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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimp-gegl-tile-compat.h
* Copyright (C) 2012 Michael Natterer <mitch@gimp.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include "gimp-gegl-types.h"
#include "gimp-gegl-tile-compat.h"
gint
gimp_gegl_buffer_get_n_tile_rows (GeglBuffer *buffer,
gint tile_height)
{
return (gegl_buffer_get_height (buffer) + tile_height - 1) / tile_height;
}
gint
gimp_gegl_buffer_get_n_tile_cols (GeglBuffer *buffer,
gint tile_width)
{
return (gegl_buffer_get_width (buffer) + tile_width - 1) / tile_width;
}
gboolean
gimp_gegl_buffer_get_tile_rect (GeglBuffer *buffer,
gint tile_width,
gint tile_height,
gint tile_num,
GeglRectangle *rect)
{
gint n_tile_rows;
gint n_tile_columns;
gint tile_row;
gint tile_column;
n_tile_rows = gimp_gegl_buffer_get_n_tile_rows (buffer, tile_height);
n_tile_columns = gimp_gegl_buffer_get_n_tile_cols (buffer, tile_width);
if (tile_num > n_tile_rows * n_tile_columns - 1)
return FALSE;
tile_row = tile_num / n_tile_columns;
tile_column = tile_num % n_tile_columns;
rect->x = tile_column * tile_width;
rect->y = tile_row * tile_height;
if (tile_column == n_tile_columns - 1)
rect->width = gegl_buffer_get_width (buffer) - rect->x;
else
rect->width = tile_width;
if (tile_row == n_tile_rows - 1)
rect->height = gegl_buffer_get_height (buffer) - rect->y;
else
rect->height = tile_height;
return TRUE;
}
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