stan@b17b.INGR.COM (stan) (06/07/90)
I need to create a pair of pixmaps( sensitive and insensensitive) for a Motif
button. The second pixmap will be just like the first, except it should be
stippled using the background color. To accomplish this, I am calling
XCreatePixmapFromBitmapData twice, with the same data. Then I call
XFillRectangle with the appropriate gc to stipple the second pixmap.
I think I should be able to copy the first pixmap to the second
( using memcpy or some other low level routine ) and then call XFillRectangle
on the new pixmap. The problem here is I don't really know how much memory
the pixmap occupies.
It has also been suggested that I use XCreatePixmap and XCopyArea to create
the second pixmap.
Does anyone know which of these (or any other) methods would be faster?
--
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/___________________________________________\_________________________/mouse@LARRY.MCRCIM.MCGILL.EDU (der Mouse) (06/09/90)
> I need to create a pair of pixmaps( sensitive and insensensitive) for > a Motif button. The second pixmap will be just like the first, > except it should be stippled using the background color. To > accomplish this, I am calling XCreatePixmapFromBitmapData twice, with > the same data. Then I call XFillRectangle with the appropriate gc to > stipple the second pixmap. That's perfectly reasonable, though as you imply you've noticed, slightly inefficient (very inefficient if the thing is large). > I think I should be able to copy the first pixmap to the second ( > using memcpy or some other low level routine ) and then call > XFillRectangle on the new pixmap. The problem here is I don't really > know how much memory the pixmap occupies. There is a much more serious problem: in general, you, the client, do not have access to the memory occupied by the pixmap. All you have is an ID by which you identify the pixmap to the server in X requests. (I said "in general" because someone probably has a system where the client and server can use shared memory if they're on the same machine.) > It has also been suggested that I use XCreatePixmap and XCopyArea to > create the second pixmap. This is a much better way of doing it. It's the method I'd recommend. (Ie, XCreatePixmapFromBitmapData, XCreatePixmap, XCopyArea, XFillRectangle (plus some GC setup calls).) der Mouse old: mcgill-vision!mouse new: mouse@larry.mcrcim.mcgill.edu
bouguett@boulder.Colorado.EDU (Athman Bouguettaya) (06/11/90)
This question might have been asked before but I spent a fair amount of time trying to figure out how I could use a pixmap directly to set for instance the background of a window. I copied the gif file from an ftp site. I then used giftoxwud to get an x dump. I then used the xwudtoppm to get a pixmap. One more thing, The X manuals I have do not have anything about reading a Pixmap. Thank you in advance for your help. -Athman
kucharsk@number6.Solbourne.COM (William Kucharski) (06/11/90)
In article <22090@boulder.Colorado.EDU> bouguett@boulder.Colorado.EDU (Athman Bouguettaya) writes: >This question might have been asked before but I spent a fair >amount of time trying to figure out how I could use a pixmap >directly to set for instance the background of a window. I copied >the gif file from an ftp site. I then used giftoxwud to get an x >dump. I then used the xwudtoppm to get a pixmap. One more thing, >The X manuals I have do not have anything about reading a Pixmap. >Thank you in advance for your help. > >-Athman Ppm format within the pbmplus utilities is NOT an X pixmap format but a P)ortable P)ixM)ap format. You have to use some type of utility to convert data from the ppm format into an X format. Unfortunately there is no current standard X pixmap file format, but I believe there is work going on to create one. -- =============================================================================== | Internet: kucharsk@Solbourne.COM | William Kucharski | | uucp: ...!{boulder,sun,uunet}!stan!kucharsk | Solbourne Computer, Inc. | = The opinions above are mine alone and NOT those of Solbourne Computer, Inc. =