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
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/* 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 "common/system.h"
#include "graphics/palette.h"
#include "xeen/screen.h"
#include "xeen/resources.h"
#include "xeen/xeen.h"
namespace Xeen {
/**
* Constructor
*/
Screen::Screen(XeenEngine *vm) : _vm(vm) {
_fadeIn = false;
create(SCREEN_WIDTH, SCREEN_HEIGHT);
}
void Screen::update() {
// Merge the dirty rects
mergeDirtyRects();
// Loop through copying dirty areas to the physical screen
Common::List<Common::Rect>::iterator i;
for (i = _dirtyRects.begin(); i != _dirtyRects.end(); ++i) {
const Common::Rect &r = *i;
const byte *srcP = (const byte *)getBasePtr(r.left, r.top);
g_system->copyRectToScreen(srcP, this->pitch, r.left, r.top,
r.width(), r.height());
}
// Signal the physical screen to update
g_system->updateScreen();
_dirtyRects.clear();
}
void Screen::addDirtyRect(const Common::Rect &r) {
_dirtyRects.push_back(r);
}
void Screen::mergeDirtyRects() {
Common::List<Common::Rect>::iterator rOuter, rInner;
// Ensure dirty rect list has at least two entries
rOuter = _dirtyRects.begin();
for (int i = 0; i < 2; ++i, ++rOuter) {
if (rOuter == _dirtyRects.end())
return;
}
// Process the dirty rect list to find any rects to merge
for (rOuter = _dirtyRects.begin(); rOuter != _dirtyRects.end(); ++rOuter) {
rInner = rOuter;
while (++rInner != _dirtyRects.end()) {
if ((*rOuter).intersects(*rInner)) {
// these two rectangles overlap or
// are next to each other - merge them
unionRectangle(*rOuter, *rOuter, *rInner);
// remove the inner rect from the list
_dirtyRects.erase(rInner);
// move back to beginning of list
rInner = rOuter;
}
}
}
}
bool Screen::unionRectangle(Common::Rect &destRect, const Common::Rect &src1, const Common::Rect &src2) {
destRect = src1;
destRect.extend(src2);
return !destRect.isEmpty();
}
/**
* Load a palette resource into the temporary palette
*/
void Screen::loadPalette(const Common::String &name) {
File f(name);
for (int i = 0; i < PALETTE_SIZE; ++i)
_tempPaltte[i] = f.readByte() << 2;
}
/**
* Load a background resource into memory
*/
void Screen::loadBackground(const Common::String &name) {
File f(name);
assert(f.size() == (SCREEN_WIDTH * SCREEN_HEIGHT));
f.read((byte *)getPixels(), SCREEN_WIDTH * SCREEN_HEIGHT);
}
/**
* Copy a loaded background into a display page
*/
void Screen::loadPage(int pageNum) {
assert(pageNum == 0 || pageNum == 1);
if (_pages[0].empty()) {
_pages[0].create(SCREEN_WIDTH, SCREEN_HEIGHT);
_pages[1].create(SCREEN_WIDTH, SCREEN_HEIGHT);
}
blitTo(_pages[pageNum]);
}
void Screen::freePages() {
_pages[0].free();
_pages[1].free();
}
/**
* Merge the two pages along a horizontal split point
*/
void Screen::horizMerge(int xp) {
if (_pages[0].empty())
return;
for (int y = 0; y < SCREEN_HEIGHT; ++y) {
byte *destP = (byte *)getBasePtr(0, y);
const byte *srcP = (const byte *)_pages[0].getBasePtr(0, y);
Common::copy(srcP, srcP + SCREEN_WIDTH - xp, destP);
if (xp != 0) {
srcP = (const byte *)_pages[1].getBasePtr(0, y);
Common::copy(srcP + SCREEN_WIDTH - xp, srcP + SCREEN_WIDTH, destP + SCREEN_WIDTH - xp);
}
}
}
/**
* Merge the two pages along a vertical split point
*/
void Screen::vertMerge(int yp) {
if (_pages[0].empty())
return;
for (int y = 0; y < SCREEN_HEIGHT - yp; ++y) {
const byte *srcP = (const byte *)_pages[0].getBasePtr(0, y);
byte *destP = (byte *)getBasePtr(0, y);
Common::copy(srcP, srcP + SCREEN_WIDTH, destP);
}
for (int y = SCREEN_HEIGHT - yp; y < SCREEN_HEIGHT; ++y) {
const byte *srcP = (const byte *)_pages[1].getBasePtr(0, y);
byte *destP = (byte *)getBasePtr(0, y);
Common::copy(srcP, srcP + SCREEN_WIDTH, destP);
}
}
void Screen::draw(void *data) {
// TODO: Figure out data structure that can be passed to method
assert(!data);
drawScreen();
}
/**
* Mark the entire screen for drawing
*/
void Screen::drawScreen() {
addDirtyRect(Common::Rect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT));
}
void Screen::fade(int step) {
_fadeIn = true;
fadeInner(step);
}
void Screen::fadeOut(int step) {
_fadeIn = false;
fadeInner(step);
}
void Screen::fadeInner(int step) {
for (int idx = 128; idx >= 0 && !_vm->shouldQuit(); idx -= step) {
int val = MAX(idx, 0);
bool flag = !_fadeIn;
if (!flag) {
val = -(val - 128);
flag = step != 0x81;
}
if (!flag) {
step = 0x80;
} else {
// Create a scaled palette from the temporary one
for (int i = 0; i < PALETTE_SIZE; ++i) {
_mainPalette[i] = (_tempPaltte[i] * val * 2) >> 8;
}
updatePalette();
}
_vm->_events->pollEventsAndWait();
}
}
void Screen::updatePalette() {
updatePalette(_mainPalette, 0, 16);
}
void Screen::updatePalette(const byte *pal, int start, int count16) {
g_system->getPaletteManager()->setPalette(pal, start, count16 * 16);
}
void Screen::saveScreen(int slot) {
assert(slot > 0 && slot < 10);
_savedScreens[slot - 1].copyFrom(*this);
}
void Screen::restoreScreen(int slot) {
assert(slot > 0 && slot < 10);
_savedScreens[slot - 1].blitTo(*this);
_savedScreens[slot - 1].free();
}
} // End of namespace Xeen
|