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text: Remove the optimization for GopherJS

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This commit is contained in:
Hajime Hoshi 2020-10-07 01:13:31 +09:00
parent 00f3d83d4c
commit a046700ae1
1 changed files with 7 additions and 9 deletions
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16
text/text.go
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@ -60,20 +60,19 @@ func drawGlyph(dst *ebiten.Image, face font.Face, r rune, img *ebiten.Image, x,
} }
var ( var (
// Use pointers as copying is expensive on GopherJS. glyphBoundsCache = map[font.Face]map[rune]fixed.Rectangle26_6{}
glyphBoundsCache = map[font.Face]map[rune]*fixed.Rectangle26_6{}
) )
func getGlyphBounds(face font.Face, r rune) *fixed.Rectangle26_6 { func getGlyphBounds(face font.Face, r rune) fixed.Rectangle26_6 {
if _, ok := glyphBoundsCache[face]; !ok { if _, ok := glyphBoundsCache[face]; !ok {
glyphBoundsCache[face] = map[rune]*fixed.Rectangle26_6{} glyphBoundsCache[face] = map[rune]fixed.Rectangle26_6{}
} }
if b, ok := glyphBoundsCache[face][r]; ok { if b, ok := glyphBoundsCache[face][r]; ok {
return b return b
} }
b, _, _ := face.GlyphBounds(r) b, _, _ := face.GlyphBounds(r)
glyphBoundsCache[face][r] = &b glyphBoundsCache[face][r] = b
return &b return b
} }
type glyphImageCacheEntry struct { type glyphImageCacheEntry struct {
@ -95,7 +94,7 @@ func getGlyphImages(face font.Face, runes []rune) []*ebiten.Image {
} }
imgs := make([]*ebiten.Image, len(runes)) imgs := make([]*ebiten.Image, len(runes))
glyphBounds := map[rune]*fixed.Rectangle26_6{} glyphBounds := map[rune]fixed.Rectangle26_6{}
neededGlyphIndices := map[int]rune{} neededGlyphIndices := map[int]rune{}
for i, r := range runes { for i, r := range runes {
if _, ok := emptyGlyphs[face][r]; ok { if _, ok := emptyGlyphs[face][r]; ok {
@ -262,8 +261,7 @@ func BoundString(face font.Face, text string) image.Rectangle {
continue continue
} }
bp := getGlyphBounds(face, r) b := getGlyphBounds(face, r)
b := *bp
b.Min.X += fx b.Min.X += fx
b.Max.X += fx b.Max.X += fx
b.Min.Y += fy b.Min.Y += fy