https://bugs.freedesktop.org/show_bug.cgi?id=105161
--- Comment #2 from Allan Sandfeld Jensen <k...@carewolf.com> ---
Note. I have been unable to get it to work at all in compatibility-mode desktop
OpenGL. The following code only works in core mode:
#ifdef GL_KHR_blend_equation_advanced
#extension GL_KHR_blend_equation_advanced : require
layout(blend_support_all_equations) out;
#endif
because layout is not identified in basic OpenGL 2.0, and while
#ifdef GL_KHR_blend_equation_advanced
#extension GL_ARB_explicit_attrib_location : enable
#extension GL_KHR_blend_equation_advanced : require
layout(blend_support_all_equations) out;
#endif
parses, it doesn't actually change anything. Mesa still reports:
Mesa: User error: GL_INVALID_OPERATION in fragment shader does not allow
advanced blending mode (GL_MULTIPLY)
With NVidia drivers, I don't need any changes to fragment shaders.
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