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op/clip: add Circle and Path.CubeTo

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Signed-off-by: Egon Elbre <egonelbre@gmail.com>
This commit is contained in:
Egon Elbre
2021-03-13 14:24:49 +02:00
committed by Elias Naur
parent 2b21b48a7c
commit ee8e267d22
2 changed files with 57 additions and 4 deletions
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op/clip/clip.go
+7 -4
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@@ -294,12 +294,15 @@ func (p *Path) arc(alpha float64, c f32.Point, rx, ry, beg, delta float64) {
// Cube records a cubic Bézier from the pen through
// two control points ending in to.
func (p *Path) Cube(ctrl0, ctrl1, to f32.Point) {
if ctrl0 == (f32.Point{}) && ctrl1 == (f32.Point{}) && to == (f32.Point{}) {
p.CubeTo(p.pen.Add(ctrl0), p.pen.Add(ctrl1), p.pen.Add(to))
}
// CubeTo records a cubic Bézier from the pen through
// two control points ending in to, with absolute coordinates.
func (p *Path) CubeTo(ctrl0, ctrl1, to f32.Point) {
if ctrl0 == p.pen && ctrl1 == p.pen && to == p.pen {
return
}
ctrl0 = ctrl0.Add(p.pen)
ctrl1 = ctrl1.Add(p.pen)
to = to.Add(p.pen)
data := p.ops.Write(scene.CommandSize + 4)
bo := binary.LittleEndian
bo.PutUint32(data[0:], uint32(p.contour))