glBlendColor
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Name

glBlendColor — set the blend color

C Specification

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

Python Specification

glBlendColor ( red , green , blue , alpha ) →  None

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 , glBlendFunc , glGetString

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