libvips/include/vips/rect.h

76 lines
2.0 KiB
C
Raw Normal View History

2007-08-29 18:23:50 +02:00
/* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifndef IM_RECT_H
#define IM_RECT_H
#ifdef __cplusplus
extern "C" {
#endif /*__cplusplus*/
/* A rectangle.
*/
typedef struct im_rect_struct {
int left, top, width, height;
} Rect;
/* Only define old, broken names if asked.
*/
#ifdef IM_ENABLE_DEPRECATED
/* Useful macros. Compatibility ... see below for new names.
*/
#define right(R) ((R)->left + (R)->width)
#define bottom(R) ((R)->top + (R)->height)
#endif /*IM_ENABLE_DEPRECATED*/
#define IM_RECT_RIGHT(R) ((R)->left + (R)->width)
#define IM_RECT_BOTTOM(R) ((R)->top + (R)->height)
#define IM_RECT_HCENTRE(R) ((R)->left + (R)->width / 2)
#define IM_RECT_VCENTRE(R) ((R)->top + (R)->height / 2)
/* Rectangle algebra functions.
*/
void im_rect_marginadjust( Rect *r, int n );
int im_rect_includespoint( Rect *r, int x, int y );
int im_rect_includesrect( Rect *r1, Rect *r2 );
void im_rect_intersectrect( Rect *r1, Rect *r2, Rect *r3 );
int im_rect_isempty( Rect *r );
void im_rect_unionrect( Rect *r1, Rect *r2, Rect *r3 );
int im_rect_equalsrect( Rect *r1, Rect *r2 );
Rect *im_rect_dup( Rect *r );
void im_rect_normalise( Rect *r );
#ifdef __cplusplus
}
#endif /*__cplusplus*/
#endif /*IM_RECT_H*/