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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "common/rect.h"
#include "m4/globals.h"
#include "m4/graphics.h"
#include "m4/m4.h"
#include "m4/resource.h"
#include "m4/sprite.h"
namespace M4 {
enum {
kEndOfLine = 0,
kEndOfSprite = 1,
kMarker = 2
};
M4Sprite::M4Sprite(Common::SeekableReadStream* source, int xOfs, int yOfs, int widthVal, int heightVal, bool decodeRle, uint8 encodingVal)
: M4Surface(widthVal, heightVal), encoding(encodingVal) {
if (_vm->isM4()) {
if (decodeRle) {
loadRle(source);
} else {
// Raw sprite data, load directly
byte *dst = getBasePtr();
source->read(dst, widthVal * heightVal);
}
} else {
loadMadsSprite(source);
}
x = xOffset = xOfs;
y = yOffset = yOfs;
}
void M4Sprite::loadRle(Common::SeekableReadStream* rleData) {
byte *dst = getBasePtr();
while (1) {
byte len = rleData->readByte();
if (len == 0) {
len = rleData->readByte();
if (len <= kMarker) {
if (len == kEndOfSprite)
break;
} else {
while (len--) {
*dst++ = rleData->readByte();
}
}
} else {
byte value = rleData->readByte();
while (len--)
*dst++ = value;
}
}
}
void M4Sprite::loadDeltaRle(Common::SeekableReadStream* rleData, int destX, int destY) {
int lineNum = 0;
byte *dst = getBasePtr(destX, destY);
while (1) {
byte len = rleData->readByte();
if (len == 0) {
len = rleData->readByte();
if (len <= kMarker) {
if (len == kEndOfLine) {
dst = getBasePtr(destX, destY + lineNum);
lineNum++;
} else if (len == kEndOfSprite)
break;
} else {
while (len--) {
byte pixel = rleData->readByte();
if (pixel == 0)
dst++;
else
*dst++ = pixel;
/* NOTE: The change below behaved differently than the old code,
so I put the old code back in again above.
If the pixel value is 0, nothing should be written to the
output buffer, since 0 means transparent. */
//*dst++ = (pixel == 0xFD) ? 0 : pixel;
}
}
} else {
byte value = rleData->readByte();
if (value == 0)
dst += len;
else
while (len--)
*dst++ = value;
}
}
}
// TODO: The sprite outlines (pixel value 0xFD) are not shown
void M4Sprite::loadMadsSprite(Common::SeekableReadStream* source) {
byte *outp, *lineStart;
bool newLine = false;
outp = getBasePtr();
lineStart = getBasePtr();
while (1) {
byte cmd1, cmd2, count, pixel;
if (newLine) {
outp = lineStart + w;
lineStart = outp;
newLine = false;
}
cmd1 = source->readByte();
if (cmd1 == 0xFC)
break;
else if (cmd1 == 0xFF)
newLine = true;
else if (cmd1 == 0xFD) {
while (!newLine) {
count = source->readByte();
if (count == 0xFF) {
newLine = true;
} else {
pixel = source->readByte();
while (count--)
*outp++ = (pixel == 0xFD) ? 0 : pixel;
}
}
} else {
while (!newLine) {
cmd2 = source->readByte();
if (cmd2 == 0xFF) {
newLine = true;
} else if (cmd2 == 0xFE) {
count = source->readByte();
pixel = source->readByte();
while (count--)
*outp++ = (pixel == 0xFD) ? 0 : pixel;
} else {
*outp++ = (cmd2 == 0xFD) ? 0 : cmd2;
}
}
}
}
}
byte M4Sprite::getTransparentColor() const {
// FIXME: We assume that the transparent color is the color of the
// top left pixel.
return *getBasePtr(0, 0);
}
} // End of namespace M4
|
