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diff --git a/spec/fltk-images-rgb-png.ads b/spec/fltk-images-rgb-png.ads
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+
+
+--  Programmed by Jedidiah Barber
+--  Released into the public domain
+
+
+package FLTK.Images.RGB.PNG is
+
+
+    -------------
+    --  Types  --
+    -------------
+
+    type PNG_Image is new RGB_Image with private;
+
+    type PNG_Image_Reference (Data : not null access PNG_Image'Class) is limited null record
+        with Implicit_Dereference => Data;
+
+
+
+
+    --------------------
+    --  Construction  --
+    --------------------
+
+    package Forge is
+
+        function Create
+               (Filename : in String)
+            return PNG_Image;
+
+        function Create
+               (Name : in String := "";
+                Data : in Color_Component_Array)
+            return PNG_Image;
+
+    end Forge;
+
+
+private
+
+
+    type PNG_Image is new RGB_Image with null record;
+
+    overriding procedure Finalize
+           (This : in out PNG_Image);
+
+
+end FLTK.Images.RGB.PNG;
+