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
|
/* Copyright (C) 1994-2004 Revolution Software Ltd
*
* 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 "common/stdafx.h"
#include "sword2/sword2.h"
#include "sword2/driver/d_draw.h"
namespace Sword2 {
uint8 Graphics::getMatch(uint8 r, uint8 g, uint8 b) {
int32 diff;
int32 min;
int16 diffred, diffgreen, diffblue;
int16 i;
uint8 minIndex;
diffred = _palCopy[0][0] - r;
diffgreen = _palCopy[0][1] - g;
diffblue = _palCopy[0][2] - b;
diff = diffred * diffred + diffgreen * diffgreen + diffblue * diffblue;
min = diff;
minIndex = 0;
if (diff > 0) {
for (i = 1; i < 256; i++) {
diffred = _palCopy[i][0] - r;
diffgreen = _palCopy[i][1] - g;
diffblue = _palCopy[i][2] - b;
diff = diffred * diffred + diffgreen * diffgreen + diffblue * diffblue;
if (diff < min) {
min = diff;
minIndex = (uint8) i;
if (min == 0)
break;
}
}
}
// Here, minIndex is the index of the matchpalette which is closest.
return minIndex;
}
/**
* Sets or creates a table of palette indices which will be searched later for
* a quick palette match.
* @param data either the palette match table, or NULL to create a new table
* from the current palCopy
*/
void Graphics::updatePaletteMatchTable(byte *data) {
if (!data) {
int16 red, green, blue;
byte *p;
// Create palette match table
// FIXME: Does this case ever happen?
p = &_paletteMatch[0];
for (red = 0; red < 256; red += 4) {
for (green = 0; green < 256; green += 4) {
for (blue = 0; blue < 256; blue += 4) {
*p++ = getMatch((uint8) red, (uint8) green, (uint8) blue);
}
}
}
} else {
// The provided data is the new palette match table
memcpy(_paletteMatch, data, PALTABLESIZE);
}
}
/**
* Matches a colour triplet to a palette index.
* @param r red colour component
* @param g green colour component
* @param b blue colour component
* @return the palette index of the closest matching colour in the palette
*/
// FIXME: This used to be inlined - probably a good idea - but the
// linker complained when I tried to use it in sprite.cpp.
uint8 Graphics::quickMatch(uint8 r, uint8 g, uint8 b) {
return _paletteMatch[((int32) (r >> 2) << 12) + ((int32) (g >> 2) << 6) + (b >> 2)];
}
/**
* Sets the palette.
* @param startEntry the first colour entry to set
* @param noEntries the number of colour entries to set
* @param colourTable the new colour entries
*/
void Graphics::setPalette(int16 startEntry, int16 noEntries, byte *colourTable, uint8 fadeNow) {
if (noEntries) {
memcpy(&_palCopy[startEntry][0], colourTable, noEntries * 4);
if (fadeNow == RDPAL_INSTANT) {
_vm->_system->setPalette((const byte *) _palCopy, startEntry, noEntries);
setNeedFullRedraw();
}
} else {
_vm->_system->setPalette((const byte *) _palCopy, 0, 256);
setNeedFullRedraw();
}
}
void Graphics::dimPalette(void) {
byte *p = (byte *) _palCopy;
for (int i = 0; i < 256 * 4; i++)
p[i] /= 2;
_vm->_system->setPalette(p, 0, 256);
setNeedFullRedraw();
}
/**
* Fades the palette up from black to the current palette.
* @param time the time it will take the palette to fade up
*/
int32 Graphics::fadeUp(float time) {
if (getFadeStatus() != RDFADE_BLACK && getFadeStatus() != RDFADE_NONE)
return RDERR_FADEINCOMPLETE;
_fadeTotalTime = (int32) (time * 1000);
_fadeStatus = RDFADE_UP;
_fadeStartTime = _vm->_system->get_msecs();
return RD_OK;
}
/**
* Fades the palette down to black from the current palette.
* @param time the time it will take the palette to fade down
*/
int32 Graphics::fadeDown(float time) {
if (getFadeStatus() != RDFADE_BLACK && getFadeStatus() != RDFADE_NONE)
return RDERR_FADEINCOMPLETE;
_fadeTotalTime = (int32) (time * 1000);
_fadeStatus = RDFADE_DOWN;
_fadeStartTime = _vm->_system->get_msecs();
return RD_OK;
}
/**
* Get the current fade status
* @return RDFADE_UP (fading up), RDFADE_DOWN (fading down), RDFADE_NONE
* (not faded), or RDFADE_BLACK (completely faded down)
*/
uint8 Graphics::getFadeStatus(void) {
return _fadeStatus;
}
void Graphics::waitForFade(void) {
while (getFadeStatus() != RDFADE_NONE && getFadeStatus() != RDFADE_BLACK) {
updateDisplay();
_vm->_system->delay_msecs(20);
}
}
void Graphics::fadeServer(void) {
static int32 previousTime = 0;
const byte *newPalette = (const byte *) _fadePalette;
int32 currentTime;
int16 fadeMultiplier;
int16 i;
// This used to be called through a timer, but is now called from
// ServiceWindows() instead, since that's the only place where we
// actually update the screen.
// If we're not in the process of fading, do nothing.
if (getFadeStatus() != RDFADE_UP && getFadeStatus() != RDFADE_DOWN)
return;
// I don't know if this is necessary, but let's limit how often the
// palette is updated, just to be safe.
currentTime = _vm->_system->get_msecs();
if (currentTime - previousTime <= 25)
return;
previousTime = currentTime;
if (getFadeStatus() == RDFADE_UP) {
if (currentTime >= _fadeStartTime + _fadeTotalTime) {
_fadeStatus = RDFADE_NONE;
newPalette = (const byte *) _palCopy;
} else {
fadeMultiplier = (int16) (((int32) (currentTime - _fadeStartTime) * 256) / _fadeTotalTime);
for (i = 0; i < 256; i++) {
_fadePalette[i][0] = (_palCopy[i][0] * fadeMultiplier) >> 8;
_fadePalette[i][1] = (_palCopy[i][1] * fadeMultiplier) >> 8;
_fadePalette[i][2] = (_palCopy[i][2] * fadeMultiplier) >> 8;
}
}
} else {
if (currentTime >= _fadeStartTime + _fadeTotalTime) {
_fadeStatus = RDFADE_BLACK;
memset(_fadePalette, 0, sizeof(_fadePalette));
} else {
fadeMultiplier = (int16) (((int32) (_fadeTotalTime - (currentTime - _fadeStartTime)) * 256) / _fadeTotalTime);
for (i = 0; i < 256; i++) {
_fadePalette[i][0] = (_palCopy[i][0] * fadeMultiplier) >> 8;
_fadePalette[i][1] = (_palCopy[i][1] * fadeMultiplier) >> 8;
_fadePalette[i][2] = (_palCopy[i][2] * fadeMultiplier) >> 8;
}
}
}
_vm->_system->setPalette(newPalette, 0, 256);
setNeedFullRedraw();
}
} // End of namespace Sword2
|
