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internal/restorable: Avoid allocating new slices for drawTrianglesHistory

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This commit is contained in:
Hajime Hoshi 2021-01-30 19:13:03 +09:00
parent f73fdc9af5
commit 44bb004cb7
1 changed files with 7 additions and 7 deletions
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14
internal/restorable/image.go
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@ -190,7 +190,7 @@ func (i *Image) Extend(width, height int) *Image {
// Overwrite the history as if the image newImg is created only by ReplacePixels. Now drawTrianglesHistory
// and basePixels cannot be mixed.
newImg.drawTrianglesHistory = nil
newImg.drawTrianglesHistory = newImg.drawTrianglesHistory[:0]
newImg.basePixels = i.basePixels
newImg.stale = i.stale
@ -258,7 +258,7 @@ func (i *Image) BasePixelsForTesting() *Pixels {
// makeStale makes the image stale.
func (i *Image) makeStale() {
i.basePixels = Pixels{}
i.drawTrianglesHistory = nil
i.drawTrianglesHistory = i.drawTrianglesHistory[:0]
i.stale = true
// Don't have to call makeStale recursively here.
@ -308,7 +308,7 @@ func (i *Image) ReplacePixels(pixels []byte, x, y, width, height int) {
} else {
i.basePixels.Remove(0, 0, w, h)
}
i.drawTrianglesHistory = nil
i.drawTrianglesHistory = i.drawTrianglesHistory[:0]
i.stale = false
return
}
@ -489,7 +489,7 @@ func (i *Image) readPixelsFromGPU() error {
}
i.basePixels = Pixels{}
i.basePixels.AddOrReplace(pix, 0, 0, i.width, i.height)
i.drawTrianglesHistory = nil
i.drawTrianglesHistory = i.drawTrianglesHistory[:0]
i.stale = false
return nil
}
@ -569,7 +569,7 @@ func (i *Image) restore() error {
// be changed.
i.image = graphicscommand.NewScreenFramebufferImage(w, h)
i.basePixels = Pixels{}
i.drawTrianglesHistory = nil
i.drawTrianglesHistory = i.drawTrianglesHistory[:0]
i.stale = false
return nil
}
@ -620,7 +620,7 @@ func (i *Image) restore() error {
}
i.image = gimg
i.drawTrianglesHistory = nil
i.drawTrianglesHistory = i.drawTrianglesHistory[:0]
i.stale = false
return nil
}
@ -633,7 +633,7 @@ func (i *Image) Dispose() {
i.image.Dispose()
i.image = nil
i.basePixels = Pixels{}
i.drawTrianglesHistory = nil
i.drawTrianglesHistory = i.drawTrianglesHistory[:0]
i.stale = false
}