windows/rect.c

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