vm

var (
	SystemFont = Font{
		Width:        4,
		WidthSpecial: 8,
		Height:       6,
	}

	CustomFont = Font{
		Width:        4,
		WidthSpecial: 8,
		Height:       6,
	}
)

var (
	// Update is a user provided function executed each frame (30 times per second).
	//
	// The purpose of this function is to handle user input, perform calculations, update
	// game state etc. Typically, this function does not draw on screen.
	Update func()

	// Draw is a user provided function executed at most each frame (up to 30 times per second).
	// π may skip calling this function if previous frame took too long.
	//
	// The purpose of this function is to draw on screen.
	Draw func()
)

var (
	// Palette has all colors available in the game. Up to 256.
	// Palette is taken from loaded sprite sheet (which must be
	// a PNG file with indexed color mode). If sprite-sheet.png was not
	// found, then default 16 color palette is used.
	//
	// Can be freely read and updated. Changes will be visible immediately.
	Palette [256]RGB

	DrawPalette    [256]byte
	DisplayPalette [256]byte

	ColorTransparency [256]bool
)

var (
	// ScreenData contains pixel colors for the screen visible by the player.
	// Each pixel is one byte. It is initialized during pi.Boot.
	//
	// Pixels on the screen are organized from left to right,
	// top to bottom. Slice element number 0 has pixel located
	// in the top-left corner. Slice element number 1 has pixel color
	// on the right and so on.
	//
	// Can be freely read and updated. Useful when you want to use your own
	// functions for pixel manipulation.
	// Pi will panic if you try to change the length of the slice.
	ScreenData []byte

	// ScreenWidth is the width of the screen (in pixels).
	ScreenWidth int

	// ScreenHeight is the height of the screen (in pixels).
	ScreenHeight int
)

var (
	// SpriteSheetWidth is a sprite-sheet width in pixels
	SpriteSheetWidth int
	// SpriteSheetHeight is a sprite-sheet height in pixels
	SpriteSheetHeight int

	// SpriteSheetData contains pixel colors for the entire sprite sheet.
	// Each pixel is one byte. It is initialized during pi.Boot.
	//
	// Pixels in the sprite-sheet are organized from left to right,
	// top to bottom. Slice element number 0 has pixel located
	// in the top-left corner. Slice element number 1 has a pixel color
	// on the right and so on.
	//
	// Can be freely read and updated.
	// Useful when you want to use your own functions for pixel manipulation.
	// Pi will panic if you try to change the length of the slice.
	SpriteSheetData []byte
)

var (
	// TimeSeconds is the number of seconds since game was started
	TimeSeconds float64

	GameLoopStopped bool
)

var Controllers [8]Controller // 0th element is for Player 0, 1st for Player 1 etc.

var KeyDuration [97]uint

var MouseBtnDuration [3]uint