[Webkit-unassigned] [Bug 243591] New: WebGL Video upload to SRGB8 textures is slow

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=243591

            Bug ID: 243591
           Summary: WebGL Video upload to SRGB8 textures is  slow
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kkinnunen at apple.com
                CC: dino at apple.com, kbr at google.com, kkinnunen at apple.com
        Depends on: 222822

WebGL Video upload to SRGB8 textures is  slow

The GPU codepath uses OpenGL to render the texture. 
SRGB8 is not color-renderable in OpenGL. This should not be a real HW limitation.

ANGLE has more fast paths with glCopyTextureCHROMIUM, but
a) likely it doesn't do source color space conversions(?)
b) it doesn't have x flip
c) it's unclear if it does the SRGB8_ALPHA8 the same way as the current


Referenced Bugs:

https://bugs.webkit.org/show_bug.cgi?id=222822
[Bug 222822] WebGL2: Video upload to SRGB8_ALPHA8 does not match upload to SRGB8
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