On Thu, 28 Feb 2002, Domen Stangar wrote:
> Hello,
> can anyone explain me what is the difference between Xshm and normal shm
> so if I create XImages in shm and then create Pixmaps for each
> display(cannot share pixmaps) between displays or with XShmCreatePixmap can
> this be shared ?
I haven't thought about it, but I see no reason why you wouldn't
be able to create XImages or shm Pixmaps on two local displays using
the same shm segment.
> So is this extension any good if i can do it manually by sharing XImage.
>
> and more..
> How to create Clip Image other way like this :
> for(y=0;y<a.height;y++) for(x=0;x<a.width;x++)
> XPutPixel(xim,x,y,XGetPixel(b,x,y)?1 : 0);
> Or with words
> How to create clip image from pixmap with colors(black is transperent).
>
I'm not sure I understand what you're asking. You want to copy
a Pixmap into and XImage? X(Shm)GetImage will do that. Or was
the pixmap deep and the XImage a one bit mask? There's no Xlib
function to return a mask from a Pixmap and transparency key.
You'd have to do that manually, like the way you are doing.
It's inefficient, but generally there's no need to do something
like that.
Mark.
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