[cp-patches] FYI: JViewport optimization

[Roman Kennke]

This optimizes JViewport. The backingstore drawing mechanism created
images far too often. Now it only creates a new image when the actual
size of the viewport changed.

2005-10-12  Roman Kennke  <address@hidden>

        * javax/swing/JViewport.java
        (sizeChanged): A new flag, indicating when the size of the
        viewport has changed relative to the last painting operation.
        (reshape): Set sizeChanged flag if size has changed.
        (paintBackingStore): Only create new backingstore image when
        the size has changed.


/Roman

JViewport.diff
Description: Text Data