src/dfb/dc.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/dfb/dc.cpp
   3 // Purpose:     wxDC class
   4 // Author:      Vaclav Slavik
   5 // Created:     2006-08-07
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2006 REA Elektronik GmbH
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // ===========================================================================
  12 // declarations
  13 // ===========================================================================
  14
  15 // ---------------------------------------------------------------------------
  16 // headers
  17 // ---------------------------------------------------------------------------
  18
  19 // For compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #ifndef WX_PRECOMP
  27     #include "wx/dc.h"
  28     #include "wx/log.h"
  29 #endif
  30
  31 #include "wx/dfb/private.h"
  32
  33 // ===========================================================================
  34 // implementation
  35 // ===========================================================================
  36
  37 //-----------------------------------------------------------------------------
  38 // wxDC
  39 //-----------------------------------------------------------------------------
  40
  41 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
  42
  43 // Default constructor
  44 wxDC::wxDC()
  45 {
  46     m_ok = false;
  47 }
  48
  49 wxDC::wxDC(const wxIDirectFBSurfacePtr& surface)
  50 {
  51     Init(surface);
  52 }
  53
  54 void wxDC::Init(const wxIDirectFBSurfacePtr& surface)
  55 {
  56     m_ok = (surface != NULL);
  57     wxCHECK_RET( surface != NULL, _T("invalid surface") );
  58
  59     m_surface = surface;
  60
  61     m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
  62                     (double)wxGetDisplaySizeMM().GetWidth();
  63     m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
  64                     (double)wxGetDisplaySizeMM().GetHeight();
  65
  66     SetFont(*wxNORMAL_FONT);
  67     SetPen(*wxBLACK_PEN);
  68     SetBrush(*wxWHITE_BRUSH);
  69 }
  70
  71
  72 // ---------------------------------------------------------------------------
  73 // clipping
  74 // ---------------------------------------------------------------------------
  75
  76
  77 #define DO_SET_CLIPPING_BOX(rg)                      \
  78 {                                                    \
  79     wxRect rect = rg.GetBox();                       \
  80     m_clipX1 = (wxCoord) XDEV2LOG(rect.GetLeft());   \
  81     m_clipY1 = (wxCoord) YDEV2LOG(rect.GetTop());    \
  82     m_clipX2 = (wxCoord) XDEV2LOG(rect.GetRight());  \
  83     m_clipY2 = (wxCoord) YDEV2LOG(rect.GetBottom()); \
  84 }
  85
  86 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
  87 {
  88     wxCHECK_RET( Ok(), wxT("invalid dc") );
  89
  90     DFBRegion r;
  91     r.x1 = XLOG2DEV(cx);
  92     r.y1 = YLOG2DEV(cy);
  93     r.x2 = r.x1 + XLOG2DEVREL(cw) - 1;
  94     r.y2 = r.y1 + XLOG2DEVREL(ch) - 1;
  95
  96     if ( !m_surface->SetClip(&r) )
  97         return;
  98
  99     m_clipX1 = cx;
 100     m_clipY1 = cy;
 101     m_clipX2 = cx + cw - 1;
 102     m_clipY2 = cy + ch -1;
 103     m_clipping = true;
 104 }
 105
 106 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
 107 {
 108     // NB: this can be done because wxDFB only supports
 109     //     rectangular regions
 110     SetClippingRegion(region.AsRect());
 111 }
 112
 113 void wxDC::DestroyClippingRegion()
 114 {
 115     wxCHECK_RET( Ok(), wxT("invalid dc") );
 116
 117     m_surface->SetClip(NULL);
 118
 119     ResetClipping();
 120 }
 121
 122 // ---------------------------------------------------------------------------
 123 // query capabilities
 124 // ---------------------------------------------------------------------------
 125
 126 int wxDC::GetDepth() const
 127 {
 128     return wxDfbGetSurfaceDepth(m_surface);
 129 }
 130
 131 // ---------------------------------------------------------------------------
 132 // drawing
 133 // ---------------------------------------------------------------------------
 134
 135 void wxDC::Clear()
 136 {
 137     wxCHECK_RET( Ok(), wxT("invalid dc") );
 138
 139     if ( m_backgroundBrush.GetStyle() == wxTRANSPARENT )
 140         return;
 141
 142     wxColour clr = m_backgroundBrush.GetColour();
 143     m_surface->Clear(clr.Red(), clr.Green(), clr.Blue(), clr.Alpha());
 144 }
 145
 146 extern bool wxDoFloodFill(wxDC *dc, wxCoord x, wxCoord y,
 147                           const wxColour & col, int style);
 148
 149 bool wxDC::DoFloodFill(wxCoord x, wxCoord y,
 150                        const wxColour& col, int style)
 151 {
 152     return wxDoFloodFill(this, x, y, col, style);
 153 }
 154
 155 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
 156 {
 157     wxCHECK_MSG( col, false, _T("NULL colour parameter in wxDC::GetPixel"));
 158
 159     wxFAIL_MSG( _T("GetPixel not implemented") );
 160     return false;
 161 }
 162
 163 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
 164 {
 165     wxCHECK_RET( Ok(), wxT("invalid dc") );
 166
 167     wxFAIL_MSG( _T("CrossHair not implemented") );
 168 }
 169
 170 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 171 {
 172     wxCHECK_RET( Ok(), wxT("invalid dc") );
 173
 174     if ( m_pen.GetStyle() == wxTRANSPARENT )
 175         return;
 176
 177     m_surface->DrawLine(XLOG2DEV(x1), YLOG2DEV(y1),
 178                         XLOG2DEV(x2), YLOG2DEV(y2));
 179
 180     CalcBoundingBox(x1, y1);
 181     CalcBoundingBox(x2, y2);
 182 }
 183
 184 // Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1)
 185 // and ending at (x2, y2)
 186 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1,
 187                      wxCoord x2, wxCoord y2,
 188                      wxCoord xc, wxCoord yc)
 189 {
 190     wxCHECK_RET( Ok(), wxT("invalid dc") );
 191
 192     wxFAIL_MSG( _T("DrawArc not implemented") );
 193 }
 194
 195 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
 196 {
 197     wxCHECK_RET( Ok(), wxT("invalid dc") );
 198
 199     wxFAIL_MSG( _T("DrawPoint not implemented") );
 200 }
 201
 202 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int WXUNUSED(fillStyle))
 203 {
 204     wxCHECK_RET( Ok(), wxT("invalid dc") );
 205
 206     wxFAIL_MSG( _T("DrawPolygon not implemented") );
 207 }
 208
 209 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
 210 {
 211     wxCHECK_RET( Ok(), wxT("invalid dc") );
 212
 213     // TODO: impl. using DirectDB's DrawLines
 214     wxFAIL_MSG( _T("DrawLines not implemented") );
 215 }
 216
 217 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 218 {
 219     wxCHECK_RET( Ok(), wxT("invalid dc") );
 220
 221     wxCoord xx = XLOG2DEV(x);
 222     wxCoord yy = YLOG2DEV(y);
 223     wxCoord ww = m_signX * XLOG2DEVREL(width);
 224     wxCoord hh = m_signY * YLOG2DEVREL(height);
 225
 226     if ( ww == 0 || hh == 0 ) return;
 227
 228     if ( ww < 0 )
 229     {
 230         ww = -ww;
 231         xx = xx - ww;
 232     }
 233     if ( hh < 0 )
 234     {
 235         hh = -hh;
 236         yy = yy - hh;
 237     }
 238
 239     if ( m_brush.GetStyle() != wxTRANSPARENT )
 240     {
 241         SelectColour(m_brush.GetColour());
 242         m_surface->FillRectangle(xx, yy, ww, hh);
 243         // restore pen's colour
 244         SelectColour(m_pen.GetColour());
 245     }
 246
 247     if ( m_pen.GetStyle() != wxTRANSPARENT )
 248     {
 249         m_surface->DrawRectangle(xx, yy, ww, hh);
 250     }
 251
 252     CalcBoundingBox(x, y);
 253     CalcBoundingBox(x + width, y + height);
 254 }
 255
 256 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
 257 {
 258     wxCHECK_RET( Ok(), wxT("invalid dc") );
 259
 260     wxFAIL_MSG( _T("DrawRoundedRectangle not implemented") );
 261 }
 262
 263 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 264 {
 265     wxCHECK_RET( Ok(), wxT("invalid dc") );
 266
 267     wxFAIL_MSG( _T("DrawElipse not implemented") );
 268 }
 269
 270 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
 271 {
 272     wxCHECK_RET( Ok(), wxT("invalid dc") );
 273
 274     wxFAIL_MSG( _T("DrawElipticArc not implemented") );
 275 }
 276
 277 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
 278 {
 279     wxCHECK_RET( Ok(), wxT("invalid dc") );
 280
 281     wxCoord xx = XLOG2DEV(x);
 282     wxCoord yy = XLOG2DEV(y);
 283
 284     // update the bounding box
 285     wxCoord w, h;
 286     CalcBoundingBox(x, y);
 287     GetTextExtent(text, &w, &h);
 288     CalcBoundingBox(x + w, y + h);
 289
 290     // if background mode is solid, DrawText must paint text's background:
 291     if ( m_backgroundMode == wxSOLID )
 292     {
 293         wxCHECK_RET( m_backgroundBrush.Ok(), wxT("invalid background brush") );
 294
 295         SelectColour(m_backgroundBrush.GetColour());
 296         m_surface->FillRectangle(xx, yy, XLOG2DEVREL(w), YLOG2DEVREL(h));
 297         // restore pen's colour
 298         SelectColour(m_pen.GetColour());
 299     }
 300
 301     // finally draw the text itself:
 302     m_surface->DrawString(wxSTR_TO_DFB(text), -1, xx, yy, DSTF_LEFT | DSTF_TOP);
 303 }
 304
 305 void wxDC::DoDrawRotatedText(const wxString& text,
 306                              wxCoord x, wxCoord y,
 307                              double angle)
 308 {
 309     wxCHECK_RET( Ok(), wxT("invalid dc") );
 310
 311     wxFAIL_MSG( _T("DrawRotatedText not implemented") );
 312 }
 313
 314 // ---------------------------------------------------------------------------
 315 // set GDI objects
 316 // ---------------------------------------------------------------------------
 317
 318 void wxDC::SetPen(const wxPen& pen)
 319 {
 320     if ( !pen.Ok() ) return;
 321     m_pen = pen;
 322
 323     SelectColour(m_pen.GetColour());
 324 }
 325
 326 void wxDC::SetBrush(const wxBrush& brush)
 327 {
 328     if ( !brush.Ok() ) return;
 329     m_brush = brush;
 330 }
 331
 332 void wxDC::SelectColour(const wxColour& clr)
 333 {
 334     m_surface->SetColor(clr.Red(), clr.Green(), clr.Blue(), clr.Alpha());
 335     #warning "use SetColorIndex?"
 336 }
 337
 338 #if wxUSE_PALETTE
 339 void wxDC::SetPalette(const wxPalette& WXUNUSED(palette))
 340 {
 341     wxCHECK_RET( Ok(), wxT("invalid dc") );
 342
 343     wxFAIL_MSG( _T("SetPalette not implemented") );
 344 }
 345 #endif // wxUSE_PALETTE
 346
 347 void wxDC::SetFont(const wxFont& font)
 348 {
 349     wxCHECK_RET( Ok(), wxT("invalid dc") );
 350
 351     if ( !font.Ok() )
 352         return;
 353
 354     if ( !m_surface->SetFont(font.GetDirectFBFont()) )
 355         return;
 356
 357     m_font = font;
 358 }
 359
 360 void wxDC::SetBackground(const wxBrush& brush)
 361 {
 362     wxCHECK_RET( Ok(), wxT("invalid dc") );
 363
 364     if (!brush.Ok()) return;
 365
 366     m_backgroundBrush = brush;
 367 }
 368
 369 void wxDC::SetBackgroundMode(int mode)
 370 {
 371     m_backgroundMode = mode;
 372 }
 373
 374 void wxDC::SetLogicalFunction(int function)
 375 {
 376     wxCHECK_RET( Ok(), wxT("invalid dc") );
 377
 378     wxFAIL_MSG( _T("SetLogicalFunction not implemented") );
 379
 380     m_logicalFunction = function;
 381 }
 382
 383 bool wxDC::StartDoc(const wxString& WXUNUSED(message))
 384 {
 385     // We might be previewing, so return true to let it continue.
 386     return true;
 387 }
 388
 389 void wxDC::EndDoc()
 390 {
 391 }
 392
 393 void wxDC::StartPage()
 394 {
 395 }
 396
 397 void wxDC::EndPage()
 398 {
 399 }
 400
 401 // ---------------------------------------------------------------------------
 402 // text metrics
 403 // ---------------------------------------------------------------------------
 404
 405 wxCoord wxDC::GetCharHeight() const
 406 {
 407     wxCHECK_MSG( Ok(), -1, wxT("invalid dc") );
 408     wxCHECK_MSG( m_font.Ok(), -1, wxT("no font selected") );
 409
 410     int h = -1;
 411     m_font.GetDirectFBFont()->GetHeight(&h);
 412     return YDEV2LOGREL(h);
 413 }
 414
 415 wxCoord wxDC::GetCharWidth() const
 416 {
 417     wxCHECK_MSG( Ok(), -1, wxT("invalid dc") );
 418     wxCHECK_MSG( m_font.Ok(), -1, wxT("no font selected") );
 419
 420     int w = -1;
 421     m_font.GetDirectFBFont()->GetStringWidth("H", 1, &w);
 422     // VS: YDEV is corrent, it should *not* be XDEV, because font's are only
 423     //     scaled according to m_scaleY
 424     return YDEV2LOGREL(w);
 425 }
 426
 427 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
 428                            wxCoord *descent, wxCoord *externalLeading,
 429                            wxFont *theFont) const
 430 {
 431     wxCHECK_RET( Ok(), wxT("invalid dc") );
 432     wxCHECK_RET( m_font.Ok(), wxT("no font selected") );
 433     wxCHECK_RET( !theFont || theFont->Ok(), wxT("invalid font") );
 434
 435     wxFont oldFont;
 436     if ( theFont != NULL )
 437     {
 438         oldFont = m_font;
 439         wxConstCast(this, wxDC)->SetFont(*theFont);
 440     }
 441
 442     wxCoord xx = 0, yy = 0;
 443     DFBRectangle rect;
 444     wxIDirectFBFontPtr f = m_font.GetDirectFBFont();
 445
 446     if ( f->GetStringExtents(wxSTR_TO_DFB(string), -1, &rect, NULL) )
 447     {
 448         // VS: YDEV is corrent, it should *not* be XDEV, because font's are
 449         //     only scaled according to m_scaleY
 450         xx = YDEV2LOGREL(rect.w);
 451         yy = YDEV2LOGREL(rect.h);
 452
 453         if ( descent )
 454         {
 455             int d;
 456             if ( f->GetDescender(&d) )
 457                 *descent = YDEV2LOGREL(-d);
 458             else
 459                 *descent = 0;
 460         }
 461     }
 462
 463     if ( x ) *x = xx;
 464     if ( y ) *y = yy;
 465     if ( externalLeading ) *externalLeading = 0;
 466
 467     if ( theFont != NULL )
 468         wxConstCast(this, wxDC)->SetFont(oldFont);
 469 }
 470
 471
 472
 473 // ---------------------------------------------------------------------------
 474 // mapping modes
 475 // ---------------------------------------------------------------------------
 476
 477 void wxDC::ComputeScaleAndOrigin()
 478 {
 479     m_scaleX = m_logicalScaleX * m_userScaleX;
 480     m_scaleY = m_logicalScaleY * m_userScaleY;
 481
 482     // FIXME_DFB: scaling affects pixel size of font, pens, brushes, which
 483     //            is not currently implemented here; probably makes sense to
 484     //            switch to Cairo instead of implementing everything for DFB
 485     wxASSERT_MSG( m_scaleX == 1.0 && m_scaleY == 1.0,
 486                   _T("scaling is not implemented in wxDFB") );
 487 }
 488
 489 void wxDC::SetMapMode(int mode)
 490 {
 491     #warning "move this to common code, it's shared by almost all ports!"
 492     switch (mode)
 493     {
 494         case wxMM_TWIPS:
 495           SetLogicalScale(twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y);
 496           break;
 497         case wxMM_POINTS:
 498           SetLogicalScale(pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y);
 499           break;
 500         case wxMM_METRIC:
 501           SetLogicalScale(m_mm_to_pix_x, m_mm_to_pix_y);
 502           break;
 503         case wxMM_LOMETRIC:
 504           SetLogicalScale(m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0);
 505           break;
 506         default:
 507         case wxMM_TEXT:
 508           SetLogicalScale(1.0, 1.0);
 509           break;
 510     }
 511     m_mappingMode = mode;
 512 }
 513
 514 void wxDC::SetUserScale(double x, double y)
 515 {
 516     #warning "move this to common code?"
 517     // allow negative ? -> no
 518     m_userScaleX = x;
 519     m_userScaleY = y;
 520     ComputeScaleAndOrigin();
 521 }
 522
 523 void wxDC::SetLogicalScale(double x, double y)
 524 {
 525     #warning "move this to common code?"
 526     // allow negative ?
 527     m_logicalScaleX = x;
 528     m_logicalScaleY = y;
 529     ComputeScaleAndOrigin();
 530 }
 531
 532 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 533 {
 534     #warning "move this to common code?"
 535     m_logicalOriginX = x * m_signX;   // is this still correct ?
 536     m_logicalOriginY = y * m_signY;
 537     ComputeScaleAndOrigin();
 538 }
 539
 540 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 541 {
 542     #warning "move this to common code?"
 543     // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
 544     m_deviceOriginX = x;
 545     m_deviceOriginY = y;
 546     ComputeScaleAndOrigin();
 547 }
 548
 549 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 550 {
 551     #warning "move this to common code?"
 552     // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
 553     m_signX = (xLeftRight ?  1 : -1);
 554     m_signY = (yBottomUp  ? -1 :  1);
 555     ComputeScaleAndOrigin();
 556 }
 557
 558 // ---------------------------------------------------------------------------
 559 // coordinates transformations
 560 // ---------------------------------------------------------------------------
 561
 562 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
 563 {
 564     return ((wxDC *)this)->XDEV2LOG(x);
 565 }
 566
 567 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
 568 {
 569     return ((wxDC *)this)->YDEV2LOG(y);
 570 }
 571
 572 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
 573 {
 574     return ((wxDC *)this)->XDEV2LOGREL(x);
 575 }
 576
 577 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
 578 {
 579     return ((wxDC *)this)->YDEV2LOGREL(y);
 580 }
 581
 582 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
 583 {
 584     return ((wxDC *)this)->XLOG2DEV(x);
 585 }
 586
 587 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
 588 {
 589     return ((wxDC *)this)->YLOG2DEV(y);
 590 }
 591
 592 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
 593 {
 594     return ((wxDC *)this)->XLOG2DEVREL(x);
 595 }
 596
 597 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
 598 {
 599     return ((wxDC *)this)->YLOG2DEVREL(y);
 600 }
 601
 602
 603 void wxDC::DoGetSize(int *w, int *h) const
 604 {
 605     wxCHECK_RET( Ok(), wxT("invalid dc") );
 606
 607     m_surface->GetSize(w, h);
 608 }
 609
 610 void wxDC::DoGetSizeMM(int *width, int *height) const
 611 {
 612     #warning "move this to common code?"
 613     int w = 0;
 614     int h = 0;
 615     GetSize(&w, &h);
 616     if ( width ) *width = int(double(w) / (m_userScaleX*m_mm_to_pix_x));
 617     if ( height ) *height = int(double(h) / (m_userScaleY*m_mm_to_pix_y));
 618 }
 619
 620 wxSize wxDC::GetPPI() const
 621 {
 622     #warning "move this to common code?"
 623     return wxSize(int(double(m_mm_to_pix_x) * inches2mm),
 624                   int(double(m_mm_to_pix_y) * inches2mm));
 625 }
 626
 627
 628 // ---------------------------------------------------------------------------
 629 // Blitting
 630 // ---------------------------------------------------------------------------
 631
 632 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
 633                   wxCoord width, wxCoord height,
 634                   wxDC *source, wxCoord xsrc, wxCoord ysrc,
 635                   int rop, bool useMask,
 636                   wxCoord xsrcMask, wxCoord ysrcMask)
 637 {
 638 #warning "FIXME"
 639     return false;
 640 #if 0
 641     wxCHECK_MSG( Ok(), false, wxT("invalid dc") );
 642     wxCHECK_MSG( source, false, wxT("invalid source dc") );
 643
 644     // transform the source DC coords to the device ones
 645     xsrc = source->LogicalToDeviceX(xsrc);
 646     ysrc = source->LogicalToDeviceY(ysrc);
 647
 648     /* FIXME_MGL: use the mask origin when drawing transparently */
 649     if (xsrcMask == -1 && ysrcMask == -1)
 650     {
 651         xsrcMask = xsrc; ysrcMask = ysrc;
 652     }
 653     else
 654     {
 655         xsrcMask = source->LogicalToDeviceX(xsrcMask);
 656         ysrcMask = source->LogicalToDeviceY(ysrcMask);
 657     }
 658
 659     CalcBoundingBox(xdest, ydest);
 660     CalcBoundingBox(xdest + width, ydest + height);
 661
 662     /* scale/translate size and position */
 663     wxCoord xx = XLOG2DEV(xdest);
 664     wxCoord yy = YLOG2DEV(ydest);
 665     wxCoord ww = XLOG2DEVREL(width);
 666     wxCoord hh = YLOG2DEVREL(height);
 667
 668     if ( source->m_isMemDC )
 669     {
 670         wxMemoryDC *memDC = (wxMemoryDC*) source;
 671         DoDrawSubBitmap(memDC->GetSelectedObject(), xsrc, ysrc, ww, hh,
 672                         xdest, ydest, rop, useMask);
 673     }
 674     else
 675     {
 676         m_MGLDC->makeCurrent(); // will go away with MGL6.0
 677         m_MGLDC->bitBlt(*source->GetMGLDC(),
 678                         xsrc, ysrc, xsrc + ww, ysrc + hh,
 679                         xx, yy, LogicalFunctionToMGLRop(rop));
 680     }
 681
 682     return true;
 683 #endif
 684 }
 685
 686 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
 687 {
 688     wxCHECK_RET( Ok(), wxT("invalid dc") );
 689     wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
 690
 691     wxCoord w = bmp.GetWidth();
 692     wxCoord h = bmp.GetHeight();
 693
 694     DoDrawSubBitmap(bmp, 0, 0, w, h, x, y, m_logicalFunction, useMask);
 695 }
 696
 697 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
 698 {
 699     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 700     DoDrawBitmap((const wxBitmap&)icon, x, y, true);
 701 }
 702
 703 void wxDC::DoDrawSubBitmap(const wxBitmap &bmp,
 704                            wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 705                            wxCoord destx, wxCoord desty, int rop, bool useMask)
 706 {
 707 #if 0
 708     wxCHECK_RET( Ok(), wxT("invalid dc") );
 709     wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
 710
 711     CalcBoundingBox(x, y);
 712     CalcBoundingBox(x + w, y + h);
 713
 714     wxCoord dx = XLOG2DEV(destx);
 715     wxCoord dy = YLOG2DEV(desty);
 716     wxCoord dw = XLOG2DEVREL(w);
 717     wxCoord dh = YLOG2DEVREL(h);
 718
 719     m_MGLDC->makeCurrent(); // will go away with MGL6.0
 720
 721     bool useStretching = ((w != dw) || (h != dh));
 722     bool putSection = (w != bmp.GetWidth() || h != bmp.GetHeight());
 723     MGL_writeModeType mglRop = (MGL_writeModeType)LogicalFunctionToMGLRop(rop);
 724
 725     if ( bmp.GetDepth() == 1 )
 726     {
 727         // Mono bitmaps are handled in special way -- all 1s are drawn in
 728         // foreground colours, all 0s in background colour.
 729
 730         ((wxBitmap&)bmp).SetMonoPalette(m_textForegroundColour, m_textBackgroundColour);
 731     }
 732
 733     if ( useMask && bmp.GetMask() )
 734     {
 735         // Since MGL does not support masks directly (in MGL, mask is handled
 736         // in same way as in wxImage, i.e. there is one "key" color), we
 737         // simulate masked bitblt in 6 steps (same as in MSW):
 738         //
 739         // 1. Create a temporary bitmap and copy the destination area into it.
 740         // 2. Copy the source area into the temporary bitmap using the
 741         //    specified logical function.
 742         // 3. Set the masked area in the temporary bitmap to BLACK by ANDing
 743         //    the mask bitmap with the temp bitmap with the foreground colour
 744         //    set to WHITE and the bg colour set to BLACK.
 745         // 4. Set the unmasked area in the destination area to BLACK by
 746         //    ANDing the mask bitmap with the destination area with the
 747         //    foreground colour set to BLACK and the background colour set
 748         //    to WHITE.
 749         // 5. OR the temporary bitmap with the destination area.
 750         // 6. Delete the temporary bitmap.
 751         //
 752         // This sequence of operations ensures that the source's transparent
 753         // area need not be black, and logical functions are supported.
 754
 755         wxBitmap *mask = bmp.GetMask()->GetBitmap();
 756
 757         MGLMemoryDC *temp;
 758
 759         if ( GetDepth() <= 8 )
 760         {
 761             temp = new MGLMemoryDC(dw, dh, GetDepth(), NULL);
 762             wxDC tempdc;
 763             tempdc.SetMGLDC(temp, false);
 764             tempdc.SetPalette(m_palette);
 765         }
 766         else
 767         {
 768             pixel_format_t pf;
 769             m_MGLDC->getPixelFormat(pf);
 770             temp = new MGLMemoryDC(dw, dh, GetDepth(), &pf);
 771         }
 772
 773         wxCHECK_RET( temp->isValid(), wxT("cannot create temporary dc") );
 774
 775         temp->bitBlt(*m_MGLDC, dx, dy, dx + dw, dy + dh, 0, 0, MGL_REPLACE_MODE);
 776
 777         DoBitBlt(bmp, temp, x, y, w, h, 0, 0, dw, dh, mglRop,
 778                  useStretching, putSection);
 779
 780         mask->SetMonoPalette(wxColour(0,0,0), wxColour(255,255,255));
 781         DoBitBlt(*mask, temp, x, y, w, h, 0, 0, dw, dh, MGL_R2_MASKSRC,
 782                  useStretching, putSection);
 783         DoBitBlt(*mask, m_MGLDC, x, y, w, h, dx, dy, dw, dh, MGL_R2_MASKNOTSRC,
 784                  useStretching, putSection);
 785
 786         m_MGLDC->bitBlt(*temp, 0, 0, dw, dh, dx, dy, MGL_OR_MODE);
 787
 788         delete temp;
 789     }
 790
 791     else
 792     {
 793         DoBitBlt(bmp, m_MGLDC, x, y, w, h, dx, dy, dw, dh, mglRop,
 794                  useStretching, putSection);
 795     }
 796 #endif
 797 }