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Make gradient evaluation follow the ramp's interpolation space attribute (#4414)

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This commit is contained in:
Keavon Chambers
2026-08-05 19:32:51 -07:00
committed by GitHub
parent faed7f81bf
commit 3f082c881f
7 changed files with 49 additions and 31 deletions
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node-graph/nodes/raster/src/blending_nodes.rs
+5 -2
View File
@@ -41,13 +41,16 @@ mod blend_std {
}
}
impl Blend<Color> for Gradient {
// TODO: This joining is unfaithful in several ways: it samples only at stop positions so midpoint curves flatten away;
// it evaluates both sources with the default spread and interpolation rather than their own attributes (which this
// element-level impl cannot read); and the output keeps over's attributes despite being sampled in the default space
fn blend(&self, under: &Self, blend_fn: impl Fn(Color, Color) -> Color) -> Self {
let mut combined_stops = self.positions().into_iter().chain(under.positions()).collect::<Vec<_>>();
combined_stops.sort_by(|a, b| a.partial_cmp(b).unwrap_or(Ordering::Equal));
combined_stops.dedup_by(|a, b| (*a - *b).abs() < 1e-6);
let stops = combined_stops.into_iter().map(|position| {
let over_color = self.evaluate(position, Default::default());
let under_color = under.evaluate(position, Default::default());
let over_color = self.evaluate(position, Default::default(), Default::default());
let under_color = under.evaluate(position, Default::default(), Default::default());
let color = blend_fn(over_color, under_color);
GradientStop { position, midpoint: 0.5, color }
});
node-graph/nodes/raster/src/gradient_map.rs
+2 -1
View File
@@ -23,13 +23,14 @@ async fn gradient_map<T: Adjust<Color> + Send>(
) -> Item<T> {
let mut image = image;
let gradient_spread = gradient.attribute_cloned_or_default::<vector_types::GradientSpread>(core_types::ATTR_GRADIENT_SPREAD);
let gradient_interpolation = gradient.attribute_cloned_or_default::<vector_types::GradientInterpolation>(core_types::ATTR_GRADIENT_INTERPOLATION);
let gradient = gradient.into_element();
let reverse = reverse.into_element();
image.element_mut().adjust(|color| {
let intensity = color.luminance_rec_709();
let intensity = if reverse { 1. - intensity } else { intensity };
gradient.evaluate(intensity as f64, gradient_spread)
gradient.evaluate(intensity as f64, gradient_spread, gradient_interpolation)
});
image