[Bug 15371] New: Draw untransformed repeating NPOT sources with tiles

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat Apr 5 14:20:13 PDT 2008


           Summary: Draw untransformed repeating NPOT sources with tiles
           Product: xorg
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: otaylor at redhat.com
         QAContact: xorg-team at lists.x.org

Created an attachment (id=15707)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=15707)
The patch

When we have a repeating source that's non-power-of-two in a
dimension, we can't turn on wrap for that dimension, but
if we aren't transforming then we can break the destination
area up into tiles, each tile contained completely within
a single copy of the source, and render the tiles one-by-one.

This turns out to make a big difference for the way that cairo
handles horizontal and vertical or gradients, which is to
render a thin strip (POT in the repeating direction, not-necessarily-POT
in the other), then tile it. Not having that as a software
fallback makes my desktop much more usable.

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