Mercurial > hgrepos > Python2 > PyMuPDF
view mupdf-source/thirdparty/zxing-cpp/wrappers/python/zxing.cpp @ 2:b50eed0cc0ef upstream
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
The directory name has changed: no version number in the expanded directory now.
| author | Franz Glasner <fzglas.hg@dom66.de> |
|---|---|
| date | Mon, 15 Sep 2025 11:43:07 +0200 |
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/* * Copyright 2019 Tim Rae * Copyright 2021 Antoine Humbert * Copyright 2021 Axel Waggershauser */ // SPDX-License-Identifier: Apache-2.0 #include "BarcodeFormat.h" // Reader #include "ReadBarcode.h" #include "ZXAlgorithms.h" // Writer #ifdef ZXING_EXPERIMENTAL_API #include "WriteBarcode.h" #else #include "BitMatrix.h" #include "Matrix.h" #include "MultiFormatWriter.h" #include <cstring> #endif #include <pybind11/pybind11.h> #include <pybind11/stl.h> #include <optional> #include <sstream> #include <vector> using namespace ZXing; namespace py = pybind11; using namespace pybind11::literals; // to bring in the `_a` literal std::ostream& operator<<(std::ostream& os, const Position& points) { for (const auto& p : points) os << p.x << "x" << p.y << " "; os.seekp(-1, os.cur); os << '\0'; return os; } auto read_barcodes_impl(py::object _image, const BarcodeFormats& formats, bool try_rotate, bool try_downscale, TextMode text_mode, Binarizer binarizer, bool is_pure, EanAddOnSymbol ean_add_on_symbol, bool return_errors, uint8_t max_number_of_symbols = 0xff) { const auto opts = ReaderOptions() .setFormats(formats) .setTryRotate(try_rotate) .setTryDownscale(try_downscale) .setTextMode(text_mode) .setBinarizer(binarizer) .setIsPure(is_pure) .setMaxNumberOfSymbols(max_number_of_symbols) .setEanAddOnSymbol(ean_add_on_symbol) .setReturnErrors(return_errors); const auto _type = std::string(py::str(py::type::of(_image))); py::buffer_info info; ImageFormat imgfmt = ImageFormat::None; try { if (py::hasattr(_image, "__array_interface__")) { if (_type.find("PIL.") != std::string::npos) { _image.attr("load")(); const auto mode = _image.attr("mode").cast<std::string>(); if (mode == "L") imgfmt = ImageFormat::Lum; else if (mode == "RGB") imgfmt = ImageFormat::RGB; else if (mode == "RGBA") imgfmt = ImageFormat::RGBA; else { // Unsupported mode in ImageFormat. Let's do conversion to L mode with PIL. _image = _image.attr("convert")("L"); imgfmt = ImageFormat::Lum; } } auto ai = _image.attr("__array_interface__").cast<py::dict>(); auto shape = ai["shape"].cast<std::vector<py::ssize_t>>(); auto typestr = ai["typestr"].cast<std::string>(); if (typestr != "|u1") throw py::type_error("Incompatible __array_interface__ data type (" + typestr + "): expected a uint8_t array (|u1)."); if (ai.contains("data")) { auto adata = ai["data"]; if (py::isinstance<py::buffer>(adata)) { // PIL and our own __array_interface__ passes data as a buffer/bytes object info = adata.cast<py::buffer>().request(); // PIL's bytes object has wrong dim/shape/strides info if (info.ndim != Size(shape)) { info.ndim = Size(shape); info.shape = shape; info.strides = py::detail::c_strides(shape, 1); } } else if (py::isinstance<py::tuple>(adata)) { // numpy data is passed as a tuple auto strides = py::detail::c_strides(shape, 1); if (ai.contains("strides") && !ai["strides"].is_none()) strides = ai["strides"].cast<std::vector<py::ssize_t>>(); auto data_ptr = reinterpret_cast<void*>(adata.cast<py::tuple>()[0].cast<py::size_t>()); info = py::buffer_info(data_ptr, 1, "B", Size(shape), shape, strides); } else { throw py::type_error("No way to get data from __array_interface__"); } } else { info = _image.cast<py::buffer>().request(); } } else { info = _image.cast<py::buffer>().request(); } #if PYBIND11_VERSION_HEX > 0x02080000 // py::raise_from is available starting from 2.8.0 } catch (py::error_already_set &e) { py::raise_from(e, PyExc_TypeError, ("Invalid input: " + _type + " does not support the buffer protocol.").c_str()); throw py::error_already_set(); #endif } catch (...) { throw py::type_error("Invalid input: " + _type + " does not support the buffer protocol."); } if (info.format != py::format_descriptor<uint8_t>::format()) throw py::type_error("Incompatible buffer format '" + info.format + "': expected a uint8_t array."); if (info.ndim != 2 && info.ndim != 3) throw py::type_error("Incompatible buffer dimension " + std::to_string(info.ndim) + " (needs to be 2 or 3)."); const auto height = narrow_cast<int>(info.shape[0]); const auto width = narrow_cast<int>(info.shape[1]); const auto channels = info.ndim == 2 ? 1 : narrow_cast<int>(info.shape[2]); const auto rowStride = narrow_cast<int>(info.strides[0]); const auto pixStride = narrow_cast<int>(info.strides[1]); if (imgfmt == ImageFormat::None) { // Assume grayscale or BGR image depending on channels number if (channels == 1) imgfmt = ImageFormat::Lum; else if (channels == 3) imgfmt = ImageFormat::BGR; else throw py::value_error("Unsupported number of channels for buffer: " + std::to_string(channels)); } const auto bytes = static_cast<uint8_t*>(info.ptr); // Disables the GIL during zxing processing (restored automatically upon completion) py::gil_scoped_release release; return ReadBarcodes({bytes, width, height, imgfmt, rowStride, pixStride}, opts); } std::optional<Barcode> read_barcode(py::object _image, const BarcodeFormats& formats, bool try_rotate, bool try_downscale, TextMode text_mode, Binarizer binarizer, bool is_pure, EanAddOnSymbol ean_add_on_symbol, bool return_errors) { auto res = read_barcodes_impl(_image, formats, try_rotate, try_downscale, text_mode, binarizer, is_pure, ean_add_on_symbol, return_errors, 1); return res.empty() ? std::nullopt : std::optional(res.front()); } Barcodes read_barcodes(py::object _image, const BarcodeFormats& formats, bool try_rotate, bool try_downscale, TextMode text_mode, Binarizer binarizer, bool is_pure, EanAddOnSymbol ean_add_on_symbol, bool return_errors) { return read_barcodes_impl(_image, formats, try_rotate, try_downscale, text_mode, binarizer, is_pure, ean_add_on_symbol, return_errors); } #ifdef ZXING_EXPERIMENTAL_API Barcode create_barcode(py::object content, BarcodeFormat format, std::string ec_level) { auto cOpts = CreatorOptions(format).ecLevel(ec_level); auto data = py::cast<std::string>(content); if (py::isinstance<py::str>(content)) return CreateBarcodeFromText(data, cOpts); else if (py::isinstance<py::bytes>(content)) return CreateBarcodeFromBytes(data, cOpts); else throw py::type_error("Invalid input: only 'str' and 'bytes' supported."); } Image write_barcode_to_image(Barcode barcode, int size_hint, bool with_hrt, bool with_quiet_zones) { return WriteBarcodeToImage(barcode, WriterOptions().sizeHint(size_hint).withHRT(with_hrt).withQuietZones(with_quiet_zones)); } std::string write_barcode_to_svg(Barcode barcode, int size_hint, bool with_hrt, bool with_quiet_zones) { return WriteBarcodeToSVG(barcode, WriterOptions().sizeHint(size_hint).withHRT(with_hrt).withQuietZones(with_quiet_zones)); } #endif Image write_barcode(BarcodeFormat format, py::object content, int width, int height, int quiet_zone, int ec_level) { #ifdef ZXING_EXPERIMENTAL_API auto barcode = create_barcode(content, format, std::to_string(ec_level)); return write_barcode_to_image(barcode, std::max(width, height), false, quiet_zone != 0); #else CharacterSet encoding [[maybe_unused]]; if (py::isinstance<py::str>(content)) encoding = CharacterSet::UTF8; else if (py::isinstance<py::bytes>(content)) encoding = CharacterSet::BINARY; else throw py::type_error("Invalid input: only 'str' and 'bytes' supported."); auto writer = MultiFormatWriter(format).setEncoding(encoding).setMargin(quiet_zone).setEccLevel(ec_level); auto bits = writer.encode(py::cast<std::string>(content), width, height); auto bitmap = ToMatrix<uint8_t>(bits); Image res(bitmap.width(), bitmap.height()); memcpy(const_cast<uint8_t*>(res.data()), bitmap.data(), bitmap.size()); return res; #endif } PYBIND11_MODULE(zxingcpp, m) { m.doc() = "python bindings for zxing-cpp"; // forward declaration of BarcodeFormats to fix BarcodeFormat function header typings // see https://github.com/zxing-cpp/zxing-cpp/pull/271 py::class_<BarcodeFormats> pyBarcodeFormats(m, "BarcodeFormats"); py::enum_<BarcodeFormat>(m, "BarcodeFormat", py::arithmetic{}, "Enumeration of zxing supported barcode formats") .value("Aztec", BarcodeFormat::Aztec) .value("Codabar", BarcodeFormat::Codabar) .value("Code39", BarcodeFormat::Code39) .value("Code93", BarcodeFormat::Code93) .value("Code128", BarcodeFormat::Code128) .value("DataMatrix", BarcodeFormat::DataMatrix) .value("EAN8", BarcodeFormat::EAN8) .value("EAN13", BarcodeFormat::EAN13) .value("ITF", BarcodeFormat::ITF) .value("MaxiCode", BarcodeFormat::MaxiCode) .value("PDF417", BarcodeFormat::PDF417) .value("QRCode", BarcodeFormat::QRCode) .value("MicroQRCode", BarcodeFormat::MicroQRCode) .value("RMQRCode", BarcodeFormat::RMQRCode) .value("DataBar", BarcodeFormat::DataBar) .value("DataBarExpanded", BarcodeFormat::DataBarExpanded) .value("DataBarLimited", BarcodeFormat::DataBarLimited) .value("DXFilmEdge", BarcodeFormat::DXFilmEdge) .value("UPCA", BarcodeFormat::UPCA) .value("UPCE", BarcodeFormat::UPCE) // use upper case 'NONE' because 'None' is a reserved identifier in python .value("NONE", BarcodeFormat::None) .value("LinearCodes", BarcodeFormat::LinearCodes) .value("MatrixCodes", BarcodeFormat::MatrixCodes) .export_values() // see https://github.com/pybind/pybind11/issues/2221 .def("__or__", [](BarcodeFormat f1, BarcodeFormat f2){ return f1 | f2; }); pyBarcodeFormats .def("__repr__", py::overload_cast<BarcodeFormats>(static_cast<std::string(*)(BarcodeFormats)>(ToString))) .def("__str__", py::overload_cast<BarcodeFormats>(static_cast<std::string(*)(BarcodeFormats)>(ToString))) .def("__eq__", [](BarcodeFormats f1, BarcodeFormats f2){ return f1 == f2; }) .def("__or__", [](BarcodeFormats fs, BarcodeFormat f){ return fs | f; }) .def(py::init<BarcodeFormat>()); py::implicitly_convertible<BarcodeFormat, BarcodeFormats>(); py::enum_<Binarizer>(m, "Binarizer", "Enumeration of binarizers used before decoding images") .value("BoolCast", Binarizer::BoolCast) .value("FixedThreshold", Binarizer::FixedThreshold) .value("GlobalHistogram", Binarizer::GlobalHistogram) .value("LocalAverage", Binarizer::LocalAverage) .export_values(); py::enum_<EanAddOnSymbol>(m, "EanAddOnSymbol", "Enumeration of options for EAN-2/5 add-on symbols check") .value("Ignore", EanAddOnSymbol::Ignore, "Ignore any Add-On symbol during read/scan") .value("Read", EanAddOnSymbol::Read, "Read EAN-2/EAN-5 Add-On symbol if found") .value("Require", EanAddOnSymbol::Require, "Require EAN-2/EAN-5 Add-On symbol to be present") .export_values(); py::enum_<ContentType>(m, "ContentType", "Enumeration of content types") .value("Text", ContentType::Text) .value("Binary", ContentType::Binary) .value("Mixed", ContentType::Mixed) .value("GS1", ContentType::GS1) .value("ISO15434", ContentType::ISO15434) .value("UnknownECI", ContentType::UnknownECI) .export_values(); py::enum_<TextMode>(m, "TextMode", "") .value("Plain", TextMode::Plain, "bytes() transcoded to unicode based on ECI info or guessed charset (the default mode prior to 2.0)") .value("ECI", TextMode::ECI, "standard content following the ECI protocol with every character set ECI segment transcoded to unicode") .value("HRI", TextMode::HRI, "Human Readable Interpretation (dependent on the ContentType)") .value("Hex", TextMode::Hex, "bytes() transcoded to ASCII string of HEX values") .value("Escaped", TextMode::Escaped, "Use the EscapeNonGraphical() function (e.g. ASCII 29 will be transcoded to '<GS>'") .export_values(); py::class_<PointI>(m, "Point", "Represents the coordinates of a point in an image") .def_readonly("x", &PointI::x, ":return: horizontal coordinate of the point\n" ":rtype: int") .def_readonly("y", &PointI::y, ":return: vertical coordinate of the point\n" ":rtype: int"); py::class_<Position>(m, "Position", "The position of a decoded symbol") .def_property_readonly("top_left", &Position::topLeft, ":return: coordinate of the symbol's top-left corner\n" ":rtype: zxingcpp.Point") .def_property_readonly("top_right", &Position::topRight, ":return: coordinate of the symbol's top-right corner\n" ":rtype: zxingcpp.Point") .def_property_readonly("bottom_left", &Position::bottomLeft, ":return: coordinate of the symbol's bottom-left corner\n" ":rtype: zxingcpp.Point") .def_property_readonly("bottom_right", &Position::bottomRight, ":return: coordinate of the symbol's bottom-right corner\n" ":rtype: zxingcpp.Point") .def("__str__", [](Position pos) { std::ostringstream oss; oss << pos; return oss.str(); }); py::enum_<Error::Type>(m, "ErrorType", "") .value("None", Error::Type::None, "No error") .value("Format", Error::Type::Format, "Data format error") .value("Checksum", Error::Type::Checksum, "Checksum error") .value("Unsupported", Error::Type::Unsupported, "Unsupported content error") .export_values(); py::class_<Error>(m, "Error", "Barcode reading error") .def_property_readonly("type", &Error::type, ":return: Error type\n" ":rtype: zxingcpp.ErrorType") .def_property_readonly("message", &Error::msg, ":return: Error message\n" ":rtype: str") .def("__str__", [](Error e) { return ToString(e); }); py::class_<Barcode>(m, "Barcode", "The Barcode class") .def_property_readonly("valid", &Barcode::isValid, ":return: whether or not barcode is valid (i.e. a symbol was found and decoded)\n" ":rtype: bool") .def_property_readonly("text", [](const Barcode& res) { return res.text(); }, ":return: text of the decoded symbol (see also TextMode parameter)\n" ":rtype: str") .def_property_readonly("bytes", [](const Barcode& res) { return py::bytes(res.bytes().asString()); }, ":return: uninterpreted bytes of the decoded symbol\n" ":rtype: bytes") .def_property_readonly("format", &Barcode::format, ":return: decoded symbol format\n" ":rtype: zxingcpp.BarcodeFormat") .def_property_readonly("symbology_identifier", &Barcode::symbologyIdentifier, ":return: decoded symbology idendifier\n" ":rtype: str") .def_property_readonly("ec_level", &Barcode::ecLevel, ":return: error correction level of the symbol (empty string if not applicable)\n" ":rtype: str") .def_property_readonly("content_type", &Barcode::contentType, ":return: content type of symbol\n" ":rtype: zxingcpp.ContentType") .def_property_readonly("position", &Barcode::position, ":return: position of the decoded symbol\n" ":rtype: zxingcpp.Position") .def_property_readonly("orientation", &Barcode::orientation, ":return: orientation (in degree) of the decoded symbol\n" ":rtype: int") .def_property_readonly( "error", [](const Barcode& res) { return res.error() ? std::optional(res.error()) : std::nullopt; }, ":return: Error code or None\n" ":rtype: zxingcpp.Error") #ifdef ZXING_EXPERIMENTAL_API .def("to_image", &write_barcode_to_image, py::arg("size_hint") = 0, py::arg("with_hrt") = false, py::arg("with_quiet_zones") = true) .def("to_svg", &write_barcode_to_svg, py::arg("size_hint") = 0, py::arg("with_hrt") = false, py::arg("with_quiet_zones") = true) #endif ; m.attr("Result") = m.attr("Barcode"); // alias to deprecated name for the Barcode class m.def("barcode_format_from_str", &BarcodeFormatFromString, py::arg("str"), "Convert string to BarcodeFormat\n\n" ":type str: str\n" ":param str: string representing barcode format\n" ":return: corresponding barcode format\n" ":rtype: zxingcpp.BarcodeFormat"); m.def("barcode_formats_from_str", &BarcodeFormatsFromString, py::arg("str"), "Convert string to BarcodeFormats\n\n" ":type str: str\n" ":param str: string representing a list of barcodes formats\n" ":return: corresponding barcode formats\n" ":rtype: zxingcpp.BarcodeFormats"); m.def("read_barcode", &read_barcode, py::arg("image"), py::arg("formats") = BarcodeFormats{}, py::arg("try_rotate") = true, py::arg("try_downscale") = true, py::arg("text_mode") = TextMode::HRI, py::arg("binarizer") = Binarizer::LocalAverage, py::arg("is_pure") = false, py::arg("ean_add_on_symbol") = EanAddOnSymbol::Ignore, py::arg("return_errors") = false, "Read (decode) a barcode from a numpy BGR or grayscale image array or from a PIL image.\n\n" ":type image: buffer|numpy.ndarray|PIL.Image.Image\n" ":param image: The image object to decode. The image can be either:\n" " - a buffer with the correct shape, use .cast on memory view to convert\n" " - a numpy array containing image either in grayscale (1 byte per pixel) or BGR mode (3 bytes per pixel)\n" " - a PIL Image\n" ":type formats: zxing.BarcodeFormat|zxing.BarcodeFormats\n" ":param formats: the format(s) to decode. If ``None``, decode all formats.\n" ":type try_rotate: bool\n" ":param try_rotate: if ``True`` (the default), decoder searches for barcodes in any direction; \n" " if ``False``, it will not search for 90° / 270° rotated barcodes.\n" ":type try_downscale: bool\n" ":param try_downscale: if ``True`` (the default), decoder also scans downscaled versions of the input; \n" " if ``False``, it will only search in the resolution provided.\n" ":type text_mode: zxing.TextMode\n" ":param text_mode: specifies the TextMode that governs how the raw bytes content is transcoded to text.\n" " Defaults to :py:attr:`zxing.TextMode.HRI`." ":type binarizer: zxing.Binarizer\n" ":param binarizer: the binarizer used to convert image before decoding barcodes.\n" " Defaults to :py:attr:`zxing.Binarizer.LocalAverage`." ":type is_pure: bool\n" ":param is_pure: Set to True if the input contains nothing but a perfectly aligned barcode (generated image).\n" " Speeds up detection in that case. Default is False." ":type ean_add_on_symbol: zxing.EanAddOnSymbol\n" ":param ean_add_on_symbol: Specify whether to Ignore, Read or Require EAN-2/5 add-on symbols while scanning \n" " EAN/UPC codes. Default is ``Ignore``.\n" ":type return_errors: bool\n" ":param return_errors: Set to True to return the barcodes with errors as well (e.g. checksum errors); see ``Barcode.error``.\n" " Default is False." ":rtype: zxingcpp.Barcode\n" ":return: a Barcode if found, None otherwise" ); m.def("read_barcodes", &read_barcodes, py::arg("image"), py::arg("formats") = BarcodeFormats{}, py::arg("try_rotate") = true, py::arg("try_downscale") = true, py::arg("text_mode") = TextMode::HRI, py::arg("binarizer") = Binarizer::LocalAverage, py::arg("is_pure") = false, py::arg("ean_add_on_symbol") = EanAddOnSymbol::Ignore, py::arg("return_errors") = false, "Read (decode) multiple barcodes from a numpy BGR or grayscale image array or from a PIL image.\n\n" ":type image: buffer|numpy.ndarray|PIL.Image.Image\n" ":param image: The image object to decode. The image can be either:\n" " - a buffer with the correct shape, use .cast on memory view to convert\n" " - a numpy array containing image either in grayscale (1 byte per pixel) or BGR mode (3 bytes per pixel)\n" " - a PIL Image\n" ":type formats: zxing.BarcodeFormat|zxing.BarcodeFormats\n" ":param formats: the format(s) to decode. If ``None``, decode all formats.\n" ":type try_rotate: bool\n" ":param try_rotate: if ``True`` (the default), decoder searches for barcodes in any direction; \n" " if ``False``, it will not search for 90° / 270° rotated barcodes.\n" ":type try_downscale: bool\n" ":param try_downscale: if ``True`` (the default), decoder also scans downscaled versions of the input; \n" " if ``False``, it will only search in the resolution provided.\n" ":type text_mode: zxing.TextMode\n" ":param text_mode: specifies the TextMode that governs how the raw bytes content is transcoded to text.\n" " Defaults to :py:attr:`zxing.TextMode.HRI`." ":type binarizer: zxing.Binarizer\n" ":param binarizer: the binarizer used to convert image before decoding barcodes.\n" " Defaults to :py:attr:`zxing.Binarizer.LocalAverage`." ":type is_pure: bool\n" ":param is_pure: Set to True if the input contains nothing but a perfectly aligned barcode (generated image).\n" " Speeds up detection in that case. Default is False." ":type ean_add_on_symbol: zxing.EanAddOnSymbol\n" ":param ean_add_on_symbol: Specify whether to Ignore, Read or Require EAN-2/5 add-on symbols while scanning \n" " EAN/UPC codes. Default is ``Ignore``.\n" ":type return_errors: bool\n" ":param return_errors: Set to True to return the barcodes with errors as well (e.g. checksum errors); see ``Barcode.error``.\n" " Default is False.\n" ":rtype: list[zxingcpp.Barcode]\n" ":return: a list of Barcodes, the list is empty if none is found" ); py::class_<Image>(m, "Image", py::buffer_protocol()) .def_property_readonly( "__array_interface__", [](const Image& m) { return py::dict("version"_a = 3, "data"_a = m, "shape"_a = py::make_tuple(m.height(), m.width()), "typestr"_a = "|u1"); }) .def_property_readonly("shape", [](const Image& m) { return py::make_tuple(m.height(), m.width()); }) .def_buffer([](const Image& m) -> py::buffer_info { return { const_cast<uint8_t*>(m.data()), // Pointer to buffer sizeof(uint8_t), // Size of one scalar py::format_descriptor<uint8_t>::format(), // Python struct-style format descriptor 2, // Number of dimensions {m.height(), m.width()}, // Buffer dimensions {m.rowStride(), m.pixStride()}, // Strides (in bytes) for each index true // read-only }; }); #ifdef ZXING_EXPERIMENTAL_API m.def("create_barcode", &create_barcode, py::arg("content"), py::arg("format"), py::arg("ec_level") = "" ); m.def("write_barcode_to_image", &write_barcode_to_image, py::arg("barcode"), py::arg("size_hint") = 0, py::arg("with_hrt") = false, py::arg("with_quiet_zones") = true ); m.def("write_barcode_to_svg", &write_barcode_to_svg, py::arg("barcode"), py::arg("size_hint") = 0, py::arg("with_hrt") = false, py::arg("with_quiet_zones") = true ); #endif m.attr("Bitmap") = m.attr("Image"); // alias to deprecated name for the Image class m.def("write_barcode", &write_barcode, py::arg("format"), py::arg("text"), py::arg("width") = 0, py::arg("height") = 0, py::arg("quiet_zone") = -1, py::arg("ec_level") = -1, "Write (encode) a text into a barcode and return 8-bit grayscale bitmap buffer\n\n" ":type format: zxing.BarcodeFormat\n" ":param format: format of the barcode to create\n" ":type text: str|bytes\n" ":param text: the text/content of the barcode. A str is encoded as utf8 text and bytes as binary data\n" ":type width: int\n" ":param width: width (in pixels) of the barcode to create. If undefined (or set to 0), barcode will be\n" " created with the minimum possible width\n" ":type height: int\n" ":param height: height (in pixels) of the barcode to create. If undefined (or set to 0), barcode will be\n" " created with the minimum possible height\n" ":type quiet_zone: int\n" ":param quiet_zone: minimum size (in pixels) of the quiet zone around barcode. If undefined (or set to -1), \n" " the minimum quiet zone of respective barcode is used." ":type ec_level: int\n" ":param ec_level: error correction level of the barcode (Used for Aztec, PDF417, and QRCode only).\n" ":rtype: zxingcpp.Bitmap\n" ); }
