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Issue 838108 link

Starred by 6 users

Issue metadata

Status: Assigned
Owner:
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows , Mac
Pri: 2
Type: Bug



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toDataURL/toBlob produce transparent images for ImageBitmapRenderingContext

Reported by mysteryt...@gmail.com, Apr 30 2018

Issue description

UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0

Steps to reproduce the problem:
Open the attached web page.

What is the expected behavior?
It should show a 2x3 table of red-white icons.

What went wrong?
Two icons are missing: the images for (bitmaprenderer,toDataURL) and (bitmapRenderer,toBlob) are both transparent.

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version:  67.0.3396.18  Channel: beta
OS Version: 10.0
Flash Version:
 
chrome_bug3.html
1.9 KB View Download
Labels: Needs-Triage-M67
Cc: susan.boorgula@chromium.org
Labels: Triaged-ET M-68 Target-68 FoundIn-68 OS-Linux OS-Mac
Status: Untriaged (was: Unconfirmed)
Reporter@ Thanks for the issue.

Able to reproduce the issue on Mac OS 10.12.6, Windows 10 and Ubuntu 14.04 on the latest Canary 68.0.3416.0 and Stable 66.0.3359.139 by the steps mentioned in the original comment.

On loading the given html page, cannot observe the 2x3 table of red-white icons

This is a Non-Regression issue as this behavior is observed from M60 Chrome builds. 
Hence marking this as Untriaged for further updates from Dev.

Thanks..
838108-M60.PNG
45.0 KB View Download
Sorry, I may not have been clear enough here. 

The output should like chrome_bug3_firefox.png (Firefox 59.0.3); whereas it looks like chrome_bug3_chrome.png (Chrome 67.0.3396.30) -- I've circled the missing entries in green.

When the whole row is missing, as in your image, it's either because the `"bitmaprender"` context isn't supported or it lacks the `transferFromImageBitmap()` method. https://www.chromestatus.com says these features were only added in Chrome 66 so I wouldn't expect it to work before that. (FWIW chrome platform status links to https://bugs.chromium.org/p/chromium/issues/detail?id=658734 which I lack permission to read so I can't tell when it was added.)
chrome_bug3_firefox.png
16.7 KB View Download
chrome_bug3_chrome.png
12.7 KB View Download

Comment 4 by junov@chromium.org, May 7 2018

Owner: junov@chromium.org
Status: Assigned (was: Untriaged)
Owner: ----
Status: Available (was: Assigned)
Owner: davidqu@chromium.org
Status: Assigned (was: Available)

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