[Webkit-unassigned] [Bug 45908] Must enable GL_POINT_SPRITE in GraphicsContext3D implementations

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=45908





--- Comment #2 from Zhenyao Mo <zmo at google.com>  2010-10-20 10:25:03 PST ---
(In reply to comment #1)
> (In reply to comment #0)
> > In order to properly support the gl_PointCoord built-in variable in fragment shaders, it is necessary for the various GraphicsContext3D implementations running on desktop GL to enable the GL_POINT_SPRITE capability. This is similar to the earlier requirement to enable the GL_VERTEX_PROGRAM_POINT_SIZE capability.
> > 
> > Note that testing this in WebKit requires ANGLE issue http://code.google.com/p/angleproject/issues/detail?id=35 to be fixed and the version of ANGLE in WebKit to be updated.
> 
> This was recently fixed in ANGLE and rolled into Chromium, and gl_PointCoord is working now.
> 
> However, shaders that use gl_PointCoord still fail to compile in non-chromium WebKit / Safari.
> 
> Relevant:
> 
> http://code.google.com/p/chromium/issues/detail?id=59763
> http://code.google.com/p/angleproject/source/detail?r=448
> http://src.chromium.org/viewvc/chrome?view=rev&revision=63084

That's because they are still using an older version of ANGLE.

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