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 TImageEnMIO.SaveToFileTIFF randomly working		  New Topic  Reply to Topic
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aleatprog

135 Posts
Posted - Oct 24 2020 :  11:34:29  Show Profile  Reply
Occasionally, the usage of TImageEnMIO.SaveToFileTIFF(FileName, True) or TImageEnMIO.SaveToFile(FileName, ioTIFF, True) generates an incomplete, 174 byte sized TIF File which can't be opened.

Curious: Without closing the application and after saving the TImageEnMView Bitmaps in other formats (e.g. JPG, PDF) the saving in TIF format finally succeeds.

Has anyone made a similar experience with TImageEnMIO.SaveToFileTIFF and got a workaround to fix this behaviour?

Al

ImageEn 9.2
Delphi 10.3

xequte

38616 Posts
Posted - Oct 25 2020 :  01:11:55  Show Profile  Reply
Hi Al

Sounds like some kind of drive caching issue. Does it only happen on a particular drive? What about when you test on an external hard drive?



Nigel
Xequte Software
www.imageen.com
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aleatprog

135 Posts
Posted - Oct 25 2020 :  07:37:28  Show Profile  Reply
I made a quite simple test with some buttons, each to save the TImageEnMView bitmaps in a different format (TIF, JPG).

After opening the app and loading a few bitmaps in TImageEnMView, saving one or more of them as TIF fails. If then (with the same app still open, therefore the same hardware conditions) I save the bitmaps as JPG (works correctly) and retry to save them as TIF, the TIF saving succeeds. It seems as if saving a single bitmap as JPG corrects something. In fact, if TImageEnMView contains only one bitmap, TIF saving works correctly right from the start.

Al
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xequte

38616 Posts
Posted - Oct 25 2020 :  16:08:08  Show Profile  Reply
Hi Al

Please email me the source for this demo.



Nigel
Xequte Software
www.imageen.com
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xequte

38616 Posts
Posted - Oct 25 2020 :  23:04:07  Show Profile  Reply
I tried to reproduce as follows, but did not experience any issues:

  ImageEnMView1.AppendImage('D:\im.jpg');
  ImageEnMView1.AppendImage('D:\alpha.png');
  ImageEnMView1.AppendImage('D:\im2.jpg');
  ImageEnMView1.AppendImage('D:\im3.jpg');
  ImageEnMView1.AppendImage('D:\wic.bmp');

  for I := 1 to 50 do
  begin
    fn := 'D:\test'+IntToStr(Random(10000))+'.tif';
    ImageEnMView1.MIO.SaveToFileTIFF( fn );
  end;


Nigel
Xequte Software
www.imageen.com
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