1 files changed, 63 insertions, 0 deletions
diff --git a/plug-ins/selection-to-path/bounding-box.h b/plug-ins/selection-to-path/bounding-box.h
new file mode 100644
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--- /dev/null
+++ b/plug-ins/selection-to-path/bounding-box.h
@@ -0,0 +1,63 @@
+/* bounding-box.h: operations on both real- and integer-valued bounding boxes.
+ *
+ * Copyright (C) 1992 Free Software Foundation, Inc.
+ *
+ * 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, 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 BOUNDING_BOX_H
+#define BOUNDING_BOX_H
+
+#include "types.h"
+
+
+/* The bounding box's numbers are usually in Cartesian/Metafont
+   coordinates: (0,0) is towards the lower left.  */
+typedef struct
+{
+  signed_4_bytes min_row, max_row;
+  signed_4_bytes min_col, max_col;
+} bounding_box_type;
+
+typedef struct
+{
+  real min_row, max_row;
+  real min_col, max_col;
+} real_bounding_box_type;
+
+/* These accessing macros work for both types of bounding boxes, since
+   the member names are the same.  */
+#define MIN_ROW(bb) ((bb).min_row)
+#define MAX_ROW(bb) ((bb).max_row)
+#define MIN_COL(bb) ((bb).min_col)
+#define MAX_COL(bb) ((bb).max_col)
+
+/* See the comments at `get_character_bitmap' in gf_input.c for why the
+   width and height are treated asymmetrically.  */
+#define BB_WIDTH(bb) (MAX_COL (bb) - MIN_COL (bb))
+#define BB_HEIGHT(bb) (MAX_ROW (bb) - MIN_ROW (bb) + 1)
+
+
+/* Convert a dimensions structure to an integer bounding box, and vice
+   versa.  */
+extern bounding_box_type dimensions_to_bb (dimensions_type);
+extern dimensions_type bb_to_dimensions (bounding_box_type);
+
+
+/* Update the bounding box BB from the point P.  */
+extern void update_real_bounding_box (real_bounding_box_type *bb,
+                                      real_coordinate_type p);
+extern void update_bounding_box (bounding_box_type *bb, coordinate_type p);
+
+#endif /* not BOUNDING_BOX_H */