windows/rect.c

   1 /*
   2  * Rectangle-related functions
   3  *
   4  * Copyright 1993, 1996 Alexandre Julliard
   5  *
   6  */
   7
   8 #include "windef.h"
   9 #include "wingdi.h"
  10 #include "wine/winuser16.h"
  11 #include "winuser.h"
  12
  13 /***********************************************************************
  14  *           SetRect16    (USER.72)
  15  */
  16 void WINAPI SetRect16( LPRECT16 rect, INT16 left, INT16 top,
  17                        INT16 right, INT16 bottom )
  18 {
  19     rect->left   = left;
  20     rect->right  = right;
  21     rect->top    = top;
  22     rect->bottom = bottom;
  23 }
  24
  25
  26 /***********************************************************************
  27  *           SetRect32    (USER32.499)
  28  */
  29 BOOL WINAPI SetRect( LPRECT rect, INT left, INT top,
  30                        INT right, INT bottom )
  31 {
  32     rect->left   = left;
  33     rect->right  = right;
  34     rect->top    = top;
  35     rect->bottom = bottom;
  36     return TRUE;
  37 }
  38
  39
  40 /***********************************************************************
  41  *           SetRectEmpty16    (USER.73)
  42  */
  43 void WINAPI SetRectEmpty16( LPRECT16 rect )
  44 {
  45     rect->left = rect->right = rect->top = rect->bottom = 0;
  46 }
  47
  48
  49 /***********************************************************************
  50  *           SetRectEmpty32    (USER32.500)
  51  */
  52 BOOL WINAPI SetRectEmpty( LPRECT rect )
  53 {
  54     rect->left = rect->right = rect->top = rect->bottom = 0;
  55     return TRUE;
  56 }
  57
  58
  59 /***********************************************************************
  60  *           CopyRect16    (USER.74)
  61  */
  62 BOOL16 WINAPI CopyRect16( RECT16 *dest, const RECT16 *src )
  63 {
  64     *dest = *src;
  65     return TRUE;
  66 }
  67
  68
  69 /***********************************************************************
  70  *           CopyRect32    (USER32.62)
  71  */
  72 BOOL WINAPI CopyRect( RECT *dest, const RECT *src )
  73 {
  74     if (!dest || !src)
  75         return FALSE;
  76     *dest = *src;
  77     return TRUE;
  78 }
  79
  80
  81 /***********************************************************************
  82  *           IsRectEmpty16    (USER.75)
  83  */
  84 BOOL16 WINAPI IsRectEmpty16( const RECT16 *rect )
  85 {
  86     return ((rect->left == rect->right) || (rect->top == rect->bottom));
  87 }
  88
  89
  90 /***********************************************************************
  91  *           IsRectEmpty32    (USER32.347)
  92  */
  93 BOOL WINAPI IsRectEmpty( const RECT *rect )
  94 {
  95     return ((rect->left == rect->right) || (rect->top == rect->bottom));
  96 }
  97
  98
  99 /***********************************************************************
 100  *           PtInRect16    (USER.76)
 101  */
 102 BOOL16 WINAPI PtInRect16( const RECT16 *rect, POINT16 pt )
 103 {
 104     return ((pt.x >= rect->left) && (pt.x < rect->right) &&
 105             (pt.y >= rect->top) && (pt.y < rect->bottom));
 106 }
 107
 108
 109 /***********************************************************************
 110  *           PtInRect32    (USER32.424)
 111  */
 112 BOOL WINAPI PtInRect( const RECT *rect, POINT pt )
 113 {
 114     return ((pt.x >= rect->left) && (pt.x < rect->right) &&
 115             (pt.y >= rect->top) && (pt.y < rect->bottom));
 116 }
 117
 118
 119 /***********************************************************************
 120  *           OffsetRect16    (USER.77)
 121  */
 122 void WINAPI OffsetRect16( LPRECT16 rect, INT16 x, INT16 y )
 123 {
 124     rect->left   += x;
 125     rect->right  += x;
 126     rect->top    += y;
 127     rect->bottom += y;
 128 }
 129
 130
 131 /***********************************************************************
 132  *           OffsetRect32    (USER32.406)
 133  */
 134 BOOL WINAPI OffsetRect( LPRECT rect, INT x, INT y )
 135 {
 136     rect->left   += x;
 137     rect->right  += x;
 138     rect->top    += y;
 139     rect->bottom += y;
 140     return TRUE;
 141 }
 142
 143
 144 /***********************************************************************
 145  *           InflateRect16    (USER.78)
 146  */
 147 void WINAPI InflateRect16( LPRECT16 rect, INT16 x, INT16 y )
 148 {
 149     rect->left   -= x;
 150     rect->top    -= y;
 151     rect->right  += x;
 152     rect->bottom += y;
 153 }
 154
 155
 156 /***********************************************************************
 157  *           InflateRect32    (USER32.321)
 158  */
 159 BOOL WINAPI InflateRect( LPRECT rect, INT x, INT y )
 160 {
 161     rect->left   -= x;
 162     rect->top    -= y;
 163     rect->right  += x;
 164     rect->bottom += y;
 165     return TRUE;
 166 }
 167
 168
 169 /***********************************************************************
 170  *           IntersectRect16    (USER.79)
 171  */
 172 BOOL16 WINAPI IntersectRect16( LPRECT16 dest, const RECT16 *src1,
 173                                const RECT16 *src2 )
 174 {
 175     if (IsRectEmpty16(src1) || IsRectEmpty16(src2) ||
 176         (src1->left >= src2->right) || (src2->left >= src1->right) ||
 177         (src1->top >= src2->bottom) || (src2->top >= src1->bottom))
 178     {
 179         SetRectEmpty16( dest );
 180         return FALSE;
 181     }
 182     dest->left   = MAX( src1->left, src2->left );
 183     dest->right  = MIN( src1->right, src2->right );
 184     dest->top    = MAX( src1->top, src2->top );
 185     dest->bottom = MIN( src1->bottom, src2->bottom );
 186     return TRUE;
 187 }
 188
 189
 190 /***********************************************************************
 191  *           IntersectRect32    (USER32.327)
 192  */
 193 BOOL WINAPI IntersectRect( LPRECT dest, const RECT *src1,
 194                                const RECT *src2 )
 195 {
 196     if (IsRectEmpty(src1) || IsRectEmpty(src2) ||
 197         (src1->left >= src2->right) || (src2->left >= src1->right) ||
 198         (src1->top >= src2->bottom) || (src2->top >= src1->bottom))
 199     {
 200         SetRectEmpty( dest );
 201         return FALSE;
 202     }
 203     dest->left   = MAX( src1->left, src2->left );
 204     dest->right  = MIN( src1->right, src2->right );
 205     dest->top    = MAX( src1->top, src2->top );
 206     dest->bottom = MIN( src1->bottom, src2->bottom );
 207     return TRUE;
 208 }
 209
 210
 211 /***********************************************************************
 212  *           UnionRect16    (USER.80)
 213  */
 214 BOOL16 WINAPI UnionRect16( LPRECT16 dest, const RECT16 *src1,
 215                            const RECT16 *src2 )
 216 {
 217     if (IsRectEmpty16(src1))
 218     {
 219         if (IsRectEmpty16(src2))
 220         {
 221             SetRectEmpty16( dest );
 222             return FALSE;
 223         }
 224         else *dest = *src2;
 225     }
 226     else
 227     {
 228         if (IsRectEmpty16(src2)) *dest = *src1;
 229         else
 230         {
 231             dest->left   = MIN( src1->left, src2->left );
 232             dest->right  = MAX( src1->right, src2->right );
 233             dest->top    = MIN( src1->top, src2->top );
 234             dest->bottom = MAX( src1->bottom, src2->bottom );
 235         }
 236     }
 237     return TRUE;
 238 }
 239
 240
 241 /***********************************************************************
 242  *           UnionRect32    (USER32.559)
 243  */
 244 BOOL WINAPI UnionRect( LPRECT dest, const RECT *src1,
 245                            const RECT *src2 )
 246 {
 247     if (IsRectEmpty(src1))
 248     {
 249         if (IsRectEmpty(src2))
 250         {
 251             SetRectEmpty( dest );
 252             return FALSE;
 253         }
 254         else *dest = *src2;
 255     }
 256     else
 257     {
 258         if (IsRectEmpty(src2)) *dest = *src1;
 259         else
 260         {
 261             dest->left   = MIN( src1->left, src2->left );
 262             dest->right  = MAX( src1->right, src2->right );
 263             dest->top    = MIN( src1->top, src2->top );
 264             dest->bottom = MAX( src1->bottom, src2->bottom );
 265         }
 266     }
 267     return TRUE;
 268 }
 269
 270
 271 /***********************************************************************
 272  *           EqualRect16    (USER.244)
 273  */
 274 BOOL16 WINAPI EqualRect16( const RECT16* rect1, const RECT16* rect2 )
 275 {
 276     return ((rect1->left == rect2->left) && (rect1->right == rect2->right) &&
 277             (rect1->top == rect2->top) && (rect1->bottom == rect2->bottom));
 278 }
 279
 280
 281 /***********************************************************************
 282  *           EqualRect32    (USER32.194)
 283  */
 284 BOOL WINAPI EqualRect( const RECT* rect1, const RECT* rect2 )
 285 {
 286     return ((rect1->left == rect2->left) && (rect1->right == rect2->right) &&
 287             (rect1->top == rect2->top) && (rect1->bottom == rect2->bottom));
 288 }
 289
 290
 291 /***********************************************************************
 292  *           SubtractRect16    (USER.373)
 293  */
 294 BOOL16 WINAPI SubtractRect16( LPRECT16 dest, const RECT16 *src1,
 295                               const RECT16 *src2 )
 296 {
 297     RECT16 tmp;
 298
 299     if (IsRectEmpty16( src1 ))
 300     {
 301         SetRectEmpty16( dest );
 302         return FALSE;
 303     }
 304     *dest = *src1;
 305     if (IntersectRect16( &tmp, src1, src2 ))
 306     {
 307         if (EqualRect16( &tmp, dest ))
 308         {
 309             SetRectEmpty16( dest );
 310             return FALSE;
 311         }
 312         if ((tmp.top == dest->top) && (tmp.bottom == dest->bottom))
 313         {
 314             if (tmp.left == dest->left) dest->left = tmp.right;
 315             else if (tmp.right == dest->right) dest->right = tmp.left;
 316         }
 317         else if ((tmp.left == dest->left) && (tmp.right == dest->right))
 318         {
 319             if (tmp.top == dest->top) dest->top = tmp.bottom;
 320             else if (tmp.bottom == dest->bottom) dest->bottom = tmp.top;
 321         }
 322     }
 323     return TRUE;
 324 }
 325
 326
 327 /***********************************************************************
 328  *           SubtractRect32    (USER32.536)
 329  */
 330 BOOL WINAPI SubtractRect( LPRECT dest, const RECT *src1,
 331                               const RECT *src2 )
 332 {
 333     RECT tmp;
 334
 335     if (IsRectEmpty( src1 ))
 336     {
 337         SetRectEmpty( dest );
 338         return FALSE;
 339     }
 340     *dest = *src1;
 341     if (IntersectRect( &tmp, src1, src2 ))
 342     {
 343         if (EqualRect( &tmp, dest ))
 344         {
 345             SetRectEmpty( dest );
 346             return FALSE;
 347         }
 348         if ((tmp.top == dest->top) && (tmp.bottom == dest->bottom))
 349         {
 350             if (tmp.left == dest->left) dest->left = tmp.right;
 351             else if (tmp.right == dest->right) dest->right = tmp.left;
 352         }
 353         else if ((tmp.left == dest->left) && (tmp.right == dest->right))
 354         {
 355             if (tmp.top == dest->top) dest->top = tmp.bottom;
 356             else if (tmp.bottom == dest->bottom) dest->bottom = tmp.top;
 357         }
 358     }
 359     return TRUE;
 360 }