graphics: Add doc about error to struct Image (#331)

This commit is contained in:
Hajime Hoshi 2017-03-04 02:30:10 +09:00
parent 6b70adf23b
commit a7d844ce5e

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@ -132,6 +132,8 @@ func (i *images) clearVolatileImages() {
// Image represents an image.
// The pixel format is alpha-premultiplied.
// Image implements image.Image.
//
// Functions of Image never returns error as of 1.5.0-alpha, and error values are always nil.
type Image struct {
impl *imageImpl
}