/* private static void PropertyChangedCallback(DependencyObject dependencyObject,
DependencyPropertyChangedEventArgs
dependencyPropertyChangedEventArgs)*/
private void load_image(String url)
{
if (_workItem != null && !_workItem.IsCompleted)
return;
_workItem = StaticInstance.ThreadPool.QueueWorkItem(() =>
{
// var instance = dependencyObject as CachedBitmap;
//SetLoading(true, instance);
HashAlgorithm hashAlg = new SHA512CryptoServiceProvider();
Crc64 crc64 = new Crc64(Crc64Iso.Iso3309Polynomial);
string urlcrc64 =
BitConverter.ToString(crc64.ComputeHash(Encoding.ASCII.GetBytes(url)))
.Replace("-", "").ToLower();
string cachePath = Path.Combine(Path.GetTempPath(), "sjupdater", "imagechache");
string filepath = Path.Combine(cachePath, urlcrc64.ToLower() + ".imagecache");
Action downloadAndSetAndCache = () =>
{
using (MemoryStream ms = DownloadData(url))
{
if (ms == null) return;
BitmapSource bitmapSource = BitmapImageFromStream(ms);
dispatcher.Invoke(() =>
{
ImageSource = bitmapSource;
});
CacheData(filepath, ms, hashAlg);
}
};
if (File.Exists(filepath))
{
byte[] cacheHash;
MemoryStream ms = GetCachedData(filepath, hashAlg, out cacheHash);
BitmapImage image = BitmapImageFromStream(ms);
// SetLoading(false, instance);
dispatcher.Invoke(() =>
{
ImageSource = image;
});
MemoryStream data = DownloadData(url);
if (data == null)
return;
byte[] downloadHash = new byte[hashAlg.HashSize / 8];
downloadHash = hashAlg.ComputeHash(data);
if (!cacheHash.Memcmp(downloadHash))
{
// SetLoading(true, instance);
downloadAndSetAndCache();
// SetLoading(false, instance);
}
}
else
{
// SetLoading(true, instance);
downloadAndSetAndCache();
// SetLoading(false, instance);
}
}, true, ThreadPriority.Lowest);
}
/* private static void PropertyChangedCallback(DependencyObject dependencyObject,
* DependencyPropertyChangedEventArgs
* dependencyPropertyChangedEventArgs)*/
private void load_image(String url)
{
if (_workItem != null && !_workItem.IsCompleted)
{
return;
}
_workItem = StaticInstance.ThreadPool.QueueWorkItem(() =>
{
// var instance = dependencyObject as CachedBitmap;
//SetLoading(true, instance);
HashAlgorithm hashAlg = new SHA512CryptoServiceProvider();
Crc64 crc64 = new Crc64(Crc64Iso.Iso3309Polynomial);
string urlcrc64 =
BitConverter.ToString(crc64.ComputeHash(Encoding.ASCII.GetBytes(url)))
.Replace("-", "").ToLower();
string cachePath = Path.Combine(Path.GetTempPath(), "sjupdater", "imagechache");
string filepath = Path.Combine(cachePath, urlcrc64.ToLower() + ".imagecache");
Action downloadAndSetAndCache = () =>
{
using (MemoryStream ms = DownloadData(url))
{
if (ms == null)
{
return;
}
BitmapSource bitmapSource = BitmapImageFromStream(ms);
dispatcher.Invoke(() =>
{
ImageSource = bitmapSource;
});
CacheData(filepath, ms, hashAlg);
}
};
if (File.Exists(filepath))
{
byte[] cacheHash;
MemoryStream ms = GetCachedData(filepath, hashAlg, out cacheHash);
BitmapImage image = BitmapImageFromStream(ms);
// SetLoading(false, instance);
dispatcher.Invoke(() =>
{
ImageSource = image;
});
MemoryStream data = DownloadData(url);
if (data == null)
{
return;
}
byte[] downloadHash = new byte[hashAlg.HashSize / 8];
downloadHash = hashAlg.ComputeHash(data);
if (!cacheHash.Memcmp(downloadHash))
{
// SetLoading(true, instance);
downloadAndSetAndCache();
// SetLoading(false, instance);
}
}
else
{
// SetLoading(true, instance);
downloadAndSetAndCache();
// SetLoading(false, instance);
}
}, true, ThreadPriority.Lowest);
}
