
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return false;
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if (IsEmpty(matrix->Get(6, i)))
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matrix->Set(6, i, bit);
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}
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return true;
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}
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bool EmbedDarkDotAtLeftBottomCorner(CBC_CommonByteMatrix* matrix) {
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if (matrix->Get(8, matrix->GetHeight() - 8) == 0)
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return false;
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matrix->Set(8, matrix->GetHeight() - 8, 1);
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return true;
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}
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bool EmbedHorizontalSeparationPattern(int32_t xStart,
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int32_t yStart,
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CBC_CommonByteMatrix* matrix) {
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for (int32_t x = 0; x < 8; x++) {
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if (!IsEmpty(matrix->Get(xStart + x, yStart)))
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return false;
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matrix->Set(xStart + x, yStart, 0);
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}
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return true;
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}
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bool EmbedVerticalSeparationPattern(int32_t xStart,
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int32_t yStart,
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CBC_CommonByteMatrix* matrix) {
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for (int32_t y = 0; y < 7; y++) {
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if (!IsEmpty(matrix->Get(xStart, yStart + y)))
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return false;
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matrix->Set(xStart, yStart + y, 0);
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}
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return true;
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}
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bool EmbedPositionAdjustmentPattern(int32_t xStart,
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int32_t yStart,
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CBC_CommonByteMatrix* matrix) {
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for (int32_t y = 0; y < 5; y++) {
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for (int32_t x = 0; x < 5; x++) {
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if (!IsEmpty(matrix->Get(xStart + x, y + yStart)))
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return false;
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matrix->Set(xStart + x, yStart + y, POSITION_ADJUSTMENT_PATTERN[y][x]);
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}
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}
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return true;
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}
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bool EmbedPositionDetectionPattern(int32_t xStart,
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int32_t yStart,
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CBC_CommonByteMatrix* matrix) {
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for (int32_t y = 0; y < 7; y++) {
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for (int32_t x = 0; x < 7; x++) {
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if (!IsEmpty(matrix->Get(xStart + x, yStart + y)))
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return false;
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matrix->Set(xStart + x, yStart + y, POSITION_DETECTION_PATTERN[y][x]);
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}
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}
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return true;
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}
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bool EmbedPositionDetectionPatternsAndSeparators(CBC_CommonByteMatrix* matrix) {
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constexpr int32_t pdpWidth = 7;
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if (!EmbedPositionDetectionPattern(0, 0, matrix))
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return false;
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if (!EmbedPositionDetectionPattern(matrix->GetWidth() - pdpWidth, 0, matrix))
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return false;
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if (!EmbedPositionDetectionPattern(0, matrix->GetWidth() - pdpWidth, matrix))
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return false;
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constexpr int32_t hspWidth = 8;
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if (!EmbedHorizontalSeparationPattern(0, hspWidth - 1, matrix))
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return false;
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if (!EmbedHorizontalSeparationPattern(matrix->GetWidth() - hspWidth,
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hspWidth - 1, matrix)) {
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return false;
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}
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if (!EmbedHorizontalSeparationPattern(0, matrix->GetWidth() - hspWidth,
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matrix)) {
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return false;
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}
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constexpr int32_t vspSize = 7;
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if (!EmbedVerticalSeparationPattern(vspSize, 0, matrix))
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return false;
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if (!EmbedVerticalSeparationPattern(matrix->GetHeight() - vspSize - 1, 0,
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matrix)) {
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return false;
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}
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if (!EmbedVerticalSeparationPattern(vspSize, matrix->GetHeight() - vspSize,
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matrix)) {
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return false;
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}
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return true;
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}
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bool MaybeEmbedPositionAdjustmentPatterns(int32_t version,
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CBC_CommonByteMatrix* matrix) {
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if (version < 2)
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return true;
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const size_t index = version - 2;
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if (index >= FX_ArraySize(kPositionAdjustmentPatternCoordinates))
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return false;
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const auto* coordinates = &kPositionAdjustmentPatternCoordinates[index][0];
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for (size_t i = 0; i < kNumCoordinate; i++) {
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const int32_t y = coordinates[i];
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if (y == 0)
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break;
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for (size_t j = 0; j < kNumCoordinate; j++) {
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const int32_t x = coordinates[j];
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if (x == 0)
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break;
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if (IsEmpty(matrix->Get(x, y))) {
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if (!EmbedPositionAdjustmentPattern(x - 2, y - 2, matrix))
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return false;
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}
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}
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}
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return true;
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}
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bool EmbedBasicPatterns(int32_t version, CBC_CommonByteMatrix* matrix) {
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if (!EmbedPositionDetectionPatternsAndSeparators(matrix))
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return false;
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if (!EmbedDarkDotAtLeftBottomCorner(matrix))
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return false;
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if (!MaybeEmbedPositionAdjustmentPatterns(version, matrix))
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return false;
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if (!EmbedTimingPatterns(matrix))
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return false;
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return true;
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}
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} // namespace
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bool CBC_QRCoderMatrixUtil::BuildMatrix(
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CBC_QRCoderBitVector* dataBits,
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const CBC_QRCoderErrorCorrectionLevel* ecLevel,
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int32_t version,
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int32_t maskPattern,
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CBC_CommonByteMatrix* matrix) {
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if (!dataBits || !matrix)
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return false;
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matrix->clear(0xff);
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if (!EmbedBasicPatterns(version, matrix))
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return false;
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if (!EmbedTypeInfo(ecLevel, maskPattern, matrix))
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return false;
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MaybeEmbedVersionInfo(version, matrix);
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return EmbedDataBits(dataBits, maskPattern, matrix);
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}
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