ncl_gqcr man page

GQCR (Inquire color representation) — retrieves the color value associated with a color index on a particular workstation.

Synopsis

CALL GQCR (WKID, CI, TYPE, ERRIND, CR, CG, CB)

C-Binding Synopsis

#include <ncarg/gks.h>

void ginq_colr_rep(Gint ws_id, Gint colr_ind, Ginq_type type, Gint *err_ind, Gcolr_rep *colr_rep);

Description

WKID
(Integer, Input) - Gives a workstation identifier as was set in a previous call to GOPWK.
CI
(Integer, Input) - A color index.
TYPE

(Integer, Input) - Specifies whether the returned color values are the ones that were specified by a call to GSCR or whether they are the color values that are actually being used on the specified workstation (frequently a workstation will not be able to represent a requested color value precisely).

0
Returns the color value set for index CI either by default or by a call to GSCR.
1
Returns the color value actually used by the workstation to represent the requested color.
ERRIND
(Integer, Output) - If the inquired values cannot be returned correctly, a non-zero error indicator is returned in ERRIND, otherwise a zero is returned. Consult "User's Guide for NCAR GKS-0A Graphics" for a description of the meaning of the error indicators.
CR
(Real, Output) - Returns an intensity value for red in the range 0. to 1. inclusive.
CG
(Real, Output) - Returns an intensity value for green in the range 0. to 1. inclusive.
CB
(Real, Output) - Returns an intensity value for blue in the range 0. to 1. inclusive.

Usage

For details on setting and using color indices see the man page for GSCR.

Access

To use GKS routines, load the NCAR GKS-0A library ncarg_gks.

See Also

Online: gscr, gsplci, gsmkci, gstxci, gsfaci, ginq_colr_rep

Hardcopy: User's Guide for NCAR GKS-0A Graphics; NCAR Graphics Fundamentals, UNIX Version

Info

March 1993 UNIX NCAR GRAPHICS