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with
Interfaces.C,
System;
use type
System.Address;
package body FLTK.Images.RGB.PNG is
function new_fl_png_image
(F : in Interfaces.C.char_array)
return System.Address;
pragma Import (C, new_fl_png_image, "new_fl_png_image");
procedure free_fl_png_image
(P : in System.Address);
pragma Import (C, free_fl_png_image, "free_fl_png_image");
overriding procedure Finalize
(This : in out PNG_Image) is
begin
if This.Void_Ptr /= System.Null_Address and then
This in PNG_Image'Class
then
free_fl_png_image (This.Void_Ptr);
This.Void_Ptr := System.Null_Address;
end if;
Finalize (RGB_Image (This));
end Finalize;
package body Forge is
function Create
(Filename : in String)
return PNG_Image is
begin
return This : PNG_Image do
This.Void_Ptr := new_fl_png_image
(Interfaces.C.To_C (Filename));
case fl_image_fail (This.Void_Ptr) is
when 1 =>
raise No_Image_Error;
when 2 =>
raise File_Access_Error;
when 3 =>
raise Format_Error;
when others =>
null;
end case;
end return;
end Create;
end Forge;
end FLTK.Images.RGB.PNG;
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