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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/*
* $Xorg: extutil.h,v 1.4 2001/02/09 02:03:24 xorgcvs Exp $
*
Copyright 1989, 1998 The Open Group
Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.
*
* Author: Jim Fulton, MIT The Open Group
*
* Xlib Extension-Writing Utilities
*
* This package contains utilities for writing the client API for various
* protocol extensions. THESE INTERFACES ARE NOT PART OF THE X STANDARD AND
* ARE SUBJECT TO CHANGE!
*/
/* $XFree86: xc/include/extensions/extutil.h,v 1.10 2003/11/17 22:20:03 dawes Exp $ */
#ifndef _EXTUTIL_H_
#define _EXTUTIL_H_
#include <X11/extensions/Xext.h>
/*
* We need to keep a list of open displays since the Xlib display list isn't
* public. We also have to per-display info in a separate block since it isn't
* stored directly in the Display structure.
*/
typedef struct _XExtDisplayInfo {
struct _XExtDisplayInfo *next; /* keep a linked list */
Display *display; /* which display this is */
XExtCodes *codes; /* the extension protocol codes */
XPointer data; /* extra data for extension to use */
} XExtDisplayInfo;
typedef struct _XExtensionInfo {
XExtDisplayInfo *head; /* start of list */
XExtDisplayInfo *cur; /* most recently used */
int ndisplays; /* number of displays */
} XExtensionInfo;
typedef struct _XExtensionHooks {
int (*create_gc)(
Display* /* display */,
GC /* gc */,
XExtCodes* /* codes */
);
int (*copy_gc)(
Display* /* display */,
GC /* gc */,
XExtCodes* /* codes */
);
int (*flush_gc)(
Display* /* display */,
GC /* gc */,
XExtCodes* /* codes */
);
int (*free_gc)(
Display* /* display */,
GC /* gc */,
XExtCodes* /* codes */
);
int (*create_font)(
Display* /* display */,
XFontStruct* /* fs */,
XExtCodes* /* codes */
);
int (*free_font)(
Display* /* display */,
XFontStruct* /* fs */,
XExtCodes* /* codes */
);
int (*close_display)(
Display* /* display */,
XExtCodes* /* codes */
);
Bool (*wire_to_event)(
Display* /* display */,
XEvent* /* re */,
xEvent* /* event */
);
Status (*event_to_wire)(
Display* /* display */,
XEvent* /* re */,
xEvent* /* event */
);
int (*error)(
Display* /* display */,
xError* /* err */,
XExtCodes* /* codes */,
int* /* ret_code */
);
char *(*error_string)(
Display* /* display */,
int /* code */,
XExtCodes* /* codes */,
char* /* buffer */,
int /* nbytes */
);
} XExtensionHooks;
extern XExtensionInfo *XextCreateExtension(
void
);
extern void XextDestroyExtension(
XExtensionInfo* /* info */
);
extern XExtDisplayInfo *XextAddDisplay(
XExtensionInfo* /* extinfo */,
Display* /* dpy */,
char* /* ext_name */,
XExtensionHooks* /* hooks */,
int /* nevents */,
XPointer /* data */
);
extern int XextRemoveDisplay(
XExtensionInfo* /* extinfo */,
Display* /* dpy */
);
extern XExtDisplayInfo *XextFindDisplay(
XExtensionInfo* /* extinfo */,
Display* /* dpy */
);
#define XextHasExtension(i) ((i) && ((i)->codes))
#define XextCheckExtension(dpy,i,name,val) \
if (!XextHasExtension(i)) { XMissingExtension (dpy, name); return val; }
#define XextSimpleCheckExtension(dpy,i,name) \
if (!XextHasExtension(i)) { XMissingExtension (dpy, name); return; }
/*
* helper macros to generate code that is common to all extensions; caller
* should prefix it with static if extension source is in one file; this
* could be a utility function, but have to stack 6 unused arguments for
* something that is called many, many times would be bad.
*/
#define XEXT_GENERATE_FIND_DISPLAY(proc,extinfo,extname,hooks,nev,data) \
XExtDisplayInfo *proc (Display *dpy) \
{ \
XExtDisplayInfo *dpyinfo; \
if (!extinfo) { if (!(extinfo = XextCreateExtension())) return NULL; } \
if (!(dpyinfo = XextFindDisplay (extinfo, dpy))) \
dpyinfo = XextAddDisplay (extinfo,dpy,extname,hooks,nev,data); \
return dpyinfo; \
}
#define XEXT_FIND_DISPLAY_PROTO(proc) \
XExtDisplayInfo *proc(Display *dpy)
#define XEXT_GENERATE_CLOSE_DISPLAY(proc,extinfo) \
int proc (Display *dpy, XExtCodes *codes) \
{ \
return XextRemoveDisplay (extinfo, dpy); \
}
#define XEXT_CLOSE_DISPLAY_PROTO(proc) \
int proc(Display *dpy, XExtCodes *codes)
#define XEXT_GENERATE_ERROR_STRING(proc,extname,nerr,errl) \
char *proc (Display *dpy, int code, XExtCodes *codes, char *buf, int n) \
{ \
code -= codes->first_error; \
if (code >= 0 && code < nerr) { \
char tmp[256]; \
sprintf (tmp, "%s.%d", extname, code); \
XGetErrorDatabaseText (dpy, "XProtoError", tmp, errl[code], buf, n); \
return buf; \
} \
return (char *)0; \
}
#define XEXT_ERROR_STRING_PROTO(proc) \
char *proc(Display *dpy, int code, XExtCodes *codes, char *buf, int n)
#endif
|
