[Mesa-dev] [PATCH 01/29] mesa: Add an implementation of a master convert function.

Iago Toral itoral at igalia.com
Fri Nov 21 00:47:47 PST 2014

On Fri, 2014-11-21 at 17:40 +0900, Michel Dänzer wrote:
> On 21.11.2014 17:07, Iago Toral wrote:
> > On Thu, 2014-11-20 at 11:10 -0800, Jason Ekstrand wrote:
> >> On Thu, Nov 20, 2014 at 1:48 AM, Iago Toral <itoral at igalia.com> wrote:
> >>          Just out of curiosity: is there any gain in avoiding the GL
> >>          types in the
> >>          conversion code?
> >>
> >>
> >> As I said in my reply to Jose on the 00/20 patch, we would like to
> >> eventually move the format conversion stuff to a common helper library
> >> that can be shared by mesa main and the gallium code.  If we are going
> >> to do that, then we don't want any GL dependencies.
> >
> > Yes, I know, I was just wondering why Mesa and Gallium would need/want
> > to avoid the GL dependencies in that helper library, since clients of
> > that library would usually be things like glTexImage or glReadPixels and
> > these deal with GL types.
> Since OpenGL is only one out of many APIs provided by state trackers on 
> top of Gallium (some of which have nothing to do with OpenGL), code 
> below the Gallium interface using GL types directly is a layering violation.

Aha, I see now. That makes sense.
Thanks for the explanation!


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