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Code Pull Requests 1 Activity

text,widget,opentype: change text.Face.Shape to return a clip.PathSpec

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With this change, the Shape function returns a clip.PathSpec
instead of a clip.Outline op. It is then possible to create
a clip.Outline or clip.Stroke op to fill the text path or
draw its stroke.

Signed-off-by: Christophe Meessen <meessen@cppm.in2p3.fr>
This commit is contained in:
Christophe Meessen
2021-12-16 17:15:01 +01:00
committed by Elias Naur
parent 3db11cbaad
commit a34e239c04
8 changed files with 25 additions and 28 deletions
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font/opentype/opentype.go
+5 -8
View File
@@ -119,7 +119,7 @@ func (f *Font) Layout(ppem fixed.Int26_6, maxWidth int, txt io.Reader) ([]text.L
return layoutText(&buf, ppem, maxWidth, fonts, glyphs)
}
func (f *Font) Shape(ppem fixed.Int26_6, str text.Layout) clip.Op {
func (f *Font) Shape(ppem fixed.Int26_6, str text.Layout) clip.PathSpec {
var buf sfnt.Buffer
return textPath(&buf, ppem, []*opentype{{Font: f.font, Hinting: font.HintingFull}}, str)
}
@@ -139,7 +139,7 @@ func (c *Collection) Layout(ppem fixed.Int26_6, maxWidth int, txt io.Reader) ([]
return layoutText(&buf, ppem, maxWidth, c.fonts, glyphs)
}
func (c *Collection) Shape(ppem fixed.Int26_6, str text.Layout) clip.Op {
func (c *Collection) Shape(ppem fixed.Int26_6, str text.Layout) clip.PathSpec {
var buf sfnt.Buffer
return textPath(&buf, ppem, c.fonts, str)
}
@@ -261,12 +261,11 @@ func toLayout(glyphs []glyph) text.Layout {
return text.Layout{Text: buf.String(), Advances: advs}
}
func textPath(buf *sfnt.Buffer, ppem fixed.Int26_6, fonts []*opentype, str text.Layout) clip.Op {
func textPath(buf *sfnt.Buffer, ppem fixed.Int26_6, fonts []*opentype, str text.Layout) clip.PathSpec {
var lastPos f32.Point
var builder clip.Path
ops := new(op.Ops)
var x fixed.Int26_6
builder.Begin(ops)
builder.Begin(new(op.Ops))
rune := 0
for _, r := range str.Text {
if !unicode.IsSpace(r) {
@@ -323,9 +322,7 @@ func textPath(buf *sfnt.Buffer, ppem fixed.Int26_6, fonts []*opentype, str text.
x += str.Advances[rune]
rune++
}
return clip.Outline{
Path: builder.End(),
}.Op()
return builder.End()
}
func readGlyphs(r io.Reader) ([]glyph, error) {