/* Simple rectangle algebra.
 */

/*

	This file is part of VIPS.

	VIPS 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 program 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 program; if not, write to the Free Software
	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	02110-1301  USA

 */

/*

	These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk

 */

#ifndef VIPS_RECT_H
#define VIPS_RECT_H

#include <glib.h>

#ifdef __cplusplus
extern "C" {
#endif /*__cplusplus*/

typedef struct _VipsRect {
	/*< public >*/
	int left;
	int top;
	int width;
	int height;
} VipsRect;

#define VIPS_RECT_RIGHT(R) ((R)->left + (R)->width)
#define VIPS_RECT_BOTTOM(R) ((R)->top + (R)->height)
#define VIPS_RECT_HCENTRE(R) ((R)->left + (R)->width / 2)
#define VIPS_RECT_VCENTRE(R) ((R)->top + (R)->height / 2)

VIPS_API
gboolean vips_rect_isempty(const VipsRect *r);
VIPS_API
gboolean vips_rect_includespoint(const VipsRect *r, int x, int y);
VIPS_API
gboolean vips_rect_includesrect(const VipsRect *r1, const VipsRect *r2);
VIPS_API
gboolean vips_rect_equalsrect(const VipsRect *r1, const VipsRect *r2);
VIPS_API
gboolean vips_rect_overlapsrect(const VipsRect *r1, const VipsRect *r2);
VIPS_API
void vips_rect_marginadjust(VipsRect *r, int n);
VIPS_API
void vips_rect_intersectrect(const VipsRect *r1, const VipsRect *r2,
	VipsRect *out);
VIPS_API
void vips_rect_unionrect(const VipsRect *r1, const VipsRect *r2,
	VipsRect *out);
VIPS_API
VipsRect *vips_rect_dup(const VipsRect *r);
VIPS_API
void vips_rect_normalise(VipsRect *r);

#ifdef __cplusplus
}
#endif /*__cplusplus*/

#endif /*VIPS_RECT_H*/