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authorKarl Berry <karl@freefriends.org>2019-05-02 22:51:31 +0000
committerKarl Berry <karl@freefriends.org>2019-05-02 22:51:31 +0000
commit4de7376b42147ed2246d7320e079bdebd84d9503 (patch)
treec84b6bf2943a50ce3651f54a5fd83a3918e8905e /Master/texmf-dist/source/latex/l3kernel/l3drivers.dtx
parentfc9aebc5bf923b3e26bd4157f786523ff49d2cbe (diff)
l3kernel (22apr19)
git-svn-id: svn://tug.org/texlive/trunk@50950 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/source/latex/l3kernel/l3drivers.dtx')
-rw-r--r--Master/texmf-dist/source/latex/l3kernel/l3drivers.dtx2971
1 files changed, 78 insertions, 2893 deletions
diff --git a/Master/texmf-dist/source/latex/l3kernel/l3drivers.dtx b/Master/texmf-dist/source/latex/l3kernel/l3drivers.dtx
index c7b6b85bc8f..687f8c93dd8 100644
--- a/Master/texmf-dist/source/latex/l3kernel/l3drivers.dtx
+++ b/Master/texmf-dist/source/latex/l3kernel/l3drivers.dtx
@@ -43,7 +43,7 @@
% }^^A
% }
%
-% \date{Released 2019-04-06}
+% \date{Released 2019-04-21}
%
% \maketitle
%
@@ -79,11 +79,13 @@
% concepts to be used corrected as they take \enquote{raw} arguments, similar
% in format to those used by the underlying driver.
%
-% The functions in this module should be regarded as experimental with
-% the following exceptions:
-% \begin{itemize}
-% \item \dots
-% \end{itemize}
+% Given the close coupling of these functions to higher-level interfaces, at
+% present the functions given here may change if this is useful for higher-level
+% changes. However, equivalent \emph{functionality} will be provided for any
+% higher-level function which is itself stable. For example,
+% \cs{driver_box_use_rotate:Nn} is needed to implement the stable box rotation
+% functions. As such, even if \cs{driver_box_use_rotate:Nn} were to be removed,
+% a replacement would be provided.
%
% \section{Box clipping}
%
@@ -167,7 +169,7 @@
%
% \section{Drawing}
%
-% The drawing functions provided here are \emph{highly} experimental. They
+% These functions
% are inspired heavily by the system layer of \pkg{pgf} (most have the
% same interface as the same functions in the latter's \cs{pgfsys@\ldots}
% namespace). They are intended to form the basis for higher level drawing
@@ -469,6 +471,52 @@
% are generated by \texttt{dvips}: this depends on being able to pass
% information through correctly.
%
+% \subsection{PDF Annotations}
+%
+% \begin{function}[added = 2019-04-10]
+% {\driver_pdf_annotation:nnnn}
+% \begin{syntax}
+% \cs{driver_pdf_annotation:nnnn} \Arg{width} \Arg{height} \Arg{depth} \Arg{dictionary}
+% \end{syntax}
+% Creates a generic PDF annotation of the given \meta{height}, \meta{width}
+% and \meta{depth} and featuring the \meta{dictionary}.
+% \end{function}
+%
+% \begin{function}[added = 2019-04-17]
+% {
+% \driver_pdf_link_begin_goto:nnw,
+% \driver_pdf_link_begin_user:nnw,
+% \driver_pdf_link_end:
+% }
+% \begin{syntax}
+% \cs{driver_pdf_link_begin_user:nnw} \Arg{attributes} \Arg{action}
+% \Arg{content}
+% \cs{driver_pdf_link_end:}
+% \end{syntax}
+% Creates a link of the \meta{type} |goto| or |user| with the given
+% \meta{attributes}, points toward the \meta{action} and surround the
+% \TeX{} \meta{content}. The |begin| and |end| functions must be given
+% at the same box level. Depending upon the back-end in use, the
+% \meta{content} may be placed in a hbox as part of processing.
+% \end{function}
+%
+% \begin{function}[EXP, added = 2019-04-09]{\driver_pdf_link_last:}
+% \begin{syntax}
+% \cs{driver_pdf_link_last:}
+% \end{syntax}
+% Expands to the object reference
+% \end{function}
+%
+% \begin{function}[EXP, added = 2019-04-11]{\driver_pdf_link_margin:n}
+% \begin{syntax}
+% \cs{driver_pdf_link_margin:} \Arg{dimen}
+% \end{syntax}
+% Sets the length of the margin between content and the border of a link.
+% Different back-ends treat the scoping of this value in different ways:
+% \pdfTeX{} and \LuaTeX{} treat it as scoped by \TeX{}, whilst with
+% \texttt{dvips} the scope is managed at the PostScript level.
+% \end{function}
+%
% \subsection{PDF Objects}
%
% Objects are used to provide a range of data structures in a PDF. At the
@@ -533,2898 +581,35 @@
% be set only once.
% \end{function}
%
+% \begin{function}[EXP, added = 2019-04-11]
+% {\driver_pdf_version_major:, \driver_pdf_version_minor:}
+% \begin{syntax}
+% \cs{driver_pdf_version_major:}
+% \cs{driver_pdf_version_minor:}
+% \end{syntax}
+% Expands to the current value of the major or minor version of PDF being
+% created, a non-negative integer. Where a value is not available at the
+% \TeX{} run level, the result is $-1$. (This is necessary as the minor
+% version may be $0$.)
+% \end{function}
+%
+% \begin{function}[EXP, added = 2019-04-11]
+% {\driver_pdf_version_major_gset:n, \driver_pdf_version_minor_gset:n}
+% \begin{syntax}
+% \cs{driver_pdf_version_major_gset:n} \Arg{integer}
+% \cs{driver_pdf_version_minor_gset:n} \Arg{integer}
+% \end{syntax}
+% Sets the PDF version as specified: the allowable range is not checked
+% at this level.
+% \end{function}
+%
% \end{documentation}
%
% \begin{implementation}
%
% \section{\pkg{l3drivers} Implementation}
%
-% \begin{macrocode}
-%<*initex|package>
-%<@@=driver>
-% \end{macrocode}
-%
-% Whilst there is a reasonable amount of code overlap between drivers,
-% it is much clearer to have the blocks more-or-less separated than run
-% in together and DocStripped out in parts. As such, most of the following
-% is set up on a per-driver basis, though there is some common code (again
-% given in blocks not interspersed with other material).
-%
-% All the file identifiers are up-front so that they come out in the right
-% place in the files.
-% \begin{macrocode}
-%<*package>
-\ProvidesExplFile
-%<*dvipdfmx>
- {l3dvipdfmx.def}{2019-04-06}{}
- {L3 Experimental driver: dvipdfmx}
-%</dvipdfmx>
-%<*dvips>
- {l3dvips.def}{2019-04-06}{}
- {L3 Experimental driver: dvips}
-%</dvips>
-%<*dvisvgm>
- {l3dvisvgm.def}{2019-04-06}{}
- {L3 Experimental driver: dvisvgm}
-%</dvisvgm>
-%<*pdfmode>
- {l3pdfmode.def}{2019-04-06}{}
- {L3 Experimental driver: PDF mode}
-%</pdfmode>
-%<*xdvipdfmx>
- {l3xdvipdfmx.def}{2019-04-06}{}
- {L3 Experimental driver: xdvipdfmx}
-%</xdvipdfmx>
-%</package>
-% \end{macrocode}
-%
-% The order of the driver code here is such that we get somewhat logical
-% outcomes in terms of code sharing whilst keeping things readable. (Trying to
-% mix all of the code by concept is almost unmanageable.) The key parts which
-% are shared are
-% \begin{itemize}
-% \item Color support is either \texttt{dvips}-like or \texttt{pdfmode}-like.
-% \item \texttt{pdfmode} and \texttt{(x)dvipdfmx} share drawing routines.
-% \item \texttt{xdvipdfmx} is largely the same as \texttt{dvipdfmx} so
-% takes most of the same code.
-% \end{itemize}
-%
-% \begin{macro}{\@@_literal:e, \@@_literal:n, \@@_literal:x}
-% The one shared function for all drivers is access to the basic
-% \tn{special} primitive: it has slightly odd expansion behaviour
-% so a wrapper is provided.
-% \begin{macrocode}
-\cs_new_eq:NN \@@_literal:e \tex_special:D
-\cs_new_protected:Npn \@@_literal:n #1
- { \@@_literal:e { \exp_not:n {#1} } }
-\cs_generate_variant:Nn \@@_literal:n { x }
-% \end{macrocode}
-% \end{macro}
-%
-% \subsection{Color support}
-%
-% Color support is split into two parts: a \enquote{general} concept and
-% one directly linked to drawings (or rather the split between filling
-% and stroking). General color is relatively easy to handle: we have a color
-% stack available with all modern drivers, and can use that.%
-% Whilst \texttt{(x)dvipdfmx} does have its own approach to color specials,
-% it is easier to use \texttt{dvips}-like ones for all cases except direct
-% PDF output.
-%
-% \subsubsection{\texttt{dvips}-style}
-%
-% \begin{macrocode}
-%<*dvisvgm|dvipdfmx|dvips|xdvipdfmx>
-% \end{macrocode}
-%
-% \begin{macro}{\driver_color_pickup:N}
-% \begin{macro}{\@@_color_pickup:w}
-% Allow for \LaTeXe{} color. Here, the possible input values are limited:
-% \texttt{dvips}-style colors can mainly be taken as-is with the exception
-% spot ones (here we need a model and a tint).
-% \begin{macrocode}
-%<*package>
-\cs_new_protected:Npn \driver_color_pickup:N #1 { }
-\AtBeginDocument
- {
- \@ifpackageloaded { color }
- {
- \cs_set_protected:Npn \driver_color_pickup:N #1
- {
- \exp_args:NV \tl_if_head_is_space:nTF \current@color
- {
- \tl_set:Nx #1
- {
- spot ~
- \exp_after:wN \use:n \current@color \c_space_tl 1
- }
- }
- {
- \exp_last_unbraced:Nx \@@_color_pickup:w
- { \current@color } \q_stop #1
- }
- }
- \cs_new_protected:Npn \@@_color_pickup:w #1 ~ #2 \q_stop #3
- { \tl_set:Nn #3 { #1 ~ #2 } }
- }
- { }
- }
-%</package>
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_color_cmyk:nnnn}
-% \begin{macro}{\driver_color_gray:n}
-% \begin{macro}{\driver_color_rgb:nnn}
-% \begin{macro}{\driver_color_spot:nn}
-% \begin{macro}{\@@_color_select:n, \@@_color_select:x}
-% \begin{macro}{\@@_color_reset:}
-% Push the data to the stack. In the case of \texttt{dvips} also reset the
-% drawing fill color in raw PostScript.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_color_cmyk:nnnn #1#2#3#4
- {
- \@@_color_select:x
- {
- cmyk~
- \fp_eval:n {#1} ~ \fp_eval:n {#2} ~
- \fp_eval:n {#3} ~ \fp_eval:n {#4}
- }
- }
-\cs_new_protected:Npn \driver_color_gray:n #1
- { \@@_color_select:x { gray~ \fp_eval:n {#1} } }
-\cs_new_protected:Npn \driver_color_rgb:nnn #1#2#3
- {
- \@@_color_select:x
- { rgb~ \fp_eval:n {#1} ~ \fp_eval:n {#2} ~ \fp_eval:n {#3} }
- }
-\cs_new_protected:Npn \driver_color_spot:nn #1#2
- { \@@_color_select:n { #1 } }
-\cs_new_protected:Npn \@@_color_select:n #1
- {
- \@@_literal:n { color~push~ #1 }
-%<*dvips>
- \@@_literal_postscript:n { /l3fc~{ }~def }
-%</dvips>
- \group_insert_after:N \@@_color_reset:
- }
-\cs_generate_variant:Nn \@@_color_select:n { x }
-\cs_new_protected:Npn \@@_color_reset:
- { \@@_literal:n { color~pop } }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macrocode}
-%</dvisvgm|dvipdfmx|dvips|xdvipdfmx>
-% \end{macrocode}
-%
-% \subsubsection{\texttt{pdfmode}}
-%
-% \begin{macrocode}
-%<*pdfmode>
-% \end{macrocode}
-%
-% \begin{macro}{\driver_color_pickup:N}
-% \begin{macro}{\@@_color_pickup:w}
-% The current color in driver-dependent format: pick up the package-mode
-% data if available. We end up converting back and forward in this route as
-% we store our color data in \texttt{dvips} format.
-% The \tn{current@color} needs to be \texttt{x}-expanded before
-% \cs{@@_color_pickup:w} breaks it apart, because for instance
-% \pkg{xcolor} sets it to be instructions to generate a colour
-% \begin{macrocode}
-%<*package>
-\cs_new_protected:Npn \driver_color_pickup:N #1 { }
-\AtBeginDocument
- {
- \@ifpackageloaded { color }
- {
- \cs_set_protected:Npn \driver_color_pickup:N #1
- {
- \exp_last_unbraced:Nx \@@_color_pickup:w
- { \current@color } ~ 0 ~ 0 ~ 0 \q_stop #1
- }
- \cs_new_protected:Npn \@@_color_pickup:w
- #1 ~ #2 ~ #3 ~ #4 ~ #5 ~ #6 \q_stop #7
- {
- \str_if_eq:nnTF {#2} { g }
- { \tl_set:Nn #7 { gray ~ #1 } }
- {
- \str_if_eq:nnTF {#4} { rg }
- { \tl_set:Nn #7 { rgb ~ #1 ~ #2 ~ #3 } }
- {
- \str_if_eq:nnTF {#5} { k }
- { \tl_set:Nn #7 { cmyk ~ #1 ~ #2 ~ #3 ~ #4 } }
- {
- \str_if_eq:nnTF {#2} { cs }
- {
- \tl_set:Nx #7 { spot ~ \use_none:n #1 ~ #5 }
- }
- {
- \tl_set:Nn #7 { gray ~ 0 }
- }
- }
- }
- }
- }
- }
- { }
- }
-%</package>
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{variable}{\l_@@_color_stack_int}
-% \pdfTeX{} and \LuaTeX{} have multiple stacks available, and to track
-% which one is in use a variable is required.
-% \begin{macrocode}
-\int_new:N \l_@@_color_stack_int
-% \end{macrocode}
-% \end{variable}
-%
-% \begin{macro}{\driver_color_cmyk:nnnn, \@@_color_cmyk:nnnn}
-% \begin{macro}{\driver_color_gray:n, \@@_color_gray:n}
-% \begin{macro}{\driver_color_rgb:nnn, \@@_color_rgb:nnn}
-% \begin{macro}{\driver_color_spot:nn}
-% \begin{macro}{\@@_color_select:n, \@@_color_select:x}
-% \begin{macro}{\@@_color_reset:}
-% Simply dump the data, but allowing for \LuaTeX{}.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_color_cmyk:nnnn #1#2#3#4
- {
- \use:x
- {
- \@@_color_cmyk:nnnn
- { \fp_eval:n {#1} }
- { \fp_eval:n {#2} }
- { \fp_eval:n {#3} }
- { \fp_eval:n {#4} }
- }
- }
-\cs_new_protected:Npn \@@_color_cmyk:nnnn #1#2#3#4
- {
- \@@_color_select:n
- { #1 ~ #2 ~ #3 ~ #4 ~ k ~ #1 ~ #2 ~ #3 ~ #4 ~ K }
- }
-\cs_new_protected:Npn \driver_color_gray:n #1
- { \exp_args:Nx \@@_color_gray:n { \fp_eval:n {#1} } }
-\cs_new_protected:Npn \@@_color_gray:n #1
- { \@@_color_select:n { #1 ~ g ~ #1 ~ G } }
-\cs_new_protected:Npn \driver_color_rgb:nnn #1#2#3
- {
- \use:x
- {
- \@@_color_rgb:nnn
- { \fp_eval:n {#1} }
- { \fp_eval:n {#2} }
- { \fp_eval:n {#3} }
- }
- }
-\cs_new_protected:Npn \@@_color_rgb:nnn #1#2#3
- { \@@_color_select:n { #1 ~ #2 ~ #3 ~ rg ~ #1 ~ #2 ~ #3 ~ RG } }
-\cs_new_protected:Npn \driver_color_spot:nn #1#2
- { \@@_color_select:n { /#1 ~ cs ~ /#1 ~ CS ~ #2 ~ sc ~ #2 ~ SC } }
-\cs_new_protected:Npx \@@_color_select:n #1
- {
- \cs_if_exist:NTF \tex_pdfextension:D
- { \tex_pdfextension:D colorstack }
- { \tex_pdfcolorstack:D }
- \exp_not:N \l_@@_color_stack_int push {#1}
- \group_insert_after:N \exp_not:N \@@_color_reset:
- }
-\cs_generate_variant:Nn \@@_color_select:n { x }
-\cs_new_protected:Npx \@@_color_reset:
- {
- \cs_if_exist:NTF \tex_pdfextension:D
- { \tex_pdfextension:D colorstack }
- { \tex_pdfcolorstack:D }
- \exp_not:N \l_@@_color_stack_int pop \scan_stop:
- }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macrocode}
-%</pdfmode>
-% \end{macrocode}
-%
-% \subsection{\texttt{dvips} driver}
-%
-% \begin{macrocode}
-%<*dvips>
-% \end{macrocode}
-%
-% \subsubsection{Basics}
-%
-% \begin{macro}{\@@_literal_postscript:n, \@@_literal_postscript:x}
-% Literal PostScript can be included using a few low-level formats. Here,
-% we use the form with no positioning: this is overall more convenient as
-% a wrapper. Note that this does require that where position is important,
-% an appropriate wrapper is included.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_literal_postscript:n #1
- { \@@_literal:n { ps:: #1 } }
-\cs_generate_variant:Nn \@@_literal_postscript:n { x }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@@_align_currentpoint_begin:, \@@_align_currentpoint_end:}
-% In \texttt{dvips} there is no build-in saving of the current
-% position, and so some additional PostScript is required to set up the
-% transformation matrix and also to restore it afterwards. Notice the use
-% of the stack to save the current position \enquote{up front} and to
-% move back to it at the end of the process. Notice that the |[begin]|/^^A
-% |[end]| pair here mean that we can use a run of PostScript statements
-% in separate lines: not \emph{required} but does make the code and
-% output more clear.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_align_currentpoint_begin:
- {
- \@@_literal:n { ps::[begin] }
- \@@_literal_postscript:n { currentpoint }
- \@@_literal_postscript:n { currentpoint~translate }
- }
-\cs_new_protected:Npn \@@_align_currentpoint_end:
- {
- \@@_literal_postscript:n { neg~exch~neg~exch~translate }
- \@@_literal:n { ps::[end] }
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@@_scope_begin:, \@@_scope_end:}
-% Saving/restoring scope for general operations needs to be done with
-% \texttt{dvips} positioning (try without to see this!). Thus we need the
-% |ps:| version of the special here. As only the graphics state is ever
-% altered within this pairing, we use the lower-cost |g|-versions.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_scope_begin:
- { \@@_literal:n { ps:gsave } }
-\cs_new_protected:Npn \@@_scope_end:
- { \@@_literal:n { ps:grestore } }
-% \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{Box operations}
-%
-% \begin{macro}{\driver_box_use_clip:N}
-% The \texttt{dvips} driver scales all absolute dimensions based on the
-% output resolution selected and any \TeX{} magnification. Thus for any
-% operation involving absolute lengths there is a correction to make. See
-% \texttt{normalscale} from \texttt{special.pro} for the variables, noting
-% that here everything is saved on the stack rather than as a separate
-% variable. Once all of that is done, the actual clipping is trivial.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_box_use_clip:N #1
- {
- \@@_scope_begin:
- \@@_align_currentpoint_begin:
- \@@_literal_postscript:n { matrix~currentmatrix }
- \@@_literal_postscript:n
- { Resolution~72~div~VResolution~72~div~scale }
- \@@_literal_postscript:n { DVImag~dup~scale }
- \@@_literal_postscript:x
- {
- 0 ~
- \dim_to_decimal_in_bp:n { \box_dp:N #1 } ~
- \dim_to_decimal_in_bp:n { \box_wd:N #1 } ~
- \dim_to_decimal_in_bp:n { -\box_ht:N #1 - \box_dp:N #1 } ~
- rectclip
- }
- \@@_literal_postscript:n { setmatrix }
- \@@_align_currentpoint_end:
- \hbox_overlap_right:n { \box_use:N #1 }
- \@@_scope_end:
- \skip_horizontal:n { \box_wd:N #1 }
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_box_use_rotate:Nn}
-% \begin{macro}{\@@_box_use_rotate:Nn}
-% Rotating using \texttt{dvips} does not require that the box dimensions
-% are altered and has a very convenient built-in operation. Zero rotation
-% must be written as |0| not |-0| so there is a quick test.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_box_use_rotate:Nn #1#2
- { \exp_args:NNf \@@_box_use_rotate:Nn #1 { \fp_eval:n {#2} } }
-\cs_new_protected:Npn \@@_box_use_rotate:Nn #1#2
- {
- \@@_scope_begin:
- \@@_align_currentpoint_begin:
- \@@_literal_postscript:x
- {
- \fp_compare:nNnTF {#2} = \c_zero_fp
- { 0 }
- { \fp_eval:n { round ( -(#2) , 5 ) } } ~
- rotate
- }
- \@@_align_currentpoint_end:
- \box_use:N #1
- \@@_scope_end:
- }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_box_use_scale:Nnn}
-% The \texttt{dvips} driver once again has a dedicated operation we can
-% use here.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_box_use_scale:Nnn #1#2#3
- {
- \@@_scope_begin:
- \@@_align_currentpoint_begin:
- \@@_literal_postscript:x
- {
- \fp_eval:n { round ( #2 , 5 ) } ~
- \fp_eval:n { round ( #3 , 5 ) } ~
- scale
- }
- \@@_align_currentpoint_end:
- \hbox_overlap_right:n { \box_use:N #1 }
- \@@_scope_end:
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{Images}
-%
-% \begin{macro}{\@@_image_getbb_eps:n}
-% Simply use the generic function.
-% \begin{macrocode}
-\cs_new_eq:NN \@@_image_getbb_eps:n \image_read_bb:n
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@@_image_include_eps:n}
-% The special syntax is relatively clear here: remember we need PostScript
-% sizes here.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_image_include_eps:n #1
- { \@@_literal:n { PSfile = #1 } }
-% \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{Drawing}
-%
-% \begin{macro}{\@@_draw_literal:n, \@@_draw_literal:x}
-% The same as literal PostScript: same arguments about positioning apply
-% her.
-% \begin{macrocode}
-\cs_new_eq:NN \@@_draw_literal:n \@@_literal_postscript:n
-\cs_generate_variant:Nn \@@_draw_literal:n { x }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_begin:, \driver_draw_end:}
-% The |ps::[begin]| special here deals with positioning but allows us to
-% continue on to a matching |ps::[end]|: contrast with |ps:|, which positions
-% but where we can't split material between separate calls. The
-% |@beginspecial|/|@endspecial| pair are from |special.pro| and correct the
-% scale and $y$-axis direction. The definition of |/l3fc| deals with fill
-% color in paths. In contrast to \pkg{pgf}, we don't save the current point:
-% discussion with Tom Rokici suggested a better way to handle the necessary
-% translations (see \cs{driver_draw_box_use:Nnnnn}). (Note that
-% |@beginspecial|/|@endspecial| forms a driver scope.) The |[begin]|/^^A
-% |[end]| lines are handled differently from the rest as they are
-% conceptually different: not really drawing literals but instructions to
-% \texttt{dvips} itself.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_begin:
- {
- \@@_literal:n { ps::[begin] }
- \@@_draw_literal:n { @beginspecial }
- \@@_draw_literal:n { /l3fc~{ }~def }
- }
-\cs_new_protected:Npn \driver_draw_end:
- {
- \@@_draw_literal:n { @endspecial }
- \@@_literal:n { ps::[end] }
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_scope_begin:, \driver_draw_scope_end:}
-% Scope here may need to contain saved definitions, so the entire memory
-% rather than just the graphic state has to be sent to the stack.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_scope_begin:
- { \@@_draw_literal:n { save } }
-\cs_new_protected:Npn \driver_draw_scope_end:
- { \@@_draw_literal:n { restore } }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_moveto:nn, \driver_draw_lineto:nn}
-% \begin{macro}{\driver_draw_rectangle:nnnn}
-% \begin{macro}{\driver_draw_curveto:nnnnnn}
-% Path creation operations mainly resolve directly to PostScript primitive
-% steps, with only the need to convert to \texttt{bp}. Notice that
-% \texttt{x}-type expansion is included here to ensure that any variable
-% values are forced to literals before any possible caching. There is
-% no native rectangular path command (without also clipping, filling or
-% stroking), so that task is done using a small amount of PostScript.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_moveto:nn #1#2
- {
- \@@_draw_literal:x
- {
- \dim_to_decimal_in_bp:n {#1} ~
- \dim_to_decimal_in_bp:n {#2} ~ moveto
- }
- }
-\cs_new_protected:Npn \driver_draw_lineto:nn #1#2
- {
- \@@_draw_literal:x
- {
- \dim_to_decimal_in_bp:n {#1} ~
- \dim_to_decimal_in_bp:n {#2} ~ lineto
- }
- }
-\cs_new_protected:Npn \driver_draw_rectangle:nnnn #1#2#3#4
- {
- \@@_draw_literal:x
- {
- \dim_to_decimal_in_bp:n {#4} ~ \dim_to_decimal_in_bp:n {#3} ~
- \dim_to_decimal_in_bp:n {#1} ~ \dim_to_decimal_in_bp:n {#2} ~
- moveto~dup~0~rlineto~exch~0~exch~rlineto~neg~0~rlineto~closepath
- }
- }
-\cs_new_protected:Npn \driver_draw_curveto:nnnnnn #1#2#3#4#5#6
- {
- \@@_draw_literal:x
- {
- \dim_to_decimal_in_bp:n {#1} ~ \dim_to_decimal_in_bp:n {#2} ~
- \dim_to_decimal_in_bp:n {#3} ~ \dim_to_decimal_in_bp:n {#4} ~
- \dim_to_decimal_in_bp:n {#5} ~ \dim_to_decimal_in_bp:n {#6} ~
- curveto
- }
- }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_evenodd_rule:, \driver_draw_nonzero_rule:}
-% \begin{variable}{\g_@@_draw_eor_bool}
-% The even-odd rule here can be implemented as a simply switch.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_evenodd_rule:
- { \bool_gset_true:N \g_@@_draw_eor_bool }
-\cs_new_protected:Npn \driver_draw_nonzero_rule:
- { \bool_gset_false:N \g_@@_draw_eor_bool }
-\bool_new:N \g_@@_draw_eor_bool
-% \end{macrocode}
-% \end{variable}
-% \end{macro}
-%
-% \begin{macro}
-% {
-% \driver_draw_closepath: ,
-% \driver_draw_stroke: ,
-% \driver_draw_closestroke: ,
-% \driver_draw_fill: ,
-% \driver_draw_fillstroke: ,
-% \driver_draw_clip: ,
-% \driver_draw_discardpath:
-% }
-% \begin{variable}{\g_@@_draw_clip_bool}
-% Unlike PDF, PostScript doesn't track separate colors for strokes and other
-% elements. It is also desirable to have the |clip| keyword after a stroke or
-% fill. To achieve those outcomes, there is some work to do. For color, the
-% stoke color is simple but the fill one has to be inserted by hand. For
-% clipping, the required ordering is achieved using a \TeX{} switch. All of
-% the operations end with a new path instruction as they do not terminate
-% (again in contrast to PDF).
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_closepath:
- { \@@_draw_literal:n { closepath } }
-\cs_new_protected:Npn \driver_draw_stroke:
- {
- \@@_draw_literal:n { stroke }
- \bool_if:NT \g_@@_draw_clip_bool
- {
- \@@_draw_literal:x
- {
- \bool_if:NT \g_@@_draw_eor_bool { eo }
- clip
- }
- }
- \@@_draw_literal:n { newpath }
- \bool_gset_false:N \g_@@_draw_clip_bool
- }
-\cs_new_protected:Npn \driver_draw_closestroke:
- {
- \driver_draw_closepath:
- \driver_draw_stroke:
- }
-\cs_new_protected:Npn \driver_draw_fill:
- {
- \@@_draw_literal:n { gsave }
- \@@_draw_literal:n { l3fc }
- \@@_draw_literal:x
- {
- \bool_if:NT \g_@@_draw_eor_bool { eo }
- fill
- }
- \@@_draw_literal:n { grestore }
- \bool_if:NT \g_@@_draw_clip_bool
- {
- \@@_draw_literal:x
- {
- \bool_if:NT \g_@@_draw_eor_bool { eo }
- clip
- }
- }
- \@@_draw_literal:n { newpath }
- \bool_gset_false:N \g_@@_draw_clip_bool
- }
-\cs_new_protected:Npn \driver_draw_fillstroke:
- {
- \@@_draw_literal:n { gsave }
- \@@_draw_literal:n { l3fc }
- \@@_draw_literal:x
- {
- \bool_if:NT \g_@@_draw_eor_bool { eo }
- fill
- }
- \@@_draw_literal:n { grestore }
- \@@_draw_literal:n { stroke }
- \bool_if:NT \g_@@_draw_clip_bool
- {
- \@@_draw_literal:x
- {
- \bool_if:NT \g_@@_draw_eor_bool { eo }
- clip
- }
- }
- \@@_draw_literal:n { newpath }
- \bool_gset_false:N \g_@@_draw_clip_bool
- }
-\cs_new_protected:Npn \driver_draw_clip:
- { \bool_gset_true:N \g_@@_draw_clip_bool }
-\bool_new:N \g_@@_draw_clip_bool
-\cs_new_protected:Npn \driver_draw_discardpath:
- {
- \bool_if:NT \g_@@_draw_clip_bool
- {
- \@@_draw_literal:x
- {
- \bool_if:NT \g_@@_draw_eor_bool { eo }
- clip
- }
- }
- \@@_draw_literal:n { newpath }
- \bool_gset_false:N \g_@@_draw_clip_bool
- }
-% \end{macrocode}
-% \end{variable}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_dash_pattern:nn}
-% \begin{macro}{\@@_draw_dash:n}
-% \begin{macro}{\driver_draw_linewidth:n}
-% \begin{macro}{\driver_draw_miterlimit:n}
-% \begin{macro}
-% {
-% \driver_draw_cap_butt:, \driver_draw_cap_round:, \driver_draw_cap_rectangle:,
-% \driver_draw_join_miter:, \driver_draw_join_round:, \driver_draw_join_bevel:
-% }
-% Converting paths to output is again a case of mapping directly to
-% PostScript operations.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_dash_pattern:nn #1#2
- {
- \@@_draw_literal:x
- {
- [
- \exp_args:Nf \use:n
- { \clist_map_function:nN {#1} \@@_draw_dash:n }
- ] ~
- \dim_to_decimal_in_bp:n {#2} ~ setdash
- }
- }
-\cs_new:Npn \@@_draw_dash:n #1
- { ~ \dim_to_decimal_in_bp:n {#1} }
-\cs_new_protected:Npn \driver_draw_linewidth:n #1
- {
- \@@_draw_literal:x
- { \dim_to_decimal_in_bp:n {#1} ~ setlinewidth }
- }
-\cs_new_protected:Npn \driver_draw_miterlimit:n #1
- { \@@_draw_literal:x { \fp_eval:n {#1} ~ setmiterlimit } }
-\cs_new_protected:Npn \driver_draw_cap_butt:
- { \@@_draw_literal:n { 0 ~ setlinecap } }
-\cs_new_protected:Npn \driver_draw_cap_round:
- { \@@_draw_literal:n { 1 ~ setlinecap } }
-\cs_new_protected:Npn \driver_draw_cap_rectangle:
- { \@@_draw_literal:n { 2 ~ setlinecap } }
-\cs_new_protected:Npn \driver_draw_join_miter:
- { \@@_draw_literal:n { 0 ~ setlinejoin } }
-\cs_new_protected:Npn \driver_draw_join_round:
- { \@@_draw_literal:n { 1 ~ setlinejoin } }
-\cs_new_protected:Npn \driver_draw_join_bevel:
- { \@@_draw_literal:n { 2 ~ setlinejoin } }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}
-% {
-% \driver_draw_color_fill_cmyk:nnnn ,
-% \driver_draw_color_stroke_cmyk:nnnn
-% }
-% \begin{macro}
-% {
-% \driver_draw_color_fill_gray:n ,
-% \driver_draw_color_stroke_gray:n
-% }
-% \begin{macro}
-% {
-% \driver_draw_color_fill_rgb:nnn ,
-% \driver_draw_color_stroke_rgb:nnn
-% }
-% \begin{macro}
-% {
-% \@@_draw_color_fill:n, \@@_draw_color_fill:x,
-% \@@_draw_color_stroke:n, \@@_draw_color_stroke:x
-% }
-% For \texttt{dvips}, we can use the standard color stack to deal with
-% stroke color, but for fills have to switch to raw PostScript. This is
-% thus not handled by the stack, but the context is very restricted. See
-% also how fills are implemented.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_color_fill_cmyk:nnnn #1#2#3#4
- {
- \@@_draw_color_fill:x
- {
- \fp_eval:n {#1} ~ \fp_eval:n {#2} ~
- \fp_eval:n {#3} ~ \fp_eval:n {#4} ~
- setcmykcolor
- }
- }
-\cs_new_protected:Npn \driver_draw_color_stroke_cmyk:nnnn #1#2#3#4
- {
- \@@_draw_color_stroke:x
- {
- cmyk ~
- \fp_eval:n {#1} ~ \fp_eval:n {#2} ~
- \fp_eval:n {#3} ~ \fp_eval:n {#4}
- }
- }
-\cs_new_protected:Npn \driver_draw_color_fill_gray:n #1
- { \@@_draw_color_fill:x { \fp_eval:n {#1} ~ setgray } }
-\cs_new_protected:Npn \driver_draw_color_stroke_gray:n #1
- { \@@_draw_color_stroke:x { gray ~ \fp_eval:n {#1} } }
-\cs_new_protected:Npn \driver_draw_color_fill_rgb:nnn #1#2#3
- {
- \@@_draw_color_fill:x
- { \fp_eval:n {#1} ~ \fp_eval:n {#2} ~ \fp_eval:n {#3} ~ setrgbcolor }
- }
-\cs_new_protected:Npn \driver_draw_color_stroke_rgb:nnn #1#2#3
- {
- \@@_draw_color_stroke:x
- { rgb ~ \fp_eval:n {#1} ~ \fp_eval:n {#2} ~ \fp_eval:n {#3} }
- }
-\cs_new_protected:Npn \@@_draw_color_fill:n #1
- { \@@_draw_literal:n { /l3fc ~ { #1 } ~ def } }
-\cs_generate_variant:Nn \@@_draw_color_fill:n { x }
-\cs_new_protected:Npn \@@_draw_color_stroke:n #1
- {
- \@@_literal:n { color~push~#1 }
- \group_insert_after:N \@@_color_reset:
- }
-\cs_generate_variant:Nn \@@_draw_color_stroke:n { x }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_cm:nnnn}
-% In \texttt{dvips}, keeping the transformations in line with the engine
-% is unfortunately not possible for scaling and rotations: even if we
-% decompose the matrix into those operations, there is still no driver
-% tracking (\emph{cf.}~\texttt{(x)dvipdfmx}). Thus we take the shortest
-% path available and simply dump the matrix as given.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_cm:nnnn #1#2#3#4
- {
- \@@_draw_literal:n
- {
- [
- \fp_eval:n {#1} ~ \fp_eval:n {#2} ~
- \fp_eval:n {#3} ~ \fp_eval:n {#4} ~
- 0 ~ 0
- ] ~
- concat
- }
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_box_use:Nnnnn}
-% Inside a picture |@beginspecial|/|@endspecial| are active, which is
-% normally a good thing but means that the position and scaling would be off
-% if the box was inserted directly. To deal with that, there are a number of
-% possible approaches. The implementation here was suggested by Tom Rokici
-% (author of \texttt{dvips}). We end the current special placement, then
-% set the current point with a literal |[begin]|. As for general
-% literals, we then use the stack to store the current point and move to
-% it. To insert the required transformation, we have to flip the $y$-axis,
-% once before and once after it. Then we get back to the \TeX{} reference
-% point to insert our content. The clean up has to happen in the right
-% places, hence the |[begin]|/|[end]| pair around |restore|. Finally,
-% we can return to \enquote{normal} drawing mode. Notice that the set up
-% here is very similar to that in \cs{@@_align_currentpoint_\ldots}, but
-% the ordering of saving and restoring is different (intermixed).
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_box_use:Nnnnn #1#2#3#4#5
- {
- \@@_draw_literal:n { @endspecial }
- \@@_draw_literal:n { [end] }
- \@@_draw_literal:n { [begin] }
- \@@_draw_literal:n { save }
- \@@_draw_literal:n { currentpoint }
- \@@_draw_literal:n { currentpoint~translate }
- \driver_draw_cm:nnnn { 1 } { 0 } { 0 } { -1 }
- \driver_draw_cm:nnnn {#2} {#3} {#4} {#5}
- \driver_draw_cm:nnnn { 1 } { 0 } { 0 } { -1 }
- \@@_draw_literal:n { neg~exch~neg~exch~translate }
- \@@_draw_literal:n { [end] }
- \hbox_overlap_right:n { \box_use:N #1 }
- \@@_draw_literal:n { [begin] }
- \@@_draw_literal:n { restore }
- \@@_draw_literal:n { [end] }
- \@@_draw_literal:n { [begin] }
- \@@_draw_literal:n { @beginspecial }
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{PDF Features}
-%
-% \begin{variable}{\g_@@_pdf_object_int, \g_@@_pdf_object_prop}
-% For tracking objects to allow finalisation.
-% \begin{macrocode}
-\int_new:N \g_@@_pdf_object_int
-\prop_new:N \g_@@_pdf_object_prop
-% \end{macrocode}
-% \end{variable}
-%
-% \begin{macro}{\driver_pdf_object_new:nn}
-% \begin{macro}[EXP]{\driver_pdf_object_ref:n}
-% Tracking objects is similar to \texttt{dvipdfmx}.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_pdf_object_new:nn #1#2
- {
- \int_gincr:N \g_@@_pdf_object_int
- \int_const:cn
- { g_@@_pdf_object_ \tl_to_str:n {#1} _int }
- { \g_@@_pdf_object_int }
- \prop_gput:Nnn \g_@@_pdf_object_prop {#1} {#2}
- }
-\cs_new:Npn \driver_pdf_object_ref:n #1
- { { l3obj \int_use:c { g_@@_pdf_object_ \tl_to_str:n {#1} _int } } }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_pdf_object_write:nn}
-% \begin{macro}
-% {
-% \@@_pdf_object_write_array:nn ,
-% \@@_pdf_object_write_dict:nn ,
-% \@@_pdf_object_write_stream:nn
-% }
-% \begin{macro}{\@@_pdf_object_write_stream:nnn}
-% This is where we choose the actual type: some work to get things
-% right.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_pdf_object_write:nn #1#2
- {
- \@@_literal_postscript:x
- {
- mark ~ /_objdef ~ \driver_pdf_object_ref:n {#1} ~
- /type
- \str_case_e:nn
- { \prop_item:Nn \g_@@_pdf_object_prop {#1} }
- {
- { array } { /array }
- { dict } { /dict }
- { fstream } { /stream }
- { stream } { /stream }
- }
- /OBJ ~ pdfmark
- }
- \use:c
- { @@_pdf_object_write_ \prop_item:Nn \g_@@_pdf_object_prop {#1} :nn }
- {#1} {#2}
- }
-\cs_new_protected:Npn \@@_pdf_object_write_array:nn #1#2
- {
- \@@_literal_postscript:x
- {
- mark ~ \driver_pdf_object_ref:n {#1} ~
- [ ~ \exp_not:n {#2} ~ ] ~ /PUTINTERVAL ~ pdfmark
- }
- }
-\cs_new_protected:Npn \@@_pdf_object_write_dict:nn #1#2
- {
- \@@_literal_postscript:x
- {
- mark ~ \driver_pdf_object_ref:n {#1} ~
- << ~ \exp_not:n {#2} ~ >> ~ /PUT ~ pdfmark
- }
- }
-\cs_new_protected:Npn \@@_pdf_object_write_stream:nn #1#2
- {
- \exp_args:Nx
- \@@_pdf_object_write_stream:nnn
- { \driver_pdf_object_ref:n {#1} }
- #2
- }
-\cs_new_protected:Npn \@@_pdf_object_write_stream:nnn #1#2#3
- {
- \@@_literal_postscript:n
- {
- [nobreak] ~
- mark ~ #1 ~ ( #3 ) ~ /PUT ~ pdfmark ~
- mark ~ #1 ~ << #2 >> ~ /PUT ~ pdfmark
- }
- }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_pdf_compresslevel:n}
-% \begin{macro}{\driver_pdf_objects_enable:, \driver_pdf_objects_disable:}
-% These are all no-ops.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_pdf_compresslevel:n #1 { }
-\cs_new_protected:Npn \driver_pdf_objects_enable: { }
-\cs_new_protected:Npn \driver_pdf_objects_disable: { }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macrocode}
-%</dvips>
-% \end{macrocode}
-%
-% \subsection{\texttt{pdfmode} driver}
-%
-% \begin{macrocode}
-%<*pdfmode>
-% \end{macrocode}
-%
-% The direct PDF driver covers both \pdfTeX{} and \LuaTeX{}. The latter
-% renames and restructures the driver primitives but this can be handled
-% at one level of abstraction. As such, we avoid using two separate drivers
-% for this material at the cost of some \texttt{x}-type definitions to get
-% everything expanded up-front.
-%
-% \subsubsection{Basics}
-%
-% \begin{macro}{\@@_literal_pdf:n, \@@_literal_pdf:x}
-% This is equivalent to \verb|\special{pdf:}| but the engine can
-% track it. Without the \texttt{direct} keyword everything is kept in
-% sync: the transformation matrix is set to the current point automatically.
-% Note that this is still inside the text (\texttt{BT} \dots \texttt{ET}
-% block).
-% \begin{macrocode}
-\cs_new_protected:Npx \@@_literal_pdf:n #1
- {
- \cs_if_exist:NTF \tex_pdfextension:D
- { \tex_pdfextension:D literal }
- { \tex_pdfliteral:D }
- { \exp_not:N \exp_not:n {#1} }
- }
-\cs_generate_variant:Nn \@@_literal_pdf:n { x }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@@_scope_begin:, \@@_scope_end:}
-% Higher-level interfaces for saving and restoring the graphic state.
-% \begin{macrocode}
-\cs_new_protected:Npx \@@_scope_begin:
- {
- \cs_if_exist:NTF \tex_pdfextension:D
- { \tex_pdfextension:D save \scan_stop: }
- { \tex_pdfsave:D }
- }
-\cs_new_protected:Npx \@@_scope_end:
- {
- \cs_if_exist:NTF \tex_pdfextension:D
- { \tex_pdfextension:D restore \scan_stop: }
- { \tex_pdfrestore:D }
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@@_matrix:n, \@@_matrix:x}
-% Here the appropriate function is set up to insert an affine matrix
-% into the PDF. With \pdfTeX{} and \LuaTeX{} in direct PDF output mode there
-% is a primitive for this, which only needs the rotation/scaling/skew part.
-% \begin{macrocode}
-\cs_new_protected:Npx \@@_matrix:n #1
- {
- \cs_if_exist:NTF \tex_pdfextension:D
- { \tex_pdfextension:D setmatrix }
- { \tex_pdfsetmatrix:D }
- { \exp_not:N \exp_not:n {#1} }
- }
-\cs_generate_variant:Nn \@@_matrix:n { x }
-% \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{Box operations}
-%
-% \begin{macro}{\driver_box_use_clip:N}
-% The general method is to save the current location, define a clipping path
-% equivalent to the bounding box, then insert the content at the current
-% position and in a zero width box. The \enquote{real} width is then made up
-% using a horizontal skip before tidying up. There are other approaches that
-% can be taken (for example using XForm objects), but the logic here shares
-% as much code as possible and uses the same conversions (and so same
-% rounding errors) in all cases.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_box_use_clip:N #1
- {
- \@@_scope_begin:
- \@@_literal_pdf:x
- {
- 0~
- \dim_to_decimal_in_bp:n { -\box_dp:N #1 } ~
- \dim_to_decimal_in_bp:n { \box_wd:N #1 } ~
- \dim_to_decimal_in_bp:n { \box_ht:N #1 + \box_dp:N #1 } ~
- re~W~n
- }
- \hbox_overlap_right:n { \box_use:N #1 }
- \@@_scope_end:
- \skip_horizontal:n { \box_wd:N #1 }
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_box_use_rotate:Nn}
-% \begin{macro}{\@@_box_use_rotate:Nn}
-% \begin{variable}{\l_@@_cos_fp, \l_@@_sin_fp}
-% Rotations are set using an affine transformation matrix which therefore
-% requires sine/cosine values not the angle itself. We store the rounded
-% values to avoid rounding twice. There are also a couple of comparisons to
-% ensure that |-0| is not written to the output, as this avoids any issues
-% with problematic display programs. Note that numbers are compared to~$0$
-% after rounding.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_box_use_rotate:Nn #1#2
- { \exp_args:NNf \@@_box_use_rotate:Nn #1 { \fp_eval:n {#2} } }
-\cs_new_protected:Npn \@@_box_use_rotate:Nn #1#2
- {
- \@@_scope_begin:
- \box_set_wd:Nn #1 { 0pt }
- \fp_set:Nn \l_@@_cos_fp { round ( cosd ( #2 ) , 5 ) }
- \fp_compare:nNnT \l_@@_cos_fp = \c_zero_fp
- { \fp_zero:N \l_@@_cos_fp }
- \fp_set:Nn \l_@@_sin_fp { round ( sind ( #2 ) , 5 ) }
- \@@_matrix:x
- {
- \fp_use:N \l_@@_cos_fp \c_space_tl
- \fp_compare:nNnTF \l_@@_sin_fp = \c_zero_fp
- { 0~0 }
- {
- \fp_use:N \l_@@_sin_fp
- \c_space_tl
- \fp_eval:n { -\l_@@_sin_fp }
- }
- \c_space_tl
- \fp_use:N \l_@@_cos_fp
- }
- \box_use:N #1
- \@@_scope_end:
- }
-\fp_new:N \l_@@_cos_fp
-\fp_new:N \l_@@_sin_fp
-% \end{macrocode}
-% \end{variable}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_box_use_scale:Nnn}
-% The same idea as for rotation but without the complexity of signs and
-% cosines.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_box_use_scale:Nnn #1#2#3
- {
- \@@_scope_begin:
- \@@_matrix:x
- {
- \fp_eval:n { round ( #2 , 5 ) } ~
- 0~0~
- \fp_eval:n { round ( #3 , 5 ) }
- }
- \hbox_overlap_right:n { \box_use:N #1 }
- \@@_scope_end:
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{Images}
-%
-% \begin{variable}{\l_@@_image_attr_tl}
-% In PDF mode, additional attributes of an image (such as page number) are
-% needed both to obtain the bounding box and when inserting the image: this
-% occurs as the image dictionary approach means they are read as part of
-% the bounding box operation. As such, it is easier to track additional
-% attributes using a dedicated |tl| rather than build up the same data
-% twice.
-% \begin{macrocode}
-\tl_new:N \l_@@_image_attr_tl
-% \end{macrocode}
-% \end{variable}
-%
-% \begin{macro}
-% {\@@_image_getbb_jpg:n, \@@_image_getbb_pdf:n, \@@_image_getbb_png:n}
-% \begin{macro}
-% {\@@_image_getbb_auxi:n, \@@_image_getbb_auxii:n}
-% Getting the bounding box here requires us to box up the image and
-% measure it. To deal with the difference in feature support in bitmap
-% and vector images but keeping the common parts, there is a little work
-% to do in terms of auxiliaries. The key here is to notice that we need
-% two forms of the attributes: a \enquote{short} set to allow us to
-% track for caching, and the full form to pass to the primitive.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_image_getbb_jpg:n #1
- {
- \int_zero:N \l_image_page_int
- \tl_clear:N \l_image_pagebox_tl
- \tl_set:Nx \l_@@_image_attr_tl
- {
- \tl_if_empty:NF \l_image_decode_tl
- { :D \l_image_decodearray_tl }
- \bool_if:NT \l_image_interpolate_bool
- { :I }
- }
- \tl_clear:N \l_@@_image_attr_tl
- \@@_image_getbb_auxi:n {#1}
- }
-\cs_new_eq:NN \@@_image_getbb_png:n \@@_image_getbb_jpg:n
-\cs_new_protected:Npn \@@_image_getbb_pdf:n #1
- {
- \tl_clear:N \l_image_decode_tl
- \bool_set_false:N \l_image_interpolate_bool
- \tl_set:Nx \l_@@_image_attr_tl
- {
- : \l_image_pagebox_tl
- \int_compare:nNnT \l_image_page_int > 1
- { :P \int_use:N \l_image_page_int }
- }
- \@@_image_getbb_auxi:n {#1}
- }
-\cs_new_protected:Npn \@@_image_getbb_auxi:n #1
- {
- \image_bb_restore:xF { #1 \l_@@_image_attr_tl }
- { \@@_image_getbb_auxii:n {#1} }
- }
-% \begin{macrocode}
-% Measuring the image is done by boxing up: for PDF images we could
-% use |\tex_pdfximagebbox:D|, but if doesn't work for other types.
-% As the box always starts at $(0,0)$ there is no need to worry about
-% the lower-left position.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_image_getbb_auxii:n #1
- {
- \tex_immediate:D \tex_pdfximage:D
- \bool_lazy_or:nnT
- { \l_image_interpolate_bool }
- { ! \tl_if_empty_p:N \l_image_decodearray_tl }
- {
- attr ~
- {
- \tl_if_empty:NF \l_image_decode_tl
- { /Decode~[ \l_image_decodearray_tl ] }
- \bool_if:NT \l_image_interpolate_bool
- { /Interpolate~true }
- }
- }
- \int_compare:nNnT \l_image_page_int > 0
- { page ~ \int_use:N \l_image_page_int }
- \tl_if_empty:NF \l_image_pagebox_tl
- { \l_image_pagebox_tl }
- {#1}
- \hbox_set:Nn \l_@@_tmp_box
- { \tex_pdfrefximage:D \tex_pdflastximage:D }
- \dim_set:Nn \l_image_urx_dim { \box_wd:N \l_@@_tmp_box }
- \dim_set:Nn \l_image_ury_dim { \box_ht:N \l_@@_tmp_box }
- \int_const:cn { c_@@_image_ #1 \l_@@_image_attr_tl _int }
- { \tex_the:D \tex_pdflastximage:D }
- \image_bb_save:x { #1 \l_@@_image_attr_tl }
- }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}
-% {\@@_image_include_jpg:n, \@@_image_include_pdf:n, \@@_image_include_png:n}
-% Images are already loaded for the measurement part of the code, so
-% inclusion is straight-forward, with only any attributes to worry about. The
-% latter carry through from determination of the bounding box.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_image_include_jpg:n #1
- {
- \tex_pdfrefximage:D
- \int_use:c { c_@@_image_ #1 \l_@@_image_attr_tl _int }
- }
-\cs_new_eq:NN \@@_image_include_pdf:n \@@_image_include_jpg:n
-\cs_new_eq:NN \@@_image_include_png:n \@@_image_include_jpg:n
-% \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{PDF Objects}
-%
-% \begin{variable}{\g_@@_pdf_object_prop}
-% For tracking objects to allow finalisation.
-% \begin{macrocode}
-\prop_new:N \g_@@_pdf_object_prop
-% \end{macrocode}
-% \end{variable}
-%
-% \begin{macro}{\driver_pdf_object_new:nn}
-% \begin{macro}[EXP]{\driver_pdf_object_ref:n}
-% Declaring objects means reserving at the PDF level plus starting
-% tracking.
-% \begin{macrocode}
-\group_begin:
- \cs_set_protected:Npn \@@_tmp:w #1#2
- {
- \cs_new_protected:Npx \driver_pdf_object_new:nn ##1##2
- {
- #1 reserveobjnum ~
- \int_const:cn
- { g_@@_pdf_object_ \exp_not:N \tl_to_str:n {##1} _int }
- {#2}
- \prop_gput:Nnn \exp_not:N \g_@@_pdf_object_prop {##1} {##2}
- }
- }
- \cs_if_exist:NTF \tex_pdfextension:D
- {
- \@@_tmp:w
- { \tex_pdfextension:D obj ~ }
- { \tex_pdffeedback:D lastobj \scan_stop: }
- }
- { \@@_tmp:w { \tex_pdfobj:D } { \tex_pdflastobj:D } }
-\group_end:
-\cs_new:Npn \driver_pdf_object_ref:n #1
- { \int_use:c { g_@@_pdf_object_ \tl_to_str:n {#1} _int } ~ 0 ~ R }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_pdf_object_write:nn}
-% \begin{macro}[EXP]{\@@_exp_not_i:nn, \@@_exp_not_ii:nn}
-% Writing the data needs a little information about the structure of the
-% object.
-% \begin{macrocode}
-\group_begin:
- \cs_set_protected:Npn \@@_tmp:w #1
- {
- \cs_new_protected:Npn \driver_pdf_object_write:nn ##1##2
- {
- \tex_immediate:D #1 useobjnum ~
- \int_use:c
- { g_@@_pdf_object_ \tl_to_str:n {##1} _int }
- \str_case_e:nn
- { \prop_item:Nn \g_@@_pdf_object_prop {##1} }
- {
- { array } { { [ ~ \exp_not:n {##2} ~ ] } }
- { dict } { { << ~ \exp_not:n {##2} ~ >> } }
- { fstream }
- {
- stream ~ attr ~ { \@@_exp_not_i:nn ##2 } ~
- file ~ { \@@_exp_not_ii:nn ##2 }
- }
- { stream }
- {
- stream ~ attr ~ { \@@_exp_not_i:nn ##2 } ~
- { \@@_exp_not_ii:nn ##2 }
- }
- }
- }
- }
- \cs_if_exist:NTF \tex_pdfextension:D
- { \@@_tmp:w { \tex_pdfextension:D obj ~ } }
- { \@@_tmp:w { \tex_pdfobj:D } }
-\group_end:
-\cs_new:Npn \@@_exp_not_i:nn #1#2 { \exp_not:n {#1} }
-\cs_new:Npn \@@_exp_not_ii:nn #1#2 { \exp_not:n {#2} }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \subsubsection{PDF Structure}
-%
-% \begin{macro}{\driver_pdf_compresslevel:n}
-% \begin{macro}{\driver_pdf_objects_enable:, \driver_pdf_objects_disable:}
-% \begin{macro}{\@@_pdf_objectlevel:n}
-% Simply pass data to the engine.
-% \begin{macrocode}
-\cs_new_protected:Npx \driver_pdf_compresslevel:n #1
- {
- \cs_if_exist:NTF \tex_pdfcompresslevel:D
- { \tex_pdfcompresslevel:D }
- { \tex_pdfvariable:D compresslevel }
- \exp_not:N \int_value:w \exp_not:N \int_eval:n {#1} \scan_stop:
- }
-\cs_new_protected:Npn \driver_pdf_objects_enable:
- { \@@_pdf_objectlevel:n { 2 } }
-\cs_new_protected:Npn \driver_pdf_objects_disable:
- { \@@_pdf_objectlevel:n { 0 } }
-\cs_new_protected:Npx \@@_pdf_objectlevel:n #1
- {
- \cs_if_exist:NTF \tex_pdfobjcompresslevel:D
- { \tex_pdfobjcompresslevel:D }
- { \tex_pdfvariable:D objcompresslevel }
- #1 \scan_stop:
- }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macrocode}
-%</pdfmode>
-% \end{macrocode}
-%
-% \subsection{\texttt{dvipdfmx} driver}
-%
-% \begin{macrocode}
-%<*dvipdfmx|xdvipdfmx>
-% \end{macrocode}
-%
-% The \texttt{dvipdfmx} shares code with the PDF mode one (using the common
-% section to this file) but also with \texttt{xdvipdfmx}. The latter is close
-% to identical to \texttt{dvipdfmx} and so all of the code here is extracted
-% for both drivers, with some \texttt{clean up} for \texttt{xdvipdfmx} as
-% required.
-%
-% \subsubsection{Basics}
-%
-% \begin{macro}{\@@_literal_pdf:n, \@@_literal_pdf:x}
-% Equivalent to \texttt{pdf:content} but favored as the link to
-% the \pdfTeX{} primitive approach is clearer.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_literal_pdf:n #1
- { \@@_literal:n { pdf:literal~ #1 } }
-\cs_generate_variant:Nn \@@_literal_pdf:n { x }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@@_scope_begin:, \@@_scope_end:}
-% Scoping is done using the driver-specific specials.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_scope_begin:
- { \@@_literal:n { x:gsave } }
-\cs_new_protected:Npn \@@_scope_end:
- { \@@_literal:n { x:grestore } }
-% \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{Box operations}
-%
-% \begin{macro}{\driver_box_use_clip:N}
-% The code here is identical to that for \texttt{pdfmode}: unlike rotation and
-% scaling, there is no higher-level support in the driver for clipping.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_box_use_clip:N #1
- {
- \@@_scope_begin:
- \@@_literal_pdf:x
- {
- 0~
- \dim_to_decimal_in_bp:n { -\box_dp:N #1 } ~
- \dim_to_decimal_in_bp:n { \box_wd:N #1 } ~
- \dim_to_decimal_in_bp:n { \box_ht:N #1 + \box_dp:N #1 } ~
- re~W~n
- }
- \hbox_overlap_right:n { \box_use:N #1 }
- \@@_scope_end:
- \skip_horizontal:n { \box_wd:N #1 }
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_box_use_rotate:Nn}
-% \begin{macro}{\@@_box_use_rotate:Nn}
-% Rotating in \texttt{(x)}dvipdmfx can be implemented using either PDF or
-% driver-specific code. The former approach however is not \enquote{aware}
-% of the content of boxes: this means that any embedded links would not be
-% adjusted by the rotation. As such, the driver-native approach is preferred:
-% the code therefore is similar (though not identical) to the \texttt{dvips}
-% version (notice the rotation angle here is positive). As for
-% \texttt{dvips}, zero rotation is written as |0| not |-0|.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_box_use_rotate:Nn #1#2
- { \exp_args:NNf \@@_box_use_rotate:Nn #1 { \fp_eval:n {#2} } }
-\cs_new_protected:Npn \@@_box_use_rotate:Nn #1#2
- {
- \@@_scope_begin:
- \@@_literal:x
- {
- x:rotate~
- \fp_compare:nNnTF {#2} = \c_zero_fp
- { 0 }
- { \fp_eval:n { round ( #2 , 5 ) } }
- }
- \box_use:N #1
- \@@_scope_end:
- }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_box_use_scale:Nnn}
-% Much the same idea for scaling: use the higher-level driver operation to allow
-% for box content.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_box_use_scale:Nnn #1#2#3
- {
- \@@_scope_begin:
- \@@_literal:x
- {
- x:scale~
- \fp_eval:n { round ( #2 , 5 ) } ~
- \fp_eval:n { round ( #3 , 5 ) }
- }
- \hbox_overlap_right:n { \box_use:N #1 }
- \@@_scope_end:
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{Images}
-%
-% \begin{macro}
-% {
-% \@@_image_getbb_eps:n, \@@_image_getbb_jpg:n,
-% \@@_image_getbb_pdf:n, \@@_image_getbb_png:n
-% }
-% Simply use the generic functions: only for \texttt{dvipdfmx} in the
-% extraction cases.
-% \begin{macrocode}
-\cs_new_eq:NN \@@_image_getbb_eps:n \image_read_bb:n
-%<*dvipdfmx>
-\cs_new_protected:Npn \@@_image_getbb_jpg:n #1
- {
- \int_zero:N \l_image_page_int
- \tl_clear:N \l_image_pagebox_tl
- \image_extract_bb:n {#1}
- }
-\cs_new_eq:NN \@@_image_getbb_png:n \@@_image_getbb_jpg:n
-\cs_new_protected:Npn \@@_image_getbb_pdf:n #1
- {
- \tl_clear:N \l_image_decode_tl
- \bool_set_false:N \l_image_interpolate_bool
- \image_extract_bb:n {#1}
- }
-%</dvipdfmx>
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{variable}{\g_@@_image_int}
-% Used to track the object number associated with each image.
-% \begin{macrocode}
-\int_new:N \g_@@_image_int
-% \end{macrocode}
-% \end{variable}
-%
-% \begin{macro}
-% {
-% \@@_image_include_eps:n, \@@_image_include_jpg:n,
-% \@@_image_include_pdf:n, \@@_image_include_png:n
-% }
-% \begin{macro}{\@@_image_include_auxi:nn}
-% \begin{macro}{\@@_image_include_auxii:nnn, \@@_image_include_auxii:xnn}
-% \begin{macro}{\@@_image_include_auxiii:nn}
-% The special syntax depends on the file type. There is a difference in
-% how PDF images are best handled between |dvipdfmx| and |xdvipdfmx|: for
-% the latter it is better to use the primitive route. The relevant code for
-% that is included later in this file.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_image_include_eps:n #1
- {
- \@@_literal:n { PSfile = #1 }
- }
-\cs_new_protected:Npn \@@_image_include_jpg:n #1
- { \@@_image_include_auxi:nn {#1} { image } }
-\cs_new_eq:NN \@@_image_include_png:n \@@_image_include_jpg:n
-%<*dvipdfmx>
-\cs_new_protected:Npn \@@_image_include_pdf:n #1
- { \@@_image_include_auxi:nn {#1} { epdf } }
-%</dvipdfmx>
-% \end{macrocode}
-% Image inclusion is set up to use the fact that each image is stored in
-% the PDF as an XObject. This means that we can include repeated images
-% only once and refer to them. To allow that, track the nature of each
-% image: much the same as for the direct PDF mode case.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_image_include_auxi:nn #1#2
- {
- \@@_image_include_auxii:xnn
- {
- \tl_if_empty:NF \l_image_pagebox_tl
- { : \l_image_pagebox_tl }
- \int_compare:nNnT \l_image_page_int > 1
- { :P \int_use:N \l_image_page_int }
- \tl_if_empty:NF \l_image_decode_tl
- { :D \l_image_decodearray_tl }
- \bool_if:NT \l_image_interpolate_bool
- { :I }
- }
- {#1} {#2}
- }
-\cs_new_protected:Npn \@@_image_include_auxii:nnn #1#2#3
- {
- \int_if_exist:cTF { c_@@_image_ #2#1 _int }
- {
- \@@_literal:x
- { pdf:usexobj~@image \int_use:c { c_@@_image_ #2#1 _int } }
- }
- { \@@_image_include_auxiii:nn {#2} {#1} {#3} }
- }
-\cs_generate_variant:Nn \@@_image_include_auxii:nnn { x }
-% \end{macrocode}
-% Inclusion using the specials is relatively straight-forward, but there
-% is one wrinkle. To get the |pagebox| correct for PDF images in all cases,
-% it is necessary to provide both that information and the |bbox| argument:
-% odd things happen otherwise!
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_image_include_auxiii:nnn #1#2#3
- {
- \int_gincr:N \g_@@_image_int
- \int_const:cn { c_@@_image_ #1#2 _int } { \g_@@_image_int }
- \@@_literal:x
- {
- pdf:#3~
- @image \int_use:c { c_@@_image_ #1#2 _int }
- \int_compare:nNnT \l_image_page_int > 1
- { page ~ \int_use:N \l_image_page_int \c_space_tl }
- \tl_if_empty:NF \l_image_pagebox_tl
- {
- pagebox ~ \l_image_pagebox_tl \c_space_tl
- bbox ~
- \dim_to_decimal_in_bp:n \l_image_llx_dim \c_space_tl
- \dim_to_decimal_in_bp:n \l_image_lly_dim \c_space_tl
- \dim_to_decimal_in_bp:n \l_image_urx_dim \c_space_tl
- \dim_to_decimal_in_bp:n \l_image_ury_dim \c_space_tl
- }
- (#1)
- \bool_lazy_or:nnT
- { \l_image_interpolate_bool }
- { ! \tl_if_empty_p:N \l_image_decodearray_tl }
- {
- <<
- \tl_if_empty:NF \l_image_decode_tl
- { /Decode~[ \l_image_decodearray_tl ] }
- \bool_if:NT \l_image_interpolate_bool
- { /Interpolate~true> }
- >>
- }
- }
- }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \subsubsection{PDF Objects}
-%
-% \begin{variable}{\g_@@_pdf_object_int, \g_@@_pdf_object_prop}
-% For tracking objects to allow finalisation.
-% \begin{macrocode}
-\int_new:N \g_@@_pdf_object_int
-\prop_new:N \g_@@_pdf_object_prop
-% \end{macrocode}
-% \end{variable}
-%
-% \begin{macro}{\driver_pdf_object_new:nn}
-% \begin{macro}[EXP]{\driver_pdf_object_ref:n}
-% Objects are tracked at the macro level, but we don't have to do anything
-% at this stage.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_pdf_object_new:nn #1#2
- {
- \int_gincr:N \g_@@_pdf_object_int
- \int_const:cn
- { g_@@_pdf_object_ \tl_to_str:n {#1} _int }
- { \g_@@_pdf_object_int }
- \prop_gput:Nnn \g_@@_pdf_object_prop {#1} {#2}
- }
-\cs_new:Npn \driver_pdf_object_ref:n #1
- { @l3obj \int_use:c { g_@@_pdf_object_ \tl_to_str:n {#1} _int } }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_pdf_object_write:nn}
-% \begin{macro}{\@@_pdf_object_write:nnn}
-% \begin{macro}
-% {
-% \@@_pdf_object_write_array:nn ,
-% \@@_pdf_object_write_dict:nn ,
-% \@@_pdf_object_write_fstream:nn ,
-% \@@_pdf_object_write_stream:nn
-% }
-% \begin{macro}{\@@_pdf_object_write_stream:nnnn}
-% This is where we choose the actual type.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_pdf_object_write:nn #1#2
- {
- \exp_args:Nx \@@_pdf_object_write:nnn
- { \prop_item:Nn \g_@@_pdf_object_prop {#1} } {#1} {#2}
- }
-\cs_new_protected:Npn \@@_pdf_object_write:nnn #1#2#3
- { \use:c { @@_pdf_object_write_ #1 :nn } {#2} {#3} }
-\cs_new_protected:Npn \@@_pdf_object_write_array:nn #1#2
- {
- \@@_literal:x
- {
- pdf:obj ~ \driver_pdf_object_ref:n {#1} ~
- [ ~ \exp_not:n {#2} ~ ]
- }
- }
-\cs_new_protected:Npn \@@_pdf_object_write_dict:nn #1#2
- {
- \@@_literal:x
- {
- pdf:obj ~ \driver_pdf_object_ref:n {#1} ~
- << ~ \exp_not:n {#2} ~ >>
- }
- }
-\cs_new_protected:Npn \@@_pdf_object_write_fstream:nn #1#2
- { \@@_pdf_object_write_stream:nnnn { f } {#1} #2 }
-\cs_new_protected:Npn \@@_pdf_object_write_stream:nn #1#2
- { \@@_pdf_object_write_stream:nnnn { } {#1} #2 }
-\cs_new_protected:Npn \@@_pdf_object_write_stream:nnnn #1#2#3#4
- {
- \@@_literal:x
- {
- pdf: #1 stream ~ \driver_pdf_object_ref:n {#2} ~
- ( \exp_not:n {#4} ) ~ << \exp_not:n {#3} >>
-
- }
- }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \subsubsection{PDF Structure}
-%
-% \begin{macro}{\driver_pdf_compresslevel:n}
-% \begin{macro}{\driver_pdf_objects_enable:, \driver_pdf_objects_disable:}
-% Pass data to the driver: these are a one-shot.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_pdf_compresslevel:n #1
- { \@@_literal:x { dvipdfmx:config~z~ \int_eval:n {#1} } }
-\cs_new_protected:Npn \driver_pdf_objects_enable: { }
-\cs_new_protected:Npn \driver_pdf_objects_disable:
- { \@@_literal:n { dvipdfmx:config~C~0x40 } }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macrocode}
-%</dvipdfmx|xdvipdfmx>
-% \end{macrocode}
-%
-% \subsection{\texttt{xdvipdfmx} driver}
-%
-% \begin{macrocode}
-%<*xdvipdfmx>
-% \end{macrocode}
-%
-% \subsubsection{Images}
-%
-% \begin{macro}
-% {\@@_image_getbb_jpg:n, \@@_image_getbb_pdf:n, \@@_image_getbb_png:n}
-% \begin{macro}{\@@_image_getbb_auxi:nN}
-% \begin{macro}{\@@_image_getbb_auxii:nnN, \@@_image_getbb_auxii:VnN}
-% \begin{macro}{\@@_image_getbb_auxiii:nNnn}
-% \begin{macro}{\@@_image_getbb_auxiv:nnNnn, \@@_image_getbb_auxiv:VnNnn}
-% \begin{macro}{\@@_image_getbb_auxv:nNnn, \@@_image_getbb_auxv:nNnn}
-% \begin{macro}[EXP]{\@@_image_getbb_pagebox:w}
-% For \texttt{xdvipdfmx}, there are two primitives that allow us to obtain
-% the bounding box without needing \texttt{extractbb}. The only complexity
-% is passing the various minor variations to a common core process. The
-% \XeTeX{} primitive omits the text |box| from the page box specification,
-% so there is also some \enquote{trimming} to do here.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_image_getbb_jpg:n #1
- {
- \int_zero:N \l_image_page_int
- \tl_clear:N \l_image_pagebox_tl
- \@@_image_getbb_auxi:nN {#1} \tex_XeTeXpicfile:D
- }
-\cs_new_eq:NN \@@_image_getbb_png:n \@@_image_getbb_jpg:n
-\cs_new_protected:Npn \@@_image_getbb_pdf:n #1
- {
- \tl_clear:N \l_image_decode_tl
- \bool_set_false:N \l_image_interpolate_bool
- \@@_image_getbb_auxi:nN {#1} \tex_XeTeXpdffile:D
- }
-\cs_new_protected:Npn \@@_image_getbb_auxi:nN #1#2
- {
- \int_compare:nNnTF \l_image_page_int > 1
- { \@@_image_getbb_auxii:VnN \l_image_page_int {#1} #2 }
- { \@@_image_getbb_auxiii:nNnn {#1} #2 }
- }
-\cs_new_protected:Npn \@@_image_getbb_auxii:nnN #1#2#3
- { \@@_image_getbb_aux:nNnn {#2} #3 { :P #1 } { page #1 } }
-\cs_generate_variant:Nn \@@_image_getbb_auxii:nnN { V }
-\cs_new_protected:Npn \@@_image_getbb_auxiii:nNnn #1#2#3#4
- {
- \tl_if_empty:NTF \l_image_pagebox_tl
- { \@@_image_getbb_auxiv:VnNnn \l_image_pagebox_tl }
- { \@@_image_getbb_auxv:nNnn }
- {#1} #2 {#3} {#4}
- }
-\cs_new_protected:Npn \@@_image_getbb_auxiv:nnNnn #1#2#3#4#5
- {
- \use:x
- {
- \@@_image_getbb_auxv:nNnn {#2} #3 { : #1 #4 }
- { #5 ~ \@@_image_getbb_pagebox:w #1 }
- }
- }
-\cs_generate_variant:Nn \@@_image_getbb_auxiv:nnNnn { V }
-\cs_new_protected:Npn \@@_image_getbb_auxv:nNnn #1#2#3#4
- {
- \image_bb_restore:nF {#1#3}
- { \@@_image_getbb_auxvi:nNnn {#1} #2 {#3} {#4} }
- }
-\cs_new_protected:Npn \@@_image_getbb_auxvi:nNnn #1#2#3#4
- {
- \hbox_set:Nn \l_@@_tmp_box { #2 #1 ~ #4 }
- \dim_set:Nn \l_image_utx_dim { \box_wd:N \l_@@_tmp_box }
- \dim_set:Nn \l_image_ury_dim { \box_ht:N \l_@@_tmp_box }
- \image_bb_save:n {#1#3}
- }
-\cs_new:Npn \@@_image_getbb_pagebox:w #1 box {#1}
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\@@_image_include_pdf:n}
-% For PDF images, properly supporting the |pagebox| concept in \XeTeX{}
-% is best done using the |\tex_XeTeXpdffile:D| primitive. The syntax here
-% is the same as for the image measurement part, although we know at this
-% stage that there must be some valid setting for \cs{l_image_pagebox_tl}.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_image_include_pdf:n #1
- {
- \tex_XeTeXpdffile:D "#1" ~
- \int_compare:nNnT \l_image_page_int > 0
- { page~ \int_use:N \l_image_page_int }
- \@@_image_getbb_auxiv:VnNnn \l_image_pagebox_tl
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macrocode}
-%</xdvipdfmx>
-% \end{macrocode}
-%
-% \subsection{Drawing commands: \texttt{pdfmode} and \texttt{(x)dvipdfmx}}
-%
-% Both \texttt{pdfmode} and \texttt{(x)dvipdfmx} directly produce PDF output
-% and understand a shared set of specials for drawing commands.
-%
-% \begin{macrocode}
-%<*dvipdfmx|pdfmode|xdvipdfmx>
-% \end{macrocode}
-%
-% \subsubsection{Drawing}
-%
-% \begin{macro}{\@@_draw_literal:n, \@@_draw_literal:x}
-% Pass data through using a dedicated interface.
-% \begin{macrocode}
-\cs_new_eq:NN \@@_draw_literal:n \@@_literal_pdf:n
-\cs_generate_variant:Nn \@@_draw_literal:n { x }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_begin:, \driver_draw_end:}
-% No special requirements here, so simply set up a drawing scope.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_begin:
- { \driver_draw_scope_begin: }
-\cs_new_protected:Npn \driver_draw_end:
- { \driver_draw_scope_end: }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_scope_begin:, \driver_draw_scope_end:}
-% Use the driver-level scope mechanisms.
-% \begin{macrocode}
-\cs_new_eq:NN \driver_draw_scope_begin: \@@_scope_begin:
-\cs_new_eq:NN \driver_draw_scope_end: \@@_scope_end:
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_moveto:nn, \driver_draw_lineto:nn}
-% \begin{macro}{\driver_draw_curveto:nnnnnn}
-% \begin{macro}{\driver_draw_rectangle:nnnn}
-% Path creation operations all resolve directly to PDF primitive steps, with
-% only the need to convert to \texttt{bp}.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_moveto:nn #1#2
- {
- \@@_draw_literal:x
- { \dim_to_decimal_in_bp:n {#1} ~ \dim_to_decimal_in_bp:n {#2} ~ m }
- }
-\cs_new_protected:Npn \driver_draw_lineto:nn #1#2
- {
- \@@_draw_literal:x
- { \dim_to_decimal_in_bp:n {#1} ~ \dim_to_decimal_in_bp:n {#2} ~ l }
- }
-\cs_new_protected:Npn \driver_draw_curveto:nnnnnn #1#2#3#4#5#6
- {
- \@@_draw_literal:x
- {
- \dim_to_decimal_in_bp:n {#1} ~ \dim_to_decimal_in_bp:n {#2} ~
- \dim_to_decimal_in_bp:n {#3} ~ \dim_to_decimal_in_bp:n {#4} ~
- \dim_to_decimal_in_bp:n {#5} ~ \dim_to_decimal_in_bp:n {#6} ~
- c
- }
- }
-\cs_new_protected:Npn \driver_draw_rectangle:nnnn #1#2#3#4
- {
- \@@_draw_literal:x
- {
- \dim_to_decimal_in_bp:n {#1} ~ \dim_to_decimal_in_bp:n {#2} ~
- \dim_to_decimal_in_bp:n {#3} ~ \dim_to_decimal_in_bp:n {#4} ~
- re
- }
- }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_evenodd_rule:, \driver_draw_nonzero_rule:}
-% \begin{variable}{\g_@@_draw_eor_bool}
-% The even-odd rule here can be implemented as a simply switch.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_evenodd_rule:
- { \bool_gset_true:N \g_@@_draw_eor_bool }
-\cs_new_protected:Npn \driver_draw_nonzero_rule:
- { \bool_gset_false:N \g_@@_draw_eor_bool }
-\bool_new:N \g_@@_draw_eor_bool
-% \end{macrocode}
-% \end{variable}
-% \end{macro}
-%
-% \begin{macro}
-% {
-% \driver_draw_closepath: ,
-% \driver_draw_stroke: ,
-% \driver_draw_closestroke: ,
-% \driver_draw_fill: ,
-% \driver_draw_fillstroke: ,
-% \driver_draw_clip: ,
-% \driver_draw_discardpath:
-% }
-% Converting paths to output is again a case of mapping directly to
-% PDF operations.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_closepath:
- { \@@_draw_literal:n { h } }
-\cs_new_protected:Npn \driver_draw_stroke:
- { \@@_draw_literal:n { S } }
-\cs_new_protected:Npn \driver_draw_closestroke:
- { \@@_draw_literal:n { s } }
-\cs_new_protected:Npn \driver_draw_fill:
- {
- \@@_draw_literal:x
- { f \bool_if:NT \g_@@_draw_eor_bool * }
- }
-\cs_new_protected:Npn \driver_draw_fillstroke:
- {
- \@@_draw_literal:x
- { B \bool_if:NT \g_@@_draw_eor_bool * }
- }
-\cs_new_protected:Npn \driver_draw_clip:
- {
- \@@_draw_literal:x
- { W \bool_if:NT \g_@@_draw_eor_bool * }
- }
-\cs_new_protected:Npn \driver_draw_discardpath:
- { \@@_draw_literal:n { n } }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_dash_pattern:nn}
-% \begin{macro}{\@@_draw_dash:n}
-% \begin{macro}{\driver_draw_linewidth:n}
-% \begin{macro}{\driver_draw_miterlimit:n}
-% \begin{macro}
-% {
-% \driver_draw_cap_butt:, \driver_draw_cap_round:, \driver_draw_cap_rectangle:,
-% \driver_draw_join_miter:, \driver_draw_join_round:, \driver_draw_join_bevel:
-% }
-% Converting paths to output is again a case of mapping directly to
-% PDF operations.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_dash_pattern:nn #1#2
- {
- \@@_draw_literal:x
- {
- [
- \exp_args:Nf \use:n
- { \clist_map_function:nN {#1} \@@_draw_dash:n }
- ] ~
- \dim_to_decimal_in_bp:n {#2} ~ d
- }
- }
-\cs_new:Npn \@@_draw_dash:n #1
- { ~ \dim_to_decimal_in_bp:n {#1} }
-\cs_new_protected:Npn \driver_draw_linewidth:n #1
- {
- \@@_draw_literal:x
- { \dim_to_decimal_in_bp:n {#1} ~ w }
- }
-\cs_new_protected:Npn \driver_draw_miterlimit:n #1
- { \@@_draw_literal:x { \fp_eval:n {#1} ~ M } }
-\cs_new_protected:Npn \driver_draw_cap_butt:
- { \@@_draw_literal:n { 0 ~ J } }
-\cs_new_protected:Npn \driver_draw_cap_round:
- { \@@_draw_literal:n { 1 ~ J } }
-\cs_new_protected:Npn \driver_draw_cap_rectangle:
- { \@@_draw_literal:n { 2 ~ J } }
-\cs_new_protected:Npn \driver_draw_join_miter:
- { \@@_draw_literal:n { 0 ~ j } }
-\cs_new_protected:Npn \driver_draw_join_round:
- { \@@_draw_literal:n { 1 ~ j } }
-\cs_new_protected:Npn \driver_draw_join_bevel:
- { \@@_draw_literal:n { 2 ~ j } }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}
-% {
-% \driver_draw_color_fill_cmyk:nnnn ,
-% \driver_draw_color_stroke_cmyk:nnnn
-% }
-% \begin{macro}
-% {
-% \driver_draw_color_fill_gray:n ,
-% \driver_draw_color_stroke_gray:n
-% }
-% \begin{macro}
-% {
-% \driver_draw_color_fill_rgb:nnn ,
-% \driver_draw_color_stroke_rgb:nnn
-% }
-% \begin{macro}{\@@_color_fill_select:n, \@@_color_fill_select:x}
-% For the stroke color, all engines here can use the color stack to handle
-% the setting. However, that is not the case for fill color: the stack in
-% \texttt{(x)dvipdfmx} only covers one type of color. So we have to use
-% different approaches for the two sets of engines.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_color_fill_cmyk:nnnn #1#2#3#4
- {
- \@@_color_fill_select:x
- {
- \fp_eval:n {#1} ~ \fp_eval:n {#2} ~
- \fp_eval:n {#3} ~ \fp_eval:n {#4} ~
- k
- }
- }
-\cs_new_protected:Npn \driver_draw_color_stroke_cmyk:nnnn #1#2#3#4
- {
- \@@_color_select:x
- {
- \fp_eval:n {#1} ~ \fp_eval:n {#2} ~
- \fp_eval:n {#3} ~ \fp_eval:n {#4} ~
- k
- }
- }
-\cs_new_protected:Npn \driver_draw_color_fill_gray:n #1
- { \@@_color_fill_select:x { \fp_eval:n {#1} ~ g } }
-\cs_new_protected:Npn \driver_draw_color_stroke_gray:n #1
- { \@@_color_select:x { \fp_eval:n {#1} ~ G } }
-\cs_new_protected:Npn \driver_draw_color_fill_rgb:nnn #1#2#3
- {
- \@@_color_fill_select:x
- { \fp_eval:n {#1} ~ \fp_eval:n {#2} ~ \fp_eval:n {#3} ~ rg }
- }
-\cs_new_protected:Npn \driver_draw_color_stroke_rgb:nnn #1#2#3
- {
- \@@_color_select:x
- { \fp_eval:n {#1} ~ \fp_eval:n {#2} ~ \fp_eval:n {#3} ~ RG }
- }
-%<*pdfmode>
-\cs_new_eq:NN \@@_color_fill_select:n \@@_color_select:n
-%</pdfmode>
-%<*dvipdfmx|xdvipdfmx>
-\cs_new_eq:NN \@@_color_fill_select:n \@@_draw_literal:n
-%</dvipdfmx|xdvipdfmx>
-\cs_generate_variant:Nn \@@_color_fill_select:n { x }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_cm:nnnn}
-% \begin{macro}{\@@_draw_cm:nnnn}
-% Another split here between \texttt{pdfmode} and \texttt{(x)dvipdfmx}.
-% In the former, we have a direct method to maintain alignment: the driver
-% can use a matrix itself. For \texttt{(x)dvipdfmx}, we can to decompose the
-% matrix into rotations and a scaling, then use those operations as they
-% are handled by the driver. (There is driver support for matrix operations in
-% \texttt{(x)dvipdfmx}, but as a matched pair so not suitable for the
-% \enquote{stand alone} transformation set up here.)
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_cm:nnnn #1#2#3#4
- {
-%<*pdfmode>
- \@@_matrix:x
- {
- \fp_eval:n {#1} ~ \fp_eval:n {#2} ~
- \fp_eval:n {#3} ~ \fp_eval:n {#4}
- }
-%</pdfmode>
-%<*dvipdfmx|xdvipdfmx>
- \@@_draw_cm_decompose:nnnnN {#1} {#2} {#3} {#4}
- \@@_draw_cm:nnnn
-%</dvipdfmx|xdvipdfmx>
- }
-%<*dvipdfmx|xdvipdfmx>
-\cs_new_protected:Npn \@@_draw_cm:nnnn #1#2#3#4
- {
- \@@_literal:x
- {
- x:rotate~
- \fp_compare:nNnTF {#1} = \c_zero_fp
- { 0 }
- { \fp_eval:n { round ( -#1 , 5 ) } }
- }
- \@@_literal:x
- {
- x:scale~
- \fp_eval:n { round ( #2 , 5 ) } ~
- \fp_eval:n { round ( #3 , 5 ) }
- }
- \@@_literal:x
- {
- x:rotate~
- \fp_compare:nNnTF {#4} = \c_zero_fp
- { 0 }
- { \fp_eval:n { round ( -#4 , 5 ) } }
- }
- }
-%</dvipdfmx|xdvipdfmx>
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\@@_draw_cm_decompose:nnnnN}
-% \begin{macro}
-% {
-% \@@_draw_cm_decompose_auxi:nnnnN,
-% \@@_draw_cm_decompose_auxii:nnnnN,
-% \@@_draw_cm_decompose_auxiii:nnnnN,
-% }
-% Internally, transformations for drawing are tracked as a matrix. Not all
-% engines provide a way of dealing with this: if we use a raw matrix, the
-% engine looses track of positions (for example for hyperlinks), and this is
-% not desirable. They do, however, allow us to track rotations and scalings.
-% Luckily, we can decompose any (two-dimensional) matrix into two rotations
-% and a single scaling:
-% \[
-% \begin{bmatrix}
-% A & B \\ C & D
-% \end{bmatrix}
-% =
-% \begin{bmatrix}
-% \cos\beta & \sin\beta \\ -\sin\beta & \cos\beta
-% \end{bmatrix}
-% \begin{bmatrix}
-% w_{1} & 0 \\ 0 & w_{2}
-% \end{bmatrix}
-% \begin{bmatrix}
-% \cos\gamma & \sin\gamma \\ -\sin\gamma & \cos\gamma
-% \end{bmatrix}
-% \]
-% The parent matrix can be converted to
-% \[
-% \begin{bmatrix}
-% A & B \\ C & D
-% \end{bmatrix}
-% =
-% \begin{bmatrix}
-% E & H \\-H & E
-% \end{bmatrix}
-% +
-% \begin{bmatrix}
-% F & G \\ G & -F
-% \end{bmatrix}
-% \]
-% From these, we can find that
-% \begin{align*}
-% \frac{w_{1} + w_{2}}{2} &= \sqrt{E^{2} + H^{2}} \\
-% \frac{w_{1} - w_{2}}{2} &= \sqrt{F^{2} + G^{2}} \\
-% \gamma - \beta &= \tan^{-1}(G/F) \\
-% \gamma + \beta &= \tan^{-1}(H/E)
-% \end{align*}
-% at which point we just have to do various pieces of re-arrangement to
-% get all of the values. (See J.~Blinn, \emph{IEEE Comput.\ Graph.\ Appl.},
-% 1996, \textbf{16}, 82--88.) There is one wrinkle: the PostScript (and PDF)
-% way of specifying a transformation matrix exchanges where one would
-% normally expect $B$ and $C$ to be.
-% \begin{macrocode}
-%<*dvipdfmx|xdvipdfmx>
-\cs_new_protected:Npn \@@_draw_cm_decompose:nnnnN #1#2#3#4#5
- {
- \use:x
- {
- \@@_draw_cm_decompose_auxi:nnnnN
- { \fp_eval:n { (#1 + #4) / 2 } }
- { \fp_eval:n { (#1 - #4) / 2 } }
- { \fp_eval:n { (#3 + #2) / 2 } }
- { \fp_eval:n { (#3 - #2) / 2 } }
- }
- #5
- }
-\cs_new_protected:Npn \@@_draw_cm_decompose_auxi:nnnnN #1#2#3#4#5
- {
- \use:x
- {
- \@@_draw_cm_decompose_auxii:nnnnN
- { \fp_eval:n { 2 * sqrt ( #1 * #1 + #4 * #4 ) } }
- { \fp_eval:n { 2 * sqrt ( #2 * #2 + #3 * #3 ) } }
- { \fp_eval:n { atand ( #3 , #2 ) } }
- { \fp_eval:n { atand ( #4 , #1 ) } }
- }
- #5
- }
-\cs_new_protected:Npn \@@_draw_cm_decompose_auxii:nnnnN #1#2#3#4#5
- {
- \use:x
- {
- \@@_draw_cm_decompose_auxiii:nnnnN
- { \fp_eval:n { ( #4 - #3 ) / 2 } }
- { \fp_eval:n { ( #1 + #2 ) / 2 } }
- { \fp_eval:n { ( #1 - #2 ) / 2 } }
- { \fp_eval:n { ( #4 + #3 ) / 2 } }
- }
- #5
- }
-\cs_new_protected:Npn \@@_draw_cm_decompose_auxiii:nnnnN #1#2#3#4#5
- {
- \fp_compare:nNnTF { abs( #2 ) } > { abs ( #3 ) }
- { #5 {#1} {#2} {#3} {#4} }
- { #5 {#1} {#3} {#2} {#4} }
- }
-%</dvipdfmx|xdvipdfmx>
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_box_use:Nnnnn}
-% Inserting a \TeX{} box transformed to the requested position and using
-% the current matrix is done using a mixture of \TeX{} and low-level
-% manipulation. The offset can be handled by \TeX{}, so only any rotation/^^A
-% skew/scaling component needs to be done using the matrix operation. As this
-% operation can never be cached, the scope is set directly not using the
-% \texttt{draw} version.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_box_use:Nnnnn #1#2#3#4#5
- {
- \@@_scope_begin:
-%<*pdfmode>
- \driver_draw_cm:nnnn {#2} {#3} {#4} {#5}
-%</pdfmode>
-%<*dvipdfmx|xdvipdfmx>
- \@@_literal:x
- {
- pdf:btrans~matrix~
- \fp_eval:n {#2} ~ \fp_eval:n {#3} ~
- \fp_eval:n {#4} ~ \fp_eval:n {#5} ~
- 0 ~ 0
- }
-%</dvipdfmx|xdvipdfmx>
- \hbox_overlap_right:n { \box_use:N #1 }
-%<*dvipdfmx|xdvipdfmx>
- \@@_literal:n { pdf:etrans }
-%</dvipdfmx|xdvipdfmx>
- \@@_scope_end:
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macrocode}
-%</dvipdfmx|pdfmode|xdvipdfmx>
-% \end{macrocode}
-%
-% \subsection{\texttt{dvisvgm} driver}
-%
-% \begin{macrocode}
-%<*dvisvgm>
-% \end{macrocode}
-%
-% \subsubsection{Basics}
-%
-% \begin{macro}{\@@_literal_svg:n, \@@_literal_svg:x}
-% Unlike the other drivers, the requirements for making SVG files mean
-% that we can't conveniently transform all operations to the current point.
-% That makes life a bit more tricky later as that needs to be accounted for.
-% A new line is added after each call to help to keep the output readable
-% for debugging.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_literal_svg:n #1
- { \@@_literal:n { dvisvgm:raw~ #1 { ?nl } } }
-\cs_generate_variant:Nn \@@_literal_svg:n { x }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@@_scope_begin:, \@@_scope_end:}
-% A scope in SVG terms is slightly different to the other drivers as
-% operations have to be \enquote{tied} to these not simply inside them.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_scope_begin:
- { \@@_literal_svg:n { <g> } }
-\cs_new_protected:Npn \@@_scope_end:
- { \@@_literal_svg:n { </g> } }
-% \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{Driver-specific auxiliaries}
-%
-% \begin{macro}{\@@_scope_begin:n, \@@_scope_begin:x}
-% In SVG transformations, clips and so on are attached directly to scopes so
-% we need a way or allowing for that. This is rather more useful than
-% \cs{@@_scope_begin:} as a result. No assumptions are made about the nature
-% of the scoped operation(s).
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_scope_begin:n #1
- { \@@_literal_svg:n { <g~ #1 > } }
-\cs_generate_variant:Nn \@@_scope_begin:n { x }
-% \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{Box operations}
-%
-% \begin{macro}{\driver_box_use_clip:N}
-% \begin{variable}{\g_@@_clip_path_int}
-% Clipping in SVG is more involved than with other drivers. The first issue
-% is that the clipping path must be defined separately from where it is used,
-% so we need to track how many paths have applied. The naming here uses
-% \texttt{l3cp} as the namespace with a number following. Rather than use
-% a rectangular operation, we define the path manually as this allows it to
-% have a depth: easier than the alternative approach of shifting content
-% up and down using scopes to allow for the depth of the \TeX{} box and
-% keep the reference point the same!
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_box_use_clip:N #1
- {
- \int_gincr:N \g_@@_clip_path_int
- \@@_literal_svg:x
- { < clipPath~id = " l3cp \int_use:N \g_@@_clip_path_int " > }
- \@@_literal_svg:x
- {
- <
- path ~ d =
- "
- M ~ 0 ~
- \dim_to_decimal:n { -\box_dp:N #1 } ~
- L ~ \dim_to_decimal:n { \box_wd:N #1 } ~
- \dim_to_decimal:n { -\box_dp:N #1 } ~
- L ~ \dim_to_decimal:n { \box_wd:N #1 } ~
- \dim_to_decimal:n { \box_ht:N #1 + \box_dp:N #1 } ~
- L ~ 0 ~
- \dim_to_decimal:n { \box_ht:N #1 + \box_dp:N #1 } ~
- Z
- "
- />
- }
- \@@_literal_svg:n
- { < /clipPath > }
-% \end{macrocode}
-% In general the SVG set up does not try to transform coordinates to the
-% current point. For clipping we need to do that, so have a transformation
-% here to get us to the right place, and a matching one just before the
-% \TeX{} box is inserted to get things back on track. The clip path needs to
-% come between those two such that if lines up with the current point, as
-% does the \TeX{} box.
-% \begin{macrocode}
- \@@_scope_begin:n
- {
- transform =
- "
- translate ( { ?x } , { ?y } ) ~
- scale ( 1 , -1 )
- "
- }
- \@@_scope_begin:x
- {
- clip-path =
- "url ( \c_hash_str l3cp \int_use:N \g_@@_clip_path_int ) "
- }
- \@@_scope_begin:n
- {
- transform =
- "
- scale ( -1 , 1 ) ~
- translate ( { ?x } , { ?y } ) ~
- scale ( -1 , -1 )
- "
- }
- \box_use:N #1
- \@@_scope_end:
- \@@_scope_end:
- \@@_scope_end:
-% \skip_horizontal:n { \box_wd:N #1 }
- }
-\int_new:N \g_@@_clip_path_int
-% \end{macrocode}
-% \end{variable}
-% \end{macro}
-%
-% \begin{macro}{\driver_box_use_rotate:Nn}
-% Rotation has a dedicated operation which includes a centre-of-rotation
-% optional pair. That can be picked up from the driver syntax, so there is
-% no need to worry about the transformation matrix.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_box_use_rotate:Nn #1#2
- {
- \@@_scope_begin:x
- {
- transform =
- "
- rotate
- ( \fp_eval:n { round ( -(#2) , 5 ) } , ~ { ?x } , ~ { ?y } )
- "
- }
- \box_use:N #1
- \@@_scope_end:
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_box_use_scale:Nnn}
-% In contrast to rotation, we have to account for the current position in this
-% case. That is done using a couple of translations in addition to the scaling
-% (which is therefore done backward with a flip).
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_box_use_scale:Nnn #1#2#3
- {
- \@@_scope_begin:x
- {
- transform =
- "
- translate ( { ?x } , { ?y } ) ~
- scale
- (
- \fp_eval:n { round ( -#2 , 5 ) } ,
- \fp_eval:n { round ( -#3 , 5 ) }
- ) ~
- translate ( { ?x } , { ?y } ) ~
- scale ( -1 )
- "
- }
- \hbox_overlap_right:n { \box_use:N #1 }
- \@@_scope_end:
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{Images}
-%
-% \begin{macro}{\@@_image_getbb_png:n, \@@_image_getbb_jpg:n}
-% These can be included by extracting the bounding box data.
-% \begin{macrocode}
-\cs_new_eq:NN \@@_image_getbb_png:n \image_extract_bb:n
-\cs_new_eq:NN \@@_image_getbb_jpg:n \image_extract_bb:n
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@@_image_include_png:n, \@@_image_include_jpg:n}
-% \begin{macro}{\@@_image_include_bitmap_quote:w}
-% The driver here has built-in support for basic image inclusion (see
-% \texttt{dvisvgm.def} for a more complex approach, needed if clipping,
-% \emph{etc.}, is covered at the image driver level). The only issue is
-% that |#1| must be quote-corrected. The \texttt{dvisvgm:img} operation
-% quotes the file name, but if it is already quoted (contains spaces)
-% then we have an issue: we simply strip off any quotes as a result.
-% \begin{macrocode}
-\cs_new_protected:Npn \@@_image_include_png:n #1
- {
- \@@_literal:x
- {
- dvisvgm:img~
- \dim_to_decimal:n { \l_image_ury_dim } ~
- \dim_to_decimal:n { \l_image_ury_dim } ~
- \@@_image_include_bitmap_quote:w #1 " " \q_stop
- }
- }
-\cs_new_eq:NN \@@_image_include_jpg:n \@@_image_include_png:n
-\cs_new:Npn \@@_image_include_bitmap_quote:w #1 " #2 " #3 \q_stop
- { #1#2 }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-%
-% \subsubsection{PDF Features}
-%
-% \begin{macro}{\driver_pdf_object_new:n}
-% \begin{macro}[EXP]{\driver_pdf_object_ref:n}
-% \begin{macro}{\driver_pdf_ojbect_write:nn}
-% \begin{macro}{\driver_pdf_compresslevel:n}
-% \begin{macro}{\driver_pdf_objects_enable:, \driver_pdf_objects_disable:}
-% These are all no-ops.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_pdf_object_new:n #1 { }
-\cs_new:Npn \driver_pdf_object_ref:n #1 { }
-\cs_new_protected:Npn \driver_pdf_object_write:nn #1#2 { }
-\cs_new_protected:Npn \driver_pdf_compresslevel:n #1 { }
-\cs_new_protected:Npn \driver_pdf_objects_enable: { }
-\cs_new_protected:Npn \driver_pdf_objects_disable: { }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \subsubsection{Drawing}
-%
-% \begin{macro}{\@@_draw_literal:n, \@@_draw_literal:x}
-% The same as the more general literal call.
-% \begin{macrocode}
-\cs_new_eq:NN \@@_draw_literal:n \@@_literal_svg:n
-\cs_generate_variant:Nn \@@_draw_literal:n { x }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_begin:, \driver_draw_end:}
-% A drawing needs to be set up such that the co-ordinate system is
-% translated. That is done inside a scope, which as described below
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_begin:
- {
- \driver_draw_scope_begin:
- \@@_draw_scope:n { transform="translate({?x},{?y})~scale(1,-1)" }
- }
-\cs_new_protected:Npn \driver_draw_end:
- { \driver_draw_scope_end: }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_scope_begin:, \driver_draw_scope_end:}
-% \begin{macro}{\@@_draw_scope:n, \@@_draw_scope:x}
-% \begin{variable}{\g_@@_draw_scope_int, \l_@@_draw_scope_int}
-% Several settings that with other drivers are \enquote{stand alone} have
-% to be given as part of a scope in SVG. As a result, there is a need to
-% provide a mechanism to automatically close these extra scopes. That is
-% done using a dedicated function and a pair of tracking variables. Within
-% each graphics scope we use a global variable to do the work, with a group
-% used to save the value between scopes. The result is that no direct action
-% is needed when creating a scope.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_scope_begin:
- {
- \int_set_eq:NN
- \l_@@_draw_scope_int
- \g_@@_draw_scope_int
- \group_begin:
- \int_gzero:N \g_@@_draw_scope_int
- }
-\cs_new_protected:Npn \driver_draw_scope_end:
- {
- \prg_replicate:nn
- { \g_@@_draw_scope_int }
- { \@@_draw_literal:n { </g> } }
- \group_end:
- \int_gset_eq:NN
- \g_@@_draw_scope_int
- \l_@@_draw_scope_int
- }
-\cs_new_protected:Npn \@@_draw_scope:n #1
- {
- \@@_draw_literal:n { <g~ #1 > }
- \int_gincr:N \g_@@_draw_scope_int
- }
-\cs_generate_variant:Nn \@@_draw_scope:n { x }
-\int_new:N \g_@@_draw_scope_int
-\int_new:N \l_@@_draw_scope_int
-% \end{macrocode}
-% \end{variable}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_moveto:nn, \driver_draw_lineto:nn}
-% \begin{macro}{\driver_draw_rectangle:nnnn}
-% \begin{macro}{\driver_draw_curveto:nnnnnn}
-% \begin{macro}{\@@_draw_add_to_path:n}
-% \begin{variable}{\g_@@_draw_path_tl}
-% Once again, some work is needed to get path constructs correct. Rather
-% then write the values as they are given, the entire path needs to be
-% collected up before being output in one go. For that we use a dedicated
-% storage routine, which adds spaces as required. Since paths should
-% be fully expanded there is no need to worry about the internal
-% \texttt{x}-type expansion.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_moveto:nn #1#2
- {
- \@@_draw_add_to_path:n
- { M ~ \dim_to_decimal:n {#1} ~ \dim_to_decimal:n {#2} }
- }
-\cs_new_protected:Npn \driver_draw_lineto:nn #1#2
- {
- \@@_draw_add_to_path:n
- { L ~ \dim_to_decimal:n {#1} ~ \dim_to_decimal:n {#2} }
- }
-\cs_new_protected:Npn \driver_draw_rectangle:nnnn #1#2#3#4
- {
- \@@_draw_add_to_path:n
- {
- M ~ \dim_to_decimal:n {#1} ~ \dim_to_decimal:n {#2}
- h ~ \dim_to_decimal:n {#3} ~
- v ~ \dim_to_decimal:n {#4} ~
- h ~ \dim_to_decimal:n { -#3 } ~
- Z
- }
- }
-\cs_new_protected:Npn \driver_draw_curveto:nnnnnn #1#2#3#4#5#6
- {
- \@@_draw_add_to_path:n
- {
- C ~
- \dim_to_decimal:n {#1} ~ \dim_to_decimal:n {#2} ~
- \dim_to_decimal:n {#3} ~ \dim_to_decimal:n {#4} ~
- \dim_to_decimal:n {#5} ~ \dim_to_decimal:n {#6}
- }
- }
-\cs_new_protected:Npn \@@_draw_add_to_path:n #1
- {
- \tl_gset:Nx \g_@@_draw_path_tl
- {
- \g_@@_draw_path_tl
- \tl_if_empty:NF \g_@@_draw_path_tl { \c_space_tl }
- #1
- }
- }
-\tl_new:N \g_@@_draw_path_tl
-% \end{macrocode}
-% \end{variable}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_evenodd_rule:, \driver_draw_nonzero_rule:}
-% The fill rules here have to be handled as scopes.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_evenodd_rule:
- { \@@_draw_scope:n { fill-rule="evenodd" } }
-\cs_new_protected:Npn \driver_draw_nonzero_rule:
- { \@@_draw_scope:n { fill-rule="nonzero" } }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@@_draw_path:n}
-% \begin{macro}
-% {
-% \driver_draw_closepath: ,
-% \driver_draw_stroke: ,
-% \driver_draw_closestroke: ,
-% \driver_draw_fill: ,
-% \driver_draw_fillstroke: ,
-% \driver_draw_clip: ,
-% \driver_draw_discardpath:
-% }
-% \begin{variable}{\g_@@_draw_clip_bool}
-% \begin{variable}{\g_@@_draw_path_int}
-% Setting fill and stroke effects and doing clipping all has to be done using
-% scopes. This means setting up the various requirements in a shared
-% auxiliary which deals with the bits and pieces. Clipping paths are reused
-% for path drawing: not essential but avoids constructing them twice.
-% Discarding a path needs a separate function as it's not quite the same.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_closepath:
- { \@@_draw_add_to_path:n { Z } }
-\cs_new_protected:Npn \@@_draw_path:n #1
- {
- \bool_if:NTF \g_@@_draw_clip_bool
- {
- \int_gincr:N \g_@@_clip_path_int
- \@@_draw_literal:x
- {
- < clipPath~id = " l3cp \int_use:N \g_@@_clip_path_int " >
- { ?nl }
- <path~d=" \g_@@_draw_path_tl "/> { ?nl }
- < /clipPath > { ? nl }
- <
- use~xlink:href =
- "\c_hash_str l3path \int_use:N \g_@@_path_int " ~
- #1
- />
- }
- \@@_draw_scope:x
- {
- clip-path =
- "url( \c_hash_str l3cp \int_use:N \g_@@_clip_path_int)"
- }
- }
- {
- \@@_draw_literal:x
- { <path ~ d=" \g_@@_draw_path_tl " ~ #1 /> }
- }
- \tl_gclear:N \g_@@_draw_path_tl
- \bool_gset_false:N \g_@@_draw_clip_bool
- }
-\int_new:N \g_@@_path_int
-\cs_new_protected:Npn \driver_draw_stroke:
- { \@@_draw_path:n { style="fill:none" } }
-\cs_new_protected:Npn \driver_draw_closestroke:
- {
- \driver_draw_closepath:
- \driver_draw_stroke:
- }
-\cs_new_protected:Npn \driver_draw_fill:
- { \@@_draw_path:n { style="stroke:none" } }
-\cs_new_protected:Npn \driver_draw_fillstroke:
- { \@@_draw_path:n { } }
-\cs_new_protected:Npn \driver_draw_clip:
- { \bool_gset_true:N \g_@@_draw_clip_bool }
-\bool_new:N \g_@@_draw_clip_bool
-\cs_new_protected:Npn \driver_draw_discardpath:
- {
- \bool_if:NT \g_@@_draw_clip_bool
- {
- \int_gincr:N \g_@@_clip_path_int
- \@@_draw_literal:x
- {
- < clipPath~id = " l3cp \int_use:N \g_@@_clip_path_int " >
- { ?nl }
- <path~d=" \g_@@_draw_path_tl "/> { ?nl }
- < /clipPath >
- }
- \@@_draw_scope:x
- {
- clip-path =
- "url( \c_hash_str l3cp \int_use:N \g_@@_clip_path_int)"
- }
- }
- \tl_gclear:N \g_@@_draw_path_tl
- \bool_gset_false:N \g_@@_draw_clip_bool
- }
-% \end{macrocode}
-% \end{variable}
-% \end{variable}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_dash_pattern:nn}
-% \begin{macro}{\@@_draw_dash:n}
-% \begin{macro}{\@@_draw_dash_aux:nn}
-% \begin{macro}{\driver_draw_linewidth:n}
-% \begin{macro}{\driver_draw_miterlimit:n}
-% \begin{macro}
-% {
-% \driver_draw_cap_butt:, \driver_draw_cap_round:, \driver_draw_cap_rectangle:,
-% \driver_draw_join_miter:, \driver_draw_join_round:, \driver_draw_join_bevel:
-% }
-% All of these ideas are properties of scopes in SVG. The only slight
-% complexity is converting the dash array properly (doing any required
-% maths).
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_dash_pattern:nn #1#2
- {
- \use:x
- {
- \@@_draw_dash_aux:nn
- { \clist_map_function:nn {#1} \@@_draw_dash:n }
- { \dim_to_decimal:n {#2} }
- }
- }
-\cs_new:Npn \@@_draw_dash:n #1
- { , \dim_to_decimal_in_bp:n {#1} }
-\cs_new_protected:Npn \@@_draw_dash_aux:nn #1#2
- {
- \@@_draw_scope:x
- {
- stroke-dasharray =
- "
- \tl_if_empty:oTF { \use_none:n #1 }
- { none }
- { \use_none:n #1 }
- " ~
- stroke-offset=" #2 "
- }
- }
-\cs_new_protected:Npn \driver_draw_linewidth:n #1
- { \@@_draw_scope:x { stroke-width=" \dim_to_decimal:n {#1} " } }
-\cs_new_protected:Npn \driver_draw_miterlimit:n #1
- { \@@_draw_scope:x { stroke-miterlimit=" \fp_eval:n {#1} " } }
-\cs_new_protected:Npn \driver_draw_cap_butt:
- { \@@_draw_scope:n { stroke-linecap="butt" } }
-\cs_new_protected:Npn \driver_draw_cap_round:
- { \@@_draw_scope:n { stroke-linecap="round" } }
-\cs_new_protected:Npn \driver_draw_cap_rectangle:
- { \@@_draw_scope:n { stroke-linecap="square" } }
-\cs_new_protected:Npn \driver_draw_join_miter:
- { \@@_draw_scope:n { stroke-linejoin="miter" } }
-\cs_new_protected:Npn \driver_draw_join_round:
- { \@@_draw_scope:n { stroke-linejoin="round" } }
-\cs_new_protected:Npn \driver_draw_join_bevel:
- { \@@_draw_scope:n { stroke-linejoin="bevel" } }
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}
-% {
-% \driver_draw_color_fill_cmyk:nnnn ,
-% \driver_draw_color_stroke_cmyk:nnnn
-% }
-% \begin{macro}
-% {
-% \driver_draw_color_fill_gray:n ,
-% \driver_draw_color_stroke_gray:n
-% }
-% \begin{macro}
-% {
-% \driver_draw_color_fill_rgb:nnn ,
-% \driver_draw_color_stroke_rgb:nnn
-% }
-% \begin{macro}{\@@_draw_color_fill:nnn}
-% SVG fill color has to be covered outside of the stack, as for
-% \texttt{dvips}. Here, we are only allowed RGB colors so there is some
-% conversion to do.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_color_stroke_cmyk:nnnn #1#2#3#4
- {
- \use:x
- {
- \@@_draw_color_fill:nnn
- { \fp_eval:n { -100 * ( (#1) * ( 1 - (#4) ) - 1 ) } }
- { \fp_eval:n { -100 * ( (#2) * ( 1 - (#4) ) + #4 - 1 ) } }
- { \fp_eval:n { -100 * ( (#3) * ( 1 - (#4) ) + #4 - 1 ) } }
- }
- }
-\cs_new_eq:NN \driver_draw_color_stroke_cmyk:nnnn \driver_color_cmyk:nnnn
-\cs_new_protected:Npn \driver_draw_color_gray:n #1
- {
- \use:x
- {
- \@@_draw_color_gray_aux:n
- { \fp_eval:n { 100 * (#3) } }
- }
- }
-\cs_new_protected:Npn \@@_draw_color_gray_aux:n #1
- { \@@_draw_color_fill:nnn {#1} {#1} {#1} }
-\cs_new_eq:NN \driver_draw_color_stroke_gray:n \driver_color_gray:n
-\cs_new_protected:Npn \driver_draw_color_rgb:nnn #1#2#3
- {
- \use:x
- {
- \@@_draw_color_fill:nnn
- { \fp_eval:n { 100 * (#1) } }
- { \fp_eval:n { 100 * (#2) } }
- { \fp_eval:n { 100 * (#3) } }
- }
- }
-\cs_new_protected:Npn \@@_draw_color_fill:nnn #1#2#3
- {
- \@@_draw_scope:x
- {
- fill =
- "
- rgb
- (
- #1 \c_percent_str ,
- #2 \c_percent_str ,
- #3 \c_percent_str
- )
- "
- }
- }
-\cs_new_eq:NN \driver_draw_color_stroke_rgb:nnn \driver_color_rgb:nnn
-% \end{macrocode}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_cm:nnnn}
-% The four arguments here are floats (the affine matrix), the last
-% two are a displacement vector.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_cm:nnnn #1#2#3#4
- {
- \@@_draw_scope:n
- {
- transform =
- "
- matrix
- (
- \fp_eval:n {#1} , \fp_eval:n {#2} ,
- \fp_eval:n {#3} , \fp_eval:n {#4} ,
- 0pt , 0pt
- )
- "
- }
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\driver_draw_box_use:Nnnnn}
-% No special savings can be made here: simply displace the box inside
-% a scope. As there is nothing to re-box, just make the box passed of
-% zero size.
-% \begin{macrocode}
-\cs_new_protected:Npn \driver_draw_box_use:Nnnnn #1#2#3#4#5#6#7
- {
- \@@_scope_begin:
- \driver_draw_cm:nnnn {#2} {#3} {#4} {#5}
- \@@_literal_svg:n
- {
- < g~
- stroke="none"~
- transform="scale(-1,1)~translate({?x},{?y})~scale(-1,-1)"
- >
- }
- \box_set_wd:Nn #1 { 0pt }
- \box_set_ht:Nn #1 { 0pt }
- \box_set_dp:Nn #1 { 0pt }
- \box_use:N #1
- \@@_literal_svg:n { </g> }
- \@@_scope_end:
- }
-% \end{macrocode}
-% \end{macro}
-%
-% \begin{macrocode}
-%</dvisvgm>
-% \end{macrocode}
-%
-% \begin{macrocode}
-%</initex|package>
-% \end{macrocode}
+% Nothing to see here: everything is in the subfiles!
%
% \end{implementation}
%