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Make text background rects pixel-sharp (#5864)

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Small visual teak: make sure the background text color is pixel-aligned.
This commit is contained in:
Emil Ernerfeldt
2025-03-30 16:21:00 +02:00
committed by GitHub
parent 995058bbd1
commit e3acd71090
3 changed files with 5 additions and 3 deletions
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5
crates/epaint/src/text/text_layout.rs
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@@ -715,7 +715,7 @@ fn tessellate_row(
mesh.reserve_vertices(row.glyphs.len() * 4);
if format_summary.any_background {
add_row_backgrounds(job, row, &mut mesh);
add_row_backgrounds(point_scale, job, row, &mut mesh);
}
let glyph_index_start = mesh.indices.len();
@@ -753,7 +753,7 @@ fn tessellate_row(
/// Create background for glyphs that have them.
/// Creates as few rectangular regions as possible.
fn add_row_backgrounds(job: &LayoutJob, row: &Row, mesh: &mut Mesh) {
fn add_row_backgrounds(point_scale: PointScale, job: &LayoutJob, row: &Row, mesh: &mut Mesh) {
if row.glyphs.is_empty() {
return;
}
@@ -762,6 +762,7 @@ fn add_row_backgrounds(job: &LayoutJob, row: &Row, mesh: &mut Mesh) {
if let Some((color, start_rect, expand)) = start {
let rect = Rect::from_min_max(start_rect.left_top(), pos2(stop_x, start_rect.bottom()));
let rect = rect.expand(expand);
let rect = rect.round_to_pixels(point_scale.pixels_per_point());
mesh.add_colored_rect(rect, color);
}
};