[webkit-changes] [WebKit/WebKit] e05b9c: [ANGLE] Support BGRA_SRBGB_ANGLE for framebuffer b...

[Dan Glastonbury]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: e05b9c978c96e378382231758e0f708cb93ea1de
      https://github.com/WebKit/WebKit/commit/e05b9c978c96e378382231758e0f708cb93ea1de
  Author: Dan Glastonbury <djg at apple.com>
  Date:   2023-06-15 (Thu, 15 Jun 2023)

  Changed paths:
    M Source/ThirdParty/ANGLE/changes.diff
    M Source/ThirdParty/ANGLE/src/libANGLE/formatutils.cpp

  Log Message:
  -----------
  [ANGLE] Support BGRA_SRBGB_ANGLE for framebuffer blits
https://bugs.webkit.org/show_bug.cgi?id=258104
rdar://110811770

Reviewed by Dean Jackson.

For WebGL content, WebKit needs to perform MSAA resolve on the WebGL
buffer before compositing via a blit. On Apple platforms, this draw
buffer is usually in BGRA8_SRGB_ANGLEX as it is the native format for
the windowing system's compositor, so SRGB8_ALPHA8 needs coercion for
WebGL to work with multisample sRGB content.

This is a cherry-pick of ANGLE issue
8208 (https://bugs.chromium.org/p/angleproject/issues/detail?id=8208)

* Source/ThirdParty/ANGLE/src/libANGLE/formatutils.cpp:
(gl::EquivalentBlitInternalFormat):

Canonical link: https://commits.webkit.org/265219@main