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 // these values are used to initialize newly created DC
  34 #define DEFAULT_FONT      (*wxNORMAL_FONT)
  35 #define DEFAULT_PEN       (*wxBLACK_PEN)
  36 #define DEFAULT_BRUSH     (*wxWHITE_BRUSH)
  37
  38 // ===========================================================================
  39 // implementation
  40 // ===========================================================================
  41
  42 //-----------------------------------------------------------------------------
  43 // wxDC
  44 //-----------------------------------------------------------------------------
  45
  46 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
  47
  48 // Default constructor
  49 wxDC::wxDC()
  50 {
  51     m_ok = false;
  52 }
  53
  54 wxDC::wxDC(const wxIDirectFBSurfacePtr& surface)
  55 {
  56     Init(surface);
  57 }
  58
  59 void wxDC::Init(const wxIDirectFBSurfacePtr& surface)
  60 {
  61     m_ok = (surface != NULL);
  62     wxCHECK_RET( surface != NULL, _T("invalid surface") );
  63
  64     m_surface = surface;
  65
  66     m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
  67                     (double)wxGetDisplaySizeMM().GetWidth();
  68     m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
  69                     (double)wxGetDisplaySizeMM().GetHeight();
  70
  71     SetFont(DEFAULT_FONT);
  72     SetPen(DEFAULT_PEN);
  73     SetBrush(DEFAULT_BRUSH);
  74 }
  75
  76
  77 // ---------------------------------------------------------------------------
  78 // clipping
  79 // ---------------------------------------------------------------------------
  80
  81
  82 #define DO_SET_CLIPPING_BOX(rg)                      \
  83 {                                                    \
  84     wxRect rect = rg.GetBox();                       \
  85     m_clipX1 = (wxCoord) XDEV2LOG(rect.GetLeft());   \
  86     m_clipY1 = (wxCoord) YDEV2LOG(rect.GetTop());    \
  87     m_clipX2 = (wxCoord) XDEV2LOG(rect.GetRight());  \
  88     m_clipY2 = (wxCoord) YDEV2LOG(rect.GetBottom()); \
  89 }
  90
  91 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
  92 {
  93     wxCHECK_RET( Ok(), wxT("invalid dc") );
  94
  95     DFBRegion r;
  96     r.x1 = XLOG2DEV(cx);
  97     r.y1 = YLOG2DEV(cy);
  98     r.x2 = r.x1 + XLOG2DEVREL(cw) - 1;
  99     r.y2 = r.y1 + XLOG2DEVREL(ch) - 1;
 100
 101     if ( !m_surface->SetClip(&r) )
 102         return;
 103
 104     m_clipX1 = cx;
 105     m_clipY1 = cy;
 106     m_clipX2 = cx + cw - 1;
 107     m_clipY2 = cy + ch -1;
 108     m_clipping = true;
 109 }
 110
 111 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
 112 {
 113     // NB: this can be done because wxDFB only supports
 114     //     rectangular regions
 115     SetClippingRegion(region.AsRect());
 116 }
 117
 118 void wxDC::DestroyClippingRegion()
 119 {
 120     wxCHECK_RET( Ok(), wxT("invalid dc") );
 121
 122     m_surface->SetClip(NULL);
 123
 124     ResetClipping();
 125 }
 126
 127 // ---------------------------------------------------------------------------
 128 // query capabilities
 129 // ---------------------------------------------------------------------------
 130
 131 int wxDC::GetDepth() const
 132 {
 133     return wxDfbGetSurfaceDepth(m_surface);
 134 }
 135
 136 // ---------------------------------------------------------------------------
 137 // drawing
 138 // ---------------------------------------------------------------------------
 139
 140 void wxDC::Clear()
 141 {
 142     wxCHECK_RET( Ok(), wxT("invalid dc") );
 143
 144     if ( m_backgroundBrush.GetStyle() == wxTRANSPARENT )
 145         return;
 146
 147     wxColour clr = m_backgroundBrush.GetColour();
 148     m_surface->Clear(clr.Red(), clr.Green(), clr.Blue(), clr.Alpha());
 149 }
 150
 151 extern bool wxDoFloodFill(wxDC *dc, wxCoord x, wxCoord y,
 152                           const wxColour & col, int style);
 153
 154 bool wxDC::DoFloodFill(wxCoord x, wxCoord y,
 155                        const wxColour& col, int style)
 156 {
 157     return wxDoFloodFill(this, x, y, col, style);
 158 }
 159
 160 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
 161 {
 162     wxCHECK_MSG( col, false, _T("NULL colour parameter in wxDC::GetPixel"));
 163
 164     wxFAIL_MSG( _T("GetPixel not implemented") );
 165     return false;
 166 }
 167
 168 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
 169 {
 170     wxCHECK_RET( Ok(), wxT("invalid dc") );
 171
 172     wxFAIL_MSG( _T("CrossHair not implemented") );
 173 }
 174
 175 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 176 {
 177     wxCHECK_RET( Ok(), wxT("invalid dc") );
 178
 179     if ( m_pen.GetStyle() == wxTRANSPARENT )
 180         return;
 181
 182     m_surface->DrawLine(XLOG2DEV(x1), YLOG2DEV(y1),
 183                         XLOG2DEV(x2), YLOG2DEV(y2));
 184
 185     CalcBoundingBox(x1, y1);
 186     CalcBoundingBox(x2, y2);
 187 }
 188
 189 // Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1)
 190 // and ending at (x2, y2)
 191 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1,
 192                      wxCoord x2, wxCoord y2,
 193                      wxCoord xc, wxCoord yc)
 194 {
 195     wxCHECK_RET( Ok(), wxT("invalid dc") );
 196
 197     wxFAIL_MSG( _T("DrawArc not implemented") );
 198 }
 199
 200 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
 201 {
 202     wxCHECK_RET( Ok(), wxT("invalid dc") );
 203
 204     wxFAIL_MSG( _T("DrawPoint not implemented") );
 205 }
 206
 207 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int WXUNUSED(fillStyle))
 208 {
 209     wxCHECK_RET( Ok(), wxT("invalid dc") );
 210
 211     wxFAIL_MSG( _T("DrawPolygon not implemented") );
 212 }
 213
 214 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
 215 {
 216     wxCHECK_RET( Ok(), wxT("invalid dc") );
 217
 218     // TODO: impl. using DirectDB's DrawLines
 219     wxFAIL_MSG( _T("DrawLines not implemented") );
 220 }
 221
 222 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 223 {
 224     wxCHECK_RET( Ok(), wxT("invalid dc") );
 225
 226     wxCoord xx = XLOG2DEV(x);
 227     wxCoord yy = YLOG2DEV(y);
 228     wxCoord ww = m_signX * XLOG2DEVREL(width);
 229     wxCoord hh = m_signY * YLOG2DEVREL(height);
 230
 231     if ( ww == 0 || hh == 0 ) return;
 232
 233     if ( ww < 0 )
 234     {
 235         ww = -ww;
 236         xx = xx - ww;
 237     }
 238     if ( hh < 0 )
 239     {
 240         hh = -hh;
 241         yy = yy - hh;
 242     }
 243
 244     if ( m_brush.GetStyle() != wxTRANSPARENT )
 245     {
 246         SelectColour(m_brush.GetColour());
 247         m_surface->FillRectangle(xx, yy, ww, hh);
 248         // restore pen's colour
 249         SelectColour(m_pen.GetColour());
 250     }
 251
 252     if ( m_pen.GetStyle() != wxTRANSPARENT )
 253     {
 254         m_surface->DrawRectangle(xx, yy, ww, hh);
 255     }
 256
 257     CalcBoundingBox(x, y);
 258     CalcBoundingBox(x + width, y + height);
 259 }
 260
 261 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
 262 {
 263     wxCHECK_RET( Ok(), wxT("invalid dc") );
 264
 265     wxFAIL_MSG( _T("DrawRoundedRectangle not implemented") );
 266 }
 267
 268 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 269 {
 270     wxCHECK_RET( Ok(), wxT("invalid dc") );
 271
 272     wxFAIL_MSG( _T("DrawElipse not implemented") );
 273 }
 274
 275 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
 276 {
 277     wxCHECK_RET( Ok(), wxT("invalid dc") );
 278
 279     wxFAIL_MSG( _T("DrawElipticArc not implemented") );
 280 }
 281
 282 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
 283 {
 284     wxCHECK_RET( Ok(), wxT("invalid dc") );
 285
 286     wxCoord xx = XLOG2DEV(x);
 287     wxCoord yy = XLOG2DEV(y);
 288
 289     // update the bounding box
 290     wxCoord w, h;
 291     CalcBoundingBox(x, y);
 292     GetTextExtent(text, &w, &h);
 293     CalcBoundingBox(x + w, y + h);
 294
 295     // if background mode is solid, DrawText must paint text's background:
 296     if ( m_backgroundMode == wxSOLID )
 297     {
 298         wxCHECK_RET( m_backgroundBrush.Ok(), wxT("invalid background brush") );
 299
 300         SelectColour(m_backgroundBrush.GetColour());
 301         m_surface->FillRectangle(xx, yy, XLOG2DEVREL(w), YLOG2DEVREL(h));
 302         // restore pen's colour
 303         SelectColour(m_pen.GetColour());
 304     }
 305
 306     // finally draw the text itself:
 307     m_surface->DrawString(wxSTR_TO_DFB(text), -1, xx, yy, DSTF_LEFT | DSTF_TOP);
 308 }
 309
 310 void wxDC::DoDrawRotatedText(const wxString& text,
 311                              wxCoord x, wxCoord y,
 312                              double angle)
 313 {
 314     wxCHECK_RET( Ok(), wxT("invalid dc") );
 315
 316     wxFAIL_MSG( _T("DrawRotatedText not implemented") );
 317 }
 318
 319 // ---------------------------------------------------------------------------
 320 // set GDI objects
 321 // ---------------------------------------------------------------------------
 322
 323 void wxDC::SetPen(const wxPen& pen)
 324 {
 325     m_pen = pen.Ok() ? pen : DEFAULT_PEN;
 326
 327     SelectColour(m_pen.GetColour());
 328 }
 329
 330 void wxDC::SetBrush(const wxBrush& brush)
 331 {
 332     m_brush = brush.Ok() ? brush : DEFAULT_BRUSH;
 333 }
 334
 335 void wxDC::SelectColour(const wxColour& clr)
 336 {
 337     m_surface->SetColor(clr.Red(), clr.Green(), clr.Blue(), clr.Alpha());
 338     #warning "use SetColorIndex?"
 339 }
 340
 341 #if wxUSE_PALETTE
 342 void wxDC::SetPalette(const wxPalette& WXUNUSED(palette))
 343 {
 344     wxCHECK_RET( Ok(), wxT("invalid dc") );
 345
 346     wxFAIL_MSG( _T("SetPalette not implemented") );
 347 }
 348 #endif // wxUSE_PALETTE
 349
 350 void wxDC::SetFont(const wxFont& font)
 351 {
 352     wxCHECK_RET( Ok(), wxT("invalid dc") );
 353
 354     wxFont f(font.Ok() ? font : DEFAULT_FONT);
 355
 356     if ( !m_surface->SetFont(f.GetDirectFBFont()) )
 357         return;
 358
 359     m_font = f;
 360 }
 361
 362 void wxDC::SetBackground(const wxBrush& brush)
 363 {
 364     wxCHECK_RET( Ok(), wxT("invalid dc") );
 365
 366     if (!brush.Ok()) return;
 367
 368     m_backgroundBrush = brush;
 369 }
 370
 371 void wxDC::SetBackgroundMode(int mode)
 372 {
 373     m_backgroundMode = mode;
 374 }
 375
 376 void wxDC::SetLogicalFunction(int function)
 377 {
 378     wxCHECK_RET( Ok(), wxT("invalid dc") );
 379
 380     wxFAIL_MSG( _T("SetLogicalFunction not implemented") );
 381
 382     m_logicalFunction = function;
 383 }
 384
 385 bool wxDC::StartDoc(const wxString& WXUNUSED(message))
 386 {
 387     // We might be previewing, so return true to let it continue.
 388     return true;
 389 }
 390
 391 void wxDC::EndDoc()
 392 {
 393 }
 394
 395 void wxDC::StartPage()
 396 {
 397 }
 398
 399 void wxDC::EndPage()
 400 {
 401 }
 402
 403 // ---------------------------------------------------------------------------
 404 // text metrics
 405 // ---------------------------------------------------------------------------
 406
 407 wxCoord wxDC::GetCharHeight() const
 408 {
 409     wxCHECK_MSG( Ok(), -1, wxT("invalid dc") );
 410     wxCHECK_MSG( m_font.Ok(), -1, wxT("no font selected") );
 411
 412     int h = -1;
 413     m_font.GetDirectFBFont()->GetHeight(&h);
 414     return YDEV2LOGREL(h);
 415 }
 416
 417 wxCoord wxDC::GetCharWidth() const
 418 {
 419     wxCHECK_MSG( Ok(), -1, wxT("invalid dc") );
 420     wxCHECK_MSG( m_font.Ok(), -1, wxT("no font selected") );
 421
 422     int w = -1;
 423     m_font.GetDirectFBFont()->GetStringWidth("H", 1, &w);
 424     // VS: YDEV is corrent, it should *not* be XDEV, because font's are only
 425     //     scaled according to m_scaleY
 426     return YDEV2LOGREL(w);
 427 }
 428
 429 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
 430                            wxCoord *descent, wxCoord *externalLeading,
 431                            wxFont *theFont) const
 432 {
 433     wxCHECK_RET( Ok(), wxT("invalid dc") );
 434     wxCHECK_RET( m_font.Ok(), wxT("no font selected") );
 435     wxCHECK_RET( !theFont || theFont->Ok(), wxT("invalid font") );
 436
 437     wxFont oldFont;
 438     if ( theFont != NULL )
 439     {
 440         oldFont = m_font;
 441         wxConstCast(this, wxDC)->SetFont(*theFont);
 442     }
 443
 444     wxCoord xx = 0, yy = 0;
 445     DFBRectangle rect;
 446     wxIDirectFBFontPtr f = m_font.GetDirectFBFont();
 447
 448     if ( f->GetStringExtents(wxSTR_TO_DFB(string), -1, &rect, NULL) )
 449     {
 450         // VS: YDEV is corrent, it should *not* be XDEV, because font's are
 451         //     only scaled according to m_scaleY
 452         xx = YDEV2LOGREL(rect.w);
 453         yy = YDEV2LOGREL(rect.h);
 454
 455         if ( descent )
 456         {
 457             int d;
 458             if ( f->GetDescender(&d) )
 459                 *descent = YDEV2LOGREL(-d);
 460             else
 461                 *descent = 0;
 462         }
 463     }
 464
 465     if ( x ) *x = xx;
 466     if ( y ) *y = yy;
 467     if ( externalLeading ) *externalLeading = 0;
 468
 469     if ( theFont != NULL )
 470         wxConstCast(this, wxDC)->SetFont(oldFont);
 471 }
 472
 473
 474
 475 // ---------------------------------------------------------------------------
 476 // mapping modes
 477 // ---------------------------------------------------------------------------
 478
 479 void wxDC::ComputeScaleAndOrigin()
 480 {
 481     m_scaleX = m_logicalScaleX * m_userScaleX;
 482     m_scaleY = m_logicalScaleY * m_userScaleY;
 483
 484     // FIXME_DFB: scaling affects pixel size of font, pens, brushes, which
 485     //            is not currently implemented here; probably makes sense to
 486     //            switch to Cairo instead of implementing everything for DFB
 487     wxASSERT_MSG( m_scaleX == 1.0 && m_scaleY == 1.0,
 488                   _T("scaling is not implemented in wxDFB") );
 489 }
 490
 491 void wxDC::SetMapMode(int mode)
 492 {
 493     #warning "move this to common code, it's shared by almost all ports!"
 494     switch (mode)
 495     {
 496         case wxMM_TWIPS:
 497           SetLogicalScale(twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y);
 498           break;
 499         case wxMM_POINTS:
 500           SetLogicalScale(pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y);
 501           break;
 502         case wxMM_METRIC:
 503           SetLogicalScale(m_mm_to_pix_x, m_mm_to_pix_y);
 504           break;
 505         case wxMM_LOMETRIC:
 506           SetLogicalScale(m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0);
 507           break;
 508         default:
 509         case wxMM_TEXT:
 510           SetLogicalScale(1.0, 1.0);
 511           break;
 512     }
 513     m_mappingMode = mode;
 514 }
 515
 516 void wxDC::SetUserScale(double x, double y)
 517 {
 518     #warning "move this to common code?"
 519     // allow negative ? -> no
 520     m_userScaleX = x;
 521     m_userScaleY = y;
 522     ComputeScaleAndOrigin();
 523 }
 524
 525 void wxDC::SetLogicalScale(double x, double y)
 526 {
 527     #warning "move this to common code?"
 528     // allow negative ?
 529     m_logicalScaleX = x;
 530     m_logicalScaleY = y;
 531     ComputeScaleAndOrigin();
 532 }
 533
 534 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 535 {
 536     #warning "move this to common code?"
 537     m_logicalOriginX = x * m_signX;   // is this still correct ?
 538     m_logicalOriginY = y * m_signY;
 539     ComputeScaleAndOrigin();
 540 }
 541
 542 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 543 {
 544     #warning "move this to common code?"
 545     // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
 546     m_deviceOriginX = x;
 547     m_deviceOriginY = y;
 548     ComputeScaleAndOrigin();
 549 }
 550
 551 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 552 {
 553     #warning "move this to common code?"
 554     // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
 555     m_signX = (xLeftRight ?  1 : -1);
 556     m_signY = (yBottomUp  ? -1 :  1);
 557     ComputeScaleAndOrigin();
 558 }
 559
 560 // ---------------------------------------------------------------------------
 561 // coordinates transformations
 562 // ---------------------------------------------------------------------------
 563
 564 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
 565 {
 566     return ((wxDC *)this)->XDEV2LOG(x);
 567 }
 568
 569 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
 570 {
 571     return ((wxDC *)this)->YDEV2LOG(y);
 572 }
 573
 574 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
 575 {
 576     return ((wxDC *)this)->XDEV2LOGREL(x);
 577 }
 578
 579 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
 580 {
 581     return ((wxDC *)this)->YDEV2LOGREL(y);
 582 }
 583
 584 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
 585 {
 586     return ((wxDC *)this)->XLOG2DEV(x);
 587 }
 588
 589 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
 590 {
 591     return ((wxDC *)this)->YLOG2DEV(y);
 592 }
 593
 594 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
 595 {
 596     return ((wxDC *)this)->XLOG2DEVREL(x);
 597 }
 598
 599 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
 600 {
 601     return ((wxDC *)this)->YLOG2DEVREL(y);
 602 }
 603
 604
 605 void wxDC::DoGetSize(int *w, int *h) const
 606 {
 607     wxCHECK_RET( Ok(), wxT("invalid dc") );
 608
 609     m_surface->GetSize(w, h);
 610 }
 611
 612 void wxDC::DoGetSizeMM(int *width, int *height) const
 613 {
 614     #warning "move this to common code?"
 615     int w = 0;
 616     int h = 0;
 617     GetSize(&w, &h);
 618     if ( width ) *width = int(double(w) / (m_userScaleX*m_mm_to_pix_x));
 619     if ( height ) *height = int(double(h) / (m_userScaleY*m_mm_to_pix_y));
 620 }
 621
 622 wxSize wxDC::GetPPI() const
 623 {
 624     #warning "move this to common code?"
 625     return wxSize(int(double(m_mm_to_pix_x) * inches2mm),
 626                   int(double(m_mm_to_pix_y) * inches2mm));
 627 }
 628
 629
 630 // ---------------------------------------------------------------------------
 631 // Blitting
 632 // ---------------------------------------------------------------------------
 633
 634 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
 635                   wxCoord width, wxCoord height,
 636                   wxDC *source, wxCoord xsrc, wxCoord ysrc,
 637                   int rop, bool useMask,
 638                   wxCoord xsrcMask, wxCoord ysrcMask)
 639 {
 640 #warning "FIXME"
 641     return false;
 642 #if 0
 643     wxCHECK_MSG( Ok(), false, wxT("invalid dc") );
 644     wxCHECK_MSG( source, false, wxT("invalid source dc") );
 645
 646     // transform the source DC coords to the device ones
 647     xsrc = source->LogicalToDeviceX(xsrc);
 648     ysrc = source->LogicalToDeviceY(ysrc);
 649
 650     /* FIXME_MGL: use the mask origin when drawing transparently */
 651     if (xsrcMask == -1 && ysrcMask == -1)
 652     {
 653         xsrcMask = xsrc; ysrcMask = ysrc;
 654     }
 655     else
 656     {
 657         xsrcMask = source->LogicalToDeviceX(xsrcMask);
 658         ysrcMask = source->LogicalToDeviceY(ysrcMask);
 659     }
 660
 661     CalcBoundingBox(xdest, ydest);
 662     CalcBoundingBox(xdest + width, ydest + height);
 663
 664     /* scale/translate size and position */
 665     wxCoord xx = XLOG2DEV(xdest);
 666     wxCoord yy = YLOG2DEV(ydest);
 667     wxCoord ww = XLOG2DEVREL(width);
 668     wxCoord hh = YLOG2DEVREL(height);
 669
 670     if ( source->m_isMemDC )
 671     {
 672         wxMemoryDC *memDC = (wxMemoryDC*) source;
 673         DoDrawSubBitmap(memDC->GetSelectedObject(), xsrc, ysrc, ww, hh,
 674                         xdest, ydest, rop, useMask);
 675     }
 676     else
 677     {
 678         m_MGLDC->makeCurrent(); // will go away with MGL6.0
 679         m_MGLDC->bitBlt(*source->GetMGLDC(),
 680                         xsrc, ysrc, xsrc + ww, ysrc + hh,
 681                         xx, yy, LogicalFunctionToMGLRop(rop));
 682     }
 683
 684     return true;
 685 #endif
 686 }
 687
 688 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
 689 {
 690     wxCHECK_RET( Ok(), wxT("invalid dc") );
 691     wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
 692
 693     wxCoord w = bmp.GetWidth();
 694     wxCoord h = bmp.GetHeight();
 695
 696     DoDrawSubBitmap(bmp, 0, 0, w, h, x, y, m_logicalFunction, useMask);
 697 }
 698
 699 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
 700 {
 701     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 702     DoDrawBitmap((const wxBitmap&)icon, x, y, true);
 703 }
 704
 705 void wxDC::DoDrawSubBitmap(const wxBitmap &bmp,
 706                            wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 707                            wxCoord destx, wxCoord desty, int rop, bool useMask)
 708 {
 709 #if 0
 710     wxCHECK_RET( Ok(), wxT("invalid dc") );
 711     wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
 712
 713     CalcBoundingBox(x, y);
 714     CalcBoundingBox(x + w, y + h);
 715
 716     wxCoord dx = XLOG2DEV(destx);
 717     wxCoord dy = YLOG2DEV(desty);
 718     wxCoord dw = XLOG2DEVREL(w);
 719     wxCoord dh = YLOG2DEVREL(h);
 720
 721     m_MGLDC->makeCurrent(); // will go away with MGL6.0
 722
 723     bool useStretching = ((w != dw) || (h != dh));
 724     bool putSection = (w != bmp.GetWidth() || h != bmp.GetHeight());
 725     MGL_writeModeType mglRop = (MGL_writeModeType)LogicalFunctionToMGLRop(rop);
 726
 727     if ( bmp.GetDepth() == 1 )
 728     {
 729         // Mono bitmaps are handled in special way -- all 1s are drawn in
 730         // foreground colours, all 0s in background colour.
 731
 732         ((wxBitmap&)bmp).SetMonoPalette(m_textForegroundColour, m_textBackgroundColour);
 733     }
 734
 735     if ( useMask && bmp.GetMask() )
 736     {
 737         // Since MGL does not support masks directly (in MGL, mask is handled
 738         // in same way as in wxImage, i.e. there is one "key" color), we
 739         // simulate masked bitblt in 6 steps (same as in MSW):
 740         //
 741         // 1. Create a temporary bitmap and copy the destination area into it.
 742         // 2. Copy the source area into the temporary bitmap using the
 743         //    specified logical function.
 744         // 3. Set the masked area in the temporary bitmap to BLACK by ANDing
 745         //    the mask bitmap with the temp bitmap with the foreground colour
 746         //    set to WHITE and the bg colour set to BLACK.
 747         // 4. Set the unmasked area in the destination area to BLACK by
 748         //    ANDing the mask bitmap with the destination area with the
 749         //    foreground colour set to BLACK and the background colour set
 750         //    to WHITE.
 751         // 5. OR the temporary bitmap with the destination area.
 752         // 6. Delete the temporary bitmap.
 753         //
 754         // This sequence of operations ensures that the source's transparent
 755         // area need not be black, and logical functions are supported.
 756
 757         wxBitmap *mask = bmp.GetMask()->GetBitmap();
 758
 759         MGLMemoryDC *temp;
 760
 761         if ( GetDepth() <= 8 )
 762         {
 763             temp = new MGLMemoryDC(dw, dh, GetDepth(), NULL);
 764             wxDC tempdc;
 765             tempdc.SetMGLDC(temp, false);
 766             tempdc.SetPalette(m_palette);
 767         }
 768         else
 769         {
 770             pixel_format_t pf;
 771             m_MGLDC->getPixelFormat(pf);
 772             temp = new MGLMemoryDC(dw, dh, GetDepth(), &pf);
 773         }
 774
 775         wxCHECK_RET( temp->isValid(), wxT("cannot create temporary dc") );
 776
 777         temp->bitBlt(*m_MGLDC, dx, dy, dx + dw, dy + dh, 0, 0, MGL_REPLACE_MODE);
 778
 779         DoBitBlt(bmp, temp, x, y, w, h, 0, 0, dw, dh, mglRop,
 780                  useStretching, putSection);
 781
 782         mask->SetMonoPalette(wxColour(0,0,0), wxColour(255,255,255));
 783         DoBitBlt(*mask, temp, x, y, w, h, 0, 0, dw, dh, MGL_R2_MASKSRC,
 784                  useStretching, putSection);
 785         DoBitBlt(*mask, m_MGLDC, x, y, w, h, dx, dy, dw, dh, MGL_R2_MASKNOTSRC,
 786                  useStretching, putSection);
 787
 788         m_MGLDC->bitBlt(*temp, 0, 0, dw, dh, dx, dy, MGL_OR_MODE);
 789
 790         delete temp;
 791     }
 792
 793     else
 794     {
 795         DoBitBlt(bmp, m_MGLDC, x, y, w, h, dx, dy, dw, dh, mglRop,
 796                  useStretching, putSection);
 797     }
 798 #endif
 799 }