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restorable: Refactoring

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This commit is contained in:
Hajime Hoshi 2018-12-27 03:06:44 +09:00
parent 62cdb93105
commit 4ba47eee32
1 changed files with 7 additions and 5 deletions
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12
internal/restorable/image.go
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@ -193,30 +193,32 @@ func (i *Image) ReplacePixels(pixels []byte, x, y, width, height int) {
i.stale = false
return
}
if len(i.drawImageHistory) > 0 {
i.makeStale()
return
}
if i.stale {
return
}
if i.basePixels == nil {
i.basePixels = make([]byte, 4*w*h)
}
idx := 4 * (y*w + x)
if pixels != nil {
if i.basePixels == nil {
i.basePixels = make([]byte, 4*w*h)
}
for j := 0; j < height; j++ {
copy(i.basePixels[idx:idx+4*width], pixels[4*j*width:4*(j+1)*width])
idx += 4 * w
}
} else {
} else if i.basePixels != nil {
zeros := make([]byte, 4*width)
for j := 0; j < height; j++ {
copy(i.basePixels[idx:idx+4*width], zeros)
idx += 4 * w
}
}
i.stale = false
}
// DrawImage draws a given image img to the image.