MGislv/GLideN64
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Correct VI.height calculation.

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In case of interlaced mode both half-fields are used and thus all half-lines
must be taken into account.
This commit is contained in:
Sergey Lipskiy 2014-01-19 22:18:07 +07:00
parent 467cc44185
commit 1711da98ae
1 changed files with 4 additions and 3 deletions
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7
VI.cpp
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@ -22,9 +22,10 @@ void VI_UpdateSize()
u32 hEnd = _SHIFTR( *REG.VI_H_START, 0, 10 );
u32 hStart = _SHIFTR( *REG.VI_H_START, 16, 10 );
// These are in half-lines, so shift an extra bit
u32 vEnd = _SHIFTR( *REG.VI_V_START, 1, 9 );
u32 vStart = _SHIFTR( *REG.VI_V_START, 17, 9 );
// Shift an extra bit if not in interlaced mode
u32 extraShift = (*REG.VI_STATUS & 0x40) == 0x40 ? 0 : 1;
u32 vEnd = _SHIFTR( *REG.VI_V_START, 0 + extraShift, 10 - extraShift );
u32 vStart = _SHIFTR( *REG.VI_V_START, 16 + extraShift, 10 - extraShift );
VI.width = (hEnd - hStart) * xScale;
VI.real_height = (vEnd - vStart) * yScale;