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graphics: Swap error checking

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This commit is contained in:
Hajime Hoshi 2018-03-02 23:59:04 +09:00
parent d60f662f57
commit 046a6cd014
1 changed files with 3 additions and 3 deletions
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6
image.go
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@ -149,12 +149,12 @@ func (i *Image) isDisposed() bool {
// DrawImage always returns nil as of 1.5.0-alpha.
func (i *Image) DrawImage(img *Image, options *DrawImageOptions) error {
i.copyCheck()
if i == img {
panic("ebiten: Image.DrawImage: img must be different from the receiver")
}
if img.isDisposed() {
panic("ebiten: the given image to DrawImage must not be disposed")
}
if i == img {
panic("ebiten: Image.DrawImage: img must be different from the receiver")
}
if i.isDisposed() {
return nil
}