sync code with last improvements from OpenBSD

doc/gl-docs/GL/gl/genlists.3gl

@@ -0,0 +1,49 @@
+'\" e
+'\"! eqn | mmdoc
+'\"macro stdmacro
+.ds Vn Version 1.2
+.ds Dt 24 September 1999
+.ds Re Release 1.2.1
+.ds Dp Jan 14 18:30
+.ds Dm 01 genlists.
+.ds Xs 2609 3 genlists.gl
+.TH GLGENLISTS 3G
+.SH NAME
+.B "glGenLists
+\- generate a contiguous set of empty display lists
+
+.SH C SPECIFICATION
+GLuint \f3glGenLists\fP(
+GLsizei \fIrange\fP )
+.nf
+.fi
+
+.SH PARAMETERS
+.TP \w'\f2range\fP\ \ 'u 
+\f2range\fP
+Specifies the number of contiguous empty display lists
+to be generated.
+.SH DESCRIPTION
+\%\f3glGenLists\fP has one argument, \f2range\fP.
+It returns an integer \f2n\fP such that \f2range\fP contiguous
+empty display lists,
+named \f2n\fP, \f2n\fP+1, ..., \f2n\fP+\f2range\fP \-1,
+are created.
+If \f2range\fP is 0,
+if there is no group of \f2range\fP contiguous names available,
+or if any error is generated,
+no display lists are generated,
+and 0 is returned.
+.SH ERRORS
+\%\f3GL_INVALID_VALUE\fP is generated if \f2range\fP is negative.
+.P
+\%\f3GL_INVALID_OPERATION\fP is generated if \%\f3glGenLists\fP
+is executed between the execution of \%\f3glBegin\fP
+and the corresponding execution of \%\f3glEnd\fP.
+.SH ASSOCIATED GETS
+\%\f3glIsList\fP
+.SH SEE ALSO
+\%\f3glCallList(3G)\fP,
+\%\f3glCallLists(3G)\fP,
+\%\f3glDeleteLists(3G)\fP,
+\%\f3glNewList(3G)\fP