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Add a test scene for Clip::Mix #1199

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Add a test scene for Clip::Mix #1199

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4027289
Add a test scene for `Clip::Mix`
DJMcNab Sep 8, 2025
cb0a21f
Add a snapshot_test
DJMcNab Sep 8, 2025
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105 changes: 104 additions & 1 deletion examples/scenes/src/test_scenes.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,7 @@ export_scenes!(
brush_transform(brush_transform: animated),
blend_grid(blend_grid),
deep_blend(deep_blend),
clipped_blend(clipped_blend),
many_clips(many_clips),
conflation_artifacts(conflation_artifacts),
labyrinth(labyrinth),
Expand Down Expand Up @@ -100,7 +101,8 @@ mod impls {
use rand::Rng;
use rand::{SeedableRng, rngs::StdRng};
use vello::kurbo::{
Affine, BezPath, Cap, Circle, Ellipse, Join, PathEl, Point, Rect, Shape, Stroke, Vec2,
Affine, BezPath, Cap, Circle, Ellipse, Join, PathEl, Point, Rect, Shape, Stroke, Triangle,
Vec2,
};
use vello::peniko::color::{AlphaColor, Lch, palette};
use vello::peniko::*;
Expand Down Expand Up @@ -1111,6 +1113,107 @@ mod impls {
}
}

pub(super) fn clipped_blend(scene: &mut Scene, params: &mut SceneParams<'_>) {
params.resolution = Some(Vec2::new(1000., 1200.));
let transform = Affine::translate((10., 100.));
params.text.add_run(
&mut *scene,
None,
32.,
Color::WHITE,
transform.then_translate((10., -30.).into()),
None,
&Style::Fill(Fill::EvenOdd),
"No Clip",
);

scene.fill(
Fill::EvenOdd,
transform,
palette::css::BLUE,
None,
&Rect::from_origin_size((0., 0.), (400., 400.)),
);
scene.push_layer(
Mix::Multiply,
1.0,
transform,
&Triangle::from_coords((200., 0.), (0., 400.), (400., 400.)),
);
scene.fill(
Fill::EvenOdd,
transform,
palette::css::AQUAMARINE,
None,
&Rect::from_origin_size((0., 0.), (400., 400.)),
);
scene.pop_layer();

let transform = Affine::translate((0., 600.));
params.text.add_run(
&mut *scene,
None,
32.,
Color::WHITE,
transform.then_translate((10., -30.).into()),
None,
&Style::Fill(Fill::EvenOdd),
"Mix::Normal",
);

scene.fill(
Fill::EvenOdd,
transform,
palette::css::BLUE,
None,
&Rect::from_origin_size((0., 0.), (400., 400.)),
);
let layer_shape = Triangle::from_coords((200., 0.), (0., 400.), (400., 400.));
scene.push_layer(Mix::Normal, 1.0, transform, &layer_shape);
scene.push_layer(Mix::Multiply, 1.0, transform, &layer_shape);
scene.fill(
Fill::EvenOdd,
transform,
palette::css::AQUAMARINE,
None,
&Rect::from_origin_size((0., 0.), (400., 400.)),
);
scene.pop_layer();
scene.pop_layer();

let transform = Affine::translate((500., 600.));
params.text.add_run(
&mut *scene,
None,
32.,
Color::WHITE,
transform.then_translate((10., -30.).into()),
None,
&Style::Fill(Fill::EvenOdd),
"Mix::Clip",
);

scene.fill(
Fill::EvenOdd,
transform,
palette::css::BLUE,
None,
&Rect::from_origin_size((0., 0.), (400., 400.)),
);
let layer_shape = Triangle::from_coords((200., 0.), (0., 400.), (400., 400.));
scene.push_layer(Mix::Clip, 1.0, transform, &layer_shape);
scene.push_layer(Mix::Multiply, 1.0, transform, &layer_shape);
scene.fill(
Fill::EvenOdd,
transform,
palette::css::AQUAMARINE,
None,
&Rect::from_origin_size((0., 0.), (400., 400.)),
);
scene.pop_layer();
scene.pop_layer();
}

pub(super) fn many_clips(scene: &mut Scene, params: &mut SceneParams<'_>) {
params.resolution = Some(Vec2::new(1000., 1000.));
let mut rng = StdRng::seed_from_u64(42);
Expand Down
3 changes: 3 additions & 0 deletions vello_tests/snapshots/clipped_blend.png
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8 changes: 8 additions & 0 deletions vello_tests/tests/snapshot_test_scenes.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -82,6 +82,14 @@ fn snapshot_deep_blend() {
snapshot_test_scene(test_scene, params);
}

#[test]
#[cfg_attr(skip_gpu_tests, ignore)]
fn snapshot_clipped_blend() {
let test_scene = test_scenes::clipped_blend();
let params = TestParams::new("clipped_blend", 400, 400);
snapshot_test_scene(test_scene, params);
}

#[test]
#[cfg_attr(skip_gpu_tests, ignore)]
fn snapshot_gradient_extend() {
Expand Down
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