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% fixpdfmag.tex
% Author: Javier Bezos, 2007
%
% This is Public Domain. You are free to use, copy, modify,
% distribute or whatever you want without restrictions. It is
% unsupported, so please, do not contact the author, just
% modify the file.
%
% Unfortunately, pdftex has changed recently its behaviour and
% now the page size is affected by \magnification, usually not a
% wanted effect. It has been proposed to modify Plain TeX when
% used with pdftex, by making a few changes in the pdftex.ini
% file, but many people do not know or simply do not want to
% modify Plain TeX or a custom made format. This file provides
% an alternative which requires to modify the documents, as
% the following example illustrates:
%
% \magnification3000
% \input fixpdfmag % <- after \magnification
%
% Hello
% \bye
%
% If you are using a custom page size, it is preserved,
% as it just converts pt units to truept ones.
\ifx\pdfpageheight\undefined\else
\begingroup
\catcode`\@=11
\global\pdfpageheight\expandafter\getf@ctor\the\pdfpageheight truept
\global\pdfpagewidth\expandafter\getf@ctor\the\pdfpagewidth truept
\global\pdfhorigin\expandafter\getf@ctor\the\pdfhorigin truept
\global\pdfvorigin\expandafter\getf@ctor\the\pdfvorigin truept
\endgroup
\fi
\endinput
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