Bug 176956 - CSS background gradient and text shadows draw strange after selecting text, closing app, and reopening
Summary: CSS background gradient and text shadows draw strange after selecting text, c...
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Layout and Rendering (show other bugs)
Version: Safari 10
Hardware: All iOS 11
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2017-09-14 13:59 PDT by Tom Hamming
Modified: 2022-02-09 10:14 PST (History)
4 users (show)

See Also:

Attachments
Expected appearance (882.46 KB, image/png)
2017-09-14 13:59 PDT, Tom Hamming 		no flags Details
Broken appearance (828.45 KB, image/png)
2017-09-14 14:00 PDT, Tom Hamming 		no flags Details
Sample Xcode project (45.66 KB, application/zip)
2017-09-14 14:00 PDT, Tom Hamming 		no flags Details
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Tom Hamming 2017-09-14 13:59:47 PDT 
Created attachment 320817 [details]
Expected appearance

When text shadows and background gradients are applied to a span in a UIWebView in an iOS app, if the app is closed, another app is opened and closed, and the original app is opened again, the gradients often draw with a black background. See screenshots and attached example project.

Steps:

-Run sample project on an iOS device
-Quit the app (press the home button, not force-quit or Xcode stop), open and close at least one other app, and reopen the sample app

Observed: backgrounds (applied here to create a highlight effect in book text) draw black.
Comment 1 Tom Hamming 2017-09-14 14:00:09 PDT 
Created attachment 320818 [details]
Broken appearance
Comment 2 Tom Hamming 2017-09-14 14:00:24 PDT 
Created attachment 320819 [details]
Sample Xcode project
Comment 3 Tom Hamming 2017-09-14 14:00:54 PDT 
This is also filed as Apple radar 33436719.
Comment 4 Tom Hamming 2017-09-14 14:01:29 PDT 
(iOS 11)
Comment 5 Simon Fraser (smfr) 2017-09-14 14:16:51 PDT 
rdar://problem/33436719