/* This file is part of GEGL
 *
 * GEGL is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * GEGL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with GEGL; if not, see <https://www.gnu.org/licenses/>.
 *
 * Copyright 2006 Øyvind Kolås
 */

/* GeglOperationPointFilter
 * The point-filter base class is for filters where an output pixel only depends on the color and alpha values
 * of the corresponding input pixel. This allows you to do the processing on linear buffers, in the future 
 * versions of GEGL operations implemented using the point-filter will get speed increases due to more 
 * intelligent processing possible in the point filter class
 */

#ifndef __GEGL_OPERATION_POINT_FILTER_H__
#define __GEGL_OPERATION_POINT_FILTER_H__

#include "gegl-operation-filter.h"

#include "opencl/gegl-cl.h"

G_BEGIN_DECLS

#define GEGL_TYPE_OPERATION_POINT_FILTER            (gegl_operation_point_filter_get_type ())
#define GEGL_OPERATION_POINT_FILTER(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GEGL_TYPE_OPERATION_POINT_FILTER, GeglOperationPointFilter))
#define GEGL_OPERATION_POINT_FILTER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  GEGL_TYPE_OPERATION_POINT_FILTER, GeglOperationPointFilterClass))
#define GEGL_IS_OPERATION_POINT_FILTER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GEGL_TYPE_OPERATION_POINT_FILTER))
#define GEGL_IS_OPERATION_POINT_FILTER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  GEGL_TYPE_OPERATION_POINT_FILTER))
#define GEGL_OPERATION_POINT_FILTER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  GEGL_TYPE_OPERATION_POINT_FILTER, GeglOperationPointFilterClass))

typedef struct _GeglOperationPointFilter  GeglOperationPointFilter;
struct _GeglOperationPointFilter
{
  GeglOperationFilter parent_instance;
};

typedef struct _GeglOperationPointFilterClass GeglOperationPointFilterClass;
struct _GeglOperationPointFilterClass
{
  GeglOperationFilterClass parent_class;

  gboolean (* process) (GeglOperation      *self,    /* for parameters    */
                        void               *in_buf,  /* input buffer      */
                        void               *out_buf, /* output buffer     */
                        glong               samples, /* number of samples */
                        const GeglRectangle *roi,    /* rectangle out_buf spans
                                                        in in buffer, see the
                                                        checkerboard op for
                                                        semantics */
                        gint                 level);
  gboolean (* cl_process) (GeglOperation       *self,
                           cl_mem               in_tex,
                           cl_mem               out_tex,
                           size_t               global_worksize,
                           const GeglRectangle *roi,
                           gint                 level);
  gpointer                 pad[4];
};

GType gegl_operation_point_filter_get_type (void) G_GNUC_CONST;

G_DEFINE_AUTOPTR_CLEANUP_FUNC (GeglOperationPointFilter, g_object_unref)

G_END_DECLS

#endif