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diff --git a/app/gegl/gimptilehandlervalidate.h b/app/gegl/gimptilehandlervalidate.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_VALIDATE_H__
+#define __GIMP_TILE_HANDLER_VALIDATE_H__
+
+#include <gegl-buffer-backend.h>
+
+/***
+ * GimpTileHandlerValidate is a GeglTileHandler that renders the
+ * projection.
+ */
+
+G_BEGIN_DECLS
+
+#define GIMP_TYPE_TILE_HANDLER_VALIDATE (gimp_tile_handler_validate_get_type ())
+#define GIMP_TILE_HANDLER_VALIDATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_TILE_HANDLER_VALIDATE, GimpTileHandlerValidate))
+#define GIMP_TILE_HANDLER_VALIDATE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_TILE_HANDLER_VALIDATE, GimpTileHandlerValidateClass))
+#define GIMP_IS_TILE_HANDLER_VALIDATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_TILE_HANDLER_VALIDATE))
+#define GIMP_IS_TILE_HANDLER_VALIDATE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_TILE_HANDLER_VALIDATE))
+#define GIMP_TILE_HANDLER_VALIDATE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_TILE_HANDLER_VALIDATE, GimpTileHandlerValidateClass))
+
+
+typedef struct _GimpTileHandlerValidate GimpTileHandlerValidate;
+typedef struct _GimpTileHandlerValidateClass GimpTileHandlerValidateClass;
+
+struct _GimpTileHandlerValidate
+{
+ GeglTileHandler parent_instance;
+
+ GeglNode *graph;
+ cairo_region_t *dirty_region;
+ const Babl *format;
+ gint tile_width;
+ gint tile_height;
+ gboolean whole_tile;
+ gint validating;
+ gint suspend_validate;
+};
+
+struct _GimpTileHandlerValidateClass
+{
+ GeglTileHandlerClass parent_class;
+
+ /* signals */
+ void (* invalidated) (GimpTileHandlerValidate *validate,
+ const GeglRectangle *rect);
+
+ /* virtual functions */
+ void (* begin_validate) (GimpTileHandlerValidate *validate);
+ void (* end_validate) (GimpTileHandlerValidate *validate);
+ void (* validate) (GimpTileHandlerValidate *validate,
+ const GeglRectangle *rect,
+ const Babl *format,
+ gpointer dest_buf,
+ gint dest_stride);
+ void (* validate_buffer) (GimpTileHandlerValidate *validate,
+ const GeglRectangle *rect,
+ GeglBuffer *buffer);
+};
+
+
+GType gimp_tile_handler_validate_get_type (void) G_GNUC_CONST;
+
+GeglTileHandler * gimp_tile_handler_validate_new (GeglNode *graph);
+
+void gimp_tile_handler_validate_assign (GimpTileHandlerValidate *validate,
+ GeglBuffer *buffer);
+void gimp_tile_handler_validate_unassign (GimpTileHandlerValidate *validate,
+ GeglBuffer *buffer);
+GimpTileHandlerValidate * gimp_tile_handler_validate_get_assigned (GeglBuffer *buffer);
+
+void gimp_tile_handler_validate_invalidate (GimpTileHandlerValidate *validate,
+ const GeglRectangle *rect);
+void gimp_tile_handler_validate_undo_invalidate (GimpTileHandlerValidate *validate,
+ const GeglRectangle *rect);
+
+void gimp_tile_handler_validate_begin_validate (GimpTileHandlerValidate *validate);
+void gimp_tile_handler_validate_end_validate (GimpTileHandlerValidate *validate);
+
+void gimp_tile_handler_validate_validate (GimpTileHandlerValidate *validate,
+ GeglBuffer *buffer,
+ const GeglRectangle *rect,
+ gboolean intersect,
+ gboolean chunked);
+
+gboolean gimp_tile_handler_validate_buffer_set_extent (GeglBuffer *buffer,
+ const GeglRectangle *extent);
+
+void gimp_tile_handler_validate_buffer_copy (GeglBuffer *src_buffer,
+ const GeglRectangle *src_rect,
+ GeglBuffer *dst_buffer,
+ const GeglRectangle *dst_rect);
+
+
+G_END_DECLS
+
+#endif /* __GIMP_TILE_HANDLER_VALIDATE_H__ */