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Tweak usvg options (#4163)

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Laurenz 2024-05-17 11:27:05 +02:00 committed by GitHub
parent 2188a4bf48
commit 00f7588755
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1 changed files with 22 additions and 14 deletions
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26
crates/typst/src/visualize/image/svg.rs
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@ -4,8 +4,9 @@ use std::sync::Arc;
use comemo::Tracked; use comemo::Tracked;
use ecow::EcoString; use ecow::EcoString;
use once_cell::sync::Lazy;
use siphasher::sip128::Hasher128; use siphasher::sip128::Hasher128;
use usvg::{Node, PostProcessingSteps, TreeParsing, TreePostProc}; use usvg::{ImageHrefResolver, Node, PostProcessingSteps, TreeParsing, TreePostProc};
use crate::diag::{format_xml_like_error, StrResult}; use crate::diag::{format_xml_like_error, StrResult};
use crate::foundations::Bytes; use crate::foundations::Bytes;
@ -31,7 +32,7 @@ impl SvgImage {
#[comemo::memoize] #[comemo::memoize]
pub fn new(data: Bytes) -> StrResult<SvgImage> { pub fn new(data: Bytes) -> StrResult<SvgImage> {
let mut tree = let mut tree =
usvg::Tree::from_data(&data, &options()).map_err(format_usvg_error)?; usvg::Tree::from_data(&data, &OPTIONS).map_err(format_usvg_error)?;
tree.calculate_bounding_boxes(); tree.calculate_bounding_boxes();
Ok(Self(Arc::new(Repr { Ok(Self(Arc::new(Repr {
data, data,
@ -50,7 +51,7 @@ impl SvgImage {
families: &[String], families: &[String],
) -> StrResult<SvgImage> { ) -> StrResult<SvgImage> {
let mut tree = let mut tree =
usvg::Tree::from_data(&data, &options()).map_err(format_usvg_error)?; usvg::Tree::from_data(&data, &OPTIONS).map_err(format_usvg_error)?;
let mut font_hash = 0; let mut font_hash = 0;
if tree.has_text_nodes() { if tree.has_text_nodes() {
let (fontdb, hash) = load_svg_fonts(world, &mut tree, families); let (fontdb, hash) = load_svg_fonts(world, &mut tree, families);
@ -124,20 +125,27 @@ impl Hash for Repr {
} }
/// The conversion options. /// The conversion options.
fn options() -> usvg::Options { static OPTIONS: Lazy<usvg::Options> = Lazy::new(|| usvg::Options {
// Disable usvg's default to "Times New Roman". Instead, we default to // Disable usvg's default to "Times New Roman". Instead, we default to
// the empty family and later, when we traverse the SVG, we check for // the empty family and later, when we traverse the SVG, we check for
// empty and non-existing family names and replace them with the true // empty and non-existing family names and replace them with the true
// fallback family. This way, we can memoize SVG decoding with and without // fallback family. This way, we can memoize SVG decoding with and
// fonts if the SVG does not contain text. // without fonts if the SVG does not contain text.
usvg::Options {
font_family: String::new(), font_family: String::new(),
// We override the DPI here so that we get the correct the size when // We override the DPI here so that we get the correct the size when
// scaling the image to its natural size. // scaling the image to its natural size.
dpi: Image::DEFAULT_DPI as f32, dpi: Image::DEFAULT_DPI as f32,
// Override usvg's resource loading defaults.
resources_dir: None,
image_href_resolver: ImageHrefResolver {
resolve_data: ImageHrefResolver::default_data_resolver(),
resolve_string: Box::new(|_, _| None),
},
..Default::default() ..Default::default()
} });
}
/// Discover and load the fonts referenced by an SVG. /// Discover and load the fonts referenced by an SVG.
fn load_svg_fonts( fn load_svg_fonts(