Method Decode

internal/attachments/processor.go:35–35

Decode reads bytes from r and returns the decoded image plus the detected format ("png", "jpeg", "gif", "bmp", "tiff", …). The returned format is the canonical lowercase name; callers can pass it back to Encode unchanged. If r holds bytes that this backend can't decode, the error wraps ErrUnsupporte

(r io.Reader)

	// it back to Encode unchanged. If r holds bytes that this backend
	// can't decode, the error wraps ErrUnsupportedFormat.
	Decode(r io.Reader) (img image.Image, format string, err error)

	// Resize returns a new image with the longer edge fitted to maxLong,
	// preserving aspect ratio. Images already within maxLong are