NAME

glBlendColorEXT - set the blend color

C SPECIFICATION

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

PARAMETERS

GL_BLEND_COLOR_EXT

red, green, blue, alpha specify the components of

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.