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[test_scenes] Add test scenes that demonstrate incorrect clipping

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Added a test scene that demonstrates the clipping bugs reported in
vello#286 and vello#333.
This commit is contained in:
Arman Uguray 2023-06-28 18:23:46 -07:00
parent 12e764d58d
commit cf25068795
1 changed files with 91 additions and 0 deletions
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91
examples/scenes/src/test_scenes.rs
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@ -51,6 +51,7 @@ pub fn test_scenes() -> SceneSet {
scene!(conflation_artifacts),
scene!(labyrinth),
scene!(base_color_test: animated),
scene!(clip_test: animated),
];
SceneSet { scenes }
@ -824,6 +825,96 @@ fn base_color_test(sb: &mut SceneBuilder, params: &mut SceneParams) {
);
}
fn clip_test(sb: &mut SceneBuilder, params: &mut SceneParams) {
let clip = {
const X0: f64 = 50.0;
const Y0: f64 = 0.0;
const X1: f64 = 200.0;
const Y1: f64 = 500.0;
[
PathEl::MoveTo((X0, Y0).into()),
PathEl::LineTo((X1, Y0).into()),
PathEl::LineTo((X1, Y0 + (Y1 - Y0)).into()),
PathEl::LineTo((X1 + (X0 - X1), Y1).into()),
PathEl::LineTo((X0, Y1).into()),
PathEl::ClosePath,
]
};
sb.push_layer(Mix::Clip, 1.0, Affine::IDENTITY, &clip);
{
let text_size = 60.0 + 40.0 * (params.time as f32).sin();
let s = "Some clipped text!";
params.text.add(
sb,
None,
text_size,
None,
Affine::translate((110.0, 100.0)),
s,
);
}
sb.pop_layer();
let large_background_rect = kurbo::Rect::new(-1000.0, -1000.0, 2000.0, 2000.0);
let inside_clip_rect = kurbo::Rect::new(11.0, 13.399999999999999, 59.0, 56.6);
let outside_clip_rect = kurbo::Rect::new(
12.599999999999998,
12.599999999999998,
57.400000000000006,
57.400000000000006,
);
let clip_rect = kurbo::Rect::new(0.0, 0.0, 74.4, 339.20000000000005);
let scale = 2.0;
sb.push_layer(
BlendMode {
mix: peniko::Mix::Normal,
compose: peniko::Compose::SrcOver,
},
1.0,
Affine::new([scale, 0.0, 0.0, scale, 27.07470703125, 176.40660533027858]),
&clip_rect,
);
sb.fill(
peniko::Fill::NonZero,
kurbo::Affine::new([scale, 0.0, 0.0, scale, 27.07470703125, 176.40660533027858]),
peniko::Color::rgb8(0, 0, 255),
None,
&large_background_rect,
);
sb.fill(
peniko::Fill::NonZero,
kurbo::Affine::new([
scale,
0.0,
0.0,
scale,
29.027636718750003,
182.9755506427786,
]),
peniko::Color::rgb8(0, 255, 0),
None,
&inside_clip_rect,
);
sb.fill(
peniko::Fill::NonZero,
kurbo::Affine::new([
scale,
0.0,
0.0,
scale,
29.027636718750003,
scale * 559.3583631427786,
]),
peniko::Color::rgb8(255, 0, 0),
None,
&outside_clip_rect,
);
sb.pop_layer();
}
fn around_center(xform: Affine, center: Point) -> Affine {
Affine::translate(center.to_vec2()) * xform * Affine::translate(-center.to_vec2())
}