228904 2021-08-08 11:38:50 -0700 WebGL 2.0 doesn't work on A8 devices (iPad mini 4, iPad Air 2) 2022-03-31 17:09:11 -0700 1 1 1 Unclassified WebKit WebGL WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 236021 236030 1 dino dino andersca derhold dino ews-watchlist hchhatwa johncunningham kbr kkinnunen kondapallykalyan kpiddington rahsaraf+webkit webkit-bug-importer oldest_to_newest 1782771 0 dino 2021-08-08 11:38:50 -0700 WebGL 2.0 doesn't work on A8 devices (iPad mini 4, iPad Air 2) 1782772 1 dino 2021-08-08 11:41:47 -0700 rdar://79198313 1782773 2 435150 dino 2021-08-08 11:45:46 -0700 Created attachment 435150 Patch 1782774 3 435151 dino 2021-08-08 13:04:36 -0700 Created attachment 435151 Patch 1782790 4 435151 johncunningham 2021-08-08 15:09:35 -0700 Comment on attachment 435151 Patch LGTM 1782923 5 dino 2021-08-09 11:17:42 -0700 Committed r280782 (240365@main): <https://commits.webkit.org/240365@main> 1835134 6 derhold 2022-01-28 13:45:59 -0800 Hey Dean or John, Any update on what version of iOS will include the version of WebKit that has this fix? Thanks 1835168 7 kpiddington 2022-01-28 15:42:52 -0800 I'm not sure if this fix took, I'm not seeing us switch automatically to the GL backend on older devices. That, or it was lost in a refactor. Visiting https://www.soft8soft.com/webglreport/?v=2 with Metal on ANGLE enabled claims that webGL2 is not supported, where disabling Metal on ANGLE shows support. 1835169 8 kpiddington 2022-01-28 15:45:14 -0800 Reopening, on an iPad Air 2, I'm seeing us fail to switch back to the OpenGL backend. 1835562 9 kbr 2022-01-31 09:41:40 -0800 +Kimmo Perhaps refactors for the GPU process changed the semantics in this area? platformSupportsMetal() is still present in Source/WebCore/platform/graphics/cocoa/GraphicsContextGLCocoa.mm and it's still called during context creation. 1835758 10 dino 2022-01-31 16:11:10 -0800 New radar: rdar://88300200 1835838 11 kkinnunen 2022-01-31 22:45:48 -0800 Maybe the ANGLE roll pulled in new ANGLE that defaults to Metal unless OPENGLES explicitly asked.. 1836145 12 kbr 2022-02-01 14:12:51 -0800 Possible - not sure. Note Chromium's starting to ship ANGLE's OpenGL backend on macOS in preparation for shipping the Metal backend, so it's still known to work to some degree. 1836416 13 kkinnunen 2022-02-02 05:50:13 -0800 Seems to be that iOS sandbox denies EAGL usage. 1836642 14 hchhatwa 2022-02-02 14:46:04 -0800 Hi- Does this issue impact only some devices? What all would be those devices? Also would love some insight on the fix for this. Thanks for the support! 1839403 15 hchhatwa 2022-02-09 14:11:06 -0800 Hi, I see the two bugs that this issue was dependent on are already closed. Is there a fix for this being release in next version? 1846956 16 kkinnunen 2022-03-01 02:04:23 -0800 (In reply to Harsh from comment #15) > Hi, I see the two bugs that this issue was dependent on are already closed. > Is there a fix for this being release in next version? This should fix using WebGL2 on iPad mini 4 on iOS 15.4. This should be fixed in iOS 15.4 seed 4. 1855704 17 derhold 2022-03-28 11:48:00 -0700 Hey Kimmo, Just tested this case on iPad Air 2 on iOS 15.4 and was still able to reproduce the issue. Your last comment noted that it should be fixed on mini 4 on 15.4 - does this mean that it should be fixed on Air 2 as well? 1857048 18 rahsaraf+webkit 2022-03-31 17:09:11 -0700 Following up on this as we're still seeing the issue on the iPad Air 2. Did the fix that went out in iPadOS 15.4 only affect the iPad Mini 4? 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