ncl_ngsrat man page

NGSRAT — save/restore/set NCAR GKS primitive attribute values in toto.

Synopsis

CALL NGSRAT(IOPT, IAT, RAT)

C-Binding Synopsis

#include <ncarg/ncargC.h>

void c_ngsrat(int iopt, int *iat, float *rat)

Description

IOPT
(an input variable of type INTEGER) indicating the desired action:
= 0
save the current settings of all attributes internal to the subroutine, i.e. not in the IAT and RAT arrays.
= 1
restore the context from the most recently saved state.
= 2

return the current context in the output arrays IAT (integer attributes) and RAT (floating-point attributes) as follows:

IAT contains integer GKS attribute settings as per:

IAT( 1) = Clip indicator

IAT( 2) = Line type

IAT( 3) = Polyline color index

IAT( 4) = Marker type

IAT( 5) = Polymarker color index

IAT( 6) = Text font

IAT( 7) = Text precision

IAT( 8) = Text color index

IAT( 9) = Text path

IAT(10) = Text horizontal alignment

IAT(11) = Text vertical alignment

IAT(12) = Fill area interior style

IAT(13) = Fill are style index

IAT(14) = Fill area color index

RAT contains REAL GKS attribute settings as per:

RAT( 1) = Linewidth scale factor

RAT( 2) = Marker scale factor

RAT( 3) = Character expansion factor

RAT( 4) = Character spacing

RAT( 5) = Character height in world coordinates

RAT( 6) = Character up vector, X component in world coordinates

RAT( 7) = Character up vector, Y component in world coordinates

= 3
set the context to the values specified in the IAT and RAT arrays (as described above).
IAT
An integer array, of length 14, that has meaning only if IOPT equals 2 or 3. The elements of the IAT array are described in the above description of IOPT.
RAT
A real array, of length 7, that has meaning only if IOPT equals 2 or 3. The elements of the IAT array are described in the above description of IOPT.

Usage

If you want to save the state of the NCAR GKS primitive attribute settings, call NGSRAT with a first argument of 0. When the first argument is 0, the IAT and RAT arrays (second and third arguments) are ignored and the state values are stored internally to NGSRAT.

To restore the NCAR GKS primitive attribute values to what they were as of the last time NGSRAT was called with argument IOPT = 0, then call NGSRAT with first argument of 1. IAT and RAT are ignored in this case.

If you call NGSRAT with a fist argument of 2, then the current settings of the NCAR GKS primitive attribute values are returned in arrays IAT and RAT as per the description of IAT and RAT above.

If you call NGSRAT with a fist argument of 3, then arrays IAT and RAT must be supplied and the values therein will be used to set the NCAR GKS primitive attribute values as per the description of IAT and RAT above.

A common use of NGSRAT would be in conjunction with NGMFTC and NGREOP for saving the GKS state after writing to one metafile, writing to a new metafile, and then restoring the GKS state when reopening the initial metafile.

Examples

The following sequence:

CALL NGSRAT(0,IAT,RAT)

  ... do some setting and drawing

CALL NGSRAT(1,IAT,RAT)

would save the values of all NCAR GKS primitive attributes before the code that does setting and drawing and then restore the attribute values after the setting and drawing.

Use the ncargex command to see the following relevant example: pgkex27.

Access

To use NGSRAT or c_ngsrat, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in that order.

Messages

NGSRAT issues no messages apart from potential illegal setting of the attribute values when IOPT = 3.

See Also

Online: ngmftc(3NCARG), ngreop(3NCARG),

Hardcopy: NCAR Graphics Fundamentals, UNIX Version.

Info

October 1996 UNIX NCAR GRAPHICS