WebKit Bugzilla
New
Browse
Search+
Log In
×
Sign in with GitHub
or
Remember my login
Create Account
·
Forgot Password
Forgotten password account recovery
RESOLVED CONFIGURATION CHANGED
258672
Regression (iOS 17.0 beta 2): Canvas Layering of Images Renders Differently
https://bugs.webkit.org/show_bug.cgi?id=258672
Summary
Regression (iOS 17.0 beta 2): Canvas Layering of Images Renders Differently
M
Reported
2023-06-29 06:24:54 PDT
Created
attachment 466866
[details]
Image showing comparison of the two renderings (prior Safari vs 17.0 Beta 2) Overview: I was testing the new iPadOS 17.0 Beta 2 (21A5268h) and noticed a bug in how Canvas rendered layered images. I hadn't noticed this issue in 17 Beta 1 (or any prior version of Safari/WebKit), so I believe it was introduced in Beta 2. The bug can be seen at this URL using an iPad on 17.0 Beta 2:
https://webkit-canvas-test.pages.dev
Steps To Reproduce: The code at the link above loads a photo of a man (man.jpeg) to the canvas and then loads another image (noise.png) on top of that. The second image is of a subtle noise pattern that should render across the canvas. Actual Results: On iPadOS 17 Beta 2, the canvas renders a man covered in an INTENSE noise pattern. It is almost as if globalCompositeOperation is something other than the default. What You Should See: All prior versions of Safari/Webkit will just show a man holding a frying pan with a subtle amount of noise on the image (see attached). The latest Safari Technology Preview release 173 on my MacBook Pro renders this correctly as well. I do not have an iPhone to test on this release yet though, so the bug may be on both iOS and iPadOS. Build: Issues seen on iPadOS 17.0 (21A5268h) on an iPad Mini 6th Generation
Attachments
Image showing comparison of the two renderings (prior Safari vs 17.0 Beta 2)
(737.18 KB, image/png)
2023-06-29 06:24 PDT
,
M
no flags
Details
View All
Add attachment
proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1
2023-06-29 10:28:56 PDT
<
rdar://problem/111520394
>
Cameron McCormack (:heycam)
Comment 2
2023-07-12 19:57:50 PDT
This should be fixed in the iPadOS public beta released today. Please let me know if you are still seeing this issue, thanks!
M
Comment 3
2023-07-13 02:52:28 PDT
(In reply to Cameron McCormack (:heycam) from
comment #2
)
> This should be fixed in the iPadOS public beta released today. Please let > me know if you are still seeing this issue, thanks!
Thank you Cameron. I can confirm that this was fixed and I am no longer seeing the issue. Great work!
Note
You need to
log in
before you can comment on or make changes to this bug.
Top of Page
Format For Printing
XML
Clone This Bug