Default heuristics for variable-format displays

[Alexander Boström]

Here's my suggestion...

	def mode_megapixels(mode):
		return mode.width * mode.height

	# Sort by best refresh rate.
	modes.sort(key=lambda mode: -mode['refresh'])

	# Prefer to balance refresh rate vs. pixels.
	if dpi_known:
		acceptable = filter(lambda mode: mode.dpi >= 90, modes)
		if len(acceptable) > 0:
			# Anything above 90 DPI is good enough
			# for a default.
			# Pick the one with the best refresh.
			return acceptable[0]

	# DPI not known or too low, balance refresh vs. pixels.
	best_megapixels = max(modes, mode_megapixels)
	acceptable = filter(lambda mode: megapixels(mode) >=
			best_megapixels / 2)
	# Pick the mode with the highest refresh rate and at least
	# half the max possible number of pixels.
	acceptable[0]

/abo