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