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Date Posted: 20:44:17 06/03/03 Tue
Author: Michel
Subject: Re: Graphic Size after Load
In reply to: Kai 's message, "Re: Graphic Size after Load" on 23:46:38 06/02/03 Mon

Hi Kai,

TDibGraphic is an abstract class, so you should create the derived class instead,

for example,

DibGraphic := TBitmapGraphic.Create;
DibGraphic.LoadFromFile( 'your.bmp' );

A TDibGraphic instance does not know how to read any format. In version 2 there is function,

function NewDibGraphic( const FileName : String ) : TDibGraphic;

which will create a TDibGraphic derived class that can read the format specified in FileName.

Best regards,


>to rule out the possibility that v1.10 is the culprit,
>I just downloaded v2.0 and installed it (after
>uninstalling all other graf libs I had).
>I receive a size of '0 x 0' from the snippet below and
>its saves out a 0 byte file.
>procedure TForm1.Button1Click(Sender: TObject);
> dibgr: TDIBGraphic;
> dibgr := TDIBGraphic.Create;
> dibgr.LoadFromFile( 'c:\windows\setup.bmp');
> showmessage( IntToStr( dibgr.Width) + ' x ' +
>IntToStr( dibgr.Height));
> dibgr.SaveToFile('c:\newname.bmp');
> dibgr.Free;

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