src/x11/region.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // File:      region.cpp
   3 // Purpose:   Region class
   4 // Author:    Julian Smart, Robert Roebling
   5 // Created:   Fri Oct 24 10:46:34 MET 1997
   6 // RCS-ID:    $Id$
   7 // Copyright: (c) 1997 Julian Smart, Robert Roebling
   8 // Licence:   wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 #include "wx/region.h"
  12 #include "wx/gdicmn.h"
  13 #include "wx/log.h"
  14
  15 #ifdef __VMS__
  16 #pragma message disable nosimpint
  17 #endif
  18 #include "wx/x11/private.h"
  19 #include "X11/Xutil.h"
  20 #ifdef __VMS__
  21 #pragma message enable nosimpint
  22 #endif
  23
  24 // ----------------------------------------------------------------------------
  25 // wxRegionRefData: private class containing the information about the region
  26 // ----------------------------------------------------------------------------
  27
  28 class wxRegionRefData : public wxObjectRefData
  29 {
  30 public:
  31     wxRegionRefData()
  32     {
  33         m_region = NULL;
  34     }
  35
  36     wxRegionRefData(const wxRegionRefData& refData)
  37     {
  38         m_region = XCreateRegion();
  39         XUnionRegion( refData.m_region, m_region, m_region );
  40     }
  41
  42     ~wxRegionRefData()
  43     {
  44         if (m_region)
  45             XDestroyRegion( m_region );
  46     }
  47
  48     Region m_region;
  49 };
  50
  51 // ----------------------------------------------------------------------------
  52 // macros
  53 // ----------------------------------------------------------------------------
  54
  55 #define M_REGIONDATA ((wxRegionRefData *)m_refData)
  56 #define M_REGIONDATA_OF(rgn) ((wxRegionRefData *)(rgn.m_refData))
  57
  58 IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject);
  59 IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator,wxObject);
  60
  61 // ----------------------------------------------------------------------------
  62 // wxRegion construction
  63 // ----------------------------------------------------------------------------
  64
  65 #define M_REGIONDATA ((wxRegionRefData *)m_refData)
  66
  67 void wxRegion::InitRect(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
  68 {
  69     XRectangle rect;
  70     rect.x = x;
  71     rect.y = y;
  72     rect.width = w;
  73     rect.height = h;
  74
  75     m_refData = new wxRegionRefData();
  76
  77     M_REGIONDATA->m_region = XCreateRegion();
  78     XUnionRectWithRegion( &rect, M_REGIONDATA->m_region, M_REGIONDATA->m_region );
  79 }
  80
  81 wxRegion::wxRegion( size_t n, const wxPoint *points, int fillStyle )
  82 {
  83 #if 0
  84     XPoint *xpoints = new XPoint[n];
  85     for ( size_t i = 0 ; i < n ; i++ )
  86     {
  87         xpoints[i].x = points[i].x;
  88         xpoints[i].y = points[i].y;
  89     }
  90
  91     m_refData = new wxRegionRefData();
  92
  93     Region* reg = gdk_region_polygon
  94                      (
  95                         gdkpoints,
  96                         n,
  97                         fillStyle == wxWINDING_RULE ? GDK_WINDING_RULE
  98                                                     : GDK_EVEN_ODD_RULE
  99                      );
 100
 101     M_REGIONDATA->m_region = reg;
 102
 103     delete [] xpoints;
 104 #endif
 105 }
 106
 107 wxRegion::~wxRegion()
 108 {
 109     // m_refData unrefed in ~wxObject
 110 }
 111
 112 wxObjectRefData *wxRegion::CreateRefData() const
 113 {
 114     return new wxRegionRefData;
 115 }
 116
 117 wxObjectRefData *wxRegion::CloneRefData(const wxObjectRefData *data) const
 118 {
 119     return new wxRegionRefData(*(wxRegionRefData *)data);
 120 }
 121
 122 // ----------------------------------------------------------------------------
 123 // wxRegion comparison
 124 // ----------------------------------------------------------------------------
 125
 126 bool wxRegion::operator==( const wxRegion& region ) const
 127 {
 128     if (m_refData == region.m_refData) return TRUE;
 129
 130     if (!m_refData || !region.m_refData) return FALSE;
 131
 132     // compare the regions themselves, not the pointers to ref data!
 133     return XEqualRegion( M_REGIONDATA->m_region,
 134                          M_REGIONDATA_OF(region)->m_region );
 135 }
 136
 137 // ----------------------------------------------------------------------------
 138 // wxRegion operations
 139 // ----------------------------------------------------------------------------
 140
 141 void wxRegion::Clear()
 142 {
 143     UnRef();
 144 }
 145
 146 bool wxRegion::Union( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 147 {
 148     // work around for XUnionRectWithRegion() bug: taking a union with an empty
 149     // rect results in an empty region (at least XFree 3.3.6 and 4.0 have this
 150     // problem)
 151     if ( !width || !height )
 152         return TRUE;
 153
 154     XRectangle rect;
 155     rect.x = x;
 156     rect.y = y;
 157     rect.width = width;
 158     rect.height = height;
 159
 160     if (!m_refData)
 161     {
 162         m_refData = new wxRegionRefData();
 163         M_REGIONDATA->m_region = XCreateRegion();
 164         XUnionRectWithRegion( &rect, M_REGIONDATA->m_region, M_REGIONDATA->m_region );
 165     }
 166     else
 167     {
 168         AllocExclusive();
 169
 170         XUnionRectWithRegion( &rect, M_REGIONDATA->m_region, M_REGIONDATA->m_region );
 171     }
 172
 173     return TRUE;
 174 }
 175
 176 bool wxRegion::Union( const wxRect& rect )
 177 {
 178     return Union( rect.x, rect.y, rect.width, rect.height );
 179 }
 180
 181 bool wxRegion::Union( const wxRegion& region )
 182 {
 183     if (region.IsNull())
 184         return FALSE;
 185
 186     if (!m_refData)
 187     {
 188         m_refData = new wxRegionRefData();
 189         M_REGIONDATA->m_region = XCreateRegion();
 190     }
 191     else
 192     {
 193         AllocExclusive();
 194     }
 195
 196     XUnionRegion( M_REGIONDATA->m_region,
 197                   M_REGIONDATA_OF(region)->m_region,
 198                   M_REGIONDATA->m_region );
 199
 200     return TRUE;
 201 }
 202
 203 bool wxRegion::Intersect( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 204 {
 205     wxRegion reg( x, y, width, height );
 206
 207     return Intersect( reg );
 208 }
 209
 210 bool wxRegion::Intersect( const wxRect& rect )
 211 {
 212     wxRegion reg( rect );
 213
 214     return Intersect( reg );
 215 }
 216
 217 bool wxRegion::Intersect( const wxRegion& region )
 218 {
 219     if (region.IsNull())
 220         return FALSE;
 221
 222     if (!m_refData)
 223     {
 224         m_refData = new wxRegionRefData();
 225         M_REGIONDATA->m_region = XCreateRegion();
 226
 227         // leave here
 228         return TRUE;
 229     }
 230     else
 231     {
 232         AllocExclusive();
 233     }
 234
 235     XIntersectRegion( M_REGIONDATA->m_region,
 236                       M_REGIONDATA_OF(region)->m_region,
 237                       M_REGIONDATA->m_region );
 238
 239     return TRUE;
 240 }
 241
 242 bool wxRegion::Subtract( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 243 {
 244     wxRegion reg( x, y, width, height );
 245     return Subtract( reg );
 246 }
 247
 248 bool wxRegion::Subtract( const wxRect& rect )
 249 {
 250     wxRegion reg( rect );
 251     return Subtract( reg );
 252 }
 253
 254 bool wxRegion::Subtract( const wxRegion& region )
 255 {
 256     if (region.IsNull())
 257         return FALSE;
 258
 259     if (!m_refData)
 260     {
 261         m_refData = new wxRegionRefData();
 262         M_REGIONDATA->m_region = XCreateRegion();
 263     }
 264     else
 265     {
 266         AllocExclusive();
 267     }
 268
 269     XSubtractRegion( M_REGIONDATA->m_region,
 270                      M_REGIONDATA_OF(region)->m_region,
 271                      M_REGIONDATA->m_region );
 272
 273     return TRUE;
 274 }
 275
 276 bool wxRegion::Xor( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 277 {
 278     wxRegion reg( x, y, width, height );
 279     return Xor( reg );
 280 }
 281
 282 bool wxRegion::Xor( const wxRect& rect )
 283 {
 284     wxRegion reg( rect );
 285     return Xor( reg );
 286 }
 287
 288 bool wxRegion::Xor( const wxRegion& region )
 289 {
 290     if (region.IsNull())
 291         return FALSE;
 292
 293     if (!m_refData)
 294     {
 295         m_refData = new wxRegionRefData();
 296         M_REGIONDATA->m_region = XCreateRegion();
 297     }
 298     else
 299     {
 300         AllocExclusive();
 301     }
 302
 303     XXorRegion( M_REGIONDATA->m_region,
 304                 M_REGIONDATA_OF(region)->m_region,
 305                 M_REGIONDATA->m_region );
 306
 307     return TRUE;
 308 }
 309
 310 // ----------------------------------------------------------------------------
 311 // wxRegion tests
 312 // ----------------------------------------------------------------------------
 313
 314 void wxRegion::GetBox( wxCoord &x, wxCoord &y, wxCoord &w, wxCoord &h ) const
 315 {
 316     if (m_refData)
 317     {
 318         XRectangle rect;
 319         XClipBox( M_REGIONDATA->m_region, &rect );
 320         x = rect.x;
 321         y = rect.y;
 322         w = rect.width;
 323         h = rect.height;
 324     }
 325     else
 326     {
 327         x = 0;
 328         y = 0;
 329         w = -1;
 330         h = -1;
 331     }
 332 }
 333
 334 wxRect wxRegion::GetBox() const
 335 {
 336     wxCoord x, y, w, h;
 337     GetBox( x, y, w, h );
 338     return wxRect( x, y, w, h );
 339 }
 340
 341 bool wxRegion::Offset( wxCoord x, wxCoord y )
 342 {
 343     if (!m_refData)
 344         return FALSE;
 345
 346     AllocExclusive();
 347
 348     XOffsetRegion( M_REGIONDATA->m_region, x, y );
 349
 350     return TRUE;
 351 }
 352
 353 bool wxRegion::Empty() const
 354 {
 355     if (!m_refData)
 356         return TRUE;
 357
 358     return XEmptyRegion( M_REGIONDATA->m_region );
 359 }
 360
 361 wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y ) const
 362 {
 363     if (!m_refData)
 364         return wxOutRegion;
 365
 366     if (XPointInRegion( M_REGIONDATA->m_region, x, y ))
 367         return wxInRegion;
 368     else
 369         return wxOutRegion;
 370 }
 371
 372 wxRegionContain wxRegion::Contains( wxCoord x, wxCoord y, wxCoord w, wxCoord h ) const
 373 {
 374     if (!m_refData)
 375         return wxOutRegion;
 376
 377     int res = XRectInRegion( M_REGIONDATA->m_region, x, y, w, h );
 378     switch (res)
 379     {
 380         case RectangleIn:   return wxInRegion;
 381         case RectangleOut:  return wxOutRegion;
 382         case RectanglePart: return wxPartRegion;
 383     }
 384     return wxOutRegion;
 385 }
 386
 387 wxRegionContain wxRegion::Contains(const wxPoint& pt) const
 388 {
 389     return Contains( pt.x, pt.y );
 390 }
 391
 392 wxRegionContain wxRegion::Contains(const wxRect& rect) const
 393 {
 394     return Contains( rect.x, rect.y, rect.width, rect.height );
 395 }
 396
 397 WXRegion *wxRegion::GetX11Region() const
 398 {
 399     if (!m_refData)
 400         return (WXRegion*) NULL;
 401
 402     return (WXRegion*) M_REGIONDATA->m_region;
 403 }
 404
 405 // ----------------------------------------------------------------------------
 406 // wxRegionIterator
 407 // ----------------------------------------------------------------------------
 408
 409 // the following structures must match the private structures
 410 // in X11 region code ( xc/lib/X11/region.h )
 411
 412 // this makes the Region type transparent
 413 // and we have access to the region rectangles
 414
 415 struct _XBox {
 416     short x1, x2, y1, y2;
 417 };
 418
 419 struct _XRegion {
 420     long   size , numRects;
 421     _XBox *rects, extents;
 422 };
 423
 424 class wxRIRefData: public wxObjectRefData
 425 {
 426 public:
 427
 428     wxRIRefData() : m_rects(0), m_numRects(0){}
 429    ~wxRIRefData();
 430
 431     wxRect *m_rects;
 432     size_t  m_numRects;
 433
 434     void CreateRects( const wxRegion& r );
 435 };
 436
 437 wxRIRefData::~wxRIRefData()
 438 {
 439     delete [] m_rects;
 440 }
 441
 442 void wxRIRefData::CreateRects( const wxRegion& region )
 443 {
 444     if (m_rects)
 445       delete [] m_rects;
 446
 447     m_rects = 0;
 448     m_numRects = 0;
 449
 450     if (region.IsEmpty()) return;
 451
 452     Region r = (Region) region.GetX11Region();
 453     if (r)
 454     {
 455 #if wxUSE_NANOX
 456         GR_RECT rect;
 457         GrGetRegionBox(r, & rect);
 458         m_numRects = 1;
 459         m_rects = new wxRect[1];
 460         m_rects[0].x = rect.x;
 461         m_rects[0].y = rect.y;
 462         m_rects[0].width = rect.width;
 463         m_rects[0].height = rect.height;
 464 #else
 465         m_numRects = r->numRects;
 466         if (m_numRects)
 467         {
 468             m_rects = new wxRect[m_numRects];
 469             for (size_t i=0; i < m_numRects; ++i)
 470             {
 471                 _XBox &xr = r->rects[i];
 472                 wxRect &wr = m_rects[i];
 473                 wr.x = xr.x1;
 474                 wr.y = xr.y1;
 475                 wr.width = xr.x2-xr.x1;
 476                 wr.height = xr.y2-xr.y1;
 477             }
 478         }
 479 #endif
 480     }
 481 }
 482
 483 wxRegionIterator::wxRegionIterator()
 484 {
 485     m_refData = new wxRIRefData();
 486     Reset();
 487 }
 488
 489 wxRegionIterator::wxRegionIterator( const wxRegion& region )
 490 {
 491     m_refData = new wxRIRefData();
 492     Reset(region);
 493 }
 494
 495 void wxRegionIterator::Reset( const wxRegion& region )
 496 {
 497     m_region = region;
 498     ((wxRIRefData*)m_refData)->CreateRects(region);
 499     Reset();
 500 }
 501
 502 bool wxRegionIterator::HaveRects() const
 503 {
 504     return m_current < ((wxRIRefData*)m_refData)->m_numRects;
 505 }
 506
 507 wxRegionIterator::operator bool () const
 508 {
 509     return HaveRects();
 510 }
 511
 512 void wxRegionIterator::operator ++ ()
 513 {
 514     if (HaveRects()) ++m_current;
 515 }
 516
 517 void wxRegionIterator::operator ++ (int)
 518 {
 519     if (HaveRects()) ++m_current;
 520 }
 521
 522 wxCoord wxRegionIterator::GetX() const
 523 {
 524     if( !HaveRects() ) return 0;
 525     return ((wxRIRefData*)m_refData)->m_rects[m_current].x;
 526 }
 527
 528 wxCoord wxRegionIterator::GetY() const
 529 {
 530     if( !HaveRects() ) return 0;
 531     return ((wxRIRefData*)m_refData)->m_rects[m_current].y;
 532 }
 533
 534 wxCoord wxRegionIterator::GetW() const
 535 {
 536     if( !HaveRects() ) return -1;
 537     return ((wxRIRefData*)m_refData)->m_rects[m_current].width;
 538 }
 539
 540 wxCoord wxRegionIterator::GetH() const
 541 {
 542     if( !HaveRects() ) return -1;
 543     return ((wxRIRefData*)m_refData)->m_rects[m_current].height;
 544 }
 545
 546 wxRect wxRegionIterator::GetRect() const
 547 {
 548     wxRect r;
 549     if( HaveRects() )
 550         r = ((wxRIRefData*)m_refData)->m_rects[m_current];
 551
 552     return r;
 553 }
 554