% This is macro package used by OpTeX, see http://petr.olsak.net/optex \_codedecl \tikzpicture {TikZ for OpTeX <2021-07-15>} \_doc This package is \OpTeX/'s compatibility layer for PGF/TikZ. When users do `\load[tikz]` they expect `tikz.tex` to be loaded, but this file gets loaded instead. It does load `tikz.tex`, but also does fixups. First we load TikZ itself. \_cod \_input tikz.tex \_doc PGF's `\pgfutil@everybye` hooks into `\end`, but normally \OpTeX/ uses the prefixed `\_end`. Here we make it hook into `\_byehook` which should hopefully be preserved by all \OpTeX/ macro writers. \_cod \_addto\_byehook{\_the\_cs{pgfutil@everybye}} \_doc There is a general disagreement about the use/meaning of `\hoffset` and `\voffset` -- \LaTeX/, the \LaTeX/ `crop` package\fnote{\url{https://www.ctan.org/pkg/crop}}, TikZ, and \OpTeX/ all try to use the values differently. Unfortunately this means a broken behaviour observed by end users in \OpTeX/\fnote{\url{https://github.com/pgf-tikz/pgf/issues/983}}. The problem at hand is that PGF nowadays sets the page origin to include `\hoffset` and `\voffset`. We instead set it to the origin (i.e. the point $(0, 0)$). \_cod \_sdef{pgf@sys@pdf@mark@pos@pgfpageorigin}{\pgfpointorigin} \_endcode