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// $Id: disptab.h 12830 2013-12-09 14:12:01Z andrewross $
//
// Defines the data structure which holds the driver functions.
//

#ifndef __DISPATCH_H__
#define __DISPATCH_H__

#include "plConfig.h"

struct PLStream_struct;

enum
{
    plDevType_FileOriented = 0,
    plDevType_Interactive  = 1,
    plDevType_Null         = -1
};

//--------------------------------------------------------------------------
// Define structure containing pointers to device dependent functions.
//
// pl_MenuStr	Pointer to string that is printed in device menu.
//
// pl_DevName	A short device "name" for device selection by name.
//
// pl_type	0 for file-oriented device, 1 for interactive
//		(the null driver uses -1 here)
//
// pl_seq       The sequence number for ordering the presentation list of the
//              available drivers.  This is an ordering only, not an absolute
//              position in the list.
//
// pl_init	Initialize device.  This routine may also prompt the user
//		for certain device parameters or open a graphics file
//		(see note).  Called only once to set things up.  Certain
//		options such as familying and resolution (dots/mm) should
//		be set up before calling this routine (note: some drivers
//		ignore these).
//
// pl_line	Draws a line between two points.
//
// pl_polyline	Draws a polyline (no broken segments).
//
// pl_eop	Finishes out current page (see note).
//
// pl_bop	Set up for plotting on a new page. May also open a new
//		a new graphics file (see note).
//
// pl_tidy	Tidy up. May close graphics file (see note).
//
// pl_state	Handle change in PLStream state
//		(color, pen width, fill attribute, etc).
//
// pl_esc	Escape function for driver-specific commands.
//
//
// Notes:
//
// Most devices allow multi-page plots to be stored in a single graphics
// file, in which case the graphics file should be opened in the pl_init()
// routine, closed in pl_tidy(), and page advances done by calling pl_eop
// and pl_bop() in sequence. If multi-page plots need to be stored in
// different files then pl_bop() should open the file and pl_eop() should
// close it.  Do NOT open files in both pl_init() and pl_bop() or close
// files in both pl_eop() and pl_tidy().
//--------------------------------------------------------------------------

typedef void ( *plD_init_fp )( struct PLStream_struct * );
typedef void ( *plD_line_fp )( struct PLStream_struct *, short, short, short, short );
typedef void ( *plD_polyline_fp )( struct PLStream_struct *, short *, short *, PLINT );
typedef void ( *plD_eop_fp )( struct PLStream_struct * );
typedef void ( *plD_bop_fp )( struct PLStream_struct * );
typedef void ( *plD_tidy_fp )( struct PLStream_struct * );
typedef void ( *plD_state_fp )( struct PLStream_struct *, PLINT );
typedef void ( *plD_esc_fp )( struct PLStream_struct *, PLINT, void * );

typedef struct
{
    char            *pl_MenuStr;
    char            *pl_DevName;
    int             pl_type;
    int             pl_seq;
    plD_init_fp     pl_init;
    plD_line_fp     pl_line;
    plD_polyline_fp pl_polyline;
    plD_eop_fp      pl_eop;
    plD_bop_fp      pl_bop;
    plD_tidy_fp     pl_tidy;
    plD_state_fp    pl_state;
    plD_esc_fp      pl_esc;
} PLDispatchTable;

#endif // __DISPATCH_H__