2 // System.Drawing.Drawing2D.Matrix.cs
\r
5 // Stefan Maierhofer <sm@cg.tuwien.ac.at>
\r
6 // Dennis Hayes (dennish@Raytek.com)
\r
7 // Duncan Mak (duncan@ximian.com)
\r
9 // (C) Ximian, Inc. http://www.ximian.com
\r
13 using System.Drawing;
\r
14 using System.Runtime.InteropServices;
\r
16 namespace System.Drawing.Drawing2D
\r
18 public sealed class Matrix : MarshalByRefObject, IDisposable
\r
20 internal IntPtr nativeMatrix;
\r
23 internal Matrix (IntPtr ptr)
\r
30 Status s = GDIPlus.GdipCreateMatrix (out nativeMatrix);
\r
33 public Matrix (Rectangle rect , Point[] plgpts)
\r
35 GpRect rectangle = new GpRect (rect);
\r
37 GDIPlus.GdipCreateMatrix3I (rectangle, plgpts, out nativeMatrix);
\r
40 public Matrix (RectangleF rect , PointF[] pa)
\r
42 GpRectF rectangle = new GpRectF (rect);
\r
44 GDIPlus.GdipCreateMatrix3 (rectangle, pa, out nativeMatrix);
\r
47 public Matrix (float m11, float m12, float m21, float m22, float dx, float dy)
\r
49 GDIPlus.GdipCreateMatrix2 (m11, m12, m21, m22, dx, dy, out nativeMatrix);
\r
53 public float[] Elements {
\r
55 IntPtr tmp = Marshal.AllocHGlobal (8 * 6);
\r
57 Status s = GDIPlus.GdipGetMatrixElements (nativeMatrix, tmp);
\r
59 float [] retval = new float [6];
\r
61 Marshal.Copy (tmp, retval, 0, 6);
\r
63 Marshal.FreeHGlobal (tmp);
\r
68 public bool IsIdentity {
\r
71 GDIPlus.GdipIsMatrixIdentity (nativeMatrix, out retval);
\r
77 public bool IsInvertible {
\r
80 GDIPlus.GdipIsMatrixInvertible (nativeMatrix, out retval);
\r
86 public float OffsetX {
\r
88 return this.Elements [4];
\r
92 public float OffsetY {
\r
94 return this.Elements [5];
\r
98 public Matrix Clone()
\r
101 Status s = GDIPlus.GdipCloneMatrix (nativeMatrix, out retval);
\r
102 return new Matrix (retval);
\r
106 public void Dispose ()
\r
108 GDIPlus.GdipDeleteMatrix (nativeMatrix);
\r
111 public override bool Equals (object obj)
\r
113 Matrix m = obj as Matrix;
\r
117 GDIPlus.GdipIsMatrixEqual (nativeMatrix, m.nativeMatrix, out retval);
\r
130 public override int GetHashCode ()
\r
132 return base.GetHashCode ();
\r
135 public void Invert ()
\r
137 GDIPlus.GdipInvertMatrix (nativeMatrix);
\r
140 public void Multiply (Matrix matrix)
\r
142 Multiply (matrix, MatrixOrder.Prepend);
\r
145 public void Multiply (Matrix matrix, MatrixOrder order)
\r
147 GDIPlus.GdipMultiplyMatrix (nativeMatrix, matrix.nativeMatrix, order);
\r
150 public void Reset()
\r
152 GDIPlus.GdipSetMatrixElements (nativeMatrix, 1, 0, 0, 1, 0, 0);
\r
155 public override string ToString ()
\r
157 float [] elements = this.Elements;
\r
159 System.Text.StringBuilder sb = new System.Text.StringBuilder ();
\r
162 sb.Append (elements [0] + " ");
\r
163 sb.Append (elements [1] + " ");
\r
164 sb.Append (elements [2] + " ");
\r
165 sb.Append (elements [3] + " ");
\r
166 sb.Append (elements [4] + " ");
\r
167 sb.Append (elements [5] + ")");
\r
168 return sb.ToString ();
\r
171 public void Rotate (float angle)
\r
173 Rotate (angle, MatrixOrder.Prepend);
\r
176 public void Rotate (float angle, MatrixOrder order)
\r
178 GDIPlus.GdipRotateMatrix (nativeMatrix, angle, order);
\r
181 public void RotateAt (float angle, PointF point)
\r
183 RotateAt (angle, point, MatrixOrder.Prepend);
\r
186 public void RotateAt (float angle, PointF point, MatrixOrder order)
\r
188 angle *= (float) (Math.PI / 180.0); // degrees to radians
\r
189 float cos = (float) Math.Cos (angle);
\r
190 float sin = (float) Math.Sin (angle);
\r
191 float e4 = -point.X * cos + point.Y * sin + point.X;
\r
192 float e5 = -point.X * sin - point.Y * cos + point.Y;
\r
193 float[] m = this.Elements;
\r
195 if (order == MatrixOrder.Prepend)
\r
196 GDIPlus.GdipSetMatrixElements (nativeMatrix,
\r
197 cos * m[0] + sin * m[2],
\r
198 cos * m[1] + sin * m[3],
\r
199 -sin * m[0] + cos * m[2],
\r
200 -sin * m[1] + cos * m[3],
\r
201 e4 * m[0] + e5 * m[2] + m[4],
\r
202 e4 * m[1] + e5 * m[3] + m[5]);
\r
204 GDIPlus.GdipSetMatrixElements (nativeMatrix,
\r
205 m[0] * cos + m[1] * -sin,
\r
206 m[0] * sin + m[1] * cos,
\r
207 m[2] * cos + m[3] * -sin,
\r
208 m[2] * sin + m[3] * cos,
\r
209 m[4] * cos + m[5] * -sin + e4,
\r
210 m[4] * sin + m[5] * cos + e5);
\r
213 public void Scale (float scaleX, float scaleY)
\r
215 Scale (scaleX, scaleY, MatrixOrder.Prepend);
\r
218 public void Scale (float scaleX, float scaleY, MatrixOrder order)
\r
220 GDIPlus.GdipScaleMatrix (nativeMatrix, scaleX, scaleY, order);
\r
223 public void Shear (float shearX, float shearY)
\r
225 Shear (shearX, shearY, MatrixOrder.Prepend);
\r
228 public void Shear (float shearX, float shearY, MatrixOrder order)
\r
230 GDIPlus.GdipShearMatrix (nativeMatrix, shearX, shearY, order);
\r
233 public void TransformPoints (Point[] pts)
\r
235 GDIPlus.GdipTransformMatrixPointsI (nativeMatrix, pts, pts.Length);
\r
238 public void TransformPoints (PointF[] pts)
\r
240 GDIPlus.GdipTransformMatrixPoints (nativeMatrix, pts, pts.Length);
\r
243 public void TransformVectors (Point[] pts)
\r
245 GDIPlus.GdipVectorTransformMatrixPointsI (nativeMatrix, pts, pts.Length);
\r
248 public void TransformVectors (PointF[] pts)
\r
250 GDIPlus.GdipVectorTransformMatrixPoints (nativeMatrix, pts, pts.Length);
\r
253 public void Translate (float offsetX, float offsetY)
\r
255 Translate (offsetX, offsetY, MatrixOrder.Prepend);
\r
258 public void Translate (float offsetX, float offsetY, MatrixOrder order)
\r
260 GDIPlus.GdipTranslateMatrix (nativeMatrix, offsetX, offsetY, order);
\r
263 public void VectorTransformPoints (Point[] pts)
\r
265 TransformVectors (pts);
\r