[tex-live] Seemingly inexplicable shift in page origin between TL 2014 and TL 2016

[Philip Taylor]

I have just installed TeX Live 2016 for the first time, using the "small" scheme and a couple of additional options, but I find when I try to re-generate /The Oral History of Horsmonden/ that the entire page image has been displaced vertically upwards by about 1 true in.  I append the code that does the necessary computation of dimensions, and wonder whether anyone can identify what has changed between the two releases.

% !TeX Program=XeTeX
% !TeX Root = Oral-History.TeX

\magnification 1000

\special {pdf: docview << /PageLayout /TwoPageRight >>}
\special {pdf: docview << /OpenAction [0 /Fit] >>}

\newdimen \innermargin
\newdimen \outermargin
\newdimen \uppermargin
\newdimen \lowermargin
\newdimen \cropwidth
\newdimen \cropheight
\newdimen \cropmark
\newdimen \cropmitre
\newdimen \Knuthoffset

\innermargin = 0,618 true in
\outermargin = 1,0 true in
\uppermargin = \dimexpr (\innermargin + \outermargin) / 2 \relax
\lowermargin = \uppermargin
\Knuthoffset = 1 in

\def \imagepath {}

\hsize = 176 true mm
\vsize = 250 true mm
\ifcropmarks
    \pdfpagewidth = 210 true mm
    \pdfpageheight = 297 true mm
\else
    \pdfpagewidth = \hsize
    \pdfpageheight = \vsize
\fi
\advance \hsize by -1.618 true in
\advance \vsize by -1.618 true in
\parindent = 0 pt

\advance \hoffset by \dimexpr -0.382 true in / 2 \relax
\advance \voffset by \dimexpr -0.382 true in / 2 \relax

\ifcropmarks
    \advance \hoffset by \dimexpr (210 true mm - 176 true mm) / 2 \relax
    \advance \voffset by \dimexpr (297 true mm - 250 true mm) / 2 \relax
\fi

\ifcropmarks
    \input Cropmarks
    \rvcropmarkstrue
   
    \rectotopcropmark = \dimexpr 1.618 true in / 2 \relax plus 1 cm minus -1 mm
    \rectobottomcropmark = \dimexpr 250 true mm - \rectotopcropmark \relax plus 1 cm minus -1 mm
    \rectoleftcropmark = 0,618 true in plus 1 cm minus -1 mm
    \rectorightcropmark = \dimexpr 176 true mm - \rectoleftcropmark  \relax plus 1 cm minus -1 mm
   
    \versotopcropmark = \rectotopcropmark
    \versobottomcropmark =\rectobottomcropmark
    \versoleftcropmark = 1,0 true in plus 1 cm minus -1 mm
    \versorightcropmark = \dimexpr 176 true mm - \versoleftcropmark  \relax plus 1 cm minus -1 mm
\fi

*\advance \voffset by 1 true in % REQUIRED ONLY F**OR **TL 2016*

-- 

Philip Taylor
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