148 lines
4.4 KiB
Markdown
148 lines
4.4 KiB
Markdown
qrcode-rust
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===========
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[](https://travis-ci.org/kennytm/qrcode-rust)
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[](https://coveralls.io/github/kennytm/qrcode-rust?branch=coveralls)
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[](https://crates.io/crates/qrcode)
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[](./LICENSE-APACHE.txt)
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QR code and Micro QR code encoder in Rust. [Documentation](https://docs.rs/qrcode).
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Cargo.toml
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----------
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```toml
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[dependencies]
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qrcode = "0.12"
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```
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The default settings will depend on the `image` crate. If you don't need image generation capability, disable the `default-features`:
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```toml
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[dependencies]
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qrcode = { version = "0.12", default-features = false }
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```
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Example
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-------
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## Image generation
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```rust
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use qrcode::QrCode;
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use image::Luma;
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fn main() {
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// Encode some data into bits.
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let code = QrCode::new(b"01234567").unwrap();
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// Render the bits into an image.
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let image = code.render::<Luma<u8>>().build();
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// Save the image.
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image.save("/tmp/qrcode.png").unwrap();
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}
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```
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Generates this image:
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## String generation
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```rust
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use qrcode::QrCode;
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fn main() {
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let code = QrCode::new(b"Hello").unwrap();
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let string = code.render::<char>()
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.quiet_zone(false)
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.module_dimensions(2, 1)
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.build();
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println!("{}", string);
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}
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```
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Generates this output:
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```none
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############## ######## ##############
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## ## ## ## ##
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## ###### ## ## ## ## ## ###### ##
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## ###### ## ## ## ## ###### ##
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## ###### ## #### ## ## ###### ##
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## ## #### ## ## ##
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############## ## ## ## ##############
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## ##
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## ########## ## ## ##########
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## ## ######## #### ##
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########## #### ## #### ######
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## ## #### ########## ####
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###### ########## ## ## ##
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## ## ## ##
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############## ## ## ## ## ####
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## ## ## ## ##########
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## ###### ## ## ## ## ## ##
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## ###### ## #### ########## ##
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## ###### ## #### ## #### ##
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## ## ## ######## ######
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############## #### ## ## ##
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```
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## SVG generation
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```rust
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use qrcode::{QrCode, Version, EcLevel};
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use qrcode::render::svg;
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fn main() {
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let code = QrCode::with_version(b"01234567", Version::Micro(2), EcLevel::L).unwrap();
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let image = code.render()
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.min_dimensions(200, 200)
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.dark_color(svg::Color("#800000"))
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.light_color(svg::Color("#ffff80"))
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.build();
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println!("{}", image);
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}
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```
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Generates this SVG:
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[](src/test_annex_i_micro_qr_as_svg.svg)
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## Unicode string generation
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```rust
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use qrcode::QrCode;
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use qrcode::render::unicode;
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fn main() {
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let code = QrCode::new("mow mow").unwrap();
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let image = code.render::<unicode::Dense1x2>()
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.dark_color(unicode::Dense1x2::Light)
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.light_color(unicode::Dense1x2::Dark)
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.build();
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println!("{}", image);
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}
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```
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Generates this output:
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```text
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█████████████████████████████
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█████████████████████████████
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████ ▄▄▄▄▄ █ ▀▀▀▄█ ▄▄▄▄▄ ████
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████ █ █ █▀ ▀ ▀█ █ █ ████
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████ █▄▄▄█ ██▄ ▀█ █▄▄▄█ ████
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████▄▄▄▄▄▄▄█ ▀▄▀ █▄▄▄▄▄▄▄████
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████▄▀ ▄▀ ▄ █▄█ ▀ ▀█ █▄ ████
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████▄██▄▄▀▄▄▀█▄ ██▀▀█▀▄▄▄████
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█████▄▄▄█▄▄█ ▀▀▄█▀▀▀▄█▄▄████
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████ ▄▄▄▄▄ █ ▄▄██▄ ▄ ▀▀████
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████ █ █ █▀▄▄▀▄▄ ▄▄▄▄ ▄████
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████ █▄▄▄█ █▄ █▄▀▄▀██▄█▀████
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████▄▄▄▄▄▄▄█▄████▄█▄██▄██████
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█████████████████████████████
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▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
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```
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