77 lines
2.0 KiB
Rust
77 lines
2.0 KiB
Rust
//! SVG rendering support.
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//!
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//! # Example
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//!
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//! ```
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//! use qrcode::QrCode;
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//! use qrcode::render::svg;
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//!
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//! let code = QrCode::new(b"Hello").unwrap();
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//! let svg_xml = code.render::<svg::Color>().build();
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//! println!("{}", svg_xml);
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#![cfg(feature = "svg")]
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use std::fmt::Write;
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use std::marker::PhantomData;
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use crate::render::{Canvas as RenderCanvas, Pixel};
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use crate::types::Color as ModuleColor;
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/// An SVG color.
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#[derive(Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
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pub struct Color<'a>(pub &'a str);
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impl<'a> Pixel for Color<'a> {
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type Canvas = Canvas<'a>;
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type Image = String;
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fn default_color(color: ModuleColor) -> Self {
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Color(color.select("#000", "#fff"))
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}
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}
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#[doc(hidden)]
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pub struct Canvas<'a> {
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svg: String,
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marker: PhantomData<Color<'a>>,
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}
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impl<'a> RenderCanvas for Canvas<'a> {
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type Pixel = Color<'a>;
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type Image = String;
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fn new(width: u32, height: u32, dark_pixel: Color<'a>, light_pixel: Color<'a>) -> Self {
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Canvas {
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svg: format!(
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concat!(
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r#"<?xml version="1.0" standalone="yes"?>"#,
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r#"<svg xmlns="http://www.w3.org/2000/svg""#,
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r#" version="1.1" width="{w}" height="{h}""#,
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r#" viewBox="0 0 {w} {h}" shape-rendering="crispEdges">"#,
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r#"<rect x="0" y="0" width="{w}" height="{h}" fill="{bg}"/>"#,
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r#"<path fill="{fg}" d=""#,
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),
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w = width,
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h = height,
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fg = dark_pixel.0,
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bg = light_pixel.0
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),
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marker: PhantomData,
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}
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}
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fn draw_dark_pixel(&mut self, x: u32, y: u32) {
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self.draw_dark_rect(x, y, 1, 1)
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}
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fn draw_dark_rect(&mut self, left: u32, top: u32, width: u32, height: u32) {
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write!(self.svg, "M{l} {t}h{w}v{h}H{l}V{t}", l = left, t = top, w = width, h = height).unwrap();
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}
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fn into_image(mut self) -> String {
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self.svg.push_str(r#""/></svg>"#);
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self.svg
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}
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}
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