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GPU: Use triangle area for ticks rather than bbox

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Fixes slow transitions in Tales of Phantasia.
This commit is contained in:
Connor McLaughlin
2020-10-03 14:10:54 +10:00
parent 45dd80b6a6
commit 50b025c75a
3 changed files with 42 additions and 27 deletions
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44
src/core/gpu.h
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@ -421,6 +421,22 @@ protected:
/// Returns true if the drawing area is valid (i.e. left <= right, top <= bottom).
ALWAYS_INLINE bool IsDrawingAreaIsValid() const { return m_drawing_area.Valid(); }
/// Clamps the specified coordinates to the drawing area.
ALWAYS_INLINE void ClampCoordinatesToDrawingArea(s32* x, s32* y)
{
const s32 x_value = *x;
if (x_value < static_cast<s32>(m_drawing_area.left))
*x = m_drawing_area.left;
else if (x_value >= static_cast<s32>(m_drawing_area.right))
*x = m_drawing_area.right - 1;
const s32 y_value = *y;
if (y_value < static_cast<s32>(m_drawing_area.top))
*y = m_drawing_area.top;
else if (y_value >= static_cast<s32>(m_drawing_area.bottom))
*y = m_drawing_area.bottom - 1;
}
void AddCommandTicks(TickCount ticks);
void WriteGP1(u32 value);
@ -439,19 +455,25 @@ protected:
virtual void UpdateDisplay();
virtual void DrawRendererStats(bool is_idle_frame);
// These are **very** approximate.
ALWAYS_INLINE void AddDrawTriangleTicks(u32 width, u32 height, bool shaded, bool textured, bool semitransparent)
ALWAYS_INLINE void AddDrawTriangleTicks(s32 x1, s32 y1, s32 x2, s32 y2, s32 x3, s32 y3, bool shaded, bool textured,
bool semitransparent)
{
const u32 average_width = ((width + 2) / 3);
u32 ticks_per_row = average_width;
if (textured)
ticks_per_row += average_width;
if (semitransparent || m_GPUSTAT.check_mask_before_draw)
ticks_per_row += (average_width + 1u) / 2u;
if (m_GPUSTAT.SkipDrawingToActiveField())
height = std::max<u32>(height / 2, 1u);
// This will not produce the correct results for triangles which are partially outside the clip area.
// However, usually it'll undershoot not overshoot. If we wanted to make this more accurate, we'd need to intersect
// the edges with the clip rectangle.
ClampCoordinatesToDrawingArea(&x1, &y1);
ClampCoordinatesToDrawingArea(&x2, &y2);
ClampCoordinatesToDrawingArea(&x3, &y3);
AddCommandTicks(ticks_per_row * height);
TickCount pixels = std::abs((x1 * y2 + x2 * y3 + x3 * y1 - x1 * y3 - x2 * y1 - x3 * y2) / 2);
if (textured)
pixels += pixels;
if (semitransparent || m_GPUSTAT.check_mask_before_draw)
pixels += (pixels + 1) / 2;
if (m_GPUSTAT.SkipDrawingToActiveField())
pixels /= 2;
AddCommandTicks(pixels);
}
ALWAYS_INLINE void AddDrawRectangleTicks(u32 width, u32 height, bool textured, bool semitransparent)
{