How to convert icon to png with alpha transparency in delphi?

Question

The code below will extract icon from file and convert it to png but without alpha transparency ?

var
   IconIndex : word;
   icon:TIcon;
   png:TPngImage;
   bm         


        

Answer 1

The PngComponents contain a unit PngFunctions.pas, where you can have a look at

procedure ConvertToPNG(Source: TGraphic; out Dest: TPngImage);

There you can find the code to convert a TIcon into a TPngImage - or just use that procedure.