graPHIGS Programming Interface: Subroutine Reference

The graPHIGS Programming Interface : Subroutine Reference

GPQGD - Inquire List of Generalized Drawing Primitives

GPQGD (wstype, start, number, errind, totnum, gdpid)

Note:

This subroutine is a Workstation Description Table (WDT) inquiry. For an overview, see "WDT Inquiries"

Purpose

Use GPQGD to inquire the available Generalized Drawing Primitives (GDPs) for the specified workstation type.

If the information is available, then the graPHIGS API sets the error indicator to zero and returns the values in the output parameter. If the error indicator is 543 (the start value exceeds the extent of the available data), then only the total number (totnum) parameter is set. If the inquired information is unavailable, then the error indicator (errind) contains the error number indicating the reason, and the values returned in the output parameter are unpredictable.

Parameters

wstype -- specified by user, 8-byte character string

Workstation type.

start -- specified by user, fullword integer

Starting member of the list of GDP identifiers (>=1)

number -- specified by user, fullword integer

Number of GDP identifiers requested (>=0)

errind -- returned by the graPHIGS API, fullword integer

Error indicator. If the error indicator is zero, the request has been completed. Otherwise, one of the following errors exists:

23: SPECIFIED WORKSTATION TYPE DOES NOT EXIST
35: WORKSTATION HAS ONLY INPUT CAPABILITIES
538: START VALUE < ONE
539: REQUESTED NUMBER < ZERO
543: START EXCEEDS DATA EXTENT. TOTAL NUMBER AVAILABLE RETURNED
548: SPECIFIED WORKSTATION TYPE CANNOT BE LOADED

totnum -- returned by the graPHIGS API, fullword integer

Total number of available GDPs.

gdpid -- returned by the graPHIGS API, array of fullword integers

List of GDP identifiers. One of the following GPD identifiers listed may be returned:

1001 - Pixel 3

1002 - Pixel 2

1003 - Disjoint Polyline 3

1004 - Disjoint Polyline 2

1005 - Circle 2

1006 - Circular Arc 2

1007 - Ellipse 2

1008 - Ellipse 3

1009 - Elliptical Arc 2

1010 - Elliptical Arc 3

1014 - Polyline Set 3 With Data

1016 - Polygon 3 With Data

1017 - Polygon 2 With Data

1020 - Marker Grid 3

1021 - Marker Grid 2

1022 - Line Grid 3

1023 - Line Grid 2

1027 - Composite Fill Area 2

1029 - Triangle Strip 3

1031 - Quadrilateral Mesh 3

1033 - Non-Uniform B-Spline Curve 3

1034 - Non-Uniform B-Spline Curve 2

1035 - Non-Uniform B-Spline Surface

1036 - Trimmed Non-Uniform B-Spline Surface

1037 - Polyhedron Edge

1039 - Character Line 2

1046 - Polysphere

The output array must be large enough to contain the requested data.

Error Codes

None

Related Subroutines

GPQRCT: Inquire Realized Connection Type

RCP code

201339660 (X'0C00330C')