875696 - A number of devices expose OES_standard_derivatives, but have broken implementations of it

Status: RESOLVED FIXED

(Core :: Graphics: CanvasWebGL, defect)

Description

[Kelsey Gilbert [:jgilbert]]

Including at least the Nexus 4.

All we need to do is not activate this extension on these devices.

Comment 1

[Kelsey Gilbert [:jgilbert]]

Attachment: patch: Disable std-derivs on Adreno 320.

Comment 2

[Kelsey Gilbert [:jgilbert]]

https://hg.mozilla.org/integration/mozilla-inbound/rev/f78448227726

Comment 3

[Ed Morley [:emorley]]

https://hg.mozilla.org/mozilla-central/rev/f78448227726

Comment 4

[Benoit Jacob [:bjacob] (mostly away)]

By the way, have you reported this to Qualcomm?

Comment 5

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

What was broken?  Is it fixed in the driver with 4.4?  Did we report it to Qualcomm?

Comment 6

[Kelsey Gilbert [:jgilbert]]

Looks like I never mentioned what was broken. IIRC, it was dFdy always returning 0 on Adreno320. I don't believe this was reported to Qualcomm. What's the process for that?

Comment 7

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Probably no need to -- sounds like it was fixed in newer drivers anyway at this point.