[Dri-devel] RE: [andreasw@diamondmm.com: BUG# 101978]

[Kevin E. M. <ke...@pr...>]

Hi Andy,

I'm forwarding this bug report to the dri-devel list so that others can
comment on it.

Kevin


Andreas Wolf writes:
>               Anyway, sorry for contacting you this way, but maybe you guys
> can give us a hint on whether there is also a project on SourceForge to
> report DRI Mesa related OpenGL problems like the one described below?
> 
> Regards,
> Andy
> 
> Here is Carsten's attachement:
> Hi,
> 
> following problem exist since 3.9.17d and also in latest 3.9.18 snapshot:
> 
> When running an OpenGL demo using /usr/X11R6/lib/libGL.so , we get following
> error during XMakeCurrent():
> 
> X Error of failed request:  GLXBadContext                     Major opcode
> of failed request:  141 (GLX)                  Minor opcode of failed
> request:  5 (X_GLXMakeCurrent)       Serial number of failed request:  22
> Current serial number in output stream:  22               
> 
> By debugging XFree86, we found that the reason for that is the change of a
> macro in xc/programs/xserver/GL/mesa/include/GL/xmesa_xf86.h:
> 
> 3.19.17c
> #define GET_VISUAL_DEPTH(__v)   __v->screen_depth
> 
> 3.19.17d
> #define GET_VISUAL_DEPTH(__v)   __v->visinfo->nplanes
> 
> 
> This causes a fail in XMesaCreateWindowBuffer2() , from
> xc/programs/xserver/GL/mesa/src/X/xmesa1.c :
> 
> line 1639: 
> #ifdef XFree86Server
>    if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->bitsPerPixel) {
> #else
>    XGetWindowAttributes( v->display, w, &attr );
> 
>    if (GET_VISUAL_DEPTH(v) != attr.depth) {
> #endif
>       if (getenv("MESA_DEBUG")) {
>          fprintf(stderr, "XMesaCreateWindowBuffer: depth mismatch between
> visual and window!\n");
>       }
>       return NULL;
>    }
> 
> 
> GET_VISUAL_DEPTH(v) == 24
> ((XMesaDrawable)w)->bitsPerPixel == 32
> 
> 
> We double-checked this with a Permedia2 card and got the same result.
> 
> Is this a bug or are we doing anything wrong?
> 
> Thanks for your help
> 
> Carsten Rohde
> Software Design Engineer
> DIAMOND MULTIMEDIA
> E U R O P E A N  D I V I S I O N
> Voice	+49 8151 266 402
> Fax	+49 8151 266 430
> Email	CarstenR@DiamondMM.com