glBlendColor

GLBLENDCOLOR(3G)					     GLBLENDCOLOR(3G)



NAME
       glBlendColor - set the blend color


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


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

DESCRIPTION
       The GL_BLEND_COLOR may be used to calculate the source and destination
       blending factors. The color components are clamped to the range [0, 1]
       before being stored. See glBlendFunc for a complete description of the
       blending operations.  Initially the GL_BLEND_COLOR is set to (0, 0, 0,
       0).

NOTES
       glBlendColor  is	 part  of  the GL_ARB_imaging subset. glBlendColor is
       present only if GL_ARB_imaging is returned when glGetString is  called
       with GL_EXTENSIONS as its argument.

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


ASSOCIATED GETS
       glGet with an argument of GL_BLEND_COLOR

SEE ALSO
       glBlendEquation(3G), glBlendFunc(3G), glGetString(3G)



							     GLBLENDCOLOR(3G)