mirror of
https://github.com/libretro/scummvm.git
synced 2025-01-15 06:18:33 +00:00
72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
/* ScummVM - Scumm Interpreter
|
|
* Copyright (C) 2002-2003 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 "codec1.h"
|
|
|
|
Codec1Decoder::~Codec1Decoder() {
|
|
}
|
|
|
|
bool Codec1Decoder::decode(byte *dst, const byte *src, int) {
|
|
byte val;
|
|
int32 size_line;
|
|
int32 code, length;
|
|
int32 h, height = getRect().height();
|
|
|
|
for(h = 0; h < height; h++) {
|
|
size_line = READ_LE_UINT16(src); // size of compressed line !
|
|
src += 2;
|
|
#ifdef DEBUG_CODEC1
|
|
debug(7, "codec1 : h == %d, size_line == %d", h, size_line);
|
|
#endif
|
|
while(size_line > 0) {
|
|
code = *src++;
|
|
size_line--;
|
|
length = (code >> 1) + 1;
|
|
#ifdef DEBUG_CODEC1
|
|
debug(7, "codec1 : length == %d", length);
|
|
#endif
|
|
if(code & 1) {
|
|
val = *src++;
|
|
size_line--;
|
|
if (val)
|
|
memset(dst, val, length);
|
|
dst += length;
|
|
#ifdef DEBUG_CODEC1
|
|
debug(7, "codec1 : blitting %d times %d", length, val);
|
|
#endif
|
|
} else {
|
|
size_line -= length;
|
|
#ifdef DEBUG_CODEC1
|
|
debug(7, "codec1 : blitting %d entries", length);
|
|
#endif
|
|
while(length--) {
|
|
val = *src++;
|
|
if (val)
|
|
*dst = val;
|
|
dst++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|