- If *optimize* is true this function sets optimization mode on. This
- currently means that under X, the device context will not try to set a
- pen or brush property if it is known to be set already. This approach
- can fall down if non-wxWidgets code is using the same device context
- or window, for example when the window is a panel on which the
- windowing system draws panel items. The wxWidgets device context
- 'memory' will now be out of step with reality.
+ Performs all necessary computations for given platform and context
+ type after each change of scale and origin parameters. Usually called
+ automatically internally after such changes.