mcs/class/System.Drawing/System.Drawing.Imaging/EncoderParameter.cs

   1 //
   2 // System.Drawing.Imaging.EncoderParameter.cs
   3 //
   4 // Author:
   5 //      Ravindra (rkumar@novell.com)
   6 //  Vladimir Vukicevic (vladimir@pobox.com)
   7 //
   8 // (C) 2004 Novell, Inc.  http://www.novell.com
   9 //
  10
  11 //
  12 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.Text;
  36
  37 using System.Runtime.InteropServices;
  38
  39 namespace System.Drawing.Imaging {
  40
  41         public sealed class EncoderParameter : IDisposable {
  42
  43                 private Encoder encoder;
  44                 private int valuesCount;
  45                 private EncoderParameterValueType type;
  46                 private IntPtr valuePtr;
  47
  48                 internal EncoderParameter ()
  49                 {
  50                 }
  51
  52                 public EncoderParameter (Encoder encoder, byte value)
  53                 {
  54                         this.encoder = encoder;
  55                         this.valuesCount = 1;
  56                         this.type = EncoderParameterValueType.ValueTypeByte;
  57                         this.valuePtr = Marshal.AllocHGlobal (1);
  58                         Marshal.WriteByte (this.valuePtr, value);
  59                 }
  60
  61                 public EncoderParameter (Encoder encoder, byte[] value)
  62                 {
  63                         this.encoder = encoder;
  64                         this.valuesCount = value.Length;
  65                         this.type = EncoderParameterValueType.ValueTypeByte;
  66                         this.valuePtr = Marshal.AllocHGlobal (1 * valuesCount);
  67                         Marshal.Copy (value, 0, this.valuePtr, valuesCount);
  68                 }
  69
  70                 public EncoderParameter (Encoder encoder, short value)
  71                 {
  72                         this.encoder = encoder;
  73                         this.valuesCount = 1;
  74                         this.type = EncoderParameterValueType.ValueTypeShort;
  75                         this.valuePtr = Marshal.AllocHGlobal (2);
  76                         Marshal.WriteInt16 (this.valuePtr, value);
  77                 }
  78
  79                 public EncoderParameter (Encoder encoder, short[] value)
  80                 {
  81                         this.encoder = encoder;
  82                         this.valuesCount = value.Length;
  83                         this.type = EncoderParameterValueType.ValueTypeShort;
  84                         this.valuePtr = Marshal.AllocHGlobal (2 * valuesCount);
  85                         Marshal.Copy (value, 0, this.valuePtr, valuesCount);
  86                 }
  87
  88
  89                 public EncoderParameter (Encoder encoder, long value)
  90                 {
  91                         this.encoder = encoder;
  92                         this.valuesCount = 1;
  93                         this.type = EncoderParameterValueType.ValueTypeLong;
  94                         this.valuePtr = Marshal.AllocHGlobal (4);
  95                         Marshal.WriteInt32 (this.valuePtr, (int) value);
  96                 }
  97
  98                 public EncoderParameter (Encoder encoder, long[] value)
  99                 {
 100                         this.encoder = encoder;
 101                         this.valuesCount = value.Length;
 102                         this.type = EncoderParameterValueType.ValueTypeLong;
 103                         this.valuePtr = Marshal.AllocHGlobal (4 * valuesCount);
 104                         int [] ivals = new int[value.Length];
 105                         for (int i = 0; i < value.Length; i++) ivals[i] = (int) value[i];
 106                         Marshal.Copy (ivals, 0, this.valuePtr, valuesCount);
 107                 }
 108
 109                 public EncoderParameter (Encoder encoder, string value)
 110                 {
 111                         this.encoder = encoder;
 112
 113                         ASCIIEncoding ascii = new ASCIIEncoding ();
 114                         int asciiByteCount = ascii.GetByteCount (value);
 115                         byte[] bytes = new byte [asciiByteCount];
 116                         ascii.GetBytes (value, 0, value.Length, bytes, 0);
 117
 118                         this.valuesCount = bytes.Length;
 119                         this.type = EncoderParameterValueType.ValueTypeAscii;
 120                         this.valuePtr = Marshal.AllocHGlobal (valuesCount);
 121                         Marshal.Copy (bytes, 0, this.valuePtr, valuesCount);
 122                 }
 123
 124                 public EncoderParameter (Encoder encoder, byte value, bool undefined)
 125                 {
 126                         this.encoder = encoder;
 127                         this.valuesCount = 1;
 128                         if (undefined)
 129                                 this.type = EncoderParameterValueType.ValueTypeUndefined;
 130                         else
 131                                 this.type = EncoderParameterValueType.ValueTypeByte;
 132                         this.valuePtr = Marshal.AllocHGlobal (1);
 133                         Marshal.WriteByte (this.valuePtr, value);
 134                 }
 135
 136                 public EncoderParameter (Encoder encoder, byte[] value, bool undefined)
 137                 {
 138                         this.encoder = encoder;
 139                         this.valuesCount = value.Length;
 140                         if (undefined)
 141                                 this.type = EncoderParameterValueType.ValueTypeUndefined;
 142                         else
 143                                 this.type = EncoderParameterValueType.ValueTypeByte;
 144                         this.valuePtr = Marshal.AllocHGlobal (valuesCount);
 145                         Marshal.Copy (value, 0, this.valuePtr, valuesCount);
 146                 }
 147
 148                 public EncoderParameter (Encoder encoder, int numerator, int denominator)
 149                 {
 150                         this.encoder = encoder;
 151                         this.valuesCount = 1;
 152                         this.type = EncoderParameterValueType.ValueTypeRational;
 153                         this.valuePtr = Marshal.AllocHGlobal (8);
 154                         int [] valuearray = { numerator, denominator };
 155                         Marshal.Copy (valuearray, 0, this.valuePtr, valuearray.Length);
 156                 }
 157
 158                 public EncoderParameter (Encoder encoder, int[] numerator, int[] denominator)
 159                 {
 160                         if (numerator.Length != denominator.Length)
 161                                 throw new ArgumentException ("Invalid parameter used.");
 162
 163                         this.encoder = encoder;
 164                         this.valuesCount = numerator.Length;
 165                         this.type = EncoderParameterValueType.ValueTypeRational;
 166                         this.valuePtr = Marshal.AllocHGlobal (4 * valuesCount * 2);
 167                         IntPtr dest = this.valuePtr;
 168                         for (int i = 0; i < valuesCount; i++) {
 169                                 Marshal.WriteInt32 (dest, (int) numerator[i]);
 170                                 dest = (IntPtr) ((int) dest + 4);
 171                                 Marshal.WriteInt32 (dest, (int) denominator[i]);
 172                                 dest = (IntPtr) ((int) dest + 4);
 173                         }
 174                 }
 175
 176                 public EncoderParameter (Encoder encoder, long rangebegin, long rangeend)
 177                 {
 178                         this.encoder = encoder;
 179                         this.valuesCount = 1;
 180                         this.type = EncoderParameterValueType.ValueTypeLongRange;
 181                         this.valuePtr = Marshal.AllocHGlobal (8);
 182                         int [] valuearray = { (int) rangebegin, (int) rangeend };
 183                         Marshal.Copy (valuearray, 0, this.valuePtr, valuearray.Length);
 184                 }
 185
 186                 public EncoderParameter (Encoder encoder, long[] rangebegin, long[] rangeend)
 187                 {
 188                         if (rangebegin.Length != rangeend.Length)
 189                                 throw new ArgumentException ("Invalid parameter used.");
 190
 191                         this.encoder = encoder;
 192                         this.valuesCount = rangebegin.Length;
 193                         this.type = EncoderParameterValueType.ValueTypeLongRange;
 194
 195                         this.valuePtr = Marshal.AllocHGlobal (4 * valuesCount * 2);
 196                         IntPtr dest = this.valuePtr;
 197                         for (int i = 0; i < valuesCount; i++) {
 198                                 Marshal.WriteInt32 (dest, (int) rangebegin[i]);
 199                                 dest = (IntPtr) ((int) dest + 4);
 200                                 Marshal.WriteInt32 (dest, (int) rangeend[i]);
 201                                 dest = (IntPtr) ((int) dest + 4);
 202                         }
 203                 }
 204
 205                 public EncoderParameter (Encoder encoder, int numberOfValues, int type, int value)
 206                 {
 207                         this.encoder = encoder;
 208                         this.valuePtr = (IntPtr) value;
 209                         this.valuesCount = numberOfValues;
 210                         this.type = (EncoderParameterValueType) type;
 211                 }
 212
 213                 public EncoderParameter (Encoder encoder, int numerator1, int denominator1, int numerator2, int denominator2)
 214                 {
 215                         this.encoder = encoder;
 216                         this.valuesCount = 1;
 217                         this.type = EncoderParameterValueType.ValueTypeRationalRange;
 218                         this.valuePtr = Marshal.AllocHGlobal (4 * 4);
 219                         int [] valuearray = { numerator1, denominator1, numerator2, denominator2 };
 220                         Marshal.Copy (valuearray, 0, this.valuePtr, 4);
 221                 }
 222
 223                 public EncoderParameter (Encoder encoder, int[] numerator1, int[] denominator1, int[] numerator2, int[] denominator2)
 224                 {
 225                         if (numerator1.Length != denominator1.Length ||
 226                             numerator2.Length != denominator2.Length ||
 227                             numerator1.Length != numerator2.Length)
 228                                 throw new ArgumentException ("Invalid parameter used.");
 229
 230                         this.encoder = encoder;
 231                         this.valuesCount = numerator1.Length;
 232                         this.type = EncoderParameterValueType.ValueTypeRationalRange;
 233
 234                         this.valuePtr = Marshal.AllocHGlobal (4 * valuesCount * 4);
 235                         IntPtr dest = this.valuePtr;
 236                         for (int i = 0; i < valuesCount; i++) {
 237                                 Marshal.WriteInt32 (dest, numerator1[i]);
 238                                 dest = (IntPtr) ((int) dest + 4);
 239                                 Marshal.WriteInt32 (dest, denominator1[i]);
 240                                 dest = (IntPtr) ((int) dest + 4);
 241                                 Marshal.WriteInt32 (dest, numerator2[i]);
 242                                 dest = (IntPtr) ((int) dest + 4);
 243                                 Marshal.WriteInt32 (dest, denominator2[i]);
 244                                 dest = (IntPtr) ((int) dest + 4);
 245                         }
 246                 }
 247
 248                 public Encoder Encoder {
 249                         get {
 250                                 return encoder;
 251                         }
 252
 253                         set {
 254                                 encoder = value;
 255                         }
 256                 }
 257
 258                 public int NumberOfValues {
 259                         get {
 260                                 return valuesCount;
 261                         }
 262                 }
 263
 264                 public EncoderParameterValueType Type {
 265                         get {
 266                                 return type;
 267                         }
 268                 }
 269
 270                 public EncoderParameterValueType ValueType {
 271                         get {
 272                                 return type;
 273                         }
 274                 }
 275
 276                 void Dispose (bool disposing) {
 277                         if (valuePtr != IntPtr.Zero) {
 278                                 Marshal.FreeHGlobal (valuePtr);
 279                                 valuePtr = IntPtr.Zero;
 280                         }
 281                 }
 282
 283                 public void Dispose () {
 284                         Dispose (true);
 285                 }
 286
 287                 ~EncoderParameter () {
 288                         Dispose (false);
 289                 }
 290
 291                 internal static int NativeSize () {
 292                         return Marshal.SizeOf (typeof(GdipEncoderParameter));
 293                 }
 294
 295                 internal void ToNativePtr (IntPtr epPtr) {
 296                         GdipEncoderParameter ep = new GdipEncoderParameter ();
 297                         ep.guid = this.encoder.Guid;
 298                         ep.numberOfValues = (uint) this.valuesCount;
 299                         ep.type = this.type;
 300                         ep.value = this.valuePtr;
 301                         Marshal.StructureToPtr (ep, epPtr, false);
 302                 }
 303
 304                 internal static EncoderParameter FromNativePtr (IntPtr epPtr) {
 305                         GdipEncoderParameter ep;
 306                         ep = (GdipEncoderParameter) Marshal.PtrToStructure (epPtr, typeof(GdipEncoderParameter));
 307
 308                         Type valType;
 309                         uint valCount;
 310
 311                         switch (ep.type) {
 312                         case EncoderParameterValueType.ValueTypeAscii:
 313                         case EncoderParameterValueType.ValueTypeByte:
 314                         case EncoderParameterValueType.ValueTypeUndefined:
 315                                 valType = typeof(byte);
 316                                 valCount = ep.numberOfValues;
 317                                 break;
 318                         case EncoderParameterValueType.ValueTypeShort:
 319                                 valType = typeof(short);
 320                                 valCount = ep.numberOfValues;
 321                                 break;
 322                         case EncoderParameterValueType.ValueTypeLong:
 323                                 valType = typeof(int);
 324                                 valCount = ep.numberOfValues;
 325                                 break;
 326                         case EncoderParameterValueType.ValueTypeLongRange:
 327                         case EncoderParameterValueType.ValueTypeRational:
 328                                 valType = typeof(int);
 329                                 valCount = ep.numberOfValues * 2;
 330                                 break;
 331                         case EncoderParameterValueType.ValueTypeRationalRange:
 332                                 valType = typeof(int);
 333                                 valCount = ep.numberOfValues * 4;
 334                                 break;
 335                         default:
 336                                 return null;
 337                         }
 338
 339                         EncoderParameter eparam = new EncoderParameter();
 340                         eparam.encoder = new Encoder(ep.guid);
 341                         eparam.valuesCount = (int) ep.numberOfValues;
 342                         eparam.type = ep.type;
 343                         eparam.valuePtr = Marshal.AllocHGlobal ((int)(valCount * Marshal.SizeOf(valType)));
 344
 345                         /* There's nothing in Marshal to do a memcpy() between two IntPtrs.  This sucks. */
 346                         unsafe {
 347                                 byte *s = (byte *) ep.value;
 348                                 byte *d = (byte *) eparam.valuePtr;
 349                                 for (int i = 0; i < valCount * Marshal.SizeOf(valType); i++)
 350                                         *d++ = *s++;
 351                         }
 352
 353                         return eparam;
 354                 }
 355         }
 356 }