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GPU: Rewrite CRTC display modeling and overscan handling

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This commit is contained in:
Connor McLaughlin
2020-03-29 01:14:37 +10:00
parent fe824d6c89
commit 148279e2f2
9 changed files with 287 additions and 176 deletions
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41
src/core/gpu.h
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@ -313,6 +313,7 @@ protected:
// Sets dots per scanline
void UpdateCRTCConfig();
void UpdateCRTCDisplayParameters();
// Update ticks for this execution slice
void UpdateSliceTicks();
@ -547,19 +548,26 @@ protected:
u16 dot_clock_divider;
u16 visible_display_width;
u16 visible_display_height;
u16 active_display_left;
u16 active_display_top;
u16 active_display_width;
u16 active_display_height;
// Size of the simulated screen in pixels. Depending on crop mode, this may include overscan area.
u16 display_width;
u16 display_height;
TickCount horizontal_total;
TickCount horizontal_display_start;
TickCount horizontal_display_end;
u32 vertical_total;
u32 vertical_display_start;
u32 vertical_display_end;
// Top-left corner where the VRAM is displayed. Depending on the CRTC config, this may indicate padding.
u16 display_origin_left;
u16 display_origin_top;
// Rectangle describing the displayed area of VRAM, in coordinates.
u16 display_vram_left;
u16 display_vram_top;
u16 display_vram_width;
u16 display_vram_height;
u16 horizontal_total;
u16 horizontal_display_start;
u16 horizontal_display_end;
u16 vertical_total;
u16 vertical_display_start;
u16 vertical_display_end;
TickCount fractional_ticks;
TickCount current_tick_in_scanline;
@ -568,15 +576,6 @@ protected:
float display_aspect_ratio;
bool in_hblank;
bool in_vblank;
/// Returns a rectangle representing the active display region within the visible area of the screen, i.e. where the
/// VRAM texture should be "scanned out" to. Areas outside this region (the border) should be displayed as black.
Common::Rectangle<s32> GetActiveDisplayRectangle() const
{
return Common::Rectangle<s32>::FromExtents(
static_cast<s32>(ZeroExtend32(active_display_left)), static_cast<s32>(ZeroExtend32(active_display_top)),
static_cast<s32>(ZeroExtend32(active_display_width)), static_cast<s32>(ZeroExtend32(active_display_height)));
}
} m_crtc_state = {};
State m_state = State::Idle;