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
|
/*
* Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
/*
* hextile.c - handle hextile encoding.
*
* This file shouldn't be compiled directly. It is included multiple times by
* rfbproto.c, each time with a different definition of the macro BPP. For
* each value of BPP, this file defines a function which handles a hextile
* encoded rectangle with BPP bits per pixel.
*/
#define HandleHextileBPP CONCAT2E(HandleHextile,BPP)
#define CARDBPP CONCAT2E(CARD,BPP)
#define GET_PIXEL CONCAT2E(GET_PIXEL,BPP)
#define FillRectangleBPP CONCAT2E(FillRectangle,BPP)
static Bool
HandleHextileBPP (int rx, int ry, int rw, int rh)
{
CARDBPP bg, fg;
int i;
CARD8 *ptr;
int x, y, w, h;
int sx, sy, sw, sh;
CARD8 subencoding;
CARD8 nSubrects;
for (y = ry; y < ry+rh; y += 16) {
for (x = rx; x < rx+rw; x += 16) {
w = h = 16;
if (rx+rw - x < 16)
w = rx+rw - x;
if (ry+rh - y < 16)
h = ry+rh - y;
if (!ReadFromRFBServer((char *)&subencoding, 1))
return False;
if (subencoding & rfbHextileRaw) {
if (!ReadFromRFBServer(buffer, w * h * (BPP / 8)))
return False;
CopyDataToScreen(buffer, x, y, w, h);
continue;
}
if (subencoding & rfbHextileBackgroundSpecified)
if (!ReadFromRFBServer((char *)&bg, sizeof(bg)))
return False;
LockFramebuffer();
FillRectangleBPP(bg, x, y, w, h);
if (subencoding & rfbHextileForegroundSpecified)
if (!ReadFromRFBServer((char *)&fg, sizeof(fg))) {
UnlockFramebuffer();
return False;
}
if (!(subencoding & rfbHextileAnySubrects)) {
UnlockFramebuffer();
SyncScreenRegion(x, y, w, h);
continue;
}
if (!ReadFromRFBServer((char *)&nSubrects, 1)) {
UnlockFramebuffer();
return False;
}
ptr = (CARD8 *)buffer;
if (subencoding & rfbHextileSubrectsColoured) {
if (!ReadFromRFBServer(buffer, nSubrects * (2 + (BPP / 8)))) {
UnlockFramebuffer();
return False;
}
for (i = 0; i < nSubrects; i++) {
GET_PIXEL(fg, ptr);
sx = rfbHextileExtractX(*ptr);
sy = rfbHextileExtractY(*ptr);
ptr++;
sw = rfbHextileExtractW(*ptr);
sh = rfbHextileExtractH(*ptr);
ptr++;
FillRectangleBPP(fg, x+sx, y+sy, sw, sh);
}
} else {
if (!ReadFromRFBServer(buffer, nSubrects * 2)) {
UnlockFramebuffer();
return False;
}
for (i = 0; i < nSubrects; i++) {
sx = rfbHextileExtractX(*ptr);
sy = rfbHextileExtractY(*ptr);
ptr++;
sw = rfbHextileExtractW(*ptr);
sh = rfbHextileExtractH(*ptr);
ptr++;
FillRectangleBPP(fg, x+sx, y+sy, sw, sh);
}
}
UnlockFramebuffer();
SyncScreenRegion(x, y, w, h);
}
}
return True;
}
|
