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GPU: Add pixel aspect ratio option

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Can display in 4:3, 16:9, 1:1 ratios.
This commit is contained in:
Connor McLaughlin
2020-04-10 15:12:16 +10:00
parent 3325d2c42c
commit fbfd838e22
10 changed files with 101 additions and 41 deletions
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17
src/core/gpu.cpp
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@ -29,6 +29,8 @@ bool GPU::Initialize(HostDisplay* host_display, System* system, DMA* dma, Interr
m_timers = timers;
m_force_progressive_scan = m_system->GetSettings().display_force_progressive_scan;
m_force_ntsc_timings = m_system->GetSettings().gpu_force_ntsc_timings;
m_crtc_state.display_aspect_ratio =
Settings::GetDisplayAspectRatioValue(m_system->GetSettings().display_aspect_ratio);
m_tick_event =
m_system->CreateTimingEvent("GPU Tick", 1, 1, std::bind(&GPU::Execute, this, std::placeholders::_1), true);
return true;
@ -44,6 +46,9 @@ void GPU::UpdateSettings()
UpdateCRTCConfig();
}
m_crtc_state.display_aspect_ratio =
Settings::GetDisplayAspectRatioValue(m_system->GetSettings().display_aspect_ratio);
// Crop mode calls this, so recalculate the display area
UpdateCRTCDisplayParameters();
}
@ -64,10 +69,14 @@ void GPU::SoftReset()
m_drawing_area.Set(0, 0, 0, 0);
m_drawing_area_changed = true;
m_drawing_offset = {};
std::memset(&m_crtc_state, 0, sizeof(m_crtc_state));
m_crtc_state.regs.display_address_start = 0;
std::memset(&m_crtc_state.regs, 0, sizeof(m_crtc_state.regs));
m_crtc_state.regs.horizontal_display_range = 0xC60260;
m_crtc_state.regs.vertical_display_range = 0x3FC10;
m_crtc_state.fractional_ticks = 0;
m_crtc_state.current_tick_in_scanline = 0;
m_crtc_state.current_scanline = 0;
m_crtc_state.in_hblank = false;
m_crtc_state.in_vblank = false;
m_state = State::Idle;
m_blitter_ticks = 0;
m_command_total_words = 0;
@ -136,7 +145,6 @@ bool GPU::DoState(StateWrapper& sw)
sw.Do(&m_crtc_state.fractional_ticks);
sw.Do(&m_crtc_state.current_tick_in_scanline);
sw.Do(&m_crtc_state.current_scanline);
sw.Do(&m_crtc_state.display_aspect_ratio);
sw.Do(&m_crtc_state.in_hblank);
sw.Do(&m_crtc_state.in_vblank);
@ -521,9 +529,6 @@ void GPU::UpdateCRTCDisplayParameters()
(vertical_visible_end_line - std::max(vertical_display_start, vertical_visible_start_line)) << height_shift,
VRAM_HEIGHT - cs.display_vram_top);
}
// Aspect ratio is always 4:3.
cs.display_aspect_ratio = 4.0f / 3.0f;
}
TickCount GPU::GetPendingGPUTicks() const