76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
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/* Simple rectangle algebra.
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifndef IM_RECT_H
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#define IM_RECT_H
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#ifdef __cplusplus
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extern "C" {
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#endif /*__cplusplus*/
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/* A rectangle.
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*/
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typedef struct im_rect_struct {
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int left, top, width, height;
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} Rect;
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/* Only define old, broken names if asked.
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*/
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#ifdef IM_ENABLE_DEPRECATED
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/* Useful macros. Compatibility ... see below for new names.
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*/
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#define right(R) ((R)->left + (R)->width)
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#define bottom(R) ((R)->top + (R)->height)
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#endif /*IM_ENABLE_DEPRECATED*/
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#define IM_RECT_RIGHT(R) ((R)->left + (R)->width)
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#define IM_RECT_BOTTOM(R) ((R)->top + (R)->height)
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#define IM_RECT_HCENTRE(R) ((R)->left + (R)->width / 2)
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#define IM_RECT_VCENTRE(R) ((R)->top + (R)->height / 2)
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/* Rectangle algebra functions.
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*/
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void im_rect_marginadjust( Rect *r, int n );
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int im_rect_includespoint( Rect *r, int x, int y );
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int im_rect_includesrect( Rect *r1, Rect *r2 );
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void im_rect_intersectrect( Rect *r1, Rect *r2, Rect *r3 );
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int im_rect_isempty( Rect *r );
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void im_rect_unionrect( Rect *r1, Rect *r2, Rect *r3 );
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int im_rect_equalsrect( Rect *r1, Rect *r2 );
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Rect *im_rect_dup( Rect *r );
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void im_rect_normalise( Rect *r );
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#ifdef __cplusplus
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}
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#endif /*__cplusplus*/
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#endif /*IM_RECT_H*/
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