[Blending] glBlendEquation Constants ?

[Mac_Systems]

Hello,

again i looked in the Red Book and wondered about missing something in LWJGL:

1	GL14.glBlendEquation (GLXX.GL_FUNC_ADD);

But why the heck are these Constants defined in
ARBImaging and GL_FUNC_SUBTRACT_EXT ?

I there a reason for this extension class ? (please explain )
For me it should be in GL14 defined !!

Nice Weekend & Stay Tuned,
- jens

[Matzon]

because it's part of GL_ARB_imaging ?