Adding upstream version 2.10.36.upstream/2.10.36

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

38 files changed, 4410 insertions, 0 deletions

diff --git a/app/operations/layer-modes-legacy/Makefile.am b/app/operations/layer-modes-legacy/Makefile.am
new file mode 100644
index 0000000..b8241da
--- /dev/null
+++ b/app/operations/layer-modes-legacy/Makefile.am
@@ -0,0 +1,54 @@
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+	gimpoperationburnlegacy.c		\
+	gimpoperationburnlegacy.h		\
+	gimpoperationdarkenonlylegacy.c		\
+	gimpoperationdarkenonlylegacy.h		\
+	gimpoperationdifferencelegacy.c		\
+	gimpoperationdifferencelegacy.h		\
+	gimpoperationdividelegacy.c		\
+	gimpoperationdividelegacy.h		\
+	gimpoperationdodgelegacy.c		\
+	gimpoperationdodgelegacy.h		\
+	gimpoperationgrainextractlegacy.c	\
+	gimpoperationgrainextractlegacy.h	\
+	gimpoperationgrainmergelegacy.c		\
+	gimpoperationgrainmergelegacy.h		\
+	gimpoperationhardlightlegacy.c		\
+	gimpoperationhardlightlegacy.h		\
+	gimpoperationhslcolorlegacy.c		\
+	gimpoperationhslcolorlegacy.h		\
+	gimpoperationhsvhuelegacy.c		\
+	gimpoperationhsvhuelegacy.h		\
+	gimpoperationhsvsaturationlegacy.c	\
+	gimpoperationhsvsaturationlegacy.h	\
+	gimpoperationhsvvaluelegacy.c		\
+	gimpoperationhsvvaluelegacy.h		\
+	gimpoperationlightenonlylegacy.c	\
+	gimpoperationlightenonlylegacy.h	\
+	gimpoperationmultiplylegacy.c		\
+	gimpoperationmultiplylegacy.h		\
+	gimpoperationscreenlegacy.c		\
+	gimpoperationscreenlegacy.h		\
+	gimpoperationsoftlightlegacy.c		\
+	gimpoperationsoftlightlegacy.h		\
+	gimpoperationsubtractlegacy.c		\
+	gimpoperationsubtractlegacy.h
+
diff --git a/app/operations/layer-modes-legacy/Makefile.in b/app/operations/layer-modes-legacy/Makefile.in
new file mode 100644
index 0000000..f51eeed
--- /dev/null
+++ b/app/operations/layer-modes-legacy/Makefile.in
@@ -0,0 +1,1038 @@
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+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LIBRARIES)
+installdirs:
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-noinstLIBRARIES \
+	mostlyclean-am
+
+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/gimpoperationadditionlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationburnlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationdarkenonlylegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationdifferencelegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationdividelegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationdodgelegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationgrainextractlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationgrainmergelegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationhardlightlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationhslcolorlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationhsvhuelegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationhsvsaturationlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationhsvvaluelegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationlightenonlylegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationmultiplylegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationscreenlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationsoftlightlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationsubtractlegacy.Po
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+		-rm -f ./$(DEPDIR)/gimpoperationadditionlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationburnlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationdarkenonlylegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationdifferencelegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationdividelegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationdodgelegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationgrainextractlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationgrainmergelegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationhardlightlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationhslcolorlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationhsvhuelegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationhsvsaturationlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationhsvvaluelegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationlightenonlylegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationmultiplylegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationscreenlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationsoftlightlegacy.Po
+	-rm -f ./$(DEPDIR)/gimpoperationsubtractlegacy.Po
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am:
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-generic clean-libtool clean-noinstLIBRARIES \
+	cscopelist-am ctags ctags-am distclean distclean-compile \
+	distclean-generic distclean-libtool distclean-tags distdir dvi \
+	dvi-am html html-am info info-am install install-am \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-man install-pdf \
+	install-pdf-am install-ps install-ps-am install-strip \
+	installcheck installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags tags-am uninstall uninstall-am
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/app/operations/layer-modes-legacy/gimpoperationadditionlegacy.c b/app/operations/layer-modes-legacy/gimpoperationadditionlegacy.c
new file mode 100644
index 0000000..02992f2
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationadditionlegacy.c
@@ -0,0 +1,126 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationadditionmode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationadditionlegacy.h"
+
+
+static gboolean   gimp_operation_addition_legacy_process (GeglOperation       *op,
+                                                          void                *in,
+                                                          void                *layer,
+                                                          void                *mask,
+                                                          void                *out,
+                                                          glong                samples,
+                                                          const GeglRectangle *roi,
+                                                          gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationAdditionLegacy, gimp_operation_addition_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_addition_legacy_class_init (GimpOperationAdditionLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:addition-legacy",
+                                 "description", "GIMP addition mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_addition_legacy_process;
+}
+
+static void
+gimp_operation_addition_legacy_init (GimpOperationAdditionLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_addition_legacy_process (GeglOperation       *op,
+                                        void                *in_p,
+                                        void                *layer_p,
+                                        void                *mask_p,
+                                        void                *out_p,
+                                        glong                samples,
+                                        const GeglRectangle *roi,
+                                        gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+  const gboolean          has_mask   = mask != NULL;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (has_mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gfloat ratio = comp_alpha / new_alpha;
+          gint   b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = in[b] + layer[b];
+              comp = CLAMP (comp, 0.0f, 1.0f);
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (has_mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationadditionlegacy.h b/app/operations/layer-modes-legacy/gimpoperationadditionlegacy.h
new file mode 100644
index 0000000..7f9df60
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationadditionlegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationadditionlegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_ADDITION_LEGACY_H__
+#define __GIMP_OPERATION_ADDITION_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_ADDITION_LEGACY            (gimp_operation_addition_legacy_get_type ())
+#define GIMP_OPERATION_ADDITION_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_ADDITION_LEGACY, GimpOperationAdditionLegacy))
+#define GIMP_OPERATION_ADDITION_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_ADDITION_LEGACY, GimpOperationAdditionLegacyClass))
+#define GIMP_IS_OPERATION_ADDITION_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_ADDITION_LEGACY))
+#define GIMP_IS_OPERATION_ADDITION_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_ADDITION_LEGACY))
+#define GIMP_OPERATION_ADDITION_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_ADDITION_LEGACY, GimpOperationAdditionLegacyClass))
+
+
+typedef struct _GimpOperationAdditionLegacy      GimpOperationAdditionLegacy;
+typedef struct _GimpOperationAdditionLegacyClass GimpOperationAdditionLegacyClass;
+
+struct _GimpOperationAdditionLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationAdditionLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_addition_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_ADDITION_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationburnlegacy.c b/app/operations/layer-modes-legacy/gimpoperationburnlegacy.c
new file mode 100644
index 0000000..5511b69
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationburnlegacy.c
@@ -0,0 +1,128 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationburnmode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationburnlegacy.h"
+
+
+static gboolean   gimp_operation_burn_legacy_process (GeglOperation       *op,
+                                                      void                *in,
+                                                      void                *layer,
+                                                      void                *mask,
+                                                      void                *out,
+                                                      glong                samples,
+                                                      const GeglRectangle *roi,
+                                                      gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationBurnLegacy, gimp_operation_burn_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_burn_legacy_class_init (GimpOperationBurnLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:burn-legacy",
+                                 "description", "GIMP burn mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_burn_legacy_process;
+}
+
+static void
+gimp_operation_burn_legacy_init (GimpOperationBurnLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_burn_legacy_process (GeglOperation       *op,
+                                    void                *in_p,
+                                    void                *layer_p,
+                                    void                *mask_p,
+                                    void                *out_p,
+                                    glong                samples,
+                                    const GeglRectangle *roi,
+                                    gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gfloat ratio = comp_alpha / new_alpha;
+          gint   b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = 1.0f - (1.0f - in[b]) / layer[b];
+              /* The CLAMP macro is deliberately inlined and
+               * written to map comp == NAN (0 / 0) -> 1
+               */
+              comp = comp < 0.0f ? 0.0f : comp < 1.0f ? comp : 1.0f;
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationburnlegacy.h b/app/operations/layer-modes-legacy/gimpoperationburnlegacy.h
new file mode 100644
index 0000000..dc13e3f
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationburnlegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationburnlegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_BURN_LEGACY_H__
+#define __GIMP_OPERATION_BURN_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_BURN_LEGACY            (gimp_operation_burn_legacy_get_type ())
+#define GIMP_OPERATION_BURN_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_BURN_LEGACY, GimpOperationBurnLegacy))
+#define GIMP_OPERATION_BURN_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_BURN_LEGACY, GimpOperationBurnLegacyClass))
+#define GIMP_IS_OPERATION_BURN_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_BURN_LEGACY))
+#define GIMP_IS_OPERATION_BURN_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_BURN_LEGACY))
+#define GIMP_OPERATION_BURN_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_BURN_LEGACY, GimpOperationBurnLegacyClass))
+
+
+typedef struct _GimpOperationBurnLegacy      GimpOperationBurnLegacy;
+typedef struct _GimpOperationBurnLegacyClass GimpOperationBurnLegacyClass;
+
+struct _GimpOperationBurnLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationBurnLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_burn_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_BURN_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationdarkenonlylegacy.c b/app/operations/layer-modes-legacy/gimpoperationdarkenonlylegacy.c
new file mode 100644
index 0000000..1a3ebdf
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationdarkenonlylegacy.c
@@ -0,0 +1,124 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationdarkenonlymode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationdarkenonlylegacy.h"
+
+
+static gboolean   gimp_operation_darken_only_legacy_process (GeglOperation       *op,
+                                                             void                *in,
+                                                             void                *layer,
+                                                             void                *mask,
+                                                             void                *out,
+                                                             glong                samples,
+                                                             const GeglRectangle *roi,
+                                                             gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationDarkenOnlyLegacy, gimp_operation_darken_only_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_darken_only_legacy_class_init (GimpOperationDarkenOnlyLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:darken-only-legacy",
+                                 "description", "GIMP darken only mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_darken_only_legacy_process;
+}
+
+static void
+gimp_operation_darken_only_legacy_init (GimpOperationDarkenOnlyLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_darken_only_legacy_process (GeglOperation       *op,
+                                           void                *in_p,
+                                           void                *layer_p,
+                                           void                *mask_p,
+                                           void                *out_p,
+                                           glong                samples,
+                                           const GeglRectangle *roi,
+                                           gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (new_alpha && comp_alpha)
+        {
+          gint   b;
+          gfloat ratio = comp_alpha / new_alpha;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = MIN (in[b], layer[b]);
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationdarkenonlylegacy.h b/app/operations/layer-modes-legacy/gimpoperationdarkenonlylegacy.h
new file mode 100644
index 0000000..c0406a1
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationdarkenonlylegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationdarkenonlylegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_DARKEN_ONLY_LEGACY_H__
+#define __GIMP_OPERATION_DARKEN_ONLY_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_DARKEN_ONLY_LEGACY            (gimp_operation_darken_only_legacy_get_type ())
+#define GIMP_OPERATION_DARKEN_ONLY_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_DARKEN_ONLY_MODE, GimpOperationDarkenOnlyLegacy))
+#define GIMP_OPERATION_DARKEN_ONLY_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_DARKEN_ONLY_MODE, GimpOperationDarkenOnlyLegacyClass))
+#define GIMP_IS_OPERATION_DARKEN_ONLY_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_DARKEN_ONLY_MODE))
+#define GIMP_IS_OPERATION_DARKEN_ONLY_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_DARKEN_ONLY_MODE))
+#define GIMP_OPERATION_DARKEN_ONLY_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_DARKEN_ONLY_MODE, GimpOperationDarkenOnlyLegacyClass))
+
+
+typedef struct _GimpOperationDarkenOnlyLegacy      GimpOperationDarkenOnlyLegacy;
+typedef struct _GimpOperationDarkenOnlyLegacyClass GimpOperationDarkenOnlyLegacyClass;
+
+struct _GimpOperationDarkenOnlyLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationDarkenOnlyLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_darken_only_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_DARKEN_ONLY_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationdifferencelegacy.c b/app/operations/layer-modes-legacy/gimpoperationdifferencelegacy.c
new file mode 100644
index 0000000..55f3328
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationdifferencelegacy.c
@@ -0,0 +1,126 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationdifferencemode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationdifferencelegacy.h"
+
+
+static gboolean   gimp_operation_difference_legacy_process (GeglOperation       *op,
+                                                            void                *in,
+                                                            void                *layer,
+                                                            void                *mask,
+                                                            void                *out,
+                                                            glong                samples,
+                                                            const GeglRectangle *roi,
+                                                            gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationDifferenceLegacy, gimp_operation_difference_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_difference_legacy_class_init (GimpOperationDifferenceLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:difference-legacy",
+                                 "description", "GIMP difference mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_difference_legacy_process;
+}
+
+static void
+gimp_operation_difference_legacy_init (GimpOperationDifferenceLegacy *self)
+{
+}
+
+
+static gboolean
+gimp_operation_difference_legacy_process (GeglOperation       *op,
+                                          void                *in_p,
+                                          void                *layer_p,
+                                          void                *mask_p,
+                                          void                *out_p,
+                                          glong                samples,
+                                          const GeglRectangle *roi,
+                                          gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gfloat ratio = comp_alpha / new_alpha;
+          gint   b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = in[b] - layer[b];
+              comp = (comp < 0.0f) ? -comp : comp;
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationdifferencelegacy.h b/app/operations/layer-modes-legacy/gimpoperationdifferencelegacy.h
new file mode 100644
index 0000000..145b9c2
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationdifferencelegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationdifferencelegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_DIFFERENCE_LEGACY_H__
+#define __GIMP_OPERATION_DIFFERENCE_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_DIFFERENCE_LEGACY            (gimp_operation_difference_legacy_get_type ())
+#define GIMP_OPERATION_DIFFERENCE_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_DIFFERENCE_LEGACY, GimpOperationDifferenceLegacy))
+#define GIMP_OPERATION_DIFFERENCE_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_DIFFERENCE_LEGACY, GimpOperationDifferenceLegacyClass))
+#define GIMP_IS_OPERATION_DIFFERENCE_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_DIFFERENCE_LEGACY))
+#define GIMP_IS_OPERATION_DIFFERENCE_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_DIFFERENCE_LEGACY))
+#define GIMP_OPERATION_DIFFERENCE_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_DIFFERENCE_LEGACY, GimpOperationDifferenceLegacyClass))
+
+
+typedef struct _GimpOperationDifferenceLegacy      GimpOperationDifferenceLegacy;
+typedef struct _GimpOperationDifferenceLegacyClass GimpOperationDifferenceLegacyClass;
+
+struct _GimpOperationDifferenceLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationDifferenceLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_difference_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_DIFFERENCE_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationdividelegacy.c b/app/operations/layer-modes-legacy/gimpoperationdividelegacy.c
new file mode 100644
index 0000000..8fe8dd8
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationdividelegacy.c
@@ -0,0 +1,127 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationdividemode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "libgimpmath/gimpmath.h"
+
+#include "../operations-types.h"
+
+#include "gimpoperationdividelegacy.h"
+
+
+static gboolean   gimp_operation_divide_legacy_process (GeglOperation       *op,
+                                                        void                *in,
+                                                        void                *layer,
+                                                        void                *mask,
+                                                        void                *out,
+                                                        glong                samples,
+                                                        const GeglRectangle *roi,
+                                                        gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationDivideLegacy, gimp_operation_divide_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_divide_legacy_class_init (GimpOperationDivideLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:divide-legacy",
+                                 "description", "GIMP divide mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_divide_legacy_process;
+}
+
+static void
+gimp_operation_divide_legacy_init (GimpOperationDivideLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_divide_legacy_process (GeglOperation       *op,
+                                      void                *in_p,
+                                      void                *layer_p,
+                                      void                *mask_p,
+                                      void                *out_p,
+                                      glong                samples,
+                                      const GeglRectangle *roi,
+                                      gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gint   b;
+          gfloat ratio = comp_alpha / new_alpha;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = in[b] / layer[b];
+              comp = SAFE_CLAMP (comp, 0.0f, 1.0f);
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationdividelegacy.h b/app/operations/layer-modes-legacy/gimpoperationdividelegacy.h
new file mode 100644
index 0000000..fa5de12
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationdividelegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationdividelegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_DIVIDE_LEGACY_H__
+#define __GIMP_OPERATION_DIVIDE_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_DIVIDE_LEGACY            (gimp_operation_divide_legacy_get_type ())
+#define GIMP_OPERATION_DIVIDE_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_DIVIDE_LEGACY, GimpOperationDivideLegacy))
+#define GIMP_OPERATION_DIVIDE_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_DIVIDE_LEGACY, GimpOperationDivideLegacyClass))
+#define GIMP_IS_OPERATION_DIVIDE_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_DIVIDE_LEGACY))
+#define GIMP_IS_OPERATION_DIVIDE_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_DIVIDE_LEGACY))
+#define GIMP_OPERATION_DIVIDE_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_DIVIDE_LEGACY, GimpOperationDivideLegacyClass))
+
+
+typedef struct _GimpOperationDivideLegacy      GimpOperationDivideLegacy;
+typedef struct _GimpOperationDivideLegacyClass GimpOperationDivideLegacyClass;
+
+struct _GimpOperationDivideLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationDivideLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_divide_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_DIVIDE_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationdodgelegacy.c b/app/operations/layer-modes-legacy/gimpoperationdodgelegacy.c
new file mode 100644
index 0000000..65adaef
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationdodgelegacy.c
@@ -0,0 +1,127 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationdodgelegacy.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "libgimpmath/gimpmath.h"
+
+#include "../operations-types.h"
+
+#include "gimpoperationdodgelegacy.h"
+
+
+static gboolean   gimp_operation_dodge_legacy_process (GeglOperation       *op,
+                                                       void                *in,
+                                                       void                *layer,
+                                                       void                *mask,
+                                                       void                *out,
+                                                       glong                samples,
+                                                       const GeglRectangle *roi,
+                                                       gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationDodgeLegacy, gimp_operation_dodge_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_dodge_legacy_class_init (GimpOperationDodgeLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:dodge-legacy",
+                                 "description", "GIMP dodge mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_dodge_legacy_process;
+}
+
+static void
+gimp_operation_dodge_legacy_init (GimpOperationDodgeLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_dodge_legacy_process (GeglOperation       *op,
+                                     void                *in_p,
+                                     void                *layer_p,
+                                     void                *mask_p,
+                                     void                *out_p,
+                                     glong                samples,
+                                     const GeglRectangle *roi,
+                                     gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gint   b;
+          gfloat ratio = comp_alpha / new_alpha;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = in[b] / (1.0f - layer[b]);
+              comp = SAFE_CLAMP (comp, 0.0f, 1.0f);
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationdodgelegacy.h b/app/operations/layer-modes-legacy/gimpoperationdodgelegacy.h
new file mode 100644
index 0000000..b640fed
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationdodgelegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationdodgelegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_DODGE_LEGACY_H__
+#define __GIMP_OPERATION_DODGE_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_DODGE_LEGACY            (gimp_operation_dodge_legacy_get_type ())
+#define GIMP_OPERATION_DODGE_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_DODGE_LEGACY, GimpOperationDodgeLegacy))
+#define GIMP_OPERATION_DODGE_LEGACY_CLASS(klass)  (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_DODGE_LEGACY, GimpOperationDodgeLegacyClass))
+#define GIMP_IS_OPERATION_DODGE_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_DODGE_LEGACY))
+#define GIMP_IS_OPERATION_DODGE_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_DODGE_LEGACY))
+#define GIMP_OPERATION_DODGE_LEGACY_GET_CLASS(obj)(G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_DODGE_LEGACY, GimpOperationDodgeLegacyClass))
+
+
+typedef struct _GimpOperationDodgeLegacy      GimpOperationDodgeLegacy;
+typedef struct _GimpOperationDodgeLegacyClass GimpOperationDodgeLegacyClass;
+
+struct _GimpOperationDodgeLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationDodgeLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_dodge_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_DODGE_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationgrainextractlegacy.c b/app/operations/layer-modes-legacy/gimpoperationgrainextractlegacy.c
new file mode 100644
index 0000000..77338c4
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationgrainextractlegacy.c
@@ -0,0 +1,125 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationgrainextractmode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationgrainextractlegacy.h"
+
+
+static gboolean   gimp_operation_grain_extract_legacy_process (GeglOperation       *op,
+                                                               void                *in,
+                                                               void                *layer,
+                                                               void                *mask,
+                                                               void                *out,
+                                                               glong                samples,
+                                                               const GeglRectangle *roi,
+                                                               gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationGrainExtractLegacy, gimp_operation_grain_extract_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_grain_extract_legacy_class_init (GimpOperationGrainExtractLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:grain-extract-legacy",
+                                 "description", "GIMP grain extract mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_grain_extract_legacy_process;
+}
+
+static void
+gimp_operation_grain_extract_legacy_init (GimpOperationGrainExtractLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_grain_extract_legacy_process (GeglOperation       *op,
+                                             void                *in_p,
+                                             void                *layer_p,
+                                             void                *mask_p,
+                                             void                *out_p,
+                                             glong                samples,
+                                             const GeglRectangle *roi,
+                                             gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gfloat ratio = comp_alpha / new_alpha;
+          gint   b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = in[b] - layer[b] + 128.0f / 255.0f;
+              comp = CLAMP (comp, 0.0f, 1.0f);
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationgrainextractlegacy.h b/app/operations/layer-modes-legacy/gimpoperationgrainextractlegacy.h
new file mode 100644
index 0000000..149ee09
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationgrainextractlegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationgrainextractlegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_GRAIN_EXTRACT_LEGACY_H__
+#define __GIMP_OPERATION_GRAIN_EXTRACT_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_GRAIN_EXTRACT_LEGACY            (gimp_operation_grain_extract_legacy_get_type ())
+#define GIMP_OPERATION_GRAIN_EXTRACT_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_GRAIN_EXTRACT_LEGACY, GimpOperationGrainExtractLegacy))
+#define GIMP_OPERATION_GRAIN_EXTRACT_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_GRAIN_EXTRACT_LEGACY, GimpOperationGrainExtractLegacyClass))
+#define GIMP_IS_OPERATION_GRAIN_EXTRACT_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_GRAIN_EXTRACT_LEGACY))
+#define GIMP_IS_OPERATION_GRAIN_EXTRACT_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_GRAIN_EXTRACT_LEGACY))
+#define GIMP_OPERATION_GRAIN_EXTRACT_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_GRAIN_EXTRACT_LEGACY, GimpOperationGrainExtractLegacyClass))
+
+
+typedef struct _GimpOperationGrainExtractLegacy      GimpOperationGrainExtractLegacy;
+typedef struct _GimpOperationGrainExtractLegacyClass GimpOperationGrainExtractLegacyClass;
+
+struct _GimpOperationGrainExtractLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationGrainExtractLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_grain_extract_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_GRAIN_EXTRACT_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationgrainmergelegacy.c b/app/operations/layer-modes-legacy/gimpoperationgrainmergelegacy.c
new file mode 100644
index 0000000..c12a995
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationgrainmergelegacy.c
@@ -0,0 +1,125 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationgrainmergemode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationgrainmergelegacy.h"
+
+
+static gboolean   gimp_operation_grain_merge_legacy_process (GeglOperation       *op,
+                                                             void                *in,
+                                                             void                *layer,
+                                                             void                *mask,
+                                                             void                *out,
+                                                             glong                samples,
+                                                             const GeglRectangle *roi,
+                                                             gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationGrainMergeLegacy, gimp_operation_grain_merge_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_grain_merge_legacy_class_init (GimpOperationGrainMergeLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:grain-merge-legacy",
+                                 "description", "GIMP grain merge mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_grain_merge_legacy_process;
+}
+
+static void
+gimp_operation_grain_merge_legacy_init (GimpOperationGrainMergeLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_grain_merge_legacy_process (GeglOperation       *op,
+                                           void                *in_p,
+                                           void                *layer_p,
+                                           void                *mask_p,
+                                           void                *out_p,
+                                           glong                samples,
+                                           const GeglRectangle *roi,
+                                           gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gfloat ratio = comp_alpha / new_alpha;
+          gint   b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = in[b] + layer[b] - 128.0f / 255.0f;
+              comp = CLAMP (comp, 0.0f, 1.0f);
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask ++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationgrainmergelegacy.h b/app/operations/layer-modes-legacy/gimpoperationgrainmergelegacy.h
new file mode 100644
index 0000000..344e895
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationgrainmergelegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationgrainmergelegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_GRAIN_MERGE_LEGACY_H__
+#define __GIMP_OPERATION_GRAIN_MERGE_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_GRAIN_MERGE_LEGACY            (gimp_operation_grain_merge_legacy_get_type ())
+#define GIMP_OPERATION_GRAIN_MERGE_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_GRAIN_MERGE_LEGACY, GimpOperationGrainMergeLegacy))
+#define GIMP_OPERATION_GRAIN_MERGE_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_GRAIN_MERGE_LEGACY, GimpOperationGrainMergeLegacyClass))
+#define GIMP_IS_OPERATION_GRAIN_MERGE_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_GRAIN_MERGE_LEGACY))
+#define GIMP_IS_OPERATION_GRAIN_MERGE_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_GRAIN_MERGE_LEGACY))
+#define GIMP_OPERATION_GRAIN_MERGE_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_GRAIN_MERGE_LEGACY, GimpOperationGrainMergeLegacyClass))
+
+
+typedef struct _GimpOperationGrainMergeLegacy      GimpOperationGrainMergeLegacy;
+typedef struct _GimpOperationGrainMergeLegacyClass GimpOperationGrainMergeLegacyClass;
+
+struct _GimpOperationGrainMergeLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationGrainMergeLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_grain_merge_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_GRAIN_MERGE_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationhardlightlegacy.c b/app/operations/layer-modes-legacy/gimpoperationhardlightlegacy.c
new file mode 100644
index 0000000..68f8eda
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationhardlightlegacy.c
@@ -0,0 +1,135 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationhardlightmode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationhardlightlegacy.h"
+
+
+static gboolean   gimp_operation_hardlight_legacy_process (GeglOperation       *op,
+                                                           void                *in,
+                                                           void                *layer,
+                                                           void                *mask,
+                                                           void                *out,
+                                                           glong                samples,
+                                                           const GeglRectangle *roi,
+                                                           gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationHardlightLegacy, gimp_operation_hardlight_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_hardlight_legacy_class_init (GimpOperationHardlightLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:hardlight-legacy",
+                                 "description", "GIMP hardlight mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_hardlight_legacy_process;
+}
+
+static void
+gimp_operation_hardlight_legacy_init (GimpOperationHardlightLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_hardlight_legacy_process (GeglOperation       *op,
+                                         void                *in_p,
+                                         void                *layer_p,
+                                         void                *mask_p,
+                                         void                *out_p,
+                                         glong                samples,
+                                         const GeglRectangle *roi,
+                                         gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gfloat ratio = comp_alpha / new_alpha;
+          gint   b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp;
+
+              if (layer[b] > 128.0f / 255.0f)
+                {
+                  comp = (1.0 - in[b]) * (1.0 - (layer[b] - 128.0f / 255.0f) * 2.0f);
+                  comp = MIN (1.0f - comp, 1.0f);
+                }
+              else
+                {
+                  comp = in[b] * (layer[b] * 2.0f);
+                  comp = MIN (comp, 1.0f);
+                }
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask ++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationhardlightlegacy.h b/app/operations/layer-modes-legacy/gimpoperationhardlightlegacy.h
new file mode 100644
index 0000000..38791be
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationhardlightlegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationhardlightlegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_HARDLIGHT_LEGACY_H__
+#define __GIMP_OPERATION_HARDLIGHT_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_HARDLIGHT_LEGACY            (gimp_operation_hardlight_legacy_get_type ())
+#define GIMP_OPERATION_HARDLIGHT_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_HARDLIGHT_LEGACY, GimpOperationHardlightLegacy))
+#define GIMP_OPERATION_HARDLIGHT_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_HARDLIGHT_LEGACY, GimpOperationHardlightLegacyClass))
+#define GIMP_IS_OPERATION_HARDLIGHT_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_HARDLIGHT_LEGACY))
+#define GIMP_IS_OPERATION_HARDLIGHT_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_HARDLIGHT_LEGACY))
+#define GIMP_OPERATION_HARDLIGHT_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_HARDLIGHT_LEGACY, GimpOperationHardlightLegacyClass))
+
+
+typedef struct _GimpOperationHardlightLegacy      GimpOperationHardlightLegacy;
+typedef struct _GimpOperationHardlightLegacyClass GimpOperationHardlightLegacyClass;
+
+struct _GimpOperationHardlightLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationHardlightLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_hardlight_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_HARDLIGHT_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationhslcolorlegacy.c b/app/operations/layer-modes-legacy/gimpoperationhslcolorlegacy.c
new file mode 100644
index 0000000..6fd7a95
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationhslcolorlegacy.c
@@ -0,0 +1,141 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationcolormode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+#include <cairo.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpcolor/gimpcolor.h"
+
+#include "../operations-types.h"
+
+#include "gimpoperationhslcolorlegacy.h"
+
+
+static gboolean   gimp_operation_hsl_color_legacy_process (GeglOperation       *op,
+                                                           void                *in,
+                                                           void                *layer,
+                                                           void                *mask,
+                                                           void                *out,
+                                                           glong                samples,
+                                                           const GeglRectangle *roi,
+                                                           gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationHslColorLegacy, gimp_operation_hsl_color_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_hsl_color_legacy_class_init (GimpOperationHslColorLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:hsl-color-legacy",
+                                 "description", "GIMP color mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_hsl_color_legacy_process;
+}
+
+static void
+gimp_operation_hsl_color_legacy_init (GimpOperationHslColorLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_hsl_color_legacy_process (GeglOperation       *op,
+                                         void                *in_p,
+                                         void                *layer_p,
+                                         void                *mask_p,
+                                         void                *out_p,
+                                         glong                samples,
+                                         const GeglRectangle *roi,
+                                         gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      GimpHSL layer_hsl, out_hsl;
+      GimpRGB layer_rgb = {layer[0], layer[1], layer[2]};
+      GimpRGB out_rgb   = {in[0], in[1], in[2]};
+      gfloat  comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gint   b;
+          gfloat out_tmp[3];
+          gfloat ratio = comp_alpha / new_alpha;
+
+          gimp_rgb_to_hsl (&layer_rgb, &layer_hsl);
+          gimp_rgb_to_hsl (&out_rgb, &out_hsl);
+
+          out_hsl.h = layer_hsl.h;
+          out_hsl.s = layer_hsl.s;
+          gimp_hsl_to_rgb (&out_hsl, &out_rgb);
+
+          out_tmp[0] = out_rgb.r;
+          out_tmp[1] = out_rgb.g;
+          out_tmp[2] = out_rgb.b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = out_tmp[b] * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationhslcolorlegacy.h b/app/operations/layer-modes-legacy/gimpoperationhslcolorlegacy.h
new file mode 100644
index 0000000..add2933
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationhslcolorlegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationhslcolorlegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_HSL_COLOR_LEGACY_H__
+#define __GIMP_OPERATION_HSL_COLOR_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_HSL_COLOR_LEGACY            (gimp_operation_hsl_color_legacy_get_type ())
+#define GIMP_OPERATION_HSL_COLOR_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_HSL_COLOR_LEGACY, GimpOperationHslColorLegacy))
+#define GIMP_OPERATION_HSL_COLOR_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_HSL_COLOR_LEGACY, GimpOperationHslColorLegacyClass))
+#define GIMP_IS_OPERATION_HSL_COLOR_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_HSL_COLOR_LEGACY))
+#define GIMP_IS_OPERATION_HSL_COLOR_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_HSL_COLOR_LEGACY))
+#define GIMP_OPERATION_HSL_COLOR_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_HSL_COLOR_LEGACY, GimpOperationHslColorLegacyClass))
+
+
+typedef struct _GimpOperationHslColorLegacy      GimpOperationHslColorLegacy;
+typedef struct _GimpOperationHslColorLegacyClass GimpOperationHslColorLegacyClass;
+
+struct _GimpOperationHslColorLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationHslColorLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_hsl_color_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_HSL_COLOR_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationhsvhuelegacy.c b/app/operations/layer-modes-legacy/gimpoperationhsvhuelegacy.c
new file mode 100644
index 0000000..eb9c040
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationhsvhuelegacy.c
@@ -0,0 +1,146 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationhuemode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <cairo.h>
+#include <gegl-plugin.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpcolor/gimpcolor.h"
+
+#include "../operations-types.h"
+
+#include "gimpoperationhsvhuelegacy.h"
+
+
+static gboolean   gimp_operation_hsv_hue_legacy_process (GeglOperation       *op,
+                                                         void                *in,
+                                                         void                *layer,
+                                                         void                *mask,
+                                                         void                *out,
+                                                         glong                samples,
+                                                         const GeglRectangle *roi,
+                                                         gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationHsvHueLegacy, gimp_operation_hsv_hue_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_hsv_hue_legacy_class_init (GimpOperationHsvHueLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:hsv-hue-legacy",
+                                 "description", "GIMP hue mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_hsv_hue_legacy_process;
+}
+
+static void
+gimp_operation_hsv_hue_legacy_init (GimpOperationHsvHueLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_hsv_hue_legacy_process (GeglOperation       *op,
+                                       void                *in_p,
+                                       void                *layer_p,
+                                       void                *mask_p,
+                                       void                *out_p,
+                                       glong                samples,
+                                       const GeglRectangle *roi,
+                                       gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      GimpHSV layer_hsv, out_hsv;
+      GimpRGB layer_rgb = {layer[0], layer[1], layer[2]};
+      GimpRGB out_rgb   = {in[0], in[1], in[2]};
+      gfloat  comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gint   b;
+          gfloat out_tmp[3];
+          gfloat ratio = comp_alpha / new_alpha;
+
+          gimp_rgb_to_hsv (&layer_rgb, &layer_hsv);
+          gimp_rgb_to_hsv (&out_rgb, &out_hsv);
+
+          /*  Composition should have no effect if saturation is zero.
+           *  otherwise, black would be painted red (see bug #123296).
+           */
+          if (layer_hsv.s)
+            {
+              out_hsv.h = layer_hsv.h;
+            }
+          gimp_hsv_to_rgb (&out_hsv, &out_rgb);
+
+          out_tmp[0] = out_rgb.r;
+          out_tmp[1] = out_rgb.g;
+          out_tmp[2] = out_rgb.b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = out_tmp[b] * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationhsvhuelegacy.h b/app/operations/layer-modes-legacy/gimpoperationhsvhuelegacy.h
new file mode 100644
index 0000000..59ef125
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationhsvhuelegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationhsvhuelegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_HSV_HUE_LEGACY_H__
+#define __GIMP_OPERATION_HSV_HUE_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_HSV_HUE_LEGACY            (gimp_operation_hsv_hue_legacy_get_type ())
+#define GIMP_OPERATION_HSV_HUE_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_HSV_HUE_LEGACY, GimpOperationHsvHueLegacy))
+#define GIMP_OPERATION_HSV_HUE_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_HSV_HUE_LEGACY, GimpOperationHsvHueLegacyClass))
+#define GIMP_IS_OPERATION_HSV_HUE_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_HSV_HUE_LEGACY))
+#define GIMP_IS_OPERATION_HSV_HUE_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_HSV_HUE_LEGACY))
+#define GIMP_OPERATION_HSV_HUE_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_HSV_HUE_LEGACY, GimpOperationHsvHueLegacyClass))
+
+
+typedef struct _GimpOperationHsvHueLegacy      GimpOperationHsvHueLegacy;
+typedef struct _GimpOperationHsvHueLegacyClass GimpOperationHsvHueLegacyClass;
+
+struct _GimpOperationHsvHueLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationHsvHueLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_hsv_hue_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_HSV_HUE_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationhsvsaturationlegacy.c b/app/operations/layer-modes-legacy/gimpoperationhsvsaturationlegacy.c
new file mode 100644
index 0000000..d150aa1
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationhsvsaturationlegacy.c
@@ -0,0 +1,140 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationsaturationmode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+#include <cairo.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpcolor/gimpcolor.h"
+
+#include "../operations-types.h"
+
+#include "gimpoperationhsvsaturationlegacy.h"
+
+
+static gboolean   gimp_operation_hsv_saturation_legacy_process (GeglOperation       *op,
+                                                                void                *in,
+                                                                void                *layer,
+                                                                void                *mask,
+                                                                void                *out,
+                                                                glong                samples,
+                                                                const GeglRectangle *roi,
+                                                                gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationHsvSaturationLegacy, gimp_operation_hsv_saturation_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_hsv_saturation_legacy_class_init (GimpOperationHsvSaturationLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:hsv-saturation-legacy",
+                                 "description", "GIMP saturation mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_hsv_saturation_legacy_process;
+}
+
+static void
+gimp_operation_hsv_saturation_legacy_init (GimpOperationHsvSaturationLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_hsv_saturation_legacy_process (GeglOperation       *op,
+                                              void                *in_p,
+                                              void                *layer_p,
+                                              void                *mask_p,
+                                              void                *out_p,
+                                              glong                samples,
+                                              const GeglRectangle *roi,
+                                              gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      GimpHSV layer_hsv, out_hsv;
+      GimpRGB layer_rgb = {layer[0], layer[1], layer[2]};
+      GimpRGB out_rgb   = {in[0], in[1], in[2]};
+      gfloat  comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gint   b;
+          gfloat out_tmp[3];
+          gfloat ratio = comp_alpha / new_alpha;
+
+          gimp_rgb_to_hsv (&layer_rgb, &layer_hsv);
+          gimp_rgb_to_hsv (&out_rgb, &out_hsv);
+
+          out_hsv.s = layer_hsv.s;
+          gimp_hsv_to_rgb (&out_hsv, &out_rgb);
+
+          out_tmp[0] = out_rgb.r;
+          out_tmp[1] = out_rgb.g;
+          out_tmp[2] = out_rgb.b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = out_tmp[b] * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationhsvsaturationlegacy.h b/app/operations/layer-modes-legacy/gimpoperationhsvsaturationlegacy.h
new file mode 100644
index 0000000..ecb5589
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationhsvsaturationlegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationhsvsaturationlegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_HSV_SATURATION_LEGACY_H__
+#define __GIMP_OPERATION_HSV_SATURATION_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_HSV_SATURATION_LEGACY            (gimp_operation_hsv_saturation_legacy_get_type ())
+#define GIMP_OPERATION_HSV_SATURATION_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_HSV_SATURATION_LEGACY, GimpOperationHsvSaturationLegacy))
+#define GIMP_OPERATION_HSV_SATURATION_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_HSV_SATURATION_LEGACY, GimpOperationHsvSaturationLegacyClass))
+#define GIMP_IS_OPERATION_HSV_SATURATION_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_HSV_SATURATION_LEGACY))
+#define GIMP_IS_OPERATION_HSV_SATURATION_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_HSV_SATURATION_LEGACY))
+#define GIMP_OPERATION_HSV_SATURATION_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_HSV_SATURATION_LEGACY, GimpOperationHsvSaturationLegacyClass))
+
+
+typedef struct _GimpOperationHsvSaturationLegacy      GimpOperationHsvSaturationLegacy;
+typedef struct _GimpOperationHsvSaturationLegacyClass GimpOperationHsvSaturationLegacyClass;
+
+struct _GimpOperationHsvSaturationLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationHsvSaturationLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_hsv_saturation_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_HSV_SATURATION_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationhsvvaluelegacy.c b/app/operations/layer-modes-legacy/gimpoperationhsvvaluelegacy.c
new file mode 100644
index 0000000..b873325
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationhsvvaluelegacy.c
@@ -0,0 +1,140 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationvaluemode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+#include <cairo.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpcolor/gimpcolor.h"
+
+#include "../operations-types.h"
+
+#include "gimpoperationhsvvaluelegacy.h"
+
+
+static gboolean   gimp_operation_hsv_value_legacy_process (GeglOperation       *op,
+                                                           void                *in,
+                                                           void                *layer,
+                                                           void                *mask,
+                                                           void                *out,
+                                                           glong                samples,
+                                                           const GeglRectangle *roi,
+                                                           gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationHsvValueLegacy, gimp_operation_hsv_value_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_hsv_value_legacy_class_init (GimpOperationHsvValueLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:hsv-value-legacy",
+                                 "description", "GIMP value mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_hsv_value_legacy_process;
+}
+
+static void
+gimp_operation_hsv_value_legacy_init (GimpOperationHsvValueLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_hsv_value_legacy_process (GeglOperation       *op,
+                                         void                *in_p,
+                                         void                *layer_p,
+                                         void                *mask_p,
+                                         void                *out_p,
+                                         glong                samples,
+                                         const GeglRectangle *roi,
+                                         gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      GimpHSV layer_hsv, out_hsv;
+      GimpRGB layer_rgb = {layer[0], layer[1], layer[2]};
+      GimpRGB out_rgb   = {in[0], in[1], in[2]};
+      gfloat  comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gint   b;
+          gfloat out_tmp[3];
+          gfloat ratio = comp_alpha / new_alpha;
+
+          gimp_rgb_to_hsv (&layer_rgb, &layer_hsv);
+          gimp_rgb_to_hsv (&out_rgb, &out_hsv);
+
+          out_hsv.v = layer_hsv.v;
+          gimp_hsv_to_rgb (&out_hsv, &out_rgb);
+
+          out_tmp[0] = out_rgb.r;
+          out_tmp[1] = out_rgb.g;
+          out_tmp[2] = out_rgb.b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = out_tmp[b] * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationhsvvaluelegacy.h b/app/operations/layer-modes-legacy/gimpoperationhsvvaluelegacy.h
new file mode 100644
index 0000000..7701ffd
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationhsvvaluelegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationhsvvaluelegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_HSV_VALUE_LEGACY_H__
+#define __GIMP_OPERATION_HSV_VALUE_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_HSV_VALUE_LEGACY            (gimp_operation_hsv_value_legacy_get_type ())
+#define GIMP_OPERATION_HSV_VALUE_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_HSV_VALUE_LEGACY, GimpOperationHsvValueLegacy))
+#define GIMP_OPERATION_HSV_VALUE_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_HSV_VALUE_LEGACY, GimpOperationHsvValueLegacyClass))
+#define GIMP_IS_OPERATION_HSV_VALUE_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_HSV_VALUE_LEGACY))
+#define GIMP_IS_OPERATION_HSV_VALUE_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_HSV_VALUE_LEGACY))
+#define GIMP_OPERATION_HSV_VALUE_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_HSV_VALUE_LEGACY, GimpOperationHsvValueLegacyClass))
+
+
+typedef struct _GimpOperationHsvValueLegacy      GimpOperationHsvValueLegacy;
+typedef struct _GimpOperationHsvValueLegacyClass GimpOperationHsvValueLegacyClass;
+
+struct _GimpOperationHsvValueLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationHsvValueLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_hsv_value_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_HSV_VALUE_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationlightenonlylegacy.c b/app/operations/layer-modes-legacy/gimpoperationlightenonlylegacy.c
new file mode 100644
index 0000000..0e54a0c
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationlightenonlylegacy.c
@@ -0,0 +1,124 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationlightenonlylegacy.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationlightenonlylegacy.h"
+
+
+static gboolean   gimp_operation_lighten_only_legacy_process (GeglOperation       *op,
+                                                              void                *in,
+                                                              void                *layer,
+                                                              void                *mask,
+                                                              void                *out,
+                                                              glong                samples,
+                                                              const GeglRectangle *roi,
+                                                              gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationLightenOnlyLegacy, gimp_operation_lighten_only_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_lighten_only_legacy_class_init (GimpOperationLightenOnlyLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:lighten-only-legacy",
+                                 "description", "GIMP lighten only legacy operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_lighten_only_legacy_process;
+}
+
+static void
+gimp_operation_lighten_only_legacy_init (GimpOperationLightenOnlyLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_lighten_only_legacy_process (GeglOperation       *op,
+                                            void                *in_p,
+                                            void                *layer_p,
+                                            void                *mask_p,
+                                            void                *out_p,
+                                            glong                samples,
+                                            const GeglRectangle *roi,
+                                            gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gint   b;
+          gfloat ratio = comp_alpha / new_alpha;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = MAX (layer[b], in[b]);
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationlightenonlylegacy.h b/app/operations/layer-modes-legacy/gimpoperationlightenonlylegacy.h
new file mode 100644
index 0000000..2417d57
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationlightenonlylegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationlightenonlylegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_LIGHTEN_ONLY_LEGACY_H__
+#define __GIMP_OPERATION_LIGHTEN_ONLY_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_LIGHTEN_ONLY_LEGACY            (gimp_operation_lighten_only_legacy_get_type ())
+#define GIMP_OPERATION_LIGHTEN_ONLY_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_LIGHTEN_ONLY_LEGACY, GimpOperationLightenOnlyLegacy))
+#define GIMP_OPERATION_LIGHTEN_ONLY_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_LIGHTEN_ONLY_LEGACY, GimpOperationLightenOnlyLegacyClass))
+#define GIMP_IS_OPERATION_LIGHTEN_ONLY_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_LIGHTEN_ONLY_LEGACY))
+#define GIMP_IS_OPERATION_LIGHTEN_ONLY_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_LIGHTEN_ONLY_LEGACY))
+#define GIMP_OPERATION_LIGHTEN_ONLY_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_LIGHTEN_ONLY_LEGACY, GimpOperationLightenOnlyLegacyClass))
+
+
+typedef struct _GimpOperationLightenOnlyLegacy      GimpOperationLightenOnlyLegacy;
+typedef struct _GimpOperationLightenOnlyLegacyClass GimpOperationLightenOnlyLegacyClass;
+
+struct _GimpOperationLightenOnlyLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationLightenOnlyLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_lighten_only_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_LIGHTEN_ONLY_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationmultiplylegacy.c b/app/operations/layer-modes-legacy/gimpoperationmultiplylegacy.c
new file mode 100644
index 0000000..69c63c4
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationmultiplylegacy.c
@@ -0,0 +1,124 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationmultiplylegacy.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "operations/operations-types.h"
+
+#include "gimpoperationmultiplylegacy.h"
+
+
+static gboolean   gimp_operation_multiply_legacy_process (GeglOperation       *op,
+                                                          void                *in,
+                                                          void                *layer,
+                                                          void                *mask,
+                                                          void                *out,
+                                                          glong                samples,
+                                                          const GeglRectangle *roi,
+                                                          gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationMultiplyLegacy, gimp_operation_multiply_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_multiply_legacy_class_init (GimpOperationMultiplyLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:multiply-legacy",
+                                 "description", "GIMP multiply legacy operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_multiply_legacy_process;
+}
+
+static void
+gimp_operation_multiply_legacy_init (GimpOperationMultiplyLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_multiply_legacy_process (GeglOperation       *op,
+                                        void                *in_p,
+                                        void                *layer_p,
+                                        void                *mask_p,
+                                        void                *out_p,
+                                        glong                samples,
+                                        const GeglRectangle *roi,
+                                        gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gfloat ratio = comp_alpha / new_alpha;
+          gint   b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = layer[b] * in[b];
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationmultiplylegacy.h b/app/operations/layer-modes-legacy/gimpoperationmultiplylegacy.h
new file mode 100644
index 0000000..f099ebd
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationmultiplylegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationmultiplylegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_MULTIPLY_LEGACY_H__
+#define __GIMP_OPERATION_MULTIPLY_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_MULTIPLY_LEGACY            (gimp_operation_multiply_legacy_get_type ())
+#define GIMP_OPERATION_MULTIPLY_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_MULTIPLY_LEGACY, GimpOperationMultiplyLegacy))
+#define GIMP_OPERATION_MULTIPLY_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_MULTIPLY_LEGACY, GimpOperationMultiplyLegacyClass))
+#define GIMP_IS_OPERATION_MULTIPLY_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_MULTIPLY_LEGACY))
+#define GIMP_IS_OPERATION_MULTIPLY_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_MULTIPLY_LEGACY))
+#define GIMP_OPERATION_MULTIPLY_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_MULTIPLY_LEGACY, GimpOperationMultiplyLegacyClass))
+
+
+typedef struct _GimpOperationMultiplyLegacy      GimpOperationMultiplyLegacy;
+typedef struct _GimpOperationMultiplyLegacyClass GimpOperationMultiplyLegacyClass;
+
+struct _GimpOperationMultiplyLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationMultiplyLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_multiply_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_MULTIPLY_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationscreenlegacy.c b/app/operations/layer-modes-legacy/gimpoperationscreenlegacy.c
new file mode 100644
index 0000000..f2ff2fc
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationscreenlegacy.c
@@ -0,0 +1,124 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationscreenlegacy.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationscreenlegacy.h"
+
+
+static gboolean   gimp_operation_screen_legacy_process (GeglOperation       *op,
+                                                        void                *in,
+                                                        void                *layer,
+                                                        void                *mask,
+                                                        void                *out,
+                                                        glong                samples,
+                                                        const GeglRectangle *roi,
+                                                        gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationScreenLegacy, gimp_operation_screen_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_screen_legacy_class_init (GimpOperationScreenLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:screen-legacy",
+                                 "description", "GIMP screen mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_screen_legacy_process;
+}
+
+static void
+gimp_operation_screen_legacy_init (GimpOperationScreenLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_screen_legacy_process (GeglOperation       *op,
+                                      void                *in_p,
+                                      void                *layer_p,
+                                      void                *mask_p,
+                                      void                *out_p,
+                                      glong                samples,
+                                      const GeglRectangle *roi,
+                                      gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gfloat ratio = comp_alpha / new_alpha;
+          gint   b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = 1.0f - (1.0f - in[b]) * (1.0f - layer[b]);
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationscreenlegacy.h b/app/operations/layer-modes-legacy/gimpoperationscreenlegacy.h
new file mode 100644
index 0000000..5d0dc9e
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationscreenlegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationscreenlegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_SCREEN_LEGACY_H__
+#define __GIMP_OPERATION_SCREEN_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_SCREEN_LEGACY            (gimp_operation_screen_legacy_get_type ())
+#define GIMP_OPERATION_SCREEN_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_SCREEN_LEGACY, GimpOperationScreenLegacy))
+#define GIMP_OPERATION_SCREEN_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_SCREEN_LEGACY, GimpOperationScreenLegacyClass))
+#define GIMP_IS_OPERATION_SCREEN_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_SCREEN_LEGACY))
+#define GIMP_IS_OPERATION_SCREEN_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_SCREEN_LEGACY))
+#define GIMP_OPERATION_SCREEN_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_SCREEN_LEGACY, GimpOperationScreenLegacyClass))
+
+
+typedef struct _GimpOperationScreenLegacy      GimpOperationScreenLegacy;
+typedef struct _GimpOperationScreenLegacyClass GimpOperationScreenLegacyClass;
+
+struct _GimpOperationScreenLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationScreenLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_screen_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_SCREEN_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationsoftlightlegacy.c b/app/operations/layer-modes-legacy/gimpoperationsoftlightlegacy.c
new file mode 100644
index 0000000..1736e00
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationsoftlightlegacy.c
@@ -0,0 +1,157 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationsoftlightmode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationsoftlightlegacy.h"
+
+
+static gboolean   gimp_operation_softlight_legacy_process (GeglOperation       *op,
+                                                           void                *in,
+                                                           void                *layer,
+                                                           void                *mask,
+                                                           void                *out,
+                                                           glong                samples,
+                                                           const GeglRectangle *roi,
+                                                           gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationSoftlightLegacy, gimp_operation_softlight_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static const gchar* reference_xml = "<?xml version='1.0' encoding='UTF-8'?>"
+"<gegl>"
+"<node operation='gimp:softlight-legacy'>"
+"  <node operation='gegl:load'>"
+"    <params>"
+"      <param name='path'>B.png</param>"
+"    </params>"
+"  </node>"
+"</node>"
+"<node operation='gegl:load'>"
+"  <params>"
+"    <param name='path'>A.png</param>"
+"  </params>"
+"</node>"
+"</gegl>";
+
+
+static void
+gimp_operation_softlight_legacy_class_init (GimpOperationSoftlightLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:softlight-legacy",
+                                 "description", "GIMP softlight mode operation",
+                                 "reference-image", "soft-light-mode.png",
+                                 "reference-composition", reference_xml,
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_softlight_legacy_process;
+}
+
+static void
+gimp_operation_softlight_legacy_init (GimpOperationSoftlightLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_softlight_legacy_process (GeglOperation       *op,
+                                         void                *in_p,
+                                         void                *layer_p,
+                                         void                *mask_p,
+                                         void                *out_p,
+                                         glong                samples,
+                                         const GeglRectangle *roi,
+                                         gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gfloat ratio = comp_alpha / new_alpha;
+          gint   b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+#if 0
+              /* softlight is now used for what GIMP formerly called
+               * OVERLAY.  We fixed OVERLAY to use the right math
+               * (under the name NEW_OVERLAY), and redirect uses of
+               * the old OVERLAY blend mode here. This math was
+               * formerly used for OVERLAY and is exactly the same as
+               * the multiply, screen, comp math used below.
+               * See bug #673501.
+               */
+              gfloat comp = in[b] * (in[b] + (2.0f * layer[b]) * (1.0f - in[b]));
+#endif
+
+              gfloat multiply = in[b] * layer[b];
+              gfloat screen   = 1.0f - (1.0f - in[b]) * (1.0f - layer[b]);
+              gfloat comp     = (1.0f - in[b]) * multiply + in[b] * screen;
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask ++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationsoftlightlegacy.h b/app/operations/layer-modes-legacy/gimpoperationsoftlightlegacy.h
new file mode 100644
index 0000000..aa8930e
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationsoftlightlegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationsoftlightlegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_SOFTLIGHT_LEGACY_H__
+#define __GIMP_OPERATION_SOFTLIGHT_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_SOFTLIGHT_LEGACY            (gimp_operation_softlight_legacy_get_type ())
+#define GIMP_OPERATION_SOFTLIGHT_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_SOFTLIGHT_LEGACY, GimpOperationSoftlightLegacy))
+#define GIMP_OPERATION_SOFTLIGHT_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_SOFTLIGHT_LEGACY, GimpOperationSoftlightLegacyClass))
+#define GIMP_IS_OPERATION_SOFTLIGHT_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_SOFTLIGHT_LEGACY))
+#define GIMP_IS_OPERATION_SOFTLIGHT_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_SOFTLIGHT_LEGACY))
+#define GIMP_OPERATION_SOFTLIGHT_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_SOFTLIGHT_LEGACY, GimpOperationSoftlightLegacyClass))
+
+
+typedef struct _GimpOperationSoftlightLegacy      GimpOperationSoftlightLegacy;
+typedef struct _GimpOperationSoftlightLegacyClass GimpOperationSoftlightLegacyClass;
+
+struct _GimpOperationSoftlightLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationSoftlightLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_softlight_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_SOFTLIGHT_LEGACY_H__ */
diff --git a/app/operations/layer-modes-legacy/gimpoperationsubtractlegacy.c b/app/operations/layer-modes-legacy/gimpoperationsubtractlegacy.c
new file mode 100644
index 0000000..0bf3b5e
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationsubtractlegacy.c
@@ -0,0 +1,125 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationsubtractmode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationsubtractlegacy.h"
+
+
+static gboolean   gimp_operation_subtract_legacy_process (GeglOperation       *op,
+                                                          void                *in,
+                                                          void                *layer,
+                                                          void                *mask,
+                                                          void                *out,
+                                                          glong                samples,
+                                                          const GeglRectangle *roi,
+                                                          gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationSubtractLegacy, gimp_operation_subtract_legacy,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_subtract_legacy_class_init (GimpOperationSubtractLegacyClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:subtract-legacy",
+                                 "description", "GIMP subtract mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_subtract_legacy_process;
+}
+
+static void
+gimp_operation_subtract_legacy_init (GimpOperationSubtractLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_subtract_legacy_process (GeglOperation       *op,
+                                        void                *in_p,
+                                        void                *layer_p,
+                                        void                *mask_p,
+                                        void                *out_p,
+                                        glong                samples,
+                                        const GeglRectangle *roi,
+                                        gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gint   b;
+          gfloat ratio = comp_alpha / new_alpha;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = in[b] - layer[b];
+              comp = CLAMP (comp, 0.0f, 1.0f);
+
+              out[b] = comp * ratio + in[b] * (1.0f - ratio);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (mask)
+        mask++;
+    }
+
+  return TRUE;
+}
diff --git a/app/operations/layer-modes-legacy/gimpoperationsubtractlegacy.h b/app/operations/layer-modes-legacy/gimpoperationsubtractlegacy.h
new file mode 100644
index 0000000..34a55d5
--- /dev/null
+++ b/app/operations/layer-modes-legacy/gimpoperationsubtractlegacy.h
@@ -0,0 +1,53 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationsubtractlegacy.h
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_OPERATION_SUBTRACT_LEGACY_H__
+#define __GIMP_OPERATION_SUBTRACT_LEGACY_H__
+
+
+#include "operations/layer-modes/gimpoperationlayermode.h"
+
+
+#define GIMP_TYPE_OPERATION_SUBTRACT_LEGACY            (gimp_operation_subtract_legacy_get_type ())
+#define GIMP_OPERATION_SUBTRACT_LEGACY(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_OPERATION_SUBTRACT_LEGACY, GimpOperationSubtractLegacy))
+#define GIMP_OPERATION_SUBTRACT_LEGACY_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_OPERATION_SUBTRACT_LEGACY, GimpOperationSubtractLegacyClass))
+#define GIMP_IS_OPERATION_SUBTRACT_LEGACY(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_OPERATION_SUBTRACT_LEGACY))
+#define GIMP_IS_OPERATION_SUBTRACT_LEGACY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_OPERATION_SUBTRACT_LEGACY))
+#define GIMP_OPERATION_SUBTRACT_LEGACY_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_OPERATION_SUBTRACT_LEGACY, GimpOperationSubtractLegacyClass))
+
+
+typedef struct _GimpOperationSubtractLegacy      GimpOperationSubtractLegacy;
+typedef struct _GimpOperationSubtractLegacyClass GimpOperationSubtractLegacyClass;
+
+struct _GimpOperationSubtractLegacy
+{
+  GimpOperationLayerMode  parent_instance;
+};
+
+struct _GimpOperationSubtractLegacyClass
+{
+  GimpOperationLayerModeClass  parent_class;
+};
+
+
+GType   gimp_operation_subtract_legacy_get_type (void) G_GNUC_CONST;
+
+
+#endif /* __GIMP_OPERATION_SUBTRACT_LEGACY_H__ */