private string GenerateThumbnailId(string thumbnailId = null)
{
var ext = Common.GetImageExtension(FileFormat);
if (ext == null)
{
throw new MediaUnsupportedException(string.Format("FileFormat: {0}", FileFormat));
}
string id;
if (!string.IsNullOrEmpty(thumbnailId))
{
id = thumbnailId;
}
else
{
var fileName = new StringBuilder(Path.GetFileNameWithoutExtension(_source.Name));
var ci = CultureInfo.InvariantCulture;
fileName.Append("[");
fileName.Append(Size.Width.ToString(ci));
fileName.Append("x");
fileName.Append(Size.Height.ToString(ci));
if (ColorManagement != null)
{
fileName.Append(",cm(");
var sourceProfile = ColorManagement.GetProfile(ColorManagement, _source.Params.PixelFormat.ColorSpace);
if (sourceProfile != null)
{
fileName.Append(AjaxControls.Common.CalculateMD5(Encoding.UTF8.GetBytes(sourceProfile.Description)));
}
var targetProfile = ColorManagement.GetTargetProfile(ColorManagement);
if (targetProfile != null)
{
fileName.Append(",");
fileName.Append(AjaxControls.Common.CalculateMD5(Encoding.UTF8.GetBytes(targetProfile.Description)));
}
fileName.Append(")");
}
if (ResizeMode != Transforms.ResizeMode.Resize)
{
fileName.Append(",");
fileName.Append(ResizeMode);
}
fileName.Append("]");
id = fileName.ToString().ToLowerInvariant();
}
return(string.Format("{0}.{1}", id, ext));
}