[Lazarus] How to create a transparent PNG?

[Vojtěch Čihák]

Hi,
 
there also must be
 
P.Canvas.Brush.Style:=bsClear;
 
before drawing text.
 
V.
______________________________________________________________
> Od: Gabor Boros <gaborboros at yahoo.com>
> Komu: <lazarus at lists.lazarus.freepascal.org>
> Datum: 16.03.2016 20:27
> Předmět: [Lazarus] How to create a transparent PNG?
>
Hi All,

I want to draw onto a PNG image and save it without background. Tried 
Transparent, TransparentColor, TransparentMode properties without 
success. I need the A character in the PNG with black color without 
background. Any idea?

procedure PNG;
var
   P:TPortableNetworkGraphic;
begin
   P:=TPortableNetworkGraphic.Create;
   P.SetSize(20,20);
   P.Canvas.TextOut(0,0,'A');
   P.SaveToFile('TEST.PNG');
   P.Free;
end;

Gabor

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