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ebiten: give HintOverwriteDstRegion when BlendClear is used

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Hajime Hoshi 2024-09-08 14:52:07 +09:00
parent 4824dc0360
commit d84b030300
1 changed files with 2 additions and 1 deletions
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3
image.go
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@ -278,7 +278,8 @@ func (i *Image) DrawImage(img *Image, options *DrawImageOptions) {
// overwritesDstRegion reports whether the given parameters overwrite the destination region completely.
func overwritesDstRegion(blend Blend, dstRegion image.Rectangle, geoM GeoM, sx0, sy0, sx1, sy1 int) bool {
if blend != BlendCopy {
// TODO: More precisely, BlendFactorDestinationRGB, BlendFactorDestinationAlpha, and operations should be checked.
if blend != BlendCopy && blend != BlendClear {
return false
}
// Check the result vertices is not a rotated rectangle.