[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


danceoffwithyourpantsoff <danceoffwithyourpantsoff at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |danceoffwithyourpantsoff at gm
                   |                            |ail.com,
                   |                            |simon.fraser at apple.com




--- Comment #1 from danceoffwithyourpantsoff <danceoffwithyourpantsoff at gmail.com>  2010-10-20 02:31:09 PST ---
(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

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