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PGM

exception Expect_P5
Raised if the magic number is not P5.
exception Expect_Maxval_255
Raised if the maxval is not 255.
function Read
Read a gray image from a portable graymap stream.
Param Type Description
in Stream Stream_Access 
 Read from this stream.
return Gray_Image_Access 
 The newly created image.
function Read
Read a gray image from a portable graymap file.
Param Type Description
in Filename String 
 Open a file with this name.
return Gray_Image_Access 
 The newly created image.
procedure Write
Write a gray image to a portable graymap stream.
Param Type Description
in Stream Stream_Access 
 Write to this stream.
access Image Gray_Image'Class 
 Write this image to the stream.
procedure Write
Write a gray image to a portable graymap file.
Param Type Description
in Filename String 
 Create a file with this name.
access Image Gray_Image'Class 
 Write this image to the file.
procedure Write
Write a gray image to a portable graymap file on standard output.
Param Type Description
access Image Gray_Image'Class 
 Write this image to stdout.
exceptions
Expect_P5
Expect_Maxval_255
methods
Read
Read
Write
Write
Write