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LibGfx: Implement AntiAliasingPainter::draw_ellipse()
This commit adds draw_ellipse() and moves the shared code for circles and ellipses to draw_ellipse_part(). draw_ellipse_part() can draw an entire circle in one call using 8-way symmetry and an ellipse in two calls using 4-way symmetry.
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3 changed files with 113 additions and 36 deletions
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@ -28,11 +28,23 @@ public:
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void translate(float dx, float dy) { m_transform.translate(dx, dy); }
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void translate(FloatPoint const& delta) { m_transform.translate(delta); }
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void draw_circle(IntPoint center, int radius, Color);
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void draw_circle(IntPoint const& center, int radius, Color);
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void draw_ellipse(IntRect const& a_rect, Color);
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void fill_rect_with_rounded_corners(IntRect const&, Color, int radius);
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void fill_rect_with_rounded_corners(IntRect const&, Color, int top_left_radius, int top_right_radius, int bottom_right_radius, int bottom_left_radius);
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private:
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struct Range {
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int min;
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int max;
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inline bool contains_inclusive(int n) const
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{
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return n >= min && n <= max;
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}
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};
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Range draw_ellipse_part(IntPoint a_rect, int radius_a, int radius_b, Color, bool flip_x_and_y, Optional<Range> x_clip);
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enum class AntiAliasPolicy {
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OnlyEnds,
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Full,
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