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Date Posted: 17:17:48 07/05/00 Wed
Author: Seraj S Dhaliwal
Subject: Get Dibfailed with doing brightness or some transformations??

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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