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glBlendColor - set the blend color
void glBlendColor(
GLclampf red,
GLclampf green,
GLclampf blue,
GLclampf alpha )
eqn not supported
- red, green, blue, alpha
- specify the components
of GL_BLEND_COLOR
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.
GL_INVALID_OPERATION is generated
if glBlendColor is executed between the execution of glBegin and the corresponding
execution of glEnd.
glGet with an argument of GL_BLEND_COLOR
glBlendEquation(3G)
, glBlendFunc(3G)
, glGetString(3G)
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