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
|
/* Copyright (C) 1994-2003 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.
*
* $Header$
*/
// high level layer initialising
// the system supports:
// 1 optional background parallax layer
// 1 not optional normal backdrop layer
// 3 normal sorted layers
// up to 2 foreground parallax layers
#include "common/stdafx.h"
#include "sword2/sword2.h"
namespace Sword2 {
int32 Logic::fnInitBackground(int32 *params) {
// this screen defines the size of the back buffer
// params: 0 res id of normal background layer - cannot be 0
// 1 1 yes 0 no for a new palette
return _vm->initBackground(params[0], params[1]);
}
int32 Sword2Engine::initBackground(int32 res, int32 new_palette) {
MultiScreenHeader *screenLayerTable;
ScreenHeader *screen_head;
LayerHeader *layer;
SpriteInfo spriteInfo;
uint8 *file;
uint32 rv;
debug(5, "CHANGED TO LOCATION \"%s\"", fetchObjectName(res));
// stop all fx & clears the queue
clearFxQueue();
#ifdef _SWORD2_DEBUG
debug(5, "fnInitBackground(%d)", res);
if (!res) {
error("ERROR: fnInitBackground cannot have 0 for background layer id!");
}
#endif
// if the screen is still fading down then wait for black
_graphics->waitForFade();
// if last screen was using a shading mask (see below)
if (_thisScreen.mask_flag) {
rv = _graphics->closeLightMask();
if (rv)
error("Driver Error %.8x", rv);
}
// New stuff for faster screen drivers
// for drivers: close the previous screen if one is open
if (_thisScreen.background_layer_id)
_graphics->closeBackgroundLayer();
_thisScreen.background_layer_id = res;
_thisScreen.new_palette = new_palette;
// ok, now read the resource and pull out all the normal sort layer
// info/and set them up at the beginning of the sort list - why do it
// each cycle
// file points to 1st byte in the layer file
file = _resman->openResource(_thisScreen.background_layer_id);
screen_head = fetchScreenHeader(file);
//set number of special sort layers
_thisScreen.number_of_layers = screen_head->noLayers;
_thisScreen.screen_wide = screen_head->width;
_thisScreen.screen_deep = screen_head->height;
debug(5, "res test layers=%d width=%d depth=%d", screen_head->noLayers, screen_head->width, screen_head->height);
//initialise the driver back buffer
_graphics->setLocationMetrics(screen_head->width, screen_head->height);
if (screen_head->noLayers) {
for (int i = 0; i < screen_head->noLayers; i++) {
// get layer header for layer i
layer = fetchLayerHeader(file, i);
// add into the sort list
// need this for sorting - but leave the rest blank,
// we'll take from the header at print time
_sortList[i].sort_y = layer->y + layer->height;
// signifies a layer
_sortList[i].layer_number = i + 1;
debug(5, "init layer %d", i);
}
}
// using the screen size setup the scrolling variables
// if layer is larger than physical screen
if (screen_head->width > _graphics->_screenWide || screen_head->height > _graphics->_screenDeep) {
// switch on scrolling (2 means first time on screen)
_thisScreen.scroll_flag = 2;
// note, if we've already set the player up then we could do
// the initial scroll set here
// reset scroll offsets
_thisScreen.scroll_offset_x = 0;
_thisScreen.scroll_offset_y = 0;
// calc max allowed offsets (to prevent scrolling off edge) -
// MOVE TO NEW_SCREEN in GTM_CORE.C !!
// NB. min scroll offsets are both zero
_thisScreen.max_scroll_offset_x = screen_head->width - _graphics->_screenWide;
// 'screenDeep' includes the menu's, so take away 80 pixels
_thisScreen.max_scroll_offset_y = screen_head->height - (_graphics->_screenDeep - (RDMENU_MENUDEEP * 2));
} else {
// layer fits on physical screen - scrolling not required
_thisScreen.scroll_flag = 0; // switch off scrolling
_thisScreen.scroll_offset_x = 0; // reset scroll offsets
_thisScreen.scroll_offset_y = 0;
}
// no inter-cycle scroll between new screens (see setScrollTarget in
// build display)
_graphics->resetRenderEngine();
// these are the physical screen coords where the system
// will try to maintain George's actual feet coords
_thisScreen.feet_x = 320;
_thisScreen.feet_y = 340;
// shading mask
screenLayerTable = (MultiScreenHeader *) (file + sizeof(StandardHeader));
if (screenLayerTable->maskOffset) {
spriteInfo.x = 0;
spriteInfo.y = 0;
spriteInfo.w = screen_head->width;
spriteInfo.h = screen_head->height;
spriteInfo.scale = 0;
spriteInfo.scaledWidth = 0;
spriteInfo.scaledHeight = 0;
spriteInfo.type = 0;
spriteInfo.blend = 0;
spriteInfo.data = fetchShadingMask(file);
spriteInfo.colourTable = 0;
rv = _graphics->openLightMask(&spriteInfo);
if (rv)
error("Driver Error %.8x", rv);
// so we know to close it later! (see above)
_thisScreen.mask_flag = 1;
} else {
// no need to close a mask later
_thisScreen.mask_flag = 0;
}
// close the screen file
_resman->closeResource(_thisScreen.background_layer_id);
setUpBackgroundLayers();
debug(5, "end init");
return 1;
}
// called from fnInitBackground and also from control panel
void Sword2Engine::setUpBackgroundLayers(void) {
MultiScreenHeader *screenLayerTable;
ScreenHeader *screen_head;
uint8 *file;
int i;
// if we actually have a screen to initialise (in case not called from
// control panel)
if (_thisScreen.background_layer_id) {
// open resource & set pointers to headers
// file points to 1st byte in the layer file
file = _resman->openResource(_thisScreen.background_layer_id);
screen_head = fetchScreenHeader(file);
screenLayerTable = (MultiScreenHeader *) (file + sizeof(StandardHeader));
// Background parallax layers
for (i = 0; i < 2; i++) {
if (screenLayerTable->bg_parallax[i])
_graphics->initialiseBackgroundLayer(fetchBackgroundParallaxLayer(file, i));
else
_graphics->initialiseBackgroundLayer(NULL);
}
// Normal backround layer
_graphics->initialiseBackgroundLayer(fetchBackgroundLayer(file));
// Foreground parallax layers
for (i = 0; i < 2; i++) {
if (screenLayerTable->fg_parallax[i])
_graphics->initialiseBackgroundLayer(fetchForegroundParallaxLayer(file, i));
else
_graphics->initialiseBackgroundLayer(NULL);
}
// close the screen file
_resman->closeResource(_thisScreen.background_layer_id);
}
}
} // End of namespace Sword2
|
