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Merge pull request #644 from phire/invalid-field-order 

Implement the correct method for determining XFB field order.
This commit is contained in:
Lioncash 2014-07-18 02:28:22 -04:00
parent 063f530d4c 7aff56bef5
commit c10674b9d4
1 changed files with 18 additions and 19 deletions
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29
Source/Core/Core/HW/VideoInterface.cpp
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@ -519,27 +519,26 @@ static void BeginField(FieldType field)
u32 fbHeight = m_VerticalTimingRegister.ACV * (field == FIELD_PROGRESSIVE ? 1 : 2);
u32 xfbAddr;
// NTSC and PAL have opposite field orders.
if (m_DisplayControlRegister.FMT == 1) // PAL
// Only the top field is valid in progressive mode.
if (field == FieldType::FIELD_PROGRESSIVE)
{
// But the PAL ports of some games are poorly programmed and don't use correct ordering.
// Zelda: Wind Waker and Simpsons Hit & Run are exampes of this, there are probally more.
// PAL Wind Waker also runs at 30fps instead of 25.
if (field == FieldType::FIELD_PROGRESSIVE || GetXFBAddressBottom() != (GetXFBAddressTop() - 1280))
{
WARN_LOG(VIDEOINTERFACE, "PAL game is trying to use incorrect (NTSC) field ordering");
// Lets kindly fix this for them.
xfbAddr = GetXFBAddressTop();
// TODO: PAL Simpsons Hit & Run now has a green line at the bottom when Real XFB is used.
// Might be a bug later on in our code, or a bug in the actual game.
}
else
{
xfbAddr = GetXFBAddressBottom();
}
} else {
// If we are displaying an interlaced field, we convert it to a progressive field
// by simply using the whole XFB, which 99% of the time contains a whole progressive
// frame.
// All known NTSC games use the top/odd field as the upper field but
// PAL games are known to whimsically arrange the fields in either order.
// So to work out which field is pointing to the top of the progressive XFB we check
// which field has the lower PRB value in the VBlank Timing Registers.
if(m_VBlankTimingOdd.PRB < m_VBlankTimingEven.PRB)
xfbAddr = GetXFBAddressTop();
else
xfbAddr = GetXFBAddressBottom();
}
static const char* const fieldTypeNames[] = { "Progressive", "Upper", "Lower" };