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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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15
Userland/Libraries/LibGfx/AntiAliasingPainter.cpp
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@ -132,6 +132,14 @@ void Gfx::AntiAliasingPainter::stroke_path(Path const& path, Color color, float
cursor = segment.point();
break;
}
case Segment::Type::CubicBezierCurveTo: {
auto& curve = static_cast<CubicBezierCurveSegment const&>(segment);
auto& through_0 = curve.through_0();
auto& through_1 = curve.through_1();
draw_cubic_bezier_curve(through_0, through_1, cursor, segment.point(), color, thickness);
cursor = segment.point();
break;
}
case Segment::Type::EllipticalArcTo:
auto& arc = static_cast<EllipticalArcSegment const&>(segment);
draw_elliptical_arc(cursor, segment.point(), arc.center(), arc.radii(), arc.x_axis_rotation(), arc.theta_1(), arc.theta_delta(), color, thickness);
@ -154,3 +162,10 @@ void Gfx::AntiAliasingPainter::draw_quadratic_bezier_curve(FloatPoint const& con
draw_line(fp1, fp2, color, thickness, style);
});
}
void Gfx::AntiAliasingPainter::draw_cubic_bezier_curve(const FloatPoint& control_point_0, const FloatPoint& control_point_1, const FloatPoint& p1, const FloatPoint& p2, Color color, float thickness, Painter::LineStyle style)
{
Gfx::Painter::for_each_line_segment_on_cubic_bezier_curve(control_point_0, control_point_1, p1, p2, [&](FloatPoint const& fp1, FloatPoint const& fp2) {
draw_line(fp1, fp2, color, thickness, style);
});
}