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librsvg source for verification 2026-05-22

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admin
2026-05-22 16:45:08 +08:00
commit 75af7ac721
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193
librsvg-c/tests/legacy_sizing.rs Normal file
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use librsvg_c::sizing::LegacySize;
use rsvg::{CairoRenderer, Loader, LoadingError, SvgHandle};
fn load_svg(input: &'static [u8]) -> Result<SvgHandle, LoadingError> {
let bytes = glib::Bytes::from_static(input);
let stream = gio::MemoryInputStream::from_bytes(&bytes);
Loader::new().read_stream(&stream, None::<&gio::File>, None::<&gio::Cancellable>)
}
#[test]
fn just_viewbox_uses_viewbox_size() {
let svg = load_svg(
br#"<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 200"/>
"#,
)
.unwrap();
assert_eq!(
CairoRenderer::new(&svg)
.legacy_layer_geometry(None)
.unwrap(),
(
cairo::Rectangle::new(0.0, 0.0, 100.0, 200.0),
cairo::Rectangle::new(0.0, 0.0, 100.0, 200.0),
)
);
}
#[test]
fn no_intrinsic_size_uses_element_geometries() {
let svg = load_svg(
br#"<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg">
<rect x="10" y="20" width="30" height="40" fill="black"/>
</svg>
"#,
)
.unwrap();
assert_eq!(
CairoRenderer::new(&svg)
.legacy_layer_geometry(None)
.unwrap(),
(
cairo::Rectangle::new(10.0, 20.0, 30.0, 40.0),
cairo::Rectangle::new(10.0, 20.0, 30.0, 40.0),
)
);
}
#[test]
fn hundred_percent_width_height_uses_viewbox() {
let svg = load_svg(
br#"<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 100 200"/>
"#,
)
.unwrap();
assert_eq!(
CairoRenderer::new(&svg)
.legacy_layer_geometry(None)
.unwrap(),
(
cairo::Rectangle::new(0.0, 0.0, 100.0, 200.0),
cairo::Rectangle::new(0.0, 0.0, 100.0, 200.0),
)
);
}
#[test]
fn hundred_percent_width_height_no_viewbox_uses_element_geometries() {
let svg = load_svg(
br#"<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%">
<rect x="10" y="20" width="30" height="40" fill="black"/>
</svg>
"#,
)
.unwrap();
assert_eq!(
CairoRenderer::new(&svg)
.legacy_layer_geometry(None)
.unwrap(),
(
cairo::Rectangle::new(10.0, 20.0, 30.0, 40.0),
cairo::Rectangle::new(10.0, 20.0, 30.0, 40.0),
)
);
}
#[test]
fn width_and_viewbox_preserves_aspect_ratio() {
let svg = load_svg(
br#"<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" width="60" viewBox="0 0 30 40">
<rect x="10" y="20" width="30" height="40" fill="black"/>
</svg>
"#,
)
.unwrap();
// Per the spec, the height property should default to 100%, so the above would end up
// like <svg width="60" height="100%" viewBox="0 0 30 40">
//
// If that were being *rendered* to a viewport, no problem, just use units horizontally
// and 100% of the viewport vertically.
//
// But we are being asked to compute the SVG's natural geometry, so the best we can do
// is to take the aspect ratio defined by the viewBox and apply it to the width.
assert_eq!(
CairoRenderer::new(&svg)
.legacy_layer_geometry(None)
.unwrap(),
(
cairo::Rectangle::new(0.0, 0.0, 60.0, 80.0),
cairo::Rectangle::new(0.0, 0.0, 60.0, 80.0),
)
);
}
#[test]
fn height_and_viewbox_preserves_aspect_ratio() {
let svg = load_svg(
br#"<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" height="80" viewBox="0 0 30 40">
<rect x="10" y="20" width="30" height="40" fill="black"/>
</svg>
"#,
)
.unwrap();
// See the comment above in width_and_viewbox_preserves_aspect_ratio(); this
// is equivalent but for the height.
assert_eq!(
CairoRenderer::new(&svg)
.legacy_layer_geometry(None)
.unwrap(),
(
cairo::Rectangle::new(0.0, 0.0, 60.0, 80.0),
cairo::Rectangle::new(0.0, 0.0, 60.0, 80.0),
)
);
}
#[test]
fn zero_width_vbox() {
let svg = load_svg(
br#"<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" width="80" viewBox="0 0 0 40">
<rect x="10" y="20" width="30" height="40" fill="black"/>
</svg>
"#,
)
.unwrap();
assert_eq!(
CairoRenderer::new(&svg)
.legacy_layer_geometry(None)
.unwrap(),
(
cairo::Rectangle::new(0.0, 0.0, 0.0, 0.0),
cairo::Rectangle::new(0.0, 0.0, 0.0, 0.0)
)
);
}
#[test]
fn zero_height_vbox() {
let svg = load_svg(
br#"<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" width="80" viewBox="0 0 30 0">
<rect x="10" y="20" width="30" height="40" fill="black"/>
</svg>
"#,
)
.unwrap();
assert_eq!(
CairoRenderer::new(&svg)
.legacy_layer_geometry(None)
.unwrap(),
(
cairo::Rectangle::new(0.0, 0.0, 0.0, 0.0),
cairo::Rectangle::new(0.0, 0.0, 0.0, 0.0)
)
);
}