[Webkit-unassigned] [Bug 252359] New: iOS Safari incorrectly reports supporting OES_texture_float_linear

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=252359

            Bug ID: 252359
           Summary: iOS Safari incorrectly reports supporting
                    OES_texture_float_linear
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: iPhone / iPad
                OS: iOS 16
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: gman at chromium.org
                CC: dino at apple.com, kbr at google.com, kkinnunen at apple.com

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

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