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Apply opacity and blend modes to individual layers in Vello (#1874)

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Apply blending to individual layers
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Dennis Kobert 2024-07-30 02:56:21 +02:00 • committed by GitHub
parent 5087a2b0f8
commit 22ebe9a2cb
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1 changed files with 17 additions and 0 deletions
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17
node-graph/gcore/src/graphic_element/renderer.rs
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@ -348,6 +348,20 @@ impl GraphicElementRendered for VectorData {
use crate::vector::style::GradientType;
use vello::peniko;
let multiplied_transform = transform * self.transform;
let transformed_bounds = self.bounding_box_with_transform(multiplied_transform).unwrap_or_default();
let mut layer = false;
if self.alpha_blending.opacity < 1. || self.alpha_blending.blend_mode != BlendMode::default() {
layer = true;
scene.push_layer(
peniko::BlendMode::new(self.alpha_blending.blend_mode.into(), peniko::Compose::SrcOver),
self.alpha_blending.opacity,
kurbo::Affine::IDENTITY,
&kurbo::Rect::new(transformed_bounds[0].x, transformed_bounds[0].y, transformed_bounds[1].x, transformed_bounds[1].y),
);
}
let kurbo_transform = kurbo::Affine::new(transform.to_cols_array());
let to_point = |p: DVec2| kurbo::Point::new(p.x, p.y);
let mut path = kurbo::BezPath::new();
@ -418,6 +432,9 @@ impl GraphicElementRendered for VectorData {
scene.stroke(&stroke, kurbo_transform, color, None, &path);
}
}
if layer {
scene.pop_layer();
}
}
}