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Just do a multiply and divide. Easy.

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This commit is contained in:
Thomas Harte 2023-01-21 14:19:52 -05:00
parent c9643c4145
commit d1f929e6f7
1 changed files with 3 additions and 4 deletions
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7
Components/9918/Implementation/9918.cpp
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@ -844,10 +844,9 @@ void Base<personality>::write_palette(uint8_t value) {
write_phase_ = false; write_phase_ = false;
// TODO: the below scales the palette into the range 0–252 rather than 0–255; correct. const uint8_t r = ((Storage<personality>::new_colour_ >> 4) & 7) * 255 / 7;
const uint8_t r = ((Storage<personality>::new_colour_ >> 4) & 7) * 36; const uint8_t g = (value & 7) * 255 / 7;
const uint8_t g = (value & 7) * 36; const uint8_t b = (Storage<personality>::new_colour_ & 7) * 255 / 7;
const uint8_t b = (Storage<personality>::new_colour_ & 7) * 36;
Storage<personality>::palette_[Storage<personality>::palette_entry_ & 0xf] = palette_pack(r, g, b); Storage<personality>::palette_[Storage<personality>::palette_entry_ & 0xf] = palette_pack(r, g, b);
++Storage<personality>::palette_entry_; ++Storage<personality>::palette_entry_;