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/* $Id$ */

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#ifndef HAL_H

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#define HAL_H

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typedef struct {

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	const char *(*start)(const char * const *parm);

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	void (*stop)(void);

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} HalCommonDriver;

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typedef struct {

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	const char *(*start)(const char * const *parm);

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	void (*stop)(void);

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	void (*make_dirty)(int left, int top, int width, int height);

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	void (*main_loop)(void);

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	bool (*change_resolution)(int w, int h);

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	void (*toggle_fullscreen)(bool fullscreen);

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} HalVideoDriver;

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typedef struct {

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	const char *(*start)(const char * const *parm);

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	void (*stop)(void);

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} HalSoundDriver;

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typedef struct {

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	const char *(*start)(const char * const *parm);

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	void (*stop)(void);

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	void (*play_song)(const char *filename);

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	void (*stop_song)(void);

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	bool (*is_song_playing)(void);

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	void (*set_volume)(byte vol);

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} HalMusicDriver;

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extern HalMusicDriver *_music_driver;

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extern HalSoundDriver *_sound_driver;

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extern HalVideoDriver *_video_driver;

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enum DriverType {

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	VIDEO_DRIVER = 0,

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	SOUND_DRIVER = 1,

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	MUSIC_DRIVER = 2,

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};

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#endif /* HAL_H */