Xlib programming : getting a screenshot.

egag · 02-01-2006, 10:23 AM

hi,

i'm currently doing some programming using Xlib.
( building a simple window manager as a study-case )

i'm looking for a way to get a screenshot or grab a part of the screen.
programs like kde-snapshot use the QTtools to do that, but i don't
want to use QT.

does anyone know a way to get to the screendata directly, and
how to interpret that data,
or where to find some usable info on that topic ?

egag

Hko · 02-01-2006, 11:03 AM

Quote:

Originally Posted by egag

i'm currently doing some programming using Xlib.
( building a simple window manager as a study-case )

i'm looking for a way to get a screenshot or grab a part of the screen.
programs like kde-snapshot use the QTtools to do that, but i don't
want to use QT.

Both XFree86 and Xorg come with a small program to take screenshots. It called "xwd". Try having a look at the sources for xwd.

egag · 02-01-2006, 03:16 PM

that might be an option.
i don't think it's gonna be fast though.

but when i try to compile using parts of it,
i get strange syntax errors.

like ( from a header file ):

Code:

extern int GetMultiVisualRegions(Display *, Window, int, int,
unsigned int,unsigned int,
int *, int *, XVisualInfo **, int *, OverlayInfo  **,
int *, XVisualInfo ***, list_ptr *,list_ptr *, int *);

...gives ' error: syntax error before "OverlayInfo" '
while i don't see the error ?
( it's rather old code )

any idea what that can be ?

egag

egag · 02-01-2006, 03:47 PM

ah...solved that...
just the wrong sequence of includes.
thanks.

egag