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glBlendColor — set the blend color

C Specification

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


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 ARB_imaging subset. glBlendColor is present only if 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.

Associated Gets

glGet with an argument of GL_BLEND_COLOR

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