summaryrefslogtreecommitdiffstats
path: root/libvncclient/hextile.c
blob: 14128ffd7840eff32f9db00cef600c404e14fdc1 (plain)
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
/*
 *  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
 *  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 CONCAT3E(uint,BPP,_t)
#define GET_PIXEL CONCAT2E(GET_PIXEL,BPP)

static rfbBool
HandleHextileBPP (rfbClient* client, int rx, int ry, int rw, int rh)
{
  CARDBPP bg, fg;
  int i;
  uint8_t *ptr;
  int x, y, w, h;
  int sx, sy, sw, sh;
  uint8_t subencoding;
  uint8_t 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(client, (char *)&subencoding, 1))
	return FALSE;

      if (subencoding & rfbHextileRaw) {
	if (!ReadFromRFBServer(client, client->buffer, w * h * (BPP / 8)))
	  return FALSE;

	CopyRectangle(client, client->buffer, x, y, w, h);

	continue;
      }

      if (subencoding & rfbHextileBackgroundSpecified)
	if (!ReadFromRFBServer(client, (char *)&bg, sizeof(bg)))
	  return FALSE;

      FillRectangle(client, x, y, w, h, fg);

      if (subencoding & rfbHextileForegroundSpecified)
	if (!ReadFromRFBServer(client, (char *)&fg, sizeof(fg)))
	  return FALSE;

      if (!(subencoding & rfbHextileAnySubrects)) {
	continue;
      }

      if (!ReadFromRFBServer(client, (char *)&nSubrects, 1))
	return FALSE;

      ptr = (uint8_t*)client->buffer;

      if (subencoding & rfbHextileSubrectsColoured) {
	if (!ReadFromRFBServer(client, client->buffer, nSubrects * (2 + (BPP / 8))))
	  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++;

	  FillRectangle(client, x+sx, y+sy, sw, sh, fg);
	}

      } else {
	if (!ReadFromRFBServer(client, client->buffer, nSubrects * 2))
	  return FALSE;

	for (i = 0; i < nSubrects; i++) {
	  sx = rfbHextileExtractX(*ptr);
	  sy = rfbHextileExtractY(*ptr);
	  ptr++;
	  sw = rfbHextileExtractW(*ptr);
	  sh = rfbHextileExtractH(*ptr);
	  ptr++;

	  FillRectangle(client, x+sx, y+sy, sw, sh, fg);
	}
      }
    }
  }

  return TRUE;
}

#undef CARDBPP