Adding upstream version 2.10.34.upstream/2.10.34upstream

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

31 files changed, 9910 insertions, 0 deletions

diff --git a/libgimpcolor/Makefile.am b/libgimpcolor/Makefile.am
new file mode 100644
index 0000000..767f3b9
--- /dev/null
+++ b/libgimpcolor/Makefile.am
@@ -0,0 +1,148 @@
+## Process this file with automake to produce Makefile.in
+
+libgimpbase = $(top_builddir)/libgimpbase/libgimpbase-$(GIMP_API_VERSION).la
+
+if PLATFORM_WIN32
+no_undefined = -no-undefined
+endif
+
+if PLATFORM_WIN32
+else
+libm = -lm
+endif
+
+if OS_WIN32
+gimpcolor_def = gimpcolor.def
+libgimpcolor_export_symbols = -export-symbols $(srcdir)/gimpcolor.def
+
+install-libtool-import-lib:
+	$(INSTALL) .libs/libgimpcolor-$(GIMP_API_VERSION).dll.a $(DESTDIR)$(libdir)
+	$(INSTALL) $(srcdir)/gimpcolor.def $(DESTDIR)$(libdir)
+
+uninstall-libtool-import-lib:
+	-rm $(DESTDIR)$(libdir)/libgimpcolor-$(GIMP_API_VERSION).dll.a
+	-rm $(DESTDIR)$(libdir)/gimpcolor.def
+else
+install-libtool-import-lib:
+uninstall-libtool-import-lib:
+endif
+
+if MS_LIB_AVAILABLE
+noinst_DATA = gimpcolor-$(GIMP_API_VERSION).lib
+
+install-ms-lib:
+	$(INSTALL) gimpcolor-$(GIMP_API_VERSION).lib $(DESTDIR)$(libdir)
+
+uninstall-ms-lib:
+	-rm $(DESTDIR)$(libdir)/gimpcolor-$(GIMP_API_VERSION).lib
+
+gimpcolor-@GIMP_API_VERSION@.lib: gimpcolor.def
+	lib -name:libgimpcolor-$(GIMP_API_VERSION)-@LT_CURRENT_MINUS_AGE@.dll -def:gimpcolor.def -out:$@
+
+else
+install-ms-lib:
+uninstall-ms-lib:
+endif
+
+libgimpcolorincludedir = $(includedir)/gimp-$(GIMP_API_VERSION)/libgimpcolor
+
+AM_CPPFLAGS = \
+	-DG_LOG_DOMAIN=\"LibGimpColor\"	\
+	-DGIMP_COLOR_COMPILATION	\
+	-I$(top_srcdir)			\
+	$(GEGL_CFLAGS)			\
+	$(CAIRO_CFLAGS)			\
+	$(GDK_PIXBUF_CFLAGS)		\
+	$(LCMS_CFLAGS)			\
+	-I$(includedir)
+
+EXTRA_DIST = \
+	gimpcolor.def
+
+lib_LTLIBRARIES = libgimpcolor-@GIMP_API_VERSION@.la
+
+libgimpcolor_@GIMP_API_VERSION@_la_SOURCES = \
+	gimpcolor.h			\
+	gimpcolortypes.h		\
+	gimpadaptivesupersample.c	\
+	gimpadaptivesupersample.h	\
+	gimpbilinear.c			\
+	gimpbilinear.h			\
+	gimpcairo.c			\
+	gimpcairo.h			\
+	gimpcmyk.c			\
+	gimpcmyk.h			\
+	gimpcolormanaged.c		\
+	gimpcolormanaged.h		\
+	gimpcolorprofile.c		\
+	gimpcolorprofile.h		\
+	gimpcolorspace.c		\
+	gimpcolorspace.h		\
+	gimpcolortransform.c		\
+	gimpcolortransform.h		\
+	gimphsl.c			\
+	gimphsl.h			\
+	gimphsv.c			\
+	gimphsv.h			\
+	gimppixbuf.c			\
+	gimppixbuf.h			\
+	gimprgb.c			\
+	gimprgb.h			\
+	gimprgb-parse.c
+
+libgimpcolorinclude_HEADERS = \
+	gimpcolor.h			\
+	gimpcolortypes.h		\
+	gimpadaptivesupersample.h	\
+	gimpbilinear.h			\
+	gimpcairo.h			\
+	gimpcmyk.h			\
+	gimpcolormanaged.h		\
+	gimpcolorprofile.h		\
+	gimpcolorspace.h		\
+	gimpcolortransform.h		\
+	gimphsl.h			\
+	gimphsv.h			\
+	gimppixbuf.h			\
+	gimprgb.h
+
+libgimpcolor_@GIMP_API_VERSION@_la_LDFLAGS = \
+	-version-info $(LT_VERSION_INFO)	\
+	$(no_undefined) 			\
+	$(libgimpcolor_export_symbols)
+
+EXTRA_libgimpcolor_@GIMP_API_VERSION@_la_DEPENDENCIES = $(gimpcolor_def)
+
+libgimpcolor_@GIMP_API_VERSION@_la_LIBADD = \
+	$(libgimpbase)		\
+	$(GEGL_LIBS)		\
+	$(CAIRO_LIBS)		\
+	$(GDK_PIXBUF_LIBS)	\
+	$(LCMS_LIBS)		\
+	$(libm)
+
+
+#
+# test programs, not to be built by default and never installed
+#
+
+TESTS = test-color-parser$(EXEEXT)
+
+EXTRA_PROGRAMS = test-color-parser
+
+test_color_parser_DEPENDENCIES = \
+	$(libgimpbase)	\
+	$(top_builddir)/libgimpcolor/libgimpcolor-$(GIMP_API_VERSION).la
+
+test_color_parser_LDADD = \
+	$(CAIRO_LIBS) 		\
+	$(GLIB_LIBS) 		\
+	$(test_color_parser_DEPENDENCIES)
+
+
+CLEANFILES = $(EXTRA_PROGRAMS)
+
+
+install-data-local: install-ms-lib install-libtool-import-lib
+
+uninstall-local: uninstall-ms-lib uninstall-libtool-import-lib
diff --git a/libgimpcolor/Makefile.in b/libgimpcolor/Makefile.in
new file mode 100644
index 0000000..b3d7659
--- /dev/null
+++ b/libgimpcolor/Makefile.in
@@ -0,0 +1,1523 @@
+# 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
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+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
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+tst=$$dir$$f; log='$@'; 				\
+if test -n '$(DISABLE_HARD_ERRORS)'; then		\
+  am__enable_hard_errors=no; 				\
+else							\
+  am__enable_hard_errors=yes; 				\
+fi; 							\
+case " $(XFAIL_TESTS) " in				\
+  *[\ \	]$$f[\ \	]* | *[\ \	]$$dir$$f[\ \	]*) \
+    am__expect_failure=yes;;				\
+  *)							\
+    am__expect_failure=no;;				\
+esac; 							\
+$(AM_TESTS_ENVIRONMENT) $(TESTS_ENVIRONMENT)
+# A shell command to get the names of the tests scripts with any registered
+# extension removed (i.e., equivalently, the names of the test logs, with
+# the '.log' extension removed).  The result is saved in the shell variable
+# '$bases'.  This honors runtime overriding of TESTS and TEST_LOGS.  Sadly,
+# we cannot use something simpler, involving e.g., "$(TEST_LOGS:.log=)",
+# since that might cause problem with VPATH rewrites for suffix-less tests.
+# See also 'test-harness-vpath-rewrite.sh' and 'test-trs-basic.sh'.
+am__set_TESTS_bases = \
+  bases='$(TEST_LOGS)'; \
+  bases=`for i in $$bases; do echo $$i; done | sed 's/\.log$$//'`; \
+  bases=`echo $$bases`
+AM_TESTSUITE_SUMMARY_HEADER = ' for $(PACKAGE_STRING)'
+RECHECK_LOGS = $(TEST_LOGS)
+AM_RECURSIVE_TARGETS = check recheck
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+am__set_b = \
+  case '$@' in \
+    */*) \
+      case '$*' in \
+        */*) b='$*';; \
+          *) b=`echo '$@' | sed 's/\.log$$//'`; \
+       esac;; \
+    *) \
+      b='$*';; \
+  esac
+am__test_logs1 = $(TESTS:=.log)
+am__test_logs2 = $(am__test_logs1:@EXEEXT@.log=.log)
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+TEST_LOG_DRIVER = $(SHELL) $(top_srcdir)/test-driver
+TEST_LOG_COMPILE = $(TEST_LOG_COMPILER) $(AM_TEST_LOG_FLAGS) \
+	$(TEST_LOG_FLAGS)
+am__DIST_COMMON = $(srcdir)/Makefile.in $(top_srcdir)/depcomp \
+	$(top_srcdir)/test-driver
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+@MS_LIB_AVAILABLE_TRUE@noinst_DATA = gimpcolor-$(GIMP_API_VERSION).lib
+libgimpcolorincludedir = $(includedir)/gimp-$(GIMP_API_VERSION)/libgimpcolor
+AM_CPPFLAGS = \
+	-DG_LOG_DOMAIN=\"LibGimpColor\"	\
+	-DGIMP_COLOR_COMPILATION	\
+	-I$(top_srcdir)			\
+	$(GEGL_CFLAGS)			\
+	$(CAIRO_CFLAGS)			\
+	$(GDK_PIXBUF_CFLAGS)		\
+	$(LCMS_CFLAGS)			\
+	-I$(includedir)
+
+EXTRA_DIST = \
+	gimpcolor.def
+
+lib_LTLIBRARIES = libgimpcolor-@GIMP_API_VERSION@.la
+libgimpcolor_@GIMP_API_VERSION@_la_SOURCES = \
+	gimpcolor.h			\
+	gimpcolortypes.h		\
+	gimpadaptivesupersample.c	\
+	gimpadaptivesupersample.h	\
+	gimpbilinear.c			\
+	gimpbilinear.h			\
+	gimpcairo.c			\
+	gimpcairo.h			\
+	gimpcmyk.c			\
+	gimpcmyk.h			\
+	gimpcolormanaged.c		\
+	gimpcolormanaged.h		\
+	gimpcolorprofile.c		\
+	gimpcolorprofile.h		\
+	gimpcolorspace.c		\
+	gimpcolorspace.h		\
+	gimpcolortransform.c		\
+	gimpcolortransform.h		\
+	gimphsl.c			\
+	gimphsl.h			\
+	gimphsv.c			\
+	gimphsv.h			\
+	gimppixbuf.c			\
+	gimppixbuf.h			\
+	gimprgb.c			\
+	gimprgb.h			\
+	gimprgb-parse.c
+
+libgimpcolorinclude_HEADERS = \
+	gimpcolor.h			\
+	gimpcolortypes.h		\
+	gimpadaptivesupersample.h	\
+	gimpbilinear.h			\
+	gimpcairo.h			\
+	gimpcmyk.h			\
+	gimpcolormanaged.h		\
+	gimpcolorprofile.h		\
+	gimpcolorspace.h		\
+	gimpcolortransform.h		\
+	gimphsl.h			\
+	gimphsv.h			\
+	gimppixbuf.h			\
+	gimprgb.h
+
+libgimpcolor_@GIMP_API_VERSION@_la_LDFLAGS = \
+	-version-info $(LT_VERSION_INFO)	\
+	$(no_undefined) 			\
+	$(libgimpcolor_export_symbols)
+
+EXTRA_libgimpcolor_@GIMP_API_VERSION@_la_DEPENDENCIES = $(gimpcolor_def)
+libgimpcolor_@GIMP_API_VERSION@_la_LIBADD = \
+	$(libgimpbase)		\
+	$(GEGL_LIBS)		\
+	$(CAIRO_LIBS)		\
+	$(GDK_PIXBUF_LIBS)	\
+	$(LCMS_LIBS)		\
+	$(libm)
+
+
+#
+# test programs, not to be built by default and never installed
+#
+TESTS = test-color-parser$(EXEEXT)
+test_color_parser_DEPENDENCIES = \
+	$(libgimpbase)	\
+	$(top_builddir)/libgimpcolor/libgimpcolor-$(GIMP_API_VERSION).la
+
+test_color_parser_LDADD = \
+	$(CAIRO_LIBS) 		\
+	$(GLIB_LIBS) 		\
+	$(test_color_parser_DEPENDENCIES)
+
+CLEANFILES = $(EXTRA_PROGRAMS)
+all: all-am
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .log .o .obj .test .test$(EXEEXT) .trs
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu libgimpcolor/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu libgimpcolor/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+install-libLTLIBRARIES: $(lib_LTLIBRARIES)
+	@$(NORMAL_INSTALL)
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	list2=; for p in $$list; do \
+	  if test -f $$p; then \
+	    list2="$$list2 $$p"; \
+	  else :; fi; \
+	done; \
+	test -z "$$list2" || { \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(libdir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(libdir)" || exit 1; \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(libdir)'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(libdir)"; \
+	}
+
+uninstall-libLTLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(libdir)/$$f'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(libdir)/$$f"; \
+	done
+
+clean-libLTLIBRARIES:
+	-test -z "$(lib_LTLIBRARIES)" || rm -f $(lib_LTLIBRARIES)
+	@list='$(lib_LTLIBRARIES)'; \
+	locs=`for p in $$list; do echo $$p; done | \
+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
+	      sort -u`; \
+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
+	  rm -f $${locs}; \
+	}
+
+libgimpcolor-@GIMP_API_VERSION@.la: $(libgimpcolor_@GIMP_API_VERSION@_la_OBJECTS) $(libgimpcolor_@GIMP_API_VERSION@_la_DEPENDENCIES) $(EXTRA_libgimpcolor_@GIMP_API_VERSION@_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libgimpcolor_@GIMP_API_VERSION@_la_LINK) -rpath $(libdir) $(libgimpcolor_@GIMP_API_VERSION@_la_OBJECTS) $(libgimpcolor_@GIMP_API_VERSION@_la_LIBADD) $(LIBS)
+
+test-color-parser$(EXEEXT): $(test_color_parser_OBJECTS) $(test_color_parser_DEPENDENCIES) $(EXTRA_test_color_parser_DEPENDENCIES) 
+	@rm -f test-color-parser$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(test_color_parser_OBJECTS) $(test_color_parser_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpadaptivesupersample.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpbilinear.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpcairo.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpcmyk.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpcolormanaged.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpcolorprofile.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpcolorspace.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimpcolortransform.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimphsl.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimphsv.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimppixbuf.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimprgb-parse.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gimprgb.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/test-color-parser.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
+install-libgimpcolorincludeHEADERS: $(libgimpcolorinclude_HEADERS)
+	@$(NORMAL_INSTALL)
+	@list='$(libgimpcolorinclude_HEADERS)'; test -n "$(libgimpcolorincludedir)" || list=; \
+	if test -n "$$list"; then \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(libgimpcolorincludedir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(libgimpcolorincludedir)" || exit 1; \
+	fi; \
+	for p in $$list; do \
+	  if test -f "$$p"; then d=; else d="$(srcdir)/"; fi; \
+	  echo "$$d$$p"; \
+	done | $(am__base_list) | \
+	while read files; do \
+	  echo " $(INSTALL_HEADER) $$files '$(DESTDIR)$(libgimpcolorincludedir)'"; \
+	  $(INSTALL_HEADER) $$files "$(DESTDIR)$(libgimpcolorincludedir)" || exit $$?; \
+	done
+
+uninstall-libgimpcolorincludeHEADERS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(libgimpcolorinclude_HEADERS)'; test -n "$(libgimpcolorincludedir)" || list=; \
+	files=`for p in $$list; do echo $$p; done | sed -e 's|^.*/||'`; \
+	dir='$(DESTDIR)$(libgimpcolorincludedir)'; $(am__uninstall_files_from_dir)
+
+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$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
+
+# Recover from deleted '.trs' file; this should ensure that
+# "rm -f foo.log; make foo.trs" re-run 'foo.test', and re-create
+# both 'foo.log' and 'foo.trs'.  Break the recipe in two subshells
+# to avoid problems with "make -n".
+.log.trs:
+	rm -f $< $@
+	$(MAKE) $(AM_MAKEFLAGS) $<
+
+# Leading 'am--fnord' is there to ensure the list of targets does not
+# expand to empty, as could happen e.g. with make check TESTS=''.
+am--fnord $(TEST_LOGS) $(TEST_LOGS:.log=.trs): $(am__force_recheck)
+am--force-recheck:
+	@:
+
+$(TEST_SUITE_LOG): $(TEST_LOGS)
+	@$(am__set_TESTS_bases); \
+	am__f_ok () { test -f "$$1" && test -r "$$1"; }; \
+	redo_bases=`for i in $$bases; do \
+	              am__f_ok $$i.trs && am__f_ok $$i.log || echo $$i; \
+	            done`; \
+	if test -n "$$redo_bases"; then \
+	  redo_logs=`for i in $$redo_bases; do echo $$i.log; done`; \
+	  redo_results=`for i in $$redo_bases; do echo $$i.trs; done`; \
+	  if $(am__make_dryrun); then :; else \
+	    rm -f $$redo_logs && rm -f $$redo_results || exit 1; \
+	  fi; \
+	fi; \
+	if test -n "$$am__remaking_logs"; then \
+	  echo "fatal: making $(TEST_SUITE_LOG): possible infinite" \
+	       "recursion detected" >&2; \
+	elif test -n "$$redo_logs"; then \
+	  am__remaking_logs=yes $(MAKE) $(AM_MAKEFLAGS) $$redo_logs; \
+	fi; \
+	if $(am__make_dryrun); then :; else \
+	  st=0;  \
+	  errmsg="fatal: making $(TEST_SUITE_LOG): failed to create"; \
+	  for i in $$redo_bases; do \
+	    test -f $$i.trs && test -r $$i.trs \
+	      || { echo "$$errmsg $$i.trs" >&2; st=1; }; \
+	    test -f $$i.log && test -r $$i.log \
+	      || { echo "$$errmsg $$i.log" >&2; st=1; }; \
+	  done; \
+	  test $$st -eq 0 || exit 1; \
+	fi
+	@$(am__sh_e_setup); $(am__tty_colors); $(am__set_TESTS_bases); \
+	ws='[ 	]'; \
+	results=`for b in $$bases; do echo $$b.trs; done`; \
+	test -n "$$results" || results=/dev/null; \
+	all=`  grep "^$$ws*:test-result:"           $$results | wc -l`; \
+	pass=` grep "^$$ws*:test-result:$$ws*PASS"  $$results | wc -l`; \
+	fail=` grep "^$$ws*:test-result:$$ws*FAIL"  $$results | wc -l`; \
+	skip=` grep "^$$ws*:test-result:$$ws*SKIP"  $$results | wc -l`; \
+	xfail=`grep "^$$ws*:test-result:$$ws*XFAIL" $$results | wc -l`; \
+	xpass=`grep "^$$ws*:test-result:$$ws*XPASS" $$results | wc -l`; \
+	error=`grep "^$$ws*:test-result:$$ws*ERROR" $$results | wc -l`; \
+	if test `expr $$fail + $$xpass + $$error` -eq 0; then \
+	  success=true; \
+	else \
+	  success=false; \
+	fi; \
+	br='==================='; br=$$br$$br$$br$$br; \
+	result_count () \
+	{ \
+	    if test x"$$1" = x"--maybe-color"; then \
+	      maybe_colorize=yes; \
+	    elif test x"$$1" = x"--no-color"; then \
+	      maybe_colorize=no; \
+	    else \
+	      echo "$@: invalid 'result_count' usage" >&2; exit 4; \
+	    fi; \
+	    shift; \
+	    desc=$$1 count=$$2; \
+	    if test $$maybe_colorize = yes && test $$count -gt 0; then \
+	      color_start=$$3 color_end=$$std; \
+	    else \
+	      color_start= color_end=; \
+	    fi; \
+	    echo "$${color_start}# $$desc $$count$${color_end}"; \
+	}; \
+	create_testsuite_report () \
+	{ \
+	  result_count $$1 "TOTAL:" $$all   "$$brg"; \
+	  result_count $$1 "PASS: " $$pass  "$$grn"; \
+	  result_count $$1 "SKIP: " $$skip  "$$blu"; \
+	  result_count $$1 "XFAIL:" $$xfail "$$lgn"; \
+	  result_count $$1 "FAIL: " $$fail  "$$red"; \
+	  result_count $$1 "XPASS:" $$xpass "$$red"; \
+	  result_count $$1 "ERROR:" $$error "$$mgn"; \
+	}; \
+	{								\
+	  echo "$(PACKAGE_STRING): $(subdir)/$(TEST_SUITE_LOG)" |	\
+	    $(am__rst_title);						\
+	  create_testsuite_report --no-color;				\
+	  echo;								\
+	  echo ".. contents:: :depth: 2";				\
+	  echo;								\
+	  for b in $$bases; do echo $$b; done				\
+	    | $(am__create_global_log);					\
+	} >$(TEST_SUITE_LOG).tmp || exit 1;				\
+	mv $(TEST_SUITE_LOG).tmp $(TEST_SUITE_LOG);			\
+	if $$success; then						\
+	  col="$$grn";							\
+	 else								\
+	  col="$$red";							\
+	  test x"$$VERBOSE" = x || cat $(TEST_SUITE_LOG);		\
+	fi;								\
+	echo "$${col}$$br$${std}"; 					\
+	echo "$${col}Testsuite summary"$(AM_TESTSUITE_SUMMARY_HEADER)"$${std}";	\
+	echo "$${col}$$br$${std}"; 					\
+	create_testsuite_report --maybe-color;				\
+	echo "$$col$$br$$std";						\
+	if $$success; then :; else					\
+	  echo "$${col}See $(subdir)/$(TEST_SUITE_LOG)$${std}";		\
+	  if test -n "$(PACKAGE_BUGREPORT)"; then			\
+	    echo "$${col}Please report to $(PACKAGE_BUGREPORT)$${std}";	\
+	  fi;								\
+	  echo "$$col$$br$$std";					\
+	fi;								\
+	$$success || exit 1
+
+check-TESTS: 
+	@list='$(RECHECK_LOGS)';           test -z "$$list" || rm -f $$list
+	@list='$(RECHECK_LOGS:.log=.trs)'; test -z "$$list" || rm -f $$list
+	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+	@set +e; $(am__set_TESTS_bases); \
+	log_list=`for i in $$bases; do echo $$i.log; done`; \
+	trs_list=`for i in $$bases; do echo $$i.trs; done`; \
+	log_list=`echo $$log_list`; trs_list=`echo $$trs_list`; \
+	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) TEST_LOGS="$$log_list"; \
+	exit $$?;
+recheck: all 
+	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+	@set +e; $(am__set_TESTS_bases); \
+	bases=`for i in $$bases; do echo $$i; done \
+	         | $(am__list_recheck_tests)` || exit 1; \
+	log_list=`for i in $$bases; do echo $$i.log; done`; \
+	log_list=`echo $$log_list`; \
+	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) \
+	        am__force_recheck=am--force-recheck \
+	        TEST_LOGS="$$log_list"; \
+	exit $$?
+test-color-parser.log: test-color-parser$(EXEEXT)
+	@p='test-color-parser$(EXEEXT)'; \
+	b='test-color-parser'; \
+	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+.test.log:
+	@p='$<'; \
+	$(am__set_b); \
+	$(am__check_pre) $(TEST_LOG_DRIVER) --test-name "$$f" \
+	--log-file $$b.log --trs-file $$b.trs \
+	$(am__common_driver_flags) $(AM_TEST_LOG_DRIVER_FLAGS) $(TEST_LOG_DRIVER_FLAGS) -- $(TEST_LOG_COMPILE) \
+	"$$tst" $(AM_TESTS_FD_REDIRECT)
+@am__EXEEXT_TRUE@.test$(EXEEXT).log:
+@am__EXEEXT_TRUE@	@p='$<'; \
+@am__EXEEXT_TRUE@	$(am__set_b); \
+@am__EXEEXT_TRUE@	$(am__check_pre) $(TEST_LOG_DRIVER) --test-name "$$f" \
+@am__EXEEXT_TRUE@	--log-file $$b.log --trs-file $$b.trs \
+@am__EXEEXT_TRUE@	$(am__common_driver_flags) $(AM_TEST_LOG_DRIVER_FLAGS) $(TEST_LOG_DRIVER_FLAGS) -- $(TEST_LOG_COMPILE) \
+@am__EXEEXT_TRUE@	"$$tst" $(AM_TESTS_FD_REDIRECT)
+
+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
+	$(MAKE) $(AM_MAKEFLAGS) check-TESTS
+check: check-am
+all-am: Makefile $(LTLIBRARIES) $(DATA) $(HEADERS)
+installdirs:
+	for dir in "$(DESTDIR)$(libdir)" "$(DESTDIR)$(libgimpcolorincludedir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+	-test -z "$(TEST_LOGS)" || rm -f $(TEST_LOGS)
+	-test -z "$(TEST_LOGS:.log=.trs)" || rm -f $(TEST_LOGS:.log=.trs)
+	-test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
+
+clean-generic:
+	-test -z "$(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 $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libLTLIBRARIES clean-libtool \
+	mostlyclean-am
+
+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/gimpadaptivesupersample.Plo
+	-rm -f ./$(DEPDIR)/gimpbilinear.Plo
+	-rm -f ./$(DEPDIR)/gimpcairo.Plo
+	-rm -f ./$(DEPDIR)/gimpcmyk.Plo
+	-rm -f ./$(DEPDIR)/gimpcolormanaged.Plo
+	-rm -f ./$(DEPDIR)/gimpcolorprofile.Plo
+	-rm -f ./$(DEPDIR)/gimpcolorspace.Plo
+	-rm -f ./$(DEPDIR)/gimpcolortransform.Plo
+	-rm -f ./$(DEPDIR)/gimphsl.Plo
+	-rm -f ./$(DEPDIR)/gimphsv.Plo
+	-rm -f ./$(DEPDIR)/gimppixbuf.Plo
+	-rm -f ./$(DEPDIR)/gimprgb-parse.Plo
+	-rm -f ./$(DEPDIR)/gimprgb.Plo
+	-rm -f ./$(DEPDIR)/test-color-parser.Po
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-data-local install-libgimpcolorincludeHEADERS
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+install-ps-am:
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+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+		-rm -f ./$(DEPDIR)/gimpadaptivesupersample.Plo
+	-rm -f ./$(DEPDIR)/gimpbilinear.Plo
+	-rm -f ./$(DEPDIR)/gimpcairo.Plo
+	-rm -f ./$(DEPDIR)/gimpcmyk.Plo
+	-rm -f ./$(DEPDIR)/gimpcolormanaged.Plo
+	-rm -f ./$(DEPDIR)/gimpcolorprofile.Plo
+	-rm -f ./$(DEPDIR)/gimpcolorspace.Plo
+	-rm -f ./$(DEPDIR)/gimpcolortransform.Plo
+	-rm -f ./$(DEPDIR)/gimphsl.Plo
+	-rm -f ./$(DEPDIR)/gimphsv.Plo
+	-rm -f ./$(DEPDIR)/gimppixbuf.Plo
+	-rm -f ./$(DEPDIR)/gimprgb-parse.Plo
+	-rm -f ./$(DEPDIR)/gimprgb.Plo
+	-rm -f ./$(DEPDIR)/test-color-parser.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:
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+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-libLTLIBRARIES \
+	uninstall-libgimpcolorincludeHEADERS uninstall-local
+
+.MAKE: check-am install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-TESTS \
+	check-am clean clean-generic clean-libLTLIBRARIES \
+	clean-libtool cscopelist-am ctags ctags-am distclean \
+	distclean-compile distclean-generic distclean-libtool \
+	distclean-tags distdir dvi dvi-am html html-am info info-am \
+	install install-am install-data install-data-am \
+	install-data-local install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-libLTLIBRARIES \
+	install-libgimpcolorincludeHEADERS 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 \
+	recheck tags tags-am uninstall uninstall-am \
+	uninstall-libLTLIBRARIES uninstall-libgimpcolorincludeHEADERS \
+	uninstall-local
+
+.PRECIOUS: Makefile
+
+
+@OS_WIN32_TRUE@install-libtool-import-lib:
+@OS_WIN32_TRUE@	$(INSTALL) .libs/libgimpcolor-$(GIMP_API_VERSION).dll.a $(DESTDIR)$(libdir)
+@OS_WIN32_TRUE@	$(INSTALL) $(srcdir)/gimpcolor.def $(DESTDIR)$(libdir)
+
+@OS_WIN32_TRUE@uninstall-libtool-import-lib:
+@OS_WIN32_TRUE@	-rm $(DESTDIR)$(libdir)/libgimpcolor-$(GIMP_API_VERSION).dll.a
+@OS_WIN32_TRUE@	-rm $(DESTDIR)$(libdir)/gimpcolor.def
+@OS_WIN32_FALSE@install-libtool-import-lib:
+@OS_WIN32_FALSE@uninstall-libtool-import-lib:
+
+@MS_LIB_AVAILABLE_TRUE@install-ms-lib:
+@MS_LIB_AVAILABLE_TRUE@	$(INSTALL) gimpcolor-$(GIMP_API_VERSION).lib $(DESTDIR)$(libdir)
+
+@MS_LIB_AVAILABLE_TRUE@uninstall-ms-lib:
+@MS_LIB_AVAILABLE_TRUE@	-rm $(DESTDIR)$(libdir)/gimpcolor-$(GIMP_API_VERSION).lib
+
+@MS_LIB_AVAILABLE_TRUE@gimpcolor-@GIMP_API_VERSION@.lib: gimpcolor.def
+@MS_LIB_AVAILABLE_TRUE@	lib -name:libgimpcolor-$(GIMP_API_VERSION)-@LT_CURRENT_MINUS_AGE@.dll -def:gimpcolor.def -out:$@
+
+@MS_LIB_AVAILABLE_FALSE@install-ms-lib:
+@MS_LIB_AVAILABLE_FALSE@uninstall-ms-lib:
+
+install-data-local: install-ms-lib install-libtool-import-lib
+
+uninstall-local: uninstall-ms-lib uninstall-libtool-import-lib
+
+# 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/libgimpcolor/gimpadaptivesupersample.c b/libgimpcolor/gimpadaptivesupersample.c
new file mode 100644
index 0000000..3b9bedc
--- /dev/null
+++ b/libgimpcolor/gimpadaptivesupersample.c
@@ -0,0 +1,394 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <glib-object.h>
+
+#include "libgimpmath/gimpmath.h"
+
+#include "gimpcolortypes.h"
+
+#include "gimpadaptivesupersample.h"
+#include "gimprgb.h"
+
+
+/**
+ * SECTION: gimpadaptivesupersample
+ * @title: GimpAdaptiveSupersample
+ * @short_description: Functions to perform adaptive supersampling on
+ *                     an area.
+ *
+ * Functions to perform adaptive supersampling on an area.
+ **/
+
+
+/*********************************************************************/
+/* Sumpersampling code (Quartic)                                     */
+/* This code is *largely* based on the sources for POV-Ray 3.0. I am */
+/* grateful to the POV-Team for such a great program and for making  */
+/* their sources available.  All comments / bug reports /            */
+/* etc. regarding this code should be addressed to me, not to the    */
+/* POV-Ray team.  Any bugs are my responsibility, not theirs.        */
+/*********************************************************************/
+
+
+typedef struct _GimpSampleType GimpSampleType;
+
+struct _GimpSampleType
+{
+  guchar  ready;
+  GimpRGB color;
+};
+
+
+static gulong
+gimp_render_sub_pixel (gint             max_depth,
+                       gint             depth,
+                       GimpSampleType **block,
+                       gint             x,
+                       gint             y,
+                       gint             x1,
+                       gint             y1,
+                       gint             x3,
+                       gint             y3,
+                       gdouble          threshold,
+                       gint             sub_pixel_size,
+                       GimpRGB         *color,
+                       GimpRenderFunc   render_func,
+                       gpointer         render_data)
+{
+  gint     x2, y2;          /* Coords of center sample */
+  gdouble  dx1, dy1;        /* Delta to upper left sample */
+  gdouble  dx3, dy3;        /* Delta to lower right sample */
+  GimpRGB  c[4];            /* Sample colors */
+  gulong   num_samples = 0;
+  gint     cnt;
+
+  g_return_val_if_fail (render_func != NULL, 0);
+
+  /* Get offsets for corners */
+
+  dx1 = (gdouble) (x1 - sub_pixel_size / 2) / sub_pixel_size;
+  dx3 = (gdouble) (x3 - sub_pixel_size / 2) / sub_pixel_size;
+
+  dy1 = (gdouble) (y1 - sub_pixel_size / 2) / sub_pixel_size;
+  dy3 = (gdouble) (y3 - sub_pixel_size / 2) / sub_pixel_size;
+
+  /* Render upper left sample */
+
+  if (! block[y1][x1].ready)
+    {
+      num_samples++;
+
+      render_func (x + dx1, y + dy1, &c[0], render_data);
+
+      block[y1][x1].ready = TRUE;
+      block[y1][x1].color = c[0];
+    }
+  else
+    {
+      c[0] = block[y1][x1].color;
+    }
+
+  /* Render upper right sample */
+
+  if (! block[y1][x3].ready)
+    {
+      num_samples++;
+
+      render_func (x + dx3, y + dy1, &c[1], render_data);
+
+      block[y1][x3].ready = TRUE;
+      block[y1][x3].color = c[1];
+    }
+  else
+    {
+      c[1] = block[y1][x3].color;
+    }
+
+  /* Render lower left sample */
+
+  if (! block[y3][x1].ready)
+    {
+      num_samples++;
+
+      render_func (x + dx1, y + dy3, &c[2], render_data);
+
+      block[y3][x1].ready = TRUE;
+      block[y3][x1].color = c[2];
+    }
+  else
+    {
+      c[2] = block[y3][x1].color;
+    }
+
+  /* Render lower right sample */
+
+  if (! block[y3][x3].ready)
+    {
+      num_samples++;
+
+      render_func (x + dx3, y + dy3, &c[3], render_data);
+
+      block[y3][x3].ready = TRUE;
+      block[y3][x3].color = c[3];
+    }
+  else
+    {
+      c[3] = block[y3][x3].color;
+    }
+
+  /* Check for supersampling */
+
+  if (depth <= max_depth)
+    {
+      /* Check whether we have to supersample */
+
+      if ((gimp_rgba_distance (&c[0], &c[1]) >= threshold) ||
+          (gimp_rgba_distance (&c[0], &c[2]) >= threshold) ||
+          (gimp_rgba_distance (&c[0], &c[3]) >= threshold) ||
+          (gimp_rgba_distance (&c[1], &c[2]) >= threshold) ||
+          (gimp_rgba_distance (&c[1], &c[3]) >= threshold) ||
+          (gimp_rgba_distance (&c[2], &c[3]) >= threshold))
+        {
+          /* Calc coordinates of center subsample */
+
+          x2 = (x1 + x3) / 2;
+          y2 = (y1 + y3) / 2;
+
+          /* Render sub-blocks */
+
+          num_samples += gimp_render_sub_pixel (max_depth, depth + 1, block,
+                                                x, y, x1, y1, x2, y2,
+                                                threshold, sub_pixel_size,
+                                                &c[0],
+                                                render_func, render_data);
+
+          num_samples += gimp_render_sub_pixel (max_depth, depth + 1, block,
+                                                x, y, x2, y1, x3, y2,
+                                                threshold, sub_pixel_size,
+                                                &c[1],
+                                                render_func, render_data);
+
+          num_samples += gimp_render_sub_pixel (max_depth, depth + 1, block,
+                                                x, y, x1, y2, x2, y3,
+                                                threshold, sub_pixel_size,
+                                                &c[2],
+                                                render_func, render_data);
+
+          num_samples += gimp_render_sub_pixel (max_depth, depth + 1, block,
+                                                x, y, x2, y2, x3, y3,
+                                                threshold, sub_pixel_size,
+                                                &c[3],
+                                                render_func, render_data);
+        }
+    }
+
+  if (c[0].a == 0.0 || c[1].a == 0.0 || c[2].a == 0.0 || c[3].a == 0.0)
+    {
+      GimpRGB tmpcol;
+      gdouble weight;
+
+      gimp_rgb_set (&tmpcol, 0.0, 0.0, 0.0);
+
+      weight = 2.0;
+
+      for (cnt = 0; cnt < 4; cnt++)
+        {
+          if (c[cnt].a != 0.0)
+            {
+              tmpcol.r += c[cnt].r;
+              tmpcol.g += c[cnt].g;
+              tmpcol.b += c[cnt].b;
+
+              weight /= 2.0;
+            }
+        }
+
+      color->r = weight * tmpcol.r;
+      color->g = weight * tmpcol.g;
+      color->b = weight * tmpcol.b;
+    }
+  else
+    {
+      color->r = 0.25 * (c[0].r + c[1].r + c[2].r + c[3].r);
+      color->g = 0.25 * (c[0].g + c[1].g + c[2].g + c[3].g);
+      color->b = 0.25 * (c[0].b + c[1].b + c[2].b + c[3].b);
+    }
+
+  color->a = 0.25 * (c[0].a + c[1].a + c[2].a + c[3].a);
+
+  return num_samples;
+}
+
+gulong
+gimp_adaptive_supersample_area (gint              x1,
+                                gint              y1,
+                                gint              x2,
+                                gint              y2,
+                                gint              max_depth,
+                                gdouble           threshold,
+                                GimpRenderFunc    render_func,
+                                gpointer          render_data,
+                                GimpPutPixelFunc  put_pixel_func,
+                                gpointer          put_pixel_data,
+                                GimpProgressFunc  progress_func,
+                                gpointer          progress_data)
+{
+  gint             x, y, width;                 /* Counters, width of region */
+  gint             xt, xtt, yt;                 /* Temporary counters */
+  gint             sub_pixel_size;              /* Number of samples per pixel (1D) */
+  GimpRGB          color;                       /* Rendered pixel's color */
+  GimpSampleType   tmp_sample;                  /* For swapping samples */
+  GimpSampleType  *top_row, *bot_row, *tmp_row; /* Sample rows */
+  GimpSampleType **block;                       /* Sample block matrix */
+  gulong           num_samples;
+
+  g_return_val_if_fail (render_func != NULL, 0);
+  g_return_val_if_fail (put_pixel_func != NULL, 0);
+
+  /* Initialize color */
+
+  gimp_rgba_set (&color, 0.0, 0.0, 0.0, 0.0);
+
+  /* Calculate sub-pixel size */
+
+  sub_pixel_size = 1 << max_depth;
+
+  /* Create row arrays */
+
+  width = x2 - x1 + 1;
+
+  top_row = gegl_scratch_new (GimpSampleType, sub_pixel_size * width + 1);
+  bot_row = gegl_scratch_new (GimpSampleType, sub_pixel_size * width + 1);
+
+  for (x = 0; x < (sub_pixel_size * width + 1); x++)
+    {
+      top_row[x].ready = FALSE;
+
+      gimp_rgba_set (&top_row[x].color, 0.0, 0.0, 0.0, 0.0);
+
+      bot_row[x].ready = FALSE;
+
+      gimp_rgba_set (&bot_row[x].color, 0.0, 0.0, 0.0, 0.0);
+    }
+
+  /* Allocate block matrix */
+
+  block = gegl_scratch_new (GimpSampleType *, sub_pixel_size + 1); /* Rows */
+
+  for (y = 0; y < (sub_pixel_size + 1); y++)
+    {
+      block[y] = gegl_scratch_new (GimpSampleType, sub_pixel_size + 1); /* Columns */
+
+      for (x = 0; x < (sub_pixel_size + 1); x++)
+        {
+          block[y][x].ready = FALSE;
+
+          gimp_rgba_set (&block[y][x].color, 0.0, 0.0, 0.0, 0.0);
+        }
+    }
+
+  /* Render region */
+
+  num_samples = 0;
+
+  for (y = y1; y <= y2; y++)
+    {
+      /* Clear the bottom row */
+
+      for (xt = 0; xt < (sub_pixel_size * width + 1); xt++)
+        bot_row[xt].ready = FALSE;
+
+      /* Clear first column */
+
+      for (yt = 0; yt < (sub_pixel_size + 1); yt++)
+        block[yt][0].ready = FALSE;
+
+      /* Render row */
+
+      for (x = x1; x <= x2; x++)
+        {
+          /* Initialize block by clearing all but first row/column */
+
+          for (yt = 1; yt < (sub_pixel_size + 1); yt++)
+            for (xt = 1; xt < (sub_pixel_size + 1); xt++)
+              block[yt][xt].ready = FALSE;
+
+          /* Copy samples from top row to block */
+
+          for (xtt = 0, xt = (x - x1) * sub_pixel_size;
+               xtt < (sub_pixel_size + 1);
+               xtt++, xt++)
+            block[0][xtt] = top_row[xt];
+
+          /* Render pixel on (x, y) */
+
+          num_samples += gimp_render_sub_pixel (max_depth, 1, block, x, y, 0, 0,
+                                                sub_pixel_size, sub_pixel_size,
+                                                threshold, sub_pixel_size,
+                                                &color,
+                                                render_func, render_data);
+
+          if (put_pixel_func)
+            (* put_pixel_func) (x, y, &color, put_pixel_data);
+
+          /* Copy block information to rows */
+
+          top_row[(x - x1 + 1) * sub_pixel_size] = block[0][sub_pixel_size];
+
+          for (xtt = 0, xt = (x - x1) * sub_pixel_size;
+               xtt < (sub_pixel_size + 1);
+               xtt++, xt++)
+            bot_row[xt] = block[sub_pixel_size][xtt];
+
+          /* Swap first and last columns */
+
+          for (yt = 0; yt < (sub_pixel_size + 1); yt++)
+            {
+              tmp_sample                = block[yt][0];
+              block[yt][0]              = block[yt][sub_pixel_size];
+              block[yt][sub_pixel_size] = tmp_sample;
+            }
+        }
+
+      /* Swap rows */
+
+      tmp_row = top_row;
+      top_row = bot_row;
+      bot_row = tmp_row;
+
+      /* Call progress display function (if any) */
+
+      if (progress_func != NULL)
+        (* progress_func) (y1, y2, y, progress_data);
+    }
+
+  /* Free memory */
+
+  for (y = 0; y < (sub_pixel_size + 1); y++)
+    gegl_scratch_free (block[y]);
+
+  gegl_scratch_free (block);
+  gegl_scratch_free (top_row);
+  gegl_scratch_free (bot_row);
+
+  return num_samples;
+}
diff --git a/libgimpcolor/gimpadaptivesupersample.h b/libgimpcolor/gimpadaptivesupersample.h
new file mode 100644
index 0000000..fdee486
--- /dev/null
+++ b/libgimpcolor/gimpadaptivesupersample.h
@@ -0,0 +1,50 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_COLOR_H_INSIDE__) && !defined (GIMP_COLOR_COMPILATION)
+#error "Only <libgimpcolor/gimpcolor.h> can be included directly."
+#endif
+
+#ifndef __GIMP_ADAPTIVE_SUPERSAMPLE_H__
+#define __GIMP_ADAPTIVE_SUPERSAMPLE_H__
+
+G_BEGIN_DECLS
+
+/* For information look into the C source or the html documentation */
+
+
+/*  adaptive supersampling function taken from LibGCK  */
+
+
+gulong   gimp_adaptive_supersample_area (gint              x1,
+                                         gint              y1,
+                                         gint              x2,
+                                         gint              y2,
+                                         gint              max_depth,
+                                         gdouble           threshold,
+                                         GimpRenderFunc    render_func,
+                                         gpointer          render_data,
+                                         GimpPutPixelFunc  put_pixel_func,
+                                         gpointer          put_pixel_data,
+                                         GimpProgressFunc  progress_func,
+                                         gpointer          progress_data);
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_ADAPTIVE_SUPERSAMPLE_H__ */
diff --git a/libgimpcolor/gimpbilinear.c b/libgimpcolor/gimpbilinear.c
new file mode 100644
index 0000000..1de06b6
--- /dev/null
+++ b/libgimpcolor/gimpbilinear.c
@@ -0,0 +1,313 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <glib-object.h>
+
+#include "libgimpmath/gimpmath.h"
+
+#include "gimpcolortypes.h"
+
+#include "gimpbilinear.h"
+
+
+/**
+ * SECTION: gimpbilinear
+ * @title: GimpBilinear
+ * @short_description: Utility functions for bilinear interpolation.
+ *
+ * Utility functions for bilinear interpolation.
+ **/
+
+
+gdouble
+gimp_bilinear (gdouble  x,
+               gdouble  y,
+               gdouble *values)
+{
+  gdouble m0, m1;
+
+  g_return_val_if_fail (values != NULL, 0.0);
+
+  x = fmod (x, 1.0);
+  y = fmod (y, 1.0);
+
+  if (x < 0.0)
+    x += 1.0;
+  if (y < 0.0)
+    y += 1.0;
+
+  m0 = (1.0 - x) * values[0] + x * values[1];
+  m1 = (1.0 - x) * values[2] + x * values[3];
+
+  return (1.0 - y) * m0 + y * m1;
+}
+
+guchar
+gimp_bilinear_8 (gdouble x,
+                 gdouble y,
+                 guchar *values)
+{
+  gdouble m0, m1;
+
+  g_return_val_if_fail (values != NULL, 0);
+
+  x = fmod (x, 1.0);
+  y = fmod (y, 1.0);
+
+  if (x < 0.0)
+    x += 1.0;
+  if (y < 0.0)
+    y += 1.0;
+
+  m0 = (1.0 - x) * values[0] + x * values[1];
+  m1 = (1.0 - x) * values[2] + x * values[3];
+
+  return (guchar) ((1.0 - y) * m0 + y * m1);
+}
+
+guint16
+gimp_bilinear_16 (gdouble  x,
+                  gdouble  y,
+                  guint16 *values)
+{
+  gdouble m0, m1;
+
+  g_return_val_if_fail (values != NULL, 0);
+
+  x = fmod (x, 1.0);
+  y = fmod (y, 1.0);
+
+  if (x < 0.0)
+    x += 1.0;
+  if (y < 0.0)
+    y += 1.0;
+
+  m0 = (1.0 - x) * values[0] + x * values[1];
+  m1 = (1.0 - x) * values[2] + x * values[3];
+
+  return (guint16) ((1.0 - y) * m0 + y * m1);
+}
+
+guint32
+gimp_bilinear_32 (gdouble  x,
+                  gdouble  y,
+                  guint32 *values)
+{
+  gdouble m0, m1;
+
+  g_return_val_if_fail (values != NULL, 0);
+
+  x = fmod (x, 1.0);
+  y = fmod (y, 1.0);
+
+  if (x < 0.0)
+    x += 1.0;
+  if (y < 0.0)
+    y += 1.0;
+
+  m0 = (1.0 - x) * values[0] + x * values[1];
+  m1 = (1.0 - x) * values[2] + x * values[3];
+
+  return (guint32) ((1.0 - y) * m0 + y * m1);
+}
+
+GimpRGB
+gimp_bilinear_rgb (gdouble  x,
+                   gdouble  y,
+                   GimpRGB *values)
+{
+  gdouble m0, m1;
+  gdouble ix, iy;
+  GimpRGB v = { 0, };
+
+  g_return_val_if_fail (values != NULL, v);
+
+  x = fmod(x, 1.0);
+  y = fmod(y, 1.0);
+
+  if (x < 0)
+    x += 1.0;
+  if (y < 0)
+    y += 1.0;
+
+  ix = 1.0 - x;
+  iy = 1.0 - y;
+
+  /* Red */
+
+  m0 = ix * values[0].r + x * values[1].r;
+  m1 = ix * values[2].r + x * values[3].r;
+
+  v.r = iy * m0 + y * m1;
+
+  /* Green */
+
+  m0 = ix * values[0].g + x * values[1].g;
+  m1 = ix * values[2].g + x * values[3].g;
+
+  v.g = iy * m0 + y * m1;
+
+  /* Blue */
+
+  m0 = ix * values[0].b + x * values[1].b;
+  m1 = ix * values[2].b + x * values[3].b;
+
+  v.b = iy * m0 + y * m1;
+
+  return v;
+}
+
+GimpRGB
+gimp_bilinear_rgba (gdouble  x,
+                    gdouble  y,
+                    GimpRGB *values)
+{
+  gdouble m0, m1;
+  gdouble ix, iy;
+  gdouble a0, a1, a2, a3, alpha;
+  GimpRGB v = { 0, };
+
+  g_return_val_if_fail (values != NULL, v);
+
+  x = fmod (x, 1.0);
+  y = fmod (y, 1.0);
+
+  if (x < 0)
+    x += 1.0;
+  if (y < 0)
+    y += 1.0;
+
+  ix = 1.0 - x;
+  iy = 1.0 - y;
+
+  a0 = values[0].a;
+  a1 = values[1].a;
+  a2 = values[2].a;
+  a3 = values[3].a;
+
+  /* Alpha */
+
+  m0 = ix * a0 + x * a1;
+  m1 = ix * a2 + x * a3;
+
+  alpha = v.a = iy * m0 + y * m1;
+
+  if (alpha > 0)
+    {
+      /* Red */
+
+      m0 = ix * a0 * values[0].r + x * a1 * values[1].r;
+      m1 = ix * a2 * values[2].r + x * a3 * values[3].r;
+
+      v.r = (iy * m0 + y * m1)/alpha;
+
+      /* Green */
+
+      m0 = ix * a0 * values[0].g + x * a1 * values[1].g;
+      m1 = ix * a2 * values[2].g + x * a3 * values[3].g;
+
+      v.g = (iy * m0 + y * m1)/alpha;
+
+      /* Blue */
+
+      m0 = ix * a0 * values[0].b + x * a1 * values[1].b;
+      m1 = ix * a2 * values[2].b + x * a3 * values[3].b;
+
+      v.b = (iy * m0 + y * m1)/alpha;
+    }
+
+  return v;
+}
+
+/**
+ * gimp_bilinear_pixels_8:
+ * @dest: Pixel, where interpolation result is to be stored.
+ * @x: x-coordinate (0.0 to 1.0).
+ * @y: y-coordinate (0.0 to 1.0).
+ * @bpp: Bytes per pixel.  @dest and each @values item is an array of
+ *    @bpp bytes.
+ * @has_alpha: %TRUE if the last channel is an alpha channel.
+ * @values: Array of four pointers to pixels.
+ *
+ * Computes bilinear interpolation of four pixels.
+ *
+ * When @has_alpha is %FALSE, it's identical to gimp_bilinear_8() on
+ * each channel separately.  When @has_alpha is %TRUE, it handles
+ * alpha channel correctly.
+ *
+ * The pixels in @values correspond to corner x, y coordinates in the
+ * following order: [0,0], [1,0], [0,1], [1,1].
+ **/
+void
+gimp_bilinear_pixels_8 (guchar    *dest,
+                        gdouble    x,
+                        gdouble    y,
+                        guint      bpp,
+                        gboolean   has_alpha,
+                        guchar   **values)
+{
+  guint i;
+
+  g_return_if_fail (dest != NULL);
+  g_return_if_fail (values != NULL);
+
+  x = fmod (x, 1.0);
+  y = fmod (y, 1.0);
+
+  if (x < 0.0)
+    x += 1.0;
+  if (y < 0.0)
+    y += 1.0;
+
+  if (has_alpha)
+    {
+      guint   ai     = bpp - 1;
+      gdouble alpha0 = values[0][ai];
+      gdouble alpha1 = values[1][ai];
+      gdouble alpha2 = values[2][ai];
+      gdouble alpha3 = values[3][ai];
+      gdouble alpha  = ((1.0 - y) * ((1.0 - x) * alpha0 + x * alpha1)
+                        + y * ((1.0 - x) * alpha2 + x * alpha3));
+
+      dest[ai] = (guchar) alpha;
+      if (dest[ai])
+        {
+          for (i = 0; i < ai; i++)
+            {
+              gdouble m0 = ((1.0 - x) * values[0][i] * alpha0
+                            + x * values[1][i] * alpha1);
+              gdouble m1 = ((1.0 - x) * values[2][i] * alpha2
+                            + x * values[3][i] * alpha3);
+
+              dest[i] = (guchar) (((1.0 - y) * m0 + y * m1) / alpha);
+            }
+        }
+    }
+  else
+    {
+      for (i = 0; i < bpp; i++)
+        {
+          gdouble m0 = (1.0 - x) * values[0][i] + x * values[1][i];
+          gdouble m1 = (1.0 - x) * values[2][i] + x * values[3][i];
+
+          dest[i] = (guchar) ((1.0 - y) * m0 + y * m1);
+        }
+    }
+}
diff --git a/libgimpcolor/gimpbilinear.h b/libgimpcolor/gimpbilinear.h
new file mode 100644
index 0000000..d56007c
--- /dev/null
+++ b/libgimpcolor/gimpbilinear.h
@@ -0,0 +1,63 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_COLOR_H_INSIDE__) && !defined (GIMP_COLOR_COMPILATION)
+#error "Only <libgimpcolor/gimpcolor.h> can be included directly."
+#endif
+
+#ifndef __GIMP_BILINEAR_H__
+#define __GIMP_BILINEAR_H__
+
+G_BEGIN_DECLS
+
+/* For information look into the C source or the html documentation */
+
+
+/*  bilinear interpolation functions taken from LibGCK  */
+
+
+gdouble   gimp_bilinear          (gdouble    x,
+                                  gdouble    y,
+                                  gdouble   *values);
+guchar    gimp_bilinear_8        (gdouble    x,
+                                  gdouble    y,
+                                  guchar    *values);
+guint16   gimp_bilinear_16       (gdouble    x,
+                                  gdouble    y,
+                                  guint16   *values);
+guint32   gimp_bilinear_32       (gdouble    x,
+                                  gdouble    y,
+                                  guint32   *values);
+GimpRGB   gimp_bilinear_rgb      (gdouble    x,
+                                  gdouble    y,
+                                  GimpRGB   *values);
+GimpRGB   gimp_bilinear_rgba     (gdouble    x,
+                                  gdouble    y,
+                                  GimpRGB   *values);
+
+GIMP_DEPRECATED
+void      gimp_bilinear_pixels_8 (guchar    *dest,
+                                  gdouble    x,
+                                  gdouble    y,
+                                  guint      bpp,
+                                  gboolean   has_alpha,
+                                  guchar   **values);
+
+G_END_DECLS
+
+#endif  /* __GIMP_BILINEAR_H__ */
diff --git a/libgimpcolor/gimpcairo.c b/libgimpcolor/gimpcairo.c
new file mode 100644
index 0000000..e1e57d9
--- /dev/null
+++ b/libgimpcolor/gimpcairo.c
@@ -0,0 +1,210 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpcairo.c
+ * Copyright (C) 2007      Sven Neumann <sven@gimp.org>
+ *               2010-2012 Michael Natterer <mitch@gimp.org>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <cairo.h>
+#include <gio/gio.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "gimpcolortypes.h"
+
+#include "gimpcairo.h"
+
+
+/**
+ * SECTION: gimpcairo
+ * @title: GimpCairo
+ * @short_description: Color utility functions for cairo
+ *
+ * Utility functions that make cairo easier to use with GIMP color
+ * data types.
+ **/
+
+
+/**
+ * gimp_cairo_set_source_rgb:
+ * @cr:    Cairo context
+ * @color: GimpRGB color
+ *
+ * Sets the source pattern within @cr to the solid opaque color
+ * described by @color.
+ *
+ * This function calls cairo_set_source_rgb() for you.
+ *
+ * Since: 2.6
+ **/
+void
+gimp_cairo_set_source_rgb (cairo_t       *cr,
+                           const GimpRGB *color)
+{
+  cairo_set_source_rgb (cr, color->r, color->g, color->b);
+}
+
+/**
+ * gimp_cairo_set_source_rgba:
+ * @cr:    Cairo context
+ * @color: GimpRGB color
+ *
+ * Sets the source pattern within @cr to the solid translucent color
+ * described by @color.
+ *
+ * This function calls cairo_set_source_rgba() for you.
+ *
+ * Since: 2.6
+ **/
+void
+gimp_cairo_set_source_rgba (cairo_t       *cr,
+                            const GimpRGB *color)
+{
+  cairo_set_source_rgba (cr, color->r, color->g, color->b, color->a);
+}
+
+/**
+ * gimp_cairo_checkerboard_create:
+ * @cr:    Cairo context
+ * @size:  check size
+ * @light: light check color or %NULL to use the default light gray
+ * @dark:  dark check color or %NULL to use the default dark gray
+ *
+ * Create a repeating checkerboard pattern.
+ *
+ * Return value: a new Cairo pattern that can be used as a source on @cr.
+ *
+ * Since: 2.6
+ **/
+cairo_pattern_t *
+gimp_cairo_checkerboard_create (cairo_t       *cr,
+                                gint           size,
+                                const GimpRGB *light,
+                                const GimpRGB *dark)
+{
+  cairo_t         *context;
+  cairo_surface_t *surface;
+  cairo_pattern_t *pattern;
+
+  g_return_val_if_fail (cr != NULL, NULL);
+  g_return_val_if_fail (size > 0, NULL);
+
+  surface = cairo_surface_create_similar (cairo_get_target (cr),
+                                          CAIRO_CONTENT_COLOR,
+                                          2 * size, 2 * size);
+  context = cairo_create (surface);
+
+  if (light)
+    gimp_cairo_set_source_rgb (context, light);
+  else
+    cairo_set_source_rgb (context,
+                          GIMP_CHECK_LIGHT, GIMP_CHECK_LIGHT, GIMP_CHECK_LIGHT);
+
+  cairo_rectangle (context, 0,    0,    size, size);
+  cairo_rectangle (context, size, size, size, size);
+  cairo_fill (context);
+
+  if (dark)
+    gimp_cairo_set_source_rgb (context, dark);
+  else
+    cairo_set_source_rgb (context,
+                          GIMP_CHECK_DARK, GIMP_CHECK_DARK, GIMP_CHECK_DARK);
+
+  cairo_rectangle (context, 0,    size, size, size);
+  cairo_rectangle (context, size, 0,    size, size);
+  cairo_fill (context);
+
+  cairo_destroy (context);
+
+  pattern = cairo_pattern_create_for_surface (surface);
+  cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
+
+  cairo_surface_destroy (surface);
+
+  return pattern;
+}
+
+/**
+ * gimp_cairo_surface_get_format:
+ * @surface: a Cairo surface
+ *
+ * This function returns a #Babl format that corresponds to @surface's
+ * pixel format.
+ *
+ * Return value: the #Babl format of @surface.
+ *
+ * Since: 2.10
+ **/
+const Babl *
+gimp_cairo_surface_get_format (cairo_surface_t *surface)
+{
+  g_return_val_if_fail (surface != NULL, NULL);
+  g_return_val_if_fail (cairo_surface_get_type (surface) ==
+                        CAIRO_SURFACE_TYPE_IMAGE, NULL);
+
+  switch (cairo_image_surface_get_format (surface))
+    {
+    case CAIRO_FORMAT_RGB24:  return babl_format ("cairo-RGB24");
+    case CAIRO_FORMAT_ARGB32: return babl_format ("cairo-ARGB32");
+    case CAIRO_FORMAT_A8:     return babl_format ("cairo-A8");
+
+    default:
+      break;
+    }
+
+  g_return_val_if_reached (NULL);
+}
+
+/**
+ * gimp_cairo_surface_create_buffer:
+ * @surface: a Cairo surface
+ *
+ * This function returns a #GeglBuffer which wraps @surface's pixels.
+ * It must only be called on image surfaces, calling it on other surface
+ * types is an error.
+ *
+ * Return value: a #GeglBuffer
+ *
+ * Since: 2.10
+ **/
+GeglBuffer *
+gimp_cairo_surface_create_buffer (cairo_surface_t *surface)
+{
+  const Babl *format;
+  gint        width;
+  gint        height;
+
+  g_return_val_if_fail (surface != NULL, NULL);
+  g_return_val_if_fail (cairo_surface_get_type (surface) ==
+                        CAIRO_SURFACE_TYPE_IMAGE, NULL);
+
+  format = gimp_cairo_surface_get_format  (surface);
+  width  = cairo_image_surface_get_width  (surface);
+  height = cairo_image_surface_get_height (surface);
+
+  return
+    gegl_buffer_linear_new_from_data (cairo_image_surface_get_data (surface),
+                                      format,
+                                      GEGL_RECTANGLE (0, 0, width, height),
+                                      cairo_image_surface_get_stride (surface),
+                                      (GDestroyNotify) cairo_surface_destroy,
+                                      cairo_surface_reference (surface));
+}
diff --git a/libgimpcolor/gimpcairo.h b/libgimpcolor/gimpcairo.h
new file mode 100644
index 0000000..d96e963
--- /dev/null
+++ b/libgimpcolor/gimpcairo.h
@@ -0,0 +1,159 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpcairo.h
+ * Copyright (C) 2007      Sven Neumann <sven@gimp.org>
+ *               2010-2012 Michael Natterer <mitch@gimp.org>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_CAIRO_H__
+#define __GIMP_CAIRO_H__
+
+
+void              gimp_cairo_set_source_rgb        (cairo_t         *cr,
+                                                    const GimpRGB   *color);
+void              gimp_cairo_set_source_rgba       (cairo_t         *cr,
+                                                    const GimpRGB   *color);
+
+cairo_pattern_t * gimp_cairo_checkerboard_create   (cairo_t         *cr,
+                                                    gint             size,
+                                                    const GimpRGB   *light,
+                                                    const GimpRGB   *dark);
+
+const Babl      * gimp_cairo_surface_get_format    (cairo_surface_t *surface);
+GeglBuffer      * gimp_cairo_surface_create_buffer (cairo_surface_t *surface);
+
+
+/*  some useful macros for writing directly to a Cairo surface  */
+
+/**
+ * GIMP_CAIRO_RGB24_SET_PIXEL:
+ * @d: pointer to the destination buffer
+ * @r: red component
+ * @g: green component
+ * @b: blue component
+ *
+ * Sets a single pixel in an Cairo image surface in %CAIRO_FORMAT_RGB24.
+ *
+ * Since: 2.6
+ **/
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+#define GIMP_CAIRO_RGB24_SET_PIXEL(d, r, g, b) \
+  G_STMT_START { d[0] = (b);  d[1] = (g);  d[2] = (r); } G_STMT_END
+#else
+#define GIMP_CAIRO_RGB24_SET_PIXEL(d, r, g, b) \
+  G_STMT_START { d[1] = (r);  d[2] = (g);  d[3] = (b); } G_STMT_END
+#endif
+
+
+/**
+ * GIMP_CAIRO_RGB24_GET_PIXEL:
+ * @s: pointer to the source buffer
+ * @r: red component
+ * @g: green component
+ * @b: blue component
+ *
+ * Gets a single pixel from a Cairo image surface in %CAIRO_FORMAT_RGB24.
+ *
+ * Since: 2.8
+ **/
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+#define GIMP_CAIRO_RGB24_GET_PIXEL(s, r, g, b) \
+  G_STMT_START { (b) = s[0]; (g) = s[1]; (r) = s[2]; } G_STMT_END
+#else
+#define GIMP_CAIRO_RGB24_GET_PIXEL(s, r, g, b) \
+  G_STMT_START { (r) = s[1]; (g) = s[2]; (b) = s[3]; } G_STMT_END
+#endif
+
+
+/**
+ * GIMP_CAIRO_ARGB32_SET_PIXEL:
+ * @d: pointer to the destination buffer
+ * @r: red component, not pre-multiplied
+ * @g: green component, not pre-multiplied
+ * @b: blue component, not pre-multiplied
+ * @a: alpha component
+ *
+ * Sets a single pixel in an Cairo image surface in %CAIRO_FORMAT_ARGB32.
+ *
+ * Since: 2.6
+ **/
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+#define GIMP_CAIRO_ARGB32_SET_PIXEL(d, r, g, b, a) \
+  G_STMT_START {                                   \
+    const guint tr = (a) * (r) + 0x80;             \
+    const guint tg = (a) * (g) + 0x80;             \
+    const guint tb = (a) * (b) + 0x80;             \
+    (d)[0] = (((tb) >> 8) + (tb)) >> 8;            \
+    (d)[1] = (((tg) >> 8) + (tg)) >> 8;            \
+    (d)[2] = (((tr) >> 8) + (tr)) >> 8;            \
+    (d)[3] = (a);                                  \
+  } G_STMT_END
+#else
+#define GIMP_CAIRO_ARGB32_SET_PIXEL(d, r, g, b, a) \
+  G_STMT_START {                                   \
+    const guint tr = (a) * (r) + 0x80;             \
+    const guint tg = (a) * (g) + 0x80;             \
+    const guint tb = (a) * (b) + 0x80;             \
+    (d)[0] = (a);                                  \
+    (d)[1] = (((tr) >> 8) + (tr)) >> 8;            \
+    (d)[2] = (((tg) >> 8) + (tg)) >> 8;            \
+    (d)[3] = (((tb) >> 8) + (tb)) >> 8;            \
+  } G_STMT_END
+#endif
+
+
+/**
+ * GIMP_CAIRO_ARGB32_GET_PIXEL:
+ * @s: pointer to the source buffer
+ * @r: red component, not pre-multiplied
+ * @g: green component, not pre-multiplied
+ * @b: blue component, not pre-multiplied
+ * @a: alpha component
+ *
+ * Gets a single pixel from a Cairo image surface in %CAIRO_FORMAT_ARGB32.
+ *
+ * Since: 2.8
+ **/
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+#define GIMP_CAIRO_ARGB32_GET_PIXEL(s, r, g, b, a) \
+  G_STMT_START {                                   \
+    const guint tb = (s)[0];                       \
+    const guint tg = (s)[1];                       \
+    const guint tr = (s)[2];                       \
+    const guint ta = (s)[3];                       \
+    (r) = (tr << 8) / (ta + 1);                    \
+    (g) = (tg << 8) / (ta + 1);                    \
+    (b) = (tb << 8) / (ta + 1);                    \
+    (a) = ta;                                      \
+  } G_STMT_END
+#else
+#define GIMP_CAIRO_ARGB32_GET_PIXEL(s, r, g, b, a) \
+  G_STMT_START {                                   \
+    const guint ta = (s)[0];                       \
+    const guint tr = (s)[1];                       \
+    const guint tg = (s)[2];                       \
+    const guint tb = (s)[3];                       \
+    (r) = (tr << 8) / (ta + 1);                    \
+    (g) = (tg << 8) / (ta + 1);                    \
+    (b) = (tb << 8) / (ta + 1);                    \
+    (a) = ta;                                      \
+  } G_STMT_END
+#endif
+
+
+#endif /* __GIMP_CAIRO_H__ */
diff --git a/libgimpcolor/gimpcmyk.c b/libgimpcolor/gimpcmyk.c
new file mode 100644
index 0000000..28b08eb
--- /dev/null
+++ b/libgimpcolor/gimpcmyk.c
@@ -0,0 +1,233 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <glib-object.h>
+
+#include "libgimpmath/gimpmath.h"
+
+#include "gimpcolortypes.h"
+
+#include "gimpcmyk.h"
+
+
+/**
+ * SECTION: gimpcmyk
+ * @title: GimpCMYK
+ * @short_description: Definitions and Functions relating to CMYK colors.
+ *
+ * Definitions and Functions relating to CMYK colors.
+ **/
+
+
+/*
+ * GIMP_TYPE_CMYK
+ */
+
+static GimpCMYK * gimp_cmyk_copy (const GimpCMYK *cmyk);
+
+
+GType
+gimp_cmyk_get_type (void)
+{
+  static GType cmyk_type = 0;
+
+  if (!cmyk_type)
+    cmyk_type = g_boxed_type_register_static ("GimpCMYK",
+                                              (GBoxedCopyFunc) gimp_cmyk_copy,
+                                              (GBoxedFreeFunc) g_free);
+
+  return cmyk_type;
+}
+
+static GimpCMYK *
+gimp_cmyk_copy (const GimpCMYK *cmyk)
+{
+  return g_memdup (cmyk, sizeof (GimpCMYK));
+}
+
+
+/*  CMYK functions  */
+
+/**
+ * gimp_cmyk_set:
+ * @cmyk:    A #GimpCMYK structure which will hold the specified CMYK value.
+ * @cyan:    The Cyan channel of the CMYK value
+ * @magenta: The Magenta channel
+ * @yellow:  The Yellow channel
+ * @black:   The blacK channel
+ *
+ * Very basic initialiser for the internal #GimpCMYK structure. Channel
+ * values are doubles in the range 0 to 1.
+ **/
+void
+gimp_cmyk_set (GimpCMYK *cmyk,
+               gdouble   cyan,
+               gdouble   magenta,
+               gdouble   yellow,
+               gdouble   black)
+{
+  g_return_if_fail (cmyk != NULL);
+
+  cmyk->c = cyan;
+  cmyk->m = magenta;
+  cmyk->y = yellow;
+  cmyk->k = black;
+}
+
+/**
+ * gimp_cmyk_set_uchar:
+ * @cmyk:    A #GimpCMYK structure which will hold the specified CMYK value.
+ * @cyan:    The Cyan channel of the CMYK value
+ * @magenta: The Magenta channel
+ * @yellow:  The Yellow channel
+ * @black:   The blacK channel
+ *
+ * The same as gimp_cmyk_set(), except that channel values are
+ * unsigned chars in the range 0 to 255.
+ **/
+void
+gimp_cmyk_set_uchar (GimpCMYK *cmyk,
+                     guchar    cyan,
+                     guchar    magenta,
+                     guchar    yellow,
+                     guchar    black)
+{
+  g_return_if_fail (cmyk != NULL);
+
+  cmyk->c = (gdouble) cyan    / 255.0;
+  cmyk->m = (gdouble) magenta / 255.0;
+  cmyk->y = (gdouble) yellow  / 255.0;
+  cmyk->k = (gdouble) black   / 255.0;
+}
+
+/**
+ * gimp_cmyk_get_uchar:
+ * @cmyk:    A #GimpCMYK structure which will hold the specified CMYK value.
+ * @cyan:    The Cyan channel of the CMYK value
+ * @magenta: The Magenta channel
+ * @yellow:  The Yellow channel
+ * @black:   The blacK channel
+ *
+ * Retrieve individual channel values from a #GimpCMYK structure. Channel
+ * values are pointers to unsigned chars in the range 0 to 255.
+ **/
+void
+gimp_cmyk_get_uchar (const GimpCMYK *cmyk,
+                     guchar         *cyan,
+                     guchar         *magenta,
+                     guchar         *yellow,
+                     guchar         *black)
+{
+  g_return_if_fail (cmyk != NULL);
+
+  if (cyan)    *cyan    = ROUND (CLAMP (cmyk->c, 0.0, 1.0) * 255.0);
+  if (magenta) *magenta = ROUND (CLAMP (cmyk->m, 0.0, 1.0) * 255.0);
+  if (yellow)  *yellow  = ROUND (CLAMP (cmyk->y, 0.0, 1.0) * 255.0);
+  if (black)   *black   = ROUND (CLAMP (cmyk->k, 0.0, 1.0) * 255.0);
+}
+
+
+/*  CMYKA functions  */
+
+/**
+ * gimp_cmyka_set:
+ * @cmyka:   A #GimpCMYK structure which will hold the specified CMYKA value.
+ * @cyan:    The Cyan channel of the CMYK value
+ * @magenta: The Magenta channel
+ * @yellow:  The Yellow channel
+ * @black:   The blacK channel
+ * @alpha:   The Alpha channel
+ *
+ * Initialiser for the internal #GimpCMYK structure. Channel values are
+ * doubles in the range 0 to 1.
+ **/
+void
+gimp_cmyka_set (GimpCMYK *cmyka,
+                gdouble   cyan,
+                gdouble   magenta,
+                gdouble   yellow,
+                gdouble   black,
+                gdouble   alpha)
+{
+  g_return_if_fail (cmyka != NULL);
+
+  cmyka->c = cyan;
+  cmyka->m = magenta;
+  cmyka->y = yellow;
+  cmyka->k = black;
+  cmyka->a = alpha;
+}
+
+/**
+ * gimp_cmyka_set_uchar:
+ * @cmyka:   A #GimpCMYK structure which will hold the specified CMYKA value.
+ * @cyan:    The Cyan channel of the CMYK value
+ * @magenta: The Magenta channel
+ * @yellow:  The Yellow channel
+ * @black:   The blacK channel
+ * @alpha:   The Alpha channel
+ *
+ * The same as gimp_cmyka_set(), except that channel values are
+ * unsigned chars in the range 0 to 255.
+ **/
+void
+gimp_cmyka_set_uchar (GimpCMYK *cmyka,
+                      guchar    cyan,
+                      guchar    magenta,
+                      guchar    yellow,
+                      guchar    black,
+                      guchar    alpha)
+{
+  g_return_if_fail (cmyka != NULL);
+
+  cmyka->c = (gdouble) cyan    / 255.0;
+  cmyka->m = (gdouble) magenta / 255.0;
+  cmyka->y = (gdouble) yellow  / 255.0;
+  cmyka->k = (gdouble) black   / 255.0;
+  cmyka->a = (gdouble) alpha   / 255.0;
+}
+/**
+ * gimp_cmyka_get_uchar:
+ * @cmyka:   A #GimpCMYK structure which will hold the specified CMYKA value.
+ * @cyan:    The Cyan channel of the CMYK value
+ * @magenta: The Magenta channel
+ * @yellow:  The Yellow channel
+ * @black:   The blacK channel
+ * @alpha:   The Alpha channel
+ *
+ * Retrieve individual channel values from a #GimpCMYK structure.
+ * Channel values are pointers to unsigned chars in the range 0 to 255.
+ **/
+void
+gimp_cmyka_get_uchar (const GimpCMYK *cmyka,
+                      guchar         *cyan,
+                      guchar         *magenta,
+                      guchar         *yellow,
+                      guchar         *black,
+                      guchar         *alpha)
+{
+  g_return_if_fail (cmyka != NULL);
+
+  if (cyan)    *cyan    = ROUND (CLAMP (cmyka->c, 0.0, 1.0) * 255.0);
+  if (magenta) *magenta = ROUND (CLAMP (cmyka->m, 0.0, 1.0) * 255.0);
+  if (yellow)  *yellow  = ROUND (CLAMP (cmyka->y, 0.0, 1.0) * 255.0);
+  if (black)   *black   = ROUND (CLAMP (cmyka->k, 0.0, 1.0) * 255.0);
+  if (alpha)   *alpha   = ROUND (CLAMP (cmyka->a, 0.0, 1.0) * 255.0);
+}
diff --git a/libgimpcolor/gimpcmyk.h b/libgimpcolor/gimpcmyk.h
new file mode 100644
index 0000000..cafb252
--- /dev/null
+++ b/libgimpcolor/gimpcmyk.h
@@ -0,0 +1,78 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_COLOR_H_INSIDE__) && !defined (GIMP_COLOR_COMPILATION)
+#error "Only <libgimpcolor/gimpcolor.h> can be included directly."
+#endif
+
+#ifndef __GIMP_CMYK_H__
+#define __GIMP_CMYK_H__
+
+G_BEGIN_DECLS
+
+
+/* For information look into the C source or the html documentation */
+
+
+/*
+ * GIMP_TYPE_CMYK
+ */
+
+#define GIMP_TYPE_CMYK       (gimp_cmyk_get_type ())
+
+GType   gimp_cmyk_get_type   (void) G_GNUC_CONST;
+
+void    gimp_cmyk_set        (GimpCMYK       *cmyk,
+                              gdouble         cyan,
+                              gdouble         magenta,
+                              gdouble         yellow,
+                              gdouble         black);
+void    gimp_cmyk_set_uchar  (GimpCMYK       *cmyk,
+                              guchar          cyan,
+                              guchar          magenta,
+                              guchar          yellow,
+                              guchar          black);
+void    gimp_cmyk_get_uchar  (const GimpCMYK *cmyk,
+                              guchar         *cyan,
+                              guchar         *magenta,
+                              guchar         *yellow,
+                              guchar         *black);
+
+void    gimp_cmyka_set       (GimpCMYK       *cmyka,
+                              gdouble         cyan,
+                              gdouble         magenta,
+                              gdouble         yellow,
+                              gdouble         black,
+                              gdouble         alpha);
+void    gimp_cmyka_set_uchar (GimpCMYK       *cmyka,
+                              guchar          cyan,
+                              guchar          magenta,
+                              guchar          yellow,
+                              guchar          black,
+                              guchar          alpha);
+void    gimp_cmyka_get_uchar (const GimpCMYK *cmyka,
+                              guchar         *cyan,
+                              guchar         *magenta,
+                              guchar         *yellow,
+                              guchar         *black,
+                              guchar         *alpha);
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_CMYK_H__ */
diff --git a/libgimpcolor/gimpcolor.def b/libgimpcolor/gimpcolor.def
new file mode 100644
index 0000000..3feaf98
--- /dev/null
+++ b/libgimpcolor/gimpcolor.def
@@ -0,0 +1,128 @@
+EXPORTS
+	gimp_adaptive_supersample_area
+	gimp_bilinear
+	gimp_bilinear_16
+	gimp_bilinear_32
+	gimp_bilinear_8
+	gimp_bilinear_pixels_8
+	gimp_bilinear_rgb
+	gimp_bilinear_rgba
+	gimp_cairo_checkerboard_create
+	gimp_cairo_set_source_rgb
+	gimp_cairo_set_source_rgba
+	gimp_cairo_surface_create_buffer
+	gimp_cairo_surface_get_format
+	gimp_cmyk_get_type
+	gimp_cmyk_get_uchar
+	gimp_cmyk_set
+	gimp_cmyk_set_uchar
+	gimp_cmyk_to_rgb
+	gimp_cmyk_to_rgb_int
+	gimp_cmyka_get_uchar
+	gimp_cmyka_set
+	gimp_cmyka_set_uchar
+	gimp_color_managed_get_color_profile
+	gimp_color_managed_get_icc_profile
+	gimp_color_managed_get_type
+	gimp_color_managed_interface_get_type
+	gimp_color_managed_profile_changed
+	gimp_color_profile_get_copyright
+	gimp_color_profile_get_description
+	gimp_color_profile_get_format
+	gimp_color_profile_get_icc_profile
+	gimp_color_profile_get_label
+	gimp_color_profile_get_lcms_format
+	gimp_color_profile_get_lcms_profile
+	gimp_color_profile_get_manufacturer
+	gimp_color_profile_get_model
+	gimp_color_profile_get_space
+	gimp_color_profile_get_summary
+	gimp_color_profile_get_type
+	gimp_color_profile_is_cmyk
+	gimp_color_profile_is_equal
+	gimp_color_profile_is_gray
+	gimp_color_profile_is_linear
+	gimp_color_profile_is_rgb
+	gimp_color_profile_new_d50_gray_lab_trc
+	gimp_color_profile_new_d65_gray_linear
+	gimp_color_profile_new_d65_gray_srgb_trc
+	gimp_color_profile_new_from_file
+	gimp_color_profile_new_from_icc_profile
+	gimp_color_profile_new_from_lcms_profile
+	gimp_color_profile_new_linear_from_color_profile
+	gimp_color_profile_new_rgb_adobe
+	gimp_color_profile_new_rgb_srgb
+	gimp_color_profile_new_rgb_srgb_linear
+	gimp_color_profile_new_srgb_trc_from_color_profile
+	gimp_color_profile_save_to_file
+	gimp_color_transform_can_gegl_copy
+	gimp_color_transform_get_type
+	gimp_color_transform_new
+	gimp_color_transform_new_proofing
+	gimp_color_transform_process_buffer
+	gimp_color_transform_process_pixels
+	gimp_hsl_get_type
+	gimp_hsl_set
+	gimp_hsl_set_alpha
+	gimp_hsl_to_rgb
+	gimp_hsl_to_rgb_int
+	gimp_hsv_clamp
+	gimp_hsv_get_type
+	gimp_hsv_set
+	gimp_hsv_to_rgb
+	gimp_hsv_to_rgb4
+	gimp_hsv_to_rgb_int
+	gimp_hsva_set
+	gimp_hwb_to_rgb
+	gimp_param_rgb_get_type
+	gimp_param_spec_rgb
+	gimp_param_spec_rgb_get_default
+	gimp_param_spec_rgb_has_alpha
+	gimp_pixbuf_create_buffer
+	gimp_pixbuf_get_format
+	gimp_pixbuf_get_icc_profile
+	gimp_rgb_add
+	gimp_rgb_clamp
+	gimp_rgb_composite
+	gimp_rgb_distance
+	gimp_rgb_gamma
+	gimp_rgb_get_pixel
+	gimp_rgb_get_type
+	gimp_rgb_get_uchar
+	gimp_rgb_intensity
+	gimp_rgb_intensity_uchar
+	gimp_rgb_list_names
+	gimp_rgb_luminance
+	gimp_rgb_luminance_uchar
+	gimp_rgb_max
+	gimp_rgb_min
+	gimp_rgb_multiply
+	gimp_rgb_parse_css
+	gimp_rgb_parse_hex
+	gimp_rgb_parse_name
+	gimp_rgb_set
+	gimp_rgb_set_alpha
+	gimp_rgb_set_pixel
+	gimp_rgb_set_uchar
+	gimp_rgb_subtract
+	gimp_rgb_to_cmyk
+	gimp_rgb_to_cmyk_int
+	gimp_rgb_to_hsl
+	gimp_rgb_to_hsl_int
+	gimp_rgb_to_hsv
+	gimp_rgb_to_hsv4
+	gimp_rgb_to_hsv_int
+	gimp_rgb_to_hwb
+	gimp_rgb_to_l_int
+	gimp_rgba_add
+	gimp_rgba_distance
+	gimp_rgba_get_pixel
+	gimp_rgba_get_uchar
+	gimp_rgba_multiply
+	gimp_rgba_parse_css
+	gimp_rgba_set
+	gimp_rgba_set_pixel
+	gimp_rgba_set_uchar
+	gimp_rgba_subtract
+	gimp_value_get_rgb
+	gimp_value_set_rgb
diff --git a/libgimpcolor/gimpcolor.h b/libgimpcolor/gimpcolor.h
new file mode 100644
index 0000000..7e960a1
--- /dev/null
+++ b/libgimpcolor/gimpcolor.h
@@ -0,0 +1,41 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_COLOR_H__
+#define __GIMP_COLOR_H__
+
+#define __GIMP_COLOR_H_INSIDE__
+
+#include <libgimpcolor/gimpcolortypes.h>
+
+#include <libgimpcolor/gimpadaptivesupersample.h>
+#include <libgimpcolor/gimpbilinear.h>
+#include <libgimpcolor/gimpcairo.h>
+#include <libgimpcolor/gimpcolormanaged.h>
+#include <libgimpcolor/gimpcolorprofile.h>
+#include <libgimpcolor/gimpcolorspace.h>
+#include <libgimpcolor/gimpcolortransform.h>
+#include <libgimpcolor/gimpcmyk.h>
+#include <libgimpcolor/gimphsl.h>
+#include <libgimpcolor/gimphsv.h>
+#include <libgimpcolor/gimppixbuf.h>
+#include <libgimpcolor/gimprgb.h>
+
+#undef __GIMP_COLOR_H_INSIDE__
+
+#endif  /* __GIMP_COLOR_H__ */
diff --git a/libgimpcolor/gimpcolormanaged.c b/libgimpcolor/gimpcolormanaged.c
new file mode 100644
index 0000000..60c6eb1
--- /dev/null
+++ b/libgimpcolor/gimpcolormanaged.c
@@ -0,0 +1,151 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * GimpColorManaged interface
+ * Copyright (C) 2007  Sven Neumann <sven@gimp.org>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gio/gio.h>
+#include <gegl.h>
+
+#include "gimpcolortypes.h"
+
+#include "gimpcolormanaged.h"
+#include "gimpcolorprofile.h"
+
+
+/**
+ * SECTION: gimpcolormanaged
+ * @title: GimpColorManaged
+ * @short_description: An interface dealing with color profiles.
+ *
+ * An interface dealing with color profiles.
+ **/
+
+
+enum
+{
+  PROFILE_CHANGED,
+  LAST_SIGNAL
+};
+
+
+G_DEFINE_INTERFACE (GimpColorManaged, gimp_color_managed, G_TYPE_OBJECT)
+
+
+static guint gimp_color_managed_signals[LAST_SIGNAL] = { 0 };
+
+
+/*  private functions  */
+
+
+GType
+gimp_color_managed_interface_get_type (void)
+{
+  return gimp_color_managed_get_type ();
+}
+
+static void
+gimp_color_managed_default_init (GimpColorManagedInterface *iface)
+{
+  gimp_color_managed_signals[PROFILE_CHANGED] =
+    g_signal_new ("profile-changed",
+                  G_TYPE_FROM_INTERFACE (iface),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpColorManagedInterface,
+                                   profile_changed),
+                  NULL, NULL,
+                  g_cclosure_marshal_VOID__VOID,
+                  G_TYPE_NONE, 0);
+}
+
+
+/*  public functions  */
+
+
+/**
+ * gimp_color_managed_get_icc_profile:
+ * @managed: an object the implements the #GimpColorManaged interface
+ * @len:     return location for the number of bytes in the profile data
+ *
+ * Return value: A pointer to a blob of data that represents an ICC
+ *               color profile.
+ *
+ * Since: 2.4
+ **/
+const guint8 *
+gimp_color_managed_get_icc_profile (GimpColorManaged *managed,
+                                    gsize            *len)
+{
+  GimpColorManagedInterface *iface;
+
+  g_return_val_if_fail (GIMP_IS_COLOR_MANAGED (managed), NULL);
+  g_return_val_if_fail (len != NULL, NULL);
+
+  *len = 0;
+
+  iface = GIMP_COLOR_MANAGED_GET_INTERFACE (managed);
+
+  if (iface->get_icc_profile)
+    return iface->get_icc_profile (managed, len);
+
+  return NULL;
+}
+
+/**
+ * gimp_color_managed_get_color_profile:
+ * @managed: an object the implements the #GimpColorManaged interface
+ *
+ * This function always returns a #GimpColorProfile and falls back to
+ * gimp_color_profile_new_rgb_srgb() if the method is not implemented.
+ *
+ * Return value: The @managed's #GimpColorProfile.
+ *
+ * Since: 2.10
+ **/
+GimpColorProfile *
+gimp_color_managed_get_color_profile (GimpColorManaged *managed)
+{
+  GimpColorManagedInterface *iface;
+
+  g_return_val_if_fail (GIMP_IS_COLOR_MANAGED (managed), NULL);
+
+  iface = GIMP_COLOR_MANAGED_GET_INTERFACE (managed);
+
+  if (iface->get_color_profile)
+    return iface->get_color_profile (managed);
+
+  return NULL;
+}
+
+/**
+ * gimp_color_managed_profile_changed:
+ * @managed: an object the implements the #GimpColorManaged interface
+ *
+ * Emits the "profile-changed" signal.
+ *
+ * Since: 2.4
+ **/
+void
+gimp_color_managed_profile_changed (GimpColorManaged *managed)
+{
+  g_return_if_fail (GIMP_IS_COLOR_MANAGED (managed));
+
+  g_signal_emit (managed, gimp_color_managed_signals[PROFILE_CHANGED], 0);
+}
diff --git a/libgimpcolor/gimpcolormanaged.h b/libgimpcolor/gimpcolormanaged.h
new file mode 100644
index 0000000..d24e0c8
--- /dev/null
+++ b/libgimpcolor/gimpcolormanaged.h
@@ -0,0 +1,82 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * GimpColorManaged interface
+ * Copyright (C) 2007  Sven Neumann <sven@gimp.org>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_COLOR_H_INSIDE__) && !defined (GIMP_COLOR_COMPILATION)
+#error "Only <libgimpcolor/gimpcolor.h> can be included directly."
+#endif
+
+#ifndef __GIMP_COLOR_MANAGED_H__
+#define __GIMP_COLOR_MANAGED_H__
+
+G_BEGIN_DECLS
+
+/* For information look into the C source or the html documentation */
+
+
+#define GIMP_TYPE_COLOR_MANAGED               (gimp_color_managed_get_type ())
+#define GIMP_IS_COLOR_MANAGED(obj)            (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_COLOR_MANAGED))
+#define GIMP_COLOR_MANAGED(obj)               (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_COLOR_MANAGED, GimpColorManaged))
+#define GIMP_COLOR_MANAGED_GET_INTERFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), GIMP_TYPE_COLOR_MANAGED, GimpColorManagedInterface))
+
+
+typedef struct _GimpColorManagedInterface GimpColorManagedInterface;
+
+/**
+ * GimpColorManagedInterface:
+ * @base_iface: The parent interface
+ * @get_icc_profile: Returns the ICC profile of the pixels managed by
+ *                   the object
+ * @profile_changed: This signal is emitted when the object's color profile
+ *                   has changed
+ * @get_color_profile: Returns the #GimpColorProfile of the pixels managed
+ *                     by the object
+ **/
+struct _GimpColorManagedInterface
+{
+  GTypeInterface  base_iface;
+
+  /*  virtual functions  */
+  const guint8     * (* get_icc_profile)   (GimpColorManaged *managed,
+                                            gsize            *len);
+
+  /*  signals  */
+  void               (* profile_changed)   (GimpColorManaged *managed);
+
+  /*  virtual functions  */
+  GimpColorProfile * (* get_color_profile) (GimpColorManaged *managed);
+};
+
+
+GType              gimp_color_managed_get_type           (void) G_GNUC_CONST;
+
+GIMP_DEPRECATED_FOR (gimp_color_managed_get_type)
+GType              gimp_color_managed_interface_get_type (void) G_GNUC_CONST;
+
+const guint8     * gimp_color_managed_get_icc_profile    (GimpColorManaged *managed,
+                                                          gsize            *len);
+GimpColorProfile * gimp_color_managed_get_color_profile  (GimpColorManaged *managed);
+
+void               gimp_color_managed_profile_changed    (GimpColorManaged *managed);
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_COLOR_MANAGED_IFACE_H__ */
diff --git a/libgimpcolor/gimpcolorprofile.c b/libgimpcolor/gimpcolorprofile.c
new file mode 100644
index 0000000..69236b4
--- /dev/null
+++ b/libgimpcolor/gimpcolorprofile.c
@@ -0,0 +1,1789 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * gimpcolorprofile.c
+ * Copyright (C) 2014  Michael Natterer <mitch@gimp.org>
+ *                     Elle Stone <ellestone@ninedegreesbelow.com>
+ *                     Øyvind Kolås <pippin@gimp.org>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <lcms2.h>
+
+#include <gio/gio.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "gimpcolortypes.h"
+
+#include "gimpcolorprofile.h"
+
+#include "libgimp/libgimp-intl.h"
+
+
+#ifndef TYPE_RGBA_DBL
+#define TYPE_RGBA_DBL       (FLOAT_SH(1)|COLORSPACE_SH(PT_RGB)|EXTRA_SH(1)|CHANNELS_SH(3)|BYTES_SH(0))
+#endif
+
+#ifndef TYPE_GRAYA_HALF_FLT
+#define TYPE_GRAYA_HALF_FLT (FLOAT_SH(1)|COLORSPACE_SH(PT_GRAY)|EXTRA_SH(1)|CHANNELS_SH(1)|BYTES_SH(2))
+#endif
+
+#ifndef TYPE_GRAYA_FLT
+#define TYPE_GRAYA_FLT      (FLOAT_SH(1)|COLORSPACE_SH(PT_GRAY)|EXTRA_SH(1)|CHANNELS_SH(1)|BYTES_SH(4))
+#endif
+
+#ifndef TYPE_GRAYA_DBL
+#define TYPE_GRAYA_DBL      (FLOAT_SH(1)|COLORSPACE_SH(PT_GRAY)|EXTRA_SH(1)|CHANNELS_SH(1)|BYTES_SH(0))
+#endif
+
+#ifndef TYPE_CMYKA_DBL
+#define TYPE_CMYKA_DBL      (FLOAT_SH(1)|COLORSPACE_SH(PT_CMYK)|EXTRA_SH(1)|CHANNELS_SH(4)|BYTES_SH(0))
+#endif
+
+#ifndef TYPE_CMYKA_HALF_FLT
+#define TYPE_CMYKA_HALF_FLT (FLOAT_SH(1)|COLORSPACE_SH(PT_CMYK)|EXTRA_SH(1)|CHANNELS_SH(4)|BYTES_SH(2))
+#endif
+
+#ifndef TYPE_CMYKA_FLT
+#define TYPE_CMYKA_FLT      (FLOAT_SH(1)|COLORSPACE_SH(PT_CMYK)|EXTRA_SH(1)|CHANNELS_SH(4)|BYTES_SH(4))
+#endif
+
+#ifndef TYPE_CMYKA_16
+#define TYPE_CMYKA_16       (COLORSPACE_SH(PT_CMYK)|EXTRA_SH(1)|CHANNELS_SH(4)|BYTES_SH(2))
+#endif
+
+
+/**
+ * SECTION: gimpcolorprofile
+ * @title: GimpColorProfile
+ * @short_description: Definitions and Functions relating to LCMS.
+ *
+ * Definitions and Functions relating to LCMS.
+ **/
+
+/**
+ * GimpColorProfile:
+ *
+ * Simply a typedef to #gpointer, but actually is a cmsHPROFILE. It's
+ * used in public GIMP APIs in order to avoid having to include LCMS
+ * headers.
+ **/
+
+
+struct _GimpColorProfilePrivate
+{
+  cmsHPROFILE  lcms_profile;
+  guint8      *data;
+  gsize        length;
+
+  gchar       *description;
+  gchar       *manufacturer;
+  gchar       *model;
+  gchar       *copyright;
+  gchar       *label;
+  gchar       *summary;
+};
+
+
+static void   gimp_color_profile_finalize (GObject *object);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpColorProfile, gimp_color_profile, G_TYPE_OBJECT)
+
+#define parent_class gimp_color_profile_parent_class
+
+
+#define GIMP_COLOR_PROFILE_ERROR gimp_color_profile_error_quark ()
+
+static GQuark
+gimp_color_profile_error_quark (void)
+{
+  static GQuark quark = 0;
+
+  if (G_UNLIKELY (quark == 0))
+    quark = g_quark_from_static_string ("gimp-color-profile-error-quark");
+
+  return quark;
+}
+
+static void
+gimp_color_profile_class_init (GimpColorProfileClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = gimp_color_profile_finalize;
+}
+
+static void
+gimp_color_profile_init (GimpColorProfile *profile)
+{
+  profile->priv = gimp_color_profile_get_instance_private (profile);
+}
+
+static void
+gimp_color_profile_finalize (GObject *object)
+{
+  GimpColorProfile *profile = GIMP_COLOR_PROFILE (object);
+
+  g_clear_pointer (&profile->priv->lcms_profile, cmsCloseProfile);
+
+  g_clear_pointer (&profile->priv->data, g_free);
+  profile->priv->length = 0;
+
+  g_clear_pointer (&profile->priv->description,  g_free);
+  g_clear_pointer (&profile->priv->manufacturer, g_free);
+  g_clear_pointer (&profile->priv->model,        g_free);
+  g_clear_pointer (&profile->priv->copyright,    g_free);
+  g_clear_pointer (&profile->priv->label,        g_free);
+  g_clear_pointer (&profile->priv->summary,      g_free);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+
+/**
+ * gimp_color_profile_new_from_file:
+ * @file:  a #GFile
+ * @error: return location for #GError
+ *
+ * This function opens an ICC color profile from @file.
+ *
+ * Return value: the #GimpColorProfile, or %NULL. On error, %NULL is
+ *               returned and @error is set.
+ *
+ * Since: 2.10
+ **/
+GimpColorProfile *
+gimp_color_profile_new_from_file (GFile   *file,
+                                  GError **error)
+{
+  GimpColorProfile *profile      = NULL;
+  cmsHPROFILE       lcms_profile = NULL;
+  guint8           *data         = NULL;
+  gsize             length       = 0;
+  gchar            *path;
+
+  g_return_val_if_fail (G_IS_FILE (file), NULL);
+  g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+  path = g_file_get_path (file);
+
+  if (path)
+    {
+      GMappedFile *mapped;
+
+      mapped = g_mapped_file_new (path, FALSE, error);
+      g_free (path);
+
+      if (! mapped)
+        return NULL;
+
+      length = g_mapped_file_get_length (mapped);
+      data   = g_memdup (g_mapped_file_get_contents (mapped), length);
+
+      lcms_profile = cmsOpenProfileFromMem (data, length);
+
+      g_mapped_file_unref (mapped);
+    }
+  else
+    {
+      GFileInfo *info;
+
+      info = g_file_query_info (file,
+                                G_FILE_ATTRIBUTE_STANDARD_SIZE,
+                                G_FILE_QUERY_INFO_NONE,
+                                NULL, error);
+      if (info)
+        {
+          GInputStream *input;
+
+          length = g_file_info_get_size (info);
+          data   = g_malloc (length);
+
+          g_object_unref (info);
+
+          input = G_INPUT_STREAM (g_file_read (file, NULL, error));
+
+          if (input)
+            {
+              gsize bytes_read;
+
+              if (g_input_stream_read_all (input, data, length,
+                                           &bytes_read, NULL, error) &&
+                  bytes_read == length)
+                {
+                  lcms_profile = cmsOpenProfileFromMem (data, length);
+                }
+
+              g_object_unref (input);
+            }
+        }
+    }
+
+  if (lcms_profile)
+    {
+      profile = g_object_new (GIMP_TYPE_COLOR_PROFILE, NULL);
+
+      profile->priv->lcms_profile = lcms_profile;
+      profile->priv->data         = data;
+      profile->priv->length       = length;
+    }
+  else
+    {
+      if (data)
+        g_free (data);
+
+      if (error && *error == NULL)
+        {
+          g_set_error (error, GIMP_COLOR_PROFILE_ERROR, 0,
+                       _("'%s' does not appear to be an ICC color profile"),
+                       gimp_file_get_utf8_name (file));
+        }
+    }
+
+  return profile;
+}
+
+/**
+ * gimp_color_profile_new_from_icc_profile:
+ * @data:   pointer to memory containing an ICC profile
+ * @length: length of the profile in memory, in bytes
+ * @error:  return location for #GError
+ *
+ * This function opens an ICC color profile from memory. On error,
+ * %NULL is returned and @error is set.
+ *
+ * Return value: the #GimpColorProfile, or %NULL.
+ *
+ * Since: 2.10
+ **/
+GimpColorProfile *
+gimp_color_profile_new_from_icc_profile (const guint8  *data,
+                                         gsize          length,
+                                         GError       **error)
+{
+  cmsHPROFILE       lcms_profile = 0;
+  GimpColorProfile *profile      = NULL;
+
+  g_return_val_if_fail (data != NULL || length == 0, NULL);
+  g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+  if (length > 0)
+    lcms_profile = cmsOpenProfileFromMem (data, length);
+
+  if (lcms_profile)
+    {
+      profile = g_object_new (GIMP_TYPE_COLOR_PROFILE, NULL);
+
+      profile->priv->lcms_profile = lcms_profile;
+      profile->priv->data         = g_memdup (data, length);
+      profile->priv->length       = length;
+   }
+  else
+    {
+      g_set_error_literal (error, GIMP_COLOR_PROFILE_ERROR, 0,
+                           _("Data does not appear to be an ICC color profile"));
+    }
+
+  return profile;
+}
+
+/**
+ * gimp_color_profile_new_from_lcms_profile:
+ * @lcms_profile: an LCMS cmsHPROFILE pointer
+ * @error:        return location for #GError
+ *
+ * This function creates a GimpColorProfile from a cmsHPROFILE. On
+ * error, %NULL is returned and @error is set. The passed
+ * @lcms_profile pointer is not retained by the created
+ * #GimpColorProfile.
+ *
+ * Return value: the #GimpColorProfile, or %NULL.
+ *
+ * Since: 2.10
+ **/
+GimpColorProfile *
+gimp_color_profile_new_from_lcms_profile (gpointer   lcms_profile,
+                                          GError   **error)
+{
+  cmsUInt32Number size;
+
+  g_return_val_if_fail (lcms_profile != NULL, NULL);
+  g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+  if (cmsSaveProfileToMem (lcms_profile, NULL, &size))
+    {
+      guint8 *data = g_malloc (size);
+
+      if (cmsSaveProfileToMem (lcms_profile, data, &size))
+        {
+          gsize length = size;
+
+          lcms_profile = cmsOpenProfileFromMem (data, length);
+
+          if (lcms_profile)
+            {
+              GimpColorProfile *profile;
+
+              profile = g_object_new (GIMP_TYPE_COLOR_PROFILE, NULL);
+
+              profile->priv->lcms_profile = lcms_profile;
+              profile->priv->data         = data;
+              profile->priv->length       = length;
+
+              return profile;
+            }
+        }
+
+      g_free (data);
+    }
+
+  g_set_error_literal (error, GIMP_COLOR_PROFILE_ERROR, 0,
+                       _("Could not save color profile to memory"));
+
+  return NULL;
+}
+
+/**
+ * gimp_color_profile_save_to_file:
+ * @profile: a #GimpColorProfile
+ * @file:    a #GFile
+ * @error:   return location for #GError
+ *
+ * This function saves @profile to @file as ICC profile.
+ *
+ * Return value: %TRUE on success, %FALSE if an error occurred.
+ *
+ * Since: 2.10
+ **/
+gboolean
+gimp_color_profile_save_to_file (GimpColorProfile  *profile,
+                                 GFile             *file,
+                                 GError           **error)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), FALSE);
+  g_return_val_if_fail (G_IS_FILE (file), FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+  return g_file_replace_contents (file,
+                                  (const gchar *) profile->priv->data,
+                                  profile->priv->length,
+                                  NULL, FALSE,
+                                  G_FILE_CREATE_NONE,
+                                  NULL,
+                                  NULL,
+                                  error);
+}
+
+/**
+ * gimp_color_profile_get_icc_profile:
+ * @profile: a #GimpColorProfile
+ * @length:  return location for the number of bytes
+ *
+ * This function returns @profile as ICC profile data. The returned
+ * memory belongs to @profile and must not be modified or freed.
+ *
+ * Return value: a pointer to the IIC profile data.
+ *
+ * Since: 2.10
+ **/
+const guint8 *
+gimp_color_profile_get_icc_profile (GimpColorProfile  *profile,
+                                    gsize             *length)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+  g_return_val_if_fail (length != NULL, NULL);
+
+  *length = profile->priv->length;
+
+  return profile->priv->data;
+}
+
+/**
+ * gimp_color_profile_get_lcms_profile:
+ * @profile: a #GimpColorProfile
+ *
+ * This function returns @profile's cmsHPROFILE. The returned
+ * value belongs to @profile and must not be modified or freed.
+ *
+ * Return value: a pointer to the cmsHPROFILE.
+ *
+ * Since: 2.10
+ **/
+gpointer
+gimp_color_profile_get_lcms_profile (GimpColorProfile *profile)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+
+  return profile->priv->lcms_profile;
+}
+
+static gchar *
+gimp_color_profile_get_info (GimpColorProfile *profile,
+                             cmsInfoType       info)
+{
+  cmsUInt32Number  size;
+  gchar           *text = NULL;
+
+  size = cmsGetProfileInfoASCII (profile->priv->lcms_profile, info,
+                                 "en", "US", NULL, 0);
+  if (size > 0)
+    {
+      gchar *data = g_new (gchar, size + 1);
+
+      size = cmsGetProfileInfoASCII (profile->priv->lcms_profile, info,
+                                     "en", "US", data, size);
+      if (size > 0)
+        text = gimp_any_to_utf8 (data, -1, NULL);
+
+      g_free (data);
+    }
+
+  return text;
+}
+
+/**
+ * gimp_color_profile_get_description:
+ * @profile: a #GimpColorProfile
+ *
+ * Return value: a string containing @profile's description. The
+ *               returned value belongs to @profile and must not be
+ *               modified or freed.
+ *
+ * Since: 2.10
+ **/
+const gchar *
+gimp_color_profile_get_description (GimpColorProfile *profile)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+
+  if (! profile->priv->description)
+    profile->priv->description =
+      gimp_color_profile_get_info (profile, cmsInfoDescription);
+
+  return profile->priv->description;
+}
+
+/**
+ * gimp_color_profile_get_manufacturer:
+ * @profile: a #GimpColorProfile
+ *
+ * Return value: a string containing @profile's manufacturer. The
+ *               returned value belongs to @profile and must not be
+ *               modified or freed.
+ *
+ * Since: 2.10
+ **/
+const gchar *
+gimp_color_profile_get_manufacturer (GimpColorProfile *profile)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+
+  if (! profile->priv->manufacturer)
+    profile->priv->manufacturer =
+      gimp_color_profile_get_info (profile, cmsInfoManufacturer);
+
+  return profile->priv->manufacturer;
+}
+
+/**
+ * gimp_color_profile_get_model:
+ * @profile: a #GimpColorProfile
+ *
+ * Return value: a string containing @profile's model. The returned
+ *               value belongs to @profile and must not be modified or
+ *               freed.
+ *
+ * Since: 2.10
+ **/
+const gchar *
+gimp_color_profile_get_model (GimpColorProfile *profile)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+
+  if (! profile->priv->model)
+    profile->priv->model =
+      gimp_color_profile_get_info (profile, cmsInfoModel);
+
+  return profile->priv->model;
+}
+
+/**
+ * gimp_color_profile_get_copyright:
+ * @profile: a #GimpColorProfile
+ *
+ * Return value: a string containing @profile's copyright. The
+ *               returned value belongs to @profile and must not be
+ *               modified or freed.
+ *
+ * Since: 2.10
+ **/
+const gchar *
+gimp_color_profile_get_copyright (GimpColorProfile *profile)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+
+  if (! profile->priv->copyright)
+    profile->priv->copyright =
+      gimp_color_profile_get_info (profile, cmsInfoCopyright);
+
+  return profile->priv->copyright;
+}
+
+/**
+ * gimp_color_profile_get_label:
+ * @profile: a #GimpColorProfile
+ *
+ * This function returns a string containing @profile's "title", a
+ * string that can be used to label the profile in a user interface.
+ *
+ * Unlike gimp_color_profile_get_description(), this function always
+ * returns a string (as a fallback, it returns "(unnamed profile)").
+ *
+ * Return value: the @profile's label. The returned value belongs to
+ *               @profile and must not be modified or freed.
+ *
+ * Since: 2.10
+ **/
+const gchar *
+gimp_color_profile_get_label (GimpColorProfile *profile)
+{
+
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+
+  if (! profile->priv->label)
+    {
+      const gchar *label = gimp_color_profile_get_description (profile);
+
+      if (! label || ! strlen (label))
+        label = _("(unnamed profile)");
+
+      profile->priv->label = g_strdup (label);
+    }
+
+  return profile->priv->label;
+}
+
+/**
+ * gimp_color_profile_get_summary:
+ * @profile: a #GimpColorProfile
+ *
+ * This function return a string containing a multi-line summary of
+ * @profile's description, model, manufacturer and copyright, to be
+ * used as detailed information about the profile in a user
+ * interface.
+ *
+ * Return value: the @profile's summary. The returned value belongs to
+ *               @profile and must not be modified or freed.
+ *
+ * Since: 2.10
+ **/
+const gchar *
+gimp_color_profile_get_summary (GimpColorProfile *profile)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+
+  if (! profile->priv->summary)
+    {
+      GString     *string = g_string_new (NULL);
+      const gchar *text;
+
+      text = gimp_color_profile_get_description (profile);
+      if (text)
+        g_string_append (string, text);
+
+      text = gimp_color_profile_get_model (profile);
+      if (text)
+        {
+          if (string->len > 0)
+            g_string_append (string, "\n");
+
+          g_string_append_printf (string, _("Model: %s"), text);
+        }
+
+      text = gimp_color_profile_get_manufacturer (profile);
+      if (text)
+        {
+          if (string->len > 0)
+            g_string_append (string, "\n");
+
+          g_string_append_printf (string, _("Manufacturer: %s"), text);
+        }
+
+      text = gimp_color_profile_get_copyright (profile);
+      if (text)
+        {
+          if (string->len > 0)
+            g_string_append (string, "\n");
+
+          g_string_append_printf (string, _("Copyright: %s"), text);
+        }
+
+      profile->priv->summary = g_string_free (string, FALSE);
+    }
+
+  return profile->priv->summary;
+}
+
+/**
+ * gimp_color_profile_is_equal:
+ * @profile1: a #GimpColorProfile
+ * @profile2: a #GimpColorProfile
+ *
+ * Compares two profiles.
+ *
+ * Return value: %TRUE if the profiles are equal, %FALSE otherwise.
+ *
+ * Since: 2.10
+ **/
+gboolean
+gimp_color_profile_is_equal (GimpColorProfile *profile1,
+                             GimpColorProfile *profile2)
+{
+  const gsize header_len = sizeof (cmsICCHeader);
+
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile1), FALSE);
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile2), FALSE);
+
+  return profile1 == profile2                              ||
+         (profile1->priv->length == profile2->priv->length &&
+          memcmp (profile1->priv->data + header_len,
+                  profile2->priv->data + header_len,
+                  profile1->priv->length - header_len) == 0);
+}
+
+/**
+ * gimp_color_profile_is_rgb:
+ * @profile: a #GimpColorProfile
+ *
+ * Return value: %TRUE if the profile's color space is RGB, %FALSE
+ * otherwise.
+ *
+ * Since: 2.10
+ **/
+gboolean
+gimp_color_profile_is_rgb (GimpColorProfile *profile)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), FALSE);
+
+  return (cmsGetColorSpace (profile->priv->lcms_profile) == cmsSigRgbData);
+}
+
+/**
+ * gimp_color_profile_is_gray:
+ * @profile: a #GimpColorProfile
+ *
+ * Return value: %TRUE if the profile's color space is grayscale, %FALSE
+ * otherwise.
+ *
+ * Since: 2.10
+ **/
+gboolean
+gimp_color_profile_is_gray (GimpColorProfile *profile)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), FALSE);
+
+  return (cmsGetColorSpace (profile->priv->lcms_profile) == cmsSigGrayData);
+}
+
+/**
+ * gimp_color_profile_is_cmyk:
+ * @profile: a #GimpColorProfile
+ *
+ * Return value: %TRUE if the profile's color space is CMYK, %FALSE
+ * otherwise.
+ *
+ * Since: 2.10
+ **/
+gboolean
+gimp_color_profile_is_cmyk (GimpColorProfile *profile)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), FALSE);
+
+  return (cmsGetColorSpace (profile->priv->lcms_profile) == cmsSigCmykData);
+}
+
+
+/**
+ * gimp_color_profile_is_linear:
+ * @profile: a #GimpColorProfile
+ *
+ * This function determines is the ICC profile represented by a GimpColorProfile
+ * is a linear RGB profile or not, some profiles that are LUTs though linear
+ * will also return FALSE;
+ *
+ * Return value: %TRUE if the profile is a matrix shaping profile with linear
+ * TRCs, %FALSE otherwise.
+ *
+ * Since: 2.10
+ **/
+gboolean
+gimp_color_profile_is_linear (GimpColorProfile *profile)
+{
+  cmsHPROFILE   prof;
+  cmsToneCurve *curve;
+
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), FALSE);
+
+  prof = profile->priv->lcms_profile;
+
+  if (! cmsIsMatrixShaper (prof))
+    return FALSE;
+
+  if (cmsIsCLUT (prof, INTENT_PERCEPTUAL, LCMS_USED_AS_INPUT))
+    return FALSE;
+
+  if (cmsIsCLUT (prof, INTENT_PERCEPTUAL, LCMS_USED_AS_OUTPUT))
+    return FALSE;
+
+  if (gimp_color_profile_is_rgb (profile))
+    {
+      curve = cmsReadTag(prof, cmsSigRedTRCTag);
+      if (curve == NULL || ! cmsIsToneCurveLinear (curve))
+        return FALSE;
+
+      curve = cmsReadTag (prof, cmsSigGreenTRCTag);
+      if (curve == NULL || ! cmsIsToneCurveLinear (curve))
+        return FALSE;
+
+      curve = cmsReadTag (prof, cmsSigBlueTRCTag);
+      if (curve == NULL || ! cmsIsToneCurveLinear (curve))
+        return FALSE;
+    }
+  else if (gimp_color_profile_is_gray (profile))
+    {
+      curve = cmsReadTag(prof, cmsSigGrayTRCTag);
+      if (curve == NULL || ! cmsIsToneCurveLinear (curve))
+        return FALSE;
+    }
+  else
+    {
+      return FALSE;
+    }
+
+  return TRUE;
+}
+
+static void
+gimp_color_profile_set_tag (cmsHPROFILE      profile,
+                            cmsTagSignature  sig,
+                            const gchar     *tag)
+{
+  cmsMLU *mlu;
+
+  mlu = cmsMLUalloc (NULL, 1);
+  cmsMLUsetASCII (mlu, "en", "US", tag);
+  cmsWriteTag (profile, sig, mlu);
+  cmsMLUfree (mlu);
+}
+
+static gboolean
+gimp_color_profile_get_rgb_matrix_colorants (GimpColorProfile *profile,
+                                             GimpMatrix3      *matrix)
+{
+  cmsHPROFILE  lcms_profile;
+  cmsCIEXYZ   *red;
+  cmsCIEXYZ   *green;
+  cmsCIEXYZ   *blue;
+
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), FALSE);
+
+  lcms_profile = profile->priv->lcms_profile;
+
+  red   = cmsReadTag (lcms_profile, cmsSigRedColorantTag);
+  green = cmsReadTag (lcms_profile, cmsSigGreenColorantTag);
+  blue  = cmsReadTag (lcms_profile, cmsSigBlueColorantTag);
+
+  if (red && green && blue)
+    {
+      if (matrix)
+        {
+          matrix->coeff[0][0] = red->X;
+          matrix->coeff[0][1] = red->Y;
+          matrix->coeff[0][2] = red->Z;
+
+          matrix->coeff[1][0] = green->X;
+          matrix->coeff[1][1] = green->Y;
+          matrix->coeff[1][2] = green->Z;
+
+          matrix->coeff[2][0] = blue->X;
+          matrix->coeff[2][1] = blue->Y;
+          matrix->coeff[2][2] = blue->Z;
+        }
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+static void
+gimp_color_profile_make_tag (cmsHPROFILE       profile,
+                             cmsTagSignature   sig,
+                             const gchar      *gimp_tag,
+                             const gchar      *gimp_prefix,
+                             const gchar      *gimp_prefix_alt,
+                             const gchar      *original_tag)
+{
+  if (! original_tag || ! strlen (original_tag) ||
+      ! strcmp (original_tag, gimp_tag))
+    {
+      /* if there is no original tag (or it is the same as the new
+       * tag), just use the new tag
+       */
+
+      gimp_color_profile_set_tag (profile, sig, gimp_tag);
+    }
+  else
+    {
+      /* otherwise prefix the existing tag with a gimp prefix
+       * indicating that the profile has been generated
+       */
+
+      if (g_str_has_prefix (original_tag, gimp_prefix))
+        {
+          /* don't add multiple GIMP prefixes */
+          gimp_color_profile_set_tag (profile, sig, original_tag);
+        }
+      else if (gimp_prefix_alt &&
+               g_str_has_prefix (original_tag, gimp_prefix_alt))
+        {
+          /* replace GIMP prefix_alt by prefix */
+          gchar *new_tag = g_strconcat (gimp_prefix,
+                                        original_tag + strlen (gimp_prefix_alt),
+                                        NULL);
+
+          gimp_color_profile_set_tag (profile, sig, new_tag);
+          g_free (new_tag);
+        }
+      else
+        {
+          gchar *new_tag = g_strconcat (gimp_prefix,
+                                        original_tag,
+                                        NULL);
+
+          gimp_color_profile_set_tag (profile, sig, new_tag);
+          g_free (new_tag);
+        }
+    }
+}
+
+static GimpColorProfile *
+gimp_color_profile_new_from_color_profile (GimpColorProfile *profile,
+                                           gboolean          linear)
+{
+  GimpColorProfile *new_profile;
+  cmsHPROFILE       target_profile;
+  GimpMatrix3       matrix = { { { 0, } } };
+  cmsCIEXYZ        *whitepoint;
+  cmsToneCurve     *curve;
+
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+
+  if (gimp_color_profile_is_rgb (profile))
+    {
+      if (! gimp_color_profile_get_rgb_matrix_colorants (profile, &matrix))
+        return NULL;
+    }
+  else if (! gimp_color_profile_is_gray (profile))
+    {
+      return NULL;
+    }
+
+  whitepoint = cmsReadTag (profile->priv->lcms_profile,
+                           cmsSigMediaWhitePointTag);
+
+  target_profile = cmsCreateProfilePlaceholder (0);
+
+  cmsSetProfileVersion (target_profile, 4.3);
+  cmsSetDeviceClass (target_profile, cmsSigDisplayClass);
+  cmsSetPCS (target_profile, cmsSigXYZData);
+
+  cmsWriteTag (target_profile, cmsSigMediaWhitePointTag, whitepoint);
+
+  if (linear)
+    {
+      /* linear light */
+      curve = cmsBuildGamma (NULL, 1.00);
+
+      gimp_color_profile_make_tag (target_profile, cmsSigProfileDescriptionTag,
+                                   "linear TRC from unnamed profile",
+                                   "linear TRC from ",
+                                   "sRGB TRC from ",
+                                   gimp_color_profile_get_description (profile));
+    }
+  else
+    {
+      cmsFloat64Number srgb_parameters[5] =
+        { 2.4, 1.0 / 1.055,  0.055 / 1.055, 1.0 / 12.92, 0.04045 };
+
+      /* sRGB curve */
+      curve = cmsBuildParametricToneCurve (NULL, 4, srgb_parameters);
+
+      gimp_color_profile_make_tag (target_profile, cmsSigProfileDescriptionTag,
+                                   "sRGB TRC from unnamed profile",
+                                   "sRGB TRC from ",
+                                   "linear TRC from ",
+                                   gimp_color_profile_get_description (profile));
+    }
+
+  if (gimp_color_profile_is_rgb (profile))
+    {
+      cmsCIEXYZ red;
+      cmsCIEXYZ green;
+      cmsCIEXYZ blue;
+
+      cmsSetColorSpace (target_profile, cmsSigRgbData);
+
+      red.X = matrix.coeff[0][0];
+      red.Y = matrix.coeff[0][1];
+      red.Z = matrix.coeff[0][2];
+
+      green.X = matrix.coeff[1][0];
+      green.Y = matrix.coeff[1][1];
+      green.Z = matrix.coeff[1][2];
+
+      blue.X = matrix.coeff[2][0];
+      blue.Y = matrix.coeff[2][1];
+      blue.Z = matrix.coeff[2][2];
+
+      cmsWriteTag (target_profile, cmsSigRedColorantTag,   &red);
+      cmsWriteTag (target_profile, cmsSigGreenColorantTag, &green);
+      cmsWriteTag (target_profile, cmsSigBlueColorantTag,  &blue);
+
+      cmsWriteTag (target_profile, cmsSigRedTRCTag,   curve);
+      cmsWriteTag (target_profile, cmsSigGreenTRCTag, curve);
+      cmsWriteTag (target_profile, cmsSigBlueTRCTag,  curve);
+    }
+  else
+    {
+      cmsSetColorSpace (target_profile, cmsSigGrayData);
+
+      cmsWriteTag (target_profile, cmsSigGrayTRCTag, curve);
+    }
+
+  cmsFreeToneCurve (curve);
+
+  gimp_color_profile_make_tag (target_profile, cmsSigDeviceMfgDescTag,
+                               "GIMP",
+                               "GIMP from ", NULL,
+                               gimp_color_profile_get_manufacturer (profile));
+  gimp_color_profile_make_tag (target_profile, cmsSigDeviceModelDescTag,
+                               "Generated by GIMP",
+                               "GIMP from ", NULL,
+                               gimp_color_profile_get_model (profile));
+  gimp_color_profile_make_tag (target_profile, cmsSigCopyrightTag,
+                               "Public Domain",
+                               "GIMP from ", NULL,
+                               gimp_color_profile_get_copyright (profile));
+
+  new_profile = gimp_color_profile_new_from_lcms_profile (target_profile, NULL);
+
+  cmsCloseProfile (target_profile);
+
+  return new_profile;
+}
+
+/**
+ * gimp_color_profile_new_srgb_trc_from_color_profile:
+ * @profile: a #GimpColorProfile
+ *
+ * This function creates a new RGB #GimpColorProfile with a sRGB gamma
+ * TRC and @profile's RGB chromacities and whitepoint.
+ *
+ * Return value: the new #GimpColorProfile, or %NULL if @profile is not
+ *               an RGB profile or not matrix-based.
+ *
+ * Since: 2.10
+ **/
+GimpColorProfile *
+gimp_color_profile_new_srgb_trc_from_color_profile (GimpColorProfile *profile)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+
+  return gimp_color_profile_new_from_color_profile (profile, FALSE);
+}
+
+/**
+ * gimp_color_profile_new_linear_from_color_profile:
+ * @profile: a #GimpColorProfile
+ *
+ * This function creates a new RGB #GimpColorProfile with a linear TRC
+ * and @profile's RGB chromacities and whitepoint.
+ *
+ * Return value: the new #GimpColorProfile, or %NULL if @profile is not
+ *               an RGB profile or not matrix-based.
+ *
+ * Since: 2.10
+ **/
+GimpColorProfile *
+gimp_color_profile_new_linear_from_color_profile (GimpColorProfile *profile)
+{
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+
+  return gimp_color_profile_new_from_color_profile (profile, TRUE);
+}
+
+static cmsHPROFILE *
+gimp_color_profile_new_rgb_srgb_internal (void)
+{
+  cmsHPROFILE profile;
+
+  /* white point is D65 from the sRGB specs */
+  cmsCIExyY whitepoint = { 0.3127, 0.3290, 1.0 };
+
+  /* primaries are ITU‐R BT.709‐5 (xYY), which are also the primaries
+   * from the sRGB specs, modified to properly account for hexadecimal
+   * quantization during the profile making process.
+   */
+  cmsCIExyYTRIPLE primaries =
+    {
+      /* R { 0.6400, 0.3300, 1.0 }, */
+      /* G { 0.3000, 0.6000, 1.0 }, */
+      /* B { 0.1500, 0.0600, 1.0 }  */
+      /* R */ { 0.639998686, 0.330010138, 1.0 },
+      /* G */ { 0.300003784, 0.600003357, 1.0 },
+      /* B */ { 0.150002046, 0.059997204, 1.0 }
+    };
+
+  cmsFloat64Number srgb_parameters[5] =
+    { 2.4, 1.0 / 1.055,  0.055 / 1.055, 1.0 / 12.92, 0.04045 };
+
+  cmsToneCurve *curve[3];
+
+  /* sRGB curve */
+  curve[0] = curve[1] = curve[2] = cmsBuildParametricToneCurve (NULL, 4,
+                                                                srgb_parameters);
+
+  profile = cmsCreateRGBProfile (&whitepoint, &primaries, curve);
+
+  cmsFreeToneCurve (curve[0]);
+
+  gimp_color_profile_set_tag (profile, cmsSigProfileDescriptionTag,
+                              "GIMP built-in sRGB");
+  gimp_color_profile_set_tag (profile, cmsSigDeviceMfgDescTag,
+                              "GIMP");
+  gimp_color_profile_set_tag (profile, cmsSigDeviceModelDescTag,
+                              "sRGB");
+  gimp_color_profile_set_tag (profile, cmsSigCopyrightTag,
+                              "Public Domain");
+
+  /* The following line produces a V2 profile with a point curve TRC.
+   * Profiles with point curve TRCs can't be used in LCMS2 unbounded
+   * mode ICC profile conversions. A V2 profile might be appropriate
+   * for embedding in sRGB images saved to disk, if the image is to be
+   * opened by an image editing application that doesn't understand V4
+   * profiles.
+   *
+   * cmsSetProfileVersion (srgb_profile, 2.1);
+   */
+
+  return profile;
+}
+
+/**
+ * gimp_color_profile_new_rgb_srgb:
+ *
+ * This function is a replacement for cmsCreate_sRGBProfile() and
+ * returns an sRGB profile that is functionally the same as the
+ * ArgyllCMS sRGB.icm profile. "Functionally the same" means it has
+ * the same red, green, and blue colorants and the V4 "chad"
+ * equivalent of the ArgyllCMS V2 white point. The profile TRC is also
+ * functionally equivalent to the ArgyllCMS sRGB.icm TRC and is the
+ * same as the LCMS sRGB built-in profile TRC.
+ *
+ * The actual primaries in the sRGB specification are
+ * red xy:   {0.6400, 0.3300, 1.0}
+ * green xy: {0.3000, 0.6000, 1.0}
+ * blue xy:  {0.1500, 0.0600, 1.0}
+ *
+ * The sRGB primaries given below are "pre-quantized" to compensate
+ * for hexadecimal quantization during the profile-making process.
+ * Unless the profile-making code compensates for this quantization,
+ * the resulting profile's red, green, and blue colorants will deviate
+ * slightly from the correct XYZ values.
+ *
+ * LCMS2 doesn't compensate for hexadecimal quantization. The
+ * "pre-quantized" primaries below were back-calculated from the
+ * ArgyllCMS sRGB.icm profile. The resulting sRGB profile's colorants
+ * exactly matches the ArgyllCMS sRGB.icm profile colorants.
+ *
+ * Return value: the sRGB #GimpColorProfile.
+ *
+ * Since: 2.10
+ **/
+GimpColorProfile *
+gimp_color_profile_new_rgb_srgb (void)
+{
+  static GimpColorProfile *profile = NULL;
+
+  const guint8 *data;
+  gsize         length;
+
+  if (G_UNLIKELY (profile == NULL))
+    {
+      cmsHPROFILE lcms_profile = gimp_color_profile_new_rgb_srgb_internal ();
+
+      profile = gimp_color_profile_new_from_lcms_profile (lcms_profile, NULL);
+
+      cmsCloseProfile (lcms_profile);
+    }
+
+  data = gimp_color_profile_get_icc_profile (profile, &length);
+
+  return gimp_color_profile_new_from_icc_profile (data, length, NULL);
+}
+
+static cmsHPROFILE
+gimp_color_profile_new_rgb_srgb_linear_internal (void)
+{
+  cmsHPROFILE profile;
+
+  /* white point is D65 from the sRGB specs */
+  cmsCIExyY whitepoint = { 0.3127, 0.3290, 1.0 };
+
+  /* primaries are ITU‐R BT.709‐5 (xYY), which are also the primaries
+   * from the sRGB specs, modified to properly account for hexadecimal
+   * quantization during the profile making process.
+   */
+  cmsCIExyYTRIPLE primaries =
+    {
+      /* R { 0.6400, 0.3300, 1.0 }, */
+      /* G { 0.3000, 0.6000, 1.0 }, */
+      /* B { 0.1500, 0.0600, 1.0 }  */
+      /* R */ { 0.639998686, 0.330010138, 1.0 },
+      /* G */ { 0.300003784, 0.600003357, 1.0 },
+      /* B */ { 0.150002046, 0.059997204, 1.0 }
+    };
+
+  cmsToneCurve *curve[3];
+
+  /* linear light */
+  curve[0] = curve[1] = curve[2] = cmsBuildGamma (NULL, 1.0);
+
+  profile = cmsCreateRGBProfile (&whitepoint, &primaries, curve);
+
+  cmsFreeToneCurve (curve[0]);
+
+  gimp_color_profile_set_tag (profile, cmsSigProfileDescriptionTag,
+                              "GIMP built-in Linear sRGB");
+  gimp_color_profile_set_tag (profile, cmsSigDeviceMfgDescTag,
+                              "GIMP");
+  gimp_color_profile_set_tag (profile, cmsSigDeviceModelDescTag,
+                              "Linear sRGB");
+  gimp_color_profile_set_tag (profile, cmsSigCopyrightTag,
+                              "Public Domain");
+
+  return profile;
+}
+
+/**
+ * gimp_color_profile_new_rgb_srgb_linear:
+ *
+ * This function creates a profile for babl_model("RGB"). Please
+ * somebody write something smarter here.
+ *
+ * Return value: the linear RGB #GimpColorProfile.
+ *
+ * Since: 2.10
+ **/
+GimpColorProfile *
+gimp_color_profile_new_rgb_srgb_linear (void)
+{
+  static GimpColorProfile *profile = NULL;
+
+  const guint8 *data;
+  gsize         length;
+
+  if (G_UNLIKELY (profile == NULL))
+    {
+      cmsHPROFILE lcms_profile = gimp_color_profile_new_rgb_srgb_linear_internal ();
+
+      profile = gimp_color_profile_new_from_lcms_profile (lcms_profile, NULL);
+
+      cmsCloseProfile (lcms_profile);
+    }
+
+  data = gimp_color_profile_get_icc_profile (profile, &length);
+
+  return gimp_color_profile_new_from_icc_profile (data, length, NULL);
+}
+
+static cmsHPROFILE *
+gimp_color_profile_new_rgb_adobe_internal (void)
+{
+  cmsHPROFILE profile;
+
+  /* white point is D65 from the sRGB specs */
+  cmsCIExyY whitepoint = { 0.3127, 0.3290, 1.0 };
+
+  /* AdobeRGB1998 and sRGB have the same white point.
+   *
+   * The primaries below are technically correct, but because of
+   * hexadecimal rounding these primaries don't make a profile that
+   * matches the original.
+   *
+   *  cmsCIExyYTRIPLE primaries = {
+   *    { 0.6400, 0.3300, 1.0 },
+   *    { 0.2100, 0.7100, 1.0 },
+   *    { 0.1500, 0.0600, 1.0 }
+   *  };
+   */
+  cmsCIExyYTRIPLE primaries =
+    {
+      { 0.639996511, 0.329996864, 1.0 },
+      { 0.210005295, 0.710004866, 1.0 },
+      { 0.149997606, 0.060003644, 1.0 }
+    };
+
+  cmsToneCurve *curve[3];
+
+  /* gamma 2.2 */
+  curve[0] = curve[1] = curve[2] = cmsBuildGamma (NULL, 2.19921875);
+
+  profile = cmsCreateRGBProfile (&whitepoint, &primaries, curve);
+
+  cmsFreeToneCurve (curve[0]);
+
+  gimp_color_profile_set_tag (profile, cmsSigProfileDescriptionTag,
+                              "Compatible with Adobe RGB (1998)");
+  gimp_color_profile_set_tag (profile, cmsSigDeviceMfgDescTag,
+                              "GIMP");
+  gimp_color_profile_set_tag (profile, cmsSigDeviceModelDescTag,
+                              "Compatible with Adobe RGB (1998)");
+  gimp_color_profile_set_tag (profile, cmsSigCopyrightTag,
+                              "Public Domain");
+
+  return profile;
+}
+
+/**
+ * gimp_color_profile_new_rgb_adobe:
+ *
+ * This function creates a profile compatible with AbobeRGB (1998).
+ *
+ * Return value: the AdobeRGB-compatible #GimpColorProfile.
+ *
+ * Since: 2.10
+ **/
+GimpColorProfile *
+gimp_color_profile_new_rgb_adobe (void)
+{
+  static GimpColorProfile *profile = NULL;
+
+  const guint8 *data;
+  gsize         length;
+
+  if (G_UNLIKELY (profile == NULL))
+    {
+      cmsHPROFILE lcms_profile = gimp_color_profile_new_rgb_adobe_internal ();
+
+      profile = gimp_color_profile_new_from_lcms_profile (lcms_profile, NULL);
+
+      cmsCloseProfile (lcms_profile);
+    }
+
+  data = gimp_color_profile_get_icc_profile (profile, &length);
+
+  return gimp_color_profile_new_from_icc_profile (data, length, NULL);
+}
+
+static cmsHPROFILE *
+gimp_color_profile_new_d65_gray_srgb_trc_internal (void)
+{
+  cmsHPROFILE profile;
+
+  /* white point is D65 from the sRGB specs */
+  cmsCIExyY whitepoint = { 0.3127, 0.3290, 1.0 };
+
+  cmsFloat64Number srgb_parameters[5] =
+    { 2.4, 1.0 / 1.055,  0.055 / 1.055, 1.0 / 12.92, 0.04045 };
+
+  cmsToneCurve *curve = cmsBuildParametricToneCurve (NULL, 4,
+                                                     srgb_parameters);
+
+  profile = cmsCreateGrayProfile (&whitepoint, curve);
+
+  cmsFreeToneCurve (curve);
+
+  gimp_color_profile_set_tag (profile, cmsSigProfileDescriptionTag,
+                              "GIMP built-in D65 Grayscale with sRGB TRC");
+  gimp_color_profile_set_tag (profile, cmsSigDeviceMfgDescTag,
+                              "GIMP");
+  gimp_color_profile_set_tag (profile, cmsSigDeviceModelDescTag,
+                              "D65 Grayscale with sRGB TRC");
+  gimp_color_profile_set_tag (profile, cmsSigCopyrightTag,
+                              "Public Domain");
+
+  return profile;
+}
+
+/**
+ * gimp_color_profile_new_d65_gray_srgb_trc
+ *
+ * This function creates a grayscale #GimpColorProfile with an
+ * sRGB TRC. See gimp_color_profile_new_rgb_srgb().
+ *
+ * Return value: the sRGB-gamma grayscale #GimpColorProfile.
+ *
+ * Since: 2.10
+ **/
+GimpColorProfile *
+gimp_color_profile_new_d65_gray_srgb_trc (void)
+{
+  static GimpColorProfile *profile = NULL;
+
+  const guint8 *data;
+  gsize         length;
+
+  if (G_UNLIKELY (profile == NULL))
+    {
+      cmsHPROFILE lcms_profile = gimp_color_profile_new_d65_gray_srgb_trc_internal ();
+
+      profile = gimp_color_profile_new_from_lcms_profile (lcms_profile, NULL);
+
+      cmsCloseProfile (lcms_profile);
+    }
+
+  data = gimp_color_profile_get_icc_profile (profile, &length);
+
+  return gimp_color_profile_new_from_icc_profile (data, length, NULL);
+}
+
+static cmsHPROFILE
+gimp_color_profile_new_d65_gray_linear_internal (void)
+{
+  cmsHPROFILE profile;
+
+  /* white point is D65 from the sRGB specs */
+  cmsCIExyY whitepoint = { 0.3127, 0.3290, 1.0 };
+
+  cmsToneCurve *curve = cmsBuildGamma (NULL, 1.0);
+
+  profile = cmsCreateGrayProfile (&whitepoint, curve);
+
+  cmsFreeToneCurve (curve);
+
+  gimp_color_profile_set_tag (profile, cmsSigProfileDescriptionTag,
+                              "GIMP built-in D65 Linear Grayscale");
+  gimp_color_profile_set_tag (profile, cmsSigDeviceMfgDescTag,
+                              "GIMP");
+  gimp_color_profile_set_tag (profile, cmsSigDeviceModelDescTag,
+                              "D65 Linear Grayscale");
+  gimp_color_profile_set_tag (profile, cmsSigCopyrightTag,
+                              "Public Domain");
+
+  return profile;
+}
+
+/**
+ * gimp_color_profile_new_d65_gray_srgb_gray:
+ *
+ * This function creates a profile for babl_model("Y"). Please
+ * somebody write something smarter here.
+ *
+ * Return value: the linear grayscale #GimpColorProfile.
+ *
+ * Since: 2.10
+ **/
+GimpColorProfile *
+gimp_color_profile_new_d65_gray_linear (void)
+{
+  static GimpColorProfile *profile = NULL;
+
+  const guint8 *data;
+  gsize         length;
+
+  if (G_UNLIKELY (profile == NULL))
+    {
+      cmsHPROFILE lcms_profile = gimp_color_profile_new_d65_gray_linear_internal ();
+
+      profile = gimp_color_profile_new_from_lcms_profile (lcms_profile, NULL);
+
+      cmsCloseProfile (lcms_profile);
+    }
+
+  data = gimp_color_profile_get_icc_profile (profile, &length);
+
+  return gimp_color_profile_new_from_icc_profile (data, length, NULL);
+}
+
+static cmsHPROFILE *
+gimp_color_profile_new_d50_gray_lab_trc_internal (void)
+{
+  cmsHPROFILE profile;
+
+  /* white point is D50 from the ICC profile illuminant specs */
+  cmsCIExyY whitepoint = {0.345702915, 0.358538597, 1.0};
+
+  cmsFloat64Number lab_parameters[5] =
+    { 3.0, 1.0 / 1.16,  0.16 / 1.16, 2700.0 / 24389.0, 0.08000  };
+
+  cmsToneCurve *curve = cmsBuildParametricToneCurve (NULL, 4,
+                                                     lab_parameters);
+
+  profile = cmsCreateGrayProfile (&whitepoint, curve);
+
+  cmsFreeToneCurve (curve);
+
+  gimp_color_profile_set_tag (profile, cmsSigProfileDescriptionTag,
+                              "GIMP built-in D50 Grayscale with LAB L TRC");
+  gimp_color_profile_set_tag (profile, cmsSigDeviceMfgDescTag,
+                              "GIMP");
+  gimp_color_profile_set_tag (profile, cmsSigDeviceModelDescTag,
+                              "D50 Grayscale with LAB L TRC");
+  gimp_color_profile_set_tag (profile, cmsSigCopyrightTag,
+                              "Public Domain");
+
+  return profile;
+}
+
+
+/**
+ * gimp_color_profile_new_d50_gray_lab_trc
+ *
+ * This function creates a grayscale #GimpColorProfile with the
+ * D50 ICC profile illuminant as the profile white point and the
+ * LAB companding curve as the TRC.
+ *
+ * Return value: a gray profile with the D50 ICC profile illuminant
+ * as the profile white point and the LAB companding curve as the TRC.
+ * as the TRC.
+ *
+ * Since: 2.10
+ **/
+GimpColorProfile *
+gimp_color_profile_new_d50_gray_lab_trc (void)
+{
+  static GimpColorProfile *profile = NULL;
+
+  const guint8 *data;
+  gsize         length;
+
+  if (G_UNLIKELY (profile == NULL))
+    {
+      cmsHPROFILE lcms_profile = gimp_color_profile_new_d50_gray_lab_trc_internal ();
+
+      profile = gimp_color_profile_new_from_lcms_profile (lcms_profile, NULL);
+
+      cmsCloseProfile (lcms_profile);
+    }
+
+  data = gimp_color_profile_get_icc_profile (profile, &length);
+
+  return gimp_color_profile_new_from_icc_profile (data, length, NULL);
+}
+
+/**
+ * gimp_color_profile_get_space:
+ * @profile: a #GimpColorProfile
+ * @intent:  a #GimpColorRenderingIntent
+ * @error:   return location for #GError
+ *
+ * This function returns the #Babl space of @profile, for the
+ * specified @intent.
+ *
+ * Return value: the new #Babl space.
+ *
+ * Since: 2.10.6
+ **/
+const Babl *
+gimp_color_profile_get_space (GimpColorProfile          *profile,
+                              GimpColorRenderingIntent   intent,
+                              GError                   **error)
+{
+  const Babl  *space;
+  const gchar *babl_error = NULL;
+
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+  g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+  space = babl_icc_make_space ((const gchar *) profile->priv->data,
+                               profile->priv->length,
+                               (BablIccIntent) intent,
+                               &babl_error);
+
+  if (! space)
+    g_set_error (error, GIMP_COLOR_PROFILE_ERROR, 0,
+                 "%s: %s",
+                 gimp_color_profile_get_label (profile), babl_error);
+
+  return space;
+}
+
+/**
+ * gimp_color_profile_get_format:
+ * @profile: a #GimpColorProfile
+ * @format:  a #Babl format
+ * @intent:  a #GimpColorRenderingIntent
+ * @error:   return location for #GError
+ *
+ * This function takes a #GimpColorProfile and a #Babl format and
+ * returns a new #Babl format with @profile's RGB primaries and TRC,
+ * and @format's pixel layout.
+ *
+ * Return value: the new #Babl format.
+ *
+ * Since: 2.10
+ **/
+const Babl *
+gimp_color_profile_get_format (GimpColorProfile          *profile,
+                               const Babl                *format,
+                               GimpColorRenderingIntent   intent,
+                               GError                   **error)
+{
+  const Babl *space;
+
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (profile), NULL);
+  g_return_val_if_fail (format != NULL, NULL);
+  g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+  space = gimp_color_profile_get_space (profile, intent, error);
+
+  if (! space)
+    return NULL;
+
+  return babl_format_with_space (babl_get_name (format), space);
+}
+
+/**
+ * gimp_color_profile_get_lcms_format:
+ * @format:      a #Babl format
+ * @lcms_format: return location for an lcms format
+ *
+ * This function takes a #Babl format and returns the lcms format to
+ * be used with that @format. It also returns a #Babl format to be
+ * used instead of the passed @format, which usually is the same as
+ * @format, unless lcms doesn't support @format.
+ *
+ * Note that this function currently only supports RGB, RGBA, R'G'B',
+ * R'G'B'A, Y, YA, Y', Y'A and the cairo-RGB24 and cairo-ARGB32 formats.
+ *
+ * Return value: the #Babl format to be used instead of @format, or %NULL
+ *               if the passed @format is not supported at all.
+ *
+ * Since: 2.10
+ **/
+const Babl *
+gimp_color_profile_get_lcms_format (const Babl *format,
+                                    guint32    *lcms_format)
+{
+  const Babl *output_format = NULL;
+  const Babl *type;
+  const Babl *model;
+  gboolean    has_alpha;
+  gboolean    rgb    = FALSE;
+  gboolean    gray   = FALSE;
+  gboolean    cmyk   = FALSE;
+  gboolean    linear = FALSE;
+
+  g_return_val_if_fail (format != NULL, NULL);
+  g_return_val_if_fail (lcms_format != NULL, NULL);
+
+  has_alpha = babl_format_has_alpha (format);
+  type      = babl_format_get_type (format, 0);
+  model     = babl_format_get_model (format);
+
+  if (format == babl_format ("cairo-RGB24"))
+    {
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+      *lcms_format = TYPE_BGRA_8;
+#else
+      *lcms_format = TYPE_ARGB_8;
+#endif
+
+      return format;
+    }
+  else if (format == babl_format ("cairo-ARGB32"))
+    {
+      rgb = TRUE;
+    }
+  else if (model == babl_model ("RGB")  ||
+           model == babl_model ("RGBA") ||
+           model == babl_model ("RaGaBaA"))
+    {
+      rgb    = TRUE;
+      linear = TRUE;
+    }
+  else if (model == babl_model ("R'G'B'")  ||
+           model == babl_model ("R'G'B'A") ||
+           model == babl_model ("R'aG'aB'aA"))
+    {
+      rgb = TRUE;
+    }
+  else if (model == babl_model ("Y")  ||
+           model == babl_model ("YA") ||
+           model == babl_model ("YaA"))
+    {
+      gray   = TRUE;
+      linear = TRUE;
+    }
+  else if (model == babl_model ("Y'")  ||
+           model == babl_model ("Y'A") ||
+           model == babl_model ("Y'aA"))
+    {
+      gray = TRUE;
+    }
+  else if (model == babl_model ("CMYK"))
+#if 0
+    /* FIXME missing from babl */
+           || model == babl_model ("CMYKA"))
+#endif
+    {
+      cmyk = TRUE;
+    }
+  else if (model == babl_model ("CIE Lab")       ||
+           model == babl_model ("CIE Lab alpha") ||
+           model == babl_model ("CIE LCH(ab)")   ||
+           model == babl_model ("CIE LCH(ab) alpha"))
+    {
+      if (has_alpha)
+        {
+          *lcms_format = TYPE_RGBA_FLT;
+
+          return babl_format ("RGBA float");
+        }
+      else
+        {
+          *lcms_format = TYPE_RGB_FLT;
+
+          return babl_format ("RGB float");
+        }
+    }
+  else if (babl_format_is_palette (format))
+    {
+      if (has_alpha)
+        {
+          *lcms_format = TYPE_RGBA_8;
+
+          return babl_format ("R'G'B'A u8");
+        }
+      else
+        {
+          *lcms_format = TYPE_RGB_8;
+
+          return babl_format ("R'G'B' u8");
+        }
+    }
+  else
+    {
+      g_printerr ("format not supported: %s\n"
+                  "has_alpha = %s\n"
+                  "type = %s\n"
+                  "model = %s\n",
+                  babl_get_name (format),
+                  has_alpha ? "TRUE" : "FALSE",
+                  babl_get_name (type),
+                  babl_get_name (model));
+      g_return_val_if_reached (NULL);
+    }
+
+  *lcms_format = 0;
+
+  #define FIND_FORMAT_FOR_TYPE(babl_t, lcms_t)                                 \
+    do                                                                         \
+      {                                                                        \
+        if (has_alpha)                                                         \
+          {                                                                    \
+            if (rgb)                                                           \
+              {                                                                \
+                *lcms_format = TYPE_RGBA_##lcms_t;                             \
+                                                                               \
+                if (linear)                                                    \
+                  output_format = babl_format ("RGBA " babl_t);                \
+                else                                                           \
+                  output_format = babl_format ("R'G'B'A " babl_t);             \
+              }                                                                \
+            else if (gray)                                                     \
+              {                                                                \
+                *lcms_format = TYPE_GRAYA_##lcms_t;                            \
+                                                                               \
+                if (linear)                                                    \
+                  output_format = babl_format ("YA " babl_t);                  \
+                else                                                           \
+                  output_format = babl_format ("Y'A " babl_t);                 \
+              }                                                                \
+            else if (cmyk)                                                     \
+              {                                                                \
+                *lcms_format = TYPE_CMYKA_##lcms_t;                            \
+                                                                               \
+                output_format = format;                                        \
+              }                                                                \
+          }                                                                    \
+        else                                                                   \
+          {                                                                    \
+            if (rgb)                                                           \
+              {                                                                \
+                *lcms_format = TYPE_RGB_##lcms_t;                              \
+                                                                               \
+                if (linear)                                                    \
+                  output_format = babl_format ("RGB " babl_t);                 \
+                else                                                           \
+                  output_format = babl_format ("R'G'B' " babl_t);              \
+              }                                                                \
+            else if (gray)                                                     \
+              {                                                                \
+                *lcms_format = TYPE_GRAY_##lcms_t;                             \
+                                                                               \
+                if (linear)                                                    \
+                  output_format = babl_format ("Y " babl_t);                   \
+                else                                                           \
+                  output_format = babl_format ("Y' " babl_t);                  \
+              }                                                                \
+            else if (cmyk)                                                     \
+              {                                                                \
+                *lcms_format = TYPE_CMYK_##lcms_t;                             \
+                                                                               \
+                output_format = format;                                        \
+              }                                                                \
+          }                                                                    \
+      }                                                                        \
+    while (FALSE)
+
+  if (type == babl_type ("u8"))
+    FIND_FORMAT_FOR_TYPE ("u8", 8);
+  else if (type == babl_type ("u16"))
+    FIND_FORMAT_FOR_TYPE ("u16", 16);
+  else if (type == babl_type ("half")) /* 16-bit floating point (half) */
+    FIND_FORMAT_FOR_TYPE ("half", HALF_FLT);
+  else if (type == babl_type ("float"))
+    FIND_FORMAT_FOR_TYPE ("float", FLT);
+  else if (type == babl_type ("double"))
+    FIND_FORMAT_FOR_TYPE ("double", DBL);
+
+  if (*lcms_format == 0)
+    {
+      g_printerr ("%s: format %s not supported, "
+                  "falling back to float\n",
+                  G_STRFUNC, babl_get_name (format));
+
+      rgb = ! gray;
+
+      FIND_FORMAT_FOR_TYPE ("float", FLT);
+
+      g_return_val_if_fail (output_format != NULL, NULL);
+    }
+
+  #undef FIND_FORMAT_FOR_TYPE
+
+  return output_format;
+}
diff --git a/libgimpcolor/gimpcolorprofile.h b/libgimpcolor/gimpcolorprofile.h
new file mode 100644
index 0000000..c09470b
--- /dev/null
+++ b/libgimpcolor/gimpcolorprofile.h
@@ -0,0 +1,128 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * gimpcolorprofile.h
+ * Copyright (C) 2014  Michael Natterer <mitch@gimp.org>
+ *                     Elle Stone <ellestone@ninedegreesbelow.com>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_COLOR_H_INSIDE__) && !defined (GIMP_COLOR_COMPILATION)
+#error "Only <libgimpcolor/gimpcolor.h> can be included directly."
+#endif
+
+#ifndef __GIMP_COLOR_PROFILE_H__
+#define __GIMP_COLOR_PROFILE_H__
+
+G_BEGIN_DECLS
+
+/* For information look into the C source or the html documentation */
+
+
+#define GIMP_TYPE_COLOR_PROFILE            (gimp_color_profile_get_type ())
+#define GIMP_COLOR_PROFILE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_COLOR_PROFILE, GimpColorProfile))
+#define GIMP_COLOR_PROFILE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_COLOR_PROFILE, GimpColorProfileClass))
+#define GIMP_IS_COLOR_PROFILE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_COLOR_PROFILE))
+#define GIMP_IS_COLOR_PROFILE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_COLOR_PROFILE))
+#define GIMP_COLOR_PROFILE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_COLOR_PROFILE, GimpColorProfileClass))
+
+
+typedef struct _GimpColorProfileClass   GimpColorProfileClass;
+typedef struct _GimpColorProfilePrivate GimpColorProfilePrivate;
+
+struct _GimpColorProfile
+{
+  GObject                  parent_instance;
+
+  GimpColorProfilePrivate *priv;
+};
+
+struct _GimpColorProfileClass
+{
+  GObjectClass  parent_class;
+
+  /* Padding for future expansion */
+  void (* _gimp_reserved1) (void);
+  void (* _gimp_reserved2) (void);
+  void (* _gimp_reserved3) (void);
+  void (* _gimp_reserved4) (void);
+};
+
+
+GType              gimp_color_profile_get_type              (void) G_GNUC_CONST;
+
+GimpColorProfile * gimp_color_profile_new_rgb_srgb          (void);
+GimpColorProfile * gimp_color_profile_new_rgb_srgb_linear   (void);
+GimpColorProfile * gimp_color_profile_new_rgb_adobe         (void);
+
+GimpColorProfile * gimp_color_profile_new_d65_gray_srgb_trc (void);
+GimpColorProfile * gimp_color_profile_new_d65_gray_linear   (void);
+GimpColorProfile * gimp_color_profile_new_d50_gray_lab_trc  (void);
+
+GimpColorProfile *
+       gimp_color_profile_new_srgb_trc_from_color_profile   (GimpColorProfile  *profile);
+GimpColorProfile *
+       gimp_color_profile_new_linear_from_color_profile     (GimpColorProfile  *profile);
+
+GimpColorProfile * gimp_color_profile_new_from_file         (GFile             *file,
+                                                             GError           **error);
+
+GimpColorProfile * gimp_color_profile_new_from_icc_profile  (const guint8      *data,
+                                                             gsize              length,
+                                                             GError           **error);
+GimpColorProfile * gimp_color_profile_new_from_lcms_profile (gpointer           lcms_profile,
+                                                             GError           **error);
+
+gboolean           gimp_color_profile_save_to_file          (GimpColorProfile  *profile,
+                                                             GFile             *file,
+                                                             GError           **error);
+
+const guint8     * gimp_color_profile_get_icc_profile       (GimpColorProfile  *profile,
+                                                             gsize             *length);
+gpointer           gimp_color_profile_get_lcms_profile      (GimpColorProfile  *profile);
+
+const gchar      * gimp_color_profile_get_description       (GimpColorProfile  *profile);
+const gchar      * gimp_color_profile_get_manufacturer      (GimpColorProfile  *profile);
+const gchar      * gimp_color_profile_get_model             (GimpColorProfile  *profile);
+const gchar      * gimp_color_profile_get_copyright         (GimpColorProfile  *profile);
+
+const gchar      * gimp_color_profile_get_label             (GimpColorProfile  *profile);
+const gchar      * gimp_color_profile_get_summary           (GimpColorProfile  *profile);
+
+gboolean           gimp_color_profile_is_equal              (GimpColorProfile  *profile1,
+                                                             GimpColorProfile  *profile2);
+
+gboolean           gimp_color_profile_is_rgb                (GimpColorProfile  *profile);
+gboolean           gimp_color_profile_is_gray               (GimpColorProfile  *profile);
+gboolean           gimp_color_profile_is_cmyk               (GimpColorProfile  *profile);
+
+gboolean           gimp_color_profile_is_linear             (GimpColorProfile  *profile);
+
+const Babl       * gimp_color_profile_get_space             (GimpColorProfile  *profile,
+                                                             GimpColorRenderingIntent intent,
+                                                             GError           **error);
+const Babl       * gimp_color_profile_get_format            (GimpColorProfile  *profile,
+                                                             const Babl        *format,
+                                                             GimpColorRenderingIntent intent,
+                                                             GError           **error);
+
+const Babl       * gimp_color_profile_get_lcms_format       (const Babl        *format,
+                                                             guint32           *lcms_format);
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_COLOR_PROFILE_H__ */
diff --git a/libgimpcolor/gimpcolorspace.c b/libgimpcolor/gimpcolorspace.c
new file mode 100644
index 0000000..b8885ce
--- /dev/null
+++ b/libgimpcolor/gimpcolorspace.c
@@ -0,0 +1,1103 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <babl/babl.h>
+#include <glib-object.h>
+
+#include "libgimpmath/gimpmath.h"
+
+#include "gimpcolortypes.h"
+
+#include "gimpcolorspace.h"
+#include "gimprgb.h"
+#include "gimphsv.h"
+
+
+
+/**
+ * SECTION: gimpcolorspace
+ * @title: GimpColorSpace
+ * @short_description: Utility functions which convert colors between
+ *                     different color models.
+ *
+ * When programming pixel data manipulation functions you will often
+ * use algorithms operating on a color model different from the one
+ * GIMP uses.  This file provides utility functions to convert colors
+ * between different color spaces.
+ **/
+
+
+#define GIMP_HSV_UNDEFINED -1.0
+#define GIMP_HSL_UNDEFINED -1.0
+
+/*********************************
+ *   color conversion routines   *
+ *********************************/
+
+
+/*  GimpRGB functions  */
+
+
+/**
+ * gimp_rgb_to_hsv:
+ * @rgb: A color value in the RGB colorspace
+ * @hsv: The value converted to the HSV colorspace
+ *
+ * Does a conversion from RGB to HSV (Hue, Saturation,
+ * Value) colorspace.
+ **/
+void
+gimp_rgb_to_hsv (const GimpRGB *rgb,
+                 GimpHSV       *hsv)
+{
+  gdouble max, min, delta;
+
+  g_return_if_fail (rgb != NULL);
+  g_return_if_fail (hsv != NULL);
+
+  max = gimp_rgb_max (rgb);
+  min = gimp_rgb_min (rgb);
+
+  hsv->v = max;
+  delta = max - min;
+
+  if (delta > 0.0001)
+    {
+      hsv->s = delta / max;
+
+      if (rgb->r == max)
+        {
+          hsv->h = (rgb->g - rgb->b) / delta;
+          if (hsv->h < 0.0)
+            hsv->h += 6.0;
+        }
+      else if (rgb->g == max)
+        {
+          hsv->h = 2.0 + (rgb->b - rgb->r) / delta;
+        }
+      else
+        {
+          hsv->h = 4.0 + (rgb->r - rgb->g) / delta;
+        }
+
+      hsv->h /= 6.0;
+    }
+  else
+    {
+      hsv->s = 0.0;
+      hsv->h = 0.0;
+    }
+
+  hsv->a = rgb->a;
+}
+
+/**
+ * gimp_hsv_to_rgb:
+ * @hsv: A color value in the HSV colorspace
+ * @rgb: The returned RGB value.
+ *
+ * Converts a color value from HSV to RGB colorspace
+ **/
+void
+gimp_hsv_to_rgb (const GimpHSV *hsv,
+                 GimpRGB       *rgb)
+{
+  gint    i;
+  gdouble f, w, q, t;
+
+  gdouble hue;
+
+  g_return_if_fail (rgb != NULL);
+  g_return_if_fail (hsv != NULL);
+
+  if (hsv->s == 0.0)
+    {
+      rgb->r = hsv->v;
+      rgb->g = hsv->v;
+      rgb->b = hsv->v;
+    }
+  else
+    {
+      hue = hsv->h;
+
+      if (hue == 1.0)
+        hue = 0.0;
+
+      hue *= 6.0;
+
+      i = (gint) hue;
+      f = hue - i;
+      w = hsv->v * (1.0 - hsv->s);
+      q = hsv->v * (1.0 - (hsv->s * f));
+      t = hsv->v * (1.0 - (hsv->s * (1.0 - f)));
+
+      switch (i)
+        {
+        case 0:
+          rgb->r = hsv->v;
+          rgb->g = t;
+          rgb->b = w;
+          break;
+        case 1:
+          rgb->r = q;
+          rgb->g = hsv->v;
+          rgb->b = w;
+          break;
+        case 2:
+          rgb->r = w;
+          rgb->g = hsv->v;
+          rgb->b = t;
+          break;
+        case 3:
+          rgb->r = w;
+          rgb->g = q;
+          rgb->b = hsv->v;
+          break;
+        case 4:
+          rgb->r = t;
+          rgb->g = w;
+          rgb->b = hsv->v;
+          break;
+        case 5:
+          rgb->r = hsv->v;
+          rgb->g = w;
+          rgb->b = q;
+          break;
+        }
+    }
+
+  rgb->a = hsv->a;
+}
+
+
+/**
+ * gimp_rgb_to_hsl:
+ * @rgb: A color value in the RGB colorspace
+ * @hsl: The value converted to HSL
+ *
+ * Convert an RGB color value to a HSL (Hue, Saturation, Lightness)
+ * color value.
+ **/
+void
+gimp_rgb_to_hsl (const GimpRGB *rgb,
+                 GimpHSL       *hsl)
+{
+  gdouble max, min, delta;
+
+  g_return_if_fail (rgb != NULL);
+  g_return_if_fail (hsl != NULL);
+
+  max = gimp_rgb_max (rgb);
+  min = gimp_rgb_min (rgb);
+
+  hsl->l = (max + min) / 2.0;
+
+  if (max == min)
+    {
+      hsl->s = 0.0;
+      hsl->h = GIMP_HSL_UNDEFINED;
+    }
+  else
+    {
+      if (hsl->l <= 0.5)
+        hsl->s = (max - min) / (max + min);
+      else
+        hsl->s = (max - min) / (2.0 - max - min);
+
+      delta = max - min;
+
+      if (delta == 0.0)
+        delta = 1.0;
+
+      if (rgb->r == max)
+        {
+          hsl->h = (rgb->g - rgb->b) / delta;
+        }
+      else if (rgb->g == max)
+        {
+          hsl->h = 2.0 + (rgb->b - rgb->r) / delta;
+        }
+      else
+        {
+          hsl->h = 4.0 + (rgb->r - rgb->g) / delta;
+        }
+
+      hsl->h /= 6.0;
+
+      if (hsl->h < 0.0)
+        hsl->h += 1.0;
+    }
+
+  hsl->a = rgb->a;
+}
+
+static inline gdouble
+gimp_hsl_value (gdouble n1,
+                gdouble n2,
+                gdouble hue)
+{
+  gdouble val;
+
+  if (hue > 6.0)
+    hue -= 6.0;
+  else if (hue < 0.0)
+    hue += 6.0;
+
+  if (hue < 1.0)
+    val = n1 + (n2 - n1) * hue;
+  else if (hue < 3.0)
+    val = n2;
+  else if (hue < 4.0)
+    val = n1 + (n2 - n1) * (4.0 - hue);
+  else
+    val = n1;
+
+  return val;
+}
+
+
+/**
+ * gimp_hsl_to_rgb:
+ * @hsl: A color value in the HSL colorspace
+ * @rgb: The value converted to a value in the RGB colorspace
+ *
+ * Convert a HSL color value to an RGB color value.
+ **/
+void
+gimp_hsl_to_rgb (const GimpHSL *hsl,
+                 GimpRGB       *rgb)
+{
+  g_return_if_fail (hsl != NULL);
+  g_return_if_fail (rgb != NULL);
+
+  if (hsl->s == 0)
+    {
+      /*  achromatic case  */
+      rgb->r = hsl->l;
+      rgb->g = hsl->l;
+      rgb->b = hsl->l;
+    }
+  else
+    {
+      gdouble m1, m2;
+
+      if (hsl->l <= 0.5)
+        m2 = hsl->l * (1.0 + hsl->s);
+      else
+        m2 = hsl->l + hsl->s - hsl->l * hsl->s;
+
+      m1 = 2.0 * hsl->l - m2;
+
+      rgb->r = gimp_hsl_value (m1, m2, hsl->h * 6.0 + 2.0);
+      rgb->g = gimp_hsl_value (m1, m2, hsl->h * 6.0);
+      rgb->b = gimp_hsl_value (m1, m2, hsl->h * 6.0 - 2.0);
+    }
+
+  rgb->a = hsl->a;
+}
+
+
+/**
+ * gimp_rgb_to_cmyk:
+ * @rgb: A value in the RGB colorspace
+ * @pullout: A scaling value (0-1) indicating how much black should be
+ *           pulled out
+ * @cmyk: The input value naively converted to the CMYK colorspace
+ *
+ * Does a naive conversion from RGB to CMYK colorspace. A simple
+ * formula that doesn't take any color-profiles into account is used.
+ * The amount of black pullout how can be controlled via the @pullout
+ * parameter. A @pullout value of 0 makes this a conversion to CMY.
+ * A value of 1 causes the maximum amount of black to be pulled out.
+ **/
+void
+gimp_rgb_to_cmyk (const GimpRGB  *rgb,
+                  gdouble         pullout,
+                  GimpCMYK       *cmyk)
+{
+  gdouble c, m, y, k;
+
+  g_return_if_fail (rgb != NULL);
+  g_return_if_fail (cmyk != NULL);
+
+  c = 1.0 - rgb->r;
+  m = 1.0 - rgb->g;
+  y = 1.0 - rgb->b;
+
+  k = 1.0;
+  if (c < k)  k = c;
+  if (m < k)  k = m;
+  if (y < k)  k = y;
+
+  k *= pullout;
+
+  if (k < 1.0)
+    {
+      cmyk->c = (c - k) / (1.0 - k);
+      cmyk->m = (m - k) / (1.0 - k);
+      cmyk->y = (y - k) / (1.0 - k);
+    }
+  else
+    {
+      cmyk->c = 0.0;
+      cmyk->m = 0.0;
+      cmyk->y = 0.0;
+    }
+
+  cmyk->k = k;
+  cmyk->a = rgb->a;
+}
+
+/**
+ * gimp_cmyk_to_rgb:
+ * @cmyk: A color value in the CMYK colorspace
+ * @rgb: The value converted to the RGB colorspace
+ *
+ * Does a simple transformation from the CMYK colorspace to the RGB
+ * colorspace, without taking color profiles into account.
+ **/
+void
+gimp_cmyk_to_rgb (const GimpCMYK *cmyk,
+                  GimpRGB        *rgb)
+{
+  gdouble c, m, y, k;
+
+  g_return_if_fail (cmyk != NULL);
+  g_return_if_fail (rgb != NULL);
+
+  k = cmyk->k;
+
+  if (k < 1.0)
+    {
+      c = cmyk->c * (1.0 - k) + k;
+      m = cmyk->m * (1.0 - k) + k;
+      y = cmyk->y * (1.0 - k) + k;
+    }
+  else
+    {
+      c = 1.0;
+      m = 1.0;
+      y = 1.0;
+    }
+
+  rgb->r = 1.0 - c;
+  rgb->g = 1.0 - m;
+  rgb->b = 1.0 - y;
+  rgb->a = cmyk->a;
+}
+
+
+#define GIMP_RETURN_RGB(x, y, z) { rgb->r = x; rgb->g = y; rgb->b = z; return; }
+
+/****************************************************************************
+ * Theoretically, hue 0 (pure red) is identical to hue 6 in these transforms.
+ * Pure red always maps to 6 in this implementation. Therefore UNDEFINED can
+ * be defined as 0 in situations where only unsigned numbers are desired.
+ ****************************************************************************/
+
+/**
+ * gimp_rgb_to_hwb:
+ * @rgb: A color value in the RGB colorspace
+ * @hue: The hue value of the above color, in the range 0 to 6
+ * @whiteness: The whiteness value of the above color, in the range 0 to 1
+ * @blackness: The blackness value of the above color, in the range 0 to 1
+ *
+ * Theoretically, hue 0 (pure red) is identical to hue 6 in these transforms.
+ * Pure red always maps to 6 in this implementation. Therefore UNDEFINED can
+ * be defined as 0 in situations where only unsigned numbers are desired.
+ *
+ * RGB are each on [0, 1]. Whiteness and Blackness are returned in the
+ * range [0, 1] and H is returned in the range [0, 6]. If W == 1 - B, H is
+ * undefined.
+ **/
+void
+gimp_rgb_to_hwb (const GimpRGB *rgb,
+                 gdouble       *hue,
+                 gdouble       *whiteness,
+                 gdouble       *blackness)
+{
+  /* RGB are each on [0, 1]. W and B are returned on [0, 1] and H is        */
+  /* returned on [0, 6]. Exception: H is returned UNDEFINED if W ==  1 - B. */
+  /* ====================================================================== */
+
+  gdouble R = rgb->r, G = rgb->g, B = rgb->b, w, v, b, f;
+  gint i;
+
+  w = gimp_rgb_min (rgb);
+  v = gimp_rgb_max (rgb);
+  b = 1.0 - v;
+
+  if (v == w)
+    {
+      *hue = GIMP_HSV_UNDEFINED;
+      *whiteness = w;
+      *blackness = b;
+    }
+  else
+    {
+      f = (R == w) ? G - B : ((G == w) ? B - R : R - G);
+      i = (R == w) ? 3.0 : ((G == w) ? 5.0 : 1.0);
+
+      *hue = (360.0 / 6.0) * (i - f / (v - w));
+      *whiteness = w;
+      *blackness = b;
+    }
+}
+
+/**
+ * gimp_hwb_to_rgb:
+ * @hue: A hue value, in the range 0 to 6
+ * @whiteness: A whiteness value, in the range 0 to 1
+ * @blackness: A blackness value, in the range 0 to 1
+ * @rgb: The above color converted to the RGB colorspace
+ *
+ * H is defined in the range [0, 6] or UNDEFINED, B and W are both in the
+ * range [0, 1]. The returned RGB values are all in the range [0, 1].
+ **/
+void
+gimp_hwb_to_rgb (gdouble  hue,
+                 gdouble  whiteness,
+                 gdouble  blackness,
+                 GimpRGB *rgb)
+{
+  /* H is given on [0, 6] or UNDEFINED. whiteness and
+   * blackness are given on [0, 1].
+   * RGB are each returned on [0, 1].
+   */
+
+  gdouble h = hue, w = whiteness, b = blackness, v, n, f;
+  gint    i;
+
+  h = 6.0 * h/ 360.0;
+
+  v = 1.0 - b;
+  if (h == GIMP_HSV_UNDEFINED)
+    {
+      rgb->r = v;
+      rgb->g = v;
+      rgb->b = v;
+    }
+  else
+    {
+      i = floor (h);
+      f = h - i;
+
+      if (i & 1)
+        f = 1.0 - f;  /* if i is odd */
+
+      n = w + f * (v - w);     /* linear interpolation between w and v */
+
+      switch (i)
+        {
+          case 6:
+          case 0: GIMP_RETURN_RGB (v, n, w);
+            break;
+          case 1: GIMP_RETURN_RGB (n, v, w);
+            break;
+          case 2: GIMP_RETURN_RGB (w, v, n);
+            break;
+          case 3: GIMP_RETURN_RGB (w, n, v);
+            break;
+          case 4: GIMP_RETURN_RGB (n, w, v);
+            break;
+          case 5: GIMP_RETURN_RGB (v, w, n);
+            break;
+        }
+    }
+
+}
+
+
+/*  gint functions  */
+
+/**
+ * gimp_rgb_to_hsv_int:
+ * @red: The red channel value, returns the Hue channel
+ * @green: The green channel value, returns the Saturation channel
+ * @blue: The blue channel value, returns the Value channel
+ *
+ * The arguments are pointers to int representing channel values in
+ * the RGB colorspace, and the values pointed to are all in the range
+ * [0, 255].
+ *
+ * The function changes the arguments to point to the HSV value
+ * corresponding, with the returned values in the following
+ * ranges: H [0, 359], S [0, 255], V [0, 255].
+ **/
+void
+gimp_rgb_to_hsv_int (gint *red,
+                     gint *green,
+                     gint *blue)
+{
+  gdouble  r, g, b;
+  gdouble  h, s, v;
+  gint     min;
+  gdouble  delta;
+
+  r = *red;
+  g = *green;
+  b = *blue;
+
+  if (r > g)
+    {
+      v = MAX (r, b);
+      min = MIN (g, b);
+    }
+  else
+    {
+      v = MAX (g, b);
+      min = MIN (r, b);
+    }
+
+  delta = v - min;
+
+  if (v == 0.0)
+    s = 0.0;
+  else
+    s = delta / v;
+
+  if (s == 0.0)
+    {
+      h = 0.0;
+    }
+  else
+    {
+      if (r == v)
+        h = 60.0 * (g - b) / delta;
+      else if (g == v)
+        h = 120 + 60.0 * (b - r) / delta;
+      else
+        h = 240 + 60.0 * (r - g) / delta;
+
+      if (h < 0.0)
+        h += 360.0;
+
+      if (h > 360.0)
+        h -= 360.0;
+    }
+
+  *red   = ROUND (h);
+  *green = ROUND (s * 255.0);
+  *blue  = ROUND (v);
+
+  /* avoid the ambiguity of returning different values for the same color */
+  if (*red == 360)
+    *red = 0;
+}
+
+/**
+ * gimp_hsv_to_rgb_int:
+ * @hue: The hue channel, returns the red channel
+ * @saturation: The saturation channel, returns the green channel
+ * @value: The value channel, returns the blue channel
+ *
+ * The arguments are pointers to int, with the values pointed to in the
+ * following ranges:  H [0, 360], S [0, 255], V [0, 255].
+ *
+ * The function changes the arguments to point to the RGB value
+ * corresponding, with the returned values all in the range [0, 255].
+ **/
+void
+gimp_hsv_to_rgb_int (gint *hue,
+                     gint *saturation,
+                     gint *value)
+{
+  gdouble h, s, v, h_temp;
+  gdouble f, p, q, t;
+  gint i;
+
+  if (*saturation == 0)
+    {
+      *hue        = *value;
+      *saturation = *value;
+      *value      = *value;
+    }
+  else
+    {
+      h = *hue;
+      s = *saturation / 255.0;
+      v = *value      / 255.0;
+
+      if (h == 360)
+        h_temp = 0;
+      else
+        h_temp = h;
+
+      h_temp = h_temp / 60.0;
+      i = floor (h_temp);
+      f = h_temp - i;
+      p = v * (1.0 - s);
+      q = v * (1.0 - (s * f));
+      t = v * (1.0 - (s * (1.0 - f)));
+
+      switch (i)
+        {
+        case 0:
+          *hue        = ROUND (v * 255.0);
+          *saturation = ROUND (t * 255.0);
+          *value      = ROUND (p * 255.0);
+          break;
+
+        case 1:
+          *hue        = ROUND (q * 255.0);
+          *saturation = ROUND (v * 255.0);
+          *value      = ROUND (p * 255.0);
+          break;
+
+        case 2:
+          *hue        = ROUND (p * 255.0);
+          *saturation = ROUND (v * 255.0);
+          *value      = ROUND (t * 255.0);
+          break;
+
+        case 3:
+          *hue        = ROUND (p * 255.0);
+          *saturation = ROUND (q * 255.0);
+          *value      = ROUND (v * 255.0);
+          break;
+
+        case 4:
+          *hue        = ROUND (t * 255.0);
+          *saturation = ROUND (p * 255.0);
+          *value      = ROUND (v * 255.0);
+          break;
+
+        case 5:
+          *hue        = ROUND (v * 255.0);
+          *saturation = ROUND (p * 255.0);
+          *value      = ROUND (q * 255.0);
+          break;
+        }
+    }
+}
+
+/**
+ * gimp_rgb_to_hsl_int:
+ * @red: Red channel, returns Hue channel
+ * @green: Green channel, returns Lightness channel
+ * @blue: Blue channel, returns Saturation channel
+ *
+ * The arguments are pointers to int representing channel values in the
+ * RGB colorspace, and the values pointed to are all in the range [0, 255].
+ *
+ * The function changes the arguments to point to the corresponding HLS
+ * value with the values pointed to in the following ranges:  H [0, 360],
+ * L [0, 255], S [0, 255].
+ **/
+void
+gimp_rgb_to_hsl_int (gint *red,
+                     gint *green,
+                     gint *blue)
+{
+  gint    r, g, b;
+  gdouble h, s, l;
+  gint    min, max;
+  gint    delta;
+
+  r = *red;
+  g = *green;
+  b = *blue;
+
+  if (r > g)
+    {
+      max = MAX (r, b);
+      min = MIN (g, b);
+    }
+  else
+    {
+      max = MAX (g, b);
+      min = MIN (r, b);
+    }
+
+  l = (max + min) / 2.0;
+
+  if (max == min)
+    {
+      s = 0.0;
+      h = 0.0;
+    }
+  else
+    {
+      delta = (max - min);
+
+      if (l < 128)
+        s = 255 * (gdouble) delta / (gdouble) (max + min);
+      else
+        s = 255 * (gdouble) delta / (gdouble) (511 - max - min);
+
+      if (r == max)
+        h = (g - b) / (gdouble) delta;
+      else if (g == max)
+        h = 2 + (b - r) / (gdouble) delta;
+      else
+        h = 4 + (r - g) / (gdouble) delta;
+
+      h = h * 42.5;
+
+      if (h < 0)
+        h += 255;
+      else if (h > 255)
+        h -= 255;
+    }
+
+  *red   = ROUND (h);
+  *green = ROUND (s);
+  *blue  = ROUND (l);
+}
+
+/**
+ * gimp_rgb_to_l_int:
+ * @red: Red channel
+ * @green: Green channel
+ * @blue: Blue channel
+ *
+ * Calculates the lightness value of an RGB triplet with the formula
+ * L = (max(R, G, B) + min (R, G, B)) / 2
+ *
+ * Return value: Luminance value corresponding to the input RGB value
+ **/
+gint
+gimp_rgb_to_l_int (gint red,
+                   gint green,
+                   gint blue)
+{
+  gint min, max;
+
+  if (red > green)
+    {
+      max = MAX (red,   blue);
+      min = MIN (green, blue);
+    }
+  else
+    {
+      max = MAX (green, blue);
+      min = MIN (red,   blue);
+    }
+
+  return ROUND ((max + min) / 2.0);
+}
+
+static inline gint
+gimp_hsl_value_int (gdouble n1,
+                    gdouble n2,
+                    gdouble hue)
+{
+  gdouble value;
+
+  if (hue > 255)
+    hue -= 255;
+  else if (hue < 0)
+    hue += 255;
+
+  if (hue < 42.5)
+    value = n1 + (n2 - n1) * (hue / 42.5);
+  else if (hue < 127.5)
+    value = n2;
+  else if (hue < 170)
+    value = n1 + (n2 - n1) * ((170 - hue) / 42.5);
+  else
+    value = n1;
+
+  return ROUND (value * 255.0);
+}
+
+/**
+ * gimp_hsl_to_rgb_int:
+ * @hue: Hue channel, returns Red channel
+ * @saturation: Saturation channel, returns Green channel
+ * @lightness: Lightness channel, returns Blue channel
+ *
+ * The arguments are pointers to int, with the values pointed to in the
+ * following ranges:  H [0, 360], L [0, 255], S [0, 255].
+ *
+ * The function changes the arguments to point to the RGB value
+ * corresponding, with the returned values all in the range [0, 255].
+ **/
+void
+gimp_hsl_to_rgb_int (gint *hue,
+                     gint *saturation,
+                     gint *lightness)
+{
+  gdouble h, s, l;
+
+  h = *hue;
+  s = *saturation;
+  l = *lightness;
+
+  if (s == 0)
+    {
+      /*  achromatic case  */
+      *hue        = l;
+      *lightness  = l;
+      *saturation = l;
+    }
+  else
+    {
+      gdouble m1, m2;
+
+      if (l < 128)
+        m2 = (l * (255 + s)) / 65025.0;
+      else
+        m2 = (l + s - (l * s) / 255.0) / 255.0;
+
+      m1 = (l / 127.5) - m2;
+
+      /*  chromatic case  */
+      *hue        = gimp_hsl_value_int (m1, m2, h + 85);
+      *saturation = gimp_hsl_value_int (m1, m2, h);
+      *lightness  = gimp_hsl_value_int (m1, m2, h - 85);
+    }
+}
+
+/**
+ * gimp_rgb_to_cmyk_int:
+ * @red:     the red channel; returns the cyan value (0-255)
+ * @green:   the green channel; returns the magenta value (0-255)
+ * @blue:    the blue channel; returns the yellow value (0-255)
+ * @pullout: the percentage of black to pull out (0-100); returns
+ *           the black value (0-255)
+ *
+ * Does a naive conversion from RGB to CMYK colorspace. A simple
+ * formula that doesn't take any color-profiles into account is used.
+ * The amount of black pullout how can be controlled via the @pullout
+ * parameter. A @pullout value of 0 makes this a conversion to CMY.
+ * A value of 100 causes the maximum amount of black to be pulled out.
+ **/
+void
+gimp_rgb_to_cmyk_int (gint *red,
+                      gint *green,
+                      gint *blue,
+                      gint *pullout)
+{
+  gint c, m, y;
+
+  c = 255 - *red;
+  m = 255 - *green;
+  y = 255 - *blue;
+
+  if (*pullout == 0)
+    {
+      *red   = c;
+      *green = m;
+      *blue  = y;
+    }
+  else
+    {
+      gint k = 255;
+
+      if (c < k)  k = c;
+      if (m < k)  k = m;
+      if (y < k)  k = y;
+
+      k = (k * CLAMP (*pullout, 0, 100)) / 100;
+
+      *red   = ((c - k) << 8) / (256 - k);
+      *green = ((m - k) << 8) / (256 - k);
+      *blue  = ((y - k) << 8) / (256 - k);
+      *pullout = k;
+    }
+}
+
+/**
+ * gimp_cmyk_to_rgb_int:
+ * @cyan:    the cyan channel; returns the red value (0-255)
+ * @magenta: the magenta channel; returns the green value (0-255)
+ * @yellow:  the yellow channel; returns the blue value (0-255)
+ * @black:   the black channel (0-255); doesn't change
+ *
+ * Does a naive conversion from CMYK to RGB colorspace. A simple
+ * formula that doesn't take any color-profiles into account is used.
+ **/
+void
+gimp_cmyk_to_rgb_int (gint *cyan,
+                      gint *magenta,
+                      gint *yellow,
+                      gint *black)
+{
+  gint c, m, y, k;
+
+  c = *cyan;
+  m = *magenta;
+  y = *yellow;
+  k = *black;
+
+  if (k)
+    {
+      c = ((c * (256 - k)) >> 8) + k;
+      m = ((m * (256 - k)) >> 8) + k;
+      y = ((y * (256 - k)) >> 8) + k;
+    }
+
+  *cyan    = 255 - c;
+  *magenta = 255 - m;
+  *yellow  = 255 - y;
+}
+
+/**
+ * gimp_rgb_to_hsv4:
+ * @rgb:        RGB triplet, rgb[0] is red channel, rgb[1] is green,
+ *              rgb[2] is blue (0..255)
+ * @hue:        Pointer to hue channel (0..1)
+ * @saturation: Pointer to saturation channel (0..1)
+ * @value:      Pointer to value channel (0..1)
+ **/
+void
+gimp_rgb_to_hsv4 (const guchar *rgb,
+                  gdouble      *hue,
+                  gdouble      *saturation,
+                  gdouble      *value)
+{
+  gdouble red, green, blue;
+  gdouble h, s, v;
+  gdouble min, max;
+  gdouble delta;
+
+  red   = rgb[0] / 255.0;
+  green = rgb[1] / 255.0;
+  blue  = rgb[2] / 255.0;
+
+  if (red > green)
+    {
+      max = MAX (red,   blue);
+      min = MIN (green, blue);
+    }
+  else
+    {
+      max = MAX (green, blue);
+      min = MIN (red,   blue);
+    }
+
+  v = max;
+
+  if (max != 0.0)
+    s = (max - min) / max;
+  else
+    s = 0.0;
+
+  if (s == 0.0)
+    h = 0.0;
+  else
+    {
+      delta = max - min;
+
+      if (delta == 0.0)
+        delta = 1.0;
+
+      if (red == max)
+        h = (green - blue) / delta;
+      else if (green == max)
+        h = 2 + (blue - red) / delta;
+      else
+        h = 4 + (red - green) / delta;
+
+      h /= 6.0;
+
+      if (h < 0.0)
+        h += 1.0;
+      else if (h > 1.0)
+        h -= 1.0;
+    }
+
+  *hue        = h;
+  *saturation = s;
+  *value      = v;
+}
+
+/**
+ * gimp_hsv_to_rgb4:
+ * @rgb:        RGB triplet, rgb[0] is red channel, rgb[1] is green,
+ *              rgb[2] is blue (0..255)
+ * @hue:        Hue channel (0..1)
+ * @saturation: Saturation channel (0..1)
+ * @value:      Value channel (0..1)
+ **/
+void
+gimp_hsv_to_rgb4 (guchar  *rgb,
+                  gdouble  hue,
+                  gdouble  saturation,
+                  gdouble  value)
+{
+  gdouble h, s, v;
+  gdouble f, p, q, t;
+
+  if (saturation == 0.0)
+    {
+      hue        = value;
+      saturation = value;
+      /*value      = value;*/
+    }
+  else
+    {
+      h = hue * 6.0;
+      s = saturation;
+      v = value;
+
+      if (h == 6.0)
+        h = 0.0;
+
+      f = h - (gint) h;
+      p = v * (1.0 - s);
+      q = v * (1.0 - s * f);
+      t = v * (1.0 - s * (1.0 - f));
+
+      switch ((int) h)
+        {
+        case 0:
+          hue        = v;
+          saturation = t;
+          value      = p;
+          break;
+
+        case 1:
+          hue        = q;
+          saturation = v;
+          value      = p;
+          break;
+
+        case 2:
+          hue        = p;
+          saturation = v;
+          value      = t;
+          break;
+
+        case 3:
+          hue        = p;
+          saturation = q;
+          value      = v;
+          break;
+
+        case 4:
+          hue        = t;
+          saturation = p;
+          value      = v;
+          break;
+
+        case 5:
+          hue        = v;
+          saturation = p;
+          value      = q;
+          break;
+        }
+    }
+
+  rgb[0] = ROUND (hue        * 255.0);
+  rgb[1] = ROUND (saturation * 255.0);
+  rgb[2] = ROUND (value      * 255.0);
+}
diff --git a/libgimpcolor/gimpcolorspace.h b/libgimpcolor/gimpcolorspace.h
new file mode 100644
index 0000000..ae06536
--- /dev/null
+++ b/libgimpcolor/gimpcolorspace.h
@@ -0,0 +1,121 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_COLOR_H_INSIDE__) && !defined (GIMP_COLOR_COMPILATION)
+#error "Only <libgimpcolor/gimpcolor.h> can be included directly."
+#endif
+
+#ifndef __GIMP_COLOR_SPACE_H__
+#define __GIMP_COLOR_SPACE_H__
+
+G_BEGIN_DECLS
+
+/* For information look into the C source or the html documentation */
+
+
+/*  Color conversion routines  */
+
+
+/*  GimpRGB function  */
+
+void   gimp_rgb_to_hsv          (const GimpRGB  *rgb,
+                                 GimpHSV        *hsv);
+void   gimp_rgb_to_hsl          (const GimpRGB  *rgb,
+                                 GimpHSL        *hsl);
+void   gimp_rgb_to_cmyk         (const GimpRGB  *rgb,
+                                 gdouble         pullout,
+                                 GimpCMYK       *cmyk);
+
+void   gimp_hsv_to_rgb          (const GimpHSV  *hsv,
+                                 GimpRGB        *rgb);
+void   gimp_hsl_to_rgb          (const GimpHSL  *hsl,
+                                 GimpRGB        *rgb);
+void   gimp_cmyk_to_rgb         (const GimpCMYK *cmyk,
+                                 GimpRGB        *rgb);
+
+GIMP_DEPRECATED
+void   gimp_rgb_to_hwb          (const GimpRGB  *rgb,
+                                 gdouble        *hue,
+                                 gdouble        *whiteness,
+                                 gdouble        *blackness);
+
+GIMP_DEPRECATED
+void   gimp_hwb_to_rgb          (gdouble         hue,
+                                 gdouble         whiteness,
+                                 gdouble         blackness,
+                                 GimpRGB        *rgb);
+
+
+/*  gint functions  */
+
+GIMP_DEPRECATED_FOR (gimp_rgb_to_hsv)
+void    gimp_rgb_to_hsv_int     (gint    *red         /* returns hue        */,
+                                 gint    *green       /* returns saturation */,
+                                 gint    *blue        /* returns value      */);
+
+GIMP_DEPRECATED_FOR (gimp_hsv_to_rgb)
+void    gimp_hsv_to_rgb_int     (gint    *hue         /* returns red        */,
+                                 gint    *saturation  /* returns green      */,
+                                 gint    *value       /* returns blue       */);
+
+GIMP_DEPRECATED_FOR (gimp_rgb_to_cmyk)
+void    gimp_rgb_to_cmyk_int    (gint    *red         /* returns cyan       */,
+                                 gint    *green       /* returns magenta    */,
+                                 gint    *blue        /* returns yellow     */,
+                                 gint    *pullout     /* returns black      */);
+
+GIMP_DEPRECATED_FOR (gimp_cmyk_to_rgb)
+void    gimp_cmyk_to_rgb_int    (gint    *cyan        /* returns red        */,
+                                 gint    *magenta     /* returns green      */,
+                                 gint    *yellow      /* returns blue       */,
+                                 gint    *black       /* not changed        */);
+
+GIMP_DEPRECATED_FOR (gimp_rgb_to_hsl)
+void    gimp_rgb_to_hsl_int     (gint    *red         /* returns hue        */,
+                                 gint    *green       /* returns saturation */,
+                                 gint    *blue        /* returns lightness  */);
+
+GIMP_DEPRECATED_FOR (gimp_rgb_to_hsl)
+gint    gimp_rgb_to_l_int       (gint     red,
+                                 gint     green,
+                                 gint     blue);
+
+GIMP_DEPRECATED_FOR (gimp_hsl_to_rgb)
+void    gimp_hsl_to_rgb_int     (gint    *hue         /* returns red        */,
+                                 gint    *saturation  /* returns green      */,
+                                 gint    *lightness   /* returns blue       */);
+
+
+/*  gdouble functions  */
+
+GIMP_DEPRECATED_FOR (gimp_rgb_to_hsv)
+void    gimp_rgb_to_hsv4        (const guchar *rgb,
+                                 gdouble      *hue,
+                                 gdouble      *saturation,
+                                 gdouble      *value);
+
+GIMP_DEPRECATED_FOR (gimp_hsv_to_rgb)
+void    gimp_hsv_to_rgb4        (guchar       *rgb,
+                                 gdouble       hue,
+                                 gdouble       saturation,
+                                 gdouble       value);
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_COLOR_SPACE_H__ */
diff --git a/libgimpcolor/gimpcolortransform.c b/libgimpcolor/gimpcolortransform.c
new file mode 100644
index 0000000..b01f739
--- /dev/null
+++ b/libgimpcolor/gimpcolortransform.c
@@ -0,0 +1,596 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * gimpcolortransform.c
+ * Copyright (C) 2014  Michael Natterer <mitch@gimp.org>
+ *                     Elle Stone <ellestone@ninedegreesbelow.com>
+ *                     Øyvind Kolås <pippin@gimp.org>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <lcms2.h>
+
+#include <gio/gio.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpconfig/gimpconfig.h"
+
+#include "gimpcolortypes.h"
+
+#include "gimpcolorprofile.h"
+#include "gimpcolortransform.h"
+
+#include "libgimp/libgimp-intl.h"
+
+
+/**
+ * SECTION: gimpcolortransform
+ * @title: GimpColorTransform
+ * @short_description: Definitions and Functions relating to LCMS.
+ *
+ * Definitions and Functions relating to LCMS.
+ **/
+
+/**
+ * GimpColorTransform:
+ *
+ * Simply a typedef to #gpointer, but actually is a cmsHTRANSFORM. It's
+ * used in public GIMP APIs in order to avoid having to include LCMS
+ * headers.
+ **/
+
+
+enum
+{
+  PROGRESS,
+  LAST_SIGNAL
+};
+
+
+struct _GimpColorTransformPrivate
+{
+  GimpColorProfile *src_profile;
+  const Babl       *src_format;
+  const Babl       *src_space_format;
+
+  GimpColorProfile *dest_profile;
+  const Babl       *dest_format;
+  const Babl       *dest_space_format;
+
+  cmsHTRANSFORM     transform;
+  const Babl       *fish;
+};
+
+
+static void   gimp_color_transform_finalize (GObject *object);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpColorTransform, gimp_color_transform,
+                            G_TYPE_OBJECT)
+
+#define parent_class gimp_color_transform_parent_class
+
+static guint gimp_color_transform_signals[LAST_SIGNAL] = { 0 };
+
+static gchar *lcms_last_error = NULL;
+
+
+static void
+lcms_error_clear (void)
+{
+  if (lcms_last_error)
+    {
+      g_free (lcms_last_error);
+      lcms_last_error = NULL;
+    }
+}
+
+static void
+lcms_error_handler (cmsContext       ContextID,
+                    cmsUInt32Number  ErrorCode,
+                    const gchar     *text)
+{
+  lcms_error_clear ();
+
+  lcms_last_error = g_strdup_printf ("lcms2 error %d: %s", ErrorCode, text);
+}
+
+static void
+gimp_color_transform_class_init (GimpColorTransformClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = gimp_color_transform_finalize;
+
+  gimp_color_transform_signals[PROGRESS] =
+    g_signal_new ("progress",
+                  G_OBJECT_CLASS_TYPE (object_class),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpColorTransformClass,
+                                   progress),
+                  NULL, NULL,
+                  g_cclosure_marshal_VOID__DOUBLE,
+                  G_TYPE_NONE, 1,
+                  G_TYPE_DOUBLE);
+
+  cmsSetLogErrorHandler (lcms_error_handler);
+}
+
+static void
+gimp_color_transform_init (GimpColorTransform *transform)
+{
+  transform->priv = gimp_color_transform_get_instance_private (transform);
+}
+
+static void
+gimp_color_transform_finalize (GObject *object)
+{
+  GimpColorTransform *transform = GIMP_COLOR_TRANSFORM (object);
+
+  g_clear_object (&transform->priv->src_profile);
+  g_clear_object (&transform->priv->dest_profile);
+
+  g_clear_pointer (&transform->priv->transform, cmsDeleteTransform);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+
+/**
+ * gimp_color_transform_new:
+ * @src_profile:      the source #GimpColorProfile
+ * @src_format:       the source #Babl format
+ * @dest_profile:     the destination #GimpColorProfile
+ * @dest_format:      the destination #Babl format
+ * @rendering_intent: the rendering intent
+ * @flags:            transform flags
+ *
+ * This function creates an color transform.
+ *
+ * Return value: the #GimpColorTransform, or %NULL if no transform is needed
+ *               to convert between pixels of @src_profile and @dest_profile.
+ *
+ * Since: 2.10
+ **/
+GimpColorTransform *
+gimp_color_transform_new (GimpColorProfile         *src_profile,
+                          const Babl               *src_format,
+                          GimpColorProfile         *dest_profile,
+                          const Babl               *dest_format,
+                          GimpColorRenderingIntent  rendering_intent,
+                          GimpColorTransformFlags   flags)
+{
+  GimpColorTransform        *transform;
+  GimpColorTransformPrivate *priv;
+  cmsHPROFILE                src_lcms;
+  cmsHPROFILE                dest_lcms;
+  cmsUInt32Number            lcms_src_format;
+  cmsUInt32Number            lcms_dest_format;
+  GError                    *error = NULL;
+
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (src_profile), NULL);
+  g_return_val_if_fail (src_format != NULL, NULL);
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (dest_profile), NULL);
+  g_return_val_if_fail (dest_format != NULL, NULL);
+
+  if (gimp_color_transform_can_gegl_copy (src_profile, dest_profile))
+    return NULL;
+
+  transform = g_object_new (GIMP_TYPE_COLOR_TRANSFORM, NULL);
+
+  priv = transform->priv;
+
+  priv->src_space_format = gimp_color_profile_get_format (src_profile,
+                                                          src_format,
+                                                          BABL_ICC_INTENT_RELATIVE_COLORIMETRIC,
+                                                          &error);
+  if (! priv->src_space_format)
+    {
+      g_printerr ("%s: error making src format: %s\n",
+                  G_STRFUNC, error->message);
+      g_clear_error (&error);
+    }
+
+  priv->dest_space_format = gimp_color_profile_get_format (dest_profile,
+                                                           dest_format,
+                                                           rendering_intent,
+                                                           &error);
+  if (! priv->dest_space_format)
+    {
+      g_printerr ("%s: error making dest format: %s\n",
+                  G_STRFUNC, error->message);
+      g_clear_error (&error);
+    }
+
+  if (! g_getenv ("GIMP_COLOR_TRANSFORM_DISABLE_BABL") &&
+      priv->src_space_format && priv->dest_space_format)
+    {
+      priv->src_format  = src_format;
+      priv->dest_format = dest_format;
+      priv->fish        = babl_fish (priv->src_space_format,
+                                     priv->dest_space_format);
+
+      g_printerr ("%s: using babl for '%s' -> '%s'\n",
+                  G_STRFUNC,
+                  gimp_color_profile_get_label (src_profile),
+                  gimp_color_profile_get_label (dest_profile));
+
+      return transform;
+    }
+
+  priv->src_space_format  = NULL;
+  priv->dest_space_format = NULL;
+
+  priv->src_format  = gimp_color_profile_get_lcms_format (src_format,
+                                                          &lcms_src_format);
+  priv->dest_format = gimp_color_profile_get_lcms_format (dest_format,
+                                                          &lcms_dest_format);
+
+  src_lcms  = gimp_color_profile_get_lcms_profile (src_profile);
+  dest_lcms = gimp_color_profile_get_lcms_profile (dest_profile);
+
+  lcms_error_clear ();
+
+  priv->transform = cmsCreateTransform (src_lcms,  lcms_src_format,
+                                        dest_lcms, lcms_dest_format,
+                                        rendering_intent,
+                                        flags |
+                                        cmsFLAGS_COPY_ALPHA);
+
+  if (lcms_last_error)
+    {
+      if (priv->transform)
+        {
+          cmsDeleteTransform (priv->transform);
+          priv->transform = NULL;
+        }
+
+      g_printerr ("%s\n", lcms_last_error);
+    }
+
+  if (! priv->transform)
+    {
+      g_object_unref (transform);
+      transform = NULL;
+    }
+
+  return transform;
+}
+
+/**
+ * gimp_color_transform_new_proofing:
+ * @src_profile:    the source #GimpColorProfile
+ * @src_format:     the source #Babl format
+ * @dest_profile:   the destination #GimpColorProfile
+ * @dest_format:    the destination #Babl format
+ * @proof_profile:  the proof #GimpColorProfile
+ * @proof_intent:   the proof intent
+ * @display_intent: the display intent
+ * @flags:          transform flags
+ *
+ * This function creates a simulation / proofing color transform.
+ *
+ * Return value: the #GimpColorTransform, or %NULL.
+ *
+ * Since: 2.10
+ **/
+GimpColorTransform *
+gimp_color_transform_new_proofing (GimpColorProfile         *src_profile,
+                                   const Babl               *src_format,
+                                   GimpColorProfile         *dest_profile,
+                                   const Babl               *dest_format,
+                                   GimpColorProfile         *proof_profile,
+                                   GimpColorRenderingIntent  proof_intent,
+                                   GimpColorRenderingIntent  display_intent,
+                                   GimpColorTransformFlags   flags)
+{
+  GimpColorTransform        *transform;
+  GimpColorTransformPrivate *priv;
+  cmsHPROFILE                src_lcms;
+  cmsHPROFILE                dest_lcms;
+  cmsHPROFILE                proof_lcms;
+  cmsUInt32Number            lcms_src_format;
+  cmsUInt32Number            lcms_dest_format;
+
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (src_profile), NULL);
+  g_return_val_if_fail (src_format != NULL, NULL);
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (dest_profile), NULL);
+  g_return_val_if_fail (dest_format != NULL, NULL);
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (proof_profile), NULL);
+
+  transform = g_object_new (GIMP_TYPE_COLOR_TRANSFORM, NULL);
+
+  priv = transform->priv;
+
+  src_lcms   = gimp_color_profile_get_lcms_profile (src_profile);
+  dest_lcms  = gimp_color_profile_get_lcms_profile (dest_profile);
+  proof_lcms = gimp_color_profile_get_lcms_profile (proof_profile);
+
+  priv->src_format  = gimp_color_profile_get_lcms_format (src_format,
+                                                          &lcms_src_format);
+  priv->dest_format = gimp_color_profile_get_lcms_format (dest_format,
+                                                          &lcms_dest_format);
+
+  lcms_error_clear ();
+
+  priv->transform = cmsCreateProofingTransform (src_lcms,  lcms_src_format,
+                                                dest_lcms, lcms_dest_format,
+                                                proof_lcms,
+                                                proof_intent,
+                                                display_intent,
+                                                flags                 |
+                                                cmsFLAGS_SOFTPROOFING |
+                                                cmsFLAGS_COPY_ALPHA);
+
+  if (lcms_last_error)
+    {
+      if (priv->transform)
+        {
+          cmsDeleteTransform (priv->transform);
+          priv->transform = NULL;
+        }
+
+      g_printerr ("%s\n", lcms_last_error);
+    }
+
+  if (! priv->transform)
+    {
+      g_object_unref (transform);
+      transform = NULL;
+    }
+
+  return transform;
+}
+
+/**
+ * gimp_color_transform_process_pixels:
+ * @transform:   a #GimpColorTransform
+ * @src_format:  #Babl format of @src_pixels
+ * @src_pixels:  pointer to the source pixels
+ * @dest_format: #Babl format of @dest_pixels
+ * @dest_pixels: pointer to the destination pixels
+ * @length:      number of pixels to process
+ *
+ * This function transforms a contiguous line of pixels.
+ *
+ * Since: 2.10
+ **/
+void
+gimp_color_transform_process_pixels (GimpColorTransform *transform,
+                                     const Babl         *src_format,
+                                     gconstpointer       src_pixels,
+                                     const Babl         *dest_format,
+                                     gpointer            dest_pixels,
+                                     gsize               length)
+{
+  GimpColorTransformPrivate *priv;
+  gpointer                  *src;
+  gpointer                  *dest;
+
+  g_return_if_fail (GIMP_IS_COLOR_TRANSFORM (transform));
+  g_return_if_fail (src_format != NULL);
+  g_return_if_fail (src_pixels != NULL);
+  g_return_if_fail (dest_format != NULL);
+  g_return_if_fail (dest_pixels != NULL);
+
+  priv = transform->priv;
+
+  if (src_format != priv->src_format)
+    {
+      src = g_malloc (length * babl_format_get_bytes_per_pixel (priv->src_format));
+
+      babl_process (babl_fish (src_format,
+                               priv->src_format),
+                    src_pixels, src, length);
+    }
+  else
+    {
+      src = (gpointer) src_pixels;
+    }
+
+  if (dest_format != priv->dest_format)
+    {
+      dest = g_malloc (length * babl_format_get_bytes_per_pixel (priv->dest_format));
+    }
+  else
+    {
+      dest = dest_pixels;
+    }
+
+  if (priv->transform)
+    {
+      cmsDoTransform (priv->transform, src, dest, length);
+    }
+  else
+    {
+      babl_process (priv->fish, src, dest, length);
+    }
+
+  if (src_format != priv->src_format)
+    {
+      g_free (src);
+    }
+
+  if (dest_format != priv->dest_format)
+    {
+      babl_process (babl_fish (priv->dest_format,
+                               dest_format),
+                    dest, dest_pixels, length);
+
+      g_free (dest);
+    }
+}
+
+/**
+ * gimp_color_transform_process_buffer:
+ * @transform:   a #GimpColorTransform
+ * @src_buffer:  source #GeglBuffer
+ * @src_rect:    rectangle in @src_buffer
+ * @dest_buffer: destination #GeglBuffer
+ * @dest_rect:   rectangle in @dest_buffer
+ *
+ * This function transforms buffer into another buffer.
+ *
+ * Since: 2.10
+ **/
+void
+gimp_color_transform_process_buffer (GimpColorTransform  *transform,
+                                     GeglBuffer          *src_buffer,
+                                     const GeglRectangle *src_rect,
+                                     GeglBuffer          *dest_buffer,
+                                     const GeglRectangle *dest_rect)
+{
+  GimpColorTransformPrivate *priv;
+  GeglBufferIterator        *iter;
+  gint                       total_pixels;
+  gint                       done_pixels = 0;
+
+  g_return_if_fail (GIMP_IS_COLOR_TRANSFORM (transform));
+  g_return_if_fail (GEGL_IS_BUFFER (src_buffer));
+  g_return_if_fail (GEGL_IS_BUFFER (dest_buffer));
+
+  priv = transform->priv;
+
+  if (src_rect)
+    {
+      total_pixels = src_rect->width * src_rect->height;
+    }
+  else
+    {
+      total_pixels = (gegl_buffer_get_width  (src_buffer) *
+                      gegl_buffer_get_height (src_buffer));
+    }
+
+  if (src_buffer != dest_buffer)
+    {
+      iter = gegl_buffer_iterator_new (src_buffer, src_rect, 0,
+                                       priv->src_format,
+                                       GEGL_ACCESS_READ,
+                                       GEGL_ABYSS_NONE, 2);
+
+      gegl_buffer_iterator_add (iter, dest_buffer, dest_rect, 0,
+                                priv->dest_format,
+                                GEGL_ACCESS_WRITE,
+                                GEGL_ABYSS_NONE);
+
+      while (gegl_buffer_iterator_next (iter))
+        {
+          if (priv->transform)
+            {
+              cmsDoTransform (priv->transform,
+                              iter->items[0].data, iter->items[1].data, iter->length);
+            }
+          else
+            {
+              babl_process (priv->fish,
+                            iter->items[0].data, iter->items[1].data, iter->length);
+            }
+
+          done_pixels += iter->items[0].roi.width * iter->items[0].roi.height;
+
+          g_signal_emit (transform, gimp_color_transform_signals[PROGRESS], 0,
+                         (gdouble) done_pixels /
+                         (gdouble) total_pixels);
+        }
+    }
+  else
+    {
+      iter = gegl_buffer_iterator_new (src_buffer, src_rect, 0,
+                                       priv->src_format,
+                                       GEGL_ACCESS_READWRITE,
+                                       GEGL_ABYSS_NONE, 1);
+
+      while (gegl_buffer_iterator_next (iter))
+        {
+          if (priv->transform)
+            {
+              cmsDoTransform (priv->transform,
+                              iter->items[0].data, iter->items[0].data, iter->length);
+            }
+          else
+            {
+              babl_process (priv->fish,
+                            iter->items[0].data, iter->items[0].data, iter->length);
+            }
+
+          done_pixels += iter->items[0].roi.width * iter->items[0].roi.height;
+
+          g_signal_emit (transform, gimp_color_transform_signals[PROGRESS], 0,
+                         (gdouble) done_pixels /
+                         (gdouble) total_pixels);
+        }
+    }
+
+  g_signal_emit (transform, gimp_color_transform_signals[PROGRESS], 0,
+                 1.0);
+}
+
+/**
+ * gimp_color_transform_can_gegl_copy:
+ * @src_profile:  source #GimpColorProfile
+ * @dest_profile: destination #GimpColorProfile
+ *
+ * This function checks if a GimpColorTransform is needed at all.
+ *
+ * Return value: %TRUE if pixels can be correctly converted between
+ *               @src_profile and @dest_profile by simply using
+ *               gegl_buffer_copy(), babl_process() or similar.
+ *
+ * Since: 2.10
+ **/
+gboolean
+gimp_color_transform_can_gegl_copy (GimpColorProfile *src_profile,
+                                    GimpColorProfile *dest_profile)
+{
+  static GimpColorProfile *srgb_profile        = NULL;
+  static GimpColorProfile *srgb_linear_profile = NULL;
+  static GimpColorProfile *gray_profile        = NULL;
+  static GimpColorProfile *gray_linear_profile = NULL;
+
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (src_profile), FALSE);
+  g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (dest_profile), FALSE);
+
+  if (gimp_color_profile_is_equal (src_profile, dest_profile))
+    return TRUE;
+
+  if (! srgb_profile)
+    {
+      srgb_profile        = gimp_color_profile_new_rgb_srgb ();
+      srgb_linear_profile = gimp_color_profile_new_rgb_srgb_linear ();
+      gray_profile        = gimp_color_profile_new_d65_gray_srgb_trc ();
+      gray_linear_profile = gimp_color_profile_new_d65_gray_linear ();
+    }
+
+  if ((gimp_color_profile_is_equal (src_profile, srgb_profile)        ||
+       gimp_color_profile_is_equal (src_profile, srgb_linear_profile) ||
+       gimp_color_profile_is_equal (src_profile, gray_profile)        ||
+       gimp_color_profile_is_equal (src_profile, gray_linear_profile))
+      &&
+      (gimp_color_profile_is_equal (dest_profile, srgb_profile)        ||
+       gimp_color_profile_is_equal (dest_profile, srgb_linear_profile) ||
+       gimp_color_profile_is_equal (dest_profile, gray_profile)        ||
+       gimp_color_profile_is_equal (dest_profile, gray_linear_profile)))
+    {
+      return TRUE;
+    }
+
+  return FALSE;
+}
diff --git a/libgimpcolor/gimpcolortransform.h b/libgimpcolor/gimpcolortransform.h
new file mode 100644
index 0000000..c579470
--- /dev/null
+++ b/libgimpcolor/gimpcolortransform.h
@@ -0,0 +1,127 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * gimpcolortransform.h
+ * Copyright (C) 2014  Michael Natterer <mitch@gimp.org>
+ *                     Elle Stone <ellestone@ninedegreesbelow.com>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_COLOR_H_INSIDE__) && !defined (GIMP_COLOR_COMPILATION)
+#error "Only <libgimpcolor/gimpcolor.h> can be included directly."
+#endif
+
+#ifndef __GIMP_COLOR_TRANSFORM_H__
+#define __GIMP_COLOR_TRANSFORM_H__
+
+G_BEGIN_DECLS
+
+/* For information look into the C source or the html documentation */
+
+
+/**
+ * GimpColorTransformFlags:
+ * @GIMP_COLOR_TRANSFORM_FLAGS_NOOPTIMIZE: optimize for accuracy rather
+ *   than for speed
+ * @GIMP_COLOR_TRANSFORM_FLAGS_GAMUT_CHECK: mark out of gamut colors in the
+ *   transform result
+ * @GIMP_COLOR_TRANSFORM_FLAGS_BLACK_POINT_COMPENSATION: do black point
+ *   compensation
+ *
+ * Flags for modifying #GimpColorTransform's behavior.
+ **/
+typedef enum
+{
+  GIMP_COLOR_TRANSFORM_FLAGS_NOOPTIMIZE               = 0x0100,
+  GIMP_COLOR_TRANSFORM_FLAGS_GAMUT_CHECK              = 0x1000,
+  GIMP_COLOR_TRANSFORM_FLAGS_BLACK_POINT_COMPENSATION = 0x2000,
+} GimpColorTransformFlags;
+
+
+#define GIMP_TYPE_COLOR_TRANSFORM            (gimp_color_transform_get_type ())
+#define GIMP_COLOR_TRANSFORM(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_COLOR_TRANSFORM, GimpColorTransform))
+#define GIMP_COLOR_TRANSFORM_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_COLOR_TRANSFORM, GimpColorTransformClass))
+#define GIMP_IS_COLOR_TRANSFORM(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_COLOR_TRANSFORM))
+#define GIMP_IS_COLOR_TRANSFORM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_COLOR_TRANSFORM))
+#define GIMP_COLOR_TRANSFORM_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_COLOR_TRANSFORM, GimpColorTransformClass))
+
+
+typedef struct _GimpColorTransformClass   GimpColorTransformClass;
+typedef struct _GimpColorTransformPrivate GimpColorTransformPrivate;
+
+struct _GimpColorTransform
+{
+  GObject                    parent_instance;
+
+  GimpColorTransformPrivate *priv;
+};
+
+struct _GimpColorTransformClass
+{
+  GObjectClass  parent_class;
+
+  /* signals */
+  void (* progress) (GimpColorTransform *transform,
+                     gdouble             fraction);
+
+  /* Padding for future expansion */
+  void (* _gimp_reserved1) (void);
+  void (* _gimp_reserved2) (void);
+  void (* _gimp_reserved3) (void);
+  void (* _gimp_reserved4) (void);
+};
+
+
+GType   gimp_color_transform_get_type (void) G_GNUC_CONST;
+
+GimpColorTransform *
+        gimp_color_transform_new              (GimpColorProfile         *src_profile,
+                                               const Babl               *src_format,
+                                               GimpColorProfile         *dest_profile,
+                                               const Babl               *dest_format,
+                                               GimpColorRenderingIntent  rendering_intent,
+                                               GimpColorTransformFlags   flags);
+
+GimpColorTransform *
+        gimp_color_transform_new_proofing     (GimpColorProfile         *src_profile,
+                                               const Babl               *src_format,
+                                               GimpColorProfile         *dest_profile,
+                                               const Babl               *dest_format,
+                                               GimpColorProfile         *proof_profile,
+                                               GimpColorRenderingIntent  proof_intent,
+                                               GimpColorRenderingIntent  display_intent,
+                                               GimpColorTransformFlags   flags);
+
+void    gimp_color_transform_process_pixels   (GimpColorTransform       *transform,
+                                               const Babl               *src_format,
+                                               gconstpointer             src_pixels,
+                                               const Babl               *dest_format,
+                                               gpointer                  dest_pixels,
+                                               gsize                     length);
+
+void    gimp_color_transform_process_buffer   (GimpColorTransform       *transform,
+                                               GeglBuffer               *src_buffer,
+                                               const GeglRectangle      *src_rect,
+                                               GeglBuffer               *dest_buffer,
+                                               const GeglRectangle      *dest_rect);
+
+gboolean gimp_color_transform_can_gegl_copy   (GimpColorProfile         *src_profile,
+                                               GimpColorProfile         *dest_profile);
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_COLOR_TRANSFORM_H__ */
diff --git a/libgimpcolor/gimpcolortypes.h b/libgimpcolor/gimpcolortypes.h
new file mode 100644
index 0000000..565df1b
--- /dev/null
+++ b/libgimpcolor/gimpcolortypes.h
@@ -0,0 +1,126 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_COLOR_TYPES_H__
+#define __GIMP_COLOR_TYPES_H__
+
+
+#include <libgimpbase/gimpbasetypes.h>
+#include <libgimpconfig/gimpconfigtypes.h>
+
+
+G_BEGIN_DECLS
+
+/* For information look into the C source or the html documentation */
+
+
+typedef struct _GimpColorManaged   GimpColorManaged;  /* dummy typedef */
+typedef struct _GimpColorProfile   GimpColorProfile;
+typedef struct _GimpColorTransform GimpColorTransform;
+
+
+/*  usually we don't keep the structure definitions in the types file
+ *  but GimpRGB appears in too many header files...
+ */
+
+typedef struct _GimpRGB  GimpRGB;
+typedef struct _GimpHSV  GimpHSV;
+typedef struct _GimpHSL  GimpHSL;
+typedef struct _GimpCMYK GimpCMYK;
+
+/**
+ * GimpRGB:
+ * @r: the red component
+ * @g: the green component
+ * @b: the blue component
+ * @a: the alpha component
+ *
+ * Used to keep RGB and RGBA colors. All components are in a range of
+ * [0.0..1.0].
+ **/
+struct _GimpRGB
+{
+  gdouble r, g, b, a;
+};
+
+/**
+ * GimpHSV:
+ * @h: the hue component
+ * @s: the saturation component
+ * @v: the value component
+ * @a: the alpha component
+ *
+ * Used to keep HSV and HSVA colors. All components are in a range of
+ * [0.0..1.0].
+ **/
+struct _GimpHSV
+{
+  gdouble h, s, v, a;
+};
+
+/**
+ * GimpHSL:
+ * @h: the hue component
+ * @s: the saturation component
+ * @l: the lightness component
+ * @a: the alpha component
+ *
+ * Used to keep HSL and HSLA colors. All components are in a range of
+ * [0.0..1.0].
+ **/
+struct _GimpHSL
+{
+  gdouble h, s, l, a;
+};
+
+/**
+ * GimpCMYK:
+ * @c: the cyan component
+ * @m: the magenta component
+ * @y: the yellow component
+ * @k: the black component
+ * @a: the alpha component
+ *
+ * Used to keep CMYK and CMYKA colors. All components are in a range
+ * of [0.0..1.0]. An alpha value is somewhat useless in the CMYK
+ * colorspace, but we keep one around anyway so color conversions
+ * going to CMYK and back can preserve alpha.
+ **/
+struct _GimpCMYK
+{
+  gdouble c, m, y, k, a;
+};
+
+
+typedef void (* GimpRenderFunc)   (gdouble   x,
+                                   gdouble   y,
+                                   GimpRGB  *color,
+                                   gpointer  data);
+typedef void (* GimpPutPixelFunc) (gint      x,
+                                   gint      y,
+                                   GimpRGB  *color,
+                                   gpointer  data);
+typedef void (* GimpProgressFunc) (gint      min,
+                                   gint      max,
+                                   gint      current,
+                                   gpointer  data);
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_COLOR_TYPES_H__ */
diff --git a/libgimpcolor/gimphsl.c b/libgimpcolor/gimphsl.c
new file mode 100644
index 0000000..050a40d
--- /dev/null
+++ b/libgimpcolor/gimphsl.c
@@ -0,0 +1,93 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <glib-object.h>
+
+#include "gimpcolortypes.h"
+
+#include "gimphsl.h"
+
+
+/*
+ * GIMP_TYPE_HSL
+ */
+
+static GimpHSL * gimp_hsl_copy (const GimpHSL *hsl);
+
+
+GType
+gimp_hsl_get_type (void)
+{
+  static GType hsl_type = 0;
+
+  if (!hsl_type)
+    hsl_type = g_boxed_type_register_static ("GimpHSL",
+                                              (GBoxedCopyFunc) gimp_hsl_copy,
+                                              (GBoxedFreeFunc) g_free);
+
+  return hsl_type;
+}
+
+static GimpHSL *
+gimp_hsl_copy (const GimpHSL *hsl)
+{
+  return g_memdup (hsl, sizeof (GimpHSL));
+}
+
+
+/*  HSL functions  */
+
+/**
+ * gimp_hsl_set:
+ * @hsl:
+ * @h:
+ * @s:
+ * @l:
+ *
+ * Since: 2.8
+ **/
+void
+gimp_hsl_set (GimpHSL *hsl,
+              gdouble  h,
+              gdouble  s,
+              gdouble  l)
+{
+  g_return_if_fail (hsl != NULL);
+
+  hsl->h = h;
+  hsl->s = s;
+  hsl->l = l;
+}
+
+/**
+ * gimp_hsl_set_alpha:
+ * @hsl:
+ * @a:
+ *
+ * Since: 2.10
+ **/
+void
+gimp_hsl_set_alpha (GimpHSL *hsl,
+                    gdouble a)
+{
+  g_return_if_fail (hsl != NULL);
+
+  hsl->a = a;
+}
diff --git a/libgimpcolor/gimphsl.h b/libgimpcolor/gimphsl.h
new file mode 100644
index 0000000..f2a4cfb
--- /dev/null
+++ b/libgimpcolor/gimphsl.h
@@ -0,0 +1,49 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_COLOR_H_INSIDE__) && !defined (GIMP_COLOR_COMPILATION)
+#error "Only <libgimpcolor/gimpcolor.h> can be included directly."
+#endif
+
+#ifndef __GIMP_HSL_H__
+#define __GIMP_HSL_H__
+
+G_BEGIN_DECLS
+
+/* For information look into the C source or the html documentation */
+
+
+/*
+ * GIMP_TYPE_HSL
+ */
+
+#define GIMP_TYPE_HSL       (gimp_hsl_get_type ())
+
+GType   gimp_hsl_get_type   (void) G_GNUC_CONST;
+
+void    gimp_hsl_set        (GimpHSL *hsl,
+                             gdouble  h,
+                             gdouble  s,
+                             gdouble  l);
+void    gimp_hsl_set_alpha  (GimpHSL *hsl,
+                             gdouble  a);
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_HSL_H__ */
diff --git a/libgimpcolor/gimphsv.c b/libgimpcolor/gimphsv.c
new file mode 100644
index 0000000..56bfbd7
--- /dev/null
+++ b/libgimpcolor/gimphsv.c
@@ -0,0 +1,107 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <glib-object.h>
+
+#include "gimpcolortypes.h"
+
+#include "gimphsv.h"
+
+
+/**
+ * SECTION: gimphsv
+ * @title: GimpHSV
+ * @short_description: Definitions and Functions relating to HSV colors.
+ *
+ * Definitions and Functions relating to HSV colors.
+ **/
+
+
+/*
+ * GIMP_TYPE_HSV
+ */
+
+static GimpHSV * gimp_hsv_copy (const GimpHSV *hsv);
+
+
+GType
+gimp_hsv_get_type (void)
+{
+  static GType hsv_type = 0;
+
+  if (!hsv_type)
+    hsv_type = g_boxed_type_register_static ("GimpHSV",
+                                              (GBoxedCopyFunc) gimp_hsv_copy,
+                                              (GBoxedFreeFunc) g_free);
+
+  return hsv_type;
+}
+
+static GimpHSV *
+gimp_hsv_copy (const GimpHSV *hsv)
+{
+  return g_memdup (hsv, sizeof (GimpHSV));
+}
+
+
+/*  HSV functions  */
+
+void
+gimp_hsv_set (GimpHSV *hsv,
+              gdouble  h,
+              gdouble  s,
+              gdouble  v)
+{
+  g_return_if_fail (hsv != NULL);
+
+  hsv->h = h;
+  hsv->s = s;
+  hsv->v = v;
+}
+
+void
+gimp_hsv_clamp (GimpHSV *hsv)
+{
+  g_return_if_fail (hsv != NULL);
+
+  hsv->h -= (gint) hsv->h;
+
+  if (hsv->h < 0)
+    hsv->h += 1.0;
+
+  hsv->s = CLAMP (hsv->s, 0.0, 1.0);
+  hsv->v = CLAMP (hsv->v, 0.0, 1.0);
+  hsv->a = CLAMP (hsv->a, 0.0, 1.0);
+}
+
+void
+gimp_hsva_set (GimpHSV *hsva,
+               gdouble  h,
+               gdouble  s,
+               gdouble  v,
+               gdouble  a)
+{
+  g_return_if_fail (hsva != NULL);
+
+  hsva->h = h;
+  hsva->s = s;
+  hsva->v = v;
+  hsva->a = a;
+}
diff --git a/libgimpcolor/gimphsv.h b/libgimpcolor/gimphsv.h
new file mode 100644
index 0000000..7063d7b
--- /dev/null
+++ b/libgimpcolor/gimphsv.h
@@ -0,0 +1,54 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_COLOR_H_INSIDE__) && !defined (GIMP_COLOR_COMPILATION)
+#error "Only <libgimpcolor/gimpcolor.h> can be included directly."
+#endif
+
+#ifndef __GIMP_HSV_H__
+#define __GIMP_HSV_H__
+
+G_BEGIN_DECLS
+
+/* For information look into the C source or the html documentation */
+
+
+/*
+ * GIMP_TYPE_HSV
+ */
+
+#define GIMP_TYPE_HSV       (gimp_hsv_get_type ())
+
+GType   gimp_hsv_get_type   (void) G_GNUC_CONST;
+
+void    gimp_hsv_set        (GimpHSV       *hsv,
+                             gdouble        hue,
+                             gdouble        saturation,
+                             gdouble        value);
+void    gimp_hsv_clamp      (GimpHSV       *hsv);
+
+void    gimp_hsva_set       (GimpHSV       *hsva,
+                             gdouble        hue,
+                             gdouble        saturation,
+                             gdouble        value,
+                             gdouble        alpha);
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_HSV_H__ */
diff --git a/libgimpcolor/gimppixbuf.c b/libgimpcolor/gimppixbuf.c
new file mode 100644
index 0000000..235b84d
--- /dev/null
+++ b/libgimpcolor/gimppixbuf.c
@@ -0,0 +1,152 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * gimppixbuf.c
+ * Copyright (C) 2012  Michael Natterer <mitch@gimp.org>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "gimpcolortypes.h"
+
+#include "gimppixbuf.h"
+
+
+/**
+ * SECTION: gimppixbuf
+ * @title: GimpPixbuf
+ * @short_description: Definitions and Functions relating to GdkPixbuf.
+ *
+ * Definitions and Functions relating to GdkPixbuf.
+ **/
+
+/**
+ * gimp_pixbuf_get_format:
+ * @pixbuf: a #GdkPixbuf
+ *
+ * Returns the Babl format that corresponds to the @pixbuf's pixel format.
+ *
+ * Return value: the @pixbuf's pixel format
+ *
+ * Since: 2.10
+ **/
+const Babl *
+gimp_pixbuf_get_format (GdkPixbuf *pixbuf)
+{
+  g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
+
+  switch (gdk_pixbuf_get_n_channels (pixbuf))
+    {
+    case 3: return babl_format ("R'G'B' u8");
+    case 4: return babl_format ("R'G'B'A u8");
+    }
+
+  g_return_val_if_reached (NULL);
+}
+
+/**
+ * gimp_pixbuf_create_buffer:
+ * @pixbuf: a #GdkPixbuf
+ *
+ * Returns a #GeglBuffer that's either backed by the @pixbuf's pixels,
+ * or a copy of them. This function tries to not copy the @pixbuf's
+ * pixels. If the pixbuf's rowstride is a multiple of its bpp, a
+ * simple reference to the @pixbuf's pixels is made and @pixbuf will
+ * be kept around for as long as the buffer exists; otherwise the
+ * pixels are copied.
+ *
+ * Return value: a new #GeglBuffer.
+ *
+ * Since: 2.10
+ **/
+GeglBuffer *
+gimp_pixbuf_create_buffer (GdkPixbuf *pixbuf)
+{
+  gint width;
+  gint height;
+  gint rowstride;
+  gint bpp;
+
+  g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
+
+  width     = gdk_pixbuf_get_width (pixbuf);
+  height    = gdk_pixbuf_get_height (pixbuf);
+  rowstride = gdk_pixbuf_get_rowstride (pixbuf);
+  bpp       = gdk_pixbuf_get_n_channels (pixbuf);
+
+  if ((rowstride % bpp) == 0)
+    {
+      return gegl_buffer_linear_new_from_data (gdk_pixbuf_get_pixels (pixbuf),
+                                               gimp_pixbuf_get_format (pixbuf),
+                                               GEGL_RECTANGLE (0, 0,
+                                                               width, height),
+                                               rowstride,
+                                               (GDestroyNotify) g_object_unref,
+                                               g_object_ref (pixbuf));
+    }
+  else
+    {
+      GeglBuffer *buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
+                                                            width, height),
+                                            gimp_pixbuf_get_format (pixbuf));
+
+      gegl_buffer_set (buffer, NULL, 0, NULL,
+                       gdk_pixbuf_get_pixels (pixbuf),
+                       gdk_pixbuf_get_rowstride (pixbuf));
+
+      return buffer;
+    }
+}
+
+/**
+ * gimp_pixbuf_get_icc_profile:
+ * @pixbuf: a #GdkPixbuf
+ * @length: return location for the ICC profile's length
+ *
+ * Returns the ICC profile attached to the @pixbuf, or %NULL if there
+ * is none.
+ *
+ * Return value: The ICC profile data, or %NULL. The value should be freed
+ *               with g_free().
+ *
+ * Since: 2.10
+ **/
+guint8 *
+gimp_pixbuf_get_icc_profile (GdkPixbuf *pixbuf,
+                             gsize     *length)
+{
+  const gchar *icc_base64;
+
+  g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
+  g_return_val_if_fail (length != NULL, NULL);
+
+  icc_base64 = gdk_pixbuf_get_option (pixbuf, "icc-profile");
+
+  if (icc_base64)
+    {
+      guint8 *icc_data;
+
+      icc_data = g_base64_decode (icc_base64, length);
+
+      return icc_data;
+    }
+
+  return NULL;
+}
diff --git a/libgimpcolor/gimppixbuf.h b/libgimpcolor/gimppixbuf.h
new file mode 100644
index 0000000..6cc590c
--- /dev/null
+++ b/libgimpcolor/gimppixbuf.h
@@ -0,0 +1,43 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * gimppixbuf.h
+ * Copyright (C) 2012  Michael Natterer <mitch@gimp.org>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_COLOR_H_INSIDE__) && !defined (GIMP_COLOR_COMPILATION)
+#error "Only <libgimpcolor/gimpcolor.h> can be included directly."
+#endif
+
+#ifndef __GIMP_PIXBUF_H__
+#define __GIMP_PIXBUF_H__
+
+G_BEGIN_DECLS
+
+/* For information look into the C source or the html documentation */
+
+
+const Babl * gimp_pixbuf_get_format      (GdkPixbuf *pixbuf);
+GeglBuffer * gimp_pixbuf_create_buffer   (GdkPixbuf *pixbuf);
+
+guint8     * gimp_pixbuf_get_icc_profile (GdkPixbuf *pixbuf,
+                                          gsize     *length);
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_PIXBUF_H__ */
diff --git a/libgimpcolor/gimprgb-parse.c b/libgimpcolor/gimprgb-parse.c
new file mode 100644
index 0000000..ba16432
--- /dev/null
+++ b/libgimpcolor/gimprgb-parse.c
@@ -0,0 +1,651 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimprgb-parse.c
+ * Copyright (C) 2004  Sven Neumann <sven@gimp.org>
+ *
+ * Some of the code in here was inspired and partly copied from pango
+ * and librsvg.
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <babl/babl.h>
+#include <glib-object.h>
+
+#include "gimpcolortypes.h"
+
+#include "gimpcolorspace.h"
+#include "gimprgb.h"
+
+
+static gchar    * gimp_rgb_parse_strip         (const gchar *str,
+                                                gint         len);
+
+static gboolean   gimp_rgb_parse_name_internal (GimpRGB     *rgb,
+                                                const gchar *name);
+static gboolean   gimp_rgb_parse_hex_internal  (GimpRGB     *rgb,
+                                                const gchar *hex);
+static gboolean   gimp_rgb_parse_css_internal  (GimpRGB     *rgb,
+                                                const gchar *css);
+static gboolean   gimp_rgba_parse_css_internal (GimpRGB     *rgb,
+                                                const gchar *css);
+
+
+typedef struct
+{
+  const gchar  *name;
+  const guchar  red;
+  const guchar  green;
+  const guchar  blue;
+} ColorEntry;
+
+static const ColorEntry named_colors[] =
+{
+  { "aliceblue",             240, 248, 255 },
+  { "antiquewhite",          250, 235, 215 },
+  { "aqua",                    0, 255, 255 },
+  { "aquamarine",            127, 255, 212 },
+  { "azure",                 240, 255, 255 },
+  { "beige",                 245, 245, 220 },
+  { "bisque",                255, 228, 196 },
+  { "black",                   0,   0,   0 },
+  { "blanchedalmond",        255, 235, 205 },
+  { "blue",                    0,   0, 255 },
+  { "blueviolet",            138,  43, 226 },
+  { "brown",                 165,  42,  42 },
+  { "burlywood",             222, 184, 135 },
+  { "cadetblue",              95, 158, 160 },
+  { "chartreuse",            127, 255,   0 },
+  { "chocolate",             210, 105,  30 },
+  { "coral",                 255, 127,  80 },
+  { "cornflowerblue",        100, 149, 237 },
+  { "cornsilk",              255, 248, 220 },
+  { "crimson",               220,  20,  60 },
+  { "cyan",                    0, 255, 255 },
+  { "darkblue",                0,   0, 139 },
+  { "darkcyan",                0, 139, 139 },
+  { "darkgoldenrod",         184, 134,  11 },
+  { "darkgray",              169, 169, 169 },
+  { "darkgreen",               0, 100,   0 },
+  { "darkgrey",              169, 169, 169 },
+  { "darkkhaki",             189, 183, 107 },
+  { "darkmagenta",           139,   0, 139 },
+  { "darkolivegreen",         85, 107,  47 },
+  { "darkorange",            255, 140,   0 },
+  { "darkorchid",            153,  50, 204 },
+  { "darkred",               139,   0,   0 },
+  { "darksalmon",            233, 150, 122 },
+  { "darkseagreen",          143, 188, 143 },
+  { "darkslateblue",          72,  61, 139 },
+  { "darkslategray",          47,  79,  79 },
+  { "darkslategrey",          47,  79,  79 },
+  { "darkturquoise",           0, 206, 209 },
+  { "darkviolet",            148,   0, 211 },
+  { "deeppink",              255,  20, 147 },
+  { "deepskyblue",             0, 191, 255 },
+  { "dimgray",               105, 105, 105 },
+  { "dimgrey",               105, 105, 105 },
+  { "dodgerblue",             30, 144, 255 },
+  { "firebrick",             178,  34,  34 },
+  { "floralwhite" ,          255, 250, 240 },
+  { "forestgreen",            34, 139,  34 },
+  { "fuchsia",               255,   0, 255 },
+  { "gainsboro",             220, 220, 220 },
+  { "ghostwhite",            248, 248, 255 },
+  { "gold",                  255, 215,   0 },
+  { "goldenrod",             218, 165,  32 },
+  { "gray",                  128, 128, 128 },
+  { "green",                   0, 128,   0 },
+  { "greenyellow",           173, 255,  47 },
+  { "grey",                  128, 128, 128 },
+  { "honeydew",              240, 255, 240 },
+  { "hotpink",               255, 105, 180 },
+  { "indianred",             205,  92,  92 },
+  { "indigo",                 75,   0, 130 },
+  { "ivory",                 255, 255, 240 },
+  { "khaki",                 240, 230, 140 },
+  { "lavender",              230, 230, 250 },
+  { "lavenderblush",         255, 240, 245 },
+  { "lawngreen",             124, 252,   0 },
+  { "lemonchiffon",          255, 250, 205 },
+  { "lightblue",             173, 216, 230 },
+  { "lightcoral",            240, 128, 128 },
+  { "lightcyan",             224, 255, 255 },
+  { "lightgoldenrodyellow",  250, 250, 210 },
+  { "lightgray",             211, 211, 211 },
+  { "lightgreen",            144, 238, 144 },
+  { "lightgrey",             211, 211, 211 },
+  { "lightpink",             255, 182, 193 },
+  { "lightsalmon",           255, 160, 122 },
+  { "lightseagreen",          32, 178, 170 },
+  { "lightskyblue",          135, 206, 250 },
+  { "lightslategray",        119, 136, 153 },
+  { "lightslategrey",        119, 136, 153 },
+  { "lightsteelblue",        176, 196, 222 },
+  { "lightyellow",           255, 255, 224 },
+  { "lime",                    0, 255,   0 },
+  { "limegreen",              50, 205,  50 },
+  { "linen",                 250, 240, 230 },
+  { "magenta",               255,   0, 255 },
+  { "maroon",                128,   0,   0 },
+  { "mediumaquamarine",      102, 205, 170 },
+  { "mediumblue",              0,   0, 205 },
+  { "mediumorchid",          186,  85, 211 },
+  { "mediumpurple",          147, 112, 219 },
+  { "mediumseagreen",         60, 179, 113 },
+  { "mediumslateblue",       123, 104, 238 },
+  { "mediumspringgreen",       0, 250, 154 },
+  { "mediumturquoise",        72, 209, 204 },
+  { "mediumvioletred",       199,  21, 133 },
+  { "midnightblue",           25,  25, 112 },
+  { "mintcream",             245, 255, 250 },
+  { "mistyrose",             255, 228, 225 },
+  { "moccasin",              255, 228, 181 },
+  { "navajowhite",           255, 222, 173 },
+  { "navy",                    0,   0, 128 },
+  { "oldlace",               253, 245, 230 },
+  { "olive",                 128, 128,   0 },
+  { "olivedrab",             107, 142,  35 },
+  { "orange",                255, 165,   0 },
+  { "orangered",             255,  69,   0 },
+  { "orchid",                218, 112, 214 },
+  { "palegoldenrod",         238, 232, 170 },
+  { "palegreen",             152, 251, 152 },
+  { "paleturquoise",         175, 238, 238 },
+  { "palevioletred",         219, 112, 147 },
+  { "papayawhip",            255, 239, 213 },
+  { "peachpuff",             255, 218, 185 },
+  { "peru",                  205, 133,  63 },
+  { "pink",                  255, 192, 203 },
+  { "plum",                  221, 160, 221 },
+  { "powderblue",            176, 224, 230 },
+  { "purple",                128,   0, 128 },
+  { "red",                   255,   0,   0 },
+  { "rosybrown",             188, 143, 143 },
+  { "royalblue",              65, 105, 225 },
+  { "saddlebrown",           139,  69,  19 },
+  { "salmon",                250, 128, 114 },
+  { "sandybrown",            244, 164,  96 },
+  { "seagreen",               46, 139,  87 },
+  { "seashell",              255, 245, 238 },
+  { "sienna",                160,  82,  45 },
+  { "silver",                192, 192, 192 },
+  { "skyblue",               135, 206, 235 },
+  { "slateblue",             106,  90, 205 },
+  { "slategray",             112, 128, 144 },
+  { "slategrey",             112, 128, 144 },
+  { "snow",                  255, 250, 250 },
+  { "springgreen",             0, 255, 127 },
+  { "steelblue",              70, 130, 180 },
+  { "tan",                   210, 180, 140 },
+  { "teal",                    0, 128, 128 },
+  { "thistle",               216, 191, 216 },
+  { "tomato",                255,  99,  71 },
+  { "turquoise",              64, 224, 208 },
+  { "violet",                238, 130, 238 },
+  { "wheat",                 245, 222, 179 },
+  { "white",                 255, 255, 255 },
+  { "whitesmoke",            245, 245, 245 },
+  { "yellow",                255, 255,   0 },
+  { "yellowgreen",           154, 205,  50 }
+};
+
+
+/**
+ * gimp_rgb_parse_name:
+ * @rgb:  a #GimpRGB struct used to return the parsed color
+ * @name: a color name (in UTF-8 encoding)
+ * @len:  the length of @name, in bytes. or -1 if @name is nul-terminated
+ *
+ * Attempts to parse a color name. This function accepts <ulink
+ * url="https://www.w3.org/TR/SVG/types.html#ColorKeywords">SVG 1.0
+ * color keywords</ulink>.
+ *
+ * This function does not touch the alpha component of @rgb.
+ *
+ * Return value: %TRUE if @name was parsed successfully and @rgb has
+ *               been set, %FALSE otherwise
+ *
+ * Since: 2.2
+ **/
+gboolean
+gimp_rgb_parse_name (GimpRGB     *rgb,
+                     const gchar *name,
+                     gint         len)
+{
+  gchar    *tmp;
+  gboolean  result;
+
+  g_return_val_if_fail (rgb != NULL, FALSE);
+  g_return_val_if_fail (name != NULL, FALSE);
+
+  tmp = gimp_rgb_parse_strip (name, len);
+
+  result = gimp_rgb_parse_name_internal (rgb, tmp);
+
+  g_free (tmp);
+
+  return result;
+}
+
+/**
+ * gimp_rgb_parse_hex:
+ * @rgb: a #GimpRGB struct used to return the parsed color
+ * @hex: a string describing a color in hexadecimal notation
+ * @len: the length of @hex, in bytes. or -1 if @hex is nul-terminated
+ *
+ * Attempts to parse a string describing an RGB color in hexadecimal
+ * notation (optionally prefixed with a '#').
+ *
+ * This function does not touch the alpha component of @rgb.
+ *
+ * Return value: %TRUE if @hex was parsed successfully and @rgb has
+ *               been set, %FALSE otherwise
+ *
+ * Since: 2.2
+ **/
+gboolean
+gimp_rgb_parse_hex (GimpRGB     *rgb,
+                    const gchar *hex,
+                    gint         len)
+{
+  gchar    *tmp;
+  gboolean  result;
+
+  g_return_val_if_fail (rgb != NULL, FALSE);
+  g_return_val_if_fail (hex != NULL, FALSE);
+
+  tmp = gimp_rgb_parse_strip (hex, len);
+
+  result = gimp_rgb_parse_hex_internal (rgb, tmp);
+
+  g_free (tmp);
+
+  return result;
+}
+
+/**
+ * gimp_rgb_parse_css:
+ * @rgb: a #GimpRGB struct used to return the parsed color
+ * @css: a string describing a color in CSS notation
+ * @len: the length of @hex, in bytes. or -1 if @hex is nul-terminated
+ *
+ * Attempts to parse a string describing an RGB color in CSS
+ * notation. This can be either a numerical representation
+ * (<code>rgb(255,0,0)</code> or <code>rgb(100%,0%,0%)</code>)
+ * or a hexadecimal notation as parsed by gimp_rgb_parse_hex()
+ * (<code>##ff0000</code>) or a color name as parsed by
+ * gimp_rgb_parse_name() (<code>red</code>).
+ *
+ * This function does not touch the alpha component of @rgb.
+ *
+ * Return value: %TRUE if @css was parsed successfully and @rgb has been
+ *               set, %FALSE otherwise
+ *
+ * Since: 2.2
+ **/
+gboolean
+gimp_rgb_parse_css (GimpRGB     *rgb,
+                    const gchar *css,
+                    gint         len)
+{
+  gchar    *tmp;
+  gboolean  result;
+
+  g_return_val_if_fail (rgb != NULL, FALSE);
+  g_return_val_if_fail (css != NULL, FALSE);
+
+  tmp = gimp_rgb_parse_strip (css, len);
+
+  result = gimp_rgb_parse_css_internal (rgb, tmp);
+
+  g_free (tmp);
+
+  return result;
+}
+
+/**
+ * gimp_rgba_parse_css:
+ * @rgba: a #GimpRGB struct used to return the parsed color
+ * @css: a string describing a color in CSS notation
+ * @len: the length of @hex, in bytes. or -1 if @hex is nul-terminated
+ *
+ * Similar to gimp_rgb_parse_css() but handles RGB colors with alpha
+ * channel in the numerical CSS notation (<code>rgba(255,0,0,255)</code>
+ * or <code>rgba(100%,0%,0%,1000%)</code>).
+ *
+ * It doesn't handle the hexadecimal notation or color names because
+ * they leave the alpha channel unspecified.
+ *
+ * Return value: %TRUE if @css was parsed successfully and @rgb has been
+ *               set, %FALSE otherwise
+ *
+ * Since: 2.2
+ **/
+gboolean
+gimp_rgba_parse_css (GimpRGB     *rgba,
+                     const gchar *css,
+                     gint         len)
+{
+  gchar    *tmp;
+  gboolean  result;
+
+  g_return_val_if_fail (rgba != NULL, FALSE);
+  g_return_val_if_fail (css != NULL, FALSE);
+
+  if (len < 0)
+    len = strlen (css);
+
+  tmp = gimp_rgb_parse_strip (css, len);
+
+  if (strcmp (tmp, "transparent") == 0)
+    {
+      gimp_rgba_set (rgba, 0.0, 0.0, 0.0, 0.0);
+      result = TRUE;
+    }
+  else
+    {
+      result = gimp_rgba_parse_css_internal (rgba, tmp);
+    }
+
+  g_free (tmp);
+
+  return result;
+}
+
+
+/**
+ * gimp_rgb_list_names:
+ * @names:  return location for an array of color names
+ * @colors: return location for an array of GimpRGB structs
+ *
+ * Returns the list of <ulink
+ * url="https://www.w3.org/TR/SVG/types.html">SVG 1.0 color
+ * keywords</ulink> that is used by gimp_rgb_parse_name().
+ *
+ * The returned strings are const and must not be freed. Only the two
+ * arrays are allocated dynamically. You must call g_free() on the
+ * @names and @colors arrays when they are not any longer needed.
+ *
+ * Return value: the number of named colors
+ *               (i.e. the length of the returned arrays)
+ *
+ * Since: 2.2
+ **/
+gint
+gimp_rgb_list_names (const gchar ***names,
+                     GimpRGB      **colors)
+{
+  gint i;
+
+  g_return_val_if_fail (names != NULL, 0);
+  g_return_val_if_fail (colors != NULL, 0);
+
+  *names  = g_new (const gchar *, G_N_ELEMENTS (named_colors));
+  *colors = g_new (GimpRGB, G_N_ELEMENTS (named_colors));
+
+  for (i = 0; i < G_N_ELEMENTS (named_colors); i++)
+    {
+      (*names)[i] = named_colors[i].name;
+
+      gimp_rgba_set_uchar ((*colors) + i,
+                           named_colors[i].red,
+                           named_colors[i].green,
+                           named_colors[i].blue,
+                           0xFF);
+    }
+
+  return G_N_ELEMENTS (named_colors);
+}
+
+
+static gchar *
+gimp_rgb_parse_strip (const gchar *str,
+                      gint         len)
+{
+  gchar *result;
+
+  while (len > 0 && g_ascii_isspace (*str))
+    {
+      str++;
+      len--;
+    }
+
+  if (len < 0)
+    {
+      while (g_ascii_isspace (*str))
+        str++;
+
+      len = strlen (str);
+    }
+
+  while (len > 0 && g_ascii_isspace (str[len - 1]))
+    len--;
+
+  result = g_malloc (len + 1);
+
+  memcpy (result, str, len);
+  result[len] = '\0';
+
+  return result;
+}
+
+static gint
+gimp_rgb_color_entry_compare (gconstpointer a,
+                              gconstpointer b)
+{
+  const gchar      *name  = a;
+  const ColorEntry *entry = b;
+
+  return g_ascii_strcasecmp (name, entry->name);
+}
+
+static gboolean
+gimp_rgb_parse_name_internal (GimpRGB     *rgb,
+                              const gchar *name)
+{
+  ColorEntry *entry = bsearch (name, named_colors,
+                               G_N_ELEMENTS (named_colors), sizeof (ColorEntry),
+                               gimp_rgb_color_entry_compare);
+
+  if (entry)
+    {
+      gimp_rgb_set_uchar (rgb, entry->red, entry->green, entry->blue);
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+
+static gboolean
+gimp_rgb_parse_hex_component (const gchar *hex,
+                              gint         len,
+                              gdouble     *value)
+{
+  gint  i;
+  guint c = 0;
+
+  for (i = 0; i < len; i++, hex++)
+    {
+      if (!*hex || !g_ascii_isxdigit (*hex))
+        return FALSE;
+
+      c = (c << 4) | g_ascii_xdigit_value (*hex);
+    }
+
+  switch (len)
+    {
+    case 1: *value = (gdouble) c /    15.0;  break;
+    case 2: *value = (gdouble) c /   255.0;  break;
+    case 3: *value = (gdouble) c /  4095.0;  break;
+    case 4: *value = (gdouble) c / 65535.0;  break;
+    default:
+      g_return_val_if_reached (FALSE);
+    }
+
+  return TRUE;
+}
+
+static gboolean
+gimp_rgb_parse_hex_internal (GimpRGB     *rgb,
+                             const gchar *hex)
+{
+  gint     i;
+  gsize    len;
+  gdouble  val[3];
+
+  if (hex[0] == '#')
+    hex++;
+
+  len = strlen (hex);
+  if (len % 3 || len < 3 || len > 12)
+    return FALSE;
+
+  len /= 3;
+
+  for (i = 0; i < 3; i++, hex += len)
+    {
+      if (! gimp_rgb_parse_hex_component (hex, len, val + i))
+        return FALSE;
+    }
+
+  gimp_rgb_set (rgb, val[0], val[1], val[2]);
+
+  return TRUE;
+}
+
+
+static gboolean
+gimp_rgb_parse_css_numeric (GimpRGB     *rgb,
+                            const gchar *css)
+{
+  gdouble   values[4];
+  gboolean  alpha;
+  gboolean  hsl;
+  gint      i;
+
+  if (css[0] == 'r' && css[1] == 'g' && css[2] == 'b')
+    hsl = FALSE;
+  else if (css[0] == 'h' && css[1] == 's' && css[2] == 'l')
+    hsl = TRUE;
+  else
+    return FALSE;
+
+  if (css[3] == 'a' && css[4] == '(')
+    alpha = TRUE;
+else if (css[3] == '(')
+    alpha = FALSE;
+  else
+    return FALSE;
+
+  css += (alpha ? 5 : 4);
+
+  for (i = 0; i < (alpha ? 4 : 3); i++)
+    {
+      const gchar *end = css;
+
+      while (*end && *end != ',' && *end != '%' && *end != ')')
+        end++;
+
+      if (i == 3 || *end == '%')
+        {
+          values[i] = g_ascii_strtod (css, (gchar **) &end);
+
+          if (errno == ERANGE)
+            return FALSE;
+
+          if (*end == '%')
+            {
+              end++;
+              values[i] /= 100.0;
+            }
+        }
+      else
+        {
+          glong  value = strtol (css, (gchar **) &end, 10);
+
+          if (errno == ERANGE)
+            return FALSE;
+
+          if (hsl)
+            values[i] = value / (i == 0 ? 360.0 : 100.0);
+          else
+            values[i] = value / 255.0;
+        }
+
+      while (*end == ',' || g_ascii_isspace (*end))
+        end++;
+
+      css = end;
+    }
+
+  if (*css != ')')
+    return FALSE;
+
+  if (alpha)
+    gimp_rgba_set (rgb, values[0], values[1], values[2], values[3]);
+  else
+    gimp_rgb_set (rgb, values[0], values[1], values[2]);
+
+  gimp_rgb_clamp (rgb);
+
+  if (hsl)
+    {
+      GimpHSL  tmp = (*((GimpHSL *) rgb));
+
+      gimp_hsl_to_rgb (&tmp, rgb);
+    }
+
+  return TRUE;
+}
+
+static gboolean
+gimp_rgb_parse_css_internal (GimpRGB     *rgb,
+                             const gchar *css)
+{
+  if (css[0] == '#')
+    {
+      return gimp_rgb_parse_hex_internal (rgb, css);
+    }
+  else if (strncmp (css, "rgb(", 4) == 0 ||
+           strncmp (css, "hsl(", 4) == 0)
+    {
+      return gimp_rgb_parse_css_numeric (rgb, css);
+    }
+  else
+    {
+      return gimp_rgb_parse_name_internal (rgb, css);
+    }
+}
+
+static gboolean
+gimp_rgba_parse_css_internal (GimpRGB     *rgba,
+                              const gchar *css)
+{
+  if (strncmp (css, "rgba(", 5) != 0 &&
+      strncmp (css, "hsla(", 5) != 0)
+    return FALSE;
+
+  return gimp_rgb_parse_css_numeric (rgba, css);
+}
diff --git a/libgimpcolor/gimprgb.c b/libgimpcolor/gimprgb.c
new file mode 100644
index 0000000..b9ab4be
--- /dev/null
+++ b/libgimpcolor/gimprgb.c
@@ -0,0 +1,846 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <babl/babl.h>
+#include <glib-object.h>
+
+#define GIMP_DISABLE_DEPRECATION_WARNINGS /*  for GIMP_RGB_INTENSITY()  */
+#include "libgimpmath/gimpmath.h"
+
+#include "gimpcolortypes.h"
+
+#undef GIMP_DISABLE_DEPRECATED  /*  for GIMP_RGB_INTENSITY()  */
+#include "gimprgb.h"
+
+
+/**
+ * SECTION: gimprgb
+ * @title: GimpRGB
+ * @short_description: Definitions and Functions relating to RGB colors.
+ *
+ * Definitions and Functions relating to RGB colors.
+ **/
+
+
+/*
+ * GIMP_TYPE_RGB
+ */
+
+static GimpRGB * gimp_rgb_copy (const GimpRGB *rgb);
+
+
+GType
+gimp_rgb_get_type (void)
+{
+  static GType rgb_type = 0;
+
+  if (!rgb_type)
+    rgb_type = g_boxed_type_register_static ("GimpRGB",
+                                             (GBoxedCopyFunc) gimp_rgb_copy,
+                                             (GBoxedFreeFunc) g_free);
+
+  return rgb_type;
+}
+
+void
+gimp_value_get_rgb (const GValue *value,
+                    GimpRGB      *rgb)
+{
+  g_return_if_fail (GIMP_VALUE_HOLDS_RGB (value));
+  g_return_if_fail (rgb != NULL);
+
+  if (value->data[0].v_pointer)
+    *rgb = *((GimpRGB *) value->data[0].v_pointer);
+  else
+    gimp_rgba_set (rgb, 0.0, 0.0, 0.0, 1.0);
+}
+
+void
+gimp_value_set_rgb (GValue        *value,
+                    const GimpRGB *rgb)
+{
+  g_return_if_fail (GIMP_VALUE_HOLDS_RGB (value));
+  g_return_if_fail (rgb != NULL);
+
+  g_value_set_boxed (value, rgb);
+}
+
+static GimpRGB *
+gimp_rgb_copy (const GimpRGB *rgb)
+{
+  return g_memdup (rgb, sizeof (GimpRGB));
+}
+
+
+/*  RGB functions  */
+
+/**
+ * gimp_rgb_set:
+ * @rgb:   a #GimpRGB struct
+ * @red:   the red component
+ * @green: the green component
+ * @blue:  the blue component
+ *
+ * Sets the red, green and blue components of @rgb and leaves the
+ * alpha component unchanged. The color values should be between 0.0
+ * and 1.0 but there is no check to enforce this and the values are
+ * set exactly as they are passed in.
+ **/
+void
+gimp_rgb_set (GimpRGB *rgb,
+              gdouble  r,
+              gdouble  g,
+              gdouble  b)
+{
+  g_return_if_fail (rgb != NULL);
+
+  rgb->r = r;
+  rgb->g = g;
+  rgb->b = b;
+}
+
+/**
+ * gimp_rgb_set_alpha:
+ * @rgb:   a #GimpRGB struct
+ * @alpha: the alpha component
+ *
+ * Sets the alpha component of @rgb and leaves the RGB components unchanged.
+ **/
+void
+gimp_rgb_set_alpha (GimpRGB *rgb,
+                    gdouble  a)
+{
+  g_return_if_fail (rgb != NULL);
+
+  rgb->a = a;
+}
+
+/**
+ * gimp_rgb_set_pixel:
+ * @rgb:    a #GimpRGB struct
+ * @format: a Babl format
+ * @pixel:  pointer to the source pixel
+ *
+ * Sets the red, green and blue components of @rgb from the color
+ * stored in @pixel. The pixel format of @pixel is determined by
+ * @format.
+ *
+ * Since: 2.10
+ **/
+void
+gimp_rgb_set_pixel (GimpRGB       *rgb,
+                    const Babl    *format,
+                    gconstpointer  pixel)
+{
+  g_return_if_fail (rgb != NULL);
+  g_return_if_fail (format != NULL);
+  g_return_if_fail (pixel != NULL);
+
+  babl_process (babl_fish (format,
+                           babl_format ("R'G'B' double")),
+                pixel, rgb, 1);
+}
+
+/**
+ * gimp_rgb_get_pixel:
+ * @rgb:    a #GimpRGB struct
+ * @format: a Babl format
+ * @pixel:  pointer to the destination pixel
+ *
+ * Writes the red, green, blue and alpha components of @rgb to the
+ * color stored in @pixel. The pixel format of @pixel is determined by
+ * @format.
+ *
+ * Since: 2.10
+ **/
+void
+gimp_rgb_get_pixel (const GimpRGB *rgb,
+                    const Babl    *format,
+                    gpointer       pixel)
+{
+  g_return_if_fail (rgb != NULL);
+  g_return_if_fail (format != NULL);
+  g_return_if_fail (pixel != NULL);
+
+  babl_process (babl_fish (babl_format ("R'G'B' double"),
+                           format),
+                rgb, pixel, 1);
+}
+
+/**
+ * gimp_rgb_set_uchar:
+ * @rgb:   a #GimpRGB struct
+ * @red:   the red component
+ * @green: the green component
+ * @blue:  the blue component
+ *
+ * Sets the red, green and blue components of @rgb from 8bit values
+ * (0 to 255) and leaves the alpha component unchanged.
+ **/
+void
+gimp_rgb_set_uchar (GimpRGB *rgb,
+                    guchar   r,
+                    guchar   g,
+                    guchar   b)
+{
+  g_return_if_fail (rgb != NULL);
+
+  rgb->r = (gdouble) r / 255.0;
+  rgb->g = (gdouble) g / 255.0;
+  rgb->b = (gdouble) b / 255.0;
+}
+
+void
+gimp_rgb_get_uchar (const GimpRGB *rgb,
+                    guchar        *r,
+                    guchar        *g,
+                    guchar        *b)
+{
+  g_return_if_fail (rgb != NULL);
+
+  if (r) *r = ROUND (CLAMP (rgb->r, 0.0, 1.0) * 255.0);
+  if (g) *g = ROUND (CLAMP (rgb->g, 0.0, 1.0) * 255.0);
+  if (b) *b = ROUND (CLAMP (rgb->b, 0.0, 1.0) * 255.0);
+}
+
+void
+gimp_rgb_add (GimpRGB       *rgb1,
+              const GimpRGB *rgb2)
+{
+  g_return_if_fail (rgb1 != NULL);
+  g_return_if_fail (rgb2 != NULL);
+
+  rgb1->r += rgb2->r;
+  rgb1->g += rgb2->g;
+  rgb1->b += rgb2->b;
+}
+
+void
+gimp_rgb_subtract (GimpRGB       *rgb1,
+                   const GimpRGB *rgb2)
+{
+  g_return_if_fail (rgb1 != NULL);
+  g_return_if_fail (rgb2 != NULL);
+
+  rgb1->r -= rgb2->r;
+  rgb1->g -= rgb2->g;
+  rgb1->b -= rgb2->b;
+}
+
+void
+gimp_rgb_multiply (GimpRGB *rgb,
+                   gdouble  factor)
+{
+  g_return_if_fail (rgb != NULL);
+
+  rgb->r *= factor;
+  rgb->g *= factor;
+  rgb->b *= factor;
+}
+
+gdouble
+gimp_rgb_distance (const GimpRGB *rgb1,
+                   const GimpRGB *rgb2)
+{
+  g_return_val_if_fail (rgb1 != NULL, 0.0);
+  g_return_val_if_fail (rgb2 != NULL, 0.0);
+
+  return (fabs (rgb1->r - rgb2->r) +
+          fabs (rgb1->g - rgb2->g) +
+          fabs (rgb1->b - rgb2->b));
+}
+
+gdouble
+gimp_rgb_max (const GimpRGB *rgb)
+{
+  g_return_val_if_fail (rgb != NULL, 0.0);
+
+  if (rgb->r > rgb->g)
+    return (rgb->r > rgb->b) ? rgb->r : rgb->b;
+  else
+    return (rgb->g > rgb->b) ? rgb->g : rgb->b;
+}
+
+gdouble
+gimp_rgb_min (const GimpRGB *rgb)
+{
+  g_return_val_if_fail (rgb != NULL, 0.0);
+
+  if (rgb->r < rgb->g)
+    return (rgb->r < rgb->b) ? rgb->r : rgb->b;
+  else
+    return (rgb->g < rgb->b) ? rgb->g : rgb->b;
+}
+
+void
+gimp_rgb_clamp (GimpRGB *rgb)
+{
+  g_return_if_fail (rgb != NULL);
+
+  rgb->r = CLAMP (rgb->r, 0.0, 1.0);
+  rgb->g = CLAMP (rgb->g, 0.0, 1.0);
+  rgb->b = CLAMP (rgb->b, 0.0, 1.0);
+  rgb->a = CLAMP (rgb->a, 0.0, 1.0);
+}
+
+void
+gimp_rgb_gamma (GimpRGB *rgb,
+                gdouble  gamma)
+{
+  gdouble ig;
+
+  g_return_if_fail (rgb != NULL);
+
+  if (gamma != 0.0)
+    ig = 1.0 / gamma;
+  else
+    ig = 0.0;
+
+  rgb->r = pow (rgb->r, ig);
+  rgb->g = pow (rgb->g, ig);
+  rgb->b = pow (rgb->b, ig);
+}
+
+/**
+ * gimp_rgb_luminance:
+ * @rgb: a #GimpRGB struct
+ *
+ * Return value: the luminous intensity of the range from 0.0 to 1.0.
+ *
+ * Since: 2.4
+ **/
+gdouble
+gimp_rgb_luminance (const GimpRGB *rgb)
+{
+  gdouble luminance;
+
+  g_return_val_if_fail (rgb != NULL, 0.0);
+
+  luminance = GIMP_RGB_LUMINANCE (rgb->r, rgb->g, rgb->b);
+
+  return CLAMP (luminance, 0.0, 1.0);
+}
+
+/**
+ * gimp_rgb_luminance_uchar:
+ * @rgb: a #GimpRGB struct
+ *
+ * Return value: the luminous intensity in the range from 0 to 255.
+ *
+ * Since: 2.4
+ **/
+guchar
+gimp_rgb_luminance_uchar (const GimpRGB *rgb)
+{
+  g_return_val_if_fail (rgb != NULL, 0);
+
+  return ROUND (gimp_rgb_luminance (rgb) * 255.0);
+}
+
+/**
+ * gimp_rgb_intensity:
+ * @rgb: a #GimpRGB struct
+ *
+ * This function is deprecated! Use gimp_rgb_luminance() instead.
+ *
+ * Return value: the intensity in the range from 0.0 to 1.0.
+ **/
+gdouble
+gimp_rgb_intensity (const GimpRGB *rgb)
+{
+  gdouble intensity;
+
+  g_return_val_if_fail (rgb != NULL, 0.0);
+
+  intensity = GIMP_RGB_INTENSITY (rgb->r, rgb->g, rgb->b);
+
+  return CLAMP (intensity, 0.0, 1.0);
+}
+
+/**
+ * gimp_rgb_intensity_uchar:
+ * @rgb: a #GimpRGB struct
+ *
+ * This function is deprecated! Use gimp_rgb_luminance_uchar() instead.
+ *
+ * Return value: the intensity in the range from 0 to 255.
+ **/
+guchar
+gimp_rgb_intensity_uchar (const GimpRGB *rgb)
+{
+  g_return_val_if_fail (rgb != NULL, 0);
+
+  return ROUND (gimp_rgb_intensity (rgb) * 255.0);
+}
+
+void
+gimp_rgb_composite (GimpRGB              *color1,
+                    const GimpRGB        *color2,
+                    GimpRGBCompositeMode  mode)
+{
+  g_return_if_fail (color1 != NULL);
+  g_return_if_fail (color2 != NULL);
+
+  switch (mode)
+    {
+    case GIMP_RGB_COMPOSITE_NONE:
+      break;
+
+    case GIMP_RGB_COMPOSITE_NORMAL:
+      /*  put color2 on top of color1  */
+      if (color2->a == 1.0)
+        {
+          *color1 = *color2;
+        }
+      else
+        {
+          gdouble factor = color1->a * (1.0 - color2->a);
+
+          color1->r = color1->r * factor + color2->r * color2->a;
+          color1->g = color1->g * factor + color2->g * color2->a;
+          color1->b = color1->b * factor + color2->b * color2->a;
+          color1->a = factor + color2->a;
+        }
+      break;
+
+    case GIMP_RGB_COMPOSITE_BEHIND:
+      /*  put color2 below color1  */
+      if (color1->a < 1.0)
+        {
+          gdouble factor = color2->a * (1.0 - color1->a);
+
+          color1->r = color2->r * factor + color1->r * color1->a;
+          color1->g = color2->g * factor + color1->g * color1->a;
+          color1->b = color2->b * factor + color1->b * color1->a;
+          color1->a = factor + color1->a;
+        }
+      break;
+    }
+}
+
+/*  RGBA functions  */
+
+/**
+ * gimp_rgba_set_pixel:
+ * @rgba:   a #GimpRGB struct
+ * @format: a Babl format
+ * @pixel:  pointer to the source pixel
+ *
+ * Sets the red, green, blue and alpha components of @rgba from the
+ * color stored in @pixel. The pixel format of @pixel is determined
+ * by @format.
+ *
+ * Since: 2.10
+ **/
+void
+gimp_rgba_set_pixel (GimpRGB       *rgba,
+                     const Babl    *format,
+                     gconstpointer  pixel)
+{
+  g_return_if_fail (rgba != NULL);
+  g_return_if_fail (format != NULL);
+  g_return_if_fail (pixel != NULL);
+
+  babl_process (babl_fish (format,
+                           babl_format ("R'G'B'A double")),
+                pixel, rgba, 1);
+}
+
+/**
+ * gimp_rgba_get_pixel:
+ * @rgba:   a #GimpRGB struct
+ * @format: a Babl format
+ * @pixel:  pointer to the destination pixel
+ *
+ * Writes the red, green, blue and alpha components of @rgba to the
+ * color stored in @pixel. The pixel format of @pixel is determined by
+ * @format.
+ *
+ * Since: 2.10
+ **/
+void
+gimp_rgba_get_pixel (const GimpRGB *rgba,
+                     const Babl    *format,
+                     gpointer       pixel)
+{
+  g_return_if_fail (rgba != NULL);
+  g_return_if_fail (format != NULL);
+  g_return_if_fail (pixel != NULL);
+
+  babl_process (babl_fish (babl_format ("R'G'B'A double"),
+                           format),
+                rgba, pixel, 1);
+}
+
+/**
+ * gimp_rgba_set:
+ * @rgba:  a #GimpRGB struct
+ * @red:   the red component
+ * @green: the green component
+ * @blue:  the blue component
+ * @alpha: the alpha component
+ *
+ * Sets the red, green, blue and alpha components of @rgb. The values
+ * should be between 0.0 and 1.0 but there is no check to enforce this
+ * and the values are set exactly as they are passed in.
+ **/
+void
+gimp_rgba_set (GimpRGB *rgba,
+               gdouble  r,
+               gdouble  g,
+               gdouble  b,
+               gdouble  a)
+{
+  g_return_if_fail (rgba != NULL);
+
+  rgba->r = r;
+  rgba->g = g;
+  rgba->b = b;
+  rgba->a = a;
+}
+
+/**
+ * gimp_rgba_set_uchar:
+ * @rgba:  a #GimpRGB struct
+ * @red:   the red component
+ * @green: the green component
+ * @blue:  the blue component
+ * @alpha: the alpha component
+ *
+ * Sets the red, green, blue and alpha components of @rgb from 8bit
+ * values (0 to 255).
+ **/
+void
+gimp_rgba_set_uchar (GimpRGB *rgba,
+                     guchar   r,
+                     guchar   g,
+                     guchar   b,
+                     guchar   a)
+{
+  g_return_if_fail (rgba != NULL);
+
+  rgba->r = (gdouble) r / 255.0;
+  rgba->g = (gdouble) g / 255.0;
+  rgba->b = (gdouble) b / 255.0;
+  rgba->a = (gdouble) a / 255.0;
+}
+
+void
+gimp_rgba_get_uchar (const GimpRGB *rgba,
+                     guchar        *r,
+                     guchar        *g,
+                     guchar        *b,
+                     guchar        *a)
+{
+  g_return_if_fail (rgba != NULL);
+
+  if (r) *r = ROUND (CLAMP (rgba->r, 0.0, 1.0) * 255.0);
+  if (g) *g = ROUND (CLAMP (rgba->g, 0.0, 1.0) * 255.0);
+  if (b) *b = ROUND (CLAMP (rgba->b, 0.0, 1.0) * 255.0);
+  if (a) *a = ROUND (CLAMP (rgba->a, 0.0, 1.0) * 255.0);
+}
+
+void
+gimp_rgba_add (GimpRGB       *rgba1,
+               const GimpRGB *rgba2)
+{
+  g_return_if_fail (rgba1 != NULL);
+  g_return_if_fail (rgba2 != NULL);
+
+  rgba1->r += rgba2->r;
+  rgba1->g += rgba2->g;
+  rgba1->b += rgba2->b;
+  rgba1->a += rgba2->a;
+}
+
+void
+gimp_rgba_subtract (GimpRGB       *rgba1,
+                    const GimpRGB *rgba2)
+{
+  g_return_if_fail (rgba1 != NULL);
+  g_return_if_fail (rgba2 != NULL);
+
+  rgba1->r -= rgba2->r;
+  rgba1->g -= rgba2->g;
+  rgba1->b -= rgba2->b;
+  rgba1->a -= rgba2->a;
+}
+
+void
+gimp_rgba_multiply (GimpRGB *rgba,
+                    gdouble  factor)
+{
+  g_return_if_fail (rgba != NULL);
+
+  rgba->r *= factor;
+  rgba->g *= factor;
+  rgba->b *= factor;
+  rgba->a *= factor;
+}
+
+gdouble
+gimp_rgba_distance (const GimpRGB *rgba1,
+                    const GimpRGB *rgba2)
+{
+  g_return_val_if_fail (rgba1 != NULL, 0.0);
+  g_return_val_if_fail (rgba2 != NULL, 0.0);
+
+  return (fabs (rgba1->r - rgba2->r) +
+          fabs (rgba1->g - rgba2->g) +
+          fabs (rgba1->b - rgba2->b) +
+          fabs (rgba1->a - rgba2->a));
+}
+
+
+/*
+ * GIMP_TYPE_PARAM_RGB
+ */
+
+#define GIMP_PARAM_SPEC_RGB(pspec)    (G_TYPE_CHECK_INSTANCE_CAST ((pspec), GIMP_TYPE_PARAM_RGB, GimpParamSpecRGB))
+
+typedef struct _GimpParamSpecRGB GimpParamSpecRGB;
+
+struct _GimpParamSpecRGB
+{
+  GParamSpecBoxed  parent_instance;
+
+  gboolean         has_alpha;
+  gboolean         validate; /* change this to enable [0.0...1.0] */
+  GimpRGB          default_value;
+};
+
+static void       gimp_param_rgb_class_init  (GParamSpecClass *class);
+static void       gimp_param_rgb_init        (GParamSpec      *pspec);
+static void       gimp_param_rgb_set_default (GParamSpec      *pspec,
+                                              GValue          *value);
+static gboolean   gimp_param_rgb_validate    (GParamSpec      *pspec,
+                                              GValue          *value);
+static gint       gimp_param_rgb_values_cmp  (GParamSpec      *pspec,
+                                              const GValue    *value1,
+                                              const GValue    *value2);
+
+/**
+ * gimp_param_rgb_get_type:
+ *
+ * Reveals the object type
+ *
+ * Returns: the #GType for a GimpParamRGB object
+ *
+ * Since: 2.4
+ **/
+GType
+gimp_param_rgb_get_type (void)
+{
+  static GType spec_type = 0;
+
+  if (! spec_type)
+    {
+      const GTypeInfo type_info =
+      {
+        sizeof (GParamSpecClass),
+        NULL, NULL,
+        (GClassInitFunc) gimp_param_rgb_class_init,
+        NULL, NULL,
+        sizeof (GimpParamSpecRGB),
+        0,
+        (GInstanceInitFunc) gimp_param_rgb_init
+      };
+
+      spec_type = g_type_register_static (G_TYPE_PARAM_BOXED,
+                                          "GimpParamRGB",
+                                          &type_info, 0);
+    }
+
+  return spec_type;
+}
+
+static void
+gimp_param_rgb_class_init (GParamSpecClass *class)
+{
+  class->value_type        = GIMP_TYPE_RGB;
+  class->value_set_default = gimp_param_rgb_set_default;
+  class->value_validate    = gimp_param_rgb_validate;
+  class->values_cmp        = gimp_param_rgb_values_cmp;
+}
+
+static void
+gimp_param_rgb_init (GParamSpec *pspec)
+{
+  GimpParamSpecRGB *cspec = GIMP_PARAM_SPEC_RGB (pspec);
+
+  gimp_rgba_set (&cspec->default_value, 0.0, 0.0, 0.0, 1.0);
+}
+
+static void
+gimp_param_rgb_set_default (GParamSpec *pspec,
+                            GValue     *value)
+{
+  GimpParamSpecRGB *cspec = GIMP_PARAM_SPEC_RGB (pspec);
+
+  g_value_set_static_boxed (value, &cspec->default_value);
+}
+
+static gboolean
+gimp_param_rgb_validate (GParamSpec *pspec,
+                         GValue     *value)
+{
+  GimpParamSpecRGB *rgb_spec = GIMP_PARAM_SPEC_RGB (pspec);
+  GimpRGB          *rgb      = value->data[0].v_pointer;
+
+  if (rgb_spec->validate && rgb)
+    {
+      GimpRGB oval = *rgb;
+
+      gimp_rgb_clamp (rgb);
+
+      return (oval.r != rgb->r ||
+              oval.g != rgb->g ||
+              oval.b != rgb->b ||
+              (rgb_spec->has_alpha && oval.a != rgb->a));
+    }
+
+  return FALSE;
+}
+
+static gint
+gimp_param_rgb_values_cmp (GParamSpec   *pspec,
+                           const GValue *value1,
+                           const GValue *value2)
+{
+  GimpRGB *rgb1 = value1->data[0].v_pointer;
+  GimpRGB *rgb2 = value2->data[0].v_pointer;
+
+  /*  try to return at least *something*, it's useless anyway...  */
+
+  if (! rgb1)
+    {
+      return rgb2 != NULL ? -1 : 0;
+    }
+  else if (! rgb2)
+    {
+      return rgb1 != NULL;
+    }
+  else
+    {
+      guint32 int1 = 0;
+      guint32 int2 = 0;
+
+      if (GIMP_PARAM_SPEC_RGB (pspec)->has_alpha)
+        {
+          gimp_rgba_get_uchar (rgb1,
+                               ((guchar *) &int1) + 0,
+                               ((guchar *) &int1) + 1,
+                               ((guchar *) &int1) + 2,
+                               ((guchar *) &int1) + 3);
+          gimp_rgba_get_uchar (rgb2,
+                               ((guchar *) &int2) + 0,
+                               ((guchar *) &int2) + 1,
+                               ((guchar *) &int2) + 2,
+                               ((guchar *) &int2) + 3);
+        }
+      else
+        {
+          gimp_rgb_get_uchar (rgb1,
+                              ((guchar *) &int1) + 0,
+                              ((guchar *) &int1) + 1,
+                              ((guchar *) &int1) + 2);
+          gimp_rgb_get_uchar (rgb2,
+                              ((guchar *) &int2) + 0,
+                              ((guchar *) &int2) + 1,
+                              ((guchar *) &int2) + 2);
+        }
+
+      return int1 - int2;
+    }
+}
+
+/**
+ * gimp_param_spec_rgb:
+ * @name:          Canonical name of the param
+ * @nick:          Nickname of the param
+ * @blurb:         Brief description of param.
+ * @has_alpha:     %TRUE if the alpha channel has relevance.
+ * @default_value: Value to use if none is assigned.
+ * @flags:         a combination of #GParamFlags
+ *
+ * Creates a param spec to hold an #GimpRGB value.
+ * See g_param_spec_internal() for more information.
+ *
+ * Returns: a newly allocated #GParamSpec instance
+ *
+ * Since: 2.4
+ **/
+GParamSpec *
+gimp_param_spec_rgb (const gchar   *name,
+                     const gchar   *nick,
+                     const gchar   *blurb,
+                     gboolean       has_alpha,
+                     const GimpRGB *default_value,
+                     GParamFlags    flags)
+{
+  GimpParamSpecRGB *cspec;
+
+  cspec = g_param_spec_internal (GIMP_TYPE_PARAM_RGB,
+                                 name, nick, blurb, flags);
+
+  cspec->has_alpha = has_alpha;
+
+  if (default_value)
+    cspec->default_value = *default_value;
+  else
+    gimp_rgba_set (&cspec->default_value, 0.0, 0.0, 0.0, 1.0);
+
+  return G_PARAM_SPEC (cspec);
+}
+
+/**
+ * gimp_param_spec_rgb_get_default:
+ * @pspec:         a #GimpParamSpecRGB.
+ * @default_value: return location for @pspec's default value
+ *
+ * Returns the @pspec's default color value.
+ *
+ * Since: 2.10.14
+ **/
+void
+gimp_param_spec_rgb_get_default (GParamSpec *pspec,
+                                 GimpRGB    *default_value)
+{
+  g_return_if_fail (GIMP_IS_PARAM_SPEC_RGB (pspec));
+  g_return_if_fail (default_value != NULL);
+
+  *default_value = GIMP_PARAM_SPEC_RGB (pspec)->default_value;
+}
+
+/**
+ * gimp_param_spec_rgb_has_alpha:
+ * @pspec: a #GParamSpec to hold an #GimpRGB value.
+ *
+ * Returns: %TRUE if the alpha channel is relevant.
+ *
+ * Since: 2.4
+ **/
+gboolean
+gimp_param_spec_rgb_has_alpha (GParamSpec *pspec)
+{
+  g_return_val_if_fail (GIMP_IS_PARAM_SPEC_RGB (pspec), FALSE);
+
+  return GIMP_PARAM_SPEC_RGB (pspec)->has_alpha;
+}
diff --git a/libgimpcolor/gimprgb.h b/libgimpcolor/gimprgb.h
new file mode 100644
index 0000000..089d97c
--- /dev/null
+++ b/libgimpcolor/gimprgb.h
@@ -0,0 +1,233 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_COLOR_H_INSIDE__) && !defined (GIMP_COLOR_COMPILATION)
+#error "Only <libgimpcolor/gimpcolor.h> can be included directly."
+#endif
+
+#ifndef __GIMP_RGB_H__
+#define __GIMP_RGB_H__
+
+G_BEGIN_DECLS
+
+/* For information look into the C source or the html documentation */
+
+
+/*
+ * GIMP_TYPE_RGB
+ */
+
+#define GIMP_TYPE_RGB               (gimp_rgb_get_type ())
+#define GIMP_VALUE_HOLDS_RGB(value) (G_TYPE_CHECK_VALUE_TYPE ((value), GIMP_TYPE_RGB))
+
+GType   gimp_rgb_get_type           (void) G_GNUC_CONST;
+
+void    gimp_value_get_rgb          (const GValue  *value,
+                                     GimpRGB       *rgb);
+void    gimp_value_set_rgb          (GValue        *value,
+                                     const GimpRGB *rgb);
+
+
+/*
+ * GIMP_TYPE_PARAM_RGB
+ */
+
+#define GIMP_TYPE_PARAM_RGB           (gimp_param_rgb_get_type ())
+#define GIMP_IS_PARAM_SPEC_RGB(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), GIMP_TYPE_PARAM_RGB))
+
+
+GType        gimp_param_rgb_get_type         (void) G_GNUC_CONST;
+
+GParamSpec * gimp_param_spec_rgb             (const gchar    *name,
+                                              const gchar    *nick,
+                                              const gchar    *blurb,
+                                              gboolean        has_alpha,
+                                              const GimpRGB  *default_value,
+                                              GParamFlags     flags);
+
+void         gimp_param_spec_rgb_get_default (GParamSpec     *pspec,
+                                              GimpRGB        *default_value);
+gboolean     gimp_param_spec_rgb_has_alpha   (GParamSpec     *pspec);
+
+
+/*  RGB and RGBA color types and operations taken from LibGCK  */
+
+/**
+ * GimpRGBCompositeMode:
+ * @GIMP_RGB_COMPOSITE_NONE: don't do compositing
+ * @GIMP_RGB_COMPOSITE_NORMAL: composite on top
+ * @GIMP_RGB_COMPOSITE_BEHIND: composite behind
+ **/
+typedef enum
+{
+  GIMP_RGB_COMPOSITE_NONE = 0,
+  GIMP_RGB_COMPOSITE_NORMAL,
+  GIMP_RGB_COMPOSITE_BEHIND
+} GimpRGBCompositeMode;
+
+
+void      gimp_rgb_set             (GimpRGB       *rgb,
+                                    gdouble        red,
+                                    gdouble        green,
+                                    gdouble        blue);
+void      gimp_rgb_set_alpha       (GimpRGB       *rgb,
+                                    gdouble        alpha);
+
+void      gimp_rgb_set_pixel       (GimpRGB       *rgb,
+                                    const Babl    *format,
+                                    gconstpointer  pixel);
+void      gimp_rgb_get_pixel       (const GimpRGB *rgb,
+                                    const Babl    *format,
+                                    gpointer       pixel);
+
+void      gimp_rgb_set_uchar       (GimpRGB       *rgb,
+                                    guchar         red,
+                                    guchar         green,
+                                    guchar         blue);
+void      gimp_rgb_get_uchar       (const GimpRGB *rgb,
+                                    guchar        *red,
+                                    guchar        *green,
+                                    guchar        *blue);
+
+gboolean  gimp_rgb_parse_name      (GimpRGB       *rgb,
+                                    const gchar   *name,
+                                    gint           len);
+gboolean  gimp_rgb_parse_hex       (GimpRGB       *rgb,
+                                    const gchar   *hex,
+                                    gint           len);
+gboolean  gimp_rgb_parse_css       (GimpRGB       *rgb,
+                                    const gchar   *css,
+                                    gint           len);
+
+void      gimp_rgb_add             (GimpRGB       *rgb1,
+                                    const GimpRGB *rgb2);
+void      gimp_rgb_subtract        (GimpRGB       *rgb1,
+                                    const GimpRGB *rgb2);
+void      gimp_rgb_multiply        (GimpRGB       *rgb1,
+                                    gdouble        factor);
+gdouble   gimp_rgb_distance        (const GimpRGB *rgb1,
+                                    const GimpRGB *rgb2);
+
+gdouble   gimp_rgb_max             (const GimpRGB *rgb);
+gdouble   gimp_rgb_min             (const GimpRGB *rgb);
+void      gimp_rgb_clamp           (GimpRGB       *rgb);
+
+void      gimp_rgb_gamma           (GimpRGB       *rgb,
+                                    gdouble        gamma);
+
+gdouble   gimp_rgb_luminance       (const GimpRGB *rgb);
+guchar    gimp_rgb_luminance_uchar (const GimpRGB *rgb);
+
+GIMP_DEPRECATED_FOR(gimp_rgb_luminance)
+gdouble   gimp_rgb_intensity       (const GimpRGB *rgb);
+GIMP_DEPRECATED_FOR(gimp_rgb_luminance_uchar)
+guchar    gimp_rgb_intensity_uchar (const GimpRGB *rgb);
+
+void      gimp_rgb_composite       (GimpRGB              *color1,
+                                    const GimpRGB        *color2,
+                                    GimpRGBCompositeMode  mode);
+
+/*  access to the list of color names  */
+gint      gimp_rgb_list_names      (const gchar ***names,
+                                    GimpRGB      **colors);
+
+
+void      gimp_rgba_set            (GimpRGB       *rgba,
+                                    gdouble        red,
+                                    gdouble        green,
+                                    gdouble        blue,
+                                    gdouble        alpha);
+
+void      gimp_rgba_set_pixel      (GimpRGB       *rgba,
+                                    const Babl    *format,
+                                    gconstpointer  pixel);
+void      gimp_rgba_get_pixel      (const GimpRGB *rgba,
+                                    const Babl    *format,
+                                    gpointer       pixel);
+
+void      gimp_rgba_set_uchar      (GimpRGB       *rgba,
+                                    guchar         red,
+                                    guchar         green,
+                                    guchar         blue,
+                                    guchar         alpha);
+void      gimp_rgba_get_uchar      (const GimpRGB *rgba,
+                                    guchar        *red,
+                                    guchar        *green,
+                                    guchar        *blue,
+                                    guchar        *alpha);
+
+gboolean  gimp_rgba_parse_css      (GimpRGB       *rgba,
+                                    const gchar   *css,
+                                    gint           len);
+
+void      gimp_rgba_add            (GimpRGB       *rgba1,
+                                    const GimpRGB *rgba2);
+void      gimp_rgba_subtract       (GimpRGB       *rgba1,
+                                    const GimpRGB *rgba2);
+void      gimp_rgba_multiply       (GimpRGB       *rgba,
+                                    gdouble        factor);
+
+gdouble   gimp_rgba_distance       (const GimpRGB *rgba1,
+                                    const GimpRGB *rgba2);
+
+
+
+/*  Map D50-adapted sRGB to luminance  */
+
+/*
+ * The weights to compute true CIE luminance from linear red, green
+ * and blue as defined by the sRGB color space specs in an ICC profile
+ * color managed application. The weights below have been chromatically
+ * adapted from D65 (as specified by the sRGB color space specs)
+ * to D50 (as specified by D50 illuminant values in the ICC V4 specs).
+ */
+
+#define GIMP_RGB_LUMINANCE_RED    (0.22248840)
+#define GIMP_RGB_LUMINANCE_GREEN  (0.71690369)
+#define GIMP_RGB_LUMINANCE_BLUE   (0.06060791)
+
+#define GIMP_RGB_LUMINANCE(r,g,b) ((r) * GIMP_RGB_LUMINANCE_RED   + \
+                                   (g) * GIMP_RGB_LUMINANCE_GREEN + \
+                                   (b) * GIMP_RGB_LUMINANCE_BLUE)
+
+
+#ifndef GIMP_DISABLE_DEPRECATED
+
+/*
+ * The coefficients below properly computed luminance for monitors
+ * having phosphors that were contemporary at the introduction of NTSC
+ * television in 1953. They are still appropriate for computing video
+ * luma. However, these coefficients do not accurately compute
+ * luminance for contemporary monitors. The use of these definitions
+ * is deprecated.
+ */
+
+#define GIMP_RGB_INTENSITY_RED    (0.30)
+#define GIMP_RGB_INTENSITY_GREEN  (0.59)
+#define GIMP_RGB_INTENSITY_BLUE   (0.11)
+
+#define GIMP_RGB_INTENSITY(r,g,b) ((r) * GIMP_RGB_INTENSITY_RED   + \
+                                   (g) * GIMP_RGB_INTENSITY_GREEN + \
+                                   (b) * GIMP_RGB_INTENSITY_BLUE)
+
+#endif
+
+
+G_END_DECLS
+
+#endif  /* __GIMP_RGB_H__ */
diff --git a/libgimpcolor/test-color-parser.c b/libgimpcolor/test-color-parser.c
new file mode 100644
index 0000000..4ce7c50
--- /dev/null
+++ b/libgimpcolor/test-color-parser.c
@@ -0,0 +1,119 @@
+/* unit tests for the color parsing routines in gimprgb-parse.c
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+
+#include <babl/babl.h>
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include <glib-object.h>
+#include <cairo.h>
+
+#include "gimpcolor.h"
+
+
+#define DBL(c) ((gdouble)(c) / 255.0)
+
+
+typedef struct
+{
+  const gchar   *str;
+  gboolean       alpha;
+  gboolean       fail;
+  const gdouble  r;
+  const gdouble  g;
+  const gdouble  b;
+  const gdouble  a;
+} ColorSample;
+
+static const ColorSample samples[] =
+{
+  /* sample                  alpha  fail   red       green     blue     alpha */
+
+  { "#000000",               FALSE, FALSE, 0.0,      0.0,      0.0,      0.0 },
+  { "#FFff00",               FALSE, FALSE, 1.0,      1.0,      0.0,      0.0 },
+  { "#6495ed",               FALSE, FALSE, DBL(100), DBL(149), DBL(237), 0.0 },
+  { "#fff",                  FALSE, FALSE, 1.0,      1.0,      1.0,      0.0 },
+  { "#64649595eded",         FALSE, FALSE, 1.0,      1.0,      0.0,      0.0 },
+  { "rgb(0,0,0)",            FALSE, FALSE, 0.0,      0.0,      0.0,      0.0 },
+  { "rgb(100,149,237)",      FALSE, FALSE, DBL(100), DBL(149), DBL(237), 0.0 },
+  { "rgba(100%,0,100%,0.5)", TRUE,  FALSE, 255.0,    0.0,      255.0,    0.5 },
+  { "rgba(100%,0,100%,0.5)", FALSE, TRUE,  255.0,    0.0,      255.0,    0.5 },
+  { "rgb(100%,149,20%)",     FALSE, FALSE, 1.0,      DBL(149), 0.2,      0.0 },
+  { "rgb(100%,149,20%)",     TRUE,  TRUE,  1.0,      DBL(149), 0.2,      0.0 },
+  { "rgb(foobar)",           FALSE, TRUE,  0.0,      0.0,      0.0,      0.0 },
+  { "rgb(100,149,237",       FALSE, TRUE,  0.0,      0.0,      0.0,      0.0 },
+  { "rED",                   FALSE, FALSE, 1.0,      0.0,      0.0,      0.0 },
+  { "cornflowerblue",        FALSE, FALSE, DBL(100), DBL(149), DBL(237), 0.0 },
+  { "    red",               FALSE, FALSE, 1.0,      0.0,      0.0,      0.0 },
+  { "red      ",             FALSE, FALSE, 1.0,      0.0,      0.0,      0.0 },
+  { "red",                   TRUE,  TRUE,  1.0,      0.0,      0.0,      0.0 },
+  { "red  blue",             FALSE, TRUE,  0.0,      0.0,      0.0,      0.0 },
+  { "transparent",           FALSE, TRUE,  0.0,      0.0,      0.0,      0.0 },
+  { "transparent",           TRUE,  FALSE, 0.0,      0.0,      0.0,      0.0 },
+  { "23foobar",              FALSE, TRUE,  0.0,      0.0,      0.0,      0.0 },
+  { "",                      FALSE, TRUE,  0.0,      0.0,      0.0,      0.0 }
+};
+
+
+static gint
+check_failure (const ColorSample *sample,
+               gboolean           success,
+               GimpRGB           *rgb)
+{
+  if (success && sample->fail)
+    {
+      g_print ("Parser succeeded for sample \"%s\" but should have failed!\n"
+               "  parsed color: (%g, %g, %g, %g)\n",
+               sample->str, rgb->r, rgb->g, rgb->b, rgb->a);
+      return 1;
+    }
+
+  if (!success && !sample->fail)
+    {
+      g_print ("Parser failed for sample \"%s\" but should have succeeded!\n"
+               "  parsed color: (%g, %g, %g, %g)\n",
+               sample->str, rgb->r, rgb->g, rgb->b, rgb->a);
+      return 1;
+    }
+
+  return 0;
+}
+
+int
+main (void)
+{
+  gint failures = 0;
+  gint i;
+
+  g_print ("\nTesting the GIMP color parser ...\n");
+
+  for (i = 0; i < G_N_ELEMENTS (samples); i++)
+    {
+      GimpRGB   rgb = { 0.0, 0.0, 0.0, 0.0 };
+      gboolean  success;
+
+      if (samples[i].alpha)
+        success = gimp_rgba_parse_css (&rgb, samples[i].str, -1);
+      else
+        success = gimp_rgb_parse_css (&rgb, samples[i].str, -1);
+
+      failures += check_failure (samples + i, success, &rgb);
+    }
+
+  if (failures)
+    {
+      g_print ("%d out of %d samples failed!\n\n",
+               failures, (int)G_N_ELEMENTS (samples));
+      return EXIT_FAILURE;
+    }
+  else
+    {
+      g_print ("All %d samples passed.\n\n", (int)G_N_ELEMENTS (samples));
+      return EXIT_SUCCESS;
+    }
+}
+