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
|
/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file driver.cpp Base for all driver handling. */
#include "stdafx.h"
#include "debug.h"
#include "sound/sound_driver.hpp"
#include "music/music_driver.hpp"
#include "video/video_driver.hpp"
#include "string_func.h"
#include "safeguards.h"
VideoDriver *_video_driver; ///< The currently active video driver.
char *_ini_videodriver; ///< The video driver a stored in the configuration file.
int _num_resolutions; ///< The number of resolutions.
Dimension _resolutions[32]; ///< List of resolutions.
Dimension _cur_resolution; ///< The current resolution.
bool _rightclick_emulate; ///< Whether right clicking is emulated.
SoundDriver *_sound_driver; ///< The currently active sound driver.
char *_ini_sounddriver; ///< The sound driver a stored in the configuration file.
MusicDriver *_music_driver; ///< The currently active music driver.
char *_ini_musicdriver; ///< The music driver a stored in the configuration file.
char *_ini_blitter; ///< The blitter as stored in the configuration file.
bool _blitter_autodetected; ///< Was the blitter autodetected or specified by the user?
/**
* Get a string parameter the list of parameters.
* @param parm The parameters.
* @param name The parameter name we're looking for.
* @return The parameter value.
*/
const char *GetDriverParam(const char * const *parm, const char *name)
{
size_t len;
if (parm == NULL) return NULL;
len = strlen(name);
for (; *parm != NULL; parm++) {
const char *p = *parm;
if (strncmp(p, name, len) == 0) {
if (p[len] == '=') return p + len + 1;
if (p[len] == '\0') return p + len;
}
}
return NULL;
}
/**
* Get a boolean parameter the list of parameters.
* @param parm The parameters.
* @param name The parameter name we're looking for.
* @return The parameter value.
*/
bool GetDriverParamBool(const char * const *parm, const char *name)
{
return GetDriverParam(parm, name) != NULL;
}
/**
* Get an integer parameter the list of parameters.
* @param parm The parameters.
* @param name The parameter name we're looking for.
* @param def The default value if the parameter doesn't exist.
* @return The parameter value.
*/
int GetDriverParamInt(const char * const *parm, const char *name, int def)
{
const char *p = GetDriverParam(parm, name);
return p != NULL ? atoi(p) : def;
}
/**
* Find the requested driver and return its class.
* @param name the driver to select.
* @param type the type of driver to select
* @post Sets the driver so GetCurrentDriver() returns it too.
*/
Driver *DriverFactoryBase::SelectDriver(const char *name, Driver::Type type)
{
if (GetDrivers().size() == 0) return NULL;
if (StrEmpty(name)) {
/* Probe for this driver, but do not fall back to dedicated/null! */
for (int priority = 10; priority > 0; priority--) {
Drivers::iterator it = GetDrivers().begin();
for (; it != GetDrivers().end(); ++it) {
DriverFactoryBase *d = (*it).second;
/* Check driver type */
if (d->type != type) continue;
if (d->priority != priority) continue;
Driver *newd = d->CreateInstance();
const char *err = newd->Start(NULL);
if (err == NULL) {
DEBUG(driver, 1, "Successfully probed %s driver '%s'", GetDriverTypeName(type), d->name);
delete *GetActiveDriver(type);
*GetActiveDriver(type) = newd;
return newd;
}
DEBUG(driver, 1, "Probing %s driver '%s' failed with error: %s", GetDriverTypeName(type), d->name, err);
delete newd;
}
}
usererror("Couldn't find any suitable %s driver", GetDriverTypeName(type));
} else {
char *parm;
char buffer[256];
const char *parms[32];
/* Extract the driver name and put parameter list in parm */
strecpy(buffer, name, lastof(buffer));
parm = strchr(buffer, ':');
parms[0] = NULL;
if (parm != NULL) {
uint np = 0;
/* Tokenize the parm. */
do {
*parm++ = '\0';
if (np < lengthof(parms) - 1) parms[np++] = parm;
while (*parm != '\0' && *parm != ',') parm++;
} while (*parm == ',');
parms[np] = NULL;
}
/* Find this driver */
Drivers::iterator it = GetDrivers().begin();
for (; it != GetDrivers().end(); ++it) {
DriverFactoryBase *d = (*it).second;
/* Check driver type */
if (d->type != type) continue;
/* Check driver name */
if (strcasecmp(buffer, d->name) != 0) continue;
/* Found our driver, let's try it */
Driver *newd = d->CreateInstance();
const char *err = newd->Start(parms);
if (err != NULL) {
delete newd;
usererror("Unable to load driver '%s'. The error was: %s", d->name, err);
}
DEBUG(driver, 1, "Successfully loaded %s driver '%s'", GetDriverTypeName(type), d->name);
delete *GetActiveDriver(type);
*GetActiveDriver(type) = newd;
return newd;
}
usererror("No such %s driver: %s\n", GetDriverTypeName(type), buffer);
}
}
/**
* Build a human readable list of available drivers, grouped by type.
* @param p The buffer to write to.
* @param last The last element in the buffer.
* @return The end of the written buffer.
*/
char *DriverFactoryBase::GetDriversInfo(char *p, const char *last)
{
for (Driver::Type type = Driver::DT_BEGIN; type != Driver::DT_END; type++) {
p += seprintf(p, last, "List of %s drivers:\n", GetDriverTypeName(type));
for (int priority = 10; priority >= 0; priority--) {
Drivers::iterator it = GetDrivers().begin();
for (; it != GetDrivers().end(); it++) {
DriverFactoryBase *d = (*it).second;
if (d->type != type) continue;
if (d->priority != priority) continue;
p += seprintf(p, last, "%18s: %s\n", d->name, d->GetDescription());
}
}
p += seprintf(p, last, "\n");
}
return p;
}
/**
* Construct a new DriverFactory.
* @param type The type of driver.
* @param priority The priority within the driver class.
* @param name The name of the driver.
* @param description A long-ish description of the driver.
*/
DriverFactoryBase::DriverFactoryBase(Driver::Type type, int priority, const char *name, const char *description) :
type(type), priority(priority), name(name), description(description)
{
/* Prefix the name with driver type to make it unique */
char buf[32];
strecpy(buf, GetDriverTypeName(type), lastof(buf));
strecpy(buf + 5, name, lastof(buf));
const char *longname = strdup(buf);
std::pair<Drivers::iterator, bool> P = GetDrivers().insert(Drivers::value_type(longname, this));
assert(P.second);
}
/**
* Frees memory used for this->name
*/
DriverFactoryBase::~DriverFactoryBase()
{
/* Prefix the name with driver type to make it unique */
char buf[32];
strecpy(buf, GetDriverTypeName(type), lastof(buf));
strecpy(buf + 5, this->name, lastof(buf));
Drivers::iterator it = GetDrivers().find(buf);
assert(it != GetDrivers().end());
const char *longname = (*it).first;
GetDrivers().erase(it);
free(longname);
if (GetDrivers().empty()) delete &GetDrivers();
}
|
