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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/* 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.
*
*/
#include "bladerunner/zbuffer.h"
#include "bladerunner/decompress_lzo.h"
namespace BladeRunner {
void ZBufferDirtyRects::reset() {
_count = 0;
}
bool ZBufferDirtyRects::add(Common::Rect rect) {
if (_count == MAX_DIRTY_RECTS)
return false;
_rects[_count++] = rect;
if (_count > 1) {
extendExisting();
}
return true;
}
void ZBufferDirtyRects::extendExisting() {
if (_count < 2)
return;
Common::Rect last = _rects[_count - 1];
int i;
for (i = 0; i != _count - 1; ++i) {
if (last.intersects(_rects[i])) {
_rects[i].extend(last);
_count--;
break;
}
}
}
int ZBufferDirtyRects::getCount() {
return _count;
}
bool ZBufferDirtyRects::popRect(Common::Rect *rect) {
if (_count == 0)
return false;
*rect = _rects[--_count];
return true;
}
ZBuffer::ZBuffer() {
reset();
}
ZBuffer::~ZBuffer() {
delete[] _zbuf1;
delete[] _zbuf2;
}
void ZBuffer::init(int width, int height) {
_width = width;
_height = height;
_zbuf1 = new uint16[width * height];
_zbuf2 = new uint16[width * height];
_dirtyRects = new ZBufferDirtyRects();
}
static int decodePartialZBuffer(const uint8 *src, uint16 *curZBUF, uint32 srcLen) {
uint32 dstSize = 640 * 480; // This is taken from global variables?
uint32 dstRemain = dstSize;
uint16 *curzp = curZBUF;
uint16 *inp = (uint16*)src;
while (dstRemain && (inp - (uint16*)src) < (std::ptrdiff_t)srcLen) {
uint32 count = FROM_LE_16(*inp++);
if (count & 0x8000) {
count = MIN(count & 0x7fff, dstRemain);
dstRemain -= count;
while (count--) {
uint16 value = FROM_LE_16(*inp++);
if (value)
*curzp = value;
++curzp;
}
} else {
count = MIN(count, dstRemain);
dstRemain -= count;
uint16 value = FROM_LE_16(*inp++);
if (!value) {
curzp += count;
} else {
while (count--)
*curzp++ = value;
}
}
}
return dstSize - dstRemain;
}
bool ZBuffer::decodeData(const uint8 *data, int size) {
if (_disabled) {
return false;
}
uint32 width, height, complete, unk0;
width = READ_LE_UINT32(data + 0);
height = READ_LE_UINT32(data + 4);
complete = READ_LE_UINT32(data + 8);
unk0 = READ_LE_UINT32(data + 12);
if (width != (uint32)_width || height != (uint32)_height) {
warning("zbuffer size mismatch (%d, %d) != (%d, %d)", _width, _height, width, height);
return false;
}
data += 16;
size -= 16;
if (complete) {
resetUpdates();
size_t zbufOutSize;
decompress_lzo1x(data, size, (uint8*)_zbuf1, &zbufOutSize);
memcpy(_zbuf2, _zbuf1, 2 * _width * _height);
} else {
clean();
decodePartialZBuffer(data, _zbuf1, size);
decodePartialZBuffer(data, _zbuf2, size);
}
return true;
}
uint16 *ZBuffer::getData() {
return _zbuf2;
}
uint16 ZBuffer::getZValue(int x, int y) {
assert(x >= 0 && x < _width);
assert(y >= 0 && y < _height);
if (!_zbuf2)
return 0;
return _zbuf2[y * _width + x];
}
void ZBuffer::reset() {
_zbuf1 = nullptr;
_zbuf2 = nullptr;
_dirtyRects = nullptr;
_width = 0;
_height = 0;
enable();
}
void ZBuffer::blit(Common::Rect rect) {
int line_width = rect.width();
for (int y = rect.top; y != rect.bottom; ++y) {
int offset = y * _width + rect.left;
memcpy(_zbuf2 + offset, _zbuf1 + offset, 2 * line_width);
}
}
void ZBuffer::mark(Common::Rect rect) {
assert(rect.isValidRect());
// debug("mark %d, %d, %d, %d", rect.top, rect.right, rect.bottom, rect.left);
rect.clip(_width, _height);
_dirtyRects->add(rect);
}
void ZBuffer::clean() {
Common::Rect rect;
while (_dirtyRects->popRect(&rect)) {
// debug("blit %d, %d, %d, %d", rect.top, rect.right, rect.bottom, rect.left);
blit(rect);
}
}
void ZBuffer::resetUpdates() {
_dirtyRects->reset();
}
void ZBuffer::disable() {
_disabled = true;
}
void ZBuffer::enable() {
_disabled = false;
}
} // End of namespace BladeRunner
|