1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/* Copyright (C) 1996, Russell Lang. All rights reserved.
Portions Copyright (C) 1999 Aladdin Enterprises. All rights reserved.
This software is licensed to a single customer by Artifex Software Inc.
under the terms of a specific OEM agreement.
*/
// $RCSfile$ $Revision$
// gsdll_class for MS-Windows
#ifndef dwdll_INCLUDED
# define dwdll_INCLUDED
extern "C" {
#include "gsdll.h"
#include "gsdllwin.h"
}
class gsdll_class {
// instance of caller
HINSTANCE hinstance;
// handle to DLL. Non-zero of loaded.
HINSTANCE hmodule;
// handle to parent window. Can be NULL.
HWND hwnd;
// text description of last error
char last_error[128];
// true if init and execute_begin have been called
BOOL initialized;
// return code from last c_execute_end
int execute_code;
// pointer to callback from DLL
GSDLL_CALLBACK callback;
// pointers to DLL functions
PFN_gsdll_revision c_revision;
PFN_gsdll_init c_init;
PFN_gsdll_execute_begin c_execute_begin;
PFN_gsdll_execute_cont c_execute_cont;
PFN_gsdll_execute_end c_execute_end;
PFN_gsdll_exit c_exit;
PFN_gsdll_lock_device c_lock_device;
PFN_gsdll_copy_dib c_copy_dib;
PFN_gsdll_copy_palette c_copy_palette;
PFN_gsdll_draw c_draw;
// pointer to os2dll or mswindll device
// this needs to be extended to support multiple devices
// also need to have one window per device
char FAR *device;
public:
// Load DLL
// Arguments:
// instance of calling EXE
// name of DLL, may include path
// expected version number of DLL
// Returns:
// zero on success
// non-zero on error. Error message available from get_last_error()
// do nothing if DLL already loaded
int load(const HINSTANCE hinstance, const char *name, const long version);
// Get revision number of DLL
int revision(char FAR * FAR *, char FAR * FAR *, long FAR *, long FAR *);
// Unload DLL
int unload(void);
// Initialise DLL
// Arguments:
// pointer to C callback function
// window handle of parent
// argc (normal C command line)
// argv (normal C command line)
int init(GSDLL_CALLBACK callback, HWND hwnd, int argc, char FAR * FAR * argv);
// Restart DLL
int restart(int argc, char FAR * FAR * argv);
// Execute string
int execute(const char FAR *, int len);
// Get last error string
int get_last_error(char *str, int len);
// lock device
int gsdll_class::lock_device(const char FAR * device, int lock);
// draw bitmap
int gsdll_class::draw(const char FAR * device, HDC hdc, int dx, int dy, int wx, int wy, int sx, int sy);
// copy bitmap
HGLOBAL gsdll_class::copy_dib(const char FAR * device);
// copy palette
HPALETTE gsdll_class::copy_palette(const char FAR * device);
};
#endif /* dwdll_INCLUDED */
|
