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Add a gradient interpolation attribute with Stepped, Linear (existing), and Smooth modes (#4418)

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* Delete dead code function

* Add a Gradient Interpolation axis with Stepped, Linear, and Smooth paths through the stops

* Keep the gradient interpolation attached when dragging stops in the picker

* Give the gradient popover's dropdowns the same tooltips as their row labels

* Order the gradient popover with Intrp. above Space

* Hold gradient stops in place when the cyclic flag is toggled

* Fix wrong Smooth gradient colors around stops sitting on the ramp boundaries

* Consolidate gradient settings plumbing and fix bugs

* Bundle whole-ramp gradient settings into GradientSettings across the editor plumbing

* Name the Smooth gradient interpolation's spline type in its tooltip

* Linearize the gamma hex stop colors recovered from imported Graphite SVGs

* Code review

* Aim the Smooth bake's seam subdivision at the copied boundary color

* Add GradientEvaluator to build gradient sampling state once per loop instead of per sample

* Correct the gradient evaluator's documented setup cost to O(n log n)
This commit is contained in:
Keavon Chambers
2026-08-07 16:43:36 -07:00
committed by GitHub
parent 4b01abe36d
commit 681b4033f5
27 changed files with 1560 additions and 734 deletions
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editor/src/messages/layout/layout_message_handler.rs
+11 -5
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@@ -531,13 +531,19 @@ fn populate_computed_display_fields(layout: &mut Layout) {
color_input.chosen_gradient = color_input.value.to_css_background_image();
}
Widget::SpectrumInput(spectrum_input) => {
spectrum_input.track_css = spectrum_input
.track
.to_css_linear_gradient(spectrum_input.track_cyclic, spectrum_input.track_space, spectrum_input.track_hue_direction);
// The track strip spans exactly 0 to 1, which no spread affects, so the widget carries no spread of its own
let settings = graphene_std::vector::style::GradientSettings {
spread: Default::default(),
cyclic: spectrum_input.track_cyclic,
space: spectrum_input.track_space,
hue_direction: spectrum_input.track_hue_direction,
interpolation: spectrum_input.track_interpolation,
};
spectrum_input.track_css = spectrum_input.track.to_css_linear_gradient(settings);
// The end caps sample the track's boundary colors, which a cyclic wrap makes the wrapped interval's boundary-crossing color rather than the outermost stops'
let track_gradient = graphene_std::vector::style::Gradient::from(&spectrum_input.track);
let track_evaluator = graphene_std::vector::style::Gradient::from(&spectrum_input.track).evaluator(settings);
let cap = |t: f64| {
let color = track_gradient.evaluate(t, Default::default(), spectrum_input.track_cyclic, spectrum_input.track_space, spectrum_input.track_hue_direction);
let color = track_evaluator.evaluate(t);
SRGBA8::from(color).to_css_hex()
};
spectrum_input.track_start_css = cap(0.);