On Friday, June 27, 2003 1:21 pm, Ethan Trevino wrote: > ///////Compiler Output////////////////// > # gcc -o screen screen.c -L/usr/X11R6/lib -lX11 -lXext -lXxf86vm > screen.c: In function `changeResolution': > screen.c:45: warning: passing arg 4 of `XF86VidModeGetModeLine' from > incompatible pointer type
---//--- /* The documentation says that XF86VidModeModeInfo wants a double * pointer. But the function definition says that it wants a triple * pointer. So, we declare a double and pass the address * XF86VidModeModeInfo **modes; */ ---//--- Huh? XF86VidModeModeInfo is a data type, not a function. What you're probably thinking of is XF86VidModeGetAllModeLines, whose prototype reads: Bool XF86VidModeGetAllModeLines(Display*, int, int*, XF86VidModeModeInfo***); (xc/include/X11/extensions/xf86vmode.h, lines 197-202) This is definitely different from what XF86VIDMODE(3X11) says, so yeah, there is a documentation bug here. (Somebody please fix this!) But your problem isn't with XF86VidModeGetAllModeLines. It's with XF86VidModeGetModeLine. Its fourth parameter is supposed to be an XF86VidModeModeLine*, but you give it an XF86VidModeModeInfo***. That's two too many *'s and you use ___Info instead of ___Line. ---//--- XF86VidModeModeInfo **modes, **oldMode; XF86VidModeGetModeLine(dpy, 0, &dotclock, &modes); ---//--- This alone should cause a SIGSEGV. (I know that if I were the computer, I wouldn't settle for anything less, hehehe.) > screen.c: In function `changeResBack': > screen.c:70: warning: passing arg 3 of `XF86VidModeSwitchToMode' from > incompatible pointer type > screen.c:71: warning: passing arg 3 of `XF86VidModeSwitchToMode' from > incompatible pointer type ---//--- XF86VidModeSwitchToMode(dpy,0,oldMode); XF86VidModeSwitchToMode(dpy,0,oldMode); ---//--- Both xc/include/X11/extensions/xf86vmode.h and XF86VIDMODE(3X11) say that XF86VidModeSwitchToMode's prototype is: "Bool XF86VidModeSwitchToMode(Display*, int, XF86VidModeModeInfo*);" But you pass it a XF86VidModeModeInfo**, with one too many *'s. Why is oldMode a ** anyway? Good luck. You might want to read the SwitchCB function in xc/programs/xvidtune/xvidtune.c . In 4.3.0, it starts on line 930. Also check out the xrandr program for a more flexible way of doing almost the same thing. (Except that xrandr doesn't appear to work at all with xinerama, so it's currently useless to me...) Heh, I just noticed a misspelling on line 5 of xrandr.c... -- Andy Goth | [EMAIL PROTECTED] | http://ioioio.net/ End communication. _______________________________________________ XFree86 mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xfree86
