My application attaches a XFixes created reactangle to a window.
Therefore it does a XOpenDisplay() + XFixesCreateRegion() +
XCloseDisplay() inside one short function and done.
After the above outlined function resturns a call to XFixesFetchRegion()
from a outside observer forces the application to quit:
PropertyNotify : _NET_COLOR_REGIONS vvvvv 679x580+642+245 2
X Error of failed request: 179
Major opcode of failed request: 155 (XFIXES)
Minor opcode of failed request: 19 (XFixesFetchRegion)
Serial number of failed request: 7927
Current serial number in output stream: 7927
Any idea how to avoid a quit from XFixesFetchRegion()? A error message
would be enough. A exit in not acceptable to the application.
A minimal example application source code is attached.
kind regards
Kai-Uwe Behrmann
--
developing for colour management
www.behrmann.name + www.oyranos.org
/* !cc -Wall -g -o test_XFixes test_XFixes.c -lXfixes -lX11 */
#include <X11/Xlib.h>
#include <X11/extensions/Xfixes.h>
#include <stdio.h>
int main(int argc, char * argv[])
{
Display * display = XOpenDisplay(0);
XRectangle rec[2] = { { 0,0,0,0 }, { 0,0,0,0 } },
* rect = 0;
int nRect = 0;
XserverRegion reg = 0;
rec[0].x = 10;
rec[0].y = 20;
rec[0].width = 30;
rec[0].height = 40;
reg = XFixesCreateRegion( display, rec, 1);
rect = XFixesFetchRegion( display, reg, &nRect );
if(!nRect)
printf( "no region to be found %d\n", (int)reg );
else
printf( "rect found[%d]: %dx%d+%d+%d\n", (int)reg,
rect->width, rect->height, rect->x, rect->y );
XCloseDisplay( display ); display = 0;
printf( "close display\n\n" );
/* reopen */
printf( "reopening display and fetching the same region[%d]\n\n", (int)reg );
display = XOpenDisplay(0);
nRect = 0;
rect = XFixesFetchRegion( display, reg, &nRect );
if(!nRect)
printf( "no region to be found %d\n", (int)reg );
else
printf( "rect found: %dx%d+%d+%d\n",
rect->width, rect->height, rect->x, rect->y );
XCloseDisplay( display ); display = 0;
return 0;
}
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