1338656 - ES_texture_float extension seems to not be found on Android devices where Chrome finds it.

Status: RESOLVED INCOMPLETE

(Core :: Graphics: CanvasWebGL, defect, P3)

Description

[Thomas Wisniewski]

The given URL seems to work on some Android 6.0.1 devices in Chrome 55, but not on Firefox (stable or nightly). The reason cited by the page is that "Rendering to floating-point textures is required but not supported" in Firefox.

Note that on my own A6.0.1 Galaxy S7 Edge, both Chrome and Firefox claim that the extension isn't available, with differing messages being reported (context available in the "see also" link).

The devices we have confirmed to work in Chrome but not Firefox are a Motorola Moto E 4G and a Lenovo Moto G4 Plus.

Comment 1

[Kelsey Gilbert [:jgilbert]]

(In reply to Thomas Wisniewski from comment #0)
> The given URL seems to work on some Android 6.0.1 devices in Chrome 55, but
> not on Firefox (stable or nightly). The reason cited by the page is that
> "Rendering to floating-point textures is required but not supported" in
> Firefox.
> 
> Note that on my own A6.0.1 Galaxy S7 Edge, both Chrome and Firefox claim
> that the extension isn't available, with differing messages being reported
> (context available in the "see also" link).
> 
> The devices we have confirmed to work in Chrome but not Firefox are a
> Motorola Moto E 4G and a Lenovo Moto G4 Plus.

Please attach the Graphics section of the about:support page for the affected devices.

Comment 2

[Guillaume Démésy [:magsout]]

Attachment: about:support

about:support

Comment 3

[Kelsey Gilbert [:jgilbert]]

(In reply to Guillaume DEMESY from comment #2)
> Created attachment 8837033 [details]
> about:support
> 
> about:support

Can I get the about:support from up-to-date Nightly?

Comment 4

[Guillaume Démésy [:magsout]]

Attachment: about:support

Firefox nightly about:support

Comment 5

[Karl Dubost💡 :karlcow]

Attachment: sharp-sh-01g-webgl.txt

it requires tests on Chrome and Firefox Nightly with different Android version.
For me it's working on Chrome 
and not FirefoxNightly 59.0a1 - 20180102110817

I added the Graphics Section of about:support to the bug.

Comment 6

[Brian Peiris]

Conversely, it seems that Nightly reports OES_texture_float is available on the Galaxy S6 when it is not actually available, as far as I can tell. 

The water demo[1] uses a different detection method to verify whether texture_float is supported and correctly refuses to render in Nightly on the S6, despite it reporting that OES_texture_float is available.

Khronos' test suite[2] also reflects the same. It sees that texture_float is reported as available but continues to fail in other tests since the extension is not actually usable. In Chrome, the test suite stops after the first test, since Chrome correctly reports that the S6 does not support texture_float. See the attached screenshots.

I've attached the Graphics section of about:support for my S6 as well.

[1]: http://madebyevan.com/webgl-water/
[2]: https://www.khronos.org/registry/webgl/sdk/tests/conformance/extensions/oes-texture-float.html

Comment 7

[Brian Peiris]

Attachment: galaxy-s6-about-support-graphics.txt

Comment 8

[Brian Peiris]

Attachment: nightly-khronos-test-s6.png

Comment 9

[Brian Peiris]

Attachment: chrome-khronos-test-s6.png

Comment 10

[Kelsey Gilbert [:jgilbert]]

It's an ES 3.2 context. I refuse to believe it doesn't support float textures. I'll look into this.

Comment 11

[Firefox Bug Husbandry Bot]

Migrating Webcompat whiteboard priorities to project flags. See bug 1547409.

Comment 12

[Firefox Bug Husbandry Bot]

See bug 1547409. Migrating whiteboard priority tags to program flags.

Comment 13

[Kelsey Gilbert [:jgilbert]]

This reminds me of bug 1608644.

Comment 14

[Kelsey Gilbert [:jgilbert]]

Actually this is probably bug 1604622. Can you retest on Nightly?

Comment 16

[Brian Peiris]

Sorry, I no longer own the Galaxy S6 that I tested on.