include/SDL_rect.h
author Sam Lantinga <slouken@libsdl.org>
Mon, 08 Dec 2008 00:27:32 +0000
changeset 2859 99210400e8b9
parent 2275 12ea0fdc0df2
child 2909 3da0bb421d83
permissions -rw-r--r--
Updated copyright date
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2009 Sam Lantinga
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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 2.1 of the License, or (at your option) any later version.
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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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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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/**
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 * \file SDL_rect.h
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 *
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 * Header file for SDL_rect definition and management functions
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 */
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#ifndef _SDL_rect_h
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#define _SDL_rect_h
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#include "SDL_stdinc.h"
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#include "SDL_error.h"
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#include "SDL_pixels.h"
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#include "SDL_rwops.h"
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#include "begin_code.h"
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/* Set up for C function definitions, even when using C++ */
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#ifdef __cplusplus
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/* *INDENT-OFF* */
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extern "C" {
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/* *INDENT-ON* */
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#endif
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/**
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 * \struct SDL_Rect
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 *
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 * \brief A rectangle, with the origin at the upper left.
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 *
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 * \sa SDL_RectEmpty
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 * \sa SDL_RectEquals
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 * \sa SDL_HasIntersection
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 * \sa SDL_IntersectRect
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 * \sa SDL_UnionRect
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 */
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typedef struct SDL_Rect
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{
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    int x, y;
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    int w, h;
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} SDL_Rect;
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/**
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 * \def SDL_RectEmpty()
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 *
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 * \brief Returns true if the rectangle has no area.
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 */
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#define SDL_RectEmpty(X)    (((X)->w <= 0) || ((X)->h <= 0))
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/**
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 * \def SDL_RectEquals()
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 *
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 * \brief Returns true if the two rectangles are equal.
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 */
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#define SDL_RectEquals(A, B)   (((A)->x == (B)->x) && ((A)->y == (B)->y) && \
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                                ((A)->w == (B)->w) && ((A)->h == (B)->h))
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/**
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 * \fn SDL_bool SDL_HasIntersection(const SDL_Rect * A, const SDL_Rect * B);
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 *
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 * \brief Determine whether two rectangles intersect.
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 *
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 * \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
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 */
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extern DECLSPEC SDL_bool SDLCALL SDL_HasIntersection(const SDL_Rect * A,
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                                                     const SDL_Rect * B);
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/**
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 * \fn SDL_bool SDL_IntersectRect(const SDL_Rect * A, const SDL_Rect * B, SDL_Rect * result)
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 *
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 * \brief Calculate the intersection of two rectangles.
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 *
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 * \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
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 */
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extern DECLSPEC SDL_bool SDLCALL SDL_IntersectRect(const SDL_Rect * A,
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                                                   const SDL_Rect * B,
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                                                   SDL_Rect * result);
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/**
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 * \fn void SDL_UnionRect(const SDL_Rect * A, const SDL_Rect * B, SDL_Rect * result)
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 *
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 * \brief Calculate the union of two rectangles
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 */
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extern DECLSPEC void SDLCALL SDL_UnionRect(const SDL_Rect * A,
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                                           const SDL_Rect * B,
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                                           SDL_Rect * result);
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/* Ends C function definitions when using C++ */
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#ifdef __cplusplus
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/* *INDENT-OFF* */
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}
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/* *INDENT-ON* */
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#endif
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#include "close_code.h"
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#endif /* _SDL_rect_h */
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/* vi: set ts=4 sw=4 expandtab: */