Bug 212170

Summary:

OES_texture_half_float_linear unavailable on WebGL 1.0 on iOS with ANGLE

Product:

WebKit

Reporter:

Kenneth Russell <kbr>

Component:

WebGL

Assignee:

Kenneth Russell <kbr>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

dino, ews-watchlist, graouts, jdarpinian, justin_fan, kondapallykalyan, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

WebKit Nightly Build

Hardware:

Unspecified

OS:

Unspecified

Bug Depends on:

210524, 212005

Bug Blocks:

126404, 212228

Attachments:

Description	Flags
Patch	none
Patch	dino: review+, kbr: commit-queue+

Description Kenneth Russell 2020-05-20 15:08:58 PDT

The WebGL extension OES_texture_half_float_linear is unavailable on iOS (tested locally on the simulator) with WebKit's ANGLE backend for WebGL.

ANGLE isn't advertising this extension to OpenGL ES 2.0 contexts when it's using an OpenGL ES 3.0 context under the hood.

Once Bug 210524 is addressed and OES_texture_half_float is properly exposed, this must be fixed as well to avoid regressions.

Comment 1 Kenneth Russell 2020-05-20 17:09:31 PDT

Created attachment 399915 [details]
Patch

Comment 2 Kenneth Russell 2020-05-20 17:11:29 PDT

Attached is the needed patch to ANGLE. Not ready for review or EWS testing yet; it depends on the patch for Bug 210524 landing.

Have tested this minimally on the iOS Simulator; it makes the oes-texture-half-float-linear.html test pass, and the extension is actually enabled.

Comment 3 Kenneth Russell 2020-05-20 17:28:44 PDT

Created attachment 399918 [details]
Patch

Comment 4 EWS Watchlist 2020-05-20 17:29:32 PDT

Note that there are important steps to take when updating ANGLE. See http://trac.webkit.org/wiki/UpdatingANGLE

Comment 5 Dean Jackson 2020-05-20 17:35:29 PDT

Committed r261976: <https://trac.webkit.org/changeset/261976>

Comment 6 Radar WebKit Bug Importer 2020-05-20 17:36:15 PDT

<rdar://problem/63471341>