Bug 139024 - WebGL Shader corruption with iPhone 5 on iOS 8.1.1
Summary: WebGL Shader corruption with iPhone 5 on iOS 8.1.1
Status: RESOLVED CONFIGURATION CHANGED
Alias: None
Product: WebKit
Classification: Unclassified
Component: WebGL (show other bugs)
Version: 528+ (Nightly build)
Hardware: iPhone / iPad iOS 8.1
: P2 Normal
Assignee: Nobody
URL: http://sqr.bartekdrozdz.com/html/lab/...
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2014-11-24 03:43 PST by Mark Perris
Modified: 2021-03-18 03:30 PDT (History)
3 users (show)

See Also:

Attachments
Screenshot of corruption visible on an iPhone 5. (306.42 KB, image/png)
2014-11-24 03:43 PST, Mark Perris 		no flags Details
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Description Mark Perris 2014-11-24 03:43:59 PST 
Created attachment 242155 [details]
Screenshot of corruption visible on an iPhone 5.

Running the following example on an iPhone 5 with iOS 8.1.1 causes corrupted output, per the screenshot attached.

http://sqr.bartekdrozdz.com/html/lab/gl_ssao/

The same style of corruption is also visible on certain examples on ShaderToy.
The ShaderToy examples work correctly with an iPhone 6, suggesting it could be a driver bug.
I'll test this specific example on an iPhone 6 when I head past the Apple Store tonight.
Comment 1 Mark Perris 2014-11-24 09:25:08 PST 
I can confirm in this specific example, the bug is also present on the iPhone 6, though with slightly different artefacts.
Comment 2 Dean Jackson 2014-11-24 19:13:30 PST 
Thanks!
Comment 3 Radar WebKit Bug Importer 2014-11-24 19:13:44 PST 
<rdar://problem/19076434>