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
|
/* ScummVM - Scumm Interpreter
* Copyright (C) 2001/2002 The ScummVM project
*
* This program 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 program 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 program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include <stdafx.h>
#include "codec44.h"
#include "chunk.h"
#include "blitter.h"
bool Codec44Decoder::decode(Blitter & dst, Chunk & src) {
int32 size_line;
int32 num;
int32 w, width = getRect().width() + 1;
int32 h, height = getRect().height() + 1;
bool zero;
#ifdef DEBUG_CODEC44
debug(7, "codec44 : %dx%d", width, height);
#endif
for(h = 0; h < height - 1; h++) {
w = width;
size_line = src.getWord(); // size of compressed line !
#ifdef DEBUG_CODEC44
debug(7, "codec44 : h == %d, size_line == %d", h, size_line);
#endif
zero = true;
while(size_line > 1) {
num = src.getWord();
size_line -= 2;
if(zero) {
#ifdef DEBUG_CODEC44
debug(7, "codec44 : zeroing %d, entries", num);
#endif
if(w == num)
num--;
w -= num;
if(num)
dst.put(0, num);
} else {
num += 1;
#ifdef DEBUG_CODEC44
debug(7, "codec44 : blitting %d, entries", num);
#endif
if(w == num)
num--;
w -= num;
dst.blit(src, num);
size_line -= num;
}
zero = !zero;
}
}
return true;
}
|
