mirror of
https://github.com/ZDoom/Raze.git
synced 2024-11-16 01:11:44 +00:00
148 lines
4.3 KiB
C
148 lines
4.3 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely, subject to the following restrictions:
|
|
|
|
1. The origin of this software must not be misrepresented; you must not
|
|
claim that you wrote the original software. If you use this software
|
|
in a product, an acknowledgment in the product documentation would be
|
|
appreciated but is not required.
|
|
2. Altered source versions must be plainly marked as such, and must not be
|
|
misrepresented as being the original software.
|
|
3. This notice may not be removed or altered from any source distribution.
|
|
*/
|
|
|
|
/**
|
|
* \file SDL_rect.h
|
|
*
|
|
* Header file for SDL_rect definition and management functions.
|
|
*/
|
|
|
|
#ifndef SDL_rect_h_
|
|
#define SDL_rect_h_
|
|
|
|
#include "SDL_stdinc.h"
|
|
#include "SDL_error.h"
|
|
#include "SDL_pixels.h"
|
|
#include "SDL_rwops.h"
|
|
|
|
#include "begin_code.h"
|
|
/* Set up for C function definitions, even when using C++ */
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* \brief The structure that defines a point
|
|
*
|
|
* \sa SDL_EnclosePoints
|
|
* \sa SDL_PointInRect
|
|
*/
|
|
typedef struct SDL_Point
|
|
{
|
|
int x;
|
|
int y;
|
|
} SDL_Point;
|
|
|
|
/**
|
|
* \brief A rectangle, with the origin at the upper left.
|
|
*
|
|
* \sa SDL_RectEmpty
|
|
* \sa SDL_RectEquals
|
|
* \sa SDL_HasIntersection
|
|
* \sa SDL_IntersectRect
|
|
* \sa SDL_UnionRect
|
|
* \sa SDL_EnclosePoints
|
|
*/
|
|
typedef struct SDL_Rect
|
|
{
|
|
int x, y;
|
|
int w, h;
|
|
} SDL_Rect;
|
|
|
|
/**
|
|
* \brief Returns true if point resides inside a rectangle.
|
|
*/
|
|
SDL_FORCE_INLINE SDL_bool SDL_PointInRect(const SDL_Point *p, const SDL_Rect *r)
|
|
{
|
|
return ( (p->x >= r->x) && (p->x < (r->x + r->w)) &&
|
|
(p->y >= r->y) && (p->y < (r->y + r->h)) ) ? SDL_TRUE : SDL_FALSE;
|
|
}
|
|
|
|
/**
|
|
* \brief Returns true if the rectangle has no area.
|
|
*/
|
|
SDL_FORCE_INLINE SDL_bool SDL_RectEmpty(const SDL_Rect *r)
|
|
{
|
|
return ((!r) || (r->w <= 0) || (r->h <= 0)) ? SDL_TRUE : SDL_FALSE;
|
|
}
|
|
|
|
/**
|
|
* \brief Returns true if the two rectangles are equal.
|
|
*/
|
|
SDL_FORCE_INLINE SDL_bool SDL_RectEquals(const SDL_Rect *a, const SDL_Rect *b)
|
|
{
|
|
return (a && b && (a->x == b->x) && (a->y == b->y) &&
|
|
(a->w == b->w) && (a->h == b->h)) ? SDL_TRUE : SDL_FALSE;
|
|
}
|
|
|
|
/**
|
|
* \brief Determine whether two rectangles intersect.
|
|
*
|
|
* \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_HasIntersection(const SDL_Rect * A,
|
|
const SDL_Rect * B);
|
|
|
|
/**
|
|
* \brief Calculate the intersection of two rectangles.
|
|
*
|
|
* \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_IntersectRect(const SDL_Rect * A,
|
|
const SDL_Rect * B,
|
|
SDL_Rect * result);
|
|
|
|
/**
|
|
* \brief Calculate the union of two rectangles.
|
|
*/
|
|
extern DECLSPEC void SDLCALL SDL_UnionRect(const SDL_Rect * A,
|
|
const SDL_Rect * B,
|
|
SDL_Rect * result);
|
|
|
|
/**
|
|
* \brief Calculate a minimal rectangle enclosing a set of points
|
|
*
|
|
* \return SDL_TRUE if any points were within the clipping rect
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_EnclosePoints(const SDL_Point * points,
|
|
int count,
|
|
const SDL_Rect * clip,
|
|
SDL_Rect * result);
|
|
|
|
/**
|
|
* \brief Calculate the intersection of a rectangle and line segment.
|
|
*
|
|
* \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_IntersectRectAndLine(const SDL_Rect *
|
|
rect, int *X1,
|
|
int *Y1, int *X2,
|
|
int *Y2);
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#include "close_code.h"
|
|
|
|
#endif /* SDL_rect_h_ */
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|