platform

type AudioPlayer interface {
	LoadMusic(name string, data []byte) error
	PlayMusic(name string, fade time.Duration, loops int) error
	FadeMusic(fade time.Duration) error
	IsPlayingMusic() bool
	IsPausedMusic() bool
	StopMusic()
	PauseMusic()
	ResumeMusic()
	VolumeMusic(vol int) int
	MusicCallback(cb func())

	LoadSound(name string, data []byte) (Sound, error)
	Sound(name string) (Sound, error)

	StopChannel(channel int)
	IsPlayingChannel(channel int) bool
	FadeChannel(channel int, fade time.Duration) error
	VolumeChannel(channel, vol int) int
	ReserveChannels(num int) int
	ChannelCallback(cb func(int))

	Shutdown()
}

type Event interface{}

type KeyDownEvent struct {
	Rune     rune
	Key, Mod int
}

type KeyUpEvent struct {
	Rune     rune
	Key, Mod int
}

type MouseButtonEvent struct {
	X, Y, Button, Type int
}

type MouseMotionEvent struct {
	X, Y, XRel, YRel int
}

type MouseState struct {
	X, Y    int
	Buttons [3]bool
}

type QuitEvent struct{}

type Renderer interface {
	Clear()
	Present()
	Shutdown()
	ToggleFullscreen()
	SetWindowTitle(title string)
	BackBuffer() draw.Image

	DrawRect(dest image.Rectangle, c color.Color, fill bool)

	BlitPaletted(dp image.Point, src *image.Paletted)
	BlitImage(dp image.Point, src *image.Paletted, pal color.Palette)
	Blit(dp image.Point, src *image.Paletted, sr image.Rectangle, pal color.Palette)
}

type Sound interface {
	String() string
	Length() time.Duration
	Play(channel, loops int, fade time.Duration) (int, error)
	Volume(vol int) int
}