faster text rendering

tfriedel6 · Mar 16, 2020 · 421d388 · 421d388
1 parent 84d2b4f
commit 421d388
Showing 1 changed file with 8 additions and 7 deletions.
diff --git a/text.go b/text.go
@@ -234,6 +234,9 @@ func (cv *Canvas) StrokeText(str string, x, y float64) {
  frc.setFontSize(float64(cv.state.fontSize))
  fnt := cv.state.font.font
 
+ prevPath := cv.path
+ cv.BeginPath()
+
  for _, rn := range str {
  idx := fnt.Index(rn)
  if idx == 0 {
@@ -244,21 +247,19 @@ func (cv *Canvas) StrokeText(str string, x, y float64) {
  continue
  }
 
- cv.strokeRune(rn, vec{x, y})
+ cv.runePath(rn, vec{x, y})
 
  x += float64(advance) / 64
  }
+
+ cv.Stroke()
+ cv.path = prevPath
 }
 
-func (cv *Canvas) strokeRune(rn rune, pos vec) {
+func (cv *Canvas) runePath(rn rune, pos vec) {
  gb := &truetype.GlyphBuf{}
  gb.Load(cv.state.font.font, fixed.Int26_6(cv.state.fontSize*64), cv.state.font.font.Index(rn), font.HintingNone)
 
- prevPath := cv.path
- defer func() {
- cv.path = prevPath
- }()
-
  from := 0
  for _, to := range gb.Ends {
  ps := gb.Points[from:to]