void glBlendColor
|
( |
GLclampf red
, GLclampf green
, GLclampf blue
, GLclampf alpha
); |
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).
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.