tdf#114635: reimplement TWAIN-based scan using 32-bit shim on Windows

Since TWAIN is only actually available as 32-bit component on Windows,
to use it in a 64-bit program, we need a 32-bit shim program that does
all actual communication with TWAIN subsystem.

This change reimplements TWAIN implementation to be a separate 32-bit
process. Image is transfered from the shim to main program using file
mapping API.

This reverts most of commit 585d9806961342e95f7318fb947bd31e9f86dee0.
64-bit LibreOffice doesn't bundle TWAIN DSM library now. TWAIN DSM
source code is still used for TWAIN headers.

Change-Id: I46f178ad36acd97a9eff156624b99036fcbb83f8
Reviewed-on: https://gerrit.libreoffice.org/65688
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

8 files changed, 2 insertions, 457 deletions

diff --git a/external/twain_dsm/ExternalPackage_twain_dsm.mk b/external/twain_dsm/ExternalPackage_twain_dsm.mk
deleted file mode 100644
index a2d1bb2ad32e..000000000000
--- a/external/twain_dsm/ExternalPackage_twain_dsm.mk
+++ /dev/null
@@ -1,20 +0,0 @@
-# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
-#
-# This file is part of the LibreOffice project.
-#
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-#
-
-$(eval $(call gb_ExternalPackage_ExternalPackage,twain_dsm,twain_dsm))
-
-$(eval $(call gb_ExternalPackage_use_external_project,twain_dsm,twain_dsm))
-
-ifeq ($(OS),WNT)
-$(eval $(call gb_ExternalPackage_add_file,twain_dsm,$(LIBO_BIN_FOLDER)/TWAINDSM.dll,PCBuild/out/TWAINDSM.dll))
-endif
-
-# headers are not delivered, but used from unpacked dir pub/include/
-
-# vim: set noet sw=4 ts=4:
diff --git a/external/twain_dsm/ExternalProject_twain_dsm.mk b/external/twain_dsm/ExternalProject_twain_dsm.mk
deleted file mode 100644
index f1e2285f7583..000000000000
--- a/external/twain_dsm/ExternalProject_twain_dsm.mk
+++ /dev/null
@@ -1,33 +0,0 @@
-# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
-#
-# This file is part of the LibreOffice project.
-#
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-#
-
-$(eval $(call gb_ExternalProject_ExternalProject,twain_dsm))
-
-$(eval $(call gb_ExternalProject_use_unpacked,twain_dsm,twain_dsm))
-
-$(eval $(call gb_ExternalProject_register_targets,twain_dsm,\
-	build \
-))
-
-ifeq ($(OS),WNT)
-
-$(call gb_ExternalProject_get_state_target,twain_dsm,build) :
-	$(call gb_ExternalProject_run,build,\
-		MSBuild.exe visual_studio/TWAIN_DSM_VS2015.sln /t:Build \
-			/p:Configuration=$(if $(MSVC_USE_DEBUG_RUNTIME),Debug,Release) \
-			/p:Platform=$(if $(filter INTEL,$(CPUNAME)),Win32,x64) \
-			/p:OutDir=../PCBuild/out/ /p:IntDir=../PCBuild/obj/ \
-			$(if $(filter 140,$(VCVER)),/p:PlatformToolset=v140 /p:VisualStudioVersion=14.0 /ToolsVersion:14.0) \
-			$(if $(filter 150,$(VCVER)),/p:PlatformToolset=v141 /p:VisualStudioVersion=15.0 /ToolsVersion:15.0) \
-			$(if $(filter 150-10,$(VCVER)-$(WINDOWS_SDK_VERSION)),/p:WindowsTargetPlatformVersion=$(UCRTVERSION)) \
-	)
-
-endif
-
-# vim: set noet sw=4 ts=4:
diff --git a/external/twain_dsm/Module_twain_dsm.mk b/external/twain_dsm/Module_twain_dsm.mk
index 10db9b9a4dac..bbaedb77b5d0 100644
--- a/external/twain_dsm/Module_twain_dsm.mk
+++ b/external/twain_dsm/Module_twain_dsm.mk
@@ -10,15 +10,11 @@
 $(eval $(call gb_Module_Module,twain_dsm))
 
 ifeq ($(OS),WNT)
-
+ifeq ($(BUILD_X86),TRUE)
 $(eval $(call gb_Module_add_targets,twain_dsm,\
     UnpackedTarball_twain_dsm \
-    $(if $(filter X86_64,$(CPUNAME)), \
-        ExternalProject_twain_dsm \
-        ExternalPackage_twain_dsm \
-    ) \
 ))
-
+endif
 endif
 
 # vim: set noet sw=4 ts=4:
diff --git a/external/twain_dsm/TWAIN_DSM_VS2015.vcxproj.filters.patch b/external/twain_dsm/TWAIN_DSM_VS2015.vcxproj.filters.patch
deleted file mode 100644
index e73ae63dc855..000000000000
--- a/external/twain_dsm/TWAIN_DSM_VS2015.vcxproj.filters.patch
+++ /dev/null
@@ -1,54 +0,0 @@
-diff --git a/visual_studio/TWAIN_DSM_VS2015.vcxproj.filters b/visual_studio/TWAIN_DSM_VS2015.vcxproj.filters
-new file mode 100755
-index 000000000000..a17a30d0097f
---- /dev/null
-+++ b/visual_studio/TWAIN_DSM_VS2015.vcxproj.filters
-@@ -0,0 +1,47 @@
-+<?xml version="1.0" encoding="utf-8"?>
-+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-+  <ItemGroup>
-+    <Filter Include="Source Files">
-+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
-+      <Extensions>cpp;c;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
-+    </Filter>
-+    <Filter Include="Header Files">
-+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
-+      <Extensions>h;hpp;hxx;hm;inl;inc;xsd</Extensions>
-+    </Filter>
-+    <Filter Include="Resource Files">
-+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
-+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx</Extensions>
-+    </Filter>
-+  </ItemGroup>
-+  <ItemGroup>
-+    <ClCompile Include="..\src\apps.cpp">
-+      <Filter>Source Files</Filter>
-+    </ClCompile>
-+    <ClCompile Include="..\src\dsm.cpp">
-+      <Filter>Source Files</Filter>
-+    </ClCompile>
-+    <ClCompile Include="..\src\hook.cpp">
-+      <Filter>Source Files</Filter>
-+    </ClCompile>
-+    <ClCompile Include="..\src\log.cpp">
-+      <Filter>Source Files</Filter>
-+    </ClCompile>
-+  </ItemGroup>
-+  <ItemGroup>
-+    <ClInclude Include="..\src\dsm.h">
-+      <Filter>Header Files</Filter>
-+    </ClInclude>
-+    <ClInclude Include="..\src\resource.h">
-+      <Filter>Header Files</Filter>
-+    </ClInclude>
-+    <ClInclude Include="..\src\twain.h">
-+      <Filter>Header Files</Filter>
-+    </ClInclude>
-+  </ItemGroup>
-+  <ItemGroup>
-+    <ResourceCompile Include="..\src\dsm.rc">
-+      <Filter>Resource Files</Filter>
-+    </ResourceCompile>
-+  </ItemGroup>
-+</Project>
-\ No newline at end of file
diff --git a/external/twain_dsm/TWAIN_DSM_VS2015.vcxproj.patch b/external/twain_dsm/TWAIN_DSM_VS2015.vcxproj.patch
deleted file mode 100644
index 40e131d2ad71..000000000000
--- a/external/twain_dsm/TWAIN_DSM_VS2015.vcxproj.patch
+++ /dev/null
@@ -1,265 +0,0 @@
-diff --git a/visual_studio/TWAIN_DSM_VS2015.vcxproj b/visual_studio/TWAIN_DSM_VS2015.vcxproj
-new file mode 100755
-index 000000000000..425c39966171
---- /dev/null
-+++ b/visual_studio/TWAIN_DSM_VS2015.vcxproj
-@@ -0,0 +1,258 @@
-+<?xml version="1.0" encoding="utf-8"?>
-+<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-+  <ItemGroup Label="ProjectConfigurations">
-+    <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|Win32">
-+      <Configuration>Release</Configuration>
-+      <Platform>Win32</Platform>
-+    </ProjectConfiguration>
-+    <ProjectConfiguration Include="Release|x64">
-+      <Configuration>Release</Configuration>
-+      <Platform>x64</Platform>
-+    </ProjectConfiguration>
-+  </ItemGroup>
-+  <PropertyGroup Label="Globals">
-+    <ProjectGuid>{5F73EBC7-6A0E-4CBF-A37C-CB167E4CC379}</ProjectGuid>
-+    <RootNamespace>TWAINDSM</RootNamespace>
-+    <Keyword>Win32Proj</Keyword>
-+    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
-+  </PropertyGroup>
-+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
-+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
-+    <ConfigurationType>DynamicLibrary</ConfigurationType>
-+    <CharacterSet>MultiByte</CharacterSet>
-+    <PlatformToolset>v140</PlatformToolset>
-+  </PropertyGroup>
-+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
-+    <ConfigurationType>DynamicLibrary</ConfigurationType>
-+    <CharacterSet>MultiByte</CharacterSet>
-+    <PlatformToolset>v140</PlatformToolset>
-+  </PropertyGroup>
-+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
-+    <ConfigurationType>DynamicLibrary</ConfigurationType>
-+    <CharacterSet>MultiByte</CharacterSet>
-+    <PlatformToolset>v140</PlatformToolset>
-+  </PropertyGroup>
-+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
-+    <ConfigurationType>DynamicLibrary</ConfigurationType>
-+    <CharacterSet>MultiByte</CharacterSet>
-+    <PlatformToolset>v140</PlatformToolset>
-+  </PropertyGroup>
-+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
-+  <ImportGroup Label="ExtensionSettings">
-+  </ImportGroup>
-+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" 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|Win32'" 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>
-+  <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>
-+  <PropertyGroup Label="UserMacros" />
-+  <PropertyGroup>
-+    <_ProjectFileVersion>10.0.40219.1</_ProjectFileVersion>
-+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(Configuration)15_32\</OutDir>
-+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(Configuration)15_32\</IntDir>
-+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">false</LinkIncremental>
-+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">$(Configuration)15_64\</OutDir>
-+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">$(Configuration)15_64\</IntDir>
-+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" />
-+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">$(Configuration)15_32\</OutDir>
-+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">$(Configuration)15_32\</IntDir>
-+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">false</LinkIncremental>
-+    <OutDir Condition="'$(Configuration)|$(Platform)'=='Release|x64'">$(Configuration)15_64\</OutDir>
-+    <IntDir Condition="'$(Configuration)|$(Platform)'=='Release|x64'">$(Configuration)15_64\</IntDir>
-+    <LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</LinkIncremental>
-+    <CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">AllRules.ruleset</CodeAnalysisRuleSet>
-+    <CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" />
-+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" />
-+    <CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">AllRules.ruleset</CodeAnalysisRuleSet>
-+    <CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" />
-+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" />
-+    <CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">AllRules.ruleset</CodeAnalysisRuleSet>
-+    <CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" />
-+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" />
-+    <CodeAnalysisRuleSet Condition="'$(Configuration)|$(Platform)'=='Release|x64'">AllRules.ruleset</CodeAnalysisRuleSet>
-+    <CodeAnalysisRules Condition="'$(Configuration)|$(Platform)'=='Release|x64'" />
-+    <CodeAnalysisRuleAssemblies Condition="'$(Configuration)|$(Platform)'=='Release|x64'" />
-+  </PropertyGroup>
-+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-+    <TargetName>TWAINDSM</TargetName>
-+  </PropertyGroup>
-+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-+    <TargetName>TWAINDSM</TargetName>
-+  </PropertyGroup>
-+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-+    <TargetName>TWAINDSM</TargetName>
-+  </PropertyGroup>
-+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-+    <TargetName>TWAINDSM</TargetName>
-+  </PropertyGroup>
-+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-+    <PreBuildEvent>
-+      <Message>create pub folders if do not exist</Message>
-+      <Command>
-+      </Command>
-+    </PreBuildEvent>
-+    <ClCompile>
-+      <Optimization>Disabled</Optimization>
-+      <AdditionalIncludeDirectories>.;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-+      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;TWAIN_DSM_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-+      <MinimalRebuild>true</MinimalRebuild>
-+      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
-+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
-+      <PrecompiledHeader>
-+      </PrecompiledHeader>
-+      <WarningLevel>Level4</WarningLevel>
-+      <TreatWarningAsError>false</TreatWarningAsError>
-+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-+    </ClCompile>
-+    <Link>
-+      <OutputFile>$(OutDir)TWAINDSM.dll</OutputFile>
-+      <SuppressStartupBanner>true</SuppressStartupBanner>
-+      <AdditionalLibraryDirectories>..\..\pub\external\lib;..\..\pub\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-+      <ModuleDefinitionFile>..\src\dsm.def</ModuleDefinitionFile>
-+      <GenerateDebugInformation>true</GenerateDebugInformation>
-+      <ProgramDatabaseFile>$(OutDir)TWAINDSM.pdb</ProgramDatabaseFile>
-+      <SubSystem>Windows</SubSystem>
-+      <RandomizedBaseAddress>true</RandomizedBaseAddress>
-+      <DataExecutionPrevention>true</DataExecutionPrevention>
-+      <ImportLibrary>$(OutDir)TWAINDSM.lib</ImportLibrary>
-+      <TargetMachine>MachineX86</TargetMachine>
-+    </Link>
-+  </ItemDefinitionGroup>
-+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
-+    <PreBuildEvent>
-+      <Message>create pub folders if do not exist</Message>
-+      <Command>
-+      </Command>
-+    </PreBuildEvent>
-+    <Midl>
-+      <TargetEnvironment>X64</TargetEnvironment>
-+    </Midl>
-+    <ClCompile>
-+      <Optimization>Disabled</Optimization>
-+      <AdditionalIncludeDirectories>.;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-+      <PreprocessorDefinitions>_DEBUG;_WINDOWS;_USRDLL;TWAIN_DSM_EXPORTS;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-+      <MinimalRebuild>true</MinimalRebuild>
-+      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
-+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
-+      <PrecompiledHeader>
-+      </PrecompiledHeader>
-+      <WarningLevel>Level4</WarningLevel>
-+      <TreatWarningAsError>false</TreatWarningAsError>
-+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-+    </ClCompile>
-+    <ResourceCompile>
-+      <PreprocessorDefinitions>_VC80_UPGRADE=0x0710;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-+    </ResourceCompile>
-+    <Link>
-+      <OutputFile>$(ProjectDir)\$(OutDir)TWAINDSM.dll</OutputFile>
-+      <SuppressStartupBanner>true</SuppressStartupBanner>
-+      <AdditionalLibraryDirectories>..\..\pub\external\lib;..\..\pub\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-+      <ModuleDefinitionFile>..\src\dsm.def</ModuleDefinitionFile>
-+      <GenerateDebugInformation>true</GenerateDebugInformation>
-+      <ProgramDatabaseFile>$(OutDir)TWAINDSM.pdb</ProgramDatabaseFile>
-+      <SubSystem>Windows</SubSystem>
-+      <RandomizedBaseAddress>true</RandomizedBaseAddress>
-+      <DataExecutionPrevention>true</DataExecutionPrevention>
-+      <ImportLibrary>$(OutDir)TWAINDSM.lib</ImportLibrary>
-+      <TargetMachine>MachineX64</TargetMachine>
-+    </Link>
-+  </ItemDefinitionGroup>
-+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
-+    <PreBuildEvent>
-+      <Message>create pub folders if do not exist</Message>
-+      <Command>
-+      </Command>
-+    </PreBuildEvent>
-+    <ClCompile>
-+      <AdditionalIncludeDirectories>.;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-+      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;TWAIN_DSM_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
-+      <PrecompiledHeader>
-+      </PrecompiledHeader>
-+      <WarningLevel>Level3</WarningLevel>
-+      <TreatWarningAsError>false</TreatWarningAsError>
-+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-+    </ClCompile>
-+    <Link>
-+      <OutputFile>$(OutDir)TWAINDSM.dll</OutputFile>
-+      <AdditionalLibraryDirectories>..\..\pub\external\lib;..\..\pub\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-+      <ModuleDefinitionFile>..\src\dsm.def</ModuleDefinitionFile>
-+      <GenerateDebugInformation>true</GenerateDebugInformation>
-+      <SubSystem>Windows</SubSystem>
-+      <OptimizeReferences>true</OptimizeReferences>
-+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-+      <RandomizedBaseAddress>true</RandomizedBaseAddress>
-+      <DataExecutionPrevention>true</DataExecutionPrevention>
-+      <ImportLibrary>$(OutDir)TWAINDSM.lib</ImportLibrary>
-+      <TargetMachine>MachineX86</TargetMachine>
-+    </Link>
-+  </ItemDefinitionGroup>
-+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
-+    <PreBuildEvent>
-+      <Message>create pub folders if do not exist</Message>
-+      <Command>
-+      </Command>
-+    </PreBuildEvent>
-+    <Midl>
-+      <TargetEnvironment>X64</TargetEnvironment>
-+    </Midl>
-+    <ClCompile>
-+      <AdditionalIncludeDirectories>.;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-+      <PreprocessorDefinitions>NDEBUG;_WINDOWS;_USRDLL;TWAIN_DSM_EXPORTS;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
-+      <PrecompiledHeader>
-+      </PrecompiledHeader>
-+      <WarningLevel>Level3</WarningLevel>
-+      <TreatWarningAsError>false</TreatWarningAsError>
-+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-+    </ClCompile>
-+    <ResourceCompile>
-+      <PreprocessorDefinitions>_VC80_UPGRADE=0x0710;WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-+    </ResourceCompile>
-+    <Link>
-+      <OutputFile>$(ProjectDir)\$(OutDir)TWAINDSM.dll</OutputFile>
-+      <AdditionalLibraryDirectories>..\..\pub\external\lib;..\..\pub\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
-+      <ModuleDefinitionFile>..\src\dsm.def</ModuleDefinitionFile>
-+      <GenerateDebugInformation>true</GenerateDebugInformation>
-+      <SubSystem>Windows</SubSystem>
-+      <OptimizeReferences>true</OptimizeReferences>
-+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
-+      <RandomizedBaseAddress>true</RandomizedBaseAddress>
-+      <DataExecutionPrevention>true</DataExecutionPrevention>
-+      <ImportLibrary>$(OutDir)TWAINDSM.lib</ImportLibrary>
-+      <TargetMachine>MachineX64</TargetMachine>
-+    </Link>
-+  </ItemDefinitionGroup>
-+  <ItemGroup>
-+    <ClCompile Include="..\src\apps.cpp" />
-+    <ClCompile Include="..\src\dsm.cpp" />
-+    <ClCompile Include="..\src\hook.cpp" />
-+    <ClCompile Include="..\src\log.cpp" />
-+  </ItemGroup>
-+  <ItemGroup>
-+    <ClInclude Include="..\src\dsm.h" />
-+    <ClInclude Include="..\src\resource.h" />
-+    <ClInclude Include="..\src\twain.h" />
-+  </ItemGroup>
-+  <ItemGroup>
-+    <ResourceCompile Include="..\src\dsm.rc" />
-+  </ItemGroup>
-+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
-+  <ImportGroup Label="ExtensionTargets">
-+  </ImportGroup>
-+</Project>
-\ No newline at end of file
diff --git a/external/twain_dsm/UnpackedTarball_twain_dsm.mk b/external/twain_dsm/UnpackedTarball_twain_dsm.mk
index ac0c3ce7c8c6..11be31e9eb81 100644
--- a/external/twain_dsm/UnpackedTarball_twain_dsm.mk
+++ b/external/twain_dsm/UnpackedTarball_twain_dsm.mk
@@ -11,13 +11,4 @@ $(eval $(call gb_UnpackedTarball_UnpackedTarball,twain_dsm))
 
 $(eval $(call gb_UnpackedTarball_set_tarball,twain_dsm,$(TWAIN_DSM_TARBALL)))
 
-$(eval $(call gb_UnpackedTarball_set_patchlevel,twain_dsm,1))
-
-$(eval $(call gb_UnpackedTarball_add_patches,twain_dsm, \
-    external/twain_dsm/TWAIN_DSM_VS2015.vcxproj.patch \
-    external/twain_dsm/TWAIN_DSM_VS2015.vcxproj.filters.patch \
-    external/twain_dsm/fix-non-us-ascii-chars-part1.patch \
-    external/twain_dsm/fix-non-us-ascii-chars-part2.patch \
-))
-
 # vim: set noet sw=4 ts=4:
diff --git a/external/twain_dsm/fix-non-us-ascii-chars-part1.patch b/external/twain_dsm/fix-non-us-ascii-chars-part1.patch
deleted file mode 100644
index 0fb29dee45ce..000000000000
--- a/external/twain_dsm/fix-non-us-ascii-chars-part1.patch
+++ /dev/null
@@ -1,26 +0,0 @@
-diff --git a/src/apps.cpp b/src/apps.cpp
-index 54c6347573fa..45d169d5b148 100755
---- a/src/apps.cpp
-+++ b/src/apps.cpp
-@@ -1,7 +1,7 @@
- /***************************************************************************
-  * TWAIN Data Source Manager version 2.1
-  * Manages image acquisition data sources used by a machine. 
-- * Copyright � 2007 TWAIN Working Group:  
-+ * Copyright (C) 2007 TWAIN Working Group:  
-  * Adobe Systems Incorporated,AnyDoc Software Inc., Eastman Kodak Company, 
-  * Fujitsu Computer Products of America, JFL Peripheral Solutions Inc., 
-  * Ricoh Corporation, and Xerox Corporation.
-diff --git a/src/log.cpp b/src/log.cpp
-index 496e9d9c52a1..3b05307981ad 100755
---- a/src/log.cpp
-+++ b/src/log.cpp
-@@ -1,7 +1,7 @@
- /***************************************************************************
-  * TWAIN Data Source Manager version 2.1
-  * Manages image acquisition data sources used by a machine. 
-- * Copyright � 2007 TWAIN Working Group:  
-+ * Copyright (C) 2007 TWAIN Working Group:  
-  * Adobe Systems Incorporated,AnyDoc Software Inc., Eastman Kodak Company, 
-  * Fujitsu Computer Products of America, JFL Peripheral Solutions Inc., 
-  * Ricoh Corporation, and Xerox Corporation.
diff --git a/external/twain_dsm/fix-non-us-ascii-chars-part2.patch b/external/twain_dsm/fix-non-us-ascii-chars-part2.patch
deleted file mode 100644
index 29e78bf00faf..000000000000
--- a/external/twain_dsm/fix-non-us-ascii-chars-part2.patch
+++ /dev/null
@@ -1,44 +0,0 @@
-diff --git a/src/dsm.cpp b/src/dsm.cpp
-index 1b74285c5d72..efd8f443ca02 100755
---- a/src/dsm.cpp
-+++ b/src/dsm.cpp
-@@ -1,7 +1,7 @@
- /***************************************************************************
-  * TWAIN Data Source Manager version 2.1
-  * Manages image acquisition data sources used by a machine. 
-- * Copyright © 2007 TWAIN Working Group:  
-+ * Copyright (C) 2007 TWAIN Working Group:  
-  * Adobe Systems Incorporated,AnyDoc Software Inc., Eastman Kodak Company, 
-  * Fujitsu Computer Products of America, JFL Peripheral Solutions Inc., 
-  * Ricoh Corporation, and Xerox Corporation.
-@@ -38,7 +38,7 @@
- /*! \mainpage Data Source Manager
-  *
-  * The Source Manager provides the communication path between the 
-- * Application and the Source, supports the user’s selection of a  
-+ * Application and the Source, supports the user's selection of a  
-  * Source, and loads the Source for access by the Application.   
-  * Communications from Application to Source Manager or the Source
-  * to Source Manager (via DAT_NULL) arrive in exclusively through
-@@ -51,7 +51,7 @@
-  *
-  *
-  *
-- * Copyright © 2007 TWAIN Working Group:  Adobe Systems Incorporated,
-+ * Copyright (C) 2007 TWAIN Working Group:  Adobe Systems Incorporated,
-  * AnyDoc Software Inc., Eastman Kodak Company, 
-  * Fujitsu Computer Products of America, JFL Peripheral Solutions Inc., 
-  * Ricoh Corporation, and Xerox Corporation.
-diff --git a/src/dsm.h b/src/dsm.h
-index f7afb316d3de..c156d3843a9e 100755
---- a/src/dsm.h
-+++ b/src/dsm.h
-@@ -1,7 +1,7 @@
- /***************************************************************************
-  * TWAIN Data Source Manager version 2.1
-  * Manages image acquisition data sources used by a machine. 
-- * Copyright © 2007 TWAIN Working Group:
-+ * Copyright (C) 2007 TWAIN Working Group:
-  * Adobe Systems Incorporated,AnyDoc Software Inc., Eastman Kodak Company, 
-  * Fujitsu Computer Products of America, JFL Peripheral Solutions Inc., 
-  * Ricoh Corporation, and Xerox Corporation.