| /* $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 */ |