Calculates a new palette interpolated between two others.


void fade_interpolate(const PALETTE source, const PALETTE dest, PALETTE output, int pos, int from, int to);
Calculates a temporary palette part way between source and dest, returning it in the output parameter. The position between the two extremes is specified by the pos value: 0 returns an exact copy of source, 64 returns dest, 32 returns a palette half way between the two, etc. This routine only affects colors between from and to (inclusive: pass 0 and 255 to interpolate the entire palette).

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