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87dc98b5d9
It works with the Qt backend, and it should work with the GL backend as well. usvg supports it, uses the same underlying shaper and the API even allows sharing the font database.
54 lines
2.1 KiB
Rust
54 lines
2.1 KiB
Rust
/* LICENSE BEGIN
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This file is part of the SixtyFPS Project -- https://sixtyfps.io
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Copyright (c) 2021 Olivier Goffart <olivier.goffart@sixtyfps.io>
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Copyright (c) 2021 Simon Hausmann <simon.hausmann@sixtyfps.io>
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SPDX-License-Identifier: GPL-3.0-only
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This file is also available under commercial licensing terms.
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Please contact info@sixtyfps.io for more information.
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LICENSE END */
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#![cfg(feature = "svg")]
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fn with_svg_options<T>(callback: impl FnOnce(usvg::OptionsRef<'_>) -> T) -> T {
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crate::fonts::FONT_CACHE.with(|cache| {
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let options = usvg::Options::default();
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let mut options_ref = options.to_ref();
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let cache = cache.borrow();
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options_ref.fontdb = &cache.available_fonts;
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callback(options_ref)
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})
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}
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#[cfg(not(target_arch = "wasm32"))]
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pub fn load_from_path(path: &std::path::Path) -> Result<usvg::Tree, std::io::Error> {
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let svg_data = std::fs::read(path)?;
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with_svg_options(|options| {
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usvg::Tree::from_data(&svg_data, &options)
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.map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e))
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})
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}
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pub fn load_from_data(slice: &[u8]) -> Result<usvg::Tree, usvg::Error> {
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with_svg_options(|options| usvg::Tree::from_data(slice, &options))
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}
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pub fn render(
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tree: &usvg::Tree,
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size: euclid::default::Size2D<u32>,
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) -> Result<image::DynamicImage, usvg::Error> {
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// resvg doesn't support scaling to width/height, just fit to width.
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// FIXME: the fit should actually depends on the image-fit property
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let fit = usvg::FitTo::Width(size.width);
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let size = fit.fit_to(tree.svg_node().size.to_screen_size()).ok_or(usvg::Error::InvalidSize)?;
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let mut buffer =
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vec![0u8; size.width() as usize * size.height() as usize * tiny_skia::BYTES_PER_PIXEL];
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let skia_buffer =
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tiny_skia::PixmapMut::from_bytes(buffer.as_mut_slice(), size.width(), size.height())
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.ok_or(usvg::Error::InvalidSize)?;
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resvg::render(tree, fit, skia_buffer).ok_or(usvg::Error::InvalidSize)?;
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Ok(image::DynamicImage::ImageRgba8(
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image::RgbaImage::from_raw(size.width(), size.height(), buffer)
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.ok_or(usvg::Error::InvalidSize)?,
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))
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}
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