summaryrefslogtreecommitdiffstats
path: root/app/gegl/gimp-gegl-tile-compat.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--app/gegl/gimp-gegl-tile-compat.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/app/gegl/gimp-gegl-tile-compat.c b/app/gegl/gimp-gegl-tile-compat.c
new file mode 100644
index 0000000..54d917c
--- /dev/null
+++ b/app/gegl/gimp-gegl-tile-compat.c
@@ -0,0 +1,79 @@
+/* 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;
+}