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 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530
|
/*
* 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"
);
}
|