3 files changed, 21 insertions, 9 deletions
diff --git a/support/TeX4ht/source/ChangeLog b/support/TeX4ht/source/ChangeLog
index eb851e0e66..b7ad95ba12 100644
--- a/support/TeX4ht/source/ChangeLog
+++ b/support/TeX4ht/source/ChangeLog
@@ -1,3 +1,13 @@
+2022-12-24  Michal Hoftich  <michal.h21@gmail.com>
+
+	* tex4ht-4ht.tex (mdframed.4ht): fixed support for Mdframed used
+	inside of \Picture*.
+	https://tex.stackexchange.com/a/669526/2891
+
+	* tex4ht-html4.tex (html4.4ht): added support for the inclusion of
+	MPS images.
+	https://tex.stackexchange.com/a/669526/2891
+
 2022-12-23  Michal Hoftich  <michal.h21@gmail.com>
 
 	* tex4ht-html4.tex (html4.4ht): fixed paragraph handling in the
diff --git a/support/TeX4ht/source/tex4ht-4ht.tex b/support/TeX4ht/source/tex4ht-4ht.tex
index 30a73224d3..2e301d2010 100644
--- a/support/TeX4ht/source/tex4ht-4ht.tex
+++ b/support/TeX4ht/source/tex4ht-4ht.tex
@@ -1,4 +1,4 @@
-% $Id: tex4ht-4ht.tex 1268 2022-12-16 15:18:27Z michal_h21 $
+% $Id: tex4ht-4ht.tex 1276 2022-12-24 12:44:15Z michal_h21 $
 % tex tex4ht-4ht   or   ht tex tex4ht-4ht
 %
 % Copyright 2009-2022 TeX Users Group    
@@ -27997,7 +27997,7 @@ We need to use dvips driver with XeLaTeX
 
 \<mdframed.4ht\><<<
 % mdframed.4ht (|version), generated from |jobname.tex
-% Copyright 2017-2021 TeX Users Group
+% Copyright 2017-2022 TeX Users Group
 |<TeX4ht license text|>
 
 \NewConfigure{mdframed}{2}
@@ -28005,18 +28005,20 @@ We need to use dvips driver with XeLaTeX
 \NewConfigure{mdframetitle}{2}
 \newcount\mdf:env:cnt
 \def\mdf:id{mdframed-\the\mdf:env:cnt}
-\def\mdf@trivlist#1{\global\advance\mdf:env:cnt by1\relax\a:mdframed\a:mdframedstyle%
+\def\:tempa#1{\global\advance\mdf:env:cnt by1\relax\a:mdframed\a:mdframedstyle%
     \ifdefempty{\mdf@frametitle}{}{\mdfframedtitleenv{\mdf@frametitle}\a:mdframetitle\mdf@@frametitle@use\b:mdframetitle}\let\mdf@frametitle\@empty%
 }
+\HLet\mdf@trivlist\:tempa
 
-\def\endmdf@trivlist{\b:mdframed}
+\def\:tempa{\b:mdframed}
+\HLet\endmdf@trivlist\:tempa
 
 % disable frame drawing, it can be supported using CSS
-\def\detected@mdf@put@frame{}%
+\HLet\detected@mdf@put@frame\relax%
 
 \append:def\mdf@@ignorelastdescenders{\let\orig:unskip\unskip\def\unskip{\let\unskip\orig:unskip}}%
-\def\mdf@lrbox#1{}
-\def\endmdf@lrbox{}
+\HLet\mdf@lrbox\:gobble
+\HLet\endmdf@lrbox\relax
 \Hinput{mdframed}
 \endinput
 >>> \AddFile{9}{mdframed}
diff --git a/support/TeX4ht/source/tex4ht-html4.tex b/support/TeX4ht/source/tex4ht-html4.tex
index 4d341ee3ff..4642e59faf 100644
--- a/support/TeX4ht/source/tex4ht-html4.tex
+++ b/support/TeX4ht/source/tex4ht-html4.tex
@@ -1,4 +1,4 @@
-% $Id: tex4ht-html4.tex 1274 2022-12-23 13:35:49Z michal_h21 $
+% $Id: tex4ht-html4.tex 1275 2022-12-24 12:38:23Z michal_h21 $
 % Compile 4 times: latex tex4ht-html4
 % Copy html4.4ht into the work directory before all but the last compilation.
 %
@@ -14029,7 +14029,7 @@ Declare default graphics extensions supported in HTML or converted to these
 supported formats by tex4ht.
 
 \<graphics default extensions\><<<
-\DeclareGraphicsExtensions{.png,.svg,.jpg,.eps,.pdf}
+\DeclareGraphicsExtensions{.png,.svg,.jpg,.eps,.pdf,.mps}
 >>>