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Reworked the "Force NTSC Timings" feature to support both NTSC and PAL frame timings (#3287)

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This commit is contained in:
spacepaw
2024-09-03 10:50:45 +02:00
committed by Stenzek
parent 4c51337edd
commit 63abdb7afd
12 changed files with 118 additions and 43 deletions
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26
src/core/gpu.cpp
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@ -88,7 +88,7 @@ GPU::~GPU()
bool GPU::Initialize()
{
m_force_progressive_scan = g_settings.gpu_disable_interlacing;
m_force_ntsc_timings = g_settings.gpu_force_ntsc_timings;
m_force_frame_timings = g_settings.gpu_force_frame_timings;
s_crtc_tick_event.Activate();
m_fifo_size = g_settings.gpu_fifo_size;
m_max_run_ahead = g_settings.gpu_max_run_ahead;
@ -119,9 +119,9 @@ void GPU::UpdateSettings(const Settings& old_settings)
m_fifo_size = g_settings.gpu_fifo_size;
m_max_run_ahead = g_settings.gpu_max_run_ahead;
if (m_force_ntsc_timings != g_settings.gpu_force_ntsc_timings || m_console_is_pal != System::IsPALRegion())
if (m_force_frame_timings != g_settings.gpu_force_frame_timings)
{
m_force_ntsc_timings = g_settings.gpu_force_ntsc_timings;
m_force_frame_timings = g_settings.gpu_force_frame_timings;
m_console_is_pal = System::IsPALRegion();
UpdateCRTCConfig();
}
@ -637,7 +637,7 @@ void GPU::UpdateCRTCConfig()
cs.vertical_display_start = std::min<u16>(cs.regs.Y1, cs.vertical_total);
cs.vertical_display_end = std::min<u16>(cs.regs.Y2, cs.vertical_total);
if (m_GPUSTAT.pal_mode && m_force_ntsc_timings)
if (m_GPUSTAT.pal_mode && m_force_frame_timings == ForceFrameTimingsMode::NTSC)
{
// scale to NTSC parameters
cs.horizontal_display_start =
@ -655,6 +655,24 @@ void GPU::UpdateCRTCConfig()
cs.horizontal_total = NTSC_TICKS_PER_LINE;
cs.current_tick_in_scanline %= NTSC_TICKS_PER_LINE;
}
else if (!m_GPUSTAT.pal_mode && m_force_frame_timings == ForceFrameTimingsMode::PAL)
{
// scale to PAL parameters
cs.horizontal_display_start =
static_cast<u16>((static_cast<u32>(cs.horizontal_display_start) * PAL_TICKS_PER_LINE) / NTSC_TICKS_PER_LINE);
cs.horizontal_display_end = static_cast<u16>(
((static_cast<u32>(cs.horizontal_display_end) * PAL_TICKS_PER_LINE) + (NTSC_TICKS_PER_LINE - 1)) /
NTSC_TICKS_PER_LINE);
cs.vertical_display_start =
static_cast<u16>((static_cast<u32>(cs.vertical_display_start) * PAL_TOTAL_LINES) / NTSC_TOTAL_LINES);
cs.vertical_display_end = static_cast<u16>(
((static_cast<u32>(cs.vertical_display_end) * PAL_TOTAL_LINES) + (NTSC_TOTAL_LINES - 1)) / NTSC_TOTAL_LINES);
cs.vertical_total = PAL_TOTAL_LINES;
cs.current_scanline %= PAL_TOTAL_LINES;
cs.horizontal_total = PAL_TICKS_PER_LINE;
cs.current_tick_in_scanline %= PAL_TICKS_PER_LINE;
}
cs.horizontal_display_start =
static_cast<u16>(System::ScaleTicksToOverclock(static_cast<TickCount>(cs.horizontal_display_start)));