protected async Task SaveThumbail(Func <byte[], Thumbnail> funcGetThumbnail, byte[] data)
{
using (InMemoryRandomAccessStream ras = new InMemoryRandomAccessStream())
{
// Encode pixels into stream
var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, ras);
encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Premultiplied, (uint)ThumbnailSize.Width, (uint)ThumbnailSize.Height, 96, 96, data);
await encoder.FlushAsync();
byte[] pngPixel = new byte[ras.Size];
ras.AsStreamForRead().Read(pngPixel, 0, (int)ras.Size);
//DB 등록
ThumbnailDAO.InsertThumbnail(funcGetThumbnail.Invoke(pngPixel));
}
}
//원드라이브로 부터 썸네일로 이미지를 다운로드 받아,
//NetworItemInfo에 이미지를 로딩 시킨후 DB에 캐쉬로 저장한다.
private async Task StoreImageFromWeb(NetworkItemInfo networkItem, Microsoft.OneDrive.Sdk.Thumbnail itemThumb)
{
if (itemThumb != null)
{
try
{
var webReq = System.Net.WebRequest.Create(itemThumb.Url);
await GalaSoft.MvvmLight.Threading.DispatcherHelper.RunAsync(async() =>
{
using (var webRes = await webReq.GetResponseAsync())
{
using (var imageStream = webRes.GetResponseStream())
{
WriteableBitmap wb = await BitmapFactory.FromStream(imageStream);
networkItem.ImageItemsSource = wb;
using (InMemoryRandomAccessStream newStream = new InMemoryRandomAccessStream())
{
await wb.ToStream(newStream, BitmapEncoder.PngEncoderId);
byte[] pngData = new byte[newStream.Size];
await newStream.ReadAsync(pngData.AsBuffer(), (uint)pngData.Length, InputStreamOptions.None);
//DB 등록
ThumbnailDAO.InsertThumbnail(new Models.Thumbnail
{
Name = networkItem.Name,
ParentPath = networkItem.ParentFolderPath,
Size = (ulong)networkItem.Size,
RunningTime = networkItem.Duration,
CreatedDateTime = networkItem.Modified,
ThumbnailData = pngData
});
}
}
}
});
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
}
}
