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Issue 803029 link

Starred by 2 users
Status: WontFix
Owner: ----
Closed: Oct 4
Cc:
wjmaclean@chromium.org
rob@robwu.nl
nyerramilli@chromium.org
rbasuvula@chromium.org
mcnee@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Windows
Pri: 2
Type: Bug-Regression



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Regression:Black patch appears momentarily after zooming out/in and scrolling the pdf page.

Reported by vku...@etouch.net, Jan 17 2018 
Chrome Version:65.0.3323.0 (Official Build)Revision 470d3a6be2f380affa8de3dc0dd1508f3eeba9f7-refs/heads/master@{#529554} (32/64-bit)
OS:Windows(7,8,8.1,10)
URL:https://chrome.google.com/webstore/detail/pdf-viewer/oemmndcbldboiebfnladdacbdfmadadm?hl=en

What steps will reproduce the problem?
(1)Launch chrome,navigate to above url and click on 'ADD TO CHROME'.
(2)Navigate to http://www.stepupnihongo.com/images/SUN3_L-51.pdf , click on zoom out/zoom in button (i.e - or +)
(3)Scroll pdf page up/down and observe the content.

Actual: Black patch appears momentarily after zooming out/in and scrolling the pdf page.

Expected: No such black patch should be seen after zooming out/in and scrolling the pdf page.

This is a regression issue broken in 'M65' and below is the manual bisect info
Good Build: 65.0.3294.0 (Revision:523977)
Bad Build:  65.0.3295.0 (Revision:524284)

Note: Issue not seen on Mac(10.12.6, 10.13.1, 10.13.3),Linux(14.04 LTS)OS.
Actual_Pdf.mp4
1.5 MB View Download
Expected_Pdf.mp4
1.7 MB View Download

Comment 1 by vku...@etouch.net, Jan 17 2018

Labels: hasbisect
Owner: dsinclair@chromium.org
Status: Assigned (was: Unconfirmed)
Narrow bisect info
https://chromium.googlesource.com/chromium/src/+log/95ba5b0d44f5f87fffef655da958022b70ac0001..e486ef03b1649a5749cd875b03898b2b1600c055?pretty=fuller&n=30
(Unable to provide bisect using per-revision script as all the chrome build appears crashy after launch)

From above CL 
Suspecting pdfium-deps-roller: https://pdfium.googlesource.com/pdfium.git/+log/fe9d640ea90c..df4f30eaaa46?pretty=fuller&n=30

@dsinclair: Could you please look into the issue, pardon me if it has nothing to do with your changes and if possible please assign it to concern owner.

Comment 2 by nyerramilli@chromium.org, Jan 17 2018

Labels: RegressedIn-65 Target-65 FoundIn-65

Comment 3 by dsinclair@chromium.org, Jan 17 2018

Cc: wjmaclean@chromium.org mcnee@chromium.org
Owner: danakj@chromium.org
danakj@ could this be related to https://chromium-review.googlesource.com/c/chromium/src/+/826182 ? If not, please feel free to assign back.

Comment 4 by danakj@chromium.org, Jan 17 2018

Owner: dsinclair@chromium.org
Sorry no, that CL is Android WebView specific.

Comment 5 by thestig@chromium.org, Jan 18 2018

Cc: junov@chromium.org
Components: -Internals>Plugins>PDF Platform>Extensions
Isn't this Rob W's PDF Viewer, and thus not related to Internals>Plugins>PDF? Also, the pdfium-deps-roller CL is all XFA, which does not affect Chromium at all right now.

junov: Could this be caused by r524204?

Comment 6 by nyerramilli@chromium.org, Feb 2 2018

Labels: ET-MUM-Reported

Comment 7 by junov@chromium.org, Jul 25

Cc: -junov@chromium.org

Comment 8 by dsinclair@chromium.org, Sep 4

Owner: ----
Status: Untriaged (was: Assigned)
Setting PDF bugs assigned to me back to untriaged so they can get re-assigned as needed.

Comment 9 by karandeepb@chromium.org, Sep 7

Cc: rob@robwu.nl
cc'ing Rob, the extension owner. This might just be an issue with the extension.

Comment 10 by rob@robwu.nl, Sep 7

Components: -Platform>Extensions Blink>Canvas
This is more likely a bug with canvas/rendering. My PDF Viewer extension makes heavy use of <canvas>. In the given PDF file, large bitmaps are being drawn on the canvases.

From the regression range and the description of 2e4a432454ac3f04d6c5fa8f17c49ce3026217d6, it seems quite likely that the regression is caused by it.

Comment 11 by schenney@chromium.org, Sep 10

Labels: -Pri-1 Pri-2
This broke way back now. Not a P1.

Comment 12 by fs...@chromium.org, Oct 4

Status: WontFix (was: Untriaged)
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