[C#/WINFORM] GraphicsPath 클래스 : 라운드 사각형 패스 구하기

using System.Drawing;
using System.Drawing.Drawing2D;

#region 라운드 사각형 패스 구하기 - GetRoundedRectanglePath(rectangle, radiusX, radiusY, roundUpperLeft, roundUpperRight, roundLowerRight, roundLowerLeft)

/// <summary>
/// 라운드 사각형 패스 구하기
/// </summary>
/// <param name="rectangle">사각형</param>
/// <param name="radiusX">반경 X</param>
/// <param name="radiusY">반경 Y</param>
/// <param name="roundUpperLeft">좌상단 라운드 여부</param>
/// <param name="roundUpperRight">우상단 라운드 여부</param>
/// <param name="roundLowerRight">우하단 라운드 여부</param>
/// <param name="roundLowerLeft">좌하단 라운드 여부</param>
/// <returns>라운드 사각형 패스</returns>
public GraphicsPath GetRoundedRectanglePath
(
    RectangleF rectangle,
    float      radiusX,
    float      radiusY,
    bool       roundUpperLeft,
    bool       roundUpperRight,
    bool       roundLowerRight,
    bool       roundLowerLeft
)
{
    PointF point1;
    PointF point2;

    GraphicsPath path = new GraphicsPath();

    if(roundUpperLeft)
    {
        RectangleF cornerRectangle = new RectangleF
        (
            rectangle.X,
            rectangle.Y,
            2 * radiusX,
            2 * radiusY
        );

        path.AddArc(cornerRectangle, 180, 90);

        point1 = new PointF(rectangle.X + radiusX, rectangle.Y);
    }
    else
    {
        point1 = new PointF(rectangle.X, rectangle.Y);
    }

    if(roundUpperRight)
    {
        point2 = new PointF(rectangle.Right - radiusX, rectangle.Y);
    }
    else
    {
        point2 = new PointF(rectangle.Right, rectangle.Y);
    }

    path.AddLine(point1, point2);

    if(roundUpperRight)
    {
        RectangleF cornerRectangle = new RectangleF
        (
            rectangle.Right - 2 * radiusX,
            rectangle.Y,
            2 * radiusX,
            2 * radiusY
        );

        path.AddArc(cornerRectangle, 270, 90);

        point1 = new PointF(rectangle.Right, rectangle.Y + radiusY);
    }
    else
    {
        point1 = new PointF(rectangle.Right, rectangle.Y);
    }

    if(roundLowerRight)
    {
        point2 = new PointF(rectangle.Right, rectangle.Bottom - radiusY);
    }
    else
    {
        point2 = new PointF(rectangle.Right, rectangle.Bottom);
    }

    path.AddLine(point1, point2);

    if(roundLowerRight)
    {
        RectangleF cornerRectangle = new RectangleF
        (
            rectangle.Right  - 2 * radiusX,
            rectangle.Bottom - 2 * radiusY,
            2 * radiusX,
            2 * radiusY
        );

        path.AddArc(cornerRectangle, 0, 90);

        point1 = new PointF(rectangle.Right - radiusX, rectangle.Bottom);
    }
    else
    {
        point1 = new PointF(rectangle.Right, rectangle.Bottom);
    }

    if(roundLowerLeft)
    {
        point2 = new PointF(rectangle.X + radiusX, rectangle.Bottom);
    }
    else
    {
        point2 = new PointF(rectangle.X, rectangle.Bottom);
    }

    path.AddLine(point1, point2);

    if(roundLowerLeft)
    {
        RectangleF cornerRectangle = new RectangleF
        (
            rectangle.X,
            rectangle.Bottom - 2 * radiusY,
            2 * radiusX,
            2 * radiusY
        );

        path.AddArc(cornerRectangle, 90, 90);

        point1 = new PointF(rectangle.X, rectangle.Bottom - radiusY);
    }
    else
    {
        point1 = new PointF(rectangle.X, rectangle.Bottom);
    }

    if(roundUpperLeft)
    {
        point2 = new PointF(rectangle.X, rectangle.Y + radiusY);
    }
    else
    {
        point2 = new PointF(rectangle.X, rectangle.Y);
    }

    path.AddLine(point1, point2);

    path.CloseFigure();

    return path;
}

#endregion