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#![doc(html_root_url = "https://docs.rs/resvg/0.12.0")]
#![warn(missing_docs)]
pub use rgb::RGBA8;
pub use usvg::ScreenSize;
use usvg::NodeExt;
use log::warn;
#[macro_use] mod macros;
mod clip;
mod filter;
mod image;
mod layers;
mod mask;
mod paint_server;
mod path;
mod render;
#[derive(Clone)]
pub struct Image {
data: Vec<u8>,
width: u32,
height: u32,
}
impl Image {
fn from_canvas(canvas: tiny_skia::Canvas) -> Self {
use rgb::FromSlice;
let width = canvas.pixmap.width();
let height = canvas.pixmap.height();
let mut data = canvas.pixmap.take();
svgfilters::demultiply_alpha(data.as_rgba_mut());
Image {
data,
width,
height,
}
}
pub fn width(&self) -> u32 {
self.width
}
pub fn height(&self) -> u32 {
self.height
}
pub fn size(&self) -> ScreenSize {
ScreenSize::new(self.width(), self.height()).unwrap()
}
pub fn data(&self) -> &[u8] {
&self.data
}
pub fn take(self) -> Vec<u8> {
self.data
}
pub fn save_png<P: AsRef<std::path::Path>>(&self, path: P) -> Result<(), png::EncodingError> {
let file = std::fs::File::create(path)?;
let ref mut w = std::io::BufWriter::new(file);
let mut encoder = png::Encoder::new(w, self.width(), self.height());
encoder.set_color(png::ColorType::RGBA);
encoder.set_depth(png::BitDepth::Eight);
let mut writer = encoder.write_header()?;
writer.write_image_data(&self.data())
}
}
pub fn render(
tree: &usvg::Tree,
fit_to: usvg::FitTo,
background: Option<usvg::Color>,
) -> Option<Image> {
let (mut canvas, size)
= render::create_root_image(tree.svg_node().size.to_screen_size(), fit_to, background)?;
render::render_to_canvas(tree, size, &mut canvas);
Some(Image::from_canvas(canvas))
}
pub fn render_node(
node: &usvg::Node,
fit_to: usvg::FitTo,
background: Option<usvg::Color>,
) -> Option<Image> {
let node_bbox = if let Some(bbox) = node.calculate_bbox() {
bbox
} else {
warn!("Node '{}' has zero size.", node.id());
return None;
};
let vbox = usvg::ViewBox {
rect: node_bbox,
aspect: usvg::AspectRatio::default(),
};
let (mut img, img_size)
= render::create_root_image(node_bbox.size().to_screen_size(), fit_to, background)?;
render::render_node_to_canvas(node, vbox, img_size, &mut render::RenderState::Ok, &mut img);
Some(Image::from_canvas(img))
}