Bug 252359 - iOS Safari incorrectly reports supporting OES_texture_float_linear
Summary: iOS Safari incorrectly reports supporting OES_texture_float_linear
Status: RESOLVED FIXED
Alias: None
Product: WebKit
Classification: Unclassified
Component: WebGL (show other bugs)
Version: WebKit Nightly Build
Hardware: iPhone / iPad iOS 16
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
: 264404 (view as bug list)
Depends on: 254064
Blocks:
  Show dependency tree / graph
 
Reported: 2023-02-15 15:44 PST by Gregg Tavares
Modified: 2023-11-09 01:26 PST (History)
5 users (show)

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Description Gregg Tavares 2023-02-15 15:44:25 PST 
On my iPhone 13 Pro running iOS 16.3.1, iOS Safari incorrectly reports supporting OES_texture_float_linear

see https://webgplreport.com

notice: OES_texture_float_linear shows up as a supported extension

Then, go to: https://jsgist.org/?src=94615d573985d60b76314bd4857f6410

First try desktop: See the texture is filtered (the texture is an RGBA32 texture)

Now go the same url on iPhone, See the texture is not filtered

Note: The conformance test for oes_texture_float_linear passes on iOS but looking into the source it never actually checks if results are actually filtered.

https://registry.khronos.org/webgl/sdk/tests/conformance/extensions/oes-texture-float-linear.html?webglVersion=2&quiet=0&quick=1
Comment 1 Kimmo Kinnunen 2023-02-18 04:20:25 PST 
Thanks for the report!
Yes, I think the issue is that the iOS hardware does not support RGBA32Float filterability. We need to update the ANGLE texture format tables..
Comment 3 Radar WebKit Bug Importer 2023-02-22 15:45:18 PST 
<rdar://problem/105803356>
Comment 4 Kimmo Kinnunen 2023-11-09 01:12:22 PST 
Fixed in bug 254064
Comment 5 Kimmo Kinnunen 2023-11-09 01:26:20 PST 
*** Bug 264404 has been marked as a duplicate of this bug. ***