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op/clip: automatically close Path in Outlines

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Unclosed path segments in Path will be automatically
closed by a line.

Fixes: https://todo.sr.ht/~eliasnaur/gio/320
Signed-off-by: Pierre Curto <pierre.curto@gmail.com>
This commit is contained in:
Pierre Curto
2021-12-19 17:09:54 +01:00
committed by Elias Naur
parent 0117de71d3
commit 11bb86166a
10 changed files with 123 additions and 28 deletions
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gpu/internal/rendertest/render_test.go
+54
View File
@@ -357,6 +357,60 @@ func TestImageRGBA(t *testing.T) {
})
}
func TestGapsInPath(t *testing.T) {
ops := new(op.Ops)
var p clip.Path
p.Begin(ops)
// Unclosed square 1
p.MoveTo(f32.Point{X: 10})
p.LineTo(f32.Point{X: 40})
p.LineTo(f32.Point{X: 40, Y: 30})
p.LineTo(f32.Point{X: 10, Y: 30})
// Unclosed square 2
p.MoveTo(f32.Point{X: 50})
p.LineTo(f32.Point{X: 80})
p.LineTo(f32.Point{X: 80, Y: 30})
p.LineTo(f32.Point{X: 50, Y: 30})
spec := p.End()
t.Run("Stroke", func(t *testing.T) {
run(t,
func(ops *op.Ops) {
stack := clip.Stroke{
Path: spec,
Width: 2,
}.Op().Push(ops)
paint.ColorOp{Color: color.NRGBA{R: 255, A: 255}}.Add(ops)
paint.PaintOp{}.Add(ops)
stack.Pop()
},
func(r result) {
r.expect(10, 20, color.RGBA{})
r.expect(50, 20, color.RGBA{})
},
)
})
t.Run("Outline", func(t *testing.T) {
run(t,
func(ops *op.Ops) {
stack := clip.Outline{Path: spec}.Op().Push(ops)
paint.ColorOp{Color: color.NRGBA{R: 255, A: 255}}.Add(ops)
paint.PaintOp{}.Add(ops)
stack.Pop()
},
func(r result) {
r.expect(10, 20, colornames.Red)
r.expect(20, 20, colornames.Red)
r.expect(50, 20, colornames.Red)
r.expect(60, 20, colornames.Red)
},
)
})
}
// lerp calculates linear interpolation with color b and p.
func lerp(a, b f32color.RGBA, p float32) f32color.RGBA {
return f32color.RGBA{