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LibGfx: Track edge extent in EdgeFlagPathRasterizer

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This allows avoiding accumulating values we know will be zero, this is
not a huge speedup but does shave off a few %.
This commit is contained in:
MacDue 2023-08-06 14:15:04 +01:00 • committed by Andreas Kling
parent ec24d7555a
commit 2a914a7a59
2 changed files with 44 additions and 24 deletions
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18
Userland/Libraries/LibGfx/EdgeFlagPathRasterizer.h
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@ -160,10 +160,22 @@ private:
return (coverage << alpha_shift) - 1;
}
struct EdgeExtent {
int min_x;
int max_x;
template<typename T>
void memset_extent(T* data, int value)
{
if (min_x <= max_x)
memset(data + min_x, value, (max_x - min_x + 1) * sizeof(T));
}
};
void fill_internal(Painter&, Path const&, auto color_or_function, Painter::WindingRule, FloatPoint offset);
Detail::Edge* plot_edges_for_scanline(int scanline, auto plot_edge, Detail::Edge* active_edges = nullptr);
void accumulate_even_odd_scanline(Painter&, int scanline, auto& color_or_function);
void accumulate_non_zero_scanline(Painter&, int scanline, auto& color_or_function);
Detail::Edge* plot_edges_for_scanline(int scanline, auto plot_edge, EdgeExtent&, Detail::Edge* active_edges = nullptr);
void accumulate_even_odd_scanline(Painter&, int scanline, EdgeExtent, auto& color_or_function);
void accumulate_non_zero_scanline(Painter&, int scanline, EdgeExtent, auto& color_or_function);
Color scanline_color(int scanline, int offset, u8 alpha, auto& color_or_function);
void write_pixel(Painter&, int scanline, int offset, SampleType sample, auto& color_or_function);