> -----Original Message----- > From: mesa-dev [mailto:mesa-dev-boun...@lists.freedesktop.org] On Behalf Of > Kenneth Graunke > Sent: Thursday, June 11, 2015 3:04 AM > To: mesa-dev@lists.freedesktop.org > Subject: Re: [Mesa-dev] [PATCH v2] i965: do not round line width when > multisampling or antialiaing are enabled > > On Wednesday, June 10, 2015 09:07:32 AM Iago Toral Quiroga wrote: > > In commit fe74fee8fa721a we rounded the line width to the nearest > > integer to match the GLES3 spec requirements stated in section > > 13.4.2.1, but that seems to break a dEQP test that renders wide lines in > some multisampling scenarios. > > > > Ian noted that the Open 4.4 spec has the following similar text: > > > > "The actual width of non-antialiased lines is determined by rounding the > > supplied width to the nearest integer, then clamping it to the > > implementation-dependent maximum non-antialiased line width." > > > > and suggested that when ES removed antialiased lines, they removed > > "non-antialised" from that paragraph but probably should not have. > > > > Going by that note, this patch restricts the quantization implemented > > in fe74fee8fa721a only to regular aliased lines. This seems to keep > > the tests fixed with that commit passing while fixing the broken test. > > > > v2: > > - Drop one of the clamps (Ken, Marius) > > - Add a rule to prevent advertising line widths that when rounded go > beyond > > the limits allowed by the hardware (Ken) > > - Update comments in the code accordingly (Ian) > > - Put the code in a utility function (Ian) > > > > Fixes: > > dEQP-GLES3.functional.rasterization.fbo.rbo_multisample_max.primitives > > .lines_wide > > > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90749 > > Looks good to me. Thanks for doing this! > > Reviewed-by: Kenneth Graunke <kenn...@whitecape.org> > > By the way, I noticed that Marius' line-width < 1.5 code never got added to > gen8_sf_state.c, so a couple Piglit tests fail still. It might be nice to put > that in the helper function too. Feel like making a follow-up patch?
Yes indeed, I didn't know this bug was also for gen8. Good idea a helper function. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev