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GPU: Add method to convert from window coordinates to beam ticks/lines

This commit is contained in:
Connor McLaughlin 2020-04-26 01:10:46 +10:00
parent a111e36ad7
commit 2ffcad3d37
4 changed files with 131 additions and 62 deletions
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113
src/core/gpu.cpp
View File

@ -142,9 +142,13 @@ bool GPU::DoState(StateWrapper& sw)
sw.Do(&m_crtc_state.display_vram_width);
sw.Do(&m_crtc_state.display_vram_height);
sw.Do(&m_crtc_state.horizontal_total);
sw.Do(&m_crtc_state.horizontal_active_start);
sw.Do(&m_crtc_state.horizontal_active_end);
sw.Do(&m_crtc_state.horizontal_display_start);
sw.Do(&m_crtc_state.horizontal_display_end);
sw.Do(&m_crtc_state.vertical_total);
sw.Do(&m_crtc_state.vertical_active_start);
sw.Do(&m_crtc_state.vertical_active_end);
sw.Do(&m_crtc_state.vertical_display_start);
sw.Do(&m_crtc_state.vertical_display_end);
sw.Do(&m_crtc_state.fractional_ticks);
@ -433,33 +437,31 @@ void GPU::UpdateCRTCDisplayParameters()
const u16 vertical_display_start = std::min<u16>(cs.regs.Y1, vertical_total);
const u16 vertical_display_end = std::min<u16>(cs.regs.Y2, vertical_total);
u16 horizontal_visible_start_tick, horizontal_visible_end_tick;
u16 vertical_visible_start_line, vertical_visible_end_line;
if (m_GPUSTAT.pal_mode)
{
// TODO: Verify PAL numbers.
switch (crop_mode)
{
case DisplayCropMode::None:
horizontal_visible_start_tick = 487;
horizontal_visible_end_tick = 3282;
vertical_visible_start_line = 20;
vertical_visible_end_line = 308;
cs.horizontal_active_start = 487;
cs.horizontal_active_end = 3282;
cs.vertical_active_start = 20;
cs.vertical_active_end = 308;
break;
case DisplayCropMode::Overscan:
horizontal_visible_start_tick = 628;
horizontal_visible_end_tick = 3188;
vertical_visible_start_line = 30;
vertical_visible_end_line = 298;
cs.horizontal_active_start = 628;
cs.horizontal_active_end = 3188;
cs.vertical_active_start = 30;
cs.vertical_active_end = 298;
break;
case DisplayCropMode::Borders:
default:
horizontal_visible_start_tick = horizontal_display_start;
horizontal_visible_end_tick = horizontal_display_end;
vertical_visible_start_line = vertical_display_start;
vertical_visible_end_line = vertical_display_end;
cs.horizontal_active_start = horizontal_display_start;
cs.horizontal_active_end = horizontal_display_end;
cs.vertical_active_start = vertical_display_start;
cs.vertical_active_end = vertical_display_end;
break;
}
}
@ -468,25 +470,25 @@ void GPU::UpdateCRTCDisplayParameters()
switch (crop_mode)
{
case DisplayCropMode::None:
horizontal_visible_start_tick = 488;
horizontal_visible_end_tick = 3288;
vertical_visible_start_line = 16;
vertical_visible_end_line = 256;
cs.horizontal_active_start = 488;
cs.horizontal_active_end = 3288;
cs.vertical_active_start = 16;
cs.vertical_active_end = 256;
break;
case DisplayCropMode::Overscan:
horizontal_visible_start_tick = 608;
horizontal_visible_end_tick = 3168;
vertical_visible_start_line = 24;
vertical_visible_end_line = 248;
cs.horizontal_active_start = 608;
cs.horizontal_active_end = 3168;
cs.vertical_active_start = 24;
cs.vertical_active_end = 248;
break;
case DisplayCropMode::Borders:
default:
horizontal_visible_start_tick = horizontal_display_start;
horizontal_visible_end_tick = horizontal_display_end;
vertical_visible_start_line = vertical_display_start;
vertical_visible_end_line = vertical_display_end;
cs.horizontal_active_start = horizontal_display_start;
cs.horizontal_active_end = horizontal_display_end;
cs.vertical_active_start = vertical_display_start;
cs.vertical_active_end = vertical_display_end;
break;
}
}
@ -495,62 +497,60 @@ void GPU::UpdateCRTCDisplayParameters()
// Determine screen size.
cs.display_width = std::max<u16>(
((horizontal_visible_end_tick - horizontal_visible_start_tick) + (cs.dot_clock_divider - 1)) / cs.dot_clock_divider,
1u);
cs.display_height = std::max<u16>((vertical_visible_end_line - vertical_visible_start_line) << height_shift, 1u);
((cs.horizontal_active_end - cs.horizontal_active_start) + (cs.dot_clock_divider - 1)) / cs.dot_clock_divider, 1u);
cs.display_height = std::max<u16>((cs.vertical_active_end - cs.vertical_active_start) << height_shift, 1u);
// Determine if we need to adjust the VRAM rectangle (because the display is starting outside the visible area) or add
// padding.
if (horizontal_display_start >= horizontal_visible_start_tick)
if (horizontal_display_start >= cs.horizontal_active_start)
{
cs.display_origin_left = (horizontal_display_start - horizontal_visible_start_tick) / cs.dot_clock_divider;
cs.display_origin_left = (horizontal_display_start - cs.horizontal_active_start) / cs.dot_clock_divider;
cs.display_vram_left = m_crtc_state.regs.X;
}
else
{
cs.display_origin_left = 0;
cs.display_vram_left = std::min<u16>(
m_crtc_state.regs.X + ((horizontal_visible_start_tick - horizontal_display_start) / cs.dot_clock_divider),
m_crtc_state.regs.X + ((cs.horizontal_active_start - horizontal_display_start) / cs.dot_clock_divider),
VRAM_WIDTH - 1);
}
if (horizontal_display_end <= horizontal_visible_end_tick)
if (horizontal_display_end <= cs.horizontal_active_end)
{
cs.display_vram_width =
std::max<u16>((((horizontal_display_end - std::max(horizontal_display_start, horizontal_visible_start_tick)) +
std::max<u16>((((horizontal_display_end - std::max(horizontal_display_start, cs.horizontal_active_start)) +
(cs.dot_clock_divider - 1)) /
cs.dot_clock_divider),
1u);
}
else
{
cs.display_vram_width = std::max<u16>(
(((horizontal_visible_end_tick - std::max(horizontal_display_start, horizontal_visible_start_tick)) +
(cs.dot_clock_divider - 1)) /
cs.dot_clock_divider),
1u);
cs.display_vram_width =
std::max<u16>((((cs.horizontal_active_end - std::max(horizontal_display_start, cs.horizontal_active_start)) +
(cs.dot_clock_divider - 1)) /
cs.dot_clock_divider),
1u);
}
if (vertical_display_start >= vertical_visible_start_line)
if (vertical_display_start >= cs.vertical_active_start)
{
cs.display_origin_top = (vertical_display_start - vertical_visible_start_line) << height_shift;
cs.display_origin_top = (vertical_display_start - cs.vertical_active_start) << height_shift;
cs.display_vram_top = m_crtc_state.regs.Y;
}
else
{
cs.display_origin_top = 0;
cs.display_vram_top =
m_crtc_state.regs.Y + ((vertical_visible_start_line - vertical_display_start) << height_shift);
cs.display_vram_top = m_crtc_state.regs.Y + ((cs.vertical_active_start - vertical_display_start) << height_shift);
}
if (vertical_display_end <= vertical_visible_end_line)
if (vertical_display_end <= cs.vertical_active_end)
{
cs.display_vram_height = (vertical_display_end - std::max(vertical_display_start, vertical_visible_start_line))
cs.display_vram_height = (vertical_display_end - std::max(vertical_display_start, cs.vertical_active_start))
<< height_shift;
}
else
{
cs.display_vram_height = (vertical_visible_end_line - std::max(vertical_display_start, vertical_visible_start_line))
cs.display_vram_height = (cs.vertical_active_end - std::max(vertical_display_start, cs.vertical_active_start))
<< height_shift;
}
}
@ -705,6 +705,27 @@ void GPU::Execute(TickCount ticks)
UpdateSliceTicks();
}
bool GPU::ConvertScreenCoordinatesToBeamTicksAndLines(s32 window_x, s32 window_y, u32* out_tick, u32* out_line) const
{
const auto [display_x, display_y] = m_host_display->ConvertWindowCoordinatesToDisplayCoordinates(
window_x, window_y, m_host_display->GetWindowWidth(), m_host_display->GetWindowHeight(),
m_host_display->GetDisplayTopMargin());
Log_DebugPrintf("win %d,%d -> disp %d,%d (size %u,%u frac %f,%f)", window_x, window_y, display_x, display_y,
m_crtc_state.display_width, m_crtc_state.display_height,
static_cast<float>(display_x) / static_cast<float>(m_crtc_state.display_width),
static_cast<float>(display_y) / static_cast<float>(m_crtc_state.display_height));
if (display_x < 0 || static_cast<u32>(display_x) >= m_crtc_state.display_width || display_y < 0 ||
static_cast<u32>(display_y) >= m_crtc_state.display_height)
{
return false;
}
*out_line = (static_cast<u32>(display_y) >> BoolToUInt8(m_GPUSTAT.In480iMode())) + 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;
}
u32 GPU::ReadGPUREAD()
{
if (m_blitter_state != BlitterState::ReadingVRAM)

7
src/core/gpu.h
View File

@ -162,6 +162,9 @@ public:
// gpu_sw.cpp
static std::unique_ptr<GPU> CreateSoftwareRenderer();
// Converts window coordinates into horizontal ticks and scanlines. Returns false if out of range. Used for lightguns.
bool ConvertScreenCoordinatesToBeamTicksAndLines(s32 window_x, s32 window_y, u32* out_tick, u32* out_line) const;
protected:
static TickCount GPUTicksToSystemTicks(TickCount gpu_ticks)
{
@ -607,9 +610,13 @@ protected:
u16 display_vram_height;
u16 horizontal_total;
u16 horizontal_active_start;
u16 horizontal_active_end;
u16 horizontal_display_start;
u16 horizontal_display_end;
u16 vertical_total;
u16 vertical_active_start;
u16 vertical_active_end;
u16 vertical_display_start;
u16 vertical_display_end;

62
src/core/host_display.cpp
View File

@ -18,7 +18,9 @@ void HostDisplay::WindowResized(s32 new_window_width, s32 new_window_height)
m_window_height = new_window_height;
}
std::tuple<s32, s32, s32, s32> HostDisplay::CalculateDrawRect(s32 window_width, s32 window_height, s32 top_margin) const
void HostDisplay::CalculateDrawRect(s32 window_width, s32 window_height, s32* out_left, s32* out_top, s32* out_width,
s32* out_height, s32* out_left_padding, s32* out_top_padding, float* out_scale,
float* out_y_scale) const
{
const float y_scale =
(static_cast<float>(m_display_width) / static_cast<float>(m_display_height)) / m_display_pixel_aspect_ratio;
@ -28,38 +30,66 @@ std::tuple<s32, s32, s32, s32> HostDisplay::CalculateDrawRect(s32 window_width,
const float active_top = static_cast<float>(m_display_active_top) * y_scale;
const float active_width = static_cast<float>(m_display_active_width);
const float active_height = static_cast<float>(m_display_active_height) * y_scale;
if (out_y_scale)
*out_y_scale = y_scale;
// now fit it within the window
const float window_ratio = static_cast<float>(window_width) / static_cast<float>(window_height);
float scale;
int top_padding = 0, left_padding = 0;
if ((display_width / display_height) >= window_ratio)
{
// align in middle vertically
scale = static_cast<float>(window_width) / display_width;
top_padding = (window_height - top_margin - static_cast<s32>(display_height * scale)) / 2;
if (out_left_padding)
*out_left_padding = 0;
if (out_top_padding)
*out_top_padding = std::max<s32>((window_height - static_cast<s32>(display_height * scale)) / 2, 0);
}
else
{
// align in middle horizontally
scale = static_cast<float>(window_height - top_margin) / display_height;
left_padding = (window_width - static_cast<s32>(display_width * scale)) / 2;
scale = static_cast<float>(window_height) / display_height;
if (out_left_padding)
*out_left_padding = std::max<s32>((window_width - static_cast<s32>(display_width * scale)) / 2, 0);
if (out_top_padding)
*out_top_padding = 0;
}
int left, top, width, height;
width = static_cast<s32>(active_width * scale);
height = static_cast<s32>(active_height * scale);
left = static_cast<s32>(active_left * scale);
top = static_cast<s32>(active_top * scale);
*out_width = static_cast<s32>(active_width * scale);
*out_height = static_cast<s32>(active_height * scale);
*out_left = static_cast<s32>(active_left * scale);
*out_top = static_cast<s32>(active_top * scale);
if (out_scale)
*out_scale = scale;
}
left += std::max(left_padding, 0);
top += std::max(top_padding, 0);
std::tuple<s32, s32, s32, s32> HostDisplay::CalculateDrawRect(s32 window_width, s32 window_height, s32 top_margin) const
{
s32 left, top, width, height, left_padding, top_padding;
CalculateDrawRect(window_width, window_height - top_margin, &left, &top, &width, &height, &left_padding, &top_padding,
nullptr, nullptr);
return std::make_tuple(left + left_padding, top + top_padding + top_margin, width, height);
}
// add in margin
top += top_margin;
return std::tie(left, top, width, height);
std::tuple<s32, s32> HostDisplay::ConvertWindowCoordinatesToDisplayCoordinates(s32 window_x, s32 window_y,
s32 window_width, s32 window_height,
s32 top_margin) const
{
s32 left, top, width, height, left_padding, top_padding;
float scale, y_scale;
CalculateDrawRect(window_width, window_height - top_margin, &left, &top, &width, &height, &left_padding, &top_padding,
&scale, &y_scale);
// convert coordinates to active display region, then to full display region
const float scaled_display_x = static_cast<float>(window_x - (left_padding));
const float scaled_display_y = static_cast<float>(window_y - (top_padding + top_margin));
// scale back to internal resolution
const float display_x = scaled_display_x / scale;
const float display_y = scaled_display_y / scale / y_scale;
return std::make_tuple(static_cast<s32>(display_x), static_cast<s32>(display_y));
}
bool HostDisplay::WriteTextureToFile(const void* texture_handle, u32 x, u32 y, u32 width, u32 height,

11
src/core/host_display.h
View File

@ -30,6 +30,9 @@ public:
virtual ~HostDisplay();
ALWAYS_INLINE s32 GetWindowWidth() const { return m_window_width; }
ALWAYS_INLINE s32 GetWindowHeight() const { return m_window_height; }
virtual RenderAPI GetRenderAPI() const = 0;
virtual void* GetRenderDevice() const = 0;
virtual void* GetRenderContext() const = 0;
@ -96,6 +99,10 @@ public:
/// Helper function for computing the draw rectangle in a larger window.
std::tuple<s32, s32, s32, s32> CalculateDrawRect(s32 window_width, s32 window_height, s32 top_margin) const;
/// Helper function for converting window coordinates to display coordinates.
std::tuple<s32, s32> ConvertWindowCoordinatesToDisplayCoordinates(s32 window_x, s32 window_y, s32 window_width,
s32 window_height, s32 top_margin) const;
/// Helper function to save texture data to a PNG. If flip_y is set, the image will be flipped aka OpenGL.
bool WriteTextureToFile(const void* texture_handle, u32 x, u32 y, u32 width, u32 height, const char* filename,
bool clear_alpha = true, bool flip_y = false, u32 resize_width = 0, u32 resize_height = 0);
@ -108,6 +115,10 @@ public:
bool clear_alpha = true);
protected:
void CalculateDrawRect(s32 window_width, s32 window_height, s32* out_left, s32* out_top, s32* out_width,
s32* out_height, s32* out_left_padding, s32* out_top_padding, float* out_scale,
float* out_y_scale) const;
s32 m_window_width = 0;
s32 m_window_height = 0;