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
|
/* $Xorg: lbxdeltastr.h,v 1.3 2000/08/18 04:05:45 coskrey Exp $ */
/*
* Copyright 1993 Network Computing Devices
*
* 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, and that the name of NCD. not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. NCD. makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* NCD. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NCD.
* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#ifndef LBX_DELTA_STRUCT_H
#define LBX_DELTA_STRUCT_H
#define MIN_CACHEABLE_LEN 8
#define DELTA_CACHEABLE(pcache, len) \
((len) > MIN_CACHEABLE_LEN && (len) <= (pcache)->maxDeltasize)
/*
* An entry in the delta compactor cache
*/
typedef struct _LBXDeltaElem {
int length;
unsigned char *buf;
} LBXDeltaElemRec, *LBXDeltaElemPtr;
/*
* Delta compactor cache
*/
typedef struct _LBXDeltas {
unsigned short nDeltas;
unsigned short maxDeltasize;
LBXDeltaElemPtr deltas;
unsigned short nextDelta;
unsigned short activeDeltas; /* only needed for outgoing */
} LBXDeltasRec, *LBXDeltasPtr;
/*
* Motion delta cache
*/
typedef struct {
BYTE swapped;
BYTE detail;
CARD16 sequenceNumber B16;
Time time B32;
Window root B32, event B32, child B32;
INT16 rootX B16, rootY B16, eventX B16, eventY B16;
KeyButMask state B16;
BOOL sameScreen;
} lbxMotionCache;
/*
* Motion delta events
*/
typedef struct {
BYTE type; /* always eventBase + LbxQuickMotionDeltaEvent */
CARD8 deltaTime;
INT8 deltaX;
INT8 deltaY;
} lbxQuickMotionDeltaEvent;
#define sz_lbxQuickMotionDeltaEvent 4
typedef struct {
BYTE type; /* always eventBase + LbxEvent */
BYTE lbxType; /* LbxMotionDeltaEvent */
INT8 deltaX;
INT8 deltaY;
CARD16 deltaTime B16;
CARD16 deltaSequence B16;
} lbxMotionDeltaEvent;
#define sz_lbxMotionDeltaEvent 8
extern int LBXInitDeltaCache ( LBXDeltasPtr pcache, int nDeltas,
int maxDeltasize );
extern void LBXFreeDeltaCache ( LBXDeltasPtr pcache );
extern int LBXDeltaMinDiffs ( LBXDeltasPtr pcache, unsigned char *inmsg,
int inmsglen, int maxdiff, int *pindex );
extern void LBXEncodeDelta ( LBXDeltasPtr pcache, unsigned char *inmsg,
int ndiff, int index, unsigned char *buf );
extern int LBXDecodeDelta ( LBXDeltasPtr pcache, xLbxDiffItem *deltas,
int ndiff, int index, unsigned char **buf );
extern void LBXAddDeltaOut ( LBXDeltasPtr pcache, unsigned char *inmsg,
int inmsglen );
extern void LBXAddDeltaIn ( LBXDeltasPtr pcache, unsigned char *inmsg,
int inmsglen );
#endif /* LBX_DELTA_STRUCT_H */
|
