Re: [R200] Nearly all xscreensavers GL flicker
On Thu, 24 Feb 2005, Michel [ISO-8859-1] Dnzer wrote: [ Please don't follow up just to me privately ] On Thu, 2005-02-24 at 14:26 +0100, Marcello Maggioni wrote: On Wed, 23 Feb 2005 23:02:37 -0500, Michel Dnzer [EMAIL PROTECTED] wrote: On Wed, 2005-02-23 at 20:50 +0100, Marcello Maggioni wrote: I've a problem with lastest DRI (from CVS) drivers and Xscreensavers that use OpenGL. I've tried nearly all of them , from Bubble 3D to Rubik Cube all these simply flicker like hell when are executed . If you're running them manually with -root, it's probably because the root window isn't double buffered. Otherwise, does disabling colour tiling or page flipping make a difference? I run them from KDE Control Center [...] IIRC some versions of KDE are known to be buggy in this regard. Yep - if you start them from KDE they are all run without double buffering. (or at least this appeared to be so each time I tried) I have no idea why. Try running xscreensaver directly. best Vladimir Dergachev -- Earthling Michel Dnzer | Debian (powerpc), X and DRI developer Libre software enthusiast| http://svcs.affero.net/rm.php?r=daenzer --- SF email is sponsored by - The IT Product Guide Read honest candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95alloc_id396op=click -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
Re: [R200] Nearly all xscreensavers GL flicker
On Thu, 24 Feb 2005 11:38:10 -0500 (EST), Vladimir Dergachev [EMAIL PROTECTED] wrote: On Thu, 24 Feb 2005, Michel [ISO-8859-1] Dnzer wrote: [ Please don't follow up just to me privately ] On Thu, 2005-02-24 at 14:26 +0100, Marcello Maggioni wrote: On Wed, 23 Feb 2005 23:02:37 -0500, Michel Dnzer [EMAIL PROTECTED] wrote: On Wed, 2005-02-23 at 20:50 +0100, Marcello Maggioni wrote: I've a problem with lastest DRI (from CVS) drivers and Xscreensavers that use OpenGL. I've tried nearly all of them , from Bubble 3D to Rubik Cube all these simply flicker like hell when are executed . If you're running them manually with -root, it's probably because the root window isn't double buffered. Otherwise, does disabling colour tiling or page flipping make a difference? I run them from KDE Control Center [...] IIRC some versions of KDE are known to be buggy in this regard. Yep - if you start them from KDE they are all run without double buffering. (or at least this appeared to be so each time I tried) I have no idea why. Try running xscreensaver directly. best Vladimir Dergachev -- Earthling Michel Dnzer | Debian (powerpc), X and DRI developer Libre software enthusiast| http://svcs.affero.net/rm.php?r=daenzer --- SF email is sponsored by - The IT Product Guide Read honest candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95alloc_id396op=click -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel With XSCREENSAVER alone it effectively runs without problems , but I wonder why ... There's a logical explanation for this?? O_o Bye Marcello --- SF email is sponsored by - The IT Product Guide Read honest candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95alloc_id396op=click -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
Re: [R200] Nearly all xscreensavers GL flicker
[ Please don't follow up just to me privately ] On Thu, 2005-02-24 at 14:26 +0100, Marcello Maggioni wrote: On Wed, 23 Feb 2005 23:02:37 -0500, Michel Dnzer [EMAIL PROTECTED] wrote: On Wed, 2005-02-23 at 20:50 +0100, Marcello Maggioni wrote: I've a problem with lastest DRI (from CVS) drivers and Xscreensavers that use OpenGL. I've tried nearly all of them , from Bubble 3D to Rubik Cube all these simply flicker like hell when are executed . If you're running them manually with -root, it's probably because the root window isn't double buffered. Otherwise, does disabling colour tiling or page flipping make a difference? I run them from KDE Control Center [...] IIRC some versions of KDE are known to be buggy in this regard. -- Earthling Michel Dnzer | Debian (powerpc), X and DRI developer Libre software enthusiast| http://svcs.affero.net/rm.php?r=daenzer --- SF email is sponsored by - The IT Product Guide Read honest candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95alloc_id396op=click -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
Re: [R200] Nearly all xscreensavers GL flicker
On Thu, 24 Feb 2005 10:30:03 -0500, Michel Dänzer [EMAIL PROTECTED] wrote: [ Please don't follow up just to me privately ] Sorry, I just pushed the wrong button :P IIRC some versions of KDE are known to be buggy in this regard. Really? I'll try to run the screensaver separately and then report --- SF email is sponsored by - The IT Product Guide Read honest candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95alloc_id396op=click -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
Re: [R200] Nearly all xscreensavers GL flicker
Marcello Maggioni wrote: Try running xscreensaver directly. With XSCREENSAVER alone it effectively runs without problems , but I wonder why ... There's a logical explanation for this?? O_o IIRC the root window isn't double buffered, thus you can't use that in a useful way for 3D. Roland --- SF email is sponsored by - The IT Product Guide Read honest candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595alloc_id=14396op=click -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
Re: [R200] Nearly all xscreensavers GL flicker
Am Freitag, 25. Februar 2005 16:47 schrieb Adam Jackson: On Thursday 24 February 2005 13:27, Marcello Maggioni wrote: With XSCREENSAVER alone it effectively runs without problems , but I wonder why ... There's a logical explanation for this?? O_o Yeah. KDE's screensaver module probably opens its own fullscreen window and tells the screensaver to draw on that. Since the window is already created the screensaver can't change its visual, which means if the window was created in a single buffer visual you're stuck. So someone should send a bug report to fix that before KDE 3.4 arise...;-) Greetings, Dieter --- SF email is sponsored by - The IT Product Guide Read honest candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595alloc_id=14396op=click -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
Re: [R200] Nearly all xscreensavers GL flicker
On Friday 25 February 2005 12:54, Stephan Kulow wrote:
Am Friday 25 February 2005 18:03 schrieb Dieter Ntzel:
Am Freitag, 25. Februar 2005 16:47 schrieb Adam Jackson:
On Thursday 24 February 2005 13:27, Marcello Maggioni wrote:
With XSCREENSAVER alone it effectively runs without problems , but I
wonder why ...
There's a logical explanation for this?? O_o
Yeah. KDE's screensaver module probably opens its own fullscreen
window and tells the screensaver to draw on that. Since the window is
already created the screensaver can't change its visual, which means if
the window was created in a single buffer visual you're stuck.
So someone should send a bug report to fix that before KDE 3.4
arise...;-)
How? We create a fullscreen window for all screen savers.
Run glxinfo and look at the output near the bottom:
visual x bf lv rg d st colorbuffer ax dp st accumbuffer ms cav
id dep cl sp sz l ci b ro r g b a bf th cl r g b a ns b eat
--
0x23 24 tc 0 24 0 r y . 8 8 8 0 0 0 0 0 0 0 0 0 0 None
0x24 24 tc 0 24 0 r . . 8 8 8 0 0 0 0 0 0 0 0 0 0 None
0x25 24 tc 0 24 0 r y . 8 8 8 0 0 24 8 0 0 0 0 0 0 None
0x26 24 tc 0 24 0 r . . 8 8 8 0 0 24 8 0 0 0 0 0 0 None
0x27 24 tc 0 24 0 r y . 8 8 8 0 0 0 0 16 16 16 0 0 0 Slow
0x28 24 tc 0 24 0 r . . 8 8 8 0 0 0 0 16 16 16 0 0 0 Slow
0x29 24 tc 0 24 0 r y . 8 8 8 0 0 24 8 16 16 16 0 0 0 Slow
0x2a 24 tc 0 24 0 r . . 8 8 8 0 0 24 8 16 16 16 0 0 0 Slow
Note the 'db' column, indicating a double-buffered visual. By default X
windows are not created in double-buffered visuals. The way to find a
double-buffered visual is something like:
int attribs[] = { GLX_DOUBLEBUFFER, /* ..., */ None };
XVisualInfo *vis = glXChooseVisual(dpy, DefaultScreen(dpy), attribs);
There's also a way to do this within the DBE extension, which one or two of
the xscreensaver hacks want, but I don't know it offhand. I expect Qt has an
idiom for this as well.
- ajax
pgpWxlZrSTHYi.pgp
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Re: [R200] Nearly all xscreensavers GL flicker
On Fri, 25 Feb 2005, Stephan Kulow wrote: Am Friday 25 February 2005 18:03 schrieb Dieter Nützel: Am Freitag, 25. Februar 2005 16:47 schrieb Adam Jackson: On Thursday 24 February 2005 13:27, Marcello Maggioni wrote: With XSCREENSAVER alone it effectively runs without problems , but I wonder why ... There's a logical explanation for this?? O_o Yeah. KDE's screensaver module probably opens its own fullscreen window and tells the screensaver to draw on that. Since the window is already created the screensaver can't change its visual, which means if the window was created in a single buffer visual you're stuck. So someone should send a bug report to fix that before KDE 3.4 arise...;-) How? We create a fullscreen window for all screen savers. Wouldn't it be possible to create a double-buffered subwindow for those that use GL ? A hack, admittedly... best Vladimir Dergachev Greetings, Stephan
Re: [R200] Nearly all xscreensavers GL flicker
On Wed, 2005-02-23 at 20:50 +0100, Marcello Maggioni wrote: I've a problem with lastest DRI (from CVS) drivers and Xscreensavers that use OpenGL. I've tried nearly all of them , from Bubble 3D to Rubik Cube all these simply flicker like hell when are executed . If you're running them manually with -root, it's probably because the root window isn't double buffered. Otherwise, does disabling colour tiling or page flipping make a difference? -- Earthling Michel Dnzer | Debian (powerpc), X and DRI developer Libre software enthusiast| http://svcs.affero.net/rm.php?r=daenzer --- SF email is sponsored by - The IT Product Guide Read honest candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95alloc_id396op=click -- ___ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
