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|
% \iffalse meta-comment
%
%% File: l3draw-state.dtx
%
% Copyright (C) 2018,2019 The LaTeX3 Project
%
% It may be distributed and/or modified under the conditions of the
% LaTeX Project Public License (LPPL), either version 1.3c of this
% license or (at your option) any later version. The latest version
% of this license is in the file
%
% http://www.latex-project.org/lppl.txt
%
% This file is part of the "l3experimental bundle" (The Work in LPPL)
% and all files in that bundle must be distributed together.
%
% -----------------------------------------------------------------------
%
% The development version of the bundle can be found at
%
% https://github.com/latex3/latex3
%
% for those people who are interested.
%
%<*driver>
\RequirePackage{expl3}
\documentclass[full]{l3doc}
\begin{document}
\DocInput{\jobname.dtx}
\end{document}
%</driver>
% \fi
%
% \title{^^A
% The \pkg{l3draw-state} package\\ Drawing graphics state^^A
% }
%
% \author{^^A
% The \LaTeX3 Project\thanks
% {^^A
% E-mail:
% \href{mailto:latex-team@latex-project.org}
% {latex-team@latex-project.org}^^A
% }^^A
% }
%
% \date{Released 2019-08-25}
%
% \maketitle
%
% \begin{implementation}
%
% \section{\pkg{l3draw-state} implementation}
%
% \begin{macrocode}
%<*initex|package>
% \end{macrocode}
%
% \begin{macrocode}
%<@@=draw>
% \end{macrocode}
%
% This sub-module covers more-or-less the same ideas as
% \texttt{pgfcoregraphicstate.code.tex}. At present, equivalents of the
% following are currently absent:
% \begin{itemize}
% \item \cs{pgfsetinnerlinewidth}, \cs{pgfinnerlinewidth},
% \cs{pgfsetinnerstrokecolor}, \cs{pgfsetinnerstrokecolor}: Likely to
% be added on further work is done on paths/stroking.
% \end{itemize}
%
% \begin{variable}{\g_@@_linewidth_dim}
% Linewidth for strokes: global as the scope for this relies on the graphics
% state. The inner line width is used for places where two lines are used.
% \begin{macrocode}
\dim_new:N \g_@@_linewidth_dim
% \end{macrocode}
% \end{variable}
%
% \begin{variable}{\l_draw_default_linewidth_dim}
% A default: this is used at the start of every drawing.
% \begin{macrocode}
\dim_new:N \l_draw_default_linewidth_dim
\dim_set:Nn \l_draw_default_linewidth_dim { 0.4pt }
% \end{macrocode}
% \end{variable}
%
% \begin{macro}{\draw_linewidth:n}
% Set the linewidth: we need a wrapper as this has to pass to the driver
% layer.
% \begin{macrocode}
\cs_new_protected:Npn \draw_linewidth:n #1
{
\dim_gset:Nn \g_@@_linewidth_dim { \fp_to_dim:n {#1} }
\@@_backend_linewidth:n \g_@@_linewidth_dim
}
% \end{macrocode}
% \end{macro}
%
% \begin{macro}{\draw_dash_pattern:nn}
% \begin{variable}{\l_@@_tmp_seq}
% Evaluated all of the list and pass it to the driver layer.
% \begin{macrocode}
\cs_new_protected:Npn \draw_dash_pattern:nn #1#2
{
\group_begin:
\seq_set_from_clist:Nn \l_@@_tmp_seq {#1}
\seq_set_map:NNn \l_@@_tmp_seq \l_@@_tmp_seq
{ \fp_to_dim:n {##1} }
\use:x
{
\@@_backend_dash_pattern:nn
{ \seq_use:Nn \l_@@_tmp_seq { , } }
{ \fp_to_dim:n {#2} }
}
\group_end:
}
\seq_new:N \l_@@_tmp_seq
% \end{macrocode}
% \end{variable}
% \end{macro}
%
% \begin{macro}{\draw_miterlimit:n}
% Pass through to the driver layer.
% \begin{macrocode}
\cs_new_protected:Npn \draw_miterlimit:n #1
{ \@@_backend_miterlimit:n { \fp_eval:n {#1} } }
% \end{macrocode}
% \end{macro}
%
% \begin{macro}
% {
% \draw_cap_butt:, \draw_cap_rectangle:, \draw_cap_round:,
% \draw_evenodd_rule:, \draw_nonzero_rule:,
% \draw_join_bevel:, \draw_join_miter:, \draw_join_round:
% }
% All straight wrappers.
% \begin{macrocode}
\cs_new_protected:Npn \draw_cap_butt: { \@@_backend_cap_butt: }
\cs_new_protected:Npn \draw_cap_rectangle: { \@@_backend_cap_rectangle: }
\cs_new_protected:Npn \draw_cap_round: { \@@_backend_cap_round: }
\cs_new_protected:Npn \draw_evenodd_rule: { \@@_backend_evenodd_rule: }
\cs_new_protected:Npn \draw_nonzero_rule: { \@@_backend_nonzero_rule: }
\cs_new_protected:Npn \draw_join_bevel: { \@@_backend_join_bevel: }
\cs_new_protected:Npn \draw_join_miter: { \@@_backend_join_miter: }
\cs_new_protected:Npn \draw_join_round: { \@@_backend_join_round: }
% \end{macrocode}
% \end{macro}
%
% \begin{variable}{\l_@@_color_tmp_tl}
% Scratch space.
% \begin{macrocode}
\tl_new:N \l_@@_color_tmp_tl
% \end{macrocode}
% \end{variable}
%
% \begin{macro}{\draw_color:n, \draw_color_fill:n, \draw_color_stroke:n}
% \begin{macro}{\@@_color:nn}
% \begin{macro}{\@@_color_aux:nn, \@@_color_aux:Vn}
% \begin{macro}{\@@_color:nw}
% \begin{macro}
% {
% \@@_select_cmyk:nw, \@@_select_gray:nw,
% \@@_select_rgb:nw, \@@_split_select:nw
% }
% Much the same as for core color support but calling the relevant
% driver-level function.
% \begin{macrocode}
\cs_new_eq:NN \draw_color:n \color_select:n
\cs_new_protected:Npn \draw_color_fill:n #1
{ \@@_color:nn { fill } {#1} }
\cs_new_protected:Npn \draw_color_stroke:n #1
{ \@@_color:nn { stroke } {#1} }
\cs_new_protected:Npn \@@_color:nn #1#2
{
\color_parse:nN {#2} \l_@@_color_tmp_tl
\@@_color_aux:Vn \l_@@_color_tmp_tl {#1}
}
\cs_new_protected:Npn \@@_color_aux:nn #1#2
{ \@@_color:nw {#2} #1 \q_stop }
\cs_generate_variant:Nn \@@_color_aux:nn { V }
\cs_new_protected:Npn \@@_color:nw #1#2 ~ #3 \q_stop
{ \use:c { @@_color_ #2 :nw } {#1} #3 \q_stop }
\cs_new_protected:Npn \@@_color_cmyk:nw #1#2 ~ #3 ~ #4 ~ #5 \q_stop
{ \use:c { @@_backend_color_ #1 _cmyk:nnnn } {#2} {#3} {#4} {#5} }
\cs_new_protected:Npn \@@_color_gray:nw #1#2 \q_stop
{ \use:c { @@_backend_color_ #1 _gray:n } {#2} }
\cs_new_protected:Npn \@@_color_rgb:nw #1#2 ~ #3 ~ #4 \q_stop
{ \use:c { @@_backend_color_ #1 _rgb:nnn } {#2} {#3} {#4} }
\cs_new_protected:Npn \@@_color_spot:nw #1#2 ~ #3 \q_stop
{ \use:c { @@_backend_color_ #1 _spot:nn } {#2} {#3} }
% \end{macrocode}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
% \end{macro}
%
% \begin{macrocode}
%</initex|package>
% \end{macrocode}
%
% \end{implementation}
%
% \PrintIndex
|
