Canvas drawImage rendering transparency incorrectly with hardware acceleration
Reported by
chrisfro...@gmail.com,
Mar 21 2018
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Issue descriptionUserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 Edge/16.16299 Steps to reproduce the problem: 1. https://jsfiddle.net/chrisfromneptune/hv660ou3/2/ 2. View 2nd image and notice the edging of the upper and left side does not match that of the 1st image without using Canvas. What is the expected behavior? The two images to render identically. What went wrong? Turning off hardware acceleration resolves it, however it needs to work with the default settings of the browser. Did this work before? No Does this work in other browsers? Yes Chrome version: 67.0.3371.0 Channel: beta OS Version: 10.0 Flash Version:
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Mar 23 2018
chrisfromaussie@ Thanks for the issue. Tested this issue on Windows 10 and Mac OS 10.12.6 on the reported version 67.0.3371.0 and Canary 67.0.3379.0 by following the steps mentioned above. Launched the above fiddle and could observe no difference between the two images with Hardware Acceleration Enabled and Disabled. The same behavior is observed on Firefox as well. Attached is the screen cast for reference. Request you to check and confirm if anything is missed from our end in triaging the issue. Request you to retry the issue on a new chrome profile without any flags/extensions and update the thread with observations. Thanks..
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Mar 23 2018
Thank you for your testing. I can reproduce it on 2 out of 3 of my machines, all running Windows 10. I've attached a screenshot of the reproduction. I've tested on a brand new install of the dev channel without any modifications to flags or settings. I've made sure my graphics driver is the latest (Intel HD Graphics 630 and the other is Intel HD Graphics 530). I have no other rendering problem in daily use of Chrome so this is a weird issue, only happening in Chrome.
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Mar 23 2018
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
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Apr 19 2018
Unable to reproduce the issue on chrome reported version 67.0.3371.0 and on latest chrome 68.0.3398.0 using windows-10 with steps mentioned below: 1) Launched chrome reported version and navigated to URL: https://jsfiddle.net/chrisfromneptune/hv660ou3/2/ 2) Seen the two images rendering identically on enabling and disabling hardware acceleration @Reporter: Please find the attached screencast for your reference and let us know if we missed anything in verifying the issue, provide your feedback on it which help in triaging it in better way. Thanks!
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May 31 2018
As there is no response from the reporter from so long, closing this issue as Won't fix. @Reporter: Please feel to raise a new issue if issue is still seen. Thanks! |
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Comment 1 by susan.boorgula@chromium.org
, Mar 21 2018