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Location: cpp/openttd-patchpack/source/src/blitter/factory.hpp
r26913:e7b3d514fe34
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Revert 92c7551: Line drawing algorithm fix broke other cases (#10497)
This reverts commit 92c755161d6a467d33477bd0041fc720d7d9ba41.
This reverts commit 92c755161d6a467d33477bd0041fc720d7d9ba41.
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 {} 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 its 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 {} blitter '{}'", 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 */
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