Adding upstream version 2.10.36.upstream/2.10.36

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 133 insertions, 0 deletions

diff --git a/libgimpbase/gimprectangle.c b/libgimpbase/gimprectangle.c
new file mode 100644
index 0000000..678ff82
--- /dev/null
+++ b/libgimpbase/gimprectangle.c
@@ -0,0 +1,133 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * gimprectangle.c
+ *
+ * This library 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.
+ *
+ * This library 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 this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <glib.h>
+
+#include "gimprectangle.h"
+
+
+/**
+ * SECTION: gimprectangle
+ * @title: gimprectangle
+ * @short_description: Utility functions dealing with rectangle extents.
+ *
+ * Utility functions dealing with rectangle extents.
+ **/
+
+
+/**
+ * gimp_rectangle_intersect:
+ * @x1:          origin of first rectangle
+ * @y1:          origin of first rectangle
+ * @width1:      width of first rectangle
+ * @height1:     height of first rectangle
+ * @x2:          origin of second rectangle
+ * @y2:          origin of second rectangle
+ * @width2:      width of second rectangle
+ * @height2:     height of second rectangle
+ * @dest_x:      return location for origin of intersection (may be %NULL)
+ * @dest_y:      return location for origin of intersection (may be %NULL)
+ * @dest_width:  return location for width of intersection (may be %NULL)
+ * @dest_height: return location for height of intersection (may be %NULL)
+ *
+ * Calculates the intersection of two rectangles.
+ *
+ * Return value: %TRUE if the intersection is non-empty, %FALSE otherwise
+ *
+ * Since: 2.4
+ **/
+gboolean
+gimp_rectangle_intersect (gint  x1,
+                          gint  y1,
+                          gint  width1,
+                          gint  height1,
+                          gint  x2,
+                          gint  y2,
+                          gint  width2,
+                          gint  height2,
+                          gint *dest_x,
+                          gint *dest_y,
+                          gint *dest_width,
+                          gint *dest_height)
+{
+  gint d_x, d_y;
+  gint d_w, d_h;
+
+  d_x = MAX (x1, x2);
+  d_y = MAX (y1, y2);
+  d_w = MIN (x1 + width1,  x2 + width2)  - d_x;
+  d_h = MIN (y1 + height1, y2 + height2) - d_y;
+
+  if (dest_x)      *dest_x      = d_x;
+  if (dest_y)      *dest_y      = d_y;
+  if (dest_width)  *dest_width  = d_w;
+  if (dest_height) *dest_height = d_h;
+
+  return (d_w > 0 && d_h > 0);
+}
+
+/**
+ * gimp_rectangle_union:
+ * @x1:          origin of first rectangle
+ * @y1:          origin of first rectangle
+ * @width1:      width of first rectangle
+ * @height1:     height of first rectangle
+ * @x2:          origin of second rectangle
+ * @y2:          origin of second rectangle
+ * @width2:      width of second rectangle
+ * @height2:     height of second rectangle
+ * @dest_x:      return location for origin of union (may be %NULL)
+ * @dest_y:      return location for origin of union (may be %NULL)
+ * @dest_width:  return location for width of union (may be %NULL)
+ * @dest_height: return location for height of union (may be %NULL)
+ *
+ * Calculates the union of two rectangles.
+ *
+ * Since: 2.8
+ **/
+void
+gimp_rectangle_union (gint  x1,
+                      gint  y1,
+                      gint  width1,
+                      gint  height1,
+                      gint  x2,
+                      gint  y2,
+                      gint  width2,
+                      gint  height2,
+                      gint *dest_x,
+                      gint *dest_y,
+                      gint *dest_width,
+                      gint *dest_height)
+{
+  gint d_x, d_y;
+  gint d_w, d_h;
+
+  d_x = MIN (x1, x2);
+  d_y = MIN (y1, y2);
+  d_w = MAX (x1 + width1,  x2 + width2)  - d_x;
+  d_h = MAX (y1 + height1, y2 + height2) - d_y;
+
+  if (dest_x)      *dest_x      = d_x;
+  if (dest_y)      *dest_y      = d_y;
+  if (dest_width)  *dest_width  = d_w;
+  if (dest_height) *dest_height = d_h;
+}