[Webkit-unassigned] [Bug 232071] Hardware PCF filtering does not work on iOS 15 when using WebGL2

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=232071

--- Comment #6 from Martin <mvaligursky at snap.com> ---
I've tested this on iPhone XR, OS 15.0.

Originally we used 32bit float depth texture:
    glFormat = gl.DEPTH_COMPONENT;
    glInternalFormat = gl.DEPTH_COMPONENT32F;
    glPixelType = gl.FLOAT;

I now tried 16 bit:
    glFormat = gl.DEPTH_COMPONENT;
    glInternalFormat = gl.DEPTH_COMPONENT16;
    glPixelType = gl.UNSIGNED_INT;

And also 24bit:
    glFormat = gl.DEPTH_COMPONENT;
    glInternalFormat = gl.DEPTH_COMPONENT24;
    glPixelType = gl.UNSIGNED_INT;

They all work as expected on MacOS, but I still get no filtering on iPhone XR.
I also tried Google Pixel 3A and all 3 versions work fine there.

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