joejulian/gio-patched
1
0
Fork 0
forked from joejulian/gio
Code Pull Requests 1 Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files
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) {
font/opentype/opentype_test.go
+7 -7
View File
@@ -70,7 +70,7 @@ func TestCollectionAsFace(t *testing.T) {
// All shapes from the original fonts should be distinct because the glyphs are distinct, including the replacement
// glyphs.
distinctShapes := []clip.Op{shapeValid1, shapeInvalid1, shapeValid2, shapeInvalid2}
distinctShapes := []clip.PathSpec{shapeValid1, shapeInvalid1, shapeValid2, shapeInvalid2}
for i := 0; i < len(distinctShapes); i++ {
for j := i + 1; j < len(distinctShapes); j++ {
if areShapesEqual(distinctShapes[i], distinctShapes[j]) {
@@ -174,23 +174,23 @@ func mergeFonts(ttf1, ttf2 []byte) []byte {
}
// shapeRune uses a given Face to shape exactly one rune at a fixed size, then returns the resulting shape data.
func shapeRune(f text.Face, r rune) (clip.Op, error) {
func shapeRune(f text.Face, r rune) (clip.PathSpec, error) {
ppem := fixed.I(200)
lines, err := f.Layout(ppem, 2000, strings.NewReader(string(r)))
if err != nil {
return clip.Op{}, err
return clip.PathSpec{}, err
}
if len(lines) != 1 {
return clip.Op{}, fmt.Errorf("unexpected rendering for \"U+%08X\": got %d lines (expected: 1)", r, len(lines))
return clip.PathSpec{}, fmt.Errorf("unexpected rendering for \"U+%08X\": got %d lines (expected: 1)", r, len(lines))
}
return f.Shape(ppem, lines[0].Layout), nil
}
// areShapesEqual returns true iff both given text shapes are produced with identical operations.
func areShapesEqual(shape1, shape2 clip.Op) bool {
func areShapesEqual(shape1, shape2 clip.PathSpec) bool {
var ops1, ops2 op.Ops
shape1.Push(&ops1).Pop()
shape2.Push(&ops2).Pop()
clip.Outline{Path: shape1}.Op().Push(&ops1).Pop()
clip.Outline{Path: shape2}.Op().Push(&ops2).Pop()
var r1, r2 ops.Reader
r1.Reset(&ops1.Internal)
r2.Reset(&ops2.Internal)