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Date Posted: 20:34:10 07/05/00 Wed
Author: Michel
Subject: Re: Get Dibfailed with doing brightness or some transformations??
In reply to: Seraj S Dhaliwal 's message, "Get Dibfailed with doing brightness or some transformations??" on 17:17:48 07/05/00 Wed


Dear Seraj,

It is indeed strange. Usually, GetDib can fail when the image is very large. In your case, what is the size and image format?

Best regards,

Michel

> Below is the code it gives error "Get DIB Failed" if I
> perform it after another transformation action??
>
> procedure TfrmMain.IncreaseBrightness1Click(Sender:
> TObject);
> var lTransform: TBrightnessTransform;
> lUndoGraphic, lDestGraphic: TDibGraphic;
> begin
> {.. here we adjust the image to increase
> brightness ..}
> Screen.Cursor := crHourGlass;
> lUndoGraphic := TDibGraphic.Create;
> lDestGraphic := TDibGraphic.Create;
> lUndoGraphic.Assign(Image1.Picture.Graphic);
>
> lTransform := TBrightnessTransform.Create;
> try
> try
> lTransform.Percent := 3;
> lTransform.ApplyOnDest(lUndoGraphic,
> lDestGraphic);
> // ============= ERROR !! ERROR =============
> // above line results in error, after a emboss or
> other
> // transformation, but works fine if tried the first
> time??
> // look below for the emboss routine, it works fine
>
> Image1.Picture.Assign(lDestGraphic);
> finally
> lTransform.Free;
> lUndoGraphic.Free;
> lDestGraphic.Free;
>
> Screen.Cursor := crDefault;
> end;
> except
> end;
> end;
>
> procedure TfrmMain.btnIMGEmbossClick(Sender: TObject);
> var lTransform: TEmbossTransform;
> lUndoGraphic, lDestGraphic: TDibGraphic;
> begin
> {.. here we adjust the image to emboss ..}
> Screen.Cursor := crHourGlass;
> lUndoGraphic := TDibGraphic.Create;
> lDestGraphic := TDibGraphic.Create;
> lUndoGraphic.Assign(Image1.Picture.Graphic);
>
> lTransform := TEmbossTransform.Create;
> try
> try
> lTransform.ApplyOnDest(lUndoGraphic,
> lDestGraphic);
>
> Image1.Picture.Assign(lDestGraphic);
> finally
> lTransform.Free;
> lUndoGraphic.Free;
> lDestGraphic.Free;
>
> Screen.Cursor := crDefault;
> end;
> except
> end;
> end;

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