• src/conio/scale.c xbr.c src/syncterm/syncterm.c

    From Deucе@VERT to Git commit to main/sbbs/master on Tue Oct 22 21:45:39 2024
    https://gitlab.synchro.net/main/sbbs/-/commit/b84c583a26e6f9145cde5de0
    Modified Files:
    src/conio/scale.c xbr.c src/syncterm/syncterm.c
    Log Message:
    Rejigger width iterpolation.

    The old code expected the L1 cache to be fairly large, and the
    prefetcher to be fairly smart, and did updates by columns to save
    some math. This change performs width interpolation row-by-row
    so even the dumbest prefetcher can get it right, and there's no
    need to keep the whole source and destination images in the cache.

    This may help out older processors when scaling with interpolation
    (most commonly used in fullscreen).

    It's entirely possible though that this won't be enough and they'll
    still need to use "External" scaling.

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