1 /* $Xorg: lbxdeltastr.h,v 1.3 2000/08/18 04:05:45 coskrey Exp $ */ 2 /* 3 * Copyright 1993 Network Computing Devices 4 * 5 * Permission to use, copy, modify, distribute, and sell this software and its 6 * documentation for any purpose is hereby granted without fee, provided that 7 * the above copyright notice appear in all copies and that both that 8 * copyright notice and this permission notice appear in supporting 9 * documentation, and that the name of NCD. not be used in advertising or 10 * publicity pertaining to distribution of the software without specific, 11 * written prior permission. NCD. makes no representations about the 12 * suitability of this software for any purpose. It is provided "as is" 13 * without express or implied warranty. 14 * 15 * NCD. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NCD. 17 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 19 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 20 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 21 * 22 */ 23 24 #ifndef LBX_DELTA_STRUCT_H 25 #define LBX_DELTA_STRUCT_H 26 27 #define MIN_CACHEABLE_LEN 8 28 29 #define DELTA_CACHEABLE(pcache, len) \ 30 ((len) > MIN_CACHEABLE_LEN && (len) <= (pcache)->maxDeltasize) 31 32 /* 33 * An entry in the delta compactor cache 34 */ 35 typedef struct _LBXDeltaElem { 36 int length; 37 unsigned char *buf; 38 } LBXDeltaElemRec, *LBXDeltaElemPtr; 39 40 41 /* 42 * Delta compactor cache 43 */ 44 typedef struct _LBXDeltas { 45 unsigned short nDeltas; 46 unsigned short maxDeltasize; 47 LBXDeltaElemPtr deltas; 48 unsigned short nextDelta; 49 unsigned short activeDeltas; /* only needed for outgoing */ 50 } LBXDeltasRec, *LBXDeltasPtr; 51 52 53 /* 54 * Motion delta cache 55 */ 56 57 typedef struct { 58 BYTE swapped; 59 BYTE detail; 60 CARD16 sequenceNumber B16; 61 Time time B32; 62 Window root B32, event B32, child B32; 63 INT16 rootX B16, rootY B16, eventX B16, eventY B16; 64 KeyButMask state B16; 65 BOOL sameScreen; 66 } lbxMotionCache; 67 68 69 /* 70 * Motion delta events 71 */ 72 73 typedef struct { 74 BYTE type; /* always eventBase + LbxQuickMotionDeltaEvent */ 75 CARD8 deltaTime; 76 INT8 deltaX; 77 INT8 deltaY; 78 } lbxQuickMotionDeltaEvent; 79 #define sz_lbxQuickMotionDeltaEvent 4 80 81 typedef struct { 82 BYTE type; /* always eventBase + LbxEvent */ 83 BYTE lbxType; /* LbxMotionDeltaEvent */ 84 INT8 deltaX; 85 INT8 deltaY; 86 CARD16 deltaTime B16; 87 CARD16 deltaSequence B16; 88 } lbxMotionDeltaEvent; 89 #define sz_lbxMotionDeltaEvent 8 90 91 extern int LBXInitDeltaCache ( LBXDeltasPtr pcache, int nDeltas, 92 int maxDeltasize ); 93 extern void LBXFreeDeltaCache ( LBXDeltasPtr pcache ); 94 extern int LBXDeltaMinDiffs ( LBXDeltasPtr pcache, unsigned char *inmsg, 95 int inmsglen, int maxdiff, int *pindex ); 96 extern void LBXEncodeDelta ( LBXDeltasPtr pcache, unsigned char *inmsg, 97 int ndiff, int index, unsigned char *buf ); 98 extern int LBXDecodeDelta ( LBXDeltasPtr pcache, xLbxDiffItem *deltas, 99 int ndiff, int index, unsigned char **buf ); 100 extern void LBXAddDeltaOut ( LBXDeltasPtr pcache, unsigned char *inmsg, 101 int inmsglen ); 102 extern void LBXAddDeltaIn ( LBXDeltasPtr pcache, unsigned char *inmsg, 103 int inmsglen ); 104 105 #endif /* LBX_DELTA_STRUCT_H */ 106
