13 files changed, 7339 insertions, 0 deletions
diff --git a/plug-ins/gradient-flare/Makefile.am b/plug-ins/gradient-flare/Makefile.am
new file mode 100644
index 0000000..f531be4
--- /dev/null
+++ b/plug-ins/gradient-flare/Makefile.am
@@ -0,0 +1,51 @@
+## Process this file with automake to produce Makefile.in
+
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+
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+
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+
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+	$(libgimpui)		\
+	$(libgimpwidgets)	\
+	$(libgimpconfig)	\
+	$(libgimp)		\
+	$(libgimpcolor)		\
+	$(libgimpmath)		\
+	$(libgimpbase)		\
+	$(GTK_LIBS)		\
+	$(GEGL_LIBS)		\
+	$(RT_LIBS)		\
+	$(INTLLIBS)		\
+	$(gradient_flare_RC)
diff --git a/plug-ins/gradient-flare/Makefile.in b/plug-ins/gradient-flare/Makefile.in
new file mode 100644
index 0000000..9739640
--- /dev/null
+++ b/plug-ins/gradient-flare/Makefile.in
@@ -0,0 +1,1116 @@
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+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
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+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+	@list='$(DIST_SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    $(am__make_dryrun) \
+	      || test -d "$(distdir)/$$subdir" \
+	      || $(MKDIR_P) "$(distdir)/$$subdir" \
+	      || exit 1; \
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+	    $(am__relativize); \
+	    new_distdir=$$reldir; \
+	    dir1=$$subdir; dir2="$(top_distdir)"; \
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+	    new_top_distdir=$$reldir; \
+	    echo " (cd $$subdir && $(MAKE) $(AM_MAKEFLAGS) top_distdir="$$new_top_distdir" distdir="$$new_distdir" \\"; \
+	    echo "     am__remove_distdir=: am__skip_length_check=: am__skip_mode_fix=: distdir)"; \
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+check-am: all-am
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+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-recursive
+
+clean-am: clean-generic clean-libexecPROGRAMS clean-libtool \
+	mostlyclean-am
+
+distclean: distclean-recursive
+		-rm -f ./$(DEPDIR)/gradient-flare.Po
+	-rm -f Makefile
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+	distclean-tags
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+dvi: dvi-recursive
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+install-exec-am: install-libexecPROGRAMS
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+install-html: install-html-recursive
+
+install-html-am:
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+install-info: install-info-recursive
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+install-pdf: install-pdf-recursive
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+install-ps: install-ps-recursive
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+
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+.PRECIOUS: Makefile
+
+
+# `windres` seems a very stupid tool and it breaks with double shlashes
+# in parameter paths. Strengthen the rule a little.
+@HAVE_WINDRES_TRUE@%.rc.o:
+@HAVE_WINDRES_TRUE@	$(WINDRES) --define ORIGINALFILENAME_STR="$*$(EXEEXT)" \
+@HAVE_WINDRES_TRUE@		--define INTERNALNAME_STR="$*" \
+@HAVE_WINDRES_TRUE@		--define TOP_SRCDIR="`echo $(top_srcdir) | sed 's*//*/*'`" \
+@HAVE_WINDRES_TRUE@		-I"`echo $(top_srcdir)/app | sed 's%/\+%/%'`" \
+@HAVE_WINDRES_TRUE@		-I"`echo $(top_builddir)/app | sed 's%/\+%/%'`"\
+@HAVE_WINDRES_TRUE@		-I"`echo $(top_builddir) | sed 's%/\+%/%'`"\
+@HAVE_WINDRES_TRUE@		$(GIMPPLUGINRC) $@
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
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diff --git a/plug-ins/gradient-flare/README b/plug-ins/gradient-flare/README
new file mode 100644
index 0000000..92c1095
--- /dev/null
+++ b/plug-ins/gradient-flare/README
@@ -0,0 +1,99 @@
+==========================================================================
+
+	GFlare plug-in ver 0.25
+
+		Eiichi Takamori <taka@ma1.seikyou.ne.jp>
+
+==========================================================================
+
+  GFlare is a plug-in for GIMP.  The name "GFlare" is short for
+"Gradient Flare".  It renders lense flare effect using custom
+gradients.  The basic idea is suggested by Marcelo Malheiros,
+originally based on a 3DStudio MAX plug-in called LenZFX:
+	http://www.digimation.com/techsupp/lzfxfeat.htm
+
+INSTALL:
+
+1) Edit Makefile, if needed.
+
+2) Type "make install".
+
+3) Type "make install-data" if needed. (It copies sample gradients and
+   gflares under ~/.gimp)
+
+3) Add new entry to ~/.gimp/gimprc as
+     (gflare-path "${gimp_dir}/gflares:${gimp_data_dir}/gflares")
+
+3) Run GIMP. The menu path is <Image>/Filters/Effects/GFlare.
+
+
+HOW TO USE IT:
+
+  The document is not yet done. Try and see.
+
+  Main Dialog:
+  - Preview
+      click on it changes the position of GFlare
+  - Settings page
+    - Center, Radius (pixel), Rotation (degree), Hue Rotation (degree)
+    - Vector Angle (degree) and Vector Length (percentage to Radius)
+    - adaptive supersampling ... same as "Blend tool"
+  - Selector page
+    - ListBox
+    - New, Edit, Copy, Delete buttons. Edit button invokes GFlare Editor.
+
+  GFlare Editor:
+  - General page:
+  - Glow page:
+  - Rays page:
+  - Second Flares page:     
+
+  WARNING: This plug-in is in development stage, and the code is very
+alpha. The GFlare datafile format may be changed in future version.
+
+  Suggestions and ideas for user interface, flare algorithm, etc. are
+very welcome.
+
+
+KNOWN BUGS:
+
+  There are still lots of bugs, of course. ;-)
+  They seem related to GTK, and I don't know exactly how I can fix them.
+
+  * It warns at startup as:
+    ** WARNING **: file gdkwindow.c: line 422 (gdk_window_move_resize): "window != NULL"
+    If you are annoyed, accompanying "gtkviewport.c.patch" will shut up
+    the warning.
+  * Edit button remains prelighted when GFlare Editor dialog is done.
+  * Dialogs are not shown quickly at startup.
+  * Sometimes note tab labels are disappeared.
+  * Sometimes it crashes, but I don't know yet why it happens.
+
+TODO:
+  * Random hue scattering for Second Flares.
+  * Improve internal gradients.
+  * Currently number of Second Flares is fixed(30).
+  * Change opacity for one second flare dynamically, in inverse
+    proportion to the size of it.
+  * Reduce dialog size
+  * Add tweak ability "How to combine Glow, Rays, Second Flares in
+    what order"
+
+
+CREDITS:
+
+  Marcelo Marheiros and Federico Mena Quintero suggested a lot of
+ideas. Very Thanks!!
+
+  Marcelo made gradients whose names end with _1, _2, etc. The
+gradients whose names end with _101, _102 etc. are mine.
+
+  Quartic did awful Gradient Editor, and gradients PDB procedures.
+
+  A fair proportion of this code was taken from:
+
+  GIMP - The GNU Image Manipulation Program
+  Copyright (C) 1995 Spencer Kimball and Peter Mattis
+
+  Gradient editor module copyight (C) 1996-1997 Federico Mena Quintero
+  federico@nuclecu.unam.mx
diff --git a/plug-ins/gradient-flare/flares/Bright_Star b/plug-ins/gradient-flare/flares/Bright_Star
new file mode 100644
index 0000000..e14ba49
--- /dev/null
+++ b/plug-ins/gradient-flare/flares/Bright_Star
@@ -0,0 +1,18 @@
+GIMP GFlare 0.25
+100.000000 NORMAL
+100.000000 NORMAL
+75.000000 SCREEN
+Flare\040Glow\040Radial\0401
+%white
+%white
+75.000000 0.000000 0.000000
+Flare\040Rays\040Radial\0401
+%white
+Flare\040Rays\040Size\0401
+100.000000 -75.000000 0.000000
+16 20.000000
+%blue_grad
+%random
+%random
+16.000000 0.000000 13.600000
+POLYGON 6 1
diff --git a/plug-ins/gradient-flare/flares/Classic b/plug-ins/gradient-flare/flares/Classic
new file mode 100644
index 0000000..81a7562
--- /dev/null
+++ b/plug-ins/gradient-flare/flares/Classic
@@ -0,0 +1,18 @@
+GIMP GFlare 0.25
+100.000000 NORMAL
+40.000000 SCREEN
+20.000000 SCREEN
+Flare\040Glow\040Radial\0403
+%white
+%white
+85.000000 0.000000 0.000000
+%white_grad
+%white
+%random
+125.000000 0.000000 0.000000
+85 60.000000
+Flare\040Glow\040Radial\0404
+%random
+%random
+20.000000 0.000000 0.000000
+CIRCLE 6 1
diff --git a/plug-ins/gradient-flare/flares/Default b/plug-ins/gradient-flare/flares/Default
new file mode 100644
index 0000000..95e257f
--- /dev/null
+++ b/plug-ins/gradient-flare/flares/Default
@@ -0,0 +1,18 @@
+GIMP GFlare 0.25
+95.300003 NORMAL
+23.000000 ADDITION
+20.900000 SCREEN
+Radial\040Glow\0401
+%white
+%white
+100.000000 0.000000 -145.899994
+%white_grad
+%white_grad
+%random
+70.400002 0.000000 0.000000
+21 87.300003
+Flare\040Radial\040103
+Flare\040Sizefac\040101
+%random
+40.000000 0 0
+CIRCLE 6 1
diff --git a/plug-ins/gradient-flare/flares/Distant_Sun b/plug-ins/gradient-flare/flares/Distant_Sun
new file mode 100644
index 0000000..9d71357
--- /dev/null
+++ b/plug-ins/gradient-flare/flares/Distant_Sun
@@ -0,0 +1,18 @@
+GIMP GFlare 0.25
+100.000000 NORMAL
+90.000000 ADDITION
+50.000000 SCREEN
+Flare\040Radial\040102
+%white
+%white
+136.000000 0.000000 55.000000
+%yellow_grad
+Flare\040Glow\040Angular\0401
+%random
+110.000000 140.000000 -12.000000
+63 90.000000
+Flare\040Glow\040Radial\0404
+Flare\040Rays\040Size\0401
+%yellow_grad
+30.000000 30.000000 40.000000
+POLYGON 6 1
diff --git a/plug-ins/gradient-flare/flares/GFlare_101 b/plug-ins/gradient-flare/flares/GFlare_101
new file mode 100644
index 0000000..ce064c6
--- /dev/null
+++ b/plug-ins/gradient-flare/flares/GFlare_101
@@ -0,0 +1,18 @@
+GIMP GFlare 0.25
+100.000000 NORMAL
+50.000000 NORMAL
+35.500000 NORMAL
+Flare\040Radial\040101
+%white
+%white
+100.000000 0.000000 0.000000
+%white_grad
+%random
+%random
+100.000000 0.000000 0.000000
+40 50.000000
+Flare\040Glow\040Radial\0401
+%random
+%random
+40.000000 0 0
+CIRCLE 6 1
diff --git a/plug-ins/gradient-flare/flares/GFlare_102 b/plug-ins/gradient-flare/flares/GFlare_102
new file mode 100644
index 0000000..1540c2d
--- /dev/null
+++ b/plug-ins/gradient-flare/flares/GFlare_102
@@ -0,0 +1,18 @@
+GIMP GFlare 0.25
+100.000000 NORMAL
+62.799999 NORMAL
+37.900002 SCREEN
+Flare\040Radial\040102
+%white
+%white
+100.000000 0.000000 -85.300003
+%red_grad
+%random
+%random
+100.000000 0.000000 -155.899994
+40 20.000000
+Flare\040Radial\040102
+%random
+Skyline
+40.000000 0 0
+CIRCLE 6 3
diff --git a/plug-ins/gradient-flare/flares/Hidden_Planet b/plug-ins/gradient-flare/flares/Hidden_Planet
new file mode 100644
index 0000000..ee5ec6a
--- /dev/null
+++ b/plug-ins/gradient-flare/flares/Hidden_Planet
@@ -0,0 +1,18 @@
+GIMP GFlare 0.25
+100.000000 NORMAL
+100.000000 NORMAL
+100.000000 NORMAL
+Flare\040Glow\040Radial\0402
+Flare\040Glow\040Angular\0401
+%white
+100.000000 0.000000 0.000000
+Flare\040Rays\040Radial\0402
+%white
+%white
+50.000000 90.000000 0.000000
+2 85.000000
+%white
+%white
+%white
+0.000000 0.000000 0.000000
+CIRCLE 6 1
diff --git a/plug-ins/gradient-flare/flares/Makefile.am b/plug-ins/gradient-flare/flares/Makefile.am
new file mode 100644
index 0000000..930cf1f
--- /dev/null
+++ b/plug-ins/gradient-flare/flares/Makefile.am
@@ -0,0 +1,14 @@
+## Process this file with automake to produce Makefile.in
+
+flaredir = $(gimpdatadir)/gflare
+
+flare_DATA = \
+	Bright_Star		\
+	Classic			\
+	Distant_Sun		\
+	Default			\
+	GFlare_101		\
+	GFlare_102		\
+	Hidden_Planet
+
+EXTRA_DIST = $(flare_DATA)
diff --git a/plug-ins/gradient-flare/flares/Makefile.in b/plug-ins/gradient-flare/flares/Makefile.in
new file mode 100644
index 0000000..3f6f01a
--- /dev/null
+++ b/plug-ins/gradient-flare/flares/Makefile.in
@@ -0,0 +1,810 @@
+# Makefile.in generated by automake 1.16.2 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994-2020 Free Software Foundation, Inc.
+
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+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
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+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu plug-ins/gradient-flare/flares/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu plug-ins/gradient-flare/flares/Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__maybe_remake_depfiles);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+install-flareDATA: $(flare_DATA)
+	@$(NORMAL_INSTALL)
+	@list='$(flare_DATA)'; test -n "$(flaredir)" || list=; \
+	if test -n "$$list"; then \
+	  echo " $(MKDIR_P) '$(DESTDIR)$(flaredir)'"; \
+	  $(MKDIR_P) "$(DESTDIR)$(flaredir)" || exit 1; \
+	fi; \
+	for p in $$list; do \
+	  if test -f "$$p"; then d=; else d="$(srcdir)/"; fi; \
+	  echo "$$d$$p"; \
+	done | $(am__base_list) | \
+	while read files; do \
+	  echo " $(INSTALL_DATA) $$files '$(DESTDIR)$(flaredir)'"; \
+	  $(INSTALL_DATA) $$files "$(DESTDIR)$(flaredir)" || exit $$?; \
+	done
+
+uninstall-flareDATA:
+	@$(NORMAL_UNINSTALL)
+	@list='$(flare_DATA)'; test -n "$(flaredir)" || list=; \
+	files=`for p in $$list; do echo $$p; done | sed -e 's|^.*/||'`; \
+	dir='$(DESTDIR)$(flaredir)'; $(am__uninstall_files_from_dir)
+tags TAGS:
+
+ctags CTAGS:
+
+cscope cscopelist:
+
+
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(DATA)
+installdirs:
+	for dir in "$(DESTDIR)$(flaredir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool mostlyclean-am
+
+distclean: distclean-am
+	-rm -f Makefile
+distclean-am: clean-am distclean-generic
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am: install-flareDATA
+
+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 Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-generic mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-flareDATA
+
+.MAKE: install-am install-strip
+
+.PHONY: all all-am check check-am clean clean-generic clean-libtool \
+	cscopelist-am ctags-am distclean distclean-generic \
+	distclean-libtool 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-flareDATA \
+	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-generic mostlyclean-libtool pdf pdf-am \
+	ps ps-am tags-am uninstall uninstall-am uninstall-flareDATA
+
+.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/plug-ins/gradient-flare/gradient-flare.c b/plug-ins/gradient-flare/gradient-flare.c
new file mode 100644
index 0000000..731d76e
--- /dev/null
+++ b/plug-ins/gradient-flare/gradient-flare.c
@@ -0,0 +1,5123 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * GFlare plug-in -- lense flare effect by using custom gradients
+ * Copyright (C) 1997 Eiichi Takamori <taka@ma1.sekyou.ne.jp>
+ *
+ * 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/>.
+ *
+ *
+ * A fair proportion of this code was taken from GIMP & Script-fu
+ * copyrighted by Spencer Kimball and Peter Mattis, and from Gradient
+ * Editor copyrighted by Federico Mena Quintero. (See copyright notice
+ * below) Thanks for senior GIMP hackers!!
+ *
+ * GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * Gradient editor module copyight (C) 1996-1997 Federico Mena Quintero
+ * federico@nuclecu.unam.mx
+ */
+
+#include "config.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <glib/gstdio.h>
+
+#include <glib-object.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "libgimp/stdplugins-intl.h"
+
+/* #define DEBUG */
+
+#ifdef DEBUG
+#define DEBUG_PRINT(X) g_print X
+#else
+#define DEBUG_PRINT(X)
+#endif
+
+#define LUMINOSITY(PIX) (GIMP_RGB_LUMINANCE (PIX[0], PIX[1], PIX[2]) + 0.5)
+
+#define RESPONSE_RESCAN     1
+
+#define PLUG_IN_PROC        "plug-in-gflare"
+#define PLUG_IN_BINARY      "gradient-flare"
+#define PLUG_IN_ROLE        "gimp-gradient-flare"
+
+#define GRADIENT_NAME_MAX   256
+#define GRADIENT_RESOLUTION 360
+
+#define GFLARE_NAME_MAX     256
+#define GFLARE_FILE_HEADER  "GIMP GFlare 0.25\n"
+#define SFLARE_NUM           30
+
+#define DLG_PREVIEW_WIDTH   256
+#define DLG_PREVIEW_HEIGHT  256
+#define DLG_PREVIEW_MASK    GDK_EXPOSURE_MASK | \
+                            GDK_BUTTON_PRESS_MASK
+#define DLG_LISTBOX_WIDTH   80
+#define DLG_LISTBOX_HEIGHT  40
+
+#define ED_PREVIEW_WIDTH    256
+#define ED_PREVIEW_HEIGHT   256
+
+#define GM_PREVIEW_WIDTH    80
+#define GM_PREVIEW_HEIGHT   16
+
+#define SCALE_WIDTH         80
+
+#ifndef OPAQUE
+#define OPAQUE              255
+#endif
+#define GRAY50              128
+
+#define GRADIENT_CACHE_SIZE 32
+
+#define CALC_GLOW   0x01
+#define CALC_RAYS   0x02
+#define CALC_SFLARE 0x04
+
+typedef struct _Preview Preview;
+
+typedef gchar   GradientName[GRADIENT_NAME_MAX];
+
+typedef enum
+{
+  GF_NORMAL = 0,
+  GF_ADDITION,
+  GF_OVERLAY,
+  GF_SCREEN,
+  GF_NUM_MODES
+} GFlareMode;
+
+typedef enum
+{
+  GF_CIRCLE = 0,
+  GF_POLYGON,
+  GF_NUM_SHAPES
+} GFlareShape;
+
+typedef struct
+{
+  gchar        *name;
+  gchar        *filename;
+  gdouble       glow_opacity;
+  GFlareMode    glow_mode;
+  gdouble       rays_opacity;
+  GFlareMode    rays_mode;
+  gdouble       sflare_opacity;
+  GFlareMode    sflare_mode;
+  GradientName  glow_radial;
+  GradientName  glow_angular;
+  GradientName  glow_angular_size;
+  gdouble       glow_size;
+  gdouble       glow_rotation;
+  gdouble       glow_hue;
+  GradientName  rays_radial;
+  GradientName  rays_angular;
+  GradientName  rays_angular_size;
+  gdouble       rays_size;
+  gdouble       rays_rotation;
+  gdouble       rays_hue;
+  gint          rays_nspikes;
+  gdouble       rays_thickness;
+  GradientName  sflare_radial;
+  GradientName  sflare_sizefac;
+  GradientName  sflare_probability;
+  gdouble       sflare_size;
+  gdouble       sflare_rotation;
+  gdouble       sflare_hue;
+  GFlareShape   sflare_shape;
+  gint          sflare_nverts;
+  guint32       sflare_seed;
+  gboolean      random_seed;
+} GFlare;
+
+typedef struct
+{
+  FILE *fp;
+  gint  error;
+} GFlareFile;
+
+
+typedef enum
+{
+  PAGE_SETTINGS,
+  PAGE_SELECTOR,
+  PAGE_GENERAL,
+  PAGE_GLOW,
+  PAGE_RAYS,
+  PAGE_SFLARE
+} PageNum;
+
+
+typedef struct
+{
+  gint       init;
+  GFlare    *gflare;
+  GtkWidget *shell;
+  Preview   *preview;
+  struct
+  {
+    gdouble x0, y0, x1, y1;
+  } pwin;
+  gboolean          update_preview;
+  GtkWidget        *notebook;
+  GtkWidget        *sizeentry;
+  GtkWidget        *asupsample_frame;
+  GtkListStore     *selector_list;
+  GtkTreeSelection *selection;
+  gint              init_params_done;
+} GFlareDialog;
+
+typedef void (* GFlareEditorCallback) (gint updated, gpointer data);
+
+typedef struct
+{
+  gint                  init;
+  gint                  run;
+  GFlareEditorCallback  callback;
+  gpointer              calldata;
+  GFlare               *target_gflare;
+  GFlare               *gflare;
+  GtkWidget            *shell;
+  Preview              *preview;
+  GtkWidget            *notebook;
+  PageNum               cur_page;
+  GtkWidget            *polygon_entry;
+  GtkWidget            *polygon_toggle;
+  gint                  init_params_done;
+} GFlareEditor;
+
+typedef struct
+{
+  gdouble x0;
+  gdouble y0;
+  gdouble x1;
+  gdouble y1;
+} CalcBounds;
+
+typedef struct
+{
+  gint     init;
+  gint     type;
+  GFlare  *gflare;
+  gdouble  xcenter;
+  gdouble  ycenter;
+  gdouble  radius;
+  gdouble  rotation;
+  gdouble  hue;
+  gdouble  vangle;
+  gdouble  vlength;
+
+  gint        glow_opacity;
+  CalcBounds  glow_bounds;
+  guchar     *glow_radial;
+  guchar     *glow_angular;
+  guchar     *glow_angular_size;
+  gdouble     glow_radius;
+  gdouble     glow_rotation;
+
+  gint        rays_opacity;
+  CalcBounds  rays_bounds;
+  guchar     *rays_radial;
+  guchar     *rays_angular;
+  guchar     *rays_angular_size;
+  gdouble     rays_radius;
+  gdouble     rays_rotation;
+  gdouble     rays_spike_mod;
+  gdouble     rays_thinness;
+
+  gint         sflare_opacity;
+  GList       *sflare_list;
+  guchar      *sflare_radial;
+  guchar      *sflare_sizefac;
+  guchar      *sflare_probability;
+  gdouble      sflare_radius;
+  gdouble      sflare_rotation;
+  GFlareShape  sflare_shape;
+  gdouble      sflare_angle;
+  gdouble      sflare_factor;
+} CalcParams;
+
+/*
+ * What's the difference between (structure) CalcParams and GFlare ?
+ * well, radius and lengths are actual length for CalcParams where
+ * they are typically 0 to 100 for GFlares, and angles are G_PI based
+ * (radian) for CalcParams where they are degree for GFlares. et cetra.
+ * This is because convenience for dialog processing and for calculating.
+ * these conversion is taken place in calc init routines. see below.
+ */
+
+typedef struct
+{
+  gdouble    xcenter;
+  gdouble    ycenter;
+  gdouble    radius;
+  CalcBounds bounds;
+} CalcSFlare;
+
+typedef struct
+{
+  const Babl *format;
+  gint        bpp;
+  gint        is_color;
+  gint        has_alpha;
+  gint        x, y, w, h; /* mask bounds */
+} DrawableInfo;
+
+typedef struct _GradientMenu GradientMenu;
+typedef void (* GradientMenuCallback) (const gchar *gradient_name,
+                                       gpointer     data);
+struct _GradientMenu
+{
+  GtkWidget            *preview;
+  GtkWidget            *combo;
+  GradientMenuCallback  callback;
+  gpointer              callback_data;
+  GradientName          gradient_name;
+};
+
+typedef gint (* PreviewInitFunc)   (Preview  *preview,
+                                    gpointer  data);
+typedef void (* PreviewRenderFunc) (Preview  *preview,
+                                    guchar   *buffer,
+                                    gint      y,
+                                    gpointer  data);
+typedef void (* PreviewDeinitFunc) (Preview  *preview,
+                                    gpointer  data);
+
+struct _Preview
+{
+  GtkWidget         *widget;
+  gint               width;
+  gint               height;
+  PreviewInitFunc    init_func;
+  gpointer           init_data;
+  PreviewRenderFunc  render_func;
+  gpointer           render_data;
+  PreviewDeinitFunc  deinit_func;
+  gpointer           deinit_data;
+  guint              timeout_tag;
+  guint              idle_tag;
+  gint               init_done;
+  gint               current_y;
+  gint               drawn_y;
+  guchar            *buffer;
+  guchar            *full_image_buffer;
+};
+
+typedef struct
+{
+  gint               tag;
+  gint               got_gradients;
+  gint               current_y;
+  gint               drawn_y;
+  PreviewRenderFunc  render_func;
+  guchar            *buffer;
+} PreviewIdle;
+
+typedef struct _GradientCacheItem  GradientCacheItem;
+
+struct _GradientCacheItem
+{
+  GradientCacheItem *next;
+  GradientCacheItem *prev;
+  GradientName       name;
+  guchar             values[4 * GRADIENT_RESOLUTION];
+};
+
+typedef struct
+{
+  gint     xcenter;
+  gint     ycenter;
+  gdouble  radius;
+  gdouble  rotation;
+  gdouble  hue;
+  gdouble  vangle;
+  gdouble  vlength;
+  gint     use_asupsample;
+  gint     asupsample_max_depth;
+  gdouble  asupsample_threshold;
+  gchar    gflare_name[GFLARE_NAME_MAX];
+} PluginValues;
+
+
+typedef void (* QueryFunc) (GtkWidget *,
+                            gpointer,
+                            gpointer);
+
+/***
+ ***  Global Functions Prototypes
+ **/
+
+static void    plugin_query (void);
+static void    plugin_run   (const gchar      *name,
+                             gint              nparams,
+                             const GimpParam  *param,
+                             gint             *nreturn_vals,
+                             GimpParam       **return_vals);
+
+static GFlare * gflare_new_with_default (const gchar *new_name);
+static GFlare * gflare_dup              (const GFlare      *src,
+                                         const gchar *new_name);
+static void     gflare_copy             (GFlare      *dest,
+                                         const GFlare      *src);
+static GFlare * gflare_load             (const gchar *filename,
+                                         const gchar *name);
+static void     gflare_save             (GFlare      *gflare);
+static void     gflare_name_copy        (gchar       *dest,
+                                         const gchar *src);
+
+static gint     gflares_list_insert     (GFlare      *gflare);
+static GFlare * gflares_list_lookup     (const gchar *name);
+static gint     gflares_list_index      (GFlare      *gflare);
+static gint     gflares_list_remove     (GFlare      *gflare);
+static void     gflares_list_load_all   (void);
+static void     gflares_list_free_all   (void);
+
+static void     calc_init_params   (GFlare  *gflare,
+                                    gint     calc_type,
+                                    gdouble  xcenter,
+                                    gdouble  ycenter,
+                                    gdouble  radius,
+                                    gdouble  rotation,
+                                    gdouble  hue,
+                                    gdouble  vangle,
+                                    gdouble  vlength);
+static gint     calc_init_progress (void);
+static void     calc_deinit        (void);
+static void     calc_glow_pix      (guchar  *dest_pix,
+                                    gdouble  x,
+                                    gdouble  y);
+static void     calc_rays_pix      (guchar  *dest_pix,
+                                    gdouble  x,
+                                    gdouble  y);
+static void     calc_sflare_pix    (guchar  *dest_pix,
+                                    gdouble  x,
+                                    gdouble  y,
+                                    guchar  *src_pix);
+static void     calc_gflare_pix    (guchar  *dest_pix,
+                                    gdouble  x,
+                                    gdouble  y,
+                                    guchar  *src_pix);
+
+static gboolean    dlg_run                 (void);
+static void        dlg_preview_calc_window (void);
+static void        ed_preview_calc_window  (void);
+static GtkWidget * ed_mode_menu_new        (GFlareMode *mode_var);
+
+static Preview   * preview_new          (gint               width,
+                                         gint               height,
+                                         PreviewInitFunc    init_func,
+                                         gpointer           init_data,
+                                         PreviewRenderFunc  render_func,
+                                         gpointer           render_data,
+                                         PreviewDeinitFunc  deinit_func,
+                                         gpointer           deinit_data);
+static void        preview_free         (Preview           *preview);
+static void        preview_render_start (Preview           *preview);
+static void        preview_render_end   (Preview           *preview);
+static void        preview_rgba_to_rgb  (guchar            *dest,
+                                         gint               x,
+                                         gint               y,
+                                         guchar            *src);
+
+static void             gradient_menu_init    (void);
+static void             gradient_menu_rescan  (void);
+static GradientMenu   * gradient_menu_new     (GradientMenuCallback callback,
+                                               gpointer        callback_data,
+                                               const gchar    *default_gradient_name);
+static void             gradient_name_copy    (gchar       *dest,
+                                               const gchar *src);
+static void             gradient_name_encode  (gchar       *dest,
+                                               const gchar *src);
+static void             gradient_name_decode  (gchar       *dest,
+                                               const gchar *src);
+static void             gradient_init         (void);
+static void             gradient_free         (void);
+static gchar         ** gradient_get_list     (gint   *num_gradients);
+static void             gradient_get_values   (const gchar *gradient_name,
+                                               guchar      *values,
+                                               gint         nvalues);
+static void             gradient_cache_flush  (void);
+
+/* *** INSERT-FILE-END *** */
+
+/**
+***     Variables
+**/
+
+const GimpPlugInInfo PLUG_IN_INFO =
+{
+  NULL,         /* init_proc  */
+  NULL,         /* quit_proc  */
+  plugin_query, /* query_proc */
+  plugin_run,   /* run_proc   */
+};
+
+PluginValues pvals =
+{
+  128,          /* xcenter */
+  128,          /* ycenter */
+  100.0,        /* radius */
+  0.0,          /* rotation */
+  0.0,          /* hue */
+  60.0,         /* vangle */
+  400.0,        /* vlength */
+  FALSE,        /* use_asupsample */
+  3,            /* asupsample_max_depth */
+  0.2,          /* asupsample_threshold */
+  "Default"     /* gflare_name */
+};
+
+GFlare default_gflare =
+{
+  NULL,         /* name */
+  NULL,         /* filename */
+  100,          /* glow_opacity */
+  GF_NORMAL,    /* glow_mode */
+  100,          /* rays_opacity */
+  GF_NORMAL,    /* rays_mode */
+  100,          /* sflare_opacity */
+  GF_NORMAL,    /* sflare_mode */
+  "%red_grad",  /* glow_radial */
+  "%white",     /* glow_angular */
+  "%white",     /* glow_angular_size */
+  100.0,        /* glow_size */
+  0.0,          /* glow_rotation */
+  0.0,          /* glow_hue */
+  "%white_grad",/* rays_radial */
+  "%random",    /* rays_angular */
+  "%random",    /* rays_angular_size */
+  100.0,        /* rays_size */
+  0.0,          /* rays_rotation */
+  0.0,          /* rays_hue */
+  40,           /* rays_nspikes */
+  20.0,         /* rays_thickness */
+  "%white_grad",/* sflare_radial */
+  "%random",    /* sflare_sizefac */
+  "%random",    /* sflare_probability */
+  40.0,         /* sflare_size */
+  0.0,          /* sflare_rotation */
+  0.0,          /* sflare_hue */
+  GF_CIRCLE,    /* sflare_shape */
+  6,            /* sflare_nverts */
+  0,            /* sflare_seed */
+  TRUE,         /* random_seed */
+};
+
+/* These are keywords to be written to disk files specifying flares. */
+/* They are not translated since we want gflare files to be compatible
+   across languages. */
+static const gchar *gflare_modes[] =
+{
+  "NORMAL",
+  "ADDITION",
+  "OVERLAY",
+  "SCREEN"
+};
+
+static const gchar *gflare_shapes[] =
+{
+  "CIRCLE",
+  "POLYGON"
+};
+
+/* These are for menu entries, so they are translated. */
+static const gchar *gflare_menu_modes[] =
+{
+  N_("Normal"),
+  N_("Addition"),
+  N_("Overlay"),
+  N_("Screen")
+};
+
+static gint32              image_ID;
+static gint32              drawable_ID;
+static DrawableInfo        dinfo;
+static GFlareDialog       *dlg = NULL;
+static GFlareEditor       *ed = NULL;
+static GList              *gflares_list = NULL;
+static gint                num_gflares  = 0;
+static gchar              *gflare_path  = NULL;
+static CalcParams          calc;
+static GList              *gradient_menus;
+static gchar             **gradient_names = NULL;
+static gint                num_gradient_names = 0;
+static GradientCacheItem  *gradient_cache_head  = NULL;
+static gint                gradient_cache_count = 0;
+
+
+static const gchar *internal_gradients[] =
+{
+  "%white", "%white_grad", "%red_grad", "%blue_grad", "%yellow_grad", "%random"
+};
+
+#ifdef DEBUG
+static gint     get_values_external_count = 0;
+static clock_t  get_values_external_clock = 0;
+#endif
+
+
+/**
+***     +++ Static Functions Prototypes
+**/
+
+static void plugin_do                   (void);
+
+static void plugin_do_non_asupsample    (GeglBuffer   *src_buffer,
+                                         GeglBuffer   *dest_buffer);
+static void plugin_do_asupsample        (GeglBuffer   *src_buffer,
+                                         GeglBuffer   *dest_buffer);
+static void plugin_render_func          (gdouble       x,
+                                         gdouble       y,
+                                         GimpRGB      *color,
+                                         gpointer      data);
+static void plugin_put_pixel_func       (gint          ix,
+                                         gint          iy,
+                                         GimpRGB      *color,
+                                         gpointer      data);
+static void plugin_progress_func        (gint          y1,
+                                         gint          y2,
+                                         gint          curr_y,
+                                         gpointer      data);
+
+static GFlare * gflare_new              (void);
+static void gflare_free                 (GFlare       *gflare);
+static void gflare_read_int             (gint         *intvar,
+                                         GFlareFile   *gf);
+static void gflare_read_double          (gdouble      *dblvar,
+                                         GFlareFile   *gf);
+static void gflare_read_gradient_name   (gchar        *name,
+                                         GFlareFile   *gf);
+static void gflare_read_shape           (GFlareShape  *shape,
+                                         GFlareFile   *gf);
+static void gflare_read_mode            (GFlareMode   *mode,
+                                         GFlareFile   *gf);
+static void gflare_write_gradient_name  (gchar        *name,
+                                         FILE         *fp);
+
+static gint calc_sample_one_gradient    (void);
+static void calc_place_sflare           (void);
+static void calc_get_gradient           (guchar       *pix,
+                                         guchar       *gradient,
+                                         gdouble       pos);
+static gdouble fmod_positive            (gdouble       x,
+                                         gdouble       m);
+static void calc_paint_func             (guchar       *dest,
+                                         guchar       *src1,
+                                         guchar       *src2,
+                                         gint          opacity,
+                                         GFlareMode    mode);
+static void calc_combine                (guchar       *dest,
+                                         guchar       *src1,
+                                         guchar       *src2,
+                                         gint          opacity);
+static void calc_addition               (guchar       *dest,
+                                         guchar       *src1,
+                                         guchar       *src2);
+static void calc_screen                 (guchar       *dest,
+                                         guchar       *src1,
+                                         guchar       *src2);
+static void calc_overlay                (guchar       *dest,
+                                         guchar       *src1,
+                                         guchar       *src2);
+
+static void dlg_setup_gflare            (void);
+static void dlg_preview_realize         (GtkWidget    *widget);
+static gboolean dlg_preview_handle_event (GtkWidget    *widget,
+                                          GdkEvent     *event);
+static void dlg_preview_update          (void);
+static gint dlg_preview_init_func       (Preview      *preview,
+                                         gpointer      data);
+static void dlg_preview_render_func     (Preview      *preview,
+                                         guchar       *dest,
+                                         gint          y,
+                                         gpointer      data);
+static void dlg_preview_deinit_func     (Preview      *preview,
+                                         gpointer      data);
+static void dlg_make_page_settings      (GFlareDialog *dlg,
+                                         GtkWidget    *notebook);
+static void dlg_position_entry_callback (GtkWidget    *widget,
+                                         gpointer      data);
+static void dlg_update_preview_callback (GtkWidget    *widget,
+                                         gpointer      data);
+static void dlg_make_page_selector      (GFlareDialog *dlg,
+                                         GtkWidget    *notebook);
+
+static void dlg_selector_setup_listbox      (void);
+static void dlg_selector_list_item_callback (GtkTreeSelection *selection);
+
+static void dlg_selector_new_callback       (GtkWidget   *widget,
+                                             gpointer     data);
+static void dlg_selector_new_ok_callback    (GtkWidget   *widget,
+                                             const gchar *new_name,
+                                             gpointer     data);
+
+static void dlg_selector_edit_callback      (GtkWidget   *widget,
+                                             gpointer     data);
+static void dlg_selector_edit_done_callback (gint         updated,
+                                             gpointer     data);
+
+static void dlg_selector_copy_callback      (GtkWidget   *widget,
+                                             gpointer    data);
+static void dlg_selector_copy_ok_callback   (GtkWidget   *widget,
+                                             const gchar *copy_name,
+                                             gpointer     data);
+
+static void dlg_selector_delete_callback    (GtkWidget   *widget,
+                                             gpointer     data);
+static void dlg_selector_do_delete_callback (GtkWidget   *widget,
+                                             gboolean     delete,
+                                             gpointer     data);
+
+static void ed_run                (GtkWindow            *parent,
+                                   GFlare               *target_gflare,
+                                   GFlareEditorCallback  callback,
+                                   gpointer              calldata);
+static void ed_destroy_callback   (GtkWidget    *widget,
+                                   GFlareEditor *ed);
+static void ed_response           (GtkWidget    *widget,
+                                   gint          response_id,
+                                   GFlareEditor *ed);
+static void ed_make_page_general  (GFlareEditor *ed,
+                                   GtkWidget    *notebook);
+static void ed_make_page_glow     (GFlareEditor *ed,
+                                   GtkWidget    *notebook);
+static void ed_make_page_rays     (GFlareEditor *ed,
+                                   GtkWidget    *notebook);
+static void ed_make_page_sflare   (GFlareEditor *ed,
+                                   GtkWidget    *notebook);
+static void ed_put_gradient_menu  (GtkWidget    *table,
+                                   gint          x,
+                                   gint          y,
+                                   const gchar  *caption,
+                                   GradientMenu *gm);
+static void ed_mode_menu_callback (GtkWidget    *widget,
+                                   gpointer      data);
+static void ed_gradient_menu_callback (const gchar *gradient_name,
+                                       gpointer     data);
+static void ed_shape_radio_callback   (GtkWidget *widget, gpointer data);
+static void ed_ientry_callback        (GtkWidget *widget, gpointer data);
+static void ed_page_map_callback      (GtkWidget *widget, gpointer data);
+static void ed_preview_update         (void);
+static gint ed_preview_init_func      (Preview *preview, gpointer data);
+static void ed_preview_deinit_func    (Preview *preview, gpointer data);
+static void ed_preview_render_func    (Preview *preview,
+                                       guchar *buffer, gint y, gpointer data);
+static void ed_preview_render_general (guchar *buffer, gint y);
+static void ed_preview_render_glow    (guchar *buffer, gint y);
+static void ed_preview_render_rays    (guchar *buffer, gint y);
+static void ed_preview_render_sflare  (guchar *buffer, gint y);
+
+static gint preview_render_start_2    (Preview *preview);
+static gint preview_handle_idle       (Preview *preview);
+
+static void gm_gradient_get_list            (void);
+static void gm_gradient_combo_fill          (GradientMenu *gm,
+                                             const gchar  *default_gradient);
+static void gm_gradient_combo_callback      (GtkWidget    *widget,
+                                             gpointer      data);
+static void gm_preview_draw                 (GtkWidget    *preview,
+                                             const gchar  *gradient_name);
+static void gm_combo_destroy_callback       (GtkWidget    *widget,
+                                             gpointer      data);
+
+static void gradient_get_values_internal    (const gchar *gradient_name,
+                                             guchar *values, gint nvalues);
+static void gradient_get_blend              (const guchar *fg,
+                                             const guchar *bg,
+                                             guchar *values, gint nvalues);
+static void gradient_get_random             (guchar *values, gint nvalues);
+static void gradient_get_default            (const gchar *name,
+                                             guchar *values, gint nvalues);
+static void gradient_get_values_external    (const gchar *gradient_name,
+                                             guchar *values, gint nvalues);
+static void gradient_get_values_real_external   (const gchar *gradient_name,
+                                                 guchar   *values,
+                                                 gint      nvalues,
+                                                 gboolean  reverse);
+static GradientCacheItem *gradient_cache_lookup (const gchar *name,
+                                                 gboolean    *found);
+static void gradient_cache_zorch                (void);
+
+/* *** INSERT-FILE-END *** */
+
+
+/*************************************************************************/
+/**                                                                     **/
+/**             +++ Plug-in Interfaces                                  **/
+/**                                                                     **/
+/*************************************************************************/
+
+MAIN ()
+
+void
+plugin_query (void)
+{
+  static const GimpParamDef args[]=
+  {
+    { GIMP_PDB_INT32,    "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
+    { GIMP_PDB_IMAGE,    "image",    "Input image (unused)" },
+    { GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
+    { GIMP_PDB_STRING,   "gflare-name", "The name of GFlare" },
+    { GIMP_PDB_INT32,    "xcenter",  "X coordinate of center of GFlare" },
+    { GIMP_PDB_INT32,    "ycenter",  "Y coordinate of center of GFlare" },
+    { GIMP_PDB_FLOAT,    "radius",   "Radius of GFlare (pixel)" },
+    { GIMP_PDB_FLOAT,    "rotation", "Rotation of GFlare (degree)" },
+    { GIMP_PDB_FLOAT,    "hue",      "Hue rotation of GFlare (degree)" },
+    { GIMP_PDB_FLOAT,    "vangle",   "Vector angle for second flares (degree)" },
+    { GIMP_PDB_FLOAT,    "vlength",  "Vector length for second flares (percentage to Radius)" },
+    { GIMP_PDB_INT32,    "use-asupsample", "Whether it uses or not adaptive supersampling while rendering (boolean)" },
+    { GIMP_PDB_INT32,    "asupsample-max-depth", "Max depth for adaptive supersampling"},
+    { GIMP_PDB_FLOAT,    "asupsample-threshold", "Threshold for adaptive supersampling"}
+  };
+
+  const gchar *help_string =
+    "This plug-in produces a lense flare effect using custom gradients. "
+    "In interactive call, the user can edit his/her own favorite lense flare "
+    "(GFlare) and render it. Edited gflare is saved automatically to "
+    "the folder in gflare-path, if it is defined in gimprc. "
+    "In non-interactive call, the user can only render one of GFlare "
+    "which has been stored in gflare-path already.";
+
+  gimp_install_procedure (PLUG_IN_PROC,
+                          N_("Produce a lense flare effect using gradients"),
+                          help_string,
+                          "Eiichi Takamori",
+                          "Eiichi Takamori, and a lot of GIMP people",
+                          "1997",
+                          N_("_Gradient Flare..."),
+                          "RGB*, GRAY*",
+                          GIMP_PLUGIN,
+                          G_N_ELEMENTS (args), 0,
+                          args, NULL);
+
+  gimp_plugin_menu_register (PLUG_IN_PROC,
+                             "<Image>/Filters/Light and Shadow/Light");
+}
+
+void
+plugin_run (const gchar      *name,
+            gint              nparams,
+            const GimpParam  *param,
+            gint             *nreturn_vals,
+            GimpParam       **return_vals)
+{
+  static GimpParam   values[2];
+  GimpRunMode        run_mode;
+  GimpPDBStatusType  status = GIMP_PDB_SUCCESS;
+  gchar             *path;
+
+  INIT_I18N ();
+  gegl_init (NULL, NULL);
+
+  *nreturn_vals = 1;
+  *return_vals = values;
+
+  values[0].type = GIMP_PDB_STATUS;
+  values[0].data.d_status = status;
+
+  run_mode    = param[0].data.d_int32;
+  image_ID    = param[1].data.d_image;
+  drawable_ID = param[2].data.d_drawable;
+
+  dinfo.is_color  = gimp_drawable_is_rgb (drawable_ID);
+  dinfo.has_alpha = gimp_drawable_has_alpha (drawable_ID);
+
+  if (dinfo.is_color)
+    {
+      if (dinfo.has_alpha)
+        dinfo.format = babl_format ("R'G'B'A u8");
+      else
+        dinfo.format = babl_format ("R'G'B' u8");
+    }
+  else
+    {
+      if (dinfo.has_alpha)
+        dinfo.format = babl_format ("Y'A u8");
+      else
+        dinfo.format = babl_format ("Y u8");
+    }
+
+  dinfo.bpp = babl_format_get_bytes_per_pixel (dinfo.format);
+
+  if (! gimp_drawable_mask_intersect (drawable_ID,
+                                      &dinfo.x, &dinfo.y, &dinfo.w, &dinfo.h))
+    return;
+
+  /*
+   *    Start gradient caching
+   */
+
+  gradient_init ();
+
+  /*
+   *    Parse gflare path from gimprc and load gflares
+   */
+
+  path = gimp_gimprc_query ("gflare-path");
+  if (path)
+    {
+      gflare_path = g_filename_from_utf8 (path, -1, NULL, NULL, NULL);
+      g_free (path);
+    }
+  else
+    {
+      gchar *gimprc    = gimp_personal_rc_file ("gimprc");
+      gchar *full_path = gimp_config_build_data_path ("gflare");
+      gchar *esc_path  = g_strescape (full_path, NULL);
+      g_free (full_path);
+
+      g_message (_("No %s in gimprc:\n"
+                   "You need to add an entry like\n"
+                   "(%s \"%s\")\n"
+                   "to your %s file."),
+                 "gflare-path", "gflare-path",
+                 esc_path, gimp_filename_to_utf8 (gimprc));
+
+      g_free (gimprc);
+      g_free (esc_path);
+    }
+
+  gflares_list_load_all ();
+
+  switch (run_mode)
+    {
+    case GIMP_RUN_INTERACTIVE:
+
+      /*  Possibly retrieve data  */
+      gimp_get_data (PLUG_IN_PROC, &pvals);
+
+      /*  First acquire information with a dialog  */
+      if (! dlg_run ())
+        return;
+      break;
+
+    case GIMP_RUN_NONINTERACTIVE:
+      if (nparams != 14)
+        {
+          status = GIMP_PDB_CALLING_ERROR;
+        }
+      else
+        {
+          gflare_name_copy (pvals.gflare_name, param[3].data.d_string);
+          pvals.xcenter              = param[4].data.d_int32;
+          pvals.ycenter              = param[5].data.d_int32;
+          pvals.radius               = param[6].data.d_float;
+          pvals.rotation             = param[7].data.d_float;
+          pvals.hue                  = param[8].data.d_float;
+          pvals.vangle               = param[9].data.d_float;
+          pvals.vlength              = param[10].data.d_float;
+          pvals.use_asupsample       = param[11].data.d_int32;
+          pvals.asupsample_max_depth = param[12].data.d_int32;
+          pvals.asupsample_threshold = param[13].data.d_float;
+
+          if (pvals.radius <= 0)
+            status = GIMP_PDB_CALLING_ERROR;
+        }
+      break;
+
+    case GIMP_RUN_WITH_LAST_VALS:
+      /*  Possibly retrieve data  */
+      gimp_get_data (PLUG_IN_PROC, &pvals);
+      break;
+
+    default:
+      break;
+    }
+
+  if (status == GIMP_PDB_SUCCESS)
+    {
+      /*  Make sure that the drawable is gray or RGB color  */
+      if (gimp_drawable_is_rgb (drawable_ID) ||
+          gimp_drawable_is_gray (drawable_ID))
+        {
+          gimp_progress_init (_("Gradient Flare"));
+          plugin_do ();
+
+          if (run_mode != GIMP_RUN_NONINTERACTIVE)
+            gimp_displays_flush ();
+
+          /*  Store data  */
+          if (run_mode == GIMP_RUN_INTERACTIVE)
+            gimp_set_data (PLUG_IN_PROC, &pvals, sizeof (PluginValues));
+        }
+      else
+        {
+          status        = GIMP_PDB_EXECUTION_ERROR;
+          *nreturn_vals = 2;
+          values[1].type          = GIMP_PDB_STRING;
+          values[1].data.d_string = _("Cannot operate on indexed color images.");
+        }
+    }
+
+  values[0].data.d_status = status;
+
+  /*
+   *    Deinitialization
+   */
+  gradient_free ();
+}
+
+static void
+plugin_do (void)
+{
+  GeglBuffer *src_buffer;
+  GeglBuffer *dest_buffer;
+  GFlare     *gflare;
+
+  gflare = gflares_list_lookup (pvals.gflare_name);
+  if (gflare == NULL)
+    {
+      /* FIXME */
+      g_warning ("Not found %s\n", pvals.gflare_name);
+      return;
+    }
+
+  /* Initialize calc params and gradients */
+  calc_init_params (gflare, CALC_GLOW | CALC_RAYS | CALC_SFLARE,
+                    pvals.xcenter, pvals.ycenter,
+                    pvals.radius, pvals.rotation, pvals.hue,
+                    pvals.vangle, pvals.vlength);
+  while (calc_init_progress ()) ;
+
+  src_buffer  = gimp_drawable_get_buffer (drawable_ID);
+  dest_buffer = gimp_drawable_get_shadow_buffer (drawable_ID);
+
+  /* Render it ! */
+  if (pvals.use_asupsample)
+    plugin_do_asupsample (src_buffer, dest_buffer);
+  else
+    plugin_do_non_asupsample (src_buffer, dest_buffer);
+
+  g_object_unref (src_buffer);
+  g_object_unref (dest_buffer);
+
+  gimp_progress_update (1.0);
+
+  /* Clean up */
+  calc_deinit ();
+
+  gimp_drawable_merge_shadow (drawable_ID, TRUE);
+  gimp_drawable_update (drawable_ID, dinfo.x, dinfo.y, dinfo.w, dinfo.h);
+}
+
+/* these routines should be almost rewritten anyway */
+
+static void
+plugin_do_non_asupsample (GeglBuffer   *src_buffer,
+                          GeglBuffer   *dest_buffer)
+{
+  GeglBufferIterator *iter;
+  gint                progress;
+  gint                max_progress;
+
+  progress = 0;
+  max_progress = dinfo.w * dinfo.h;
+
+  iter = gegl_buffer_iterator_new (src_buffer,
+                                   GEGL_RECTANGLE (dinfo.x, dinfo.y,
+                                                   dinfo.w, dinfo.h), 0,
+                                   dinfo.format,
+                                   GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 2);
+
+  gegl_buffer_iterator_add (iter, dest_buffer,
+                            GEGL_RECTANGLE (dinfo.x, dinfo.y,
+                                            dinfo.w, dinfo.h), 0,
+                            dinfo.format,
+                            GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE);
+
+  while (gegl_buffer_iterator_next (iter))
+    {
+      const guchar *src_row  = iter->items[0].data;
+      guchar       *dest_row = iter->items[1].data;
+      gint          row, y;
+
+      for (row = 0, y = iter->items[0].roi.y;
+           row < iter->items[0].roi.height;
+           row++, y++)
+        {
+          const guchar *src  = src_row;
+          guchar       *dest = dest_row;
+          gint          col, x;
+
+          for (col = 0, x = iter->items[0].roi.x;
+               col < iter->items[0].roi.width;
+               col++, x++)
+            {
+              guchar  src_pix[4];
+              guchar  dest_pix[4];
+              gint    b;
+
+              for (b = 0; b < 3; b++)
+                src_pix[b] = dinfo.is_color ? src[b] : src[0];
+
+              src_pix[3] = dinfo.has_alpha ? src[dinfo.bpp - 1] : OPAQUE;
+
+              calc_gflare_pix (dest_pix, x, y, src_pix);
+
+              if (dinfo.is_color)
+                {
+                  for (b = 0; b < 3; b++)
+                    dest[b] = dest_pix[b];
+                }
+              else
+                {
+                  dest[0] = LUMINOSITY (dest_pix);
+                }
+
+              if (dinfo.has_alpha)
+                dest[dinfo.bpp - 1] = dest_pix[3];
+
+              src  += dinfo.bpp;
+              dest += dinfo.bpp;
+            }
+
+          src_row  += dinfo.bpp * iter->items[0].roi.width;
+          dest_row += dinfo.bpp * iter->items[1].roi.width;
+        }
+
+      /* Update progress */
+      progress += iter->items[0].roi.width * iter->items[0].roi.height;
+      gimp_progress_update ((double) progress / (double) max_progress);
+    }
+}
+
+static void
+plugin_do_asupsample (GeglBuffer   *src_buffer,
+                      GeglBuffer   *dest_buffer)
+{
+  gimp_adaptive_supersample_area (dinfo.x, dinfo.y,
+                                  dinfo.x + dinfo.w - 1, dinfo.y + dinfo.h - 1,
+                                  pvals.asupsample_max_depth,
+                                  pvals.asupsample_threshold,
+                                  plugin_render_func,
+                                  src_buffer,
+                                  plugin_put_pixel_func,
+                                  dest_buffer,
+                                  plugin_progress_func,
+                                  NULL);
+}
+
+/*
+  Adaptive supersampling callback functions
+
+  These routines may look messy, since adaptive supersampling needs
+  pixel values in `double' (from 0.0 to 1.0) but calc_*_pix () returns
+  guchar values. */
+
+static void
+plugin_render_func (gdouble   x,
+                    gdouble   y,
+                    GimpRGB  *color,
+                    gpointer  data)
+{
+  GeglBuffer *src_buffer = data;
+  guchar      src_pix[4];
+  guchar      flare_pix[4];
+  guchar      src[4];
+  gint        b;
+  gint        ix, iy;
+
+  /* translate (0.5, 0.5) before convert to `int' so that it can surely
+     point the center of pixel */
+  ix = floor (x + 0.5);
+  iy = floor (y + 0.5);
+
+  gegl_buffer_sample (src_buffer, ix, iy, NULL, src, dinfo.format,
+                      GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
+
+  for (b = 0; b < 3; b++)
+    src_pix[b] = dinfo.is_color ? src[b] : src[0];
+  src_pix[3] = dinfo.has_alpha ? src[dinfo.bpp - 1] : OPAQUE;
+
+  calc_gflare_pix (flare_pix, x, y, src_pix);
+
+  color->r = flare_pix[0] / 255.0;
+  color->g = flare_pix[1] / 255.0;
+  color->b = flare_pix[2] / 255.0;
+  color->a = flare_pix[3] / 255.0;
+}
+
+static void
+plugin_put_pixel_func (gint      ix,
+                       gint      iy,
+                       GimpRGB  *color,
+                       gpointer  data)
+{
+  GeglBuffer *dest_buffer = data;
+  guchar      dest[4];
+
+  if (dinfo.is_color)
+    {
+      dest[0] = color->r * 255;
+      dest[1] = color->g * 255;
+      dest[2] = color->b * 255;
+    }
+  else
+    {
+      dest[0] = gimp_rgb_luminance_uchar (color);
+    }
+
+  if (dinfo.has_alpha)
+    dest[dinfo.bpp - 1] = color->a * 255;
+
+  gegl_buffer_set (dest_buffer, GEGL_RECTANGLE (ix, iy, 1, 1), 0,
+                   dinfo.format, dest, GEGL_AUTO_ROWSTRIDE);
+}
+
+static void
+plugin_progress_func (gint     y1,
+                      gint     y2,
+                      gint     curr_y,
+                      gpointer data)
+{
+  gimp_progress_update ((double) curr_y / (double) (y2 - y1));
+}
+
+/*************************************************************************/
+/**                                                                     **/
+/**             +++ GFlare Routines                                     **/
+/**                                                                     **/
+/*************************************************************************/
+
+/*
+ *      These code are more or less based on Quartic's gradient.c,
+ *      other gimp sources, and script-fu.
+ */
+
+static GFlare *
+gflare_new (void)
+{
+  GFlare *gflare = g_new0 (GFlare, 1);
+
+  gflare->name     = NULL;
+  gflare->filename = NULL;
+
+  return gflare;
+}
+
+static GFlare *
+gflare_new_with_default (const gchar *new_name)
+{
+  return gflare_dup (&default_gflare, new_name);
+}
+
+static GFlare *
+gflare_dup (const GFlare *src,
+            const gchar  *new_name)
+{
+  GFlare *dest = g_new0 (GFlare, 1);
+
+  *dest = *src;
+
+  dest->name = g_strdup (new_name);
+  dest->filename = NULL;
+
+  return dest;
+}
+
+static void
+gflare_copy (GFlare       *dest,
+             const GFlare *src)
+{
+  gchar *name, *filename;
+
+  name = dest->name;
+  filename = dest->filename;
+
+  *dest = *src;
+
+  dest->name = name;
+  dest->filename =filename;
+}
+
+
+static void
+gflare_free (GFlare *gflare)
+{
+  g_return_if_fail (gflare != NULL);
+
+  g_free (gflare->name);
+  g_free (gflare->filename);
+  g_free (gflare);
+}
+
+GFlare *
+gflare_load (const gchar *filename,
+             const gchar *name)
+{
+  FILE          *fp;
+  GFlareFile    *gf;
+  GFlare        *gflare;
+  gchar         header[256];
+
+  g_return_val_if_fail (filename != NULL, NULL);
+
+  fp = g_fopen (filename, "rb");
+  if (!fp)
+    {
+      g_message (_("Failed to open GFlare file '%s': %s"),
+                  gimp_filename_to_utf8 (filename), g_strerror (errno));
+      return NULL;
+    }
+
+  if (fgets (header, sizeof(header), fp) == NULL
+      || strcmp (header, GFLARE_FILE_HEADER) != 0)
+    {
+      g_warning (_("'%s' is not a valid GFlare file."),
+                  gimp_filename_to_utf8 (filename));
+      fclose (fp);
+      return NULL;
+    }
+
+  gf = g_new (GFlareFile, 1);
+  gf->fp = fp;
+  gf->error = FALSE;
+
+  gflare = gflare_new ();
+  gflare->name = g_strdup (name);
+  gflare->filename = g_strdup (filename);
+
+  gflare_read_double   (&gflare->glow_opacity, gf);
+  gflare_read_mode     (&gflare->glow_mode, gf);
+  gflare_read_double   (&gflare->rays_opacity, gf);
+  gflare_read_mode     (&gflare->rays_mode, gf);
+  gflare_read_double   (&gflare->sflare_opacity, gf);
+  gflare_read_mode     (&gflare->sflare_mode, gf);
+
+  gflare_read_gradient_name (gflare->glow_radial, gf);
+  gflare_read_gradient_name (gflare->glow_angular, gf);
+  gflare_read_gradient_name (gflare->glow_angular_size, gf);
+  gflare_read_double   (&gflare->glow_size, gf);
+  gflare_read_double   (&gflare->glow_rotation, gf);
+  gflare_read_double   (&gflare->glow_hue, gf);
+
+  gflare_read_gradient_name (gflare->rays_radial, gf);
+  gflare_read_gradient_name (gflare->rays_angular, gf);
+  gflare_read_gradient_name (gflare->rays_angular_size, gf);
+  gflare_read_double   (&gflare->rays_size, gf);
+  gflare_read_double   (&gflare->rays_rotation, gf);
+  gflare_read_double   (&gflare->rays_hue, gf);
+  gflare_read_int      (&gflare->rays_nspikes, gf);
+  gflare_read_double   (&gflare->rays_thickness, gf);
+
+  gflare_read_gradient_name (gflare->sflare_radial, gf);
+  gflare_read_gradient_name (gflare->sflare_sizefac, gf);
+  gflare_read_gradient_name (gflare->sflare_probability, gf);
+  gflare_read_double   (&gflare->sflare_size, gf);
+  gflare_read_double   (&gflare->sflare_hue, gf);
+  gflare_read_double   (&gflare->sflare_rotation, gf);
+  gflare_read_shape    (&gflare->sflare_shape, gf);
+  gflare_read_int      (&gflare->sflare_nverts, gf);
+  gflare_read_int      ((gint *) &gflare->sflare_seed, gf);
+
+  if (gflare->sflare_seed == 0)
+    gflare->sflare_seed = g_random_int();
+
+  fclose (gf->fp);
+
+  if (gf->error)
+    {
+      g_warning (_("invalid formatted GFlare file: %s\n"), filename);
+      g_free (gflare);
+      g_free (gf);
+      return NULL;
+    }
+
+  g_free (gf);
+
+  return gflare;
+}
+
+static void
+gflare_read_int (gint       *intvar,
+                 GFlareFile *gf)
+{
+  if (gf->error)
+    return;
+
+  if (fscanf (gf->fp, "%d", intvar) != 1)
+    gf->error = TRUE;
+}
+
+static void
+gflare_read_double (gdouble    *dblvar,
+                    GFlareFile *gf)
+{
+  gchar buf[31];
+
+  if (gf->error)
+    return;
+
+  if (fscanf (gf->fp, "%30s", buf) == 1)
+    *dblvar = g_ascii_strtod (buf, NULL);
+  else
+    gf->error = TRUE;
+}
+
+static void
+gflare_read_gradient_name (GradientName  name,
+                           GFlareFile   *gf)
+{
+  gchar tmp[1024], dec[1024];
+
+  if (gf->error)
+    return;
+
+  /* FIXME: this is buggy */
+
+  if (fscanf (gf->fp, "%1023s", tmp) == 1)
+    {
+      /* @GRADIENT_NAME */
+      gradient_name_decode (dec, tmp);
+      gradient_name_copy (name, dec);
+    }
+  else
+    gf->error = TRUE;
+}
+
+static void
+gflare_read_shape (GFlareShape *shape,
+                   GFlareFile  *gf)
+{
+  gchar tmp[1024];
+  gint  i;
+
+  if (gf->error)
+    return;
+
+  if (fscanf (gf->fp, "%1023s", tmp) == 1)
+    {
+      for (i = 0; i < GF_NUM_SHAPES; i++)
+        if (strcmp (tmp, gflare_shapes[i]) == 0)
+          {
+            *shape = i;
+            return;
+          }
+    }
+  gf->error = TRUE;
+}
+
+static void
+gflare_read_mode (GFlareMode *mode,
+                  GFlareFile *gf)
+{
+  gchar tmp[1024];
+  gint  i;
+
+  if (gf->error)
+    return;
+
+  if (fscanf (gf->fp, "%1023s", tmp) == 1)
+    {
+      for (i = 0; i < GF_NUM_MODES; i++)
+        if (strcmp (tmp, gflare_modes[i]) == 0)
+          {
+            *mode = i;
+            return;
+          }
+    }
+  gf->error = TRUE;
+}
+
+static void
+gflare_save (GFlare *gflare)
+{
+  FILE  *fp;
+  gchar *path;
+  gchar  buf[3][G_ASCII_DTOSTR_BUF_SIZE];
+  static gboolean message_ok = FALSE;
+
+  if (gflare->filename == NULL)
+    {
+      GList *list;
+
+      if (gflare_path == NULL)
+        {
+          if (! message_ok)
+            {
+              gchar *gimprc      = gimp_personal_rc_file ("gimprc");
+              gchar *dir         = gimp_personal_rc_file ("gflare");
+              gchar *gflare_dir;
+
+              gflare_dir =
+                g_strescape ("${gimp_dir}" G_DIR_SEPARATOR_S "gflare", NULL);
+
+              g_message (_("GFlare '%s' is not saved. If you add a new entry "
+                           "in '%s', like:\n"
+                           "(gflare-path \"%s\")\n"
+                           "and make a folder '%s', then you can save "
+                           "your own GFlares into that folder."),
+                         gflare->name, gimprc, gflare_dir,
+                         gimp_filename_to_utf8 (dir));
+
+              g_free (gimprc);
+              g_free (gflare_dir);
+              g_free (dir);
+
+              message_ok = TRUE;
+            }
+
+          return;
+        }
+
+      list = gimp_path_parse (gflare_path, 256, FALSE, NULL);
+      path = gimp_path_get_user_writable_dir (list);
+      gimp_path_free (list);
+
+      if (! path)
+        path = g_strdup (gimp_directory ());
+
+      gflare->filename = g_build_filename (path, gflare->name, NULL);
+
+      g_free (path);
+    }
+
+  fp = g_fopen (gflare->filename, "wb");
+  if (!fp)
+    {
+      g_message (_("Failed to write GFlare file '%s': %s"),
+                  gimp_filename_to_utf8 (gflare->filename), g_strerror (errno));
+      return;
+    }
+
+  fprintf (fp, "%s", GFLARE_FILE_HEADER);
+  g_ascii_dtostr (buf[0],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->glow_opacity);
+  fprintf (fp, "%s %s\n", buf[0], gflare_modes[gflare->glow_mode]);
+  g_ascii_dtostr (buf[0],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->rays_opacity);
+  fprintf (fp, "%s %s\n", buf[0], gflare_modes[gflare->rays_mode]);
+  g_ascii_dtostr (buf[0],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->sflare_opacity);
+  fprintf (fp, "%s %s\n", buf[0], gflare_modes[gflare->sflare_mode]);
+
+  gflare_write_gradient_name (gflare->glow_radial, fp);
+  gflare_write_gradient_name (gflare->glow_angular, fp);
+  gflare_write_gradient_name (gflare->glow_angular_size, fp);
+  g_ascii_dtostr (buf[0],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->glow_size);
+  g_ascii_dtostr (buf[1],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->glow_rotation);
+  g_ascii_dtostr (buf[2],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->glow_hue);
+  fprintf (fp, "%s %s %s\n", buf[0], buf[1], buf[2]);
+
+  gflare_write_gradient_name (gflare->rays_radial, fp);
+  gflare_write_gradient_name (gflare->rays_angular, fp);
+  gflare_write_gradient_name (gflare->rays_angular_size, fp);
+  g_ascii_dtostr (buf[0],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->rays_size);
+  g_ascii_dtostr (buf[1],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->rays_rotation);
+  g_ascii_dtostr (buf[2],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->rays_hue);
+  fprintf (fp, "%s %s %s\n", buf[0], buf[1], buf[2]);
+  g_ascii_dtostr (buf[0],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->rays_thickness);
+  fprintf (fp, "%d %s\n", gflare->rays_nspikes, buf[0]);
+
+  gflare_write_gradient_name (gflare->sflare_radial, fp);
+  gflare_write_gradient_name (gflare->sflare_sizefac, fp);
+  gflare_write_gradient_name (gflare->sflare_probability, fp);
+  g_ascii_dtostr (buf[0],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->sflare_size);
+  g_ascii_dtostr (buf[1],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->sflare_rotation);
+  g_ascii_dtostr (buf[2],
+                  G_ASCII_DTOSTR_BUF_SIZE, gflare->sflare_hue);
+  fprintf (fp, "%s %s %s\n", buf[0], buf[1], buf[2]);
+  fprintf (fp, "%s %d %d\n",
+           gflare_shapes[gflare->sflare_shape],
+           gflare->sflare_nverts, gflare->sflare_seed);
+
+  fclose (fp);
+}
+
+static void
+gflare_write_gradient_name (GradientName  name,
+                            FILE         *fp)
+{
+  gchar enc[1024];
+
+  /* @GRADIENT_NAME */
+
+  /* encode white spaces and control characters (if any) */
+  gradient_name_encode (enc, name);
+
+  fprintf (fp, "%s\n", enc);
+}
+
+static void
+gflare_name_copy (gchar       *dest,
+                  const gchar *src)
+{
+  strncpy (dest, src, GFLARE_NAME_MAX - 1);
+  dest[GFLARE_NAME_MAX - 1] = '\0';
+}
+
+/*************************************************************************/
+/**                                                                     **/
+/**             +++ GFlares List                                        **/
+/**                                                                     **/
+/*************************************************************************/
+
+static gint
+gflare_compare (const GFlare *flare1,
+                const GFlare *flare2)
+{
+  return strcmp (flare1->name, flare2->name);
+}
+
+static gint
+gflares_list_insert (GFlare *gflare)
+{
+  num_gflares++;
+  gflares_list = g_list_insert_sorted (gflares_list, gflare,
+                                       (GCompareFunc) gflare_compare);
+  return gflares_list_index (gflare);
+}
+
+static gint
+gflare_compare_name (const GFlare *flare,
+                     const gchar  *name)
+{
+  return strcmp (flare->name, name);
+}
+
+static GFlare *
+gflares_list_lookup (const gchar *name)
+{
+  GList *llink;
+  llink = g_list_find_custom (gflares_list, name,
+                              (GCompareFunc) gflare_compare_name);
+  return (llink) ? llink->data : NULL;
+}
+
+static gint
+gflares_list_index (GFlare *gflare)
+{
+  return g_list_index (gflares_list, gflare);
+}
+
+static gint
+gflares_list_remove (GFlare *gflare)
+{
+  GList         *tmp;
+  gint          n;
+
+  n = 0;
+  tmp = gflares_list;
+  while (tmp)
+    {
+      if (tmp->data == gflare)
+        {
+          /* Found! */
+          if (tmp->next == NULL)
+          num_gflares--;
+          gflares_list = g_list_remove (gflares_list, gflare);
+          return n;
+        }
+      tmp = tmp->next;
+      n++;
+    }
+  return -1;
+}
+
+/*
+ * Load all gflares, which are founded in gflare-path-list, into gflares_list.
+ */
+static void
+gflares_list_load_all (void)
+{
+  GList *path;
+  GList *list;
+
+  /*  Make sure to clear any existing gflares  */
+  gflares_list_free_all ();
+
+  path = gimp_config_path_expand_to_files (gflare_path, NULL);
+
+  for (list = path; list; list = g_list_next (list))
+    {
+      GFileEnumerator *enumerator;
+
+      enumerator = g_file_enumerate_children (list->data,
+                                              G_FILE_ATTRIBUTE_STANDARD_NAME ","
+                                              G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN ","
+                                              G_FILE_ATTRIBUTE_STANDARD_TYPE,
+                                              G_FILE_QUERY_INFO_NONE,
+                                              NULL, NULL);
+
+      if (enumerator)
+        {
+          GFileInfo *info;
+
+          while ((info = g_file_enumerator_next_file (enumerator, NULL, NULL)))
+            {
+              GFileType file_type = g_file_info_get_file_type (info);
+
+              if (file_type == G_FILE_TYPE_REGULAR &&
+                  ! g_file_info_get_is_hidden (info))
+                {
+                  GFlare *gflare;
+                  GFile  *child;
+                  gchar  *filename;
+                  gchar  *basename;
+
+                  child = g_file_enumerator_get_child (enumerator, info);
+
+                  filename = g_file_get_path (child);
+                  basename = g_file_get_basename (child);
+
+                  gflare = gflare_load (filename, basename);
+
+                  g_free (filename);
+                  g_free (basename);
+
+                  if (gflare)
+                    gflares_list_insert (gflare);
+
+                  g_object_unref (child);
+                }
+
+              g_object_unref (info);
+            }
+
+          g_object_unref (enumerator);
+        }
+    }
+
+  g_list_free_full (path, (GDestroyNotify) g_object_unref);
+}
+
+static void
+gflares_list_free_all (void)
+{
+  g_list_free_full (gflares_list, (GDestroyNotify) gflare_free);
+  gflares_list = NULL;
+}
+
+/*************************************************************************/
+/**                                                                     **/
+/**             +++ Calculator                                          **/
+/**                                                                     **/
+/*************************************************************************/
+
+
+/*
+ * These routines calculates pixel values of particular gflare, at
+ * specified point.  The client which wants to get benefit from these
+ * calculation routines must call calc_init_params() first, and
+ * iterate calling calc_init_progress() until it returns FALSE. and
+ * must call calc_deinit() when job is done.
+ */
+
+static void
+calc_init_params (GFlare  *gflare,
+                  gint     calc_type,
+                  gdouble  xcenter,
+                  gdouble  ycenter,
+                  gdouble  radius,
+                  gdouble  rotation,
+                  gdouble  hue,
+                  gdouble  vangle,
+                  gdouble  vlength)
+{
+  calc.type            = calc_type;
+  calc.gflare          = gflare;
+  calc.xcenter         = xcenter;
+  calc.ycenter         = ycenter;
+  calc.radius          = radius;
+  calc.rotation        = rotation * G_PI / 180.0;
+  calc.hue             = hue;
+  calc.vangle          = vangle * G_PI / 180.0;
+  calc.vlength         = radius * vlength / 100.0;
+  calc.glow_radius     = radius * gflare->glow_size / 100.0;
+  calc.rays_radius     = radius * gflare->rays_size / 100.0;
+  calc.sflare_radius   = radius * gflare->sflare_size / 100.0;
+  calc.glow_rotation   = (rotation + gflare->glow_rotation) * G_PI / 180.0;
+  calc.rays_rotation   = (rotation + gflare->rays_rotation) * G_PI / 180.0;
+  calc.sflare_rotation = (rotation + gflare->sflare_rotation) * G_PI / 180.0;
+  calc.glow_opacity    = gflare->glow_opacity * 255 / 100.0;
+  calc.rays_opacity    = gflare->rays_opacity * 255 / 100.0;
+  calc.sflare_opacity  = gflare->sflare_opacity * 255 / 100.0;
+
+  calc.glow_bounds.x0 = calc.xcenter - calc.glow_radius - 0.1;
+  calc.glow_bounds.x1 = calc.xcenter + calc.glow_radius + 0.1;
+  calc.glow_bounds.y0 = calc.ycenter - calc.glow_radius - 0.1;
+  calc.glow_bounds.y1 = calc.ycenter + calc.glow_radius + 0.1;
+  calc.rays_bounds.x0 = calc.xcenter - calc.rays_radius - 0.1;
+  calc.rays_bounds.x1 = calc.xcenter + calc.rays_radius + 0.1;
+  calc.rays_bounds.y0 = calc.ycenter - calc.rays_radius - 0.1;
+  calc.rays_bounds.y1 = calc.ycenter + calc.rays_radius + 0.1;
+
+  /* Thanks to Marcelo Malheiros for this algorithm */
+  calc.rays_thinness  = log (gflare->rays_thickness / 100.0) / log(0.8);
+
+  calc.rays_spike_mod = 1.0 / (2 * gflare->rays_nspikes);
+
+  /*
+    Initialize part of sflare
+    The rest will be initialized in calc_sflare()
+   */
+  calc.sflare_list = NULL;
+  calc.sflare_shape = gflare->sflare_shape;
+  if (calc.sflare_shape == GF_POLYGON)
+    {
+      calc.sflare_angle = 2 * G_PI / (2 * gflare->sflare_nverts);
+      calc.sflare_factor = 1.0 / cos (calc.sflare_angle);
+    }
+
+  calc.glow_radial        = NULL;
+  calc.glow_angular       = NULL;
+  calc.glow_angular_size  = NULL;
+  calc.rays_radial        = NULL;
+  calc.rays_angular       = NULL;
+  calc.rays_angular_size  = NULL;
+  calc.sflare_radial      = NULL;
+  calc.sflare_sizefac     = NULL;
+  calc.sflare_probability = NULL;
+
+  calc.init = TRUE;
+}
+
+static int
+calc_init_progress (void)
+{
+  if (calc_sample_one_gradient ())
+    return TRUE;
+  calc_place_sflare ();
+  return FALSE;
+}
+
+/*
+   Store samples of gradient into an array
+   this routine is called during Calc initialization
+   this code is very messy... :( */
+static int
+calc_sample_one_gradient (void)
+{
+  static struct
+  {
+    guchar **values;
+    gint     name_offset;
+    gint     hue_offset;
+    gint     gray;
+  } table[] = {
+    {
+      &calc.glow_radial,
+      G_STRUCT_OFFSET (GFlare, glow_radial),
+      G_STRUCT_OFFSET (GFlare, glow_hue),
+      FALSE
+    },
+    {
+      &calc.glow_angular,
+      G_STRUCT_OFFSET (GFlare, glow_angular),
+      0,
+      FALSE
+    },
+    {
+      &calc.glow_angular_size,
+      G_STRUCT_OFFSET (GFlare, glow_angular_size),
+      0,
+      TRUE
+    },
+    {
+      &calc.rays_radial,
+      G_STRUCT_OFFSET (GFlare, rays_radial),
+      G_STRUCT_OFFSET (GFlare, rays_hue),
+      FALSE
+    },
+    {
+      &calc.rays_angular,
+      G_STRUCT_OFFSET (GFlare, rays_angular),
+      0,
+      FALSE
+    },
+    {
+      &calc.rays_angular_size,
+      G_STRUCT_OFFSET (GFlare, rays_angular_size),
+      0,
+      TRUE
+    },
+    {
+      &calc.sflare_radial,
+      G_STRUCT_OFFSET (GFlare, sflare_radial),
+      G_STRUCT_OFFSET (GFlare, sflare_hue),
+      FALSE
+    },
+    {
+      &calc.sflare_sizefac,
+      G_STRUCT_OFFSET (GFlare, sflare_sizefac),
+      0,
+      TRUE
+    },
+    {
+      &calc.sflare_probability,
+      G_STRUCT_OFFSET (GFlare, sflare_probability),
+      0,
+      TRUE
+    }
+  };
+  GFlare        *gflare = calc.gflare;
+  GradientName  *grad_name;
+  guchar        *gradient;
+  gdouble       hue_deg;
+  gint          i, j, hue;
+
+  for (i = 0; i < G_N_ELEMENTS (table); i++)
+    {
+      if (*(table[i].values) == NULL)
+        {
+          /* @GRADIENT_NAME */
+          grad_name = (GradientName *) ((char*) gflare + table[i].name_offset);
+          gradient = *(table[i].values) = g_new (guchar, 4 * GRADIENT_RESOLUTION);
+          gradient_get_values (*grad_name, gradient, GRADIENT_RESOLUTION);
+
+          /*
+           * Do hue rotation, if needed
+           */
+
+          if (table[i].hue_offset != 0)
+            {
+              hue_deg = calc.hue + *(gdouble *) ((char*) gflare + table[i].hue_offset);
+              hue = (gint) (hue_deg / 360.0 * 256.0) % 256;
+              if (hue < 0)
+                hue += 256;
+              g_assert (0 <= hue && hue < 256);
+
+              if (hue > 0)
+                {
+                  for (j = 0; j < GRADIENT_RESOLUTION; j++)
+                    {
+                      GimpRGB rgb;
+                      GimpHSV hsv;
+
+                      rgb.r = (gdouble) gradient[j*4]   / 255.0;
+                      rgb.g = (gdouble) gradient[j*4+1] / 255.0;
+                      rgb.b = (gdouble) gradient[j*4+2] / 255.0;
+
+                      gimp_rgb_to_hsv (&rgb, &hsv);
+
+                      hsv.h = (hsv.h + ((gdouble) hue / 255.0));
+                      if (hsv.h > 1.0)
+                        hsv.h -= 1.0;
+
+                      gimp_hsv_to_rgb (&hsv, &rgb);
+
+                      gradient[j*4]   = ROUND (rgb.r * 255.0);
+                      gradient[j*4+1] = ROUND (rgb.g * 255.0);
+                      gradient[j*4+2] = ROUND (rgb.b * 255.0);
+                    }
+                }
+            }
+
+          /*
+           *    Grayfy gradient, if needed
+           */
+
+          if (table[i].gray)
+            {
+              for (j = 0; j < GRADIENT_RESOLUTION; j++)
+                /* the first byte is enough */
+                gradient[j*4] = LUMINOSITY ((gradient + j*4));
+
+            }
+
+          /* sampling of one gradient is done */
+          return TRUE;
+        }
+    }
+  return FALSE;
+}
+
+static void
+calc_place_sflare (void)
+{
+  GFlare        *gflare;
+  CalcSFlare    *sflare;
+  gdouble       prob[GRADIENT_RESOLUTION];
+  gdouble       sum, sum2;
+  gdouble       pos;
+  gdouble       rnd, sizefac;
+  int           n;
+  int           i;
+  GRand        *gr;
+
+  gr = g_rand_new ();
+  if ((calc.type & CALC_SFLARE) == 0)
+    return;
+
+  gflare = calc.gflare;
+
+  /*
+    Calc cumulative probability
+    */
+
+  sum = 0.0;
+  for (i = 0; i < GRADIENT_RESOLUTION; i++)
+    {
+      /* probability gradient was grayfied already */
+      prob[i] = calc.sflare_probability[i*4];
+      sum += prob[i];
+    }
+
+  if (sum == 0.0)
+    sum = 1.0;
+
+  sum2 = 0;
+  for (i = 0; i < GRADIENT_RESOLUTION; i++)
+    {
+      sum2 += prob[i];          /* cumulation */
+      prob[i] = sum2 / sum;
+    }
+
+  g_rand_set_seed (gr, gflare->sflare_seed);
+
+  for (n = 0; n < SFLARE_NUM; n++)
+    {
+      sflare = g_new (CalcSFlare, 1);
+      rnd = g_rand_double (gr);
+      for (i = 0; i < GRADIENT_RESOLUTION; i++)
+        if (prob[i] >= rnd)
+          break;
+      if (i >= GRADIENT_RESOLUTION)
+        i = GRADIENT_RESOLUTION - 1;
+
+      /* sizefac gradient was grayfied already */
+      sizefac = calc.sflare_sizefac[i*4] / 255.0;
+      sizefac = pow (sizefac, 5.0);
+
+      pos = (double) (i - GRADIENT_RESOLUTION / 2) / GRADIENT_RESOLUTION;
+      sflare->xcenter = calc.xcenter + cos (calc.vangle) * calc.vlength * pos;
+      sflare->ycenter = calc.ycenter - sin (calc.vangle) * calc.vlength * pos;
+      sflare->radius = sizefac * calc.sflare_radius; /* FIXME */
+      sflare->bounds.x0 = sflare->xcenter - sflare->radius - 1;
+      sflare->bounds.x1 = sflare->xcenter + sflare->radius + 1;
+      sflare->bounds.y0 = sflare->ycenter - sflare->radius - 1;
+      sflare->bounds.y1 = sflare->ycenter + sflare->radius + 1;
+      calc.sflare_list = g_list_append (calc.sflare_list, sflare);
+    }
+
+  g_rand_free (gr);
+}
+
+static void
+calc_deinit (void)
+{
+  if (!calc.init)
+    {
+      g_warning("calc_deinit: not initialized");
+      return;
+    }
+
+  g_list_free_full (calc.sflare_list, (GDestroyNotify) g_free);
+
+  g_free (calc.glow_radial);
+  g_free (calc.glow_angular);
+  g_free (calc.glow_angular_size);
+  g_free (calc.rays_radial);
+  g_free (calc.rays_angular);
+  g_free (calc.rays_angular_size);
+  g_free (calc.sflare_radial);
+  g_free (calc.sflare_sizefac);
+  g_free (calc.sflare_probability);
+
+  calc.init = FALSE;
+}
+
+/*
+ *  Get sample value at specified position of a gradient
+ *
+ *  gradient samples are stored into array at the time of
+ *  calc_sample_one_gradients (), and it is now linear interpolated.
+ *
+ *  INPUT:
+ *      guchar  gradient[4*GRADIENT_RESOLUTION]         gradient array(RGBA)
+ *      gdouble pos                                     position (0<=pos<=1)
+ *  OUTPUT:
+ *      guchar  pix[4]
+ */
+static void
+calc_get_gradient (guchar *pix, guchar *gradient, gdouble pos)
+{
+  gint          ipos;
+  gdouble       frac;
+  gint          i;
+
+  if (pos < 0 || pos > 1)
+    {
+      pix[0] = pix[1] = pix[2] = pix[3] = 0;
+      return;
+    }
+  pos *= GRADIENT_RESOLUTION - 1.0001;
+  ipos = (gint) pos;    frac = pos - ipos;
+  gradient += ipos * 4;
+
+  for (i = 0; i < 4; i++)
+    {
+      pix[i] = gradient[i] * (1 - frac) + gradient[i+4] * frac;
+    }
+}
+
+/* I need fmod to return always positive value */
+static gdouble
+fmod_positive (gdouble x, gdouble m)
+{
+  return x - floor (x/m) * m;
+}
+
+/*
+ *  Calc glow's pixel (RGBA) value
+ *  INPUT:
+ *      gdouble x, y                    image coordinates
+ *  OUTPUT:
+ *      guchar  pix[4]
+ */
+static void
+calc_glow_pix (guchar *dest_pix, gdouble x, gdouble y)
+{
+  gdouble radius, angle;
+  gdouble angular_size;
+  guchar  radial_pix[4], angular_pix[4], size_pix[4];
+  gint    i;
+
+  if ((calc.type & CALC_GLOW) == 0
+      || x < calc.glow_bounds.x0 || x > calc.glow_bounds.x1
+      || y < calc.glow_bounds.y0 || y > calc.glow_bounds.y1)
+    {
+      memset (dest_pix, 0, 4);
+      return;
+    }
+
+  x -= calc.xcenter;
+  y -= calc.ycenter;
+  radius = sqrt (x*x + y*y) / calc.glow_radius;
+  angle = (atan2 (-y, x) + calc.glow_rotation ) / (2 * G_PI);
+  angle = fmod_positive (angle, 1.0);
+
+  calc_get_gradient (size_pix, calc.glow_angular_size, angle);
+  /* angular_size gradient was grayfied already */
+  angular_size = size_pix[0] / 255.0;
+  radius /= (angular_size+0.0001);      /* in case angular_size == 0.0 */
+  if (radius < 0 || radius > 1)
+    {
+      memset (dest_pix, 0, 4);
+      return;
+    }
+
+  calc_get_gradient (radial_pix, calc.glow_radial, radius);
+  calc_get_gradient (angular_pix, calc.glow_angular, angle);
+
+  for (i = 0; i < 4; i++)
+    dest_pix[i] = radial_pix[i] * angular_pix[i] / 255;
+}
+
+/*
+ *  Calc rays's pixel (RGBA) value
+ *
+ */
+static void
+calc_rays_pix (guchar *dest_pix, gdouble x, gdouble y)
+{
+  gdouble radius, angle;
+  gdouble angular_size;
+  gdouble spike_frac, spike_inten, spike_angle;
+  guchar  radial_pix[4], angular_pix[4], size_pix[4];
+  gint    i;
+
+  if ((calc.type & CALC_RAYS) == 0
+      || x < calc.rays_bounds.x0 || x > calc.rays_bounds.x1
+      || y < calc.rays_bounds.y0 || y > calc.rays_bounds.y1)
+    {
+      memset (dest_pix, 0, 4);
+      return;
+    }
+
+  x -= calc.xcenter;
+  y -= calc.ycenter;
+  radius = sqrt (x*x + y*y) / calc.rays_radius;
+  angle = (atan2 (-y, x) + calc.rays_rotation ) / (2 * G_PI);
+  angle = fmod_positive (angle, 1.0);   /* make sure 0 <= angle < 1.0 */
+  spike_frac = fmod (angle, calc.rays_spike_mod * 2);
+  spike_angle = angle - spike_frac + calc.rays_spike_mod;
+  spike_frac = (angle - spike_angle) / calc.rays_spike_mod;
+  /* spike_frac is between -1.0 and 1.0 here (except round error...) */
+
+  spike_inten = pow (1.0 - fabs (spike_frac), calc.rays_thinness);
+
+  calc_get_gradient (size_pix, calc.rays_angular_size, spike_angle);
+  /* angular_size gradient was grayfied already */
+  angular_size = size_pix[0] / 255.0;
+  radius /= (angular_size+0.0001);      /* in case angular_size == 0.0 */
+  if(radius < 0 || radius > 1)
+    {
+      memset (dest_pix, 0, 4);
+      return;
+    }
+
+  calc_get_gradient (radial_pix, calc.rays_radial, radius);
+  calc_get_gradient (angular_pix, calc.rays_angular, spike_angle);
+
+  for (i = 0; i < 3; i++)
+    dest_pix[i] =  radial_pix[i] * angular_pix[i] / 255;
+  dest_pix[3] = spike_inten * radial_pix[3] * angular_pix[3] / 255;
+}
+
+/*
+ *  Calc sflare's pixel (RGBA) value
+ *
+ *  the sflare (second flares) are needed to be rendered one each
+ *  sequentially, onto the source image, such as like usual layer
+ *  operations. So the function takes src_pix as argument.  glow, rays
+ *  routines don't have src_pix as argument, because of convenience.
+ *
+ *  @JAPANESE
+ *  sflare $B$OJ#?t$N%U%l%"$r=g$K(B($B%l%$%dE*$K(B)$B$+$V$;$J$,$iIA2h$9$kI,MW$,(B
+ *  $B$"$k$N$G!"$3$l$@$1(B src_pix $B$r0z?t$K$H$C$F(B paint_func $B$rE,MQ$9$k!#(B
+ *  glow, rays $B$O4J0W2=$N$?$a$K$J$7!#(B
+ */
+void
+calc_sflare_pix (guchar *dest_pix, gdouble x, gdouble y, guchar *src_pix)
+{
+  GList         *list;
+  CalcSFlare    *sflare;
+  gdouble       sx, sy, th;
+  gdouble       radius, angle;
+  guchar        radial_pix[4], tmp_pix[4];
+
+  memcpy (dest_pix, src_pix, 4);
+
+  if ((calc.type & CALC_SFLARE) == 0)
+    return;
+
+  list = calc.sflare_list;
+  while (list)
+    {
+      sflare = list->data;
+      list = list->next;
+
+      if (x < sflare->bounds.x0 || x > sflare->bounds.x1
+          || y < sflare->bounds.y0 || y > sflare->bounds.y1)
+        continue;
+      sx = x - sflare->xcenter;
+      sy = y - sflare->ycenter;
+      radius = sqrt (sx * sx + sy * sy) / sflare->radius;
+      if (calc.sflare_shape == GF_POLYGON)
+        {
+          angle = atan2 (-sy, sx) - calc.vangle + calc.sflare_rotation;
+          th = fmod_positive (angle, calc.sflare_angle * 2) - calc.sflare_angle;
+          radius *= cos (th) * calc.sflare_factor;
+        }
+      if (radius < 0 || radius > 1)
+        continue;
+
+      calc_get_gradient (radial_pix, calc.sflare_radial, radius);
+      memcpy (tmp_pix, dest_pix, 4);
+      calc_paint_func (dest_pix, tmp_pix, radial_pix,
+                       calc.sflare_opacity, calc.gflare->sflare_mode);
+    }
+}
+
+static void
+calc_gflare_pix (guchar *dest_pix, gdouble x, gdouble y, guchar *src_pix)
+{
+  GFlare        *gflare = calc.gflare;
+  guchar        glow_pix[4], rays_pix[4];
+  guchar        tmp_pix[4];
+
+  memcpy (dest_pix, src_pix, 4);
+
+  if (calc.type & CALC_GLOW)
+    {
+      memcpy (tmp_pix, dest_pix, 4);
+      calc_glow_pix (glow_pix, x, y);
+      calc_paint_func (dest_pix, tmp_pix, glow_pix,
+                       calc.glow_opacity, gflare->glow_mode);
+    }
+  if (calc.type & CALC_RAYS)
+    {
+      memcpy (tmp_pix, dest_pix, 4);
+      calc_rays_pix (rays_pix, x, y);
+      calc_paint_func (dest_pix, tmp_pix, rays_pix,
+                       calc.rays_opacity, gflare->rays_mode);
+    }
+  if (calc.type & CALC_SFLARE)
+    {
+      memcpy (tmp_pix, dest_pix, 4);
+      calc_sflare_pix (dest_pix, x, y, tmp_pix);
+    }
+}
+
+/*
+        Paint func routines, such as Normal, Addition, ...
+ */
+static void
+calc_paint_func (guchar *dest, guchar *src1, guchar *src2, gint opacity,
+                 GFlareMode mode)
+{
+  guchar        buf[4], *s=buf;
+
+  if (src2[3] == 0 || opacity <= 0)
+    {
+      memcpy (dest, src1, 4);
+      return;
+    }
+
+  switch (mode)
+    {
+    case GF_NORMAL:
+      s = src2;
+      break;
+    case GF_ADDITION:
+      calc_addition (s, src1, src2);
+      break;
+    case GF_OVERLAY:
+      calc_overlay (s, src1, src2);
+      break;
+    case GF_SCREEN:
+      calc_screen (s, src1, src2);
+      break;
+    default:
+      s = src2;
+      break;
+    }
+  calc_combine (dest, src1, s, opacity);
+}
+
+static void
+calc_combine (guchar *dest, guchar *src1, guchar *src2, gint opacity)
+{
+  gdouble       s1_a, s2_a, new_a;
+  gdouble       ratio, compl_ratio;
+  gint          i;
+
+  s1_a = src1[3] / 255.0;
+  s2_a = src2[3] * opacity / 65025.0;
+  new_a  = s1_a + (1.0 - s1_a) * s2_a;
+
+  if (new_a != 0.0)
+    ratio = s2_a / new_a;
+  else
+    ratio = 0.0;
+
+  compl_ratio = 1.0 - ratio;
+
+  for (i = 0; i < 3; i++)
+    dest[i] = src1[i] * compl_ratio + src2[i] * ratio;
+
+  dest[3] = new_a * 255.0;
+}
+
+static void
+calc_addition (guchar *dest, guchar *src1, guchar *src2)
+{
+  gint          tmp, i;
+
+  for (i = 0; i < 3; i++)
+    {
+      tmp = src1[i] + src2[i];
+      dest[i] = tmp <= 255 ? tmp: 255;
+    }
+  dest[3] = MIN (src1[3], src2[3]);
+}
+
+static void
+calc_screen (guchar *dest, guchar *src1, guchar *src2)
+{
+  gint          i;
+
+  for (i = 0; i < 3; i++)
+    {
+      dest[i] = 255 - ((255 - src1[i]) * (255 - src2[i])) / 255;
+    }
+  dest[3] = MIN (src1[3], src2[3]);
+}
+
+static void
+calc_overlay (guchar *dest, guchar *src1, guchar *src2)
+{
+  gint          screen, mult, i;
+
+  for (i = 0; i < 3; i++)
+    {
+      screen = 255 - ((255 - src1[i]) * (255 - src2[i])) / 255;
+      mult = (src1[i] * src2[i]) / 255;
+      dest[i] = (screen * src1[i] + mult * (255 - src1[i])) / 255;
+    }
+  dest[3] = MIN (src1[3], src2[3]);
+}
+
+/*************************************************************************/
+/**                                                                     **/
+/**                     Main Dialog                                     **/
+/**                     +++ dlg                                         **/
+/**                                                                     **/
+/*************************************************************************/
+
+/*
+        This is gflare main dialog, one which opens in first.
+ */
+
+static gboolean
+dlg_run (void)
+{
+  GeglBuffer *src_buffer;
+  GtkWidget  *shell;
+  GtkWidget  *hbox;
+  GtkWidget  *vbox;
+  GtkWidget  *frame;
+  GtkWidget  *abox;
+  GtkWidget  *button;
+  GtkWidget  *notebook;
+  gboolean    run = FALSE;
+
+  gimp_ui_init (PLUG_IN_BINARY, TRUE);
+
+  /*
+   *    Init Main Dialog
+   */
+
+  dlg = g_new0 (GFlareDialog, 1);
+  dlg->init           = TRUE;
+  dlg->update_preview = TRUE;
+
+  gradient_menu_init (); /* FIXME: this should go elsewhere  */
+  dlg_setup_gflare ();
+
+  g_assert (gflares_list != NULL);
+  g_assert (dlg->gflare != NULL);
+  g_assert (dlg->gflare->name != NULL);
+
+  /*
+   *    Dialog Shell
+   */
+
+  shell = dlg->shell = gimp_dialog_new (_("Gradient Flare"), PLUG_IN_ROLE,
+                                        NULL, 0,
+                                        gimp_standard_help_func, PLUG_IN_PROC,
+
+                                        _("_Cancel"), GTK_RESPONSE_CANCEL,
+                                        _("_OK"),     GTK_RESPONSE_OK,
+
+                                        NULL);
+
+  gtk_dialog_set_alternative_button_order (GTK_DIALOG (shell),
+                                           GTK_RESPONSE_OK,
+                                           GTK_RESPONSE_CANCEL,
+                                           -1);
+
+  /*
+   *    main hbox
+   */
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (hbox), 12);
+  gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (shell))),
+                      hbox, FALSE, FALSE, 0);
+  gtk_widget_show (hbox);
+
+  /*
+   *    Preview
+   */
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
+  gtk_box_pack_start (GTK_BOX (hbox), vbox, FALSE, FALSE, 0);
+  gtk_widget_show (vbox);
+
+  abox = gtk_alignment_new (0.0, 0.0, 0.0, 0.0);
+  gtk_box_pack_start (GTK_BOX (vbox), abox, TRUE, TRUE, 0);
+  gtk_widget_show (abox);
+
+  frame = gtk_frame_new (NULL);
+  gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
+  gtk_container_add (GTK_CONTAINER (abox), frame);
+  gtk_widget_show (frame);
+
+  src_buffer = gimp_drawable_get_buffer (drawable_ID);
+
+  dlg->preview = preview_new (DLG_PREVIEW_WIDTH, DLG_PREVIEW_HEIGHT,
+                              dlg_preview_init_func, NULL,
+                              dlg_preview_render_func, src_buffer,
+                              dlg_preview_deinit_func, NULL);
+  gtk_widget_set_events (GTK_WIDGET (dlg->preview->widget), DLG_PREVIEW_MASK);
+  gtk_container_add (GTK_CONTAINER (frame), dlg->preview->widget);
+
+  g_signal_connect (dlg->preview->widget, "realize",
+                    G_CALLBACK (dlg_preview_realize),
+                    NULL);
+  g_signal_connect (dlg->preview->widget, "event",
+                    G_CALLBACK (dlg_preview_handle_event),
+                    NULL);
+
+  dlg_preview_calc_window ();
+
+  button = gtk_check_button_new_with_mnemonic (_("A_uto update preview"));
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button),
+                                dlg->update_preview);
+  gtk_box_pack_end (GTK_BOX (vbox), button, FALSE, FALSE, 0);
+  gtk_widget_show (button);
+
+  g_signal_connect (button, "toggled",
+                    G_CALLBACK (dlg_update_preview_callback),
+                    &dlg->update_preview);
+
+  /*
+   *    Notebook
+   */
+
+  notebook = dlg->notebook = gtk_notebook_new ();
+  gtk_box_pack_start (GTK_BOX (hbox), notebook, TRUE, TRUE, 0);
+  gtk_widget_show (notebook);
+
+  dlg_make_page_settings (dlg, notebook);
+  dlg_make_page_selector (dlg, notebook);
+
+  gtk_widget_show (shell);
+
+  /*
+   *    Initialization done
+   */
+  dlg->init = FALSE;
+  dlg_preview_update ();
+
+  if (gimp_dialog_run (GIMP_DIALOG (shell)) == GTK_RESPONSE_OK)
+    {
+      gflare_name_copy (pvals.gflare_name, dlg->gflare->name);
+
+      run = TRUE;
+    }
+
+  g_object_unref (src_buffer);
+
+  gtk_widget_destroy (shell);
+
+  return run;
+}
+
+static void
+dlg_setup_gflare (void)
+{
+  dlg->gflare = gflares_list_lookup (pvals.gflare_name);
+
+  if (!dlg->gflare)
+    {
+      dlg->gflare = gflares_list_lookup ("Default");
+      if (!dlg->gflare)
+        {
+          g_warning (_("'Default' is created."));
+          dlg->gflare = gflare_new_with_default (_("Default"));
+          gflares_list_insert (dlg->gflare);
+        }
+    }
+}
+
+/***********************************/
+/**     Main Dialog / Preview     **/
+/***********************************/
+
+/*
+ *      Calculate preview's window, ie. translation of preview widget and
+ *      drawable.
+ *
+ *      x0, x1, y0, y1 are drawable coord, corresponding with top left
+ *      corner of preview widget, etc.
+ */
+void
+dlg_preview_calc_window (void)
+{
+  gint     width  = gimp_drawable_width  (drawable_ID);
+  gint     height = gimp_drawable_height (drawable_ID);
+  gint     is_wide;
+  gdouble  offx, offy;
+
+  is_wide = ((double) DLG_PREVIEW_HEIGHT * width >=
+             (double) DLG_PREVIEW_WIDTH  * height);
+
+  if (is_wide)
+    {
+      offy = ((double) width * DLG_PREVIEW_HEIGHT / DLG_PREVIEW_WIDTH) / 2.0;
+
+      dlg->pwin.x0 = 0;
+      dlg->pwin.x1 = width;
+      dlg->pwin.y0 = height / 2.0 - offy;
+      dlg->pwin.y1 = height / 2.0 + offy;
+    }
+  else
+    {
+      offx = ((double) height * DLG_PREVIEW_WIDTH / DLG_PREVIEW_HEIGHT) / 2.0;
+
+      dlg->pwin.x0 = width / 2.0 - offx;
+      dlg->pwin.x1 = width / 2.0 + offx;
+      dlg->pwin.y0 = 0;
+      dlg->pwin.y1 = height;
+    }
+}
+
+void
+ed_preview_calc_window (void)
+{
+  gint     width  = gimp_drawable_width  (drawable_ID);
+  gint     height = gimp_drawable_height (drawable_ID);
+  gint     is_wide;
+  gdouble  offx, offy;
+
+  is_wide = ((double) DLG_PREVIEW_HEIGHT * width >=
+             (double) DLG_PREVIEW_WIDTH  * height);
+
+  if (is_wide)
+    {
+      offy = ((double) width * DLG_PREVIEW_HEIGHT / DLG_PREVIEW_WIDTH) / 2.0;
+
+      dlg->pwin.x0 = 0;
+      dlg->pwin.x1 = width;
+      dlg->pwin.y0 = height / 2.0 - offy;
+      dlg->pwin.y1 = height / 2.0 + offy;
+    }
+  else
+    {
+      offx = ((double) height * DLG_PREVIEW_WIDTH / DLG_PREVIEW_HEIGHT) / 2.0;
+
+      dlg->pwin.x0 = width / 2.0 - offx;      dlg->pwin.x1 = width / 2.0 + offx;
+      dlg->pwin.y0 = 0;
+      dlg->pwin.y1 = height;
+    }
+}
+
+static void
+dlg_preview_realize (GtkWidget *widget)
+{
+  GdkDisplay *display = gtk_widget_get_display (widget);
+  GdkCursor  *cursor  = gdk_cursor_new_for_display (display, GDK_CROSSHAIR);
+
+  gdk_window_set_cursor (gtk_widget_get_window (widget), cursor);
+  gdk_cursor_unref (cursor);
+}
+
+static gboolean
+dlg_preview_handle_event (GtkWidget *widget,
+                          GdkEvent  *event)
+{
+  GdkEventButton *bevent;
+  gint           bx, by, x, y;
+
+  switch (event->type)
+    {
+    case GDK_BUTTON_PRESS:
+      bevent = (GdkEventButton *) event;
+      bx = bevent->x;
+      by = bevent->y;
+
+      /* convert widget coord to drawable coord */
+      x = dlg->pwin.x0 + (double) (dlg->pwin.x1 - dlg->pwin.x0)
+                                        * bx / DLG_PREVIEW_WIDTH;
+      y = dlg->pwin.y0 + (double) (dlg->pwin.y1 - dlg->pwin.y0)
+                                        * by / DLG_PREVIEW_HEIGHT;
+
+      if ((x != pvals.xcenter || y != pvals.ycenter))
+        {
+          if (x != pvals.xcenter)
+            {
+              pvals.xcenter = x;
+              gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (dlg->sizeentry),
+                                          0, x);
+            }
+          if (y != pvals.ycenter)
+            {
+              pvals.ycenter = y;
+              gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (dlg->sizeentry),
+                                          1, y);
+            }
+          dlg_preview_update ();
+        }
+      return TRUE;
+    default:
+      break;
+    }
+  return FALSE;
+}
+
+static void
+dlg_preview_update (void)
+{
+  if (!dlg->init && dlg->update_preview)
+    {
+      dlg->init_params_done = FALSE;
+      preview_render_start (dlg->preview);
+    }
+}
+
+/*      preview callbacks       */
+static gint
+dlg_preview_init_func (Preview *preview, gpointer data)
+{
+  /* call init_params first, and iterate init_progress while
+     it returns true */
+  if (dlg->init_params_done == FALSE)
+    {
+      calc_init_params (dlg->gflare,
+                        CALC_GLOW | CALC_RAYS | CALC_SFLARE,
+                        pvals.xcenter, pvals.ycenter,
+                        pvals.radius, pvals.rotation, pvals.hue,
+                        pvals.vangle, pvals.vlength);
+      dlg->init_params_done = TRUE;
+      return TRUE;
+    }
+  return calc_init_progress ();
+}
+
+/* render preview
+   do what "preview" means, ie. render lense flare effect onto drawable */
+static void
+dlg_preview_render_func (Preview  *preview,
+                         guchar   *dest,
+                         gint      y,
+                         gpointer  data)
+{
+  GeglBuffer *src_buffer = data;
+  gint        width      = gimp_drawable_width  (drawable_ID);
+  gint        height     = gimp_drawable_height (drawable_ID);
+  gint        x;
+  gint        dx, dy;         /* drawable x, y */
+  guchar     *src_row, *src;
+  guchar      src_pix[4], dest_pix[4];
+  gint        b;
+
+  dy = (dlg->pwin.y0 +
+        (gdouble) (dlg->pwin.y1 - dlg->pwin.y0) * y / DLG_PREVIEW_HEIGHT);
+
+  if (dy < 0 || dy >= height)
+    {
+      memset (dest, GRAY50, 3 * DLG_PREVIEW_WIDTH);
+      return;
+    }
+
+  src_row = g_new (guchar, dinfo.bpp * width);
+
+  gegl_buffer_get (src_buffer, GEGL_RECTANGLE (0, dy, width, 1), 1.0,
+                   dinfo.format, src_row,
+                   GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+  for (x = 0; x < DLG_PREVIEW_HEIGHT; x++)
+    {
+      dx = (dlg->pwin.x0 +
+            (double) (dlg->pwin.x1 - dlg->pwin.x0) * x / DLG_PREVIEW_WIDTH);
+
+      if (dx < 0 || dx >= width)
+        {
+          for (b = 0; b < 3; b++)
+            *dest++ = GRAY50;
+          continue;
+        }
+
+      /* Get drawable pix value */
+      src = &src_row[dx * dinfo.bpp];
+
+      for (b = 0; b < 3; b++)
+        src_pix[b] = dinfo.is_color ? src[b] : src[0];
+      src_pix[3] = dinfo.has_alpha ? src[dinfo.bpp - 1] : OPAQUE;
+
+      /* Get GFlare pix value */
+
+      calc_gflare_pix (dest_pix, dx, dy, src_pix);
+
+      /* Draw gray check if needed */
+      preview_rgba_to_rgb (dest, x, y, dest_pix);
+      dest += 3;
+    }
+
+  g_free (src_row);
+}
+
+static void
+dlg_preview_deinit_func (Preview *preview, gpointer data)
+{
+  if (dlg->init_params_done)
+    {
+      calc_deinit ();
+      dlg->init_params_done = TRUE;
+    }
+}
+
+/*****************************************/
+/**     Main Dialog / Settings Page     **/
+/*****************************************/
+
+static void
+dlg_make_page_settings (GFlareDialog *dlg,
+                        GtkWidget    *notebook)
+{
+  GtkWidget *main_vbox;
+  GtkWidget *frame;
+  GtkWidget *center;
+  GtkWidget *chain;
+  GtkWidget *table;
+  GtkWidget *button;
+  GtkWidget *asup_table;
+  GtkObject *adj;
+  gdouble    xres, yres;
+  gint       row;
+
+  main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
+
+  frame = gimp_frame_new (_("Center"));
+  gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  gimp_image_get_resolution (image_ID, &xres, &yres);
+
+  center = dlg->sizeentry =
+    gimp_coordinates_new (gimp_image_get_unit (image_ID), "%a",
+                          TRUE, TRUE, 75, GIMP_SIZE_ENTRY_UPDATE_SIZE,
+
+                          FALSE, FALSE,
+
+                          _("_X:"), pvals.xcenter, xres,
+                          -GIMP_MAX_IMAGE_SIZE, GIMP_MAX_IMAGE_SIZE,
+                          0, gimp_drawable_width (drawable_ID),
+
+                          _("_Y:"), pvals.ycenter, yres,
+                          -GIMP_MAX_IMAGE_SIZE, GIMP_MAX_IMAGE_SIZE,
+                          0, gimp_drawable_height (drawable_ID));
+
+  chain = GTK_WIDGET (GIMP_COORDINATES_CHAINBUTTON (center));
+
+  gtk_container_add (GTK_CONTAINER (frame), center);
+  g_signal_connect (center, "value-changed",
+                    G_CALLBACK (dlg_position_entry_callback),
+                    NULL);
+  g_signal_connect (center, "refval-changed",
+                    G_CALLBACK (dlg_position_entry_callback),
+                    NULL);
+  gtk_widget_hide (chain);
+  gtk_widget_show (center);
+
+  frame = gimp_frame_new (_("Parameters"));
+  gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (5, 3, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+  gtk_widget_show (table);
+
+  row = 0;
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("_Radius:"), SCALE_WIDTH, 6,
+                              pvals.radius, 0.0,
+                              gimp_drawable_width (drawable_ID) / 2,
+                              1.0, 10.0, 1,
+                              FALSE, 0.0, GIMP_MAX_IMAGE_SIZE,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &pvals.radius);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (dlg_preview_update),
+                    NULL);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Ro_tation:"), SCALE_WIDTH, 6,
+                              pvals.rotation, -180.0, 180.0, 1.0, 15.0, 1,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &pvals.rotation);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (dlg_preview_update),
+                    NULL);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("_Hue rotation:"), SCALE_WIDTH, 6,
+                              pvals.hue, -180.0, 180.0, 1.0, 15.0, 1,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &pvals.hue);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (dlg_preview_update),
+                    NULL);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Vector _angle:"), SCALE_WIDTH, 6,
+                              pvals.vangle, 0.0, 359.0, 1.0, 15.0, 1,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &pvals.vangle);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (dlg_preview_update),
+                    NULL);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Vector _length:"), SCALE_WIDTH, 6,
+                              pvals.vlength, 1, 1000, 1.0, 10.0, 1,
+                              FALSE, 1, GIMP_MAX_IMAGE_SIZE,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &pvals.vlength);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (dlg_preview_update),
+                    NULL);
+
+  /**
+  ***   Asupsample settings
+  ***   This code is stolen from gimp-0.99.x/app/blend.c
+  **/
+
+  /*  asupsample frame */
+  frame = dlg->asupsample_frame = gimp_frame_new (NULL);
+  gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  button = gtk_check_button_new_with_mnemonic (_("A_daptive supersampling"));
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button),
+                                pvals.use_asupsample);
+  gtk_frame_set_label_widget (GTK_FRAME (frame), button);
+  gtk_widget_show (button);
+
+  asup_table = gtk_table_new (2, 3, FALSE);
+  gtk_table_set_col_spacings (GTK_TABLE (asup_table), 6);
+  gtk_table_set_row_spacings (GTK_TABLE (asup_table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), asup_table);
+  gtk_widget_show (asup_table);
+
+  g_signal_connect (button, "toggled",
+                    G_CALLBACK (gimp_toggle_button_update),
+                    &pvals.use_asupsample);
+
+  g_object_bind_property (button,     "active",
+                          asup_table, "sensitive",
+                          G_BINDING_SYNC_CREATE);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (asup_table), 0, 0,
+                              _("_Max depth:"), -1, 4,
+                              pvals.asupsample_max_depth,
+                              1.0, 10.0, 1.0, 1.0, 0,
+                              TRUE, 0.0, 0.0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_int_adjustment_update),
+                    &pvals.asupsample_max_depth);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (asup_table), 0, 1,
+                              _("_Threshold"), -1, 4,
+                              pvals.asupsample_threshold,
+                              0.0, 4.0, 0.01, 0.01, 2,
+                              TRUE, 0.0, 0.0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &pvals.asupsample_threshold);
+
+  gtk_notebook_append_page (GTK_NOTEBOOK (notebook), main_vbox,
+                            gtk_label_new_with_mnemonic (_("_Settings")));
+  gtk_widget_show (main_vbox);
+}
+
+static void
+dlg_position_entry_callback (GtkWidget *widget, gpointer data)
+{
+  gint x, y;
+
+  x = RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0));
+  y = RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 1));
+
+  DEBUG_PRINT (("dlg_position_entry_callback\n"));
+
+  if (pvals.xcenter != x ||
+      pvals.ycenter != y)
+    {
+      pvals.xcenter = x;
+      pvals.ycenter = y;
+
+      dlg_preview_update ();
+    }
+}
+
+static void
+dlg_update_preview_callback (GtkWidget *widget,
+                             gpointer   data)
+{
+  gimp_toggle_button_update (widget, data);
+
+  dlg_preview_update ();
+}
+
+/*****************************************/
+/**     Main Dialog / Selector Page     **/
+/*****************************************/
+
+static void
+dlg_make_page_selector (GFlareDialog *dlg,
+                        GtkWidget    *notebook)
+{
+  GtkWidget         *vbox;
+  GtkWidget         *hbox;
+  GtkWidget         *listbox;
+  GtkListStore      *list;
+  GtkWidget         *listview;
+  GtkCellRenderer   *renderer;
+  GtkTreeViewColumn *column;
+  GtkWidget         *button;
+  gint               i;
+
+  static struct
+  {
+    const gchar *label;
+    GCallback    callback;
+  }
+  buttons[] =
+  {
+    { N_("_New"),    G_CALLBACK (dlg_selector_new_callback)    },
+    { N_("_Edit"),   G_CALLBACK (dlg_selector_edit_callback)   },
+    { N_("_Copy"),   G_CALLBACK (dlg_selector_copy_callback)   },
+    { N_("_Delete"), G_CALLBACK (dlg_selector_delete_callback) }
+  };
+
+  DEBUG_PRINT (("dlg_make_page_selector\n"));
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
+
+  /*
+   *    List Box
+   */
+
+  listbox = gtk_scrolled_window_new (NULL, NULL);
+  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (listbox),
+                                  GTK_POLICY_AUTOMATIC,
+                                  GTK_POLICY_AUTOMATIC);
+
+  gtk_widget_set_size_request (listbox, DLG_LISTBOX_WIDTH, DLG_LISTBOX_HEIGHT);
+  gtk_box_pack_start (GTK_BOX (vbox), listbox, TRUE, TRUE, 0);
+
+  list = dlg->selector_list = gtk_list_store_new (2,
+                                                  G_TYPE_STRING,
+                                                  G_TYPE_POINTER);
+  listview = gtk_tree_view_new_with_model (GTK_TREE_MODEL (list));
+  gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (listview), FALSE);
+
+  gtk_container_add (GTK_CONTAINER (listbox), listview);
+  gtk_widget_show (listbox);
+  dlg->selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (listview));
+  gtk_tree_selection_set_mode (dlg->selection, GTK_SELECTION_BROWSE);
+  gtk_widget_show (listview);
+  g_signal_connect (dlg->selection, "changed",
+                    G_CALLBACK (dlg_selector_list_item_callback),
+                    NULL);
+
+  renderer = gtk_cell_renderer_text_new ();
+
+  /* Note: the title isn't shown, so it doesn't need to be translated. */
+  column = gtk_tree_view_column_new_with_attributes ("GFlare", renderer,
+                                                      "text", 0,
+                                                      NULL);
+  gtk_tree_view_append_column (GTK_TREE_VIEW (listview), column);
+
+  dlg_selector_setup_listbox ();
+
+  /*
+   *    The buttons for the possible listbox operations
+   */
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
+  gtk_widget_show (hbox);
+
+  for (i = 0; i < G_N_ELEMENTS (buttons); i++)
+    {
+      button = gtk_button_new_with_mnemonic (gettext (buttons[i].label));
+      gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
+      gtk_widget_show (button);
+
+      g_signal_connect (button, "clicked",
+                        buttons[i].callback,
+                        button);
+    }
+
+  gtk_widget_show (vbox);
+
+  gtk_notebook_append_page (GTK_NOTEBOOK (notebook), vbox,
+                            gtk_label_new_with_mnemonic (_("S_elector")));
+  gtk_widget_show (vbox);
+}
+
+/*
+ *      Set up selector's listbox, according to gflares_list
+ */
+static void
+dlg_selector_setup_listbox (void)
+{
+  GList  *list;
+  GFlare *gflare;
+  gint    n;
+
+  list = gflares_list;
+  n = 0;
+
+  while (list)
+    {
+      GtkTreeIter   iter;
+
+      gflare = list->data;
+
+      /*
+        dlg->gflare should be valid (ie. not NULL) here.
+        */
+      gtk_list_store_append (dlg->selector_list, &iter);
+
+      gtk_list_store_set (dlg->selector_list, &iter,
+                          0, gflare->name,
+                          1, gflare,
+                          -1);
+      if (gflare == dlg->gflare)
+         gtk_tree_selection_select_iter (dlg->selection,
+                                         &iter);
+
+      list = list->next;
+      n++;
+    }
+}
+
+static void
+dlg_selector_list_item_callback (GtkTreeSelection *selection)
+{
+  GtkTreeIter iter;
+
+  if (gtk_tree_selection_get_selected (selection, NULL, &iter))
+    {
+      gtk_tree_model_get (GTK_TREE_MODEL (dlg->selector_list), &iter,
+                          1, &dlg->gflare, -1);
+    }
+
+  dlg_preview_update ();
+}
+
+/*
+ *      "New" button in Selector page
+ */
+static void
+dlg_selector_new_callback (GtkWidget *widget,
+                           gpointer   data)
+{
+  GtkWidget *query_box;
+
+  query_box = gimp_query_string_box (_("New Gradient Flare"),
+                                     gtk_widget_get_toplevel (widget),
+                                     gimp_standard_help_func, PLUG_IN_PROC,
+                                     _("Enter a name for the new GFlare"),
+                                     _("Unnamed"),
+                                     NULL, NULL,
+                                     dlg_selector_new_ok_callback, dlg);
+  gtk_widget_show (query_box);
+}
+
+static void
+dlg_selector_new_ok_callback (GtkWidget   *widget,
+                              const gchar *new_name,
+                              gpointer     data)
+{
+  GFlare      *gflare;
+  GtkTreeIter  iter;
+  gint         pos;
+
+  g_return_if_fail (new_name != NULL);
+
+  if (gflares_list_lookup (new_name))
+    {
+      g_message (_("The name '%s' is used already!"), new_name);
+      return;
+    }
+
+  gflare = gflare_new_with_default (new_name);
+
+  pos = gflares_list_insert (gflare);
+
+  gtk_list_store_insert (dlg->selector_list, &iter, pos);
+  gtk_list_store_set (dlg->selector_list, &iter,
+                      0, gflare->name,
+                      1, gflare,
+                      -1);
+  gtk_tree_selection_select_iter (dlg->selection, &iter);
+
+  dlg->gflare = gflare;
+  dlg_preview_update ();
+}
+
+/*
+ *  "Edit" button in Selector page
+ */
+static void
+dlg_selector_edit_callback (GtkWidget *widget,
+                            gpointer   data)
+{
+  preview_render_end (dlg->preview);
+  gtk_widget_set_sensitive (dlg->shell, FALSE);
+  ed_run (GTK_WINDOW (dlg->shell),
+          dlg->gflare, dlg_selector_edit_done_callback, NULL);
+}
+
+static void
+dlg_selector_edit_done_callback (gint     updated,
+                                 gpointer data)
+{
+  gtk_widget_set_sensitive (dlg->shell, TRUE);
+  if (updated)
+    {
+      gflare_save (dlg->gflare);
+    }
+  dlg_preview_update ();
+}
+
+/*
+ *  "Copy" button in Selector page
+ */
+static void
+dlg_selector_copy_callback (GtkWidget *widget,
+                            gpointer   data)
+{
+  GtkWidget *query_box;
+  gchar     *name;
+
+  name = g_strdup_printf ("%s copy", dlg->gflare->name);
+
+  query_box = gimp_query_string_box (_("Copy Gradient Flare"),
+                                     gtk_widget_get_toplevel (widget),
+                                     gimp_standard_help_func, PLUG_IN_PROC,
+                                     _("Enter a name for the copied GFlare"),
+                                     name,
+                                     NULL, NULL,
+                                     dlg_selector_copy_ok_callback, dlg);
+  g_free (name);
+
+  gtk_widget_show (query_box);
+}
+
+static void
+dlg_selector_copy_ok_callback (GtkWidget   *widget,
+                               const gchar *copy_name,
+                               gpointer     data)
+{
+  GFlare      *gflare;
+  GtkTreeIter  iter;
+  gint         pos;
+
+  g_return_if_fail (copy_name != NULL);
+
+  if (gflares_list_lookup (copy_name))
+    {
+      g_warning (_("The name '%s' is used already!"), copy_name);
+      return;
+    }
+
+  gflare = gflare_dup (dlg->gflare, copy_name);
+
+  pos = gflares_list_insert (gflare);
+  gtk_list_store_insert (dlg->selector_list, &iter, pos);
+  gtk_list_store_set (dlg->selector_list, &iter,
+                      0, gflare->name,
+                      1, gflare,
+                      -1);
+  gtk_tree_selection_select_iter (dlg->selection, &iter);
+
+  dlg->gflare = gflare;
+  gflare_save (dlg->gflare);
+  dlg_preview_update ();
+}
+
+/*
+ *      "Delete" button in Selector page
+ */
+static void
+dlg_selector_delete_callback (GtkWidget *widget,
+                              gpointer   data)
+{
+  GtkWidget *dialog;
+  gchar     *str;
+
+  if (num_gflares <= 1)
+    {
+      g_message (_("Cannot delete!! There must be at least one GFlare."));
+      return;
+    }
+
+  gtk_widget_set_sensitive (dlg->shell, FALSE);
+
+  str = g_strdup_printf (_("Are you sure you want to delete "
+                           "\"%s\" from the list and from disk?"),
+                         dlg->gflare->name);
+
+  dialog = gimp_query_boolean_box (_("Delete Gradient Flare"),
+                                   dlg->shell,
+                                   gimp_standard_help_func, PLUG_IN_PROC,
+                                   GIMP_ICON_DIALOG_QUESTION,
+                                   str,
+                                   _("_Delete"), _("_Cancel"),
+                                   NULL, NULL,
+                                   dlg_selector_do_delete_callback,
+                                   NULL);
+
+  g_free (str);
+
+  gtk_widget_show (dialog);
+}
+
+static void
+dlg_selector_do_delete_callback (GtkWidget *widget,
+                                 gboolean   delete,
+                                 gpointer   data)
+{
+  GFlare      *old_gflare;
+  GList       *tmp;
+  gint         i, new_i;
+  GtkTreeIter  iter;
+
+  gtk_widget_set_sensitive (dlg->shell, TRUE);
+
+  if (!delete)
+    return;
+
+  i = gflares_list_index (dlg->gflare);
+
+  if (i >= 0)
+    {
+      /* Remove current gflare from gflares_list and free it */
+      old_gflare = dlg->gflare;
+      gflares_list_remove (dlg->gflare);
+      dlg->gflare = NULL;
+
+      /* Remove from listbox */
+      if (!gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (dlg->selector_list),
+                                          &iter, NULL, i))
+        {
+          g_warning ("Unsynchronized lists. Bad things will happen!");
+          return;
+        }
+      gtk_list_store_remove (dlg->selector_list, &iter);
+
+      /* Calculate new position of gflare and select it */
+      new_i = (i < num_gflares) ? i : num_gflares - 1;
+      if ((tmp = g_list_nth (gflares_list, new_i)))
+          dlg->gflare = tmp->data;
+      if (!gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (dlg->selector_list),
+                                          &iter, NULL, i))
+        {
+          g_warning ("Unsynchronized lists. Bad things will happen!");
+          return;
+        }
+       gtk_tree_selection_select_iter (dlg->selection,
+                                       &iter);
+
+      /* Delete old one from disk and memory */
+      if (old_gflare->filename)
+        g_unlink (old_gflare->filename);
+
+      gflare_free (old_gflare);
+
+      /* Update */
+      dlg_preview_update ();
+    }
+  else
+    {
+      g_warning (_("not found %s in gflares_list"), dlg->gflare->name);
+    }
+}
+
+/*************************************************************************/
+/**                                                                     **/
+/**                     GFlare Editor                                   **/
+/**                     +++ ed                                          **/
+/**                                                                     **/
+/*************************************************************************/
+
+/*
+        This is gflare editor dialog, one which opens by clicking
+        "Edit" button on the selector page in the main dialog.
+ */
+
+static void
+ed_run (GtkWindow            *parent,
+        GFlare               *target_gflare,
+        GFlareEditorCallback  callback,
+        gpointer              calldata)
+{
+  GtkWidget *shell;
+  GtkWidget *hbox;
+  GtkWidget *frame;
+  GtkWidget *abox;
+  GtkWidget *notebook;
+
+  if (!ed)
+    ed = g_new0 (GFlareEditor, 1);
+  ed->init          = TRUE;
+  ed->run           = FALSE;
+  ed->target_gflare = target_gflare;
+  ed->gflare        = gflare_dup (target_gflare, target_gflare->name);
+  ed->callback      = callback;
+  ed->calldata      = calldata;
+
+  /*
+   *    Dialog Shell
+   */
+  ed->shell =
+    shell = gimp_dialog_new (_("Gradient Flare Editor"), PLUG_IN_ROLE,
+                             GTK_WIDGET (parent), 0,
+                             gimp_standard_help_func, PLUG_IN_PROC,
+
+                             _("_Rescan Gradients"), RESPONSE_RESCAN,
+                             _("_Cancel"),           GTK_RESPONSE_CANCEL,
+                             _("_OK"),               GTK_RESPONSE_OK,
+
+                             NULL);
+
+  gtk_dialog_set_alternative_button_order (GTK_DIALOG (shell),
+                                           RESPONSE_RESCAN,
+                                           GTK_RESPONSE_OK,
+                                           GTK_RESPONSE_CANCEL,
+                                           -1);
+
+  g_signal_connect (shell, "response",
+                    G_CALLBACK (ed_response),
+                    ed);
+  g_signal_connect (shell, "destroy",
+                    G_CALLBACK (ed_destroy_callback),
+                    ed);
+
+  /*
+   *    main hbox
+   */
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (hbox), 12);
+  gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (shell))),
+                      hbox, FALSE, FALSE, 0);
+  gtk_widget_show (hbox);
+
+  /*
+   *    Preview
+   */
+
+  abox = gtk_alignment_new (0.0, 0.0, 0.0, 0.0);
+  gtk_box_pack_start (GTK_BOX (hbox), abox, FALSE, FALSE, 0);
+  gtk_widget_show (abox);
+
+  frame = gtk_frame_new (NULL);
+  gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
+  gtk_container_add (GTK_CONTAINER (abox), frame);
+  gtk_widget_show (frame);
+
+  ed->preview = preview_new (ED_PREVIEW_WIDTH, ED_PREVIEW_HEIGHT,
+                             ed_preview_init_func, NULL,
+                             ed_preview_render_func, NULL,
+                             ed_preview_deinit_func, NULL);
+  gtk_widget_set_events (GTK_WIDGET (ed->preview->widget), DLG_PREVIEW_MASK);
+  gtk_container_add (GTK_CONTAINER (frame), ed->preview->widget);
+  g_signal_connect (ed->preview->widget, "event",
+                    G_CALLBACK (dlg_preview_handle_event),
+                    NULL);
+  ed_preview_calc_window ();
+
+  /*
+   *    Notebook
+   */
+  notebook = ed->notebook = gtk_notebook_new ();
+  gtk_notebook_set_tab_pos (GTK_NOTEBOOK (notebook), GTK_POS_TOP);
+  gtk_box_pack_start (GTK_BOX (hbox), notebook, TRUE, TRUE, 0);
+  gtk_widget_show (notebook);
+
+  ed_make_page_general (ed, notebook);
+  ed_make_page_glow (ed, notebook);
+  ed_make_page_rays (ed, notebook);
+  ed_make_page_sflare (ed, notebook);
+
+  gtk_widget_show (shell);
+
+  ed->init = FALSE;
+  ed_preview_update ();
+}
+
+static void
+ed_destroy_callback (GtkWidget    *widget,
+                     GFlareEditor *ed)
+{
+  preview_free (ed->preview);
+  gflare_free (ed->gflare);
+  if (ed->callback)
+    (*ed->callback) (ed->run, ed->calldata);
+}
+
+static void
+ed_response (GtkWidget    *widget,
+             gint          response_id,
+             GFlareEditor *ed)
+{
+  switch (response_id)
+    {
+    case RESPONSE_RESCAN:
+      ed->init = TRUE;
+      gradient_menu_rescan ();
+      ed->init = FALSE;
+      ed_preview_update ();
+      gtk_widget_queue_draw (ed->notebook);
+      break;
+
+    case GTK_RESPONSE_OK:
+      ed->run = TRUE;
+      gflare_copy (ed->target_gflare, ed->gflare);
+      gtk_widget_destroy (ed->shell);
+      break;
+
+    default:
+      gtk_widget_destroy (ed->shell);
+      break;
+    }
+}
+
+static void
+ed_make_page_general (GFlareEditor *ed,
+                      GtkWidget    *notebook)
+{
+  GFlare    *gflare = ed->gflare;
+  GtkWidget *vbox;
+  GtkWidget *frame;
+  GtkWidget *table;
+  GtkWidget *combo;
+  GtkObject *adj;
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
+
+  /*  Glow  */
+
+  frame = gimp_frame_new (_("Glow Paint Options"));
+  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (2, 3, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+  gtk_widget_show (table);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
+                              _("Opacity:"), SCALE_WIDTH, 6,
+                              gflare->glow_opacity, 0.0, 100.0, 1.0, 10.0, 1,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->glow_opacity);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  combo = ed_mode_menu_new (&gflare->glow_mode);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
+                             _("Paint mode:"), 0.0, 0.5, combo, 1, FALSE);
+
+  /*  Rays  */
+
+  frame = gimp_frame_new (_("Rays Paint Options"));
+  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (2, 3, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+  gtk_widget_show (table);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
+                              _("Opacity:"), SCALE_WIDTH, 6,
+                              gflare->rays_opacity, 0.0, 100.0, 1.0, 10.0, 1,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->rays_opacity);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  combo = ed_mode_menu_new (&gflare->rays_mode);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
+                             _("Paint mode:"), 0.0, 0.5, combo, 1, FALSE);
+
+  /*  Rays  */
+
+  frame = gimp_frame_new (_("Second Flares Paint Options"));
+  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (2, 3, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+  gtk_widget_show (table);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
+                              _("Opacity:"), SCALE_WIDTH, 6,
+                              gflare->sflare_opacity, 0.0, 100.0, 1.0, 10.0, 1,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->sflare_opacity);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  combo = ed_mode_menu_new (&gflare->sflare_mode);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
+                             _("Paint mode:"), 0.0, 0.5, combo, 1, FALSE);
+
+  gtk_notebook_append_page (GTK_NOTEBOOK (notebook), vbox,
+                            gtk_label_new_with_mnemonic (_("_General")));
+  g_signal_connect (vbox, "map",
+                    G_CALLBACK (ed_page_map_callback),
+                    (gpointer) PAGE_GENERAL);
+  gtk_widget_show (vbox);
+}
+
+static void
+ed_make_page_glow (GFlareEditor *ed,
+                   GtkWidget    *notebook)
+{
+  GFlare       *gflare = ed->gflare;
+  GradientMenu *gm;
+  GtkWidget    *vbox;
+  GtkWidget    *frame;
+  GtkWidget    *table;
+  GtkObject    *adj;
+  gint          row;
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
+
+  /*
+   *  Gradient Menus
+   */
+
+  frame = gimp_frame_new (_("Gradients"));
+  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (3, 3, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+
+  gm = gradient_menu_new ((GradientMenuCallback) &ed_gradient_menu_callback,
+                          gflare->glow_radial, gflare->glow_radial);
+  ed_put_gradient_menu (table, 0, 0, _("Radial gradient:"), gm);
+
+  gm = gradient_menu_new ((GradientMenuCallback) &ed_gradient_menu_callback,
+                          gflare->glow_angular, gflare->glow_angular);
+  ed_put_gradient_menu (table, 0, 1, _("Angular gradient:"), gm);
+
+  gm = gradient_menu_new ((GradientMenuCallback) &ed_gradient_menu_callback,
+                          gflare->glow_angular_size, gflare->glow_angular_size);
+  ed_put_gradient_menu (table, 0, 2, _("Angular size gradient:"), gm);
+
+  gtk_widget_show (table);
+
+  /*
+   *  Scales
+   */
+
+  frame = gimp_frame_new (_("Parameters"));
+  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (3, 3, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+
+  row = 0;
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Size (%):"), SCALE_WIDTH, 6,
+                              gflare->glow_size, 0.0, 200.0, 1.0, 10.0, 1,
+                              FALSE, 0, G_MAXINT,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->glow_size);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Rotation:"), SCALE_WIDTH, 6,
+                              gflare->glow_rotation, -180.0, 180.0, 1.0, 15.0, 1,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->glow_rotation);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Hue rotation:"), SCALE_WIDTH, 6,
+                              gflare->glow_hue, -180.0, 180.0, 1.0, 15.0, 1,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->glow_hue);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  gtk_widget_show (table);
+
+  gtk_notebook_append_page (GTK_NOTEBOOK (notebook), vbox,
+                            gtk_label_new_with_mnemonic (_("G_low")));
+  g_signal_connect (vbox, "map",
+                    G_CALLBACK (ed_page_map_callback),
+                    (gpointer) PAGE_GLOW);
+  gtk_widget_show (vbox);
+}
+
+static void
+ed_make_page_rays (GFlareEditor *ed,
+                   GtkWidget    *notebook)
+{
+  GFlare       *gflare = ed->gflare;
+  GradientMenu *gm;
+  GtkWidget    *vbox;
+  GtkWidget    *frame;
+  GtkWidget    *table;
+  GtkObject    *adj;
+  gint          row;
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
+
+  /*
+   *  Gradient Menus
+   */
+
+  frame = gimp_frame_new (_("Gradients"));
+  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (3, 3, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+
+  row = 0;
+
+  gm = gradient_menu_new ((GradientMenuCallback) &ed_gradient_menu_callback,
+                          gflare->rays_radial, gflare->rays_radial);
+  ed_put_gradient_menu (table, 0, row++, _("Radial gradient:"), gm);
+
+  gm = gradient_menu_new ((GradientMenuCallback) &ed_gradient_menu_callback,
+                          gflare->rays_angular, gflare->rays_angular);
+  ed_put_gradient_menu (table, 0, row++, _("Angular gradient:"), gm);
+
+  gm = gradient_menu_new ((GradientMenuCallback) &ed_gradient_menu_callback,
+                          gflare->rays_angular_size, gflare->rays_angular_size);
+  ed_put_gradient_menu (table, 0, row++, _("Angular size gradient:"), gm);
+
+  gtk_widget_show (table);
+
+  /*
+   *    Scales
+   */
+
+  frame = gimp_frame_new (_("Parameters"));
+  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (5, 3, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+
+  row = 0;
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Size (%):"), SCALE_WIDTH, 6,
+                              gflare->rays_size, 0.0, 200.0, 1.0, 10.0, 1,
+                              FALSE, 0, G_MAXINT,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->rays_size);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Rotation:"), SCALE_WIDTH, 6,
+                              gflare->rays_rotation,
+                              -180.0, 180.0, 1.0, 15.0, 1,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->rays_rotation);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Hue rotation:"), SCALE_WIDTH, 6,
+                              gflare->rays_hue, -180.0, 180.0, 1.0, 15.0, 1,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->rays_hue);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("# of Spikes:"), SCALE_WIDTH, 6,
+                              gflare->rays_nspikes, 1, 300, 1.0, 10.0, 0,
+                              FALSE, 0, G_MAXINT,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_int_adjustment_update),
+                    &gflare->rays_nspikes);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Spike thickness:"), SCALE_WIDTH, 6,
+                              gflare->rays_thickness, 1.0, 100.0, 1.0, 10.0, 1,
+                              FALSE, 0, GIMP_MAX_IMAGE_SIZE,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->rays_thickness);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  gtk_widget_show (table);
+
+  gtk_notebook_append_page (GTK_NOTEBOOK (notebook), vbox,
+                            gtk_label_new_with_mnemonic (_("_Rays")));
+  g_signal_connect (vbox, "map",
+                    G_CALLBACK (ed_page_map_callback),
+                    (gpointer) PAGE_RAYS);
+  gtk_widget_show (vbox);
+}
+
+static void
+ed_make_page_sflare (GFlareEditor *ed,
+                     GtkWidget    *notebook)
+{
+  GFlare       *gflare = ed->gflare;
+  GradientMenu *gm;
+  GtkWidget    *vbox;
+  GtkWidget    *table;
+  GtkWidget    *frame;
+  GtkWidget    *shape_vbox;
+  GSList       *shape_group = NULL;
+  GtkWidget    *polygon_hbox;
+  GtkWidget    *seed_hbox;
+  GtkWidget    *toggle;
+  GtkWidget    *label;
+  GtkWidget    *seed;
+  GtkWidget    *entry;
+  GtkObject    *adj;
+  gchar         buf[256];
+  gint          row;
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
+
+  /*
+   *  Gradient Menus
+   */
+
+  frame = gimp_frame_new (_("Gradients"));
+  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (3, 3, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+
+  gm = gradient_menu_new ((GradientMenuCallback) &ed_gradient_menu_callback,
+                          gflare->sflare_radial, gflare->sflare_radial);
+  ed_put_gradient_menu (table, 0, 0, _("Radial gradient:"), gm);
+
+  gm = gradient_menu_new ((GradientMenuCallback) &ed_gradient_menu_callback,
+                          gflare->sflare_sizefac, gflare->sflare_sizefac);
+  ed_put_gradient_menu (table, 0, 1, _("Size factor gradient:"), gm);
+
+  gm = gradient_menu_new ((GradientMenuCallback) &ed_gradient_menu_callback,
+                          gflare->sflare_probability, gflare->sflare_probability);
+  ed_put_gradient_menu (table, 0, 2, _("Probability gradient:"), gm);
+
+  gtk_widget_show (table);
+
+  /*
+   *    Scales
+   */
+
+  frame = gimp_frame_new (_("Parameters"));
+  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (3, 3, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+
+  row = 0;
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Size (%):"), SCALE_WIDTH, 6,
+                              gflare->sflare_size, 0.0, 200.0, 1.0, 10.0, 1,
+                              FALSE, 0, G_MAXINT,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->sflare_size);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Rotation:"), SCALE_WIDTH, 6,
+                              gflare->sflare_rotation,
+                              -180.0, 180.0, 1.0, 15.0, 1,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->sflare_rotation);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  adj = gimp_scale_entry_new (GTK_TABLE (table), 0, row++,
+                              _("Hue rotation:"), SCALE_WIDTH, 6,
+                              gflare->sflare_hue, -180.0, 180.0, 1.0, 15.0, 1,
+                              TRUE, 0, 0,
+                              NULL, NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &gflare->sflare_hue);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  gtk_widget_show (table);
+
+  /*
+   *    Shape Radio Button Frame
+   */
+
+  frame = gimp_frame_new (_("Shape of Second Flares"));
+  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  shape_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
+  gtk_container_add (GTK_CONTAINER (frame), shape_vbox);
+  gtk_widget_show (shape_vbox);
+
+  toggle = gtk_radio_button_new_with_label (shape_group, _("Circle"));
+  shape_group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (toggle));
+  g_object_set_data (G_OBJECT (toggle), "gimp-item-data",
+                     GINT_TO_POINTER (GF_CIRCLE));
+  g_signal_connect (toggle, "toggled",
+                    G_CALLBACK (ed_shape_radio_callback),
+                    &gflare->sflare_shape);
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
+                                gflare->sflare_shape == GF_CIRCLE);
+  gtk_box_pack_start (GTK_BOX (shape_vbox), toggle, FALSE, FALSE, 0);
+  gtk_widget_show (toggle);
+
+  polygon_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_box_pack_start (GTK_BOX (shape_vbox), polygon_hbox, FALSE, FALSE, 0);
+  gtk_widget_show (polygon_hbox);
+
+  toggle = ed->polygon_toggle =
+    gtk_radio_button_new_with_label (shape_group, _("Polygon"));
+  shape_group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (toggle));
+  g_object_set_data (G_OBJECT (toggle), "gimp-item-data",
+                     GINT_TO_POINTER (GF_POLYGON));
+  g_signal_connect (toggle, "toggled",
+                    G_CALLBACK (ed_shape_radio_callback),
+                    &gflare->sflare_shape);
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
+                                gflare->sflare_shape == GF_POLYGON);
+  gtk_box_pack_start (GTK_BOX (polygon_hbox), toggle, FALSE, FALSE, 0);
+  gtk_widget_show (toggle);
+
+  entry = ed->polygon_entry = gtk_entry_new ();
+  gtk_entry_set_width_chars (GTK_ENTRY (entry), 4);
+  g_snprintf (buf, sizeof (buf), "%d", gflare->sflare_nverts);
+  gtk_entry_set_text (GTK_ENTRY (entry), buf);
+  g_signal_connect (entry, "changed",
+                    G_CALLBACK (ed_ientry_callback),
+                    &gflare->sflare_nverts);
+  gtk_box_pack_start (GTK_BOX (polygon_hbox), entry, FALSE, FALSE, 0);
+  gtk_widget_show (entry);
+
+  g_object_bind_property (toggle, "active",
+                          entry,  "sensitive",
+                          G_BINDING_SYNC_CREATE);
+
+  /*
+   *    Random Seed Entry
+   */
+
+  seed_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_box_pack_start (GTK_BOX (vbox), seed_hbox, FALSE, FALSE, 0);
+  gtk_widget_show (seed_hbox);
+
+  label = gtk_label_new (_("Random seed:"));
+  gtk_label_set_xalign (GTK_LABEL (label), 0.0);
+  gtk_box_pack_start (GTK_BOX (seed_hbox), label, FALSE, FALSE, 0);
+  gtk_widget_show (label);
+
+  seed = gimp_random_seed_new (&gflare->sflare_seed, &gflare->random_seed);
+  gtk_box_pack_start (GTK_BOX (seed_hbox), seed, FALSE, TRUE, 0);
+  gtk_widget_show (seed);
+
+  g_signal_connect (GIMP_RANDOM_SEED_SPINBUTTON_ADJ (seed), "value-changed",
+                    G_CALLBACK (ed_preview_update),
+                    NULL);
+
+  gtk_notebook_append_page (GTK_NOTEBOOK (notebook), vbox,
+                            gtk_label_new_with_mnemonic (_("_Second Flares")));
+  g_signal_connect (vbox, "map",
+                    G_CALLBACK (ed_page_map_callback),
+                    (gpointer) PAGE_SFLARE);
+  gtk_widget_show (vbox);
+}
+
+GtkWidget *
+ed_mode_menu_new (GFlareMode *mode_var)
+{
+  GtkWidget *combo = gimp_int_combo_box_new_array (GF_NUM_MODES,
+                                                   gflare_menu_modes);
+
+  gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), *mode_var,
+                              G_CALLBACK (ed_mode_menu_callback),
+                              mode_var);
+
+  return combo;
+}
+
+/*
+  puts gradient menu with caption into table
+  occupies 1 row and 3 cols in table
+ */
+static void
+ed_put_gradient_menu (GtkWidget    *table,
+                      gint          x,
+                      gint          y,
+                      const gchar  *caption,
+                      GradientMenu *gm)
+{
+  GtkWidget *label;
+
+  label = gtk_label_new (caption);
+  gtk_label_set_xalign (GTK_LABEL (label), 1.0);
+  gtk_widget_show (label);
+
+  gtk_table_attach (GTK_TABLE (table), label,
+                    x    , x + 1, y, y + 1,
+                    GTK_FILL, 0, 0, 0);
+  gtk_table_attach (GTK_TABLE (table), gm->preview,
+                    x + 1, x + 2, y, y + 1,
+                    0, 0, 0, 0);
+  gtk_table_attach (GTK_TABLE (table), gm->combo,
+                    x + 2, x + 3, y, y + 1,
+                    0, 0, 0, 0);
+}
+
+static void
+ed_mode_menu_callback (GtkWidget *widget,
+                       gpointer   data)
+{
+  gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), (gint *) data);
+
+  ed_preview_update ();
+}
+
+static void
+ed_gradient_menu_callback (const gchar *gradient_name,
+                           gpointer     data)
+{
+  gchar *dest_string = data;
+
+  /* @GRADIENT_NAME */
+  gradient_name_copy (dest_string, gradient_name);
+  ed_preview_update ();
+}
+
+static void
+ed_shape_radio_callback (GtkWidget *widget,
+                         gpointer   data)
+{
+  gimp_radio_button_update (widget, data);
+
+  ed_preview_update ();
+}
+
+static void
+ed_ientry_callback (GtkWidget *widget,
+                    gpointer   data)
+{
+  gint new_val;
+
+  new_val = atoi (gtk_entry_get_text (GTK_ENTRY (widget)));
+  *(gint *)data = new_val;
+
+  ed_preview_update ();
+}
+
+/*
+  NOTE: This is hack, because this code depends on internal "map"
+  signal of changing pages of gtknotebook.
+ */
+static void
+ed_page_map_callback (GtkWidget *widget,
+                      gpointer   data)
+{
+  gint page_num = GPOINTER_TO_INT (data);
+
+  DEBUG_PRINT(("ed_page_map_callback\n"));
+
+  ed->cur_page = page_num;
+  ed_preview_update ();
+}
+
+
+static void
+ed_preview_update (void)
+{
+  if (ed->init)
+    return;
+
+  ed->init_params_done = FALSE;
+  preview_render_start (ed->preview);
+}
+
+static gint
+ed_preview_init_func (Preview *preview, gpointer data)
+{
+  int   type = 0;
+
+  if (ed->init_params_done == FALSE)
+    {
+      switch (ed->cur_page)
+        {
+        case PAGE_GENERAL:
+          type = (CALC_GLOW | CALC_RAYS | CALC_SFLARE);
+          break;
+        case PAGE_GLOW:
+          type = CALC_GLOW;
+          break;
+        case PAGE_RAYS:
+          type = CALC_RAYS;
+          break;
+        case PAGE_SFLARE:
+          type = CALC_SFLARE;
+          break;
+        default:
+          g_warning ("ed_preview_edit_func: bad page");
+          break;
+        }
+      calc_init_params (ed->gflare, type,
+                        ED_PREVIEW_WIDTH/2, ED_PREVIEW_HEIGHT/2,
+                        ED_PREVIEW_WIDTH/2, 0.0, 0.0,
+                        pvals.vangle, pvals.vlength);
+
+      ed->init_params_done = TRUE;
+      return TRUE;
+    }
+  return calc_init_progress ();
+}
+
+static void
+ed_preview_deinit_func (Preview *preview, gpointer data)
+{
+  if (ed->init_params_done)
+    {
+      calc_deinit ();
+      ed->init_params_done = FALSE;
+    }
+}
+
+static void
+ed_preview_render_func (Preview *preview,
+                        guchar  *buffer,
+                        gint     y,
+                        gpointer data)
+{
+  switch (ed->cur_page)
+    {
+    case PAGE_GENERAL:
+      ed_preview_render_general (buffer, y);
+      break;
+    case PAGE_GLOW:
+      ed_preview_render_glow (buffer, y);
+      break;
+    case PAGE_RAYS:
+      ed_preview_render_rays (buffer, y);
+      break;
+    case PAGE_SFLARE:
+      ed_preview_render_sflare (buffer, y);
+      break;
+    default:
+      g_warning ("hmm, bad page in ed_preview_render_func ()");
+      break;
+    }
+}
+
+static void
+ed_preview_render_general (guchar *buffer, gint y)
+{
+  int           x, i;
+  guchar        gflare_pix[4];
+  static guchar src_pix[4] = {0, 0, 0, OPAQUE};
+  int           gflare_a;
+
+  for (x = 0; x < ED_PREVIEW_WIDTH; x++)
+    {
+      calc_gflare_pix (gflare_pix, x, y, src_pix);
+      gflare_a = gflare_pix[3];
+
+      for (i = 0; i < 3; i++)
+        {
+          *buffer++ = gflare_pix[i] * gflare_a / 255;
+        }
+    }
+}
+
+static void
+ed_preview_render_glow (guchar *buffer, gint y)
+{
+  int           x, i;
+  guchar        pix[4];
+
+  for (x = 0; x < ED_PREVIEW_WIDTH; x++)
+    {
+      calc_glow_pix (pix, x, y);
+      for (i = 0; i < 3; i++)
+        *buffer++ = pix[i] * pix[3] / 255;
+    }
+}
+
+static void
+ed_preview_render_rays (guchar *buffer, gint y)
+{
+  int           x, i;
+  guchar        pix[4];
+
+  for (x = 0; x < ED_PREVIEW_WIDTH; x++)
+    {
+      calc_rays_pix (pix, x, y);
+      for (i = 0; i < 3; i++)
+        *buffer++ = pix[i] * pix[3] / 255;
+    }
+}
+
+static void
+ed_preview_render_sflare (guchar *buffer, gint y)
+{
+  int           x, i;
+  guchar        pix[4];
+  static guchar src_pix[4] = {0, 0, 0, OPAQUE};
+
+  for (x = 0; x < ED_PREVIEW_WIDTH; x++)
+    {
+      calc_sflare_pix (pix, x, y, src_pix);
+      for (i = 0; i < 3; i++)
+        *buffer++ = pix[i] * pix[3] / 255;
+    }
+}
+
+/*************************************************************************/
+/**                                                                     **/
+/**                     +++ Preview                                     **/
+/**                                                                     **/
+/*************************************************************************/
+
+/*
+        this is generic preview routines.
+ */
+
+
+/*
+    Routines to render the preview in background
+ */
+static Preview *
+preview_new (gint                  width,
+             gint                  height,
+             PreviewInitFunc       init_func,
+             gpointer              init_data,
+             PreviewRenderFunc     render_func,
+             gpointer              render_data,
+             PreviewDeinitFunc     deinit_func,
+             gpointer              deinit_data)
+{
+  Preview *preview;
+
+  preview = g_new0 (Preview, 1);
+
+  preview->widget = gimp_preview_area_new ();
+  gtk_widget_set_size_request (preview->widget, width, height);
+  gtk_widget_show (preview->widget);
+
+  preview->width           = width;
+  preview->height          = height;
+  preview->init_func       = init_func;
+  preview->init_data       = init_data;
+  preview->render_func     = render_func;
+  preview->render_data     = render_data;
+  preview->deinit_func     = deinit_func;
+  preview->deinit_data     = deinit_data;
+  preview->idle_tag        = 0;
+  preview->buffer          = g_new (guchar, width * 3);
+  preview->full_image_buffer = g_new (guchar, width * height * 3);
+
+  return preview;
+}
+
+static void
+preview_free (Preview *preview)
+{
+  preview_render_end (preview);
+  /* not destroy preview->widget */
+  g_free (preview->buffer);
+  g_free (preview->full_image_buffer);
+  g_free (preview);
+}
+
+/*
+  Start rendering of the preview in background using an idle event.
+  If already started and not yet finished, stop it first.
+ */
+static void
+preview_render_start (Preview *preview)
+{
+  preview_render_end (preview);
+
+  preview->init_done = FALSE;
+  preview->current_y = 0;
+  preview->drawn_y = 0;
+  preview->timeout_tag = g_timeout_add (100,
+                                        (GSourceFunc) preview_render_start_2,
+                                        preview);
+}
+
+static gint
+preview_render_start_2 (Preview *preview)
+{
+  preview->timeout_tag = 0;
+  preview->idle_tag = g_idle_add ((GSourceFunc) preview_handle_idle, preview);
+  return FALSE;
+}
+
+static void
+preview_render_end (Preview *preview)
+{
+  if (preview->timeout_tag > 0)
+    {
+      g_source_remove (preview->timeout_tag);
+      preview->timeout_tag = 0;
+    }
+  if (preview->idle_tag > 0)
+    {
+      if (preview->deinit_func)
+        (*preview->deinit_func) (preview, preview->deinit_data);
+
+      g_source_remove (preview->idle_tag);
+      preview->idle_tag = 0;
+    }
+}
+
+/*
+  Handle an idle event.
+  Return FALSE if done, TRUE otherwise.
+ */
+static gboolean
+preview_handle_idle (Preview *preview)
+{
+  gboolean done = FALSE;
+
+  if (preview->init_done == FALSE)
+    {
+      if (preview->init_func &&
+          (*preview->init_func) (preview, preview->init_data))
+        return TRUE;
+
+      preview->init_done = TRUE;
+    }
+
+  if (preview->render_func)
+    (*preview->render_func) (preview, preview->buffer, preview->current_y,
+                             preview->render_data);
+  else
+    memset (preview->buffer, 0, preview->width * 3);
+
+  memcpy (preview->full_image_buffer + preview->width * 3 * preview->current_y,
+          preview->buffer,
+          preview->width * 3);
+
+  if (++preview->current_y >= preview->height)
+    done = TRUE;
+
+  if (done)
+    {
+      gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview->widget),
+                              0, 0, preview->width, preview->height,
+                              GIMP_RGB_IMAGE,
+                              preview->full_image_buffer,
+                              preview->width * 3);
+
+      preview->drawn_y = preview->current_y;
+      preview_render_end (preview);
+      return FALSE;
+    }
+
+  return TRUE;
+}
+
+/*
+  Convert RGBA to RGB with rendering gray check if needed.
+        (from nova.c)
+  input:  guchar src[4]         RGBA pixel
+  output: guchar dest[3]        RGB pixel
+ */
+
+static void
+preview_rgba_to_rgb (guchar *dest,
+                     gint    x,
+                     gint    y,
+                     guchar *src)
+{
+  gint src_a;
+  gint check;
+  gint b;
+
+  src_a = src[3];
+
+  if (src_a == OPAQUE)  /* full opaque */
+    {
+      for (b = 0; b < 3; b++)
+        dest[b] = src[b];
+    }
+  else
+    {
+      if ((x % (GIMP_CHECK_SIZE) < GIMP_CHECK_SIZE_SM) ^
+          (y % (GIMP_CHECK_SIZE) < GIMP_CHECK_SIZE_SM))
+        check = GIMP_CHECK_LIGHT * 255;
+      else
+        check = GIMP_CHECK_DARK * 255;
+
+      if (src_a == 0)   /* full transparent */
+        {
+          for (b = 0; b < 3; b++)
+            dest[b] = check;
+        }
+      else
+        {
+          for (b = 0; b < 3; b++)
+            dest[b] = (src[b] * src_a + check * (OPAQUE-src_a)) / OPAQUE;
+        }
+    }
+}
+
+/*************************************************************************/
+/**                                                                     **/
+/**                     +++ Gradient Menu                               **/
+/**                     +++ gm                                          **/
+/**                                                                     **/
+/*************************************************************************/
+
+static void
+gradient_menu_init (void)
+{
+  gm_gradient_get_list ();
+  gradient_menus = NULL;
+}
+
+static void
+gradient_menu_rescan (void)
+{
+  GList         *tmp;
+  GradientMenu  *gm;
+  GtkTreeModel  *model;
+
+  /* Detach and destroy menus first */
+  tmp = gradient_menus;
+  while (tmp)
+    {
+      gm  = tmp->data;
+      tmp = tmp->next;
+
+      model = gtk_combo_box_get_model (GTK_COMBO_BOX (gm->combo));
+      gtk_list_store_clear (GTK_LIST_STORE (model));
+    }
+
+  gm_gradient_get_list ();
+
+  tmp = gradient_menus;
+  while (tmp)
+    {
+      gm  = tmp->data;
+      tmp = tmp->next;
+
+      gm_gradient_combo_fill (gm, gm->gradient_name);
+    }
+}
+
+static GradientMenu *
+gradient_menu_new (GradientMenuCallback callback,
+                   gpointer             callback_data,
+                   const gchar         *default_gradient_name)
+{
+  GradientMenu *gm = g_new (GradientMenu, 1);
+
+  gm->callback = callback;
+  gm->callback_data = callback_data;
+
+  gm->preview = gimp_preview_area_new ();
+  gtk_widget_set_size_request (gm->preview,
+                               GM_PREVIEW_WIDTH, GM_PREVIEW_HEIGHT);
+
+  gm->combo = g_object_new (GIMP_TYPE_INT_COMBO_BOX, NULL);
+
+  g_signal_connect (gm->combo, "changed",
+                    G_CALLBACK (gm_gradient_combo_callback),
+                    gm);
+
+  gm_gradient_combo_fill (gm, default_gradient_name);
+
+  gtk_widget_show (gm->preview);
+  gtk_widget_show (gm->combo);
+
+  g_signal_connect (gm->combo, "destroy",
+                    G_CALLBACK (gm_combo_destroy_callback),
+                    gm);
+
+  gradient_menus = g_list_append (gradient_menus, gm);
+
+  return gm;
+}
+
+/* Local Functions */
+
+static void
+gm_gradient_get_list (void)
+{
+  int   i;
+
+  if (gradient_names)
+    {
+      for (i = 0; i < num_gradient_names; i++)
+        g_free (gradient_names[i]);
+      g_free (gradient_names);
+    }
+
+  gradient_cache_flush ();      /* to make sure */
+  gradient_names = gradient_get_list (&num_gradient_names);
+}
+
+static void
+gm_gradient_combo_fill (GradientMenu *gm,
+                        const gchar  *default_gradient)
+{
+  gint active = 0;
+  gint i;
+
+  for (i = 0; i < num_gradient_names; i++)
+    {
+      const gchar *name = gradient_names[i];
+
+      if (strcmp (name, default_gradient) == 0)
+        active = i;
+
+      gimp_int_combo_box_append (GIMP_INT_COMBO_BOX (gm->combo),
+                                 GIMP_INT_STORE_VALUE, i,
+                                 GIMP_INT_STORE_LABEL, name,
+                                 -1);
+    }
+
+  gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (gm->combo), active);
+}
+
+static void
+gm_gradient_combo_callback (GtkWidget *widget,
+                            gpointer   data)
+{
+  GradientMenu *gm = data;
+  const gchar  *gradient_name;
+  gint          index;
+
+  if (! gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &index) ||
+      index < 0 ||
+      index >= num_gradient_names)
+    return;
+
+  gradient_name = gradient_names[index];
+
+  DEBUG_PRINT(("gm_combo_callback\n"));
+
+  gradient_name_copy (gm->gradient_name, gradient_name);
+
+  gm_preview_draw (gm->preview, gradient_name);
+
+  if (gm->callback)
+    (* gm->callback) (gradient_name, gm->callback_data);
+}
+
+static void
+gm_preview_draw (GtkWidget   *preview,
+                 const gchar *gradient_name)
+{
+  guchar      values[GM_PREVIEW_WIDTH][4];
+  gint        nvalues = GM_PREVIEW_WIDTH;
+  gint        row, irow, col;
+  guchar      dest_row[GM_PREVIEW_WIDTH][3];
+  guchar     *dest;
+  guchar     *src;
+  gint        check, b;
+  guchar     *dest_total_preview_buffer;
+  const gint  alpha = 3;
+
+  gradient_get_values (gradient_name, (guchar *)values, nvalues);
+
+  dest_total_preview_buffer = g_new (guchar,
+                                     GM_PREVIEW_HEIGHT * GM_PREVIEW_WIDTH * 3);
+
+  for (row = 0; row < GM_PREVIEW_HEIGHT; row += GIMP_CHECK_SIZE_SM)
+    {
+      for (col = 0; col < GM_PREVIEW_WIDTH; col++)
+        {
+          dest = dest_row[col];
+          src  = values[col];
+
+          if (src[alpha] == OPAQUE)
+            {
+              /* no alpha channel or opaque -- simple way */
+              for (b = 0; b < alpha; b++)
+                dest[b] = src[b];
+            }
+          else
+            {
+              /* more or less transparent */
+              if((col % (GIMP_CHECK_SIZE) < GIMP_CHECK_SIZE_SM) ^
+                  (row % (GIMP_CHECK_SIZE) < GIMP_CHECK_SIZE_SM))
+                {
+                  check = GIMP_CHECK_LIGHT * 255;
+                }
+              else
+                {
+                  check = GIMP_CHECK_DARK * 255;
+                }
+
+              if (src[alpha] == 0)
+                {
+                  /* full transparent -- check */
+                  for (b = 0; b < alpha; b++)
+                    dest[b] = check;
+                }
+              else
+                {
+                  /* middlemost transparent -- mix check and src */
+                  for (b = 0; b < alpha; b++)
+                    dest[b] = (src[b] * src[alpha] +
+                               check * (OPAQUE - src[alpha])) / OPAQUE;
+                }
+            }
+        }
+
+      for (irow = 0;
+           irow < GIMP_CHECK_SIZE_SM && row + irow < GM_PREVIEW_HEIGHT;
+           irow++)
+        {
+          memcpy (dest_total_preview_buffer + (row+irow) * 3 * GM_PREVIEW_WIDTH,
+                  dest_row,
+                  GM_PREVIEW_WIDTH * 3);
+        }
+    }
+
+    gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview),
+                            0, 0, GM_PREVIEW_WIDTH, GM_PREVIEW_HEIGHT,
+                            GIMP_RGB_IMAGE,
+                            (const guchar *) dest_total_preview_buffer,
+                            GM_PREVIEW_WIDTH * 3);
+
+    g_free (dest_total_preview_buffer);
+}
+
+static void
+gm_combo_destroy_callback (GtkWidget *w,
+                           gpointer   data)
+{
+  GradientMenu *gm = data;
+  gradient_menus = g_list_remove (gradient_menus, gm);
+}
+
+/*************************************************************************/
+/**                                                                     **/
+/**                     +++ Gradients                                   **/
+/**                                                                     **/
+/*************************************************************************/
+
+/*
+    Manage both internal and external gradients: list up, cache,
+    sampling, etc.
+
+    External gradients are cached.
+ */
+
+
+static void
+gradient_name_copy (gchar       *dest,
+                    const gchar *src)
+{
+  strncpy (dest, src, GRADIENT_NAME_MAX - 1);
+  dest[GRADIENT_NAME_MAX - 1] = '\0';
+}
+
+/*
+  Translate SPACE to "\\040", etc.
+ */
+static void
+gradient_name_encode (gchar       *dest,
+                      const gchar *src)
+{
+  gint cnt = GRADIENT_NAME_MAX - 1;
+
+  while (*src && cnt--)
+    {
+      if (g_ascii_iscntrl (*src) || g_ascii_isspace (*src) || *src == '\\')
+        {
+          sprintf (dest, "\\%03o", *src++);
+          dest += 4;
+        }
+      else
+        *dest++ = *src++;
+    }
+  *dest = '\0';
+}
+
+/*
+  Translate "\\040" to SPACE, etc.
+ */
+static void
+gradient_name_decode (gchar       *dest,
+                      const gchar *src)
+{
+  gint  cnt = GRADIENT_NAME_MAX - 1;
+  guint tmp;
+
+  while (*src && cnt--)
+    {
+      if (*src == '\\' && *(src+1) && *(src+2) && *(src+3))
+        {
+          sscanf (src+1, "%3o", &tmp);
+          *dest++ = tmp;
+          src += 4;
+        }
+      else
+        *dest++ = *src++;
+    }
+  *dest = '\0';
+}
+
+static void
+gradient_init (void)
+{
+  gradient_cache_head = NULL;
+  gradient_cache_count = 0;
+}
+
+static void
+gradient_free (void)
+{
+  gradient_cache_flush ();
+}
+
+static gchar **
+gradient_get_list (gint *num_gradients)
+{
+  gchar **gradients;
+  gchar **external_gradients = NULL;
+  gint    external_ngradients = 0;
+  gint    i, n;
+
+  gradient_cache_flush ();
+  external_gradients = gimp_gradients_get_list (NULL, &external_ngradients);
+
+  *num_gradients = G_N_ELEMENTS (internal_gradients) + external_ngradients;
+  gradients = g_new (gchar *, *num_gradients);
+
+  n = 0;
+  for (i = 0; i < G_N_ELEMENTS (internal_gradients); i++)
+    {
+      gradients[n++] = g_strdup (internal_gradients[i]);
+    }
+  for (i = 0; i < external_ngradients; i++)
+    {
+      gradients[n++] = g_strdup (external_gradients[i]);
+    }
+
+  g_strfreev (external_gradients);
+
+  return gradients;
+}
+
+static void
+gradient_get_values (const gchar *gradient_name,
+                     guchar      *values,
+                     gint         nvalues)
+{
+  /*
+    Criteria to distinguish internal and external is rather simple here.
+    It should be fixed later.
+   */
+  if (gradient_name[0] == '%')
+    gradient_get_values_internal (gradient_name, values, nvalues);
+  else
+    gradient_get_values_external (gradient_name, values, nvalues);
+}
+
+static void
+gradient_get_values_internal (const gchar *gradient_name,
+                              guchar      *values,
+                              gint         nvalues)
+{
+  const guchar white[4]        = { 255, 255, 255, 255 };
+  const guchar white_trans[4]  = { 255, 255, 255, 0   };
+  const guchar red_trans[4]    = { 255, 0,   0,   0   };
+  const guchar blue_trans[4]   = { 0,   0,   255, 0   };
+  const guchar yellow_trans[4] = { 255, 255, 0,   0   };
+
+  /*
+    The internal gradients here are example --
+    What kind of internals would be useful ?
+   */
+  if(!strcmp(gradient_name, "%white"))
+    {
+      gradient_get_blend (white, white, values, nvalues);
+    }
+  else if(!strcmp(gradient_name, "%white_grad"))
+    {
+      gradient_get_blend (white, white_trans, values, nvalues);
+    }
+  else if (!strcmp (gradient_name, "%red_grad"))
+    {
+      gradient_get_blend (white, red_trans, values, nvalues);
+    }
+  else if (!strcmp (gradient_name, "%blue_grad"))
+    {
+      gradient_get_blend (white, blue_trans, values, nvalues);
+    }
+  else if (!strcmp (gradient_name, "%yellow_grad"))
+    {
+      gradient_get_blend (white, yellow_trans, values, nvalues);
+    }
+  else if (!strcmp (gradient_name, "%random"))
+    {
+      gradient_get_random (values, nvalues);
+    }
+  else
+    {
+      gradient_get_default (gradient_name, values, nvalues);
+    }
+}
+
+static void
+gradient_get_blend (const guchar *fg,
+                    const guchar *bg,
+                    guchar       *values,
+                    gint          nvalues)
+{
+  gdouble  x;
+  gint     i;
+  gint     j;
+  guchar  *v = values;
+
+  for (i = 0; i < nvalues; i++)
+    {
+      x = (double) i / nvalues;
+      for (j = 0; j < 4; j++)
+        *v++ = fg[j] * (1 - x) + bg[j] * x;
+    }
+}
+
+static void
+gradient_get_random (guchar *values,
+                     gint    nvalues)
+{
+  gint    i;
+  gint    j;
+  gint    inten;
+  guchar *v = values;
+
+  /*
+    This is really simple  -- gaussian noise might be better
+   */
+  for (i = 0; i < nvalues; i++)
+    {
+      inten = g_random_int_range (0, 256);
+      for (j = 0; j < 3; j++)
+        *v++ = inten;
+      *v++ = 255;
+    }
+}
+
+static void
+gradient_get_default (const gchar *name,
+                      guchar      *values,
+                      gint         nvalues)
+{
+  gdouble  e[3];
+  gdouble  x;
+  gint     i;
+  gint     j;
+  guchar  *v = values;
+
+  /*
+    Create gradient by name
+   */
+  name++;
+  for (j = 0; j < 3; j++)
+    e[j] = name[j] / 255.0;
+
+  for (i = 0; i < nvalues; i++)
+    {
+      x = (double) i / nvalues;
+      for (j = 0; j < 3; j++)
+        *v++ = 255 * pow (x, e[j]);
+      *v++ = 255;
+    }
+}
+
+/*
+  Caching gradients is really needed. It really takes 0.2 seconds each
+  time to resample an external gradient. (And this plug-in has
+  currently 6 gradient menus.)
+
+  However, this caching routine is not too good. It picks up just
+  GRADIENT_RESOLUTION samples every time, and rescales it later.  And
+  cached values are stored in guchar array. No accuracy.
+ */
+static void
+gradient_get_values_external (const gchar *gradient_name,
+                              guchar      *values,
+                              gint         nvalues)
+{
+  GradientCacheItem *ci;
+  gboolean           found;
+#ifdef DEBUG
+  clock_t            clk = clock ();
+#endif
+
+  g_return_if_fail (nvalues >= 2);
+
+  ci = gradient_cache_lookup (gradient_name, &found);
+  if (!found)
+    {
+      /* FIXME: "reverse" hardcoded to FALSE. */
+      gradient_get_values_real_external (gradient_name, ci->values,
+                                         GRADIENT_RESOLUTION, FALSE);
+    }
+  if (nvalues == GRADIENT_RESOLUTION)
+    {
+      memcpy (values, ci->values, 4 * GRADIENT_RESOLUTION);
+    }
+  else
+    {
+      double    pos, frac;
+      int       ipos;
+      int       i, j;
+
+      for (i = 0; i < nvalues; i++)
+        {
+          pos = ((double) i / (nvalues - 1)) * (GRADIENT_RESOLUTION - 1);
+          g_assert (0 <= pos && pos <= GRADIENT_RESOLUTION - 1);
+          ipos = (int) pos; frac = pos - ipos;
+          if (frac == 0.0)
+            {
+              memcpy (&values[4 * i], &ci->values[4 * ipos], 4);
+            }
+          else
+            for (j = 0; j < 4; j++)
+              values[4 * i + j] = ci->values[4 * ipos + j] * (1 - frac)
+                                + ci->values[4 * (ipos + 1) + j] * frac;
+        }
+    }
+
+#ifdef DEBUG
+  get_values_external_clock += clock () - clk;
+  get_values_external_count ++;
+#endif
+
+}
+
+static void
+gradient_get_values_real_external (const gchar *gradient_name,
+                                   guchar      *values,
+                                   gint         nvalues,
+                                   gboolean     reverse)
+{
+  gint     n_tmp_values;
+  gdouble *tmp_values;
+  gint     i;
+  gint     j;
+
+  gimp_gradient_get_uniform_samples (gradient_name, nvalues, reverse,
+                                     &n_tmp_values, &tmp_values);
+
+  for (i = 0; i < nvalues; i++)
+    for (j = 0; j < 4; j++)
+      values[4 * i + j] = (guchar) (tmp_values[4 * i + j] * 255);
+
+  g_free (tmp_values);
+}
+
+void
+gradient_cache_flush (void)
+{
+  GradientCacheItem *ci;
+  GradientCacheItem *tmp;
+
+  ci = gradient_cache_head;
+  while (ci)
+    {
+      tmp = ci->next;
+      g_free (ci);
+      ci = tmp;
+    }
+  gradient_cache_head = NULL;
+  gradient_cache_count = 0;
+}
+
+static GradientCacheItem *
+gradient_cache_lookup (const gchar *name,
+                       gboolean    *found)
+{
+  GradientCacheItem *ci;
+
+  ci = gradient_cache_head;
+  while (ci)
+    {
+      if (!strcmp (ci->name, name))
+        break;
+      ci = ci->next;
+    }
+  if (ci)
+    {
+      *found = TRUE;
+      if (!ci->prev)
+        {
+          g_assert (ci == gradient_cache_head);
+          return ci;
+        }
+      ci->prev->next = ci->next;
+      if (ci->next)
+        ci->next->prev = ci->prev;
+      ci->next = gradient_cache_head;
+      gradient_cache_head->prev = ci;
+      gradient_cache_head = ci;
+      ci->prev = NULL;
+      return ci;
+    }
+  else
+    {
+      *found = FALSE;
+      while (gradient_cache_count >= GRADIENT_CACHE_SIZE)
+        gradient_cache_zorch();
+      ci = g_new (GradientCacheItem, 1);
+      strncpy (ci->name, name, GRADIENT_NAME_MAX - 1);
+      ci->name[GRADIENT_NAME_MAX - 1] = '\0';
+      ci->next = gradient_cache_head;
+      ci->prev = NULL;
+      if (gradient_cache_head)
+        gradient_cache_head->prev = ci;
+      gradient_cache_head = ci;
+      ++gradient_cache_count;
+      return ci;
+    }
+}
+
+static void
+gradient_cache_zorch (void)
+{
+  GradientCacheItem *ci = gradient_cache_head;
+
+  while (ci && ci->next)
+    {
+      ci = ci->next;
+    }
+  if (ci)
+    {
+      g_assert (ci->next == NULL);
+      if (ci->prev)
+        ci->prev->next = NULL;
+      else
+        gradient_cache_head = NULL;
+      g_free (ci);
+      --gradient_cache_count;
+    }
+}
+
+#ifdef DEBUG
+void
+gradient_report (void)
+{
+  double total = (double) get_values_external_clock / CLOCKS_PER_SEC;
+
+  g_printerr ("gradient_get_values_external "
+              "%.2f sec. / %d times (ave %.2f sec.)\n",
+              total,
+              get_values_external_count,
+              total / get_values_external_count);
+}
+#endif