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>Fix the mouse grabbing</TITLE
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><A
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>5. Fix the mouse grabbing</A
></H1
><P
> Fix the mouse hide problem.
</P
><P
> The quake code, as it is, does not hide the mouse when you use it.
The pointer would remain visible and jitter around a fixed point in
the middle of the screen - very annoying. I found the following simple fix in
a mail archive about glx development at:
<A
HREF="http://lists.openprojects.net/pipermail/glx-dev/1999-October/000994.html"
TARGET="_top"
>http://lists.openprojects.net/pipermail/glx-dev/1999-October/000994.html</A
>
</P
><P
> See the patch listing and the link to download it below, or you can make the changes yourself.
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><PRE
CLASS="SCREEN"
> cd q1src/QW/client
edit the file: gl_vidlinuxglx.c
</PRE
></TD
></TR
></TABLE
>
</P
><P
> At the top of the function called install_grabs(void) (Line 234), add the
following code:
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><PRE
CLASS="SCREEN"
> static void install_grabs(void)
{
/* vars to make blank cursor */
Pixmap blank;
XColor dummy;
char data[1] = {0};
Cursor cursor;
/* make a blank cursor */
blank = XCreateBitmapFromData (dpy, win, data, 1, 1);
if(blank == None) fprintf(stderr, "error: out of memory.\n");
cursor = XCreatePixmapCursor(dpy, blank, blank, &dummy, &dummy, 0, 0);
XFreePixmap (dpy, blank);
Con_Printf("Cursor blanked.\n");
</PRE
></TD
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>
</P
><P
> The 8th parameter to XGrabPointer should be changed from
"None" to "cursor" to use the blank cursor:
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><TD
><PRE
CLASS="SCREEN"
> XGrabPointer(dpy, win,
True,
0,
GrabModeAsync, GrabModeAsync,
win,
cursor,
CurrentTime);
</PRE
></TD
></TR
></TABLE
>
(see: man XGrabPointer)
</P
><P
> This fix might work for the other client builds if you make
similar changes in the appropriate *vid*.c file. As it is,
this creates a memory leak as it allocates another Cursor
object everytime through and doesn't call XFreeCursor() but
this is probably not a problem since I don't think a 1x1
cursor is using much memory. If you want, you can apply the
following patch against <TT
CLASS="FILENAME"
>q1src/QW/client/gl_vidlinuxglx.c</TT
>
(<B
CLASS="COMMAND"
>patch gl_vidlinuxglx.c patchfile</B
>). Just cut and paste the
contents between the begin/end patchfile lines into a file
called gl_vidlinuxglx.c.patch (or whatever you want to call it). Save
patchfile in the <TT
CLASS="FILENAME"
>q1src/QW/client</TT
> directory where
gl_vidlinuxglx.c is. Then run the command:
<TABLE
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><TR
><TD
><PRE
CLASS="SCREEN"
> <B
CLASS="COMMAND"
>patch gl_vidlinuxglx.c gl_vidlinuxglx.c.patch</B
>
</PRE
></TD
></TR
></TABLE
>
</P
><P
> This patch file will make gl_vidlinuxglx.c such that it doesn't have any
memory leak. You can download this patch file at:
<A
HREF="http://www.comptechnews.com/~reaster/mini-HOWTO/LinuxGL-QuakeWorld-mini-HOWTO/gl_vidlinuxglx.c.patch"
TARGET="_top"
>http://www.comptechnews.com/~reaster/mini-HOWTO/LinuxGL-QuakeWorld-mini-HOWTO/gl_vidlinuxglx.c.patch</A
>.
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CLASS="SCREEN"
>*************************** begin patchfile ************************************
*** q1src-p/QW/client/gl_vidlinuxglx.c Tue Dec 21 18:45:54 1999
--- gl_vidlinuxglx.c Sat Aug 19 20:47:42 2000
***************
*** 1,22 ****
! /*
! Copyright (C) 1996-1997 Id Software, Inc.
!
! This program is free software; you can redistribute it and/or
! modify it under the terms of the GNU General Public License
! as published by the Free Software Foundation; either version 2
! of the License, or (at your option) any later version.
!
! This program is distributed in the hope that it will be useful,
! but WITHOUT ANY WARRANTY; without even the implied warranty of
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
!
! See the GNU General Public License for more details.
!
! You should have received a copy of the GNU General Public License
! along with this program; if not, write to the Free Software
! Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
!
! */
#include <termios.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
--- 1,22 ----
! /*
! Copyright (C) 1996-1997 Id Software, Inc.
!
! This program is free software; you can redistribute it and/or
! modify it under the terms of the GNU General Public License
! as published by the Free Software Foundation; either version 2
! of the License, or (at your option) any later version.
!
! This program is distributed in the hope that it will be useful,
! but WITHOUT ANY WARRANTY; without even the implied warranty of
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
!
! See the GNU General Public License for more details.
!
! You should have received a copy of the GNU General Public License
! along with this program; if not, write to the Free Software
! Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
!
! */
#include <termios.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
***************
*** 66,71 ****
--- 66,74 ----
static int scr_width, scr_height;
+ /* blank cursor - gets initialized in VID_Init, freed in VID_Shutdown */
+ Cursor cursor;
+
/*-----------------------------------------------------------------------*/
//int texture_mode = GL_NEAREST;
***************
*** 236,243 ****
0,
GrabModeAsync, GrabModeAsync,
win,
! None,
CurrentTime);
#ifdef USE_DGA
XF86DGADirectVideo(dpy, DefaultScreen(dpy), XF86DGADirectMouse);
--- 239,247 ----
0,
GrabModeAsync, GrabModeAsync,
win,
! cursor,
CurrentTime);
+ Con_Printf("Cursor blanked.\n");
#ifdef USE_DGA
XF86DGADirectVideo(dpy, DefaultScreen(dpy), XF86DGADirectMouse);
***************
*** 350,355 ****
--- 354,360 ----
if (!ctx)
return;
+ XFreeCursor(dpy, cursor);
glXDestroyContext(dpy, ctx);
}
***************
*** 602,608 ****
unsigned long mask;
Window root;
XVisualInfo *visinfo;
!
S_Init();
Cvar_RegisterVariable (&vid_mode);
--- 607,617 ----
unsigned long mask;
Window root;
XVisualInfo *visinfo;
! /* vars to make blank cursor */
! Pixmap blank;
! XColor dummy;
! char data[1] = {0};
!
S_Init();
Cvar_RegisterVariable (&vid_mode);
***************
*** 701,706 ****
--- 710,720 ----
Con_SafePrintf ("Video mode %dx%d initialized.\n", width, height);
vid.recalc_refdef = 1; // force a surface cache flush
+
+ blank = XCreateBitmapFromData(dpy, win, data, 1, 1);
+ if(blank == None) fprintf(stderr, "error: out of memory.\n");
+ cursor = XCreatePixmapCursor(dpy, blank, blank, &dummy, &dummy, 0, 0);
+ XFreePixmap(dpy, blank);
}
void Sys_SendKeyEvents(void)
*************************** end patchfile ************************************
</PRE
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>
</P
><P
> It is handy to bind some keys at the quake console to toggle mouse
grabbing:
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><PRE
CLASS="SCREEN"
> bind q "_windowed_mouse 0"
bind w "_windowed_mouse 1"
</PRE
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>
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