Struct QrCode

Source

pub struct QrCode { /* private fields */ }

Expand description

Define QR code

Implementations§

Source §

impl QrCode

Source

pub fn new<T: AsRef<[u8]>>( content: T, ecl: QrCodeEcc, ) -> Result<Self, DataTooLong>

Create a QR code

Examples found in repository ?

examples/qrcode.rs (line 4)

3fn main() {
4    let mut qrcode = QrCode::new(b"Hello Rust !", QrCodeEcc::Medium).unwrap();
5
6    qrcode.zoom(10).margin(10);
7
8    // -------- Bitmap
9    let buf = qrcode.generate(Color::Bitmap(false, true)).unwrap();
10    std::fs::write("./qrcode.bitmap.png", buf).unwrap();
11
12    // -------- Grayscale
13    let buf = qrcode.generate(Color::Grayscale(0, 255)).unwrap();
14    std::fs::write("./qrcode.grayscale.png", buf).unwrap();
15
16    // -------- RGB
17    let buf = qrcode
18        .generate(Color::Rgb([3, 169, 244], [113, 140, 0]))
19        .unwrap();
20    std::fs::write("./qrcode.rgb.png", buf).unwrap();
21
22    // -------- RGBA
23    let buf = qrcode
24        .generate(Color::Rgba([137, 89, 168, 255], [255, 255, 255, 0]))
25        .unwrap();
26    std::fs::write("./qrcode.rgba.png", buf).unwrap();
27}

Source

pub fn zoom(&mut self, zoom: u32) -> &mut Self

Enlarge the QR code according to the original scale, Default value: 1

Examples found in repository ?

examples/qrcode.rs (line 6)

3fn main() {
4    let mut qrcode = QrCode::new(b"Hello Rust !", QrCodeEcc::Medium).unwrap();
5
6    qrcode.zoom(10).margin(10);
7
8    // -------- Bitmap
9    let buf = qrcode.generate(Color::Bitmap(false, true)).unwrap();
10    std::fs::write("./qrcode.bitmap.png", buf).unwrap();
11
12    // -------- Grayscale
13    let buf = qrcode.generate(Color::Grayscale(0, 255)).unwrap();
14    std::fs::write("./qrcode.grayscale.png", buf).unwrap();
15
16    // -------- RGB
17    let buf = qrcode
18        .generate(Color::Rgb([3, 169, 244], [113, 140, 0]))
19        .unwrap();
20    std::fs::write("./qrcode.rgb.png", buf).unwrap();
21
22    // -------- RGBA
23    let buf = qrcode
24        .generate(Color::Rgba([137, 89, 168, 255], [255, 255, 255, 0]))
25        .unwrap();
26    std::fs::write("./qrcode.rgba.png", buf).unwrap();
27}

Source

pub fn margin(&mut self, margin: u32) -> &mut Self

Set the distance between the QR code and the edge of the picture

Examples found in repository ?

examples/qrcode.rs (line 6)

3fn main() {
4    let mut qrcode = QrCode::new(b"Hello Rust !", QrCodeEcc::Medium).unwrap();
5
6    qrcode.zoom(10).margin(10);
7
8    // -------- Bitmap
9    let buf = qrcode.generate(Color::Bitmap(false, true)).unwrap();
10    std::fs::write("./qrcode.bitmap.png", buf).unwrap();
11
12    // -------- Grayscale
13    let buf = qrcode.generate(Color::Grayscale(0, 255)).unwrap();
14    std::fs::write("./qrcode.grayscale.png", buf).unwrap();
15
16    // -------- RGB
17    let buf = qrcode
18        .generate(Color::Rgb([3, 169, 244], [113, 140, 0]))
19        .unwrap();
20    std::fs::write("./qrcode.rgb.png", buf).unwrap();
21
22    // -------- RGBA
23    let buf = qrcode
24        .generate(Color::Rgba([137, 89, 168, 255], [255, 255, 255, 0]))
25        .unwrap();
26    std::fs::write("./qrcode.rgba.png", buf).unwrap();
27}

Source

pub fn generate(&self, color: Color) -> Result<Vec<u8>, EncodingError>

Get png data of QR code

Examples found in repository ?

examples/qrcode.rs (line 9)

3fn main() {
4    let mut qrcode = QrCode::new(b"Hello Rust !", QrCodeEcc::Medium).unwrap();
5
6    qrcode.zoom(10).margin(10);
7
8    // -------- Bitmap
9    let buf = qrcode.generate(Color::Bitmap(false, true)).unwrap();
10    std::fs::write("./qrcode.bitmap.png", buf).unwrap();
11
12    // -------- Grayscale
13    let buf = qrcode.generate(Color::Grayscale(0, 255)).unwrap();
14    std::fs::write("./qrcode.grayscale.png", buf).unwrap();
15
16    // -------- RGB
17    let buf = qrcode
18        .generate(Color::Rgb([3, 169, 244], [113, 140, 0]))
19        .unwrap();
20    std::fs::write("./qrcode.rgb.png", buf).unwrap();
21
22    // -------- RGBA
23    let buf = qrcode
24        .generate(Color::Rgba([137, 89, 168, 255], [255, 255, 255, 0]))
25        .unwrap();
26    std::fs::write("./qrcode.rgba.png", buf).unwrap();
27}