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 void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
  82 {
  83     wxCHECK_RET( Ok(), wxT("invalid dc") );
  84
  85     wxSize size(GetSize());
  86
  87     wxASSERT_MSG( !m_clipping,
  88                   _T("narrowing clipping region not implemented yet") );
  89
  90     // NB: We intersect the clipping rectangle with surface's area here because
  91     //     DirectFB will return an error if you try to set clipping rectangle
  92     //     that is partially outside of the surface.
  93     DFBRegion r;
  94     r.x1 = wxMax(0, XLOG2DEV(cx));
  95     r.y1 = wxMax(0, YLOG2DEV(cy));
  96     r.x2 = wxMin(r.x1 + XLOG2DEVREL(cw), size.x) - 1;
  97     r.y2 = wxMin(r.y1 + YLOG2DEVREL(ch), size.y) - 1;
  98
  99     if ( !m_surface->SetClip(&r) )
 100         return;
 101
 102     m_clipX1 = cx;
 103     m_clipY1 = cy;
 104     m_clipX2 = cx + cw - 1;
 105     m_clipY2 = cy + ch -1;
 106     m_clipping = true;
 107 }
 108
 109 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
 110 {
 111     // NB: this can be done because wxDFB only supports rectangular regions
 112     SetClippingRegion(region.AsRect());
 113 }
 114
 115 void wxDC::DestroyClippingRegion()
 116 {
 117     wxCHECK_RET( Ok(), wxT("invalid dc") );
 118
 119     m_surface->SetClip(NULL);
 120
 121     ResetClipping();
 122 }
 123
 124 // ---------------------------------------------------------------------------
 125 // query capabilities
 126 // ---------------------------------------------------------------------------
 127
 128 int wxDC::GetDepth() const
 129 {
 130     return m_surface->GetDepth();
 131 }
 132
 133 // ---------------------------------------------------------------------------
 134 // drawing
 135 // ---------------------------------------------------------------------------
 136
 137 void wxDC::Clear()
 138 {
 139     wxCHECK_RET( Ok(), wxT("invalid dc") );
 140
 141     if ( m_backgroundBrush.GetStyle() == wxTRANSPARENT )
 142         return;
 143
 144     wxColour clr = m_backgroundBrush.GetColour();
 145     m_surface->Clear(clr.Red(), clr.Green(), clr.Blue(), clr.Alpha());
 146
 147     wxSize size(GetSize());
 148     CalcBoundingBox(XDEV2LOG(0), YDEV2LOG(0));
 149     CalcBoundingBox(XDEV2LOG(size.x), YDEV2LOG(size.y));
 150 }
 151
 152 extern bool wxDoFloodFill(wxDC *dc, wxCoord x, wxCoord y,
 153                           const wxColour & col, int style);
 154
 155 bool wxDC::DoFloodFill(wxCoord x, wxCoord y,
 156                        const wxColour& col, int style)
 157 {
 158     return wxDoFloodFill(this, x, y, col, style);
 159 }
 160
 161 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
 162 {
 163     wxCHECK_MSG( col, false, _T("NULL colour parameter in wxDC::GetPixel"));
 164
 165     wxFAIL_MSG( _T("GetPixel not implemented") );
 166     return false;
 167 }
 168
 169 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
 170 {
 171     wxCHECK_RET( Ok(), wxT("invalid dc") );
 172
 173     wxFAIL_MSG( _T("CrossHair not implemented") );
 174 }
 175
 176 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 177 {
 178     wxCHECK_RET( Ok(), wxT("invalid dc") );
 179
 180     if ( m_pen.GetStyle() == wxTRANSPARENT )
 181         return;
 182
 183     m_surface->DrawLine(XLOG2DEV(x1), YLOG2DEV(y1),
 184                         XLOG2DEV(x2), YLOG2DEV(y2));
 185
 186     CalcBoundingBox(x1, y1);
 187     CalcBoundingBox(x2, y2);
 188 }
 189
 190 // Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1)
 191 // and ending at (x2, y2)
 192 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1,
 193                      wxCoord x2, wxCoord y2,
 194                      wxCoord xc, wxCoord yc)
 195 {
 196     wxCHECK_RET( Ok(), wxT("invalid dc") );
 197
 198     wxFAIL_MSG( _T("DrawArc not implemented") );
 199 }
 200
 201 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
 202 {
 203     wxCHECK_RET( Ok(), wxT("invalid dc") );
 204
 205     // NB: DirectFB API doesn't provide a function for drawing points, so
 206     //     implement it as 1px long line. This is inefficient, but then, so is
 207     //     using DrawPoint() for drawing more than a few points.
 208     DoDrawLine(x, y, x, y);
 209
 210     // FIXME_DFB: implement special cases for common formats (RGB24,RGBA/RGB32)
 211 }
 212
 213 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int WXUNUSED(fillStyle))
 214 {
 215     wxCHECK_RET( Ok(), wxT("invalid dc") );
 216
 217     wxFAIL_MSG( _T("DrawPolygon not implemented") );
 218 }
 219
 220 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
 221 {
 222     wxCHECK_RET( Ok(), wxT("invalid dc") );
 223
 224     // TODO: impl. using DirectDB's DrawLines
 225     wxFAIL_MSG( _T("DrawLines not implemented") );
 226 }
 227
 228 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 229 {
 230     wxCHECK_RET( Ok(), wxT("invalid dc") );
 231
 232     wxCoord xx = XLOG2DEV(x);
 233     wxCoord yy = YLOG2DEV(y);
 234     wxCoord ww = m_signX * XLOG2DEVREL(width);
 235     wxCoord hh = m_signY * YLOG2DEVREL(height);
 236
 237     if ( ww == 0 || hh == 0 ) return;
 238
 239     if ( ww < 0 )
 240     {
 241         ww = -ww;
 242         xx = xx - ww;
 243     }
 244     if ( hh < 0 )
 245     {
 246         hh = -hh;
 247         yy = yy - hh;
 248     }
 249
 250     if ( m_brush.GetStyle() != wxTRANSPARENT )
 251     {
 252         SelectColour(m_brush.GetColour());
 253         m_surface->FillRectangle(xx, yy, ww, hh);
 254         // restore pen's colour, because other drawing functions expect the
 255         // colour to be set to the pen:
 256         SelectColour(m_pen.GetColour());
 257     }
 258
 259     if ( m_pen.GetStyle() != wxTRANSPARENT )
 260     {
 261         m_surface->DrawRectangle(xx, yy, ww, hh);
 262     }
 263
 264     CalcBoundingBox(x, y);
 265     CalcBoundingBox(x + width, y + height);
 266 }
 267
 268 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
 269 {
 270     wxCHECK_RET( Ok(), wxT("invalid dc") );
 271
 272     wxFAIL_MSG( _T("DrawRoundedRectangle not implemented") );
 273 }
 274
 275 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 276 {
 277     wxCHECK_RET( Ok(), wxT("invalid dc") );
 278
 279     wxFAIL_MSG( _T("DrawElipse not implemented") );
 280 }
 281
 282 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
 283 {
 284     wxCHECK_RET( Ok(), wxT("invalid dc") );
 285
 286     wxFAIL_MSG( _T("DrawElipticArc not implemented") );
 287 }
 288
 289 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
 290 {
 291     wxCHECK_RET( Ok(), wxT("invalid dc") );
 292
 293     wxCoord xx = XLOG2DEV(x);
 294     wxCoord yy = YLOG2DEV(y);
 295
 296     // update the bounding box
 297     wxCoord w, h;
 298     CalcBoundingBox(x, y);
 299     GetTextExtent(text, &w, &h);
 300     CalcBoundingBox(x + w, y + h);
 301
 302     // if background mode is solid, DrawText must paint text's background:
 303     if ( m_backgroundMode == wxSOLID )
 304     {
 305         wxCHECK_RET( m_textBackgroundColour.Ok(),
 306                      wxT("invalid background color") );
 307
 308         SelectColour(m_textBackgroundColour);
 309         m_surface->FillRectangle(xx, yy, XLOG2DEVREL(w), YLOG2DEVREL(h));
 310     }
 311
 312     // finally draw the text itself:
 313     wxCHECK_RET( m_textForegroundColour.Ok(),
 314                  wxT("invalid foreground color") );
 315     SelectColour(m_textForegroundColour);
 316     m_surface->DrawString(wxSTR_TO_DFB(text), -1, xx, yy, DSTF_LEFT | DSTF_TOP);
 317
 318     // restore pen's colour, because other drawing functions expect the colour
 319     // to be set to the pen:
 320     SelectColour(m_pen.GetColour());
 321 }
 322
 323 void wxDC::DoDrawRotatedText(const wxString& text,
 324                              wxCoord x, wxCoord y,
 325                              double angle)
 326 {
 327     wxCHECK_RET( Ok(), wxT("invalid dc") );
 328
 329     wxFAIL_MSG( _T("DrawRotatedText not implemented") );
 330 }
 331
 332 // ---------------------------------------------------------------------------
 333 // set GDI objects
 334 // ---------------------------------------------------------------------------
 335
 336 void wxDC::SetPen(const wxPen& pen)
 337 {
 338     m_pen = pen.Ok() ? pen : DEFAULT_PEN;
 339
 340     SelectColour(m_pen.GetColour());
 341 }
 342
 343 void wxDC::SetBrush(const wxBrush& brush)
 344 {
 345     m_brush = brush.Ok() ? brush : DEFAULT_BRUSH;
 346 }
 347
 348 void wxDC::SelectColour(const wxColour& clr)
 349 {
 350     m_surface->SetColor(clr.Red(), clr.Green(), clr.Blue(), clr.Alpha());
 351     #warning "use SetColorIndex?"
 352 }
 353
 354 #if wxUSE_PALETTE
 355 void wxDC::SetPalette(const wxPalette& WXUNUSED(palette))
 356 {
 357     wxCHECK_RET( Ok(), wxT("invalid dc") );
 358
 359     wxFAIL_MSG( _T("SetPalette not implemented") );
 360 }
 361 #endif // wxUSE_PALETTE
 362
 363 void wxDC::SetFont(const wxFont& font)
 364 {
 365     wxCHECK_RET( Ok(), wxT("invalid dc") );
 366
 367     wxFont f(font.Ok() ? font : DEFAULT_FONT);
 368
 369     if ( !m_surface->SetFont(f.GetDirectFBFont()) )
 370         return;
 371
 372     m_font = f;
 373 }
 374
 375 void wxDC::SetBackground(const wxBrush& brush)
 376 {
 377     wxCHECK_RET( Ok(), wxT("invalid dc") );
 378
 379     if (!brush.Ok()) return;
 380
 381     m_backgroundBrush = brush;
 382 }
 383
 384 void wxDC::SetBackgroundMode(int mode)
 385 {
 386     m_backgroundMode = mode;
 387 }
 388
 389 void wxDC::SetLogicalFunction(int function)
 390 {
 391     wxCHECK_RET( Ok(), wxT("invalid dc") );
 392
 393     // NB: we could also support XOR, but for blitting only (via DSBLIT_XOR);
 394     //     and possibly others via SetSrc/DstBlendFunction()
 395     wxASSERT_MSG( function == wxCOPY,
 396                   _T("only wxCOPY logical function supported") );
 397
 398     m_logicalFunction = function;
 399 }
 400
 401 bool wxDC::StartDoc(const wxString& WXUNUSED(message))
 402 {
 403     // We might be previewing, so return true to let it continue.
 404     return true;
 405 }
 406
 407 void wxDC::EndDoc()
 408 {
 409 }
 410
 411 void wxDC::StartPage()
 412 {
 413 }
 414
 415 void wxDC::EndPage()
 416 {
 417 }
 418
 419 // ---------------------------------------------------------------------------
 420 // text metrics
 421 // ---------------------------------------------------------------------------
 422
 423 wxCoord wxDC::GetCharHeight() const
 424 {
 425     wxCHECK_MSG( Ok(), -1, wxT("invalid dc") );
 426     wxCHECK_MSG( m_font.Ok(), -1, wxT("no font selected") );
 427
 428     int h = -1;
 429     m_font.GetDirectFBFont()->GetHeight(&h);
 430     return YDEV2LOGREL(h);
 431 }
 432
 433 wxCoord wxDC::GetCharWidth() const
 434 {
 435     wxCHECK_MSG( Ok(), -1, wxT("invalid dc") );
 436     wxCHECK_MSG( m_font.Ok(), -1, wxT("no font selected") );
 437
 438     int w = -1;
 439     m_font.GetDirectFBFont()->GetStringWidth("H", 1, &w);
 440     // VS: YDEV is corrent, it should *not* be XDEV, because font's are only
 441     //     scaled according to m_scaleY
 442     return YDEV2LOGREL(w);
 443 }
 444
 445 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
 446                            wxCoord *descent, wxCoord *externalLeading,
 447                            wxFont *theFont) const
 448 {
 449     wxCHECK_RET( Ok(), wxT("invalid dc") );
 450     wxCHECK_RET( m_font.Ok(), wxT("no font selected") );
 451     wxCHECK_RET( !theFont || theFont->Ok(), wxT("invalid font") );
 452
 453     wxFont oldFont;
 454     if ( theFont != NULL )
 455     {
 456         oldFont = m_font;
 457         wxConstCast(this, wxDC)->SetFont(*theFont);
 458     }
 459
 460     wxCoord xx = 0, yy = 0;
 461     DFBRectangle rect;
 462     wxIDirectFBFontPtr f = m_font.GetDirectFBFont();
 463
 464     if ( f->GetStringExtents(wxSTR_TO_DFB(string), -1, &rect, NULL) )
 465     {
 466         // VS: YDEV is corrent, it should *not* be XDEV, because font's are
 467         //     only scaled according to m_scaleY
 468         xx = YDEV2LOGREL(rect.w);
 469         yy = YDEV2LOGREL(rect.h);
 470
 471         if ( descent )
 472         {
 473             int d;
 474             if ( f->GetDescender(&d) )
 475                 *descent = YDEV2LOGREL(-d);
 476             else
 477                 *descent = 0;
 478         }
 479     }
 480
 481     if ( x ) *x = xx;
 482     if ( y ) *y = yy;
 483     if ( externalLeading ) *externalLeading = 0;
 484
 485     if ( theFont != NULL )
 486         wxConstCast(this, wxDC)->SetFont(oldFont);
 487 }
 488
 489
 490
 491 // ---------------------------------------------------------------------------
 492 // mapping modes
 493 // ---------------------------------------------------------------------------
 494
 495 void wxDC::ComputeScaleAndOrigin()
 496 {
 497     m_scaleX = m_logicalScaleX * m_userScaleX;
 498     m_scaleY = m_logicalScaleY * m_userScaleY;
 499
 500     // FIXME_DFB: scaling affects pixel size of font, pens, brushes, which
 501     //            is not currently implemented here; probably makes sense to
 502     //            switch to Cairo instead of implementing everything for DFB
 503     wxASSERT_MSG( m_scaleX == 1.0 && m_scaleY == 1.0,
 504                   _T("scaling is not implemented in wxDFB") );
 505 }
 506
 507 void wxDC::SetMapMode(int mode)
 508 {
 509     #warning "move this to common code, it's shared by almost all ports!"
 510     switch (mode)
 511     {
 512         case wxMM_TWIPS:
 513           SetLogicalScale(twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y);
 514           break;
 515         case wxMM_POINTS:
 516           SetLogicalScale(pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y);
 517           break;
 518         case wxMM_METRIC:
 519           SetLogicalScale(m_mm_to_pix_x, m_mm_to_pix_y);
 520           break;
 521         case wxMM_LOMETRIC:
 522           SetLogicalScale(m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0);
 523           break;
 524         default:
 525         case wxMM_TEXT:
 526           SetLogicalScale(1.0, 1.0);
 527           break;
 528     }
 529     m_mappingMode = mode;
 530 }
 531
 532 void wxDC::SetUserScale(double x, double y)
 533 {
 534     #warning "move this to common code?"
 535     // allow negative ? -> no
 536     m_userScaleX = x;
 537     m_userScaleY = y;
 538     ComputeScaleAndOrigin();
 539 }
 540
 541 void wxDC::SetLogicalScale(double x, double y)
 542 {
 543     #warning "move this to common code?"
 544     // allow negative ?
 545     m_logicalScaleX = x;
 546     m_logicalScaleY = y;
 547     ComputeScaleAndOrigin();
 548 }
 549
 550 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 551 {
 552     #warning "move this to common code?"
 553     m_logicalOriginX = x * m_signX;   // is this still correct ?
 554     m_logicalOriginY = y * m_signY;
 555     ComputeScaleAndOrigin();
 556 }
 557
 558 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 559 {
 560     #warning "move this to common code?"
 561     // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
 562     m_deviceOriginX = x;
 563     m_deviceOriginY = y;
 564     ComputeScaleAndOrigin();
 565 }
 566
 567 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 568 {
 569     #warning "move this to common code?"
 570     // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
 571     m_signX = (xLeftRight ?  1 : -1);
 572     m_signY = (yBottomUp  ? -1 :  1);
 573     ComputeScaleAndOrigin();
 574 }
 575
 576 // ---------------------------------------------------------------------------
 577 // coordinates transformations
 578 // ---------------------------------------------------------------------------
 579
 580 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
 581 {
 582     return ((wxDC *)this)->XDEV2LOG(x);
 583 }
 584
 585 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
 586 {
 587     return ((wxDC *)this)->YDEV2LOG(y);
 588 }
 589
 590 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
 591 {
 592     return ((wxDC *)this)->XDEV2LOGREL(x);
 593 }
 594
 595 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
 596 {
 597     return ((wxDC *)this)->YDEV2LOGREL(y);
 598 }
 599
 600 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
 601 {
 602     return ((wxDC *)this)->XLOG2DEV(x);
 603 }
 604
 605 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
 606 {
 607     return ((wxDC *)this)->YLOG2DEV(y);
 608 }
 609
 610 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
 611 {
 612     return ((wxDC *)this)->XLOG2DEVREL(x);
 613 }
 614
 615 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
 616 {
 617     return ((wxDC *)this)->YLOG2DEVREL(y);
 618 }
 619
 620
 621 void wxDC::DoGetSize(int *w, int *h) const
 622 {
 623     wxCHECK_RET( Ok(), wxT("invalid dc") );
 624
 625     m_surface->GetSize(w, h);
 626 }
 627
 628 void wxDC::DoGetSizeMM(int *width, int *height) const
 629 {
 630     #warning "move this to common code?"
 631     int w = 0;
 632     int h = 0;
 633     GetSize(&w, &h);
 634     if ( width ) *width = int(double(w) / (m_userScaleX*m_mm_to_pix_x));
 635     if ( height ) *height = int(double(h) / (m_userScaleY*m_mm_to_pix_y));
 636 }
 637
 638 wxSize wxDC::GetPPI() const
 639 {
 640     #warning "move this to common code?"
 641     return wxSize(int(double(m_mm_to_pix_x) * inches2mm),
 642                   int(double(m_mm_to_pix_y) * inches2mm));
 643 }
 644
 645
 646 // ---------------------------------------------------------------------------
 647 // Blitting
 648 // ---------------------------------------------------------------------------
 649
 650 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
 651                   wxCoord width, wxCoord height,
 652                   wxDC *source, wxCoord xsrc, wxCoord ysrc,
 653                   int rop, bool useMask,
 654                   wxCoord xsrcMask, wxCoord ysrcMask)
 655 {
 656     wxCHECK_MSG( Ok(), false, _T("invalid dc") );
 657     wxCHECK_MSG( source, false, _T("invalid source dc") );
 658
 659     // NB: we could also support XOR here (via DSBLIT_XOR)
 660     //     and possibly others via SetSrc/DstBlendFunction()
 661     wxCHECK_MSG( rop == wxCOPY, false, _T("only wxCOPY function supported") );
 662
 663     // transform the source DC coords to the device ones
 664     xsrc = source->LogicalToDeviceX(xsrc);
 665     ysrc = source->LogicalToDeviceY(ysrc);
 666
 667     // FIXME_DFB: use the mask origin when drawing transparently
 668     wxASSERT_MSG( xsrcMask == -1 && ysrcMask == -1,
 669                   _T("non-default source mask offset not implemented") );
 670 #if 0
 671     if (xsrcMask == -1 && ysrcMask == -1)
 672     {
 673         xsrcMask = xsrc; ysrcMask = ysrc;
 674     }
 675     else
 676     {
 677         xsrcMask = source->LogicalToDeviceX(xsrcMask);
 678         ysrcMask = source->LogicalToDeviceY(ysrcMask);
 679     }
 680 #endif
 681
 682     wxMemoryDC *sourceAsMemDC = wxDynamicCast(source, wxMemoryDC);
 683     if ( sourceAsMemDC )
 684     {
 685         DoDrawSubBitmap(sourceAsMemDC->GetSelectedObject(),
 686                         xsrc, ysrc,
 687                         width, height,
 688                         xdest, ydest,
 689                         rop,
 690                         useMask);
 691     }
 692     else
 693     {
 694         return DoBlitFromSurface(source->GetDirectFBSurface(),
 695                                  xsrc, ysrc,
 696                                  width, height,
 697                                  xdest, ydest);
 698     }
 699
 700     return true;
 701 }
 702
 703 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
 704 {
 705     wxCHECK_RET( Ok(), wxT("invalid dc") );
 706     wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
 707
 708     DoDrawSubBitmap(bmp,
 709                     0, 0, bmp.GetWidth(), bmp.GetHeight(),
 710                     x, y,
 711                     m_logicalFunction, useMask);
 712 }
 713
 714 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
 715 {
 716     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 717     DoDrawBitmap((const wxBitmap&)icon, x, y, true);
 718 }
 719
 720 void wxDC::DoDrawSubBitmap(const wxBitmap &bmp,
 721                            wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 722                            wxCoord destx, wxCoord desty, int rop, bool useMask)
 723 {
 724     wxCHECK_RET( Ok(), wxT("invalid dc") );
 725     wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
 726
 727     // NB: we could also support XOR here (via DSBLIT_XOR)
 728     //     and possibly others via SetSrc/DstBlendFunction()
 729     wxCHECK_RET( rop == wxCOPY, _T("only wxCOPY function supported") );
 730
 731     if ( bmp.GetDepth() == 1 )
 732     {
 733         // Mono bitmaps are handled in special way -- all 1s are drawn in
 734         // foreground colours, all 0s in background colour.
 735         wxFAIL_MSG( _T("drawing mono bitmaps not implemented") );
 736         return;
 737     }
 738
 739     if ( useMask && bmp.GetMask() )
 740     {
 741         // FIXME_DFB: see MGL sources for a way to do it, but it's not directly
 742         //            applicable because DirectFB doesn't implement ROPs; OTOH,
 743         //            it has blitting modes that can be useful; finally, see
 744         //            DFB's SetSrcBlendFunction() and SetSrcColorKey()
 745         wxFAIL_MSG( _T("drawing bitmaps with masks not implemented") );
 746         return;
 747     }
 748
 749     DoBlitFromSurface(bmp.GetDirectFBSurface(),
 750                       x, y,
 751                       w, h,
 752                       destx, desty);
 753 }
 754
 755 bool wxDC::DoBlitFromSurface(const wxIDirectFBSurfacePtr& src,
 756                              wxCoord srcx, wxCoord srcy,
 757                              wxCoord w, wxCoord h,
 758                              wxCoord dstx, wxCoord dsty)
 759 {
 760     // don't do anything if the source rectangle is outside of source surface,
 761     // DirectFB would assert in that case:
 762     wxSize srcsize;
 763     src->GetSize(&srcsize.x, &srcsize.y);
 764     if ( !wxRect(srcx, srcy, w, h).Intersects(wxRect(srcsize)) )
 765     {
 766         wxLogDebug(_T("Blitting from area outside of the source surface, caller code needs fixing."));
 767         return false;
 768     }
 769
 770     CalcBoundingBox(dstx, dsty);
 771     CalcBoundingBox(dstx + w, dsty + h);
 772
 773     DFBRectangle srcRect = { srcx, srcy, w, h };
 774     DFBRectangle dstRect = { XLOG2DEV(dstx), YLOG2DEV(dsty),
 775                              XLOG2DEVREL(w), YLOG2DEVREL(h) };
 776
 777     wxIDirectFBSurfacePtr dst(m_surface);
 778
 779     // FIXME: this will have to be different in useMask case, see above
 780     if ( !dst->SetBlittingFlags(DSBLIT_NOFX) )
 781         return false;
 782
 783     if ( srcRect.w != dstRect.w || srcRect.h != dstRect.h )
 784     {
 785         // the bitmap is drawn stretched:
 786         dst->StretchBlit(src, &srcRect, &dstRect);
 787     }
 788     else
 789     {
 790         // no stretching, size is preserved:
 791         dst->Blit(src, &srcRect, dstRect.x, dstRect.y);
 792     }
 793
 794     return true;
 795 }