332 lines
11 KiB
C#
332 lines
11 KiB
C#
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//
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// System.Drawing.Drawing2D.Matrix.cs
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//
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// Authors:
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// Stefan Maierhofer <sm@cg.tuwien.ac.at>
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// Dennis Hayes (dennish@Raytek.com)
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// Duncan Mak (duncan@ximian.com)
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// Ravindra (rkumar@novell.com)
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//
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// (C) Ximian, Inc. http://www.ximian.com
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// Copyright (C) 2004, 2006 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Runtime.InteropServices;
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namespace System.Drawing.Drawing2D
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{
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public sealed class Matrix : MarshalByRefObject, IDisposable
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{
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internal IntPtr nativeMatrix;
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// constructors
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internal Matrix (IntPtr ptr)
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{
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nativeMatrix = ptr;
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}
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public Matrix ()
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{
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Status status = GDIPlus.GdipCreateMatrix (out nativeMatrix);
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GDIPlus.CheckStatus (status);
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}
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public Matrix (Rectangle rect, Point[] plgpts)
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{
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if (plgpts == null)
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throw new ArgumentNullException ("plgpts");
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if (plgpts.Length != 3)
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throw new ArgumentException ("plgpts");
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Status status = GDIPlus.GdipCreateMatrix3I (ref rect, plgpts, out nativeMatrix);
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GDIPlus.CheckStatus (status);
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}
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public Matrix (RectangleF rect, PointF[] plgpts)
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{
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if (plgpts == null)
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throw new ArgumentNullException ("plgpts");
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if (plgpts.Length != 3)
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throw new ArgumentException ("plgpts");
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Status status = GDIPlus.GdipCreateMatrix3 (ref rect, plgpts, out nativeMatrix);
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GDIPlus.CheckStatus (status);
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}
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public Matrix (float m11, float m12, float m21, float m22, float dx, float dy)
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{
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Status status = GDIPlus.GdipCreateMatrix2 (m11, m12, m21, m22, dx, dy, out nativeMatrix);
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GDIPlus.CheckStatus (status);
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}
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// properties
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public float[] Elements {
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get {
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float [] retval = new float [6];
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IntPtr tmp = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (float)) * 6);
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try {
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Status status = GDIPlus.GdipGetMatrixElements (nativeMatrix, tmp);
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GDIPlus.CheckStatus (status);
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Marshal.Copy (tmp, retval, 0, 6);
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}
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finally {
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Marshal.FreeHGlobal (tmp);
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}
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return retval;
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}
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}
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public bool IsIdentity {
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get {
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bool retval;
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Status status = GDIPlus.GdipIsMatrixIdentity (nativeMatrix, out retval);
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GDIPlus.CheckStatus (status);
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return retval;
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}
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}
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public bool IsInvertible {
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get {
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bool retval;
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Status status = GDIPlus.GdipIsMatrixInvertible (nativeMatrix, out retval);
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GDIPlus.CheckStatus (status);
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return retval;
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}
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}
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public float OffsetX {
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get {
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return this.Elements [4];
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}
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}
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public float OffsetY {
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get {
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return this.Elements [5];
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}
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}
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public Matrix Clone()
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{
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IntPtr retval;
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Status status = GDIPlus.GdipCloneMatrix (nativeMatrix, out retval);
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GDIPlus.CheckStatus (status);
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return new Matrix (retval);
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}
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public void Dispose ()
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{
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if (nativeMatrix != IntPtr.Zero) {
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Status status = GDIPlus.GdipDeleteMatrix (nativeMatrix);
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GDIPlus.CheckStatus (status);
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nativeMatrix = IntPtr.Zero;
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}
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GC.SuppressFinalize (this);
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}
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public override bool Equals (object obj)
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{
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Matrix m = obj as Matrix;
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if (m != null) {
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bool retval;
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Status status = GDIPlus.GdipIsMatrixEqual (nativeMatrix, m.nativeMatrix, out retval);
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GDIPlus.CheckStatus (status);
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return retval;
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} else
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return false;
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}
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~Matrix()
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{
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Dispose ();
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}
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public override int GetHashCode ()
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{
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return base.GetHashCode ();
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}
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public void Invert ()
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{
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Status status = GDIPlus.GdipInvertMatrix (nativeMatrix);
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GDIPlus.CheckStatus (status);
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}
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public void Multiply (Matrix matrix)
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{
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Multiply (matrix, MatrixOrder.Prepend);
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}
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public void Multiply (Matrix matrix, MatrixOrder order)
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{
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if (matrix == null)
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throw new ArgumentNullException ("matrix");
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Status status = GDIPlus.GdipMultiplyMatrix (nativeMatrix, matrix.nativeMatrix, order);
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GDIPlus.CheckStatus (status);
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}
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public void Reset()
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{
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Status status = GDIPlus.GdipSetMatrixElements (nativeMatrix, 1, 0, 0, 1, 0, 0);
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GDIPlus.CheckStatus (status);
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}
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public void Rotate (float angle)
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{
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Rotate (angle, MatrixOrder.Prepend);
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}
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public void Rotate (float angle, MatrixOrder order)
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{
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Status status = GDIPlus.GdipRotateMatrix (nativeMatrix, angle, order);
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GDIPlus.CheckStatus (status);
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}
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public void RotateAt (float angle, PointF point)
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{
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RotateAt (angle, point, MatrixOrder.Prepend);
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}
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public void RotateAt (float angle, PointF point, MatrixOrder order)
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{
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if ((order < MatrixOrder.Prepend) || (order > MatrixOrder.Append))
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throw new ArgumentException ("order");
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angle *= (float) (Math.PI / 180.0); // degrees to radians
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float cos = (float) Math.Cos (angle);
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float sin = (float) Math.Sin (angle);
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float e4 = -point.X * cos + point.Y * sin + point.X;
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float e5 = -point.X * sin - point.Y * cos + point.Y;
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float[] m = this.Elements;
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Status status;
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if (order == MatrixOrder.Prepend)
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status = GDIPlus.GdipSetMatrixElements (nativeMatrix,
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cos * m[0] + sin * m[2],
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cos * m[1] + sin * m[3],
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-sin * m[0] + cos * m[2],
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-sin * m[1] + cos * m[3],
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e4 * m[0] + e5 * m[2] + m[4],
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e4 * m[1] + e5 * m[3] + m[5]);
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else
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status = GDIPlus.GdipSetMatrixElements (nativeMatrix,
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m[0] * cos + m[1] * -sin,
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m[0] * sin + m[1] * cos,
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m[2] * cos + m[3] * -sin,
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m[2] * sin + m[3] * cos,
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m[4] * cos + m[5] * -sin + e4,
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m[4] * sin + m[5] * cos + e5);
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GDIPlus.CheckStatus (status);
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}
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public void Scale (float scaleX, float scaleY)
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{
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Scale (scaleX, scaleY, MatrixOrder.Prepend);
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}
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public void Scale (float scaleX, float scaleY, MatrixOrder order)
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{
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Status status = GDIPlus.GdipScaleMatrix (nativeMatrix, scaleX, scaleY, order);
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GDIPlus.CheckStatus (status);
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}
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public void Shear (float shearX, float shearY)
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{
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Shear (shearX, shearY, MatrixOrder.Prepend);
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}
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public void Shear (float shearX, float shearY, MatrixOrder order)
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{
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Status status = GDIPlus.GdipShearMatrix (nativeMatrix, shearX, shearY, order);
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GDIPlus.CheckStatus (status);
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}
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public void TransformPoints (Point[] pts)
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{
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if (pts == null)
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throw new ArgumentNullException ("pts");
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Status status = GDIPlus.GdipTransformMatrixPointsI (nativeMatrix, pts, pts.Length);
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GDIPlus.CheckStatus (status);
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}
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public void TransformPoints (PointF[] pts)
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{
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if (pts == null)
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throw new ArgumentNullException ("pts");
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Status status = GDIPlus.GdipTransformMatrixPoints (nativeMatrix, pts, pts.Length);
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GDIPlus.CheckStatus (status);
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}
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public void TransformVectors (Point[] pts)
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{
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if (pts == null)
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throw new ArgumentNullException ("pts");
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Status status = GDIPlus.GdipVectorTransformMatrixPointsI (nativeMatrix, pts, pts.Length);
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GDIPlus.CheckStatus (status);
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}
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public void TransformVectors (PointF[] pts)
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{
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if (pts == null)
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throw new ArgumentNullException ("pts");
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Status status = GDIPlus.GdipVectorTransformMatrixPoints (nativeMatrix, pts, pts.Length);
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GDIPlus.CheckStatus (status);
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}
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public void Translate (float offsetX, float offsetY)
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{
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Translate (offsetX, offsetY, MatrixOrder.Prepend);
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}
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public void Translate (float offsetX, float offsetY, MatrixOrder order)
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{
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Status status = GDIPlus.GdipTranslateMatrix (nativeMatrix, offsetX, offsetY, order);
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GDIPlus.CheckStatus (status);
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}
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public void VectorTransformPoints (Point[] pts)
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{
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TransformVectors (pts);
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}
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internal IntPtr NativeObject
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{
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get{
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return nativeMatrix;
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}
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set {
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nativeMatrix = value;
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}
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}
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}
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}
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