[Mesa-dev] [PATCH] glxglvnddispatch: Add missing dispatch for GetDriverConfig

[Kyle Brenneman]

On 05/17/2017 06:57 AM, Emil Velikov wrote:
> On 16 May 2017 at 22:42, Hans de Goede <hdegoede at redhat.com> wrote:
>> Hi,
>>
>>
>> On 05/16/2017 07:51 PM, Emil Velikov wrote:
>>> Hi Hans
>>>
>>> Please poke if patches fall through the cracks.
>>>
>>> On 20 March 2017 at 11:05, Hans de Goede <hdegoede at redhat.com> wrote:
>>>> Together with some fixes to xdriinfo this fixes xdriinfo not working
>>>> with glvnd.
>>>>
>>>> Since apps (xdriinfo) expect GetDriverConfig to work without going to
>>>> need through the dance to setup a glxcontext (which is a reasonable
>>>> expectation IMHO), the dispatch for this ends up significantly different
>>>> then any other dispatch function.
>>>>
>>>> This patch gets the job done, but I'm not really happy with how this
>>>> patch turned out, suggestions for a better fix are welcome.
>>>>
>>>> Cc: Kyle Brenneman <kbrenneman at nvidia.com>
>>>> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
>>>> ---
>>>>   src/glx/g_glxglvnddispatchfuncs.c   | 18 ++++++++++++++++++
>>>>   src/glx/g_glxglvnddispatchindices.h |  1 +
>>>>   2 files changed, 19 insertions(+)
>>>>
>>>> diff --git a/src/glx/g_glxglvnddispatchfuncs.c
>>>> b/src/glx/g_glxglvnddispatchfuncs.c
>>>> index b5e3398..040cdf8 100644
>>>> --- a/src/glx/g_glxglvnddispatchfuncs.c
>>>> +++ b/src/glx/g_glxglvnddispatchfuncs.c
>>>> @@ -4,6 +4,7 @@
>>>>    */
>>>>   #include <stdlib.h>
>>>>
>>>> +#include "glxclient.h"
>>>>   #include "glxglvnd.h"
>>>>   #include "glxglvnddispatchfuncs.h"
>>>>   #include "g_glxglvnddispatchindices.h"
>>>> @@ -50,6 +51,7 @@ const char * const
>>>> __glXDispatchTableStrings[DI_LAST_INDEX] = {
>>>>       __ATTRIB(GetCurrentDisplayEXT),
>>>>       // glXGetCurrentDrawable implemented by libglvnd
>>>>       // glXGetCurrentReadDrawable implemented by libglvnd
>>>> +    __ATTRIB(GetDriverConfig),
>>>
>>> Back in Nov 2016 we had a chat with Adam and if I understood things
>>> correctly the idea was to kill off the following:
>>>
>>> glXGetScreenDriver
>>> glXGetDriverConfig
>>>
>>> Neither of those is part of an extension and the only user xdriinfo,
>>> is not that useful.
>>> Would be great if distributions let it to rest and we don't have to
>>> worry about it ever being around ;-)
>>
>> The problem is that driconf uses them and people actually use driconf,
>> see: https://bugzilla.redhat.com/show_bug.cgi?id=1429894
>>
> Ouch, had not idea people are still using that behemoth :-(
> In that case we cannot nuke the API, so let's merge this patch.
>
> Small nit: please drop the compilation guard. Those should be always
> true when compiling the file.
>
> Kyle/others - the GLVND bits are in, aren't they? Do you have any
> comments on the patch?
>
> With that the nit
> Reviewed-by: Emil Velikov <emil.velikov at collabora.com>
> Cc: mesa-stable at lists.freedesktop.org
>
> Thanks
> Emil
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The patch assumes that glXGetDriverConfig will only ever be implemented 
by Mesa. As long as that's a safe assumption, the change looks right to me.