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text/v2: refactoring

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This commit is contained in:
Hajime Hoshi 2023-11-13 01:31:25 +09:00
parent 7c40b5f922
commit 9735687d3e
1 changed files with 12 additions and 10 deletions
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22
text/v2/std.go
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@ -95,15 +95,17 @@ func (s *StdFace) advance(text string) float64 {
func (s *StdFace) appendGlyphs(glyphs []Glyph, text string, originX, originY float64) []Glyph {
s.copyCheck()
x := float64ToFixed26_6(originX)
y := float64ToFixed26_6(originY)
origin := fixed.Point26_6{
X: float64ToFixed26_6(originX),
Y: float64ToFixed26_6(originY),
}
prevR := rune(-1)
for i, r := range text {
if prevR >= 0 {
x += s.f.Kern(prevR, r)
origin.X += s.f.Kern(prevR, r)
}
img, imgX, imgY, a := s.glyphImage(r, x, y)
img, imgX, imgY, a := s.glyphImage(r, origin)
if img != nil {
// Adjust the position to the integers.
// The current glyph images assume that they are rendered on integer positions so far.
@ -115,18 +117,18 @@ func (s *StdFace) appendGlyphs(glyphs []Glyph, text string, originX, originY flo
Y: imgY,
})
}
x += a
origin.X += a
prevR = r
}
return glyphs
}
func (s *StdFace) glyphImage(r rune, x, y fixed.Int26_6) (*ebiten.Image, float64, float64, fixed.Int26_6) {
func (s *StdFace) glyphImage(r rune, origin fixed.Point26_6) (*ebiten.Image, float64, float64, fixed.Int26_6) {
b, a, _ := s.f.GlyphBounds(r)
offset := fixed.Point26_6{
X: (adjustOffsetGranularity(x) + b.Min.X) & ((1 << 6) - 1),
Y: (fixed.I(y.Floor()) + b.Min.Y) & ((1 << 6) - 1),
X: (adjustOffsetGranularity(origin.X) + b.Min.X) & ((1 << 6) - 1),
Y: (fixed.I(origin.Y.Floor()) + b.Min.Y) & ((1 << 6) - 1),
}
key := glyphImageCacheKey{
rune: r,
@ -136,8 +138,8 @@ func (s *StdFace) glyphImage(r rune, x, y fixed.Int26_6) (*ebiten.Image, float64
img := theGlyphImageCache.getOrCreate(s, key, func() *ebiten.Image {
return s.glyphImageImpl(r, offset)
})
imgX := fixed26_6ToFloat64(x + b.Min.X - offset.X)
imgY := fixed26_6ToFloat64(y + b.Min.Y - offset.Y)
imgX := fixed26_6ToFloat64(origin.X + b.Min.X - offset.X)
imgY := fixed26_6ToFloat64(origin.Y + b.Min.Y - offset.Y)
return img, imgX, imgY, a
}