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Rework Gradient into a newtype of List<Color> with optional position and midpoint attributes (#4397)

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* Rework Gradient into a newtype of List<Color> with optional position and midpoint attributes

* Fix Vello stopless-gradient fallback coverage, empty legacy gradient tables, the node docs gradient swatch, NaN position elision, and wired setter input overwrites
This commit is contained in:
Keavon Chambers
2026-09-10 20:23:55 +00:00
committed by Dennis Kobert
parent 4c8bddea9f
commit f688e4d478
35 changed files with 1105 additions and 446 deletions
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node-graph/nodes/graphic/src/graphic.rs
+2 -11
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@@ -15,7 +15,7 @@ use raster_types::{CPU, GPU, Raster};
use std::cmp::Ordering;
use vector_types::gradient::{GradientSpreadMethod, GradientType as GradientTypeValue};
use vector_types::{Gradient, GradientStop, ReferencePoint};
use vector_types::{Gradient, ReferencePoint};
/// Resolves a signed index over `total` lanes: negatives count from the end,
/// out of range resolves to nothing.
@@ -999,16 +999,7 @@ pub fn flatten_gradient<T: IntoGraphicList>(_: impl Ctx, #[implementations(List<
/// Constructs a gradient from a `Color[]`, where the colors are evenly distributed as gradient stops across the range from 0 to 1.
#[node_macro::node(category("Color"), name("Colors to Gradient"))]
fn colors_to_gradient<T: IntoGraphicList>(_: impl Ctx, #[implementations(List<Graphic>, List<Color>)] colors: T) -> Gradient {
let colors = colors.into_flattened_list::<Color>();
let stop = |position: f64, color: Color| GradientStop { position, midpoint: 0.5, color };
match colors.len() {
0 => Gradient::new(vec![stop(0., Color::BLACK), stop(1., Color::BLACK)]),
1 => Gradient::new(vec![
stop(0., colors.element(0).copied().unwrap_or(Color::BLACK)),
stop(1., colors.element(0).copied().unwrap_or(Color::BLACK)),
]),
total => Gradient::new(colors.into_iter().enumerate().map(|(index, row)| stop(index as f64 / (total - 1) as f64, row.into_element()))),
}
Gradient::from(colors.into_flattened_list::<Color>())
}
#[cfg(test)]