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diff --git a/tex/generic/context/luatex/luatex-pdf.tex b/tex/generic/context/luatex/luatex-pdf.tex
new file mode 100644
index 000000000..49ca9c2d6
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+++ b/tex/generic/context/luatex/luatex-pdf.tex
@@ -0,0 +1,179 @@
+% This is a pdftex compatibility file. We could use \ifprimitive instead.
+
+\begingroup
+
+\catcode`\{ = 1 % left  brace is begin-group character
+\catcode`\} = 2 % right brace is end-group   character
+
+\ifdefined\pdfextension
+
+    % promoted
+
+    \global\let\pdfpagewidth      \pagewidth
+    \global\let\pdfpageheight     \pageheight
+
+    \global\let\pdfadjustspacing  \adjustspacing
+    \global\let\pdfprotrudechars  \protrudechars
+    \global\let\pdfnoligatures    \ignoreligaturesinfont
+    \global\let\pdffontexpand     \expandglyphsinfont
+    \global\let\pdfcopyfont       \copyfont
+
+    \global\let\pdfxform          \saveboxresource
+    \global\let\pdflastxform      \lastsavedboxresourceindex
+    \global\let\pdfrefxform       \useboxresource
+
+    \global\let\pdfximage         \saveimageresource
+    \global\let\pdflastximage     \lastsavedimageresourceindex
+    \global\let\pdflastximagepages\lastsavedimageresourcepages
+    \global\let\pdfrefximage      \useimageresource
+
+    \global\let\pdfsavepos        \savepos
+    \global\let\pdflastxpos       \lastxpos
+    \global\let\pdflastypos       \lastypos
+
+    \global\let\pdftexversion     \luatexversion
+    \global\let\pdftexrevision    \luatexrevision
+    \global\let\pdftexbanner      \luatexbanner
+
+    \global\let\pdfoutput         \outputmode
+    \global\let\pdfdraftmode      \draftmode
+
+    \global\let\pdfpxdimen        \pxdimen
+
+    \global\let\pdfinsertht       \insertht
+
+    % also promoted
+
+  % \global\let\pdfnormaldeviate  \normaldeviate
+  % \global\let\pdfuniformdeviate \uniformdeviate
+  % \global\let\pdfsetrandomseed  \setrandomseed
+  % \global\let\pdfrandomseed     \randomseed
+  %
+  % \let\pdfprimitive      \primitive
+  %
+  % \global\let\expandafter\csname    ifpdfabsnum\expandafter\endcsname\csname    ifabsnum\endcsname
+  % \global\let\expandafter\csname    ifpdfabsdim\expandafter\endcsname\csname    ifabsdim\endcsname
+  % \global\let\expandafter\csname ifpdfprimitive\expandafter\endcsname\csname ifprimitive\endcsname
+
+    % removed (also some others but already long ago)
+
+    \ifdefined\newdimen
+        \newdimen\pdfeachlineheight
+        \newdimen\pdfeachlinedepth
+        \newdimen\pdflastlinedepth
+        \newdimen\pdffirstlineheight
+        \newdimen\pdfignoreddimen
+    \fi
+
+    % commands
+
+    \protected\gdef\pdfliteral        {\pdfextension literal}
+    \protected\gdef\pdfcolorstack     {\pdfextension colorstack}
+    \protected\gdef\pdfsetmatrix      {\pdfextension setmatrix}
+    \protected\gdef\pdfsave           {\pdfextension save\relax}
+    \protected\gdef\pdfrestore        {\pdfextension restore\relax}
+    \protected\gdef\pdfobj            {\pdfextension obj }
+    \protected\gdef\pdfrefobj         {\pdfextension refobj }
+    \protected\gdef\pdfannot          {\pdfextension annot }
+    \protected\gdef\pdfstartlink      {\pdfextension startlink }
+    \protected\gdef\pdfendlink        {\pdfextension endlink\relax}
+    \protected\gdef\pdfoutline        {\pdfextension outline }
+    \protected\gdef\pdfdest           {\pdfextension dest }
+    \protected\gdef\pdfthread         {\pdfextension thread }
+    \protected\gdef\pdfstartthread    {\pdfextension startthread }
+    \protected\gdef\pdfendthread      {\pdfextension endthread\relax}
+    \protected\gdef\pdfinfo           {\pdfextension info }
+    \protected\gdef\pdfcatalog        {\pdfextension catalog }
+    \protected\gdef\pdfnames          {\pdfextension names }
+    \protected\gdef\pdfincludechars   {\pdfextension includechars }
+    \protected\gdef\pdffontattr       {\pdfextension fontattr }
+    \protected\gdef\pdfmapfile        {\pdfextension mapfile }
+    \protected\gdef\pdfmapline        {\pdfextension mapline }
+    \protected\gdef\pdftrailer        {\pdfextension trailer }
+    \protected\gdef\pdfglyphtounicode {\pdfextension glyphtounicode }
+
+    % converted
+
+    \gdef\pdftexversion       {\numexpr\pdffeedback version}
+    \gdef\pdftexrevision              {\pdffeedback revision}
+    \gdef\pdflastlink         {\numexpr\pdffeedback lastlink}
+    \gdef\pdfretval           {\numexpr\pdffeedback retval}
+    \gdef\pdflastobj          {\numexpr\pdffeedback lastobj}
+    \gdef\pdflastannot        {\numexpr\pdffeedback lastannot}
+    \gdef\pdfxformname        {\numexpr\pdffeedback xformname}
+    \gdef\pdfcreationdate             {\pdffeedback creationdate}
+    \gdef\pdffontname         {\numexpr\pdffeedback fontname}
+    \gdef\pdffontobjnum       {\numexpr\pdffeedback fontobjnum}
+    \gdef\pdffontsize         {\dimexpr\pdffeedback fontsize}
+    \gdef\pdfpageref          {\numexpr\pdffeedback pageref}
+    \gdef\pdfcolorstackinit           {\pdffeedback colorstackinit}
+
+    % registers
+
+    \xdef\pdfcompresslevel            {\pdfvariable compresslevel}
+    \xdef\pdfobjcompresslevel         {\pdfvariable objcompresslevel}
+    \xdef\pdfdecimaldigits            {\pdfvariable decimaldigits}
+    \xdef\pdfgamma                    {\pdfvariable gamma}
+    \xdef\pdfimageresolution          {\pdfvariable imageresolution}
+    \xdef\pdfimageapplygamma          {\pdfvariable imageapplygamma}
+    \xdef\pdfimagegamma               {\pdfvariable imagegamma}
+    \xdef\pdfimagehicolor             {\pdfvariable imagehicolor}
+    \xdef\pdfimageaddfilename         {\pdfvariable imageaddfilename}
+    \xdef\pdfpkresolution             {\pdfvariable pkresolution}
+    \xdef\pdfinclusioncopyfonts       {\pdfvariable inclusioncopyfonts}
+    \xdef\pdfinclusionerrorlevel      {\pdfvariable inclusionerrorlevel}
+    \xdef\pdfreplacefont              {\pdfvariable replacefont}
+    \xdef\pdfgentounicode             {\pdfvariable gentounicode}
+    \xdef\pdfpagebox                  {\pdfvariable pagebox}
+    \xdef\pdfminorversion             {\pdfvariable minorversion}
+    \xdef\pdfuniqueresname            {\pdfvariable uniqueresname}
+
+    \xdef\pdfhorigin                  {\pdfvariable horigin}
+    \xdef\pdfvorigin                  {\pdfvariable vorigin}
+    \xdef\pdflinkmargin               {\pdfvariable linkmargin}
+    \xdef\pdfdestmargin               {\pdfvariable destmargin}
+    \xdef\pdfthreadmargin             {\pdfvariable threadmargin}
+
+    \xdef\pdfpagesattr                {\pdfvariable pagesattr}
+    \xdef\pdfpageattr                 {\pdfvariable pageattr}
+    \xdef\pdfpageresources            {\pdfvariable pageresources}
+    \xdef\pdfxformattr                {\pdfvariable xformattr}
+    \xdef\pdfxformresources           {\pdfvariable xformresources}
+    \xdef\pdfpkmode                   {\pdfvariable pkmode}
+
+    % initializations
+
+    \global\pdfcompresslevel         9
+    \global\pdfobjcompresslevel      1
+    \global\pdfdecimaldigits         3
+    \global\pdfgamma              1000
+    \global\pdfimageresolution      71
+    \global\pdfimageapplygamma       0
+    \global\pdfimagegamma         2200
+    \global\pdfimagehicolor          1
+    \global\pdfimageaddfilename      1
+    \global\pdfpkresolution         72
+    \global\pdfinclusioncopyfonts    0
+    \global\pdfinclusionerrorlevel   0
+    \global\pdfreplacefont           0
+    \global\pdfgentounicode          0
+    \global\pdfpagebox               0
+    \global\pdfminorversion          4
+    \global\pdfuniqueresname         0
+
+    \global\pdfhorigin             1in
+    \global\pdfvorigin             1in
+    \global\pdflinkmargin          0pt
+    \global\pdfdestmargin          0pt
+    \global\pdfthreadmargin        0pt
+
+    % maybe
+
+  % \global\chardef\pdftexversion  140
+  % \global\def    \pdftexrevision {16}
+
+\fi
+
+\endgroup
+
+\endinput