mcs/class/System.Drawing/System.Drawing.Drawing2D/Matrix.cs

   1 //
   2 // System.Drawing.Drawing2D.Matrix.cs
   3 //
   4 // Authors:
   5 //   Stefan Maierhofer <sm@cg.tuwien.ac.at>
   6 //   Dennis Hayes (dennish@Raytek.com)
   7 //   Duncan Mak (duncan@ximian.com)
   8 //   Ravindra (rkumar@novell.com)
   9 //
  10 // (C) Ximian, Inc.  http://www.ximian.com
  11 // (C) Novell, Inc.  http://www.novell.com
  12 //
  13
  14 //
  15 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  16 //
  17 // Permission is hereby granted, free of charge, to any person obtaining
  18 // a copy of this software and associated documentation files (the
  19 // "Software"), to deal in the Software without restriction, including
  20 // without limitation the rights to use, copy, modify, merge, publish,
  21 // distribute, sublicense, and/or sell copies of the Software, and to
  22 // permit persons to whom the Software is furnished to do so, subject to
  23 // the following conditions:
  24 //
  25 // The above copyright notice and this permission notice shall be
  26 // included in all copies or substantial portions of the Software.
  27 //
  28 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  29 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  30 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  31 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  32 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  33 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  34 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  35 //
  36
  37 using System;
  38 using System.Drawing;
  39 using System.Runtime.InteropServices;
  40
  41 namespace System.Drawing.Drawing2D
  42 {
  43         public sealed class Matrix : MarshalByRefObject, IDisposable
  44         {
  45                 internal IntPtr nativeMatrix;
  46
  47                 // constructors
  48                 internal Matrix (IntPtr ptr)
  49                 {
  50                         nativeMatrix = ptr;
  51                 }
  52
  53                 public Matrix ()
  54                 {
  55                         Status status = GDIPlus.GdipCreateMatrix (out nativeMatrix);
  56                         GDIPlus.CheckStatus (status);
  57                 }
  58
  59                 public Matrix (Rectangle rect , Point[] plgpts)
  60                 {
  61                         Status status = GDIPlus.GdipCreateMatrix3I (rect, plgpts, out nativeMatrix);
  62                         GDIPlus.CheckStatus (status);
  63                 }
  64
  65                 public Matrix (RectangleF rect , PointF[] pa)
  66                 {
  67                         Status status = GDIPlus.GdipCreateMatrix3 (rect, pa, out nativeMatrix);
  68                         GDIPlus.CheckStatus (status);
  69                 }
  70
  71                 public Matrix (float m11, float m12, float m21, float m22, float dx, float dy)
  72                 {
  73                         Status status = GDIPlus.GdipCreateMatrix2 (m11, m12, m21, m22, dx, dy, out nativeMatrix);
  74                         GDIPlus.CheckStatus (status);
  75                 }
  76
  77                 // properties
  78                 public float[] Elements {
  79                         get {
  80                                 IntPtr tmp = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (float)) * 6);
  81                                 float [] retval = new float [6];
  82
  83                                 Status status = GDIPlus.GdipGetMatrixElements (nativeMatrix, tmp);
  84                                 GDIPlus.CheckStatus (status);
  85
  86                                 Marshal.Copy (tmp, retval, 0, 6);
  87
  88                                 Marshal.FreeHGlobal (tmp);
  89                                 return retval;
  90                         }
  91                 }
  92
  93                 public bool IsIdentity {
  94                         get {
  95                                 bool retval;
  96                                 Status status = GDIPlus.GdipIsMatrixIdentity (nativeMatrix, out retval);
  97                                 GDIPlus.CheckStatus (status);
  98                                 return retval;
  99                         }
 100                 }
 101
 102                 public bool IsInvertible {
 103                         get {
 104                                 bool retval;
 105                                 Status status = GDIPlus.GdipIsMatrixInvertible (nativeMatrix, out retval);
 106                                 GDIPlus.CheckStatus (status);
 107                                 return retval;
 108                         }
 109                 }
 110
 111                 public float OffsetX {
 112                         get {
 113                                 return this.Elements [4];
 114                         }
 115                 }
 116
 117                 public float OffsetY {
 118                         get {
 119                                 return this.Elements [5];
 120                         }
 121                 }
 122
 123                 public Matrix Clone()
 124                 {
 125                         IntPtr retval;
 126                         Status status = GDIPlus.GdipCloneMatrix (nativeMatrix, out retval);
 127                         GDIPlus.CheckStatus (status);
 128                         return new Matrix (retval);
 129                 }
 130
 131
 132                 public void Dispose ()
 133                 {
 134                         Status status = GDIPlus.GdipDeleteMatrix (nativeMatrix);
 135                         GDIPlus.CheckStatus (status);
 136                 }
 137
 138                 public override bool Equals (object obj)
 139                 {
 140                         Matrix m = obj as Matrix;
 141
 142                         if (m != null) {
 143                                 bool retval;
 144                                 Status status = GDIPlus.GdipIsMatrixEqual (nativeMatrix, m.nativeMatrix, out retval);
 145                                 GDIPlus.CheckStatus (status);
 146                                 return retval;
 147
 148                         } else
 149                                 return false;
 150                 }
 151
 152                 ~Matrix()
 153                 {
 154                         Dispose ();
 155                 }
 156
 157                 public override int GetHashCode ()
 158                 {
 159                         return base.GetHashCode ();
 160                 }
 161
 162                 public void Invert ()
 163                 {
 164                         Status status = GDIPlus.GdipInvertMatrix (nativeMatrix);
 165                         GDIPlus.CheckStatus (status);
 166                 }
 167
 168                 public void Multiply (Matrix matrix)
 169                 {
 170                         Multiply (matrix, MatrixOrder.Prepend);
 171                 }
 172
 173                 public void Multiply (Matrix matrix, MatrixOrder order)
 174                 {
 175                         Status status = GDIPlus.GdipMultiplyMatrix (nativeMatrix, matrix.nativeMatrix, order);
 176                         GDIPlus.CheckStatus (status);
 177                 }
 178
 179                 public void Reset()
 180                 {
 181                         Status status = GDIPlus.GdipSetMatrixElements (nativeMatrix, 1, 0, 0, 1, 0, 0);
 182                         GDIPlus.CheckStatus (status);
 183                 }
 184
 185                 public void Rotate (float angle)
 186                 {
 187                         Rotate (angle, MatrixOrder.Prepend);
 188                 }
 189
 190                 public void Rotate (float angle, MatrixOrder order)
 191                 {
 192                         Status status = GDIPlus.GdipRotateMatrix (nativeMatrix, angle, order);
 193                         GDIPlus.CheckStatus (status);
 194                 }
 195
 196                 public void RotateAt (float angle, PointF point)
 197                 {
 198                         RotateAt (angle, point, MatrixOrder.Prepend);
 199                 }
 200
 201                 public void RotateAt (float angle, PointF point, MatrixOrder order)
 202                 {
 203                         angle *= (float) (Math.PI / 180.0);  // degrees to radians
 204                         float cos = (float) Math.Cos (angle);
 205                         float sin = (float) Math.Sin (angle);
 206                         float e4 = -point.X * cos + point.Y * sin + point.X;
 207                         float e5 = -point.X * sin - point.Y * cos + point.Y;
 208                         float[] m = this.Elements;
 209
 210                         Status status;
 211
 212                         if (order == MatrixOrder.Prepend)
 213                                 status = GDIPlus.GdipSetMatrixElements (nativeMatrix,
 214                                                                 cos * m[0] + sin * m[2],
 215                                                                 cos * m[1] + sin * m[3],
 216                                                                 -sin * m[0] + cos * m[2],
 217                                                                 -sin * m[1] + cos * m[3],
 218                                                                 e4 * m[0] + e5 * m[2] + m[4],
 219                                                                 e4 * m[1] + e5 * m[3] + m[5]);
 220                         else
 221                                 status = GDIPlus.GdipSetMatrixElements (nativeMatrix,
 222                                                                 m[0] * cos + m[1] * -sin,
 223                                                                 m[0] * sin + m[1] * cos,
 224                                                                 m[2] * cos + m[3] * -sin,
 225                                                                 m[2] * sin + m[3] * cos,
 226                                                                 m[4] * cos + m[5] * -sin + e4,
 227                                                                 m[4] * sin + m[5] * cos + e5);
 228                         GDIPlus.CheckStatus (status);
 229                 }
 230
 231                 public void Scale (float scaleX, float scaleY)
 232                 {
 233                         Scale (scaleX, scaleY, MatrixOrder.Prepend);
 234                 }
 235
 236                 public void Scale (float scaleX, float scaleY, MatrixOrder order)
 237                 {
 238                         Status status = GDIPlus.GdipScaleMatrix (nativeMatrix, scaleX, scaleY, order);
 239                         GDIPlus.CheckStatus (status);
 240                 }
 241
 242                 public void Shear (float shearX, float shearY)
 243                 {
 244                         Shear (shearX, shearY, MatrixOrder.Prepend);
 245                 }
 246
 247                 public void Shear (float shearX, float shearY, MatrixOrder order)
 248                 {
 249                         Status status = GDIPlus.GdipShearMatrix (nativeMatrix, shearX, shearY, order);
 250                         GDIPlus.CheckStatus (status);
 251                 }
 252
 253                 public void TransformPoints (Point[] pts)
 254                 {
 255                         Status status = GDIPlus.GdipTransformMatrixPointsI (nativeMatrix, pts, pts.Length);
 256                         GDIPlus.CheckStatus (status);
 257                 }
 258
 259                 public void TransformPoints (PointF[] pts)
 260                 {
 261                         Status status = GDIPlus.GdipTransformMatrixPoints (nativeMatrix, pts, pts.Length);
 262                         GDIPlus.CheckStatus (status);
 263                 }
 264
 265                 public void TransformVectors (Point[] pts)
 266                 {
 267                         Status status = GDIPlus.GdipVectorTransformMatrixPointsI (nativeMatrix, pts, pts.Length);
 268                         GDIPlus.CheckStatus (status);
 269                 }
 270
 271                 public void TransformVectors (PointF[] pts)
 272                 {
 273                         Status status = GDIPlus.GdipVectorTransformMatrixPoints (nativeMatrix, pts, pts.Length);
 274                         GDIPlus.CheckStatus (status);
 275                 }
 276
 277                 public void Translate (float offsetX, float offsetY)
 278                 {
 279                         Translate (offsetX, offsetY, MatrixOrder.Prepend);
 280                 }
 281
 282                 public void Translate (float offsetX, float offsetY, MatrixOrder order)
 283                 {
 284                         Status status = GDIPlus.GdipTranslateMatrix (nativeMatrix, offsetX, offsetY, order);
 285                         GDIPlus.CheckStatus (status);
 286                 }
 287
 288                 public void VectorTransformPoints (Point[] pts)
 289                 {
 290                         TransformVectors (pts);
 291                 }
 292
 293                 internal IntPtr NativeObject
 294                 {
 295                         get{
 296                                 return nativeMatrix;
 297                         }
 298                         set     {
 299                                 nativeMatrix = value;
 300                         }
 301                 }
 302         }
 303 }