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restorable: Refactoring

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This commit is contained in:
Hajime Hoshi 2019-07-16 03:08:26 +09:00
parent 8ae2fef817
commit 349a290aa3
1 changed files with 11 additions and 25 deletions
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36
internal/restorable/image.go
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@ -332,18 +332,12 @@ func (i *Image) ReplacePixels(pixels []byte, x, y, width, height int) {
}
if x == 0 && y == 0 && width == w && height == h {
if pixels != nil {
if i.basePixels == nil {
i.basePixels = &Pixels{
length: 4 * w * h,
}
if i.basePixels == nil {
i.basePixels = &Pixels{
length: 4 * w * h,
}
i.basePixels.CopyFrom(pixels, 0)
} else {
// If basePixels is nil, the restored pixels are cleared.
// See restore() implementation.
i.basePixels = nil
}
i.basePixels.CopyFrom(pixels, 0)
i.drawTrianglesHistory = nil
i.stale = false
return
@ -358,23 +352,15 @@ func (i *Image) ReplacePixels(pixels []byte, x, y, width, height int) {
}
idx := 4 * (y*w + x)
if pixels != nil {
if i.basePixels == nil {
i.basePixels = &Pixels{
length: 4 * w * h,
}
}
for j := 0; j < height; j++ {
i.basePixels.CopyFrom(pixels[4*j*width:4*(j+1)*width], idx)
idx += 4 * w
}
} else if i.basePixels != nil {
zeros := make([]byte, 4*width)
for j := 0; j < height; j++ {
i.basePixels.CopyFrom(zeros, idx)
idx += 4 * w
if i.basePixels == nil {
i.basePixels = &Pixels{
length: 4 * w * h,
}
}
for j := 0; j < height; j++ {
i.basePixels.CopyFrom(pixels[4*j*width:4*(j+1)*width], idx)
idx += 4 * w
}
}
// DrawTriangles draws a given image img to the image.