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Location: cpp/openttd-patchpack/source/src/blitter/factory.hpp - annotation
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Update: Translations from eints
czech: 18 changes by vladoschreiner
german: 27 changes by Wuzzy2
czech: 18 changes by vladoschreiner
german: 27 changes by Wuzzy2
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* 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"
/**
* 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().empty()) return nullptr;
const char *bname = name.empty() ? default_blitter : name.c_str();
for (auto &it : GetBlitters()) {
BlitterFactory *b = it.second;
if (StrEqualsIgnoreCase(bname, b->name)) {
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 void GetBlittersInfo(std::back_insert_iterator<std::string> &output_iterator)
{
fmt::format_to(output_iterator, "List of blitters:\n");
for (auto &it : GetBlitters()) {
BlitterFactory *b = it.second;
fmt::format_to(output_iterator, "{:>18}: {}\n", b->name, b->GetDescription());
}
fmt::format_to(output_iterator, "\n");
}
/**
* 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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