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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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "gdk.h"
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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