fglBlendColor(3G) OpenGL Reference fglBlendColor(3G)NAME
fglBlendColor - set the blend color
FORTRAN SPECIFICATION
SUBROUTINE fglBlendColor( REAL*4 red,
REAL*4 green,
REAL*4 blue,
REAL*4 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 fglBlendFunc for a complete description of the
blending operations. Initially the GL_BLEND_COLOR is set to (0, 0, 0,
0).
NOTES
fglBlendColor is part of the GL_ARB_imaging subset. fglBlendColor is
present only if GL_ARB_imaging is returned when fglGetString is called
with GL_EXTENSIONS as its argument.
ERRORS
GL_INVALID_OPERATION is generated if fglBlendColor is executed between
the execution of fglBegin and the corresponding execution of fglEnd.
ASSOCIATED GETS
fglGet with an argument of GL_BLEND_COLOR
SEE ALSO
fglBlendEquation, fglBlendFunc, fglGetString
Page 1