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
|
/*
* 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 factory.hpp Factory to 'query' all available blitters. */
#ifndef BLITTER_FACTORY_HPP
#define BLITTER_FACTORY_HPP
#include "base.hpp"
#include "../debug.h"
#include "../string_func.h"
#include "../core/string_compare_type.hpp"
#include <map>
/**
* The base factory, keeping track of all blitters.
*/
class BlitterFactory {
private:
const std::string name; ///< The name of the blitter factory.
const std::string description; ///< The description of the blitter.
typedef std::map<std::string, BlitterFactory *> Blitters; ///< Map of blitter factories.
/**
* Get the map with currently known blitters.
* @return The known blitters.
*/
static Blitters &GetBlitters()
{
static Blitters &s_blitters = *new Blitters();
return s_blitters;
}
/**
* Get the currently active blitter.
* @return The currently active blitter.
*/
static Blitter **GetActiveBlitter()
{
static Blitter *s_blitter = nullptr;
return &s_blitter;
}
protected:
/**
* Construct the blitter, and register it.
* @param name The name of the blitter.
* @param description A longer description for the blitter.
* @param usable Whether the blitter is usable (on the current computer). For example for disabling SSE blitters when the CPU can't handle them.
* @pre name != nullptr.
* @pre description != nullptr.
* @pre There is no blitter registered with this name.
*/
BlitterFactory(const char *name, const char *description, bool usable = true) :
name(name), description(description)
{
if (usable) {
Blitters &blitters = GetBlitters();
assert(blitters.find(this->name) == blitters.end());
/*
* Only add when the blitter is usable. Do not bail out or
* do more special things since the blitters are always
* instantiated upon start anyhow and freed upon shutdown.
*/
blitters.insert(Blitters::value_type(this->name, this));
} else {
DEBUG(driver, 1, "Not registering blitter %s as it is not usable", name);
}
}
/**
* Is the blitter usable with the current drivers and hardware config?
* @return True if the blitter can be instantiated.
*/
virtual bool IsUsable() const
{
return true;
}
public:
virtual ~BlitterFactory()
{
GetBlitters().erase(this->name);
if (GetBlitters().empty()) delete &GetBlitters();
}
/**
* Find the requested blitter and return his class.
* @param name the blitter to select.
* @post Sets the blitter so GetCurrentBlitter() returns it too.
*/
static Blitter *SelectBlitter(const std::string &name)
{
BlitterFactory *b = GetBlitterFactory(name);
if (b == nullptr) return nullptr;
Blitter *newb = b->CreateInstance();
delete *GetActiveBlitter();
*GetActiveBlitter() = newb;
DEBUG(driver, 1, "Successfully %s blitter '%s'", name.empty() ? "probed" : "loaded", newb->GetName());
return newb;
}
/**
* Get the blitter factory with the given name.
* @param name the blitter factory to select.
* @return The blitter factory, or nullptr when there isn't one with the wanted name.
*/
static BlitterFactory *GetBlitterFactory(const std::string &name)
{
#if defined(DEDICATED)
const char *default_blitter = "null";
#elif defined(WITH_COCOA)
const char *default_blitter = "32bpp-anim";
#else
const char *default_blitter = "8bpp-optimized";
#endif
if (GetBlitters().size() == 0) return nullptr;
const char *bname = name.empty() ? default_blitter : name.c_str();
Blitters::iterator it = GetBlitters().begin();
for (; it != GetBlitters().end(); it++) {
BlitterFactory *b = (*it).second;
if (strcasecmp(bname, b->name.c_str()) == 0) {
return b->IsUsable() ? b : nullptr;
}
}
return nullptr;
}
/**
* Get the current active blitter (always set by calling SelectBlitter).
*/
static Blitter *GetCurrentBlitter()
{
return *GetActiveBlitter();
}
/**
* Fill a buffer with information about the blitters.
* @param p The buffer to fill.
* @param last The last element of the buffer.
* @return p The location till where we filled the buffer.
*/
static char *GetBlittersInfo(char *p, const char *last)
{
p += seprintf(p, last, "List of blitters:\n");
Blitters::iterator it = GetBlitters().begin();
for (; it != GetBlitters().end(); it++) {
BlitterFactory *b = (*it).second;
p += seprintf(p, last, "%18s: %s\n", b->name.c_str(), b->GetDescription().c_str());
}
p += seprintf(p, last, "\n");
return p;
}
/**
* Get the long, human readable, name for the Blitter-class.
*/
const std::string &GetName() const
{
return this->name;
}
/**
* Get a nice description of the blitter-class.
*/
const std::string &GetDescription() const
{
return this->description;
}
/**
* Create an instance of this Blitter-class.
*/
virtual Blitter *CreateInstance() = 0;
};
extern std::string _ini_blitter;
extern bool _blitter_autodetected;
#endif /* BLITTER_FACTORY_HPP */
|
