-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 07/11/2011 12:08 PM, Eric Anholt wrote: > On Sat, 9 Jul 2011 09:01:07 -0700, Chad Versace <c...@chad-versace.us> wrote: >> If the height of the stencil buffer were odd, then we allocated a region >> whose height was too small --- `height / 2` rather than >> `height / 2 + height % 2`. > > Generally this is written "(height + 1) / 2" or "ALIGN(height, 2) / 2".
Ok. I'll change the patch to use the (height+1)/2 idiom. > So, did the math end up working out so that Y tiling the W buffer was > easier? The math for decoding a W tile through a Y fence was slightly more complex than decoding an unfenced W tile. As far as arithmetic complexity is concerned, it doesn't matter which one we choose. More importantly, I was absolutely unable to get the stencil buffer to work as non-tiled. I encountered bizarre behavior. However, if you really think that we should allocate the stencil buffer as non-tiled, then we can discuss on Wednesday possible interpretations of that bizarre behavior and the needed fixes. - -- Chad Versace c...@chad-versace.us -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBAgAGBQJOG3dbAAoJEAIvNt057x8iMugQAKbQcu7tg0wYGrbGB9DhhW4Y zIQueR+d8dcEXB/C5hN2PdxHLAkVQrkUz7PXxPmbOn9nDH69CtBdTJhIpEJtiOH7 RtYgsfiIwqEu7YHs6y4+GgmwnmIokiIJMSOtLgx8hZgvO0wdxqITHcE+qZubDQQz lMpxjKu7pM+B2sb3FooRCYO/EzzFaj4Iz27Eav3aQM7GceSp7aOtlMTUGrIs0a2q XtIEOF7m04JtfVeLnkiqkLVIIfVFeSPP0FAXkgnJcmESIkWOUQ2fEOiWj4b4EgIe iRDRJOLYuf20s8eT2WLK/Zck7JJajy6VKl+OemwJtzbTzZlhWD24dR/Tu5TReL9X n/YSCyO+hzTEwcIgNaiIH5oY8dABEs702lT0xZlUicIlJFsrr2Bri3mj5B/OSdOG hN+Vy2DF6+DuYbz8SkURMdHdbxVEtGJXXgX2m9RgJ8u64s24HywSRKDkLU/M2i0k DWkScczFyr61BaPOWQjcbcL0hbstzpELGAzAZrTR2r2VLgMDmqmovd7TpnVrgZAw kklB/nuM5wO8Mehs0ZOag6AALtclJJx0llUc2QZ3bWwWWJKpTgDBSLnTsL5vb86b hEIa1qnEOlupCj9h1r0JHqzyOsS7J+PRf+dwlQn3gmb4hdUTVBBYkBCTaDvjmkoc 8LWR5N/RmsCh8OCbdLAd =V3ci -----END PGP SIGNATURE----- _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
