System.Resources.Win32IconFileReader.ReadIcons C# (CSharp) Méthode

	public ICONDIRENTRY[] ReadIcons () {
		ICONDIRENTRY[] icons = null;

		using (BinaryReader r = new BinaryReader (iconFile)) {
			int idReserved = r.ReadInt16 ();
			int idType = r.ReadInt16 ();
			if ((idReserved != 0) || (idType != 1))
				throw new Exception ("Invalid .ico file format");
			long nitems = r.ReadInt16 ();

			icons = new ICONDIRENTRY [nitems];

			for (int i = 0; i < nitems; ++i) {
				ICONDIRENTRY entry = new ICONDIRENTRY ();

				entry.bWidth = r.ReadByte ();
				entry.bHeight = r.ReadByte ();
				entry.bColorCount = r.ReadByte ();
				entry.bReserved = r.ReadByte ();
				entry.wPlanes = r.ReadInt16 ();
				entry.wBitCount = r.ReadInt16 ();
				int dwBytesInRes = r.ReadInt32 ();
				int dwImageOffset = r.ReadInt32 ();

				/* Read image */
				entry.image = new byte [dwBytesInRes];

				long pos = iconFile.Position;
				iconFile.Position = dwImageOffset;
				iconFile.Read (entry.image, 0, dwBytesInRes);
				iconFile.Position = pos;

				/* 
				 * The wPlanes and wBitCount members in the ICONDIRENTRY
				 * structure can be 0, so we set them from the BITMAPINFOHEADER
				 * structure that follows
				 */

				if (entry.wPlanes == 0)
					entry.wPlanes = (short)(entry.image [12] | (entry.image [13] << 8));
				if (entry.wBitCount == 0)
					entry.wBitCount = (short)(entry.image [14] | (entry.image [15] << 8));

				icons [i] = entry;
			}

			return icons;
		}
	}
}	

		/* 
		 * Mono extension to support /win32icon in mcs
		 */
		internal void DefineIconResource (string iconFileName)
		{
			if (iconFileName == null)
				throw new ArgumentNullException ("iconFileName");
			if (iconFileName.Length == 0)
				throw new ArgumentException ("iconFileName");
			if (!File.Exists (iconFileName) || Directory.Exists (iconFileName))
				throw new FileNotFoundException ("File '" + iconFileName + "' does not exists or is a directory.");

			using (FileStream fs = new FileStream (iconFileName, FileMode.Open, FileAccess.Read)) {
				Win32IconFileReader reader = new Win32IconFileReader (fs);
				
				ICONDIRENTRY[] entries = reader.ReadIcons ();

				Win32IconResource[] icons = new Win32IconResource [entries.Length];
				for (int i = 0; i < entries.Length; ++i) {
					icons [i] = new Win32IconResource (i + 1, 0, entries [i]);
					AddUnmanagedResource (icons [i]);
				}

				Win32GroupIconResource group = new Win32GroupIconResource (1, 0, icons);
				AddUnmanagedResource (group);
			}
		}