A Boolean value indicating whether the image is opaque.
- macOS 10.0+
The value of this property is
YES if the image should be treated as fully opaque; otherwise,
NO to indicate the image may include some transparent regions.
Use this property to test whether an image representation completely covers the area within the rectangle given by the
The property value does not indicate whether the image has an alpha channel or if there is partial or complete transparency when drawing the image rep. Use the
alpha property to determine if the image has an alpha channel.