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

   1 //
   2 // System.Drawing.Drawing2D.GraphicsPathIterator.cs
   3 //
   4 // Author:
   5 //   Dennis Hayes (dennish@Raytek.com)
   6 //   Duncan Mak (duncan@ximian.com)
   7 //   Ravindra (rkumar@novell.com)
   8 //
   9 // Copyright (C) 2002/3 Ximian, Inc (http://www.ximian.com)
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32 using System;
  33 using System.Drawing;
  34
  35 namespace System.Drawing.Drawing2D
  36 {
  37         public sealed class GraphicsPathIterator : MarshalByRefObject, IDisposable
  38         {
  39                 private IntPtr nativeObject = IntPtr.Zero;
  40
  41                 // Constructors
  42                 internal GraphicsPathIterator (IntPtr native)
  43                 {
  44                         this.nativeObject = native;
  45                 }
  46
  47                 public GraphicsPathIterator (GraphicsPath path)
  48                 {
  49                         Status status = GDIPlus.GdipCreatePathIter (out nativeObject, path.NativeObject);
  50                         GDIPlus.CheckStatus (status);
  51                 }
  52
  53                 internal IntPtr NativeObject {
  54                         get {
  55                                 return nativeObject;
  56                         }
  57                         set {
  58                                 nativeObject = value;
  59                         }
  60                 }
  61
  62                 // Public Properites
  63
  64                 public int Count {
  65                         get {
  66                                 int count;
  67                                 Status status = GDIPlus.GdipPathIterGetCount (nativeObject, out count);
  68                                 GDIPlus.CheckStatus (status);
  69
  70                                 return count;
  71                         }
  72                 }
  73
  74                 public int SubpathCount {
  75                         get {
  76                                 int count;
  77                                 Status status = GDIPlus.GdipPathIterGetSubpathCount (nativeObject, out count);
  78                                 GDIPlus.CheckStatus (status);
  79
  80                                 return count;
  81                         }
  82                 }
  83
  84                 internal void Dispose (bool disposing)
  85                 {
  86                         Status status;
  87                         if (nativeObject != IntPtr.Zero) {
  88                                 status = GDIPlus.GdipDeletePathIter (nativeObject);
  89                                 GDIPlus.CheckStatus (status);
  90
  91                                 nativeObject = IntPtr.Zero;
  92                         }
  93                 }
  94
  95                 // Public Methods.
  96
  97                 public int CopyData (ref PointF [] points, ref byte [] types, int startIndex, int endIndex)
  98                 {
  99                         Status status;
 100                         int resultCount;
 101
 102                         if (points.Length != types.Length)
 103                                 throw new ArgumentException ("Invalid arguments passed. Both arrays should have the same length.");
 104
 105                         status = GDIPlus.GdipPathIterCopyData (nativeObject, out resultCount, points, types, startIndex, endIndex);
 106                         GDIPlus.CheckStatus (status);
 107
 108                         return resultCount;
 109                 }
 110
 111                 public void Dispose ()
 112                 {
 113                         Dispose (true);
 114                         System.GC.SuppressFinalize (this);
 115                 }
 116
 117                 ~GraphicsPathIterator ()
 118                 {
 119                         Dispose (false);
 120                 }
 121
 122                 public int Enumerate (ref PointF [] points, ref byte [] types)
 123                 {
 124                         Status status;
 125                         int resultCount;
 126                         int count = points.Length;
 127
 128                         if (count != types.Length)
 129                                 throw new ArgumentException ("Invalid arguments passed. Both arrays should have the same length.");
 130
 131                         status = GDIPlus.GdipPathIterEnumerate (nativeObject, out resultCount, points, types, count);
 132                         GDIPlus.CheckStatus (status);
 133
 134                         return resultCount;
 135                 }
 136
 137                 public bool HasCurve ()
 138                 {
 139                         bool curve;
 140                         Status status = GDIPlus.GdipPathIterHasCurve (nativeObject, out curve);
 141                         GDIPlus.CheckStatus (status);
 142
 143                         return curve;
 144                 }
 145
 146                 public int NextMarker (GraphicsPath path)
 147                 {
 148                         Status status;
 149                         int resultCount;
 150                         status = GDIPlus.GdipPathIterNextMarkerPath (nativeObject, out resultCount, path.NativeObject);
 151                         GDIPlus.CheckStatus (status);
 152
 153                         return resultCount;
 154                 }
 155
 156                 public int NextMarker (out int startIndex, out int endIndex)
 157                 {
 158                         Status status;
 159                         int resultCount;
 160                         status = GDIPlus.GdipPathIterNextMarker (nativeObject, out resultCount, out startIndex, out endIndex);
 161                         GDIPlus.CheckStatus (status);
 162
 163                         return resultCount;
 164                 }
 165
 166                 public int NextPathType (out byte pathType, out int startIndex, out int endIndex)
 167                 {
 168                         Status status;
 169                         int resultCount;
 170                         status = GDIPlus.GdipPathIterNextPathType (nativeObject, out resultCount, out pathType, out startIndex, out endIndex);
 171                         GDIPlus.CheckStatus (status);
 172
 173                         return resultCount;
 174                 }
 175
 176                 public int NextSubpath (GraphicsPath path, out bool isClosed)
 177                 {
 178                         Status status;
 179                         int resultCount;
 180                         status = GDIPlus.GdipPathIterNextSubpathPath (nativeObject, out resultCount, path.NativeObject, out isClosed);
 181                         GDIPlus.CheckStatus (status);
 182
 183                         return resultCount;
 184                 }
 185
 186                 public int NextSubpath (out int startIndex, out int endIndex, out bool isClosed)
 187                 {
 188                         Status status;
 189                         int resultCount;
 190                         status = GDIPlus.GdipPathIterNextSubpath (nativeObject, out resultCount, out startIndex, out endIndex, out isClosed);
 191                         GDIPlus.CheckStatus (status);
 192
 193                         return resultCount;
 194                 }
 195
 196                 public void Rewind ()
 197                 {
 198                         Status status = GDIPlus.GdipPathIterRewind (nativeObject);
 199                         GDIPlus.CheckStatus (status);
 200                 }
 201         }
 202 }