glBlendColor.3gl

Langue: en

Autres versions - même langue

Version: 47365 (openSuse - 09/10/07)

Section: 3 (Bibliothèques de fonctions)

Sommaire

NAME

glBlendColor - set the blend color

C SPECIFICATION

void glBlendColor( GLclampf red, 



                     GLclampf green,

                     GLclampf blue,

                     GLclampf alpha )

delim $$

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(3G), glBlendFunc(3G), glGetString(3G)