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Issue 820598 link

Starred by 3 users
Status: Fixed
Owner: ----
Closed: Apr 2018
Cc:
kylec...@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 2
Type: Bug



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Colors near black are hue-shifted and lightened

Reported by markan...@gmail.com, Mar 9 2018 
UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36

Example URL:
www.lagom.nl/lcd-test/all_tests.php

Steps to reproduce the problem:
1. Visit www.lagom.nl/lcd-test/all_tests.php
2. View "contrast" and "black level" sections

What is the expected behavior?
Each darker patch should gradually blend in with the pure black background.

What went wrong?
Patches become hue shifted and lighter than expected as they approach black.

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: 64.0.3282.186  Channel: stable
OS Version: 10.0
Flash Version: 

Colors look as expected in firefox 58.0.2. Disabling hardware acceleration "fixes" it, but not an ideal solution. On real images and video it comes across as dark tones looking washed out.
chrome-blacks.png
7.7 KB View Download
chrome-blacks2.png
46.4 KB View Download

Comment 1 by kochi@chromium.org, Mar 10 2018

Components: -Blink Internals>GPU
I don't know where / who to start looking at this.
Can GPU people further triage this?

(as the OP says "Disabling hardware acceleration fixes it")

Comment 2 by krajshree@chromium.org, Mar 11 2018

Labels: Needs-Triage-M64

Comment 3 by kylec...@chromium.org, Mar 16 2018

Labels: Needs-Feedback
markanini: Can you add two upload two more pieces of information:

1: With hardware acceleration enabled, open chrome://gpu and save the contents.
2. With hardware acceleration disable, save the same two references images so we can compare.

Comment 4 by markan...@gmail.com, Apr 4 2018 

I no longer have the same monitor. However the rendering issue persists as near black colors rendering too bright, making them appear washed out and in some cases pixelated. A real world example where this is noticable is Doom 3 screenshots.

I have found a solution in chrome://flags > Force color profile > sRGB.

I notice this fix has been suggested in the past for related issues. Let me know if can provide additional info.
Project Member

Comment 5 by sheriffbot@chromium.org, Apr 4 2018

Cc: kylec...@chromium.org
Labels: -Needs-Feedback
Thank you for providing more feedback. Adding the requester to the cc list.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Comment 6 by markan...@gmail.com, Apr 4 2018 

For clarity's sake, the "force color profile" fix negates disabling hardware acceleration.

Comment 7 by kylec...@chromium.org, Apr 6 2018

Status: Fixed (was: Unconfirmed)
Sounds like you've found a solution.
►

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