mirror of
https://gitlab.gnome.org/GNOME/gimp.git
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8005eea835
because it confuses gtk-doc and breaks some links. Also change the "Index of new symbols in GIMP 2.x" sections to be what seems to be the modern standard (looked at the GLib and GTK+ docs), and update some other stuff.
133 lines
4.1 KiB
C
133 lines
4.1 KiB
C
/* LIBGIMP - The GIMP Library
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* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
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*
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* gimprectangle.c
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*
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* This library is free software: you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <glib.h>
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#include "gimprectangle.h"
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/**
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* SECTION: gimprectangle
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* @title: gimprectangle
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* @short_description: Utility functions dealing with rectangle extents.
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*
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* Utility functions dealing with rectangle extents.
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**/
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/**
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* gimp_rectangle_intersect:
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* @x1: origin of first rectangle
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* @y1: origin of first rectangle
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* @width1: width of first rectangle
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* @height1: height of first rectangle
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* @x2: origin of second rectangle
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* @y2: origin of second rectangle
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* @width2: width of second rectangle
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* @height2: height of second rectangle
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* @dest_x: return location for origin of intersection (may be %NULL)
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* @dest_y: return location for origin of intersection (may be %NULL)
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* @dest_width: return location for width of intersection (may be %NULL)
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* @dest_height: return location for height of intersection (may be %NULL)
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*
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* Calculates the intersection of two rectangles.
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*
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* Return value: %TRUE if the intersection is non-empty, %FALSE otherwise
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*
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* Since: 2.4
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**/
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gboolean
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gimp_rectangle_intersect (gint x1,
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gint y1,
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gint width1,
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gint height1,
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gint x2,
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gint y2,
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gint width2,
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gint height2,
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gint *dest_x,
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gint *dest_y,
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gint *dest_width,
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gint *dest_height)
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{
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gint d_x, d_y;
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gint d_w, d_h;
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d_x = MAX (x1, x2);
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d_y = MAX (y1, y2);
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d_w = MIN (x1 + width1, x2 + width2) - d_x;
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d_h = MIN (y1 + height1, y2 + height2) - d_y;
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if (dest_x) *dest_x = d_x;
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if (dest_y) *dest_y = d_y;
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if (dest_width) *dest_width = d_w;
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if (dest_height) *dest_height = d_h;
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return (d_w > 0 && d_h > 0);
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}
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/**
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* gimp_rectangle_union:
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* @x1: origin of first rectangle
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* @y1: origin of first rectangle
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* @width1: width of first rectangle
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* @height1: height of first rectangle
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* @x2: origin of second rectangle
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* @y2: origin of second rectangle
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* @width2: width of second rectangle
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* @height2: height of second rectangle
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* @dest_x: return location for origin of union (may be %NULL)
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* @dest_y: return location for origin of union (may be %NULL)
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* @dest_width: return location for width of union (may be %NULL)
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* @dest_height: return location for height of union (may be %NULL)
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*
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* Calculates the union of two rectangles.
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*
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* Since: 2.8
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**/
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void
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gimp_rectangle_union (gint x1,
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gint y1,
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gint width1,
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gint height1,
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gint x2,
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gint y2,
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gint width2,
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gint height2,
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gint *dest_x,
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gint *dest_y,
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gint *dest_width,
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gint *dest_height)
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{
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gint d_x, d_y;
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gint d_w, d_h;
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d_x = MIN (x1, x2);
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d_y = MIN (y1, y2);
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d_w = MAX (x1 + width1, x2 + width2) - d_x;
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d_h = MAX (y1 + height1, y2 + height2) - d_y;
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if (dest_x) *dest_x = d_x;
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if (dest_y) *dest_y = d_y;
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if (dest_width) *dest_width = d_w;
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if (dest_height) *dest_height = d_h;
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}
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