image converter does not do proper rgb_to_color565 conversion

[Troyhy]

Hi, I was using this image converter and noticed that with test picture like this

color palette does not have pure white 0xFFFF but it has 0xFFF8. Question is that is this somehow intentional or a bug?
Here is the converter function and my proposed fix:

r=g=b=255
a = ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b & 0xF8)
#fixed
b = ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3)
print(f'{a:016b} != {b:016b}\n{a:2x} != {b:2x}')

# 1111111111111000 != 1111111111111111
# fff8 != ffff

st7789py_mpy/utils/image_converter.py

Lines 47 to 60 in 7265925

	def rgb_to_color565(r, g, b):
	"""
	Convert RGB color to the 16-bit color format (565).
	Args:
	r (int): Red component of the RGB color (0-255).
	g (int): Green component of the RGB color (0-255).
	b (int): Blue component of the RGB color (0-255).
	Returns:
	int: Converted color value in the 16-bit color format (565).
	"""
	return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b & 0xF8)

[Troyhy]

Ah sorry, just realized that there is a pull request about it #14