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authorMarius Predut <[email protected]>2015-04-23 18:41:29 +0300
committerMatt Turner <[email protected]>2015-05-05 11:56:20 -0700
commit24ecf37ac070bd3c49b8e1146abe47ab24134191 (patch)
treea11926df352288871e77b35972bfc24dbbf6c5e7 /src/mapi
parentd376c3549b2d9c764d92e2c1e46b20e9c04223a4 (diff)
i965/aa: fixing anti-aliasing bug for thinnest width lines - GEN7
On SNB and IVB hw, for 1 pixel line thickness or less, the general anti-aliasing algorithm give up - garbage line is generated. Setting a Line Width of 0.0 specifies the rasterization of the “thinnest” (one-pixel-wide), non-antialiased lines. Lines rendered with zero Line Width are rasterized using Grid Intersection Quantization rules as specified by bspec section 6.3.12.1 Zero-Width (Cosmetic) Line Rasterization. v2: Daniel Stone: Fix = used instead of == in an if-statement. v3: Ian Romanick: Use "._Enabled" flag insteed ".Enabled". Add code comments. re-word wrap the commit message. Add a complete bugzillia list. Improve the hardcoded values to produce better results. v4: Matt Turner: typo fixes and adjust <= 1.49 to become < 1.5 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=28832 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=9951 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=27007 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=60797 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=15006 Acked-by: Chris Forbes <[email protected]> Acked-by: Kenneth Graunke <[email protected]> Signed-off-by: Marius Predut <[email protected]>
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