/// <summary>
/// あとでファイルとして保存できるように共有Bitmapの情報を保存しておく.
/// </summary>
/// <param name="inStream"></param>
/// <returns></returns>
private async Task KeepSharedBitmapInfoAsync(Windows.Storage.Streams.IRandomAccessStreamWithContentType inStream)
{
var decoder = await Windows.Graphics.Imaging.BitmapDecoder.CreateAsync(inStream);
this.fileName = DateTimeOffset.UtcNow.Ticks.ToString() + decoder.DecoderInformation.FileExtensions[0];
this.imageStream = new InMemoryRandomAccessStream();
inStream.Seek(0);
await Windows.Storage.Streams.RandomAccessStream.CopyAsync(inStream, imageStream);
}
// converts image to byte[]
public async static Task <byte[]> ImageToByteArray(StorageFile file)
{
byte[] fileBytes = null;
// convert file to byte[]
if (file != null)
{
using (Windows.Storage.Streams.IRandomAccessStreamWithContentType stream = await file.OpenReadAsync())
{
fileBytes = new byte[stream.Size];
using (DataReader reader = new DataReader(stream))
{
await reader.LoadAsync((uint)stream.Size);
reader.ReadBytes(fileBytes);
}
}
}
return(fileBytes);
}
