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gfx: Add elliptical border radius support

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This commit is contained in:
Bryan Bell 2015-08-31 19:59:02 -07:00
parent 7474b29510
commit 3e5fb49b6f
9 changed files with 603 additions and 305 deletions
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50
components/gfx/display_list/mod.rs
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@ -961,12 +961,44 @@ pub struct BorderDisplayItem {
/// Information about the border radii.
///
/// TODO(pcwalton): Elliptical radii.
#[derive(Clone, Default, PartialEq, Debug, Copy, HeapSizeOf, Deserialize, Serialize)]
#[derive(Clone, PartialEq, Debug, Copy, HeapSizeOf, Deserialize, Serialize)]
pub struct BorderRadii<T> {
pub top_left: T,
pub top_right: T,
pub bottom_right: T,
pub bottom_left: T,
pub top_left: Size2D<T>,
pub top_right: Size2D<T>,
pub bottom_right: Size2D<T>,
pub bottom_left: Size2D<T>,
}
impl<T> Default for BorderRadii<T> where T: Default, T: Clone {
fn default() -> Self {
let top_left = Size2D::new(Default::default(),
Default::default());
let top_right = Size2D::new(Default::default(),
Default::default());
let bottom_left = Size2D::new(Default::default(),
Default::default());
let bottom_right = Size2D::new(Default::default(),
Default::default());
BorderRadii { top_left: top_left,
top_right: top_right,
bottom_left: bottom_left,
bottom_right: bottom_right }
}
}
impl BorderRadii<Au> {
// Scale the border radii by the specified factor
pub fn scale_by(&self, s: f32) -> BorderRadii<Au> {
BorderRadii { top_left: BorderRadii::scale_corner_by(self.top_left, s),
top_right: BorderRadii::scale_corner_by(self.top_right, s),
bottom_left: BorderRadii::scale_corner_by(self.bottom_left, s),
bottom_right: BorderRadii::scale_corner_by(self.bottom_right, s) }
}
// Scale the border corner radius by the specified factor
pub fn scale_corner_by(corner: Size2D<Au>, s: f32) -> Size2D<Au> {
Size2D { width: corner.width.scale_by(s), height: corner.height.scale_by(s) }
}
}
impl<T> BorderRadii<T> where T: PartialEq + Zero {
@ -982,10 +1014,10 @@ impl<T> BorderRadii<T> where T: PartialEq + Zero + Clone {
/// Returns a set of border radii that all have the given value.
pub fn all_same(value: T) -> BorderRadii<T> {
BorderRadii {
top_left: value.clone(),
top_right: value.clone(),
bottom_right: value.clone(),
bottom_left: value.clone(),
top_left: Size2D { width: value.clone(), height: value.clone() },
top_right: Size2D { width: value.clone(), height: value.clone() },
bottom_right: Size2D { width: value.clone(), height: value.clone() },
bottom_left: Size2D { width: value.clone(), height: value.clone() },
}
}
}