[Mesa-dev] [Bug 78716] Fix Mesa bugs for running Unreal Engine 4.1 Cave effects demo compiled for Linux

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78716

--- Comment #11 from Kenneth Graunke <kenneth at whitecape.org> ---
(In reply to comment #10)
> Created attachment 102771 [details] [review]
> patch that adds 4.0 missing blend functions api
> 
> attached patch makes some of these new demos work for me on Intel Haswell
> machine

Ah, that problem :)  Tapani, would you mind sending that patch to the mailing
list and Cc'ing Ian?

We support ARB_draw_buffers_blend, which introduces these functions but with an
ARB suffix.  But, if you read ARB_blend_func_extended, it talks abbout removing
references to BlendFunci (not BlendFunciARB!) if you don't support
ARB_draw_buffers_blend...which makes it sound like ARB_draw_buffers_blend
should have introduced them.

https://www.opengl.org/registry/specs/ARB/draw_buffers_blend.txt
https://www.opengl.org/registry/specs/ARB/blend_func_extended.txt

Since it's just accepting the core names in addition to the ARB names, which
we're going to do eventually anyway, I'm in favor of taking your patch.  I've
seen a few of Intel's GL tests hit this bug as well.

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