formats:
	bitmap
	greyscale
	RGB
	BGR
	RGBA
	YUV?
	CYMK
	other non-framebuffer formats (PS, PDF, ...).

row stride (scan line) = ?
pixel size = ?
matrix format: (column, row) or (row, column)
memory starting address? which memory? Graphics adapter or main RAM or something else?
width
height

likewise for textures, just with extra flags (mipmaps for smaller areas etc)

abstractions:
	pen (style, thickness, color)
	brush (style, greyscale, color)
	flip buffers(?) [depending on graphics adapter, just set starting address]
	end-inclusive or end-exclusive?

Graphics Context abstraction?

operations:
	line(P1, P2, pen)
	rectangle(P1, P2, filled?)
	ellipse(C, A, B, filled?)  [ellipse(P1, P2) for bounding rectangle]
	bezier_path?? (strokes)
	triangle (P vertex[3], pen, filled?)
	convex/concav polygon (P[])
	flood fill
	blit(source_framebuffer, [area], destination_framebuffer, [area], [stretch to], [filtering algo])
		(operation = COPY|XOR|OR|???)

3D operations:
	ooz
	perspective correction