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text/v2: add Glyph.OriginOffset{X,Y}

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Closes #3070
This commit is contained in:
Hajime Hoshi 2024-08-23 03:54:11 +09:00
parent 6056fc59eb
commit df266e8acf
4 changed files with 27 additions and 9 deletions
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20
examples/texti18n/main.go
View File

@ -122,7 +122,7 @@ func (g *Game) Update() error {
}
func (g *Game) Draw(screen *ebiten.Image) {
ebitenutil.DebugPrint(screen, "Press O to show/hide origins")
ebitenutil.DebugPrint(screen, "Press O to show/hide origins.\nRed points are the original origin positions.\nThe green points are the origin positions after applying the offset.")
gray := color.RGBA{0x80, 0x80, 0x80, 0xff}
@ -134,7 +134,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
Size: 24,
Language: language.Arabic,
}
x, y := screenWidth-20, 40
x, y := screenWidth-20, 50
w, h := text.Measure(arabicText, f, 0)
// The left upper point is not x but x-w, since the text runs in the rigth-to-left direction.
vector.DrawFilledRect(screen, float32(x)-float32(w), float32(y), float32(w), float32(h), gray, false)
@ -145,6 +145,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
if g.showOrigins {
op := &text.LayoutOptions{}
for _, g := range text.AppendGlyphs(nil, arabicText, f, op) {
vector.DrawFilledCircle(screen, float32(x)+float32(g.OriginX+g.OriginOffsetX), float32(y)+float32(g.OriginY+g.OriginOffsetY), 2, color.RGBA{0, 0xff, 0, 0xff}, true)
vector.DrawFilledCircle(screen, float32(x)+float32(g.OriginX), float32(y)+float32(g.OriginY), 2, color.RGBA{0xff, 0, 0, 0xff}, true)
}
}
@ -156,7 +157,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
Size: 24,
Language: language.Hindi,
}
x, y := 20, 100
x, y := 20, 110
w, h := text.Measure(hindiText, f, 0)
vector.DrawFilledRect(screen, float32(x), float32(y), float32(w), float32(h), gray, false)
op := &text.DrawOptions{}
@ -166,6 +167,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
if g.showOrigins {
op := &text.LayoutOptions{}
for _, g := range text.AppendGlyphs(nil, hindiText, f, op) {
vector.DrawFilledCircle(screen, float32(x)+float32(g.OriginX+g.OriginOffsetX), float32(y)+float32(g.OriginY+g.OriginOffsetY), 2, color.RGBA{0, 0xff, 0, 0xff}, true)
vector.DrawFilledCircle(screen, float32(x)+float32(g.OriginX), float32(y)+float32(g.OriginY), 2, color.RGBA{0xff, 0, 0, 0xff}, true)
}
}
@ -177,7 +179,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
Size: 24,
Language: language.Burmese,
}
x, y := 20, 160
x, y := 20, 170
w, h := text.Measure(myanmarText, f, 0)
vector.DrawFilledRect(screen, float32(x), float32(y), float32(w), float32(h), gray, false)
op := &text.DrawOptions{}
@ -187,6 +189,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
if g.showOrigins {
op := &text.LayoutOptions{}
for _, g := range text.AppendGlyphs(nil, myanmarText, f, op) {
vector.DrawFilledCircle(screen, float32(x)+float32(g.OriginX+g.OriginOffsetX), float32(y)+float32(g.OriginY+g.OriginOffsetY), 2, color.RGBA{0, 0xff, 0, 0xff}, true)
vector.DrawFilledCircle(screen, float32(x)+float32(g.OriginX), float32(y)+float32(g.OriginY), 2, color.RGBA{0xff, 0, 0, 0xff}, true)
}
}
@ -198,7 +201,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
Size: 24,
Language: language.Thai,
}
x, y := 20, 220
x, y := 20, 230
w, h := text.Measure(thaiText, f, 0)
vector.DrawFilledRect(screen, float32(x), float32(y), float32(w), float32(h), gray, false)
op := &text.DrawOptions{}
@ -208,6 +211,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
if g.showOrigins {
op := &text.LayoutOptions{}
for _, g := range text.AppendGlyphs(nil, thaiText, f, op) {
vector.DrawFilledCircle(screen, float32(x)+float32(g.OriginX+g.OriginOffsetX), float32(y)+float32(g.OriginY+g.OriginOffsetY), 2, color.RGBA{0, 0xff, 0, 0xff}, true)
vector.DrawFilledCircle(screen, float32(x)+float32(g.OriginX), float32(y)+float32(g.OriginY), 2, color.RGBA{0xff, 0, 0, 0xff}, true)
}
}
@ -223,7 +227,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
Script: language.MustParseScript("Mong"),
}
const lineSpacing = 48
x, y := 20, 280
x, y := 20, 290
w, h := text.Measure(mongolianText, f, lineSpacing)
vector.DrawFilledRect(screen, float32(x), float32(y), float32(w), float32(h), gray, false)
op := &text.DrawOptions{}
@ -235,6 +239,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
op := &text.LayoutOptions{}
op.LineSpacing = lineSpacing
for _, g := range text.AppendGlyphs(nil, mongolianText, f, op) {
vector.DrawFilledCircle(screen, float32(x)+float32(g.OriginX+g.OriginOffsetX), float32(y)+float32(g.OriginY+g.OriginOffsetY), 2, color.RGBA{0, 0xff, 0, 0xff}, true)
vector.DrawFilledCircle(screen, float32(x)+float32(g.OriginX), float32(y)+float32(g.OriginY), 2, color.RGBA{0xff, 0, 0, 0xff}, true)
}
}
@ -248,7 +253,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
Language: language.Japanese,
}
const lineSpacing = 48
x, y := screenWidth-20, 280
x, y := screenWidth-20, 290
w, h := text.Measure(japaneseText, f, lineSpacing)
// The left upper point is not x but x-w, since the text runs in the rigth-to-left direction as the secondary direction.
vector.DrawFilledRect(screen, float32(x)-float32(w), float32(y), float32(w), float32(h), gray, false)
@ -262,6 +267,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
op.LineSpacing = lineSpacing
for _, g := range text.AppendGlyphs(nil, japaneseText, f, op) {
vector.DrawFilledCircle(screen, float32(x)+float32(g.OriginX), float32(y)+float32(g.OriginY), 2, color.RGBA{0xff, 0, 0, 0xff}, true)
vector.DrawFilledCircle(screen, float32(x)+float32(g.OriginX+g.OriginOffsetX), float32(y)+float32(g.OriginY+g.OriginOffsetY), 2, color.RGBA{0, 0xff, 0, 0xff}, true)
}
}
}

6
text/v2/gotext.go
View File

@ -318,8 +318,10 @@ func (g *GoTextFace) appendGlyphsForLine(glyphs []Glyph, line string, indexOffse
Image: img,
X: float64(imgX),
Y: float64(imgY),
OriginX: fixed26_6ToFloat64(o.X),
OriginY: fixed26_6ToFloat64(o.Y),
OriginX: fixed26_6ToFloat64(origin.X),
OriginY: fixed26_6ToFloat64(origin.Y),
OriginOffsetX: fixed26_6ToFloat64(glyph.shapingGlyph.XOffset),
OriginOffsetY: fixed26_6ToFloat64(-glyph.shapingGlyph.YOffset),
})
origin = origin.Add(fixed.Point26_6{
X: glyph.shapingGlyph.XAdvance,

2
text/v2/gox.go
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@ -126,6 +126,8 @@ func (s *GoXFace) appendGlyphsForLine(glyphs []Glyph, line string, indexOffset i
Y: float64(imgY),
OriginX: fixed26_6ToFloat64(origin.X),
OriginY: fixed26_6ToFloat64(origin.Y),
OriginOffsetX: 0,
OriginOffsetY: 0,
})
origin.X += a
prevR = r

8
text/v2/text.go
View File

@ -147,6 +147,14 @@ type Glyph struct {
// OriginY is the Y position of the origin of this glyph.
OriginY float64
// OriginOffsetX is the adjustment value to the X position of the origin of this glyph.
// OriginOffsetX is usually 0, but can be non-zero for some special glyphs or glyphs in the vertical text layout.
OriginOffsetX float64
// OriginOffsetY is the adjustment value to the Y position of the origin of this glyph.
// OriginOffsetY is usually 0, but can be non-zero for some special glyphs or glyphs in the vertical text layout.
OriginOffsetY float64
}
// Advance returns the advanced distance from the origin position when rendering the given text with the given face.