Name

glBlendColor — set the blend color

C Specification

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

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 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

See Also

glBlendEquation, glBlendFunc, glGetString

Copyright

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/.