1 /*
2 * Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
3 *
4 * This is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This software is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this software; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
17 * USA.
18 */
19
20 /*
21 * hextile.c - handle hextile encoding.
22 *
23 * This file shouldn't be compiled directly. It is included multiple times by
24 * rfbproto.c, each time with a different definition of the macro BPP. For
25 * each value of BPP, this file defines a function which handles a hextile
26 * encoded rectangle with BPP bits per pixel.
27 */
28
29 #define HandleHextileBPP CONCAT2E(HandleHextile,BPP)
30 #define CARDBPP CONCAT3E(uint,BPP,_t)
31
32 static rfbBool
HandleHextileBPP(rfbClient * client,int rx,int ry,int rw,int rh)33 HandleHextileBPP (rfbClient* client, int rx, int ry, int rw, int rh)
34 {
35 CARDBPP bg, fg;
36 int i;
37 uint8_t *ptr;
38 int x, y, w, h;
39 int sx, sy, sw, sh;
40 uint8_t subencoding;
41 uint8_t nSubrects;
42
43 for (y = ry; y < ry+rh; y += 16) {
44 for (x = rx; x < rx+rw; x += 16) {
45 w = h = 16;
46 if (rx+rw - x < 16)
47 w = rx+rw - x;
48 if (ry+rh - y < 16)
49 h = ry+rh - y;
50
51 if (!ReadFromRFBServer(client, (char *)&subencoding, 1))
52 return FALSE;
53
54 if (subencoding & rfbHextileRaw) {
55 if (!ReadFromRFBServer(client, client->buffer, w * h * (BPP / 8)))
56 return FALSE;
57
58 CopyRectangle(client, (uint8_t *)client->buffer, x, y, w, h);
59
60 continue;
61 }
62
63 if (subencoding & rfbHextileBackgroundSpecified)
64 if (!ReadFromRFBServer(client, (char *)&bg, sizeof(bg)))
65 return FALSE;
66
67 FillRectangle(client, x, y, w, h, bg);
68
69 if (subencoding & rfbHextileForegroundSpecified)
70 if (!ReadFromRFBServer(client, (char *)&fg, sizeof(fg)))
71 return FALSE;
72
73 if (!(subencoding & rfbHextileAnySubrects)) {
74 continue;
75 }
76
77 if (!ReadFromRFBServer(client, (char *)&nSubrects, 1))
78 return FALSE;
79
80 ptr = (uint8_t*)client->buffer;
81
82 if (subencoding & rfbHextileSubrectsColoured) {
83 if (!ReadFromRFBServer(client, client->buffer, nSubrects * (2 + (BPP / 8))))
84 return FALSE;
85
86 for (i = 0; i < nSubrects; i++) {
87 #if BPP==8
88 GET_PIXEL8(fg, ptr);
89 #elif BPP==16
90 GET_PIXEL16(fg, ptr);
91 #elif BPP==32
92 GET_PIXEL32(fg, ptr);
93 #else
94 #error "Invalid BPP"
95 #endif
96 sx = rfbHextileExtractX(*ptr);
97 sy = rfbHextileExtractY(*ptr);
98 ptr++;
99 sw = rfbHextileExtractW(*ptr);
100 sh = rfbHextileExtractH(*ptr);
101 ptr++;
102
103 FillRectangle(client, x+sx, y+sy, sw, sh, fg);
104 }
105
106 } else {
107 if (!ReadFromRFBServer(client, client->buffer, nSubrects * 2))
108 return FALSE;
109
110 for (i = 0; i < nSubrects; i++) {
111 sx = rfbHextileExtractX(*ptr);
112 sy = rfbHextileExtractY(*ptr);
113 ptr++;
114 sw = rfbHextileExtractW(*ptr);
115 sh = rfbHextileExtractH(*ptr);
116 ptr++;
117
118 FillRectangle(client, x+sx, y+sy, sw, sh, fg);
119 }
120 }
121 }
122 }
123
124 return TRUE;
125 }
126
127 #undef CARDBPP
128