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diff --git a/app/core/gimptilehandlerprojectable.h b/app/core/gimptilehandlerprojectable.h
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+++ b/app/core/gimptilehandlerprojectable.h
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_TILE_HANDLER_PROJECTABLE_H__
+#define __GIMP_TILE_HANDLER_PROJECTABLE_H__
+
+
+#include "gegl/gimptilehandlervalidate.h"
+
+
+/***
+ * GimpTileHandlerProjectable is a GeglTileHandler that renders a
+ * projectable, calling the projectable's begin_render() and end_render()
+ * before/after the actual rendering.
+ *
+ * Note that the tile handler does not own a reference to the projectable.
+ * It's the user's responsibility to manage the handler's and projectable's
+ * lifetime.
+ */
+
+#define GIMP_TYPE_TILE_HANDLER_PROJECTABLE            (gimp_tile_handler_projectable_get_type ())
+#define GIMP_TILE_HANDLER_PROJECTABLE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_TILE_HANDLER_PROJECTABLE, GimpTileHandlerProjectable))
+#define GIMP_TILE_HANDLER_PROJECTABLE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GIMP_TYPE_TILE_HANDLER_PROJECTABLE, GimpTileHandlerProjectableClass))
+#define GIMP_IS_TILE_HANDLER_PROJECTABLE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_TILE_HANDLER_PROJECTABLE))
+#define GIMP_IS_TILE_HANDLER_PROJECTABLE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GIMP_TYPE_TILE_HANDLER_PROJECTABLE))
+#define GIMP_TILE_HANDLER_PROJECTABLE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GIMP_TYPE_TILE_HANDLER_PROJECTABLE, GimpTileHandlerProjectableClass))
+
+
+typedef struct _GimpTileHandlerProjectable      GimpTileHandlerProjectable;
+typedef struct _GimpTileHandlerProjectableClass GimpTileHandlerProjectableClass;
+
+struct _GimpTileHandlerProjectable
+{
+  GimpTileHandlerValidate  parent_instance;
+
+  GimpProjectable         *projectable;
+};
+
+struct _GimpTileHandlerProjectableClass
+{
+  GimpTileHandlerValidateClass  parent_class;
+};
+
+
+GType             gimp_tile_handler_projectable_get_type (void) G_GNUC_CONST;
+
+GeglTileHandler * gimp_tile_handler_projectable_new      (GimpProjectable *projectable);
+
+
+#endif /* __GIMP_TILE_HANDLER_PROJECTABLE_H__ */