84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pika-gegl-tile-compat.h
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* Copyright (C) 2012 Michael Natterer <mitch@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include "pika-gegl-types.h"
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#include "pika-gegl-tile-compat.h"
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gint
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pika_gegl_buffer_get_n_tile_rows (GeglBuffer *buffer,
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gint tile_height)
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{
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return (gegl_buffer_get_height (buffer) + tile_height - 1) / tile_height;
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}
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gint
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pika_gegl_buffer_get_n_tile_cols (GeglBuffer *buffer,
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gint tile_width)
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{
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return (gegl_buffer_get_width (buffer) + tile_width - 1) / tile_width;
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}
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gboolean
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pika_gegl_buffer_get_tile_rect (GeglBuffer *buffer,
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gint tile_width,
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gint tile_height,
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gint tile_num,
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GeglRectangle *rect)
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{
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gint n_tile_rows;
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gint n_tile_columns;
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gint tile_row;
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gint tile_column;
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n_tile_rows = pika_gegl_buffer_get_n_tile_rows (buffer, tile_height);
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n_tile_columns = pika_gegl_buffer_get_n_tile_cols (buffer, tile_width);
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if (tile_num > n_tile_rows * n_tile_columns - 1)
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return FALSE;
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tile_row = tile_num / n_tile_columns;
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tile_column = tile_num % n_tile_columns;
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rect->x = tile_column * tile_width;
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rect->y = tile_row * tile_height;
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if (tile_column == n_tile_columns - 1)
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rect->width = gegl_buffer_get_width (buffer) - rect->x;
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else
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rect->width = tile_width;
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if (tile_row == n_tile_rows - 1)
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rect->height = gegl_buffer_get_height (buffer) - rect->y;
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else
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rect->height = tile_height;
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return TRUE;
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}
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