cscg22-gearboy

CSCG 2022 Challenge 'Gearboy'
git clone https://git.sinitax.com/sinitax/cscg22-gearboy
Log | Files | Refs | sfeed.txt

SDL_rect.h (4839B)

      1/*
      2  Simple DirectMedia Layer
      3  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
      4
      5  This software is provided 'as-is', without any express or implied
      6  warranty.  In no event will the authors be held liable for any damages
      7  arising from the use of this software.
      8
      9  Permission is granted to anyone to use this software for any purpose,
     10  including commercial applications, and to alter it and redistribute it
     11  freely, subject to the following restrictions:
     12
     13  1. The origin of this software must not be misrepresented; you must not
     14     claim that you wrote the original software. If you use this software
     15     in a product, an acknowledgment in the product documentation would be
     16     appreciated but is not required.
     17  2. Altered source versions must be plainly marked as such, and must not be
     18     misrepresented as being the original software.
     19  3. This notice may not be removed or altered from any source distribution.
     20*/
     21
     22/**
     23 *  \file SDL_rect.h
     24 *
     25 *  Header file for SDL_rect definition and management functions.
     26 */
     27
     28#ifndef SDL_rect_h_
     29#define SDL_rect_h_
     30
     31#include "SDL_stdinc.h"
     32#include "SDL_error.h"
     33#include "SDL_pixels.h"
     34#include "SDL_rwops.h"
     35
     36#include "begin_code.h"
     37/* Set up for C function definitions, even when using C++ */
     38#ifdef __cplusplus
     39extern "C" {
     40#endif
     41
     42/**
     43 *  \brief  The structure that defines a point (integer)
     44 *
     45 *  \sa SDL_EnclosePoints
     46 *  \sa SDL_PointInRect
     47 */
     48typedef struct SDL_Point
     49{
     50    int x;
     51    int y;
     52} SDL_Point;
     53
     54/**
     55 *  \brief  The structure that defines a point (floating point)
     56 *
     57 *  \sa SDL_EnclosePoints
     58 *  \sa SDL_PointInRect
     59 */
     60typedef struct SDL_FPoint
     61{
     62    float x;
     63    float y;
     64} SDL_FPoint;
     65
     66
     67/**
     68 *  \brief A rectangle, with the origin at the upper left (integer).
     69 *
     70 *  \sa SDL_RectEmpty
     71 *  \sa SDL_RectEquals
     72 *  \sa SDL_HasIntersection
     73 *  \sa SDL_IntersectRect
     74 *  \sa SDL_UnionRect
     75 *  \sa SDL_EnclosePoints
     76 */
     77typedef struct SDL_Rect
     78{
     79    int x, y;
     80    int w, h;
     81} SDL_Rect;
     82
     83
     84/**
     85 *  \brief A rectangle, with the origin at the upper left (floating point).
     86 */
     87typedef struct SDL_FRect
     88{
     89    float x;
     90    float y;
     91    float w;
     92    float h;
     93} SDL_FRect;
     94
     95
     96/**
     97 *  \brief Returns true if point resides inside a rectangle.
     98 */
     99SDL_FORCE_INLINE SDL_bool SDL_PointInRect(const SDL_Point *p, const SDL_Rect *r)
    100{
    101    return ( (p->x >= r->x) && (p->x < (r->x + r->w)) &&
    102             (p->y >= r->y) && (p->y < (r->y + r->h)) ) ? SDL_TRUE : SDL_FALSE;
    103}
    104
    105/**
    106 *  \brief Returns true if the rectangle has no area.
    107 */
    108SDL_FORCE_INLINE SDL_bool SDL_RectEmpty(const SDL_Rect *r)
    109{
    110    return ((!r) || (r->w <= 0) || (r->h <= 0)) ? SDL_TRUE : SDL_FALSE;
    111}
    112
    113/**
    114 *  \brief Returns true if the two rectangles are equal.
    115 */
    116SDL_FORCE_INLINE SDL_bool SDL_RectEquals(const SDL_Rect *a, const SDL_Rect *b)
    117{
    118    return (a && b && (a->x == b->x) && (a->y == b->y) &&
    119            (a->w == b->w) && (a->h == b->h)) ? SDL_TRUE : SDL_FALSE;
    120}
    121
    122/**
    123 *  \brief Determine whether two rectangles intersect.
    124 *
    125 *  \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
    126 */
    127extern DECLSPEC SDL_bool SDLCALL SDL_HasIntersection(const SDL_Rect * A,
    128                                                     const SDL_Rect * B);
    129
    130/**
    131 *  \brief Calculate the intersection of two rectangles.
    132 *
    133 *  \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
    134 */
    135extern DECLSPEC SDL_bool SDLCALL SDL_IntersectRect(const SDL_Rect * A,
    136                                                   const SDL_Rect * B,
    137                                                   SDL_Rect * result);
    138
    139/**
    140 *  \brief Calculate the union of two rectangles.
    141 */
    142extern DECLSPEC void SDLCALL SDL_UnionRect(const SDL_Rect * A,
    143                                           const SDL_Rect * B,
    144                                           SDL_Rect * result);
    145
    146/**
    147 *  \brief Calculate a minimal rectangle enclosing a set of points
    148 *
    149 *  \return SDL_TRUE if any points were within the clipping rect
    150 */
    151extern DECLSPEC SDL_bool SDLCALL SDL_EnclosePoints(const SDL_Point * points,
    152                                                   int count,
    153                                                   const SDL_Rect * clip,
    154                                                   SDL_Rect * result);
    155
    156/**
    157 *  \brief Calculate the intersection of a rectangle and line segment.
    158 *
    159 *  \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
    160 */
    161extern DECLSPEC SDL_bool SDLCALL SDL_IntersectRectAndLine(const SDL_Rect *
    162                                                          rect, int *X1,
    163                                                          int *Y1, int *X2,
    164                                                          int *Y2);
    165
    166/* Ends C function definitions when using C++ */
    167#ifdef __cplusplus
    168}
    169#endif
    170#include "close_code.h"
    171
    172#endif /* SDL_rect_h_ */
    173
    174/* vi: set ts=4 sw=4 expandtab: */