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Issue 664964 link

Starred by 1 user
Status: Duplicate
Merged: issue pdfium:523
Owner:
brucedaw...@chromium.org
Closed: Nov 2016
Cc:
nyerramilli@chromium.org
█ msrchandra@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows , Mac
Pri: 1
Type: Bug-Regression



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Regression:Flickering of preview content is seen after tick/untick checkbox of 'background graphics' options.

Reported by jshan...@etouch.net, Nov 14 2016 
Chrome Version:56.0.2918.0 6015da67bcb535f343caf0f5cff5867d7f4487d8-refs/heads/master@{#431795} (32/64-bit)  
OS:Windows(7,8,10)

What steps will reproduce the problem?
(1)Launch chrome and navigate to http://www.adobe.com/products/shockwaveplayer.html
(2)Press ctrl+p ,click on 'more settings' option and click on 'fit to page' button.
(3)Click on 'Zoom in' button such that horizontal scroll bar appears , scroll to extreme right side.
(4)Now tick/untick checkbox of 'background graphics' option and observe the preview.

Actual: Flickering of preview content is seen after tick/untick checkbox of 'background graphics' options.

Expected: No such flickering should be seen of preview content after tick/untick checkbox of 'background graphics' options.

This is a regression issue broken in 'M53' and will soon update other info.

Comment 1 by jshan...@etouch.net, Nov 14 2016

Labels: hasbisect OS-Linux OS-Mac
Owner: brucedaw...@chromium.org
Status: Assigned (was: Unconfirmed)
Manual regression range:
Good Build: 53.0.2777.0 
Bad Build:  53.0.2778.0 

Narrow bisect:
https://chromium.googlesource.com/chromium/src/+log/d2fe69a5e34d8213a6a60690a895b8e9ab428e16..30535f7116c9073705a155c7cf4b0146a28f7293?pretty=fuller&n=50

Suspecting: 401660 ?
Kindly help to re-assign, if your changes are not cause for this issue.
Actual_Print.mp4
1.4 MB View Download
Expected_Print.mp4
1.0 MB View Download

Comment 2 by brucedaw...@chromium.org, Nov 14 2016

Mergedinto: pdfium:523
Status: Duplicate (was: Assigned)
Yes, that sounds like the symptoms of my change, which was, specifically:

https://codereview.chromium.org/2057143003

My change altered the timeouts so any bug that it revealed as necessarily always a latent possibility. I think that the tradeoff (hugely improved scrolling responsiveness) makes this a reasonable tradeoff.

These issues should be resolved (and scrolling performance further improved!) by working in pdfium that is covered by pdfium  bug 523 . I'm closing it as a duplicate because the  bug 523  work will resolve this issue.
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