Mercurial > sdl-ios-xcode
annotate include/SDL_rect.h @ 5275:7aba0406c273
Frank Zago to sdl
The following patch fixes some of the bitrot for the Nintendo DS port.
The support is still basic at the moment, but it allows to run the "general"
test under the current head of tree (parent: 5269:11bd1585efb5 tip).
Most of the patch is mine, but I integrated a couple changes that John
Magnotti posted on Feb 1st.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 12 Feb 2011 11:36:56 -0800 |
parents | b530ef003506 |
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rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
5267 | 3 Copyright (C) 1997-2011 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 |
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23 /** |
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24 * \file SDL_rect.h |
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25 * |
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26 * Header file for SDL_rect definition and management functions. |
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27 */ |
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28 |
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29 #ifndef _SDL_rect_h |
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30 #define _SDL_rect_h |
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31 |
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32 #include "SDL_stdinc.h" |
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33 #include "SDL_error.h" |
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34 #include "SDL_pixels.h" |
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35 #include "SDL_rwops.h" |
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36 |
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37 #include "begin_code.h" |
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38 /* Set up for C function definitions, even when using C++ */ |
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39 #ifdef __cplusplus |
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40 /* *INDENT-OFF* */ |
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41 extern "C" { |
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42 /* *INDENT-ON* */ |
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43 #endif |
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44 |
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45 /** |
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46 * \brief The structure that defines a point |
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47 * |
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48 * \sa SDL_EnclosePoints |
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49 */ |
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50 typedef struct |
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51 { |
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52 int x; |
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53 int y; |
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54 } SDL_Point; |
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55 |
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56 /** |
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57 * \brief A rectangle, with the origin at the upper left. |
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58 * |
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59 * \sa SDL_RectEmpty |
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60 * \sa SDL_RectEquals |
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61 * \sa SDL_HasIntersection |
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62 * \sa SDL_IntersectRect |
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63 * \sa SDL_UnionRect |
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64 * \sa SDL_EnclosePoints |
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65 */ |
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66 typedef struct SDL_Rect |
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67 { |
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68 int x, y; |
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69 int w, h; |
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70 } SDL_Rect; |
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71 |
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72 /** |
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73 * \brief Returns true if the rectangle has no area. |
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74 */ |
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75 #define SDL_RectEmpty(X) (((X)->w <= 0) || ((X)->h <= 0)) |
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76 |
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77 /** |
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78 * \brief Returns true if the two rectangles are equal. |
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79 */ |
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80 #define SDL_RectEquals(A, B) (((A)->x == (B)->x) && ((A)->y == (B)->y) && \ |
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81 ((A)->w == (B)->w) && ((A)->h == (B)->h)) |
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82 |
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83 /** |
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84 * \brief Determine whether two rectangles intersect. |
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85 * |
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86 * \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise. |
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87 */ |
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88 extern DECLSPEC SDL_bool SDLCALL SDL_HasIntersection(const SDL_Rect * A, |
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89 const SDL_Rect * B); |
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90 |
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91 /** |
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92 * \brief Calculate the intersection of two rectangles. |
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93 * |
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94 * \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise. |
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95 */ |
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96 extern DECLSPEC SDL_bool SDLCALL SDL_IntersectRect(const SDL_Rect * A, |
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97 const SDL_Rect * B, |
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98 SDL_Rect * result); |
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99 |
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100 /** |
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101 * \brief Calculate the union of two rectangles. |
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102 */ |
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103 extern DECLSPEC void SDLCALL SDL_UnionRect(const SDL_Rect * A, |
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104 const SDL_Rect * B, |
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105 SDL_Rect * result); |
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106 |
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108 * \brief Calculate a minimal rectangle enclosing a set of points |
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109 * |
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110 * \return SDL_TRUE if any points were within the clipping rect |
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111 */ |
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112 extern DECLSPEC SDL_bool SDLCALL SDL_EnclosePoints(const SDL_Point * points, |
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113 int count, |
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114 const SDL_Rect * clip, |
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115 SDL_Rect * result); |
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116 |
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117 /** |
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118 * \brief Calculate the intersection of a rectangle and line segment. |
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119 * |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
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120 * \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise. |
2909 | 121 */ |
122 extern DECLSPEC SDL_bool SDLCALL SDL_IntersectRectAndLine(const SDL_Rect * | |
123 rect, int *X1, | |
124 int *Y1, int *X2, | |
125 int *Y2); | |
126 | |
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127 /* Ends C function definitions when using C++ */ |
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128 #ifdef __cplusplus |
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129 /* *INDENT-OFF* */ |
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130 } |
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131 /* *INDENT-ON* */ |
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132 #endif |
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133 #include "close_code.h" |
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134 |
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135 #endif /* _SDL_rect_h */ |
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136 |
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137 /* vi: set ts=4 sw=4 expandtab: */ |