diff --git a/SConstruct b/SConstruct index 3aa0c4577d..cdab6220ba 100644 --- a/SConstruct +++ b/SConstruct @@ -174,6 +174,7 @@ env = Environment( "#phonelibs/linux/include", "#phonelibs/snpe/include", "#phonelibs/nanovg", + "#phonelibs/qrcode", "#selfdrive/boardd", "#selfdrive/common", "#selfdrive/camerad", diff --git a/phonelibs/qrcode/QrCode.cc b/phonelibs/qrcode/QrCode.cc new file mode 100644 index 0000000000..de19abc19e --- /dev/null +++ b/phonelibs/qrcode/QrCode.cc @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:0bc2f1d4208463156f9558520af4f00a215ee183ea9426f611ab54e7c62b5691 +size 28562 diff --git a/phonelibs/qrcode/QrCode.hpp b/phonelibs/qrcode/QrCode.hpp new file mode 100644 index 0000000000..7cce094b08 --- /dev/null +++ b/phonelibs/qrcode/QrCode.hpp @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:6961ccf04acda6dd6da2e542b28634ccab5ac8073163f9cb64e7713eb39712d5 +size 20659 diff --git a/release/files_common b/release/files_common index 21f96f861c..fe12037f8f 100644 --- a/release/files_common +++ b/release/files_common @@ -441,6 +441,9 @@ phonelibs/json11/json11.hpp phonelibs/qpoases/** +phonelibs/qrcode/*.cc +phonelibs/qrcode/*.hpp + phonelibs/libyuv/include/** phonelibs/libyuv/lib/** diff --git a/selfdrive/ui/SConscript b/selfdrive/ui/SConscript index 1c532837bb..a19fe1ee41 100644 --- a/selfdrive/ui/SConscript +++ b/selfdrive/ui/SConscript @@ -19,7 +19,7 @@ else: widgets = qt_env.Library("qt_widgets", ["qt/qt_window.cc", "qt/qt_sound.cc", "qt/widgets/keyboard.cc", "qt/widgets/input_field.cc", "qt/widgets/drive_stats.cc", - "qt/offroad/wifi.cc", "qt/offroad/wifiManager.cc", "qt/widgets/toggle.cc", "qt/widgets/offroad_alerts.cc", "qt/widgets/setup.cc", "qt/widgets/QrCode.cc"], + "qt/offroad/wifi.cc", "qt/offroad/wifiManager.cc", "qt/widgets/toggle.cc", "qt/widgets/offroad_alerts.cc", "qt/widgets/setup.cc"], LIBS=qt_libs) qt_libs.append(widgets) @@ -29,8 +29,7 @@ else: del qt_libs[qt_libs.index('OpenCL')] qt_env['FRAMEWORKS'] += ['OpenCL'] - qt_src = ["qt/ui.cc", "qt/window.cc", "qt/home.cc", "qt/api.cc", "qt/offroad/settings.cc", "qt/offroad/onboarding.cc"] + src - + qt_src = ["qt/ui.cc", "qt/window.cc", "qt/home.cc", "qt/api.cc", "qt/offroad/settings.cc", "qt/offroad/onboarding.cc", "#phonelibs/qrcode/QrCode.cc"] + src qt_env.Program("_ui", qt_src, LIBS=qt_libs) # spinner and text window diff --git a/selfdrive/ui/qt/widgets/QrCode.cc b/selfdrive/ui/qt/widgets/QrCode.cc deleted file mode 100644 index d248b2d8e0..0000000000 --- a/selfdrive/ui/qt/widgets/QrCode.cc +++ /dev/null @@ -1,862 +0,0 @@ -/* - * QR Code generator library (C++) - * - * Copyright (c) Project Nayuki. (MIT License) - * https://www.nayuki.io/page/qr-code-generator-library - * - * Permission is hereby granted, free of charge, to any person obtaining a copy of - * this software and associated documentation files (the "Software"), to deal in - * the Software without restriction, including without limitation the rights to - * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of - * the Software, and to permit persons to whom the Software is furnished to do so, - * subject to the following conditions: - * - The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - The Software is provided "as is", without warranty of any kind, express or - * implied, including but not limited to the warranties of merchantability, - * fitness for a particular purpose and noninfringement. In no event shall the - * authors or copyright holders be liable for any claim, damages or other - * liability, whether in an action of contract, tort or otherwise, arising from, - * out of or in connection with the Software or the use or other dealings in the - * Software. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include "QrCode.hpp" - -using std::int8_t; -using std::uint8_t; -using std::size_t; -using std::vector; - - -namespace qrcodegen { - -QrSegment::Mode::Mode(int mode, int cc0, int cc1, int cc2) : - modeBits(mode) { - numBitsCharCount[0] = cc0; - numBitsCharCount[1] = cc1; - numBitsCharCount[2] = cc2; -} - - -int QrSegment::Mode::getModeBits() const { - return modeBits; -} - - -int QrSegment::Mode::numCharCountBits(int ver) const { - return numBitsCharCount[(ver + 7) / 17]; -} - - -const QrSegment::Mode QrSegment::Mode::NUMERIC (0x1, 10, 12, 14); -const QrSegment::Mode QrSegment::Mode::ALPHANUMERIC(0x2, 9, 11, 13); -const QrSegment::Mode QrSegment::Mode::BYTE (0x4, 8, 16, 16); -const QrSegment::Mode QrSegment::Mode::KANJI (0x8, 8, 10, 12); -const QrSegment::Mode QrSegment::Mode::ECI (0x7, 0, 0, 0); - - -QrSegment QrSegment::makeBytes(const vector &data) { - if (data.size() > static_cast(INT_MAX)) - throw std::length_error("Data too long"); - BitBuffer bb; - for (uint8_t b : data) - bb.appendBits(b, 8); - return QrSegment(Mode::BYTE, static_cast(data.size()), std::move(bb)); -} - - -QrSegment QrSegment::makeNumeric(const char *digits) { - BitBuffer bb; - int accumData = 0; - int accumCount = 0; - int charCount = 0; - for (; *digits != '\0'; digits++, charCount++) { - char c = *digits; - if (c < '0' || c > '9') - throw std::domain_error("String contains non-numeric characters"); - accumData = accumData * 10 + (c - '0'); - accumCount++; - if (accumCount == 3) { - bb.appendBits(static_cast(accumData), 10); - accumData = 0; - accumCount = 0; - } - } - if (accumCount > 0) // 1 or 2 digits remaining - bb.appendBits(static_cast(accumData), accumCount * 3 + 1); - return QrSegment(Mode::NUMERIC, charCount, std::move(bb)); -} - - -QrSegment QrSegment::makeAlphanumeric(const char *text) { - BitBuffer bb; - int accumData = 0; - int accumCount = 0; - int charCount = 0; - for (; *text != '\0'; text++, charCount++) { - const char *temp = std::strchr(ALPHANUMERIC_CHARSET, *text); - if (temp == nullptr) - throw std::domain_error("String contains unencodable characters in alphanumeric mode"); - accumData = accumData * 45 + static_cast(temp - ALPHANUMERIC_CHARSET); - accumCount++; - if (accumCount == 2) { - bb.appendBits(static_cast(accumData), 11); - accumData = 0; - accumCount = 0; - } - } - if (accumCount > 0) // 1 character remaining - bb.appendBits(static_cast(accumData), 6); - return QrSegment(Mode::ALPHANUMERIC, charCount, std::move(bb)); -} - - -vector QrSegment::makeSegments(const char *text) { - // Select the most efficient segment encoding automatically - vector result; - if (*text == '\0'); // Leave result empty - else if (isNumeric(text)) - result.push_back(makeNumeric(text)); - else if (isAlphanumeric(text)) - result.push_back(makeAlphanumeric(text)); - else { - vector bytes; - for (; *text != '\0'; text++) - bytes.push_back(static_cast(*text)); - result.push_back(makeBytes(bytes)); - } - return result; -} - - -QrSegment QrSegment::makeEci(long assignVal) { - BitBuffer bb; - if (assignVal < 0) - throw std::domain_error("ECI assignment value out of range"); - else if (assignVal < (1 << 7)) - bb.appendBits(static_cast(assignVal), 8); - else if (assignVal < (1 << 14)) { - bb.appendBits(2, 2); - bb.appendBits(static_cast(assignVal), 14); - } else if (assignVal < 1000000L) { - bb.appendBits(6, 3); - bb.appendBits(static_cast(assignVal), 21); - } else - throw std::domain_error("ECI assignment value out of range"); - return QrSegment(Mode::ECI, 0, std::move(bb)); -} - - -QrSegment::QrSegment(Mode md, int numCh, const std::vector &dt) : - mode(md), - numChars(numCh), - data(dt) { - if (numCh < 0) - throw std::domain_error("Invalid value"); -} - - -QrSegment::QrSegment(Mode md, int numCh, std::vector &&dt) : - mode(md), - numChars(numCh), - data(std::move(dt)) { - if (numCh < 0) - throw std::domain_error("Invalid value"); -} - - -int QrSegment::getTotalBits(const vector &segs, int version) { - int result = 0; - for (const QrSegment &seg : segs) { - int ccbits = seg.mode.numCharCountBits(version); - if (seg.numChars >= (1L << ccbits)) - return -1; // The segment's length doesn't fit the field's bit width - if (4 + ccbits > INT_MAX - result) - return -1; // The sum will overflow an int type - result += 4 + ccbits; - if (seg.data.size() > static_cast(INT_MAX - result)) - return -1; // The sum will overflow an int type - result += static_cast(seg.data.size()); - } - return result; -} - - -bool QrSegment::isAlphanumeric(const char *text) { - for (; *text != '\0'; text++) { - if (std::strchr(ALPHANUMERIC_CHARSET, *text) == nullptr) - return false; - } - return true; -} - - -bool QrSegment::isNumeric(const char *text) { - for (; *text != '\0'; text++) { - char c = *text; - if (c < '0' || c > '9') - return false; - } - return true; -} - - -QrSegment::Mode QrSegment::getMode() const { - return mode; -} - - -int QrSegment::getNumChars() const { - return numChars; -} - - -const std::vector &QrSegment::getData() const { - return data; -} - - -const char *QrSegment::ALPHANUMERIC_CHARSET = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:"; - - - -int QrCode::getFormatBits(Ecc ecl) { - switch (ecl) { - case Ecc::LOW : return 1; - case Ecc::MEDIUM : return 0; - case Ecc::QUARTILE: return 3; - case Ecc::HIGH : return 2; - default: throw std::logic_error("Assertion error"); - } -} - - -QrCode QrCode::encodeText(const char *text, Ecc ecl) { - vector segs = QrSegment::makeSegments(text); - return encodeSegments(segs, ecl); -} - - -QrCode QrCode::encodeBinary(const vector &data, Ecc ecl) { - vector segs{QrSegment::makeBytes(data)}; - return encodeSegments(segs, ecl); -} - - -QrCode QrCode::encodeSegments(const vector &segs, Ecc ecl, - int minVersion, int maxVersion, int mask, bool boostEcl) { - if (!(MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= MAX_VERSION) || mask < -1 || mask > 7) - throw std::invalid_argument("Invalid value"); - - // Find the minimal version number to use - int version, dataUsedBits; - for (version = minVersion; ; version++) { - int dataCapacityBits = getNumDataCodewords(version, ecl) * 8; // Number of data bits available - dataUsedBits = QrSegment::getTotalBits(segs, version); - if (dataUsedBits != -1 && dataUsedBits <= dataCapacityBits) - break; // This version number is found to be suitable - if (version >= maxVersion) { // All versions in the range could not fit the given data - std::ostringstream sb; - if (dataUsedBits == -1) - sb << "Segment too long"; - else { - sb << "Data length = " << dataUsedBits << " bits, "; - sb << "Max capacity = " << dataCapacityBits << " bits"; - } - throw data_too_long(sb.str()); - } - } - if (dataUsedBits == -1) - throw std::logic_error("Assertion error"); - - // Increase the error correction level while the data still fits in the current version number - for (Ecc newEcl : vector{Ecc::MEDIUM, Ecc::QUARTILE, Ecc::HIGH}) { // From low to high - if (boostEcl && dataUsedBits <= getNumDataCodewords(version, newEcl) * 8) - ecl = newEcl; - } - - // Concatenate all segments to create the data bit string - BitBuffer bb; - for (const QrSegment &seg : segs) { - bb.appendBits(static_cast(seg.getMode().getModeBits()), 4); - bb.appendBits(static_cast(seg.getNumChars()), seg.getMode().numCharCountBits(version)); - bb.insert(bb.end(), seg.getData().begin(), seg.getData().end()); - } - if (bb.size() != static_cast(dataUsedBits)) - throw std::logic_error("Assertion error"); - - // Add terminator and pad up to a byte if applicable - size_t dataCapacityBits = static_cast(getNumDataCodewords(version, ecl)) * 8; - if (bb.size() > dataCapacityBits) - throw std::logic_error("Assertion error"); - bb.appendBits(0, std::min(4, static_cast(dataCapacityBits - bb.size()))); - bb.appendBits(0, (8 - static_cast(bb.size() % 8)) % 8); - if (bb.size() % 8 != 0) - throw std::logic_error("Assertion error"); - - // Pad with alternating bytes until data capacity is reached - for (uint8_t padByte = 0xEC; bb.size() < dataCapacityBits; padByte ^= 0xEC ^ 0x11) - bb.appendBits(padByte, 8); - - // Pack bits into bytes in big endian - vector dataCodewords(bb.size() / 8); - for (size_t i = 0; i < bb.size(); i++) - dataCodewords[i >> 3] |= (bb.at(i) ? 1 : 0) << (7 - (i & 7)); - - // Create the QR Code object - return QrCode(version, ecl, dataCodewords, mask); -} - - -QrCode::QrCode(int ver, Ecc ecl, const vector &dataCodewords, int msk) : - // Initialize fields and check arguments - version(ver), - errorCorrectionLevel(ecl) { - if (ver < MIN_VERSION || ver > MAX_VERSION) - throw std::domain_error("Version value out of range"); - if (msk < -1 || msk > 7) - throw std::domain_error("Mask value out of range"); - size = ver * 4 + 17; - size_t sz = static_cast(size); - modules = vector >(sz, vector(sz)); // Initially all white - isFunction = vector >(sz, vector(sz)); - - // Compute ECC, draw modules - drawFunctionPatterns(); - const vector allCodewords = addEccAndInterleave(dataCodewords); - drawCodewords(allCodewords); - - // Do masking - if (msk == -1) { // Automatically choose best mask - long minPenalty = LONG_MAX; - for (int i = 0; i < 8; i++) { - applyMask(i); - drawFormatBits(i); - long penalty = getPenaltyScore(); - if (penalty < minPenalty) { - msk = i; - minPenalty = penalty; - } - applyMask(i); // Undoes the mask due to XOR - } - } - if (msk < 0 || msk > 7)//lgtm [cpp/constant-comparison] - throw std::logic_error("Assertion error"); - this->mask = msk; - applyMask(msk); // Apply the final choice of mask - drawFormatBits(msk); // Overwrite old format bits - - isFunction.clear(); - isFunction.shrink_to_fit(); -} - - -int QrCode::getVersion() const { - return version; -} - - -int QrCode::getSize() const { - return size; -} - - -QrCode::Ecc QrCode::getErrorCorrectionLevel() const { - return errorCorrectionLevel; -} - - -int QrCode::getMask() const { - return mask; -} - - -bool QrCode::getModule(int x, int y) const { - return 0 <= x && x < size && 0 <= y && y < size && module(x, y); -} - - -std::string QrCode::toSvgString(int border) const { - if (border < 0) - throw std::domain_error("Border must be non-negative"); - if (border > INT_MAX / 2 || border * 2 > INT_MAX - size) - throw std::overflow_error("Border too large"); - - std::ostringstream sb; - sb << "\n"; - sb << "\n"; - sb << "\n"; - sb << "\t\n"; - sb << "\t\n"; - sb << "\n"; - return sb.str(); -} - - -void QrCode::drawFunctionPatterns() { - // Draw horizontal and vertical timing patterns - for (int i = 0; i < size; i++) { - setFunctionModule(6, i, i % 2 == 0); - setFunctionModule(i, 6, i % 2 == 0); - } - - // Draw 3 finder patterns (all corners except bottom right; overwrites some timing modules) - drawFinderPattern(3, 3); - drawFinderPattern(size - 4, 3); - drawFinderPattern(3, size - 4); - - // Draw numerous alignment patterns - const vector alignPatPos = getAlignmentPatternPositions(); - size_t numAlign = alignPatPos.size(); - for (size_t i = 0; i < numAlign; i++) { - for (size_t j = 0; j < numAlign; j++) { - // Don't draw on the three finder corners - if (!((i == 0 && j == 0) || (i == 0 && j == numAlign - 1) || (i == numAlign - 1 && j == 0))) - drawAlignmentPattern(alignPatPos.at(i), alignPatPos.at(j)); - } - } - - // Draw configuration data - drawFormatBits(0); // Dummy mask value; overwritten later in the constructor - drawVersion(); -} - - -void QrCode::drawFormatBits(int msk) { - // Calculate error correction code and pack bits - int data = getFormatBits(errorCorrectionLevel) << 3 | msk; // errCorrLvl is uint2, msk is uint3 - int rem = data; - for (int i = 0; i < 10; i++) - rem = (rem << 1) ^ ((rem >> 9) * 0x537); - int bits = (data << 10 | rem) ^ 0x5412; // uint15 - if (bits >> 15 != 0) - throw std::logic_error("Assertion error"); - - // Draw first copy - for (int i = 0; i <= 5; i++) - setFunctionModule(8, i, getBit(bits, i)); - setFunctionModule(8, 7, getBit(bits, 6)); - setFunctionModule(8, 8, getBit(bits, 7)); - setFunctionModule(7, 8, getBit(bits, 8)); - for (int i = 9; i < 15; i++) - setFunctionModule(14 - i, 8, getBit(bits, i)); - - // Draw second copy - for (int i = 0; i < 8; i++) - setFunctionModule(size - 1 - i, 8, getBit(bits, i)); - for (int i = 8; i < 15; i++) - setFunctionModule(8, size - 15 + i, getBit(bits, i)); - setFunctionModule(8, size - 8, true); // Always black -} - - -void QrCode::drawVersion() { - if (version < 7) - return; - - // Calculate error correction code and pack bits - int rem = version; // version is uint6, in the range [7, 40] - for (int i = 0; i < 12; i++) - rem = (rem << 1) ^ ((rem >> 11) * 0x1F25); - long bits = static_cast(version) << 12 | rem; // uint18 - if (bits >> 18 != 0) - throw std::logic_error("Assertion error"); - - // Draw two copies - for (int i = 0; i < 18; i++) { - bool bit = getBit(bits, i); - int a = size - 11 + i % 3; - int b = i / 3; - setFunctionModule(a, b, bit); - setFunctionModule(b, a, bit); - } -} - - -void QrCode::drawFinderPattern(int x, int y) { - for (int dy = -4; dy <= 4; dy++) { - for (int dx = -4; dx <= 4; dx++) { - int dist = std::max(std::abs(dx), std::abs(dy)); // Chebyshev/infinity norm - int xx = x + dx, yy = y + dy; - if (0 <= xx && xx < size && 0 <= yy && yy < size) - setFunctionModule(xx, yy, dist != 2 && dist != 4); - } - } -} - - -void QrCode::drawAlignmentPattern(int x, int y) { - for (int dy = -2; dy <= 2; dy++) { - for (int dx = -2; dx <= 2; dx++) - setFunctionModule(x + dx, y + dy, std::max(std::abs(dx), std::abs(dy)) != 1); - } -} - - -void QrCode::setFunctionModule(int x, int y, bool isBlack) { - size_t ux = static_cast(x); - size_t uy = static_cast(y); - modules .at(uy).at(ux) = isBlack; - isFunction.at(uy).at(ux) = true; -} - - -bool QrCode::module(int x, int y) const { - return modules.at(static_cast(y)).at(static_cast(x)); -} - - -vector QrCode::addEccAndInterleave(const vector &data) const { - if (data.size() != static_cast(getNumDataCodewords(version, errorCorrectionLevel))) - throw std::invalid_argument("Invalid argument"); - - // Calculate parameter numbers - int numBlocks = NUM_ERROR_CORRECTION_BLOCKS[static_cast(errorCorrectionLevel)][version]; - int blockEccLen = ECC_CODEWORDS_PER_BLOCK [static_cast(errorCorrectionLevel)][version]; - int rawCodewords = getNumRawDataModules(version) / 8; - int numShortBlocks = numBlocks - rawCodewords % numBlocks; - int shortBlockLen = rawCodewords / numBlocks; - - // Split data into blocks and append ECC to each block - vector > blocks; - const vector rsDiv = reedSolomonComputeDivisor(blockEccLen); - for (int i = 0, k = 0; i < numBlocks; i++) { - vector dat(data.cbegin() + k, data.cbegin() + (k + shortBlockLen - blockEccLen + (i < numShortBlocks ? 0 : 1))); - k += static_cast(dat.size()); - const vector ecc = reedSolomonComputeRemainder(dat, rsDiv); - if (i < numShortBlocks) - dat.push_back(0); - dat.insert(dat.end(), ecc.cbegin(), ecc.cend()); - blocks.push_back(std::move(dat)); - } - - // Interleave (not concatenate) the bytes from every block into a single sequence - vector result; - for (size_t i = 0; i < blocks.at(0).size(); i++) { - for (size_t j = 0; j < blocks.size(); j++) { - // Skip the padding byte in short blocks - if (i != static_cast(shortBlockLen - blockEccLen) || j >= static_cast(numShortBlocks)) - result.push_back(blocks.at(j).at(i)); - } - } - if (result.size() != static_cast(rawCodewords)) - throw std::logic_error("Assertion error"); - return result; -} - - -void QrCode::drawCodewords(const vector &data) { - if (data.size() != static_cast(getNumRawDataModules(version) / 8)) - throw std::invalid_argument("Invalid argument"); - - size_t i = 0; // Bit index into the data - // Do the funny zigzag scan - for (int right = size - 1; right >= 1; right -= 2) { // Index of right column in each column pair - if (right == 6) - right = 5; - for (int vert = 0; vert < size; vert++) { // Vertical counter - for (int j = 0; j < 2; j++) { - size_t x = static_cast(right - j); // Actual x coordinate - bool upward = ((right + 1) & 2) == 0; - size_t y = static_cast(upward ? size - 1 - vert : vert); // Actual y coordinate - if (!isFunction.at(y).at(x) && i < data.size() * 8) { - modules.at(y).at(x) = getBit(data.at(i >> 3), 7 - static_cast(i & 7)); - i++; - } - // If this QR Code has any remainder bits (0 to 7), they were assigned as - // 0/false/white by the constructor and are left unchanged by this method - } - } - } - if (i != data.size() * 8) - throw std::logic_error("Assertion error"); -} - - -void QrCode::applyMask(int msk) { - if (msk < 0 || msk > 7) - throw std::domain_error("Mask value out of range"); - size_t sz = static_cast(size); - for (size_t y = 0; y < sz; y++) { - for (size_t x = 0; x < sz; x++) { - bool invert; - switch (msk) { - case 0: invert = (x + y) % 2 == 0; break; - case 1: invert = y % 2 == 0; break; - case 2: invert = x % 3 == 0; break; - case 3: invert = (x + y) % 3 == 0; break; - case 4: invert = (x / 3 + y / 2) % 2 == 0; break; - case 5: invert = x * y % 2 + x * y % 3 == 0; break; - case 6: invert = (x * y % 2 + x * y % 3) % 2 == 0; break; - case 7: invert = ((x + y) % 2 + x * y % 3) % 2 == 0; break; - default: throw std::logic_error("Assertion error"); - } - modules.at(y).at(x) = modules.at(y).at(x) ^ (invert & !isFunction.at(y).at(x)); - } - } -} - - -long QrCode::getPenaltyScore() const { - long result = 0; - - // Adjacent modules in row having same color, and finder-like patterns - for (int y = 0; y < size; y++) { - bool runColor = false; - int runX = 0; - std::array runHistory = {}; - for (int x = 0; x < size; x++) { - if (module(x, y) == runColor) { - runX++; - if (runX == 5) - result += PENALTY_N1; - else if (runX > 5) - result++; - } else { - finderPenaltyAddHistory(runX, runHistory); - if (!runColor) - result += finderPenaltyCountPatterns(runHistory) * PENALTY_N3;//lgtm [cpp/integer-multiplication-cast-to-long] - runColor = module(x, y); - runX = 1; - } - } - result += finderPenaltyTerminateAndCount(runColor, runX, runHistory) * PENALTY_N3;//lgtm [cpp/integer-multiplication-cast-to-long] - } - // Adjacent modules in column having same color, and finder-like patterns - for (int x = 0; x < size; x++) { - bool runColor = false; - int runY = 0; - std::array runHistory = {}; - for (int y = 0; y < size; y++) { - if (module(x, y) == runColor) { - runY++; - if (runY == 5) - result += PENALTY_N1; - else if (runY > 5) - result++; - } else { - finderPenaltyAddHistory(runY, runHistory); - if (!runColor) - result += finderPenaltyCountPatterns(runHistory) * PENALTY_N3;//lgtm [cpp/integer-multiplication-cast-to-long] - runColor = module(x, y); - runY = 1; - } - } - result += finderPenaltyTerminateAndCount(runColor, runY, runHistory) * PENALTY_N3;//lgtm [cpp/integer-multiplication-cast-to-long] - } - - // 2*2 blocks of modules having same color - for (int y = 0; y < size - 1; y++) { - for (int x = 0; x < size - 1; x++) { - bool color = module(x, y); - if ( color == module(x + 1, y) && - color == module(x, y + 1) && - color == module(x + 1, y + 1)) - result += PENALTY_N2; - } - } - - // Balance of black and white modules - int black = 0; - for (const vector &row : modules) { - for (bool color : row) { - if (color) - black++; - } - } - int total = size * size; // Note that size is odd, so black/total != 1/2 - // Compute the smallest integer k >= 0 such that (45-5k)% <= black/total <= (55+5k)% - int k = static_cast((std::abs(black * 20L - total * 10L) + total - 1) / total) - 1; - result += k * PENALTY_N4; - return result; -} - - -vector QrCode::getAlignmentPatternPositions() const { - if (version == 1) - return vector(); - else { - int numAlign = version / 7 + 2; - int step = (version == 32) ? 26 : - (version*4 + numAlign*2 + 1) / (numAlign*2 - 2) * 2; - vector result; - for (int i = 0, pos = size - 7; i < numAlign - 1; i++, pos -= step) - result.insert(result.begin(), pos); - result.insert(result.begin(), 6); - return result; - } -} - - -int QrCode::getNumRawDataModules(int ver) { - if (ver < MIN_VERSION || ver > MAX_VERSION) - throw std::domain_error("Version number out of range"); - int result = (16 * ver + 128) * ver + 64; - if (ver >= 2) { - int numAlign = ver / 7 + 2; - result -= (25 * numAlign - 10) * numAlign - 55; - if (ver >= 7) - result -= 36; - } - if (!(208 <= result && result <= 29648)) - throw std::logic_error("Assertion error"); - return result; -} - - -int QrCode::getNumDataCodewords(int ver, Ecc ecl) { - return getNumRawDataModules(ver) / 8 - - ECC_CODEWORDS_PER_BLOCK [static_cast(ecl)][ver] - * NUM_ERROR_CORRECTION_BLOCKS[static_cast(ecl)][ver]; -} - - -vector QrCode::reedSolomonComputeDivisor(int degree) { - if (degree < 1 || degree > 255) - throw std::domain_error("Degree out of range"); - // Polynomial coefficients are stored from highest to lowest power, excluding the leading term which is always 1. - // For example the polynomial x^3 + 255x^2 + 8x + 93 is stored as the uint8 array {255, 8, 93}. - vector result(static_cast(degree)); - result.at(result.size() - 1) = 1; // Start off with the monomial x^0 - - // Compute the product polynomial (x - r^0) * (x - r^1) * (x - r^2) * ... * (x - r^{degree-1}), - // and drop the highest monomial term which is always 1x^degree. - // Note that r = 0x02, which is a generator element of this field GF(2^8/0x11D). - uint8_t root = 1; - for (int i = 0; i < degree; i++) { - // Multiply the current product by (x - r^i) - for (size_t j = 0; j < result.size(); j++) { - result.at(j) = reedSolomonMultiply(result.at(j), root); - if (j + 1 < result.size()) - result.at(j) ^= result.at(j + 1); - } - root = reedSolomonMultiply(root, 0x02); - } - return result; -} - - -vector QrCode::reedSolomonComputeRemainder(const vector &data, const vector &divisor) { - vector result(divisor.size()); - for (uint8_t b : data) { // Polynomial division - uint8_t factor = b ^ result.at(0); - result.erase(result.begin()); - result.push_back(0); - for (size_t i = 0; i < result.size(); i++) - result.at(i) ^= reedSolomonMultiply(divisor.at(i), factor); - } - return result; -} - - -uint8_t QrCode::reedSolomonMultiply(uint8_t x, uint8_t y) { - // Russian peasant multiplication - int z = 0; - for (int i = 7; i >= 0; i--) { - z = (z << 1) ^ ((z >> 7) * 0x11D); - z ^= ((y >> i) & 1) * x; - } - if (z >> 8 != 0) - throw std::logic_error("Assertion error"); - return static_cast(z); -} - - -int QrCode::finderPenaltyCountPatterns(const std::array &runHistory) const { - int n = runHistory.at(1); - if (n > size * 3) - throw std::logic_error("Assertion error"); - bool core = n > 0 && runHistory.at(2) == n && runHistory.at(3) == n * 3 && runHistory.at(4) == n && runHistory.at(5) == n; - return (core && runHistory.at(0) >= n * 4 && runHistory.at(6) >= n ? 1 : 0) - + (core && runHistory.at(6) >= n * 4 && runHistory.at(0) >= n ? 1 : 0); -} - - -int QrCode::finderPenaltyTerminateAndCount(bool currentRunColor, int currentRunLength, std::array &runHistory) const { - if (currentRunColor) { // Terminate black run - finderPenaltyAddHistory(currentRunLength, runHistory); - currentRunLength = 0; - } - currentRunLength += size; // Add white border to final run - finderPenaltyAddHistory(currentRunLength, runHistory); - return finderPenaltyCountPatterns(runHistory); -} - - -void QrCode::finderPenaltyAddHistory(int currentRunLength, std::array &runHistory) const { - if (runHistory.at(0) == 0) - currentRunLength += size; // Add white border to initial run - std::copy_backward(runHistory.cbegin(), runHistory.cend() - 1, runHistory.end()); - runHistory.at(0) = currentRunLength; -} - - -bool QrCode::getBit(long x, int i) { - return ((x >> i) & 1) != 0; -} - - -/*---- Tables of constants ----*/ - -const int QrCode::PENALTY_N1 = 3; -const int QrCode::PENALTY_N2 = 3; -const int QrCode::PENALTY_N3 = 40; -const int QrCode::PENALTY_N4 = 10; - - -const int8_t QrCode::ECC_CODEWORDS_PER_BLOCK[4][41] = { - // Version: (note that index 0 is for padding, and is set to an illegal value) - //0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 Error correction level - {-1, 7, 10, 15, 20, 26, 18, 20, 24, 30, 18, 20, 24, 26, 30, 22, 24, 28, 30, 28, 28, 28, 28, 30, 30, 26, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30}, // Low - {-1, 10, 16, 26, 18, 24, 16, 18, 22, 22, 26, 30, 22, 22, 24, 24, 28, 28, 26, 26, 26, 26, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28}, // Medium - {-1, 13, 22, 18, 26, 18, 24, 18, 22, 20, 24, 28, 26, 24, 20, 30, 24, 28, 28, 26, 30, 28, 30, 30, 30, 30, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30}, // Quartile - {-1, 17, 28, 22, 16, 22, 28, 26, 26, 24, 28, 24, 28, 22, 24, 24, 30, 28, 28, 26, 28, 30, 24, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30}, // High -}; - -const int8_t QrCode::NUM_ERROR_CORRECTION_BLOCKS[4][41] = { - // Version: (note that index 0 is for padding, and is set to an illegal value) - //0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 Error correction level - {-1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 4, 4, 4, 4, 4, 6, 6, 6, 6, 7, 8, 8, 9, 9, 10, 12, 12, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, 24, 25}, // Low - {-1, 1, 1, 1, 2, 2, 4, 4, 4, 5, 5, 5, 8, 9, 9, 10, 10, 11, 13, 14, 16, 17, 17, 18, 20, 21, 23, 25, 26, 28, 29, 31, 33, 35, 37, 38, 40, 43, 45, 47, 49}, // Medium - {-1, 1, 1, 2, 2, 4, 4, 6, 6, 8, 8, 8, 10, 12, 16, 12, 17, 16, 18, 21, 20, 23, 23, 25, 27, 29, 34, 34, 35, 38, 40, 43, 45, 48, 51, 53, 56, 59, 62, 65, 68}, // Quartile - {-1, 1, 1, 2, 4, 4, 4, 5, 6, 8, 8, 11, 11, 16, 16, 18, 16, 19, 21, 25, 25, 25, 34, 30, 32, 35, 37, 40, 42, 45, 48, 51, 54, 57, 60, 63, 66, 70, 74, 77, 81}, // High -}; - - -data_too_long::data_too_long(const std::string &msg) : - std::length_error(msg) {} - - - -BitBuffer::BitBuffer() - : std::vector() {} - - -void BitBuffer::appendBits(std::uint32_t val, int len) { - if (len < 0 || len > 31 || val >> len != 0) - throw std::domain_error("Value out of range"); - for (int i = len - 1; i >= 0; i--) // Append bit by bit - this->push_back(((val >> i) & 1) != 0); -} - -} diff --git a/selfdrive/ui/qt/widgets/QrCode.hpp b/selfdrive/ui/qt/widgets/QrCode.hpp deleted file mode 100644 index 7341e41029..0000000000 --- a/selfdrive/ui/qt/widgets/QrCode.hpp +++ /dev/null @@ -1,556 +0,0 @@ -/* - * QR Code generator library (C++) - * - * Copyright (c) Project Nayuki. (MIT License) - * https://www.nayuki.io/page/qr-code-generator-library - * - * Permission is hereby granted, free of charge, to any person obtaining a copy of - * this software and associated documentation files (the "Software"), to deal in - * the Software without restriction, including without limitation the rights to - * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of - * the Software, and to permit persons to whom the Software is furnished to do so, - * subject to the following conditions: - * - The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - The Software is provided "as is", without warranty of any kind, express or - * implied, including but not limited to the warranties of merchantability, - * fitness for a particular purpose and noninfringement. In no event shall the - * authors or copyright holders be liable for any claim, damages or other - * liability, whether in an action of contract, tort or otherwise, arising from, - * out of or in connection with the Software or the use or other dealings in the - * Software. - */ - -#pragma once - -#include -#include -#include -#include -#include - - -namespace qrcodegen { - -/* - * A segment of character/binary/control data in a QR Code symbol. - * Instances of this class are immutable. - * The mid-level way to create a segment is to take the payload data - * and call a static factory function such as QrSegment::makeNumeric(). - * The low-level way to create a segment is to custom-make the bit buffer - * and call the QrSegment() constructor with appropriate values. - * This segment class imposes no length restrictions, but QR Codes have restrictions. - * Even in the most favorable conditions, a QR Code can only hold 7089 characters of data. - * Any segment longer than this is meaningless for the purpose of generating QR Codes. - */ -class QrSegment final { - - /*---- Public helper enumeration ----*/ - - /* - * Describes how a segment's data bits are interpreted. Immutable. - */ - public: class Mode final { - - /*-- Constants --*/ - - public: static const Mode NUMERIC; - public: static const Mode ALPHANUMERIC; - public: static const Mode BYTE; - public: static const Mode KANJI; - public: static const Mode ECI; - - - /*-- Fields --*/ - - // The mode indicator bits, which is a uint4 value (range 0 to 15). - private: int modeBits; - - // Number of character count bits for three different version ranges. - private: int numBitsCharCount[3]; - - - /*-- Constructor --*/ - - private: Mode(int mode, int cc0, int cc1, int cc2); - - - /*-- Methods --*/ - - /* - * (Package-private) Returns the mode indicator bits, which is an unsigned 4-bit value (range 0 to 15). - */ - public: int getModeBits() const; - - /* - * (Package-private) Returns the bit width of the character count field for a segment in - * this mode in a QR Code at the given version number. The result is in the range [0, 16]. - */ - public: int numCharCountBits(int ver) const; - - }; - - - - /*---- Static factory functions (mid level) ----*/ - - /* - * Returns a segment representing the given binary data encoded in - * byte mode. All input byte vectors are acceptable. Any text string - * can be converted to UTF-8 bytes and encoded as a byte mode segment. - */ - public: static QrSegment makeBytes(const std::vector &data); - - - /* - * Returns a segment representing the given string of decimal digits encoded in numeric mode. - */ - public: static QrSegment makeNumeric(const char *digits); - - - /* - * Returns a segment representing the given text string encoded in alphanumeric mode. - * The characters allowed are: 0 to 9, A to Z (uppercase only), space, - * dollar, percent, asterisk, plus, hyphen, period, slash, colon. - */ - public: static QrSegment makeAlphanumeric(const char *text); - - - /* - * Returns a list of zero or more segments to represent the given text string. The result - * may use various segment modes and switch modes to optimize the length of the bit stream. - */ - public: static std::vector makeSegments(const char *text); - - - /* - * Returns a segment representing an Extended Channel Interpretation - * (ECI) designator with the given assignment value. - */ - public: static QrSegment makeEci(long assignVal); - - - /*---- Public static helper functions ----*/ - - /* - * Tests whether the given string can be encoded as a segment in alphanumeric mode. - * A string is encodable iff each character is in the following set: 0 to 9, A to Z - * (uppercase only), space, dollar, percent, asterisk, plus, hyphen, period, slash, colon. - */ - public: static bool isAlphanumeric(const char *text); - - - /* - * Tests whether the given string can be encoded as a segment in numeric mode. - * A string is encodable iff each character is in the range 0 to 9. - */ - public: static bool isNumeric(const char *text); - - - - /*---- Instance fields ----*/ - - /* The mode indicator of this segment. Accessed through getMode(). */ - private: Mode mode; - - /* The length of this segment's unencoded data. Measured in characters for - * numeric/alphanumeric/kanji mode, bytes for byte mode, and 0 for ECI mode. - * Always zero or positive. Not the same as the data's bit length. - * Accessed through getNumChars(). */ - private: int numChars; - - /* The data bits of this segment. Accessed through getData(). */ - private: std::vector data; - - - /*---- Constructors (low level) ----*/ - - /* - * Creates a new QR Code segment with the given attributes and data. - * The character count (numCh) must agree with the mode and the bit buffer length, - * but the constraint isn't checked. The given bit buffer is copied and stored. - */ - public: QrSegment(Mode md, int numCh, const std::vector &dt); - - - /* - * Creates a new QR Code segment with the given parameters and data. - * The character count (numCh) must agree with the mode and the bit buffer length, - * but the constraint isn't checked. The given bit buffer is moved and stored. - */ - public: QrSegment(Mode md, int numCh, std::vector &&dt); - - - /*---- Methods ----*/ - - /* - * Returns the mode field of this segment. - */ - public: Mode getMode() const; - - - /* - * Returns the character count field of this segment. - */ - public: int getNumChars() const; - - - /* - * Returns the data bits of this segment. - */ - public: const std::vector &getData() const; - - - // (Package-private) Calculates the number of bits needed to encode the given segments at - // the given version. Returns a non-negative number if successful. Otherwise returns -1 if a - // segment has too many characters to fit its length field, or the total bits exceeds INT_MAX. - public: static int getTotalBits(const std::vector &segs, int version); - - - /*---- Private constant ----*/ - - /* The set of all legal characters in alphanumeric mode, where - * each character value maps to the index in the string. */ - private: static const char *ALPHANUMERIC_CHARSET; - -}; - - - -/* - * A QR Code symbol, which is a type of two-dimension barcode. - * Invented by Denso Wave and described in the ISO/IEC 18004 standard. - * Instances of this class represent an immutable square grid of black and white cells. - * The class provides static factory functions to create a QR Code from text or binary data. - * The class covers the QR Code Model 2 specification, supporting all versions (sizes) - * from 1 to 40, all 4 error correction levels, and 4 character encoding modes. - * - * Ways to create a QR Code object: - * - High level: Take the payload data and call QrCode::encodeText() or QrCode::encodeBinary(). - * - Mid level: Custom-make the list of segments and call QrCode::encodeSegments(). - * - Low level: Custom-make the array of data codeword bytes (including - * segment headers and final padding, excluding error correction codewords), - * supply the appropriate version number, and call the QrCode() constructor. - * (Note that all ways require supplying the desired error correction level.) - */ -class QrCode final { - - /*---- Public helper enumeration ----*/ - - /* - * The error correction level in a QR Code symbol. - */ - public: enum class Ecc { - LOW = 0 , // The QR Code can tolerate about 7% erroneous codewords - MEDIUM , // The QR Code can tolerate about 15% erroneous codewords - QUARTILE, // The QR Code can tolerate about 25% erroneous codewords - HIGH , // The QR Code can tolerate about 30% erroneous codewords - }; - - - // Returns a value in the range 0 to 3 (unsigned 2-bit integer). - private: static int getFormatBits(Ecc ecl); - - - - /*---- Static factory functions (high level) ----*/ - - /* - * Returns a QR Code representing the given Unicode text string at the given error correction level. - * As a conservative upper bound, this function is guaranteed to succeed for strings that have 2953 or fewer - * UTF-8 code units (not Unicode code points) if the low error correction level is used. The smallest possible - * QR Code version is automatically chosen for the output. The ECC level of the result may be higher than - * the ecl argument if it can be done without increasing the version. - */ - public: static QrCode encodeText(const char *text, Ecc ecl); - - - /* - * Returns a QR Code representing the given binary data at the given error correction level. - * This function always encodes using the binary segment mode, not any text mode. The maximum number of - * bytes allowed is 2953. The smallest possible QR Code version is automatically chosen for the output. - * The ECC level of the result may be higher than the ecl argument if it can be done without increasing the version. - */ - public: static QrCode encodeBinary(const std::vector &data, Ecc ecl); - - - /*---- Static factory functions (mid level) ----*/ - - /* - * Returns a QR Code representing the given segments with the given encoding parameters. - * The smallest possible QR Code version within the given range is automatically - * chosen for the output. Iff boostEcl is true, then the ECC level of the result - * may be higher than the ecl argument if it can be done without increasing the - * version. The mask number is either between 0 to 7 (inclusive) to force that - * mask, or -1 to automatically choose an appropriate mask (which may be slow). - * This function allows the user to create a custom sequence of segments that switches - * between modes (such as alphanumeric and byte) to encode text in less space. - * This is a mid-level API; the high-level API is encodeText() and encodeBinary(). - */ - public: static QrCode encodeSegments(const std::vector &segs, Ecc ecl, - int minVersion=1, int maxVersion=40, int mask=-1, bool boostEcl=true); // All optional parameters - - - - /*---- Instance fields ----*/ - - // Immutable scalar parameters: - - /* The version number of this QR Code, which is between 1 and 40 (inclusive). - * This determines the size of this barcode. */ - private: int version; - - /* The width and height of this QR Code, measured in modules, between - * 21 and 177 (inclusive). This is equal to version * 4 + 17. */ - private: int size; - - /* The error correction level used in this QR Code. */ - private: Ecc errorCorrectionLevel; - - /* The index of the mask pattern used in this QR Code, which is between 0 and 7 (inclusive). - * Even if a QR Code is created with automatic masking requested (mask = -1), - * the resulting object still has a mask value between 0 and 7. */ - private: int mask; - - // Private grids of modules/pixels, with dimensions of size*size: - - // The modules of this QR Code (false = white, true = black). - // Immutable after constructor finishes. Accessed through getModule(). - private: std::vector > modules; - - // Indicates function modules that are not subjected to masking. Discarded when constructor finishes. - private: std::vector > isFunction; - - - - /*---- Constructor (low level) ----*/ - - /* - * Creates a new QR Code with the given version number, - * error correction level, data codeword bytes, and mask number. - * This is a low-level API that most users should not use directly. - * A mid-level API is the encodeSegments() function. - */ - public: QrCode(int ver, Ecc ecl, const std::vector &dataCodewords, int msk); - - - - /*---- Public instance methods ----*/ - - /* - * Returns this QR Code's version, in the range [1, 40]. - */ - public: int getVersion() const; - - - /* - * Returns this QR Code's size, in the range [21, 177]. - */ - public: int getSize() const; - - - /* - * Returns this QR Code's error correction level. - */ - public: Ecc getErrorCorrectionLevel() const; - - - /* - * Returns this QR Code's mask, in the range [0, 7]. - */ - public: int getMask() const; - - - /* - * Returns the color of the module (pixel) at the given coordinates, which is false - * for white or true for black. The top left corner has the coordinates (x=0, y=0). - * If the given coordinates are out of bounds, then false (white) is returned. - */ - public: bool getModule(int x, int y) const; - - - /* - * Returns a string of SVG code for an image depicting this QR Code, with the given number - * of border modules. The string always uses Unix newlines (\n), regardless of the platform. - */ - public: std::string toSvgString(int border) const; - - - - /*---- Private helper methods for constructor: Drawing function modules ----*/ - - // Reads this object's version field, and draws and marks all function modules. - private: void drawFunctionPatterns(); - - - // Draws two copies of the format bits (with its own error correction code) - // based on the given mask and this object's error correction level field. - private: void drawFormatBits(int msk); - - - // Draws two copies of the version bits (with its own error correction code), - // based on this object's version field, iff 7 <= version <= 40. - private: void drawVersion(); - - - // Draws a 9*9 finder pattern including the border separator, - // with the center module at (x, y). Modules can be out of bounds. - private: void drawFinderPattern(int x, int y); - - - // Draws a 5*5 alignment pattern, with the center module - // at (x, y). All modules must be in bounds. - private: void drawAlignmentPattern(int x, int y); - - - // Sets the color of a module and marks it as a function module. - // Only used by the constructor. Coordinates must be in bounds. - private: void setFunctionModule(int x, int y, bool isBlack); - - - // Returns the color of the module at the given coordinates, which must be in range. - private: bool module(int x, int y) const; - - - /*---- Private helper methods for constructor: Codewords and masking ----*/ - - // Returns a new byte string representing the given data with the appropriate error correction - // codewords appended to it, based on this object's version and error correction level. - private: std::vector addEccAndInterleave(const std::vector &data) const; - - - // Draws the given sequence of 8-bit codewords (data and error correction) onto the entire - // data area of this QR Code. Function modules need to be marked off before this is called. - private: void drawCodewords(const std::vector &data); - - - // XORs the codeword modules in this QR Code with the given mask pattern. - // The function modules must be marked and the codeword bits must be drawn - // before masking. Due to the arithmetic of XOR, calling applyMask() with - // the same mask value a second time will undo the mask. A final well-formed - // QR Code needs exactly one (not zero, two, etc.) mask applied. - private: void applyMask(int msk); - - - // Calculates and returns the penalty score based on state of this QR Code's current modules. - // This is used by the automatic mask choice algorithm to find the mask pattern that yields the lowest score. - private: long getPenaltyScore() const; - - - - /*---- Private helper functions ----*/ - - // Returns an ascending list of positions of alignment patterns for this version number. - // Each position is in the range [0,177), and are used on both the x and y axes. - // This could be implemented as lookup table of 40 variable-length lists of unsigned bytes. - private: std::vector getAlignmentPatternPositions() const; - - - // Returns the number of data bits that can be stored in a QR Code of the given version number, after - // all function modules are excluded. This includes remainder bits, so it might not be a multiple of 8. - // The result is in the range [208, 29648]. This could be implemented as a 40-entry lookup table. - private: static int getNumRawDataModules(int ver); - - - // Returns the number of 8-bit data (i.e. not error correction) codewords contained in any - // QR Code of the given version number and error correction level, with remainder bits discarded. - // This stateless pure function could be implemented as a (40*4)-cell lookup table. - private: static int getNumDataCodewords(int ver, Ecc ecl); - - - // Returns a Reed-Solomon ECC generator polynomial for the given degree. This could be - // implemented as a lookup table over all possible parameter values, instead of as an algorithm. - private: static std::vector reedSolomonComputeDivisor(int degree); - - - // Returns the Reed-Solomon error correction codeword for the given data and divisor polynomials. - private: static std::vector reedSolomonComputeRemainder(const std::vector &data, const std::vector &divisor); - - - // Returns the product of the two given field elements modulo GF(2^8/0x11D). - // All inputs are valid. This could be implemented as a 256*256 lookup table. - private: static std::uint8_t reedSolomonMultiply(std::uint8_t x, std::uint8_t y); - - - // Can only be called immediately after a white run is added, and - // returns either 0, 1, or 2. A helper function for getPenaltyScore(). - private: int finderPenaltyCountPatterns(const std::array &runHistory) const; - - - // Must be called at the end of a line (row or column) of modules. A helper function for getPenaltyScore(). - private: int finderPenaltyTerminateAndCount(bool currentRunColor, int currentRunLength, std::array &runHistory) const; - - - // Pushes the given value to the front and drops the last value. A helper function for getPenaltyScore(). - private: void finderPenaltyAddHistory(int currentRunLength, std::array &runHistory) const; - - - // Returns true iff the i'th bit of x is set to 1. - private: static bool getBit(long x, int i); - - - /*---- Constants and tables ----*/ - - // The minimum version number supported in the QR Code Model 2 standard. - public: static constexpr int MIN_VERSION = 1; - - // The maximum version number supported in the QR Code Model 2 standard. - public: static constexpr int MAX_VERSION = 40; - - - // For use in getPenaltyScore(), when evaluating which mask is best. - private: static const int PENALTY_N1; - private: static const int PENALTY_N2; - private: static const int PENALTY_N3; - private: static const int PENALTY_N4; - - - private: static const std::int8_t ECC_CODEWORDS_PER_BLOCK[4][41]; - private: static const std::int8_t NUM_ERROR_CORRECTION_BLOCKS[4][41]; - -}; - - - -/*---- Public exception class ----*/ - -/* - * Thrown when the supplied data does not fit any QR Code version. Ways to handle this exception include: - * - Decrease the error correction level if it was greater than Ecc::LOW. - * - If the encodeSegments() function was called with a maxVersion argument, then increase - * it if it was less than QrCode::MAX_VERSION. (This advice does not apply to the other - * factory functions because they search all versions up to QrCode::MAX_VERSION.) - * - Split the text data into better or optimal segments in order to reduce the number of bits required. - * - Change the text or binary data to be shorter. - * - Change the text to fit the character set of a particular segment mode (e.g. alphanumeric). - * - Propagate the error upward to the caller/user. - */ -class data_too_long : public std::length_error { - - public: explicit data_too_long(const std::string &msg); - -}; - - - -/* - * An appendable sequence of bits (0s and 1s). Mainly used by QrSegment. - */ -class BitBuffer final : public std::vector { - - /*---- Constructor ----*/ - - // Creates an empty bit buffer (length 0). - public: BitBuffer(); - - - - /*---- Method ----*/ - - // Appends the given number of low-order bits of the given value - // to this buffer. Requires 0 <= len <= 31 and val < 2^len. - public: void appendBits(std::uint32_t val, int len); - -}; - -}