+ # Should the pixels RGB values be premultiplied by their alpha value at loading?
+ #
+ # All gamnit textures must have premultiplied alpha, it provides a better
+ # alpha blending, avoids artifacts and allows for additive blending.
+ #
+ # When at `true`, the default, pixels RGB values are premultiplied
+ # at loading. Set to `false` if pixels RGB values are already
+ # premultiplied in the source data.
+ #
+ # This value must be set before calling `load`.
+ var premultiply_alpha = true is writable
+