mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-11-14 04:31:09 +00:00
fe85272112
This commit was created using a script that searched for all docstrings containing a parameter and the string 'or %NULL'. Gdk backends and demos excluded as they are not part of a public API https://bugzilla.gnome.org/show_bug.cgi?id=610474
139 lines
3.9 KiB
C
139 lines
3.9 KiB
C
/* 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 Lesser 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
|
|
* 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, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
/*
|
|
* Modified by the GTK+ Team and others 1997-2000. 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 "config.h"
|
|
#include <gdk/gdk.h>
|
|
#include "gdkalias.h"
|
|
|
|
/**
|
|
* gdk_rectangle_union:
|
|
* @src1: a #GdkRectangle
|
|
* @src2: a #GdkRectangle
|
|
* @dest: return location for the union of @src1 and @src2
|
|
*
|
|
* Calculates the union of two rectangles.
|
|
* The union of rectangles @src1 and @src2 is the smallest rectangle which
|
|
* includes both @src1 and @src2 within it.
|
|
* It is allowed for @dest to be the same as either @src1 or @src2.
|
|
*/
|
|
void
|
|
gdk_rectangle_union (const GdkRectangle *src1,
|
|
const GdkRectangle *src2,
|
|
GdkRectangle *dest)
|
|
{
|
|
gint dest_x, dest_y;
|
|
|
|
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;
|
|
dest->x = dest_x;
|
|
dest->y = dest_y;
|
|
}
|
|
|
|
/**
|
|
* gdk_rectangle_intersect:
|
|
* @src1: a #GdkRectangle
|
|
* @src2: a #GdkRectangle
|
|
* @dest: (allow-none): return location for the intersection of @src1 and @src2, or %NULL
|
|
*
|
|
* Calculates the intersection of two rectangles. It is allowed for
|
|
* @dest to be the same as either @src1 or @src2. If the rectangles
|
|
* do not intersect, @dest's width and height is set to 0 and its x
|
|
* and y values are undefined. If you are only interested in whether
|
|
* the rectangles intersect, but not in the intersecting area itself,
|
|
* pass %NULL for @dest.
|
|
*
|
|
* Returns: %TRUE if the rectangles intersect.
|
|
*/
|
|
gboolean
|
|
gdk_rectangle_intersect (const GdkRectangle *src1,
|
|
const GdkRectangle *src2,
|
|
GdkRectangle *dest)
|
|
{
|
|
gint dest_x, dest_y;
|
|
gint dest_x2, dest_y2;
|
|
gint return_val;
|
|
|
|
g_return_val_if_fail (src1 != NULL, FALSE);
|
|
g_return_val_if_fail (src2 != NULL, FALSE);
|
|
|
|
return_val = FALSE;
|
|
|
|
dest_x = MAX (src1->x, src2->x);
|
|
dest_y = MAX (src1->y, src2->y);
|
|
dest_x2 = MIN (src1->x + src1->width, src2->x + src2->width);
|
|
dest_y2 = MIN (src1->y + src1->height, src2->y + src2->height);
|
|
|
|
if (dest_x2 > dest_x && dest_y2 > dest_y)
|
|
{
|
|
if (dest)
|
|
{
|
|
dest->x = dest_x;
|
|
dest->y = dest_y;
|
|
dest->width = dest_x2 - dest_x;
|
|
dest->height = dest_y2 - dest_y;
|
|
}
|
|
return_val = TRUE;
|
|
}
|
|
else if (dest)
|
|
{
|
|
dest->width = 0;
|
|
dest->height = 0;
|
|
}
|
|
|
|
return return_val;
|
|
}
|
|
|
|
static GdkRectangle *
|
|
gdk_rectangle_copy (const GdkRectangle *rectangle)
|
|
{
|
|
GdkRectangle *result = g_new (GdkRectangle, 1);
|
|
*result = *rectangle;
|
|
|
|
return result;
|
|
}
|
|
|
|
GType
|
|
gdk_rectangle_get_type (void)
|
|
{
|
|
static GType our_type = 0;
|
|
|
|
if (our_type == 0)
|
|
our_type = g_boxed_type_register_static (g_intern_static_string ("GdkRectangle"),
|
|
(GBoxedCopyFunc)gdk_rectangle_copy,
|
|
(GBoxedFreeFunc)g_free);
|
|
return our_type;
|
|
}
|
|
|
|
|
|
#define __GDK_RECTANGLE_C__
|
|
#include "gdkaliasdef.c"
|