regression happens when MSAA sample count change from 4 to 8 |
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Issue description
Platform: linux + Intel GPU(Broadwell)
What steps will reproduce the problem?
(1) run three cases as below,
https://webglsamples.org/aquarium/aquarium.html
http://www.catuhe.com/trash/webglperfs/perf.html
http://webglsamples.org/city/city.html
(2) regression happens
aquarium: 9% regression,
perf: ~30% regression
city:~40% regression
aquarium
Fish MSAA(sample_count=8) MSAA(sample_count=4) CMAA
6000 60 60 60
8000 49 53 53
10000 40 43 43
12000 34 36 36
14000 30 32 32
16000 26 28 28
18000 23 25 25
20000 21 23 22
perf
MSAA(sample_count=8) MSAA(sample_count=4) CMAA
29~50 56~60 60
city
MSAA(sample_count=8) MSAA(sample_count=4) CMAA
27~33 53~57 60
Try to enable CMAA instead of MSAA on Intel GPUs for all platforms.
,
Nov 2 2017
,
Nov 6 2017
There is quality reduce when using CMAA instead of MSAA. Attached files show different quality between CMAA and MSAA, especially the font "PaintSupreme 3D". So need to consider which is more important for users between FPS and anti-alias quality.
,
Nov 9 2017
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Comment 1 by kbr@chromium.org
, Nov 1 2017Status: Assigned (was: Untriaged)