Aquileo | Recent changes to tickets

Aquileo | #12 Please provide a nuget package of your library

Thu, 13 Jul 2017 14:59:09 -0000

By necessity I put on the nuget, if you need, just look for the name "scanDrivers" by c.mendes

Aquileo | #4 Setup Scanner does not work in twancsscan (dialog freezes)

Wed, 08 Mar 2017 14:17:36 -0000

the bug is back in 2.3.2.0

Aquileo | TWAIN string aren't correctly handling localized content...

Fri, 02 Sep 2016 18:29:59 -0000

TWAIN strings (TW_STR32, TW_STR64, etc) don't correctly handle codepages on Windows, which causes problems when the contents pf those strings are localized. The code was using UTF8 encoding on Windows, and it was using strings when it should have been using byte arrays...

Aquileo | #18 Missing bitmap.Dispose() during XferMech File, Memory overflow

Fri, 02 Sep 2016 18:24:01 -0000

status: open --> pending
assigned_to: Mark

Aquileo | #19 OutOfMemoryException in call to WindowsTwaindsmDsmEntryUserinterface external method.

Fri, 02 Sep 2016 18:23:37 -0000

status: open --> pending
assigned_to: Mark

Aquileo | #12 Please provide a nuget package of your library

Wed, 24 Aug 2016 06:28:40 -0000

Hello,

do you already know when you will provide your library as a nuget-package?

Regards

mpaul

Aquileo | #11 Many Scanners don't work with this library

Mon, 21 Mar 2016 21:00:59 -0000

Hallo! Microsoft Live Cam is working now. Nikon Coolscan still crashes and if I embed the application in my vb.net app the library crashes on rollback state with Twain Sample Source.

Regards Hans

Aquileo | #11 Many Scanners don't work with this library

Mon, 21 Mar 2016 10:48:43 -0000

@Mark:

Is there anything that can eb further debugged? It would really be great if this issue could be resolved!

Aquileo | #19 OutOfMemoryException in call to WindowsTwaindsmDsmEntryUserinterface external method.

Thu, 28 Jan 2016 16:04:09 -0000

After intensive research, I found the solution so you can scan without getting memory overflow or OutOfMemoryException. Basically we need to dispose (Bitmap) and free resources (IntPtr). Basically the fixes should be done in two methods of the TWAIN class. Last advise is: Do not store each retrieved bitmap in a list in memory because it also takes a lot of memory

Class: TWAIN
Method: NativeToBitmap(Platform a_platform, IntPtr a:intptrNative)
Solution: Add these sentences after Bitmap bitmap = new Bitmap(bitmapStream);;

// Cleanup...
bitmapStream.Dispose();
memorystream.Dispose();

memorystream.Close();

bitmapStream = null;
memorystream = null;
bBitmap = null;

//D.T. 25/01/2015
DsmMemFree(ref intptrNative);

// Return our bitmap...
DsmMemUnlock(a_intptrNative);
return (bitmap);

Class: TWAIN
Method:STS DatImagenativexfer(DG a_dg, MSG a_msg, ref Bitmap a_bitmap)
Solution: The if (sts == STS.XFERDONE) block should look like this:

if (sts == STS.XFERDONE)
{
    // Bump our state...
    m_state = STATE.S7;

    // Turn the DIB into a Bitmap object...
    // D.T. 25/01/2015 : This method also takes between 40 and 50 MB 
    // that needs to be cleaned.

    a_bitmap = NativeToBitmap(ms_platform, intptrBitmap);

    // We're done with the data we got from the driver...

    //Marshal.FreeHGlobal(intptrBitmap);
    //intptrBitmap = IntPtr.Zero;

    DsmMemFree(ref intptrBitmap);
}

I'll write a more detailed and explained article on this, however not sure when but I will.
Thanks.
Diego Torres

Aquileo | OutOfMemoryException in call to WindowsTwaindsmDsmEntryUserinterface external method.

Tue, 19 Jan 2016 16:57:37 -0000

The DatImagenativexferWindowsTwainDsm() method in the TWAIN class makes a call to WindowsTwaindsmDsmEntryImagenativexfer that make the amount of ram to increase a lot. I scan in duplex mode (about 30 to 50 sheets/papers) and I always run out of memory.

Additional Details:

The method WindowsTwaindsmDsmEntryImagenativexfer is an external method located in "twaindsm.dll" so I don't know how to proceed and fix it.