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LibGfx: Implement cubic bezier curves by splitting them to subcurves

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This makes them significantly more nicer-looking, and fixes a FIXME :^)
This commit is contained in:
Ali Mohammad Pur 2021-09-17 18:42:30 +04:30 • committed by Ali Mohammad Pur
parent 02d949cfb6
commit 433725fef2
6 changed files with 145 additions and 12 deletions
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28
Userland/Libraries/LibGfx/Path.h
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@ -24,6 +24,7 @@ public:
MoveTo,
LineTo,
QuadraticBezierCurveTo,
CubicBezierCurveTo,
EllipticalArcTo,
};
@ -83,6 +84,27 @@ private:
FloatPoint m_through;
};
class CubicBezierCurveSegment final : public Segment {
public:
CubicBezierCurveSegment(const FloatPoint& point, const FloatPoint& through_0, const FloatPoint& through_1)
: Segment(point)
, m_through_0(through_0)
, m_through_1(through_1)
{
}
virtual ~CubicBezierCurveSegment() override = default;
const FloatPoint& through_0() const { return m_through_0; }
const FloatPoint& through_1() const { return m_through_1; }
private:
virtual Type type() const override { return Segment::Type::CubicBezierCurveTo; }
FloatPoint m_through_0;
FloatPoint m_through_1;
};
class EllipticalArcSegment final : public Segment {
public:
EllipticalArcSegment(const FloatPoint& point, const FloatPoint& center, const FloatPoint radii, float x_axis_rotation, float theta_1, float theta_delta)
@ -134,7 +156,11 @@ public:
invalidate_split_lines();
}
void cubic_bezier_curve_to(FloatPoint const& c1, FloatPoint const& c2, FloatPoint const& p2);
void cubic_bezier_curve_to(FloatPoint const& c1, FloatPoint const& c2, FloatPoint const& p2)
{
append_segment<CubicBezierCurveSegment>(p2, c1, c2);
invalidate_split_lines();
}
void elliptical_arc_to(const FloatPoint& point, const FloatPoint& radii, double x_axis_rotation, bool large_arc, bool sweep);
void arc_to(const FloatPoint& point, float radius, bool large_arc, bool sweep)