glBlendColor : PyOpenGL 3.0.1b2 GL Man Pages

set the blend color

Signature

glBlendColor( GLclampf ( red ) , GLclampf ( green ) , GLclampf ( blue ) , GLclampf ( alpha ) )-> void

glBlendColor( red , green , blue , alpha )

glBlendColor(GLclampf(red), GLclampf(green), GLclampf(blue), GLclampf(alpha)) -> None

Parameters

Variables	Description
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

ARB_imaging

subset. glBlendColor is present only if

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

Copyright

1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/ .

glBlendColor