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 //   Jordi Mas i Hernandez (jordi@ximian.com)
   9 //   Sebastien Pouliot  <sebastien@ximian.com>
  10 //
  11 // (C) 2002 Ximian, Inc.  http://www.ximian.com
  12 // Copyright (C) 2004,2006,2007 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.Runtime.InteropServices;
  35 using System.Collections;
  36 using System.IO;
  37
  38 namespace System.Drawing.Imaging {
  39
  40 #if ONLY_1_1
  41         [ComVisible (false)]
  42 #endif
  43         public sealed class ImageCodecInfo {
  44                 private Guid clsid;
  45                 private string codecName;
  46                 private string dllName;
  47                 private string filenameExtension;
  48                 private ImageCodecFlags flags;
  49                 private string formatDescription;
  50                 private Guid formatID;
  51                 private string  mimeType;
  52                 private byte[][] signatureMasks;
  53                 private byte[][] signaturePatterns;
  54                 private int version;
  55
  56                 internal ImageCodecInfo()
  57                 {
  58                 }
  59
  60                 // methods
  61                 public static ImageCodecInfo[] GetImageDecoders()
  62                 {
  63                         int decoderNums, arraySize, decoder_size;
  64                         IntPtr decoders, decoder_ptr;
  65                         ImageCodecInfo[] result;
  66                         GdipImageCodecInfo gdipdecoder = new GdipImageCodecInfo();
  67                         Status status;
  68
  69                         status = GDIPlus.GdipGetImageDecodersSize (out decoderNums, out arraySize);
  70                         GDIPlus.CheckStatus (status);
  71
  72                         result =  new ImageCodecInfo [decoderNums];
  73
  74                         if (decoderNums == 0)
  75                                 return result;
  76
  77                         /* Get decoders list*/
  78                         decoders = Marshal.AllocHGlobal (arraySize);
  79                         try {
  80                                 status = GDIPlus.GdipGetImageDecoders (decoderNums,  arraySize, decoders);
  81                                 GDIPlus.CheckStatus (status);
  82
  83                                 decoder_size = Marshal.SizeOf (gdipdecoder);
  84                                 decoder_ptr = decoders;
  85
  86                                 for (int i = 0; i < decoderNums; i++, decoder_ptr = new IntPtr (decoder_ptr.ToInt64 () + decoder_size)) {
  87                                         gdipdecoder = (GdipImageCodecInfo) Marshal.PtrToStructure (decoder_ptr, typeof (GdipImageCodecInfo));
  88                                         result[i] = new ImageCodecInfo ();
  89                                         GdipImageCodecInfo.MarshalTo (gdipdecoder, result[i]);
  90                                 }
  91                         }
  92                         finally {
  93                                 Marshal.FreeHGlobal (decoders);
  94                         }
  95                         return result;
  96                 }
  97
  98
  99                 public static ImageCodecInfo[] GetImageEncoders()
 100                 {
 101                         int encoderNums, arraySize, encoder_size;
 102                         IntPtr encoders, encoder_ptr;
 103                         ImageCodecInfo[] result;
 104                         GdipImageCodecInfo gdipencoder = new GdipImageCodecInfo();
 105                         Status status;
 106
 107                         status = GDIPlus.GdipGetImageEncodersSize (out encoderNums, out arraySize);
 108                         GDIPlus.CheckStatus (status);
 109
 110                         result =  new ImageCodecInfo [encoderNums];
 111
 112                         if (encoderNums == 0)
 113                                 return result;
 114
 115                         /* Get encoders list*/
 116                         encoders = Marshal.AllocHGlobal (arraySize);
 117                         try {
 118                                 status = GDIPlus.GdipGetImageEncoders (encoderNums,  arraySize, encoders);
 119                                 GDIPlus.CheckStatus (status);
 120
 121                                 encoder_size = Marshal.SizeOf (gdipencoder);
 122                                 encoder_ptr = encoders;
 123
 124                                 for (int i = 0; i < encoderNums; i++, encoder_ptr = new IntPtr (encoder_ptr.ToInt64 () + encoder_size)) {
 125                                         gdipencoder = (GdipImageCodecInfo) Marshal.PtrToStructure (encoder_ptr, typeof (GdipImageCodecInfo));
 126                                         result[i] = new ImageCodecInfo ();
 127                                         GdipImageCodecInfo.MarshalTo (gdipencoder, result[i]);
 128                                 }
 129                         }
 130                         finally {
 131                                 Marshal.FreeHGlobal (encoders);
 132                         }
 133                         return result;
 134                 }
 135
 136                 // properties
 137
 138                 public Guid Clsid
 139                 {
 140                         get { return clsid; }
 141                         set { clsid = value; }
 142                 }
 143
 144
 145                 public string CodecName
 146                 {
 147                         get { return codecName; }
 148                         set { codecName = value; }
 149                 }
 150
 151
 152                 public string DllName
 153                 {
 154                         get { return dllName; }
 155                         set { dllName = value; }
 156                 }
 157
 158
 159                 public string FilenameExtension
 160                 {
 161                         get { return filenameExtension; }
 162                         set { filenameExtension = value; }
 163                 }
 164
 165
 166                 public ImageCodecFlags Flags
 167                 {
 168                         get { return flags; }
 169                         set { flags = value; }
 170                 }
 171
 172                 public string FormatDescription
 173                 {
 174                         get { return formatDescription; }
 175                         set { formatDescription = value; }
 176                 }
 177
 178                 public Guid FormatID
 179                 {
 180                         get { return formatID; }
 181                         set { formatID = value; }
 182                 }
 183
 184
 185                 public string MimeType
 186                 {
 187                         get { return mimeType; }
 188                         set { mimeType = value; }
 189                 }
 190
 191
 192                 [CLSCompliant(false)]
 193                 public byte[][] SignatureMasks
 194                 {
 195                         get { return signatureMasks; }
 196                         set { signatureMasks = value; }
 197                 }
 198
 199                 [CLSCompliant(false)]
 200                 public byte[][] SignaturePatterns
 201                 {
 202                         get { return signaturePatterns; }
 203                         set { signaturePatterns = value; }
 204                 }
 205
 206                 public int Version
 207                 {
 208                         get { return version; }
 209                         set { version = value; }
 210                 }
 211         }
 212 }