[Webkit-unassigned] [Bug 216010] New: [WebGL2] Support EXT_color_buffer_half_float on WebGL 2.0 contexts

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=216010

            Bug ID: 216010
           Summary: [WebGL2] Support EXT_color_buffer_half_float on WebGL
                    2.0 contexts
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: iPhone / iPad
                OS: All
            Status: NEW
          Severity: Major
          Priority: P2
         Component: WebGL
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kbr at google.com
                CC: dino at apple.com, jdarpinian at chromium.org
            Blocks: 126404

Per agreement in the WebGL working group, the EXT_color_buffer_half_float extension is being revised to be supported on WebGL 2.0 contexts:
https://github.com/KhronosGroup/WebGL/pull/3146

The reason for this change is principally that iOS devices support 16-bit floating-point render targets but not 32-bit, so the WebGL 2.0 EXT_color_buffer_float extension, which covers both, can not be supported there.

Developers are noticing this functionality gap:
https://github.com/playcanvas/engine/pull/2123#issuecomment-682438222

WebKit's WebGL 2.0 implementation should be updated as soon as possible to track this change so that developers upgrading to WebGL 2.0 can continue to use floating-point render targets on iOS.


Referenced Bugs:

https://bugs.webkit.org/show_bug.cgi?id=126404
[Bug 126404] WebGL 2 support
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