Rev 1 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | pmbaty | 1 | /* |
| 2 | Simple DirectMedia Layer |
||
| 8 | pmbaty | 3 | Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org> |
| 1 | pmbaty | 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 |
||
| 39 | extern "C" { |
||
| 40 | #endif |
||
| 41 | |||
| 42 | /** |
||
| 43 | * \brief The structure that defines a point |
||
| 44 | * |
||
| 45 | * \sa SDL_EnclosePoints |
||
| 46 | * \sa SDL_PointInRect |
||
| 47 | */ |
||
| 48 | typedef struct SDL_Point |
||
| 49 | { |
||
| 50 | int x; |
||
| 51 | int y; |
||
| 52 | } SDL_Point; |
||
| 53 | |||
| 54 | /** |
||
| 55 | * \brief A rectangle, with the origin at the upper left. |
||
| 56 | * |
||
| 57 | * \sa SDL_RectEmpty |
||
| 58 | * \sa SDL_RectEquals |
||
| 59 | * \sa SDL_HasIntersection |
||
| 60 | * \sa SDL_IntersectRect |
||
| 61 | * \sa SDL_UnionRect |
||
| 62 | * \sa SDL_EnclosePoints |
||
| 63 | */ |
||
| 64 | typedef struct SDL_Rect |
||
| 65 | { |
||
| 66 | int x, y; |
||
| 67 | int w, h; |
||
| 68 | } SDL_Rect; |
||
| 69 | |||
| 70 | /** |
||
| 71 | * \brief Returns true if point resides inside a rectangle. |
||
| 72 | */ |
||
| 73 | SDL_FORCE_INLINE SDL_bool SDL_PointInRect(const SDL_Point *p, const SDL_Rect *r) |
||
| 74 | { |
||
| 75 | return ( (p->x >= r->x) && (p->x < (r->x + r->w)) && |
||
| 76 | (p->y >= r->y) && (p->y < (r->y + r->h)) ) ? SDL_TRUE : SDL_FALSE; |
||
| 77 | } |
||
| 78 | |||
| 79 | /** |
||
| 80 | * \brief Returns true if the rectangle has no area. |
||
| 81 | */ |
||
| 82 | SDL_FORCE_INLINE SDL_bool SDL_RectEmpty(const SDL_Rect *r) |
||
| 83 | { |
||
| 84 | return ((!r) || (r->w <= 0) || (r->h <= 0)) ? SDL_TRUE : SDL_FALSE; |
||
| 85 | } |
||
| 86 | |||
| 87 | /** |
||
| 88 | * \brief Returns true if the two rectangles are equal. |
||
| 89 | */ |
||
| 90 | SDL_FORCE_INLINE SDL_bool SDL_RectEquals(const SDL_Rect *a, const SDL_Rect *b) |
||
| 91 | { |
||
| 92 | return (a && b && (a->x == b->x) && (a->y == b->y) && |
||
| 93 | (a->w == b->w) && (a->h == b->h)) ? SDL_TRUE : SDL_FALSE; |
||
| 94 | } |
||
| 95 | |||
| 96 | /** |
||
| 97 | * \brief Determine whether two rectangles intersect. |
||
| 98 | * |
||
| 99 | * \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise. |
||
| 100 | */ |
||
| 101 | extern DECLSPEC SDL_bool SDLCALL SDL_HasIntersection(const SDL_Rect * A, |
||
| 102 | const SDL_Rect * B); |
||
| 103 | |||
| 104 | /** |
||
| 105 | * \brief Calculate the intersection of two rectangles. |
||
| 106 | * |
||
| 107 | * \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise. |
||
| 108 | */ |
||
| 109 | extern DECLSPEC SDL_bool SDLCALL SDL_IntersectRect(const SDL_Rect * A, |
||
| 110 | const SDL_Rect * B, |
||
| 111 | SDL_Rect * result); |
||
| 112 | |||
| 113 | /** |
||
| 114 | * \brief Calculate the union of two rectangles. |
||
| 115 | */ |
||
| 116 | extern DECLSPEC void SDLCALL SDL_UnionRect(const SDL_Rect * A, |
||
| 117 | const SDL_Rect * B, |
||
| 118 | SDL_Rect * result); |
||
| 119 | |||
| 120 | /** |
||
| 121 | * \brief Calculate a minimal rectangle enclosing a set of points |
||
| 122 | * |
||
| 123 | * \return SDL_TRUE if any points were within the clipping rect |
||
| 124 | */ |
||
| 125 | extern DECLSPEC SDL_bool SDLCALL SDL_EnclosePoints(const SDL_Point * points, |
||
| 126 | int count, |
||
| 127 | const SDL_Rect * clip, |
||
| 128 | SDL_Rect * result); |
||
| 129 | |||
| 130 | /** |
||
| 131 | * \brief Calculate the intersection of a rectangle and line segment. |
||
| 132 | * |
||
| 133 | * \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise. |
||
| 134 | */ |
||
| 135 | extern DECLSPEC SDL_bool SDLCALL SDL_IntersectRectAndLine(const SDL_Rect * |
||
| 136 | rect, int *X1, |
||
| 137 | int *Y1, int *X2, |
||
| 138 | int *Y2); |
||
| 139 | |||
| 140 | /* Ends C function definitions when using C++ */ |
||
| 141 | #ifdef __cplusplus |
||
| 142 | } |
||
| 143 | #endif |
||
| 144 | #include "close_code.h" |
||
| 145 | |||
| 146 | #endif /* SDL_rect_h_ */ |
||
| 147 | |||
| 148 | /* vi: set ts=4 sw=4 expandtab: */ |