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/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include <gdk/gdk.h>
void
gdk_rectangle_union (GdkRectangle *src1,
GdkRectangle *src2,
GdkRectangle *dest)
{
g_return_if_fail (src1 != NULL);
g_return_if_fail (src2 != NULL);
g_return_if_fail (dest != NULL);
dest->x = MIN (src1->x, src2->x);
dest->y = MIN (src1->y, src2->y);
dest->width = MAX (src1->x + src1->width, src2->x + src2->width) - dest->x;
dest->height = MAX (src1->y + src1->height, src2->y + src2->height) - dest->y;
}
gint
gdk_rectangle_intersect (GdkRectangle *src1,
GdkRectangle *src2,
GdkRectangle *dest)
{
GdkRectangle *temp;
gint src1_x2, src1_y2;
gint src2_x2, src2_y2;
gint return_val;
g_return_val_if_fail (src1 != NULL, FALSE);
g_return_val_if_fail (src2 != NULL, FALSE);
g_return_val_if_fail (dest != NULL, FALSE);
return_val = FALSE;
if (src2->x < src1->x)
{
temp = src1;
src1 = src2;
src2 = temp;
}
dest->x = src2->x;
src1_x2 = src1->x + src1->width;
src2_x2 = src2->x + src2->width;
if (src2->x < src1_x2)
{
if (src1_x2 < src2_x2)
dest->width = src1_x2 - dest->x;
else
dest->width = src2_x2 - dest->x;
if (src2->y < src1->y)
{
temp = src1;
src1 = src2;
src2 = temp;
}
dest->y = src2->y;
src1_y2 = src1->y + src1->height;
src2_y2 = src2->y + src2->height;
if (src2->y < src1_y2)
{
return_val = TRUE;
if (src1_y2 < src2_y2)
dest->height = src1_y2 - dest->y;
else
dest->height = src2_y2 - dest->y;
if (dest->height == 0)
return_val = FALSE;
if (dest->width == 0)
return_val = FALSE;
}
}
return return_val;
}
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