Types and Constants

The Display PostScript Client Library is composed of system-dependent and a system-independent parts. The Display PostScript System, Client Library Reference Manual, by Adobe Systems, Incorporated, provides the specification for the system-independent portion of this library.

The defined types, enumeration constants, and global variables that are part of OpenStep's system-dependent part of the Display PostScript Client Library are listed here.

Defined Types

Number Formats

typedef enum _DPSNumberFormat {

#ifdef __BIG_ENDIAN__

• dps_float = 48,

• dps_long = 0,

• dps_short = 32

  #else

• dps_float = 48+128,

• dps_long = 0+128,

• dps_short = 32+128

} DPSNumberFormat;

Other permitted values are:

• For 32-bit fixed-point numbers, use dps_long plus the number of bits in the fractional part.
• For 16-bit fixed-point numbers, use dps_short plus the number of bits in the fractional part.

Backing Store Types

typedef enum _NSBackingStoreType {

• NSBackingStoreRetained,

• NSBackingStoreNonretained,

• NSBackingStoreBuffered

Compositing Operations

typedef enum _NSCompositingOperation {

• NSCompositeClear,

• NSCompositeCopy,

• NSCompositeSourceOver,

• NSCompositeSourceIn,

• NSCompositeSourceOut,

• NSCompositeSourceAtop,

• NSCompositeDataOver,

• NSCompositeDataIn,

• NSCompositeDataOut,

• NSCompositeDataAtop,

• NSCompositeXOR,

• NSCompositePlusDarker,

• NSCompositeHighlight,

• NSCompositePlusLighter

Window Ordering

typedef enum _NSWindowOrderingMode {

• NSWindowAbove,

• NSWindowBelow,

• NSWindowOut

User Path Operators

These constants define the operator numbers used to construct the operator array parameter of DPSDoUserPath.

typedef unsigned char DPSUserPathOp;

enum {

• dps_setbbox,

• dps_moveto,

• dps_rmoveto,

• dps_lineto,

• dps_rlineto,

• dps_curveto,

• dps_rcurveto,

• dps_arc,

• dps_arcn,

• dps_arct,

• dps_closepath,

• dps_ucache

User Path Actions

These constants define the action of a DPSDoUserPath. In addition to the actions defined here, any other system name index may be used. See the PostScript Language Reference Manual, Second Edition, by Adobe Systems Incorporated, for a detailed list of system name indexes.

typedef enum _DPSUserPathAction {

• dps_uappend,

• dps_ufill,

• dps_ueofill,

• dps_ustroke,

• dps_ustrokepath,

• dps_inufill,

• dps_inueofill,

• dps_inustroke,

• dps_def,

• dps_put

Enumerations

Special Values for Alpha

enum {

• NSAlphaEqualToData,

• NSAlphaAlwaysOne

User Object Representing the PostScript Null Object

enum {

• DPSNullObject

Symbolic Constants

Error Code Base

DPS_OPENSTEP_ERROR_BASE

Global Variables

Exception Names

• NSString *DPSPostscriptErrorException;

• NSString *DPSNameTooLongException;

• NSString *DPSResultTagCheckException;

• NSString *DPSResultTypeCheckException;

• NSString *DPSInvalidContextException;

• NSString *DPSSelectException;

• NSString *DPSConnectionClosedException;

• NSString *DPSReadException;

• NSString *DPSWriteException;

• NSString *DPSInvalidFDException;

• NSString *DPSInvalidTEException;

• NSString *DPSInvalidPortException;

• NSString *DPSOutOfMemoryException;

• NSString *DPSCantConnectException;