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ScanTarget subsystem improvements #1242
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A bit of a megaticket, but issues to address if reopening that box:
ScanTarget
should be able to request true horizontals if being given CRT-style input;Suggested new pixel format:
One byte per pixel; two bits for channel plus six for intensity. Channel is any of red, green or blue. White is a potential fourth value, but I'm not sure it's valuable given that
Luminance8
is already specified and I'm unaware of any vintage machines with an RGBW LCD.The intention is that machines with an LCD with visible subpixels can tag samples based on which subpixel they fall within. I think this is easiest handled in a per-pixel form rather than trying to provide it as out-of-band modal state due to irregularities like the PC Engine GT and Game Gear when running Master System titles, both of which use less than a whole triplet per pixel.
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