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GPU: Use floating point coordinates for lightgun

This commit is contained in:
Connor McLaughlin 2020-12-19 14:29:35 +10:00
parent 4860313bef
commit e804fdfdba
3 changed files with 15 additions and 14 deletions
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17
src/core/gpu.cpp
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@ -927,15 +927,15 @@ bool GPU::ConvertScreenCoordinatesToBeamTicksAndLines(s32 window_x, s32 window_y
if (x_scale != 1.0f)
{
const float dw = static_cast<float>(m_crtc_state.display_width);
float scaled_x = ((static_cast<float>(display_x) / dw) * 2.0f) - 1.0f; // 0..1 -> -1..1
float scaled_x = ((display_x / dw) * 2.0f) - 1.0f; // 0..1 -> -1..1
scaled_x *= x_scale;
display_x = static_cast<s32>(((scaled_x + 1.0f) * 0.5f) * dw); // -1..1 -> 0..1
display_x = (((scaled_x + 1.0f) * 0.5f) * dw); // -1..1 -> 0..1
}
Log_DebugPrintf("win %d,%d -> disp %d,%d (size %u,%u frac %f,%f)", window_x, window_y, display_x, display_y,
Log_DebugPrintf("win %d,%d -> disp %.2f,%.2f (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));
display_x / static_cast<float>(m_crtc_state.display_width),
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)
@ -943,9 +943,10 @@ bool GPU::ConvertScreenCoordinatesToBeamTicksAndLines(s32 window_x, s32 window_y
return false;
}
*out_line =
(static_cast<u32>(display_y) >> BoolToUInt8(m_GPUSTAT.vertical_interlace)) + m_crtc_state.vertical_visible_start;
*out_tick = (static_cast<u32>(display_x) * m_crtc_state.dot_clock_divider) + m_crtc_state.horizontal_visible_start;
*out_line = (static_cast<u32>(std::round(display_y)) >> BoolToUInt8(m_GPUSTAT.vertical_interlace)) +
m_crtc_state.vertical_visible_start;
*out_tick = static_cast<u32>(std::round(display_x * static_cast<float>(m_crtc_state.dot_clock_divider))) +
m_crtc_state.horizontal_visible_start;
return true;
}

4
src/core/host_display.cpp
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@ -257,7 +257,7 @@ std::tuple<s32, s32, s32, s32> HostDisplay::CalculateSoftwareCursorDrawRect(s32
return std::tie(out_left, out_top, out_width, out_height);
}
std::tuple<s32, s32> HostDisplay::ConvertWindowCoordinatesToDisplayCoordinates(s32 window_x, s32 window_y,
std::tuple<float, float> HostDisplay::ConvertWindowCoordinatesToDisplayCoordinates(s32 window_x, s32 window_y,
s32 window_width, s32 window_height,
s32 top_margin) const
{
@ -274,7 +274,7 @@ std::tuple<s32, s32> HostDisplay::ConvertWindowCoordinatesToDisplayCoordinates(s
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));
return std::make_tuple(display_x, display_y);
}
static bool CompressAndWriteTextureToFile(u32 width, u32 height, std::string filename, FileSystem::ManagedCFilePtr fp,

2
src/core/host_display.h
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@ -190,7 +190,7 @@ public:
bool apply_aspect_ratio = true) const;
/// Helper function for converting window coordinates to display coordinates.
std::tuple<s32, s32> ConvertWindowCoordinatesToDisplayCoordinates(s32 window_x, s32 window_y, s32 window_width,
std::tuple<float, float> 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.