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enhance: Implement CanvasRenderingContext2D.measureText (#32704)

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Signed-off-by: Chocolate Pie <106949016+chocolate-pie@users.noreply.github.com>
Co-authored-by: Martin Robinson <mrobinson@igalia.com>
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Chocolate Pie 2024-07-18 04:20:18 +09:00 • committed by GitHub
parent d82232d549
commit 1223335547
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14 changed files with 325 additions and 51 deletions
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17
components/shared/canvas/canvas.rs
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@ -58,6 +58,7 @@ pub enum Canvas2dMsg {
IsPointInPath(f64, f64, FillRule, IpcSender<bool>),
LineTo(Point2D<f32>),
MoveTo(Point2D<f32>),
MeasureText(String, IpcSender<TextMetrics>),
PutImageData(Rect<u64>, IpcBytesReceiver),
QuadraticCurveTo(Point2D<f32>, Point2D<f32>),
Rect(Rect<f32>),
@ -474,3 +475,19 @@ impl FromStr for Direction {
}
}
}
#[derive(Clone, Debug, Default, Deserialize, MallocSizeOf, Serialize)]
pub struct TextMetrics {
pub width: f32,
pub actual_boundingbox_left: f32,
pub actual_boundingbox_right: f32,
pub actual_boundingbox_ascent: f32,
pub actual_boundingbox_descent: f32,
pub font_boundingbox_ascent: f32,
pub font_boundingbox_descent: f32,
pub em_height_ascent: f32,
pub em_height_descent: f32,
pub hanging_baseline: f32,
pub alphabetic_baseline: f32,
pub ideographic_baseline: f32,
}