50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
use super::*;
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/// A rectangular shadow with a soft penumbra.
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#[derive(Clone, Copy, Debug, Default, PartialEq)]
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#[cfg_attr(feature = "persistence", derive(serde::Deserialize, serde::Serialize))]
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pub struct Shadow {
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// The shadow extends this much outside the rect.
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pub extrusion: f32,
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pub color: Color32,
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}
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impl Shadow {
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/// Tooltips, menus, ...
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pub fn small() -> Self {
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Self {
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extrusion: 8.0,
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color: Color32::from_black_alpha(64),
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}
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}
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/// Windows
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pub fn big() -> Self {
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Self {
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extrusion: 32.0,
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color: Color32::from_black_alpha(96),
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}
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}
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pub fn tessellate(&self, rect: emath::Rect, corner_radius: f32) -> Triangles {
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// tessellator.clip_rect = clip_rect; // TODO: culling
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let Self { extrusion, color } = *self;
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use crate::tessellator::*;
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let rect = PaintRect {
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rect: rect.expand(0.5 * extrusion),
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corner_radius: corner_radius + 0.5 * extrusion,
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fill: color,
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stroke: Default::default(),
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};
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let mut tessellator = Tessellator::from_options(TessellationOptions {
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aa_size: extrusion,
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anti_alias: true,
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..Default::default()
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});
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let mut triangles = Triangles::default();
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tessellator.tessellate_rect(&rect, &mut triangles);
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triangles
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}
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}
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