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internal/restorable: improve pixelsForRestore usages

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Updates #2375
This commit is contained in:
Hajime Hoshi 2022-10-06 15:54:52 +09:00
parent c6b37e9809
commit cb79e4eabe
1 changed files with 11 additions and 8 deletions
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19
internal/restorable/image.go
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@ -493,12 +493,13 @@ func (i *Image) readPixelsFromGPU(graphicsDriver graphicsdriver.Graphics) error
}
if !r.Empty() {
var pix []byte
if needsRestoring() && i.needsRestoring() && r == image.Rect(0, 0, i.width, i.height) {
if needsRestoring() && i.needsRestoring() {
// pixelsForRestore can be reused as basePixels was invalidated.
if i.pixelsForRestore == nil {
i.pixelsForRestore = make([]byte, 4*r.Dx()*r.Dy())
l := 4 * r.Dx() * r.Dy()
if len(i.pixelsForRestore) < l {
i.pixelsForRestore = make([]byte, l)
}
pix = i.pixelsForRestore
pix = i.pixelsForRestore[:l]
} else {
pix = make([]byte, 4*r.Dx()*r.Dy())
}
@ -625,13 +626,15 @@ func (i *Image) restore(graphicsDriver graphicsdriver.Graphics) error {
if len(i.drawTrianglesHistory) > 0 {
i.basePixels = Pixels{}
// As basePixels was invalidated, pixelsForRestore can be reused.
if i.pixelsForRestore == nil {
i.pixelsForRestore = make([]byte, 4*w*h)
l := 4 * w * h
if len(i.pixelsForRestore) < l {
i.pixelsForRestore = make([]byte, l)
}
if err := gimg.ReadPixels(graphicsDriver, i.pixelsForRestore, 0, 0, w, h); err != nil {
pix := i.pixelsForRestore[:l]
if err := gimg.ReadPixels(graphicsDriver, pix, 0, 0, w, h); err != nil {
return err
}
i.basePixels.AddOrReplace(i.pixelsForRestore, 0, 0, w, h)
i.basePixels.AddOrReplace(pix, 0, 0, w, h)
}
i.image = gimg