[Bug 58185] New: xf86-video-intel: Green lines at bottom/right when using XV to render only part of a image

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=58185

          Priority: medium
            Bug ID: 58185
          Assignee: chris at chris-wilson.co.uk
           Summary: xf86-video-intel: Green lines at bottom/right when
                    using XV to render only part of a image
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: slomo at circular-chaos.org
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

https://bugzilla.gnome.org/show_bug.cgi?id=685305

Since GStreamer 1.0 we sometimes allocate a larger XV image for the video with
padding on all four sides but then call Xv(Shm)PutImage() to render a part of
this image. With intel drivers this (depending on resolutions) sometimes causes
a 1-2 pixel wide green line at the right side or bottom.

The resolutions in question or usually perfect multiples of 16, e.g. 672x416 is
allocated and 640x360 (16 pixel padding at left/right/top, 40 pixel padding at
bottom) is rendered.

When allocating and rendering 672x416 or 640x360 directly (i.e. no offsets or
anything) there are no green lines anywhere.

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