Hi,
I am new to GUI programming, and would like some pointers to the
best way in achieving something.
I need to develop Display window which can a number of coloured layers.
( the various layers used in IC design).
Where each layer overlaps another, I want to see the correct ANDING of
the colours.
I need to be able to repaint with an odd layer removed from display.
I can see that if I have multiple pixmaps (one for each layer to be
displayed), but just sending the desired pixmaps to the screen I should
be able to achieve this.
Therefore..
1. Can multiple pixmaps be drawn to a single drawing area ?
2. Can the overlapping (colour ANDing) automatically achieved ?
I have somebooks on gtk+, and they talk about pixmaps having depth,
but never then explain how to use them :-( Is this route a potential
solution ??
I have tried painting different overlapping rectangles of different colours
(with opacity varied) to the same pixmap, and do not see any colour anding: the
last colour displayed alway oblitorates underlying colours.
I look forward to your combined wisdom...
Many thanks in advance..
Colin Thomas
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| Colin Thomas.
| Email : [EMAIL PROTECTED]
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