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fix(canvas): feather the cursor halo

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A single wide 28% band read as a dirty grey ring - the glow is now three
concentric strokes with falling alpha, approximating a soft blur with
the primitives available.
This commit is contained in:
Fini 2026-07-13 21:41:24 +08:00
parent 20bf8f123b
commit be8fb65c0e
1 changed files with 12 additions and 7 deletions
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19
crates/op-editor-ui/src/widgets/canvas_agent_cursor.rs
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@ -642,8 +642,10 @@ pub(crate) fn paint_cursor_swatch(
.map(|(dx, dy)| Point2D::new(origin.x + dx, origin.y + dy))
.collect()
};
cx.backend
.stroke_polygon(&at(silhouette.body), PENCIL_HALO.with_alpha(0.28), 4.5);
for (width, alpha) in [(5.4, 0.05), (3.8, 0.08), (2.5, 0.12)] {
cx.backend
.stroke_polygon(&at(silhouette.body), PENCIL_HALO.with_alpha(alpha), width);
}
cx.backend.fill_polygon(&at(silhouette.body), color);
cx.backend
.stroke_polygon(&at(silhouette.body), Color::WHITE.with_alpha(0.9), 1.2);
@ -696,11 +698,14 @@ fn paint_sprite(cx: &mut PaintCx<'_>, sprite: &CursorSprite, now_ms: u64, silhou
cx.backend
.fill_polygon(&shadow, Color::BLACK.with_alpha(0.14 * sprite.alpha));
// Dark halo OUTSIDE the white outline (user-picked "O4", the macOS
// pointer treatment): a pure-white outline vanished on light designs;
// the wide low-alpha dark ring keeps the silhouette readable on any
// ground while the white rim keeps it crisp on dark ones.
cx.backend
.stroke_polygon(&body, PENCIL_HALO.with_alpha(0.28 * sprite.alpha), 5.4);
// pointer treatment): a pure-white outline vanished on light designs.
// No blur primitive exists, so the glow is FEATHERED as three
// concentric strokes with falling alpha - a single wide 28% band read
// as a dirty grey ring (user feedback 2026-07-12).
for (width, alpha) in [(6.6, 0.05), (4.6, 0.08), (2.9, 0.12)] {
cx.backend
.stroke_polygon(&body, PENCIL_HALO.with_alpha(alpha * sprite.alpha), width);
}
cx.backend
.fill_polygon(&body, sprite.color.with_alpha(sprite.alpha));
cx.backend