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+
+
+-- Programmed by Jedidiah Barber
+-- Released into the public domain
+
+
+with
+
+ Ada.Strings.Fixed,
+ Ada.Strings.Unbounded,
+ Ada.Unchecked_Deallocation,
+ FLTK.Images.Pixmaps,
+ Interfaces.C.Strings;
+
+
+package body FLTK.Pixmap_Marshal is
+
+
+ package SU renames Ada.Strings.Unbounded;
+ package Pix renames FLTK.Images.Pixmaps;
+ package C renames Interfaces.C;
+ package CS renames Interfaces.C.Strings;
+
+
+
+
+ function To_Coltype
+ (Value : in Pix.Color_Kind)
+ return Character is
+ begin
+ case Value is
+ when Pix.Colorful => return 'c';
+ when Pix.Monochrome => return 'm';
+ when Pix.Greyscale => return 'g';
+ when Pix.Symbolic => return 's';
+ end case;
+ end To_Coltype;
+
+
+
+
+ function Marshal_Data
+ (Values : in Pix.Header;
+ Colors : in Pix.Color_Definition_Array;
+ Pixels : in Pix.Pixmap_Data)
+ return chars_ptr_array_access
+ is
+ C_Data : chars_ptr_array_access := new CS.chars_ptr_array
+ (1 .. C.size_t (1 + Colors'Length + Pixels'Length (1)));
+ begin
+ -- Header values line
+ C_Data (1) := CS.New_String (Ada.Strings.Fixed.Trim
+ ((Positive'Image (Values.Width) & Positive'Image (Values.Height) &
+ Positive'Image (Values.Colors) & Positive'Image (Values.Per_Pixel)),
+ Ada.Strings.Left));
+
+ -- Color definition lines
+ for Place in 1 .. Colors'Length loop
+ C_Data (C.size_t (Place + 1)) := CS.New_String
+ (SU.To_String (Colors (Colors'First + Place - 1).Name) & " " &
+ To_Coltype (Colors (Colors'First + Place - 1).Kind) & " " &
+ SU.To_String (Colors (Colors'First + Place - 1).Value));
+ end loop;
+
+ -- Pixel data lines
+ for Place in 1 .. Pixels'Length (1) loop
+ declare
+ Line : String (1 .. Pixels'Length (2));
+ for Line'Address use Pixels (Pixels'First (1) + Place - 1, 1)'Address;
+ pragma Import (Ada, Line);
+ begin
+ C_Data (C.size_t (Place + 1 + Colors'Length)) := CS.New_String (Line);
+ end;
+ end loop;
+
+ return C_Data;
+ end Marshal_Data;
+
+
+
+
+ procedure Free is new Ada.Unchecked_Deallocation
+ (Interfaces.C.Strings.chars_ptr_array, chars_ptr_array_access);
+
+ procedure Free_Recursive
+ (This : in out chars_ptr_array_access) is
+ begin
+ if This /= null then
+ for Item of This.all loop
+ CS.Free (Item);
+ end loop;
+ Free (This);
+ end if;
+ end Free_Recursive;
+
+
+end FLTK.Pixmap_Marshal;
+
+