private ImageSource GenerateThumbnail(DataTransferredEventArgs e)
{
BitmapSource image = null;
switch (e.TransferType)
{
case XferMech.Native:
using (var stream = e.GetNativeImageStream())
{
if (stream != null)
{
image = stream.ConvertToWpfBitmap(300, 0);
}
}
break;
case XferMech.File:
image = new BitmapImage(new Uri(e.FileDataPath));
if (image.CanFreeze)
{
image.Freeze();
}
break;
case XferMech.Memory:
break;
}
return(image);
}
ImageSource GenerateThumbnail(DataTransferredEventArgs e)
{
BitmapSource img = null;
switch (e.TransferType)
{
case XferMech.Native:
using (var stream = e.GetNativeImageStream())
{
if (stream != null)
{
// file size
img = stream.ConvertToWpfBitmap();
}
}
break;
case XferMech.File:
img = new BitmapImage(new Uri(e.FileDataPath));
if (img.CanFreeze)
{
img.Freeze();
}
break;
case XferMech.Memory:
// TODO: build current image from multiple data-xferred event
break;
}
return(img);
}
private void OnDataTransferred(object sender, DataTransferredEventArgs e)
{
using (var output = Image.FromStream(e.GetNativeImageStream()))
{
_image = new Bitmap(output);
}
}
private void Session_DataTransferred(object sender, DataTransferredEventArgs e)
{
ImageSource image = GenerateThumbnail(e);
if (image != null)
{
System.Windows.Application.Current.Dispatcher.BeginInvoke(new Action(() =>
{
CapturedImages.Add(image);
}));
}
}
void Session_DataTransferred(object sender, DataTransferredEventArgs e)
{
ImageSource img = GenerateThumbnail(e);
if (img != null)
{
App.Current.Dispatcher.BeginInvoke(new Action(() =>
{
CapturedImages.Add(img);
SelectedImage = img;
ScannedDocument.UploadQueue.Add(img);
}));
}
}
void session_DataTransferred(object sender, DataTransferredEventArgs e)
{
theImage = null;
Stream s = e.GetNativeImageStream();
int len = (int)s.Length;
byte[] buffer = new byte[len];
s.Read(buffer, 0, len);
s.Close();
MemoryStream ms = new MemoryStream(buffer);
theImage = (Bitmap)Image.FromStream(ms);
pictureBox1.Image = theImage;
}
void _session_DataTransferred(object sender, DataTransferredEventArgs e)
{
BitmapSource img = GenerateThumbnail(e);
if (img != null)
{
App.Current.Dispatcher.BeginInvoke(new Action(() =>
{
CapturedImages.Add(img);
}));
//
}
}
static void DoImageXferredEventRoutine(ITwainSessionInternal session, IntPtr dataPtr, TWImageMemXfer memInfo, byte[] memData, string filePath, FileFormat format)
{
DataTransferredEventArgs args = null;
if (dataPtr != IntPtr.Zero)
{
args = new DataTransferredEventArgs(session.CurrentSource, dataPtr);
}
else if (memData != null)
{
args = new DataTransferredEventArgs(session.CurrentSource, memInfo, memData);
}
else
{
args = new DataTransferredEventArgs(session.CurrentSource, filePath, format);
}
session.SafeSyncableRaiseEvent(args);
}
BitmapSource GenerateThumbnail(DataTransferredEventArgs e)
{
BitmapSource img = null;
switch (e.TransferType)
{
case XferMech.Native:
using (var stream = e.GetNativeImageStream())
{
if (stream != null)
{
img = stream.ConvertToWpfBitmap(0, 0);
}
}
break;
case XferMech.File:
img = new BitmapImage(new Uri(e.FileDataPath));
if (img.CanFreeze)
{
img.Freeze();
}
break;
case XferMech.Memory:
// TODO: build current image from multiple data-xferred event
break;
}
//if (img != null)
//{
// // from http://stackoverflow.com/questions/18189501/create-thumbnail-image-directly-from-header-less-image-byte-array
// var scale = MaxThumbnailSize / img.PixelWidth;
// var transform = new ScaleTransform(scale, scale);
// var thumbnail = new TransformedBitmap(img, transform);
// img = new WriteableBitmap(new TransformedBitmap(img, transform));
// img.Freeze();
//}
return(img);
}
private static void DataTransferred(object sender, DataTransferredEventArgs e)
{
if (e.NativeData != IntPtr.Zero)
{
Console.WriteLine("SUCCESS! Got twain data on thread {0}.", Thread.CurrentThread.ManagedThreadId);
var stream = e.GetNativeImageStream();
if (stream != null)
{
byte[] bytes;
using (var ms = new System.IO.MemoryStream())
{
stream.CopyTo(ms);
bytes = ms.ToArray();
}
string base64 = Convert.ToBase64String(bytes);
_socket.Send($"data:image/jpeg;base64,{base64}");
}
}
else
{
Console.WriteLine("FAILURE! No twain data on thread {0}.", Thread.CurrentThread.ManagedThreadId);
}
}
private void SharpDataTransferred(object sender, DataTransferredEventArgs e)
{
Log(string.Format("{0} {1}", e.Sent ? "> " : "< ", e.Message));
}
private void Session_DataTransferred(object sender, DataTransferredEventArgs e)
{
Image img = Image.FromStream(e.GetNativeImageStream());
images.Add(img);
}
void SharpDataTransferred(object sender, DataTransferredEventArgs e)
{
logTextBox.AppendText(string.Format("{0} {1} \r\n", e.Sent ? "> " : "< ", e.Message));
}
