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oh, and btw, just say if 127.5 is exactly how standards defined it, and gray colors are not representable, pure black will be rounded to its closest color [0, 128, 128] at uint8_t and [0, 32768, 32768] at uint16_t, your way, * 257, it's gonna be [0, 32896, 32896], my way, [0, 32768, 32768], and obviously the error between 32768 and 32767.5 << the error between 32896 and 32767.5
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