/// <summary>
/// Loads the icon information from the givin icon into class members.
/// </summary>
/// <param name="icon">A System.Drawing.Icon object to retrieve the information about.</param>
private void LoadIconInfo(Icon icon)
{
if (icon == null)
{
throw new ArgumentNullException("icon");
}
this.SourceIcon = icon;
MemoryStream inputStream = new MemoryStream();
this.SourceIcon.Save(inputStream);
inputStream.Seek(0, SeekOrigin.Begin);
IconDir dir = StreamHelper.ReadStructure <IconDir>(inputStream);
this.IconDir = dir;
this.GroupIconDir = dir.ToGroupIconDir();
this.Images = new List <Icon>(dir.Count);
this.IconDirEntries = new List <IconDirEntry>(dir.Count);
this.GroupIconDirEntries = new List <GroupIconDirEntry>(dir.Count);
this.RawData = new List <byte[]>(dir.Count);
IconDir newDir = dir;
newDir.Count = 1;
for (int i = 0; i < dir.Count; i++)
{
inputStream.Seek(SizeOfIconDir + i * SizeOfIconDirEntry, SeekOrigin.Begin);
IconDirEntry entry = StreamHelper.ReadStructure <IconDirEntry>(inputStream);
this.IconDirEntries.Add(entry);
this.GroupIconDirEntries.Add(entry.ToGroupIconDirEntry(i));
byte[] content = new byte[entry.BytesInRes];
inputStream.Seek(entry.ImageOffset, SeekOrigin.Begin);
inputStream.Read(content, 0, content.Length);
this.RawData.Add(content);
IconDirEntry newEntry = entry;
newEntry.ImageOffset = SizeOfIconDir + SizeOfIconDirEntry;
MemoryStream outputStream = new MemoryStream();
StreamHelper.WriteStructure <IconDir>(outputStream, newDir);
StreamHelper.WriteStructure <IconDirEntry>(outputStream, newEntry);
outputStream.Write(content, 0, content.Length);
outputStream.Seek(0, SeekOrigin.Begin);
Icon newIcon = new Icon(outputStream);
outputStream.Close();
this.Images.Add(newIcon);
if (dir.Count == 1)
{
this.BestFitIconIndex = 0;
this.Width = entry.Width;
this.Height = entry.Height;
this.ColorCount = entry.ColorCount;
this.Planes = entry.Planes;
this.BitCount = entry.BitCount;
}
}
inputStream.Close();
this.ResourceRawData = GetIconResourceData();
if (dir.Count > 1)
{
this.BestFitIconIndex = GetBestFitIconIndex();
this.Width = this.IconDirEntries[this.BestFitIconIndex].Width;
this.Height = this.IconDirEntries[this.BestFitIconIndex].Height;
this.ColorCount = this.IconDirEntries[this.BestFitIconIndex].ColorCount;
this.Planes = this.IconDirEntries[this.BestFitIconIndex].Planes;
this.BitCount = this.IconDirEntries[this.BestFitIconIndex].BitCount;
}
}
