A very preliminar new plug-in on multithreaded transforms

This is just the first try to get a new plugin type and a working example. Manuals are still missing. Basically a plug-in of this type adds multicore capabilities. May be used for GPU in future.

27 files changed, 5273 insertions, 2 deletions

diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index 3e04f59..ccc078a 100644
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -1 +1 @@
-SUBDIRS = fast_float
+SUBDIRS = fast_float threaded
diff --git a/plugins/README.1ST b/plugins/README.1ST
index c8ab286..ba02de2 100644
--- a/plugins/README.1ST
+++ b/plugins/README.1ST
@@ -2,5 +2,5 @@
  
  IMPORTANT: Before adding those plug-ins to your commercial project, please check licenses for each plugin. 
 
- LittleCMS core is released under MIT, but plug-ins may be released under other license. fast_float, for example is GPL3
+ LittleCMS core is released under MIT, but plug-ins may be released under other license. fast_float and threaded are GPL3
  
\ No newline at end of file
diff --git a/plugins/threaded/COPYING.GPL3 b/plugins/threaded/COPYING.GPL3
new file mode 100644
index 0000000..20d40b6
--- /dev/null
+++ b/plugins/threaded/COPYING.GPL3
@@ -0,0 +1,674 @@
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+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
\ No newline at end of file
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+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-recursive
+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
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+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
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+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
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+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
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+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
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+	    || cp -p $$d/$$file "$(distdir)/$$file" \
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+	    $(am__make_dryrun) \
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+	    echo " (cd $$subdir && $(MAKE) $(AM_MAKEFLAGS) top_distdir="$$new_top_distdir" distdir="$$new_distdir" \\"; \
+	    echo "     am__remove_distdir=: am__skip_length_check=: am__skip_mode_fix=: distdir)"; \
+	    ($(am__cd) $$subdir && \
+	      $(MAKE) $(AM_MAKEFLAGS) \
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+		am__remove_distdir=: \
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+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
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+	@echo "it deletes files that may require special tools to rebuild."
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+
+clean-am: clean-generic clean-libtool mostlyclean-am
+
+distclean: distclean-recursive
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+
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+dvi-am:
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+html: html-recursive
+
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+info: info-recursive
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+info-am:
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+install-exec-am:
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+install-html: install-html-recursive
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+install-html-am:
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+install-info: install-info-recursive
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+install-info-am:
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+install-man:
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+install-pdf: install-pdf-recursive
+
+install-pdf-am:
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+install-ps: install-ps-recursive
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+install-ps-am:
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+installcheck-am:
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+maintainer-clean: maintainer-clean-recursive
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+maintainer-clean-am: distclean-am maintainer-clean-generic
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+mostlyclean: mostlyclean-recursive
+
+mostlyclean-am: mostlyclean-generic mostlyclean-libtool
+
+pdf: pdf-recursive
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+pdf-am:
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+ps: ps-recursive
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+ps-am:
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+uninstall-am:
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+.MAKE: $(am__recursive_targets) install-am install-strip
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+.PHONY: $(am__recursive_targets) CTAGS GTAGS TAGS all all-am check \
+	check-am clean clean-generic clean-libtool cscopelist-am ctags \
+	ctags-am distclean distclean-generic distclean-libtool \
+	distclean-tags distdir dvi dvi-am html html-am info info-am \
+	install install-am install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am install-man \
+	install-pdf install-pdf-am install-ps install-ps-am \
+	install-strip installcheck installcheck-am installdirs \
+	installdirs-am maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-generic mostlyclean-libtool pdf pdf-am \
+	ps ps-am tags tags-am uninstall uninstall-am
+
+.PRECIOUS: Makefile
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+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/plugins/threaded/Projects/VC2022/lcms2_threaded_plugin.vcxproj b/plugins/threaded/Projects/VC2022/lcms2_threaded_plugin.vcxproj
new file mode 100644
index 0000000..135a586
--- /dev/null
+++ b/plugins/threaded/Projects/VC2022/lcms2_threaded_plugin.vcxproj
@@ -0,0 +1,274 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\include\lcms2_threaded.h" />
+    <ClInclude Include="..\..\src\threaded_internal.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="..\..\COPYING.GPL3" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\..\Projects\VC2022\lcms2_static\lcms2_static.vcxproj">
+      <Project>{71dede59-3f1e-486b-a899-4283000f76b5}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\src\threaded_core.c" />
+    <ClCompile Include="..\..\src\threaded_main.c" />
+    <ClCompile Include="..\..\src\threaded_split.c" />
+    <ClCompile Include="..\..\src\threaded_scheduler.c" />
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{6A44744B-BED4-49EC-87BB-83978458CE19}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>fast</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v143</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v143</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v143</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v143</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v143</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v143</PlatformToolset>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+    <IntDir>$(Platform)\threaded_plugin_$(Configuration)\</IntDir>
+    <OutDir>..\..\..\..\Lib\MS\</OutDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+    <IntDir>$(Platform)\threaded_plugin_$(Configuration)\</IntDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
+    <IntDir>$(Platform)\threaded_plugin_$(Configuration)\</IntDir>
+    <OutDir>..\..\..\..\Lib\MS\</OutDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <IntDir>$(Platform)\threaded_plugin_$(Configuration)\</IntDir>
+    <OutDir>..\..\..\..\Lib\MS\</OutDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <IntDir>$(Platform)\threaded_plugin_$(Configuration)\</IntDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <IntDir>$(Platform)\threaded_plugin_$(Configuration)\</IntDir>
+    <OutDir>..\..\..\..\Lib\MS\</OutDir>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level4</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\include;..\..\..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <FloatingPointModel>Fast</FloatingPointModel>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM64'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level4</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\include;..\..\..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <FloatingPointModel>Fast</FloatingPointModel>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level4</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;WIN64;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\include;..\..\..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <FloatingPointModel>Fast</FloatingPointModel>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level4</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\include;..\..\..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <BrowseInformation>false</BrowseInformation>
+      <InlineFunctionExpansion>AnySuitable</InlineFunctionExpansion>
+      <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
+      <OmitFramePointers>true</OmitFramePointers>
+      <EnableFiberSafeOptimizations>true</EnableFiberSafeOptimizations>
+      <FloatingPointModel>Fast</FloatingPointModel>
+      <EnableParallelCodeGeneration>true</EnableParallelCodeGeneration>
+      <EnableEnhancedInstructionSet>StreamingSIMDExtensions2</EnableEnhancedInstructionSet>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+    <Bscmake>
+      <PreserveSbr>true</PreserveSbr>
+    </Bscmake>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|ARM64'">
+    <ClCompile>
+      <WarningLevel>Level4</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\include;..\..\..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <BrowseInformation>false</BrowseInformation>
+      <InlineFunctionExpansion>AnySuitable</InlineFunctionExpansion>
+      <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
+      <OmitFramePointers>true</OmitFramePointers>
+      <EnableFiberSafeOptimizations>true</EnableFiberSafeOptimizations>
+      <FloatingPointModel>Fast</FloatingPointModel>
+      <EnableParallelCodeGeneration>true</EnableParallelCodeGeneration>
+      <EnableEnhancedInstructionSet>StreamingSIMDExtensions2</EnableEnhancedInstructionSet>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+    <Bscmake>
+      <PreserveSbr>true</PreserveSbr>
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+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level4</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;WIN64;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\include;..\..\..\..\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <InlineFunctionExpansion>AnySuitable</InlineFunctionExpansion>
+      <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
+      <OmitFramePointers>true</OmitFramePointers>
+      <EnableFiberSafeOptimizations>true</EnableFiberSafeOptimizations>
+      <EnableParallelCodeGeneration>true</EnableParallelCodeGeneration>
+      <FloatingPointModel>Fast</FloatingPointModel>
+      <EnableEnhancedInstructionSet>StreamingSIMDExtensions2</EnableEnhancedInstructionSet>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/plugins/threaded/Projects/VC2022/lcms2_threaded_plugin.vcxproj.filters b/plugins/threaded/Projects/VC2022/lcms2_threaded_plugin.vcxproj.filters
new file mode 100644
index 0000000..c0bad06
--- /dev/null
+++ b/plugins/threaded/Projects/VC2022/lcms2_threaded_plugin.vcxproj.filters
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{7d5b1769-2be4-46f2-9e35-6260eea79d7f}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="doc">
+      <UniqueIdentifier>{012df308-35db-4909-b035-b1cd5fd1ee5b}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\include\lcms2_threaded.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\src\threaded_internal.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="..\..\COPYING.GPL3">
+      <Filter>doc</Filter>
+    </None>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\src\threaded_split.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\src\threaded_scheduler.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\src\threaded_core.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\src\threaded_main.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/plugins/threaded/Projects/VC2022/lcms2_threaded_plugin_testbed.vcxproj b/plugins/threaded/Projects/VC2022/lcms2_threaded_plugin_testbed.vcxproj
new file mode 100644
index 0000000..eb8dd68
--- /dev/null
+++ b/plugins/threaded/Projects/VC2022/lcms2_threaded_plugin_testbed.vcxproj
@@ -0,0 +1,238 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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+    <ProjectConfiguration Include="Debug|ARM64">
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+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
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+	$(am__cd) $(top_srcdir) && \
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+	  *config.status*) \
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+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
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+	list='$(DISTFILES)'; \
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+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
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+	      install; \
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+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
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+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
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diff --git a/plugins/threaded/include/lcms2_threaded.h b/plugins/threaded/include/lcms2_threaded.h
new file mode 100644
index 0000000..6bd38be
--- /dev/null
+++ b/plugins/threaded/include/lcms2_threaded.h
@@ -0,0 +1,59 @@
+//---------------------------------------------------------------------------------
+//
+//  Little Color Management System, multithread extensions
+//  Copyright (c) 1998-2022 Marti Maria Saguer, all rights reserved
+//
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+//---------------------------------------------------------------------------------
+
+#ifndef _LCMS2_THREADED_H
+#define _LCMS2_THREADED_H
+
+#include "lcms2_plugin.h"
+
+#ifdef CMS_NO_PTHREADS
+#error "This plug-in needs pthreads to operate"
+#endif
+
+#ifndef CMS_USE_CPP_API
+#   ifdef __cplusplus
+extern "C" {
+#   endif
+#endif
+
+#define LCMS2_THREADED_VERSION   1000
+
+// Configuration toggles
+
+// The one and only plug-in entry point. To install this plugin in your code you need to place this in 
+// some initialization place. IOf you want to combine this plug-in with fastfloat, make sure to call 
+// the threaded entry point comes last in chain.
+//
+//  cmsPlugin(cmsThreadedExtensions(CMS_THREADED_GUESS_MAX_THREADS));
+// 
+
+#define CMS_THREADED_GUESS_MAX_THREADS -1
+
+CMSAPI void* CMSEXPORT cmsThreadedExtensions(cmsInt32Number max_threads, cmsUInt32Number flags);
+
+#ifndef CMS_USE_CPP_API
+#   ifdef __cplusplus
+    }
+#   endif
+#endif
+
+#endif
+
diff --git a/plugins/threaded/src/Makefile.am b/plugins/threaded/src/Makefile.am
new file mode 100644
index 0000000..13420c7
--- /dev/null
+++ b/plugins/threaded/src/Makefile.am
@@ -0,0 +1,27 @@
+#
+# Makefile for building lcms2_threaded plugin
+#
+
+# Don't require all the GNU mandated files
+AUTOMAKE_OPTIONS = 1.7 foreign
+
+includedir = ${prefix}/include
+
+# Shared libraries built in this directory
+lib_LTLIBRARIES = liblcms2_threaded.la
+
+LIBRARY_CURRENT    = 1
+LIBRARY_REVISION   = 0
+LIBRARY_AGE        = 0
+
+AM_CPPFLAGS = -Ofast -I$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir)/../include -I$(builddir)/../include
+
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+  -version-info $(LIBRARY_CURRENT):$(LIBRARY_REVISION):$(LIBRARY_AGE)
+
+liblcms2_threaded_la_LIBADD = $(LCMS_LIB_DEPLIBS) $(top_builddir)/src/liblcms2.la  
+
+liblcms2_threaded_la_SOURCES = threaded_split.c threaded_core.c threaded_main.c  threaded_scheduler.c threaded_internal.h
+
+
+
diff --git a/plugins/threaded/src/Makefile.in b/plugins/threaded/src/Makefile.in
new file mode 100644
index 0000000..f420a00
--- /dev/null
+++ b/plugins/threaded/src/Makefile.in
@@ -0,0 +1,759 @@
+# Makefile.in generated by automake 1.16.3 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2020 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
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+
+#
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+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES)
+installdirs:
+	for dir in "$(DESTDIR)$(libdir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libLTLIBRARIES clean-libtool \
+	mostlyclean-am
+
+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/fast_16_tethra.Plo
+	-rm -f ./$(DEPDIR)/fast_8_curves.Plo
+	-rm -f ./$(DEPDIR)/fast_8_matsh.Plo
+	-rm -f ./$(DEPDIR)/fast_8_matsh_sse.Plo
+	-rm -f ./$(DEPDIR)/fast_8_tethra.Plo
+	-rm -f ./$(DEPDIR)/fast_float_15bits.Plo
+	-rm -f ./$(DEPDIR)/fast_float_15mats.Plo
+	-rm -f ./$(DEPDIR)/fast_float_cmyk.Plo
+	-rm -f ./$(DEPDIR)/fast_float_curves.Plo
+	-rm -f ./$(DEPDIR)/fast_float_lab.Plo
+	-rm -f ./$(DEPDIR)/fast_float_matsh.Plo
+	-rm -f ./$(DEPDIR)/fast_float_separate.Plo
+	-rm -f ./$(DEPDIR)/fast_float_sup.Plo
+	-rm -f ./$(DEPDIR)/fast_float_tethra.Plo
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-libLTLIBRARIES
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+		-rm -f ./$(DEPDIR)/fast_16_tethra.Plo
+	-rm -f ./$(DEPDIR)/fast_8_curves.Plo
+	-rm -f ./$(DEPDIR)/fast_8_matsh.Plo
+	-rm -f ./$(DEPDIR)/fast_8_matsh_sse.Plo
+	-rm -f ./$(DEPDIR)/fast_8_tethra.Plo
+	-rm -f ./$(DEPDIR)/fast_float_15bits.Plo
+	-rm -f ./$(DEPDIR)/fast_float_15mats.Plo
+	-rm -f ./$(DEPDIR)/fast_float_cmyk.Plo
+	-rm -f ./$(DEPDIR)/fast_float_curves.Plo
+	-rm -f ./$(DEPDIR)/fast_float_lab.Plo
+	-rm -f ./$(DEPDIR)/fast_float_matsh.Plo
+	-rm -f ./$(DEPDIR)/fast_float_separate.Plo
+	-rm -f ./$(DEPDIR)/fast_float_sup.Plo
+	-rm -f ./$(DEPDIR)/fast_float_tethra.Plo
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-libLTLIBRARIES
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-generic clean-libLTLIBRARIES clean-libtool cscopelist-am \
+	ctags ctags-am distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-libLTLIBRARIES install-man install-pdf \
+	install-pdf-am install-ps install-ps-am install-strip \
+	installcheck installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags tags-am uninstall uninstall-am uninstall-libLTLIBRARIES
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/plugins/threaded/src/threaded_core.c b/plugins/threaded/src/threaded_core.c
new file mode 100644
index 0000000..88f617b
--- /dev/null
+++ b/plugins/threaded/src/threaded_core.c
@@ -0,0 +1,155 @@
+//---------------------------------------------------------------------------------
+//
+//  Little Color Management System, multithread extensions
+//  Copyright (c) 1998-2022 Marti Maria Saguer, all rights reserved
+//
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+//---------------------------------------------------------------------------------
+
+#include "threaded_internal.h"
+
+// This is the threading support. Unfortunately, it has to be platform-dependent because 
+// windows does not support pthreads. 
+#ifdef CMS_IS_WINDOWS_
+
+#define WIN32_LEAN_AND_MEAN 1
+#include <windows.h>
+
+// To pass parameter to the thread
+typedef struct
+{
+    _cmsTransform2Fn worker;
+    _cmsWorkSlice* param;
+
+} thread_adaptor_param;
+
+
+// This is an adaptor to the native thread on windows
+static
+DWORD WINAPI thread_adaptor(LPVOID p)
+{
+    thread_adaptor_param* ap = (thread_adaptor_param*)p;
+    _cmsWorkSlice* s = ap->param;
+
+    ap->worker(s->CMMcargo, s->InputBuffer, s->OutputBuffer, 
+               s->PixelsPerLine, s->LineCount, s->Stride);
+    _cmsFree(0, p);
+    return 0;
+}
+
+// This function creates a thread and executes it. The thread calls the worker function
+// with the given parameters.
+cmsHANDLE _cmsThrCreateWorker(cmsContext ContextID, _cmsTransform2Fn worker, _cmsWorkSlice* param)
+{
+    DWORD ThreadID;
+    thread_adaptor_param* p;
+    HANDLE handle;
+
+    p = (thread_adaptor_param*)_cmsMalloc(0, sizeof(thread_adaptor_param));
+    if (p == NULL) return NULL;
+
+    p->worker = worker;
+    p->param = param;
+
+    handle  = CreateThread(NULL, 0, thread_adaptor, (LPVOID) p, 0, &ThreadID);
+    if (handle == NULL)
+    {
+        cmsSignalError(ContextID, cmsERROR_UNDEFINED, "Cannot create thread");
+    }
+
+    return (cmsHANDLE)handle;
+}
+
+// Waits until given thread is ended
+void _cmsThrJoinWorker(cmsContext ContextID, cmsHANDLE hWorker)
+{
+    if (WaitForSingleObject((HANDLE)hWorker, INFINITE) != WAIT_OBJECT_0)
+    {
+        cmsSignalError(ContextID, cmsERROR_UNDEFINED, "Cannot join thread");
+    }
+}
+
+// Returns the ideal number of threads the system can run
+cmsInt32Number _cmsThrIdealThreadCount(void)
+{
+    SYSTEM_INFO sysinfo;
+
+    GetSystemInfo(&sysinfo);
+    return sysinfo.dwNumberOfProcessors; //Returns the number of processors in the system.
+}
+
+#else
+
+// Rest of the wide world
+#include <pthread.h>
+#include <unistd.h>
+
+// To pass parameter to the thread
+typedef struct
+{
+    _cmsTransform2Fn worker;
+    _cmsWorkSlice* param;
+
+} thread_adaptor_param;
+
+
+// This is the native thread on pthread
+static
+void thread_adaptor(void* p)
+{
+    thread_adaptor_param* ap = (thread_adaptor_param*)p;
+    _cmsWorkSlice* s = ap->param;
+
+    ap->worker(s->CMMcargo, s->InputBuffer, s->OutputBuffer,
+               s->PixelsPerLine, s->LineCount, &s->Stride);
+}
+
+// This function creates a thread and executes it. The thread calls the worker function
+// with the given parameters.
+cmsHANDLE _cmsThrCreateWorker(cmsContext ContextID, _cmsTransform2Fn worker, _cmsWorkSlice* param)
+{
+    pthread_t threadId;
+
+    int err = pthread_create(&threadId, NULL, thread_adaptor, param);
+    if (err != 0)
+    {
+        cmsSignalError(ContextID, cmsERROR_UNDEFINED, "Cannot create thread [pthread error %d]", err);
+        return NULL;
+    }
+    else
+        return (cmsHANDLE) threadId;
+}
+
+// Waits until given thread is ended
+void _cmsThrJoinWorker(cmsContext ContextID, cmsHANDLE hWorker)
+{
+    int err = pthread_join((pthread_t)hWorker, NULL);
+    if (err != 0)
+    {
+        cmsSignalError(ContextID, cmsERROR_UNDEFINED, "Cannot join thread [pthread error %d]", err); 
+    }
+}
+
+cmsInt32Number _cmsThrIdealThreadCount(void)
+{    
+    long cores = sysconf(_SC_NPROCESSORS_ONLN);
+    if (cores == -1L)
+        return 1;
+    else
+        return (cmsInt32Number)cores;
+}
+
+#endif
diff --git a/plugins/threaded/src/threaded_internal.h b/plugins/threaded/src/threaded_internal.h
new file mode 100644
index 0000000..e5dc9ff
--- /dev/null
+++ b/plugins/threaded/src/threaded_internal.h
@@ -0,0 +1,79 @@
+//---------------------------------------------------------------------------------
+//
+//  Little Color Management System, multithreaded extensions
+//  Copyright (c) 1998-2022 Marti Maria Saguer, all rights reserved
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+//---------------------------------------------------------------------------------
+
+#ifndef _THREADED_INTERNAL_H
+#define _THREADED_INTERNAL_H
+
+#include "lcms2_threaded.h"
+
+// This plugin requires lcms 2.14 or greater
+#define REQUIRED_LCMS_VERSION 2140
+
+// Unused parameter warning suppression
+#define UNUSED_PARAMETER(x) ((void)x) 
+
+// For testbed
+#define CMSCHECKPOINT CMSAPI
+
+// The specification for "inline" is section 6.7.4 of the C99 standard (ISO/IEC 9899:1999).
+// unfortunately VisualC++ does not conform that
+#if defined(_MSC_VER) || defined(__BORLANDC__)
+#   define cmsINLINE __inline
+#else
+#   define cmsINLINE static inline
+#endif
+
+// Holds all parameters for a threadable transform fragment
+typedef struct {
+
+	struct _cmstransform_struct* CMMcargo;
+
+	const void* InputBuffer;
+	void* OutputBuffer;
+
+	cmsUInt32Number  PixelsPerLine;
+	cmsUInt32Number  LineCount;
+	const cmsStride* Stride;
+
+} _cmsWorkSlice;
+
+// Count the number of threads needed for this job
+cmsUInt32Number _cmsThrCountSlices(struct _cmstransform_struct* CMMcargo, cmsInt32Number MaxWorkers, 
+								   cmsUInt32Number PixelsPerLine, cmsUInt32Number LineCount, 
+								   cmsStride* Stride);
+
+// Split work following several expert rules
+cmsBool		    _cmsThrSplitWork(const _cmsWorkSlice* master, cmsInt32Number nslices, _cmsWorkSlice slices[]);
+
+// Thread primitives
+cmsHANDLE       _cmsThrCreateWorker(cmsContext ContextID, _cmsTransform2Fn worker, _cmsWorkSlice* param);
+void            _cmsThrJoinWorker(cmsContext ContextID, cmsHANDLE hWorker);
+cmsInt32Number  _cmsThrIdealThreadCount(void);
+
+// The scheduler
+void  _cmsThrScheduler(struct _cmstransform_struct* CMMcargo,
+				       const void* InputBuffer,
+				       void* OutputBuffer,
+				       cmsUInt32Number PixelsPerLine,
+				       cmsUInt32Number LineCount,
+				       const cmsStride* Stride);
+#endif
+
+
diff --git a/plugins/threaded/src/threaded_main.c b/plugins/threaded/src/threaded_main.c
new file mode 100644
index 0000000..e11eec6
--- /dev/null
+++ b/plugins/threaded/src/threaded_main.c
@@ -0,0 +1,43 @@
+//---------------------------------------------------------------------------------
+//
+//  Little Color Management System, fast floating point extensions
+//  Copyright (c) 1998-2022 Marti Maria Saguer, all rights reserved
+//
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+//---------------------------------------------------------------------------------
+
+
+#include "threaded_internal.h"
+
+// The Plug-in entry point
+static cmsPluginParalellization Plugin = {
+
+  { cmsPluginMagicNumber, REQUIRED_LCMS_VERSION, cmsPluginParalellizationSig, NULL },
+
+  CMS_THREADED_GUESS_MAX_THREADS,
+  0,
+  _cmsThrScheduler  
+};
+
+// This is the main plug-in installer. 
+void* CMSEXPORT cmsThreadedExtensions(cmsInt32Number max_threads, cmsUInt32Number flags)
+{
+    Plugin.MaxWorkers = max_threads;
+    Plugin.WorkerFlags = flags;
+
+    return (void*)&Plugin;
+}
+
diff --git a/plugins/threaded/src/threaded_scheduler.c b/plugins/threaded/src/threaded_scheduler.c
new file mode 100644
index 0000000..6c54076
--- /dev/null
+++ b/plugins/threaded/src/threaded_scheduler.c
@@ -0,0 +1,108 @@
+//---------------------------------------------------------------------------------
+//
+//  Little Color Management System, multithreaded extensions
+//  Copyright (c) 1998-2022 Marti Maria Saguer, all rights reserved
+//
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+//---------------------------------------------------------------------------------
+
+#include "threaded_internal.h"
+
+// The scheduler is responsible to split the work in several portions in a way that each
+// portion can be calculated by a different thread. All loacking is already done by lcms 
+// mutexes, and memory should not overlap.
+void  _cmsThrScheduler(struct _cmstransform_struct* CMMcargo,
+                       const void* InputBuffer,
+                       void* OutputBuffer,
+                       cmsUInt32Number PixelsPerLine,
+                       cmsUInt32Number LineCount,
+                       const cmsStride* Stride)
+{
+    cmsContext ContextID = cmsGetTransformContextID(CMMcargo);
+    _cmsTransform2Fn worker = _cmsGetTransformWorker(CMMcargo);
+    cmsInt32Number   MaxWorkers = _cmsGetTransformMaxWorkers(CMMcargo);
+
+    // flags are not actually being used
+    // cmsUInt32Number  flags = _cmsGetTransformWorkerFlags(CMMcargo);
+
+    _cmsWorkSlice master;
+    _cmsWorkSlice* slices;
+    cmsStride FixedStride = *Stride;
+    cmsHANDLE* handles;
+
+    //  Count the number of threads needed for this job. MaxWorkers is the upper limit or -1 to auto
+    cmsUInt32Number nSlices = _cmsThrCountSlices(CMMcargo, MaxWorkers, PixelsPerLine, LineCount, &FixedStride);
+    
+    // Abort early if no threaded code
+    if (nSlices <= 1) {
+
+        worker(CMMcargo, InputBuffer, OutputBuffer, PixelsPerLine, LineCount, Stride);
+        return;
+    }
+
+    // Setup master thread
+    master.CMMcargo = CMMcargo;
+    master.InputBuffer = InputBuffer;
+    master.OutputBuffer = OutputBuffer;
+    master.PixelsPerLine = PixelsPerLine;
+    master.LineCount = LineCount;
+    master.Stride = &FixedStride;
+
+    // Create memory for the slices
+    slices  = (_cmsWorkSlice*)_cmsCalloc(ContextID, nSlices, sizeof(_cmsWorkSlice));
+    handles = (cmsHANDLE*) _cmsCalloc(ContextID, nSlices, sizeof(cmsHANDLE));
+
+    if (slices == NULL || handles == NULL)
+    {
+        if (slices)  _cmsFree(ContextID, slices);
+        if (handles) _cmsFree(ContextID, handles);
+
+        // Out of memory in this case only can come from a corruption, but we do the work anyway
+        worker(CMMcargo, InputBuffer, OutputBuffer, PixelsPerLine, LineCount, Stride);
+        return;
+    }
+
+    // All seems ok so far
+    if (_cmsThrSplitWork(&master, nSlices, slices))
+    {
+        // Work is splitted. Create threads
+        cmsUInt32Number i;
+
+        for (i = 1; i < nSlices; i++)
+        {
+            handles[i] = _cmsThrCreateWorker(ContextID, worker, &slices[i]);
+        }
+
+        // Do our portion of work 
+        worker(CMMcargo, slices[0].InputBuffer, slices[0].OutputBuffer, 
+            slices[0].PixelsPerLine, slices[0].LineCount, slices[0].Stride);
+
+        // Wait until all threads are finished
+        for (i = 1; i < nSlices; i++)
+        {
+            _cmsThrJoinWorker(ContextID, handles[i]);
+        }
+    }
+    else
+    {
+        // Not able to split the work, so don't thread
+        worker(CMMcargo, InputBuffer, OutputBuffer, PixelsPerLine, LineCount, Stride);
+    }
+
+    _cmsFree(ContextID, slices);
+    _cmsFree(ContextID, handles);
+}
+
diff --git a/plugins/threaded/src/threaded_split.c b/plugins/threaded/src/threaded_split.c
new file mode 100644
index 0000000..26a2ce2
--- /dev/null
+++ b/plugins/threaded/src/threaded_split.c
@@ -0,0 +1,204 @@
+//---------------------------------------------------------------------------------
+//
+//  Little Color Management System, fast floating point extensions
+//  Copyright (c) 1998-2022 Marti Maria Saguer, all rights reserved
+//
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+//---------------------------------------------------------------------------------
+
+
+#include "threaded_internal.h"
+
+
+// Returns true component size
+cmsINLINE cmsUInt32Number ComponentSize(cmsUInt32Number format)
+{
+    cmsUInt32Number BytesPerComponent = T_BYTES(format);
+
+    // For double, the T_BYTES field is zero
+    if (BytesPerComponent == 0)
+        BytesPerComponent = sizeof(cmsUInt64Number);
+
+    return BytesPerComponent;
+}
+
+// Returns bytes from one pixel to the next
+cmsINLINE cmsUInt32Number PixelSpacing(cmsUInt32Number format)
+{
+    if (T_PLANAR(format))
+        return ComponentSize(format);
+    else
+        return ComponentSize(format) * (T_CHANNELS(format) + T_EXTRA(format));
+}
+
+
+// Memory of block depends of planar or chunky. If lines is 1, then the stride does not contain
+// information and we have to calculate the size. If lines > 1, then we can take line size from stride.
+// if planar, total memory is number of planes per plane stride. If chunky memory is number of lines per
+// line size. If line size is zero, then it should be computed.
+static
+cmsUInt32Number MemSize(cmsUInt32Number format, 
+                        cmsUInt32Number PixelsPerLine, 
+                        cmsUInt32Number LineCount, 
+                        cmsUInt32Number* BytesPerLine,
+                        cmsUInt32Number BytesPerPlane)
+{
+    if (T_PLANAR(format)) {
+
+        if (*BytesPerLine == 0) {
+            
+            *BytesPerLine = ComponentSize(format) * PixelsPerLine;
+        }
+
+        return (T_CHANNELS(format) + T_EXTRA(format)) * BytesPerPlane;
+    }
+    else
+    {
+        if (*BytesPerLine == 0) {
+
+            *BytesPerLine = ComponentSize(format) * (T_CHANNELS(format) + T_EXTRA(format)) * PixelsPerLine;
+        }
+
+        return LineCount * *BytesPerLine;
+    }
+}
+
+// Compute how many workers to use. Repairs Stride if any missing member
+cmsUInt32Number _cmsThrCountSlices(struct _cmstransform_struct* CMMcargo, cmsInt32Number MaxWorkers,
+                                   cmsUInt32Number PixelsPerLine, cmsUInt32Number LineCount, 
+                                   cmsStride* Stride)
+{	    
+    cmsInt32Number MaxInputMem,  MaxOutputMem;
+    cmsInt32Number WorkerCount;
+
+    cmsInt32Number MaxCPUs = _cmsThrIdealThreadCount();
+
+    if (MaxWorkers == CMS_THREADED_GUESS_MAX_THREADS) {
+        MaxWorkers = MaxCPUs;
+    }
+    else
+    {
+        // We allow large number of threads, but this is not going to work well. Warn it. 
+        if (MaxWorkers > MaxCPUs) {
+            cmsSignalError(NULL, cmsERROR_RANGE,
+                "Warning: too many threads for actual processor (CPUs=%s, asked=%d)", MaxCPUs, MaxWorkers);
+        }
+    }
+
+    MaxInputMem = MemSize(cmsGetTransformInputFormat((cmsHTRANSFORM)CMMcargo),
+                         PixelsPerLine, LineCount, &Stride->BytesPerLineIn, Stride->BytesPerPlaneIn);                         
+
+    MaxOutputMem = MemSize(cmsGetTransformOutputFormat((cmsHTRANSFORM)CMMcargo),
+                         PixelsPerLine, LineCount, &Stride->BytesPerLineOut, Stride->BytesPerPlaneOut);
+    
+    // Each thread takes 128K at least
+    WorkerCount = (MaxInputMem + MaxOutputMem) / (128 * 1024);
+
+    if (WorkerCount < 1)
+        WorkerCount = 1;
+    else
+        if (WorkerCount > MaxWorkers)
+            WorkerCount = MaxWorkers;
+
+    return WorkerCount;
+}
+
+// Slice input, output for lines
+static
+void SlicePerLines(const _cmsWorkSlice* master, cmsInt32Number nslices, 
+                            cmsInt32Number LinesPerSlice, _cmsWorkSlice slices[])
+{
+    cmsInt32Number i;
+    cmsInt32Number TotalLines = master ->LineCount;
+
+    for (i = 0; i < nslices; i++) {
+
+        const cmsUInt8Number* PtrInput = master->InputBuffer;
+        cmsUInt8Number* PtrOutput = master->OutputBuffer;
+
+        cmsInt32Number  lines = min(LinesPerSlice, TotalLines);
+
+        memcpy(&slices[i], master, sizeof(_cmsWorkSlice));
+
+        slices[i].InputBuffer  = PtrInput + i * LinesPerSlice * master->Stride->BytesPerLineIn;
+        slices[i].OutputBuffer = PtrOutput + i * LinesPerSlice * master->Stride->BytesPerLineOut;
+
+        slices[i].LineCount = lines;
+        TotalLines -= lines;
+    }
+}
+
+// Per pixels on big blocks of one line
+static
+void SlicePerPixels(const _cmsWorkSlice* master, cmsInt32Number nslices,
+                    cmsInt32Number PixelsPerSlice, _cmsWorkSlice slices[])
+{
+    cmsInt32Number i;
+    cmsInt32Number TotalPixels = master->PixelsPerLine; // As this works on one line only
+
+    cmsUInt32Number PixelSpacingIn = PixelSpacing(cmsGetTransformInputFormat((cmsHTRANSFORM)master->CMMcargo));
+    cmsUInt32Number PixelSpacingOut = PixelSpacing(cmsGetTransformOutputFormat((cmsHTRANSFORM)master->CMMcargo));
+
+    for (i = 0; i < nslices; i++) {
+
+        const cmsUInt8Number* PtrInput = master->InputBuffer;
+        cmsUInt8Number* PtrOutput = master->OutputBuffer;
+
+        cmsInt32Number pixels = min(PixelsPerSlice, TotalPixels);
+
+        memcpy(&slices[i], master, sizeof(_cmsWorkSlice));
+
+        slices[i].InputBuffer = PtrInput + i * PixelsPerSlice * PixelSpacingIn;
+        slices[i].OutputBuffer = PtrOutput + i * PixelsPerSlice * PixelSpacingOut;
+        slices[i].PixelsPerLine = pixels;
+
+        TotalPixels -= pixels;
+    }
+}
+
+
+// If multiline, assign a number of lines to each thread. This works on chunky and planar. Stride parameters 
+// are not changed. In the case of one line, stride chunky is not used and stride planar keeps same.
+cmsBool _cmsThrSplitWork(const _cmsWorkSlice* master, cmsInt32Number nslices, _cmsWorkSlice slices[])
+{
+    
+    // Check parameters
+    if (master->PixelsPerLine == 0 ||
+        master->Stride->BytesPerLineIn == 0 ||
+        master->Stride->BytesPerLineOut == 0) return FALSE;
+
+    // Do the splitting depending on lines
+    if (master->LineCount <= 1) {
+
+        cmsInt32Number PixelsPerWorker = master->PixelsPerLine / nslices;
+
+        if (PixelsPerWorker <= 0) 
+            return FALSE;
+        else
+            SlicePerPixels(master, nslices, PixelsPerWorker, slices);
+    }
+    else {
+        
+        cmsInt32Number LinesPerWorker = master->LineCount / nslices;
+        
+        if (LinesPerWorker <= 0)
+            return FALSE;
+        else
+            SlicePerLines(master, nslices, LinesPerWorker, slices);
+    }
+
+    return TRUE;
+}
\ No newline at end of file
diff --git a/plugins/threaded/testbed/Makefile.am b/plugins/threaded/testbed/Makefile.am
new file mode 100644
index 0000000..8ddd7cd
--- /dev/null
+++ b/plugins/threaded/testbed/Makefile.am
@@ -0,0 +1,23 @@
+#
+# Makefile for building threaded_testbed
+#
+
+# Don't require all the GNU mandated files
+AUTOMAKE_OPTIONS = 1.7 foreign
+
+AM_CPPFLAGS	=  -I$(builddir)/../include -I$(srcdir)/../include -I$(srcdir)/../src \
+                   -I$(top_builddir)/include
+
+check_PROGRAMS = threaded_testbed
+
+threaded_testbed_LDADD =  $(builddir)/../src/liblcms2_threaded.la $(LCMS_LIB_DEPLIBS)
+threaded_testbed_LDFLAGS = -static @LDFLAGS@
+threaded_testbed_SOURCES = threaded_testbed.c
+
+EXTRA_DIST = test0.icc test1.icc test2.icc test3.icc test5.icc
+
+check:
+	if [ "x$(srcdir)" != "x$(builddir)" ]; then \
+		cp $(srcdir)/test?.icc . ; \
+	fi
+	./threaded_testbed
diff --git a/plugins/threaded/testbed/Makefile.in b/plugins/threaded/testbed/Makefile.in
new file mode 100644
index 0000000..eec2fad
--- /dev/null
+++ b/plugins/threaded/testbed/Makefile.in
@@ -0,0 +1,650 @@
+# Makefile.in generated by automake 1.16.3 from Makefile.am.
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+
+# Copyright (C) 1994-2020 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
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+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+#
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+#
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+fast_float_testbed$(EXEEXT): $(fast_float_testbed_OBJECTS) $(fast_float_testbed_DEPENDENCIES) $(EXTRA_fast_float_testbed_DEPENDENCIES) 
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+	-rm -rf .libs _libs
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+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
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+	$(am__define_uniq_tagged_files); \
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+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
+
+CTAGS: ctags
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+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
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+	     $$unique
+
+GTAGS:
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+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
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+	list='$(am__tagged_files)'; \
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+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
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+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
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+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
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+	$(MAKE) $(AM_MAKEFLAGS) $(check_PROGRAMS)
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+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
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+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-checkPROGRAMS clean-generic clean-libtool \
+	mostlyclean-am
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+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/fast_float_testbed.Po
+	-rm -f Makefile
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+	distclean-tags
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+dvi: dvi-am
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+		-rm -f ./$(DEPDIR)/fast_float_testbed.Po
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+	ctags ctags-am distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
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+	tags tags-am uninstall uninstall-am
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+.PRECIOUS: Makefile
+
+
+check:
+	if [ "x$(srcdir)" != "x$(builddir)" ]; then \
+		cp $(srcdir)/test?.icc . ; \
+	fi
+	./fast_float_testbed
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/plugins/threaded/testbed/test0.icc b/plugins/threaded/testbed/test0.icc
new file mode 100644
index 0000000..c233a53
--- /dev/null
+++ b/plugins/threaded/testbed/test0.icc
diff --git a/plugins/threaded/testbed/test1.icc b/plugins/threaded/testbed/test1.icc
new file mode 100644
index 0000000..d0245c8
--- /dev/null
+++ b/plugins/threaded/testbed/test1.icc
diff --git a/plugins/threaded/testbed/test2.icc b/plugins/threaded/testbed/test2.icc
new file mode 100644
index 0000000..73f1b5a
--- /dev/null
+++ b/plugins/threaded/testbed/test2.icc
diff --git a/plugins/threaded/testbed/test3.icc b/plugins/threaded/testbed/test3.icc
new file mode 100644
index 0000000..d0e7930
--- /dev/null
+++ b/plugins/threaded/testbed/test3.icc
diff --git a/plugins/threaded/testbed/test5.icc b/plugins/threaded/testbed/test5.icc
new file mode 100644
index 0000000..34583ab
--- /dev/null
+++ b/plugins/threaded/testbed/test5.icc
diff --git a/plugins/threaded/testbed/threaded_testbed.c b/plugins/threaded/testbed/threaded_testbed.c
new file mode 100644
index 0000000..e148f82
--- /dev/null
+++ b/plugins/threaded/testbed/threaded_testbed.c
@@ -0,0 +1,664 @@
+//---------------------------------------------------------------------------------
+//
+//  Little Color Management System, multithreaded extensions
+//  Copyright (c) 1998-2022 Marti Maria Saguer, all rights reserved
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+//---------------------------------------------------------------------------------
+
+#include "threaded_internal.h"
+
+#include <stdlib.h>
+#include <memory.h>
+
+// A fast way to convert from/to 16 <-> 8 bits
+#define FROM_8_TO_16(rgb) (cmsUInt16Number) ((((cmsUInt16Number) (rgb)) << 8)|(rgb)) 
+#define FROM_16_TO_8(rgb) (cmsUInt8Number) ((((rgb) * 65281 + 8388608) >> 24) & 0xFF)
+
+// Some pixel representations
+typedef struct { cmsUInt8Number  r, g, b;    }  Scanline_rgb8bits;
+typedef struct { cmsUInt8Number  r, g, b, a; }  Scanline_rgba8bits;
+typedef struct { cmsUInt8Number  c, m, y, k; }  Scanline_cmyk8bits;
+typedef struct { cmsUInt16Number r, g, b;    }  Scanline_rgb16bits;
+typedef struct { cmsUInt16Number r, g, b, a; }  Scanline_rgba16bits;
+typedef struct { cmsUInt16Number c, m, y, k; }  Scanline_cmyk16bits;
+
+
+// A flushed printf
+static 
+void trace(const char* frm, ...)
+{
+    va_list args;
+
+    va_start(args, frm);
+    vfprintf(stderr, frm, args);
+    fflush(stderr);
+    va_end(args);
+}
+
+
+// The callback function used by cmsSetLogErrorHandler()
+static
+void FatalErrorQuit(cmsContext ContextID, cmsUInt32Number ErrorCode, const char *Text)
+{
+       UNUSED_PARAMETER(ContextID);
+       UNUSED_PARAMETER(ErrorCode);
+
+       trace("** Fatal error: %s\n", Text);
+       exit(1);
+}
+
+// Rise an error and exit
+static
+void Fail(const char* frm, ...)
+{
+       char ReasonToFailBuffer[1024];
+       va_list args;
+
+       va_start(args, frm);
+       vsprintf(ReasonToFailBuffer, frm, args);
+       FatalErrorQuit(0, 0, ReasonToFailBuffer);
+
+      // unreachable va_end(args);
+}
+
+
+// Creates a fake profile that only has a curve. Used in several places
+static
+cmsHPROFILE CreateCurves(void)
+{
+       cmsToneCurve* Gamma = cmsBuildGamma(0, 1.1);
+       cmsToneCurve* Transfer[3];
+       cmsHPROFILE h;
+
+       Transfer[0] = Transfer[1] = Transfer[2] = Gamma;
+       h = cmsCreateLinearizationDeviceLink(cmsSigRgbData, Transfer);
+
+       cmsFreeToneCurve(Gamma);
+
+       return h;
+}
+
+
+// --------------------------------------------------------------------------------------------------
+// A C C U R A C Y   C H E C K S
+// --------------------------------------------------------------------------------------------------
+
+
+
+// Check change format feature
+static
+void CheckChangeFormat(void)
+{
+    cmsHPROFILE hsRGB, hLab;
+    cmsHTRANSFORM xform;
+    cmsUInt8Number rgb8[3]  = { 10, 120, 40 };
+    cmsUInt16Number rgb16[3] = { 10* 257, 120*257, 40*257 };
+    cmsUInt16Number lab16_1[3], lab16_2[3];
+
+    trace("Checking change format feature...");
+
+    hsRGB = cmsCreate_sRGBProfile();
+    hLab = cmsCreateLab4Profile(NULL);
+
+    xform = cmsCreateTransform(hsRGB, TYPE_RGB_16, hLab, TYPE_Lab_16, INTENT_PERCEPTUAL, 0);
+
+    cmsCloseProfile(hsRGB);
+    cmsCloseProfile(hLab);
+
+    cmsDoTransform(xform, rgb16, lab16_1, 1);
+
+    cmsChangeBuffersFormat(xform, TYPE_RGB_8, TYPE_Lab_16);
+
+    cmsDoTransform(xform, rgb8, lab16_2, 1);
+    cmsDeleteTransform(xform);
+
+    if (memcmp(lab16_1, lab16_2, sizeof(lab16_1)) != 0)
+        Fail("Change format failed!");
+
+    trace("Ok\n");
+
+}
+
+
+// --------------------------------------------------------------------------------------------------
+// P E R F O R M A N C E   C H E C K S
+// --------------------------------------------------------------------------------------------------
+
+
+static 
+cmsFloat64Number MPixSec(cmsFloat64Number diff)
+{
+       cmsFloat64Number seconds = (cmsFloat64Number)diff / (cmsFloat64Number)CLOCKS_PER_SEC;
+       return (256.0 * 256.0 * 256.0) / (1024.0*1024.0*seconds);
+}
+
+typedef cmsFloat64Number(*perf_fn)(cmsContext ct, cmsHPROFILE hlcmsProfileIn, cmsHPROFILE hlcmsProfileOut);
+
+
+static
+void PerformanceHeader(void)
+{
+       trace("                                  MPixel/sec.   MByte/sec.\n");
+}
+
+
+static
+cmsHPROFILE loadProfile(const char* name)
+{
+    if (*name == '*')
+    {
+        if (strcmp(name, "*lab") == 0)
+        {
+            return cmsCreateLab4Profile(NULL);
+        }
+        else
+            if (strcmp(name, "*xyz") == 0)
+            {
+                return cmsCreateXYZProfile();
+            }
+            else
+                if (strcmp(name, "*curves") == 0)
+                {
+                    return CreateCurves();
+                }
+                else
+                    Fail("Unknown builtin '%s'", name);
+
+    }
+    
+    return cmsOpenProfileFromFile(name, "r");
+}
+
+
+static
+cmsFloat64Number Performance(const char* Title, perf_fn fn, cmsContext ct, const char* inICC, const char* outICC, size_t sz, cmsFloat64Number prev)
+{
+       cmsHPROFILE hlcmsProfileIn = loadProfile(inICC);
+       cmsHPROFILE hlcmsProfileOut = loadProfile(outICC);
+                 
+       cmsFloat64Number n = fn(ct, hlcmsProfileIn, hlcmsProfileOut);
+
+       trace("%-30s: ", Title); fflush(stdout);
+       trace("%-12.2f %-12.2f", n, n * sz);
+
+       if (prev > 0.0) {
+
+              cmsFloat64Number imp = n / prev;
+              if (imp > 1)
+                   trace(" (x %-2.1f)",  imp);
+       }
+
+       trace("\n"); fflush(stdout);
+       return n;
+}
+
+
+static
+void ComparativeCt(cmsContext ct1, cmsContext ct2, const char* Title, perf_fn fn1, perf_fn fn2, const char* inICC, const char* outICC)
+{
+       cmsHPROFILE hlcmsProfileIn;
+       cmsHPROFILE hlcmsProfileOut;
+
+       if (inICC == NULL)
+              hlcmsProfileIn = CreateCurves();
+       else
+              hlcmsProfileIn = cmsOpenProfileFromFile(inICC, "r");
+
+       if (outICC == NULL)
+              hlcmsProfileOut = CreateCurves();
+       else
+              hlcmsProfileOut = cmsOpenProfileFromFile(outICC, "r");
+
+
+       cmsFloat64Number n1 = fn1(ct1, hlcmsProfileIn, hlcmsProfileOut);
+
+       if (inICC == NULL)
+              hlcmsProfileIn = CreateCurves();
+       else
+              hlcmsProfileIn = cmsOpenProfileFromFile(inICC, "r");
+
+       if (outICC == NULL)
+              hlcmsProfileOut = CreateCurves();
+       else
+              hlcmsProfileOut = cmsOpenProfileFromFile(outICC, "r");
+
+       cmsFloat64Number n2 = fn2(ct2, hlcmsProfileIn, hlcmsProfileOut);
+
+
+       trace("%-30s: ", Title); fflush(stdout);
+       trace("%-12.2f %-12.2f\n", n1, n2);
+}
+
+static
+void Comparative(const char* Title, perf_fn fn1, perf_fn fn2, const char* inICC, const char* outICC)
+{
+       ComparativeCt(0, 0, Title, fn1, fn2, inICC, outICC);
+}
+
+// The worst case is used, no cache and all rgb combinations
+static
+cmsFloat64Number SpeedTest8bitsRGB(cmsContext ct, cmsHPROFILE hlcmsProfileIn, cmsHPROFILE hlcmsProfileOut)
+{
+       cmsInt32Number r, g, b, j;
+       clock_t atime;
+       cmsFloat64Number diff;
+       cmsHTRANSFORM hlcmsxform;
+       Scanline_rgb8bits *In;
+       cmsUInt32Number Mb;
+
+       if (hlcmsProfileIn == NULL || hlcmsProfileOut == NULL)
+              Fail("Unable to open profiles");
+
+       hlcmsxform = cmsCreateTransformTHR(ct, hlcmsProfileIn, TYPE_RGB_8, hlcmsProfileOut, TYPE_RGB_8, INTENT_PERCEPTUAL, cmsFLAGS_NOCACHE);
+       cmsCloseProfile(hlcmsProfileIn);
+       cmsCloseProfile(hlcmsProfileOut);
+
+       Mb = 256 * 256 * 256 * sizeof(Scanline_rgb8bits);
+       In = (Scanline_rgb8bits*)malloc(Mb);
+
+       j = 0;
+       for (r = 0; r < 256; r++)
+              for (g = 0; g < 256; g++)
+                     for (b = 0; b < 256; b++) {
+
+                            In[j].r = (cmsUInt8Number)r;
+                            In[j].g = (cmsUInt8Number)g;
+                            In[j].b = (cmsUInt8Number)b;
+
+                            j++;
+                     }
+
+       atime = clock();
+
+       cmsDoTransform(hlcmsxform, In, In, 256 * 256 * 256);
+
+       diff = clock() - atime;
+       free(In);
+
+       cmsDeleteTransform(hlcmsxform);
+
+       return MPixSec(diff);
+}
+
+static
+cmsFloat64Number SpeedTest8bitsRGBA(cmsContext ct, cmsHPROFILE hlcmsProfileIn, cmsHPROFILE hlcmsProfileOut)
+{
+       cmsInt32Number r, g, b, j;
+       clock_t atime;
+       cmsFloat64Number diff;
+       cmsHTRANSFORM hlcmsxform;
+       Scanline_rgba8bits *In;
+       cmsUInt32Number Mb;
+
+       if (hlcmsProfileIn == NULL || hlcmsProfileOut == NULL)
+              Fail("Unable to open profiles");
+
+       hlcmsxform = cmsCreateTransformTHR(ct, hlcmsProfileIn, TYPE_RGBA_8, hlcmsProfileOut, TYPE_RGBA_8, INTENT_PERCEPTUAL, cmsFLAGS_NOCACHE);
+       cmsCloseProfile(hlcmsProfileIn);
+       cmsCloseProfile(hlcmsProfileOut);
+
+       Mb = 256 * 256 * 256 * sizeof(Scanline_rgba8bits);
+       In = (Scanline_rgba8bits*)malloc(Mb);
+
+       j = 0;
+       for (r = 0; r < 256; r++)
+              for (g = 0; g < 256; g++)
+                     for (b = 0; b < 256; b++) {
+
+                            In[j].r = (cmsUInt8Number)r;
+                            In[j].g = (cmsUInt8Number)g;
+                            In[j].b = (cmsUInt8Number)b;
+                            In[j].a = 0;
+
+                            j++;
+                     }
+
+       atime = clock();
+
+       cmsDoTransform(hlcmsxform, In, In, 256 * 256 * 256);
+
+       diff = clock() - atime;
+       free(In);
+
+       cmsDeleteTransform(hlcmsxform);
+       return MPixSec(diff);
+
+}
+
+
+// The worst case is used, no cache and all rgb combinations
+static
+cmsFloat64Number SpeedTest16bitsRGB(cmsContext ct, cmsHPROFILE hlcmsProfileIn, cmsHPROFILE hlcmsProfileOut)
+{
+    cmsInt32Number r, g, b, j;
+    clock_t atime;
+    cmsFloat64Number diff;
+    cmsHTRANSFORM hlcmsxform;
+    Scanline_rgb16bits *In;
+    cmsUInt32Number Mb;
+
+    if (hlcmsProfileIn == NULL || hlcmsProfileOut == NULL)
+        Fail("Unable to open profiles");
+
+    hlcmsxform = cmsCreateTransformTHR(ct, hlcmsProfileIn, TYPE_RGB_16, hlcmsProfileOut, TYPE_RGB_16, INTENT_PERCEPTUAL, cmsFLAGS_NOCACHE);
+    cmsCloseProfile(hlcmsProfileIn);
+    cmsCloseProfile(hlcmsProfileOut);
+
+    Mb = 256 * 256 * 256 * sizeof(Scanline_rgb16bits);
+    In = (Scanline_rgb16bits*)malloc(Mb);
+
+    j = 0;
+    for (r = 0; r < 256; r++)
+        for (g = 0; g < 256; g++)
+            for (b = 0; b < 256; b++) {
+
+                In[j].r = (cmsUInt16Number)FROM_8_TO_16(r);
+                In[j].g = (cmsUInt16Number)FROM_8_TO_16(g);
+                In[j].b = (cmsUInt16Number)FROM_8_TO_16(b);
+
+                j++;
+            }
+
+    atime = clock();
+
+    cmsDoTransform(hlcmsxform, In, In, 256 * 256 * 256);
+
+    diff = clock() - atime;
+    free(In);
+
+    cmsDeleteTransform(hlcmsxform);
+
+    return MPixSec(diff);
+}
+
+static
+cmsFloat64Number SpeedTest16bitsCMYK(cmsContext ct, cmsHPROFILE hlcmsProfileIn, cmsHPROFILE hlcmsProfileOut)
+{
+
+    cmsInt32Number r, g, b, j;
+    clock_t atime;
+    cmsFloat64Number diff;
+    cmsHTRANSFORM hlcmsxform;
+    Scanline_cmyk16bits* In;
+    cmsUInt32Number Mb;
+
+    if (hlcmsProfileIn == NULL || hlcmsProfileOut == NULL)
+        Fail("Unable to open profiles");
+
+    hlcmsxform = cmsCreateTransformTHR(ct, hlcmsProfileIn, TYPE_CMYK_16, hlcmsProfileOut, TYPE_CMYK_16, INTENT_PERCEPTUAL, cmsFLAGS_NOCACHE);
+    cmsCloseProfile(hlcmsProfileIn);
+    cmsCloseProfile(hlcmsProfileOut);
+
+    Mb = 256 * 256 * 256 * sizeof(Scanline_cmyk16bits);
+    In = (Scanline_cmyk16bits*)malloc(Mb);
+
+    j = 0;
+    for (r = 0; r < 256; r++)
+        for (g = 0; g < 256; g++)
+            for (b = 0; b < 256; b++) {
+
+                In[j].c = (cmsUInt16Number)r;
+                In[j].m = (cmsUInt16Number)g;
+                In[j].y = (cmsUInt16Number)b;
+                In[j].k = (cmsUInt16Number)r;
+
+                j++;
+            }
+
+    atime = clock();
+
+    cmsDoTransform(hlcmsxform, In, In, 256 * 256 * 256);
+
+    diff = clock() - atime;
+    free(In);
+
+    cmsDeleteTransform(hlcmsxform);
+    return MPixSec(diff);
+}
+
+
+static
+void SpeedTest8(void)
+{
+    cmsContext noPlugin = cmsCreateContext(0, 0);
+
+    cmsFloat64Number t[10];
+
+    trace("\n\n");
+    trace("P E R F O R M A N C E   T E S T S   8 B I T S  (D E F A U L T)\n");
+    trace("==============================================================\n\n");
+    fflush(stdout);
+
+    PerformanceHeader();
+    t[0] = Performance("8 bits on CLUT profiles  ", SpeedTest8bitsRGB, noPlugin, "test5.icc", "test3.icc", sizeof(Scanline_rgb8bits), 0);
+    t[1] = Performance("8 bits on Matrix-Shaper  ", SpeedTest8bitsRGB, noPlugin, "test5.icc", "test0.icc", sizeof(Scanline_rgb8bits), 0);
+    t[2] = Performance("8 bits on same MatrixSh  ", SpeedTest8bitsRGB, noPlugin, "test0.icc", "test0.icc", sizeof(Scanline_rgb8bits), 0);
+    t[3] = Performance("8 bits on curves         ", SpeedTest8bitsRGB, noPlugin, "*curves",   "*curves",   sizeof(Scanline_rgb8bits), 0);
+
+    // Note that context 0 has the plug-in installed
+
+    trace("\n\n");
+    trace("P E R F O R M A N C E   T E S T S  8 B I T S  (P L U G I N)\n");
+    trace("===========================================================\n\n");
+    fflush(stdout);
+
+    PerformanceHeader();
+    Performance("8 bits on CLUT profiles  ", SpeedTest8bitsRGB, 0, "test5.icc", "test3.icc", sizeof(Scanline_rgb8bits), t[0]);
+    Performance("8 bits on Matrix-Shaper  ", SpeedTest8bitsRGB, 0, "test5.icc", "test0.icc", sizeof(Scanline_rgb8bits), t[1]);
+    Performance("8 bits on same MatrixSh  ", SpeedTest8bitsRGB, 0, "test0.icc", "test0.icc", sizeof(Scanline_rgb8bits), t[2]);
+    Performance("8 bits on curves         ", SpeedTest8bitsRGB, 0, "*curves",   "*curves",   sizeof(Scanline_rgb8bits), t[3]);
+
+    cmsDeleteContext(noPlugin);
+}
+
+static
+void SpeedTest16(void)
+{
+    cmsContext noPlugin = cmsCreateContext(0, 0);
+
+    cmsFloat64Number t[10];
+
+    trace("\n\n");
+    trace("P E R F O R M A N C E   T E S T S   1 6  B I T S  (D E F A U L T)\n");
+    trace("=================================================================\n\n");
+    
+    PerformanceHeader();
+    t[0] = Performance("16 bits on CLUT profiles         ", SpeedTest16bitsRGB,  noPlugin, "test5.icc", "test3.icc",  sizeof(Scanline_rgb16bits), 0);
+    t[1] = Performance("16 bits on Matrix-Shaper profiles", SpeedTest16bitsRGB,  noPlugin, "test5.icc", "test0.icc",  sizeof(Scanline_rgb16bits), 0);
+    t[2] = Performance("16 bits on same Matrix-Shaper    ", SpeedTest16bitsRGB,  noPlugin, "test0.icc", "test0.icc",  sizeof(Scanline_rgb16bits), 0);
+    t[3] = Performance("16 bits on curves                ", SpeedTest16bitsRGB,  noPlugin, "*curves",   "*curves",    sizeof(Scanline_rgb16bits), 0);
+    t[4] = Performance("16 bits on CMYK CLUT profiles    ", SpeedTest16bitsCMYK, noPlugin, "test1.icc", "test2.icc",  sizeof(Scanline_cmyk16bits), 0);
+    
+    trace("\n\n");
+    trace("P E R F O R M A N C E   T E S T S   1 6  B I T S  (P L U G I N)\n");
+    trace("===============================================================\n\n");
+
+    PerformanceHeader();
+    Performance("16 bits on CLUT profiles         ", SpeedTest16bitsRGB,  0, "test5.icc", "test3.icc", sizeof(Scanline_rgb16bits), t[0]);
+    Performance("16 bits on Matrix-Shaper profiles", SpeedTest16bitsRGB,  0, "test5.icc", "test0.icc", sizeof(Scanline_rgb16bits), t[1]);
+    Performance("16 bits on same Matrix-Shaper    ", SpeedTest16bitsRGB,  0, "test0.icc", "test0.icc", sizeof(Scanline_rgb16bits), t[2]);
+    Performance("16 bits on curves                ", SpeedTest16bitsRGB,  0, "*curves",   "*curves",   sizeof(Scanline_rgb16bits), t[3]);
+    Performance("16 bits on CMYK CLUT profiles    ", SpeedTest16bitsCMYK, 0, "test1.icc", "test2.icc", sizeof(Scanline_cmyk16bits), t[4]);
+}
+
+
+
+typedef struct
+{
+       Scanline_rgba8bits pixels[256][256];
+       cmsUInt8Number     padding[4];
+
+} padded_line;
+
+typedef struct
+{
+       padded_line line[256];
+} big_bitmap;
+
+
+static
+cmsFloat64Number SpeedTest8bitDoTransform(cmsContext ct, cmsHPROFILE hlcmsProfileIn, cmsHPROFILE hlcmsProfileOut)
+{
+       cmsInt32Number r, g, b, j;
+       clock_t atime;
+       cmsFloat64Number diff;
+       cmsHTRANSFORM hlcmsxform;
+       big_bitmap* In;
+       big_bitmap* Out;
+       cmsUInt32Number Mb;
+
+       if (hlcmsProfileIn == NULL || hlcmsProfileOut == NULL)
+              Fail("Unable to open profiles");
+
+       hlcmsxform = cmsCreateTransformTHR(ct, hlcmsProfileIn, TYPE_RGBA_8, hlcmsProfileOut, TYPE_RGBA_8, INTENT_PERCEPTUAL, cmsFLAGS_NOCACHE);
+       cmsCloseProfile(hlcmsProfileIn);
+       cmsCloseProfile(hlcmsProfileOut);
+
+
+       // Our test bitmap is 256 x 256 padded lines
+       Mb = sizeof(big_bitmap);
+
+       In = (big_bitmap*)malloc(Mb);
+       Out = (big_bitmap*)malloc(Mb);
+
+       for (r = 0; r < 256; r++)
+              for (g = 0; g < 256; g++)
+                     for (b = 0; b < 256; b++) {
+
+                            In->line[r].pixels[g][b].r = (cmsUInt8Number)r;
+                            In->line[r].pixels[g][b].g = (cmsUInt8Number)g;
+                            In->line[r].pixels[g][b].b = (cmsUInt8Number)b;
+                            In->line[r].pixels[g][b].a = 0;
+                     }
+
+       atime = clock();
+
+       for (j = 0; j < 256; j++) {
+
+              cmsDoTransform(hlcmsxform, In->line[j].pixels, Out->line[j].pixels, 256 * 256);
+       }
+
+       diff = clock() - atime;
+       free(In); free(Out);
+
+       cmsDeleteTransform(hlcmsxform);
+       return MPixSec(diff);
+
+}
+
+
+static
+cmsFloat64Number SpeedTest8bitLineStride(cmsContext ct, cmsHPROFILE hlcmsProfileIn, cmsHPROFILE hlcmsProfileOut)
+{
+       cmsInt32Number r, g, b;
+       clock_t atime;
+       cmsFloat64Number diff;
+       cmsHTRANSFORM hlcmsxform;
+       big_bitmap* In;
+       big_bitmap* Out;
+       cmsUInt32Number Mb;
+
+       if (hlcmsProfileIn == NULL || hlcmsProfileOut == NULL)
+              Fail("Unable to open profiles");
+
+       hlcmsxform = cmsCreateTransformTHR(ct, hlcmsProfileIn, TYPE_RGBA_8, hlcmsProfileOut, TYPE_RGBA_8, INTENT_PERCEPTUAL, cmsFLAGS_NOCACHE);
+       cmsCloseProfile(hlcmsProfileIn);
+       cmsCloseProfile(hlcmsProfileOut);
+
+
+       // Our test bitmap is 256 x 256 padded lines
+       Mb = sizeof(big_bitmap);
+
+       In = (big_bitmap*)malloc(Mb);
+       Out = (big_bitmap*)malloc(Mb);
+
+       for (r = 0; r < 256; r++)
+              for (g = 0; g < 256; g++)
+                     for (b = 0; b < 256; b++) {
+
+                            In->line[r].pixels[g][b].r = (cmsUInt8Number)r;
+                            In->line[r].pixels[g][b].g = (cmsUInt8Number)g;
+                            In->line[r].pixels[g][b].b = (cmsUInt8Number)b;
+                            In->line[r].pixels[g][b].a = 0;
+                     }
+
+       atime = clock();
+       
+       cmsDoTransformLineStride(hlcmsxform, In, Out, 256*256, 256, sizeof(padded_line), sizeof(padded_line), 0, 0);
+       
+       diff = clock() - atime;
+       free(In); free(Out);
+
+       cmsDeleteTransform(hlcmsxform);
+       return MPixSec(diff);
+
+}
+
+static
+void ComparativeLineStride8bits(void)
+{
+       cmsContext NoPlugin, Plugin;
+
+       trace("\n\n");
+       trace("C O M P A R A T I V E cmsDoTransform() vs. cmsDoTransformLineStride()\n");
+       trace("                              values given in MegaPixels per second.\n");
+       trace("====================================================================\n");
+
+       fflush(stdout);
+
+       NoPlugin = cmsCreateContext(NULL, NULL);
+       Plugin = cmsCreateContext(cmsThreadedExtensions(CMS_THREADED_GUESS_MAX_THREADS, 0), NULL);
+
+       ComparativeCt(NoPlugin, Plugin, "CLUT profiles  ", SpeedTest8bitDoTransform, SpeedTest8bitLineStride, "test5.icc", "test3.icc");
+       ComparativeCt(NoPlugin, Plugin, "CLUT 16 bits   ", SpeedTest16bitsRGB,       SpeedTest16bitsRGB, "test5.icc", "test3.icc");
+       ComparativeCt(NoPlugin, Plugin, "Matrix-Shaper  ", SpeedTest8bitDoTransform, SpeedTest8bitLineStride, "test5.icc", "test0.icc");
+       ComparativeCt(NoPlugin, Plugin, "same MatrixSh  ", SpeedTest8bitDoTransform, SpeedTest8bitLineStride, "test0.icc", "test0.icc");
+       ComparativeCt(NoPlugin, Plugin, "curves         ", SpeedTest8bitDoTransform, SpeedTest8bitLineStride, NULL, NULL);
+
+       cmsDeleteContext(Plugin);
+       cmsDeleteContext(NoPlugin);
+}
+
+
+
+// The harness test
+int main()
+{
+    trace("Multithreaded extensions testbed - 1.0\n");
+    trace("Copyright (c) 1998-2022 Marti Maria Saguer, all rights reserved\n");
+
+    trace("\nInstalling error logger ... ");
+    cmsSetLogErrorHandler(FatalErrorQuit);
+    trace("done.\n");
+
+    trace("Installing plug-in ... ");
+    cmsPlugin(cmsThreadedExtensions(CMS_THREADED_GUESS_MAX_THREADS, 0));
+    trace("done.\n\n");
+
+    // Change format
+    CheckChangeFormat();
+
+    // Check speed
+    SpeedTest8();
+    SpeedTest16();
+    ComparativeLineStride8bits();
+
+    trace("\nAll tests passed OK\n");
+    return 0;
+}
+
+
+