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Images are upscaled on a combination of highDPI and standard DPI monitors
Reported by
bor...@gmail.com,
Sep 22 2017
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Issue descriptionUserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36 Example URL: Any PNG image Steps to reproduce the problem: 1. Have a Chrome open on a multi-monitor setup, e.g., Windows laptop + an external monitor, where laptop is highDPI and scaled in Windows to e.g. 150% while the other monitor is normal 100% DPI. 2. Open some page with PNG image in Chrome, move it to the external monitor (100% DPI). 3. Observe that the image is upscaled and blurry in Chrome 61, compared to the same PNG open in some desktop app like Paint.NET or other browsers like Chrome Canary (63) or Firefox 57. This started happening about three weeks ago, I've never seen it before and is probably fixed in Canary. Displaying content correctly is very important to me so maybe the fix could be backported to 61? What is the expected behavior? Non-blurry, normal size image. What went wrong? Image is upscaled by about 20% (I don't know exactly) and blurry. Does it occur on multiple sites: Yes Is it a problem with a plugin? No Did this work before? Yes 59 or 60, I'm not sure Does this work in other browsers? Yes Chrome version: 61.0.3163.100 Channel: stable OS Version: 10.0 Flash Version:
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Sep 22 2017
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Sep 22 2017
Need a bisect, if possible. But I suspect the problem is in cc image caching.
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Sep 25 2017
Unable to reproduce the issue in Win-10 high dpi laptop (150% scaling) connecting it to an external monitor(100% scaling) using chrome reported version #61.0.3163.100. Following are the steps followed to reproduce the issue. ------------ 1. Opened chrome in a multi-monitor setup, e.g., Windows laptop + an external monitor, where laptop is highDPI and scaled in Windows to e.g. 150% while the other monitor is normal 100% DPI. 2. Opened a page with PNG image in Chrome and moved it to the external monitor (100% DPI). 3. Observed that the image was non-blurry and of normal size image. Attaching screen cast for reference. borekb@ - Could you please verify the screen cast and please let us know if anything missed from our side. Also if possible please provide a sample page with png image where the issue was seen. Thanks...!!
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Sep 25 2017
@krajshree your steps seem to be correct but I'm not sure about the monitor setup, for example, you cannot set screen resolution and the second monitor doesn't have the option to extend the desktop there. Is that some virtualized setup or physical monitors? I've put together (hopefully) all the info about my setup and sample images in this Google doc: https://docs.google.com/document/d/1ydsov_WQiNdcTVeCsLMlOQi5R8EdyHx-o52ADESd0TY/edit?usp=sharing Let me know if I can provide more.
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Sep 25 2017
Thank you for providing more feedback. Adding requester "krajshree@chromium.org" to the cc list and removing "Needs-Feedback" label. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Sep 26 2017
@MTVTeam-- Could someone from MTV team look into this , as the external monitor resolution settings provided in comment #5 , 2560*1440 monitor is not avilable with the Inhouse team. Thanks!
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Sep 26 2017
A colleague of mine reproduced as well on a MacBook Pro (~2015) and an external FullHD monitor.
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Oct 2 2017
Adding NextAction to follow up with test team. Also adding Mac contact in the event they have the right setup to reproduce.
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Oct 16 2017
The NextAction date has arrived: 2017-10-16
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Oct 17 2017
Removing from the bisect queue since we are not able to repro.
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Oct 18 2017
I've upgraded to Windows 10 Fall Creators Update (1709) today, the issue still exists: https://snag.gy/e98yGI.jpg This is a screenshot from my external monitor which runs at 100% DPI.
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Oct 18 2017
Oh no, I just found out that I had "Page zoom" set to 110% in my Settings for some reason. Sorry guys! This can be closed.
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Oct 18 2017
No problem! Thanks for the report. |
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Comment 1 by dtapu...@chromium.org
, Sep 22 2017