private static void ProcessScalableThumbnails(object state)
{
try
{
List <ceScalableThumbnail> list = null;
using (DbManager db = new DbManager())
{
ScalableThumbnailAccessor sta = ScalableThumbnailAccessor.CreateInstance <ScalableThumbnailAccessor>(db);
list = sta.GetUnscaledThumbnail();
// queue the task in random order
Random r = new Random();
while (list.Count > 0)
{
int index = r.Next(list.Count - 1);
if (!string.IsNullOrEmpty(list[index].OrginalFileName))
{
ProcessScalableThumbnail(db, list[index]);
}
list.RemoveAt(index);
}
}
}
catch (Exception ex)
{
Logger.Exception(ex);
}
if (state == null)
{
ProcessScalableThumbnails(typeof(ScalableThumbnailProcessor));
}
}
private static void ProcessScalableThumbnail(DbManager db, ceScalableThumbnail task)
{
try
{
ScalableThumbnailAccessor sta = ScalableThumbnailAccessor.CreateInstance <ScalableThumbnailAccessor>(db);
if (sta.IsThumbnailExist(task.OrginalFileName, task.Width, task.Height))
{
return;
}
ImageCodecInfo encoder;
string ext = Path.GetExtension(task.OrginalFileName).ToLowerInvariant();
switch (ext)
{
case ".jpg":
case ".jpeg":
encoder = GetEncoder(ImageFormat.Jpeg);
break;
case ".png":
encoder = GetEncoder(ImageFormat.Png);
break;
case ".gif":
encoder = GetEncoder(ImageFormat.Gif);
break;
default:
throw new Exception(string.Format("Unrecognized Filename [{0}]", task.OrginalFileName));
}
byte[] buffer = FTP.DownloadFile(task.FilePath);
if (buffer == null)
{
throw new Exception(string.Format("Failed to download FTP file [{0}].", task.FilePath));
}
using (MemoryStream ms = new MemoryStream(buffer))
using (MemoryStream dest = new MemoryStream())
using (Bitmap bitmap = new Bitmap(ms))
using (Bitmap canvas = new Bitmap(task.Width, task.Height))
using (Graphics g = Graphics.FromImage(canvas))
{
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.DrawImage(bitmap, new Rectangle(0, 0, task.Width, task.Height));
EncoderParameters eps = new EncoderParameters(1);
EncoderParameter ep = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 95L);
eps.Param[0] = ep;
canvas.Save(dest, encoder, eps);
buffer = dest.ToArray();
}
long domainID = task.DomainID.HasValue ? task.DomainID.Value : Constant.SystemDomainID;
using (MD5 md5 = MD5.Create())
{
byte[] bytes = md5.ComputeHash(buffer);
string hashCode = BitConverter.ToString(bytes).Replace("-", "");
string filePath = string.Format("/_casino/{0}/{1}{2}"
, hashCode[0]
, hashCode
, ext
);
FTP.UploadFile(domainID, filePath, buffer);
task.FilePath = filePath;
}
SqlQuery <ceScalableThumbnail> query = new SqlQuery <ceScalableThumbnail>(db);
query.Insert(task);
}
catch (Exception ex)
{
Logger.Exception(ex);
}
}