GLBLENDCOLOR(3G) |
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GLBLENDCOLOR(3G) |
NAME
glBlendColor - set the blend color
C SPECIFICATION
void
glBlendColor( GLclampf
red,
GLclampf
green,
GLclampf
blue,
GLclampf
alpha )
delim$$
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)