/// <summary>
/// Loads an associated icon from a file located in the specified filePath
/// </summary>
/// <param name="filePath">The path to the file from which to load the associated icon</param>
/// <param name="iconHash">The output icon hash string</param>
/// <returns></returns>
private static BitmapSource LoadIcon(string filePath, out string iconHash)
{
Icon icon = null;
// The LoadIcon method can be called from not the main thread but GetFileIcon have to be called only
// from the main thread so we need to always use our Dispatcher object to invoke GetFileIcon method
Dispatcher.Invoke(() => icon = FileToIconConverter.GetFileIcon(filePath));
BitmapSource image = FileToIconConverter.LoadBitmap(icon);
if (image.CanFreeze)
{
image.Freeze();
}
var tempBmp = icon.ToBitmap();
var thumbnail = GetThumbnail(tempBmp);
iconHash = GetImageHash(thumbnail);
thumbnail?.Dispose();
tempBmp?.Dispose();
icon?.Dispose();
return(image);
}
/// <summary>
/// Loads an icon from an image file located in the specified filePath
/// </summary>
/// <param name="filePath">The path to the image file from which to load the icon</param>
/// <param name="iconHash">The output icon hash string</param>
/// <returns></returns>
private static ImageSource LoadIconFromImageFile(string filePath, out string iconHash)
{
Bitmap originalImage = null;
Bitmap resizedImage = null;
Bitmap thumbnail = null;
try
{
originalImage = new Bitmap(filePath);
float aspectRatio = originalImage.Width / (float)originalImage.Height;
int newWidth = DefaultIconSize;
int newHeight = (int)(DefaultIconSize / aspectRatio);
resizedImage = new Bitmap(originalImage, newWidth, newHeight);
ImageSource resultImage = FileToIconConverter.LoadBitmap(resizedImage);
if (resultImage.CanFreeze)
{
resultImage.Freeze();
}
thumbnail = GetThumbnail(resizedImage);
iconHash = GetImageHash(thumbnail);
return(resultImage);
}
catch
{
iconHash = string.Empty;
return(null);
}
finally
{
originalImage?.Dispose();
resizedImage?.Dispose();
thumbnail?.Dispose();
}
}