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Issue 787321 link

Starred by 1 user

Issue metadata

Status: WontFix
Owner:
Closed: Nov 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 2
Type: Bug



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Different render of SVG images depend of ON/OFF hardware acceleration toggle

Reported by vodianit...@gmail.com, Nov 21 2017

Issue description

UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.94 Safari/537.36

Steps to reproduce the problem:
I noticed the problem only on AMD CPU

1. Open attached file default-image.svg with "hardware acceleration toggle" ON
2. Turn OFF "hardware acceleration toggle" open default-image.svg again.
3. Compare 2 variants of pictures

What is the expected behavior?
Pictures looks same

What went wrong?
When "hardware acceleration toggle" ON, picture looks pixelated, ugly. You can see it on the attached screenshot.

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 62.0.3202.94  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 27.0 r0

I've attached chrome://gpu
 
acceleration_on.jpg
5.0 KB View Download
acceleration_off.jpg
5.5 KB View Download
default-image.svg
25.7 KB Download
gpu.html
105 KB View Download

Comment 1 by f...@opera.com, Nov 21 2017

Components: -Blink>SVG Internals>GPU>Rasterization

Comment 2 by ericrk@chromium.org, Nov 21 2017

Cc: ericrk@chromium.org
Owner: senorblanco@chromium.org
Status: Assigned (was: Unconfirmed)
Seems like GPU raster is resulting in less smooth AA of these elements on the user's computer. It's AMD discrete GPU only, so I'd expect we'd use MSAA?

senorblanco@, can you take a look?
I think this is working as intended, at least by us. I tried it on my desktop 7800HD at it looks much the same. MSAA quality on AMD devices is just not as good as NVidia's. The only other option I can see would be blacklisting AMD MSAA, but that would be a big performance loss in some cases.
Status: WontFix (was: Assigned)
Marking WontFix based on analysis in Comment #3.

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