132 lines
4.2 KiB
Rust
132 lines
4.2 KiB
Rust
use float_cmp::approx_eq;
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use rsvg::{CairoRenderer, Loader};
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use rsvg::test_utils::setup_font_map;
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use rsvg::{test_compare_render_output, test_svg_reference};
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// From https://www.w3.org/Style/CSS/Test/Fonts/Ahem/
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//
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// > The Ahem font was developed by Todd Fahrner and Myles C. Maxfield to
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// > help test writers develop predictable tests. The units per em is 1000,
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// > the ascent is 800, and the descent is 200, thereby making the em
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// > square exactly square. The glyphs for most characters is simply a box
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// > which fills this square. The codepoints mapped to this full square
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// > with a full advance are the following ranges:
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//
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// So, ascent is 4/5 of the font-size, descent is 1/5. Mind the positions below.
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test_compare_render_output!(
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ahem_font,
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500,
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500,
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br##"<?xml version="1.0" encoding="UTF-8"?>
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<svg xmlns="http://www.w3.org/2000/svg" width="500" height="500">
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<text style="font: 50px Ahem;" x="50" y="50" fill="black">abcde</text>
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</svg>"##,
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br##"<?xml version="1.0" encoding="UTF-8"?>
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<svg xmlns="http://www.w3.org/2000/svg" width="500" height="500">
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<rect x="50" y="10" width="250" height="50" fill="black"/>
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</svg>"##,
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);
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test_svg_reference!(
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text_anchor_chunk_806,
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"tests/fixtures/text/bug806-text-anchor-chunk.svg",
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"tests/fixtures/text/bug806-text-anchor-chunk-ref.svg"
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);
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test_svg_reference!(
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span_bounds_when_offset_by_dx,
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"tests/fixtures/text/span-bounds-when-offset-by-dx.svg",
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"tests/fixtures/text/span-bounds-when-offset-by-dx-ref.svg"
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);
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// FIXME: Ignored because with the change to render all text as paths, the rendering
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// of these is different.
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//
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// test_svg_reference!(
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// tspan_direction_change_804,
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// "tests/fixtures/text/bug804-tspan-direction-change.svg",
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// "tests/fixtures/text/bug804-tspan-direction-change-ref.svg"
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// );
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test_svg_reference!(
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unicode_bidi_override,
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"tests/fixtures/text/unicode-bidi-override.svg",
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"tests/fixtures/text/unicode-bidi-override-ref.svg"
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);
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test_svg_reference!(
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display_none,
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"tests/fixtures/text/display-none.svg",
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"tests/fixtures/text/display-none-ref.svg"
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);
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test_svg_reference!(
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visibility_hidden,
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"tests/fixtures/text/visibility-hidden.svg",
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"tests/fixtures/text/visibility-hidden-ref.svg"
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);
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test_svg_reference!(
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visibility_hidden_x_attr,
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"tests/fixtures/text/visibility-hidden-x-attr.svg",
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"tests/fixtures/text/visibility-hidden-ref.svg"
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);
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test_svg_reference!(
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bounds,
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"tests/fixtures/text/bounds.svg",
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"tests/fixtures/text/bounds-ref.svg"
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);
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test_svg_reference!(
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bug1109_scaled_text_anchor_middle,
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"tests/fixtures/text/bug1109-scaled-text-anchor-middle.svg",
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"tests/fixtures/text/bug1109-scaled-text-anchor-middle-ref.svg"
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);
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fn rect(x: f64, y: f64, width: f64, height: f64) -> cairo::Rectangle {
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cairo::Rectangle::new(x, y, width, height)
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}
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fn rectangle_approx_eq(a: &cairo::Rectangle, b: &cairo::Rectangle) -> bool {
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// FIXME: this is super fishy; shouldn't we be using 2x the epsilon against the width/height
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// instead of the raw coordinates?
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approx_eq!(f64, a.x(), b.x())
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&& approx_eq!(f64, a.y(), b.y())
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&& approx_eq!(f64, a.width(), b.width())
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&& approx_eq!(f64, a.height(), b.height())
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}
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// Test that the computed geometry of text layers is as expected.
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#[test]
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fn test_text_layer_geometry() {
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setup_font_map();
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let handle = Loader::new()
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.read_path("tests/fixtures/text/bounds.svg")
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.unwrap_or_else(|e| panic!("could not load: {}", e));
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let renderer = CairoRenderer::new(&handle).test_mode(true);
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let viewport = rect(0.0, 0.0, 600.0, 600.0);
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// tuples of (element_id, ink_rect)
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let cases = vec![
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("#a", rect(50.0, 60.0, 100.0, 50.0)),
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("#b", rect(200.0, 60.0, 50.0, 100.0)),
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("#c", rect(300.0, 60.0, 50.0, 100.0)),
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("#d", rect(400.0, 60.0, 100.0, 50.0)),
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];
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for (id, expected_ink_rect) in cases {
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let (ink_rect, _) = renderer.geometry_for_layer(Some(id), &viewport).unwrap();
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assert!(
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rectangle_approx_eq(&ink_rect, &expected_ink_rect),
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"ink_rect: {:?}, expected: {:?}",
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ink_rect,
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expected_ink_rect
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);
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}
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}
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