PLplot: disptab.h Source File

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disptab.h
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1 // $Id: disptab.h 12830 2013-12-09 14:12:01Z andrewross $
2 //
3 // Defines the data structure which holds the driver functions.
4 //
5
6 #ifndef __DISPATCH_H__
7 #define __DISPATCH_H__
8
9 #include "plConfig.h"
10
11 struct PLStream_struct;
12
13 enum
14 {
15 plDevType_FileOriented = 0,
16 plDevType_Interactive = 1,
17 plDevType_Null = -1
18 };
19
20 //--------------------------------------------------------------------------
21 // Define structure containing pointers to device dependent functions.
22 //
23 // pl_MenuStr Pointer to string that is printed in device menu.
24 //
25 // pl_DevName A short device "name" for device selection by name.
26 //
27 // pl_type 0 for file-oriented device, 1 for interactive
28 // (the null driver uses -1 here)
29 //
30 // pl_seq The sequence number for ordering the presentation list of the
31 // available drivers. This is an ordering only, not an absolute
32 // position in the list.
33 //
34 // pl_init Initialize device. This routine may also prompt the user
35 // for certain device parameters or open a graphics file
36 // (see note). Called only once to set things up. Certain
37 // options such as familying and resolution (dots/mm) should
38 // be set up before calling this routine (note: some drivers
39 // ignore these).
40 //
41 // pl_line Draws a line between two points.
42 //
43 // pl_polyline Draws a polyline (no broken segments).
44 //
45 // pl_eop Finishes out current page (see note).
46 //
47 // pl_bop Set up for plotting on a new page. May also open a new
48 // a new graphics file (see note).
49 //
50 // pl_tidy Tidy up. May close graphics file (see note).
51 //
52 // pl_state Handle change in PLStream state
53 // (color, pen width, fill attribute, etc).
54 //
55 // pl_esc Escape function for driver-specific commands.
56 //
57 //
58 // Notes:
59 //
60 // Most devices allow multi-page plots to be stored in a single graphics
61 // file, in which case the graphics file should be opened in the pl_init()
62 // routine, closed in pl_tidy(), and page advances done by calling pl_eop
63 // and pl_bop() in sequence. If multi-page plots need to be stored in
64 // different files then pl_bop() should open the file and pl_eop() should
65 // close it. Do NOT open files in both pl_init() and pl_bop() or close
66 // files in both pl_eop() and pl_tidy().
67 //--------------------------------------------------------------------------
68
69 typedef void ( *plD_init_fp )( struct PLStream_struct * );
70 typedef void ( *plD_line_fp )( struct PLStream_struct *, short, short, short, short );
71 typedef void ( *plD_polyline_fp )( struct PLStream_struct *, short *, short *, PLINT );
72 typedef void ( *plD_eop_fp )( struct PLStream_struct * );
73 typedef void ( *plD_bop_fp )( struct PLStream_struct * );
74 typedef void ( *plD_tidy_fp )( struct PLStream_struct * );
75 typedef void ( *plD_state_fp )( struct PLStream_struct *, PLINT );
76 typedef void ( *plD_esc_fp )( struct PLStream_struct *, PLINT, void * );
77
78 typedef struct
79 {
80 char *pl_MenuStr;
81 char *pl_DevName;
82 int pl_type;
83 int pl_seq;
84 plD_init_fp pl_init;
85 plD_line_fp pl_line;
86 plD_polyline_fp pl_polyline;
87 plD_eop_fp pl_eop;
88 plD_bop_fp pl_bop;
89 plD_tidy_fp pl_tidy;
90 plD_state_fp pl_state;
91 plD_esc_fp pl_esc;
92 } PLDispatchTable;
93
94 #endif // __DISPATCH_H__