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:


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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.

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