Files
@ r20257:27d3d45ea399
Branch filter:
Location: cpp/openttd-patchpack/source/src/driver.h
r20257:27d3d45ea399
3.6 KiB
text/x-c
(svn r25264) -Feature: linkgraph overlay over main viewport (fonsinchen)
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 | /* $Id$ */
/*
* 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.h Base for all drivers (video, sound, music, etc). */
#ifndef DRIVER_H
#define DRIVER_H
#include "core/enum_type.hpp"
#include "core/string_compare_type.hpp"
#include <map>
const char *GetDriverParam(const char * const *parm, const char *name);
bool GetDriverParamBool(const char * const *parm, const char *name);
int GetDriverParamInt(const char * const *parm, const char *name, int def);
/** A driver for communicating with the user. */
class Driver {
public:
/**
* Start this driver.
* @param parm Parameters passed to the driver.
* @return NULL if everything went okay, otherwise an error message.
*/
virtual const char *Start(const char * const *parm) = 0;
/**
* Stop this driver.
*/
virtual void Stop() = 0;
virtual ~Driver() { }
/** The type of driver */
enum Type {
DT_BEGIN = 0, ///< Helper for iteration
DT_MUSIC = 0, ///< A music driver, needs to be before sound to properly shut down extmidi forked music players
DT_SOUND, ///< A sound driver
DT_VIDEO, ///< A video driver
DT_END, ///< Helper for iteration
};
/**
* Get the name of this driver.
* @return The name of the driver.
*/
virtual const char *GetName() const = 0;
};
DECLARE_POSTFIX_INCREMENT(Driver::Type)
/** Base for all driver factories. */
class DriverFactoryBase {
private:
Driver::Type type; ///< The type of driver.
const char *name; ///< The name of the drivers of this factory.
int priority; ///< The priority of this factory.
typedef std::map<const char *, DriverFactoryBase *, StringCompare> Drivers; ///< Type for a map of drivers.
/**
* Get the map with drivers.
*/
static Drivers &GetDrivers()
{
static Drivers &s_drivers = *new Drivers();
return s_drivers;
}
/**
* Get the active driver for the given type.
* @param type The type to get the driver for.
* @return The active driver.
*/
static Driver **GetActiveDriver(Driver::Type type)
{
static Driver *s_driver[3] = { NULL, NULL, NULL };
return &s_driver[type];
}
/**
* Get the driver type name.
* @param type The type of driver to get the name of.
* @return The name of the type.
*/
static const char *GetDriverTypeName(Driver::Type type)
{
static const char * const driver_type_name[] = { "music", "sound", "video" };
return driver_type_name[type];
}
protected:
void RegisterDriver(const char *name, Driver::Type type, int priority);
public:
DriverFactoryBase() :
name(NULL)
{}
virtual ~DriverFactoryBase();
/**
* Shuts down all active drivers
*/
static void ShutdownDrivers()
{
for (Driver::Type dt = Driver::DT_BEGIN; dt < Driver::DT_END; dt++) {
Driver *driver = *GetActiveDriver(dt);
if (driver != NULL) driver->Stop();
}
}
static Driver *SelectDriver(const char *name, Driver::Type type);
static char *GetDriversInfo(char *p, const char *last);
/**
* Get a nice description of the driver-class.
* @return The description.
*/
virtual const char *GetDescription() = 0;
/**
* Create an instance of this driver-class.
* @return The instance.
*/
virtual Driver *CreateInstance() = 0;
};
#endif /* DRIVER_H */
|