On 11/19/2015 12:30 PM, Ilia Mirkin wrote: > On Thu, Nov 19, 2015 at 3:25 PM, Brian Paul <bri...@vmware.com> wrote: >> On 11/19/2015 01:19 PM, Ilia Mirkin wrote: >>> On Thu, Nov 19, 2015 at 3:13 PM, Brian Paul <bri...@vmware.com> wrote: >>>> >>>> Hi Nanley, >>>> >>>> Maybe you can fix an issue I have with the new extension code. >>>> >>>> Previously, I could do something like export >>>> MESA_EXTENSION_OVERRIDE="-ARB_clear_buffer_object" and I would no longer >>>> see >>>> it in the GL_EXTENSIONS string, even if it was an "always on" extension. >>> >>> How sure are you that this worked? >> >> I'm pretty sure it worked that way when I first wrote it. >> >>> AFAIK there was no way to >>> enable/disable an always-on ext. >> >> That's not the point. The point is to change what >> glGetString(GL_EXTENSIONS) (or the glGetStringi() method) returns to the >> application. I don't care if the underlying functionality is still working >> in Mesa. We're trying to tell the application to not use a feature. I've >> found this extremely helpful when debugging some apps. >> >>> That env var never affected the >>> extension strings, but only the actual ctx->Extensions struct, which >>> would indirectly modify the ext string. If the entry in that ext table >>> was a dummy one, it had logic to not futz with it. (But it did so >>> silently.) >> >> Yeah, I don't care about the table. I only care about the return value of >> glGetString(GL_EXTENSIONS). > > I was pretty annoyed at that too -- having it affect exts returned by > the driver seemed to be the important bit, but I think I investigated > why it didn't work ~6 months ago, and came to the above conclusion > [that it only futzed with the table]. In fact recently someone was > unable to work around an ARB_dsa shortcoming in nouveau by disabling > it with an override.
Ugh... How much should this work? Extensions are used to determine GL versions, and compute_version can't check that "always on" extensions have been disabled. If you try to disable GL_EXT_texture, you'll still get at least OpenGL 1.1. :) Is it okay that the version override is still needed to disable newer versions? > IMHO it makes sense for it to affect both the table and the ext > string... i.e. if there's a ctx->Extensions.foo listed, it should turn > that on/off, but if there isn't, it should still touch up the returned > ext list. > > -ilia > _______________________________________________ > mesa-dev mailing list > mesa-dev@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/mesa-dev _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
