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op/clip: handle zero Cube

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Currently this comes up with RRect/Border that has zero corners. It
improves them from ~250ns to ~170ns. While it's possible to check this
in RRect implementation, however it'll slow down calls with non-zero
corners.

Signed-off-by: Egon Elbre <egonelbre@gmail.com>
This commit is contained in:
Egon Elbre
2020-11-24 14:38:01 +01:00
committed by Elias Naur
parent 21dc27b115
commit 7bad76ad75
1 changed files with 3 additions and 0 deletions
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op/clip/clip.go
+3
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@@ -251,6 +251,9 @@ func (p *Path) arc(alpha float64, c f32.Point, rx, ry, beg, delta float64) {
// Cube records a cubic Bézier from the pen through // Cube records a cubic Bézier from the pen through
// two control points ending in to. // two control points ending in to.
func (p *Path) Cube(ctrl0, ctrl1, to f32.Point) { func (p *Path) Cube(ctrl0, ctrl1, to f32.Point) {
if ctrl0 == (f32.Point{}) && ctrl1 == (f32.Point{}) && to == (f32.Point{}) {
return
}
ctrl0 = ctrl0.Add(p.pen) ctrl0 = ctrl0.Add(p.pen)
ctrl1 = ctrl1.Add(p.pen) ctrl1 = ctrl1.Add(p.pen)
to = to.Add(p.pen) to = to.Add(p.pen)