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-- $Date: 2004/03/04 05:13:21 $
-- $Revision: 1.3 $
-- $Author: jcrocholl $
with Ada.Exceptions; use Ada.Exceptions;
with PNM; use PNM;
package body PBM is
PBM_Magic : constant String := "P4";
-- Read a PBM header from a stream.
procedure Read_Header
(Stream : in Stream_Access; -- Read from this stream.
Width : out Positive; -- Width of image in pixels.
Height : out Positive) -- Height of image in pixels.
is
Magic : String2;
begin
Read_Header(Stream, Magic, Width, Height);
if Magic /= PBM_Magic then
Raise_Exception(Expect_P4'Identity,
"not a PBM file: expected """ & PBM_Magic &
""" but found """ & Magic & """");
end if;
end Read_Header;
-- Write a PBM header to a stream.
procedure Write_Header
(Stream : in Stream_Access; -- Write to this stream.
Width : in Positive; -- Width of image in pixels.
Height : in Positive) is -- Height of image in pixels.
begin
Write_Header(Stream, PBM_Magic, Width, Height);
end Write_Header;
end PBM;