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restorable: Add comments

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This commit is contained in:
Hajime Hoshi 2017-09-15 00:39:49 +09:00
parent 80940f9070
commit 2881d3fc4c
1 changed files with 2 additions and 0 deletions
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internal/restorable/image.go
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@ -93,6 +93,8 @@ func NewImage(width, height int, filter opengl.Filter, volatile bool) *Image {
}
// NewImageFromImage creates an image with source image.
//
// width/height might be different from source's size.
func NewImageFromImage(source *image.RGBA, width, height int, filter opengl.Filter) *Image {
w2, h2 := math.NextPowerOf2Int(width), math.NextPowerOf2Int(height)
p := make([]uint8, 4*w2*h2)