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GPU: Tweaks to ODE handling

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Fixes Team Buddies and The Next Tetris.
This commit is contained in:
Connor McLaughlin
2020-08-15 14:56:20 +10:00
parent a8699d9908
commit d4665e8b22
5 changed files with 25 additions and 17 deletions
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18
src/core/gpu.cpp
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@ -162,6 +162,7 @@ bool GPU::DoState(StateWrapper& sw)
sw.Do(&m_crtc_state.in_hblank);
sw.Do(&m_crtc_state.in_vblank);
sw.Do(&m_crtc_state.interlaced_field);
sw.Do(&m_crtc_state.interlaced_display_field);
sw.Do(&m_crtc_state.active_line_lsb);
sw.Do(&m_blitter_state);
@ -734,10 +735,10 @@ void GPU::CRTCTickEvent(TickCount ticks)
System::FrameDone();
// switch fields early. this is needed so we draw to the correct one.
if (m_GPUSTAT.vertical_interlace)
m_crtc_state.interlaced_field ^= 1u;
if (m_GPUSTAT.InInterleaved480iMode())
m_crtc_state.interlaced_display_field = m_crtc_state.interlaced_field ^ 1u;
else
m_crtc_state.interlaced_field = 0;
m_crtc_state.interlaced_display_field = 0;
}
g_timers.SetGate(HBLANK_TIMER_INDEX, new_vblank);
@ -749,15 +750,20 @@ void GPU::CRTCTickEvent(TickCount ticks)
{
// start the new frame
m_crtc_state.current_scanline = 0;
if (m_GPUSTAT.vertical_interlace)
m_crtc_state.interlaced_field ^= 1u;
else
m_crtc_state.interlaced_field = 0;
}
}
// alternating even line bit in 240-line mode
if (m_GPUSTAT.vertical_interlace)
if (m_GPUSTAT.InInterleaved480iMode())
{
m_crtc_state.active_line_lsb =
ConvertToBoolUnchecked((m_crtc_state.regs.Y + BoolToUInt32(m_crtc_state.interlaced_field)) & u32(1));
m_GPUSTAT.display_line_lsb = m_crtc_state.active_line_lsb && !m_crtc_state.in_vblank;
Truncate8((m_crtc_state.regs.Y + BoolToUInt32(m_crtc_state.interlaced_display_field)) & u32(1));
m_GPUSTAT.display_line_lsb = ConvertToBoolUnchecked(
(m_crtc_state.regs.Y + (BoolToUInt8(m_crtc_state.in_vblank) ^ m_crtc_state.interlaced_display_field)) & u32(1));
}
else
{