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Correct isLowerField calculation in FrameBufferList::renderBuffer.

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It did not work correct for Donkey Kong (E).
This commit is contained in:
Sergey Lipskiy 2014-09-28 13:44:03 +07:00
parent fb1a28c6db
commit 805cef4225
1 changed files with 2 additions and 4 deletions
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6
FrameBuffer.cpp
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@ -342,10 +342,8 @@ void FrameBufferList::renderBuffer(u32 _address)
GLint partHeight = 0;
const u32 vStart = _SHIFTR( *REG.VI_V_START, 17, 9 );
bool isLowerField = false;
if ((*REG.VI_STATUS & 0x40) != 0) {
const bool isPAL = (*REG.VI_V_SYNC & 0x3ff) > 550;
isLowerField = isPAL ? vStart < vStartPrev : vStart > vStartPrev;
}
if ((*REG.VI_STATUS & 0x40) != 0)
isLowerField = vStart > vStartPrev;
vStartPrev = vStart;
srcY0 = ((_address - pBuffer->m_startAddress) << 1 >> pBuffer->m_size) / (*REG.VI_WIDTH);