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GLBLENDCOLOREXT()                                            GLBLENDCOLOREXT()

NAME
       glBlendColorEXT - set the blend color

C SPECIFICATION
       void glBlendColorEXT( GLclampf red,
                             GLclampf green,
                             GLclampf blue,
                             GLclampf alpha )

PARAMETERS
       red, green, blue, alpha specify the components of GL_BLEND_COLOR_EXT

DESCRIPTION
       The GL_BLEND_COLOR_EXT may be used to calculate the source and
       destination blending factors. See glBlendFunc for a complete
       description of the blending operations.  Initially the
       GL_BLEND_COLOR_EXT is set to (0,0,0,0).

NOTES
       glBlendColorEXT is part of the EXT_blend_color extension, not part of
       the core GL command set.  If GL_EXT_blend_color is included in the
       string returned by glGetString, when called with argument
       GL_EXTENSIONS, extension EXT_blend_color is supported by the
       connection.

ERRORS
       GL_INVALID_OPERATION is generated if glBlendColorEXT is executed
       between the execution of glBegin and the corresponding execution of
       glEnd.

ASSOCIATED GETS
       glGet with an argument of GL_BLEND_COLOR_EXT.

SEE ALSO
       glBlendFunc, glGetString.

                                                             GLBLENDCOLOREXT()