`tbitmap`
		pixel
		pixels
	ro	scanline
	ro	scanhigh
	ro	scanlinestep
		colorforeground
		colorbackground
		alignment
		opacity
		onchange

`tsimplebitmap`
		handle
		kind
	ro	canvas
		size
		width
		height

`tnullinterfacedpersistent`

`tvirtualpersistent`