glBlendColorEXT man page on DragonFly

glBlendColorEXT man page on DragonFly

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GLBLENDCOLOREXT()					     GLBLENDCOLOREXT()

NAME
       glBlendColorEXT - set the blend color

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

       delim $$

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 destina‐
       tion 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_EXTEN‐
       SIONS, 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()

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