mirror of
https://github.com/JGRennison/OpenTTD-patches.git
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104 lines
2.0 KiB
C++
104 lines
2.0 KiB
C++
/* $Id$ */
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/** @file driver.h Base for all drivers (video, sound, music, etc). */
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#ifndef DRIVER_H
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#define DRIVER_H
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#include "debug.h"
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#include "core/enum_type.hpp"
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#include "string_func.h"
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#include <map>
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bool GetDriverParamBool(const char * const *parm, const char *name);
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int GetDriverParamInt(const char * const *parm, const char *name, int def);
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class Driver {
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public:
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virtual const char *Start(const char * const *parm) = 0;
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virtual void Stop() = 0;
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virtual ~Driver() { }
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enum Type {
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DT_BEGIN = 0,
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DT_SOUND = 0,
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DT_MUSIC,
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DT_VIDEO,
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DT_END,
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};
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};
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DECLARE_POSTFIX_INCREMENT(Driver::Type);
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class DriverFactoryBase {
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private:
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Driver::Type type;
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const char *name;
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int priority;
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struct StringCompare {
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bool operator () (const char *a, const char *b) const
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{
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return strcmp(a, b) < 0;
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}
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};
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typedef std::map<const char *, DriverFactoryBase *, StringCompare> Drivers;
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static Drivers &GetDrivers()
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{
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static Drivers &s_drivers = *new Drivers();
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return s_drivers;
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}
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static Driver **GetActiveDriver(Driver::Type type)
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{
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static Driver *s_driver[3] = { NULL, NULL, NULL };
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return &s_driver[type];
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}
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static const char *GetDriverTypeName(Driver::Type type)
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{
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static const char *driver_type_name[] = { "sound", "music", "video" };
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return driver_type_name[type];
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}
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protected:
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void RegisterDriver(const char *name, Driver::Type type, int priority);
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public:
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DriverFactoryBase() :
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name(NULL)
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{}
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virtual ~DriverFactoryBase();
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/** Shuts down all active drivers
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*/
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static void ShutdownDrivers()
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{
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for (Driver::Type dt = Driver::DT_BEGIN; dt < Driver::DT_END; dt++) {
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Driver *driver = *GetActiveDriver(dt);
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if (driver != NULL) driver->Stop();
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}
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}
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static const Driver *SelectDriver(const char *name, Driver::Type type);
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static char *GetDriversInfo(char *p, const char *last);
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/**
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* Get a nice description of the driver-class.
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*/
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virtual const char *GetDescription() = 0;
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/**
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* Create an instance of this driver-class.
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*/
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virtual Driver *CreateInstance() = 0;
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};
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#endif /* DRIVER_H */
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