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Implemented memory-file transfer.

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soukoku
2014-04-07 19:21:33 -04:00
parent 05e4eb8504
commit 2820cf7a8d
9 changed files with 88 additions and 49 deletions
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96
NTwain/TwainSession.cs
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@@ -869,11 +869,19 @@ namespace NTwain
private void DoImageMemoryXfer()
{
throw new NotImplementedException();
}
private void DoImageMemoryFileXfer()
{
// since it's memory-file xfer need info from both (maybe)
TWSetupMemXfer memInfo;
if (DGControl.SetupMemXfer.Get(out memInfo) == ReturnCode.Success)
TWSetupFileXfer fileInfo;
if (DGControl.SetupMemXfer.Get(out memInfo) == ReturnCode.Success &&
DGControl.SetupFileXfer.Get(out fileInfo) == ReturnCode.Success)
{
TWImageMemXfer xferInfo = new TWImageMemXfer();
var tempFile = Path.GetTempFileName();
string finalFile = null;
try
{
xferInfo.Memory = new TWMemory
@@ -882,18 +890,75 @@ namespace NTwain
TheMem = MemoryManager.Instance.Allocate(memInfo.Preferred)
};
var xrc = ReturnCode.Success;
do
using (var outStream = File.OpenWrite(tempFile))
{
xrc = DGImage.ImageMemXfer.Get(xferInfo);
if (xrc == ReturnCode.XferDone)
do
{
xrc = DGImage.ImageMemFileXfer.Get(xferInfo);
if (xrc == ReturnCode.Success ||
xrc == ReturnCode.XferDone)
{
byte[] buffer = new byte[(int)xferInfo.BytesWritten];
Marshal.Copy(xferInfo.Memory.TheMem, buffer, 0, buffer.Length);
outStream.Write(buffer, 0, buffer.Length);
}
} while (xrc == ReturnCode.Success);
}
if (xrc == ReturnCode.XferDone)
{
switch (fileInfo.Format)
{
case FileFormat.Bmp:
finalFile = Path.ChangeExtension(tempFile, ".bmp");
break;
case FileFormat.Dejavu:
finalFile = Path.ChangeExtension(tempFile, ".dejavu");
break;
case FileFormat.Exif:
finalFile = Path.ChangeExtension(tempFile, ".exit");
break;
case FileFormat.Fpx:
finalFile = Path.ChangeExtension(tempFile, ".fpx");
break;
case FileFormat.Jfif:
finalFile = Path.ChangeExtension(tempFile, ".jpg");
break;
case FileFormat.Jp2:
finalFile = Path.ChangeExtension(tempFile, ".jp2");
break;
case FileFormat.Jpx:
finalFile = Path.ChangeExtension(tempFile, ".jpx");
break;
case FileFormat.Pdf:
case FileFormat.PdfA:
case FileFormat.PdfA2:
finalFile = Path.ChangeExtension(tempFile, ".pdf");
break;
case FileFormat.Pict:
finalFile = Path.ChangeExtension(tempFile, ".pict");
break;
case FileFormat.Png:
finalFile = Path.ChangeExtension(tempFile, ".png");
break;
case FileFormat.Spiff:
finalFile = Path.ChangeExtension(tempFile, ".spiff");
break;
case FileFormat.Tiff:
case FileFormat.TiffMulti:
finalFile = Path.ChangeExtension(tempFile, ".tif");
break;
case FileFormat.Xbm:
finalFile = Path.ChangeExtension(tempFile, ".xbm");
break;
default:
finalFile = Path.ChangeExtension(tempFile, ".unknown");
break;
}
} while (xrc == ReturnCode.Success);
File.Move(tempFile, finalFile);
}
}
finally
{
@@ -901,16 +966,19 @@ namespace NTwain
{
MemoryManager.Instance.Free(xferInfo.Memory.TheMem);
}
if (File.Exists(tempFile))
{
File.Delete(tempFile);
}
}
if (File.Exists(finalFile))
{
OnDataTransferred(new DataTransferredEventArgs(IntPtr.Zero, finalFile));
}
}
}
private void DoImageMemoryFileXfer()
{
// no way to test, not supported by sample source
throw new NotImplementedException();
}
#endregion
#endregion