2 // System.Drawing.Drawing2D.Matrix.cs
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5 // Stefan Maierhofer <sm@cg.tuwien.ac.at>
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6 // Dennis Hayes (dennish@Raytek.com)
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7 // Duncan Mak (duncan@ximian.com)
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8 // Ravindra (rkumar@novell.com)
10 // (C) Ximian, Inc. http://www.ximian.com
11 // (C) Novell, Inc. http://www.novell.com
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15 using System.Drawing;
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16 using System.Runtime.InteropServices;
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18 namespace System.Drawing.Drawing2D
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20 public sealed class Matrix : MarshalByRefObject, IDisposable
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22 internal IntPtr nativeMatrix;
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25 internal Matrix (IntPtr ptr)
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32 Status status = GDIPlus.GdipCreateMatrix (out nativeMatrix);
33 GDIPlus.CheckStatus (status);
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36 public Matrix (Rectangle rect , Point[] plgpts)
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38 Status status = GDIPlus.GdipCreateMatrix3I (rect, plgpts, out nativeMatrix);
39 GDIPlus.CheckStatus (status);
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42 public Matrix (RectangleF rect , PointF[] pa)
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44 Status status = GDIPlus.GdipCreateMatrix3 (rect, pa, out nativeMatrix);
45 GDIPlus.CheckStatus (status);
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48 public Matrix (float m11, float m12, float m21, float m22, float dx, float dy)
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50 Status status = GDIPlus.GdipCreateMatrix2 (m11, m12, m21, m22, dx, dy, out nativeMatrix);
51 GDIPlus.CheckStatus (status);
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55 public float[] Elements {
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57 IntPtr tmp = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (float)) * 6);
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58 float [] retval = new float [6];
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60 Status status = GDIPlus.GdipGetMatrixElements (nativeMatrix, tmp);
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61 GDIPlus.CheckStatus (status);
63 Marshal.Copy (tmp, retval, 0, 6);
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65 Marshal.FreeHGlobal (tmp);
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70 public bool IsIdentity {
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73 Status status = GDIPlus.GdipIsMatrixIdentity (nativeMatrix, out retval);
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74 GDIPlus.CheckStatus (status);
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79 public bool IsInvertible {
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82 Status status = GDIPlus.GdipIsMatrixInvertible (nativeMatrix, out retval);
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83 GDIPlus.CheckStatus (status);
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88 public float OffsetX {
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90 return this.Elements [4];
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94 public float OffsetY {
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96 return this.Elements [5];
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100 public Matrix Clone()
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103 Status status = GDIPlus.GdipCloneMatrix (nativeMatrix, out retval);
104 GDIPlus.CheckStatus (status);
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105 return new Matrix (retval);
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109 public void Dispose ()
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111 Status status = GDIPlus.GdipDeleteMatrix (nativeMatrix);
112 GDIPlus.CheckStatus (status);
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115 public override bool Equals (object obj)
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117 Matrix m = obj as Matrix;
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121 Status status = GDIPlus.GdipIsMatrixEqual (nativeMatrix, m.nativeMatrix, out retval);
122 GDIPlus.CheckStatus (status);
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134 public override int GetHashCode ()
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136 return base.GetHashCode ();
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139 public void Invert ()
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141 Status status = GDIPlus.GdipInvertMatrix (nativeMatrix);
142 GDIPlus.CheckStatus (status);
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145 public void Multiply (Matrix matrix)
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147 Multiply (matrix, MatrixOrder.Prepend);
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150 public void Multiply (Matrix matrix, MatrixOrder order)
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152 Status status = GDIPlus.GdipMultiplyMatrix (nativeMatrix, matrix.nativeMatrix, order);
153 GDIPlus.CheckStatus (status);
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156 public void Reset()
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158 Status status = GDIPlus.GdipSetMatrixElements (nativeMatrix, 1, 0, 0, 1, 0, 0);
159 GDIPlus.CheckStatus (status);
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162 public void Rotate (float angle)
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164 Rotate (angle, MatrixOrder.Prepend);
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167 public void Rotate (float angle, MatrixOrder order)
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169 Status status = GDIPlus.GdipRotateMatrix (nativeMatrix, angle, order);
170 GDIPlus.CheckStatus (status);
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173 public void RotateAt (float angle, PointF point)
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175 RotateAt (angle, point, MatrixOrder.Prepend);
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178 public void RotateAt (float angle, PointF point, MatrixOrder order)
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180 angle *= (float) (Math.PI / 180.0); // degrees to radians
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181 float cos = (float) Math.Cos (angle);
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182 float sin = (float) Math.Sin (angle);
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183 float e4 = -point.X * cos + point.Y * sin + point.X;
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184 float e5 = -point.X * sin - point.Y * cos + point.Y;
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185 float[] m = this.Elements;
189 if (order == MatrixOrder.Prepend)
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190 status = GDIPlus.GdipSetMatrixElements (nativeMatrix,
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191 cos * m[0] + sin * m[2],
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192 cos * m[1] + sin * m[3],
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193 -sin * m[0] + cos * m[2],
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194 -sin * m[1] + cos * m[3],
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195 e4 * m[0] + e5 * m[2] + m[4],
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196 e4 * m[1] + e5 * m[3] + m[5]);
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198 status = GDIPlus.GdipSetMatrixElements (nativeMatrix,
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199 m[0] * cos + m[1] * -sin,
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200 m[0] * sin + m[1] * cos,
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201 m[2] * cos + m[3] * -sin,
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202 m[2] * sin + m[3] * cos,
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203 m[4] * cos + m[5] * -sin + e4,
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204 m[4] * sin + m[5] * cos + e5);
205 GDIPlus.CheckStatus (status);
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208 public void Scale (float scaleX, float scaleY)
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210 Scale (scaleX, scaleY, MatrixOrder.Prepend);
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213 public void Scale (float scaleX, float scaleY, MatrixOrder order)
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215 Status status = GDIPlus.GdipScaleMatrix (nativeMatrix, scaleX, scaleY, order);
216 GDIPlus.CheckStatus (status);
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219 public void Shear (float shearX, float shearY)
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221 Shear (shearX, shearY, MatrixOrder.Prepend);
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224 public void Shear (float shearX, float shearY, MatrixOrder order)
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226 Status status = GDIPlus.GdipShearMatrix (nativeMatrix, shearX, shearY, order);
227 GDIPlus.CheckStatus (status);
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230 public void TransformPoints (Point[] pts)
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232 Status status = GDIPlus.GdipTransformMatrixPointsI (nativeMatrix, pts, pts.Length);
233 GDIPlus.CheckStatus (status);
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236 public void TransformPoints (PointF[] pts)
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238 Status status = GDIPlus.GdipTransformMatrixPoints (nativeMatrix, pts, pts.Length);
239 GDIPlus.CheckStatus (status);
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242 public void TransformVectors (Point[] pts)
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244 Status status = GDIPlus.GdipVectorTransformMatrixPointsI (nativeMatrix, pts, pts.Length);
245 GDIPlus.CheckStatus (status);
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248 public void TransformVectors (PointF[] pts)
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250 Status status = GDIPlus.GdipVectorTransformMatrixPoints (nativeMatrix, pts, pts.Length);
251 GDIPlus.CheckStatus (status);
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254 public void Translate (float offsetX, float offsetY)
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256 Translate (offsetX, offsetY, MatrixOrder.Prepend);
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259 public void Translate (float offsetX, float offsetY, MatrixOrder order)
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261 Status status = GDIPlus.GdipTranslateMatrix (nativeMatrix, offsetX, offsetY, order);
262 GDIPlus.CheckStatus (status);
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265 public void VectorTransformPoints (Point[] pts)
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267 TransformVectors (pts);
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