X11/XLib - Pixmap: Is there a way to access the pixel buffer directly?
July 12, 2004 02:44 PM
I can't find the documentation of the XLib Pixmap structure.
I've seen that people ussually uses a XImage to do double buffering in X. I want to use a Pixmap instead. Is it possible/recommended?
EDIT: I want to access the pixmap buffer directly to plot pixel values myself.
Thanks.
[size="2"]I like the Walrus best.
July 13, 2004 02:07 PM
I know. You mean it is not possible?
Thanks.
Thanks.
[size="2"]I like the Walrus best.
July 13, 2004 03:13 PM
Look up the MIT-SHM extension or DGA (direct graphics access). They may do what you want.
July 13, 2004 11:06 PM
I'll take a look at it. Thank you.
[size="2"]I like the Walrus best.
July 17, 2004 10:45 AM
I just found out that Xrender is the way to do fast drawing in X.
Thankyou everyoneesss.
Thankyou everyoneesss.
[size="2"]I like the Walrus best.
1,099
July 17, 2004 11:27 AM
theoretically.
If the driver accelerates render, then you have every reason to use nothing but render and complete forget X's core graphics routines. It's superior.
Some render accelerations suck, however. NVIDIA's driver (last I checjed, long ago) was super buggy (w.r.t. render acceleration) and had to be manually enabled.
If the driver accelerates render, then you have every reason to use nothing but render and complete forget X's core graphics routines. It's superior.
Some render accelerations suck, however. NVIDIA's driver (last I checjed, long ago) was super buggy (w.r.t. render acceleration) and had to be manually enabled.
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