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-- $Date: 2003/12/30 04:54:08 $
-- $Revision: 1.6 $
-- $Author: jcrocholl $
with Ada.Streams.Stream_IO; use Ada.Streams.Stream_IO;
package PNM is
-- A string of 2 characters. Used for magic numbers in PNM files.
subtype String2 is String(1 .. 2);
----------------------
-- Headers with Maxval
----------------------
-- Read a PNM file header, with Maxval (for PGM and PPM).
procedure Read_Header
(Stream : in Stream_Access; -- Read from this stream.
Magic : out String2; -- Magic number for PNM file type.
Width : out Positive; -- Width of the image in pixels.
Height : out Positive; -- Height of the image in pixels.
Maxval : out Positive); -- Maximum pixel component value.
-- Write a PNM file header, with Maxval (for PGM and PPM).
procedure Write_Header
(Stream : in Stream_Access; -- Write to this stream.
Magic : in String2; -- Magic number for PNM file type.
Width : in Positive; -- Width of the image in pixels.
Height : in Positive; -- Height of the image in pixels.
Maxval : in Positive); -- Maximum pixel component value.
-------------------------
-- Headers without Maxval
-------------------------
-- Read a PNM file header, without Maxval (for PBM).
procedure Read_Header
(Stream : in Stream_Access; -- Read from this stream.
Magic : out String2; -- Magic number for PNM file type.
Width : out Positive; -- Width of the image in pixels.
Height : out Positive); -- Height of the image in pixels.
-- Write a PNM file header, without Maxval (for PBM).
procedure Write_Header
(Stream : in Stream_Access; -- Write to this stream.
Magic : in String2; -- Magic number for PNM file type.
Width : in Positive; -- Width of the image in pixels.
Height : in Positive); -- Height of the image in pixels.
end PNM;