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shareable: Add checks at operations for disposed images

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This commit is contained in:
Hajime Hoshi 2018-04-30 03:34:35 +09:00
parent 9df977dff8
commit ea1444ea7e
1 changed files with 9 additions and 0 deletions
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9
internal/shareable/shareable.go
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@ -131,6 +131,12 @@ func (i *Image) DrawImage(img *Image, sx0, sy0, sx1, sy1 int, geom *affine.GeoM,
backendsM.Lock() backendsM.Lock()
defer backendsM.Unlock() defer backendsM.Unlock()
if img.disposed {
panic("shareable: the drawing source image must not be disposed")
}
if i.disposed {
panic("shareable: the drawing target image must not be disposed")
}
if img.backend == nil { if img.backend == nil {
img.allocate(true) img.allocate(true)
} }
@ -155,6 +161,9 @@ func (i *Image) ReplacePixels(p []byte) {
backendsM.Lock() backendsM.Lock()
defer backendsM.Unlock() defer backendsM.Unlock()
if i.disposed {
panic("shareable: the image must not be disposed")
}
if i.backend == nil { if i.backend == nil {
i.allocate(true) i.allocate(true)
} }