[EMAIL PROTECTED] wrote:
Hi Dmitri,
First of all, did you determine (by profiling and
such) that it is expensive or is this your gut feeling? It is
important to work with correct data, and sometimes our
assumptions about performance implications may be
incorrect (I get this stuff wrong all the time).
I have not officially profiled it but it is visibly slower than I would like.
I'd still suggest to profile - you may be solving
a symptom instead of the cause.
Anyway, assuming that it is super-expensive to
repaint the whole thing, you can construct a clip shape
(which would be your bg rectangle minus your small
rectangles) and set it on the graphics context.
That way the area of the bg rectangle which isn't
covered by smaller rectangles only will be
repainted.
Shape clip may be an expensive operation, though
(depending on the pipeline), so I would still
suggest to profile (or just time) both
approaches.
Yes, but how do I remove areas from a clip region? I can only see how to set a
clip region to a Shape and the area around the smaller rectangles is not a
Shape.
Something along these lines
Area clip = new Area(new Rectangle(0,0,largeRectW,largeRectH));
clip.subtract(new Area(new Rectangle(,,,)));
g2d.clip(clip);
Thanks,
Dmitri
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