Adding upstream version 2.10.34.upstream/2.10.34upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

59 files changed, 15324 insertions, 0 deletions

diff --git a/app/plug-in/Makefile.am b/app/plug-in/Makefile.am
new file mode 100644
index 0000000..852fdbb
--- /dev/null
+++ b/app/plug-in/Makefile.am
@@ -0,0 +1,106 @@
+## Process this file with automake to produce Makefile.in
+
+AM_CPPFLAGS = \
+	-DG_LOG_DOMAIN=\"Gimp-Plug-In\"	\
+	-I$(top_builddir)		\
+	-I$(top_srcdir)			\
+	-I$(top_builddir)/app		\
+	-I$(top_srcdir)/app		\
+	$(CAIRO_CFLAGS)			\
+	$(GEGL_CFLAGS)			\
+	$(GDK_PIXBUF_CFLAGS)		\
+	-I$(includedir)
+
+noinst_LIBRARIES = libappplug-in.a
+
+libappplug_in_a_SOURCES = \
+	plug-in-enums.c 			\
+	plug-in-enums.h 			\
+	plug-in-types.h 			\
+	\
+	gimpenvirontable.c			\
+	gimpenvirontable.h			\
+	gimpinterpreterdb.c			\
+	gimpinterpreterdb.h			\
+	gimpplugindebug.c			\
+	gimpplugindebug.h			\
+	gimpplugin.c				\
+	gimpplugin.h				\
+	gimpplugin-cleanup.c			\
+	gimpplugin-cleanup.h			\
+	gimpplugin-context.c			\
+	gimpplugin-context.h			\
+	gimpplugin-message.c			\
+	gimpplugin-message.h			\
+	gimpplugin-progress.c			\
+	gimpplugin-progress.h			\
+	gimpplugindef.c				\
+	gimpplugindef.h				\
+	gimppluginerror.c 			\
+	gimppluginerror.h 			\
+	gimppluginmanager.c			\
+	gimppluginmanager.h			\
+	gimppluginmanager-call.c		\
+	gimppluginmanager-call.h		\
+	gimppluginmanager-data.c		\
+	gimppluginmanager-data.h		\
+	gimppluginmanager-file.c		\
+	gimppluginmanager-file.h		\
+	gimppluginmanager-file-procedure.c	\
+	gimppluginmanager-file-procedure.h	\
+	gimppluginmanager-help-domain.c		\
+	gimppluginmanager-help-domain.h		\
+	gimppluginmanager-locale-domain.c	\
+	gimppluginmanager-locale-domain.h	\
+	gimppluginmanager-menu-branch.c		\
+	gimppluginmanager-menu-branch.h		\
+	gimppluginmanager-query.c		\
+	gimppluginmanager-query.h		\
+	gimppluginmanager-restore.c		\
+	gimppluginmanager-restore.h		\
+	gimppluginprocedure.c			\
+	gimppluginprocedure.h			\
+	gimppluginprocframe.c			\
+	gimppluginprocframe.h			\
+	gimppluginshm.c				\
+	gimppluginshm.h				\
+	gimptemporaryprocedure.c		\
+	gimptemporaryprocedure.h		\
+	\
+	plug-in-menu-path.c			\
+	plug-in-menu-path.h			\
+	plug-in-params.c			\
+	plug-in-params.h			\
+	plug-in-rc.c				\
+	plug-in-rc.h
+
+#
+# rules to generate built sources
+#
+# setup autogeneration dependencies
+gen_sources = xgen-pec
+CLEANFILES = $(EXTRA_PROGRAMS) $(gen_sources)
+
+xgen-pec: $(srcdir)/plug-in-enums.h $(GIMP_MKENUMS) Makefile.am
+	$(AM_V_GEN) $(GIMP_MKENUMS) \
+		--fhead "#include \"config.h\"\n#include <gio/gio.h>\n#include \"libgimpbase/gimpbase.h\"\n#include \"plug-in-enums.h\"\n#include \"gimp-intl.h\"" \
+		--fprod "\n/* enumerations from \"@basename@\" */" \
+		--vhead "GType\n@enum_name@_get_type (void)\n{\n  static const G@Type@Value values[] =\n  {" \
+		--vprod "    { @VALUENAME@, \"@VALUENAME@\", \"@valuenick@\" }," \
+		--vtail "    { 0, NULL, NULL }\n  };\n" \
+		--dhead "  static const Gimp@Type@Desc descs[] =\n  {" \
+		--dprod "    { @VALUENAME@, @valuedesc@, @valuehelp@ },@if ('@valueabbrev@' ne 'NULL')@\n    /* Translators: this is an abbreviated version of @valueudesc@.\n       Keep it short. */\n    { @VALUENAME@, @valueabbrev@, NULL },@endif@" \
+		--dtail "    { 0, NULL, NULL }\n  };\n\n  static GType type = 0;\n\n  if (G_UNLIKELY (! type))\n    {\n      type = g_@type@_register_static (\"@EnumName@\", values);\n      gimp_type_set_translation_context (type, \"@enumnick@\");\n      gimp_@type@_set_value_descriptions (type, descs);\n    }\n\n  return type;\n}\n" \
+		$< > $@
+
+# copy the generated enum file back to the source directory only if it's
+# changed; otherwise, only update its timestamp, so that the recipe isn't
+# executed again on the next build, however, allow this to (harmlessly) fail,
+# to support building from a read-only source tree.
+$(srcdir)/plug-in-enums.c: xgen-pec
+	$(AM_V_GEN) if ! cmp -s $< $@; then \
+		cp $< $@; \
+	else \
+		touch $@ 2> /dev/null \
+		|| true; \
+	fi
diff --git a/app/plug-in/Makefile.in b/app/plug-in/Makefile.in
new file mode 100644
index 0000000..85dd1c2
--- /dev/null
+++ b/app/plug-in/Makefile.in
@@ -0,0 +1,1126 @@
+# Makefile.in generated by automake 1.16.3 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2020 Free Software Foundation, Inc.
+
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+am__is_gnu_make = { \
+  if test -z '$(MAKELEVEL)'; then \
+    false; \
+  elif test -n '$(MAKE_HOST)'; then \
+    true; \
+  elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
+    true; \
+  else \
+    false; \
+  fi; \
+}
+am__make_running_with_option = \
+  case $${target_option-} in \
+      ?) ;; \
+      *) echo "am__make_running_with_option: internal error: invalid" \
+              "target option '$${target_option-}' specified" >&2; \
+         exit 1;; \
+  esac; \
+  has_opt=no; \
+  sane_makeflags=$$MAKEFLAGS; \
+  if $(am__is_gnu_make); then \
+    sane_makeflags=$$MFLAGS; \
+  else \
+    case $$MAKEFLAGS in \
+      *\\[\ \	]*) \
+        bs=\\; \
+        sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \
+          | sed "s/$$bs$$bs[$$bs $$bs	]*//g"`;; \
+    esac; \
+  fi; \
+  skip_next=no; \
+  strip_trailopt () \
+  { \
+    flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \
+  }; \
+  for flg in $$sane_makeflags; do \
+    test $$skip_next = yes && { skip_next=no; continue; }; \
+    case $$flg in \
+      *=*|--*) continue;; \
+        -*I) strip_trailopt 'I'; skip_next=yes;; \
+      -*I?*) strip_trailopt 'I';; \
+        -*O) strip_trailopt 'O'; skip_next=yes;; \
+      -*O?*) strip_trailopt 'O';; \
+        -*l) strip_trailopt 'l'; skip_next=yes;; \
+      -*l?*) strip_trailopt 'l';; \
+      -[dEDm]) skip_next=yes;; \
+      -[JT]) skip_next=yes;; \
+    esac; \
+    case $$flg in \
+      *$$target_option*) has_opt=yes; break;; \
+    esac; \
+  done; \
+  test $$has_opt = yes
+am__make_dryrun = (target_option=n; $(am__make_running_with_option))
+am__make_keepgoing = (target_option=k; $(am__make_running_with_option))
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+subdir = app/plug-in
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/acinclude.m4 \
+	$(top_srcdir)/m4macros/alsa.m4 \
+	$(top_srcdir)/m4macros/ax_compare_version.m4 \
+	$(top_srcdir)/m4macros/ax_cxx_compile_stdcxx.m4 \
+	$(top_srcdir)/m4macros/ax_gcc_func_attribute.m4 \
+	$(top_srcdir)/m4macros/ax_prog_cc_for_build.m4 \
+	$(top_srcdir)/m4macros/ax_prog_perl_version.m4 \
+	$(top_srcdir)/m4macros/detectcflags.m4 \
+	$(top_srcdir)/m4macros/pythondev.m4 $(top_srcdir)/configure.ac
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+DIST_COMMON = $(srcdir)/Makefile.am $(am__DIST_COMMON)
+mkinstalldirs = $(install_sh) -d
+CONFIG_HEADER = $(top_builddir)/config.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+LIBRARIES = $(noinst_LIBRARIES)
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+AM_V_AR = $(am__v_AR_@AM_V@)
+am__v_AR_ = $(am__v_AR_@AM_DEFAULT_V@)
+am__v_AR_0 = @echo "  AR      " $@;
+am__v_AR_1 = 
+libappplug_in_a_AR = $(AR) $(ARFLAGS)
+libappplug_in_a_LIBADD =
+am_libappplug_in_a_OBJECTS = plug-in-enums.$(OBJEXT) \
+	gimpenvirontable.$(OBJEXT) gimpinterpreterdb.$(OBJEXT) \
+	gimpplugindebug.$(OBJEXT) gimpplugin.$(OBJEXT) \
+	gimpplugin-cleanup.$(OBJEXT) gimpplugin-context.$(OBJEXT) \
+	gimpplugin-message.$(OBJEXT) gimpplugin-progress.$(OBJEXT) \
+	gimpplugindef.$(OBJEXT) gimppluginerror.$(OBJEXT) \
+	gimppluginmanager.$(OBJEXT) gimppluginmanager-call.$(OBJEXT) \
+	gimppluginmanager-data.$(OBJEXT) \
+	gimppluginmanager-file.$(OBJEXT) \
+	gimppluginmanager-file-procedure.$(OBJEXT) \
+	gimppluginmanager-help-domain.$(OBJEXT) \
+	gimppluginmanager-locale-domain.$(OBJEXT) \
+	gimppluginmanager-menu-branch.$(OBJEXT) \
+	gimppluginmanager-query.$(OBJEXT) \
+	gimppluginmanager-restore.$(OBJEXT) \
+	gimppluginprocedure.$(OBJEXT) gimppluginprocframe.$(OBJEXT) \
+	gimppluginshm.$(OBJEXT) gimptemporaryprocedure.$(OBJEXT) \
+	plug-in-menu-path.$(OBJEXT) plug-in-params.$(OBJEXT) \
+	plug-in-rc.$(OBJEXT)
+libappplug_in_a_OBJECTS = $(am_libappplug_in_a_OBJECTS)
+AM_V_P = $(am__v_P_@AM_V@)
+am__v_P_ = $(am__v_P_@AM_DEFAULT_V@)
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+am__v_P_1 = :
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+am__v_GEN_ = $(am__v_GEN_@AM_DEFAULT_V@)
+am__v_GEN_0 = @echo "  GEN     " $@;
+am__v_GEN_1 = 
+AM_V_at = $(am__v_at_@AM_V@)
+am__v_at_ = $(am__v_at_@AM_DEFAULT_V@)
+am__v_at_0 = @
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+am__maybe_remake_depfiles = depfiles
+am__depfiles_remade = ./$(DEPDIR)/gimpenvirontable.Po \
+	./$(DEPDIR)/gimpinterpreterdb.Po \
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+	./$(DEPDIR)/gimpplugin-message.Po \
+	./$(DEPDIR)/gimpplugin-progress.Po ./$(DEPDIR)/gimpplugin.Po \
+	./$(DEPDIR)/gimpplugindebug.Po ./$(DEPDIR)/gimpplugindef.Po \
+	./$(DEPDIR)/gimppluginerror.Po \
+	./$(DEPDIR)/gimppluginmanager-call.Po \
+	./$(DEPDIR)/gimppluginmanager-data.Po \
+	./$(DEPDIR)/gimppluginmanager-file-procedure.Po \
+	./$(DEPDIR)/gimppluginmanager-file.Po \
+	./$(DEPDIR)/gimppluginmanager-help-domain.Po \
+	./$(DEPDIR)/gimppluginmanager-locale-domain.Po \
+	./$(DEPDIR)/gimppluginmanager-menu-branch.Po \
+	./$(DEPDIR)/gimppluginmanager-query.Po \
+	./$(DEPDIR)/gimppluginmanager-restore.Po \
+	./$(DEPDIR)/gimppluginmanager.Po \
+	./$(DEPDIR)/gimppluginprocedure.Po \
+	./$(DEPDIR)/gimppluginprocframe.Po \
+	./$(DEPDIR)/gimppluginshm.Po \
+	./$(DEPDIR)/gimptemporaryprocedure.Po \
+	./$(DEPDIR)/plug-in-enums.Po ./$(DEPDIR)/plug-in-menu-path.Po \
+	./$(DEPDIR)/plug-in-params.Po ./$(DEPDIR)/plug-in-rc.Po
+am__mv = mv -f
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+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
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+am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
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+LTCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) \
+	$(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) \
+	$(AM_CFLAGS) $(CFLAGS)
+AM_V_CC = $(am__v_CC_@AM_V@)
+am__v_CC_ = $(am__v_CC_@AM_DEFAULT_V@)
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+am__v_CC_1 = 
+CCLD = $(CC)
+LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+	$(AM_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_CCLD = $(am__v_CCLD_@AM_V@)
+am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
+am__v_CCLD_0 = @echo "  CCLD    " $@;
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+  case $$AM_UPDATE_INFO_DIR in \
+    n|no|NO) false;; \
+    *) (install-info --version) >/dev/null 2>&1;; \
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+am__tagged_files = $(HEADERS) $(SOURCES) $(TAGS_FILES) $(LISP)
+# Read a list of newline-separated strings from the standard input,
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+# *not* preserved.
+am__uniquify_input = $(AWK) '\
+  BEGIN { nonempty = 0; } \
+  { items[$$0] = 1; nonempty = 1; } \
+  END { if (nonempty) { for (i in items) print i; }; } \
+'
+# Make sure the list of sources is unique.  This is necessary because,
+# e.g., the same source file might be shared among _SOURCES variables
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+am__define_uniq_tagged_files = \
+  list='$(am__tagged_files)'; \
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+    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+  done | $(am__uniquify_input)`
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+GIO_WINDOWS_CFLAGS = @GIO_WINDOWS_CFLAGS@
+GIO_WINDOWS_LIBS = @GIO_WINDOWS_LIBS@
+GLIB_CFLAGS = @GLIB_CFLAGS@
+GLIB_COMPILE_RESOURCES = @GLIB_COMPILE_RESOURCES@
+GLIB_GENMARSHAL = @GLIB_GENMARSHAL@
+GLIB_LIBS = @GLIB_LIBS@
+GLIB_MKENUMS = @GLIB_MKENUMS@
+GLIB_REQUIRED_VERSION = @GLIB_REQUIRED_VERSION@
+GMODULE_NO_EXPORT_CFLAGS = @GMODULE_NO_EXPORT_CFLAGS@
+GMODULE_NO_EXPORT_LIBS = @GMODULE_NO_EXPORT_LIBS@
+GMOFILES = @GMOFILES@
+GMSGFMT = @GMSGFMT@
+GOBJECT_QUERY = @GOBJECT_QUERY@
+GREP = @GREP@
+GS_LIBS = @GS_LIBS@
+GTKDOC_CHECK = @GTKDOC_CHECK@
+GTKDOC_CHECK_PATH = @GTKDOC_CHECK_PATH@
+GTKDOC_DEPS_CFLAGS = @GTKDOC_DEPS_CFLAGS@
+GTKDOC_DEPS_LIBS = @GTKDOC_DEPS_LIBS@
+GTKDOC_MKPDF = @GTKDOC_MKPDF@
+GTKDOC_REBASE = @GTKDOC_REBASE@
+GTK_CFLAGS = @GTK_CFLAGS@
+GTK_LIBS = @GTK_LIBS@
+GTK_MAC_INTEGRATION_CFLAGS = @GTK_MAC_INTEGRATION_CFLAGS@
+GTK_MAC_INTEGRATION_LIBS = @GTK_MAC_INTEGRATION_LIBS@
+GTK_REQUIRED_VERSION = @GTK_REQUIRED_VERSION@
+GTK_UPDATE_ICON_CACHE = @GTK_UPDATE_ICON_CACHE@
+GUDEV_CFLAGS = @GUDEV_CFLAGS@
+GUDEV_LIBS = @GUDEV_LIBS@
+HARFBUZZ_CFLAGS = @HARFBUZZ_CFLAGS@
+HARFBUZZ_LIBS = @HARFBUZZ_LIBS@
+HARFBUZZ_REQUIRED_VERSION = @HARFBUZZ_REQUIRED_VERSION@
+HAVE_CXX14 = @HAVE_CXX14@
+HAVE_FINITE = @HAVE_FINITE@
+HAVE_ISFINITE = @HAVE_ISFINITE@
+HAVE_VFORK = @HAVE_VFORK@
+HOST_GLIB_COMPILE_RESOURCES = @HOST_GLIB_COMPILE_RESOURCES@
+HTML_DIR = @HTML_DIR@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+INSTOBJEXT = @INSTOBJEXT@
+INTLLIBS = @INTLLIBS@
+INTLTOOL_EXTRACT = @INTLTOOL_EXTRACT@
+INTLTOOL_MERGE = @INTLTOOL_MERGE@
+INTLTOOL_PERL = @INTLTOOL_PERL@
+INTLTOOL_REQUIRED_VERSION = @INTLTOOL_REQUIRED_VERSION@
+INTLTOOL_UPDATE = @INTLTOOL_UPDATE@
+INTLTOOL_V_MERGE = @INTLTOOL_V_MERGE@
+INTLTOOL_V_MERGE_OPTIONS = @INTLTOOL_V_MERGE_OPTIONS@
+INTLTOOL__v_MERGE_ = @INTLTOOL__v_MERGE_@
+INTLTOOL__v_MERGE_0 = @INTLTOOL__v_MERGE_0@
+INTL_MACOSX_LIBS = @INTL_MACOSX_LIBS@
+ISO_CODES_LOCALEDIR = @ISO_CODES_LOCALEDIR@
+ISO_CODES_LOCATION = @ISO_CODES_LOCATION@
+JPEG_LIBS = @JPEG_LIBS@
+JSON_GLIB_CFLAGS = @JSON_GLIB_CFLAGS@
+JSON_GLIB_LIBS = @JSON_GLIB_LIBS@
+JXL_CFLAGS = @JXL_CFLAGS@
+JXL_LIBS = @JXL_LIBS@
+JXL_THREADS_CFLAGS = @JXL_THREADS_CFLAGS@
+JXL_THREADS_LIBS = @JXL_THREADS_LIBS@
+LCMS_CFLAGS = @LCMS_CFLAGS@
+LCMS_LIBS = @LCMS_LIBS@
+LCMS_REQUIRED_VERSION = @LCMS_REQUIRED_VERSION@
+LD = @LD@
+LDFLAGS = @LDFLAGS@
+LDFLAGS_FOR_BUILD = @LDFLAGS_FOR_BUILD@
+LIBBACKTRACE_LIBS = @LIBBACKTRACE_LIBS@
+LIBHEIF_CFLAGS = @LIBHEIF_CFLAGS@
+LIBHEIF_LIBS = @LIBHEIF_LIBS@
+LIBHEIF_REQUIRED_VERSION = @LIBHEIF_REQUIRED_VERSION@
+LIBJXL_REQUIRED_VERSION = @LIBJXL_REQUIRED_VERSION@
+LIBLZMA_REQUIRED_VERSION = @LIBLZMA_REQUIRED_VERSION@
+LIBMYPAINT_CFLAGS = @LIBMYPAINT_CFLAGS@
+LIBMYPAINT_LIBS = @LIBMYPAINT_LIBS@
+LIBMYPAINT_REQUIRED_VERSION = @LIBMYPAINT_REQUIRED_VERSION@
+LIBOBJS = @LIBOBJS@
+LIBPNG_REQUIRED_VERSION = @LIBPNG_REQUIRED_VERSION@
+LIBS = @LIBS@
+LIBTOOL = @LIBTOOL@
+LIBUNWIND_CFLAGS = @LIBUNWIND_CFLAGS@
+LIBUNWIND_LIBS = @LIBUNWIND_LIBS@
+LIBUNWIND_REQUIRED_VERSION = @LIBUNWIND_REQUIRED_VERSION@
+LIPO = @LIPO@
+LN_S = @LN_S@
+LTLIBOBJS = @LTLIBOBJS@
+LT_CURRENT_MINUS_AGE = @LT_CURRENT_MINUS_AGE@
+LT_SYS_LIBRARY_PATH = @LT_SYS_LIBRARY_PATH@
+LT_VERSION_INFO = @LT_VERSION_INFO@
+LZMA_CFLAGS = @LZMA_CFLAGS@
+LZMA_LIBS = @LZMA_LIBS@
+MAIL = @MAIL@
+MAINT = @MAINT@
+MAKEINFO = @MAKEINFO@
+MANIFEST_TOOL = @MANIFEST_TOOL@
+MIME_INFO_CFLAGS = @MIME_INFO_CFLAGS@
+MIME_INFO_LIBS = @MIME_INFO_LIBS@
+MIME_TYPES = @MIME_TYPES@
+MKDIR_P = @MKDIR_P@
+MKINSTALLDIRS = @MKINSTALLDIRS@
+MMX_EXTRA_CFLAGS = @MMX_EXTRA_CFLAGS@
+MNG_CFLAGS = @MNG_CFLAGS@
+MNG_LIBS = @MNG_LIBS@
+MSGFMT = @MSGFMT@
+MSGFMT_OPTS = @MSGFMT_OPTS@
+MSGMERGE = @MSGMERGE@
+MYPAINT_BRUSHES_CFLAGS = @MYPAINT_BRUSHES_CFLAGS@
+MYPAINT_BRUSHES_LIBS = @MYPAINT_BRUSHES_LIBS@
+NATIVE_GLIB_CFLAGS = @NATIVE_GLIB_CFLAGS@
+NATIVE_GLIB_LIBS = @NATIVE_GLIB_LIBS@
+NM = @NM@
+NMEDIT = @NMEDIT@
+OBJDUMP = @OBJDUMP@
+OBJEXT = @OBJEXT@
+OPENEXR_CFLAGS = @OPENEXR_CFLAGS@
+OPENEXR_LIBS = @OPENEXR_LIBS@
+OPENEXR_REQUIRED_VERSION = @OPENEXR_REQUIRED_VERSION@
+OPENJPEG_CFLAGS = @OPENJPEG_CFLAGS@
+OPENJPEG_LIBS = @OPENJPEG_LIBS@
+OPENJPEG_REQUIRED_VERSION = @OPENJPEG_REQUIRED_VERSION@
+OTOOL = @OTOOL@
+OTOOL64 = @OTOOL64@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PANGOCAIRO_CFLAGS = @PANGOCAIRO_CFLAGS@
+PANGOCAIRO_LIBS = @PANGOCAIRO_LIBS@
+PANGOCAIRO_REQUIRED_VERSION = @PANGOCAIRO_REQUIRED_VERSION@
+PATHSEP = @PATHSEP@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+PERL = @PERL@
+PERL_REQUIRED_VERSION = @PERL_REQUIRED_VERSION@
+PERL_VERSION = @PERL_VERSION@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
+PNG_CFLAGS = @PNG_CFLAGS@
+PNG_LIBS = @PNG_LIBS@
+POFILES = @POFILES@
+POPPLER_CFLAGS = @POPPLER_CFLAGS@
+POPPLER_DATA_CFLAGS = @POPPLER_DATA_CFLAGS@
+POPPLER_DATA_LIBS = @POPPLER_DATA_LIBS@
+POPPLER_DATA_REQUIRED_VERSION = @POPPLER_DATA_REQUIRED_VERSION@
+POPPLER_LIBS = @POPPLER_LIBS@
+POPPLER_REQUIRED_VERSION = @POPPLER_REQUIRED_VERSION@
+POSUB = @POSUB@
+PO_IN_DATADIR_FALSE = @PO_IN_DATADIR_FALSE@
+PO_IN_DATADIR_TRUE = @PO_IN_DATADIR_TRUE@
+PYBIN_PATH = @PYBIN_PATH@
+PYCAIRO_CFLAGS = @PYCAIRO_CFLAGS@
+PYCAIRO_LIBS = @PYCAIRO_LIBS@
+PYGIMP_EXTRA_CFLAGS = @PYGIMP_EXTRA_CFLAGS@
+PYGTK_CFLAGS = @PYGTK_CFLAGS@
+PYGTK_CODEGEN = @PYGTK_CODEGEN@
+PYGTK_DEFSDIR = @PYGTK_DEFSDIR@
+PYGTK_LIBS = @PYGTK_LIBS@
+PYLINK_LIBS = @PYLINK_LIBS@
+PYTHON = @PYTHON@
+PYTHON2_REQUIRED_VERSION = @PYTHON2_REQUIRED_VERSION@
+PYTHON_EXEC_PREFIX = @PYTHON_EXEC_PREFIX@
+PYTHON_INCLUDES = @PYTHON_INCLUDES@
+PYTHON_PLATFORM = @PYTHON_PLATFORM@
+PYTHON_PREFIX = @PYTHON_PREFIX@
+PYTHON_VERSION = @PYTHON_VERSION@
+RANLIB = @RANLIB@
+RSVG_REQUIRED_VERSION = @RSVG_REQUIRED_VERSION@
+RT_LIBS = @RT_LIBS@
+SCREENSHOT_LIBS = @SCREENSHOT_LIBS@
+SED = @SED@
+SENDMAIL = @SENDMAIL@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+SOCKET_LIBS = @SOCKET_LIBS@
+SSE2_EXTRA_CFLAGS = @SSE2_EXTRA_CFLAGS@
+SSE4_1_EXTRA_CFLAGS = @SSE4_1_EXTRA_CFLAGS@
+SSE_EXTRA_CFLAGS = @SSE_EXTRA_CFLAGS@
+STRIP = @STRIP@
+SVG_CFLAGS = @SVG_CFLAGS@
+SVG_LIBS = @SVG_LIBS@
+SYMPREFIX = @SYMPREFIX@
+TIFF_LIBS = @TIFF_LIBS@
+USE_NLS = @USE_NLS@
+VERSION = @VERSION@
+WEBKIT_CFLAGS = @WEBKIT_CFLAGS@
+WEBKIT_LIBS = @WEBKIT_LIBS@
+WEBKIT_REQUIRED_VERSION = @WEBKIT_REQUIRED_VERSION@
+WEBPDEMUX_CFLAGS = @WEBPDEMUX_CFLAGS@
+WEBPDEMUX_LIBS = @WEBPDEMUX_LIBS@
+WEBPMUX_CFLAGS = @WEBPMUX_CFLAGS@
+WEBPMUX_LIBS = @WEBPMUX_LIBS@
+WEBP_CFLAGS = @WEBP_CFLAGS@
+WEBP_LIBS = @WEBP_LIBS@
+WEBP_REQUIRED_VERSION = @WEBP_REQUIRED_VERSION@
+WEB_PAGE = @WEB_PAGE@
+WIN32_LARGE_ADDRESS_AWARE = @WIN32_LARGE_ADDRESS_AWARE@
+WINDRES = @WINDRES@
+WMF_CFLAGS = @WMF_CFLAGS@
+WMF_CONFIG = @WMF_CONFIG@
+WMF_LIBS = @WMF_LIBS@
+WMF_REQUIRED_VERSION = @WMF_REQUIRED_VERSION@
+XDG_EMAIL = @XDG_EMAIL@
+XFIXES_CFLAGS = @XFIXES_CFLAGS@
+XFIXES_LIBS = @XFIXES_LIBS@
+XGETTEXT = @XGETTEXT@
+XGETTEXT_REQUIRED_VERSION = @XGETTEXT_REQUIRED_VERSION@
+XMC_CFLAGS = @XMC_CFLAGS@
+XMC_LIBS = @XMC_LIBS@
+XMKMF = @XMKMF@
+XMLLINT = @XMLLINT@
+XMU_LIBS = @XMU_LIBS@
+XPM_LIBS = @XPM_LIBS@
+XSLTPROC = @XSLTPROC@
+XVFB_RUN = @XVFB_RUN@
+X_CFLAGS = @X_CFLAGS@
+X_EXTRA_LIBS = @X_EXTRA_LIBS@
+X_LIBS = @X_LIBS@
+X_PRE_LIBS = @X_PRE_LIBS@
+Z_LIBS = @Z_LIBS@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_ct_AR = @ac_ct_AR@
+ac_ct_CC = @ac_ct_CC@
+ac_ct_CC_FOR_BUILD = @ac_ct_CC_FOR_BUILD@
+ac_ct_CXX = @ac_ct_CXX@
+ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
+am__include = @am__include@
+am__leading_dot = @am__leading_dot@
+am__quote = @am__quote@
+am__tar = @am__tar@
+am__untar = @am__untar@
+bindir = @bindir@
+build = @build@
+build_alias = @build_alias@
+build_cpu = @build_cpu@
+build_os = @build_os@
+build_vendor = @build_vendor@
+builddir = @builddir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+exec_prefix = @exec_prefix@
+gimpdatadir = @gimpdatadir@
+gimpdir = @gimpdir@
+gimplocaledir = @gimplocaledir@
+gimpplugindir = @gimpplugindir@
+gimpsysconfdir = @gimpsysconfdir@
+host = @host@
+host_alias = @host_alias@
+host_cpu = @host_cpu@
+host_os = @host_os@
+host_vendor = @host_vendor@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+intltool__v_merge_options_ = @intltool__v_merge_options_@
+intltool__v_merge_options_0 = @intltool__v_merge_options_0@
+libdir = @libdir@
+libexecdir = @libexecdir@
+localedir = @localedir@
+localstatedir = @localstatedir@
+mandir = @mandir@
+manpage_gimpdir = @manpage_gimpdir@
+mkdir_p = @mkdir_p@
+ms_librarian = @ms_librarian@
+mypaint_brushes_dir = @mypaint_brushes_dir@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+pkgpyexecdir = @pkgpyexecdir@
+pkgpythondir = @pkgpythondir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+pyexecdir = @pyexecdir@
+pythondir = @pythondir@
+runstatedir = @runstatedir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+AM_CPPFLAGS = \
+	-DG_LOG_DOMAIN=\"Gimp-Plug-In\"	\
+	-I$(top_builddir)		\
+	-I$(top_srcdir)			\
+	-I$(top_builddir)/app		\
+	-I$(top_srcdir)/app		\
+	$(CAIRO_CFLAGS)			\
+	$(GEGL_CFLAGS)			\
+	$(GDK_PIXBUF_CFLAGS)		\
+	-I$(includedir)
+
+noinst_LIBRARIES = libappplug-in.a
+libappplug_in_a_SOURCES = \
+	plug-in-enums.c 			\
+	plug-in-enums.h 			\
+	plug-in-types.h 			\
+	\
+	gimpenvirontable.c			\
+	gimpenvirontable.h			\
+	gimpinterpreterdb.c			\
+	gimpinterpreterdb.h			\
+	gimpplugindebug.c			\
+	gimpplugindebug.h			\
+	gimpplugin.c				\
+	gimpplugin.h				\
+	gimpplugin-cleanup.c			\
+	gimpplugin-cleanup.h			\
+	gimpplugin-context.c			\
+	gimpplugin-context.h			\
+	gimpplugin-message.c			\
+	gimpplugin-message.h			\
+	gimpplugin-progress.c			\
+	gimpplugin-progress.h			\
+	gimpplugindef.c				\
+	gimpplugindef.h				\
+	gimppluginerror.c 			\
+	gimppluginerror.h 			\
+	gimppluginmanager.c			\
+	gimppluginmanager.h			\
+	gimppluginmanager-call.c		\
+	gimppluginmanager-call.h		\
+	gimppluginmanager-data.c		\
+	gimppluginmanager-data.h		\
+	gimppluginmanager-file.c		\
+	gimppluginmanager-file.h		\
+	gimppluginmanager-file-procedure.c	\
+	gimppluginmanager-file-procedure.h	\
+	gimppluginmanager-help-domain.c		\
+	gimppluginmanager-help-domain.h		\
+	gimppluginmanager-locale-domain.c	\
+	gimppluginmanager-locale-domain.h	\
+	gimppluginmanager-menu-branch.c		\
+	gimppluginmanager-menu-branch.h		\
+	gimppluginmanager-query.c		\
+	gimppluginmanager-query.h		\
+	gimppluginmanager-restore.c		\
+	gimppluginmanager-restore.h		\
+	gimppluginprocedure.c			\
+	gimppluginprocedure.h			\
+	gimppluginprocframe.c			\
+	gimppluginprocframe.h			\
+	gimppluginshm.c				\
+	gimppluginshm.h				\
+	gimptemporaryprocedure.c		\
+	gimptemporaryprocedure.h		\
+	\
+	plug-in-menu-path.c			\
+	plug-in-menu-path.h			\
+	plug-in-params.c			\
+	plug-in-params.h			\
+	plug-in-rc.c				\
+	plug-in-rc.h
+
+
+#
+# rules to generate built sources
+#
+# setup autogeneration dependencies
+gen_sources = xgen-pec
+CLEANFILES = $(EXTRA_PROGRAMS) $(gen_sources)
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .o .obj
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu app/plug-in/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu app/plug-in/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+clean-noinstLIBRARIES:
+	-test -z "$(noinst_LIBRARIES)" || rm -f $(noinst_LIBRARIES)
+
+libappplug-in.a: $(libappplug_in_a_OBJECTS) $(libappplug_in_a_DEPENDENCIES) $(EXTRA_libappplug_in_a_DEPENDENCIES) 
+	$(AM_V_at)-rm -f libappplug-in.a
+	$(AM_V_AR)$(libappplug_in_a_AR) libappplug-in.a $(libappplug_in_a_OBJECTS) $(libappplug_in_a_LIBADD)
+	$(AM_V_at)$(RANLIB) libappplug-in.a
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpenvirontable.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpinterpreterdb.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpplugin-cleanup.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpplugin-context.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpplugin-message.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpplugin-progress.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpplugin.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpplugindebug.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpplugindef.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginerror.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginmanager-call.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginmanager-data.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginmanager-file-procedure.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginmanager-file.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginmanager-help-domain.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginmanager-locale-domain.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginmanager-menu-branch.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginmanager-query.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginmanager-restore.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginmanager.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginprocedure.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginprocframe.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppluginshm.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimptemporaryprocedure.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/plug-in-enums.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/plug-in-menu-path.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/plug-in-params.Po@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/plug-in-rc.Po@am__quote@ # am--include-marker
+
+$(am__depfiles_remade):
+	@$(MKDIR_P) $(@D)
+	@echo '# dummy' >$@-t && $(am__mv) $@-t $@
+
+am--depfiles: $(am__depfiles_remade)
+
+.c.o:
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(COMPILE) -c -o $@ $<
+
+.c.obj:
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ `$(CYGPATH_W) '$<'`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(COMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
+
+.c.lo:
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LTCOMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LTCOMPILE) -c -o $@ $<
+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+
+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
+tags: tags-am
+TAGS: tags
+
+tags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	set x; \
+	here=`pwd`; \
+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
+
+CTAGS: ctags
+ctags-am: $(TAGS_DEPENDENCIES) $(am__tagged_files)
+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-am
+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$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
+check-am: all-am
+check: check-am
+all-am: Makefile $(LIBRARIES)
+installdirs:
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(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:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-noinstLIBRARIES \
+	mostlyclean-am
+
+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/gimpenvirontable.Po
+	-rm -f ./$(DEPDIR)/gimpinterpreterdb.Po
+	-rm -f ./$(DEPDIR)/gimpplugin-cleanup.Po
+	-rm -f ./$(DEPDIR)/gimpplugin-context.Po
+	-rm -f ./$(DEPDIR)/gimpplugin-message.Po
+	-rm -f ./$(DEPDIR)/gimpplugin-progress.Po
+	-rm -f ./$(DEPDIR)/gimpplugin.Po
+	-rm -f ./$(DEPDIR)/gimpplugindebug.Po
+	-rm -f ./$(DEPDIR)/gimpplugindef.Po
+	-rm -f ./$(DEPDIR)/gimppluginerror.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-call.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-data.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-file-procedure.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-file.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-help-domain.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-locale-domain.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-menu-branch.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-query.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-restore.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager.Po
+	-rm -f ./$(DEPDIR)/gimppluginprocedure.Po
+	-rm -f ./$(DEPDIR)/gimppluginprocframe.Po
+	-rm -f ./$(DEPDIR)/gimppluginshm.Po
+	-rm -f ./$(DEPDIR)/gimptemporaryprocedure.Po
+	-rm -f ./$(DEPDIR)/plug-in-enums.Po
+	-rm -f ./$(DEPDIR)/plug-in-menu-path.Po
+	-rm -f ./$(DEPDIR)/plug-in-params.Po
+	-rm -f ./$(DEPDIR)/plug-in-rc.Po
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+		-rm -f ./$(DEPDIR)/gimpenvirontable.Po
+	-rm -f ./$(DEPDIR)/gimpinterpreterdb.Po
+	-rm -f ./$(DEPDIR)/gimpplugin-cleanup.Po
+	-rm -f ./$(DEPDIR)/gimpplugin-context.Po
+	-rm -f ./$(DEPDIR)/gimpplugin-message.Po
+	-rm -f ./$(DEPDIR)/gimpplugin-progress.Po
+	-rm -f ./$(DEPDIR)/gimpplugin.Po
+	-rm -f ./$(DEPDIR)/gimpplugindebug.Po
+	-rm -f ./$(DEPDIR)/gimpplugindef.Po
+	-rm -f ./$(DEPDIR)/gimppluginerror.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-call.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-data.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-file-procedure.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-file.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-help-domain.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-locale-domain.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-menu-branch.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-query.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager-restore.Po
+	-rm -f ./$(DEPDIR)/gimppluginmanager.Po
+	-rm -f ./$(DEPDIR)/gimppluginprocedure.Po
+	-rm -f ./$(DEPDIR)/gimppluginprocframe.Po
+	-rm -f ./$(DEPDIR)/gimppluginshm.Po
+	-rm -f ./$(DEPDIR)/gimptemporaryprocedure.Po
+	-rm -f ./$(DEPDIR)/plug-in-enums.Po
+	-rm -f ./$(DEPDIR)/plug-in-menu-path.Po
+	-rm -f ./$(DEPDIR)/plug-in-params.Po
+	-rm -f ./$(DEPDIR)/plug-in-rc.Po
+	-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:
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-generic clean-libtool clean-noinstLIBRARIES \
+	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-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
+
+.PRECIOUS: Makefile
+
+
+xgen-pec: $(srcdir)/plug-in-enums.h $(GIMP_MKENUMS) Makefile.am
+	$(AM_V_GEN) $(GIMP_MKENUMS) \
+		--fhead "#include \"config.h\"\n#include <gio/gio.h>\n#include \"libgimpbase/gimpbase.h\"\n#include \"plug-in-enums.h\"\n#include \"gimp-intl.h\"" \
+		--fprod "\n/* enumerations from \"@basename@\" */" \
+		--vhead "GType\n@enum_name@_get_type (void)\n{\n  static const G@Type@Value values[] =\n  {" \
+		--vprod "    { @VALUENAME@, \"@VALUENAME@\", \"@valuenick@\" }," \
+		--vtail "    { 0, NULL, NULL }\n  };\n" \
+		--dhead "  static const Gimp@Type@Desc descs[] =\n  {" \
+		--dprod "    { @VALUENAME@, @valuedesc@, @valuehelp@ },@if ('@valueabbrev@' ne 'NULL')@\n    /* Translators: this is an abbreviated version of @valueudesc@.\n       Keep it short. */\n    { @VALUENAME@, @valueabbrev@, NULL },@endif@" \
+		--dtail "    { 0, NULL, NULL }\n  };\n\n  static GType type = 0;\n\n  if (G_UNLIKELY (! type))\n    {\n      type = g_@type@_register_static (\"@EnumName@\", values);\n      gimp_type_set_translation_context (type, \"@enumnick@\");\n      gimp_@type@_set_value_descriptions (type, descs);\n    }\n\n  return type;\n}\n" \
+		$< > $@
+
+# copy the generated enum file back to the source directory only if it's
+# changed; otherwise, only update its timestamp, so that the recipe isn't
+# executed again on the next build, however, allow this to (harmlessly) fail,
+# to support building from a read-only source tree.
+$(srcdir)/plug-in-enums.c: xgen-pec
+	$(AM_V_GEN) if ! cmp -s $< $@; then \
+		cp $< $@; \
+	else \
+		touch $@ 2> /dev/null \
+		|| true; \
+	fi
+
+# 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/app/plug-in/gimpenvirontable.c b/app/plug-in/gimpenvirontable.c
new file mode 100644
index 0000000..82f2840
--- /dev/null
+++ b/app/plug-in/gimpenvirontable.c
@@ -0,0 +1,518 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpenvirontable.c
+ * (C) 2002 Manish Singh <yosh@gimp.org>
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gio/gio.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpconfig/gimpconfig.h"
+
+#include "plug-in-types.h"
+
+#include "gimpenvirontable.h"
+
+#include "gimp-intl.h"
+
+
+typedef struct _GimpEnvironValue GimpEnvironValue;
+
+struct _GimpEnvironValue
+{
+  gchar *value;
+  gchar *separator;
+};
+
+
+static void     gimp_environ_table_finalize       (GObject               *object);
+
+static void     gimp_environ_table_load_env_file  (GimpEnvironTable      *environ_table,
+                                                   GFile                 *file);
+static gboolean gimp_environ_table_legal_name     (gchar                 *name);
+
+static void     gimp_environ_table_populate       (GimpEnvironTable      *environ_table);
+static void     gimp_environ_table_populate_one   (const gchar           *name,
+                                                   GimpEnvironValue      *val,
+                                                   GPtrArray             *env_array);
+static gboolean gimp_environ_table_pass_through   (GimpEnvironTable      *environ_table,
+                                                   const gchar           *name);
+
+static void     gimp_environ_table_clear_vars     (GimpEnvironTable      *environ_table);
+static void     gimp_environ_table_clear_internal (GimpEnvironTable      *environ_table);
+static void     gimp_environ_table_clear_envp     (GimpEnvironTable      *environ_table);
+
+static void     gimp_environ_table_free_value     (GimpEnvironValue      *val);
+
+
+G_DEFINE_TYPE (GimpEnvironTable, gimp_environ_table, G_TYPE_OBJECT)
+
+#define parent_class gimp_environ_table_parent_class
+
+
+static void
+gimp_environ_table_class_init (GimpEnvironTableClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+
+  object_class->finalize = gimp_environ_table_finalize;
+}
+
+static void
+gimp_environ_table_init (GimpEnvironTable *environ_table)
+{
+}
+
+static void
+gimp_environ_table_finalize (GObject *object)
+{
+  GimpEnvironTable *environ_table = GIMP_ENVIRON_TABLE (object);
+
+  gimp_environ_table_clear_all (environ_table);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+GimpEnvironTable *
+gimp_environ_table_new (gboolean verbose)
+{
+  GimpEnvironTable *table = g_object_new (GIMP_TYPE_ENVIRON_TABLE, NULL);
+
+  table->verbose = verbose;
+
+  return table;
+}
+
+static guint
+gimp_environ_table_str_hash (gconstpointer v)
+{
+#ifdef G_OS_WIN32
+  gchar *p      = g_ascii_strup ((const gchar *) v, -1);
+  guint  retval = g_str_hash (p);
+
+  g_free (p);
+
+  return retval;
+#else
+  return g_str_hash (v);
+#endif
+}
+
+static gboolean
+gimp_environ_table_str_equal (gconstpointer v1,
+                              gconstpointer v2)
+{
+#ifdef G_OS_WIN32
+  gchar    *string1 = g_ascii_strup ((const gchar *) v1, -1);
+  gchar    *string2 = g_ascii_strup ((const gchar *) v2, -1);
+  gboolean  retval  = g_str_equal (string1, string2);
+
+  g_free (string1);
+  g_free (string2);
+
+  return retval;
+#else
+  return g_str_equal (v1, v2);
+#endif
+}
+
+void
+gimp_environ_table_load (GimpEnvironTable *environ_table,
+                         GList            *path)
+{
+  GList *list;
+
+  g_return_if_fail (GIMP_IS_ENVIRON_TABLE (environ_table));
+
+  gimp_environ_table_clear (environ_table);
+
+  environ_table->vars =
+    g_hash_table_new_full (gimp_environ_table_str_hash,
+                           gimp_environ_table_str_equal,
+                           g_free,
+                           (GDestroyNotify) gimp_environ_table_free_value);
+
+  for (list = path; list; list = g_list_next (list))
+    {
+      GFile           *dir = list->data;
+      GFileEnumerator *enumerator;
+
+      enumerator =
+        g_file_enumerate_children (dir,
+                                   G_FILE_ATTRIBUTE_STANDARD_NAME ","
+                                   G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN ","
+                                   G_FILE_ATTRIBUTE_STANDARD_TYPE,
+                                   G_FILE_QUERY_INFO_NONE,
+                                   NULL, NULL);
+
+      if (enumerator)
+        {
+          GFileInfo *info;
+
+          while ((info = g_file_enumerator_next_file (enumerator,
+                                                      NULL, NULL)))
+            {
+              if (! g_file_info_get_is_hidden (info) &&
+                  g_file_info_get_file_type (info) == G_FILE_TYPE_REGULAR)
+                {
+                  GFile *file = g_file_enumerator_get_child (enumerator, info);
+
+                  gimp_environ_table_load_env_file (environ_table, file);
+
+                  g_object_unref (file);
+                }
+
+              g_object_unref (info);
+            }
+
+          g_object_unref (enumerator);
+        }
+    }
+}
+
+void
+gimp_environ_table_add (GimpEnvironTable *environ_table,
+                        const gchar      *name,
+                        const gchar      *value,
+                        const gchar      *separator)
+{
+  GimpEnvironValue *val;
+
+  g_return_if_fail (GIMP_IS_ENVIRON_TABLE (environ_table));
+
+  gimp_environ_table_clear_envp (environ_table);
+
+  if (! environ_table->internal)
+    environ_table->internal =
+      g_hash_table_new_full (g_str_hash, g_str_equal,
+                             g_free,
+                             (GDestroyNotify) gimp_environ_table_free_value);
+
+  val = g_slice_new (GimpEnvironValue);
+
+  val->value     = g_strdup (value);
+  val->separator = g_strdup (separator);
+
+  g_hash_table_insert (environ_table->internal, g_strdup (name), val);
+}
+
+void
+gimp_environ_table_remove (GimpEnvironTable *environ_table,
+                           const gchar      *name)
+{
+  g_return_if_fail (GIMP_IS_ENVIRON_TABLE (environ_table));
+
+  if (! environ_table->internal)
+    return;
+
+  gimp_environ_table_clear_envp (environ_table);
+
+  g_hash_table_remove (environ_table->internal, name);
+
+  if (g_hash_table_size (environ_table->internal) == 0)
+    gimp_environ_table_clear_internal (environ_table);
+}
+
+void
+gimp_environ_table_clear (GimpEnvironTable *environ_table)
+{
+  g_return_if_fail (GIMP_IS_ENVIRON_TABLE (environ_table));
+
+  gimp_environ_table_clear_envp (environ_table);
+
+  gimp_environ_table_clear_vars (environ_table);
+}
+
+void
+gimp_environ_table_clear_all (GimpEnvironTable *environ_table)
+{
+  g_return_if_fail (GIMP_IS_ENVIRON_TABLE (environ_table));
+
+  gimp_environ_table_clear_envp (environ_table);
+
+  gimp_environ_table_clear_vars (environ_table);
+  gimp_environ_table_clear_internal (environ_table);
+}
+
+gchar **
+gimp_environ_table_get_envp (GimpEnvironTable *environ_table)
+{
+  g_return_val_if_fail (GIMP_IS_ENVIRON_TABLE (environ_table), NULL);
+
+  /* Hmm.. should we return a copy here in the future? Not thread safe atm,
+   * but the rest of it isn't either.
+   */
+
+  if (! environ_table->envp)
+    gimp_environ_table_populate (environ_table);
+
+  return environ_table->envp;
+}
+
+
+/* private */
+
+static void
+gimp_environ_table_load_env_file (GimpEnvironTable *environ_table,
+                                  GFile            *file)
+{
+  GInputStream     *input;
+  GDataInputStream *data_input;
+  gchar            *buffer;
+  gsize             buffer_len;
+  GError           *error = NULL;
+
+  if (environ_table->verbose)
+    g_print ("Parsing '%s'\n", gimp_file_get_utf8_name (file));
+
+  input = G_INPUT_STREAM (g_file_read (file, NULL, &error));
+  if (! input)
+    {
+      g_message (_("Could not open '%s' for reading: %s"),
+                 gimp_file_get_utf8_name (file),
+                 error->message);
+      g_clear_error (&error);
+      return;
+    }
+
+  data_input = g_data_input_stream_new (input);
+  g_object_unref (input);
+
+  while ((buffer = g_data_input_stream_read_line (data_input, &buffer_len,
+                                                  NULL, &error)))
+    {
+      gchar *name;
+      gchar *value;
+      gchar *separator;
+      gchar *p;
+      gchar *q;
+
+      /* Skip comments */
+      if (buffer[0] == '#')
+        {
+          g_free (buffer);
+          continue;
+        }
+
+      p = strchr (buffer, '=');
+      if (! p)
+        {
+          g_free (buffer);
+          continue;
+        }
+
+      *p = '\0';
+
+      name = buffer;
+      value = p + 1;
+
+      if (name[0] == '\0')
+        {
+          g_message (_("Empty variable name in environment file %s"),
+                     gimp_file_get_utf8_name (file));
+          g_free (buffer);
+          continue;
+        }
+
+      separator = NULL;
+
+      q = strchr (name, ' ');
+      if (q)
+        {
+          *q = '\0';
+
+          separator = name;
+          name = q + 1;
+        }
+
+      if (! gimp_environ_table_legal_name (name))
+        {
+          g_message (_("Illegal variable name in environment file %s: %s"),
+                     gimp_file_get_utf8_name (file), name);
+          g_free (buffer);
+          continue;
+        }
+
+      if (! g_hash_table_lookup (environ_table->vars, name))
+        {
+          GimpEnvironValue *val = g_slice_new (GimpEnvironValue);
+
+          val->value     = gimp_config_path_expand (value, FALSE, NULL);
+          val->separator = g_strdup (separator);
+
+          g_hash_table_insert (environ_table->vars, g_strdup (name), val);
+        }
+
+      g_free (buffer);
+    }
+
+  if (error)
+    {
+      g_message (_("Error reading '%s': %s"),
+                 gimp_file_get_utf8_name (file),
+                 error->message);
+      g_clear_error (&error);
+    }
+
+  g_object_unref (data_input);
+}
+
+static gboolean
+gimp_environ_table_legal_name (gchar *name)
+{
+  gchar *s;
+
+  if (! g_ascii_isalpha (*name) && (*name != '_'))
+    return FALSE;
+
+  for (s = name + 1; *s; s++)
+    if (! g_ascii_isalnum (*s) && (*s != '_'))
+      return FALSE;
+
+  return TRUE;
+}
+
+static void
+gimp_environ_table_populate (GimpEnvironTable *environ_table)
+{
+  gchar     **env = g_listenv ();
+  gchar     **var;
+  GPtrArray  *env_array;
+
+  var = env;
+  env_array = g_ptr_array_new ();
+
+  while (*var)
+    {
+      /* g_listenv() only returns the names of environment variables
+       * that are correctly specified (name=value) in the environ
+       * array (Unix) or the process environment string table (Win32).
+       */
+
+      if (gimp_environ_table_pass_through (environ_table, *var))
+        g_ptr_array_add (env_array, g_strconcat (*var, "=", g_getenv (*var), NULL));
+
+      var++;
+    }
+
+  g_strfreev (env);
+
+  if (environ_table->vars)
+    g_hash_table_foreach (environ_table->vars,
+                          (GHFunc) gimp_environ_table_populate_one,
+                          env_array);
+
+  if (environ_table->internal)
+    g_hash_table_foreach (environ_table->internal,
+                          (GHFunc) gimp_environ_table_populate_one,
+                          env_array);
+
+  g_ptr_array_add (env_array, NULL);
+
+  environ_table->envp = (gchar **) g_ptr_array_free (env_array, FALSE);
+
+#ifdef ENVP_DEBUG
+  var = environ_table->envp;
+
+  g_print ("GimpEnvironTable:\n");
+  while (*var)
+    {
+      g_print ("%s\n", *var);
+      var++;
+    }
+#endif /* ENVP_DEBUG */
+}
+
+static void
+gimp_environ_table_populate_one (const gchar      *name,
+                                 GimpEnvironValue *val,
+                                 GPtrArray        *env_array)
+{
+  const gchar *old;
+  gchar *var = NULL;
+
+  if (val->separator)
+    {
+      old = g_getenv (name);
+
+      if (old)
+        var = g_strconcat (name, "=", val->value, val->separator, old, NULL);
+    }
+
+  if (! var)
+    var = g_strconcat (name, "=", val->value, NULL);
+
+  g_ptr_array_add (env_array, var);
+}
+
+static gboolean
+gimp_environ_table_pass_through (GimpEnvironTable *environ_table,
+                                 const gchar      *name)
+{
+  gboolean vars, internal;
+
+  vars = environ_table->vars &&
+         g_hash_table_lookup (environ_table->vars, name);
+
+  internal = environ_table->internal &&
+             g_hash_table_lookup (environ_table->internal, name);
+
+  return (!vars && !internal);
+}
+
+static void
+gimp_environ_table_clear_vars (GimpEnvironTable *environ_table)
+{
+  if (environ_table->vars)
+    {
+      g_hash_table_destroy (environ_table->vars);
+      environ_table->vars = NULL;
+    }
+}
+
+static void
+gimp_environ_table_clear_internal (GimpEnvironTable *environ_table)
+{
+  if (environ_table->internal)
+    {
+      g_hash_table_destroy (environ_table->internal);
+      environ_table->internal = NULL;
+    }
+}
+
+static void
+gimp_environ_table_clear_envp (GimpEnvironTable *environ_table)
+{
+  if (environ_table->envp)
+    {
+      g_strfreev (environ_table->envp);
+      environ_table->envp = NULL;
+    }
+}
+
+static void
+gimp_environ_table_free_value (GimpEnvironValue *val)
+{
+  g_free (val->value);
+  g_free (val->separator);
+
+  g_slice_free (GimpEnvironValue, val);
+}
diff --git a/app/plug-in/gimpenvirontable.h b/app/plug-in/gimpenvirontable.h
new file mode 100644
index 0000000..c77710d
--- /dev/null
+++ b/app/plug-in/gimpenvirontable.h
@@ -0,0 +1,72 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpenvirontable.h
+ * (C) 2002 Manish Singh <yosh@gimp.org>
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_ENVIRON_TABLE_H__
+#define __GIMP_ENVIRON_TABLE_H__
+
+
+#define GIMP_TYPE_ENVIRON_TABLE            (gimp_environ_table_get_type ())
+#define GIMP_ENVIRON_TABLE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_ENVIRON_TABLE, GimpEnvironTable))
+#define GIMP_ENVIRON_TABLE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_ENVIRON_TABLE, GimpEnvironTableClass))
+#define GIMP_IS_ENVIRON_TABLE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_ENVIRON_TABLE))
+#define GIMP_IS_ENVIRON_TABLE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_ENVIRON_TABLE))
+#define GIMP_ENVIRON_TABLE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_ENVIRON_TABLE, GimpEnvironTableClass))
+
+
+typedef struct _GimpEnvironTableClass GimpEnvironTableClass;
+
+struct _GimpEnvironTable
+{
+  GObject      parent_instance;
+
+  gboolean     verbose;
+
+  GHashTable  *vars;
+  GHashTable  *internal;
+
+  gchar      **envp;
+};
+
+struct _GimpEnvironTableClass
+{
+  GObjectClass  parent_class;
+};
+
+
+GType               gimp_environ_table_get_type  (void) G_GNUC_CONST;
+GimpEnvironTable  * gimp_environ_table_new       (gboolean          verbose);
+
+void                gimp_environ_table_load      (GimpEnvironTable *environ_table,
+                                                  GList            *path);
+
+void                gimp_environ_table_add       (GimpEnvironTable *environ_table,
+                                                  const gchar      *name,
+                                                  const gchar      *value,
+                                                  const gchar      *separator);
+void                gimp_environ_table_remove    (GimpEnvironTable *environ_table,
+                                                  const gchar      *name);
+
+void                gimp_environ_table_clear     (GimpEnvironTable *environ_table);
+void                gimp_environ_table_clear_all (GimpEnvironTable *environ_table);
+
+gchar            ** gimp_environ_table_get_envp  (GimpEnvironTable *environ_table);
+
+
+#endif /* __GIMP_ENVIRON_TABLE_H__ */
diff --git a/app/plug-in/gimpinterpreterdb.c b/app/plug-in/gimpinterpreterdb.c
new file mode 100644
index 0000000..2eb8f78
--- /dev/null
+++ b/app/plug-in/gimpinterpreterdb.c
@@ -0,0 +1,875 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpinterpreterdb.c
+ * (C) 2005 Manish Singh <yosh@gimp.org>
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+/*
+ * The binfmt_misc bits are derived from linux/fs/binfmt_misc.c
+ * Copyright (C) 1997 Richard Günther
+ */
+
+/*
+ * The sh-bang code is derived from linux/fs/binfmt_script.c
+ * Copyright (C) 1996  Martin von Löwis
+ * original #!-checking implemented by tytso.
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <gio/gio.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "plug-in-types.h"
+
+#include "gimpinterpreterdb.h"
+
+#include "gimp-intl.h"
+
+
+#define BUFSIZE 4096
+
+
+typedef struct _GimpInterpreterMagic GimpInterpreterMagic;
+
+struct _GimpInterpreterMagic
+{
+  gulong    offset;
+  gchar    *magic;
+  gchar    *mask;
+  guint     size;
+  gchar    *program;
+};
+
+
+static void     gimp_interpreter_db_finalize         (GObject            *object);
+
+static void     gimp_interpreter_db_load_interp_file (GimpInterpreterDB  *db,
+                                                      GFile              *file);
+
+static void     gimp_interpreter_db_add_program      (GimpInterpreterDB  *db,
+                                                      GFile              *file,
+                                                      gchar              *buffer);
+static void     gimp_interpreter_db_add_binfmt_misc  (GimpInterpreterDB  *db,
+                                                      GFile              *file,
+                                                      gchar              *buffer);
+
+static gboolean gimp_interpreter_db_add_extension    (GFile              *file,
+                                                      GimpInterpreterDB  *db,
+                                                      gchar             **tokens);
+static gboolean gimp_interpreter_db_add_magic        (GimpInterpreterDB  *db,
+                                                      gchar             **tokens);
+
+static void     gimp_interpreter_db_clear_magics     (GimpInterpreterDB  *db);
+
+static void     gimp_interpreter_db_resolve_programs (GimpInterpreterDB  *db);
+
+
+G_DEFINE_TYPE (GimpInterpreterDB, gimp_interpreter_db, G_TYPE_OBJECT)
+
+#define parent_class gimp_interpreter_db_parent_class
+
+
+static void
+gimp_interpreter_db_class_init (GimpInterpreterDBClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+
+  object_class->finalize = gimp_interpreter_db_finalize;
+}
+
+static void
+gimp_interpreter_db_init (GimpInterpreterDB *db)
+{
+}
+
+static void
+gimp_interpreter_db_finalize (GObject *object)
+{
+  GimpInterpreterDB *db = GIMP_INTERPRETER_DB (object);
+
+  gimp_interpreter_db_clear (db);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+GimpInterpreterDB *
+gimp_interpreter_db_new (gboolean verbose)
+{
+  GimpInterpreterDB *db = g_object_new (GIMP_TYPE_INTERPRETER_DB, NULL);
+
+  db->verbose = verbose;
+
+  return db;
+}
+
+void
+gimp_interpreter_db_load (GimpInterpreterDB *db,
+                          GList             *path)
+{
+  GList *list;
+
+  g_return_if_fail (GIMP_IS_INTERPRETER_DB (db));
+
+  gimp_interpreter_db_clear (db);
+
+  db->programs = g_hash_table_new_full (g_str_hash, g_str_equal,
+                                        g_free, g_free);
+
+  db->extensions = g_hash_table_new_full (g_str_hash, g_str_equal,
+                                          g_free, g_free);
+
+  db->magic_names = g_hash_table_new_full (g_str_hash, g_str_equal,
+                                           g_free, NULL);
+
+  db->extension_names = g_hash_table_new_full (g_str_hash, g_str_equal,
+                                               g_free, NULL);
+
+  for (list = path; list; list = g_list_next (list))
+    {
+      GFile           *dir = list->data;
+      GFileEnumerator *enumerator;
+
+      enumerator =
+        g_file_enumerate_children (dir,
+                                   G_FILE_ATTRIBUTE_STANDARD_NAME ","
+                                   G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN ","
+                                   G_FILE_ATTRIBUTE_STANDARD_TYPE,
+                                   G_FILE_QUERY_INFO_NONE,
+                                   NULL, NULL);
+
+      if (enumerator)
+        {
+          GFileInfo *info;
+
+          while ((info = g_file_enumerator_next_file (enumerator,
+                                                      NULL, NULL)))
+            {
+              if (! g_file_info_get_is_hidden (info) &&
+                  g_file_info_get_file_type (info) == G_FILE_TYPE_REGULAR)
+                {
+                  GFile *file = g_file_enumerator_get_child (enumerator, info);
+
+                  gimp_interpreter_db_load_interp_file (db, file);
+
+                  g_object_unref (file);
+                }
+
+              g_object_unref (info);
+            }
+
+          g_object_unref (enumerator);
+        }
+    }
+
+  gimp_interpreter_db_resolve_programs (db);
+}
+
+void
+gimp_interpreter_db_clear (GimpInterpreterDB *db)
+{
+  g_return_if_fail (GIMP_IS_INTERPRETER_DB (db));
+
+  if (db->magic_names)
+    {
+      g_hash_table_destroy (db->magic_names);
+      db->magic_names = NULL;
+    }
+
+  if (db->extension_names)
+    {
+      g_hash_table_destroy (db->extension_names);
+      db->extension_names = NULL;
+    }
+
+  if (db->programs)
+    {
+      g_hash_table_destroy (db->programs);
+      db->programs = NULL;
+    }
+
+  if (db->extensions)
+    {
+      g_hash_table_destroy (db->extensions);
+      db->extensions = NULL;
+    }
+
+  gimp_interpreter_db_clear_magics (db);
+}
+
+static void
+gimp_interpreter_db_load_interp_file (GimpInterpreterDB *db,
+                                      GFile             *file)
+{
+  GInputStream     *input;
+  GDataInputStream *data_input;
+  gchar            *buffer;
+  gsize             buffer_len;
+  GError           *error = NULL;
+
+  if (db->verbose)
+    g_print ("Parsing '%s'\n", gimp_file_get_utf8_name (file));
+
+  input = G_INPUT_STREAM (g_file_read (file, NULL, &error));
+  if (! input)
+    {
+      g_message (_("Could not open '%s' for reading: %s"),
+                 gimp_file_get_utf8_name (file),
+                 error->message);
+      g_clear_error (&error);
+      return;
+    }
+
+  data_input = g_data_input_stream_new (input);
+  g_object_unref (input);
+
+  while ((buffer = g_data_input_stream_read_line (data_input, &buffer_len,
+                                                  NULL, &error)))
+    {
+      /* Skip comments */
+      if (buffer[0] == '#')
+        {
+          g_free (buffer);
+          continue;
+        }
+
+      if (g_ascii_isalnum (buffer[0]) || (buffer[0] == '/'))
+        {
+          gimp_interpreter_db_add_program (db, file, buffer);
+        }
+      else if (! g_ascii_isspace (buffer[0]) && (buffer[0] != '\0'))
+        {
+          gimp_interpreter_db_add_binfmt_misc (db, file, buffer);
+        }
+
+      g_free (buffer);
+    }
+
+  if (error)
+    {
+      g_message (_("Error reading '%s': %s"),
+                 gimp_file_get_utf8_name (file),
+                 error->message);
+      g_clear_error (&error);
+    }
+
+  g_object_unref (data_input);
+}
+
+static void
+gimp_interpreter_db_add_program (GimpInterpreterDB  *db,
+                                 GFile              *file,
+                                 gchar              *buffer)
+{
+  gchar *name;
+  gchar *program;
+  gchar *p;
+
+  p = strchr (buffer, '=');
+  if (! p)
+    return;
+
+  *p = '\0';
+
+  name = buffer;
+  program = p + 1;
+  g_strchomp (program);
+
+  if (! g_file_test (program, G_FILE_TEST_IS_EXECUTABLE))
+    {
+      gchar *prog;
+
+      prog = g_find_program_in_path (program);
+      if (! prog || ! g_file_test (prog, G_FILE_TEST_IS_EXECUTABLE))
+        {
+          g_message (_("Bad interpreter referenced in interpreter file %s: %s"),
+                     gimp_file_get_utf8_name (file),
+                     gimp_filename_to_utf8 (program));
+          if (prog)
+            g_free (prog);
+          return;
+        }
+      program = prog;
+    }
+  else
+    program = g_strdup (program);
+
+  if (! g_hash_table_lookup (db->programs, name))
+    g_hash_table_insert (db->programs, g_strdup (name), program);
+}
+
+static void
+gimp_interpreter_db_add_binfmt_misc (GimpInterpreterDB *db,
+                                     GFile             *file,
+                                     gchar             *buffer)
+{
+  gchar **tokens = NULL;
+  gchar  *name, *type, *program;
+  gsize   count;
+  gchar   del[2];
+
+  count = strlen (buffer);
+
+  if ((count < 10) || (count > 255))
+    goto bail;
+
+  buffer = g_strndup (buffer, count + 9);
+
+  del[0] = *buffer;
+  del[1] = '\0';
+
+  memset (buffer + count, del[0], 8);
+
+  tokens = g_strsplit (buffer + 1, del, -1);
+
+  g_free (buffer);
+
+  name    = tokens[0];
+  type    = tokens[1];
+  program = tokens[5];
+
+  if ((name[0] == '\0') || (program[0] == '\0') ||
+      (type[0] == '\0') || (type[1] != '\0'))
+    goto bail;
+
+  switch (type[0])
+    {
+    case 'E':
+      if (! gimp_interpreter_db_add_extension (file, db, tokens))
+        goto bail;
+      break;
+
+    case 'M':
+      if (! gimp_interpreter_db_add_magic (db, tokens))
+        goto bail;
+      break;
+
+    default:
+      goto bail;
+    }
+
+  goto out;
+
+bail:
+  g_message (_("Bad binary format string in interpreter file %s"),
+             gimp_file_get_utf8_name (file));
+
+out:
+  g_strfreev (tokens);
+}
+
+static gboolean
+gimp_interpreter_db_add_extension (GFile              *file,
+                                   GimpInterpreterDB  *db,
+                                   gchar             **tokens)
+{
+  const gchar *name      = tokens[0];
+  const gchar *extension = tokens[3];
+  const gchar *program   = tokens[5];
+
+  if (! g_hash_table_lookup (db->extension_names, name))
+    {
+      gchar *prog;
+
+      if (extension[0] == '\0' || extension[0] == '/')
+        return FALSE;
+
+      if (! g_file_test (program, G_FILE_TEST_IS_EXECUTABLE))
+        {
+          prog = g_find_program_in_path (program);
+          if (! prog || ! g_file_test (prog, G_FILE_TEST_IS_EXECUTABLE))
+            {
+              g_message (_("Bad interpreter referenced in interpreter file %s: %s"),
+                         gimp_file_get_utf8_name (file),
+                         gimp_filename_to_utf8 (program));
+              if (prog)
+                g_free (prog);
+              return FALSE;
+            }
+        }
+      else
+        prog = g_strdup (program);
+
+      g_hash_table_insert (db->extensions, g_strdup (extension), prog);
+      g_hash_table_insert (db->extension_names, g_strdup (name), prog);
+    }
+
+  return TRUE;
+}
+
+static gboolean
+scanarg (const gchar *s)
+{
+  gchar c;
+
+  while ((c = *s++) != '\0')
+    {
+      if (c == '\\' && *s == 'x')
+        {
+          s++;
+
+          if (! g_ascii_isxdigit (*s++))
+            return FALSE;
+
+          if (! g_ascii_isxdigit (*s++))
+            return FALSE;
+        }
+   }
+
+  return TRUE;
+}
+
+static guint
+unquote (gchar *from)
+{
+  gchar *s = from;
+  gchar *p = from;
+  gchar  c;
+
+  while ((c = *s++) != '\0')
+    {
+      if (c == '\\' && *s == 'x')
+        {
+          s++;
+          *p = g_ascii_xdigit_value (*s++) << 4;
+          *p++ |= g_ascii_xdigit_value (*s++);
+          continue;
+        }
+
+      *p++ = c;
+    }
+
+  return p - from;
+}
+
+static gboolean
+gimp_interpreter_db_add_magic (GimpInterpreterDB  *db,
+                               gchar             **tokens)
+{
+  GimpInterpreterMagic *interp_magic;
+  gchar                *name, *num, *magic, *mask, *program;
+  gulong                offset;
+  guint                 size;
+
+  name    = tokens[0];
+  num     = tokens[2];
+  magic   = tokens[3];
+  mask    = tokens[4];
+  program = tokens[5];
+
+  if (! g_hash_table_lookup (db->magic_names, name))
+    {
+      if (num[0] != '\0')
+        {
+          offset = strtoul (num, &num, 10);
+
+          if (num[0] != '\0')
+            return FALSE;
+
+          if (offset > (BUFSIZE / 4))
+            return FALSE;
+        }
+      else
+        {
+          offset = 0;
+        }
+
+      if (! scanarg (magic))
+        return FALSE;
+
+      if (! scanarg (mask))
+        return FALSE;
+
+      size = unquote (magic);
+
+      if ((size + offset) > (BUFSIZE / 2))
+        return FALSE;
+
+      if (mask[0] == '\0')
+        mask = NULL;
+      else if (unquote (mask) != size)
+        return FALSE;
+
+      interp_magic = g_slice_new (GimpInterpreterMagic);
+
+      interp_magic->offset  = offset;
+      interp_magic->magic   = g_memdup (magic, size);
+      interp_magic->mask    = g_memdup (mask, size);
+      interp_magic->size    = size;
+      interp_magic->program = g_strdup (program);
+
+      db->magics = g_slist_append (db->magics, interp_magic);
+
+      g_hash_table_insert (db->magic_names, g_strdup (name), interp_magic);
+    }
+
+  return TRUE;
+}
+
+static void
+gimp_interpreter_db_clear_magics (GimpInterpreterDB *db)
+{
+  GimpInterpreterMagic *magic;
+  GSList               *list, *last;
+
+  list = db->magics;
+  db->magics = NULL;
+
+  while (list)
+    {
+      magic = list->data;
+
+      g_free (magic->magic);
+      g_free (magic->mask);
+      g_free (magic->program);
+
+      g_slice_free (GimpInterpreterMagic, magic);
+
+      last = list;
+      list = list->next;
+
+      g_slist_free_1 (last);
+    }
+}
+
+#ifdef INTERP_DEBUG
+static void
+print_kv (gpointer key,
+          gpointer value,
+          gpointer user_data)
+{
+  g_print ("%s: %s\n", (gchar *) key, (gchar *) value);
+}
+
+static gchar *
+quote (gchar *s,
+       guint  size)
+{
+  GString *d;
+  guint    i;
+
+  if (s == NULL)
+    return "(null)";
+
+  d = g_string_sized_new (size * 4);
+
+  for (i = 0; i < size; i++)
+    g_string_append_printf (d, "\\x%02x", ((guint) s[i]) & 0xff);
+
+  return g_string_free (d, FALSE);
+}
+#endif
+
+static gboolean
+resolve_program (gpointer key,
+                 gpointer value,
+                 gpointer user_data)
+{
+  GimpInterpreterDB *db = user_data;
+  gchar             *program;
+
+  program = g_hash_table_lookup (db->programs, value);
+
+  if (program != NULL)
+    {
+      g_free (value);
+      value = g_strdup (program);
+    }
+
+  g_hash_table_insert (db->extensions, key, value);
+
+  return TRUE;
+}
+
+static void
+gimp_interpreter_db_resolve_programs (GimpInterpreterDB *db)
+{
+  GSList     *list;
+  GHashTable *extensions;
+
+  for (list = db->magics; list; list = list->next)
+    {
+      GimpInterpreterMagic *magic = list->data;
+      const gchar          *program;
+
+      program = g_hash_table_lookup (db->programs, magic->program);
+
+      if (program != NULL)
+        {
+          g_free (magic->program);
+          magic->program = g_strdup (program);
+        }
+    }
+
+  extensions = db->extensions;
+  db->extensions = g_hash_table_new_full (g_str_hash, g_str_equal,
+                                          g_free, g_free);
+
+  g_hash_table_foreach_steal (extensions, resolve_program, db);
+
+  g_hash_table_destroy (extensions);
+
+#ifdef INTERP_DEBUG
+  g_print ("Programs:\n");
+  g_hash_table_foreach (db->programs, print_kv, NULL);
+
+  g_print ("\nExtensions:\n");
+  g_hash_table_foreach (db->extensions, print_kv, NULL);
+
+  g_print ("\nMagics:\n");
+
+  list = db->magics;
+
+  while (list)
+    {
+      GimpInterpreterMagic *magic;
+
+      magic = list->data;
+      g_print ("program: %s, offset: %lu, magic: %s, mask: %s\n",
+               magic->program, magic->offset,
+               quote (magic->magic, magic->size),
+               quote (magic->mask, magic->size));
+
+      list = list->next;
+    }
+
+  g_print ("\n");
+#endif
+}
+
+static gchar *
+resolve_extension (GimpInterpreterDB *db,
+                   const gchar       *program_path)
+{
+  gchar       *filename;
+  gchar       *p;
+  const gchar *program;
+
+  filename = g_path_get_basename (program_path);
+
+  p = strrchr (filename, '.');
+  if (! p)
+    {
+      g_free (filename);
+      return NULL;
+    }
+
+  program = g_hash_table_lookup (db->extensions, p + 1);
+
+  g_free (filename);
+
+  return g_strdup (program);
+}
+
+static gchar *
+resolve_sh_bang (GimpInterpreterDB  *db,
+                 const gchar        *program_path,
+                 gchar              *buffer,
+                 gssize              len,
+                 gchar             **interp_arg)
+{
+  gchar *cp;
+  gchar *name;
+  gchar *program;
+
+  cp = strchr (buffer, '\n');
+  if (! cp)
+    cp = buffer + len - 1;
+
+  *cp = '\0';
+
+  while (cp > buffer)
+    {
+      cp--;
+      if ((*cp == ' ') || (*cp == '\t') || (*cp == '\r'))
+        *cp = '\0';
+      else
+        break;
+    }
+
+  for (cp = buffer + 2; (*cp == ' ') || (*cp == '\t'); cp++);
+
+  if (*cp == '\0')
+    return NULL;
+
+  name = cp;
+
+  for ( ; *cp && (*cp != ' ') && (*cp != '\t'); cp++)
+    /* nothing */ ;
+
+  while ((*cp == ' ') || (*cp == '\t'))
+    *cp++ = '\0';
+
+  if (*cp)
+    {
+      if (strcmp ("/usr/bin/env", name) == 0)
+        {
+          program = g_hash_table_lookup (db->programs, cp);
+
+          if (program)
+            {
+              /* Shift program name and arguments to the right, if and
+               * only if we recorded a specific interpreter for such
+               * script. Otherwise let `env` tool do its job.
+               */
+              name = cp;
+
+              for ( ; *cp && (*cp != ' ') && (*cp != '\t'); cp++)
+                ;
+
+              while ((*cp == ' ') || (*cp == '\t'))
+                *cp++ = '\0';
+            }
+        }
+
+      if (*cp)
+        *interp_arg = g_strdup (cp);
+    }
+
+  program = g_hash_table_lookup (db->programs, name);
+  if (! program)
+    program = name;
+
+  return g_strdup (program);
+}
+
+static gchar *
+resolve_magic (GimpInterpreterDB *db,
+               const gchar       *program_path,
+               gchar             *buffer)
+{
+  GSList                *list;
+  GimpInterpreterMagic  *magic;
+  gchar                 *s;
+  guint                  i;
+
+  list = db->magics;
+
+  while (list)
+    {
+      magic = list->data;
+
+      s = buffer + magic->offset;
+
+      if (magic->mask)
+        {
+          for (i = 0; i < magic->size; i++)
+            if ((*s++ ^ magic->magic[i]) & magic->mask[i])
+              break;
+        }
+      else
+        {
+          for (i = 0; i < magic->size; i++)
+            if ((*s++ ^ magic->magic[i]))
+              break;
+        }
+
+      if (i == magic->size)
+        return g_strdup (magic->program);
+
+      list = list->next;
+    }
+
+  return NULL;
+}
+
+gchar *
+gimp_interpreter_db_resolve (GimpInterpreterDB  *db,
+                             const gchar        *program_path,
+                             gchar             **interp_arg)
+{
+  GFile        *file;
+  GInputStream *input;
+  gchar        *program = NULL;
+
+  g_return_val_if_fail (GIMP_IS_INTERPRETER_DB (db), NULL);
+  g_return_val_if_fail (program_path != NULL, NULL);
+  g_return_val_if_fail (interp_arg != NULL, NULL);
+
+  *interp_arg = NULL;
+
+  file = g_file_new_for_path (program_path);
+  input = G_INPUT_STREAM (g_file_read (file, NULL, NULL));
+  g_object_unref (file);
+
+  if (input)
+    {
+      gsize bytes_read;
+      gchar buffer[BUFSIZE];
+
+      memset (buffer, 0, sizeof (buffer));
+      g_input_stream_read_all (input, buffer,
+                               sizeof (buffer) - 1, /* leave one nul at the end */
+                               &bytes_read, NULL, NULL);
+      g_object_unref (input);
+
+      if (bytes_read)
+        {
+          if (bytes_read > 3 && buffer[0] == '#' && buffer[1] == '!')
+            program = resolve_sh_bang (db, program_path, buffer, bytes_read, interp_arg);
+
+          if (! program)
+            program = resolve_magic (db, program_path, buffer);
+        }
+    }
+
+  if (! program)
+    program = resolve_extension (db, program_path);
+
+  return program;
+}
+
+static void
+collect_extensions (const gchar *ext,
+                    const gchar *program G_GNUC_UNUSED,
+                    GString     *str)
+{
+  if (str->len)
+    g_string_append_c (str, G_SEARCHPATH_SEPARATOR);
+
+  g_string_append_c (str, '.');
+  g_string_append (str, ext);
+}
+
+/**
+ * gimp_interpreter_db_get_extensions:
+ * @db:
+ *
+ * Return value: a newly allocated string with all registered file
+ *               extensions separated by %G_SEARCHPATH_SEPARATOR;
+ *               or %NULL if no extensions are registered
+ **/
+gchar *
+gimp_interpreter_db_get_extensions (GimpInterpreterDB *db)
+{
+  GString *str;
+
+  g_return_val_if_fail (GIMP_IS_INTERPRETER_DB (db), NULL);
+
+  if (g_hash_table_size (db->extensions) == 0)
+    return NULL;
+
+  str = g_string_new (NULL);
+
+  g_hash_table_foreach (db->extensions, (GHFunc) collect_extensions, str);
+
+  return g_string_free (str, FALSE);
+}
diff --git a/app/plug-in/gimpinterpreterdb.h b/app/plug-in/gimpinterpreterdb.h
new file mode 100644
index 0000000..4c77acc
--- /dev/null
+++ b/app/plug-in/gimpinterpreterdb.h
@@ -0,0 +1,70 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpinterpreterdb.h
+ * (C) 2005 Manish Singh <yosh@gimp.org>
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_INTERPRETER_DB_H__
+#define __GIMP_INTERPRETER_DB_H__
+
+
+#define GIMP_TYPE_INTERPRETER_DB            (gimp_interpreter_db_get_type ())
+#define GIMP_INTERPRETER_DB(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_INTERPRETER_DB, GimpInterpreterDB))
+#define GIMP_INTERPRETER_DB_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_INTERPRETER_DB, GimpInterpreterDBClass))
+#define GIMP_IS_INTERPRETER_DB(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_INTERPRETER_DB))
+#define GIMP_IS_INTERPRETER_DB_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_INTERPRETER_DB))
+#define GIMP_INTERPRETER_DB_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_INTERPRETER_DB, GimpInterpreterDBClass))
+
+
+typedef struct _GimpInterpreterDBClass GimpInterpreterDBClass;
+
+struct _GimpInterpreterDB
+{
+  GObject     parent_instance;
+
+  gboolean    verbose;
+
+  GHashTable *programs;
+
+  GSList     *magics;
+  GHashTable *magic_names;
+
+  GHashTable *extensions;
+  GHashTable *extension_names;
+};
+
+struct _GimpInterpreterDBClass
+{
+  GObjectClass  parent_class;
+};
+
+
+GType               gimp_interpreter_db_get_type (void) G_GNUC_CONST;
+GimpInterpreterDB * gimp_interpreter_db_new      (gboolean            verbose);
+
+void                gimp_interpreter_db_load     (GimpInterpreterDB  *db,
+                                                  GList              *path);
+
+void                gimp_interpreter_db_clear    (GimpInterpreterDB  *db);
+
+gchar             * gimp_interpreter_db_resolve  (GimpInterpreterDB  *db,
+                                                  const gchar        *program_path,
+                                                  gchar             **interp_arg);
+gchar       * gimp_interpreter_db_get_extensions (GimpInterpreterDB  *db);
+
+
+#endif /* __GIMP_INTERPRETER_DB_H__ */
diff --git a/app/plug-in/gimpplugin-cleanup.c b/app/plug-in/gimpplugin-cleanup.c
new file mode 100644
index 0000000..96c81d8
--- /dev/null
+++ b/app/plug-in/gimpplugin-cleanup.c
@@ -0,0 +1,578 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugin-cleanup.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "plug-in-types.h"
+
+#include "core/gimp.h"
+#include "core/gimpcontainer.h"
+#include "core/gimpdrawable.h"
+#include "core/gimpdrawable-shadow.h"
+#include "core/gimpimage.h"
+#include "core/gimpimage-undo.h"
+#include "core/gimpundostack.h"
+
+#include "gimpplugin.h"
+#include "gimpplugin-cleanup.h"
+#include "gimppluginmanager.h"
+#include "gimppluginprocedure.h"
+
+#include "gimp-log.h"
+
+
+typedef struct _GimpPlugInCleanupImage GimpPlugInCleanupImage;
+
+struct _GimpPlugInCleanupImage
+{
+  GimpImage *image;
+  gint       image_ID;
+
+  gint       undo_group_count;
+  gint       layers_freeze_count;
+  gint       channels_freeze_count;
+  gint       vectors_freeze_count;
+};
+
+
+typedef struct _GimpPlugInCleanupItem GimpPlugInCleanupItem;
+
+struct _GimpPlugInCleanupItem
+{
+  GimpItem *item;
+  gint      item_ID;
+
+  gboolean  shadow_buffer;
+};
+
+
+/*  local function prototypes  */
+
+static GimpPlugInCleanupImage *
+              gimp_plug_in_cleanup_image_new      (GimpPlugInProcFrame    *proc_frame,
+                                                   GimpImage              *image);
+static void   gimp_plug_in_cleanup_image_free     (GimpPlugInProcFrame    *proc_frame,
+                                                   GimpPlugInCleanupImage *cleanup);
+static gboolean
+              gimp_plug_in_cleanup_image_is_clean (GimpPlugInCleanupImage *cleanup);
+static GimpPlugInCleanupImage *
+              gimp_plug_in_cleanup_image_get      (GimpPlugInProcFrame    *proc_frame,
+                                                   GimpImage              *image);
+static void   gimp_plug_in_cleanup_image          (GimpPlugInProcFrame    *proc_frame,
+                                                   GimpPlugInCleanupImage *cleanup);
+
+static GimpPlugInCleanupItem *
+              gimp_plug_in_cleanup_item_new       (GimpPlugInProcFrame    *proc_frame,
+                                                   GimpItem               *item);
+static void   gimp_plug_in_cleanup_item_free      (GimpPlugInProcFrame    *proc_frame,
+                                                   GimpPlugInCleanupItem  *cleanup);
+static gboolean
+              gimp_plug_in_cleanup_item_is_clean  (GimpPlugInCleanupItem  *cleanup);
+static GimpPlugInCleanupItem *
+              gimp_plug_in_cleanup_item_get       (GimpPlugInProcFrame    *proc_frame,
+                                                   GimpItem               *item);
+static void   gimp_plug_in_cleanup_item           (GimpPlugInProcFrame    *proc_frame,
+                                                   GimpPlugInCleanupItem  *cleanup);
+
+
+/*  public functions  */
+
+gboolean
+gimp_plug_in_cleanup_undo_group_start (GimpPlugIn *plug_in,
+                                       GimpImage  *image)
+{
+  GimpPlugInProcFrame    *proc_frame;
+  GimpPlugInCleanupImage *cleanup;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+  cleanup    = gimp_plug_in_cleanup_image_get (proc_frame, image);
+
+  if (! cleanup)
+    cleanup = gimp_plug_in_cleanup_image_new (proc_frame, image);
+
+  cleanup->undo_group_count++;
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_cleanup_undo_group_end (GimpPlugIn *plug_in,
+                                     GimpImage  *image)
+{
+  GimpPlugInProcFrame    *proc_frame;
+  GimpPlugInCleanupImage *cleanup;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+  cleanup    = gimp_plug_in_cleanup_image_get (proc_frame, image);
+
+  if (! cleanup)
+    return FALSE;
+
+  if (cleanup->undo_group_count > 0)
+    {
+      cleanup->undo_group_count--;
+
+      if (gimp_plug_in_cleanup_image_is_clean (cleanup))
+        gimp_plug_in_cleanup_image_free (proc_frame, cleanup);
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+gboolean
+gimp_plug_in_cleanup_layers_freeze (GimpPlugIn *plug_in,
+                                    GimpImage  *image)
+{
+  GimpPlugInProcFrame    *proc_frame;
+  GimpPlugInCleanupImage *cleanup;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+  cleanup    = gimp_plug_in_cleanup_image_get (proc_frame, image);
+
+  if (! cleanup)
+    cleanup = gimp_plug_in_cleanup_image_new (proc_frame, image);
+
+  cleanup->layers_freeze_count++;
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_cleanup_layers_thaw (GimpPlugIn *plug_in,
+                                  GimpImage  *image)
+{
+  GimpPlugInProcFrame    *proc_frame;
+  GimpPlugInCleanupImage *cleanup;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+  cleanup    = gimp_plug_in_cleanup_image_get (proc_frame, image);
+
+  if (! cleanup)
+    return FALSE;
+
+  if (cleanup->layers_freeze_count > 0)
+    {
+      cleanup->layers_freeze_count--;
+
+      if (gimp_plug_in_cleanup_image_is_clean (cleanup))
+        gimp_plug_in_cleanup_image_free (proc_frame, cleanup);
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+gboolean
+gimp_plug_in_cleanup_channels_freeze (GimpPlugIn *plug_in,
+                                      GimpImage  *image)
+{
+  GimpPlugInProcFrame    *proc_frame;
+  GimpPlugInCleanupImage *cleanup;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+  cleanup    = gimp_plug_in_cleanup_image_get (proc_frame, image);
+
+  if (! cleanup)
+    cleanup = gimp_plug_in_cleanup_image_new (proc_frame, image);
+
+  cleanup->channels_freeze_count++;
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_cleanup_channels_thaw (GimpPlugIn *plug_in,
+                                    GimpImage  *image)
+{
+  GimpPlugInProcFrame    *proc_frame;
+  GimpPlugInCleanupImage *cleanup;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+  cleanup    = gimp_plug_in_cleanup_image_get (proc_frame, image);
+
+  if (! cleanup)
+    return FALSE;
+
+  if (cleanup->channels_freeze_count > 0)
+    {
+      cleanup->channels_freeze_count--;
+
+      if (gimp_plug_in_cleanup_image_is_clean (cleanup))
+        gimp_plug_in_cleanup_image_free (proc_frame, cleanup);
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+gboolean
+gimp_plug_in_cleanup_vectors_freeze (GimpPlugIn *plug_in,
+                                     GimpImage  *image)
+{
+  GimpPlugInProcFrame    *proc_frame;
+  GimpPlugInCleanupImage *cleanup;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+  cleanup    = gimp_plug_in_cleanup_image_get (proc_frame, image);
+
+  if (! cleanup)
+    cleanup = gimp_plug_in_cleanup_image_new (proc_frame, image);
+
+  cleanup->vectors_freeze_count++;
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_cleanup_vectors_thaw (GimpPlugIn *plug_in,
+                                   GimpImage  *image)
+{
+  GimpPlugInProcFrame    *proc_frame;
+  GimpPlugInCleanupImage *cleanup;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+  cleanup    = gimp_plug_in_cleanup_image_get (proc_frame, image);
+
+  if (! cleanup)
+    return FALSE;
+
+  if (cleanup->vectors_freeze_count > 0)
+    {
+      cleanup->vectors_freeze_count--;
+
+      if (gimp_plug_in_cleanup_image_is_clean (cleanup))
+        gimp_plug_in_cleanup_image_free (proc_frame, cleanup);
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+gboolean
+gimp_plug_in_cleanup_add_shadow (GimpPlugIn   *plug_in,
+                                 GimpDrawable *drawable)
+{
+  GimpPlugInProcFrame   *proc_frame;
+  GimpPlugInCleanupItem *cleanup;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+  cleanup    = gimp_plug_in_cleanup_item_get (proc_frame, GIMP_ITEM (drawable));
+
+  if (! cleanup)
+    cleanup = gimp_plug_in_cleanup_item_new (proc_frame, GIMP_ITEM (drawable));
+
+  cleanup->shadow_buffer = TRUE;
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_cleanup_remove_shadow (GimpPlugIn   *plug_in,
+                                    GimpDrawable *drawable)
+{
+  GimpPlugInProcFrame   *proc_frame;
+  GimpPlugInCleanupItem *cleanup;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+  cleanup    = gimp_plug_in_cleanup_item_get (proc_frame, GIMP_ITEM (drawable));
+
+  if (! cleanup)
+    return FALSE;
+
+  if (cleanup->shadow_buffer)
+    {
+      cleanup->shadow_buffer = FALSE;
+
+      if (gimp_plug_in_cleanup_item_is_clean (cleanup))
+        gimp_plug_in_cleanup_item_free (proc_frame, cleanup);
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+void
+gimp_plug_in_cleanup (GimpPlugIn          *plug_in,
+                      GimpPlugInProcFrame *proc_frame)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+  g_return_if_fail (proc_frame != NULL);
+
+  while (proc_frame->image_cleanups)
+    {
+      GimpPlugInCleanupImage *cleanup = proc_frame->image_cleanups->data;
+
+      if (gimp_image_get_by_ID (plug_in->manager->gimp,
+                                cleanup->image_ID) == cleanup->image)
+        {
+          gimp_plug_in_cleanup_image (proc_frame, cleanup);
+        }
+
+      gimp_plug_in_cleanup_image_free (proc_frame, cleanup);
+    }
+
+  while (proc_frame->item_cleanups)
+    {
+      GimpPlugInCleanupItem *cleanup = proc_frame->item_cleanups->data;
+
+      if (gimp_item_get_by_ID (plug_in->manager->gimp,
+                               cleanup->item_ID) == cleanup->item)
+        {
+          gimp_plug_in_cleanup_item (proc_frame, cleanup);
+        }
+
+      gimp_plug_in_cleanup_item_free (proc_frame, cleanup);
+    }
+}
+
+
+/*  private functions  */
+
+static GimpPlugInCleanupImage *
+gimp_plug_in_cleanup_image_new (GimpPlugInProcFrame *proc_frame,
+                                GimpImage           *image)
+{
+  GimpPlugInCleanupImage *cleanup = g_slice_new0 (GimpPlugInCleanupImage);
+
+  cleanup->image    = image;
+  cleanup->image_ID = gimp_image_get_ID (image);
+
+  proc_frame->image_cleanups = g_list_prepend (proc_frame->image_cleanups,
+                                               cleanup);
+
+  return cleanup;
+}
+
+static void
+gimp_plug_in_cleanup_image_free (GimpPlugInProcFrame    *proc_frame,
+                                 GimpPlugInCleanupImage *cleanup)
+{
+  proc_frame->image_cleanups = g_list_remove (proc_frame->image_cleanups,
+                                              cleanup);
+
+  g_slice_free (GimpPlugInCleanupImage, cleanup);
+}
+
+static gboolean
+gimp_plug_in_cleanup_image_is_clean (GimpPlugInCleanupImage *cleanup)
+{
+  if (cleanup->undo_group_count > 0)
+    return FALSE;
+
+  if (cleanup->layers_freeze_count > 0)
+    return FALSE;
+
+  if (cleanup->channels_freeze_count > 0)
+    return FALSE;
+
+  if (cleanup->vectors_freeze_count > 0)
+    return FALSE;
+
+  return TRUE;
+}
+
+static GimpPlugInCleanupImage *
+gimp_plug_in_cleanup_image_get (GimpPlugInProcFrame *proc_frame,
+                                GimpImage           *image)
+{
+  GList *list;
+
+  for (list = proc_frame->image_cleanups; list; list = g_list_next (list))
+    {
+      GimpPlugInCleanupImage *cleanup = list->data;
+
+      if (cleanup->image == image)
+        return cleanup;
+    }
+
+  return NULL;
+}
+
+static void
+gimp_plug_in_cleanup_image (GimpPlugInProcFrame    *proc_frame,
+                            GimpPlugInCleanupImage *cleanup)
+{
+  GimpImage     *image = cleanup->image;
+  GimpContainer *container;
+
+  if (cleanup->undo_group_count > 0)
+    {
+      g_message ("Plug-in '%s' left image undo in inconsistent state, "
+                 "closing open undo groups.",
+                 gimp_procedure_get_label (proc_frame->procedure));
+
+      while (cleanup->undo_group_count--)
+        if (! gimp_image_undo_group_end (image))
+          break;
+    }
+
+  container = gimp_image_get_layers (image);
+
+  if (cleanup->layers_freeze_count > 0)
+    {
+      g_message ("Plug-in '%s' left image's layers frozen, "
+                 "thawing layers.",
+                 gimp_procedure_get_label (proc_frame->procedure));
+
+      while (cleanup->layers_freeze_count-- > 0 &&
+             gimp_container_frozen (container))
+        {
+          gimp_container_thaw (container);
+        }
+    }
+
+  container = gimp_image_get_channels (image);
+
+  if (cleanup->channels_freeze_count > 0)
+    {
+      g_message ("Plug-in '%s' left image's channels frozen, "
+                 "thawing channels.",
+                 gimp_procedure_get_label (proc_frame->procedure));
+
+      while (cleanup->channels_freeze_count-- > 0 &&
+             gimp_container_frozen (container))
+        {
+          gimp_container_thaw (container);
+        }
+    }
+
+  container = gimp_image_get_vectors (image);
+
+  if (cleanup->vectors_freeze_count > 0)
+    {
+      g_message ("Plug-in '%s' left image's vectors frozen, "
+                 "thawing vectors.",
+                 gimp_procedure_get_label (proc_frame->procedure));
+
+      while (cleanup->vectors_freeze_count > 0 &&
+             gimp_container_frozen (container))
+        {
+          gimp_container_thaw (container);
+        }
+    }
+}
+
+static GimpPlugInCleanupItem *
+gimp_plug_in_cleanup_item_new (GimpPlugInProcFrame *proc_frame,
+                               GimpItem            *item)
+{
+  GimpPlugInCleanupItem *cleanup = g_slice_new0 (GimpPlugInCleanupItem);
+
+  cleanup->item    = item;
+  cleanup->item_ID = gimp_item_get_ID (item);
+
+  proc_frame->item_cleanups = g_list_prepend (proc_frame->item_cleanups,
+                                              cleanup);
+
+  return cleanup;
+}
+
+static void
+gimp_plug_in_cleanup_item_free (GimpPlugInProcFrame   *proc_frame,
+                                GimpPlugInCleanupItem *cleanup)
+{
+  proc_frame->item_cleanups = g_list_remove (proc_frame->item_cleanups,
+                                             cleanup);
+
+  g_slice_free (GimpPlugInCleanupItem, cleanup);
+}
+
+static gboolean
+gimp_plug_in_cleanup_item_is_clean (GimpPlugInCleanupItem *cleanup)
+{
+  if (cleanup->shadow_buffer)
+    return FALSE;
+
+  return TRUE;
+}
+
+static GimpPlugInCleanupItem *
+gimp_plug_in_cleanup_item_get (GimpPlugInProcFrame *proc_frame,
+                               GimpItem            *item)
+{
+  GList *list;
+
+  for (list = proc_frame->item_cleanups; list; list = g_list_next (list))
+    {
+      GimpPlugInCleanupItem *cleanup = list->data;
+
+      if (cleanup->item == item)
+        return cleanup;
+    }
+
+  return NULL;
+}
+
+static void
+gimp_plug_in_cleanup_item (GimpPlugInProcFrame   *proc_frame,
+                           GimpPlugInCleanupItem *cleanup)
+{
+  GimpItem *item = cleanup->item;
+
+  if (cleanup->shadow_buffer)
+    {
+      GIMP_LOG (SHADOW_TILES,
+                "Freeing shadow buffer of drawable '%s' on behalf of '%s'.",
+                gimp_object_get_name (item),
+                gimp_procedure_get_label (proc_frame->procedure));
+
+      gimp_drawable_free_shadow_buffer (GIMP_DRAWABLE (item));
+
+      cleanup->shadow_buffer = FALSE;
+    }
+}
diff --git a/app/plug-in/gimpplugin-cleanup.h b/app/plug-in/gimpplugin-cleanup.h
new file mode 100644
index 0000000..cb3b22d
--- /dev/null
+++ b/app/plug-in/gimpplugin-cleanup.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugin-cleanup.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_CLEANUP_H__
+#define __GIMP_PLUG_IN_CLEANUP_H__
+
+
+gboolean   gimp_plug_in_cleanup_undo_group_start (GimpPlugIn          *plug_in,
+                                                  GimpImage           *image);
+gboolean   gimp_plug_in_cleanup_undo_group_end   (GimpPlugIn          *plug_in,
+                                                  GimpImage           *image);
+
+gboolean   gimp_plug_in_cleanup_layers_freeze    (GimpPlugIn          *plug_in,
+                                                  GimpImage           *image);
+gboolean   gimp_plug_in_cleanup_layers_thaw      (GimpPlugIn          *plug_in,
+                                                  GimpImage           *image);
+
+gboolean   gimp_plug_in_cleanup_channels_freeze  (GimpPlugIn          *plug_in,
+                                                  GimpImage           *image);
+gboolean   gimp_plug_in_cleanup_channels_thaw    (GimpPlugIn          *plug_in,
+                                                  GimpImage           *image);
+
+gboolean   gimp_plug_in_cleanup_vectors_freeze   (GimpPlugIn          *plug_in,
+                                                  GimpImage           *image);
+gboolean   gimp_plug_in_cleanup_vectors_thaw     (GimpPlugIn          *plug_in,
+                                                  GimpImage           *image);
+
+gboolean   gimp_plug_in_cleanup_add_shadow       (GimpPlugIn          *plug_in,
+                                                  GimpDrawable        *drawable);
+gboolean   gimp_plug_in_cleanup_remove_shadow    (GimpPlugIn          *plug_in,
+                                                  GimpDrawable        *drawable);
+
+void       gimp_plug_in_cleanup                  (GimpPlugIn          *plug_in,
+                                                  GimpPlugInProcFrame *proc_frame);
+
+
+#endif /* __GIMP_PLUG_IN_CLEANUP_H__ */
diff --git a/app/plug-in/gimpplugin-context.c b/app/plug-in/gimpplugin-context.c
new file mode 100644
index 0000000..6817695
--- /dev/null
+++ b/app/plug-in/gimpplugin-context.c
@@ -0,0 +1,81 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugin-context.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "plug-in-types.h"
+
+#include "core/gimp.h"
+
+#include "pdb/gimppdbcontext.h"
+
+#include "gimpplugin.h"
+#include "gimpplugin-context.h"
+#include "gimppluginmanager.h"
+
+
+gboolean
+gimp_plug_in_context_push (GimpPlugIn *plug_in)
+{
+  GimpPlugInProcFrame *proc_frame;
+  GimpContext         *parent;
+  GimpContext         *context;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  if (proc_frame->context_stack)
+    parent = proc_frame->context_stack->data;
+  else
+    parent = proc_frame->main_context;
+
+  context = gimp_pdb_context_new (plug_in->manager->gimp, parent, FALSE);
+
+  proc_frame->context_stack = g_list_prepend (proc_frame->context_stack,
+                                              context);
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_context_pop (GimpPlugIn *plug_in)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  if (proc_frame->context_stack)
+    {
+      GimpContext *context = proc_frame->context_stack->data;
+
+      proc_frame->context_stack = g_list_remove (proc_frame->context_stack,
+                                                 context);
+      g_object_unref (context);
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
diff --git a/app/plug-in/gimpplugin-context.h b/app/plug-in/gimpplugin-context.h
new file mode 100644
index 0000000..8e46a20
--- /dev/null
+++ b/app/plug-in/gimpplugin-context.h
@@ -0,0 +1,28 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugin-context.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_CONTEXT_H__
+#define __GIMP_PLUG_IN_CONTEXT_H__
+
+
+gboolean  gimp_plug_in_context_push (GimpPlugIn *plug_in);
+gboolean  gimp_plug_in_context_pop  (GimpPlugIn *plug_in);
+
+
+#endif /* __GIMP_PLUG_IN_CONTEXT_H__ */
diff --git a/app/plug-in/gimpplugin-message.c b/app/plug-in/gimpplugin-message.c
new file mode 100644
index 0000000..b27035e
--- /dev/null
+++ b/app/plug-in/gimpplugin-message.c
@@ -0,0 +1,1063 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugin-message.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpbase/gimpprotocol.h"
+#include "libgimpbase/gimpwire.h"
+
+#include "plug-in-types.h"
+
+#include "gegl/gimp-babl.h"
+#include "gegl/gimp-babl-compat.h"
+#include "gegl/gimp-gegl-tile-compat.h"
+
+#include "core/gimp.h"
+#include "core/gimpdrawable.h"
+#include "core/gimpdrawable-shadow.h"
+
+#include "pdb/gimp-pdb-compat.h"
+#include "pdb/gimppdb.h"
+#include "pdb/gimppdberror.h"
+
+#include "gimpplugin.h"
+#include "gimpplugin-cleanup.h"
+#include "gimpplugin-message.h"
+#include "gimppluginmanager.h"
+#include "gimpplugindef.h"
+#include "gimppluginshm.h"
+#include "gimptemporaryprocedure.h"
+#include "plug-in-params.h"
+
+#include "gimp-intl.h"
+
+
+/*  local function prototypes  */
+
+static void gimp_plug_in_handle_quit             (GimpPlugIn      *plug_in);
+static void gimp_plug_in_handle_tile_request     (GimpPlugIn      *plug_in,
+                                                  GPTileReq       *request);
+static void gimp_plug_in_handle_tile_put         (GimpPlugIn      *plug_in,
+                                                  GPTileReq       *request);
+static void gimp_plug_in_handle_tile_get         (GimpPlugIn      *plug_in,
+                                                  GPTileReq       *request);
+static void gimp_plug_in_handle_proc_run         (GimpPlugIn      *plug_in,
+                                                  GPProcRun       *proc_run);
+static void gimp_plug_in_handle_proc_return      (GimpPlugIn      *plug_in,
+                                                  GPProcReturn    *proc_return);
+static void gimp_plug_in_handle_temp_proc_return (GimpPlugIn      *plug_in,
+                                                  GPProcReturn    *proc_return);
+static void gimp_plug_in_handle_proc_install     (GimpPlugIn      *plug_in,
+                                                  GPProcInstall   *proc_install);
+static void gimp_plug_in_handle_proc_uninstall   (GimpPlugIn      *plug_in,
+                                                  GPProcUninstall *proc_uninstall);
+static void gimp_plug_in_handle_extension_ack    (GimpPlugIn      *plug_in);
+static void gimp_plug_in_handle_has_init         (GimpPlugIn      *plug_in);
+
+
+/*  public functions  */
+
+void
+gimp_plug_in_handle_message (GimpPlugIn      *plug_in,
+                             GimpWireMessage *msg)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+  g_return_if_fail (plug_in->open == TRUE);
+  g_return_if_fail (msg != NULL);
+
+  switch (msg->type)
+    {
+    case GP_QUIT:
+      gimp_plug_in_handle_quit (plug_in);
+      break;
+
+    case GP_CONFIG:
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "sent a CONFIG message.  This should not happen.",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file));
+      gimp_plug_in_close (plug_in, TRUE);
+      break;
+
+    case GP_TILE_REQ:
+      gimp_plug_in_handle_tile_request (plug_in, msg->data);
+      break;
+
+    case GP_TILE_ACK:
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "sent a TILE_ACK message.  This should not happen.",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file));
+      gimp_plug_in_close (plug_in, TRUE);
+      break;
+
+    case GP_TILE_DATA:
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "sent a TILE_DATA message.  This should not happen.",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file));
+      gimp_plug_in_close (plug_in, TRUE);
+      break;
+
+    case GP_PROC_RUN:
+      gimp_plug_in_handle_proc_run (plug_in, msg->data);
+      break;
+
+    case GP_PROC_RETURN:
+      gimp_plug_in_handle_proc_return (plug_in, msg->data);
+      break;
+
+    case GP_TEMP_PROC_RUN:
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "sent a TEMP_PROC_RUN message.  This should not happen.",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file));
+      gimp_plug_in_close (plug_in, TRUE);
+      break;
+
+    case GP_TEMP_PROC_RETURN:
+      gimp_plug_in_handle_temp_proc_return (plug_in, msg->data);
+      break;
+
+    case GP_PROC_INSTALL:
+      gimp_plug_in_handle_proc_install (plug_in, msg->data);
+      break;
+
+    case GP_PROC_UNINSTALL:
+      gimp_plug_in_handle_proc_uninstall (plug_in, msg->data);
+      break;
+
+    case GP_EXTENSION_ACK:
+      gimp_plug_in_handle_extension_ack (plug_in);
+      break;
+
+    case GP_HAS_INIT:
+      gimp_plug_in_handle_has_init (plug_in);
+      break;
+    }
+}
+
+
+/*  private functions  */
+
+static void
+gimp_plug_in_handle_quit (GimpPlugIn *plug_in)
+{
+  gimp_plug_in_close (plug_in, FALSE);
+}
+
+static void
+gimp_plug_in_handle_tile_request (GimpPlugIn *plug_in,
+                                  GPTileReq  *request)
+{
+  g_return_if_fail (request != NULL);
+
+  if (request->drawable_ID == -1)
+    gimp_plug_in_handle_tile_put (plug_in, request);
+  else
+    gimp_plug_in_handle_tile_get (plug_in, request);
+}
+
+static void
+gimp_plug_in_handle_tile_put (GimpPlugIn *plug_in,
+                              GPTileReq  *request)
+{
+  GPTileData       tile_data;
+  GPTileData      *tile_info;
+  GimpWireMessage  msg;
+  GimpDrawable    *drawable;
+  GeglBuffer      *buffer;
+  const Babl      *format;
+  GeglRectangle    tile_rect;
+
+  tile_data.drawable_ID = -1;
+  tile_data.tile_num    = 0;
+  tile_data.shadow      = 0;
+  tile_data.bpp         = 0;
+  tile_data.width       = 0;
+  tile_data.height      = 0;
+  tile_data.use_shm     = (plug_in->manager->shm != NULL);
+  tile_data.data        = NULL;
+
+  if (! gp_tile_data_write (plug_in->my_write, &tile_data, plug_in))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "%s: ERROR", G_STRFUNC);
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+
+  if (! gimp_wire_read_msg (plug_in->my_read, &msg, plug_in))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "%s: ERROR", G_STRFUNC);
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+
+  if (msg.type != GP_TILE_DATA)
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "expected tile data and received: %d", msg.type);
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+
+  tile_info = msg.data;
+
+  drawable = (GimpDrawable *) gimp_item_get_by_ID (plug_in->manager->gimp,
+                                                   tile_info->drawable_ID);
+
+  if (! GIMP_IS_DRAWABLE (drawable))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "tried writing to invalid drawable %d (killing)",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file),
+                    tile_info->drawable_ID);
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+  else if (gimp_item_is_removed (GIMP_ITEM (drawable)))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "tried writing to drawable %d which was removed "
+                    "from the image (killing)",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file),
+                    tile_info->drawable_ID);
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+
+  if (tile_info->shadow)
+    {
+
+      /*  don't check whether the drawable is a group or locked here,
+       *  the plugin will get a proper error message when it tries to
+       *  merge the shadow tiles, which is much better than just
+       *  killing it.
+       */
+      buffer = gimp_drawable_get_shadow_buffer (drawable);
+
+      gimp_plug_in_cleanup_add_shadow (plug_in, drawable);
+    }
+  else
+    {
+      if (gimp_item_is_content_locked (GIMP_ITEM (drawable)))
+        {
+          gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                        "Plug-in \"%s\"\n(%s)\n\n"
+                        "tried writing to a locked drawable %d (killing)",
+                        gimp_object_get_name (plug_in),
+                        gimp_file_get_utf8_name (plug_in->file),
+                        tile_info->drawable_ID);
+          gimp_plug_in_close (plug_in, TRUE);
+          return;
+        }
+      else if (gimp_viewable_get_children (GIMP_VIEWABLE (drawable)))
+        {
+          gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                        "Plug-in \"%s\"\n(%s)\n\n"
+                        "tried writing to a group layer %d (killing)",
+                        gimp_object_get_name (plug_in),
+                        gimp_file_get_utf8_name (plug_in->file),
+                        tile_info->drawable_ID);
+          gimp_plug_in_close (plug_in, TRUE);
+          return;
+        }
+
+      buffer = gimp_drawable_get_buffer (drawable);
+    }
+
+  if (! gimp_gegl_buffer_get_tile_rect (buffer,
+                                        GIMP_PLUG_IN_TILE_WIDTH,
+                                        GIMP_PLUG_IN_TILE_HEIGHT,
+                                        tile_info->tile_num,
+                                        &tile_rect))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "requested invalid tile (killing)",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file));
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+
+  format = gegl_buffer_get_format (buffer);
+
+  if (! gimp_plug_in_precision_enabled (plug_in))
+    {
+      format = gimp_babl_compat_u8_format (format);
+    }
+
+  if (tile_data.use_shm)
+    {
+      gegl_buffer_set (buffer, &tile_rect, 0, format,
+                       gimp_plug_in_shm_get_addr (plug_in->manager->shm),
+                       GEGL_AUTO_ROWSTRIDE);
+    }
+  else
+    {
+      gegl_buffer_set (buffer, &tile_rect, 0, format,
+                       tile_info->data,
+                       GEGL_AUTO_ROWSTRIDE);
+    }
+
+  gimp_wire_destroy (&msg);
+
+  if (! gp_tile_ack_write (plug_in->my_write, plug_in))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "%s: ERROR", G_STRFUNC);
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+}
+
+static void
+gimp_plug_in_handle_tile_get (GimpPlugIn *plug_in,
+                              GPTileReq  *request)
+{
+  GPTileData       tile_data;
+  GimpWireMessage  msg;
+  GimpDrawable    *drawable;
+  GeglBuffer      *buffer;
+  const Babl      *format;
+  GeglRectangle    tile_rect;
+  gint             tile_size;
+
+  drawable = (GimpDrawable *) gimp_item_get_by_ID (plug_in->manager->gimp,
+                                                   request->drawable_ID);
+
+  if (! GIMP_IS_DRAWABLE (drawable))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "tried reading from invalid drawable %d (killing)",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file),
+                    request->drawable_ID);
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+  else if (gimp_item_is_removed (GIMP_ITEM (drawable)))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "tried reading from drawable %d which was removed "
+                    "from the image (killing)",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file),
+                    request->drawable_ID);
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+
+  if (request->shadow)
+    {
+      buffer = gimp_drawable_get_shadow_buffer (drawable);
+
+      gimp_plug_in_cleanup_add_shadow (plug_in, drawable);
+    }
+  else
+    {
+      buffer = gimp_drawable_get_buffer (drawable);
+    }
+
+  if (! gimp_gegl_buffer_get_tile_rect (buffer,
+                                        GIMP_PLUG_IN_TILE_WIDTH,
+                                        GIMP_PLUG_IN_TILE_HEIGHT,
+                                        request->tile_num,
+                                        &tile_rect))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "requested invalid tile (killing)",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file));
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+
+  format = gegl_buffer_get_format (buffer);
+
+  if (! gimp_plug_in_precision_enabled (plug_in))
+    {
+      format = gimp_babl_compat_u8_format (format);
+    }
+
+  tile_size = (babl_format_get_bytes_per_pixel (format) *
+               tile_rect.width * tile_rect.height);
+
+  tile_data.drawable_ID = request->drawable_ID;
+  tile_data.tile_num    = request->tile_num;
+  tile_data.shadow      = request->shadow;
+  tile_data.bpp         = babl_format_get_bytes_per_pixel (format);
+  tile_data.width       = tile_rect.width;
+  tile_data.height      = tile_rect.height;
+  tile_data.use_shm     = (plug_in->manager->shm != NULL);
+
+  if (tile_data.use_shm)
+    {
+      gegl_buffer_get (buffer, &tile_rect, 1.0, format,
+                       gimp_plug_in_shm_get_addr (plug_in->manager->shm),
+                       GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+    }
+  else
+    {
+      tile_data.data = g_malloc (tile_size);
+
+      gegl_buffer_get (buffer, &tile_rect, 1.0, format,
+                       tile_data.data,
+                       GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+    }
+
+  if (! gp_tile_data_write (plug_in->my_write, &tile_data, plug_in))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "%s: ERROR", G_STRFUNC);
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+
+  if (! gimp_wire_read_msg (plug_in->my_read, &msg, plug_in))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "%s: ERROR", G_STRFUNC);
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+
+  if (msg.type != GP_TILE_ACK)
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "expected tile ack and received: %d", msg.type);
+      gimp_plug_in_close (plug_in, TRUE);
+      return;
+    }
+
+  gimp_wire_destroy (&msg);
+}
+
+static void
+gimp_plug_in_handle_proc_error (GimpPlugIn          *plug_in,
+                                GimpPlugInProcFrame *proc_frame,
+                                const gchar         *name,
+                                const GError        *error)
+{
+  switch (proc_frame->error_handler)
+    {
+    case GIMP_PDB_ERROR_HANDLER_INTERNAL:
+      if (error->domain == GIMP_PDB_ERROR)
+        {
+          gimp_message (plug_in->manager->gimp,
+                        G_OBJECT (proc_frame->progress),
+                        GIMP_MESSAGE_ERROR,
+                        _("Calling error for procedure '%s':\n"
+                          "%s"),
+                        name, error->message);
+        }
+      else
+        {
+          gimp_message (plug_in->manager->gimp,
+                        G_OBJECT (proc_frame->progress),
+                        GIMP_MESSAGE_ERROR,
+                        _("Execution error for procedure '%s':\n"
+                          "%s"),
+                        name, error->message);
+        }
+      break;
+
+    case GIMP_PDB_ERROR_HANDLER_PLUGIN:
+      /*  the plug-in is responsible for handling this error  */
+      break;
+    }
+}
+
+static void
+gimp_plug_in_handle_proc_run (GimpPlugIn *plug_in,
+                              GPProcRun  *proc_run)
+{
+  GimpPlugInProcFrame *proc_frame;
+  gchar               *canonical;
+  const gchar         *proc_name   = NULL;
+  GimpProcedure       *procedure;
+  GimpValueArray      *args        = NULL;
+  GimpValueArray      *return_vals = NULL;
+  GError              *error       = NULL;
+
+  g_return_if_fail (proc_run != NULL);
+  g_return_if_fail (proc_run->name != NULL);
+
+  canonical = gimp_canonicalize_identifier (proc_run->name);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  procedure = gimp_pdb_lookup_procedure (plug_in->manager->gimp->pdb,
+                                         canonical);
+
+  if (! procedure)
+    {
+      proc_name = gimp_pdb_lookup_compat_proc_name (plug_in->manager->gimp->pdb,
+                                                    canonical);
+
+      if (proc_name)
+        {
+          procedure = gimp_pdb_lookup_procedure (plug_in->manager->gimp->pdb,
+                                                 proc_name);
+
+          if (plug_in->manager->gimp->pdb_compat_mode == GIMP_PDB_COMPAT_WARN)
+            {
+              gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_WARNING,
+                            "Plug-in \"%s\"\n(%s)\n"
+                            "called deprecated procedure '%s'.\n"
+                            "It should call '%s' instead!",
+                            gimp_object_get_name (plug_in),
+                            gimp_file_get_utf8_name (plug_in->file),
+                            canonical, proc_name);
+            }
+        }
+    }
+  else if (procedure->deprecated)
+    {
+      if (plug_in->manager->gimp->pdb_compat_mode == GIMP_PDB_COMPAT_WARN)
+        {
+          if (! strcmp (procedure->deprecated, "NONE"))
+            {
+              gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_WARNING,
+                            "Plug-in \"%s\"\n(%s)\n"
+                            "called deprecated procedure '%s'.",
+                            gimp_object_get_name (plug_in),
+                            gimp_file_get_utf8_name (plug_in->file),
+                            canonical);
+            }
+          else
+            {
+              gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_WARNING,
+                            "WARNING: Plug-in \"%s\"\n(%s)\n"
+                            "called deprecated procedure '%s'.\n"
+                            "It should call '%s' instead!",
+                            gimp_object_get_name (plug_in),
+                            gimp_file_get_utf8_name (plug_in->file),
+                            canonical, procedure->deprecated);
+            }
+        }
+    }
+
+  if (! proc_name)
+    proc_name = canonical;
+
+  args = plug_in_params_to_args (procedure ? procedure->args     : NULL,
+                                 procedure ? procedure->num_args : 0,
+                                 proc_run->params, proc_run->nparams,
+                                 FALSE, FALSE);
+
+  /*  Execute the procedure even if gimp_pdb_lookup_procedure()
+   *  returned NULL, gimp_pdb_execute_procedure_by_name_args() will
+   *  return appropriate error return_vals.
+   */
+  gimp_plug_in_manager_plug_in_push (plug_in->manager, plug_in);
+  return_vals = gimp_pdb_execute_procedure_by_name_args (plug_in->manager->gimp->pdb,
+                                                         proc_frame->context_stack ?
+                                                         proc_frame->context_stack->data :
+                                                         proc_frame->main_context,
+                                                         proc_frame->progress,
+                                                         &error,
+                                                         proc_name,
+                                                         args);
+  gimp_plug_in_manager_plug_in_pop (plug_in->manager);
+
+  gimp_value_array_unref (args);
+
+  if (error)
+    {
+      gimp_plug_in_handle_proc_error (plug_in, proc_frame,
+                                      canonical, error);
+      g_error_free (error);
+    }
+
+  g_free (canonical);
+
+  /*  Don't bother to send the return value if executing the procedure
+   *  closed the plug-in (e.g. if the procedure is gimp-quit)
+   */
+  if (plug_in->open)
+    {
+      GPProcReturn proc_return;
+
+      /*  Return the name we got called with, *not* proc_name or canonical,
+       *  since proc_name may have been remapped by gimp->procedural_compat_ht
+       *  and canonical may be different too.
+       */
+      proc_return.name    = proc_run->name;
+      proc_return.nparams = gimp_value_array_length (return_vals);
+      proc_return.params  = plug_in_args_to_params (return_vals, FALSE);
+
+      if (! gp_proc_return_write (plug_in->my_write, &proc_return, plug_in))
+        {
+          gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                        "%s: ERROR", G_STRFUNC);
+          gimp_plug_in_close (plug_in, TRUE);
+        }
+
+      g_free (proc_return.params);
+    }
+
+  gimp_value_array_unref (return_vals);
+}
+
+static void
+gimp_plug_in_handle_proc_return (GimpPlugIn   *plug_in,
+                                 GPProcReturn *proc_return)
+{
+  GimpPlugInProcFrame *proc_frame = &plug_in->main_proc_frame;
+
+  g_return_if_fail (proc_return != NULL);
+
+  proc_frame->return_vals =
+    plug_in_params_to_args (proc_frame->procedure->values,
+                            proc_frame->procedure->num_values,
+                            proc_return->params,
+                            proc_return->nparams,
+                            TRUE, TRUE);
+
+  if (proc_frame->main_loop)
+    {
+      g_main_loop_quit (proc_frame->main_loop);
+    }
+  else
+    {
+      /*  the plug-in is run asynchronously, so display its error
+       *  messages here because nobody else will do it
+       */
+      gimp_plug_in_procedure_handle_return_values (GIMP_PLUG_IN_PROCEDURE (proc_frame->procedure),
+                                                   plug_in->manager->gimp,
+                                                   proc_frame->progress,
+                                                   proc_frame->return_vals);
+    }
+
+  gimp_plug_in_close (plug_in, FALSE);
+}
+
+static void
+gimp_plug_in_handle_temp_proc_return (GimpPlugIn   *plug_in,
+                                      GPProcReturn *proc_return)
+{
+  g_return_if_fail (proc_return != NULL);
+
+  if (plug_in->temp_proc_frames)
+    {
+      GimpPlugInProcFrame *proc_frame = plug_in->temp_proc_frames->data;
+
+      proc_frame->return_vals =
+        plug_in_params_to_args (proc_frame->procedure->values,
+                                proc_frame->procedure->num_values,
+                                proc_return->params,
+                                proc_return->nparams,
+                                TRUE, TRUE);
+
+      gimp_plug_in_main_loop_quit (plug_in);
+      gimp_plug_in_proc_frame_pop (plug_in);
+    }
+  else
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "sent a TEMP_PROC_RETURN message while not running "
+                    "a temporary procedure.  This should not happen.",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file));
+      gimp_plug_in_close (plug_in, TRUE);
+    }
+}
+
+static void
+gimp_plug_in_handle_proc_install (GimpPlugIn    *plug_in,
+                                  GPProcInstall *proc_install)
+{
+  GimpPlugInProcedure *proc       = NULL;
+  GimpProcedure       *procedure  = NULL;
+  gchar               *canonical;
+  gboolean             null_name  = FALSE;
+  gboolean             valid_utf8 = FALSE;
+  gint                 i;
+
+  g_return_if_fail (proc_install != NULL);
+  g_return_if_fail (proc_install->name != NULL);
+
+  canonical = gimp_canonicalize_identifier (proc_install->name);
+
+  /*  Sanity check for array arguments  */
+
+  for (i = 1; i < proc_install->nparams; i++)
+    {
+      if ((proc_install->params[i].type == GIMP_PDB_INT32ARRAY ||
+           proc_install->params[i].type == GIMP_PDB_INT8ARRAY  ||
+           proc_install->params[i].type == GIMP_PDB_FLOATARRAY ||
+           proc_install->params[i].type == GIMP_PDB_STRINGARRAY ||
+           proc_install->params[i].type == GIMP_PDB_COLORARRAY)
+          &&
+          proc_install->params[i - 1].type != GIMP_PDB_INT32)
+        {
+          gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                        "Plug-in \"%s\"\n(%s)\n\n"
+                        "attempted to install procedure \"%s\" "
+                        "which fails to comply with the array parameter "
+                        "passing standard.  Argument %d is noncompliant.",
+                        gimp_object_get_name (plug_in),
+                        gimp_file_get_utf8_name (plug_in->file),
+                        canonical, i);
+          g_free (canonical);
+          return;
+        }
+    }
+
+  /*  Sanity check strings for UTF-8 validity  */
+
+#define VALIDATE(str)         (g_utf8_validate ((str), -1, NULL))
+#define VALIDATE_OR_NULL(str) ((str) == NULL || g_utf8_validate ((str), -1, NULL))
+
+  if (VALIDATE_OR_NULL (proc_install->menu_path) &&
+      VALIDATE         (canonical)               &&
+      VALIDATE_OR_NULL (proc_install->blurb)     &&
+      VALIDATE_OR_NULL (proc_install->help)      &&
+      VALIDATE_OR_NULL (proc_install->author)    &&
+      VALIDATE_OR_NULL (proc_install->copyright) &&
+      VALIDATE_OR_NULL (proc_install->date))
+    {
+      null_name  = FALSE;
+      valid_utf8 = TRUE;
+
+      for (i = 0; i < proc_install->nparams && valid_utf8 && !null_name; i++)
+        {
+          if (! proc_install->params[i].name)
+            {
+              null_name = TRUE;
+            }
+          else if (! (VALIDATE         (proc_install->params[i].name) &&
+                      VALIDATE_OR_NULL (proc_install->params[i].description)))
+            {
+              valid_utf8 = FALSE;
+            }
+        }
+
+      for (i = 0; i < proc_install->nreturn_vals && valid_utf8 && !null_name; i++)
+        {
+          if (! proc_install->return_vals[i].name)
+            {
+              null_name = TRUE;
+            }
+          else if (! (VALIDATE         (proc_install->return_vals[i].name) &&
+                      VALIDATE_OR_NULL (proc_install->return_vals[i].description)))
+            {
+              valid_utf8 = FALSE;
+            }
+        }
+    }
+
+#undef VALIDATE
+#undef VALIDATE_OR_NULL
+
+  if (null_name)
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "attempted to install procedure \"%s\" with a "
+                    "NULL parameter name.",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file),
+                    canonical);
+      g_free (canonical);
+      return;
+    }
+
+  if (! valid_utf8)
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "attempted to install procedure \"%s\" with "
+                    "invalid UTF-8 strings.",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file),
+                    canonical);
+      g_free (canonical);
+      return;
+    }
+
+  if (proc_install->menu_path && strlen (proc_install->menu_path) &&
+      proc_install->menu_path[0] == '<')
+    {
+      g_printerr ("Plug-in \"%s\"\n(%s) "
+                  "is installing procedure \"%s\" with a full "
+                  "menu path \"%s\" as menu label, this deprecated and will "
+                  "be an error in GIMP 3.0\n",
+                  gimp_object_get_name (plug_in),
+                  gimp_file_get_utf8_name (plug_in->file),
+                  canonical,
+                  proc_install->menu_path);
+    }
+
+  /*  Create the procedure object  */
+
+  switch (proc_install->type)
+    {
+    case GIMP_PLUGIN:
+    case GIMP_EXTENSION:
+      procedure = gimp_plug_in_procedure_new (proc_install->type,
+                                              plug_in->file);
+      break;
+
+    case GIMP_TEMPORARY:
+      procedure = gimp_temporary_procedure_new (plug_in);
+      break;
+    }
+
+  proc = GIMP_PLUG_IN_PROCEDURE (procedure);
+
+  proc->mtime                 = time (NULL);
+  proc->installed_during_init = (plug_in->call_mode == GIMP_PLUG_IN_CALL_INIT);
+
+  gimp_object_take_name (GIMP_OBJECT (procedure), canonical);
+  gimp_procedure_set_strings (procedure,
+                              proc_install->name,
+                              proc_install->blurb,
+                              proc_install->help,
+                              proc_install->author,
+                              proc_install->copyright,
+                              proc_install->date,
+                              NULL);
+
+  gimp_plug_in_procedure_set_image_types (proc, proc_install->image_types);
+
+  for (i = 0; i < proc_install->nparams; i++)
+    {
+      GParamSpec *pspec;
+      gboolean    name_valid;
+
+      pspec = gimp_pdb_compat_param_spec (plug_in->manager->gimp,
+                                          proc_install->params[i].type,
+                                          proc_install->params[i].name,
+                                          proc_install->params[i].description,
+                                          &name_valid);
+
+      gimp_procedure_add_argument (procedure, pspec);
+
+      if (pspec && ! name_valid)
+        {
+          switch (plug_in->manager->gimp->pdb_compat_mode)
+            {
+            case GIMP_PDB_COMPAT_ON:
+              break;
+
+            case GIMP_PDB_COMPAT_WARN:
+              gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_WARNING,
+                            "Plug-in \"%s\"\n(%s)\n"
+                            "attempted to install procedure \"%s\" "
+                            "with invalid parameter name \"%s\".\n"
+                            "This is deprecated.\n"
+                            "The parameter name was changed to \"%s\".",
+                            gimp_object_get_name (plug_in),
+                            gimp_file_get_utf8_name (plug_in->file),
+                            gimp_object_get_name (proc),
+                            proc_install->params[i].name,
+                            pspec->name);
+              break;
+
+            case GIMP_PDB_COMPAT_OFF:
+              gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                            "Plug-in \"%s\"\n(%s)\n"
+                            "attempted to install procedure \"%s\" "
+                            "with invalid parameter name \"%s\".\n"
+                            "This is not allowed.",
+                            gimp_object_get_name (plug_in),
+                            gimp_file_get_utf8_name (plug_in->file),
+                            gimp_object_get_name (proc),
+                            proc_install->params[i].name);
+
+              g_object_unref (proc);
+
+              return;
+            }
+        }
+    }
+
+  for (i = 0; i < proc_install->nreturn_vals; i++)
+    {
+      GParamSpec *pspec;
+      gboolean    name_valid;
+
+      pspec = gimp_pdb_compat_param_spec (plug_in->manager->gimp,
+                                          proc_install->return_vals[i].type,
+                                          proc_install->return_vals[i].name,
+                                          proc_install->return_vals[i].description,
+                                          &name_valid);
+
+      gimp_procedure_add_return_value (procedure, pspec);
+
+      if (pspec && ! name_valid)
+        {
+          switch (plug_in->manager->gimp->pdb_compat_mode)
+            {
+            case GIMP_PDB_COMPAT_ON:
+              break;
+
+            case GIMP_PDB_COMPAT_WARN:
+              gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_WARNING,
+                            "Plug-in \"%s\"\n(%s)\n"
+                            "attempted to install procedure \"%s\" "
+                            "with invalid return-value name \"%s\".\n"
+                            "This is deprecated.\n"
+                            "The return-value name was changed to \"%s\".",
+                            gimp_object_get_name (plug_in),
+                            gimp_file_get_utf8_name (plug_in->file),
+                            gimp_object_get_name (proc),
+                            proc_install->return_vals[i].name,
+                            pspec->name);
+              break;
+
+            case GIMP_PDB_COMPAT_OFF:
+              gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                            "Plug-in \"%s\"\n(%s)\n"
+                            "attempted to install procedure \"%s\" "
+                            "with invalid return-value name \"%s\".\n"
+                            "This is not allowed.",
+                            gimp_object_get_name (plug_in),
+                            gimp_file_get_utf8_name (plug_in->file),
+                            gimp_object_get_name (proc),
+                            proc_install->return_vals[i].name);
+
+              g_object_unref (proc);
+
+              return;
+            }
+        }
+    }
+
+  /*  Sanity check menu path  */
+
+  if (proc_install->menu_path && strlen (proc_install->menu_path))
+    {
+      if (proc_install->menu_path[0] == '<')
+        {
+          GError *error = NULL;
+
+          if (! gimp_plug_in_procedure_add_menu_path (proc,
+                                                      proc_install->menu_path,
+                                                      &error))
+            {
+              gimp_message_literal (plug_in->manager->gimp,
+                                    NULL, GIMP_MESSAGE_WARNING,
+                                    error->message);
+              g_clear_error (&error);
+            }
+        }
+      else
+        {
+          proc->menu_label = g_strdup (proc_install->menu_path);
+        }
+    }
+
+  /*  Install the procedure  */
+
+  switch (proc_install->type)
+    {
+    case GIMP_PLUGIN:
+    case GIMP_EXTENSION:
+      gimp_plug_in_def_add_procedure (plug_in->plug_in_def, proc);
+      break;
+
+    case GIMP_TEMPORARY:
+      gimp_plug_in_add_temp_proc (plug_in, GIMP_TEMPORARY_PROCEDURE (proc));
+      break;
+    }
+
+  g_object_unref (proc);
+}
+
+static void
+gimp_plug_in_handle_proc_uninstall (GimpPlugIn      *plug_in,
+                                    GPProcUninstall *proc_uninstall)
+{
+  GimpPlugInProcedure *proc;
+  gchar               *canonical;
+
+  g_return_if_fail (proc_uninstall != NULL);
+  g_return_if_fail (proc_uninstall->name != NULL);
+
+  canonical = gimp_canonicalize_identifier (proc_uninstall->name);
+
+  proc = gimp_plug_in_procedure_find (plug_in->temp_procedures, canonical);
+
+  if (proc)
+    gimp_plug_in_remove_temp_proc (plug_in, GIMP_TEMPORARY_PROCEDURE (proc));
+
+  g_free (canonical);
+}
+
+static void
+gimp_plug_in_handle_extension_ack (GimpPlugIn *plug_in)
+{
+  if (plug_in->ext_main_loop)
+    {
+      g_main_loop_quit (plug_in->ext_main_loop);
+    }
+  else
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "sent an EXTENSION_ACK message while not being started "
+                    "as an extension.  This should not happen.",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file));
+      gimp_plug_in_close (plug_in, TRUE);
+    }
+}
+
+static void
+gimp_plug_in_handle_has_init (GimpPlugIn *plug_in)
+{
+  if (plug_in->call_mode == GIMP_PLUG_IN_CALL_QUERY)
+    {
+      gimp_plug_in_def_set_has_init (plug_in->plug_in_def, TRUE);
+    }
+  else
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n\n"
+                    "sent an HAS_INIT message while not in query().  "
+                    "This should not happen.",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file));
+      gimp_plug_in_close (plug_in, TRUE);
+    }
+}
diff --git a/app/plug-in/gimpplugin-message.h b/app/plug-in/gimpplugin-message.h
new file mode 100644
index 0000000..1dd301f
--- /dev/null
+++ b/app/plug-in/gimpplugin-message.h
@@ -0,0 +1,28 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugin-message.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_MESSAGE_H__
+#define __GIMP_PLUG_IN_MESSAGE_H__
+
+
+void   gimp_plug_in_handle_message (GimpPlugIn      *plug_in,
+                                    GimpWireMessage *msg);
+
+
+#endif /* __GIMP_PLUG_IN_MESSAGE_H__ */
diff --git a/app/plug-in/gimpplugin-progress.c b/app/plug-in/gimpplugin-progress.c
new file mode 100644
index 0000000..ddf2ef5
--- /dev/null
+++ b/app/plug-in/gimpplugin-progress.c
@@ -0,0 +1,366 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugin-progress.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "plug-in-types.h"
+
+#include "core/gimp.h"
+#include "core/gimpparamspecs.h"
+#include "core/gimppdbprogress.h"
+#include "core/gimpprogress.h"
+
+#include "pdb/gimppdb.h"
+#include "pdb/gimppdberror.h"
+
+#include "gimpplugin.h"
+#include "gimpplugin-progress.h"
+#include "gimppluginmanager.h"
+#include "gimptemporaryprocedure.h"
+
+#include "gimp-intl.h"
+
+
+/*  local function prototypes  */
+
+static void   gimp_plug_in_progress_cancel_callback (GimpProgress *progress,
+                                                     GimpPlugIn   *plug_in);
+
+
+/*  public functions  */
+
+gint
+gimp_plug_in_progress_attach (GimpProgress *progress)
+{
+  gint attach_count;
+
+  g_return_val_if_fail (GIMP_IS_PROGRESS (progress), 0);
+
+  attach_count =
+    GPOINTER_TO_INT (g_object_get_data (G_OBJECT (progress),
+                                        "plug-in-progress-attach-count"));
+
+  attach_count++;
+
+  g_object_set_data (G_OBJECT (progress), "plug-in-progress-attach-count",
+                     GINT_TO_POINTER (attach_count));
+
+  return attach_count;
+}
+
+gint
+gimp_plug_in_progress_detach (GimpProgress *progress)
+{
+  gint attach_count;
+
+  g_return_val_if_fail (GIMP_IS_PROGRESS (progress), 0);
+
+  attach_count =
+    GPOINTER_TO_INT (g_object_get_data (G_OBJECT (progress),
+                                        "plug-in-progress-attach-count"));
+
+  attach_count--;
+
+  g_object_set_data (G_OBJECT (progress), "plug-in-progress-attach-count",
+                     GINT_TO_POINTER (attach_count));
+
+  return attach_count;
+}
+
+void
+gimp_plug_in_progress_start (GimpPlugIn  *plug_in,
+                             const gchar *message,
+                             GimpObject  *display)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+  g_return_if_fail (display == NULL || GIMP_IS_OBJECT (display));
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  if (! proc_frame->progress)
+    {
+      proc_frame->progress = gimp_new_progress (plug_in->manager->gimp,
+                                                display);
+
+      if (proc_frame->progress)
+        {
+          proc_frame->progress_created = TRUE;
+
+          g_object_ref (proc_frame->progress);
+
+          gimp_plug_in_progress_attach (proc_frame->progress);
+        }
+    }
+
+  if (proc_frame->progress)
+    {
+      if (! proc_frame->progress_cancel_id)
+        {
+          g_object_add_weak_pointer (G_OBJECT (proc_frame->progress),
+                                     (gpointer) &proc_frame->progress);
+
+          proc_frame->progress_cancel_id =
+            g_signal_connect (proc_frame->progress, "cancel",
+                              G_CALLBACK (gimp_plug_in_progress_cancel_callback),
+                              plug_in);
+        }
+
+      if (gimp_progress_is_active (proc_frame->progress))
+        {
+          if (message)
+            gimp_progress_set_text_literal (proc_frame->progress, message);
+
+          if (gimp_progress_get_value (proc_frame->progress) > 0.0)
+            gimp_progress_set_value (proc_frame->progress, 0.0);
+        }
+      else
+        {
+          gimp_progress_start (proc_frame->progress, TRUE,
+                               "%s", message ? message : "");
+        }
+    }
+}
+
+void
+gimp_plug_in_progress_end (GimpPlugIn          *plug_in,
+                           GimpPlugInProcFrame *proc_frame)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+  g_return_if_fail (proc_frame != NULL);
+
+  if (proc_frame->progress)
+    {
+      if (proc_frame->progress_cancel_id)
+        {
+          g_signal_handler_disconnect (proc_frame->progress,
+                                       proc_frame->progress_cancel_id);
+          proc_frame->progress_cancel_id = 0;
+
+          g_object_remove_weak_pointer (G_OBJECT (proc_frame->progress),
+                                        (gpointer) &proc_frame->progress);
+        }
+
+      if (gimp_plug_in_progress_detach (proc_frame->progress) < 1 &&
+          gimp_progress_is_active (proc_frame->progress))
+        {
+          gimp_progress_end (proc_frame->progress);
+        }
+
+      if (proc_frame->progress_created)
+        {
+          gimp_free_progress (plug_in->manager->gimp, proc_frame->progress);
+          g_clear_object (&proc_frame->progress);
+        }
+    }
+}
+
+void
+gimp_plug_in_progress_set_text (GimpPlugIn  *plug_in,
+                                const gchar *message)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  if (proc_frame->progress)
+    gimp_progress_set_text_literal (proc_frame->progress, message);
+}
+
+void
+gimp_plug_in_progress_set_value (GimpPlugIn *plug_in,
+                                 gdouble     percentage)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  if (! proc_frame->progress                           ||
+      ! gimp_progress_is_active (proc_frame->progress) ||
+      ! proc_frame->progress_cancel_id)
+    {
+      gimp_plug_in_progress_start (plug_in, NULL, NULL);
+    }
+
+  if (proc_frame->progress && gimp_progress_is_active (proc_frame->progress))
+    gimp_progress_set_value (proc_frame->progress, percentage);
+}
+
+void
+gimp_plug_in_progress_pulse (GimpPlugIn *plug_in)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  if (! proc_frame->progress                           ||
+      ! gimp_progress_is_active (proc_frame->progress) ||
+      ! proc_frame->progress_cancel_id)
+    {
+      gimp_plug_in_progress_start (plug_in, NULL, NULL);
+    }
+
+  if (proc_frame->progress && gimp_progress_is_active (proc_frame->progress))
+    gimp_progress_pulse (proc_frame->progress);
+}
+
+guint32
+gimp_plug_in_progress_get_window_id (GimpPlugIn *plug_in)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), 0);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  if (proc_frame->progress)
+    return gimp_progress_get_window_id (proc_frame->progress);
+
+  return 0;
+}
+
+gboolean
+gimp_plug_in_progress_install (GimpPlugIn  *plug_in,
+                               const gchar *progress_callback)
+{
+  GimpPlugInProcFrame *proc_frame;
+  GimpProcedure       *procedure;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (progress_callback != NULL, FALSE);
+
+  procedure = gimp_pdb_lookup_procedure (plug_in->manager->gimp->pdb,
+                                         progress_callback);
+
+  if (! GIMP_IS_TEMPORARY_PROCEDURE (procedure)                ||
+      GIMP_TEMPORARY_PROCEDURE (procedure)->plug_in != plug_in ||
+      procedure->num_args                           != 3       ||
+      ! GIMP_IS_PARAM_SPEC_INT32 (procedure->args[0])          ||
+      ! G_IS_PARAM_SPEC_STRING   (procedure->args[1])          ||
+      ! G_IS_PARAM_SPEC_DOUBLE   (procedure->args[2]))
+    {
+      return FALSE;
+    }
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  if (proc_frame->progress)
+    {
+      gimp_plug_in_progress_end (plug_in, proc_frame);
+
+      g_clear_object (&proc_frame->progress);
+    }
+
+  proc_frame->progress = g_object_new (GIMP_TYPE_PDB_PROGRESS,
+                                       "pdb",           plug_in->manager->gimp->pdb,
+                                       "context",       proc_frame->main_context,
+                                       "callback-name", progress_callback,
+                                       NULL);
+
+  gimp_plug_in_progress_attach (proc_frame->progress);
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_progress_uninstall (GimpPlugIn  *plug_in,
+                                 const gchar *progress_callback)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (progress_callback != NULL, FALSE);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  if (GIMP_IS_PDB_PROGRESS (proc_frame->progress))
+    {
+      gimp_plug_in_progress_end (plug_in, proc_frame);
+
+      g_clear_object (&proc_frame->progress);
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+gboolean
+gimp_plug_in_progress_cancel (GimpPlugIn  *plug_in,
+                              const gchar *progress_callback)
+{
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (progress_callback != NULL, FALSE);
+
+  return FALSE;
+}
+
+
+/*  private functions  */
+
+static GimpValueArray *
+get_cancel_return_values (GimpProcedure *procedure)
+{
+  GimpValueArray *return_vals;
+  GError         *error;
+
+  error = g_error_new_literal (GIMP_PDB_ERROR, GIMP_PDB_ERROR_CANCELLED,
+                               _("Cancelled"));
+  return_vals = gimp_procedure_get_return_values (procedure, FALSE, error);
+  g_error_free (error);
+
+  return return_vals;
+}
+
+static void
+gimp_plug_in_progress_cancel_callback (GimpProgress *progress,
+                                       GimpPlugIn   *plug_in)
+{
+  GimpPlugInProcFrame *proc_frame = &plug_in->main_proc_frame;
+  GList               *list;
+
+  if (proc_frame->main_loop)
+    {
+      proc_frame->return_vals =
+        get_cancel_return_values (proc_frame->procedure);
+    }
+
+  for (list = plug_in->temp_proc_frames; list; list = g_list_next (list))
+    {
+      proc_frame = list->data;
+
+      if (proc_frame->main_loop)
+        {
+          proc_frame->return_vals =
+            get_cancel_return_values (proc_frame->procedure);
+        }
+    }
+
+  gimp_plug_in_close (plug_in, TRUE);
+}
diff --git a/app/plug-in/gimpplugin-progress.h b/app/plug-in/gimpplugin-progress.h
new file mode 100644
index 0000000..56e5285
--- /dev/null
+++ b/app/plug-in/gimpplugin-progress.h
@@ -0,0 +1,47 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugin-progress.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_PROGRESS_H__
+#define __GIMP_PLUG_IN_PROGRESS_H__
+
+
+gint       gimp_plug_in_progress_attach        (GimpProgress        *progress);
+gint       gimp_plug_in_progress_detach        (GimpProgress        *progress);
+
+void       gimp_plug_in_progress_start         (GimpPlugIn          *plug_in,
+                                                const gchar         *message,
+                                                GimpObject          *display);
+void       gimp_plug_in_progress_end           (GimpPlugIn          *plug_in,
+                                                GimpPlugInProcFrame *proc_frame);
+void       gimp_plug_in_progress_set_text      (GimpPlugIn          *plug_in,
+                                                const gchar         *message);
+void       gimp_plug_in_progress_set_value     (GimpPlugIn          *plug_in,
+                                                gdouble              percentage);
+void       gimp_plug_in_progress_pulse         (GimpPlugIn          *plug_in);
+guint32    gimp_plug_in_progress_get_window_id (GimpPlugIn          *plug_in);
+
+gboolean   gimp_plug_in_progress_install       (GimpPlugIn          *plug_in,
+                                                const gchar         *progress_callback);
+gboolean   gimp_plug_in_progress_uninstall     (GimpPlugIn          *plug_in,
+                                                const gchar         *progress_callback);
+gboolean   gimp_plug_in_progress_cancel        (GimpPlugIn          *plug_in,
+                                                const gchar         *progress_callback);
+
+
+#endif /* __GIMP_PLUG_IN_PROGRESS_H__ */
diff --git a/app/plug-in/gimpplugin.c b/app/plug-in/gimpplugin.c
new file mode 100644
index 0000000..fc18486
--- /dev/null
+++ b/app/plug-in/gimpplugin.c
@@ -0,0 +1,1060 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugin.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#ifndef _WIN32
+#define _GNU_SOURCE
+#endif
+
+#include <errno.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#if defined(G_OS_WIN32) || defined(G_WITH_CYGWIN)
+
+#define STRICT
+#include <windows.h>
+#include <process.h>
+
+#ifdef G_OS_WIN32
+#include <fcntl.h>
+#include <io.h>
+
+#ifndef pipe
+#define pipe(fds) _pipe(fds, 4096, _O_BINARY)
+#endif
+
+#endif
+
+#ifdef G_WITH_CYGWIN
+#define O_TEXT    0x0100  /* text file   */
+#define _O_TEXT   0x0100  /* text file   */
+#define O_BINARY  0x0200  /* binary file */
+#define _O_BINARY 0x0200  /* binary file */
+#endif
+
+#endif /* G_OS_WIN32 || G_WITH_CYGWIN */
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpbase/gimpprotocol.h"
+#include "libgimpbase/gimpwire.h"
+
+#include "plug-in-types.h"
+
+#include "core/gimp.h"
+#include "core/gimp-spawn.h"
+#include "core/gimpprogress.h"
+
+#include "pdb/gimppdbcontext.h"
+
+#include "gimpenvirontable.h"
+#include "gimpinterpreterdb.h"
+#include "gimpplugin.h"
+#include "gimpplugin-message.h"
+#include "gimpplugin-progress.h"
+#include "gimpplugindebug.h"
+#include "gimpplugindef.h"
+#include "gimppluginmanager.h"
+#include "gimppluginmanager-help-domain.h"
+#include "gimppluginmanager-locale-domain.h"
+#include "gimptemporaryprocedure.h"
+#include "plug-in-params.h"
+
+#include "gimp-intl.h"
+
+
+static void       gimp_plug_in_finalize      (GObject      *object);
+
+static gboolean   gimp_plug_in_recv_message  (GIOChannel   *channel,
+                                              GIOCondition  cond,
+                                              gpointer      data);
+static gboolean   gimp_plug_in_write         (GIOChannel   *channel,
+                                              const guint8 *buf,
+                                              gulong        count,
+                                              gpointer      data);
+static gboolean   gimp_plug_in_flush         (GIOChannel   *channel,
+                                              gpointer      data);
+
+#if defined G_OS_WIN32 && defined WIN32_32BIT_DLL_FOLDER
+static void       gimp_plug_in_set_dll_directory (const gchar *path);
+#endif
+
+
+
+G_DEFINE_TYPE (GimpPlugIn, gimp_plug_in, GIMP_TYPE_OBJECT)
+
+#define parent_class gimp_plug_in_parent_class
+
+
+static void
+gimp_plug_in_class_init (GimpPlugInClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = gimp_plug_in_finalize;
+
+  /* initialize the gimp protocol library and set the read and
+   *  write handlers.
+   */
+  gp_init ();
+  gimp_wire_set_writer (gimp_plug_in_write);
+  gimp_wire_set_flusher (gimp_plug_in_flush);
+}
+
+static void
+gimp_plug_in_init (GimpPlugIn *plug_in)
+{
+  plug_in->manager            = NULL;
+  plug_in->file               = NULL;
+
+  plug_in->call_mode          = GIMP_PLUG_IN_CALL_NONE;
+  plug_in->open               = FALSE;
+  plug_in->hup                = FALSE;
+  plug_in->pid                = 0;
+
+  plug_in->my_read            = NULL;
+  plug_in->my_write           = NULL;
+  plug_in->his_read           = NULL;
+  plug_in->his_write          = NULL;
+
+  plug_in->input_id           = 0;
+  plug_in->write_buffer_index = 0;
+
+  plug_in->temp_procedures    = NULL;
+
+  plug_in->ext_main_loop      = NULL;
+
+  plug_in->temp_proc_frames   = NULL;
+
+  plug_in->plug_in_def        = NULL;
+}
+
+static void
+gimp_plug_in_finalize (GObject *object)
+{
+  GimpPlugIn *plug_in = GIMP_PLUG_IN (object);
+
+  g_clear_object (&plug_in->file);
+
+  gimp_plug_in_proc_frame_dispose (&plug_in->main_proc_frame, plug_in);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gboolean
+gimp_plug_in_recv_message (GIOChannel   *channel,
+                           GIOCondition  cond,
+                           gpointer      data)
+{
+  GimpPlugIn *plug_in     = data;
+  gboolean    got_message = FALSE;
+
+#ifdef G_OS_WIN32
+  /* Workaround for GLib bug #137968: sometimes we are called for no
+   * reason...
+   */
+  if (cond == 0)
+    return TRUE;
+#endif
+
+  if (plug_in->my_read == NULL)
+    return TRUE;
+
+  g_object_ref (plug_in);
+
+  if (cond & (G_IO_IN | G_IO_PRI))
+    {
+      GimpWireMessage msg;
+
+      memset (&msg, 0, sizeof (GimpWireMessage));
+
+      if (! gimp_wire_read_msg (plug_in->my_read, &msg, plug_in))
+        {
+          gimp_plug_in_close (plug_in, TRUE);
+        }
+      else
+        {
+          gimp_plug_in_handle_message (plug_in, &msg);
+          gimp_wire_destroy (&msg);
+          got_message = TRUE;
+        }
+    }
+
+  if (cond & (G_IO_ERR | G_IO_HUP))
+    {
+      if (cond & G_IO_HUP)
+        plug_in->hup = TRUE;
+
+      if (plug_in->open)
+        gimp_plug_in_close (plug_in, TRUE);
+    }
+
+  if (! got_message)
+    {
+      GimpPlugInProcFrame *frame    = gimp_plug_in_get_proc_frame (plug_in);
+      GimpProgress        *progress = frame ? frame->progress : NULL;
+
+      gimp_message (plug_in->manager->gimp, G_OBJECT (progress),
+                    GIMP_MESSAGE_ERROR,
+                    _("Plug-in crashed: \"%s\"\n(%s)\n\n"
+                      "The dying plug-in may have messed up GIMP's internal "
+                      "state. You may want to save your images and restart "
+                      "GIMP to be on the safe side."),
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file));
+    }
+
+  g_object_unref (plug_in);
+
+  return TRUE;
+}
+
+static gboolean
+gimp_plug_in_write (GIOChannel   *channel,
+                    const guint8 *buf,
+                    gulong        count,
+                    gpointer      data)
+{
+  GimpPlugIn *plug_in = data;
+  gulong      bytes;
+
+  while (count > 0)
+    {
+      if ((plug_in->write_buffer_index + count) >= WRITE_BUFFER_SIZE)
+        {
+          bytes = WRITE_BUFFER_SIZE - plug_in->write_buffer_index;
+          memcpy (&plug_in->write_buffer[plug_in->write_buffer_index],
+                  buf, bytes);
+          plug_in->write_buffer_index += bytes;
+          if (! gimp_wire_flush (channel, plug_in))
+            return FALSE;
+        }
+      else
+        {
+          bytes = count;
+          memcpy (&plug_in->write_buffer[plug_in->write_buffer_index],
+                  buf, bytes);
+          plug_in->write_buffer_index += bytes;
+        }
+
+      buf += bytes;
+      count -= bytes;
+    }
+
+  return TRUE;
+}
+
+static gboolean
+gimp_plug_in_flush (GIOChannel *channel,
+                    gpointer    data)
+{
+  GimpPlugIn *plug_in = data;
+
+  if (plug_in->write_buffer_index > 0)
+    {
+      GIOStatus  status;
+      GError    *error = NULL;
+      gint       count;
+      gsize      bytes;
+
+      count = 0;
+      while (count != plug_in->write_buffer_index)
+        {
+          do
+            {
+              bytes = 0;
+              status = g_io_channel_write_chars (channel,
+                                                 &plug_in->write_buffer[count],
+                                                 (plug_in->write_buffer_index - count),
+                                                 &bytes,
+                                                 &error);
+            }
+          while (status == G_IO_STATUS_AGAIN);
+
+          if (status != G_IO_STATUS_NORMAL)
+            {
+              if (error)
+                {
+                  g_warning ("%s: plug_in_flush(): error: %s",
+                             gimp_filename_to_utf8 (g_get_prgname ()),
+                             error->message);
+                  g_error_free (error);
+                }
+              else
+                {
+                  g_warning ("%s: plug_in_flush(): error",
+                             gimp_filename_to_utf8 (g_get_prgname ()));
+                }
+
+              return FALSE;
+            }
+
+          count += bytes;
+        }
+
+      plug_in->write_buffer_index = 0;
+    }
+
+  return TRUE;
+}
+
+#if defined G_OS_WIN32 && defined WIN32_32BIT_DLL_FOLDER
+static void
+gimp_plug_in_set_dll_directory (const gchar *path)
+{
+  const gchar *install_dir;
+  gchar       *bin_dir;
+  LPWSTR       w_bin_dir;
+  DWORD        BinaryType;
+  int          n;
+
+  w_bin_dir = NULL;
+  install_dir = gimp_installation_directory ();
+  if (path                               &&
+      GetBinaryTypeA (path, &BinaryType) &&
+      BinaryType == SCS_32BIT_BINARY)
+    bin_dir = g_build_filename (install_dir, WIN32_32BIT_DLL_FOLDER, NULL);
+  else
+    bin_dir = g_build_filename (install_dir, "bin", NULL);
+
+  n = MultiByteToWideChar (CP_UTF8, MB_ERR_INVALID_CHARS,
+                           bin_dir, -1, NULL, 0);
+  if (n == 0)
+    goto out;
+
+  w_bin_dir = g_malloc_n (n + 1, sizeof (wchar_t));
+  n = MultiByteToWideChar (CP_UTF8, MB_ERR_INVALID_CHARS,
+                           bin_dir, -1,
+                           w_bin_dir, (n + 1) * sizeof (wchar_t));
+  if (n == 0)
+    goto out;
+
+  SetDllDirectoryW (w_bin_dir);
+
+out:
+  if (w_bin_dir)
+    g_free ((void*) w_bin_dir);
+  g_free (bin_dir);
+}
+#endif
+
+
+/*  public functions  */
+
+GimpPlugIn *
+gimp_plug_in_new (GimpPlugInManager   *manager,
+                  GimpContext         *context,
+                  GimpProgress        *progress,
+                  GimpPlugInProcedure *procedure,
+                  GFile               *file)
+{
+  GimpPlugIn *plug_in;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), NULL);
+  g_return_val_if_fail (GIMP_IS_PDB_CONTEXT (context), NULL);
+  g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
+  g_return_val_if_fail (procedure == NULL ||
+                        GIMP_IS_PLUG_IN_PROCEDURE (procedure), NULL);
+  g_return_val_if_fail (file == NULL || G_IS_FILE (file), NULL);
+  g_return_val_if_fail ((procedure != NULL || file != NULL) &&
+                        ! (procedure != NULL && file != NULL), NULL);
+
+  plug_in = g_object_new (GIMP_TYPE_PLUG_IN, NULL);
+
+  if (! file)
+    file = gimp_plug_in_procedure_get_file (procedure);
+
+  gimp_object_take_name (GIMP_OBJECT (plug_in),
+                         g_path_get_basename (gimp_file_get_utf8_name (file)));
+
+  plug_in->manager = manager;
+  plug_in->file    = g_object_ref (file);
+
+  gimp_plug_in_proc_frame_init (&plug_in->main_proc_frame,
+                                context, progress, procedure);
+
+  return plug_in;
+}
+
+gboolean
+gimp_plug_in_open (GimpPlugIn         *plug_in,
+                   GimpPlugInCallMode  call_mode,
+                   gboolean            synchronous)
+{
+  gchar        *progname;
+  gint          my_read[2];
+  gint          my_write[2];
+  gchar       **envp;
+  const gchar  *args[9];
+  gchar       **argv;
+  gint          argc;
+  gchar        *interp, *interp_arg;
+  gchar        *his_read_fd, *his_write_fd;
+  const gchar  *mode;
+  gchar        *stm;
+  GError       *error = NULL;
+  gboolean      debug;
+  guint         debug_flag;
+  guint         spawn_flags;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (plug_in->call_mode == GIMP_PLUG_IN_CALL_NONE, FALSE);
+
+  /* Open two pipes. (Bidirectional communication).
+   */
+  if ((pipe (my_read) == -1) || (pipe (my_write) == -1))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Unable to run plug-in \"%s\"\n(%s)\n\npipe() failed: %s",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file),
+                    g_strerror (errno));
+      return FALSE;
+    }
+
+#if defined(G_WITH_CYGWIN)
+  /* Set to binary mode */
+  setmode (my_read[0], _O_BINARY);
+  setmode (my_write[0], _O_BINARY);
+  setmode (my_read[1], _O_BINARY);
+  setmode (my_write[1], _O_BINARY);
+#endif
+
+  /* Prevent the plug-in from inheriting our end of the pipes */
+  gimp_spawn_set_cloexec (my_read[0]);
+  gimp_spawn_set_cloexec (my_write[1]);
+
+#ifdef G_OS_WIN32
+  plug_in->my_read   = g_io_channel_win32_new_fd (my_read[0]);
+  plug_in->my_write  = g_io_channel_win32_new_fd (my_write[1]);
+  plug_in->his_read  = g_io_channel_win32_new_fd (my_write[0]);
+  plug_in->his_write = g_io_channel_win32_new_fd (my_read[1]);
+#else
+  plug_in->my_read   = g_io_channel_unix_new (my_read[0]);
+  plug_in->my_write  = g_io_channel_unix_new (my_write[1]);
+  plug_in->his_read  = g_io_channel_unix_new (my_write[0]);
+  plug_in->his_write = g_io_channel_unix_new (my_read[1]);
+#endif
+
+  g_io_channel_set_encoding (plug_in->my_read, NULL, NULL);
+  g_io_channel_set_encoding (plug_in->my_write, NULL, NULL);
+  g_io_channel_set_encoding (plug_in->his_read, NULL, NULL);
+  g_io_channel_set_encoding (plug_in->his_write, NULL, NULL);
+
+  g_io_channel_set_buffered (plug_in->my_read, FALSE);
+  g_io_channel_set_buffered (plug_in->my_write, FALSE);
+  g_io_channel_set_buffered (plug_in->his_read, FALSE);
+  g_io_channel_set_buffered (plug_in->his_write, FALSE);
+
+  g_io_channel_set_close_on_unref (plug_in->my_read, TRUE);
+  g_io_channel_set_close_on_unref (plug_in->my_write, TRUE);
+  g_io_channel_set_close_on_unref (plug_in->his_read, TRUE);
+  g_io_channel_set_close_on_unref (plug_in->his_write, TRUE);
+
+  /* Remember the file descriptors for the pipes.
+   */
+  his_read_fd  = g_strdup_printf ("%d",
+                                  g_io_channel_unix_get_fd (plug_in->his_read));
+  his_write_fd = g_strdup_printf ("%d",
+                                  g_io_channel_unix_get_fd (plug_in->his_write));
+
+  switch (call_mode)
+    {
+    case GIMP_PLUG_IN_CALL_QUERY:
+      mode = "-query";
+      debug_flag = GIMP_DEBUG_WRAP_QUERY;
+      break;
+
+    case GIMP_PLUG_IN_CALL_INIT:
+      mode = "-init";
+      debug_flag = GIMP_DEBUG_WRAP_INIT;
+      break;
+
+    case GIMP_PLUG_IN_CALL_RUN:
+      mode = "-run";
+      debug_flag = GIMP_DEBUG_WRAP_RUN;
+      break;
+
+    default:
+      gimp_assert_not_reached ();
+    }
+
+  stm = g_strdup_printf ("%d", plug_in->manager->gimp->stack_trace_mode);
+
+  progname = g_file_get_path (plug_in->file);
+
+  interp = gimp_interpreter_db_resolve (plug_in->manager->interpreter_db,
+                                        progname, &interp_arg);
+
+  argc = 0;
+
+  if (interp)
+    args[argc++] = interp;
+
+  if (interp_arg)
+    args[argc++] = interp_arg;
+
+  args[argc++] = progname;
+  args[argc++] = "-gimp";
+  args[argc++] = his_read_fd;
+  args[argc++] = his_write_fd;
+  args[argc++] = mode;
+  args[argc++] = stm;
+  args[argc++] = NULL;
+
+  argv = (gchar **) args;
+  envp = gimp_environ_table_get_envp (plug_in->manager->environ_table);
+  spawn_flags = (G_SPAWN_LEAVE_DESCRIPTORS_OPEN |
+                 G_SPAWN_DO_NOT_REAP_CHILD      |
+                 G_SPAWN_CHILD_INHERITS_STDIN);
+
+  debug = FALSE;
+
+  if (plug_in->manager->debug)
+    {
+      gchar **debug_argv = gimp_plug_in_debug_argv (plug_in->manager->debug,
+                                                    progname,
+                                                    debug_flag, args);
+
+      if (debug_argv)
+        {
+          debug = TRUE;
+          argv = debug_argv;
+          spawn_flags |= G_SPAWN_SEARCH_PATH;
+        }
+    }
+
+  /* Fork another process. We'll remember the process id so that we
+   * can later use it to kill the filter if necessary.
+   */
+#if defined G_OS_WIN32 && defined WIN32_32BIT_DLL_FOLDER
+  gimp_plug_in_set_dll_directory (argv[0]);
+#endif
+  if (! gimp_spawn_async (argv, envp, spawn_flags, &plug_in->pid, &error))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Unable to run plug-in \"%s\"\n(%s)\n\n%s",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file),
+                    error->message);
+      g_clear_error (&error);
+      goto cleanup;
+    }
+
+  g_clear_pointer (&plug_in->his_read,  g_io_channel_unref);
+  g_clear_pointer (&plug_in->his_write, g_io_channel_unref);
+
+  if (! synchronous)
+    {
+      GSource *source;
+
+      source = g_io_create_watch (plug_in->my_read,
+                                  G_IO_IN  | G_IO_PRI | G_IO_ERR | G_IO_HUP);
+
+      g_source_set_callback (source,
+                             (GSourceFunc) gimp_plug_in_recv_message, plug_in,
+                             NULL);
+
+      g_source_set_can_recurse (source, TRUE);
+
+      plug_in->input_id = g_source_attach (source, NULL);
+      g_source_unref (source);
+    }
+
+  plug_in->open      = TRUE;
+  plug_in->call_mode = call_mode;
+
+  gimp_plug_in_manager_add_open_plug_in (plug_in->manager, plug_in);
+
+ cleanup:
+
+#if defined G_OS_WIN32 && defined WIN32_32BIT_DLL_FOLDER
+  gimp_plug_in_set_dll_directory (NULL);
+#endif
+
+  if (debug)
+    g_free (argv);
+
+  g_free (his_read_fd);
+  g_free (his_write_fd);
+  g_free (stm);
+  g_free (interp);
+  g_free (interp_arg);
+  g_free (progname);
+
+  return plug_in->open;
+}
+
+void
+gimp_plug_in_close (GimpPlugIn *plug_in,
+                    gboolean    kill_it)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+  g_return_if_fail (plug_in->open);
+
+  plug_in->open = FALSE;
+
+  if (plug_in->pid)
+    {
+#ifndef G_OS_WIN32
+      gint status;
+#endif
+
+      /*  Ask the filter to exit gracefully,
+          but not if it is closed because of a broken pipe.  */
+      if (kill_it && ! plug_in->hup)
+        {
+          gp_quit_write (plug_in->my_write, plug_in);
+
+          /*  give the plug-in some time (10 ms)  */
+          g_usleep (10000);
+        }
+
+      /* If necessary, kill the filter. */
+
+#ifndef G_OS_WIN32
+
+      if (kill_it)
+        {
+          if (plug_in->manager->gimp->be_verbose)
+            g_print ("Terminating plug-in: '%s'\n",
+                     gimp_file_get_utf8_name (plug_in->file));
+
+          /*  If the plug-in opened a process group, kill the group instead
+           *  of only the plug-in, so we kill the plug-in's children too
+           */
+          if (getpgid (0) != getpgid (plug_in->pid))
+            status = kill (- plug_in->pid, SIGKILL);
+          else
+            status = kill (plug_in->pid, SIGKILL);
+        }
+
+      /* Wait for the process to exit. This will happen
+       * immediately if it was just killed.
+       */
+      waitpid (plug_in->pid, &status, 0);
+
+#else /* G_OS_WIN32 */
+
+      if (kill_it)
+        {
+          /* Trying to avoid TerminateProcess (does mostly work).
+           * Otherwise some of our needed DLLs may get into an
+           * unstable state (see Win32 API docs).
+           */
+          DWORD dwExitCode = STILL_ACTIVE;
+          DWORD dwTries    = 10;
+
+          while (dwExitCode == STILL_ACTIVE &&
+                 GetExitCodeProcess ((HANDLE) plug_in->pid, &dwExitCode) &&
+                 (dwTries > 0))
+            {
+              Sleep (10);
+              dwTries--;
+            }
+
+          if (dwExitCode == STILL_ACTIVE)
+            {
+              if (plug_in->manager->gimp->be_verbose)
+                g_print ("Terminating plug-in: '%s'\n",
+                         gimp_file_get_utf8_name (plug_in->file));
+
+              TerminateProcess ((HANDLE) plug_in->pid, 0);
+            }
+        }
+
+#endif /* G_OS_WIN32 */
+
+      g_spawn_close_pid (plug_in->pid);
+      plug_in->pid = 0;
+    }
+
+  /* Remove the input handler. */
+  if (plug_in->input_id)
+    {
+      g_source_remove (plug_in->input_id);
+      plug_in->input_id = 0;
+    }
+
+  /* Close the pipes. */
+  g_clear_pointer (&plug_in->my_read,   g_io_channel_unref);
+  g_clear_pointer (&plug_in->my_write,  g_io_channel_unref);
+  g_clear_pointer (&plug_in->his_read,  g_io_channel_unref);
+  g_clear_pointer (&plug_in->his_write, g_io_channel_unref);
+
+  gimp_wire_clear_error ();
+
+  while (plug_in->temp_proc_frames)
+    {
+      GimpPlugInProcFrame *proc_frame = plug_in->temp_proc_frames->data;
+
+#ifdef GIMP_UNSTABLE
+      g_printerr ("plug-in '%s' aborted before sending its "
+                  "temporary procedure return values\n",
+                  gimp_object_get_name (plug_in));
+#endif
+
+      if (proc_frame->main_loop &&
+          g_main_loop_is_running (proc_frame->main_loop))
+        {
+          g_main_loop_quit (proc_frame->main_loop);
+        }
+
+      /* pop the frame here, because normally this only happens in
+       * gimp_plug_in_handle_temp_proc_return(), which can't
+       * be called after plug_in_close()
+       */
+      gimp_plug_in_proc_frame_pop (plug_in);
+    }
+
+  if (plug_in->main_proc_frame.main_loop &&
+      g_main_loop_is_running (plug_in->main_proc_frame.main_loop))
+    {
+#ifdef GIMP_UNSTABLE
+      g_printerr ("plug-in '%s' aborted before sending its "
+                  "procedure return values\n",
+                  gimp_object_get_name (plug_in));
+#endif
+
+      g_main_loop_quit (plug_in->main_proc_frame.main_loop);
+    }
+
+  if (plug_in->ext_main_loop &&
+      g_main_loop_is_running (plug_in->ext_main_loop))
+    {
+#ifdef GIMP_UNSTABLE
+      g_printerr ("extension '%s' aborted before sending its "
+                  "extension_ack message\n",
+                  gimp_object_get_name (plug_in));
+#endif
+
+      g_main_loop_quit (plug_in->ext_main_loop);
+    }
+
+  /* Unregister any temporary procedures. */
+  while (plug_in->temp_procedures)
+    gimp_plug_in_remove_temp_proc (plug_in, plug_in->temp_procedures->data);
+
+  gimp_plug_in_manager_remove_open_plug_in (plug_in->manager, plug_in);
+}
+
+GimpPlugInProcFrame *
+gimp_plug_in_get_proc_frame (GimpPlugIn *plug_in)
+{
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), NULL);
+
+  if (plug_in->temp_proc_frames)
+    return plug_in->temp_proc_frames->data;
+  else
+    return &plug_in->main_proc_frame;
+}
+
+GimpPlugInProcFrame *
+gimp_plug_in_proc_frame_push (GimpPlugIn             *plug_in,
+                              GimpContext            *context,
+                              GimpProgress           *progress,
+                              GimpTemporaryProcedure *procedure)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), NULL);
+  g_return_val_if_fail (GIMP_IS_PDB_CONTEXT (context), NULL);
+  g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
+  g_return_val_if_fail (GIMP_IS_TEMPORARY_PROCEDURE (procedure), NULL);
+
+  proc_frame = gimp_plug_in_proc_frame_new (context, progress,
+                                            GIMP_PLUG_IN_PROCEDURE (procedure));
+
+  plug_in->temp_proc_frames = g_list_prepend (plug_in->temp_proc_frames,
+                                              proc_frame);
+
+  return proc_frame;
+}
+
+void
+gimp_plug_in_proc_frame_pop (GimpPlugIn *plug_in)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+  g_return_if_fail (plug_in->temp_proc_frames != NULL);
+
+  proc_frame = (GimpPlugInProcFrame *) plug_in->temp_proc_frames->data;
+
+  gimp_plug_in_proc_frame_unref (proc_frame, plug_in);
+
+  plug_in->temp_proc_frames = g_list_remove (plug_in->temp_proc_frames,
+                                             proc_frame);
+}
+
+void
+gimp_plug_in_main_loop (GimpPlugIn *plug_in)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+  g_return_if_fail (plug_in->temp_proc_frames != NULL);
+
+  proc_frame = (GimpPlugInProcFrame *) plug_in->temp_proc_frames->data;
+
+  g_return_if_fail (proc_frame->main_loop == NULL);
+
+  proc_frame->main_loop = g_main_loop_new (NULL, FALSE);
+
+  gimp_threads_leave (plug_in->manager->gimp);
+  g_main_loop_run (proc_frame->main_loop);
+  gimp_threads_enter (plug_in->manager->gimp);
+
+  g_clear_pointer (&proc_frame->main_loop, g_main_loop_unref);
+}
+
+void
+gimp_plug_in_main_loop_quit (GimpPlugIn *plug_in)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+  g_return_if_fail (plug_in->temp_proc_frames != NULL);
+
+  proc_frame = (GimpPlugInProcFrame *) plug_in->temp_proc_frames->data;
+
+  g_return_if_fail (proc_frame->main_loop != NULL);
+
+  g_main_loop_quit (proc_frame->main_loop);
+}
+
+const gchar *
+gimp_plug_in_get_undo_desc (GimpPlugIn *plug_in)
+{
+  GimpPlugInProcFrame *proc_frame;
+  const gchar         *undo_desc = NULL;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), NULL);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  if (proc_frame && proc_frame->procedure)
+    undo_desc = gimp_procedure_get_label (proc_frame->procedure);
+
+  return undo_desc ? undo_desc : gimp_object_get_name (plug_in);
+}
+
+/*  called from the PDB (gimp_plugin_menu_register)  */
+gboolean
+gimp_plug_in_menu_register (GimpPlugIn  *plug_in,
+                            const gchar *proc_name,
+                            const gchar *menu_path)
+{
+  GimpPlugInProcedure *proc  = NULL;
+  GError              *error = NULL;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+  g_return_val_if_fail (proc_name != NULL, FALSE);
+  g_return_val_if_fail (menu_path != NULL, FALSE);
+
+  if (plug_in->plug_in_def)
+    proc = gimp_plug_in_procedure_find (plug_in->plug_in_def->procedures,
+                                        proc_name);
+
+  if (! proc)
+    proc = gimp_plug_in_procedure_find (plug_in->temp_procedures, proc_name);
+
+  if (! proc)
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n"
+                    "attempted to register the menu item \"%s\" "
+                    "for the procedure \"%s\".\n"
+                    "It has however not installed that procedure.  This "
+                    "is not allowed.",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file),
+                    menu_path, proc_name);
+
+      return FALSE;
+    }
+
+  switch (GIMP_PROCEDURE (proc)->proc_type)
+    {
+    case GIMP_INTERNAL:
+      return FALSE;
+
+    case GIMP_PLUGIN:
+    case GIMP_EXTENSION:
+      if (plug_in->call_mode != GIMP_PLUG_IN_CALL_QUERY &&
+          plug_in->call_mode != GIMP_PLUG_IN_CALL_INIT)
+        return FALSE;
+
+    case GIMP_TEMPORARY:
+      break;
+    }
+
+  if (! proc->menu_label)
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n"
+                    "attempted to register the menu item \"%s\" "
+                    "for procedure \"%s\".\n"
+                    "The menu label given in gimp_install_procedure() "
+                    "already contained a path.  To make this work, "
+                    "pass just the menu's label to "
+                    "gimp_install_procedure().",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file),
+                    menu_path, proc_name);
+
+      return FALSE;
+    }
+
+  if (! strlen (proc->menu_label))
+    {
+      gimp_message (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "Plug-in \"%s\"\n(%s)\n"
+                    "attempted to register the procedure \"%s\" "
+                    "in the menu \"%s\", but the procedure has no label.  "
+                    "This is not allowed.",
+                    gimp_object_get_name (plug_in),
+                    gimp_file_get_utf8_name (plug_in->file),
+                    proc_name, menu_path);
+
+      return FALSE;
+    }
+
+  if (! gimp_plug_in_procedure_add_menu_path (proc, menu_path, &error))
+    {
+      gimp_message_literal (plug_in->manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                            error->message);
+      g_clear_error (&error);
+
+      return FALSE;
+    }
+
+  return TRUE;
+}
+
+void
+gimp_plug_in_add_temp_proc (GimpPlugIn             *plug_in,
+                            GimpTemporaryProcedure *proc)
+{
+  GimpPlugInProcedure *overridden;
+  const gchar         *locale_domain;
+  const gchar         *help_domain;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+  g_return_if_fail (GIMP_IS_TEMPORARY_PROCEDURE (proc));
+
+  overridden = gimp_plug_in_procedure_find (plug_in->temp_procedures,
+                                            gimp_object_get_name (proc));
+
+  if (overridden)
+    gimp_plug_in_remove_temp_proc (plug_in,
+                                   GIMP_TEMPORARY_PROCEDURE (overridden));
+
+  locale_domain = gimp_plug_in_manager_get_locale_domain (plug_in->manager,
+                                                          plug_in->file,
+                                                          NULL);
+  help_domain = gimp_plug_in_manager_get_help_domain (plug_in->manager,
+                                                      plug_in->file,
+                                                      NULL);
+
+  gimp_plug_in_procedure_set_locale_domain (GIMP_PLUG_IN_PROCEDURE (proc),
+                                            locale_domain);
+  gimp_plug_in_procedure_set_help_domain (GIMP_PLUG_IN_PROCEDURE (proc),
+                                          help_domain);
+
+  plug_in->temp_procedures = g_slist_prepend (plug_in->temp_procedures,
+                                              g_object_ref (proc));
+  gimp_plug_in_manager_add_temp_proc (plug_in->manager, proc);
+}
+
+void
+gimp_plug_in_remove_temp_proc (GimpPlugIn             *plug_in,
+                               GimpTemporaryProcedure *proc)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+  g_return_if_fail (GIMP_IS_TEMPORARY_PROCEDURE (proc));
+
+  plug_in->temp_procedures = g_slist_remove (plug_in->temp_procedures, proc);
+
+  gimp_plug_in_manager_remove_temp_proc (plug_in->manager, proc);
+  g_object_unref (proc);
+}
+
+void
+gimp_plug_in_set_error_handler (GimpPlugIn          *plug_in,
+                                GimpPDBErrorHandler  handler)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  if (proc_frame)
+    proc_frame->error_handler = handler;
+}
+
+GimpPDBErrorHandler
+gimp_plug_in_get_error_handler (GimpPlugIn *plug_in)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in),
+                        GIMP_PDB_ERROR_HANDLER_INTERNAL);
+
+  proc_frame = gimp_plug_in_get_proc_frame (plug_in);
+
+  if (proc_frame)
+    return proc_frame->error_handler;
+
+  return GIMP_PDB_ERROR_HANDLER_INTERNAL;
+}
+
+void
+gimp_plug_in_enable_precision (GimpPlugIn *plug_in)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+
+  plug_in->precision = TRUE;
+}
+
+gboolean
+gimp_plug_in_precision_enabled (GimpPlugIn *plug_in)
+{
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), FALSE);
+
+  return plug_in->precision;
+}
diff --git a/app/plug-in/gimpplugin.h b/app/plug-in/gimpplugin.h
new file mode 100644
index 0000000..15326a0
--- /dev/null
+++ b/app/plug-in/gimpplugin.h
@@ -0,0 +1,127 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugin.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_H__
+#define __GIMP_PLUG_IN_H__
+
+
+#include "core/gimpobject.h"
+#include "gimppluginprocframe.h"
+
+
+#define WRITE_BUFFER_SIZE  512
+
+
+#define GIMP_TYPE_PLUG_IN            (gimp_plug_in_get_type ())
+#define GIMP_PLUG_IN(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_PLUG_IN, GimpPlugIn))
+#define GIMP_PLUG_IN_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_PLUG_IN, GimpPlugInClass))
+#define GIMP_IS_PLUG_IN(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_PLUG_IN))
+#define GIMP_IS_PLUG_IN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_PLUG_IN))
+
+
+typedef struct _GimpPlugInClass GimpPlugInClass;
+
+struct _GimpPlugIn
+{
+  GimpObject           parent_instance;
+
+  GimpPlugInManager   *manager;
+  GFile               *file;            /*  Plug-in's full path name          */
+
+  GimpPlugInCallMode   call_mode;       /*  QUERY, INIT or RUN                */
+  guint                open : 1;        /*  Is the plug-in open?              */
+  guint                hup : 1;         /*  Did we receive a G_IO_HUP         */
+  guint                precision : 1;   /*  True drawable precision enabled   */
+  GPid                 pid;             /*  Plug-in's process id              */
+
+  GIOChannel          *my_read;         /*  App's read and write channels     */
+  GIOChannel          *my_write;
+  GIOChannel          *his_read;        /*  Plug-in's read and write channels */
+  GIOChannel          *his_write;
+
+  guint                input_id;        /*  Id of input proc                  */
+
+  gchar                write_buffer[WRITE_BUFFER_SIZE]; /* Buffer for writing */
+  gint                 write_buffer_index;              /* Buffer index       */
+
+  GSList              *temp_procedures; /*  Temporary procedures              */
+
+  GMainLoop           *ext_main_loop;   /*  for waiting for extension_ack     */
+
+  GimpPlugInProcFrame  main_proc_frame;
+
+  GList               *temp_proc_frames;
+
+  GimpPlugInDef       *plug_in_def;     /*  Valid during query() and init()   */
+};
+
+struct _GimpPlugInClass
+{
+  GimpObjectClass  parent_class;
+};
+
+
+GType         gimp_plug_in_get_type          (void) G_GNUC_CONST;
+
+GimpPlugIn  * gimp_plug_in_new               (GimpPlugInManager      *manager,
+                                              GimpContext            *context,
+                                              GimpProgress           *progress,
+                                              GimpPlugInProcedure    *procedure,
+                                              GFile                  *file);
+
+gboolean      gimp_plug_in_open              (GimpPlugIn             *plug_in,
+                                              GimpPlugInCallMode      call_mode,
+                                              gboolean                synchronous);
+void          gimp_plug_in_close             (GimpPlugIn             *plug_in,
+                                              gboolean                kill_it);
+
+GimpPlugInProcFrame *
+              gimp_plug_in_get_proc_frame    (GimpPlugIn             *plug_in);
+
+GimpPlugInProcFrame *
+              gimp_plug_in_proc_frame_push   (GimpPlugIn             *plug_in,
+                                              GimpContext            *context,
+                                              GimpProgress           *progress,
+                                              GimpTemporaryProcedure *procedure);
+void          gimp_plug_in_proc_frame_pop    (GimpPlugIn             *plug_in);
+
+void          gimp_plug_in_main_loop         (GimpPlugIn             *plug_in);
+void          gimp_plug_in_main_loop_quit    (GimpPlugIn             *plug_in);
+
+const gchar * gimp_plug_in_get_undo_desc     (GimpPlugIn             *plug_in);
+
+gboolean      gimp_plug_in_menu_register     (GimpPlugIn             *plug_in,
+                                              const gchar            *proc_name,
+                                              const gchar            *menu_path);
+
+void          gimp_plug_in_add_temp_proc     (GimpPlugIn             *plug_in,
+                                              GimpTemporaryProcedure *procedure);
+void          gimp_plug_in_remove_temp_proc  (GimpPlugIn             *plug_in,
+                                              GimpTemporaryProcedure *procedure);
+
+void          gimp_plug_in_set_error_handler (GimpPlugIn             *plug_in,
+                                              GimpPDBErrorHandler     handler);
+GimpPDBErrorHandler
+              gimp_plug_in_get_error_handler (GimpPlugIn             *plug_in);
+
+void          gimp_plug_in_enable_precision  (GimpPlugIn             *plug_in);
+gboolean      gimp_plug_in_precision_enabled (GimpPlugIn             *plug_in);
+
+
+#endif /* __GIMP_PLUG_IN_H__ */
diff --git a/app/plug-in/gimpplugindebug.c b/app/plug-in/gimpplugindebug.c
new file mode 100644
index 0000000..81c1060
--- /dev/null
+++ b/app/plug-in/gimpplugindebug.c
@@ -0,0 +1,142 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugindebug.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <glib-object.h>
+
+#include "plug-in-types.h"
+
+#include "gimpplugindebug.h"
+
+
+struct _GimpPlugInDebug
+{
+  gchar  *name;
+  guint   flags;
+  gchar **args;
+};
+
+
+static const GDebugKey gimp_debug_wrap_keys[] =
+{
+  { "query", GIMP_DEBUG_WRAP_QUERY   },
+  { "init",  GIMP_DEBUG_WRAP_INIT    },
+  { "run",   GIMP_DEBUG_WRAP_RUN     },
+  { "on",    GIMP_DEBUG_WRAP_DEFAULT }
+};
+
+
+GimpPlugInDebug *
+gimp_plug_in_debug_new (void)
+{
+  GimpPlugInDebug  *debug;
+  const gchar      *wrap, *wrapper;
+  gchar            *debug_string;
+  gchar           **args;
+  GError           *error = NULL;
+
+  wrap = g_getenv ("GIMP_PLUGIN_DEBUG_WRAP");
+  wrapper = g_getenv ("GIMP_PLUGIN_DEBUG_WRAPPER");
+
+  if (!(wrap && wrapper))
+    return NULL;
+
+  if (!g_shell_parse_argv (wrapper, NULL, &args, &error))
+    {
+      g_warning ("Unable to parse debug wrapper: \"%s\"\n%s",
+                 wrapper, error->message);
+      g_error_free (error);
+      return NULL;
+    }
+
+  debug = g_slice_new (GimpPlugInDebug);
+
+  debug->args  = args;
+
+  debug_string = strchr (wrap, ',');
+
+  if (debug_string)
+    {
+      debug->name = g_strndup (wrap, debug_string - wrap);
+      debug->flags = g_parse_debug_string (debug_string + 1,
+                                           gimp_debug_wrap_keys,
+                                           G_N_ELEMENTS (gimp_debug_wrap_keys));
+    }
+  else
+    {
+      debug->name = g_strdup (wrap);
+      debug->flags = GIMP_DEBUG_WRAP_DEFAULT;
+    }
+
+  return debug;
+}
+
+void
+gimp_plug_in_debug_free (GimpPlugInDebug *debug)
+{
+  g_return_if_fail (debug != NULL);
+
+  if (debug->name)
+    g_free (debug->name);
+
+  if (debug->args)
+    g_strfreev (debug->args);
+
+  g_slice_free (GimpPlugInDebug, debug);
+}
+
+gchar **
+gimp_plug_in_debug_argv (GimpPlugInDebug    *debug,
+                         const gchar        *name,
+                         GimpDebugWrapFlag   flag,
+                         const gchar       **args)
+{
+  GPtrArray  *argv;
+  gchar     **arg;
+  gchar      *basename;
+
+  g_return_val_if_fail (debug != NULL, NULL);
+  g_return_val_if_fail (name != NULL, NULL);
+  g_return_val_if_fail (args != NULL, NULL);
+
+  basename = g_path_get_basename (name);
+
+  if (!(debug->flags & flag) || (strcmp (debug->name, basename) != 0))
+    {
+      g_free (basename);
+      return NULL;
+    }
+
+  g_free (basename);
+
+  argv = g_ptr_array_sized_new (8);
+
+  for (arg = debug->args; *arg != NULL; arg++)
+    g_ptr_array_add (argv, *arg);
+
+  for (arg = (gchar **) args; *arg != NULL; arg++)
+    g_ptr_array_add (argv, *arg);
+
+  g_ptr_array_add (argv, NULL);
+
+  return (gchar **) g_ptr_array_free (argv, FALSE);
+}
diff --git a/app/plug-in/gimpplugindebug.h b/app/plug-in/gimpplugindebug.h
new file mode 100644
index 0000000..ec5bc33
--- /dev/null
+++ b/app/plug-in/gimpplugindebug.h
@@ -0,0 +1,43 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugindebug.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_DEBUG_H__
+#define __GIMP_PLUG_IN_DEBUG_H__
+
+
+typedef enum
+{
+  GIMP_DEBUG_WRAP_QUERY = 1 << 0,
+  GIMP_DEBUG_WRAP_INIT  = 1 << 1,
+  GIMP_DEBUG_WRAP_RUN   = 1 << 2,
+
+  GIMP_DEBUG_WRAP_DEFAULT = GIMP_DEBUG_WRAP_RUN
+} GimpDebugWrapFlag;
+
+
+GimpPlugInDebug  * gimp_plug_in_debug_new  (void);
+void               gimp_plug_in_debug_free (GimpPlugInDebug    *debug);
+
+gchar           ** gimp_plug_in_debug_argv (GimpPlugInDebug    *debug,
+                                            const gchar        *name,
+                                            GimpDebugWrapFlag   flag,
+                                            const gchar       **args);
+
+
+#endif /* __GIMP_PLUG_IN_DEBUG_H__ */
diff --git a/app/plug-in/gimpplugindef.c b/app/plug-in/gimpplugindef.c
new file mode 100644
index 0000000..83f6378
--- /dev/null
+++ b/app/plug-in/gimpplugindef.c
@@ -0,0 +1,235 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugindef.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "plug-in-types.h"
+
+#include "core/gimp-memsize.h"
+
+#include "gimpplugindef.h"
+#include "gimppluginprocedure.h"
+
+
+static void     gimp_plug_in_def_finalize    (GObject    *object);
+
+static gint64   gimp_plug_in_def_get_memsize (GimpObject *object,
+                                              gint64     *gui_size);
+
+
+G_DEFINE_TYPE (GimpPlugInDef, gimp_plug_in_def, GIMP_TYPE_OBJECT)
+
+#define parent_class gimp_plug_in_def_parent_class
+
+
+static void
+gimp_plug_in_def_class_init (GimpPlugInDefClass *klass)
+{
+  GObjectClass    *object_class      = G_OBJECT_CLASS (klass);
+  GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
+
+  object_class->finalize         = gimp_plug_in_def_finalize;
+
+  gimp_object_class->get_memsize = gimp_plug_in_def_get_memsize;
+}
+
+static void
+gimp_plug_in_def_init (GimpPlugInDef *def)
+{
+}
+
+static void
+gimp_plug_in_def_finalize (GObject *object)
+{
+  GimpPlugInDef *plug_in_def = GIMP_PLUG_IN_DEF (object);
+
+  g_object_unref (plug_in_def->file);
+  g_free (plug_in_def->locale_domain_name);
+  g_free (plug_in_def->locale_domain_path);
+  g_free (plug_in_def->help_domain_name);
+  g_free (plug_in_def->help_domain_uri);
+
+  g_slist_free_full (plug_in_def->procedures, (GDestroyNotify) g_object_unref);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gint64
+gimp_plug_in_def_get_memsize (GimpObject *object,
+                              gint64     *gui_size)
+{
+  GimpPlugInDef *plug_in_def = GIMP_PLUG_IN_DEF (object);
+  gint64         memsize     = 0;
+
+  memsize += gimp_g_object_get_memsize (G_OBJECT (plug_in_def->file));
+  memsize += gimp_string_get_memsize (plug_in_def->locale_domain_name);
+  memsize += gimp_string_get_memsize (plug_in_def->locale_domain_path);
+  memsize += gimp_string_get_memsize (plug_in_def->help_domain_name);
+  memsize += gimp_string_get_memsize (plug_in_def->help_domain_uri);
+
+  memsize += gimp_g_slist_get_memsize (plug_in_def->procedures, 0);
+
+  return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
+                                                                  gui_size);
+}
+
+
+/*  public functions  */
+
+GimpPlugInDef *
+gimp_plug_in_def_new (GFile *file)
+{
+  GimpPlugInDef *plug_in_def;
+
+  g_return_val_if_fail (G_IS_FILE (file), NULL);
+
+  plug_in_def = g_object_new (GIMP_TYPE_PLUG_IN_DEF, NULL);
+
+  plug_in_def->file = g_object_ref (file);
+
+  return plug_in_def;
+}
+
+void
+gimp_plug_in_def_add_procedure (GimpPlugInDef       *plug_in_def,
+                                GimpPlugInProcedure *proc)
+{
+  GimpPlugInProcedure *overridden;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_DEF (plug_in_def));
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  overridden = gimp_plug_in_procedure_find (plug_in_def->procedures,
+                                            gimp_object_get_name (proc));
+
+  if (overridden)
+    gimp_plug_in_def_remove_procedure (plug_in_def, overridden);
+
+  proc->mtime = plug_in_def->mtime;
+
+  gimp_plug_in_procedure_set_locale_domain (proc,
+                                            plug_in_def->locale_domain_name);
+  gimp_plug_in_procedure_set_help_domain (proc,
+                                          plug_in_def->help_domain_name);
+
+  plug_in_def->procedures = g_slist_append (plug_in_def->procedures,
+                                            g_object_ref (proc));
+}
+
+void
+gimp_plug_in_def_remove_procedure (GimpPlugInDef       *plug_in_def,
+                                   GimpPlugInProcedure *proc)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_DEF (plug_in_def));
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  plug_in_def->procedures = g_slist_remove (plug_in_def->procedures, proc);
+  g_object_unref (proc);
+}
+
+void
+gimp_plug_in_def_set_locale_domain (GimpPlugInDef *plug_in_def,
+                                    const gchar   *domain_name,
+                                    const gchar   *domain_path)
+{
+  GSList *list;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_DEF (plug_in_def));
+
+  if (plug_in_def->locale_domain_name)
+    g_free (plug_in_def->locale_domain_name);
+  plug_in_def->locale_domain_name = g_strdup (domain_name);
+
+  if (plug_in_def->locale_domain_path)
+    g_free (plug_in_def->locale_domain_path);
+  plug_in_def->locale_domain_path = g_strdup (domain_path);
+
+  for (list = plug_in_def->procedures; list; list = g_slist_next (list))
+    {
+      GimpPlugInProcedure *procedure = list->data;
+
+      gimp_plug_in_procedure_set_locale_domain (procedure,
+                                                plug_in_def->locale_domain_name);
+    }
+}
+
+void
+gimp_plug_in_def_set_help_domain (GimpPlugInDef *plug_in_def,
+                                  const gchar   *domain_name,
+                                  const gchar   *domain_uri)
+{
+  GSList *list;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_DEF (plug_in_def));
+
+  if (plug_in_def->help_domain_name)
+    g_free (plug_in_def->help_domain_name);
+  plug_in_def->help_domain_name = g_strdup (domain_name);
+
+  if (plug_in_def->help_domain_uri)
+    g_free (plug_in_def->help_domain_uri);
+  plug_in_def->help_domain_uri = g_strdup (domain_uri);
+
+  for (list = plug_in_def->procedures; list; list = g_slist_next (list))
+    {
+      GimpPlugInProcedure *procedure = list->data;
+
+      gimp_plug_in_procedure_set_help_domain (procedure,
+                                              plug_in_def->help_domain_name);
+    }
+}
+
+void
+gimp_plug_in_def_set_mtime (GimpPlugInDef *plug_in_def,
+                            gint64         mtime)
+{
+  GSList *list;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_DEF (plug_in_def));
+
+  plug_in_def->mtime = mtime;
+
+  for (list = plug_in_def->procedures; list; list = g_slist_next (list))
+    {
+      GimpPlugInProcedure *proc = list->data;
+
+      proc->mtime = plug_in_def->mtime;
+    }
+}
+
+void
+gimp_plug_in_def_set_needs_query (GimpPlugInDef *plug_in_def,
+                                  gboolean       needs_query)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_DEF (plug_in_def));
+
+  plug_in_def->needs_query = needs_query ? TRUE : FALSE;
+}
+
+void
+gimp_plug_in_def_set_has_init (GimpPlugInDef *plug_in_def,
+                               gboolean       has_init)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_DEF (plug_in_def));
+
+  plug_in_def->has_init = has_init ? TRUE : FALSE;
+}
diff --git a/app/plug-in/gimpplugindef.h b/app/plug-in/gimpplugindef.h
new file mode 100644
index 0000000..d819e1a
--- /dev/null
+++ b/app/plug-in/gimpplugindef.h
@@ -0,0 +1,82 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpplugindef.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_DEF_H__
+#define __GIMP_PLUG_IN_DEF_H__
+
+
+#include "core/gimpobject.h"
+
+
+#define GIMP_TYPE_PLUG_IN_DEF            (gimp_plug_in_def_get_type ())
+#define GIMP_PLUG_IN_DEF(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_PLUG_IN_DEF, GimpPlugInDef))
+#define GIMP_PLUG_IN_DEF_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_PLUG_IN_DEF, GimpPlugInDefClass))
+#define GIMP_IS_PLUG_IN_DEF(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_PLUG_IN_DEF))
+#define GIMP_IS_PLUG_IN_DEF_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_PLUG_IN_DEF))
+
+
+typedef struct _GimpPlugInDefClass GimpPlugInDefClass;
+
+struct _GimpPlugInDef
+{
+  GimpObject  parent_instance;
+
+  GFile      *file;
+  GSList     *procedures;
+  gchar      *locale_domain_name;
+  gchar      *locale_domain_path;
+  gchar      *help_domain_name;
+  gchar      *help_domain_uri;
+  gint64      mtime;
+  gboolean    needs_query;  /* Does the plug-in need to be queried ?     */
+  gboolean    has_init;     /* Does the plug-in need to be initialized ? */
+};
+
+struct _GimpPlugInDefClass
+{
+  GimpObjectClass  parent_class;
+};
+
+
+GType           gimp_plug_in_def_get_type (void) G_GNUC_CONST;
+
+GimpPlugInDef * gimp_plug_in_def_new      (GFile               *file);
+
+void   gimp_plug_in_def_add_procedure     (GimpPlugInDef       *plug_in_def,
+                                           GimpPlugInProcedure *proc);
+void   gimp_plug_in_def_remove_procedure  (GimpPlugInDef       *plug_in_def,
+                                           GimpPlugInProcedure *proc);
+
+void   gimp_plug_in_def_set_locale_domain (GimpPlugInDef       *plug_in_def,
+                                           const gchar         *domain_name,
+                                           const gchar         *domain_path);
+
+void   gimp_plug_in_def_set_help_domain   (GimpPlugInDef       *plug_in_def,
+                                           const gchar         *domain_name,
+                                           const gchar         *domain_uri);
+
+void   gimp_plug_in_def_set_mtime         (GimpPlugInDef       *plug_in_def,
+                                           gint64               mtime);
+void   gimp_plug_in_def_set_needs_query   (GimpPlugInDef       *plug_in_def,
+                                           gboolean             needs_query);
+void   gimp_plug_in_def_set_has_init      (GimpPlugInDef       *plug_in_def,
+                                           gboolean             has_init);
+
+
+#endif /* __GIMP_PLUG_IN_DEF_H__ */
diff --git a/app/plug-in/gimppluginerror.c b/app/plug-in/gimppluginerror.c
new file mode 100644
index 0000000..e73e1e5
--- /dev/null
+++ b/app/plug-in/gimppluginerror.c
@@ -0,0 +1,36 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <glib-object.h>
+
+#include "gimppluginerror.h"
+
+
+/**
+ * gimp_plug_in_error_quark:
+ *
+ * This function is never called directly. Use GIMP_PLUG_IN_ERROR() instead.
+ *
+ * Return value: the #GQuark that defines the GimpPlugIn error domain.
+ **/
+GQuark
+gimp_plug_in_error_quark (void)
+{
+  return g_quark_from_static_string ("gimp-plug-in-error-quark");
+}
diff --git a/app/plug-in/gimppluginerror.h b/app/plug-in/gimppluginerror.h
new file mode 100644
index 0000000..7cf7eb2
--- /dev/null
+++ b/app/plug-in/gimppluginerror.h
@@ -0,0 +1,35 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_ERROR_H__
+#define __GIMP_PLUG_IN_ERROR_H__
+
+
+typedef enum
+{
+  GIMP_PLUG_IN_FAILED,  /* generic error condition */
+  GIMP_PLUG_IN_EXECUTION_FAILED,
+  GIMP_PLUG_IN_NOT_FOUND
+} GimpPlugInErrorCode;
+
+
+#define GIMP_PLUG_IN_ERROR (gimp_plug_in_error_quark ())
+
+GQuark  gimp_plug_in_error_quark (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_PLUG_IN_ERROR_H__ */
diff --git a/app/plug-in/gimppluginmanager-call.c b/app/plug-in/gimppluginmanager-call.c
new file mode 100644
index 0000000..47791e6
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-call.c
@@ -0,0 +1,375 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-call.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#ifdef G_OS_WIN32
+#include <windows.h>
+#endif
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpbase/gimpprotocol.h"
+#include "libgimpbase/gimpwire.h"
+
+#include "plug-in-types.h"
+
+#include "config/gimpguiconfig.h"
+
+#include "core/gimp.h"
+#include "core/gimpprogress.h"
+
+#include "pdb/gimppdbcontext.h"
+
+#include "gimpplugin.h"
+#include "gimpplugin-message.h"
+#include "gimpplugindef.h"
+#include "gimppluginerror.h"
+#include "gimppluginmanager.h"
+#define __YES_I_NEED_GIMP_PLUG_IN_MANAGER_CALL__
+#include "gimppluginmanager-call.h"
+#include "gimppluginshm.h"
+#include "gimptemporaryprocedure.h"
+#include "plug-in-params.h"
+
+#include "gimp-intl.h"
+
+
+static void
+gimp_allow_set_foreground_window (GimpPlugIn *plug_in)
+{
+#ifdef G_OS_WIN32
+  AllowSetForegroundWindow (GetProcessId (plug_in->pid));
+#endif
+}
+
+/*  public functions  */
+
+void
+gimp_plug_in_manager_call_query (GimpPlugInManager *manager,
+                                 GimpContext       *context,
+                                 GimpPlugInDef     *plug_in_def)
+{
+  GimpPlugIn *plug_in;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (GIMP_IS_PDB_CONTEXT (context));
+  g_return_if_fail (GIMP_IS_PLUG_IN_DEF (plug_in_def));
+
+  plug_in = gimp_plug_in_new (manager, context, NULL,
+                              NULL, plug_in_def->file);
+
+  if (plug_in)
+    {
+      plug_in->plug_in_def = plug_in_def;
+
+      if (gimp_plug_in_open (plug_in, GIMP_PLUG_IN_CALL_QUERY, TRUE))
+        {
+          while (plug_in->open)
+            {
+              GimpWireMessage msg;
+
+              if (! gimp_wire_read_msg (plug_in->my_read, &msg, plug_in))
+                {
+                  gimp_plug_in_close (plug_in, TRUE);
+                }
+              else
+                {
+                  gimp_plug_in_handle_message (plug_in, &msg);
+                  gimp_wire_destroy (&msg);
+                }
+            }
+        }
+
+      g_object_unref (plug_in);
+    }
+}
+
+void
+gimp_plug_in_manager_call_init (GimpPlugInManager *manager,
+                                GimpContext       *context,
+                                GimpPlugInDef     *plug_in_def)
+{
+  GimpPlugIn *plug_in;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (GIMP_IS_PDB_CONTEXT (context));
+  g_return_if_fail (GIMP_IS_PLUG_IN_DEF (plug_in_def));
+
+  plug_in = gimp_plug_in_new (manager, context, NULL,
+                              NULL, plug_in_def->file);
+
+  if (plug_in)
+    {
+      plug_in->plug_in_def = plug_in_def;
+
+      if (gimp_plug_in_open (plug_in, GIMP_PLUG_IN_CALL_INIT, TRUE))
+        {
+          while (plug_in->open)
+            {
+              GimpWireMessage msg;
+
+              if (! gimp_wire_read_msg (plug_in->my_read, &msg, plug_in))
+                {
+                  gimp_plug_in_close (plug_in, TRUE);
+                }
+              else
+                {
+                  gimp_plug_in_handle_message (plug_in, &msg);
+                  gimp_wire_destroy (&msg);
+                }
+            }
+        }
+
+      g_object_unref (plug_in);
+    }
+}
+
+GimpValueArray *
+gimp_plug_in_manager_call_run (GimpPlugInManager   *manager,
+                               GimpContext         *context,
+                               GimpProgress        *progress,
+                               GimpPlugInProcedure *procedure,
+                               GimpValueArray      *args,
+                               gboolean             synchronous,
+                               GimpObject          *display)
+{
+  GimpValueArray *return_vals = NULL;
+  GimpPlugIn     *plug_in;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), NULL);
+  g_return_val_if_fail (GIMP_IS_PDB_CONTEXT (context), NULL);
+  g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (procedure), NULL);
+  g_return_val_if_fail (args != NULL, NULL);
+  g_return_val_if_fail (display == NULL || GIMP_IS_OBJECT (display), NULL);
+
+  plug_in = gimp_plug_in_new (manager, context, progress, procedure, NULL);
+
+  if (plug_in)
+    {
+      GimpCoreConfig    *core_config    = manager->gimp->config;
+      GimpGeglConfig    *gegl_config    = GIMP_GEGL_CONFIG (core_config);
+      GimpDisplayConfig *display_config = GIMP_DISPLAY_CONFIG (core_config);
+      GimpGuiConfig     *gui_config     = GIMP_GUI_CONFIG (core_config);
+      GPConfig           config;
+      GPProcRun          proc_run;
+      gint               display_ID;
+      GObject           *screen;
+      gint               monitor;
+      GFile             *icon_theme_dir;
+
+      if (! gimp_plug_in_open (plug_in, GIMP_PLUG_IN_CALL_RUN, FALSE))
+        {
+          const gchar *name  = gimp_object_get_name (plug_in);
+          GError      *error = g_error_new (GIMP_PLUG_IN_ERROR,
+                                            GIMP_PLUG_IN_EXECUTION_FAILED,
+                                            _("Failed to run plug-in \"%s\""),
+                                            name);
+
+          g_object_unref (plug_in);
+
+          return_vals = gimp_procedure_get_return_values (GIMP_PROCEDURE (procedure),
+                                                          FALSE, error);
+          g_error_free (error);
+
+          return return_vals;
+        }
+
+      display_ID = display ? gimp_get_display_ID (manager->gimp, display) : -1;
+
+      icon_theme_dir = gimp_get_icon_theme_dir (manager->gimp);
+
+      config.version          = GIMP_PROTOCOL_VERSION;
+      config.tile_width       = GIMP_PLUG_IN_TILE_WIDTH;
+      config.tile_height      = GIMP_PLUG_IN_TILE_HEIGHT;
+      config.shm_ID           = (manager->shm ?
+                                 gimp_plug_in_shm_get_ID (manager->shm) : -1);
+      config.check_size       = display_config->transparency_size;
+      config.check_type       = display_config->transparency_type;
+      config.show_help_button = (gui_config->use_help &&
+                                 gui_config->show_help_button);
+      config.use_cpu_accel    = manager->gimp->use_cpu_accel;
+      config.use_opencl       = gegl_config->use_opencl;
+      config.export_profile   = core_config->export_color_profile;
+      config.export_exif      = core_config->export_metadata_exif;
+      config.export_xmp       = core_config->export_metadata_xmp;
+      config.export_iptc      = core_config->export_metadata_iptc;
+      config.show_tooltips    = gui_config->show_tooltips;
+      config.min_colors       = 144;
+      config.gdisp_ID         = display_ID;
+      config.app_name         = (gchar *) g_get_application_name ();
+      config.wm_class         = (gchar *) gimp_get_program_class (manager->gimp);
+      config.display_name     = gimp_get_display_name (manager->gimp,
+                                                       display_ID,
+                                                       &screen, &monitor);
+      config.monitor_number   = monitor;
+      config.timestamp        = gimp_get_user_time (manager->gimp);
+      config.icon_theme_dir   = icon_theme_dir ?
+                                  g_file_get_path (icon_theme_dir) :
+                                  NULL;
+      config.tile_cache_size  = gegl_config->tile_cache_size;
+      config.swap_path        = gegl_config->swap_path;
+      config.num_processors   = gegl_config->num_processors;
+      config.swap_compression = gegl_config->swap_compression;
+
+      proc_run.name    = GIMP_PROCEDURE (procedure)->original_name;
+      proc_run.nparams = gimp_value_array_length (args);
+      proc_run.params  = plug_in_args_to_params (args, FALSE);
+
+      if (! gp_config_write (plug_in->my_write, &config, plug_in)     ||
+          ! gp_proc_run_write (plug_in->my_write, &proc_run, plug_in) ||
+          ! gimp_wire_flush (plug_in->my_write, plug_in))
+        {
+          const gchar *name  = gimp_object_get_name (plug_in);
+          GError      *error = g_error_new (GIMP_PLUG_IN_ERROR,
+                                            GIMP_PLUG_IN_EXECUTION_FAILED,
+                                            _("Failed to run plug-in \"%s\""),
+                                            name);
+
+          g_free (config.display_name);
+          g_free (config.icon_theme_dir);
+          g_free (proc_run.params);
+
+          g_object_unref (plug_in);
+
+          return_vals = gimp_procedure_get_return_values (GIMP_PROCEDURE (procedure),
+                                                          FALSE, error);
+          g_error_free (error);
+
+          return return_vals;
+        }
+
+      g_free (config.display_name);
+      g_free (config.icon_theme_dir);
+      g_free (proc_run.params);
+
+      /* If this is an extension,
+       * wait for an installation-confirmation message
+       */
+      if (GIMP_PROCEDURE (procedure)->proc_type == GIMP_EXTENSION)
+        {
+          plug_in->ext_main_loop = g_main_loop_new (NULL, FALSE);
+
+          gimp_threads_leave (manager->gimp);
+          g_main_loop_run (plug_in->ext_main_loop);
+          gimp_threads_enter (manager->gimp);
+
+          /*  main_loop is quit in gimp_plug_in_handle_extension_ack()  */
+
+          g_clear_pointer (&plug_in->ext_main_loop, g_main_loop_unref);
+        }
+
+      /* If this plug-in is requested to run synchronously,
+       * wait for its return values
+       */
+      if (synchronous)
+        {
+          GimpPlugInProcFrame *proc_frame = &plug_in->main_proc_frame;
+
+          proc_frame->main_loop = g_main_loop_new (NULL, FALSE);
+
+          gimp_threads_leave (manager->gimp);
+          g_main_loop_run (proc_frame->main_loop);
+          gimp_threads_enter (manager->gimp);
+
+          /*  main_loop is quit in gimp_plug_in_handle_proc_return()  */
+
+          g_clear_pointer (&proc_frame->main_loop, g_main_loop_unref);
+
+          return_vals = gimp_plug_in_proc_frame_get_return_values (proc_frame);
+        }
+
+      g_object_unref (plug_in);
+    }
+
+  return return_vals;
+}
+
+GimpValueArray *
+gimp_plug_in_manager_call_run_temp (GimpPlugInManager      *manager,
+                                    GimpContext            *context,
+                                    GimpProgress           *progress,
+                                    GimpTemporaryProcedure *procedure,
+                                    GimpValueArray         *args)
+{
+  GimpValueArray *return_vals = NULL;
+  GimpPlugIn     *plug_in;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), NULL);
+  g_return_val_if_fail (GIMP_IS_PDB_CONTEXT (context), NULL);
+  g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
+  g_return_val_if_fail (GIMP_IS_TEMPORARY_PROCEDURE (procedure), NULL);
+  g_return_val_if_fail (args != NULL, NULL);
+
+  plug_in = procedure->plug_in;
+
+  if (plug_in)
+    {
+      GimpPlugInProcFrame *proc_frame;
+      GPProcRun            proc_run;
+
+      proc_frame = gimp_plug_in_proc_frame_push (plug_in, context, progress,
+                                                 procedure);
+
+      proc_run.name    = GIMP_PROCEDURE (procedure)->original_name;
+      proc_run.nparams = gimp_value_array_length (args);
+      proc_run.params  = plug_in_args_to_params (args, FALSE);
+
+      if (! gp_temp_proc_run_write (plug_in->my_write, &proc_run, plug_in) ||
+          ! gimp_wire_flush (plug_in->my_write, plug_in))
+        {
+          const gchar *name  = gimp_object_get_name (plug_in);
+          GError      *error = g_error_new (GIMP_PLUG_IN_ERROR,
+                                            GIMP_PLUG_IN_EXECUTION_FAILED,
+                                            _("Failed to run plug-in \"%s\""),
+                                            name);
+
+          g_free (proc_run.params);
+          gimp_plug_in_proc_frame_pop (plug_in);
+
+          return_vals = gimp_procedure_get_return_values (GIMP_PROCEDURE (procedure),
+                                                          FALSE, error);
+          g_error_free (error);
+
+          return return_vals;
+        }
+      gimp_allow_set_foreground_window (plug_in);
+
+      g_free (proc_run.params);
+
+      g_object_ref (plug_in);
+      gimp_plug_in_proc_frame_ref (proc_frame);
+
+      gimp_plug_in_main_loop (plug_in);
+
+      /*  main_loop is quit and proc_frame is popped in
+       *  gimp_plug_in_handle_temp_proc_return()
+       */
+
+      return_vals = gimp_plug_in_proc_frame_get_return_values (proc_frame);
+
+      gimp_plug_in_proc_frame_unref (proc_frame, plug_in);
+      g_object_unref (plug_in);
+    }
+
+  return return_vals;
+}
diff --git a/app/plug-in/gimppluginmanager-call.h b/app/plug-in/gimppluginmanager-call.h
new file mode 100644
index 0000000..c456ab3
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-call.h
@@ -0,0 +1,59 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-call.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_MANAGER_CALL_H__
+#define __GIMP_PLUG_IN_MANAGER_CALL_H__
+
+#ifndef __YES_I_NEED_GIMP_PLUG_IN_MANAGER_CALL__
+#error Do not use gimp_plug_in_manager_call_run*(), use gimp_procedure_execute*() instead.
+#endif
+
+
+/*  Call the plug-in's query() function
+ */
+void             gimp_plug_in_manager_call_query    (GimpPlugInManager      *manager,
+                                                     GimpContext            *context,
+                                                     GimpPlugInDef          *plug_in_def);
+
+/*  Call the plug-in's init() function
+ */
+void             gimp_plug_in_manager_call_init     (GimpPlugInManager      *manager,
+                                                     GimpContext            *context,
+                                                     GimpPlugInDef          *plug_in_def);
+
+/*  Run a plug-in as if it were a procedure database procedure
+ */
+GimpValueArray * gimp_plug_in_manager_call_run      (GimpPlugInManager      *manager,
+                                                     GimpContext            *context,
+                                                     GimpProgress           *progress,
+                                                     GimpPlugInProcedure    *procedure,
+                                                     GimpValueArray         *args,
+                                                     gboolean                synchronous,
+                                                     GimpObject             *display);
+
+/*  Run a temp plug-in proc as if it were a procedure database procedure
+ */
+GimpValueArray * gimp_plug_in_manager_call_run_temp (GimpPlugInManager      *manager,
+                                                     GimpContext            *context,
+                                                     GimpProgress           *progress,
+                                                     GimpTemporaryProcedure *procedure,
+                                                     GimpValueArray         *args);
+
+
+#endif /* __GIMP_PLUG_IN_MANAGER_CALL_H__ */
diff --git a/app/plug-in/gimppluginmanager-data.c b/app/plug-in/gimppluginmanager-data.c
new file mode 100644
index 0000000..08047b1
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-data.c
@@ -0,0 +1,133 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-data.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gio/gio.h>
+
+#include "plug-in-types.h"
+
+#include "gimppluginmanager.h"
+#include "gimppluginmanager-data.h"
+
+
+typedef struct _GimpPlugInData GimpPlugInData;
+
+struct _GimpPlugInData
+{
+  gchar  *identifier;
+  gint32  bytes;
+  guint8 *data;
+};
+
+
+/*  public functions  */
+
+void
+gimp_plug_in_manager_data_free (GimpPlugInManager *manager)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+
+  if (manager->data_list)
+    {
+      GList *list;
+
+      for (list = manager->data_list;
+           list;
+           list = g_list_next (list))
+        {
+          GimpPlugInData *data = list->data;
+
+          g_free (data->identifier);
+          g_free (data->data);
+          g_slice_free (GimpPlugInData, data);
+        }
+
+      g_list_free (manager->data_list);
+      manager->data_list = NULL;
+    }
+}
+
+void
+gimp_plug_in_manager_set_data (GimpPlugInManager *manager,
+                               const gchar       *identifier,
+                               gint32             bytes,
+                               const guint8      *data)
+{
+  GimpPlugInData *plug_in_data;
+  GList          *list;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (identifier != NULL);
+  g_return_if_fail (bytes > 0);
+  g_return_if_fail (data != NULL);
+
+  for (list = manager->data_list; list; list = g_list_next (list))
+    {
+      plug_in_data = list->data;
+
+      if (! strcmp (plug_in_data->identifier, identifier))
+        break;
+    }
+
+  /* If there isn't already data with the specified identifier, create one */
+  if (list == NULL)
+    {
+      plug_in_data = g_slice_new0 (GimpPlugInData);
+      plug_in_data->identifier = g_strdup (identifier);
+
+      manager->data_list = g_list_prepend (manager->data_list, plug_in_data);
+    }
+  else
+    {
+      g_free (plug_in_data->data);
+    }
+
+  plug_in_data->bytes = bytes;
+  plug_in_data->data  = g_memdup (data, bytes);
+}
+
+const guint8 *
+gimp_plug_in_manager_get_data (GimpPlugInManager *manager,
+                               const gchar       *identifier,
+                               gint32            *bytes)
+{
+  GList *list;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), NULL);
+  g_return_val_if_fail (identifier != NULL, NULL);
+  g_return_val_if_fail (bytes != NULL, NULL);
+
+  *bytes = 0;
+
+  for (list = manager->data_list; list; list = g_list_next (list))
+    {
+      GimpPlugInData *plug_in_data = list->data;
+
+      if (! strcmp (plug_in_data->identifier, identifier))
+        {
+          *bytes = plug_in_data->bytes;
+          return plug_in_data->data;
+        }
+    }
+
+  return NULL;
+}
diff --git a/app/plug-in/gimppluginmanager-data.h b/app/plug-in/gimppluginmanager-data.h
new file mode 100644
index 0000000..1a88f32
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-data.h
@@ -0,0 +1,35 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-data.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_MANAGER_DATA_H__
+#define __GIMP_PLUG_IN_MANAGER_DATA_H__
+
+
+void           gimp_plug_in_manager_data_free (GimpPlugInManager *manager);
+
+void           gimp_plug_in_manager_set_data  (GimpPlugInManager *manager,
+                                               const gchar       *identifier,
+                                               gint32             bytes,
+                                               const guint8      *data);
+const guint8 * gimp_plug_in_manager_get_data  (GimpPlugInManager *manager,
+                                               const gchar       *identifier,
+                                               gint32            *bytes);
+
+
+#endif  /*  __GIMP_PLUG_IN_MANAGER_DATA_H__  */
diff --git a/app/plug-in/gimppluginmanager-file-procedure.c b/app/plug-in/gimppluginmanager-file-procedure.c
new file mode 100644
index 0000000..ec11ef6
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-file-procedure.c
@@ -0,0 +1,716 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995, 1996, 1997 Spencer Kimball and Peter Mattis
+ * Copyright (C) 1997 Josh MacDonald
+ *
+ * gimppluginmanager-file-procedure.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <errno.h>
+#include <stdlib.h>
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "plug-in-types.h"
+
+#include "core/gimp-utils.h"
+
+#include "gimppluginmanager-file-procedure.h"
+#include "gimppluginprocedure.h"
+
+#include "gimp-log.h"
+
+#include "gimp-intl.h"
+
+
+typedef enum
+{
+  /*  positive values indicate the length of a matching magic  */
+
+  FILE_MATCH_NONE = 0,
+  FILE_MATCH_SIZE = -1
+} FileMatchType;
+
+
+/*  local function prototypes  */
+
+static GimpPlugInProcedure * file_proc_find_by_prefix    (GSList       *procs,
+                                                          GFile        *file,
+                                                          gboolean      skip_magic);
+static GimpPlugInProcedure * file_proc_find_by_extension (GSList       *procs,
+                                                          GFile        *file,
+                                                          gboolean      skip_magic);
+static GimpPlugInProcedure * file_proc_find_by_name      (GSList       *procs,
+                                                          GFile        *file,
+                                                          gboolean      skip_magic);
+
+static void                  file_convert_string         (const gchar  *instr,
+                                                          gchar        *outmem,
+                                                          gint          maxmem,
+                                                          gint         *nmem);
+static FileMatchType         file_check_single_magic     (const gchar  *offset,
+                                                          const gchar  *type,
+                                                          const gchar  *value,
+                                                          const guchar *file_head,
+                                                          gint          headsize,
+                                                          GFile        *file,
+                                                          GInputStream *input);
+static FileMatchType         file_check_magic_list       (GSList       *magics_list,
+                                                          const guchar *head,
+                                                          gint          headsize,
+                                                          GFile        *file,
+                                                          GInputStream *input);
+
+
+/*  public functions  */
+
+GimpPlugInProcedure *
+file_procedure_find (GSList  *procs,
+                     GFile   *file,
+                     GError **error)
+{
+  GimpPlugInProcedure *file_proc;
+  GimpPlugInProcedure *size_matched_proc = NULL;
+  gint                 size_match_count  = 0;
+
+  g_return_val_if_fail (procs != NULL, NULL);
+  g_return_val_if_fail (G_IS_FILE (file), NULL);
+  g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+  /* First, check magicless prefixes/suffixes */
+  file_proc = file_proc_find_by_name (procs, file, TRUE);
+
+  if (file_proc)
+    return file_proc;
+
+  /* Then look for magics, but not on remote files */
+  if (g_file_is_native (file))
+    {
+      GSList              *list;
+      GInputStream        *input     = NULL;
+      gboolean             opened    = FALSE;
+      gsize                head_size = 0;
+      guchar               head[256];
+      FileMatchType        best_match_val = FILE_MATCH_NONE;
+      GimpPlugInProcedure *best_file_proc = NULL;
+
+      for (list = procs; list; list = g_slist_next (list))
+        {
+          file_proc = list->data;
+
+          if (file_proc->magics_list)
+            {
+              if (G_UNLIKELY (! opened))
+                {
+                  input = G_INPUT_STREAM (g_file_read (file, NULL, error));
+
+                  if (input)
+                    {
+                      g_input_stream_read_all (input,
+                                               head, sizeof (head),
+                                               &head_size, NULL, error);
+
+                      if (head_size < 4)
+                        {
+                          g_object_unref (input);
+                          input = NULL;
+                        }
+                      else
+                        {
+                          GDataInputStream *data_input;
+
+                          data_input = g_data_input_stream_new (input);
+                          g_object_unref (input);
+                          input = G_INPUT_STREAM (data_input);
+                        }
+                    }
+
+                  opened = TRUE;
+                }
+
+              if (head_size >= 4)
+                {
+                  FileMatchType match_val;
+
+                  match_val = file_check_magic_list (file_proc->magics_list,
+                                                     head, head_size,
+                                                     file, input);
+
+                  if (match_val == FILE_MATCH_SIZE)
+                    {
+                      /* Use it only if no other magic matches */
+                      size_match_count++;
+                      size_matched_proc = file_proc;
+                    }
+                  else if (match_val != FILE_MATCH_NONE)
+                    {
+                      GIMP_LOG (MAGIC_MATCH,
+                                "magic match %d on %s\n",
+                                match_val,
+                                gimp_object_get_name (file_proc));
+
+                      if (match_val > best_match_val)
+                        {
+                          best_match_val = match_val;
+                          best_file_proc = file_proc;
+                        }
+                    }
+                }
+            }
+        }
+
+      if (input)
+        g_object_unref (input);
+
+      if (best_file_proc)
+        {
+          GIMP_LOG (MAGIC_MATCH,
+                    "best magic match on %s\n",
+                    gimp_object_get_name (best_file_proc));
+
+          return best_file_proc;
+        }
+    }
+
+  if (size_match_count == 1)
+    return size_matched_proc;
+
+  /* As a last resort, try matching by name, not skipping magic procs */
+  file_proc = file_proc_find_by_name (procs, file, FALSE);
+
+  if (file_proc)
+    {
+      /* we found a procedure, clear error that might have been set */
+      g_clear_error (error);
+    }
+  else
+    {
+      /* set an error message unless one was already set */
+      if (error && *error == NULL)
+        g_set_error_literal (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
+                             _("Unknown file type"));
+    }
+
+  return file_proc;
+}
+
+GimpPlugInProcedure *
+file_procedure_find_by_prefix (GSList *procs,
+                               GFile  *file)
+{
+  g_return_val_if_fail (G_IS_FILE (file), NULL);
+
+  return file_proc_find_by_prefix (procs, file, FALSE);
+}
+
+GimpPlugInProcedure *
+file_procedure_find_by_extension (GSList *procs,
+                                  GFile  *file)
+{
+  g_return_val_if_fail (G_IS_FILE (file), NULL);
+
+  return file_proc_find_by_extension (procs, file, FALSE);
+}
+
+GimpPlugInProcedure *
+file_procedure_find_by_mime_type (GSList      *procs,
+                                  const gchar *mime_type)
+{
+  GSList *list;
+
+  g_return_val_if_fail (mime_type != NULL, NULL);
+
+  for (list = procs; list; list = g_slist_next (list))
+    {
+      GimpPlugInProcedure *proc = list->data;
+      GSList              *mime;
+
+      for (mime = proc->mime_types_list; mime; mime = g_slist_next (mime))
+        {
+          if (! strcmp (mime_type, mime->data))
+            return proc;
+        }
+    }
+
+  return NULL;
+}
+
+
+/*  private functions  */
+
+static GimpPlugInProcedure *
+file_proc_find_by_prefix (GSList   *procs,
+                          GFile    *file,
+                          gboolean  skip_magic)
+{
+  gchar  *uri = g_file_get_uri (file);
+  GSList *p;
+
+  for (p = procs; p; p = g_slist_next (p))
+    {
+      GimpPlugInProcedure *proc = p->data;
+      GSList              *prefixes;
+
+      if (skip_magic && proc->magics_list)
+        continue;
+
+      for (prefixes = proc->prefixes_list;
+           prefixes;
+           prefixes = g_slist_next (prefixes))
+        {
+          if (g_str_has_prefix (uri, prefixes->data))
+            {
+              g_free (uri);
+              return proc;
+            }
+        }
+     }
+
+  g_free (uri);
+
+  return NULL;
+}
+
+static GimpPlugInProcedure *
+file_proc_find_by_extension (GSList   *procs,
+                             GFile    *file,
+                             gboolean  skip_magic)
+{
+  gchar *ext = gimp_file_get_extension (file);
+
+  if (ext)
+    {
+      GSList *p;
+
+      for (p = procs; p; p = g_slist_next (p))
+        {
+          GimpPlugInProcedure *proc = p->data;
+
+          if (skip_magic && proc->magics_list)
+            continue;
+
+          if (g_slist_find_custom (proc->extensions_list,
+                                   ext + 1,
+                                   (GCompareFunc) g_ascii_strcasecmp))
+            {
+              g_free (ext);
+
+              return proc;
+            }
+        }
+
+      g_free (ext);
+    }
+
+  return NULL;
+}
+
+static GimpPlugInProcedure *
+file_proc_find_by_name (GSList   *procs,
+                        GFile    *file,
+                        gboolean  skip_magic)
+{
+  GimpPlugInProcedure *proc;
+
+  proc = file_proc_find_by_prefix (procs, file, skip_magic);
+
+  if (! proc)
+    proc = file_proc_find_by_extension (procs, file, skip_magic);
+
+  return proc;
+}
+
+static void
+file_convert_string (const gchar *instr,
+                     gchar       *outmem,
+                     gint         maxmem,
+                     gint        *nmem)
+{
+  /* Convert a string in C-notation to array of char */
+  const guchar *uin  = (const guchar *) instr;
+  guchar       *uout = (guchar *) outmem;
+  guchar        tmp[5], *tmpptr;
+  guint         k;
+
+  while ((*uin != '\0') && ((((gchar *) uout) - outmem) < maxmem))
+    {
+      if (*uin != '\\')   /* Not an escaped character ? */
+        {
+          *(uout++) = *(uin++);
+          continue;
+        }
+
+      if (*(++uin) == '\0')
+        {
+          *(uout++) = '\\';
+          break;
+        }
+
+      switch (*uin)
+        {
+          case '0':  case '1':  case '2':  case '3': /* octal */
+            for (tmpptr = tmp; (tmpptr - tmp) <= 3;)
+              {
+                *(tmpptr++) = *(uin++);
+                if (   (*uin == '\0') || (!g_ascii_isdigit (*uin))
+                    || (*uin == '8') || (*uin == '9'))
+                  break;
+              }
+
+            *tmpptr = '\0';
+            sscanf ((gchar *) tmp, "%o", &k);
+            *(uout++) = k;
+            break;
+
+          case 'a': *(uout++) = '\a'; uin++; break;
+          case 'b': *(uout++) = '\b'; uin++; break;
+          case 't': *(uout++) = '\t'; uin++; break;
+          case 'n': *(uout++) = '\n'; uin++; break;
+          case 'v': *(uout++) = '\v'; uin++; break;
+          case 'f': *(uout++) = '\f'; uin++; break;
+          case 'r': *(uout++) = '\r'; uin++; break;
+
+          default : *(uout++) = *(uin++); break;
+        }
+    }
+
+  *nmem = ((gchar *) uout) - outmem;
+}
+
+static FileMatchType
+file_check_single_magic (const gchar  *offset,
+                         const gchar  *type,
+                         const gchar  *value,
+                         const guchar *file_head,
+                         gint          headsize,
+                         GFile        *file,
+                         GInputStream *input)
+
+{
+  FileMatchType found = FILE_MATCH_NONE;
+  glong         offs;
+  gulong        num_testval;
+  gulong        num_operator_val;
+  gint          numbytes, k;
+  const gchar  *num_operator_ptr;
+  gchar         num_operator;
+
+  /* Check offset */
+  if (sscanf (offset, "%ld", &offs) != 1)
+    return FILE_MATCH_NONE;
+
+  /* Check type of test */
+  num_operator_ptr = NULL;
+  num_operator     = '\0';
+
+  if (g_str_has_prefix (type, "byte"))
+    {
+      numbytes = 1;
+      num_operator_ptr = type + strlen ("byte");
+    }
+  else if (g_str_has_prefix (type, "short"))
+    {
+      numbytes = 2;
+      num_operator_ptr = type + strlen ("short");
+    }
+  else if (g_str_has_prefix (type, "long"))
+    {
+      numbytes = 4;
+      num_operator_ptr = type + strlen ("long");
+    }
+  else if (g_str_has_prefix (type, "size"))
+    {
+      numbytes = 5;
+    }
+  else if (strcmp (type, "string") == 0)
+    {
+      numbytes = 0;
+    }
+  else
+    {
+      return FILE_MATCH_NONE;
+    }
+
+  /* Check numerical operator value if present */
+  if (num_operator_ptr && (*num_operator_ptr == '&'))
+    {
+      if (g_ascii_isdigit (num_operator_ptr[1]))
+        {
+          if (num_operator_ptr[1] != '0')      /* decimal */
+            sscanf (num_operator_ptr+1, "%lu", &num_operator_val);
+          else if (num_operator_ptr[2] == 'x') /* hexadecimal */
+            sscanf (num_operator_ptr+3, "%lx", &num_operator_val);
+          else                                 /* octal */
+            sscanf (num_operator_ptr+2, "%lo", &num_operator_val);
+
+          num_operator = *num_operator_ptr;
+        }
+    }
+
+  if (numbytes > 0)
+    {
+      /* Numerical test */
+
+      gchar   num_test = '=';
+      gulong  fileval  = 0;
+
+      /* Check test value */
+      if ((value[0] == '>') || (value[0] == '<'))
+        {
+          num_test = value[0];
+          value++;
+        }
+
+      errno = 0;
+      num_testval = strtol (value, NULL, 0);
+
+      if (errno != 0)
+        return FILE_MATCH_NONE;
+
+      if (numbytes == 5)
+        {
+          /* Check for file size */
+
+          GFileInfo *info = g_file_query_info (file,
+                                               G_FILE_ATTRIBUTE_STANDARD_SIZE,
+                                               G_FILE_QUERY_INFO_NONE,
+                                               NULL, NULL);
+          if (! info)
+            return FILE_MATCH_NONE;
+
+          fileval = g_file_info_get_size (info);
+          g_object_unref (info);
+        }
+      else if (offs >= 0 &&
+               (offs + numbytes <= headsize))
+        {
+           /* We have it in memory */
+
+          for (k = 0; k < numbytes; k++)
+            fileval = (fileval << 8) | (glong) file_head[offs + k];
+        }
+      else
+        {
+          /* Read it from file */
+
+          if (! g_seekable_seek (G_SEEKABLE (input), offs,
+                                 (offs >= 0) ? G_SEEK_SET : G_SEEK_END,
+                                 NULL, NULL))
+            return FILE_MATCH_NONE;
+
+          for (k = 0; k < numbytes; k++)
+            {
+              guchar  byte;
+              GError *error = NULL;
+
+              byte = g_data_input_stream_read_byte (G_DATA_INPUT_STREAM (input),
+                                                    NULL, &error);
+              if (error)
+                {
+                  g_clear_error (&error);
+                  return FILE_MATCH_NONE;
+                }
+
+              fileval = (fileval << 8) | byte;
+            }
+        }
+
+      if (num_operator == '&')
+        fileval &= num_operator_val;
+
+      if (num_test == '<')
+        {
+          if (fileval < num_testval)
+            found = numbytes;
+        }
+      else if (num_test == '>')
+        {
+          if (fileval > num_testval)
+            found = numbytes;
+        }
+      else
+        {
+          if (fileval == num_testval)
+            found = numbytes;
+        }
+
+      if (found && (numbytes == 5))
+        found = FILE_MATCH_SIZE;
+    }
+  else if (numbytes == 0)
+    {
+       /* String test */
+
+      gchar mem_testval[256];
+
+      file_convert_string (value,
+                           mem_testval, sizeof (mem_testval),
+                           &numbytes);
+
+      if (numbytes <= 0)
+        return FILE_MATCH_NONE;
+
+      if (offs >= 0 &&
+          (offs + numbytes <= headsize))
+        {
+          /* We have it in memory */
+
+          if (memcmp (mem_testval, file_head + offs, numbytes) == 0)
+            found = numbytes;
+        }
+      else
+        {
+          /* Read it from file */
+
+          if (! g_seekable_seek (G_SEEKABLE (input), offs,
+                                 (offs >= 0) ? G_SEEK_SET : G_SEEK_END,
+                                 NULL, NULL))
+            return FILE_MATCH_NONE;
+
+          for (k = 0; k < numbytes; k++)
+            {
+              guchar  byte;
+              GError *error = NULL;
+
+              byte = g_data_input_stream_read_byte (G_DATA_INPUT_STREAM (input),
+                                                    NULL, &error);
+              if (error)
+                {
+                  g_clear_error (&error);
+
+                  return FILE_MATCH_NONE;
+                }
+
+              if (byte != mem_testval[k])
+                return FILE_MATCH_NONE;
+            }
+
+          found = numbytes;
+        }
+    }
+
+  return found;
+}
+
+static FileMatchType
+file_check_magic_list (GSList       *magics_list,
+                       const guchar *head,
+                       gint          headsize,
+                       GFile        *file,
+                       GInputStream *input)
+
+{
+  gboolean      and            = FALSE;
+  gboolean      found          = FALSE;
+  FileMatchType best_match_val = FILE_MATCH_NONE;
+  FileMatchType match_val      = FILE_MATCH_NONE;
+
+  for (; magics_list; magics_list = magics_list->next)
+    {
+      const gchar   *offset;
+      const gchar   *type;
+      const gchar   *value;
+      FileMatchType  single_match_val = FILE_MATCH_NONE;
+
+      if ((offset      = magics_list->data) == NULL) return FILE_MATCH_NONE;
+      if ((magics_list = magics_list->next) == NULL) return FILE_MATCH_NONE;
+      if ((type        = magics_list->data) == NULL) return FILE_MATCH_NONE;
+      if ((magics_list = magics_list->next) == NULL) return FILE_MATCH_NONE;
+      if ((value       = magics_list->data) == NULL) return FILE_MATCH_NONE;
+
+      single_match_val = file_check_single_magic (offset, type, value,
+                                                  head, headsize,
+                                                  file, input);
+
+      if (and)
+        found = found && (single_match_val != FILE_MATCH_NONE);
+      else
+        found = (single_match_val != FILE_MATCH_NONE);
+
+      if (found)
+        {
+          if (match_val == FILE_MATCH_NONE)
+            {
+              /* if we have no match yet, this is it in any case */
+
+              match_val = single_match_val;
+            }
+          else if (single_match_val != FILE_MATCH_NONE)
+            {
+              /* else if we have a match on this one, combine it with the
+               * existing return value
+               */
+
+              if (single_match_val == FILE_MATCH_SIZE)
+                {
+                  /* if we already have a magic match, simply increase
+                   * that by one to indicate "better match", not perfect
+                   * but better than losing the additional size match
+                   * entirely
+                   */
+                  if (match_val != FILE_MATCH_SIZE)
+                    match_val += 1;
+                }
+              else
+                {
+                  /* if we already have a magic match, simply add to its
+                   * length; otherwise if we already have a size match,
+                   * combine it with this match, see comment above
+                   */
+                  if (match_val != FILE_MATCH_SIZE)
+                    match_val += single_match_val;
+                  else
+                    match_val = single_match_val + 1;
+                }
+            }
+        }
+      else
+        {
+          match_val = FILE_MATCH_NONE;
+        }
+
+      and = (strchr (offset, '&') != NULL);
+
+      if (! and)
+        {
+          /* when done with this 'and' list, update best_match_val */
+
+          if (best_match_val == FILE_MATCH_NONE)
+            {
+              /* if we have no best match yet, this is it */
+
+              best_match_val = match_val;
+            }
+          else if (match_val != FILE_MATCH_NONE)
+            {
+              /* otherwise if this was a match, update the best match, note
+               * that by using MAX we will not overwrite a magic match
+               * with a size match
+               */
+
+              best_match_val = MAX (best_match_val, match_val);
+            }
+
+          match_val = FILE_MATCH_NONE;
+        }
+    }
+
+  return best_match_val;
+}
diff --git a/app/plug-in/gimppluginmanager-file-procedure.h b/app/plug-in/gimppluginmanager-file-procedure.h
new file mode 100644
index 0000000..3508551
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-file-procedure.h
@@ -0,0 +1,37 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-file-procedure.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_MANAGER_FILE_PROCEDURE_H__
+#define __GIMP_PLUG_IN_MANAGER_FILE_PROCEDURE_H__
+
+
+
+GimpPlugInProcedure *file_procedure_find              (GSList      *procs,
+                                                       GFile       *file,
+                                                       GError     **error);
+GimpPlugInProcedure *file_procedure_find_by_prefix    (GSList      *procs,
+                                                       GFile       *file);
+GimpPlugInProcedure *file_procedure_find_by_extension (GSList      *procs,
+                                                       GFile       *file);
+
+GimpPlugInProcedure *file_procedure_find_by_mime_type (GSList      *procs,
+                                                       const gchar *mime_type);
+
+
+#endif /* __GIMP_PLUG_IN_MANAGER_FILE_PROCEDURE_H__ */
diff --git a/app/plug-in/gimppluginmanager-file.c b/app/plug-in/gimppluginmanager-file.c
new file mode 100644
index 0000000..4da5e55
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-file.c
@@ -0,0 +1,451 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-file.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "plug-in-types.h"
+
+#include "core/gimp.h"
+#include "core/gimpparamspecs.h"
+
+#include "gimpplugin.h"
+#include "gimpplugindef.h"
+#include "gimppluginmanager.h"
+#include "gimppluginmanager-file.h"
+#include "gimppluginmanager-file-procedure.h"
+#include "gimppluginprocedure.h"
+
+
+static gboolean   file_procedure_in_group (GimpPlugInProcedure    *file_proc,
+                                           GimpFileProcedureGroup  group);
+
+
+/*  public functions  */
+
+gboolean
+gimp_plug_in_manager_register_load_handler (GimpPlugInManager *manager,
+                                            const gchar       *name,
+                                            const gchar       *extensions,
+                                            const gchar       *prefixes,
+                                            const gchar       *magics)
+{
+  GimpPlugInProcedure *file_proc;
+  GimpProcedure       *procedure;
+  GSList              *list;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), FALSE);
+  g_return_val_if_fail (name != NULL, FALSE);
+
+  if (manager->current_plug_in && manager->current_plug_in->plug_in_def)
+    list = manager->current_plug_in->plug_in_def->procedures;
+  else
+    list = manager->plug_in_procedures;
+
+  file_proc = gimp_plug_in_procedure_find (list, name);
+
+  if (! file_proc)
+    {
+      gimp_message (manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "attempt to register nonexistent load handler \"%s\"",
+                    name);
+      return FALSE;
+    }
+
+  procedure = GIMP_PROCEDURE (file_proc);
+
+  if ((procedure->num_args   < 3)                        ||
+      (procedure->num_values < 1)                        ||
+      ! GIMP_IS_PARAM_SPEC_INT32    (procedure->args[0]) ||
+      ! G_IS_PARAM_SPEC_STRING      (procedure->args[1]) ||
+      ! G_IS_PARAM_SPEC_STRING      (procedure->args[2]) ||
+      ! GIMP_IS_PARAM_SPEC_IMAGE_ID (procedure->values[0]))
+    {
+      gimp_message (manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "load handler \"%s\" does not take the standard "
+                    "load handler args", name);
+      return FALSE;
+    }
+
+  gimp_plug_in_procedure_set_file_proc (file_proc,
+                                        extensions, prefixes, magics);
+
+  if (! g_slist_find (manager->load_procs, file_proc))
+    manager->load_procs = g_slist_prepend (manager->load_procs, file_proc);
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_manager_register_save_handler (GimpPlugInManager *manager,
+                                            const gchar       *name,
+                                            const gchar       *extensions,
+                                            const gchar       *prefixes)
+{
+  GimpPlugInProcedure *file_proc;
+  GimpProcedure       *procedure;
+  GSList              *list;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), FALSE);
+  g_return_val_if_fail (name != NULL, FALSE);
+
+  if (manager->current_plug_in && manager->current_plug_in->plug_in_def)
+    list = manager->current_plug_in->plug_in_def->procedures;
+  else
+    list = manager->plug_in_procedures;
+
+  file_proc = gimp_plug_in_procedure_find (list, name);
+
+  if (! file_proc)
+    {
+      gimp_message (manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "attempt to register nonexistent save handler \"%s\"",
+                    name);
+      return FALSE;
+    }
+
+  procedure = GIMP_PROCEDURE (file_proc);
+
+  if ((procedure->num_args < 5)                             ||
+      ! GIMP_IS_PARAM_SPEC_INT32       (procedure->args[0]) ||
+      ! GIMP_IS_PARAM_SPEC_IMAGE_ID    (procedure->args[1]) ||
+      ! GIMP_IS_PARAM_SPEC_DRAWABLE_ID (procedure->args[2]) ||
+      ! G_IS_PARAM_SPEC_STRING         (procedure->args[3]) ||
+      ! G_IS_PARAM_SPEC_STRING         (procedure->args[4]))
+    {
+      gimp_message (manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                    "save handler \"%s\" does not take the standard "
+                    "save handler args", name);
+      return FALSE;
+    }
+
+  gimp_plug_in_procedure_set_file_proc (file_proc,
+                                        extensions, prefixes, NULL);
+
+  if (file_procedure_in_group (file_proc, GIMP_FILE_PROCEDURE_GROUP_SAVE))
+    {
+      if (! g_slist_find (manager->save_procs, file_proc))
+        manager->save_procs = g_slist_prepend (manager->save_procs, file_proc);
+    }
+
+  if (file_procedure_in_group (file_proc, GIMP_FILE_PROCEDURE_GROUP_EXPORT))
+    {
+      if (! g_slist_find (manager->export_procs, file_proc))
+        manager->export_procs = g_slist_prepend (manager->export_procs, file_proc);
+    }
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_manager_register_priority (GimpPlugInManager *manager,
+                                        const gchar       *name,
+                                        gint               priority)
+{
+  GimpPlugInProcedure *file_proc;
+  GSList              *list;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), FALSE);
+  g_return_val_if_fail (name != NULL, FALSE);
+
+  if (manager->current_plug_in && manager->current_plug_in->plug_in_def)
+    list = manager->current_plug_in->plug_in_def->procedures;
+  else
+    list = manager->plug_in_procedures;
+
+  file_proc = gimp_plug_in_procedure_find (list, name);
+
+  if (! file_proc)
+    return FALSE;
+
+  gimp_plug_in_procedure_set_priority (file_proc, priority);
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_manager_register_mime_types (GimpPlugInManager *manager,
+                                          const gchar       *name,
+                                          const gchar       *mime_types)
+{
+  GimpPlugInProcedure *file_proc;
+  GSList              *list;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), FALSE);
+  g_return_val_if_fail (name != NULL, FALSE);
+  g_return_val_if_fail (mime_types != NULL, FALSE);
+
+  if (manager->current_plug_in && manager->current_plug_in->plug_in_def)
+    list = manager->current_plug_in->plug_in_def->procedures;
+  else
+    list = manager->plug_in_procedures;
+
+  file_proc = gimp_plug_in_procedure_find (list, name);
+
+  if (! file_proc)
+    return FALSE;
+
+  gimp_plug_in_procedure_set_mime_types (file_proc, mime_types);
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_manager_register_handles_uri (GimpPlugInManager *manager,
+                                           const gchar       *name)
+{
+  GimpPlugInProcedure *file_proc;
+  GSList              *list;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), FALSE);
+  g_return_val_if_fail (name != NULL, FALSE);
+
+  if (manager->current_plug_in && manager->current_plug_in->plug_in_def)
+    list = manager->current_plug_in->plug_in_def->procedures;
+  else
+    list = manager->plug_in_procedures;
+
+  file_proc = gimp_plug_in_procedure_find (list, name);
+
+  if (! file_proc)
+    return FALSE;
+
+  gimp_plug_in_procedure_set_handles_uri (file_proc);
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_manager_register_handles_raw (GimpPlugInManager *manager,
+                                           const gchar       *name)
+{
+  GimpPlugInProcedure *file_proc;
+  GSList              *list;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), FALSE);
+  g_return_val_if_fail (name != NULL, FALSE);
+
+  if (manager->current_plug_in && manager->current_plug_in->plug_in_def)
+    list = manager->current_plug_in->plug_in_def->procedures;
+  else
+    list = manager->plug_in_procedures;
+
+  file_proc = gimp_plug_in_procedure_find (list, name);
+
+  if (! file_proc)
+    return FALSE;
+
+  gimp_plug_in_procedure_set_handles_raw (file_proc);
+
+  return TRUE;
+}
+
+gboolean
+gimp_plug_in_manager_register_thumb_loader (GimpPlugInManager *manager,
+                                            const gchar       *load_proc,
+                                            const gchar       *thumb_proc)
+{
+  GimpPlugInProcedure *file_proc;
+  GSList              *list;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), FALSE);
+  g_return_val_if_fail (load_proc, FALSE);
+  g_return_val_if_fail (thumb_proc, FALSE);
+
+  if (manager->current_plug_in && manager->current_plug_in->plug_in_def)
+    list = manager->current_plug_in->plug_in_def->procedures;
+  else
+    list = manager->plug_in_procedures;
+
+  file_proc = gimp_plug_in_procedure_find (list, load_proc);
+
+  if (! file_proc)
+    return FALSE;
+
+  gimp_plug_in_procedure_set_thumb_loader (file_proc, thumb_proc);
+
+  return TRUE;
+}
+
+GSList *
+gimp_plug_in_manager_get_file_procedures (GimpPlugInManager      *manager,
+                                          GimpFileProcedureGroup  group)
+{
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), NULL);
+
+  switch (group)
+    {
+    case GIMP_FILE_PROCEDURE_GROUP_NONE:
+      return NULL;
+
+    case GIMP_FILE_PROCEDURE_GROUP_OPEN:
+      return manager->display_load_procs;
+
+    case GIMP_FILE_PROCEDURE_GROUP_SAVE:
+      return manager->display_save_procs;
+
+    case GIMP_FILE_PROCEDURE_GROUP_EXPORT:
+      return manager->display_export_procs;
+
+    default:
+      g_return_val_if_reached (NULL);
+    }
+}
+
+GimpPlugInProcedure *
+gimp_plug_in_manager_file_procedure_find (GimpPlugInManager      *manager,
+                                          GimpFileProcedureGroup  group,
+                                          GFile                  *file,
+                                          GError                **error)
+{
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), NULL);
+  g_return_val_if_fail (G_IS_FILE (file), NULL);
+  g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+  switch (group)
+    {
+    case GIMP_FILE_PROCEDURE_GROUP_OPEN:
+      return file_procedure_find (manager->load_procs, file, error);
+
+    case GIMP_FILE_PROCEDURE_GROUP_SAVE:
+      return file_procedure_find (manager->save_procs, file, error);
+
+    case GIMP_FILE_PROCEDURE_GROUP_EXPORT:
+      return file_procedure_find (manager->export_procs, file, error);
+
+    default:
+      g_return_val_if_reached (NULL);
+    }
+}
+
+GimpPlugInProcedure *
+gimp_plug_in_manager_file_procedure_find_by_prefix (GimpPlugInManager      *manager,
+                                                    GimpFileProcedureGroup  group,
+                                                    GFile                  *file)
+{
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), NULL);
+  g_return_val_if_fail (G_IS_FILE (file), NULL);
+
+  switch (group)
+    {
+    case GIMP_FILE_PROCEDURE_GROUP_OPEN:
+      return file_procedure_find_by_prefix (manager->load_procs, file);
+
+    case GIMP_FILE_PROCEDURE_GROUP_SAVE:
+      return file_procedure_find_by_prefix (manager->save_procs, file);
+
+    case GIMP_FILE_PROCEDURE_GROUP_EXPORT:
+      return file_procedure_find_by_prefix (manager->export_procs, file);
+
+    default:
+      g_return_val_if_reached (NULL);
+    }
+}
+
+GimpPlugInProcedure *
+gimp_plug_in_manager_file_procedure_find_by_extension (GimpPlugInManager      *manager,
+                                                       GimpFileProcedureGroup  group,
+                                                       GFile                  *file)
+{
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), NULL);
+  g_return_val_if_fail (G_IS_FILE (file), NULL);
+
+  switch (group)
+    {
+    case GIMP_FILE_PROCEDURE_GROUP_OPEN:
+      return file_procedure_find_by_extension (manager->load_procs, file);
+
+    case GIMP_FILE_PROCEDURE_GROUP_SAVE:
+      return file_procedure_find_by_extension (manager->save_procs, file);
+
+    case GIMP_FILE_PROCEDURE_GROUP_EXPORT:
+      return file_procedure_find_by_extension (manager->export_procs, file);
+
+    default:
+      g_return_val_if_reached (NULL);
+    }
+}
+
+GimpPlugInProcedure *
+gimp_plug_in_manager_file_procedure_find_by_mime_type (GimpPlugInManager      *manager,
+                                                       GimpFileProcedureGroup  group,
+                                                       const gchar            *mime_type)
+{
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), NULL);
+  g_return_val_if_fail (mime_type != NULL, NULL);
+
+  switch (group)
+    {
+    case GIMP_FILE_PROCEDURE_GROUP_OPEN:
+      return file_procedure_find_by_mime_type (manager->load_procs, mime_type);
+
+    case GIMP_FILE_PROCEDURE_GROUP_SAVE:
+      return file_procedure_find_by_mime_type (manager->save_procs, mime_type);
+
+    case GIMP_FILE_PROCEDURE_GROUP_EXPORT:
+      return file_procedure_find_by_mime_type (manager->export_procs, mime_type);
+
+    default:
+      g_return_val_if_reached (NULL);
+    }
+}
+
+
+/*  private functions  */
+
+static gboolean
+file_procedure_in_group (GimpPlugInProcedure    *file_proc,
+                         GimpFileProcedureGroup  group)
+{
+  const gchar *name        = gimp_object_get_name (file_proc);
+  gboolean     is_xcf_save = FALSE;
+  gboolean     is_filter   = FALSE;
+
+  is_xcf_save = (strcmp (name, "gimp-xcf-save") == 0);
+
+  is_filter   = (strcmp (name, "file-gz-save")  == 0 ||
+                 strcmp (name, "file-bz2-save") == 0 ||
+                 strcmp (name, "file-xz-save")  == 0);
+
+  switch (group)
+    {
+    case GIMP_FILE_PROCEDURE_GROUP_NONE:
+      return FALSE;
+
+    case GIMP_FILE_PROCEDURE_GROUP_SAVE:
+      /* Only .xcf shall pass */
+      return is_xcf_save || is_filter;
+
+    case GIMP_FILE_PROCEDURE_GROUP_EXPORT:
+      /* Anything but .xcf shall pass */
+      return ! is_xcf_save;
+
+    case GIMP_FILE_PROCEDURE_GROUP_OPEN:
+      /* No filter applied for Open */
+      return TRUE;
+
+    default:
+    case GIMP_FILE_PROCEDURE_GROUP_ANY:
+      return TRUE;
+    }
+}
diff --git a/app/plug-in/gimppluginmanager-file.h b/app/plug-in/gimppluginmanager-file.h
new file mode 100644
index 0000000..8408218
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-file.h
@@ -0,0 +1,75 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-file.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_MANAGER_FILE_H__
+#define __GIMP_PLUG_IN_MANAGER_FILE_H__
+
+
+gboolean   gimp_plug_in_manager_register_load_handler (GimpPlugInManager *manager,
+                                                       const gchar       *name,
+                                                       const gchar       *extensions,
+                                                       const gchar       *prefixes,
+                                                       const gchar       *magics);
+gboolean   gimp_plug_in_manager_register_save_handler (GimpPlugInManager *manager,
+                                                       const gchar       *name,
+                                                       const gchar       *extensions,
+                                                       const gchar       *prefixes);
+
+gboolean   gimp_plug_in_manager_register_priority     (GimpPlugInManager *manager,
+                                                       const gchar       *name,
+                                                       gint               priority);
+
+
+gboolean   gimp_plug_in_manager_register_mime_types   (GimpPlugInManager *manager,
+                                                       const gchar       *name,
+                                                       const gchar       *mime_types);
+
+gboolean   gimp_plug_in_manager_register_handles_uri  (GimpPlugInManager *manager,
+                                                       const gchar       *name);
+
+gboolean   gimp_plug_in_manager_register_handles_raw  (GimpPlugInManager *manager,
+                                                       const gchar       *name);
+
+gboolean   gimp_plug_in_manager_register_thumb_loader (GimpPlugInManager *manager,
+                                                       const gchar       *load_proc,
+                                                       const gchar       *thumb_proc);
+
+GSList   * gimp_plug_in_manager_get_file_procedures   (GimpPlugInManager      *manager,
+                                                       GimpFileProcedureGroup  group);
+
+GimpPlugInProcedure *
+gimp_plug_in_manager_file_procedure_find              (GimpPlugInManager      *manager,
+                                                       GimpFileProcedureGroup  group,
+                                                       GFile                  *file,
+                                                       GError                **error);
+GimpPlugInProcedure *
+gimp_plug_in_manager_file_procedure_find_by_prefix    (GimpPlugInManager      *manager,
+                                                       GimpFileProcedureGroup  group,
+                                                       GFile                  *file);
+GimpPlugInProcedure *
+gimp_plug_in_manager_file_procedure_find_by_extension (GimpPlugInManager      *manager,
+                                                       GimpFileProcedureGroup  group,
+                                                       GFile                  *file);
+GimpPlugInProcedure *
+gimp_plug_in_manager_file_procedure_find_by_mime_type (GimpPlugInManager      *manager,
+                                                       GimpFileProcedureGroup  group,
+                                                       const gchar            *mime_type);
+
+
+#endif /* __GIMP_PLUG_IN_MANAGER_FILE_H__ */
diff --git a/app/plug-in/gimppluginmanager-help-domain.c b/app/plug-in/gimppluginmanager-help-domain.c
new file mode 100644
index 0000000..96ea41b
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-help-domain.c
@@ -0,0 +1,160 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-help-domain.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gio/gio.h>
+
+#include "plug-in-types.h"
+
+#include "gimppluginmanager.h"
+#include "gimppluginmanager-help-domain.h"
+
+
+typedef struct _GimpPlugInHelpDomain GimpPlugInHelpDomain;
+
+struct _GimpPlugInHelpDomain
+{
+  GFile *file;
+  gchar *domain_name;
+  gchar *domain_uri;
+};
+
+
+void
+gimp_plug_in_manager_help_domain_exit (GimpPlugInManager *manager)
+{
+  GSList *list;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+
+  for (list = manager->help_domains; list; list = list->next)
+    {
+      GimpPlugInHelpDomain *domain = list->data;
+
+      g_object_unref (domain->file);
+      g_free (domain->domain_name);
+      g_free (domain->domain_uri);
+      g_slice_free (GimpPlugInHelpDomain, domain);
+    }
+
+  g_slist_free (manager->help_domains);
+  manager->help_domains = NULL;
+}
+
+void
+gimp_plug_in_manager_add_help_domain (GimpPlugInManager *manager,
+                                      GFile             *file,
+                                      const gchar       *domain_name,
+                                      const gchar       *domain_uri)
+{
+  GimpPlugInHelpDomain *domain;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (G_IS_FILE (file));
+  g_return_if_fail (domain_name != NULL);
+
+  domain = g_slice_new (GimpPlugInHelpDomain);
+
+  domain->file        = g_object_ref (file);
+  domain->domain_name = g_strdup (domain_name);
+  domain->domain_uri  = g_strdup (domain_uri);
+
+  manager->help_domains = g_slist_prepend (manager->help_domains, domain);
+
+#ifdef VERBOSE
+  g_print ("added help domain \"%s\" for base uri \"%s\"\n",
+           domain->domain_name ? domain->domain_name : "(null)",
+           domain->domain_uri  ? domain->domain_uri  : "(null)");
+#endif
+}
+
+const gchar *
+gimp_plug_in_manager_get_help_domain (GimpPlugInManager  *manager,
+                                      GFile              *file,
+                                      const gchar       **domain_uri)
+{
+  GSList *list;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), NULL);
+  g_return_val_if_fail (file == NULL || G_IS_FILE (file), NULL);
+
+  if (domain_uri)
+    *domain_uri = NULL;
+
+  /*  A NULL prog_name is GIMP itself, return the default domain  */
+  if (! file)
+    return NULL;
+
+  for (list = manager->help_domains; list; list = list->next)
+    {
+      GimpPlugInHelpDomain *domain = list->data;
+
+      if (domain && domain->file &&
+          g_file_equal (domain->file, file))
+        {
+          if (domain_uri && domain->domain_uri)
+            *domain_uri = domain->domain_uri;
+
+          return domain->domain_name;
+        }
+    }
+
+  return NULL;
+}
+
+gint
+gimp_plug_in_manager_get_help_domains (GimpPlugInManager   *manager,
+                                       gchar             ***help_domains,
+                                       gchar             ***help_uris)
+{
+  gint n_domains;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), 0);
+  g_return_val_if_fail (help_domains != NULL, 0);
+  g_return_val_if_fail (help_uris != NULL, 0);
+
+  n_domains = g_slist_length (manager->help_domains);
+
+  if (n_domains > 0)
+    {
+      GSList *list;
+      gint    i;
+
+      *help_domains = g_new0 (gchar *, n_domains + 1);
+      *help_uris    = g_new0 (gchar *, n_domains + 1);
+
+      for (list = manager->help_domains, i = 0; list; list = list->next, i++)
+        {
+          GimpPlugInHelpDomain *domain = list->data;
+
+          (*help_domains)[i] = g_strdup (domain->domain_name);
+          (*help_uris)[i]    = g_strdup (domain->domain_uri);
+        }
+    }
+  else
+    {
+      *help_domains = NULL;
+      *help_uris    = NULL;
+    }
+
+  return n_domains;
+}
diff --git a/app/plug-in/gimppluginmanager-help-domain.h b/app/plug-in/gimppluginmanager-help-domain.h
new file mode 100644
index 0000000..e4f8972
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-help-domain.h
@@ -0,0 +1,43 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-help-domain.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_MANAGER_HELP_DOMAIN_H__
+#define __GIMP_PLUG_IN_MANAGER_HELP_DOMAIN_H__
+
+
+void          gimp_plug_in_manager_help_domain_exit (GimpPlugInManager   *manager);
+
+/* Add a help domain */
+void          gimp_plug_in_manager_add_help_domain  (GimpPlugInManager   *manager,
+                                                     GFile               *file,
+                                                     const gchar         *domain_name,
+                                                     const gchar         *domain_uri);
+
+/* Retrieve a plug-ins help domain */
+const gchar * gimp_plug_in_manager_get_help_domain  (GimpPlugInManager   *manager,
+                                                     GFile               *file,
+                                                     const gchar        **help_uri);
+
+/* Retrieve all help domains */
+gint          gimp_plug_in_manager_get_help_domains (GimpPlugInManager   *manager,
+                                                     gchar             ***help_domains,
+                                                     gchar             ***help_uris);
+
+
+#endif /* __GIMP_PLUG_IN_MANAGER_HELP_DOMAIN_H__ */
diff --git a/app/plug-in/gimppluginmanager-locale-domain.c b/app/plug-in/gimppluginmanager-locale-domain.c
new file mode 100644
index 0000000..ae0433b
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-locale-domain.c
@@ -0,0 +1,180 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-locale-domain.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gio/gio.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "plug-in-types.h"
+
+#include "gimppluginmanager.h"
+#include "gimppluginmanager-locale-domain.h"
+
+
+#define STD_PLUG_INS_LOCALE_DOMAIN GETTEXT_PACKAGE "-std-plug-ins"
+
+
+typedef struct _GimpPlugInLocaleDomain GimpPlugInLocaleDomain;
+
+struct _GimpPlugInLocaleDomain
+{
+  GFile *file;
+  gchar *domain_name;
+  gchar *domain_path;
+};
+
+
+void
+gimp_plug_in_manager_locale_domain_exit (GimpPlugInManager *manager)
+{
+  GSList *list;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+
+  for (list = manager->locale_domains; list; list = list->next)
+    {
+      GimpPlugInLocaleDomain *domain = list->data;
+
+      g_object_unref (domain->file);
+      g_free (domain->domain_name);
+      g_free (domain->domain_path);
+      g_slice_free (GimpPlugInLocaleDomain, domain);
+    }
+
+  g_slist_free (manager->locale_domains);
+  manager->locale_domains = NULL;
+}
+
+void
+gimp_plug_in_manager_add_locale_domain (GimpPlugInManager *manager,
+                                        GFile             *file,
+                                        const gchar       *domain_name,
+                                        const gchar       *domain_path)
+{
+  GimpPlugInLocaleDomain *domain;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (G_IS_FILE (file));
+  g_return_if_fail (domain_name != NULL);
+
+  domain = g_slice_new (GimpPlugInLocaleDomain);
+
+  domain->file        = g_object_ref (file);
+  domain->domain_name = g_strdup (domain_name);
+  domain->domain_path = g_strdup (domain_path);
+
+  manager->locale_domains = g_slist_prepend (manager->locale_domains, domain);
+
+#ifdef VERBOSE
+  g_print ("added locale domain \"%s\" for path \"%s\"\n",
+           domain->domain_name ? domain->domain_name : "(null)",
+           domain->domain_path ?
+           gimp_filename_to_utf8 (domain->domain_path) : "(null)");
+#endif
+}
+
+const gchar *
+gimp_plug_in_manager_get_locale_domain (GimpPlugInManager  *manager,
+                                        GFile              *file,
+                                        const gchar       **domain_path)
+{
+  GSList *list;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), NULL);
+  g_return_val_if_fail (file == NULL || G_IS_FILE (file), NULL);
+
+  if (domain_path)
+    *domain_path = gimp_locale_directory ();
+
+  /*  A NULL prog_name is GIMP itself, return the default domain  */
+  if (! file)
+    return NULL;
+
+  for (list = manager->locale_domains; list; list = list->next)
+    {
+      GimpPlugInLocaleDomain *domain = list->data;
+
+      if (domain && domain->file &&
+          g_file_equal (domain->file, file))
+        {
+          if (domain_path && domain->domain_path)
+            *domain_path = domain->domain_path;
+
+          return domain->domain_name;
+        }
+    }
+
+  return STD_PLUG_INS_LOCALE_DOMAIN;
+}
+
+gint
+gimp_plug_in_manager_get_locale_domains (GimpPlugInManager   *manager,
+                                         gchar             ***locale_domains,
+                                         gchar             ***locale_paths)
+{
+  GSList *list;
+  GSList *unique = NULL;
+  gint    n_domains;
+  gint    i;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), 0);
+  g_return_val_if_fail (locale_domains != NULL, 0);
+  g_return_val_if_fail (locale_paths != NULL, 0);
+
+  for (list = manager->locale_domains; list; list = list->next)
+    {
+      GimpPlugInLocaleDomain *domain = list->data;
+      GSList                 *tmp;
+
+      for (tmp = unique; tmp; tmp = tmp->next)
+        if (! strcmp (domain->domain_name, (const gchar *) tmp->data))
+          break;
+
+      if (! tmp)
+        unique = g_slist_prepend (unique, domain);
+    }
+
+  unique = g_slist_reverse (unique);
+
+  n_domains = g_slist_length (unique) + 1;
+
+  *locale_domains = g_new0 (gchar *, n_domains + 1);
+  *locale_paths   = g_new0 (gchar *, n_domains + 1);
+
+  (*locale_domains)[0] = g_strdup (STD_PLUG_INS_LOCALE_DOMAIN);
+  (*locale_paths)[0]   = g_strdup (gimp_locale_directory ());
+
+  for (list = unique, i = 1; list; list = list->next, i++)
+    {
+      GimpPlugInLocaleDomain *domain = list->data;
+
+      (*locale_domains)[i] = g_strdup (domain->domain_name);
+      (*locale_paths)[i]   = (domain->domain_path ?
+                              g_strdup (domain->domain_path) :
+                              g_strdup (gimp_locale_directory ()));
+    }
+
+  g_slist_free (unique);
+
+  return n_domains;
+}
diff --git a/app/plug-in/gimppluginmanager-locale-domain.h b/app/plug-in/gimppluginmanager-locale-domain.h
new file mode 100644
index 0000000..2061ebe
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-locale-domain.h
@@ -0,0 +1,43 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-locale-domain.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_MANAGER_LOCALE_DOMAIN_H__
+#define __GIMP_PLUG_IN_MANAGER_LOCALE_DOMAIN_H__
+
+
+void          gimp_plug_in_manager_locale_domain_exit (GimpPlugInManager   *manager);
+
+/* Add a locale domain */
+void          gimp_plug_in_manager_add_locale_domain  (GimpPlugInManager   *manager,
+                                                       GFile               *file,
+                                                       const gchar         *domain_name,
+                                                       const gchar         *domain_path);
+
+/* Retrieve a plug-ins locale domain */
+const gchar * gimp_plug_in_manager_get_locale_domain  (GimpPlugInManager   *manager,
+                                                       GFile               *file,
+                                                       const gchar        **locale_path);
+
+/* Retrieve all locale domains */
+gint          gimp_plug_in_manager_get_locale_domains (GimpPlugInManager   *manager,
+                                                       gchar             ***locale_domains,
+                                                       gchar             ***locale_paths);
+
+
+#endif /* __GIMP_PLUG_IN_MANAGER_LOCALE_DOMAIN_H__ */
diff --git a/app/plug-in/gimppluginmanager-menu-branch.c b/app/plug-in/gimppluginmanager-menu-branch.c
new file mode 100644
index 0000000..c15d374
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-menu-branch.c
@@ -0,0 +1,92 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-menu-branch.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gio/gio.h>
+
+#include "plug-in-types.h"
+
+#include "gimppluginmanager.h"
+#include "gimppluginmanager-menu-branch.h"
+#include "plug-in-menu-path.h"
+
+
+/*  public functions  */
+
+void
+gimp_plug_in_manager_menu_branch_exit (GimpPlugInManager *manager)
+{
+  GSList *list;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+
+  for (list = manager->menu_branches; list; list = list->next)
+    {
+      GimpPlugInMenuBranch *branch = list->data;
+
+      g_object_unref (branch->file);
+      g_free (branch->menu_path);
+      g_free (branch->menu_label);
+      g_slice_free (GimpPlugInMenuBranch, branch);
+    }
+
+  g_slist_free (manager->menu_branches);
+  manager->menu_branches = NULL;
+}
+
+void
+gimp_plug_in_manager_add_menu_branch (GimpPlugInManager *manager,
+                                      GFile             *file,
+                                      const gchar       *menu_path,
+                                      const gchar       *menu_label)
+{
+  GimpPlugInMenuBranch *branch;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (G_IS_FILE (file));
+  g_return_if_fail (menu_path != NULL);
+  g_return_if_fail (menu_label != NULL);
+
+  branch = g_slice_new (GimpPlugInMenuBranch);
+
+  branch->file       = g_object_ref (file);
+  branch->menu_path  = plug_in_menu_path_map (menu_path, menu_label);
+  branch->menu_label = g_strdup (menu_label);
+
+  manager->menu_branches = g_slist_append (manager->menu_branches, branch);
+
+  g_signal_emit_by_name (manager, "menu-branch-added",
+                         branch->file,
+                         branch->menu_path,
+                         branch->menu_label);
+
+#ifdef VERBOSE
+  g_print ("added menu branch \"%s\" at path \"%s\"\n",
+           branch->menu_label, branch->menu_path);
+#endif
+}
+
+GSList *
+gimp_plug_in_manager_get_menu_branches (GimpPlugInManager *manager)
+{
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), NULL);
+
+  return manager->menu_branches;
+}
diff --git a/app/plug-in/gimppluginmanager-menu-branch.h b/app/plug-in/gimppluginmanager-menu-branch.h
new file mode 100644
index 0000000..e092d01
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-menu-branch.h
@@ -0,0 +1,42 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-menu-branch.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_MANAGER_MENU_BRANCH_H__
+#define __GIMP_PLUG_IN_MANAGER_MENU_BRANCH_H__
+
+
+struct _GimpPlugInMenuBranch
+{
+  GFile *file;
+  gchar *menu_path;
+  gchar *menu_label;
+};
+
+
+void     gimp_plug_in_manager_menu_branch_exit  (GimpPlugInManager *manager);
+
+/* Add a menu branch */
+void     gimp_plug_in_manager_add_menu_branch   (GimpPlugInManager *manager,
+                                                 GFile             *file,
+                                                 const gchar       *menu_path,
+                                                 const gchar       *menu_label);
+GSList * gimp_plug_in_manager_get_menu_branches (GimpPlugInManager *manager);
+
+
+#endif /* __GIMP_PLUG_IN_MANAGER_MENU_BRANCH_H__ */
diff --git a/app/plug-in/gimppluginmanager-query.c b/app/plug-in/gimppluginmanager-query.c
new file mode 100644
index 0000000..861a89a
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-query.c
@@ -0,0 +1,162 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995-2003 Spencer Kimball and Peter Mattis
+ *
+ * plug-ins-query.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "plug-in-types.h"
+
+#include "gimppluginmanager.h"
+#include "gimppluginmanager-query.h"
+#include "gimppluginprocedure.h"
+
+
+static gboolean
+match_string (GRegex *regex,
+              gchar  *string)
+{
+  return g_regex_match (regex, string, 0, NULL);
+}
+
+gint
+gimp_plug_in_manager_query (GimpPlugInManager   *manager,
+                            const gchar         *search_str,
+                            gchar             ***menu_strs,
+                            gchar             ***accel_strs,
+                            gchar             ***prog_strs,
+                            gchar             ***types_strs,
+                            gchar             ***realname_strs,
+                            gint32             **time_ints)
+{
+  gint32   num_plugins = 0;
+  GSList  *list;
+  GSList  *matched     = NULL;
+  gint     i           = 0;
+  GRegex  *sregex      = NULL;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager), 0);
+  g_return_val_if_fail (menu_strs != NULL, 0);
+  g_return_val_if_fail (accel_strs != NULL, 0);
+  g_return_val_if_fail (prog_strs != NULL, 0);
+  g_return_val_if_fail (types_strs != NULL, 0);
+  g_return_val_if_fail (realname_strs != NULL, 0);
+  g_return_val_if_fail (time_ints != NULL, 0);
+
+  *menu_strs     = NULL;
+  *accel_strs    = NULL;
+  *prog_strs     = NULL;
+  *types_strs    = NULL;
+  *realname_strs = NULL;
+  *time_ints     = NULL;
+
+  if (search_str && ! strlen (search_str))
+    search_str = NULL;
+
+  if (search_str)
+    {
+      sregex = g_regex_new (search_str, G_REGEX_CASELESS | G_REGEX_OPTIMIZE, 0,
+                            NULL);
+      if (! sregex)
+        return 0;
+    }
+
+  /* count number of plugin entries, then allocate arrays of correct size
+   * where we can store the strings.
+   */
+
+  for (list = manager->plug_in_procedures; list; list = g_slist_next (list))
+    {
+      GimpPlugInProcedure *proc = list->data;
+
+      if (proc->file && proc->menu_paths)
+        {
+          gchar *name;
+
+          if (proc->menu_label)
+            {
+              name = proc->menu_label;
+            }
+          else
+            {
+              name = strrchr (proc->menu_paths->data, '/');
+
+              if (name)
+                name = name + 1;
+              else
+                name = proc->menu_paths->data;
+            }
+
+          name = gimp_strip_uline (name);
+
+          if (! search_str || match_string (sregex, name))
+            {
+              num_plugins++;
+              matched = g_slist_prepend (matched, proc);
+            }
+
+          g_free (name);
+        }
+    }
+
+  *menu_strs     = g_new (gchar *, num_plugins);
+  *accel_strs    = g_new (gchar *, num_plugins);
+  *prog_strs     = g_new (gchar *, num_plugins);
+  *types_strs    = g_new (gchar *, num_plugins);
+  *realname_strs = g_new (gchar *, num_plugins);
+  *time_ints     = g_new (gint,    num_plugins);
+
+  matched = g_slist_reverse (matched);
+
+  for (list = matched; list; list = g_slist_next (list))
+    {
+      GimpPlugInProcedure *proc = list->data;
+      gchar               *name;
+
+      if (proc->menu_label)
+        name = g_strdup_printf ("%s/%s",
+                                (gchar *) proc->menu_paths->data,
+                                proc->menu_label);
+      else
+        name = g_strdup (proc->menu_paths->data);
+
+      (*menu_strs)[i]     = gimp_strip_uline (name);
+      (*accel_strs)[i]    = NULL;
+      (*prog_strs)[i]     = g_file_get_path (proc->file);
+      (*types_strs)[i]    = g_strdup (proc->image_types);
+      (*realname_strs)[i] = g_strdup (gimp_object_get_name (proc));
+      (*time_ints)[i]     = proc->mtime;
+
+      g_free (name);
+
+      i++;
+    }
+
+  g_slist_free (matched);
+
+  if (sregex)
+    g_regex_unref (sregex);
+
+  return num_plugins;
+}
diff --git a/app/plug-in/gimppluginmanager-query.h b/app/plug-in/gimppluginmanager-query.h
new file mode 100644
index 0000000..94b78c8
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-query.h
@@ -0,0 +1,34 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-query.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_MANAGER_QUERY_H__
+#define __GIMP_PLUG_IN_MANAGER_QUERY_H__
+
+
+gint   gimp_plug_in_manager_query (GimpPlugInManager   *manager,
+                                   const gchar         *search_str,
+                                   gchar             ***menu_strs,
+                                   gchar             ***accel_strs,
+                                   gchar             ***prog_strs,
+                                   gchar             ***types_strs,
+                                   gchar             ***realname_strs,
+                                   gint32             **time_ints);
+
+
+#endif /* __GIMP_PLUG_IN_MANAGER_QUERY_H__ */
diff --git a/app/plug-in/gimppluginmanager-restore.c b/app/plug-in/gimppluginmanager-restore.c
new file mode 100644
index 0000000..a1f37ec
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-restore.c
@@ -0,0 +1,1065 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995-2002 Spencer Kimball, Peter Mattis, and others
+ *
+ * gimppluginmanager-restore.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpconfig/gimpconfig.h"
+
+#include "plug-in-types.h"
+
+#include "config/gimpcoreconfig.h"
+
+#include "core/gimp.h"
+#include "core/gimp-utils.h"
+
+#include "pdb/gimppdb.h"
+#include "pdb/gimppdbcontext.h"
+
+#include "gimpinterpreterdb.h"
+#include "gimpplugindef.h"
+#include "gimppluginmanager.h"
+#define __YES_I_NEED_GIMP_PLUG_IN_MANAGER_CALL__
+#include "gimppluginmanager-call.h"
+#include "gimppluginmanager-help-domain.h"
+#include "gimppluginmanager-locale-domain.h"
+#include "gimppluginmanager-restore.h"
+#include "gimppluginprocedure.h"
+#include "plug-in-rc.h"
+
+#include "gimp-intl.h"
+
+
+static void    gimp_plug_in_manager_search            (GimpPlugInManager    *manager,
+                                                       GimpInitStatusFunc    status_callback);
+static void    gimp_plug_in_manager_search_directory  (GimpPlugInManager    *manager,
+                                                       GFile                *directory);
+static GFile * gimp_plug_in_manager_get_pluginrc      (GimpPlugInManager    *manager);
+static void    gimp_plug_in_manager_read_pluginrc     (GimpPlugInManager    *manager,
+                                                       GFile                *file,
+                                                       GimpInitStatusFunc    status_callback);
+static void    gimp_plug_in_manager_query_new         (GimpPlugInManager    *manager,
+                                                       GimpContext          *context,
+                                                       GimpInitStatusFunc    status_callback);
+static void    gimp_plug_in_manager_init_plug_ins     (GimpPlugInManager    *manager,
+                                                       GimpContext          *context,
+                                                       GimpInitStatusFunc    status_callback);
+static void    gimp_plug_in_manager_run_extensions    (GimpPlugInManager    *manager,
+                                                       GimpContext          *context,
+                                                       GimpInitStatusFunc    status_callback);
+static void    gimp_plug_in_manager_bind_text_domains (GimpPlugInManager    *manager);
+static void    gimp_plug_in_manager_add_from_file     (GimpPlugInManager    *manager,
+                                                       GFile                *file,
+                                                       guint64               mtime);
+static void    gimp_plug_in_manager_add_from_rc       (GimpPlugInManager    *manager,
+                                                       GimpPlugInDef        *plug_in_def);
+static void    gimp_plug_in_manager_add_to_db         (GimpPlugInManager    *manager,
+                                                       GimpContext          *context,
+                                                       GimpPlugInProcedure  *proc);
+static void    gimp_plug_in_manager_sort_file_procs   (GimpPlugInManager    *manager);
+static gint    gimp_plug_in_manager_file_proc_compare (gconstpointer         a,
+                                                       gconstpointer         b,
+                                                       gpointer              data);
+
+
+
+void
+gimp_plug_in_manager_restore (GimpPlugInManager  *manager,
+                              GimpContext        *context,
+                              GimpInitStatusFunc  status_callback)
+{
+  Gimp   *gimp;
+  GFile  *pluginrc;
+  GSList *list;
+  GError *error = NULL;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (GIMP_IS_CONTEXT (context));
+  g_return_if_fail (status_callback != NULL);
+
+  gimp = manager->gimp;
+
+  /* need a GimpPDBContext for calling gimp_plug_in_manager_run_foo() */
+  context = gimp_pdb_context_new (gimp, context, TRUE);
+
+  /* search for binaries in the plug-in directory path */
+  gimp_plug_in_manager_search (manager, status_callback);
+
+  /* read the pluginrc file for cached data */
+  pluginrc = gimp_plug_in_manager_get_pluginrc (manager);
+
+  gimp_plug_in_manager_read_pluginrc (manager, pluginrc, status_callback);
+
+  /* query any plug-ins that changed since we last wrote out pluginrc */
+  gimp_plug_in_manager_query_new (manager, context, status_callback);
+
+  /* initialize the plug-ins */
+  gimp_plug_in_manager_init_plug_ins (manager, context, status_callback);
+
+  /* add the procedures to manager->plug_in_procedures */
+  for (list = manager->plug_in_defs; list; list = list->next)
+    {
+      GimpPlugInDef *plug_in_def = list->data;
+      GSList        *list2;
+
+      for (list2 = plug_in_def->procedures; list2; list2 = list2->next)
+        {
+          gimp_plug_in_manager_add_procedure (manager, list2->data);
+        }
+    }
+
+  /* write the pluginrc file if necessary */
+  if (manager->write_pluginrc)
+    {
+      if (gimp->be_verbose)
+        g_print ("Writing '%s'\n", gimp_file_get_utf8_name (pluginrc));
+
+      if (! plug_in_rc_write (manager->plug_in_defs, pluginrc, &error))
+        {
+          gimp_message_literal (gimp,
+                                NULL, GIMP_MESSAGE_ERROR, error->message);
+          g_clear_error (&error);
+        }
+
+      manager->write_pluginrc = FALSE;
+    }
+
+  g_object_unref (pluginrc);
+
+  /* create locale and help domain lists */
+  for (list = manager->plug_in_defs; list; list = list->next)
+    {
+      GimpPlugInDef *plug_in_def = list->data;
+
+      if (plug_in_def->locale_domain_name)
+        gimp_plug_in_manager_add_locale_domain (manager,
+                                                plug_in_def->file,
+                                                plug_in_def->locale_domain_name,
+                                                plug_in_def->locale_domain_path);
+      else
+        /* set the default plug-in locale domain */
+        gimp_plug_in_def_set_locale_domain (plug_in_def,
+                                            gimp_plug_in_manager_get_locale_domain (manager,
+                                                                                    plug_in_def->file,
+                                                                                    NULL),
+                                            NULL);
+
+      if (plug_in_def->help_domain_name)
+        gimp_plug_in_manager_add_help_domain (manager,
+                                              plug_in_def->file,
+                                              plug_in_def->help_domain_name,
+                                              plug_in_def->help_domain_uri);
+    }
+
+  /* we're done with the plug-in-defs */
+  g_slist_free_full (manager->plug_in_defs, (GDestroyNotify) g_object_unref);
+  manager->plug_in_defs = NULL;
+
+  /* bind plug-in text domains  */
+  gimp_plug_in_manager_bind_text_domains (manager);
+
+  /* add the plug-in procs to the procedure database */
+  for (list = manager->plug_in_procedures; list; list = list->next)
+    {
+      gimp_plug_in_manager_add_to_db (manager, context, list->data);
+    }
+
+  /* sort the load, save and export procedures, make the raw handler list */
+  gimp_plug_in_manager_sort_file_procs (manager);
+
+  gimp_plug_in_manager_run_extensions (manager, context, status_callback);
+
+  g_object_unref (context);
+}
+
+
+/* search for binaries in the plug-in directory path */
+static void
+gimp_plug_in_manager_search (GimpPlugInManager  *manager,
+                             GimpInitStatusFunc  status_callback)
+{
+  const gchar *path_str;
+  GList       *path;
+  GList       *list;
+
+#ifdef G_OS_WIN32
+  const gchar *pathext = g_getenv ("PATHEXT");
+
+  /*  On Windows, we need to add the known file extensions in PATHEXT. */
+  if (pathext)
+    {
+      gchar *exts;
+
+      exts = gimp_interpreter_db_get_extensions (manager->interpreter_db);
+
+      if (exts)
+        {
+          gchar *value;
+
+          value = g_strconcat (pathext, G_SEARCHPATH_SEPARATOR_S, exts, NULL);
+
+          g_setenv ("PATHEXT", value, TRUE);
+
+          g_free (value);
+          g_free (exts);
+        }
+    }
+#endif /* G_OS_WIN32 */
+
+  status_callback (_("Searching plug-ins"), "", 0.0);
+
+  /* Give automatic tests a chance to use plug-ins from the build
+   * dir
+   */
+  path_str = g_getenv ("GIMP_TESTING_PLUGINDIRS");
+  if (! path_str)
+    path_str = manager->gimp->config->plug_in_path;
+
+  path = gimp_config_path_expand_to_files (path_str, NULL);
+
+  for (list = path; list; list = g_list_next (list))
+    {
+      gimp_plug_in_manager_search_directory (manager, list->data);
+    }
+
+  g_list_free_full (path, (GDestroyNotify) g_object_unref);
+}
+
+static void
+gimp_plug_in_manager_search_directory (GimpPlugInManager *manager,
+                                       GFile             *directory)
+{
+  GFileEnumerator *enumerator;
+
+  enumerator = g_file_enumerate_children (directory,
+                                          G_FILE_ATTRIBUTE_STANDARD_NAME ","
+                                          G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN ","
+                                          G_FILE_ATTRIBUTE_TIME_MODIFIED,
+                                          G_FILE_QUERY_INFO_NONE,
+                                          NULL, NULL);
+  if (enumerator)
+    {
+      GFileInfo *info;
+
+      while ((info = g_file_enumerator_next_file (enumerator, NULL, NULL)))
+        {
+          GFile *child;
+
+          if (g_file_info_get_is_hidden (info))
+            {
+              g_object_unref (info);
+              continue;
+            }
+
+          child = g_file_enumerator_get_child (enumerator, info);
+
+          if (gimp_file_is_executable (child))
+            {
+              guint64 mtime;
+
+              mtime = g_file_info_get_attribute_uint64 (info,
+                                                        G_FILE_ATTRIBUTE_TIME_MODIFIED);
+
+              gimp_plug_in_manager_add_from_file (manager, child, mtime);
+            }
+          else if (g_file_query_file_type (child,
+                                           G_FILE_QUERY_INFO_NONE,
+                                           NULL) == G_FILE_TYPE_DIRECTORY)
+            {
+              /* Search in subdirectory the first executable file with
+               * the same name as the directory (except extension).
+               * We don't search recursively, but only at a single
+               * level and assume that there can be only 1 plugin
+               * inside a directory.
+               */
+              GFileEnumerator *enumerator2;
+
+              enumerator2 = g_file_enumerate_children (child,
+                                                       G_FILE_ATTRIBUTE_STANDARD_NAME ","
+                                                       G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN ","
+                                                       G_FILE_ATTRIBUTE_TIME_MODIFIED,
+                                                       G_FILE_QUERY_INFO_NONE,
+                                                       NULL, NULL);
+              if (enumerator2)
+                {
+                  GFileInfo *info2;
+
+                  while ((info2 = g_file_enumerator_next_file (enumerator2, NULL, NULL)))
+                    {
+                      GFile *child2;
+                      gchar *file_name;
+                      char  *ext;
+
+                      if (g_file_info_get_is_hidden (info2))
+                        {
+                          g_object_unref (info2);
+                          continue;
+                        }
+
+                      child2 = g_file_enumerator_get_child (enumerator2, info2);
+                      file_name = g_strdup (g_file_info_get_name (info2));
+
+                      ext = strrchr (file_name, '.');
+                      if (ext)
+                        *ext = '\0';
+
+                      if (g_strcmp0 (file_name, g_file_info_get_name (info)) == 0 &&
+                          gimp_file_is_executable (child2))
+                        {
+                          guint64 mtime;
+
+                          mtime = g_file_info_get_attribute_uint64 (info2,
+                                                                    G_FILE_ATTRIBUTE_TIME_MODIFIED);
+
+                          gimp_plug_in_manager_add_from_file (manager, child2, mtime);
+
+                          g_free (file_name);
+                          g_object_unref (child2);
+                          g_object_unref (info2);
+                          break;
+                        }
+
+                      g_free (file_name);
+                      g_object_unref (child2);
+                      g_object_unref (info2);
+                    }
+
+                  g_object_unref (enumerator2);
+                }
+            }
+
+          g_object_unref (child);
+          g_object_unref (info);
+        }
+
+      g_object_unref (enumerator);
+    }
+}
+
+static GFile *
+gimp_plug_in_manager_get_pluginrc (GimpPlugInManager *manager)
+{
+  Gimp  *gimp = manager->gimp;
+  GFile *pluginrc;
+
+  if (gimp->config->plug_in_rc_path)
+    {
+      gchar *path = gimp_config_path_expand (gimp->config->plug_in_rc_path,
+                                             TRUE, NULL);
+
+      if (g_path_is_absolute (path))
+        pluginrc = g_file_new_for_path (path);
+      else
+        pluginrc = gimp_directory_file (path, NULL);
+
+      g_free (path);
+    }
+  else
+    {
+      pluginrc = gimp_directory_file ("pluginrc", NULL);
+    }
+
+  return pluginrc;
+}
+
+/* read the pluginrc file for cached data */
+static void
+gimp_plug_in_manager_read_pluginrc (GimpPlugInManager  *manager,
+                                    GFile              *pluginrc,
+                                    GimpInitStatusFunc  status_callback)
+{
+  GSList *rc_defs;
+  GError *error = NULL;
+
+  status_callback (_("Resource configuration"),
+                   gimp_file_get_utf8_name (pluginrc), 0.0);
+
+  if (manager->gimp->be_verbose)
+    g_print ("Parsing '%s'\n", gimp_file_get_utf8_name (pluginrc));
+
+  rc_defs = plug_in_rc_parse (manager->gimp, pluginrc, &error);
+
+  if (rc_defs)
+    {
+      GSList *list;
+
+      for (list = rc_defs; list; list = g_slist_next (list))
+        gimp_plug_in_manager_add_from_rc (manager, list->data); /* consumes list->data */
+
+      g_slist_free (rc_defs);
+    }
+  else if (error)
+    {
+      if (error->code != GIMP_CONFIG_ERROR_OPEN_ENOENT)
+        gimp_message_literal (manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                              error->message);
+
+      g_clear_error (&error);
+    }
+}
+
+/* query any plug-ins that changed since we last wrote out pluginrc */
+static void
+gimp_plug_in_manager_query_new (GimpPlugInManager  *manager,
+                                GimpContext        *context,
+                                GimpInitStatusFunc  status_callback)
+{
+  GSList *list;
+  gint    n_plugins;
+
+  status_callback (_("Querying new Plug-ins"), "", 0.0);
+
+  for (list = manager->plug_in_defs, n_plugins = 0; list; list = list->next)
+    {
+      GimpPlugInDef *plug_in_def = list->data;
+
+      if (plug_in_def->needs_query)
+        n_plugins++;
+    }
+
+  if (n_plugins)
+    {
+      gint nth;
+
+      manager->write_pluginrc = TRUE;
+
+      for (list = manager->plug_in_defs, nth = 0; list; list = list->next)
+        {
+          GimpPlugInDef *plug_in_def = list->data;
+
+          if (plug_in_def->needs_query)
+            {
+              gchar *basename;
+
+              basename =
+                g_path_get_basename (gimp_file_get_utf8_name (plug_in_def->file));
+              status_callback (NULL, basename,
+                               (gdouble) nth++ / (gdouble) n_plugins);
+              g_free (basename);
+
+              if (manager->gimp->be_verbose)
+                g_print ("Querying plug-in: '%s'\n",
+                         gimp_file_get_utf8_name (plug_in_def->file));
+
+              gimp_plug_in_manager_call_query (manager, context, plug_in_def);
+            }
+        }
+    }
+
+  status_callback (NULL, "", 1.0);
+}
+
+/* initialize the plug-ins */
+static void
+gimp_plug_in_manager_init_plug_ins (GimpPlugInManager  *manager,
+                                    GimpContext        *context,
+                                    GimpInitStatusFunc  status_callback)
+{
+  GSList *list;
+  gint    n_plugins;
+
+  status_callback (_("Initializing Plug-ins"), "", 0.0);
+
+  for (list = manager->plug_in_defs, n_plugins = 0; list; list = list->next)
+    {
+      GimpPlugInDef *plug_in_def = list->data;
+
+      if (plug_in_def->has_init)
+        n_plugins++;
+    }
+
+  if (n_plugins)
+    {
+      gint nth;
+
+      for (list = manager->plug_in_defs, nth = 0; list; list = list->next)
+        {
+          GimpPlugInDef *plug_in_def = list->data;
+
+          if (plug_in_def->has_init)
+            {
+              gchar *basename;
+
+              basename =
+                g_path_get_basename (gimp_file_get_utf8_name (plug_in_def->file));
+              status_callback (NULL, basename,
+                               (gdouble) nth++ / (gdouble) n_plugins);
+              g_free (basename);
+
+              if (manager->gimp->be_verbose)
+                g_print ("Initializing plug-in: '%s'\n",
+                         gimp_file_get_utf8_name (plug_in_def->file));
+
+              gimp_plug_in_manager_call_init (manager, context, plug_in_def);
+            }
+        }
+    }
+
+  status_callback (NULL, "", 1.0);
+}
+
+/* run automatically started extensions */
+static void
+gimp_plug_in_manager_run_extensions (GimpPlugInManager  *manager,
+                                     GimpContext        *context,
+                                     GimpInitStatusFunc  status_callback)
+{
+  Gimp   *gimp = manager->gimp;
+  GSList *list;
+  GList  *extensions = NULL;
+  gint    n_extensions;
+
+  /* build list of automatically started extensions */
+  for (list = manager->plug_in_procedures; list; list = list->next)
+    {
+      GimpPlugInProcedure *proc = list->data;
+
+      if (proc->file                                         &&
+          GIMP_PROCEDURE (proc)->proc_type == GIMP_EXTENSION &&
+          GIMP_PROCEDURE (proc)->num_args  == 0)
+        {
+          extensions = g_list_prepend (extensions, proc);
+        }
+    }
+
+  extensions   = g_list_reverse (extensions);
+  n_extensions = g_list_length (extensions);
+
+  /* run the available extensions */
+  if (extensions)
+    {
+      GList *list;
+      gint   nth;
+
+      status_callback (_("Starting Extensions"), "", 0.0);
+
+      for (list = extensions, nth = 0; list; list = g_list_next (list), nth++)
+        {
+          GimpPlugInProcedure *proc = list->data;
+          GimpValueArray      *args;
+          GError              *error = NULL;
+
+          if (gimp->be_verbose)
+            g_print ("Starting extension: '%s'\n", gimp_object_get_name (proc));
+
+          status_callback (NULL, gimp_object_get_name (proc),
+                           (gdouble) nth / (gdouble) n_extensions);
+
+          args = gimp_value_array_new (0);
+
+          gimp_procedure_execute_async (GIMP_PROCEDURE (proc),
+                                        gimp, context, NULL,
+                                        args, NULL, &error);
+
+          gimp_value_array_unref (args);
+
+          if (error)
+            {
+              gimp_message_literal (gimp, NULL, GIMP_MESSAGE_ERROR,
+                                    error->message);
+              g_clear_error (&error);
+            }
+        }
+
+      g_list_free (extensions);
+
+      status_callback (NULL, "", 1.0);
+    }
+}
+
+static void
+gimp_plug_in_manager_bind_text_domains (GimpPlugInManager *manager)
+{
+  gchar **locale_domains;
+  gchar **locale_paths;
+  gint    n_domains;
+  gint    i;
+
+  n_domains = gimp_plug_in_manager_get_locale_domains (manager,
+                                                       &locale_domains,
+                                                       &locale_paths);
+
+  for (i = 0; i < n_domains; i++)
+    {
+      bindtextdomain (locale_domains[i], locale_paths[i]);
+#ifdef HAVE_BIND_TEXTDOMAIN_CODESET
+      bind_textdomain_codeset (locale_domains[i], "UTF-8");
+#endif
+    }
+
+  g_strfreev (locale_domains);
+  g_strfreev (locale_paths);
+}
+
+/**
+ * gimp_plug_in_manager_ignore_plugin_basename:
+ * @basename: Basename to test with
+ *
+ * Checks the environment variable
+ * GIMP_TESTING_PLUGINDIRS_BASENAME_IGNORES for file basenames.
+ *
+ * Returns: %TRUE if @basename was in GIMP_TESTING_PLUGINDIRS_BASENAME_IGNORES
+ **/
+static gboolean
+gimp_plug_in_manager_ignore_plugin_basename (const gchar *plugin_basename)
+{
+  const gchar *ignore_basenames_string;
+  GList       *ignore_basenames;
+  GList       *iter;
+  gboolean     ignore = FALSE;
+
+  ignore_basenames_string = g_getenv ("GIMP_TESTING_PLUGINDIRS_BASENAME_IGNORES");
+  ignore_basenames        = gimp_path_parse (ignore_basenames_string,
+                                             256 /*max_paths*/,
+                                             FALSE /*check*/,
+                                             NULL /*check_failed*/);
+
+  for (iter = ignore_basenames; iter; iter = g_list_next (iter))
+    {
+      const gchar *ignore_basename = iter->data;
+
+      if (g_ascii_strcasecmp (ignore_basename, plugin_basename) == 0)
+        {
+          ignore = TRUE;
+          break;
+        }
+    }
+
+  gimp_path_free (ignore_basenames);
+
+  return ignore;
+}
+
+static void
+gimp_plug_in_manager_add_from_file (GimpPlugInManager *manager,
+                                    GFile             *file,
+                                    guint64            mtime)
+{
+  GimpPlugInDef *plug_in_def;
+  GSList        *list;
+  gchar         *filename;
+  gchar         *basename;
+
+  filename = g_file_get_path (file);
+  basename = g_path_get_basename (filename);
+  g_free (filename);
+
+  /* When we scan build dirs for plug-ins, there will be some
+   * executable files that are not plug-ins that we want to ignore,
+   * for example plug-ins/common/mkgen.pl if
+   * GIMP_TESTING_PLUGINDIRS=plug-ins/common
+   */
+  if (gimp_plug_in_manager_ignore_plugin_basename (basename))
+    {
+      g_free (basename);
+      return;
+    }
+
+  for (list = manager->plug_in_defs; list; list = list->next)
+    {
+      gchar *path;
+      gchar *plug_in_name;
+
+      plug_in_def = list->data;
+
+      path = g_file_get_path (plug_in_def->file);
+      plug_in_name = g_path_get_basename (path);
+      g_free (path);
+
+      if (g_ascii_strcasecmp (basename, plug_in_name) == 0)
+        {
+          g_printerr ("Skipping duplicate plug-in: '%s'\n",
+                      gimp_file_get_utf8_name (file));
+
+          g_free (plug_in_name);
+          g_free (basename);
+
+          return;
+        }
+
+      g_free (plug_in_name);
+    }
+
+  g_free (basename);
+
+  plug_in_def = gimp_plug_in_def_new (file);
+
+  gimp_plug_in_def_set_mtime (plug_in_def, mtime);
+  gimp_plug_in_def_set_needs_query (plug_in_def, TRUE);
+
+  manager->plug_in_defs = g_slist_prepend (manager->plug_in_defs, plug_in_def);
+}
+
+static void
+gimp_plug_in_manager_add_from_rc (GimpPlugInManager *manager,
+                                  GimpPlugInDef     *plug_in_def)
+{
+  GSList *list;
+  gchar  *path1;
+  gchar  *basename1;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (plug_in_def != NULL);
+  g_return_if_fail (plug_in_def->file != NULL);
+
+  path1 = g_file_get_path (plug_in_def->file);
+
+  if (! g_path_is_absolute (path1))
+    {
+      g_warning ("plug_ins_def_add_from_rc: filename not absolute (skipping)");
+      g_object_unref (plug_in_def);
+      g_free (path1);
+      return;
+    }
+
+  basename1 = g_path_get_basename (path1);
+
+  /*  If this is a file load or save plugin, make sure we have
+   *  something for one of the extensions, prefixes, or magic number.
+   *  Other bits of code rely on detecting file plugins by the
+   *  presence of one of these things, but the raw plug-in needs to be
+   *  able to register no extensions, prefixes or magics.
+   */
+  for (list = plug_in_def->procedures; list; list = list->next)
+    {
+      GimpPlugInProcedure *proc = list->data;
+
+      if (! proc->extensions &&
+          ! proc->prefixes   &&
+          ! proc->magics     &&
+          proc->menu_paths   &&
+          (g_str_has_prefix (proc->menu_paths->data, "<Load>") ||
+           g_str_has_prefix (proc->menu_paths->data, "<Save>")))
+        {
+          proc->extensions = g_strdup ("");
+        }
+    }
+
+  /*  Check if the entry mentioned in pluginrc matches an executable
+   *  found in the plug_in_path.
+   */
+  for (list = manager->plug_in_defs; list; list = list->next)
+    {
+      GimpPlugInDef *ondisk_plug_in_def = list->data;
+      gchar         *path2;
+      gchar         *basename2;
+
+      path2 = g_file_get_path (ondisk_plug_in_def->file);
+
+      basename2 = g_path_get_basename (path2);
+
+      g_free (path2);
+
+      if (! strcmp (basename1, basename2))
+        {
+          if (g_file_equal (plug_in_def->file,
+                            ondisk_plug_in_def->file) &&
+              (plug_in_def->mtime == ondisk_plug_in_def->mtime))
+            {
+              /* Use pluginrc entry, deleting on-disk entry */
+              list->data = plug_in_def;
+              g_object_unref (ondisk_plug_in_def);
+            }
+          else
+            {
+              /* Use on-disk entry, deleting pluginrc entry */
+              g_object_unref (plug_in_def);
+            }
+
+          g_free (basename2);
+          g_free (basename1);
+          g_free (path1);
+
+          return;
+        }
+
+      g_free (basename2);
+    }
+
+  g_free (basename1);
+  g_free (path1);
+
+  manager->write_pluginrc = TRUE;
+
+  if (manager->gimp->be_verbose)
+    {
+      g_printerr ("pluginrc lists '%s', but it wasn't found\n",
+                  gimp_file_get_utf8_name (plug_in_def->file));
+    }
+
+  g_object_unref (plug_in_def);
+}
+
+
+static void
+gimp_plug_in_manager_add_to_db (GimpPlugInManager   *manager,
+                                GimpContext         *context,
+                                GimpPlugInProcedure *proc)
+{
+  gimp_pdb_register_procedure (manager->gimp->pdb, GIMP_PROCEDURE (proc));
+
+  if (proc->file_proc)
+    {
+      GimpValueArray *return_vals;
+      GError         *error = NULL;
+
+      if (proc->image_types)
+        {
+          return_vals =
+            gimp_pdb_execute_procedure_by_name (manager->gimp->pdb,
+                                                context, NULL, &error,
+                                                "gimp-register-save-handler",
+                                                G_TYPE_STRING, gimp_object_get_name (proc),
+                                                G_TYPE_STRING, proc->extensions,
+                                                G_TYPE_STRING, proc->prefixes,
+                                                G_TYPE_NONE);
+        }
+      else
+        {
+          return_vals =
+            gimp_pdb_execute_procedure_by_name (manager->gimp->pdb,
+                                                context, NULL, &error,
+                                                "gimp-register-magic-load-handler",
+                                                G_TYPE_STRING, gimp_object_get_name (proc),
+                                                G_TYPE_STRING, proc->extensions,
+                                                G_TYPE_STRING, proc->prefixes,
+                                                G_TYPE_STRING, proc->magics,
+                                                G_TYPE_NONE);
+        }
+
+      gimp_value_array_unref (return_vals);
+
+      if (error)
+        {
+          gimp_message_literal (manager->gimp, NULL, GIMP_MESSAGE_ERROR,
+                                error->message);
+          g_error_free (error);
+        }
+    }
+}
+
+static void
+gimp_plug_in_manager_sort_file_procs (GimpPlugInManager *manager)
+{
+  GimpCoreConfig *config         = manager->gimp->config;
+  GFile          *config_plug_in = NULL;
+  GFile          *raw_plug_in    = NULL;
+  GSList         *list;
+
+  manager->load_procs =
+    g_slist_sort_with_data (manager->load_procs,
+                            gimp_plug_in_manager_file_proc_compare,
+                            GINT_TO_POINTER (FALSE));
+  manager->save_procs =
+    g_slist_sort_with_data (manager->save_procs,
+                            gimp_plug_in_manager_file_proc_compare,
+                            GINT_TO_POINTER (FALSE));
+  manager->export_procs =
+    g_slist_sort_with_data (manager->export_procs,
+                            gimp_plug_in_manager_file_proc_compare,
+                            GINT_TO_POINTER (FALSE));
+
+  g_clear_pointer (&manager->display_load_procs,   g_slist_free);
+  g_clear_pointer (&manager->display_save_procs,   g_slist_free);
+  g_clear_pointer (&manager->display_export_procs, g_slist_free);
+
+  manager->display_load_procs   = g_slist_copy (manager->load_procs);
+  manager->display_save_procs   = g_slist_copy (manager->save_procs);
+  manager->display_export_procs = g_slist_copy (manager->export_procs);
+
+  manager->display_load_procs =
+    g_slist_sort_with_data (manager->display_load_procs,
+                            gimp_plug_in_manager_file_proc_compare,
+                            GINT_TO_POINTER (TRUE));
+  manager->display_save_procs =
+    g_slist_sort_with_data (manager->display_save_procs,
+                            gimp_plug_in_manager_file_proc_compare,
+                            GINT_TO_POINTER (TRUE));
+  manager->display_export_procs =
+    g_slist_sort_with_data (manager->display_export_procs,
+                            gimp_plug_in_manager_file_proc_compare,
+                            GINT_TO_POINTER (TRUE));
+
+  g_clear_pointer (&manager->raw_load_procs,         g_slist_free);
+  g_clear_pointer (&manager->display_raw_load_procs, g_slist_free);
+
+  if (config->import_raw_plug_in)
+    {
+      /* remember the configured raw loader, unless it's the placeholder */
+      if (! strstr (config->import_raw_plug_in, "file-raw-placeholder"))
+        config_plug_in =
+          gimp_file_new_for_config_path (config->import_raw_plug_in,
+                                         NULL);
+    }
+
+  /* make the list of raw loaders, and remember the one configured in
+   * config if found
+   */
+  for (list = manager->load_procs; list; list = g_slist_next (list))
+    {
+      GimpPlugInProcedure *file_proc = list->data;
+
+      if (file_proc->handles_raw)
+        {
+          GFile *file;
+
+          manager->raw_load_procs = g_slist_prepend (manager->raw_load_procs,
+                                                     file_proc);
+
+          file = gimp_plug_in_procedure_get_file (file_proc);
+
+          if (! raw_plug_in  &&
+              config_plug_in &&
+              g_file_equal (config_plug_in, file))
+            {
+              raw_plug_in = file;
+            }
+        }
+    }
+
+  manager->raw_load_procs         = g_slist_reverse (manager->raw_load_procs);
+  manager->display_raw_load_procs = g_slist_copy (manager->raw_load_procs);
+  manager->display_raw_load_procs =
+    g_slist_sort_with_data (manager->display_raw_load_procs,
+                            gimp_plug_in_manager_file_proc_compare,
+                            GINT_TO_POINTER (TRUE));
+
+  if (config_plug_in)
+    g_object_unref (config_plug_in);
+
+  /* if no raw loader was configured, or the configured raw loader
+   * wasn't found, default to the first loader that is not the
+   * placeholder, if any
+   */
+  if (! raw_plug_in && manager->raw_load_procs)
+    {
+      gchar *path;
+
+      for (list = manager->raw_load_procs; list; list = g_slist_next (list))
+        {
+          GimpPlugInProcedure *file_proc = list->data;
+
+          raw_plug_in = gimp_plug_in_procedure_get_file (file_proc);
+
+          path = gimp_file_get_config_path (raw_plug_in, NULL);
+
+          if (! strstr (path, "file-raw-placeholder"))
+            break;
+
+          g_free (path);
+          path = NULL;
+
+          raw_plug_in = NULL;
+        }
+
+      if (! raw_plug_in)
+        {
+          raw_plug_in =
+            gimp_plug_in_procedure_get_file (manager->raw_load_procs->data);
+
+          path = gimp_file_get_config_path (raw_plug_in, NULL);
+        }
+
+      g_object_set (config,
+                    "import-raw-plug-in", path,
+                    NULL);
+
+      g_free (path);
+    }
+
+  /* finally, remove all raw loaders except the configured one from
+   * the list of load_procs
+   */
+  list = manager->load_procs;
+  while (list)
+    {
+      GimpPlugInProcedure *file_proc = list->data;
+
+      list = g_slist_next (list);
+
+      if (file_proc->handles_raw &&
+          ! g_file_equal (gimp_plug_in_procedure_get_file (file_proc),
+                          raw_plug_in))
+        {
+          manager->load_procs =
+            g_slist_remove (manager->load_procs, file_proc);
+          manager->display_load_procs =
+            g_slist_remove (manager->display_load_procs, file_proc);
+        }
+    }
+}
+
+static gint
+gimp_plug_in_manager_file_proc_compare (gconstpointer a,
+                                        gconstpointer b,
+                                        gpointer      data)
+{
+  GimpPlugInProcedure *proc_a  = GIMP_PLUG_IN_PROCEDURE (a);
+  GimpPlugInProcedure *proc_b  = GIMP_PLUG_IN_PROCEDURE (b);
+  gboolean             display = GPOINTER_TO_INT (data);
+  const gchar         *label_a;
+  const gchar         *label_b;
+
+  if (g_str_has_prefix (gimp_file_get_utf8_name (proc_a->file),
+                                                 "gimp-xcf"))
+    {
+      if (! g_str_has_prefix (gimp_file_get_utf8_name (proc_b->file),
+                              "gimp-xcf"))
+        {
+          return -1;
+        }
+    }
+  else if (g_str_has_prefix (gimp_file_get_utf8_name (proc_b->file),
+                             "gimp-xcf"))
+    {
+      return 1;
+    }
+
+  if (! display && proc_a->priority != proc_b->priority)
+    return proc_a->priority - proc_b->priority;
+
+  label_a = gimp_procedure_get_label (GIMP_PROCEDURE (proc_a));
+  label_b = gimp_procedure_get_label (GIMP_PROCEDURE (proc_b));
+
+  if (label_a)
+    {
+      if (label_b)
+        {
+          gint comp = g_utf8_collate (label_a, label_b);
+
+          if (comp)
+            return comp;
+        }
+      else
+        {
+          return -1;
+        }
+    }
+  else if (label_b)
+    {
+      return 1;
+    }
+
+  return strcmp (gimp_object_get_name (proc_a), gimp_object_get_name (proc_b));
+}
diff --git a/app/plug-in/gimppluginmanager-restore.h b/app/plug-in/gimppluginmanager-restore.h
new file mode 100644
index 0000000..0389dcf
--- /dev/null
+++ b/app/plug-in/gimppluginmanager-restore.h
@@ -0,0 +1,29 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager-restore.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_MANAGER_RESTORE_H__
+#define __GIMP_PLUG_IN_MANAGER_RESTORE_H__
+
+
+void    gimp_plug_in_manager_restore (GimpPlugInManager  *manager,
+                                      GimpContext        *context,
+                                      GimpInitStatusFunc  status_callback);
+
+
+#endif  /* __GIMP_PLUG_IN_MANAGER_RESTORE_H__ */
diff --git a/app/plug-in/gimppluginmanager.c b/app/plug-in/gimppluginmanager.c
new file mode 100644
index 0000000..659dd28
--- /dev/null
+++ b/app/plug-in/gimppluginmanager.c
@@ -0,0 +1,426 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995-2002 Spencer Kimball, Peter Mattis, and others
+ *
+ * gimppluginmanager.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpconfig/gimpconfig.h"
+
+#include "plug-in-types.h"
+
+#include "config/gimpcoreconfig.h"
+
+#include "core/gimp.h"
+#include "core/gimp-filter-history.h"
+#include "core/gimp-memsize.h"
+#include "core/gimpmarshal.h"
+
+#include "pdb/gimppdb.h"
+
+#include "gimpenvirontable.h"
+#include "gimpinterpreterdb.h"
+#include "gimpplugin.h"
+#include "gimpplugindebug.h"
+#include "gimpplugindef.h"
+#include "gimppluginmanager.h"
+#include "gimppluginmanager-data.h"
+#include "gimppluginmanager-help-domain.h"
+#include "gimppluginmanager-locale-domain.h"
+#include "gimppluginmanager-menu-branch.h"
+#include "gimppluginshm.h"
+#include "gimptemporaryprocedure.h"
+
+#include "gimp-intl.h"
+
+
+enum
+{
+  PLUG_IN_OPENED,
+  PLUG_IN_CLOSED,
+  MENU_BRANCH_ADDED,
+  LAST_SIGNAL
+};
+
+
+static void     gimp_plug_in_manager_finalize    (GObject    *object);
+
+static gint64   gimp_plug_in_manager_get_memsize (GimpObject *object,
+                                                  gint64     *gui_size);
+
+
+G_DEFINE_TYPE (GimpPlugInManager, gimp_plug_in_manager, GIMP_TYPE_OBJECT)
+
+#define parent_class gimp_plug_in_manager_parent_class
+
+static guint manager_signals[LAST_SIGNAL] = { 0, };
+
+
+static void
+gimp_plug_in_manager_class_init (GimpPlugInManagerClass *klass)
+{
+  GObjectClass    *object_class      = G_OBJECT_CLASS (klass);
+  GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
+
+  manager_signals[PLUG_IN_OPENED] =
+    g_signal_new ("plug-in-opened",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST,
+                  G_STRUCT_OFFSET (GimpPlugInManagerClass,
+                                   plug_in_opened),
+                  NULL, NULL,
+                  gimp_marshal_VOID__OBJECT,
+                  G_TYPE_NONE, 1,
+                  GIMP_TYPE_PLUG_IN);
+
+  manager_signals[PLUG_IN_CLOSED] =
+    g_signal_new ("plug-in-closed",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST,
+                  G_STRUCT_OFFSET (GimpPlugInManagerClass,
+                                   plug_in_closed),
+                  NULL, NULL,
+                  gimp_marshal_VOID__OBJECT,
+                  G_TYPE_NONE, 1,
+                  GIMP_TYPE_PLUG_IN);
+
+  manager_signals[MENU_BRANCH_ADDED] =
+    g_signal_new ("menu-branch-added",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_LAST,
+                  G_STRUCT_OFFSET (GimpPlugInManagerClass,
+                                   menu_branch_added),
+                  NULL, NULL,
+                  gimp_marshal_VOID__OBJECT_STRING_STRING,
+                  G_TYPE_NONE, 3,
+                  G_TYPE_FILE,
+                  G_TYPE_STRING,
+                  G_TYPE_STRING);
+
+  object_class->finalize         = gimp_plug_in_manager_finalize;
+
+  gimp_object_class->get_memsize = gimp_plug_in_manager_get_memsize;
+}
+
+static void
+gimp_plug_in_manager_init (GimpPlugInManager *manager)
+{
+}
+
+static void
+gimp_plug_in_manager_finalize (GObject *object)
+{
+  GimpPlugInManager *manager = GIMP_PLUG_IN_MANAGER (object);
+
+  g_clear_pointer (&manager->load_procs,     g_slist_free);
+  g_clear_pointer (&manager->save_procs,     g_slist_free);
+  g_clear_pointer (&manager->export_procs,   g_slist_free);
+  g_clear_pointer (&manager->raw_load_procs, g_slist_free);
+
+  g_clear_pointer (&manager->display_load_procs,     g_slist_free);
+  g_clear_pointer (&manager->display_save_procs,     g_slist_free);
+  g_clear_pointer (&manager->display_export_procs,   g_slist_free);
+  g_clear_pointer (&manager->display_raw_load_procs, g_slist_free);
+
+  if (manager->plug_in_procedures)
+    {
+      g_slist_free_full (manager->plug_in_procedures,
+                         (GDestroyNotify) g_object_unref);
+      manager->plug_in_procedures = NULL;
+    }
+
+  if (manager->plug_in_defs)
+    {
+      g_slist_free_full (manager->plug_in_defs,
+                         (GDestroyNotify) g_object_unref);
+      manager->plug_in_defs = NULL;
+    }
+
+  g_clear_object (&manager->environ_table);
+  g_clear_object (&manager->interpreter_db);
+
+  g_clear_pointer (&manager->debug, gimp_plug_in_debug_free);
+
+  gimp_plug_in_manager_menu_branch_exit (manager);
+  gimp_plug_in_manager_locale_domain_exit (manager);
+  gimp_plug_in_manager_help_domain_exit (manager);
+  gimp_plug_in_manager_data_free (manager);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gint64
+gimp_plug_in_manager_get_memsize (GimpObject *object,
+                                  gint64     *gui_size)
+{
+  GimpPlugInManager *manager = GIMP_PLUG_IN_MANAGER (object);
+  gint64             memsize = 0;
+
+  memsize += gimp_g_slist_get_memsize_foreach (manager->plug_in_defs,
+                                               (GimpMemsizeFunc)
+                                               gimp_object_get_memsize,
+                                               gui_size);
+
+  memsize += gimp_g_slist_get_memsize (manager->plug_in_procedures, 0);
+  memsize += gimp_g_slist_get_memsize (manager->load_procs, 0);
+  memsize += gimp_g_slist_get_memsize (manager->save_procs, 0);
+  memsize += gimp_g_slist_get_memsize (manager->export_procs, 0);
+  memsize += gimp_g_slist_get_memsize (manager->raw_load_procs, 0);
+  memsize += gimp_g_slist_get_memsize (manager->display_load_procs, 0);
+  memsize += gimp_g_slist_get_memsize (manager->display_save_procs, 0);
+  memsize += gimp_g_slist_get_memsize (manager->display_export_procs, 0);
+  memsize += gimp_g_slist_get_memsize (manager->display_raw_load_procs, 0);
+
+  memsize += gimp_g_slist_get_memsize (manager->menu_branches,  0 /* FIXME */);
+  memsize += gimp_g_slist_get_memsize (manager->locale_domains, 0 /* FIXME */);
+  memsize += gimp_g_slist_get_memsize (manager->help_domains,   0 /* FIXME */);
+
+  memsize += gimp_g_slist_get_memsize_foreach (manager->open_plug_ins,
+                                               (GimpMemsizeFunc)
+                                               gimp_object_get_memsize,
+                                               gui_size);
+  memsize += gimp_g_slist_get_memsize (manager->plug_in_stack, 0);
+
+  memsize += 0; /* FIXME manager->shm */
+  memsize += /* FIXME */ gimp_g_object_get_memsize (G_OBJECT (manager->interpreter_db));
+  memsize += /* FIXME */ gimp_g_object_get_memsize (G_OBJECT (manager->environ_table));
+  memsize += 0; /* FIXME manager->plug_in_debug */
+  memsize += gimp_g_list_get_memsize (manager->data_list, 0 /* FIXME */);
+
+  return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
+                                                                  gui_size);
+}
+
+GimpPlugInManager *
+gimp_plug_in_manager_new (Gimp *gimp)
+{
+  GimpPlugInManager *manager;
+
+  manager = g_object_new (GIMP_TYPE_PLUG_IN_MANAGER, NULL);
+
+  manager->gimp           = gimp;
+  manager->interpreter_db = gimp_interpreter_db_new (gimp->be_verbose);
+  manager->environ_table  = gimp_environ_table_new (gimp->be_verbose);
+
+  return manager;
+}
+
+void
+gimp_plug_in_manager_initialize (GimpPlugInManager  *manager,
+                                 GimpInitStatusFunc  status_callback)
+{
+  GimpCoreConfig *config;
+  GList          *path;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (status_callback != NULL);
+
+  config = manager->gimp->config;
+
+  status_callback (NULL, _("Plug-in Interpreters"), 0.8);
+
+  path = gimp_config_path_expand_to_files (config->interpreter_path, NULL);
+  gimp_interpreter_db_load (manager->interpreter_db, path);
+  g_list_free_full (path, (GDestroyNotify) g_object_unref);
+
+  status_callback (NULL, _("Plug-in Environment"), 0.9);
+
+  path = gimp_config_path_expand_to_files (config->environ_path, NULL);
+  gimp_environ_table_load (manager->environ_table, path);
+  g_list_free_full (path, (GDestroyNotify) g_object_unref);
+
+  /*  allocate a piece of shared memory for use in transporting tiles
+   *  to plug-ins. if we can't allocate a piece of shared memory then
+   *  we'll fall back on sending the data over the pipe.
+   */
+  if (manager->gimp->use_shm)
+    manager->shm = gimp_plug_in_shm_new ();
+
+  manager->debug = gimp_plug_in_debug_new ();
+}
+
+void
+gimp_plug_in_manager_exit (GimpPlugInManager *manager)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+
+  while (manager->open_plug_ins)
+    gimp_plug_in_close (manager->open_plug_ins->data, TRUE);
+
+  /*  need to detach from shared memory, we can't rely on exit()
+   *  cleaning up behind us (see bug #609026)
+   */
+  if (manager->shm)
+    {
+      gimp_plug_in_shm_free (manager->shm);
+      manager->shm = NULL;
+    }
+}
+
+void
+gimp_plug_in_manager_add_procedure (GimpPlugInManager   *manager,
+                                    GimpPlugInProcedure *procedure)
+{
+  GSList *list;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (procedure));
+
+  for (list = manager->plug_in_procedures; list; list = list->next)
+    {
+      GimpPlugInProcedure *tmp_proc = list->data;
+
+      if (strcmp (gimp_object_get_name (procedure),
+                  gimp_object_get_name (tmp_proc)) == 0)
+        {
+          GSList *list2;
+
+          list->data = g_object_ref (procedure);
+
+          g_printerr ("Removing duplicate PDB procedure '%s' "
+                      "registered by '%s'\n",
+                      gimp_object_get_name (tmp_proc),
+                      gimp_file_get_utf8_name (tmp_proc->file));
+
+          /* search the plugin list to see if any plugins had references to
+           * the tmp_proc.
+           */
+          for (list2 = manager->plug_in_defs; list2; list2 = list2->next)
+            {
+              GimpPlugInDef *plug_in_def = list2->data;
+
+              if (g_slist_find (plug_in_def->procedures, tmp_proc))
+                gimp_plug_in_def_remove_procedure (plug_in_def, tmp_proc);
+            }
+
+          /* also remove it from the lists of load, save and export procs */
+          manager->load_procs             = g_slist_remove (manager->load_procs,             tmp_proc);
+          manager->save_procs             = g_slist_remove (manager->save_procs,             tmp_proc);
+          manager->export_procs           = g_slist_remove (manager->export_procs,           tmp_proc);
+          manager->raw_load_procs         = g_slist_remove (manager->raw_load_procs,         tmp_proc);
+          manager->display_load_procs     = g_slist_remove (manager->display_load_procs,     tmp_proc);
+          manager->display_save_procs     = g_slist_remove (manager->display_save_procs,     tmp_proc);
+          manager->display_export_procs   = g_slist_remove (manager->display_export_procs,   tmp_proc);
+          manager->display_raw_load_procs = g_slist_remove (manager->display_raw_load_procs, tmp_proc);
+
+          /* and from the history */
+          gimp_filter_history_remove (manager->gimp, GIMP_PROCEDURE (tmp_proc));
+
+          g_object_unref (tmp_proc);
+
+          return;
+        }
+    }
+
+  manager->plug_in_procedures = g_slist_prepend (manager->plug_in_procedures,
+                                                 g_object_ref (procedure));
+}
+
+void
+gimp_plug_in_manager_add_temp_proc (GimpPlugInManager      *manager,
+                                    GimpTemporaryProcedure *procedure)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (GIMP_IS_TEMPORARY_PROCEDURE (procedure));
+
+  gimp_pdb_register_procedure (manager->gimp->pdb, GIMP_PROCEDURE (procedure));
+
+  manager->plug_in_procedures = g_slist_prepend (manager->plug_in_procedures,
+                                                 g_object_ref (procedure));
+}
+
+void
+gimp_plug_in_manager_remove_temp_proc (GimpPlugInManager      *manager,
+                                       GimpTemporaryProcedure *procedure)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (GIMP_IS_TEMPORARY_PROCEDURE (procedure));
+
+  manager->plug_in_procedures = g_slist_remove (manager->plug_in_procedures,
+                                                procedure);
+
+  gimp_filter_history_remove (manager->gimp,
+                              GIMP_PROCEDURE (procedure));
+
+  gimp_pdb_unregister_procedure (manager->gimp->pdb,
+                                 GIMP_PROCEDURE (procedure));
+
+  g_object_unref (procedure);
+}
+
+void
+gimp_plug_in_manager_add_open_plug_in (GimpPlugInManager *manager,
+                                       GimpPlugIn        *plug_in)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+
+  manager->open_plug_ins = g_slist_prepend (manager->open_plug_ins,
+                                            g_object_ref (plug_in));
+
+  g_signal_emit (manager, manager_signals[PLUG_IN_OPENED], 0,
+                 plug_in);
+}
+
+void
+gimp_plug_in_manager_remove_open_plug_in (GimpPlugInManager *manager,
+                                          GimpPlugIn        *plug_in)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+
+  manager->open_plug_ins = g_slist_remove (manager->open_plug_ins, plug_in);
+
+  g_signal_emit (manager, manager_signals[PLUG_IN_CLOSED], 0,
+                 plug_in);
+
+  g_object_unref (plug_in);
+}
+
+void
+gimp_plug_in_manager_plug_in_push (GimpPlugInManager *manager,
+                                   GimpPlugIn        *plug_in)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+
+  manager->current_plug_in = plug_in;
+
+  manager->plug_in_stack = g_slist_prepend (manager->plug_in_stack,
+                                            manager->current_plug_in);
+}
+
+void
+gimp_plug_in_manager_plug_in_pop (GimpPlugInManager *manager)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_MANAGER (manager));
+
+  if (manager->current_plug_in)
+    manager->plug_in_stack = g_slist_remove (manager->plug_in_stack,
+                                             manager->plug_in_stack->data);
+
+  if (manager->plug_in_stack)
+    manager->current_plug_in = manager->plug_in_stack->data;
+  else
+    manager->current_plug_in = NULL;
+}
diff --git a/app/plug-in/gimppluginmanager.h b/app/plug-in/gimppluginmanager.h
new file mode 100644
index 0000000..11f80b1
--- /dev/null
+++ b/app/plug-in/gimppluginmanager.h
@@ -0,0 +1,118 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginmanager.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_MANAGER_H__
+#define __GIMP_PLUG_IN_MANAGER_H__
+
+
+#include "core/gimpobject.h"
+
+
+#define GIMP_TYPE_PLUG_IN_MANAGER            (gimp_plug_in_manager_get_type ())
+#define GIMP_PLUG_IN_MANAGER(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_PLUG_IN_MANAGER, GimpPlugInManager))
+#define GIMP_PLUG_IN_MANAGER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_PLUG_IN_MANAGER, GimpPlugInManagerClass))
+#define GIMP_IS_PLUG_IN_MANAGER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_PLUG_IN_MANAGER))
+#define GIMP_IS_PLUG_IN_MANAGER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_PLUG_IN_MANAGER))
+
+
+typedef struct _GimpPlugInManagerClass GimpPlugInManagerClass;
+
+struct _GimpPlugInManager
+{
+  GimpObject         parent_instance;
+
+  Gimp              *gimp;
+
+  GSList            *plug_in_defs;
+  gboolean           write_pluginrc;
+
+  GSList            *plug_in_procedures;
+
+  GSList            *load_procs;
+  GSList            *save_procs;
+  GSList            *export_procs;
+  GSList            *raw_load_procs;
+
+  GSList            *display_load_procs;
+  GSList            *display_save_procs;
+  GSList            *display_export_procs;
+  GSList            *display_raw_load_procs;
+
+  GSList            *menu_branches;
+  GSList            *locale_domains;
+  GSList            *help_domains;
+
+  GimpPlugIn        *current_plug_in;
+  GSList            *open_plug_ins;
+  GSList            *plug_in_stack;
+
+  GimpPlugInShm     *shm;
+  GimpInterpreterDB *interpreter_db;
+  GimpEnvironTable  *environ_table;
+  GimpPlugInDebug   *debug;
+  GList             *data_list;
+};
+
+struct _GimpPlugInManagerClass
+{
+  GimpObjectClass  parent_class;
+
+  void (* plug_in_opened)    (GimpPlugInManager *manager,
+                              GimpPlugIn        *plug_in);
+  void (* plug_in_closed)    (GimpPlugInManager *manager,
+                              GimpPlugIn        *plug_in);
+
+  void (* menu_branch_added) (GimpPlugInManager *manager,
+                              GFile             *file,
+                              const gchar       *menu_path,
+                              const gchar       *menu_label);
+};
+
+
+GType               gimp_plug_in_manager_get_type (void) G_GNUC_CONST;
+
+GimpPlugInManager * gimp_plug_in_manager_new      (Gimp                *gimp);
+
+void    gimp_plug_in_manager_initialize           (GimpPlugInManager   *manager,
+                                                   GimpInitStatusFunc   status_callback);
+void    gimp_plug_in_manager_exit                 (GimpPlugInManager   *manager);
+
+/* Register a plug-in. This function is public for file load-save
+ * handlers, which are organized around the plug-in data structure.
+ * This could all be done a little better, but oh well.  -josh
+ */
+void    gimp_plug_in_manager_add_procedure        (GimpPlugInManager   *manager,
+                                                   GimpPlugInProcedure *procedure);
+
+void    gimp_plug_in_manager_add_temp_proc        (GimpPlugInManager      *manager,
+                                                   GimpTemporaryProcedure *procedure);
+void    gimp_plug_in_manager_remove_temp_proc     (GimpPlugInManager      *manager,
+                                                   GimpTemporaryProcedure *procedure);
+
+void    gimp_plug_in_manager_add_open_plug_in     (GimpPlugInManager   *manager,
+                                                   GimpPlugIn          *plug_in);
+void    gimp_plug_in_manager_remove_open_plug_in  (GimpPlugInManager   *manager,
+                                                   GimpPlugIn          *plug_in);
+
+void    gimp_plug_in_manager_plug_in_push         (GimpPlugInManager   *manager,
+                                                   GimpPlugIn          *plug_in);
+void    gimp_plug_in_manager_plug_in_pop          (GimpPlugInManager   *manager);
+
+
+#endif  /* __GIMP_PLUG_IN_MANAGER_H__ */
diff --git a/app/plug-in/gimppluginprocedure.c b/app/plug-in/gimppluginprocedure.c
new file mode 100644
index 0000000..db7d240
--- /dev/null
+++ b/app/plug-in/gimppluginprocedure.c
@@ -0,0 +1,1293 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginprocedure.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "plug-in-types.h"
+
+#include "gegl/gimp-babl-compat.h"
+
+#include "core/gimp.h"
+#include "core/gimp-memsize.h"
+#include "core/gimpdrawable.h"
+#include "core/gimpmarshal.h"
+#include "core/gimpparamspecs.h"
+
+#include "file/file-utils.h"
+
+#define __YES_I_NEED_GIMP_PLUG_IN_MANAGER_CALL__
+#include "gimppluginmanager-call.h"
+
+#include "gimppluginerror.h"
+#include "gimppluginprocedure.h"
+#include "plug-in-menu-path.h"
+
+#include "gimp-intl.h"
+
+
+enum
+{
+  MENU_PATH_ADDED,
+  LAST_SIGNAL
+};
+
+
+static void     gimp_plug_in_procedure_finalize        (GObject        *object);
+
+static gint64   gimp_plug_in_procedure_get_memsize     (GimpObject     *object,
+                                                        gint64         *gui_size);
+
+static gchar  * gimp_plug_in_procedure_get_description (GimpViewable   *viewable,
+                                                        gchar         **tooltip);
+
+static const gchar * gimp_plug_in_procedure_get_label  (GimpProcedure  *procedure);
+static const gchar * gimp_plug_in_procedure_get_menu_label
+                                                       (GimpProcedure  *procedure);
+static const gchar * gimp_plug_in_procedure_get_blurb  (GimpProcedure  *procedure);
+static const gchar * gimp_plug_in_procedure_get_help_id(GimpProcedure  *procedure);
+static gboolean   gimp_plug_in_procedure_get_sensitive (GimpProcedure  *procedure,
+                                                        GimpObject     *object,
+                                                        const gchar  **tooltip);
+static GimpValueArray * gimp_plug_in_procedure_execute (GimpProcedure  *procedure,
+                                                        Gimp           *gimp,
+                                                        GimpContext    *context,
+                                                        GimpProgress   *progress,
+                                                        GimpValueArray *args,
+                                                        GError        **error);
+static void     gimp_plug_in_procedure_execute_async   (GimpProcedure  *procedure,
+                                                        Gimp           *gimp,
+                                                        GimpContext    *context,
+                                                        GimpProgress   *progress,
+                                                        GimpValueArray *args,
+                                                        GimpObject     *display);
+
+static GFile  * gimp_plug_in_procedure_real_get_file   (GimpPlugInProcedure *procedure);
+
+static gboolean gimp_plug_in_procedure_validate_args   (GimpPlugInProcedure *proc,
+                                                        Gimp                *gimp,
+                                                        GimpValueArray      *args,
+                                                        GError             **error);
+
+
+G_DEFINE_TYPE (GimpPlugInProcedure, gimp_plug_in_procedure,
+               GIMP_TYPE_PROCEDURE)
+
+#define parent_class gimp_plug_in_procedure_parent_class
+
+static guint gimp_plug_in_procedure_signals[LAST_SIGNAL] = { 0 };
+
+
+static void
+gimp_plug_in_procedure_class_init (GimpPlugInProcedureClass *klass)
+{
+  GObjectClass       *object_class      = G_OBJECT_CLASS (klass);
+  GimpObjectClass    *gimp_object_class = GIMP_OBJECT_CLASS (klass);
+  GimpViewableClass  *viewable_class    = GIMP_VIEWABLE_CLASS (klass);
+  GimpProcedureClass *proc_class        = GIMP_PROCEDURE_CLASS (klass);
+
+  gimp_plug_in_procedure_signals[MENU_PATH_ADDED] =
+    g_signal_new ("menu-path-added",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpPlugInProcedureClass, menu_path_added),
+                  NULL, NULL,
+                  gimp_marshal_VOID__STRING,
+                  G_TYPE_NONE, 1,
+                  G_TYPE_STRING);
+
+  object_class->finalize            = gimp_plug_in_procedure_finalize;
+
+  gimp_object_class->get_memsize    = gimp_plug_in_procedure_get_memsize;
+
+  viewable_class->default_icon_name = "system-run";
+  viewable_class->get_description   = gimp_plug_in_procedure_get_description;
+
+  proc_class->get_label             = gimp_plug_in_procedure_get_label;
+  proc_class->get_menu_label        = gimp_plug_in_procedure_get_menu_label;
+  proc_class->get_blurb             = gimp_plug_in_procedure_get_blurb;
+  proc_class->get_help_id           = gimp_plug_in_procedure_get_help_id;
+  proc_class->get_sensitive         = gimp_plug_in_procedure_get_sensitive;
+  proc_class->execute               = gimp_plug_in_procedure_execute;
+  proc_class->execute_async         = gimp_plug_in_procedure_execute_async;
+
+  klass->get_file                   = gimp_plug_in_procedure_real_get_file;
+  klass->menu_path_added            = NULL;
+}
+
+static void
+gimp_plug_in_procedure_init (GimpPlugInProcedure *proc)
+{
+  GIMP_PROCEDURE (proc)->proc_type = GIMP_PLUGIN;
+
+  proc->icon_data_length = -1;
+}
+
+static void
+gimp_plug_in_procedure_finalize (GObject *object)
+{
+  GimpPlugInProcedure *proc = GIMP_PLUG_IN_PROCEDURE (object);
+
+  g_object_unref (proc->file);
+  g_free (proc->menu_label);
+
+  g_list_free_full (proc->menu_paths, (GDestroyNotify) g_free);
+
+  g_free (proc->label);
+  g_free (proc->help_id);
+
+  g_free (proc->icon_data);
+  g_free (proc->image_types);
+  g_free (proc->image_types_tooltip);
+
+  g_free (proc->extensions);
+  g_free (proc->prefixes);
+  g_free (proc->magics);
+  g_free (proc->mime_types);
+
+  g_slist_free_full (proc->extensions_list, (GDestroyNotify) g_free);
+  g_slist_free_full (proc->prefixes_list, (GDestroyNotify) g_free);
+  g_slist_free_full (proc->magics_list, (GDestroyNotify) g_free);
+  g_slist_free_full (proc->mime_types_list, (GDestroyNotify) g_free);
+
+  g_free (proc->thumb_loader);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gint64
+gimp_plug_in_procedure_get_memsize (GimpObject *object,
+                                    gint64     *gui_size)
+{
+  GimpPlugInProcedure *proc    = GIMP_PLUG_IN_PROCEDURE (object);
+  gint64               memsize = 0;
+  GList               *list;
+  GSList              *slist;
+
+  memsize += gimp_g_object_get_memsize (G_OBJECT (proc->file));
+  memsize += gimp_string_get_memsize (proc->menu_label);
+
+  for (list = proc->menu_paths; list; list = g_list_next (list))
+    memsize += sizeof (GList) + gimp_string_get_memsize (list->data);
+
+  switch (proc->icon_type)
+    {
+    case GIMP_ICON_TYPE_ICON_NAME:
+    case GIMP_ICON_TYPE_IMAGE_FILE:
+      memsize += gimp_string_get_memsize ((const gchar *) proc->icon_data);
+      break;
+
+    case GIMP_ICON_TYPE_INLINE_PIXBUF:
+      memsize += proc->icon_data_length;
+      break;
+    }
+
+  memsize += gimp_string_get_memsize (proc->extensions);
+  memsize += gimp_string_get_memsize (proc->prefixes);
+  memsize += gimp_string_get_memsize (proc->magics);
+  memsize += gimp_string_get_memsize (proc->mime_types);
+  memsize += gimp_string_get_memsize (proc->thumb_loader);
+
+  for (slist = proc->extensions_list; slist; slist = g_slist_next (slist))
+    memsize += sizeof (GSList) + gimp_string_get_memsize (slist->data);
+
+  for (slist = proc->prefixes_list; slist; slist = g_slist_next (slist))
+    memsize += sizeof (GSList) + gimp_string_get_memsize (slist->data);
+
+  for (slist = proc->magics_list; slist; slist = g_slist_next (slist))
+    memsize += sizeof (GSList) + gimp_string_get_memsize (slist->data);
+
+  for (slist = proc->mime_types_list; slist; slist = g_slist_next (slist))
+    memsize += sizeof (GSList) + gimp_string_get_memsize (slist->data);
+
+  return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
+                                                                  gui_size);
+}
+
+static gchar *
+gimp_plug_in_procedure_get_description (GimpViewable  *viewable,
+                                        gchar        **tooltip)
+{
+  GimpProcedure *procedure = GIMP_PROCEDURE (viewable);
+
+  if (tooltip)
+    *tooltip = g_strdup (gimp_procedure_get_blurb (procedure));
+
+  return g_strdup (gimp_procedure_get_label (procedure));
+}
+
+static const gchar *
+gimp_plug_in_procedure_get_label (GimpProcedure *procedure)
+{
+  GimpPlugInProcedure *proc = GIMP_PLUG_IN_PROCEDURE (procedure);
+  const gchar         *path;
+  gchar               *stripped;
+  gchar               *ellipsis;
+  gchar               *label;
+
+  if (proc->label)
+    return proc->label;
+
+  if (proc->menu_label)
+    path = dgettext (gimp_plug_in_procedure_get_locale_domain (proc),
+                     proc->menu_label);
+  else if (proc->menu_paths)
+    path = dgettext (gimp_plug_in_procedure_get_locale_domain (proc),
+                     proc->menu_paths->data);
+  else
+    return NULL;
+
+  stripped = gimp_strip_uline (path);
+
+  if (proc->menu_label)
+    label = g_strdup (stripped);
+  else
+    label = g_path_get_basename (stripped);
+
+  g_free (stripped);
+
+  ellipsis = strstr (label, "...");
+
+  if (! ellipsis)
+    ellipsis = strstr (label, "\342\200\246" /* U+2026 HORIZONTAL ELLIPSIS */);
+
+  if (ellipsis && ellipsis == (label + strlen (label) - 3))
+    *ellipsis = '\0';
+
+  proc->label = label;
+
+  return proc->label;
+}
+
+static const gchar *
+gimp_plug_in_procedure_get_menu_label (GimpProcedure *procedure)
+{
+  GimpPlugInProcedure *proc = GIMP_PLUG_IN_PROCEDURE (procedure);
+
+  if (proc->menu_label)
+    {
+      return dgettext (gimp_plug_in_procedure_get_locale_domain (proc),
+                       proc->menu_label);
+    }
+  else if (proc->menu_paths)
+    {
+      const gchar *translated;
+
+      translated = dgettext (gimp_plug_in_procedure_get_locale_domain (proc),
+                             proc->menu_paths->data);
+
+      translated = strrchr (translated, '/');
+
+      if (translated)
+        return translated + 1;
+    }
+
+  return GIMP_PROCEDURE_CLASS (parent_class)->get_menu_label (procedure);
+}
+
+static const gchar *
+gimp_plug_in_procedure_get_blurb (GimpProcedure *procedure)
+{
+  GimpPlugInProcedure *proc = GIMP_PLUG_IN_PROCEDURE (procedure);
+
+  /*  do not to pass the empty string to gettext()  */
+  if (procedure->blurb && strlen (procedure->blurb))
+    return dgettext (gimp_plug_in_procedure_get_locale_domain (proc),
+                     procedure->blurb);
+
+  return NULL;
+}
+
+static const gchar *
+gimp_plug_in_procedure_get_help_id (GimpProcedure *procedure)
+{
+  GimpPlugInProcedure *proc = GIMP_PLUG_IN_PROCEDURE (procedure);
+  const gchar         *domain;
+
+  if (proc->help_id)
+    return proc->help_id;
+
+  domain = gimp_plug_in_procedure_get_help_domain (proc);
+
+  if (domain)
+    proc->help_id = g_strconcat (domain, "?", gimp_object_get_name (proc), NULL);
+  else
+    proc->help_id = g_strdup (gimp_object_get_name (proc));
+
+  return proc->help_id;
+}
+
+static gboolean
+gimp_plug_in_procedure_get_sensitive (GimpProcedure  *procedure,
+                                      GimpObject     *object,
+                                      const gchar   **tooltip)
+{
+  GimpPlugInProcedure *proc       = GIMP_PLUG_IN_PROCEDURE (procedure);
+  GimpDrawable        *drawable;
+  GimpImageType        image_type = -1;
+  gboolean             sensitive  = FALSE;
+
+  g_return_val_if_fail (object == NULL || GIMP_IS_DRAWABLE (object), FALSE);
+
+  drawable = GIMP_DRAWABLE (object);
+
+  if (drawable)
+    {
+      const Babl *format = gimp_drawable_get_format (drawable);
+
+      image_type = gimp_babl_format_get_image_type (format);
+    }
+
+  switch (image_type)
+    {
+    case GIMP_RGB_IMAGE:
+      sensitive = proc->image_types_val & GIMP_PLUG_IN_RGB_IMAGE;
+      break;
+    case GIMP_RGBA_IMAGE:
+      sensitive = proc->image_types_val & GIMP_PLUG_IN_RGBA_IMAGE;
+      break;
+    case GIMP_GRAY_IMAGE:
+      sensitive = proc->image_types_val & GIMP_PLUG_IN_GRAY_IMAGE;
+      break;
+    case GIMP_GRAYA_IMAGE:
+      sensitive = proc->image_types_val & GIMP_PLUG_IN_GRAYA_IMAGE;
+      break;
+    case GIMP_INDEXED_IMAGE:
+      sensitive = proc->image_types_val & GIMP_PLUG_IN_INDEXED_IMAGE;
+      break;
+    case GIMP_INDEXEDA_IMAGE:
+      sensitive = proc->image_types_val & GIMP_PLUG_IN_INDEXEDA_IMAGE;
+      break;
+    default:
+      break;
+    }
+
+  if (! sensitive)
+    *tooltip = proc->image_types_tooltip;
+
+  return sensitive ? TRUE : FALSE;
+}
+
+static GimpValueArray *
+gimp_plug_in_procedure_execute (GimpProcedure  *procedure,
+                                Gimp           *gimp,
+                                GimpContext    *context,
+                                GimpProgress   *progress,
+                                GimpValueArray *args,
+                                GError        **error)
+{
+  GimpPlugInProcedure *plug_in_procedure = GIMP_PLUG_IN_PROCEDURE (procedure);
+  GError              *pdb_error         = NULL;
+
+  if (! gimp_plug_in_procedure_validate_args (plug_in_procedure, gimp,
+                                              args, &pdb_error))
+    {
+      GimpValueArray *return_vals;
+
+      return_vals = gimp_procedure_get_return_values (procedure, FALSE,
+                                                      pdb_error);
+      g_propagate_error (error, pdb_error);
+
+      return return_vals;
+    }
+
+  if (procedure->proc_type == GIMP_INTERNAL)
+    return GIMP_PROCEDURE_CLASS (parent_class)->execute (procedure, gimp,
+                                                         context, progress,
+                                                         args, error);
+
+  return gimp_plug_in_manager_call_run (gimp->plug_in_manager,
+                                        context, progress,
+                                        GIMP_PLUG_IN_PROCEDURE (procedure),
+                                        args, TRUE, NULL);
+}
+
+static void
+gimp_plug_in_procedure_execute_async (GimpProcedure  *procedure,
+                                      Gimp           *gimp,
+                                      GimpContext    *context,
+                                      GimpProgress   *progress,
+                                      GimpValueArray *args,
+                                      GimpObject     *display)
+{
+  GimpPlugInProcedure *plug_in_procedure = GIMP_PLUG_IN_PROCEDURE (procedure);
+  GError              *error             = NULL;
+
+  if (gimp_plug_in_procedure_validate_args (plug_in_procedure, gimp,
+                                            args, &error))
+    {
+      GimpValueArray *return_vals;
+
+      return_vals = gimp_plug_in_manager_call_run (gimp->plug_in_manager,
+                                                   context, progress,
+                                                   plug_in_procedure,
+                                                   args, FALSE, display);
+
+      if (return_vals)
+        {
+          gimp_plug_in_procedure_handle_return_values (plug_in_procedure,
+                                                       gimp, progress,
+                                                       return_vals);
+          gimp_value_array_unref (return_vals);
+        }
+    }
+  else
+    {
+      gimp_message_literal (gimp, G_OBJECT (progress), GIMP_MESSAGE_ERROR,
+                            error->message);
+      g_error_free (error);
+    }
+}
+
+static GFile *
+gimp_plug_in_procedure_real_get_file (GimpPlugInProcedure *procedure)
+{
+  return procedure->file;
+}
+
+static gboolean
+gimp_plug_in_procedure_validate_args (GimpPlugInProcedure *proc,
+                                      Gimp                *gimp,
+                                      GimpValueArray      *args,
+                                      GError             **error)
+{
+  if (proc->file_proc && proc->handles_uri)
+    {
+      /*  for file procedures that handle URIs, make sure that the
+       *  passed string actually is an URI, not just a file path
+       *  (bug 758685)
+       */
+      GimpProcedure *procedure = GIMP_PROCEDURE (proc);
+      GValue        *uri_value = NULL;
+
+      if ((procedure->num_args   >= 3)                     &&
+          (procedure->num_values >= 1)                     &&
+          GIMP_IS_PARAM_SPEC_INT32    (procedure->args[0]) &&
+          G_IS_PARAM_SPEC_STRING      (procedure->args[1]) &&
+          G_IS_PARAM_SPEC_STRING      (procedure->args[2]) &&
+          GIMP_IS_PARAM_SPEC_IMAGE_ID (procedure->values[0]))
+        {
+          uri_value = gimp_value_array_index (args, 1);
+        }
+      else if ((procedure->num_args >= 5)                          &&
+               GIMP_IS_PARAM_SPEC_INT32       (procedure->args[0]) &&
+               GIMP_IS_PARAM_SPEC_IMAGE_ID    (procedure->args[1]) &&
+               GIMP_IS_PARAM_SPEC_DRAWABLE_ID (procedure->args[2]) &&
+               G_IS_PARAM_SPEC_STRING         (procedure->args[3]) &&
+               G_IS_PARAM_SPEC_STRING         (procedure->args[4]))
+        {
+          uri_value = gimp_value_array_index (args, 3);
+        }
+
+      if (uri_value)
+        {
+          GFile *file;
+
+          file = file_utils_filename_to_file (gimp,
+                                              g_value_get_string (uri_value),
+                                              error);
+
+          if (! file)
+            return FALSE;
+
+          g_value_take_string (uri_value, g_file_get_uri (file));
+          g_object_unref (file);
+        }
+    }
+
+  return TRUE;
+}
+
+
+/*  public functions  */
+
+GimpProcedure *
+gimp_plug_in_procedure_new (GimpPDBProcType  proc_type,
+                            GFile           *file)
+{
+  GimpPlugInProcedure *proc;
+
+  g_return_val_if_fail (proc_type == GIMP_PLUGIN ||
+                        proc_type == GIMP_EXTENSION, NULL);
+  g_return_val_if_fail (G_IS_FILE (file), NULL);
+
+  proc = g_object_new (GIMP_TYPE_PLUG_IN_PROCEDURE, NULL);
+
+  proc->file = g_object_ref (file);
+
+  GIMP_PROCEDURE (proc)->proc_type = proc_type;
+
+  return GIMP_PROCEDURE (proc);
+}
+
+GimpPlugInProcedure *
+gimp_plug_in_procedure_find (GSList      *list,
+                             const gchar *proc_name)
+{
+  GSList *l;
+
+  for (l = list; l; l = g_slist_next (l))
+    {
+      GimpObject *object = l->data;
+
+      if (! strcmp (proc_name, gimp_object_get_name (object)))
+        return GIMP_PLUG_IN_PROCEDURE (object);
+    }
+
+  return NULL;
+}
+
+GFile *
+gimp_plug_in_procedure_get_file (GimpPlugInProcedure *proc)
+{
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc), NULL);
+
+  return GIMP_PLUG_IN_PROCEDURE_GET_CLASS (proc)->get_file (proc);
+}
+
+void
+gimp_plug_in_procedure_set_locale_domain (GimpPlugInProcedure *proc,
+                                          const gchar         *locale_domain)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  proc->locale_domain = locale_domain ? g_quark_from_string (locale_domain) : 0;
+}
+
+const gchar *
+gimp_plug_in_procedure_get_locale_domain (GimpPlugInProcedure *proc)
+{
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc), NULL);
+
+  return g_quark_to_string (proc->locale_domain);
+}
+
+void
+gimp_plug_in_procedure_set_help_domain (GimpPlugInProcedure *proc,
+                                        const gchar         *help_domain)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  proc->help_domain = help_domain ? g_quark_from_string (help_domain) : 0;
+}
+
+const gchar *
+gimp_plug_in_procedure_get_help_domain (GimpPlugInProcedure *proc)
+{
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc), NULL);
+
+  return g_quark_to_string (proc->help_domain);
+}
+
+gboolean
+gimp_plug_in_procedure_add_menu_path (GimpPlugInProcedure  *proc,
+                                      const gchar          *menu_path,
+                                      GError              **error)
+{
+  GimpProcedure *procedure;
+  gchar         *basename = NULL;
+  const gchar   *required = NULL;
+  gchar         *p;
+  gchar         *mapped_path;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc), FALSE);
+  g_return_val_if_fail (menu_path != NULL, FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+  procedure = GIMP_PROCEDURE (proc);
+
+  p = strchr (menu_path, '>');
+  if (p == NULL || (*(++p) && *p != '/'))
+    {
+      basename = g_path_get_basename (gimp_file_get_utf8_name (proc->file));
+
+      g_set_error (error, GIMP_PLUG_IN_ERROR, GIMP_PLUG_IN_FAILED,
+                   "Plug-in \"%s\"\n(%s)\n"
+                   "attempted to install procedure \"%s\"\n"
+                   "in the invalid menu location \"%s\".\n"
+                   "The menu path must look like either \"<Prefix>\" "
+                   "or \"<Prefix>/path/to/item\".",
+                   basename, gimp_file_get_utf8_name (proc->file),
+                   gimp_object_get_name (proc),
+                   menu_path);
+      goto failure;
+    }
+
+  if (g_str_has_prefix (menu_path, "<Toolbox>") ||
+      g_str_has_prefix (menu_path, "<Image>"))
+    {
+      if ((procedure->num_args < 1) ||
+          ! GIMP_IS_PARAM_SPEC_INT32 (procedure->args[0]))
+        {
+          required = "INT32";
+          goto failure;
+        }
+    }
+  else if (g_str_has_prefix (menu_path, "<Layers>"))
+    {
+      if ((procedure->num_args < 3)                             ||
+          ! GIMP_IS_PARAM_SPEC_INT32       (procedure->args[0]) ||
+          ! GIMP_IS_PARAM_SPEC_IMAGE_ID    (procedure->args[1]) ||
+          ! (G_TYPE_FROM_INSTANCE (procedure->args[2])
+                               == GIMP_TYPE_PARAM_LAYER_ID ||
+             G_TYPE_FROM_INSTANCE (procedure->args[2])
+                               == GIMP_TYPE_PARAM_DRAWABLE_ID))
+        {
+          required = "INT32, IMAGE, (LAYER | DRAWABLE)";
+          goto failure;
+        }
+    }
+  else if (g_str_has_prefix (menu_path, "<Channels>"))
+    {
+      if ((procedure->num_args < 3)                             ||
+          ! GIMP_IS_PARAM_SPEC_INT32       (procedure->args[0]) ||
+          ! GIMP_IS_PARAM_SPEC_IMAGE_ID    (procedure->args[1]) ||
+          ! (G_TYPE_FROM_INSTANCE (procedure->args[2])
+                               == GIMP_TYPE_PARAM_CHANNEL_ID ||
+             G_TYPE_FROM_INSTANCE (procedure->args[2])
+                               == GIMP_TYPE_PARAM_DRAWABLE_ID))
+        {
+          required = "INT32, IMAGE, (CHANNEL | DRAWABLE)";
+          goto failure;
+        }
+    }
+  else if (g_str_has_prefix (menu_path, "<Vectors>"))
+    {
+      if ((procedure->num_args < 3)                            ||
+          ! GIMP_IS_PARAM_SPEC_INT32      (procedure->args[0]) ||
+          ! GIMP_IS_PARAM_SPEC_IMAGE_ID   (procedure->args[1]) ||
+          ! GIMP_IS_PARAM_SPEC_VECTORS_ID (procedure->args[2]))
+        {
+          required = "INT32, IMAGE, VECTORS";
+          goto failure;
+        }
+    }
+  else if (g_str_has_prefix (menu_path, "<Colormap>"))
+    {
+      if ((procedure->num_args < 2)                            ||
+          ! GIMP_IS_PARAM_SPEC_INT32      (procedure->args[0]) ||
+          ! GIMP_IS_PARAM_SPEC_IMAGE_ID   (procedure->args[1]))
+        {
+          required = "INT32, IMAGE";
+          goto failure;
+        }
+    }
+  else if (g_str_has_prefix (menu_path, "<Load>"))
+    {
+      if ((procedure->num_args < 3)                       ||
+          ! GIMP_IS_PARAM_SPEC_INT32 (procedure->args[0]) ||
+          ! G_IS_PARAM_SPEC_STRING   (procedure->args[1]) ||
+          ! G_IS_PARAM_SPEC_STRING   (procedure->args[2]))
+        {
+          required = "INT32, STRING, STRING";
+          goto failure;
+        }
+
+      if ((procedure->num_values < 1) ||
+          ! GIMP_IS_PARAM_SPEC_IMAGE_ID (procedure->values[0]))
+        {
+          required = "IMAGE";
+          goto failure;
+        }
+    }
+  else if (g_str_has_prefix (menu_path, "<Save>"))
+    {
+      if ((procedure->num_args < 5)                             ||
+          ! GIMP_IS_PARAM_SPEC_INT32       (procedure->args[0]) ||
+          ! GIMP_IS_PARAM_SPEC_IMAGE_ID    (procedure->args[1]) ||
+          ! GIMP_IS_PARAM_SPEC_DRAWABLE_ID (procedure->args[2]) ||
+          ! G_IS_PARAM_SPEC_STRING         (procedure->args[3]) ||
+          ! G_IS_PARAM_SPEC_STRING         (procedure->args[4]))
+        {
+          required = "INT32, IMAGE, DRAWABLE, STRING, STRING";
+          goto failure;
+        }
+    }
+  else if (g_str_has_prefix (menu_path, "<Brushes>")        ||
+           g_str_has_prefix (menu_path, "<Dynamics>")       ||
+           g_str_has_prefix (menu_path, "<MyPaintBrushes>") ||
+           g_str_has_prefix (menu_path, "<Gradients>")      ||
+           g_str_has_prefix (menu_path, "<Palettes>")       ||
+           g_str_has_prefix (menu_path, "<Patterns>")       ||
+           g_str_has_prefix (menu_path, "<ToolPresets>")    ||
+           g_str_has_prefix (menu_path, "<Fonts>")          ||
+           g_str_has_prefix (menu_path, "<Buffers>"))
+    {
+      if ((procedure->num_args < 1) ||
+          ! GIMP_IS_PARAM_SPEC_INT32 (procedure->args[0]))
+        {
+          required = "INT32";
+          goto failure;
+        }
+    }
+  else
+    {
+      basename = g_path_get_basename (gimp_file_get_utf8_name (proc->file));
+
+      g_set_error (error, GIMP_PLUG_IN_ERROR, GIMP_PLUG_IN_FAILED,
+                   "Plug-in \"%s\"\n(%s)\n"
+                   "attempted to install procedure \"%s\" "
+                   "in the invalid menu location \"%s\".\n"
+                   "Use either \"<Image>\", "
+                   "\"<Layers>\", \"<Channels>\", \"<Vectors>\", "
+                   "\"<Colormap>\", \"<Brushes>\", \"<Dynamics>\", "
+                   "\"<MyPaintBrushes>\", \"<Gradients>\", \"<Palettes>\", "
+                   "\"<Patterns>\", \"<ToolPresets>\", \"<Fonts>\" "
+                   "or \"<Buffers>\".",
+                   basename, gimp_file_get_utf8_name (proc->file),
+                   gimp_object_get_name (proc),
+                   menu_path);
+      goto failure;
+    }
+
+  g_free (basename);
+
+  mapped_path = plug_in_menu_path_map (menu_path, NULL);
+
+  proc->menu_paths = g_list_append (proc->menu_paths, mapped_path);
+
+  g_signal_emit (proc, gimp_plug_in_procedure_signals[MENU_PATH_ADDED], 0,
+                 mapped_path);
+
+  return TRUE;
+
+ failure:
+  if (required)
+    {
+      gchar *prefix = g_strdup (menu_path);
+
+      p = strchr (prefix, '>') + 1;
+      *p = '\0';
+
+      basename = g_path_get_basename (gimp_file_get_utf8_name (proc->file));
+
+      g_set_error (error, GIMP_PLUG_IN_ERROR, GIMP_PLUG_IN_FAILED,
+                   "Plug-in \"%s\"\n(%s)\n\n"
+                   "attempted to install %s procedure \"%s\" "
+                   "which does not take the standard %s plug-in's "
+                   "arguments: (%s).",
+                   basename, gimp_file_get_utf8_name (proc->file),
+                   prefix, gimp_object_get_name (proc), prefix,
+                   required);
+
+      g_free (prefix);
+    }
+
+  g_free (basename);
+
+  return FALSE;
+}
+
+void
+gimp_plug_in_procedure_set_icon (GimpPlugInProcedure *proc,
+                                 GimpIconType         icon_type,
+                                 const guint8        *icon_data,
+                                 gint                 icon_data_length)
+{
+  guint8 *data_copy = NULL;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  switch (icon_type)
+    {
+    case GIMP_ICON_TYPE_ICON_NAME:
+      data_copy = (guint8 *) g_strdup ((gchar *) icon_data);
+      break;
+
+    case GIMP_ICON_TYPE_INLINE_PIXBUF:
+      data_copy = g_memdup (icon_data, icon_data_length);
+      break;
+
+    case GIMP_ICON_TYPE_IMAGE_FILE:
+      data_copy = (guint8 *) g_strdup ((gchar *) icon_data);
+      break;
+
+    default:
+      g_return_if_reached ();
+    }
+
+  gimp_plug_in_procedure_take_icon (proc, icon_type,
+                                    data_copy, icon_data_length);
+}
+
+void
+gimp_plug_in_procedure_take_icon (GimpPlugInProcedure *proc,
+                                  GimpIconType         icon_type,
+                                  guint8              *icon_data,
+                                  gint                 icon_data_length)
+{
+  const gchar *icon_name   = NULL;
+  GdkPixbuf   *icon_pixbuf = NULL;
+  GError      *error       = NULL;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  if (proc->icon_data)
+    {
+      g_free (proc->icon_data);
+      proc->icon_data_length = -1;
+      proc->icon_data        = NULL;
+    }
+
+  proc->icon_type = icon_type;
+
+  switch (proc->icon_type)
+    {
+    case GIMP_ICON_TYPE_ICON_NAME:
+      proc->icon_data_length = -1;
+      proc->icon_data        = icon_data;
+
+      icon_name = (const gchar *) proc->icon_data;
+      break;
+
+    case GIMP_ICON_TYPE_INLINE_PIXBUF:
+      proc->icon_data_length = icon_data_length;
+      proc->icon_data        = icon_data;
+
+      icon_pixbuf = gdk_pixbuf_new_from_inline (proc->icon_data_length,
+                                                proc->icon_data, TRUE, &error);
+      break;
+
+    case GIMP_ICON_TYPE_IMAGE_FILE:
+      proc->icon_data_length = -1;
+      proc->icon_data        = icon_data;
+
+      icon_pixbuf = gdk_pixbuf_new_from_file ((gchar *) proc->icon_data,
+                                              &error);
+      break;
+    }
+
+  if (! icon_pixbuf && error)
+    {
+      g_printerr ("gimp_plug_in_procedure_take_icon: %s\n", error->message);
+      g_clear_error (&error);
+    }
+
+  gimp_viewable_set_icon_name (GIMP_VIEWABLE (proc), icon_name);
+  g_object_set (proc, "icon-pixbuf", icon_pixbuf, NULL);
+
+  if (icon_pixbuf)
+    g_object_unref (icon_pixbuf);
+}
+
+static GimpPlugInImageType
+image_types_parse (const gchar *name,
+                   const gchar *image_types)
+{
+  const gchar         *type_spec = image_types;
+  GimpPlugInImageType  types     = 0;
+
+  /*  If the plug_in registers with image_type == NULL or "", return 0
+   *  By doing so it won't be touched by plug_in_set_menu_sensitivity()
+   */
+  if (! image_types)
+    return types;
+
+  while (*image_types)
+    {
+      while (*image_types &&
+             ((*image_types == ' ') ||
+              (*image_types == '\t') ||
+              (*image_types == ',')))
+        image_types++;
+
+      if (*image_types)
+        {
+          if (g_str_has_prefix (image_types, "RGBA"))
+            {
+              types |= GIMP_PLUG_IN_RGBA_IMAGE;
+              image_types += strlen ("RGBA");
+            }
+          else if (g_str_has_prefix (image_types, "RGB*"))
+            {
+              types |= GIMP_PLUG_IN_RGB_IMAGE | GIMP_PLUG_IN_RGBA_IMAGE;
+              image_types += strlen ("RGB*");
+            }
+          else if (g_str_has_prefix (image_types, "RGB"))
+            {
+              types |= GIMP_PLUG_IN_RGB_IMAGE;
+              image_types += strlen ("RGB");
+            }
+          else if (g_str_has_prefix (image_types, "GRAYA"))
+            {
+              types |= GIMP_PLUG_IN_GRAYA_IMAGE;
+              image_types += strlen ("GRAYA");
+            }
+          else if (g_str_has_prefix (image_types, "GRAY*"))
+            {
+              types |= GIMP_PLUG_IN_GRAY_IMAGE | GIMP_PLUG_IN_GRAYA_IMAGE;
+              image_types += strlen ("GRAY*");
+            }
+          else if (g_str_has_prefix (image_types, "GRAY"))
+            {
+              types |= GIMP_PLUG_IN_GRAY_IMAGE;
+              image_types += strlen ("GRAY");
+            }
+          else if (g_str_has_prefix (image_types, "INDEXEDA"))
+            {
+              types |= GIMP_PLUG_IN_INDEXEDA_IMAGE;
+              image_types += strlen ("INDEXEDA");
+            }
+          else if (g_str_has_prefix (image_types, "INDEXED*"))
+            {
+              types |= GIMP_PLUG_IN_INDEXED_IMAGE | GIMP_PLUG_IN_INDEXEDA_IMAGE;
+              image_types += strlen ("INDEXED*");
+            }
+          else if (g_str_has_prefix (image_types, "INDEXED"))
+            {
+              types |= GIMP_PLUG_IN_INDEXED_IMAGE;
+              image_types += strlen ("INDEXED");
+            }
+          else if (g_str_has_prefix (image_types, "*"))
+            {
+              types |= (GIMP_PLUG_IN_RGB_IMAGE     | GIMP_PLUG_IN_RGBA_IMAGE  |
+                        GIMP_PLUG_IN_GRAY_IMAGE    | GIMP_PLUG_IN_GRAYA_IMAGE |
+                        GIMP_PLUG_IN_INDEXED_IMAGE | GIMP_PLUG_IN_INDEXEDA_IMAGE);
+              image_types += strlen ("*");
+            }
+          else
+            {
+              g_printerr ("%s: image-type contains unrecognizable parts:"
+                          "'%s'\n", name, type_spec);
+
+              /* skip to next token */
+              while (*image_types &&
+                     *image_types != ' '  &&
+                     *image_types != '\t' &&
+                     *image_types != ',')
+                {
+                  image_types++;
+                }
+            }
+        }
+    }
+
+  return types;
+}
+
+void
+gimp_plug_in_procedure_set_image_types (GimpPlugInProcedure *proc,
+                                        const gchar         *image_types)
+{
+  GList *types = NULL;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  if (proc->image_types)
+    g_free (proc->image_types);
+
+  proc->image_types     = g_strdup (image_types);
+  proc->image_types_val = image_types_parse (gimp_object_get_name (proc),
+                                             proc->image_types);
+
+  g_clear_pointer (&proc->image_types_tooltip, g_free);
+
+  if (proc->image_types_val &
+      (GIMP_PLUG_IN_RGB_IMAGE | GIMP_PLUG_IN_RGBA_IMAGE))
+    {
+      if ((proc->image_types_val & GIMP_PLUG_IN_RGB_IMAGE) &&
+          (proc->image_types_val & GIMP_PLUG_IN_RGBA_IMAGE))
+        {
+          types = g_list_prepend (types, _("RGB"));
+        }
+      else if (proc->image_types_val & GIMP_PLUG_IN_RGB_IMAGE)
+        {
+          types = g_list_prepend (types, _("RGB without alpha"));
+        }
+      else
+        {
+          types = g_list_prepend (types, _("RGB with alpha"));
+        }
+    }
+
+  if (proc->image_types_val &
+      (GIMP_PLUG_IN_GRAY_IMAGE | GIMP_PLUG_IN_GRAYA_IMAGE))
+    {
+      if ((proc->image_types_val & GIMP_PLUG_IN_GRAY_IMAGE) &&
+          (proc->image_types_val & GIMP_PLUG_IN_GRAYA_IMAGE))
+        {
+          types = g_list_prepend (types, _("Grayscale"));
+        }
+      else if (proc->image_types_val & GIMP_PLUG_IN_GRAY_IMAGE)
+        {
+          types = g_list_prepend (types, _("Grayscale without alpha"));
+        }
+      else
+        {
+          types = g_list_prepend (types, _("Grayscale with alpha"));
+        }
+    }
+
+  if (proc->image_types_val &
+      (GIMP_PLUG_IN_INDEXED_IMAGE | GIMP_PLUG_IN_INDEXEDA_IMAGE))
+    {
+      if ((proc->image_types_val & GIMP_PLUG_IN_INDEXED_IMAGE) &&
+          (proc->image_types_val & GIMP_PLUG_IN_INDEXEDA_IMAGE))
+        {
+          types = g_list_prepend (types, _("Indexed"));
+        }
+      else if (proc->image_types_val & GIMP_PLUG_IN_INDEXED_IMAGE)
+        {
+          types = g_list_prepend (types, _("Indexed without alpha"));
+        }
+      else
+        {
+          types = g_list_prepend (types, _("Indexed with alpha"));
+        }
+    }
+
+  if (types)
+    {
+      GString *string;
+      GList   *list;
+
+      types = g_list_reverse (types);
+
+      string = g_string_new (gimp_procedure_get_blurb (GIMP_PROCEDURE (proc)));
+
+      g_string_append (string, "\n\n");
+      g_string_append (string, _("This plug-in only works on the "
+                                 "following layer types:"));
+      g_string_append (string, "\n");
+
+      for (list = types; list; list = g_list_next (list))
+        {
+          g_string_append (string, list->data);
+
+          if (list->next)
+            g_string_append (string, ", ");
+          else
+            g_string_append (string, ".");
+        }
+
+      g_list_free (types);
+
+      proc->image_types_tooltip = g_string_free (string, FALSE);
+    }
+}
+
+static GSList *
+extensions_parse (gchar *extensions)
+{
+  GSList *list = NULL;
+
+  /*  extensions can be NULL.  Avoid calling strtok if it is.  */
+  if (extensions)
+    {
+      gchar *extension;
+      gchar *next_token;
+
+      /*  work on a copy  */
+      extensions = g_strdup (extensions);
+
+      next_token = extensions;
+      extension = strtok (next_token, " \t,");
+
+      while (extension)
+        {
+          list = g_slist_prepend (list, g_strdup (extension));
+          extension = strtok (NULL, " \t,");
+        }
+
+      g_free (extensions);
+    }
+
+  return g_slist_reverse (list);
+}
+
+void
+gimp_plug_in_procedure_set_file_proc (GimpPlugInProcedure *proc,
+                                      const gchar         *extensions,
+                                      const gchar         *prefixes,
+                                      const gchar         *magics)
+{
+  GSList *list;
+
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  proc->file_proc = TRUE;
+
+  /*  extensions  */
+
+  if (proc->extensions != extensions)
+    {
+      if (proc->extensions)
+        g_free (proc->extensions);
+
+      proc->extensions = g_strdup (extensions);
+    }
+
+  if (proc->extensions_list)
+    g_slist_free_full (proc->extensions_list, (GDestroyNotify) g_free);
+
+  proc->extensions_list = extensions_parse (proc->extensions);
+
+  /*  prefixes  */
+
+  if (proc->prefixes != prefixes)
+    {
+      if (proc->prefixes)
+        g_free (proc->prefixes);
+
+      proc->prefixes = g_strdup (prefixes);
+    }
+
+  if (proc->prefixes_list)
+    g_slist_free_full (proc->prefixes_list, (GDestroyNotify) g_free);
+
+  proc->prefixes_list = extensions_parse (proc->prefixes);
+
+  /* don't allow "file:" to be registered as prefix */
+  for (list = proc->prefixes_list; list; list = g_slist_next (list))
+    {
+      const gchar *prefix = list->data;
+
+      if (prefix && strcmp (prefix, "file:") == 0)
+        {
+          g_free (list->data);
+          proc->prefixes_list = g_slist_delete_link (proc->prefixes_list, list);
+          break;
+        }
+    }
+
+  /*  magics  */
+
+  if (proc->magics != magics)
+    {
+      if (proc->magics)
+        g_free (proc->magics);
+
+      proc->magics = g_strdup (magics);
+    }
+
+  if (proc->magics_list)
+    g_slist_free_full (proc->magics_list, (GDestroyNotify) g_free);
+
+  proc->magics_list = extensions_parse (proc->magics);
+}
+
+void
+gimp_plug_in_procedure_set_priority (GimpPlugInProcedure *proc,
+                                     gint                 priority)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  proc->priority = priority;
+}
+
+void
+gimp_plug_in_procedure_set_mime_types (GimpPlugInProcedure *proc,
+                                       const gchar         *mime_types)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  if (proc->mime_types != mime_types)
+    {
+      if (proc->mime_types)
+        g_free (proc->mime_types);
+
+      proc->mime_types = g_strdup (mime_types);
+    }
+
+  if (proc->mime_types_list)
+    g_slist_free_full (proc->mime_types_list, (GDestroyNotify) g_free);
+
+  proc->mime_types_list = extensions_parse (proc->mime_types);
+}
+
+void
+gimp_plug_in_procedure_set_handles_uri (GimpPlugInProcedure *proc)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  proc->handles_uri = TRUE;
+}
+
+void
+gimp_plug_in_procedure_set_handles_raw (GimpPlugInProcedure *proc)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  proc->handles_raw = TRUE;
+}
+
+void
+gimp_plug_in_procedure_set_thumb_loader (GimpPlugInProcedure *proc,
+                                         const gchar         *thumb_loader)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+
+  if (proc->thumb_loader)
+    g_free (proc->thumb_loader);
+
+  proc->thumb_loader = g_strdup (thumb_loader);
+}
+
+void
+gimp_plug_in_procedure_handle_return_values (GimpPlugInProcedure *proc,
+                                             Gimp                *gimp,
+                                             GimpProgress        *progress,
+                                             GimpValueArray      *return_vals)
+{
+  g_return_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (proc));
+  g_return_if_fail (return_vals != NULL);
+
+  if (gimp_value_array_length (return_vals) == 0 ||
+      G_VALUE_TYPE (gimp_value_array_index (return_vals, 0)) !=
+      GIMP_TYPE_PDB_STATUS_TYPE)
+    {
+      return;
+    }
+
+  switch (g_value_get_enum (gimp_value_array_index (return_vals, 0)))
+    {
+    case GIMP_PDB_SUCCESS:
+      break;
+
+    case GIMP_PDB_CALLING_ERROR:
+      if (gimp_value_array_length (return_vals) > 1 &&
+          G_VALUE_HOLDS_STRING (gimp_value_array_index (return_vals, 1)))
+        {
+          gimp_message (gimp, G_OBJECT (progress), GIMP_MESSAGE_ERROR,
+                        _("Calling error for '%s':\n"
+                          "%s"),
+                        gimp_procedure_get_label (GIMP_PROCEDURE (proc)),
+                        g_value_get_string (gimp_value_array_index (return_vals, 1)));
+        }
+      break;
+
+    case GIMP_PDB_EXECUTION_ERROR:
+      if (gimp_value_array_length (return_vals) > 1 &&
+          G_VALUE_HOLDS_STRING (gimp_value_array_index (return_vals, 1)))
+        {
+          gimp_message (gimp, G_OBJECT (progress), GIMP_MESSAGE_ERROR,
+                        _("Execution error for '%s':\n"
+                          "%s"),
+                        gimp_procedure_get_label (GIMP_PROCEDURE (proc)),
+                        g_value_get_string (gimp_value_array_index (return_vals, 1)));
+        }
+      break;
+    }
+}
diff --git a/app/plug-in/gimppluginprocedure.h b/app/plug-in/gimppluginprocedure.h
new file mode 100644
index 0000000..e462040
--- /dev/null
+++ b/app/plug-in/gimppluginprocedure.h
@@ -0,0 +1,140 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginprocedure.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_PROCEDURE_H__
+#define __GIMP_PLUG_IN_PROCEDURE_H__
+
+
+#include "pdb/gimpprocedure.h"
+
+
+#define GIMP_TYPE_PLUG_IN_PROCEDURE            (gimp_plug_in_procedure_get_type ())
+#define GIMP_PLUG_IN_PROCEDURE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_PLUG_IN_PROCEDURE, GimpPlugInProcedure))
+#define GIMP_PLUG_IN_PROCEDURE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_PLUG_IN_PROCEDURE, GimpPlugInProcedureClass))
+#define GIMP_IS_PLUG_IN_PROCEDURE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_PLUG_IN_PROCEDURE))
+#define GIMP_IS_PLUG_IN_PROCEDURE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_PLUG_IN_PROCEDURE))
+#define GIMP_PLUG_IN_PROCEDURE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_PLUG_IN_PROCEDURE, GimpPlugInProcedureClass))
+
+
+typedef struct _GimpPlugInProcedureClass GimpPlugInProcedureClass;
+
+struct _GimpPlugInProcedure
+{
+  GimpProcedure        parent_instance;
+
+  /*  common members  */
+  GFile               *file;
+  GQuark               locale_domain;
+  GQuark               help_domain;
+  gchar               *menu_label;
+  GList               *menu_paths;
+  gchar               *label;
+  gchar               *help_id;
+  GimpIconType         icon_type;
+  gint                 icon_data_length;
+  guint8              *icon_data;
+  gchar               *image_types;
+  GimpPlugInImageType  image_types_val;
+  gchar               *image_types_tooltip;
+  gint64               mtime;
+  gboolean             installed_during_init;
+
+  /*  file proc specific members  */
+  gboolean             file_proc;
+  gchar               *extensions;
+  gchar               *prefixes;
+  gchar               *magics;
+  gint                 priority;
+  gchar               *mime_types;
+  gboolean             handles_uri;
+  gboolean             handles_raw;
+  GSList              *extensions_list;
+  GSList              *prefixes_list;
+  GSList              *magics_list;
+  GSList              *mime_types_list;
+  gchar               *thumb_loader;
+};
+
+struct _GimpPlugInProcedureClass
+{
+  GimpProcedureClass parent_class;
+
+  /*  virtual functions  */
+  GFile * (* get_file)        (GimpPlugInProcedure *procedure);
+
+  /*  signals  */
+  void    (* menu_path_added) (GimpPlugInProcedure *procedure,
+                               const gchar         *menu_path);
+};
+
+
+GType           gimp_plug_in_procedure_get_type        (void) G_GNUC_CONST;
+
+GimpProcedure * gimp_plug_in_procedure_new             (GimpPDBProcType      proc_type,
+                                                        GFile               *file);
+
+GimpPlugInProcedure * gimp_plug_in_procedure_find      (GSList              *list,
+                                                        const gchar         *proc_name);
+
+GFile       * gimp_plug_in_procedure_get_file          (GimpPlugInProcedure *proc);
+
+void          gimp_plug_in_procedure_set_locale_domain (GimpPlugInProcedure *proc,
+                                                        const gchar         *locale_domain);
+const gchar * gimp_plug_in_procedure_get_locale_domain (GimpPlugInProcedure *proc);
+
+void          gimp_plug_in_procedure_set_help_domain   (GimpPlugInProcedure *proc,
+                                                        const gchar         *help_domain);
+const gchar * gimp_plug_in_procedure_get_help_domain   (GimpPlugInProcedure *proc);
+
+gboolean      gimp_plug_in_procedure_add_menu_path     (GimpPlugInProcedure *proc,
+                                                        const gchar         *menu_path,
+                                                        GError             **error);
+
+void          gimp_plug_in_procedure_set_icon          (GimpPlugInProcedure *proc,
+                                                        GimpIconType         type,
+                                                        const guint8        *data,
+                                                        gint                 data_length);
+void          gimp_plug_in_procedure_take_icon         (GimpPlugInProcedure *proc,
+                                                        GimpIconType         type,
+                                                        guint8              *data,
+                                                        gint                 data_length);
+
+void          gimp_plug_in_procedure_set_image_types   (GimpPlugInProcedure *proc,
+                                                        const gchar         *image_types);
+void          gimp_plug_in_procedure_set_file_proc     (GimpPlugInProcedure *proc,
+                                                        const gchar         *extensions,
+                                                        const gchar         *prefixes,
+                                                        const gchar         *magics);
+void          gimp_plug_in_procedure_set_priority      (GimpPlugInProcedure *proc,
+                                                        gint                 priority);
+void          gimp_plug_in_procedure_set_mime_types    (GimpPlugInProcedure *proc,
+                                                        const gchar         *mime_ypes);
+void          gimp_plug_in_procedure_set_handles_uri   (GimpPlugInProcedure *proc);
+void          gimp_plug_in_procedure_set_handles_raw   (GimpPlugInProcedure *proc);
+void          gimp_plug_in_procedure_set_thumb_loader  (GimpPlugInProcedure *proc,
+                                                        const gchar         *thumbnailer);
+
+void       gimp_plug_in_procedure_handle_return_values (GimpPlugInProcedure *proc,
+                                                        Gimp                *gimp,
+                                                        GimpProgress        *progress,
+
+                                                        GimpValueArray      *return_vals);
+
+
+#endif /* __GIMP_PLUG_IN_PROCEDURE_H__ */
diff --git a/app/plug-in/gimppluginprocframe.c b/app/plug-in/gimppluginprocframe.c
new file mode 100644
index 0000000..10445ef
--- /dev/null
+++ b/app/plug-in/gimppluginprocframe.c
@@ -0,0 +1,200 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginprocframe.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "plug-in-types.h"
+
+#include "core/gimpprogress.h"
+
+#include "pdb/gimppdbcontext.h"
+#include "pdb/gimppdberror.h"
+
+#include "gimpplugin.h"
+#include "gimpplugin-cleanup.h"
+#include "gimpplugin-progress.h"
+#include "gimppluginprocedure.h"
+
+#include "gimp-intl.h"
+
+
+/*  public functions  */
+
+GimpPlugInProcFrame *
+gimp_plug_in_proc_frame_new (GimpContext         *context,
+                             GimpProgress        *progress,
+                             GimpPlugInProcedure *procedure)
+{
+  GimpPlugInProcFrame *proc_frame;
+
+  g_return_val_if_fail (GIMP_IS_PDB_CONTEXT (context), NULL);
+  g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
+  g_return_val_if_fail (GIMP_IS_PLUG_IN_PROCEDURE (procedure), NULL);
+
+  proc_frame = g_slice_new0 (GimpPlugInProcFrame);
+
+  proc_frame->ref_count = 1;
+
+  gimp_plug_in_proc_frame_init (proc_frame, context, progress, procedure);
+
+  return proc_frame;
+}
+
+void
+gimp_plug_in_proc_frame_init (GimpPlugInProcFrame *proc_frame,
+                              GimpContext         *context,
+                              GimpProgress        *progress,
+                              GimpPlugInProcedure *procedure)
+{
+  g_return_if_fail (proc_frame != NULL);
+  g_return_if_fail (GIMP_IS_PDB_CONTEXT (context));
+  g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));
+  g_return_if_fail (procedure == NULL ||
+                    GIMP_IS_PLUG_IN_PROCEDURE (procedure));
+
+  proc_frame->main_context       = g_object_ref (context);
+  proc_frame->context_stack      = NULL;
+  proc_frame->procedure          = procedure ? g_object_ref (GIMP_PROCEDURE (procedure)) : NULL;
+  proc_frame->main_loop          = NULL;
+  proc_frame->return_vals        = NULL;
+  proc_frame->progress           = progress ? g_object_ref (progress) : NULL;
+  proc_frame->progress_created   = FALSE;
+  proc_frame->progress_cancel_id = 0;
+  proc_frame->error_handler      = GIMP_PDB_ERROR_HANDLER_INTERNAL;
+
+  if (progress)
+    gimp_plug_in_progress_attach (progress);
+}
+
+void
+gimp_plug_in_proc_frame_dispose (GimpPlugInProcFrame *proc_frame,
+                                 GimpPlugIn          *plug_in)
+{
+  g_return_if_fail (proc_frame != NULL);
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+
+  if (proc_frame->progress)
+    {
+      gimp_plug_in_progress_end (plug_in, proc_frame);
+
+      g_clear_object (&proc_frame->progress);
+    }
+
+  if (proc_frame->context_stack)
+    {
+      g_list_free_full (proc_frame->context_stack,
+                        (GDestroyNotify) g_object_unref);
+      proc_frame->context_stack = NULL;
+    }
+
+  g_clear_object (&proc_frame->main_context);
+  g_clear_pointer (&proc_frame->return_vals, gimp_value_array_unref);
+  g_clear_pointer (&proc_frame->main_loop, g_main_loop_unref);
+
+  if (proc_frame->image_cleanups || proc_frame->item_cleanups)
+    gimp_plug_in_cleanup (plug_in, proc_frame);
+
+  g_clear_object (&proc_frame->procedure);
+}
+
+GimpPlugInProcFrame *
+gimp_plug_in_proc_frame_ref (GimpPlugInProcFrame *proc_frame)
+{
+  g_return_val_if_fail (proc_frame != NULL, NULL);
+
+  proc_frame->ref_count++;
+
+  return proc_frame;
+}
+
+void
+gimp_plug_in_proc_frame_unref (GimpPlugInProcFrame *proc_frame,
+                               GimpPlugIn          *plug_in)
+{
+  g_return_if_fail (proc_frame != NULL);
+  g_return_if_fail (GIMP_IS_PLUG_IN (plug_in));
+
+  proc_frame->ref_count--;
+
+  if (proc_frame->ref_count < 1)
+    {
+      gimp_plug_in_proc_frame_dispose (proc_frame, plug_in);
+      g_slice_free (GimpPlugInProcFrame, proc_frame);
+    }
+}
+
+GimpValueArray *
+gimp_plug_in_proc_frame_get_return_values (GimpPlugInProcFrame *proc_frame)
+{
+  GimpValueArray *return_vals;
+
+  g_return_val_if_fail (proc_frame != NULL, NULL);
+
+  if (proc_frame->return_vals)
+    {
+      if (gimp_value_array_length (proc_frame->return_vals) >=
+          proc_frame->procedure->num_values + 1)
+        {
+          return_vals = proc_frame->return_vals;
+        }
+      else
+        {
+          /* Allocate new return values of the correct size. */
+          return_vals = gimp_procedure_get_return_values (proc_frame->procedure,
+                                                          TRUE, NULL);
+
+          /* Copy all of the arguments we can. */
+          memcpy (gimp_value_array_index (return_vals, 0),
+                  gimp_value_array_index (proc_frame->return_vals, 0),
+                  sizeof (GValue) *
+                  gimp_value_array_length (proc_frame->return_vals));
+
+          /* Free the old arguments. */
+          memset (gimp_value_array_index (proc_frame->return_vals, 0), 0,
+                  sizeof (GValue) *
+                  gimp_value_array_length (proc_frame->return_vals));
+          gimp_value_array_unref (proc_frame->return_vals);
+        }
+
+      /* We have consumed any saved values, so clear them. */
+      proc_frame->return_vals = NULL;
+    }
+  else
+    {
+      GimpProcedure *procedure = proc_frame->procedure;
+      GError        *error;
+
+      error = g_error_new (GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_RETURN_VALUE,
+                           _("Procedure '%s' returned no return values"),
+                           gimp_object_get_name (procedure));
+
+      return_vals = gimp_procedure_get_return_values (procedure, FALSE,
+                                                      error);
+      g_error_free (error);
+    }
+
+  return return_vals;
+}
diff --git a/app/plug-in/gimppluginprocframe.h b/app/plug-in/gimppluginprocframe.h
new file mode 100644
index 0000000..1f21b8e
--- /dev/null
+++ b/app/plug-in/gimppluginprocframe.h
@@ -0,0 +1,67 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginprocframe.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_PROC_FRAME_H__
+#define __GIMP_PLUG_IN_PROC_FRAME_H__
+
+
+struct _GimpPlugInProcFrame
+{
+  gint                 ref_count;
+
+  GimpContext         *main_context;
+  GList               *context_stack;
+
+  GimpProcedure       *procedure;
+  GMainLoop           *main_loop;
+
+  GimpValueArray      *return_vals;
+
+  GimpProgress        *progress;
+  gboolean             progress_created;
+  gulong               progress_cancel_id;
+
+  GimpPDBErrorHandler  error_handler;
+
+  /*  lists of things to clean up on dispose  */
+  GList               *image_cleanups;
+  GList               *item_cleanups;
+};
+
+
+GimpPlugInProcFrame * gimp_plug_in_proc_frame_new     (GimpContext         *context,
+                                                       GimpProgress        *progress,
+                                                       GimpPlugInProcedure *procedure);
+void                  gimp_plug_in_proc_frame_init    (GimpPlugInProcFrame *proc_frame,
+                                                       GimpContext         *context,
+                                                       GimpProgress        *progress,
+                                                       GimpPlugInProcedure *procedure);
+
+void                  gimp_plug_in_proc_frame_dispose (GimpPlugInProcFrame *proc_frame,
+                                                       GimpPlugIn          *plug_in);
+
+GimpPlugInProcFrame * gimp_plug_in_proc_frame_ref     (GimpPlugInProcFrame *proc_frame);
+void                  gimp_plug_in_proc_frame_unref   (GimpPlugInProcFrame *proc_frame,
+                                                       GimpPlugIn          *plug_in);
+
+GimpValueArray      * gimp_plug_in_proc_frame_get_return_values
+                                                      (GimpPlugInProcFrame *proc_frame);
+
+
+#endif /* __GIMP_PLUG_IN_PROC_FRAME_H__ */
diff --git a/app/plug-in/gimppluginshm.c b/app/plug-in/gimppluginshm.c
new file mode 100644
index 0000000..5e1e29c
--- /dev/null
+++ b/app/plug-in/gimppluginshm.c
@@ -0,0 +1,301 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginhsm.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <sys/types.h>
+
+#include <errno.h>
+
+#if defined(USE_SYSV_SHM)
+
+#ifdef HAVE_IPC_H
+#include <sys/ipc.h>
+#endif
+
+#ifdef HAVE_SHM_H
+#include <sys/shm.h>
+#endif
+
+#elif defined(USE_POSIX_SHM)
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <fcntl.h>
+#include <sys/mman.h>
+
+#endif /* USE_POSIX_SHM */
+
+#include <gio/gio.h>
+#include <gegl.h>
+
+#if defined(G_OS_WIN32) || defined(G_WITH_CYGWIN)
+
+#define STRICT
+#include <windows.h>
+#include <process.h>
+
+#ifdef G_OS_WIN32
+#include <fcntl.h>
+#include <io.h>
+#endif
+
+#define USE_WIN32_SHM 1
+
+#endif /* G_OS_WIN32 || G_WITH_CYGWIN */
+
+#include "plug-in-types.h"
+
+#include "core/gimp-utils.h"
+
+#include "gimppluginshm.h"
+
+#include "gimp-log.h"
+
+
+#define TILE_MAP_SIZE (GIMP_PLUG_IN_TILE_WIDTH * GIMP_PLUG_IN_TILE_HEIGHT * 32)
+
+#define ERRMSG_SHM_DISABLE "Disabling shared memory tile transport"
+
+
+struct _GimpPlugInShm
+{
+  gint    shm_ID;
+  guchar *shm_addr;
+
+#if defined(USE_WIN32_SHM)
+  HANDLE  shm_handle;
+#endif
+};
+
+
+GimpPlugInShm *
+gimp_plug_in_shm_new (void)
+{
+  /* allocate a piece of shared memory for use in transporting tiles
+   *  to plug-ins. if we can't allocate a piece of shared memory then
+   *  we'll fall back on sending the data over the pipe.
+   */
+
+  GimpPlugInShm *shm = g_slice_new0 (GimpPlugInShm);
+
+  shm->shm_ID = -1;
+
+#if defined(USE_SYSV_SHM)
+
+  /* Use SysV shared memory mechanisms for transferring tile data. */
+  {
+    shm->shm_ID = shmget (IPC_PRIVATE, TILE_MAP_SIZE, IPC_CREAT | 0600);
+
+    if (shm->shm_ID != -1)
+      {
+        shm->shm_addr = (guchar *) shmat (shm->shm_ID, NULL, 0);
+
+        if (shm->shm_addr == (guchar *) -1)
+          {
+            g_printerr ("shmat() failed: %s\n" ERRMSG_SHM_DISABLE,
+                        g_strerror (errno));
+            shmctl (shm->shm_ID, IPC_RMID, NULL);
+            shm->shm_ID = -1;
+          }
+
+#ifdef IPC_RMID_DEFERRED_RELEASE
+        if (shm->shm_addr != (guchar *) -1)
+          shmctl (shm->shm_ID, IPC_RMID, NULL);
+#endif
+      }
+    else
+      {
+        g_printerr ("shmget() failed: %s\n" ERRMSG_SHM_DISABLE,
+                    g_strerror (errno));
+      }
+  }
+
+#elif defined(USE_WIN32_SHM)
+
+  /* Use Win32 shared memory mechanisms for transferring tile data. */
+  {
+    gint  pid;
+    gchar fileMapName[MAX_PATH];
+
+    /* Our shared memory id will be our process ID */
+    pid = GetCurrentProcessId ();
+
+    /* From the id, derive the file map name */
+    g_snprintf (fileMapName, sizeof (fileMapName), "GIMP%d.SHM", pid);
+
+    /* Create the file mapping into paging space */
+    shm->shm_handle = CreateFileMapping (INVALID_HANDLE_VALUE, NULL,
+                                         PAGE_READWRITE, 0,
+                                         TILE_MAP_SIZE,
+                                         fileMapName);
+
+    if (shm->shm_handle)
+      {
+        /* Map the shared memory into our address space for use */
+        shm->shm_addr = (guchar *) MapViewOfFile (shm->shm_handle,
+                                                  FILE_MAP_ALL_ACCESS,
+                                                  0, 0, TILE_MAP_SIZE);
+
+        /* Verify that we mapped our view */
+        if (shm->shm_addr)
+          {
+            shm->shm_ID = pid;
+          }
+        else
+          {
+            g_printerr ("MapViewOfFile error: %u... " ERRMSG_SHM_DISABLE,
+                        (unsigned) GetLastError ());
+          }
+      }
+    else
+      {
+        g_printerr ("CreateFileMapping error: %u... " ERRMSG_SHM_DISABLE,
+                    (unsigned) GetLastError ());
+      }
+  }
+
+#elif defined(USE_POSIX_SHM)
+
+  /* Use POSIX shared memory mechanisms for transferring tile data. */
+  {
+    gint  pid;
+    gchar shm_handle[32];
+    gint  shm_fd;
+
+    /* Our shared memory id will be our process ID */
+    pid = gimp_get_pid ();
+
+    /* From the id, derive the file map name */
+    g_snprintf (shm_handle, sizeof (shm_handle), "/gimp-shm-%d", pid);
+
+    /* Create the file mapping into paging space */
+    shm_fd = shm_open (shm_handle, O_RDWR | O_CREAT, 0600);
+
+    if (shm_fd != -1)
+      {
+        if (ftruncate (shm_fd, TILE_MAP_SIZE) != -1)
+          {
+            /* Map the shared memory into our address space for use */
+            shm->shm_addr = (guchar *) mmap (NULL, TILE_MAP_SIZE,
+                                             PROT_READ | PROT_WRITE, MAP_SHARED,
+                                             shm_fd, 0);
+
+            /* Verify that we mapped our view */
+            if (shm->shm_addr != MAP_FAILED)
+              {
+                shm->shm_ID = pid;
+              }
+            else
+              {
+                g_printerr ("mmap() failed: %s\n" ERRMSG_SHM_DISABLE,
+                            g_strerror (errno));
+
+                shm_unlink (shm_handle);
+              }
+          }
+        else
+          {
+            g_printerr ("ftruncate() failed: %s\n" ERRMSG_SHM_DISABLE,
+                        g_strerror (errno));
+
+            shm_unlink (shm_handle);
+          }
+
+        close (shm_fd);
+      }
+    else
+      {
+        g_printerr ("shm_open() failed: %s\n" ERRMSG_SHM_DISABLE,
+                    g_strerror (errno));
+      }
+  }
+
+#endif
+
+  if (shm->shm_ID == -1)
+    {
+      g_slice_free (GimpPlugInShm, shm);
+      shm = NULL;
+    }
+  else
+    {
+      GIMP_LOG (SHM, "attached shared memory segment ID = %d", shm->shm_ID);
+    }
+
+  return shm;
+}
+
+void
+gimp_plug_in_shm_free (GimpPlugInShm *shm)
+{
+  g_return_if_fail (shm != NULL);
+
+  if (shm->shm_ID != -1)
+    {
+
+#if defined (USE_SYSV_SHM)
+
+      shmdt (shm->shm_addr);
+
+#ifndef IPC_RMID_DEFERRED_RELEASE
+      shmctl (shm->shm_ID, IPC_RMID, NULL);
+#endif
+
+#elif defined(USE_WIN32_SHM)
+
+      if (shm->shm_handle)
+        CloseHandle (shm->shm_handle);
+
+#elif defined(USE_POSIX_SHM)
+
+      gchar shm_handle[32];
+
+      munmap (shm->shm_addr, TILE_MAP_SIZE);
+
+      g_snprintf (shm_handle, sizeof (shm_handle), "/gimp-shm-%d",
+                  shm->shm_ID);
+
+      shm_unlink (shm_handle);
+
+#endif
+
+      GIMP_LOG (SHM, "detached shared memory segment ID = %d", shm->shm_ID);
+    }
+
+  g_slice_free (GimpPlugInShm, shm);
+}
+
+gint
+gimp_plug_in_shm_get_ID (GimpPlugInShm *shm)
+{
+  g_return_val_if_fail (shm != NULL, -1);
+
+  return shm->shm_ID;
+}
+
+guchar *
+gimp_plug_in_shm_get_addr (GimpPlugInShm *shm)
+{
+  g_return_val_if_fail (shm != NULL, NULL);
+
+  return shm->shm_addr;
+}
diff --git a/app/plug-in/gimppluginshm.h b/app/plug-in/gimppluginshm.h
new file mode 100644
index 0000000..ee89918
--- /dev/null
+++ b/app/plug-in/gimppluginshm.h
@@ -0,0 +1,31 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppluginshm.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_PLUG_IN_SHM_H__
+#define __GIMP_PLUG_IN_SHM_H__
+
+
+GimpPlugInShm * gimp_plug_in_shm_new      (void);
+void            gimp_plug_in_shm_free     (GimpPlugInShm *shm);
+
+gint            gimp_plug_in_shm_get_ID   (GimpPlugInShm *shm);
+guchar        * gimp_plug_in_shm_get_addr (GimpPlugInShm *shm);
+
+
+#endif /* __GIMP_PLUG_IN_SHM_H__ */
diff --git a/app/plug-in/gimptemporaryprocedure.c b/app/plug-in/gimptemporaryprocedure.c
new file mode 100644
index 0000000..5b03d05
--- /dev/null
+++ b/app/plug-in/gimptemporaryprocedure.c
@@ -0,0 +1,156 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimptemporaryprocedure.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "plug-in-types.h"
+
+#include "core/gimp.h"
+
+#include "gimpplugin.h"
+#define __YES_I_NEED_GIMP_PLUG_IN_MANAGER_CALL__
+#include "gimppluginmanager-call.h"
+#include "gimptemporaryprocedure.h"
+
+#include "gimp-intl.h"
+
+
+static void             gimp_temporary_procedure_finalize (GObject        *object);
+
+static GimpValueArray * gimp_temporary_procedure_execute  (GimpProcedure  *procedure,
+                                                           Gimp           *gimp,
+                                                           GimpContext    *context,
+                                                           GimpProgress   *progress,
+                                                           GimpValueArray *args,
+                                                           GError        **error);
+static void        gimp_temporary_procedure_execute_async (GimpProcedure  *procedure,
+                                                           Gimp           *gimp,
+                                                           GimpContext    *context,
+                                                           GimpProgress   *progress,
+                                                           GimpValueArray *args,
+                                                           GimpObject     *display);
+
+static GFile     * gimp_temporary_procedure_get_file      (GimpPlugInProcedure *procedure);
+
+
+G_DEFINE_TYPE (GimpTemporaryProcedure, gimp_temporary_procedure,
+               GIMP_TYPE_PLUG_IN_PROCEDURE)
+
+#define parent_class gimp_temporary_procedure_parent_class
+
+
+static void
+gimp_temporary_procedure_class_init (GimpTemporaryProcedureClass *klass)
+{
+  GObjectClass             *object_class = G_OBJECT_CLASS (klass);
+  GimpProcedureClass       *proc_class   = GIMP_PROCEDURE_CLASS (klass);
+  GimpPlugInProcedureClass *plug_class   = GIMP_PLUG_IN_PROCEDURE_CLASS (klass);
+
+  object_class->finalize    = gimp_temporary_procedure_finalize;
+
+  proc_class->execute       = gimp_temporary_procedure_execute;
+  proc_class->execute_async = gimp_temporary_procedure_execute_async;
+
+  plug_class->get_file      = gimp_temporary_procedure_get_file;
+}
+
+static void
+gimp_temporary_procedure_init (GimpTemporaryProcedure *proc)
+{
+  GIMP_PROCEDURE (proc)->proc_type = GIMP_TEMPORARY;
+}
+
+static void
+gimp_temporary_procedure_finalize (GObject *object)
+{
+  /* GimpTemporaryProcedure *proc = GIMP_TEMPORARY_PROCEDURE (object); */
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static GimpValueArray *
+gimp_temporary_procedure_execute (GimpProcedure   *procedure,
+                                  Gimp            *gimp,
+                                  GimpContext     *context,
+                                  GimpProgress    *progress,
+                                  GimpValueArray  *args,
+                                  GError         **error)
+{
+  return gimp_plug_in_manager_call_run_temp (gimp->plug_in_manager,
+                                             context, progress,
+                                             GIMP_TEMPORARY_PROCEDURE (procedure),
+                                             args);
+}
+
+static void
+gimp_temporary_procedure_execute_async (GimpProcedure  *procedure,
+                                        Gimp           *gimp,
+                                        GimpContext    *context,
+                                        GimpProgress   *progress,
+                                        GimpValueArray *args,
+                                        GimpObject     *display)
+{
+  GimpTemporaryProcedure *temp_procedure = GIMP_TEMPORARY_PROCEDURE (procedure);
+  GimpValueArray         *return_vals;
+
+  return_vals = gimp_plug_in_manager_call_run_temp (gimp->plug_in_manager,
+                                                    context, progress,
+                                                    temp_procedure,
+                                                    args);
+
+  if (return_vals)
+    {
+      GimpPlugInProcedure *proc = GIMP_PLUG_IN_PROCEDURE (procedure);
+
+      gimp_plug_in_procedure_handle_return_values (proc,
+                                                   gimp, progress,
+                                                   return_vals);
+      gimp_value_array_unref (return_vals);
+    }
+}
+
+static GFile *
+gimp_temporary_procedure_get_file (GimpPlugInProcedure *procedure)
+{
+  return GIMP_TEMPORARY_PROCEDURE (procedure)->plug_in->file;
+}
+
+
+/*  public functions  */
+
+GimpProcedure *
+gimp_temporary_procedure_new (GimpPlugIn *plug_in)
+{
+  GimpTemporaryProcedure *proc;
+
+  g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), NULL);
+
+  proc = g_object_new (GIMP_TYPE_TEMPORARY_PROCEDURE, NULL);
+
+  proc->plug_in = plug_in;
+
+  GIMP_PLUG_IN_PROCEDURE (proc)->file = g_file_new_for_path ("none");
+
+  return GIMP_PROCEDURE (proc);
+}
diff --git a/app/plug-in/gimptemporaryprocedure.h b/app/plug-in/gimptemporaryprocedure.h
new file mode 100644
index 0000000..3df53c8
--- /dev/null
+++ b/app/plug-in/gimptemporaryprocedure.h
@@ -0,0 +1,55 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimptemporaryprocedure.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_TEMPORARY_PROCEDURE_H__
+#define __GIMP_TEMPORARY_PROCEDURE_H__
+
+
+#include "gimppluginprocedure.h"
+
+
+#define GIMP_TYPE_TEMPORARY_PROCEDURE            (gimp_temporary_procedure_get_type ())
+#define GIMP_TEMPORARY_PROCEDURE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_TEMPORARY_PROCEDURE, GimpTemporaryProcedure))
+#define GIMP_TEMPORARY_PROCEDURE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_TEMPORARY_PROCEDURE, GimpTemporaryProcedureClass))
+#define GIMP_IS_TEMPORARY_PROCEDURE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_TEMPORARY_PROCEDURE))
+#define GIMP_IS_TEMPORARY_PROCEDURE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_TEMPORARY_PROCEDURE))
+#define GIMP_TEMPORARY_PROCEDURE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_TEMPORARY_PROCEDURE, GimpTemporaryProcedureClass))
+
+
+typedef struct _GimpTemporaryProcedureClass GimpTemporaryProcedureClass;
+
+struct _GimpTemporaryProcedure
+{
+  GimpPlugInProcedure  parent_instance;
+
+  GimpPlugIn          *plug_in;
+};
+
+struct _GimpTemporaryProcedureClass
+{
+  GimpPlugInProcedureClass parent_class;
+};
+
+
+GType           gimp_temporary_procedure_get_type (void) G_GNUC_CONST;
+
+GimpProcedure * gimp_temporary_procedure_new      (GimpPlugIn *plug_in);
+
+
+#endif /* __GIMP_TEMPORARY_PROCEDURE_H__ */
diff --git a/app/plug-in/plug-in-enums.c b/app/plug-in/plug-in-enums.c
new file mode 100644
index 0000000..4f062bb
--- /dev/null
+++ b/app/plug-in/plug-in-enums.c
@@ -0,0 +1,118 @@
+
+/* Generated data (by gimp-mkenums) */
+
+#include "config.h"
+#include <gio/gio.h>
+#include "libgimpbase/gimpbase.h"
+#include "plug-in-enums.h"
+#include "gimp-intl.h"
+
+/* enumerations from "plug-in-enums.h" */
+GType
+gimp_plug_in_image_type_get_type (void)
+{
+  static const GFlagsValue values[] =
+  {
+    { GIMP_PLUG_IN_RGB_IMAGE, "GIMP_PLUG_IN_RGB_IMAGE", "rgb-image" },
+    { GIMP_PLUG_IN_GRAY_IMAGE, "GIMP_PLUG_IN_GRAY_IMAGE", "gray-image" },
+    { GIMP_PLUG_IN_INDEXED_IMAGE, "GIMP_PLUG_IN_INDEXED_IMAGE", "indexed-image" },
+    { GIMP_PLUG_IN_RGBA_IMAGE, "GIMP_PLUG_IN_RGBA_IMAGE", "rgba-image" },
+    { GIMP_PLUG_IN_GRAYA_IMAGE, "GIMP_PLUG_IN_GRAYA_IMAGE", "graya-image" },
+    { GIMP_PLUG_IN_INDEXEDA_IMAGE, "GIMP_PLUG_IN_INDEXEDA_IMAGE", "indexeda-image" },
+    { 0, NULL, NULL }
+  };
+
+  static const GimpFlagsDesc descs[] =
+  {
+    { GIMP_PLUG_IN_RGB_IMAGE, "GIMP_PLUG_IN_RGB_IMAGE", NULL },
+    { GIMP_PLUG_IN_GRAY_IMAGE, "GIMP_PLUG_IN_GRAY_IMAGE", NULL },
+    { GIMP_PLUG_IN_INDEXED_IMAGE, "GIMP_PLUG_IN_INDEXED_IMAGE", NULL },
+    { GIMP_PLUG_IN_RGBA_IMAGE, "GIMP_PLUG_IN_RGBA_IMAGE", NULL },
+    { GIMP_PLUG_IN_GRAYA_IMAGE, "GIMP_PLUG_IN_GRAYA_IMAGE", NULL },
+    { GIMP_PLUG_IN_INDEXEDA_IMAGE, "GIMP_PLUG_IN_INDEXEDA_IMAGE", NULL },
+    { 0, NULL, NULL }
+  };
+
+  static GType type = 0;
+
+  if (G_UNLIKELY (! type))
+    {
+      type = g_flags_register_static ("GimpPlugInImageType", values);
+      gimp_type_set_translation_context (type, "plug-in-image-type");
+      gimp_flags_set_value_descriptions (type, descs);
+    }
+
+  return type;
+}
+
+GType
+gimp_plug_in_call_mode_get_type (void)
+{
+  static const GEnumValue values[] =
+  {
+    { GIMP_PLUG_IN_CALL_NONE, "GIMP_PLUG_IN_CALL_NONE", "none" },
+    { GIMP_PLUG_IN_CALL_RUN, "GIMP_PLUG_IN_CALL_RUN", "run" },
+    { GIMP_PLUG_IN_CALL_QUERY, "GIMP_PLUG_IN_CALL_QUERY", "query" },
+    { GIMP_PLUG_IN_CALL_INIT, "GIMP_PLUG_IN_CALL_INIT", "init" },
+    { 0, NULL, NULL }
+  };
+
+  static const GimpEnumDesc descs[] =
+  {
+    { GIMP_PLUG_IN_CALL_NONE, "GIMP_PLUG_IN_CALL_NONE", NULL },
+    { GIMP_PLUG_IN_CALL_RUN, "GIMP_PLUG_IN_CALL_RUN", NULL },
+    { GIMP_PLUG_IN_CALL_QUERY, "GIMP_PLUG_IN_CALL_QUERY", NULL },
+    { GIMP_PLUG_IN_CALL_INIT, "GIMP_PLUG_IN_CALL_INIT", NULL },
+    { 0, NULL, NULL }
+  };
+
+  static GType type = 0;
+
+  if (G_UNLIKELY (! type))
+    {
+      type = g_enum_register_static ("GimpPlugInCallMode", values);
+      gimp_type_set_translation_context (type, "plug-in-call-mode");
+      gimp_enum_set_value_descriptions (type, descs);
+    }
+
+  return type;
+}
+
+GType
+gimp_file_procedure_group_get_type (void)
+{
+  static const GEnumValue values[] =
+  {
+    { GIMP_FILE_PROCEDURE_GROUP_NONE, "GIMP_FILE_PROCEDURE_GROUP_NONE", "none" },
+    { GIMP_FILE_PROCEDURE_GROUP_ANY, "GIMP_FILE_PROCEDURE_GROUP_ANY", "any" },
+    { GIMP_FILE_PROCEDURE_GROUP_OPEN, "GIMP_FILE_PROCEDURE_GROUP_OPEN", "open" },
+    { GIMP_FILE_PROCEDURE_GROUP_SAVE, "GIMP_FILE_PROCEDURE_GROUP_SAVE", "save" },
+    { GIMP_FILE_PROCEDURE_GROUP_EXPORT, "GIMP_FILE_PROCEDURE_GROUP_EXPORT", "export" },
+    { 0, NULL, NULL }
+  };
+
+  static const GimpEnumDesc descs[] =
+  {
+    { GIMP_FILE_PROCEDURE_GROUP_NONE, "GIMP_FILE_PROCEDURE_GROUP_NONE", NULL },
+    { GIMP_FILE_PROCEDURE_GROUP_ANY, "GIMP_FILE_PROCEDURE_GROUP_ANY", NULL },
+    { GIMP_FILE_PROCEDURE_GROUP_OPEN, "GIMP_FILE_PROCEDURE_GROUP_OPEN", NULL },
+    { GIMP_FILE_PROCEDURE_GROUP_SAVE, "GIMP_FILE_PROCEDURE_GROUP_SAVE", NULL },
+    { GIMP_FILE_PROCEDURE_GROUP_EXPORT, "GIMP_FILE_PROCEDURE_GROUP_EXPORT", NULL },
+    { 0, NULL, NULL }
+  };
+
+  static GType type = 0;
+
+  if (G_UNLIKELY (! type))
+    {
+      type = g_enum_register_static ("GimpFileProcedureGroup", values);
+      gimp_type_set_translation_context (type, "file-procedure-group");
+      gimp_enum_set_value_descriptions (type, descs);
+    }
+
+  return type;
+}
+
+
+/* Generated data ends here */
+
diff --git a/app/plug-in/plug-in-enums.h b/app/plug-in/plug-in-enums.h
new file mode 100644
index 0000000..c5b6775
--- /dev/null
+++ b/app/plug-in/plug-in-enums.h
@@ -0,0 +1,64 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __PLUG_IN_ENUMS_H__
+#define __PLUG_IN_ENUMS_H__
+
+
+#define GIMP_TYPE_PLUG_IN_IMAGE_TYPE (gimp_plug_in_image_type_get_type ())
+
+GType gimp_plug_in_image_type_get_type (void) G_GNUC_CONST;
+
+typedef enum
+{
+  GIMP_PLUG_IN_RGB_IMAGE      = 1 << 0,
+  GIMP_PLUG_IN_GRAY_IMAGE     = 1 << 1,
+  GIMP_PLUG_IN_INDEXED_IMAGE  = 1 << 2,
+  GIMP_PLUG_IN_RGBA_IMAGE     = 1 << 3,
+  GIMP_PLUG_IN_GRAYA_IMAGE    = 1 << 4,
+  GIMP_PLUG_IN_INDEXEDA_IMAGE = 1 << 5
+} GimpPlugInImageType;
+
+
+#define GIMP_TYPE_PLUG_CALL_MODE (gimp_plug_in_call_mode_get_type ())
+
+GType gimp_plug_in_call_mode_get_type (void) G_GNUC_CONST;
+
+typedef enum
+{
+  GIMP_PLUG_IN_CALL_NONE,
+  GIMP_PLUG_IN_CALL_RUN,
+  GIMP_PLUG_IN_CALL_QUERY,
+  GIMP_PLUG_IN_CALL_INIT
+} GimpPlugInCallMode;
+
+
+#define GIMP_TYPE_FILE_PROCEDURE_GROUP (gimp_file_procedure_group_get_type ())
+
+GType gimp_file_procedure_group_get_type (void) G_GNUC_CONST;
+
+typedef enum
+{
+  GIMP_FILE_PROCEDURE_GROUP_NONE,
+  GIMP_FILE_PROCEDURE_GROUP_ANY,
+  GIMP_FILE_PROCEDURE_GROUP_OPEN,
+  GIMP_FILE_PROCEDURE_GROUP_SAVE,
+  GIMP_FILE_PROCEDURE_GROUP_EXPORT
+} GimpFileProcedureGroup;
+
+
+#endif /* __PLUG_IN_ENUMS_H__ */
diff --git a/app/plug-in/plug-in-menu-path.c b/app/plug-in/plug-in-menu-path.c
new file mode 100644
index 0000000..fa6fa16
--- /dev/null
+++ b/app/plug-in/plug-in-menu-path.c
@@ -0,0 +1,141 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * plug-in-menu-path.c
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gio/gio.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "plug-in-types.h"
+
+#include "plug-in-menu-path.h"
+
+
+typedef struct _MenuPathMapping MenuPathMapping;
+
+struct _MenuPathMapping
+{
+  const gchar *orig_path;
+  const gchar *label;
+  const gchar *mapped_path;
+};
+
+
+static const MenuPathMapping menu_path_mappings[] =
+{
+  { "<Toolbox>/Xtns/Languages",       NULL, "<Image>/Filters/Languages"           },
+  { "<Toolbox>/Xtns/Extensions",      NULL, "<Image>/Filters/Extensions"          },
+
+  { "<Toolbox>/Xtns/Buttons",         NULL, "<Image>/File/Create/Buttons"         },
+  { "<Toolbox>/Xtns/Logos",           NULL, "<Image>/File/Create/Logos"           },
+  { "<Toolbox>/Xtns/Misc",            NULL, "<Image>/File/Create/Misc"            },
+  { "<Toolbox>/Xtns/Patterns",        NULL, "<Image>/File/Create/Patterns"        },
+  { "<Toolbox>/Xtns/Web Page Themes", NULL, "<Image>/File/Create/Web Page Themes" },
+
+  { "<Toolbox>/Xtns", "Buttons",            "<Image>/File/Create"                 },
+  { "<Toolbox>/Xtns", "Logos",              "<Image>/File/Create"                 },
+  { "<Toolbox>/Xtns", "Misc",               "<Image>/File/Create"                 },
+  { "<Toolbox>/Xtns", "Patterns",           "<Image>/File/Create"                 },
+  { "<Toolbox>/Xtns", "Web Page Themes",    "<Image>/File/Create"                 },
+
+  { "<Toolbox>/Xtns",                 NULL, "<Image>/Filters/Extensions"          },
+  { "<Toolbox>/Help",                 NULL, "<Image>/Help"                        },
+
+  { "<Toolbox>/File/Acquire",           NULL, "<Image>/File/Create/Acquire"       },
+  { "<Toolbox>",                        NULL, "<Image>"                           },
+  { "<Image>/File/Acquire",             NULL, "<Image>/File/Create/Acquire"       },
+  { "<Image>/File/New",                 NULL, "<Image>/File/Create"               },
+  { "<Image>/Image/Mode/Color Profile", NULL, "<Image>/Image/Color Management"    },
+  { NULL, NULL, NULL }
+};
+
+
+gchar *
+plug_in_menu_path_map (const gchar *menu_path,
+                       const gchar *menu_label)
+{
+  const MenuPathMapping *mapping;
+  gchar                 *stripped_label = NULL;
+
+  g_return_val_if_fail (menu_path != NULL, NULL);
+
+  if (menu_label)
+    stripped_label = gimp_strip_uline (menu_label);
+
+  for (mapping = menu_path_mappings; mapping->orig_path; mapping++)
+    {
+      if (g_str_has_prefix (menu_path, mapping->orig_path))
+        {
+          gint   orig_len = strlen (mapping->orig_path);
+          gchar *mapped_path;
+
+          /*  if the mapping has a label, only map if the passed label
+           *  is identical and the paths' lengths match exactly.
+           */
+          if (mapping->label &&
+              (! stripped_label               ||
+               strlen (menu_path) != orig_len ||
+               strcmp (mapping->label, stripped_label)))
+            {
+              continue;
+            }
+
+          if (strlen (menu_path) > orig_len)
+            mapped_path = g_strconcat (mapping->mapped_path,
+                                       menu_path + orig_len,
+                                       NULL);
+          else
+            mapped_path = g_strdup (mapping->mapped_path);
+
+#if GIMP_UNSTABLE
+          {
+            gchar *orig;
+            gchar *mapped;
+
+            if (menu_label)
+              {
+                orig   = g_strdup_printf ("%s/%s", menu_path,   stripped_label);
+                mapped = g_strdup_printf ("%s/%s", mapped_path, stripped_label);
+              }
+            else
+              {
+                orig   = g_strdup (menu_path);
+                mapped = g_strdup (mapped_path);
+              }
+
+            g_printerr (" mapped '%s' to '%s'\n", orig, mapped);
+
+            g_free (orig);
+            g_free (mapped);
+          }
+#endif
+
+          g_free (stripped_label);
+
+          return mapped_path;
+        }
+    }
+
+  g_free (stripped_label);
+
+  return g_strdup (menu_path);
+}
diff --git a/app/plug-in/plug-in-menu-path.h b/app/plug-in/plug-in-menu-path.h
new file mode 100644
index 0000000..b222c06
--- /dev/null
+++ b/app/plug-in/plug-in-menu-path.h
@@ -0,0 +1,28 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * plug-in-menu-path.h
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __PLUG_IN_MENU_PATH_H__
+#define __PLUG_IN_MENU_PATH_H__
+
+
+gchar * plug_in_menu_path_map (const gchar *menu_path,
+                               const gchar *menu_label);
+
+
+#endif /* __PLUG_IN_MENU_PATH_H__ */
diff --git a/app/plug-in/plug-in-params.c b/app/plug-in/plug-in-params.c
new file mode 100644
index 0000000..3f781b2
--- /dev/null
+++ b/app/plug-in/plug-in-params.c
@@ -0,0 +1,442 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <cairo.h>
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpbase/gimpprotocol.h"
+#include "libgimpcolor/gimpcolor.h"
+
+#include "plug-in-types.h"
+
+#include "core/gimpparamspecs.h"
+
+#include "pdb/gimp-pdb-compat.h"
+
+#include "plug-in-params.h"
+
+
+GimpValueArray *
+plug_in_params_to_args (GParamSpec **pspecs,
+                        gint         n_pspecs,
+                        GPParam     *params,
+                        gint         n_params,
+                        gboolean     return_values,
+                        gboolean     full_copy)
+{
+  GimpValueArray *args;
+  gint            i;
+
+  g_return_val_if_fail ((pspecs != NULL && n_pspecs  > 0) ||
+                        (pspecs == NULL && n_pspecs == 0), NULL);
+  g_return_val_if_fail ((params != NULL && n_params  > 0) ||
+                        (params == NULL && n_params == 0), NULL);
+
+  args = gimp_value_array_new (n_params);
+
+  for (i = 0; i < n_params; i++)
+    {
+      GValue value = G_VALUE_INIT;
+      GType  type;
+      gint   count;
+
+      /*  first get the fallback compat GType that matches the pdb type  */
+      type = gimp_pdb_compat_arg_type_to_gtype (params[i].type);
+
+      /*  then try to try to be more specific by looking at the param
+       *  spec (return values have one additional value (the status),
+       *  skip that, it's not in the array of param specs)
+       */
+      if (i > 0 || ! return_values)
+        {
+          gint pspec_index = i;
+
+          if (return_values)
+            pspec_index--;
+
+          /*  are there param specs left?  */
+          if (pspec_index < n_pspecs)
+            {
+              GType          pspec_gtype;
+              GimpPDBArgType pspec_arg_type;
+
+              pspec_gtype    = G_PARAM_SPEC_VALUE_TYPE (pspecs[pspec_index]);
+              pspec_arg_type = gimp_pdb_compat_arg_type_from_gtype (pspec_gtype);
+
+              /*  if the param spec's GType, mapped to a pdb type, matches
+               *  the passed pdb type, use the param spec's GType
+               */
+              if (pspec_arg_type == params[i].type)
+                type = pspec_gtype;
+            }
+        }
+
+      g_value_init (&value, type);
+
+      switch (gimp_pdb_compat_arg_type_from_gtype (type))
+        {
+        case GIMP_PDB_INT32:
+          if (G_VALUE_HOLDS_INT (&value))
+            g_value_set_int (&value, params[i].data.d_int32);
+          else if (G_VALUE_HOLDS_UINT (&value))
+            g_value_set_uint (&value, params[i].data.d_int32);
+          else if (G_VALUE_HOLDS_ENUM (&value))
+            g_value_set_enum (&value, params[i].data.d_int32);
+          else if (G_VALUE_HOLDS_BOOLEAN (&value))
+            g_value_set_boolean (&value, params[i].data.d_int32 ? TRUE : FALSE);
+          else
+            {
+              g_printerr ("%s: unhandled GIMP_PDB_INT32 type: %s\n",
+                          G_STRFUNC, g_type_name (G_VALUE_TYPE (&value)));
+              g_return_val_if_reached (args);
+            }
+          break;
+
+        case GIMP_PDB_INT16:
+          g_value_set_int (&value, params[i].data.d_int16);
+          break;
+
+        case GIMP_PDB_INT8:
+          g_value_set_uint (&value, params[i].data.d_int8);
+          break;
+
+        case GIMP_PDB_FLOAT:
+          g_value_set_double (&value, params[i].data.d_float);
+          break;
+
+        case GIMP_PDB_STRING:
+          if (full_copy)
+            g_value_set_string (&value, params[i].data.d_string);
+          else
+            g_value_set_static_string (&value, params[i].data.d_string);
+          break;
+
+        case GIMP_PDB_INT32ARRAY:
+          count = g_value_get_int (gimp_value_array_index (args, i - 1));
+          if (full_copy)
+            gimp_value_set_int32array (&value,
+                                       params[i].data.d_int32array,
+                                       count);
+          else
+            gimp_value_set_static_int32array (&value,
+                                              params[i].data.d_int32array,
+                                              count);
+          break;
+
+        case GIMP_PDB_INT16ARRAY:
+          count = g_value_get_int (gimp_value_array_index (args, i - 1));
+          if (full_copy)
+            gimp_value_set_int16array (&value,
+                                       params[i].data.d_int16array,
+                                       count);
+          else
+            gimp_value_set_static_int16array (&value,
+                                              params[i].data.d_int16array,
+                                              count);
+          break;
+
+        case GIMP_PDB_INT8ARRAY:
+          count = g_value_get_int (gimp_value_array_index (args, i - 1));
+          if (full_copy)
+            gimp_value_set_int8array (&value,
+                                      params[i].data.d_int8array,
+                                      count);
+          else
+            gimp_value_set_static_int8array (&value,
+                                             params[i].data.d_int8array,
+                                             count);
+          break;
+
+        case GIMP_PDB_FLOATARRAY:
+          count = g_value_get_int (gimp_value_array_index (args, i - 1));
+          if (full_copy)
+            gimp_value_set_floatarray (&value,
+                                       params[i].data.d_floatarray,
+                                       count);
+          else
+            gimp_value_set_static_floatarray (&value,
+                                              params[i].data.d_floatarray,
+                                              count);
+          break;
+
+        case GIMP_PDB_STRINGARRAY:
+          count = g_value_get_int (gimp_value_array_index (args, i - 1));
+          if (full_copy)
+            gimp_value_set_stringarray (&value,
+                                        (const gchar **) params[i].data.d_stringarray,
+                                        count);
+          else
+            gimp_value_set_static_stringarray (&value,
+                                               (const gchar **) params[i].data.d_stringarray,
+                                               count);
+          break;
+
+        case GIMP_PDB_COLOR:
+          gimp_value_set_rgb (&value, &params[i].data.d_color);
+          break;
+
+        case GIMP_PDB_ITEM:
+          g_value_set_int (&value, params[i].data.d_item);
+          break;
+
+        case GIMP_PDB_DISPLAY:
+          g_value_set_int (&value, params[i].data.d_display);
+          break;
+
+        case GIMP_PDB_IMAGE:
+          g_value_set_int (&value, params[i].data.d_image);
+          break;
+
+        case GIMP_PDB_LAYER:
+          g_value_set_int (&value, params[i].data.d_layer);
+          break;
+
+        case GIMP_PDB_CHANNEL:
+          g_value_set_int (&value, params[i].data.d_channel);
+          break;
+
+        case GIMP_PDB_DRAWABLE:
+          g_value_set_int (&value, params[i].data.d_drawable);
+          break;
+
+        case GIMP_PDB_SELECTION:
+          g_value_set_int (&value, params[i].data.d_selection);
+          break;
+
+        case GIMP_PDB_COLORARRAY:
+          count = g_value_get_int (gimp_value_array_index (args, i - 1));
+          if (full_copy)
+            gimp_value_set_colorarray (&value,
+                                      params[i].data.d_colorarray,
+                                      count);
+          else
+            gimp_value_set_static_colorarray (&value,
+                                             params[i].data.d_colorarray,
+                                             count);
+          break;
+
+        case GIMP_PDB_VECTORS:
+          g_value_set_int (&value, params[i].data.d_vectors);
+          break;
+
+        case GIMP_PDB_PARASITE:
+          if (full_copy)
+            g_value_set_boxed (&value, &params[i].data.d_parasite);
+          else
+            g_value_set_static_boxed (&value, &params[i].data.d_parasite);
+          break;
+
+        case GIMP_PDB_STATUS:
+          g_value_set_enum (&value, params[i].data.d_status);
+          break;
+
+        case GIMP_PDB_END:
+          break;
+        }
+
+      gimp_value_array_append (args, &value);
+      g_value_unset (&value);
+    }
+
+  return args;
+}
+
+GPParam *
+plug_in_args_to_params (GimpValueArray *args,
+                        gboolean        full_copy)
+{
+  GPParam *params;
+  gint     length;
+  gint     i;
+
+  g_return_val_if_fail (args != NULL, NULL);
+
+  params = g_new0 (GPParam, gimp_value_array_length (args));
+
+  length = gimp_value_array_length (args);
+
+  for (i = 0; i < length; i++)
+    {
+      GValue *value = gimp_value_array_index (args, i);
+
+      params[i].type =
+        gimp_pdb_compat_arg_type_from_gtype (G_VALUE_TYPE (value));
+
+      switch (params[i].type)
+        {
+        case GIMP_PDB_INT32:
+          if (G_VALUE_HOLDS_INT (value))
+            params[i].data.d_int32 = g_value_get_int (value);
+          else if (G_VALUE_HOLDS_UINT (value))
+            params[i].data.d_int32 = g_value_get_uint (value);
+          else if (G_VALUE_HOLDS_ENUM (value))
+            params[i].data.d_int32 = g_value_get_enum (value);
+          else if (G_VALUE_HOLDS_BOOLEAN (value))
+            params[i].data.d_int32 = g_value_get_boolean (value);
+          else
+            {
+              g_printerr ("%s: unhandled GIMP_PDB_INT32 type: %s\n",
+                          G_STRFUNC, g_type_name (G_VALUE_TYPE (value)));
+              g_return_val_if_reached (params);
+            }
+          break;
+
+        case GIMP_PDB_INT16:
+          params[i].data.d_int16 = g_value_get_int (value);
+          break;
+
+        case GIMP_PDB_INT8:
+          params[i].data.d_int8 = g_value_get_uint (value);
+          break;
+
+        case GIMP_PDB_FLOAT:
+          params[i].data.d_float = g_value_get_double (value);
+          break;
+
+        case GIMP_PDB_STRING:
+          if (full_copy)
+            params[i].data.d_string = g_value_dup_string (value);
+          else
+            params[i].data.d_string = (gchar *) g_value_get_string (value);
+          break;
+
+        case GIMP_PDB_INT32ARRAY:
+          if (full_copy)
+            params[i].data.d_int32array = gimp_value_dup_int32array (value);
+          else
+            params[i].data.d_int32array = (gint32 *) gimp_value_get_int32array (value);
+          break;
+
+        case GIMP_PDB_INT16ARRAY:
+          if (full_copy)
+            params[i].data.d_int16array = gimp_value_dup_int16array (value);
+          else
+            params[i].data.d_int16array = (gint16 *) gimp_value_get_int16array (value);
+          break;
+
+        case GIMP_PDB_INT8ARRAY:
+          if (full_copy)
+            params[i].data.d_int8array = gimp_value_dup_int8array (value);
+          else
+            params[i].data.d_int8array = (guint8 *) gimp_value_get_int8array (value);
+          break;
+
+        case GIMP_PDB_FLOATARRAY:
+          if (full_copy)
+            params[i].data.d_floatarray = gimp_value_dup_floatarray (value);
+          else
+            params[i].data.d_floatarray = (gdouble *) gimp_value_get_floatarray (value);
+          break;
+
+        case GIMP_PDB_STRINGARRAY:
+          if (full_copy)
+            params[i].data.d_stringarray = gimp_value_dup_stringarray (value);
+          else
+            params[i].data.d_stringarray = (gchar **) gimp_value_get_stringarray (value);
+          break;
+
+        case GIMP_PDB_COLOR:
+          gimp_value_get_rgb (value, &params[i].data.d_color);
+          break;
+
+        case GIMP_PDB_ITEM:
+          params[i].data.d_item = g_value_get_int (value);
+          break;
+
+        case GIMP_PDB_DISPLAY:
+          params[i].data.d_display = g_value_get_int (value);
+          break;
+
+        case GIMP_PDB_IMAGE:
+          params[i].data.d_image = g_value_get_int (value);
+          break;
+
+        case GIMP_PDB_LAYER:
+          params[i].data.d_layer = g_value_get_int (value);
+          break;
+
+        case GIMP_PDB_CHANNEL:
+          params[i].data.d_channel = g_value_get_int (value);
+          break;
+
+        case GIMP_PDB_DRAWABLE:
+          params[i].data.d_drawable = g_value_get_int (value);
+          break;
+
+        case GIMP_PDB_SELECTION:
+          params[i].data.d_selection = g_value_get_int (value);
+          break;
+
+        case GIMP_PDB_COLORARRAY:
+          if (full_copy)
+            params[i].data.d_colorarray = gimp_value_dup_colorarray (value);
+          else
+            params[i].data.d_colorarray = (GimpRGB *) gimp_value_get_colorarray (value);
+          break;
+
+        case GIMP_PDB_VECTORS:
+          params[i].data.d_vectors = g_value_get_int (value);
+          break;
+
+        case GIMP_PDB_PARASITE:
+          {
+            GimpParasite *parasite = (full_copy ?
+                                      g_value_dup_boxed (value) :
+                                      g_value_get_boxed (value));
+
+            if (parasite)
+              {
+                params[i].data.d_parasite.name  = parasite->name;
+                params[i].data.d_parasite.flags = parasite->flags;
+                params[i].data.d_parasite.size  = parasite->size;
+                params[i].data.d_parasite.data  = parasite->data;
+
+                if (full_copy)
+                  {
+                    parasite->name  = NULL;
+                    parasite->flags = 0;
+                    parasite->size  = 0;
+                    parasite->data  = NULL;
+
+                    gimp_parasite_free (parasite);
+                  }
+              }
+            else
+              {
+                params[i].data.d_parasite.name  = NULL;
+                params[i].data.d_parasite.flags = 0;
+                params[i].data.d_parasite.size  = 0;
+                params[i].data.d_parasite.data  = NULL;
+              }
+          }
+          break;
+
+        case GIMP_PDB_STATUS:
+          params[i].data.d_status = g_value_get_enum (value);
+          break;
+
+        case GIMP_PDB_END:
+          break;
+        }
+    }
+
+  return params;
+}
diff --git a/app/plug-in/plug-in-params.h b/app/plug-in/plug-in-params.h
new file mode 100644
index 0000000..0b8df27
--- /dev/null
+++ b/app/plug-in/plug-in-params.h
@@ -0,0 +1,32 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __PLUG_IN_PARAMS_H__
+#define __PLUG_IN_PARAMS_H__
+
+
+GimpValueArray * plug_in_params_to_args (GParamSpec     **pspecs,
+                                         gint             n_pspecs,
+                                         GPParam         *params,
+                                         gint             n_params,
+                                         gboolean         return_values,
+                                         gboolean         full_copy);
+GPParam     * plug_in_args_to_params    (GimpValueArray  *args,
+                                         gboolean         full_copy);
+
+
+#endif /* __PLUG_IN_PARAMS_H__ */
diff --git a/app/plug-in/plug-in-rc.c b/app/plug-in/plug-in-rc.c
new file mode 100644
index 0000000..42cfe3d
--- /dev/null
+++ b/app/plug-in/plug-in-rc.c
@@ -0,0 +1,1137 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * plug-in-rc.c
+ * Copyright (C) 2001  Sven Neumann <sven@gimp.org>
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpbase/gimpprotocol.h"
+#include "libgimpconfig/gimpconfig.h"
+
+#include "plug-in-types.h"
+
+#include "core/gimp.h"
+
+#include "pdb/gimp-pdb-compat.h"
+
+#include "gimpplugindef.h"
+#include "gimppluginprocedure.h"
+#include "plug-in-rc.h"
+
+#include "gimp-intl.h"
+
+
+#define PLUG_IN_RC_FILE_VERSION 5
+
+
+/*
+ *  All deserialize functions return G_TOKEN_LEFT_PAREN on success,
+ *  or the GTokenType they would have expected but didn't get,
+ *  or G_TOKEN_ERROR if the function already set an error itself.
+ */
+
+static GTokenType plug_in_def_deserialize        (Gimp                 *gimp,
+                                                  GScanner             *scanner,
+                                                  GSList              **plug_in_defs);
+static GTokenType plug_in_procedure_deserialize  (GScanner             *scanner,
+                                                  Gimp                 *gimp,
+                                                  GFile                *file,
+                                                  GimpPlugInProcedure **proc);
+static GTokenType plug_in_menu_path_deserialize  (GScanner             *scanner,
+                                                  GimpPlugInProcedure  *proc);
+static GTokenType plug_in_icon_deserialize       (GScanner             *scanner,
+                                                  GimpPlugInProcedure  *proc);
+static GTokenType plug_in_file_proc_deserialize  (GScanner             *scanner,
+                                                  GimpPlugInProcedure  *proc);
+static GTokenType plug_in_proc_arg_deserialize   (GScanner             *scanner,
+                                                  Gimp                 *gimp,
+                                                  GimpProcedure        *procedure,
+                                                  gboolean              return_value);
+static GTokenType plug_in_locale_def_deserialize (GScanner             *scanner,
+                                                  GimpPlugInDef        *plug_in_def);
+static GTokenType plug_in_help_def_deserialize   (GScanner             *scanner,
+                                                  GimpPlugInDef        *plug_in_def);
+static GTokenType plug_in_has_init_deserialize   (GScanner             *scanner,
+                                                  GimpPlugInDef        *plug_in_def);
+
+
+enum
+{
+  PROTOCOL_VERSION = 1,
+  FILE_VERSION,
+  PLUG_IN_DEF,
+  PROC_DEF,
+  LOCALE_DEF,
+  HELP_DEF,
+  HAS_INIT,
+  PROC_ARG,
+  MENU_PATH,
+  ICON,
+  LOAD_PROC,
+  SAVE_PROC,
+  EXTENSIONS,
+  PREFIXES,
+  MAGICS,
+  PRIORITY,
+  MIME_TYPES,
+  HANDLES_URI,
+  HANDLES_RAW,
+  THUMB_LOADER
+};
+
+
+GSList *
+plug_in_rc_parse (Gimp    *gimp,
+                  GFile   *file,
+                  GError **error)
+{
+  GScanner   *scanner;
+  GEnumClass *enum_class;
+  GSList     *plug_in_defs     = NULL;
+  gint        protocol_version = GIMP_PROTOCOL_VERSION;
+  gint        file_version     = PLUG_IN_RC_FILE_VERSION;
+  GTokenType  token;
+
+  g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
+  g_return_val_if_fail (G_IS_FILE (file), NULL);
+  g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+  scanner = gimp_scanner_new_gfile (file, error);
+
+  if (! scanner)
+    return NULL;
+
+  enum_class = g_type_class_ref (GIMP_TYPE_ICON_TYPE);
+
+  g_scanner_scope_add_symbol (scanner, 0,
+                              "protocol-version",
+                              GINT_TO_POINTER (PROTOCOL_VERSION));
+  g_scanner_scope_add_symbol (scanner, 0,
+                              "file-version",
+                              GINT_TO_POINTER (FILE_VERSION));
+  g_scanner_scope_add_symbol (scanner, 0,
+                              "plug-in-def", GINT_TO_POINTER (PLUG_IN_DEF));
+
+  g_scanner_scope_add_symbol (scanner, PLUG_IN_DEF,
+                              "proc-def", GINT_TO_POINTER (PROC_DEF));
+  g_scanner_scope_add_symbol (scanner, PLUG_IN_DEF,
+                              "locale-def", GINT_TO_POINTER (LOCALE_DEF));
+  g_scanner_scope_add_symbol (scanner, PLUG_IN_DEF,
+                              "help-def", GINT_TO_POINTER (HELP_DEF));
+  g_scanner_scope_add_symbol (scanner, PLUG_IN_DEF,
+                              "has-init", GINT_TO_POINTER (HAS_INIT));
+  g_scanner_scope_add_symbol (scanner, PLUG_IN_DEF,
+                              "proc-arg", GINT_TO_POINTER (PROC_ARG));
+  g_scanner_scope_add_symbol (scanner, PLUG_IN_DEF,
+                              "menu-path", GINT_TO_POINTER (MENU_PATH));
+  g_scanner_scope_add_symbol (scanner, PLUG_IN_DEF,
+                              "icon", GINT_TO_POINTER (ICON));
+  g_scanner_scope_add_symbol (scanner, PLUG_IN_DEF,
+                              "load-proc", GINT_TO_POINTER (LOAD_PROC));
+  g_scanner_scope_add_symbol (scanner, PLUG_IN_DEF,
+                              "save-proc", GINT_TO_POINTER (SAVE_PROC));
+
+  g_scanner_scope_add_symbol (scanner, LOAD_PROC,
+                              "extensions", GINT_TO_POINTER (EXTENSIONS));
+  g_scanner_scope_add_symbol (scanner, LOAD_PROC,
+                              "prefixes", GINT_TO_POINTER (PREFIXES));
+  g_scanner_scope_add_symbol (scanner, LOAD_PROC,
+                              "magics", GINT_TO_POINTER (MAGICS));
+  g_scanner_scope_add_symbol (scanner, LOAD_PROC,
+                              "priority", GINT_TO_POINTER (PRIORITY));
+  g_scanner_scope_add_symbol (scanner, LOAD_PROC,
+                              "mime-types", GINT_TO_POINTER (MIME_TYPES));
+  g_scanner_scope_add_symbol (scanner, LOAD_PROC,
+                              "handles-uri", GINT_TO_POINTER (HANDLES_URI));
+  g_scanner_scope_add_symbol (scanner, LOAD_PROC,
+                              "handles-raw", GINT_TO_POINTER (HANDLES_RAW));
+  g_scanner_scope_add_symbol (scanner, LOAD_PROC,
+                              "thumb-loader", GINT_TO_POINTER (THUMB_LOADER));
+
+  g_scanner_scope_add_symbol (scanner, SAVE_PROC,
+                              "extensions", GINT_TO_POINTER (EXTENSIONS));
+  g_scanner_scope_add_symbol (scanner, SAVE_PROC,
+                              "prefixes", GINT_TO_POINTER (PREFIXES));
+  g_scanner_scope_add_symbol (scanner, SAVE_PROC,
+                              "priority", GINT_TO_POINTER (PRIORITY));
+  g_scanner_scope_add_symbol (scanner, SAVE_PROC,
+                              "mime-types", GINT_TO_POINTER (MIME_TYPES));
+  g_scanner_scope_add_symbol (scanner, SAVE_PROC,
+                              "handles-uri", GINT_TO_POINTER (HANDLES_URI));
+
+  token = G_TOKEN_LEFT_PAREN;
+
+  while (protocol_version == GIMP_PROTOCOL_VERSION   &&
+         file_version     == PLUG_IN_RC_FILE_VERSION &&
+         g_scanner_peek_next_token (scanner) == token)
+    {
+      token = g_scanner_get_next_token (scanner);
+
+      switch (token)
+        {
+        case G_TOKEN_LEFT_PAREN:
+          token = G_TOKEN_SYMBOL;
+          break;
+
+        case G_TOKEN_SYMBOL:
+          switch (GPOINTER_TO_INT (scanner->value.v_symbol))
+            {
+            case PROTOCOL_VERSION:
+              token = G_TOKEN_INT;
+              if (gimp_scanner_parse_int (scanner, &protocol_version))
+                token = G_TOKEN_RIGHT_PAREN;
+              break;
+
+            case FILE_VERSION:
+              token = G_TOKEN_INT;
+              if (gimp_scanner_parse_int (scanner, &file_version))
+                token = G_TOKEN_RIGHT_PAREN;
+              break;
+
+            case PLUG_IN_DEF:
+              g_scanner_set_scope (scanner, PLUG_IN_DEF);
+              token = plug_in_def_deserialize (gimp, scanner, &plug_in_defs);
+              g_scanner_set_scope (scanner, 0);
+              break;
+            default:
+              break;
+            }
+              break;
+
+        case G_TOKEN_RIGHT_PAREN:
+          token = G_TOKEN_LEFT_PAREN;
+          break;
+
+        default: /* do nothing */
+          break;
+        }
+    }
+
+  if (protocol_version != GIMP_PROTOCOL_VERSION   ||
+      file_version     != PLUG_IN_RC_FILE_VERSION ||
+      token            != G_TOKEN_LEFT_PAREN)
+    {
+      if (protocol_version != GIMP_PROTOCOL_VERSION)
+        {
+          g_set_error (error,
+                       GIMP_CONFIG_ERROR, GIMP_CONFIG_ERROR_VERSION,
+                       _("Skipping '%s': wrong GIMP protocol version."),
+                       gimp_file_get_utf8_name (file));
+        }
+      else if (file_version != PLUG_IN_RC_FILE_VERSION)
+        {
+          g_set_error (error,
+                       GIMP_CONFIG_ERROR, GIMP_CONFIG_ERROR_VERSION,
+                       _("Skipping '%s': wrong pluginrc file format version."),
+                       gimp_file_get_utf8_name (file));
+        }
+      else if (token != G_TOKEN_ERROR)
+        {
+          g_scanner_get_next_token (scanner);
+          g_scanner_unexp_token (scanner, token, NULL, NULL, NULL,
+                                 _("fatal parse error"), TRUE);
+        }
+
+      g_slist_free_full (plug_in_defs, (GDestroyNotify) g_object_unref);
+      plug_in_defs = NULL;
+    }
+
+  g_type_class_unref (enum_class);
+
+  gimp_scanner_destroy (scanner);
+
+  return g_slist_reverse (plug_in_defs);
+}
+
+static GTokenType
+plug_in_def_deserialize (Gimp      *gimp,
+                         GScanner  *scanner,
+                         GSList   **plug_in_defs)
+{
+  GimpPlugInDef       *plug_in_def;
+  GimpPlugInProcedure *proc = NULL;
+  gchar               *path;
+  GFile               *file;
+  gint64               mtime;
+  GTokenType           token;
+  GError              *error = NULL;
+
+  if (! gimp_scanner_parse_string (scanner, &path))
+    return G_TOKEN_STRING;
+
+  if (! (path && *path))
+    {
+      g_scanner_error (scanner, "plug-in filename is empty");
+      return G_TOKEN_ERROR;
+    }
+
+  file = gimp_file_new_for_config_path (path, &error);
+  g_free (path);
+
+  if (! file)
+    {
+      g_scanner_error (scanner,
+                       "unable to parse plug-in filename: %s",
+                       error->message);
+      g_clear_error (&error);
+      return G_TOKEN_ERROR;
+    }
+
+  plug_in_def = gimp_plug_in_def_new (file);
+  g_object_unref (file);
+
+  if (! gimp_scanner_parse_int64 (scanner, &mtime))
+    {
+      g_object_unref (plug_in_def);
+      return G_TOKEN_INT;
+    }
+
+  plug_in_def->mtime = mtime;
+
+  token = G_TOKEN_LEFT_PAREN;
+
+  while (g_scanner_peek_next_token (scanner) == token)
+    {
+      token = g_scanner_get_next_token (scanner);
+
+      switch (token)
+        {
+        case G_TOKEN_LEFT_PAREN:
+          token = G_TOKEN_SYMBOL;
+          break;
+
+        case G_TOKEN_SYMBOL:
+          switch (GPOINTER_TO_INT (scanner->value.v_symbol))
+            {
+            case PROC_DEF:
+              token = plug_in_procedure_deserialize (scanner, gimp,
+                                                     plug_in_def->file,
+                                                     &proc);
+
+              if (token == G_TOKEN_LEFT_PAREN)
+                gimp_plug_in_def_add_procedure (plug_in_def, proc);
+
+              if (proc)
+                g_object_unref (proc);
+              break;
+
+            case LOCALE_DEF:
+              token = plug_in_locale_def_deserialize (scanner, plug_in_def);
+              break;
+
+            case HELP_DEF:
+              token = plug_in_help_def_deserialize (scanner, plug_in_def);
+              break;
+
+            case HAS_INIT:
+              token = plug_in_has_init_deserialize (scanner, plug_in_def);
+              break;
+
+            default:
+              break;
+            }
+          break;
+
+        case G_TOKEN_RIGHT_PAREN:
+          token = G_TOKEN_LEFT_PAREN;
+          break;
+
+        default:
+          break;
+        }
+    }
+
+  if (token == G_TOKEN_LEFT_PAREN)
+    {
+      token = G_TOKEN_RIGHT_PAREN;
+
+      if (gimp_scanner_parse_token (scanner, token))
+        {
+          *plug_in_defs = g_slist_prepend (*plug_in_defs, plug_in_def);
+          return G_TOKEN_LEFT_PAREN;
+        }
+    }
+
+  g_object_unref (plug_in_def);
+
+  return token;
+}
+
+static GTokenType
+plug_in_procedure_deserialize (GScanner             *scanner,
+                               Gimp                 *gimp,
+                               GFile                *file,
+                               GimpPlugInProcedure **proc)
+{
+  GimpProcedure   *procedure;
+  GTokenType       token;
+  gchar           *str;
+  gint             proc_type;
+  gint             n_args;
+  gint             n_return_vals;
+  gint             n_menu_paths;
+  gint             i;
+
+  if (! gimp_scanner_parse_string (scanner, &str))
+    return G_TOKEN_STRING;
+
+  if (! (str && *str))
+    {
+      g_scanner_error (scanner, "procedure name is empty");
+      return G_TOKEN_ERROR;
+    }
+
+  if (! gimp_scanner_parse_int (scanner, &proc_type))
+    {
+      g_free (str);
+      return G_TOKEN_INT;
+    }
+
+  if (proc_type != GIMP_PLUGIN &&
+      proc_type != GIMP_EXTENSION)
+    {
+      g_free (str);
+      g_scanner_error (scanner, "procedure type %d is out of range",
+                       proc_type);
+      return G_TOKEN_ERROR;
+    }
+
+  procedure = gimp_plug_in_procedure_new (proc_type, file);
+
+  *proc = GIMP_PLUG_IN_PROCEDURE (procedure);
+
+  gimp_object_take_name (GIMP_OBJECT (procedure),
+                         gimp_canonicalize_identifier (str));
+
+  procedure->original_name = str;
+
+  if (! gimp_scanner_parse_string (scanner, &procedure->blurb))
+    return G_TOKEN_STRING;
+  if (! gimp_scanner_parse_string (scanner, &procedure->help))
+    return G_TOKEN_STRING;
+  if (! gimp_scanner_parse_string (scanner, &procedure->author))
+    return G_TOKEN_STRING;
+  if (! gimp_scanner_parse_string (scanner, &procedure->copyright))
+    return G_TOKEN_STRING;
+  if (! gimp_scanner_parse_string (scanner, &procedure->date))
+    return G_TOKEN_STRING;
+  if (! gimp_scanner_parse_string (scanner, &(*proc)->menu_label))
+    return G_TOKEN_STRING;
+
+  if (! gimp_scanner_parse_int (scanner, &n_menu_paths))
+    return G_TOKEN_INT;
+
+  for (i = 0; i < n_menu_paths; i++)
+    {
+      token = plug_in_menu_path_deserialize (scanner, *proc);
+      if (token != G_TOKEN_LEFT_PAREN)
+        return token;
+    }
+
+  token = plug_in_icon_deserialize (scanner, *proc);
+  if (token != G_TOKEN_LEFT_PAREN)
+    return token;
+
+  token = plug_in_file_proc_deserialize (scanner, *proc);
+  if (token != G_TOKEN_LEFT_PAREN)
+    return token;
+
+  if (! gimp_scanner_parse_string (scanner, &str))
+    return G_TOKEN_STRING;
+
+  gimp_plug_in_procedure_set_image_types (*proc, str);
+  g_free (str);
+
+  if (! gimp_scanner_parse_int (scanner, (gint *) &n_args))
+    return G_TOKEN_INT;
+  if (! gimp_scanner_parse_int (scanner, (gint *) &n_return_vals))
+    return G_TOKEN_INT;
+
+  for (i = 0; i < n_args; i++)
+    {
+      token = plug_in_proc_arg_deserialize (scanner, gimp, procedure, FALSE);
+      if (token != G_TOKEN_LEFT_PAREN)
+        return token;
+    }
+
+  for (i = 0; i < n_return_vals; i++)
+    {
+      token = plug_in_proc_arg_deserialize (scanner, gimp, procedure, TRUE);
+      if (token != G_TOKEN_LEFT_PAREN)
+        return token;
+    }
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_RIGHT_PAREN))
+    return G_TOKEN_RIGHT_PAREN;
+
+  return G_TOKEN_LEFT_PAREN;
+}
+
+static GTokenType
+plug_in_menu_path_deserialize (GScanner            *scanner,
+                               GimpPlugInProcedure *proc)
+{
+  gchar *menu_path;
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_LEFT_PAREN))
+    return G_TOKEN_LEFT_PAREN;
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_SYMBOL) ||
+      GPOINTER_TO_INT (scanner->value.v_symbol) != MENU_PATH)
+    return G_TOKEN_SYMBOL;
+
+  if (! gimp_scanner_parse_string (scanner, &menu_path))
+    return G_TOKEN_STRING;
+
+  proc->menu_paths = g_list_append (proc->menu_paths, menu_path);
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_RIGHT_PAREN))
+    return G_TOKEN_RIGHT_PAREN;
+
+  return G_TOKEN_LEFT_PAREN;
+}
+
+static GTokenType
+plug_in_icon_deserialize (GScanner            *scanner,
+                          GimpPlugInProcedure *proc)
+{
+  GEnumClass   *enum_class;
+  GEnumValue   *enum_value;
+  GimpIconType  icon_type;
+  gint          icon_data_length;
+  gchar        *icon_name;
+  guint8       *icon_data;
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_LEFT_PAREN))
+    return G_TOKEN_LEFT_PAREN;
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_SYMBOL) ||
+      GPOINTER_TO_INT (scanner->value.v_symbol) != ICON)
+    return G_TOKEN_SYMBOL;
+
+  enum_class = g_type_class_peek (GIMP_TYPE_ICON_TYPE);
+
+  switch (g_scanner_peek_next_token (scanner))
+    {
+    case G_TOKEN_IDENTIFIER:
+      g_scanner_get_next_token (scanner);
+
+      enum_value = g_enum_get_value_by_nick (G_ENUM_CLASS (enum_class),
+                                             scanner->value.v_identifier);
+      if (!enum_value)
+        enum_value = g_enum_get_value_by_name (G_ENUM_CLASS (enum_class),
+                                               scanner->value.v_identifier);
+
+      if (!enum_value)
+        {
+          g_scanner_error (scanner,
+                           _("invalid value '%s' for icon type"),
+                           scanner->value.v_identifier);
+          return G_TOKEN_NONE;
+        }
+      break;
+
+    case G_TOKEN_INT:
+      g_scanner_get_next_token (scanner);
+
+      enum_value = g_enum_get_value (enum_class,
+                                     (gint) scanner->value.v_int64);
+
+      if (!enum_value)
+        {
+          g_scanner_error (scanner,
+                           _("invalid value '%ld' for icon type"),
+                           (glong) scanner->value.v_int64);
+          return G_TOKEN_NONE;
+        }
+      break;
+
+    default:
+      return G_TOKEN_IDENTIFIER;
+    }
+
+  icon_type = enum_value->value;
+
+  if (! gimp_scanner_parse_int (scanner, &icon_data_length))
+    return G_TOKEN_INT;
+
+  switch (icon_type)
+    {
+    case GIMP_ICON_TYPE_ICON_NAME:
+    case GIMP_ICON_TYPE_IMAGE_FILE:
+      icon_data_length = -1;
+
+      if (! gimp_scanner_parse_string_no_validate (scanner, &icon_name))
+        return G_TOKEN_STRING;
+
+      icon_data = (guint8 *) icon_name;
+      break;
+
+    case GIMP_ICON_TYPE_INLINE_PIXBUF:
+      if (icon_data_length < 0)
+        return G_TOKEN_STRING;
+
+      if (! gimp_scanner_parse_data (scanner, icon_data_length, &icon_data))
+        return G_TOKEN_STRING;
+      break;
+    }
+
+  gimp_plug_in_procedure_take_icon (proc, icon_type,
+                                    icon_data, icon_data_length);
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_RIGHT_PAREN))
+    return G_TOKEN_RIGHT_PAREN;
+
+  return G_TOKEN_LEFT_PAREN;
+}
+
+static GTokenType
+plug_in_file_proc_deserialize (GScanner            *scanner,
+                               GimpPlugInProcedure *proc)
+{
+  GTokenType token;
+  gint       symbol;
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_LEFT_PAREN))
+    return G_TOKEN_LEFT_PAREN;
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_SYMBOL))
+    return G_TOKEN_SYMBOL;
+
+  symbol = GPOINTER_TO_INT (scanner->value.v_symbol);
+  if (symbol != LOAD_PROC && symbol != SAVE_PROC)
+    return G_TOKEN_SYMBOL;
+
+  proc->file_proc = TRUE;
+
+  g_scanner_set_scope (scanner, symbol);
+
+  while (g_scanner_peek_next_token (scanner) == G_TOKEN_LEFT_PAREN)
+    {
+      token = g_scanner_get_next_token (scanner);
+
+      if (token != G_TOKEN_LEFT_PAREN)
+        return token;
+
+      if (! gimp_scanner_parse_token (scanner, G_TOKEN_SYMBOL))
+        return G_TOKEN_SYMBOL;
+
+      symbol = GPOINTER_TO_INT (scanner->value.v_symbol);
+
+      switch (symbol)
+        {
+        case EXTENSIONS:
+          {
+            gchar *extensions;
+
+            if (! gimp_scanner_parse_string (scanner, &extensions))
+              return G_TOKEN_STRING;
+
+            g_free (proc->extensions);
+            proc->extensions = extensions;
+          }
+          break;
+
+        case PREFIXES:
+          {
+            gchar *prefixes;
+
+            if (! gimp_scanner_parse_string (scanner, &prefixes))
+              return G_TOKEN_STRING;
+
+            g_free (proc->prefixes);
+            proc->prefixes = prefixes;
+          }
+          break;
+
+        case MAGICS:
+          {
+            gchar *magics;
+
+            if (! gimp_scanner_parse_string_no_validate (scanner, &magics))
+              return G_TOKEN_STRING;
+
+            g_free (proc->magics);
+            proc->magics = magics;
+          }
+          break;
+
+        case PRIORITY:
+          {
+            gint priority;
+
+            if (! gimp_scanner_parse_int (scanner, &priority))
+              return G_TOKEN_INT;
+
+            gimp_plug_in_procedure_set_priority (proc, priority);
+          }
+          break;
+
+        case MIME_TYPES:
+          {
+            gchar *mime_types;
+
+            if (! gimp_scanner_parse_string (scanner, &mime_types))
+              return G_TOKEN_STRING;
+
+            gimp_plug_in_procedure_set_mime_types (proc, mime_types);
+
+            g_free (mime_types);
+          }
+          break;
+
+        case HANDLES_URI:
+          gimp_plug_in_procedure_set_handles_uri (proc);
+          break;
+
+        case HANDLES_RAW:
+          gimp_plug_in_procedure_set_handles_raw (proc);
+          break;
+
+        case THUMB_LOADER:
+          {
+            gchar *thumb_loader;
+
+            if (! gimp_scanner_parse_string (scanner, &thumb_loader))
+              return G_TOKEN_STRING;
+
+            gimp_plug_in_procedure_set_thumb_loader (proc, thumb_loader);
+
+            g_free (thumb_loader);
+          }
+          break;
+
+        default:
+           return G_TOKEN_SYMBOL;
+        }
+      if (! gimp_scanner_parse_token (scanner, G_TOKEN_RIGHT_PAREN))
+        return G_TOKEN_RIGHT_PAREN;
+    }
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_RIGHT_PAREN))
+    return G_TOKEN_RIGHT_PAREN;
+
+  g_scanner_set_scope (scanner, PLUG_IN_DEF);
+
+  return G_TOKEN_LEFT_PAREN;
+}
+
+static GTokenType
+plug_in_proc_arg_deserialize (GScanner      *scanner,
+                              Gimp          *gimp,
+                              GimpProcedure *procedure,
+                              gboolean       return_value)
+{
+  GTokenType  token;
+  gint        arg_type;
+  gchar      *name = NULL;
+  gchar      *desc = NULL;
+  GParamSpec *pspec;
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_LEFT_PAREN))
+    {
+      token = G_TOKEN_LEFT_PAREN;
+      goto error;
+    }
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_SYMBOL) ||
+      GPOINTER_TO_INT (scanner->value.v_symbol) != PROC_ARG)
+    {
+      token = G_TOKEN_SYMBOL;
+      goto error;
+    }
+
+  if (! gimp_scanner_parse_int (scanner, (gint *) &arg_type))
+    {
+      token = G_TOKEN_INT;
+      goto error;
+    }
+  if (! gimp_scanner_parse_string (scanner, &name))
+    {
+      token = G_TOKEN_STRING;
+      goto error;
+    }
+  if (! gimp_scanner_parse_string (scanner, &desc))
+    {
+      token = G_TOKEN_STRING;
+      goto error;
+    }
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_RIGHT_PAREN))
+    {
+      token = G_TOKEN_RIGHT_PAREN;
+      goto error;
+    }
+
+  token = G_TOKEN_LEFT_PAREN;
+
+  pspec = gimp_pdb_compat_param_spec (gimp, arg_type, name, desc, NULL);
+
+  if (return_value)
+    gimp_procedure_add_return_value (procedure, pspec);
+  else
+    gimp_procedure_add_argument (procedure, pspec);
+
+ error:
+
+  g_free (name);
+  g_free (desc);
+
+  return token;
+}
+
+static GTokenType
+plug_in_locale_def_deserialize (GScanner      *scanner,
+                                GimpPlugInDef *plug_in_def)
+{
+  gchar *domain_name;
+  gchar *domain_path   = NULL;
+  gchar *expanded_path = NULL;
+
+  if (! gimp_scanner_parse_string (scanner, &domain_name))
+    return G_TOKEN_STRING;
+
+  if (gimp_scanner_parse_string (scanner, &domain_path))
+    expanded_path = gimp_config_path_expand (domain_path, TRUE, NULL);
+
+  gimp_plug_in_def_set_locale_domain (plug_in_def, domain_name, expanded_path);
+
+  g_free (domain_name);
+  g_free (domain_path);
+  g_free (expanded_path);
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_RIGHT_PAREN))
+    return G_TOKEN_RIGHT_PAREN;
+
+  return G_TOKEN_LEFT_PAREN;
+}
+
+static GTokenType
+plug_in_help_def_deserialize (GScanner      *scanner,
+                              GimpPlugInDef *plug_in_def)
+{
+  gchar *domain_name;
+  gchar *domain_uri;
+
+  if (! gimp_scanner_parse_string (scanner, &domain_name))
+    return G_TOKEN_STRING;
+
+  if (! gimp_scanner_parse_string (scanner, &domain_uri))
+    domain_uri = NULL;
+
+  gimp_plug_in_def_set_help_domain (plug_in_def, domain_name, domain_uri);
+
+  g_free (domain_name);
+  g_free (domain_uri);
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_RIGHT_PAREN))
+    return G_TOKEN_RIGHT_PAREN;
+
+  return G_TOKEN_LEFT_PAREN;
+}
+
+static GTokenType
+plug_in_has_init_deserialize (GScanner      *scanner,
+                              GimpPlugInDef *plug_in_def)
+{
+  gimp_plug_in_def_set_has_init (plug_in_def, TRUE);
+
+  if (! gimp_scanner_parse_token (scanner, G_TOKEN_RIGHT_PAREN))
+    return G_TOKEN_RIGHT_PAREN;
+
+  return G_TOKEN_LEFT_PAREN;
+}
+
+
+/* serialize functions */
+
+gboolean
+plug_in_rc_write (GSList  *plug_in_defs,
+                  GFile   *file,
+                  GError **error)
+{
+  GimpConfigWriter *writer;
+  GEnumClass       *enum_class;
+  GSList           *list;
+
+  writer = gimp_config_writer_new_gfile (file,
+                                         FALSE,
+                                         "GIMP pluginrc\n\n"
+                                         "This file can safely be removed and "
+                                         "will be automatically regenerated by "
+                                         "querying the installed plug-ins.",
+                                         error);
+  if (!writer)
+    return FALSE;
+
+  enum_class = g_type_class_ref (GIMP_TYPE_ICON_TYPE);
+
+  gimp_config_writer_open (writer, "protocol-version");
+  gimp_config_writer_printf (writer, "%d", GIMP_PROTOCOL_VERSION);
+  gimp_config_writer_close (writer);
+
+  gimp_config_writer_open (writer, "file-version");
+  gimp_config_writer_printf (writer, "%d", PLUG_IN_RC_FILE_VERSION);
+  gimp_config_writer_close (writer);
+
+  gimp_config_writer_linefeed (writer);
+
+  for (list = plug_in_defs; list; list = list->next)
+    {
+      GimpPlugInDef *plug_in_def = list->data;
+
+      if (plug_in_def->procedures)
+        {
+          GSList *list2;
+          gchar  *path;
+
+          path = gimp_file_get_config_path (plug_in_def->file, NULL);
+          if (! path)
+            continue;
+
+          gimp_config_writer_open (writer, "plug-in-def");
+          gimp_config_writer_string (writer, path);
+          gimp_config_writer_printf (writer, "%"G_GINT64_FORMAT,
+                                     plug_in_def->mtime);
+
+          g_free (path);
+
+          for (list2 = plug_in_def->procedures; list2; list2 = list2->next)
+            {
+              GimpPlugInProcedure *proc      = list2->data;
+              GimpProcedure       *procedure = GIMP_PROCEDURE (proc);
+              GEnumValue          *enum_value;
+              GList               *list3;
+              gint                 i;
+
+              if (proc->installed_during_init)
+                continue;
+
+              gimp_config_writer_open (writer, "proc-def");
+              gimp_config_writer_printf (writer, "\"%s\" %d",
+                                         procedure->original_name,
+                                         procedure->proc_type);
+              gimp_config_writer_linefeed (writer);
+              gimp_config_writer_string (writer, procedure->blurb);
+              gimp_config_writer_linefeed (writer);
+              gimp_config_writer_string (writer, procedure->help);
+              gimp_config_writer_linefeed (writer);
+              gimp_config_writer_string (writer, procedure->author);
+              gimp_config_writer_linefeed (writer);
+              gimp_config_writer_string (writer, procedure->copyright);
+              gimp_config_writer_linefeed (writer);
+              gimp_config_writer_string (writer, procedure->date);
+              gimp_config_writer_linefeed (writer);
+              gimp_config_writer_string (writer, proc->menu_label);
+              gimp_config_writer_linefeed (writer);
+
+              gimp_config_writer_printf (writer, "%d",
+                                         g_list_length (proc->menu_paths));
+              for (list3 = proc->menu_paths; list3; list3 = list3->next)
+                {
+                  gimp_config_writer_open (writer, "menu-path");
+                  gimp_config_writer_string (writer, list3->data);
+                  gimp_config_writer_close (writer);
+                }
+
+              gimp_config_writer_open (writer, "icon");
+              enum_value = g_enum_get_value (enum_class, proc->icon_type);
+              gimp_config_writer_identifier (writer, enum_value->value_nick);
+              gimp_config_writer_printf (writer, "%d",
+                                         proc->icon_data_length);
+
+              switch (proc->icon_type)
+                {
+                case GIMP_ICON_TYPE_ICON_NAME:
+                case GIMP_ICON_TYPE_IMAGE_FILE:
+                  gimp_config_writer_string (writer, (gchar *) proc->icon_data);
+                  break;
+
+                case GIMP_ICON_TYPE_INLINE_PIXBUF:
+                  gimp_config_writer_data (writer, proc->icon_data_length,
+                                           proc->icon_data);
+                  break;
+                }
+
+              gimp_config_writer_close (writer);
+
+              if (proc->file_proc)
+                {
+                  gimp_config_writer_open (writer,
+                                           proc->image_types ?
+                                           "save-proc" : "load-proc");
+
+                  if (proc->extensions && *proc->extensions)
+                    {
+                      gimp_config_writer_open (writer, "extensions");
+                      gimp_config_writer_string (writer, proc->extensions);
+                      gimp_config_writer_close (writer);
+                    }
+
+                  if (proc->prefixes && *proc->prefixes)
+                    {
+                      gimp_config_writer_open (writer, "prefixes");
+                      gimp_config_writer_string (writer, proc->prefixes);
+                      gimp_config_writer_close (writer);
+                    }
+
+                  if (proc->magics && *proc->magics)
+                    {
+                      gimp_config_writer_open (writer, "magics");
+                      gimp_config_writer_string (writer, proc->magics);
+                      gimp_config_writer_close (writer);
+                    }
+
+                  if (proc->priority)
+                    {
+                      gimp_config_writer_open (writer, "priority");
+                      gimp_config_writer_printf (writer, "%d", proc->priority);
+                      gimp_config_writer_close (writer);
+                    }
+
+                  if (proc->mime_types && *proc->mime_types)
+                    {
+                      gimp_config_writer_open (writer, "mime-types");
+                      gimp_config_writer_string (writer, proc->mime_types);
+                      gimp_config_writer_close (writer);
+                    }
+
+                  if (proc->priority)
+                    {
+                      gimp_config_writer_open (writer, "priority");
+                      gimp_config_writer_printf (writer, "%d", proc->priority);
+                      gimp_config_writer_close (writer);
+                    }
+
+                  if (proc->handles_uri)
+                    {
+                      gimp_config_writer_open (writer, "handles-uri");
+                      gimp_config_writer_close (writer);
+                    }
+
+                  if (proc->handles_raw && ! proc->image_types)
+                    {
+                      gimp_config_writer_open (writer, "handles-raw");
+                      gimp_config_writer_close (writer);
+                    }
+
+                  if (proc->thumb_loader)
+                    {
+                      gimp_config_writer_open (writer, "thumb-loader");
+                      gimp_config_writer_string (writer, proc->thumb_loader);
+                      gimp_config_writer_close (writer);
+                    }
+
+                  gimp_config_writer_close (writer);
+                }
+
+              gimp_config_writer_linefeed (writer);
+
+              gimp_config_writer_string (writer, proc->image_types);
+              gimp_config_writer_linefeed (writer);
+
+              gimp_config_writer_printf (writer, "%d %d",
+                                         procedure->num_args,
+                                         procedure->num_values);
+
+              for (i = 0; i < procedure->num_args; i++)
+                {
+                  GParamSpec *pspec = procedure->args[i];
+
+                  gimp_config_writer_open (writer, "proc-arg");
+                  gimp_config_writer_printf (writer, "%d",
+                                             gimp_pdb_compat_arg_type_from_gtype (G_PARAM_SPEC_VALUE_TYPE (pspec)));
+
+                  gimp_config_writer_string (writer,
+                                             g_param_spec_get_name (pspec));
+                  gimp_config_writer_string (writer,
+                                             g_param_spec_get_blurb (pspec));
+
+                  gimp_config_writer_close (writer);
+                }
+
+              for (i = 0; i < procedure->num_values; i++)
+                {
+                  GParamSpec *pspec = procedure->values[i];
+
+                  gimp_config_writer_open (writer, "proc-arg");
+                  gimp_config_writer_printf (writer, "%d",
+                                             gimp_pdb_compat_arg_type_from_gtype (G_PARAM_SPEC_VALUE_TYPE (pspec)));
+
+                  gimp_config_writer_string (writer,
+                                             g_param_spec_get_name (pspec));
+                  gimp_config_writer_string (writer,
+                                             g_param_spec_get_blurb (pspec));
+
+                  gimp_config_writer_close (writer);
+                }
+
+              gimp_config_writer_close (writer);
+            }
+
+          if (plug_in_def->locale_domain_name)
+            {
+              gimp_config_writer_open (writer, "locale-def");
+              gimp_config_writer_string (writer,
+                                         plug_in_def->locale_domain_name);
+
+              if (plug_in_def->locale_domain_path)
+                {
+                  path = gimp_config_path_unexpand (plug_in_def->locale_domain_path,
+                                                    TRUE, NULL);
+                  if (path)
+                    {
+                      gimp_config_writer_string (writer, path);
+                      g_free (path);
+                    }
+                }
+
+              gimp_config_writer_close (writer);
+            }
+
+          if (plug_in_def->help_domain_name)
+            {
+              gimp_config_writer_open (writer, "help-def");
+              gimp_config_writer_string (writer,
+                                         plug_in_def->help_domain_name);
+
+              if (plug_in_def->help_domain_uri)
+                gimp_config_writer_string (writer,
+                                           plug_in_def->help_domain_uri);
+
+             gimp_config_writer_close (writer);
+            }
+
+          if (plug_in_def->has_init)
+            {
+              gimp_config_writer_open (writer, "has-init");
+              gimp_config_writer_close (writer);
+            }
+
+          gimp_config_writer_close (writer);
+        }
+    }
+
+  g_type_class_unref (enum_class);
+
+  return gimp_config_writer_finish (writer, "end of pluginrc", error);
+}
diff --git a/app/plug-in/plug-in-rc.h b/app/plug-in/plug-in-rc.h
new file mode 100644
index 0000000..5a54b0b
--- /dev/null
+++ b/app/plug-in/plug-in-rc.h
@@ -0,0 +1,33 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * plug-in-rc.h
+ * Copyright (C) 2001  Sven Neumann <sven@gimp.org>
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __PLUG_IN_RC_H__
+#define __PLUG_IN_RC_H__
+
+
+GSList   * plug_in_rc_parse (Gimp    *gimp,
+                             GFile   *file,
+                             GError **error);
+gboolean   plug_in_rc_write (GSList  *plug_in_defs,
+                             GFile   *file,
+                             GError **error);
+
+
+#endif /* __PLUG_IN_RC_H__ */
diff --git a/app/plug-in/plug-in-types.h b/app/plug-in/plug-in-types.h
new file mode 100644
index 0000000..70d7ca0
--- /dev/null
+++ b/app/plug-in/plug-in-types.h
@@ -0,0 +1,40 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __PLUG_IN_TYPES_H__
+#define __PLUG_IN_TYPES_H__
+
+
+#include "core/core-types.h"
+
+#include "plug-in/plug-in-enums.h"
+
+
+#define GIMP_PLUG_IN_TILE_WIDTH  128
+#define GIMP_PLUG_IN_TILE_HEIGHT 128
+
+
+typedef struct _GimpPlugIn           GimpPlugIn;
+typedef struct _GimpPlugInDebug      GimpPlugInDebug;
+typedef struct _GimpPlugInDef        GimpPlugInDef;
+typedef struct _GimpPlugInManager    GimpPlugInManager;
+typedef struct _GimpPlugInMenuBranch GimpPlugInMenuBranch;
+typedef struct _GimpPlugInProcFrame  GimpPlugInProcFrame;
+typedef struct _GimpPlugInShm        GimpPlugInShm;
+
+
+#endif /* __PLUG_IN_TYPES_H__ */