glBlendColor in IRIX 6.4

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Steve Baker (sbaker++at++link.com)
Fri, 19 Jun 1998 15:51:23 -0500 (CDT)

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I'm writing some OpenGL on various flavors of machine and
decided to move some GL code into my Performer application.

I have to be aware of the fact that most SGI boxes only
run OpenGL 1.0.

So, I wrote:

#ifdef GL_VERSION_1_2 /* Wishful thinking */
    glBlendColor ( red, green, blue, alpha ) ;
#else
#ifdef GL_VERSION_1_1
    glBlendColor ( red, green, blue, alpha ) ;
#else
#ifdef GL_EXT_blend_color
    glBlendColorEXT ( red, green, blue, alpha ) ;
#else
  fprintf ( stderr, " glBlendColor isn't supported on this OpenGL!\n" ) ;
#endif
#endif
#endif

....but on ONYX-2 IRIX 6.4, the token GL_VERSION_1_1 is defined
and yet there is no definition for glBlendColor() in the
gl.h header file.

I think this is a bug - I can't think of a more 'correct' way
to write this code.

The same thing happens with glBlendEquation.

Steve Baker (817)619-8776 (Vox/Vox-Mail)
Raytheon Systems Inc. (817)619-4028 (Fax)
Work: SBaker++at++link.com http://www.hti.com
Home: SJBaker1++at++airmail.net http://web2.airmail.net/sjbaker1

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