Bug 69576 - [Xv/Render] Bicubic scaling
Summary: [Xv/Render] Bicubic scaling
Status: NEW
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/intel (show other bugs)
Version: unspecified
Hardware: Other All
: medium enhancement
Assignee: Chris Wilson
QA Contact: Intel GFX Bugs mailing list
Depends on:
Reported: 2013-09-19 13:02 UTC by Chris Wilson
Modified: 2013-09-19 14:16 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


Note You need to log in before you can comment on or make changes to this bug.
Description Chris Wilson 2013-09-19 13:02:07 UTC
All the other cool drivers support it, and we could on gen4+ as well.
Comment 1 Daniel Vetter 2013-09-19 13:32:56 UTC
Can't we sufficiently approximate it on gen2/3 with the 4x4 tap texture filter?
Comment 2 Chris Wilson 2013-09-19 13:38:37 UTC
No, we can't issue that many texture lookups from within the fragment shader. Multi-pass accumulation buffer... Dream on.
Comment 3 Chris Wilson 2013-09-19 14:01:33 UTC
Daniel was referring to MAPFILTER_4x4_[12] and 3DSTATE_FILTER_COEFFICIENTS_4X4. Seems like it will be easiest to prototype on gen3 once again.
Comment 4 Daniel Vetter 2013-09-19 14:16:21 UTC
Gen2 DevMGM has a 4x4 filter too, but with slightly different instructions.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.