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High DPI HIDPI text rendering isn't consistent
Reported by
ru...@starset.net,
Sep 20 2016
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Issue descriptionUserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36 Example URL: https://trello.com/b/ALJlJokP/weekly-classroom-newsletter Steps to reproduce the problem: 1. google-chrome --high-dpi-support=1 --force-device-scale-factor=1.5 2. Go to: https://trello.com/b/ALJlJokP/weekly-classroom-newsletter 3. Observe crisp rendering of the texts on the list. 4. Open up a private browsing session 5. Go to the same URL 6. Observe text What is the expected behavior? Text is rendered identically in both sessions. What went wrong? The private browsing session renders the text a little more fuzzy, please see attached screenshot (20160920160320-Selection.png). This is exacerbated by the view port getting zoomed out (not in). Does it occur on multiple sites: Yes Is it a problem with a plugin? No Did this work before? N/A Does this work in other browsers? Yes Chrome version: 53.0.2785.116 Channel: stable OS Version: Debian Sid Flash Version: In my own person Trello session the inconsistencies can be seen within the same page of my non-private browsing session, please see attached screenshot (20160920155443-Selection.png). The text in the "Inbox" column always renders a little more fuzzier than the rest of the columns, even after a few reloads of the page, scrolling, editing the column, and restarting the browser. I don't have a URL for this as login is required. I'm also seeing the same issue with the beta and dev channel releases.
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Sep 21 2016
high-dpi-support is not, as far as I can tell, a supported flag. Please confirm that it makes no difference to what you are seeing. I can't reproduce on trunk with the --force-device-scale-factor=1.5 switch on Linux. Signed-in and Incognito produce the same results. Maybe this is due to compositing layer sub-pixel position problems?
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Sep 21 2016
It's the same for me with our without --high-dpi-support=1. With scaling turned on in KDE I still get the same results without --force-device-scale-factor=1.5.
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Sep 29 2016
Thank you for providing more feedback. Adding requester "schenney@chromium.org" for another review and adding "Needs-Review" label for tracking. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Sep 29 2016
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Sep 29 2016
Still having this issue with Chrome 55.0.2873.0 dev (64-bit). If if's a more OS related rendering issue, any suggestions on how to test that theory would be appreciated. I don't see it in any other apps.
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Sep 29 2016
Assigning to fonts and Skia now. I'm really curious if anyone knows of differences in font behavior between signed-in and incognito. rubin@, some more questions ... Do you know if this problem is specific to your user profile? In other words, do other users see the same phenomenon? I'm starting to think you have some setting associated with your user profile, as that would explain why incognito looks different, and why we can't reproduce. Sorry for not thinking of that sooner.
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Sep 29 2016
schenney@, thank you for giving this some attention. When and where it happens seems to be a little random and sometimes now different between restarts of the session. Which session I use doesn't matter and I've been noticing the issue between Stable, Beta and Dev/Unstable channels. Currently on 53.0.2785.116 (64-bit) due to a crashing issue with the Beta and Dev/Unstable channels, issue 527035 (though I think someone blindly duped my stand along bug in there and what I'm seeing is a different issue). My personal session doesn't exhibit the issue but a Guest one does. Additionally I've been noticing it more often when the page is zoomed out to something like 75%. And it doesn't really matter if you use an Incognito window, it'll happen anywhere for me, randomly (or semi consistently, like that specific Inbox column in 20160920155443-Selection.png). Please see the new attached screenshot, the top left window is my personal session while the one in the bottom right is a Guest session. Both are zoomed out to 75%.
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Sep 30 2016
Likely a duplicate of issue 651580 , and that issue has repro steps. |
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Comment 1 by dtapu...@chromium.org
, Sep 21 2016