This is a data holder for the specification of a background image for
grinview, consisting of a wildcard to match segments, and an image
name (which can be "").
This method, which should ONLY be called from the execute() method
of a command, suspends processing of further queued commands until
the display of the show has caught up with the screen.
The ExtensionParser interface defines methods that handle parsing of the
custom (user-defined) GRIN features, modifiers and commands
from text-based GRIN script.
Scale the x, y, width and heigh values according to the current
values of SCALE_X_FIELD, SCALE_Y_FIELD, SCALE_X_FACTOR_FIELD
and SCALE_Y_FACTOR_FIELD, storing them in scaledBounds.
Represents a show, with extra data that's useful for tools that run
on SE (big JDK), including a record of things like the names of private
features, and a list of all of the features and segments.
This should not be directly called by clients of the GRIN
framework, unless it is done from the animation thread (within
a command body, or inside an implementation of Director.nextFrame()).
Flags that some of the pixels in the area to be drawn might
be transparent or semi-transparent, either because they're
not drawn to, or because
they're drawn to in SrcOver mode.