#region LICENSE
/*
* Copyright (C) 2004 - 2007 David Hudson (jendave@yahoo.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#endregion LICENSE
using System;
using System.Collections;
using System.Drawing;
using System.Globalization;
using Tao.Sdl;
using SdlDotNet.Core;
namespace SdlDotNet.Graphics.Primitives{
/// <summary>
/// Ellipse Primitive
/// </summary>
public struct Ellipse : IPrimitive
{
short x;
short y;
short radiusX;
short radiusY;
/// <summary>
/// Constructor
/// </summary>
/// <param name="positionX">X coordinate of center</param>
/// <param name="positionY">Y coordinate of center</param>
/// <param name="radiusX">Radius on X axis</param>
/// <param name="radiusY">Radius on Y axis</param>
public Ellipse(short positionX, short positionY, short radiusX, short radiusY)
{
this.x = positionX;
this.y = positionY;
this.radiusX = radiusX;
this.radiusY = radiusY;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="point">Center</param>
/// <param name="size">Width and height of ellipse</param>
public Ellipse(Point point, Size size)
{
this.x = (short)point.X;
this.y = (short)point.Y;
this.radiusX = (short)size.Width;
this.radiusY = (short)size.Height;
}
/// <summary>
/// Center of ellipse
/// </summary>
public Point Center
{
get
{
return new Point(this.x, this.y);
}
set
{
this.x = (short)value.X;
this.y = (short)value.Y;
}
}
/// <summary>
/// Size struct representing width and height of ellipse
/// </summary>
public Size Size
{
get
{
return new Size(this.radiusX, this.radiusY);
}
set
{
this.radiusX = (short)value.Width;
this.radiusY = (short)value.Height;
}
}
/// <summary>
/// X position of center of ellipse
/// </summary>
public short PositionX
{
get
{
return this.x;
}
set
{
this.x = value;
}
}
/// <summary>
/// Y position of center of ellipse
/// </summary>
public short PositionY
{
get
{
return this.y;
}
set
{
this.y = value;
}
}
/// <summary>
/// Width of ellipse
/// </summary>
public short RadiusX
{
get
{
return this.radiusX;
}
set
{
this.radiusX = value;
}
}
/// <summary>
/// Height of ellipse
/// </summary>
public short RadiusY
{
get
{
return this.radiusY;
}
set
{
this.radiusY = value;
}
}
/// <summary>
/// Draw filled primitive onto surface
/// </summary>
/// <param name="surface">Surface to draw to</param>
/// <param name="color">Color to fill primitive</param>
/// <param name="antiAlias">antialias primitive</param>
/// <param name="fill">fill primitive with color</param>
public void Draw(Surface surface, System.Drawing.Color color, bool antiAlias, bool fill)
{
if (surface == null)
{
throw new ArgumentNullException("surface");
}
if (fill)
{
int result = SdlGfx.filledEllipseRGBA(surface.Handle, this.PositionX, this.PositionY, this.RadiusX, this.RadiusY, color.R, color.G, color.B,
color.A);
GC.KeepAlive(this);
if (result != (int)SdlFlag.Success)
{
throw SdlException.Generate();
}
}
else
{
int result = 0;
if (antiAlias)
{
result = SdlGfx.aaellipseRGBA(
surface.Handle, this.PositionX, this.PositionY,
this.RadiusX, this.RadiusY,
color.R, color.G, color.B,
color.A);
GC.KeepAlive(this);
}
else
{
result = SdlGfx.ellipseRGBA(
surface.Handle, this.PositionX, this.PositionY,
this.RadiusX, this.RadiusY,
color.R, color.G, color.B,
color.A);
GC.KeepAlive(this);
}
if (result != (int)SdlFlag.Success)
{
throw SdlException.Generate();
}
}
}
/// <summary>
/// Draw primitive onto surface
/// </summary>
/// <param name="surface">surface to draw to</param>
/// <param name="color">Color of primitive</param>
/// <param name="antiAlias">Antialias primitive</param>
public void Draw(Surface surface, System.Drawing.Color color, bool antiAlias)
{
this.Draw(surface, color, antiAlias, false);
}
/// <summary>
/// Draw primitive onto surface
/// </summary>
/// <param name="surface">surface to draw to</param>
/// <param name="color">Color of primitive</param>
public void Draw(Surface surface, System.Drawing.Color color)
{
Draw(surface, color, true, false);
}
/// <summary>
/// String representation of ellipse
/// </summary>
/// <returns>string representation of ellipse</returns>
public override string ToString()
{
return String.Format(
CultureInfo.CurrentCulture,
"({0}, {1}, {2}, {3})", x, y, radiusX, radiusY);
}
/// <summary>
/// Equals operator
/// </summary>
/// <param name="obj">Ellipse to compare</param>
/// <returns>True if ellipses are equal</returns>
public override bool Equals(object obj)
{
if (obj == null)
{
throw new ArgumentNullException("obj");
}
if (obj.GetType() != typeof(Ellipse))
return false;
Ellipse e = (Ellipse)obj;
return (
(this.x == e.x) &&
(this.y == e.y) &&
(this.radiusX == e.radiusX) &&
(this.radiusY == e.radiusY)
);
}
/// <summary>
/// Equals operator
/// </summary>
/// <param name="e1">Ellipse to compare</param>
/// <param name="e2">Ellipse to compare</param>
/// <returns>True if ellipses are equal</returns>
public static bool operator ==(Ellipse e1, Ellipse e2)
{
return (
(e1.x == e2.x) &&
(e1.y == e2.y) &&
(e1.radiusX == e2.radiusX) &&
(e1.radiusY == e2.radiusY)
);
}
/// <summary>
/// Not equals operator
/// </summary>
/// <param name="e1">Ellipse to compare</param>
/// <param name="e2">Ellipse to compare</param>
/// <returns>True if ellipses are not equal</returns>
public static bool operator !=(Ellipse e1, Ellipse e2)
{
return !(e1 == e2);
}
/// <summary>
/// Hash code
/// </summary>
/// <returns>hash code</returns>
public override int GetHashCode()
{
return x ^ y ^ radiusX ^ radiusY;
}
}
}
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