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annotate mupdf-source/thirdparty/zxing-cpp/wrappers/rust/README.md @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
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1 # zxing-cpp
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3 zxing-cpp is a Rust wrapper for the C++ library [zxing-cpp](https://github.com/zxing-cpp/zxing-cpp).
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5 It is an open-source, multi-format linear/matrix barcode image processing library implemented in C++.
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6 It was originally ported from the Java ZXing Library but has been developed further and now includes
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7 many improvements in terms of runtime and detection performance.
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9 ## Usage
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11 In your Cargo.toml:
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13 ```toml
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14 [dependencies]
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15 # `bundled` causes cargo to compile and statically link an up to
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16 # date version of the c++ core library. This is the most convenient
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17 # and safe way to build the library.
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18 zxing-cpp = { version = "0.4.1", features = ["bundled", "image"] }
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19 ```
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21 Simple example reading some barcodes from a jpg file:
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23 ```rust
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24 use zxingcpp::BarcodeFormat;
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26 fn main() -> anyhow::Result<()> {
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27 let image = image::open("some-image-file.jpg")?;
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29 let read_barcodes = zxingcpp::read()
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30 .formats(BarcodeFormat::QRCode | BarcodeFormat::LinearCodes)
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31 .try_invert(false);
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33 let barcodes = read_barcodes.from(&image)?;
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35 for barcode in barcodes {
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36 println!("{}: {}", barcode.format(), barcode.text());
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37 }
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39 Ok(())
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40 }
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41 ```
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43 Simple example creating a barcode and writing it to a svg file:
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45 ```rust
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46 fn main() -> anyhow::Result<()> {
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47 let svg = zxingcpp::create(zxingcpp::BarcodeFormat::QRCode)
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48 .from_str("https://github.com/zxing-cpp/zxing-cpp")?
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49 .to_svg_with(&zxingcpp::write().scale(5))?;
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50 std::fs::write("zxingcpp.svg", svg)?;
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51 Ok(())
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52 }
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53 ```
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55 Note: This should currently be considered a pre-release. The API may change slightly to be even more
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56 idiomatic rust depending on community feedback.
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58 ## Optional Features
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60 zxing-cpp provides features that are behind [Cargo features](https://doc.rust-lang.org/cargo/reference/manifest.html#the-features-section).
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61 They are:
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63 * `bundled` uses a bundled version of the [zxing-cpp](https://github.com/zxing-cpp/zxing-cpp) c++ library.
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64 * [`image`](https://crates.io/crates/image) allows convenient/implicit conversion between `ImageView`/`Image` and`GreyImage`/`DynamicImage`.
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66 ## Benchmarking
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68 To compare the performance of this Rust wrapper project with other available barcode scanner Rust libraries,
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69 I started the project [zxing-bench](https://github.com/axxel/zxing-bench). The README contains a few
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70 results to get an idea.