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Date Posted: 07:01:45 08/30/00 Wed
Author: Michel
Subject: Re: making tiff smaller results in Small Black Rectangle (SBR)
In reply to: Tobias 's message, "making tiff smaller results in Small Black Rectangle (SBR)" on 06:12:28 08/29/00 Tue


Hi Tobias,

Thank you for reporting this. There is a problem with the new RowsPerStrip property not being assigned when the TTiffGraphic is not loaded from a file. In your example, add,

tiffDest.RowsPerStrip := tiffpic.RowsPerStrip;

before saving the tiffDest.

I will have this corrected shortly in the TTiffGraphic class.

Best regards,

Michel


> Hi,
> when resizing a tiff image to a smaller size with the
> code shown below, the output is a small black (or
> speckled) rectangle, depending on the size. Im
> working on a tiff support for a thumbnailer, and its
> no alternative to convert the tiff to a jpg first and
> resize it then, eighter. resizing jpgs with a jpg
> source file works fine. is there a solution for this ?
>
> procedure TForm1.Button1Click(Sender: TObject);
> var tiffpic, tiffdest : TTiffGraphic;
> Resize : TResizeTransform;
> begin
> if Opendialog1.Execute
> then begin
> tiffpic := TTiffGraphic.Create;
> tiffpic.LoadFromFile(opendialog1.Filename);
> resize := TResizeTransform.Create;
> tiffdest := TTiffGraphic.Create;
> Resize := TResizeTransform.Create;
> try
> Resize.Width := 95;
> Resize.Height := 65;
> //TRY WIDTH := 90, HEIGHT := 69 AND BE
> SURPRISED !
>
> Resize.ApplyOnDest(tiffpic, tiffdest);
> finally
> Resize.Free;
> end; //finally
> tiffdest.SaveToFile('c:\bilder\knurz.tif');
> tiffpic.Free;
> //tiffdest.Free;
>
> end;
> end;

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