[Mesa-dev] [Bug 105161] Validation of KHR_blend_equation_advanced stricter than NVidia

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105161

--- Comment #4 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Specifically, the ext spec says,

"""
    A draw-time error will be generated in the OpenGL API if an application
    attempts to render using an advanced blending equation without having a
    matching layout qualifier specified in the active fragment shader.
"""

So pretty sure mesa is in the right here, and NVIDIA is buggy. (And as an
aside, the mesa implementation relies on the options being supplied properly,
since code is inserted conditionally into the shader. I'm guessing NVIDIA just
has a global library and doesn't care.)

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