From e0b99edff6ed76a9508681bcb4ae96311f430ea0 Mon Sep 17 00:00:00 2001
From: Cedric <ced@sdf.org>
Date: Tue, 21 Jan 2025 20:57:54 +0000
Subject: [PATCH] Add latest dvisvgm drive for tex4ht

commit f1707125de2f058634523b0b3391a7c7be2d6784
Author: Michal Hoftich <michal.h21@gmail.com>
Date:   Tue Oct 29 18:12:59 2024 +0100

    use \Picture* instead of \Picture+

from:
https://github.com/michal-h21/dvisvgm4ht.git (fetch)
---
 book/pgfsys-dvisvgm4ht.def | 75 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 book/pgfsys-dvisvgm4ht.def

diff --git a/book/pgfsys-dvisvgm4ht.def b/book/pgfsys-dvisvgm4ht.def
new file mode 100644
index 0000000..fd3bf78
--- /dev/null
+++ b/book/pgfsys-dvisvgm4ht.def
@@ -0,0 +1,75 @@
+% Copyright 2021-2024 by Michal Hoftich
+% Copyright 2006 by Till Tantau
+%
+% This file may be distributed and/or modified
+%
+% 1. under the LaTeX Project Public License and/or
+% 2. under the GNU Public License.
+%
+% See the file doc/generic/pgf/licenses/LICENSE for more details.
+
+\ProvidesFileRCS{pgfsys-dvisvgm4ht.def}
+
+% Driver commands for tex4ht
+
+%
+% Load common pdf commands:
+%
+
+% we switched to dvisvgm driver by default. it supports patterns and other features 
+% dvips driver is available through the tikz+ option. It doesn't support everything, 
+% but it worked better with nested pictures in the past.
+\ifdefined\ifOption
+\ifOption{tikz+}{\input pgfsys-dvips.def}{\input pgfsys-dvisvgm.def}
+\else
+% load the dvips driver by default
+\input pgfsys-dvisvgm.def
+\fi
+
+
+\catcode`\:=11%
+
+% we must call most of these redefinitions in \AtBeginDocument, because \HLet is available 
+% only at that moment
+\AtBeginDocument{%
+ % configure the output picture format to svg, as it will require dvisvgm
+ % post processing. 
+ \Configure{Picture}{.svg}%
+
+ % insert picture hooks to pgfsys commands 
+ % these redefinitions are usually called only with the \tikz command, 
+ % they are ignored in tikzpicture environment
+ \def\:tempa#1{%
+     \texfourht@tikz@begin%
+     \csname o:pgfsys@typesetpicturebox:\endcsname{#1}
+     \texfourht@tikz@end%
+ }
+ \HLet\pgfsys@typesetpicturebox\:tempa
+
+ % we must remove Picture-alt in \pgfsys@beginpicture, because it can result in alt text included in the image
+ \def\:tempa{\Configure{Picture-alt}{}\texfourht@tikz@begin\o:pgfsys@beginpicture:}
+ \HLet\pgfsys@beginpicture\:tempa
+ \let\o:pgfsys@endpicture:\pgfsys@endpicture
+ \def\:tempa{\o:pgfsys@endpicture:}
+ \HLet\pgfsys@endpicture\:tempa
+
+ %  start picture around TikZ and PGF environments
+ \ConfigureEnv{tikzpicture}{\begingroup\texfourht@tikz@begin}{\texfourht@tikz@end\endgroup}{}{}%
+ \ConfigureEnv{pgfpicture}{\begingroup\texfourht@tikz@begin}{\texfourht@tikz@end\endgroup}{}{}%
+}
+
+\def\texfourht@tikz@begin{
+  \protect\csname nested:math\endcsname% support display math
+  \Picture*[\csname a:Picture-alt\endcsname]{}%
+}
+\def\texfourht@tikz@end{\EndPicture}
+
+\catcode`\:=12%
+
+
+\endinput
+
+
+%%% Local Variables:
+%%% mode: latex
+%%% End: