[Xcb] Issues with XCB and OpenGL

[Xavier Bigand]

Up.

Nobody know how to fix it?


On Sun, Dec 1, 2013 at 5:46 PM, Uli Schlachter <psychon at znc.in> wrote:

> On 01.12.2013 17:12, Xavier Bigand wrote:
>
>> I am trying to make the XCB with OpenGL sample work :
>> http://xcb.freedesktop.org/opengl/
>>
>> I am getting the following error :
>> X Error of failed request:  BadWindow (invalid Window parameter)
>>    Major opcode of failed request:  154 (GLX)
>>    Minor opcode of failed request:  31 (X_GLXCreateWindow)
>>    Resource id in failed request:  0x2e00004
>>    Serial number of failed request:  26
>>    Current serial number in output stream:  30
>>
>>
>> I have a Mint 16 with open sources driver and an ATI card.
>>
>> Does it come from the sample code or my configuration?
>>
>
> Disclaimer: I have no clue about OpenGL.
>
> I replaced the following code (line 76 and following):
>
>         /* Select first framebuffer config and query visualID */
>         GLXFBConfig fb_config = fb_configs[0];
>         glXGetFBConfigAttrib(display, fb_config, GLX_VISUAL_ID ,
> &visualID);
>
> with this:
>
>         /* Select first framebuffer config and query visualID */
>         GLXFBConfig fb_config;
>         int config = 0;
>         for (config = 0; config < num_fb_configs; config++) {
>                 fb_config = fb_configs[config];
>                 visualID = 0;
>                 glXGetFBConfigAttrib(display, fb_config, GLX_VISUAL_ID ,
> &visualID);
>                 if (visualID != 0)
>                         break;
>                 fprintf(stderr, "config %d of %d failed\n", config,
> num_fb_configs);
>         }
>
> This gives me the following output (and then opens a blue window):
>
> config 0 of 24 failed
> config 1 of 24 failed
> config 2 of 24 failed
> config 3 of 24 failed
>
> Cheers,
> Uli
>
> P.S.: Could someone with more clue look at this and perhaps improve the
> example in the wiki? There must be a better way to check if
> glXGetFBConfigAttrib() failed.
> P.P.S.: I left the "select the first[...]" comment in place, although it
> is now wrong.
>
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