1 /* GDK - The GIMP Drawing Kit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
30 gdk_rectangle_union (GdkRectangle *src1,
34 g_return_if_fail (src1 != NULL);
35 g_return_if_fail (src2 != NULL);
36 g_return_if_fail (dest != NULL);
38 dest->x = MIN (src1->x, src2->x);
39 dest->y = MIN (src1->y, src2->y);
40 dest->width = MAX (src1->x + src1->width, src2->x + src2->width) - dest->x;
41 dest->height = MAX (src1->y + src1->height, src2->y + src2->height) - dest->y;
45 gdk_rectangle_intersect (GdkRectangle *src1,
50 gint src1_x2, src1_y2;
51 gint src2_x2, src2_y2;
54 g_return_val_if_fail (src1 != NULL, FALSE);
55 g_return_val_if_fail (src2 != NULL, FALSE);
56 g_return_val_if_fail (dest != NULL, FALSE);
60 if (src2->x < src1->x)
68 src1_x2 = src1->x + src1->width;
69 src2_x2 = src2->x + src2->width;
71 if (src2->x < src1_x2)
73 if (src1_x2 < src2_x2)
74 dest->width = src1_x2 - dest->x;
76 dest->width = src2_x2 - dest->x;
78 if (src2->y < src1->y)
86 src1_y2 = src1->y + src1->height;
87 src2_y2 = src2->y + src2->height;
89 if (src2->y < src1_y2)
93 if (src1_y2 < src2_y2)
94 dest->height = src1_y2 - dest->y;
96 dest->height = src2_y2 - dest->y;
98 if (dest->height == 0)
100 if (dest->width == 0)