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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/*
* Copyright (C) 2002 RealVNC Ltd. All Rights Reserved.
* Copyright (C) 2003 Sun Microsystems, Inc.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
/*
* zrle.c
*
* Routines to implement Zlib Run-length Encoding (ZRLE).
*/
#include "rfb/rfb.h"
#include "private.h"
#include "zrleoutstream.h"
#define GET_IMAGE_INTO_BUF(tx,ty,tw,th,buf) \
{ char *fbptr = (cl->scaledScreen->frameBuffer \
+ (cl->scaledScreen->paddedWidthInBytes * ty) \
+ (tx * (cl->scaledScreen->bitsPerPixel / 8))); \
\
(*cl->translateFn)(cl->translateLookupTable, &cl->screen->serverFormat,\
&cl->format, fbptr, (char*)buf, \
cl->scaledScreen->paddedWidthInBytes, tw, th); }
#define EXTRA_ARGS , rfbClientPtr cl
#define ENDIAN_LITTLE 0
#define ENDIAN_BIG 1
#define ENDIAN_NO 2
#define BPP 8
#define ZYWRLE_ENDIAN ENDIAN_NO
#include <zrleencodetemplate.c>
#undef BPP
#define BPP 15
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_LITTLE
#include <zrleencodetemplate.c>
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_BIG
#include <zrleencodetemplate.c>
#undef BPP
#define BPP 16
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_LITTLE
#include <zrleencodetemplate.c>
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_BIG
#include <zrleencodetemplate.c>
#undef BPP
#define BPP 32
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_LITTLE
#include <zrleencodetemplate.c>
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_BIG
#include <zrleencodetemplate.c>
#define CPIXEL 24A
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_LITTLE
#include <zrleencodetemplate.c>
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_BIG
#include <zrleencodetemplate.c>
#undef CPIXEL
#define CPIXEL 24B
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_LITTLE
#include <zrleencodetemplate.c>
#undef ZYWRLE_ENDIAN
#define ZYWRLE_ENDIAN ENDIAN_BIG
#include <zrleencodetemplate.c>
#undef CPIXEL
#undef BPP
/*
* zrleBeforeBuf contains pixel data in the client's format. It must be at
* least one pixel bigger than the largest tile of pixel data, since the
* ZRLE encoding algorithm writes to the position one past the end of the pixel
* data.
*/
/*
* rfbSendRectEncodingZRLE - send a given rectangle using ZRLE encoding.
*/
rfbBool rfbSendRectEncodingZRLE(rfbClientPtr cl, int x, int y, int w, int h)
{
zrleOutStream* zos;
rfbFramebufferUpdateRectHeader rect;
rfbZRLEHeader hdr;
int i;
char *zrleBeforeBuf;
if (cl->zrleBeforeBuf == NULL) {
cl->zrleBeforeBuf = (char *) malloc(rfbZRLETileWidth * rfbZRLETileHeight * 4 + 4);
}
zrleBeforeBuf = cl->zrleBeforeBuf;
if (cl->preferredEncoding == rfbEncodingZYWRLE) {
if (cl->tightQualityLevel < 0) {
cl->zywrleLevel = 1;
} else if (cl->tightQualityLevel < 3) {
cl->zywrleLevel = 3;
} else if (cl->tightQualityLevel < 6) {
cl->zywrleLevel = 2;
} else {
cl->zywrleLevel = 1;
}
} else
cl->zywrleLevel = 0;
if (!cl->zrleData)
cl->zrleData = zrleOutStreamNew();
zos = cl->zrleData;
zos->in.ptr = zos->in.start;
zos->out.ptr = zos->out.start;
switch (cl->format.bitsPerPixel) {
case 8:
zrleEncode8NE(x, y, w, h, zos, zrleBeforeBuf, cl);
break;
case 16:
if (cl->format.greenMax > 0x1F) {
if (cl->format.bigEndian)
zrleEncode16BE(x, y, w, h, zos, zrleBeforeBuf, cl);
else
zrleEncode16LE(x, y, w, h, zos, zrleBeforeBuf, cl);
} else {
if (cl->format.bigEndian)
zrleEncode15BE(x, y, w, h, zos, zrleBeforeBuf, cl);
else
zrleEncode15LE(x, y, w, h, zos, zrleBeforeBuf, cl);
}
break;
case 32: {
rfbBool fitsInLS3Bytes
= ((cl->format.redMax << cl->format.redShift) < (1<<24) &&
(cl->format.greenMax << cl->format.greenShift) < (1<<24) &&
(cl->format.blueMax << cl->format.blueShift) < (1<<24));
rfbBool fitsInMS3Bytes = (cl->format.redShift > 7 &&
cl->format.greenShift > 7 &&
cl->format.blueShift > 7);
if ((fitsInLS3Bytes && !cl->format.bigEndian) ||
(fitsInMS3Bytes && cl->format.bigEndian)) {
if (cl->format.bigEndian)
zrleEncode24ABE(x, y, w, h, zos, zrleBeforeBuf, cl);
else
zrleEncode24ALE(x, y, w, h, zos, zrleBeforeBuf, cl);
}
else if ((fitsInLS3Bytes && cl->format.bigEndian) ||
(fitsInMS3Bytes && !cl->format.bigEndian)) {
if (cl->format.bigEndian)
zrleEncode24BBE(x, y, w, h, zos, zrleBeforeBuf, cl);
else
zrleEncode24BLE(x, y, w, h, zos, zrleBeforeBuf, cl);
}
else {
if (cl->format.bigEndian)
zrleEncode32BE(x, y, w, h, zos, zrleBeforeBuf, cl);
else
zrleEncode32LE(x, y, w, h, zos, zrleBeforeBuf, cl);
}
}
break;
}
rfbStatRecordEncodingSent(cl, rfbEncodingZRLE, sz_rfbFramebufferUpdateRectHeader + sz_rfbZRLEHeader + ZRLE_BUFFER_LENGTH(&zos->out),
+ w * (cl->format.bitsPerPixel / 8) * h);
if (cl->ublen + sz_rfbFramebufferUpdateRectHeader + sz_rfbZRLEHeader
> UPDATE_BUF_SIZE)
{
if (!rfbSendUpdateBuf(cl))
return FALSE;
}
rect.r.x = Swap16IfLE(x);
rect.r.y = Swap16IfLE(y);
rect.r.w = Swap16IfLE(w);
rect.r.h = Swap16IfLE(h);
rect.encoding = Swap32IfLE(cl->preferredEncoding);
memcpy(cl->updateBuf+cl->ublen, (char *)&rect,
sz_rfbFramebufferUpdateRectHeader);
cl->ublen += sz_rfbFramebufferUpdateRectHeader;
hdr.length = Swap32IfLE(ZRLE_BUFFER_LENGTH(&zos->out));
memcpy(cl->updateBuf+cl->ublen, (char *)&hdr, sz_rfbZRLEHeader);
cl->ublen += sz_rfbZRLEHeader;
/* copy into updateBuf and send from there. Maybe should send directly? */
for (i = 0; i < ZRLE_BUFFER_LENGTH(&zos->out);) {
int bytesToCopy = UPDATE_BUF_SIZE - cl->ublen;
if (i + bytesToCopy > ZRLE_BUFFER_LENGTH(&zos->out)) {
bytesToCopy = ZRLE_BUFFER_LENGTH(&zos->out) - i;
}
memcpy(cl->updateBuf+cl->ublen, (uint8_t*)zos->out.start + i, bytesToCopy);
cl->ublen += bytesToCopy;
i += bytesToCopy;
if (cl->ublen == UPDATE_BUF_SIZE) {
if (!rfbSendUpdateBuf(cl))
return FALSE;
}
}
return TRUE;
}
void rfbFreeZrleData(rfbClientPtr cl)
{
if (cl->zrleData) {
zrleOutStreamFree(cl->zrleData);
}
cl->zrleData = NULL;
if (cl->zrleBeforeBuf) {
free(cl->zrleBeforeBuf);
}
cl->zrleBeforeBuf = NULL;
if (cl->paletteHelper) {
free(cl->paletteHelper);
}
cl->paletteHelper = NULL;
}
|
