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GPU: Implement non-interleaved interlaced rendering

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Fixes screen shaking in True Pinball.
This commit is contained in:
Connor McLaughlin
2020-05-26 03:18:04 +10:00
parent 0daea7c2fc
commit e368dbbadc
11 changed files with 76 additions and 43 deletions
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11
src/core/gpu.cpp
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@ -497,7 +497,7 @@ void GPU::UpdateCRTCDisplayParameters()
}
}
const u8 height_shift = BoolToUInt8(m_GPUSTAT.In480iMode());
const u8 height_shift = BoolToUInt8(m_GPUSTAT.vertical_interlace);
// Determine screen size.
cs.display_width = (((cs.horizontal_active_end - cs.horizontal_active_start) / cs.dot_clock_divider) + 2u) & ~3u;
@ -711,16 +711,16 @@ void GPU::Execute(TickCount ticks)
}
// alternating even line bit in 240-line mode
if (m_GPUSTAT.In480iMode())
if (m_GPUSTAT.vertical_interlace)
{
m_crtc_state.displaying_odd_lines =
ConvertToBoolUnchecked((m_crtc_state.regs.Y + BoolToUInt32(m_crtc_state.displaying_odd_field)) & u32(1));
m_GPUSTAT.displaying_odd_line = m_crtc_state.displaying_odd_lines && !m_crtc_state.in_vblank;
m_GPUSTAT.drawing_odd_lines = !m_crtc_state.displaying_odd_lines && !m_crtc_state.in_vblank;
}
else
{
m_crtc_state.displaying_odd_lines = false;
m_GPUSTAT.displaying_odd_line =
m_GPUSTAT.drawing_odd_lines =
ConvertToBoolUnchecked((m_crtc_state.regs.Y + m_crtc_state.current_scanline) & u32(1));
}
@ -743,7 +743,8 @@ bool GPU::ConvertScreenCoordinatesToBeamTicksAndLines(s32 window_x, s32 window_y
return false;
}
*out_line = (static_cast<u32>(display_y) >> BoolToUInt8(m_GPUSTAT.In480iMode())) + m_crtc_state.vertical_active_start;
*out_line =
(static_cast<u32>(display_y) >> BoolToUInt8(m_GPUSTAT.vertical_interlace)) + m_crtc_state.vertical_active_start;
*out_tick = (static_cast<u32>(display_x) * m_crtc_state.dot_clock_divider) + m_crtc_state.horizontal_active_start;
return true;
}