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More accurate pointer math for the 16-bit case

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This commit is contained in:
disinvite 2023-10-14 15:03:19 -04:00
parent b31e64892c
commit ddddc9d5d2
1 changed files with 4 additions and 1 deletions
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5
LEGO1/mxtransitionmanager.cpp
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@ -318,7 +318,10 @@ void MxTransitionManager::Transition_Pixelation()
} else {
MxU32 new_color = MAKELONG(sample, sample);
MxU8 *pos = surface + k * ddsd.lPitch + x_shift;
// You might expect a cast to MxU16* instead, but lPitch is
// bytes/scanline, not pixels/scanline. Therefore, we just
// need to double the x_shift to get to the right spot.
MxU8 *pos = surface + k * ddsd.lPitch + 2*x_shift;
MxU32 *dest = (MxU32*)pos;
// Sets 10 pixels (20 bytes)
dest[0] = new_color;