windows/rect.c

   1 /*
   2  * Rectangle-related functions
   3  *
   4  * Copyright 1993, 1996 Alexandre Julliard
   5  *
   6  */
   7
   8 #include "winuser.h"
   9 #include "wine/winuser16.h"
  10
  11
  12 /***********************************************************************
  13  *           SetRect16    (USER.72)
  14  */
  15 void WINAPI SetRect16( LPRECT16 rect, INT16 left, INT16 top,
  16                        INT16 right, INT16 bottom )
  17 {
  18     rect->left   = left;
  19     rect->right  = right;
  20     rect->top    = top;
  21     rect->bottom = bottom;
  22 }
  23
  24
  25 /***********************************************************************
  26  *           SetRect32    (USER32.499)
  27  */
  28 BOOL WINAPI SetRect( LPRECT rect, INT left, INT top,
  29                        INT right, INT bottom )
  30 {
  31     rect->left   = left;
  32     rect->right  = right;
  33     rect->top    = top;
  34     rect->bottom = bottom;
  35     return TRUE;
  36 }
  37
  38
  39 /***********************************************************************
  40  *           SetRectEmpty16    (USER.73)
  41  */
  42 void WINAPI SetRectEmpty16( LPRECT16 rect )
  43 {
  44     rect->left = rect->right = rect->top = rect->bottom = 0;
  45 }
  46
  47
  48 /***********************************************************************
  49  *           SetRectEmpty32    (USER32.500)
  50  */
  51 BOOL WINAPI SetRectEmpty( LPRECT rect )
  52 {
  53     rect->left = rect->right = rect->top = rect->bottom = 0;
  54     return TRUE;
  55 }
  56
  57
  58 /***********************************************************************
  59  *           CopyRect16    (USER.74)
  60  */
  61 BOOL16 WINAPI CopyRect16( RECT16 *dest, const RECT16 *src )
  62 {
  63     *dest = *src;
  64     return TRUE;
  65 }
  66
  67
  68 /***********************************************************************
  69  *           CopyRect32    (USER32.62)
  70  */
  71 BOOL WINAPI CopyRect( RECT *dest, const RECT *src )
  72 {
  73     *dest = *src;
  74     return TRUE;
  75 }
  76
  77
  78 /***********************************************************************
  79  *           IsRectEmpty16    (USER.75)
  80  */
  81 BOOL16 WINAPI IsRectEmpty16( const RECT16 *rect )
  82 {
  83     return ((rect->left == rect->right) || (rect->top == rect->bottom));
  84 }
  85
  86
  87 /***********************************************************************
  88  *           IsRectEmpty32    (USER32.347)
  89  */
  90 BOOL WINAPI IsRectEmpty( const RECT *rect )
  91 {
  92     return ((rect->left == rect->right) || (rect->top == rect->bottom));
  93 }
  94
  95
  96 /***********************************************************************
  97  *           PtInRect16    (USER.76)
  98  */
  99 BOOL16 WINAPI PtInRect16( const RECT16 *rect, POINT16 pt )
 100 {
 101     return ((pt.x >= rect->left) && (pt.x < rect->right) &&
 102             (pt.y >= rect->top) && (pt.y < rect->bottom));
 103 }
 104
 105
 106 /***********************************************************************
 107  *           PtInRect32    (USER32.424)
 108  */
 109 BOOL WINAPI PtInRect( const RECT *rect, POINT pt )
 110 {
 111     return ((pt.x >= rect->left) && (pt.x < rect->right) &&
 112             (pt.y >= rect->top) && (pt.y < rect->bottom));
 113 }
 114
 115
 116 /***********************************************************************
 117  *           OffsetRect16    (USER.77)
 118  */
 119 void WINAPI OffsetRect16( LPRECT16 rect, INT16 x, INT16 y )
 120 {
 121     rect->left   += x;
 122     rect->right  += x;
 123     rect->top    += y;
 124     rect->bottom += y;
 125 }
 126
 127
 128 /***********************************************************************
 129  *           OffsetRect32    (USER32.406)
 130  */
 131 BOOL WINAPI OffsetRect( LPRECT rect, INT x, INT y )
 132 {
 133     rect->left   += x;
 134     rect->right  += x;
 135     rect->top    += y;
 136     rect->bottom += y;
 137     return TRUE;
 138 }
 139
 140
 141 /***********************************************************************
 142  *           InflateRect16    (USER.78)
 143  */
 144 void WINAPI InflateRect16( LPRECT16 rect, INT16 x, INT16 y )
 145 {
 146     rect->left   -= x;
 147     rect->top    -= y;
 148     rect->right  += x;
 149     rect->bottom += y;
 150 }
 151
 152
 153 /***********************************************************************
 154  *           InflateRect32    (USER32.321)
 155  */
 156 BOOL WINAPI InflateRect( LPRECT rect, INT x, INT y )
 157 {
 158     rect->left   -= x;
 159     rect->top    -= y;
 160     rect->right  += x;
 161     rect->bottom += y;
 162     return TRUE;
 163 }
 164
 165
 166 /***********************************************************************
 167  *           IntersectRect16    (USER.79)
 168  */
 169 BOOL16 WINAPI IntersectRect16( LPRECT16 dest, const RECT16 *src1,
 170                                const RECT16 *src2 )
 171 {
 172     if (IsRectEmpty16(src1) || IsRectEmpty16(src2) ||
 173         (src1->left >= src2->right) || (src2->left >= src1->right) ||
 174         (src1->top >= src2->bottom) || (src2->top >= src1->bottom))
 175     {
 176         SetRectEmpty16( dest );
 177         return FALSE;
 178     }
 179     dest->left   = MAX( src1->left, src2->left );
 180     dest->right  = MIN( src1->right, src2->right );
 181     dest->top    = MAX( src1->top, src2->top );
 182     dest->bottom = MIN( src1->bottom, src2->bottom );
 183     return TRUE;
 184 }
 185
 186
 187 /***********************************************************************
 188  *           IntersectRect32    (USER32.327)
 189  */
 190 BOOL WINAPI IntersectRect( LPRECT dest, const RECT *src1,
 191                                const RECT *src2 )
 192 {
 193     if (IsRectEmpty(src1) || IsRectEmpty(src2) ||
 194         (src1->left >= src2->right) || (src2->left >= src1->right) ||
 195         (src1->top >= src2->bottom) || (src2->top >= src1->bottom))
 196     {
 197         SetRectEmpty( dest );
 198         return FALSE;
 199     }
 200     dest->left   = MAX( src1->left, src2->left );
 201     dest->right  = MIN( src1->right, src2->right );
 202     dest->top    = MAX( src1->top, src2->top );
 203     dest->bottom = MIN( src1->bottom, src2->bottom );
 204     return TRUE;
 205 }
 206
 207
 208 /***********************************************************************
 209  *           UnionRect16    (USER.80)
 210  */
 211 BOOL16 WINAPI UnionRect16( LPRECT16 dest, const RECT16 *src1,
 212                            const RECT16 *src2 )
 213 {
 214     if (IsRectEmpty16(src1))
 215     {
 216         if (IsRectEmpty16(src2))
 217         {
 218             SetRectEmpty16( dest );
 219             return FALSE;
 220         }
 221         else *dest = *src2;
 222     }
 223     else
 224     {
 225         if (IsRectEmpty16(src2)) *dest = *src1;
 226         else
 227         {
 228             dest->left   = MIN( src1->left, src2->left );
 229             dest->right  = MAX( src1->right, src2->right );
 230             dest->top    = MIN( src1->top, src2->top );
 231             dest->bottom = MAX( src1->bottom, src2->bottom );
 232         }
 233     }
 234     return TRUE;
 235 }
 236
 237
 238 /***********************************************************************
 239  *           UnionRect32    (USER32.559)
 240  */
 241 BOOL WINAPI UnionRect( LPRECT dest, const RECT *src1,
 242                            const RECT *src2 )
 243 {
 244     if (IsRectEmpty(src1))
 245     {
 246         if (IsRectEmpty(src2))
 247         {
 248             SetRectEmpty( dest );
 249             return FALSE;
 250         }
 251         else *dest = *src2;
 252     }
 253     else
 254     {
 255         if (IsRectEmpty(src2)) *dest = *src1;
 256         else
 257         {
 258             dest->left   = MIN( src1->left, src2->left );
 259             dest->right  = MAX( src1->right, src2->right );
 260             dest->top    = MIN( src1->top, src2->top );
 261             dest->bottom = MAX( src1->bottom, src2->bottom );
 262         }
 263     }
 264     return TRUE;
 265 }
 266
 267
 268 /***********************************************************************
 269  *           EqualRect16    (USER.244)
 270  */
 271 BOOL16 WINAPI EqualRect16( const RECT16* rect1, const RECT16* rect2 )
 272 {
 273     return ((rect1->left == rect2->left) && (rect1->right == rect2->right) &&
 274             (rect1->top == rect2->top) && (rect1->bottom == rect2->bottom));
 275 }
 276
 277
 278 /***********************************************************************
 279  *           EqualRect32    (USER32.194)
 280  */
 281 BOOL WINAPI EqualRect( const RECT* rect1, const RECT* rect2 )
 282 {
 283     return ((rect1->left == rect2->left) && (rect1->right == rect2->right) &&
 284             (rect1->top == rect2->top) && (rect1->bottom == rect2->bottom));
 285 }
 286
 287
 288 /***********************************************************************
 289  *           SubtractRect16    (USER.373)
 290  */
 291 BOOL16 WINAPI SubtractRect16( LPRECT16 dest, const RECT16 *src1,
 292                               const RECT16 *src2 )
 293 {
 294     RECT16 tmp;
 295
 296     if (IsRectEmpty16( src1 ))
 297     {
 298         SetRectEmpty16( dest );
 299         return FALSE;
 300     }
 301     *dest = *src1;
 302     if (IntersectRect16( &tmp, src1, src2 ))
 303     {
 304         if (EqualRect16( &tmp, dest ))
 305         {
 306             SetRectEmpty16( dest );
 307             return FALSE;
 308         }
 309         if ((tmp.top == dest->top) && (tmp.bottom == dest->bottom))
 310         {
 311             if (tmp.left == dest->left) dest->left = tmp.right;
 312             else if (tmp.right == dest->right) dest->right = tmp.left;
 313         }
 314         else if ((tmp.left == dest->left) && (tmp.right == dest->right))
 315         {
 316             if (tmp.top == dest->top) dest->top = tmp.bottom;
 317             else if (tmp.bottom == dest->bottom) dest->bottom = tmp.top;
 318         }
 319     }
 320     return TRUE;
 321 }
 322
 323
 324 /***********************************************************************
 325  *           SubtractRect32    (USER32.536)
 326  */
 327 BOOL WINAPI SubtractRect( LPRECT dest, const RECT *src1,
 328                               const RECT *src2 )
 329 {
 330     RECT tmp;
 331
 332     if (IsRectEmpty( src1 ))
 333     {
 334         SetRectEmpty( dest );
 335         return FALSE;
 336     }
 337     *dest = *src1;
 338     if (IntersectRect( &tmp, src1, src2 ))
 339     {
 340         if (EqualRect( &tmp, dest ))
 341         {
 342             SetRectEmpty( dest );
 343             return FALSE;
 344         }
 345         if ((tmp.top == dest->top) && (tmp.bottom == dest->bottom))
 346         {
 347             if (tmp.left == dest->left) dest->left = tmp.right;
 348             else if (tmp.right == dest->right) dest->right = tmp.left;
 349         }
 350         else if ((tmp.left == dest->left) && (tmp.right == dest->right))
 351         {
 352             if (tmp.top == dest->top) dest->top = tmp.bottom;
 353             else if (tmp.bottom == dest->bottom) dest->bottom = tmp.top;
 354         }
 355     }
 356     return TRUE;
 357 }