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

   1 //
   2 // System.Drawing.Imaging.ImageCodecInfo.cs
   3 //
   4 // Authors:
   5 //   Everaldo Canuto (everaldo.canuto@bol.com.br)
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //   Dennis Hayes (dennish@raytek.com)
   8 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   9 //   Dennis Hayes (dennish@raytek.com)
  10 //   Jordi Mas i Hernandez (jordi@ximian.com)
  11 //
  12 // (C) 2002 Ximian, Inc.  http://www.ximian.com
  13 // Copyright (C) 2004,2006 Novell, Inc (http://www.novell.com)
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System.Runtime.InteropServices;
  36 using System.Collections;
  37 using System.IO;
  38
  39 namespace System.Drawing.Imaging {
  40
  41 #if ONLY_1_1
  42         [ComVisible (false)]
  43 #endif
  44         public sealed class ImageCodecInfo {
  45                 private Guid clsid;
  46                 private string codecName;
  47                 private string dllName;
  48                 private string filenameExtension;
  49                 private ImageCodecFlags flags;
  50                 private string formatDescription;
  51                 private Guid formatID;
  52                 private string  mimeType;
  53                 private byte[][] signatureMasks;
  54                 private byte[][] signaturePatterns;
  55                 private int version;
  56
  57                 internal ImageCodecInfo()
  58                 {
  59
  60                 }
  61
  62                 // methods
  63                 public static ImageCodecInfo[] GetImageDecoders()
  64                 {
  65                         int decoderNums, arraySize, decoder_size;
  66                         IntPtr decoders, decoder_ptr;
  67                         ImageCodecInfo[] result;
  68                         GdipImageCodecInfo gdipdecoder = new GdipImageCodecInfo();
  69                         Status status;
  70
  71                         status = GDIPlus.GdipGetImageDecodersSize (out decoderNums, out arraySize);
  72                         GDIPlus.CheckStatus (status);
  73
  74                         result =  new ImageCodecInfo [decoderNums];
  75
  76                         if (decoderNums == 0)
  77                                 return result;
  78
  79                         /* Get decoders list*/
  80                         decoders = Marshal.AllocHGlobal (arraySize);
  81                         try {
  82                                 status = GDIPlus.GdipGetImageDecoders (decoderNums,  arraySize, decoders);
  83                                 GDIPlus.CheckStatus (status);
  84
  85                                 decoder_size = Marshal.SizeOf (gdipdecoder);
  86                                 decoder_ptr = decoders;
  87
  88                                 for (int i = 0; i < decoderNums; i++, decoder_ptr = new IntPtr (decoder_ptr.ToInt64 () + decoder_size)) {
  89                                         gdipdecoder = (GdipImageCodecInfo) Marshal.PtrToStructure (decoder_ptr, typeof (GdipImageCodecInfo));
  90                                         result[i] = new ImageCodecInfo ();
  91                                         GdipImageCodecInfo.MarshalTo (gdipdecoder, result[i]);
  92                                 }
  93                         }
  94                         finally {
  95                                 Marshal.FreeHGlobal (decoders);
  96                         }
  97                         return result;
  98                 }
  99
 100
 101                 public static ImageCodecInfo[] GetImageEncoders()
 102                 {
 103                         int encoderNums, arraySize, encoder_size;
 104                         IntPtr encoders, encoder_ptr;
 105                         ImageCodecInfo[] result;
 106                         GdipImageCodecInfo gdipencoder = new GdipImageCodecInfo();
 107                         Status status;
 108
 109                         status = GDIPlus.GdipGetImageEncodersSize (out encoderNums, out arraySize);
 110                         GDIPlus.CheckStatus (status);
 111
 112                         result =  new ImageCodecInfo [encoderNums];
 113
 114                         if (encoderNums == 0)
 115                                 return result;
 116
 117                         /* Get encoders list*/
 118                         encoders = Marshal.AllocHGlobal (arraySize);
 119                         try {
 120                                 status = GDIPlus.GdipGetImageEncoders (encoderNums,  arraySize, encoders);
 121                                 GDIPlus.CheckStatus (status);
 122
 123                                 encoder_size = Marshal.SizeOf (gdipencoder);
 124                                 encoder_ptr = encoders;
 125
 126                                 for (int i = 0; i < encoderNums; i++, encoder_ptr = new IntPtr (encoder_ptr.ToInt64 () + encoder_size)) {
 127                                         gdipencoder = (GdipImageCodecInfo) Marshal.PtrToStructure (encoder_ptr, typeof (GdipImageCodecInfo));
 128                                         result[i] = new ImageCodecInfo ();
 129                                         GdipImageCodecInfo.MarshalTo (gdipencoder, result[i]);
 130                                 }
 131                         }
 132                         finally {
 133                                 Marshal.FreeHGlobal (encoders);
 134                         }
 135                         return result;
 136                 }
 137
 138                 // properties
 139
 140                 public Guid Clsid
 141                 {
 142                         get { return clsid; }
 143                         set { clsid = value; }
 144                 }
 145
 146
 147                 public string CodecName
 148                 {
 149                         get { return codecName; }
 150                         set { codecName = value; }
 151                 }
 152
 153
 154                 public string DllName
 155                 {
 156                         get { return dllName; }
 157                         set { dllName = value; }
 158                 }
 159
 160
 161                 public string FilenameExtension
 162                 {
 163                         get { return filenameExtension; }
 164                         set { filenameExtension = value; }
 165                 }
 166
 167
 168                 public ImageCodecFlags Flags
 169                 {
 170                         get { return flags; }
 171                         set { flags = value; }
 172                 }
 173
 174                 public string FormatDescription
 175                 {
 176                         get { return formatDescription; }
 177                         set { formatDescription = value; }
 178                 }
 179
 180                 public Guid FormatID
 181                 {
 182                         get { return formatID; }
 183                         set { formatID = value; }
 184                 }
 185
 186
 187                 public string MimeType
 188                 {
 189                         get { return mimeType; }
 190                         set { mimeType = value; }
 191                 }
 192
 193
 194                 [CLSCompliant(false)]
 195                 public byte[][] SignatureMasks
 196                 {
 197                         get { return signatureMasks; }
 198                         set { signatureMasks = value; }
 199                 }
 200
 201                 [MonoTODO]
 202                 [CLSCompliant(false)]
 203                 public byte[][] SignaturePatterns
 204                 {
 205                         get { return signaturePatterns; }
 206                         set { signaturePatterns = value; }
 207                 }
 208
 209                 public int Version
 210                 {
 211                         get { return version; }
 212                         set { version = value; }
 213                 }
 214
 215         }
 216
 217 }