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graphics: Prefer ReplacePixels to DrawImage for small images

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This commit is contained in:
Hajime Hoshi 2018-05-03 11:51:58 +09:00
parent 03dcd94884
commit e53fa53f7d
1 changed files with 14 additions and 0 deletions
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14
image.go
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@ -96,6 +96,20 @@ func (i *Image) Fill(clr color.Color) error {
func (i *Image) fill(r, g, b, a uint8) {
wd, hd := i.Size()
if wd*hd <= 256 {
// Prefer ReplacePixels since ReplacePixels can keep the images shared.
pix := make([]uint8, 4*wd*hd)
for i := 0; i < wd*hd; i++ {
pix[4*i] = r
pix[4*i+1] = g
pix[4*i+2] = b
pix[4*i+3] = a
}
i.ReplacePixels(pix)
return
}
ws, hs := emptyImage.Size()
sw := float64(wd) / float64(ws)
sh := float64(hd) / float64(hs)