'\" e '\"macro stdmacro .ds Vn Version 1.2 .ds Dt 24 September 1999 .ds Re Release 1.2.1 .ds Dp May 22 14:44 .ds Dm 1 May 22 14: .ds Xs 21257 4 .TH GLBLENDCOLOR 3G .SH NAME .B "glBlendColor \- set the blend color .SH C SPECIFICATION void \f3glBlendColor\fP( GLclampf \fIred\fP, .nf .ta \w'\f3void \fPglBlendColor( 'u GLclampf \fIgreen\fP, GLclampf \fIblue\fP, GLclampf \fIalpha\fP ) .fi .EQ delim $$ .EN .SH PARAMETERS .TP \w'\f2red\fP\ \f2green\fP\ \f2blue\fP\ \f2alpha\fP\ \ 'u \f2red\fP, \f2green\fP, \f2blue\fP, \f2alpha\fP specify the components of \%\f3GL_BLEND_COLOR\fP .SH DESCRIPTION The \%\f3GL_BLEND_COLOR\fP 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 \%\f3glBlendFunc\fP for a complete description of the blending operations. Initially the \%\f3GL_BLEND_COLOR\fP is set to (0, 0, 0, 0). .SH NOTES \%\f3glBlendColor\fP is part of the \%\f3GL_ARB_imaging\fP subset. \%\f3glBlendColor\fP is present only if \%\f3GL_ARB_imaging\fP is returned when \%\f3glGetString\fP is called with \%\f3GL_EXTENSIONS\fP as its argument. .SH ERRORS \%\f3GL_INVALID_OPERATION\fP is generated if \%\f3glBlendColor\fP is executed between the execution of \%\f3glBegin\fP and the corresponding execution of \%\f3glEnd\fP. .P .SH ASSOCIATED GETS \%\f3glGet\fP with an argument of \%\f3GL_BLEND_COLOR\fP .SH SEE ALSO \%\f3glBlendEquation\fP, \%\f3glBlendFunc\fP, \%\f3glGetString\fP