src/dfb/dc.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/dfb/dc.cpp
   3 // Purpose:     wxDFBDCImpl 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/dcmemory.h"
  28     #include "wx/log.h"
  29 #endif
  30
  31 #include "wx/dfb/dc.h"
  32 #include "wx/dfb/private.h"
  33
  34 // these values are used to initialize newly created DC
  35 #define DEFAULT_FONT      (*wxNORMAL_FONT)
  36 #define DEFAULT_PEN       (*wxBLACK_PEN)
  37 #define DEFAULT_BRUSH     (*wxWHITE_BRUSH)
  38
  39 // ===========================================================================
  40 // implementation
  41 // ===========================================================================
  42
  43 //-----------------------------------------------------------------------------
  44 // wxDFBDCImpl
  45 //-----------------------------------------------------------------------------
  46
  47 IMPLEMENT_ABSTRACT_CLASS(wxDFBDCImpl, wxDCImpl)
  48
  49 void wxDFBDCImpl::DFBInit(const wxIDirectFBSurfacePtr& surface)
  50 {
  51     m_surface = surface;
  52
  53     wxCHECK_RET( surface != NULL, "invalid surface" );
  54
  55     m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
  56                     (double)wxGetDisplaySizeMM().GetWidth();
  57     m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
  58                     (double)wxGetDisplaySizeMM().GetHeight();
  59
  60     SetFont(DEFAULT_FONT);
  61     SetPen(DEFAULT_PEN);
  62     SetBrush(DEFAULT_BRUSH);
  63 }
  64
  65
  66 // ---------------------------------------------------------------------------
  67 // clipping
  68 // ---------------------------------------------------------------------------
  69
  70 void wxDFBDCImpl::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
  71 {
  72     wxCHECK_RET( IsOk(), wxT("invalid dc") );
  73
  74     wxSize size(GetSize());
  75
  76     wxASSERT_MSG( !m_clipping,
  77                   "narrowing clipping region not implemented yet" );
  78
  79     // NB: We intersect the clipping rectangle with surface's area here because
  80     //     DirectFB will return an error if you try to set clipping rectangle
  81     //     that is partially outside of the surface.
  82     DFBRegion r;
  83     r.x1 = wxMax(0, XLOG2DEV(cx));
  84     r.y1 = wxMax(0, YLOG2DEV(cy));
  85     r.x2 = wxMin(r.x1 + XLOG2DEVREL(cw), size.x) - 1;
  86     r.y2 = wxMin(r.y1 + YLOG2DEVREL(ch), size.y) - 1;
  87
  88     if ( !m_surface->SetClip(&r) )
  89         return;
  90
  91     m_clipX1 = cx;
  92     m_clipY1 = cy;
  93     m_clipX2 = cx + cw - 1;
  94     m_clipY2 = cy + ch -1;
  95     m_clipping = true;
  96 }
  97
  98 void wxDFBDCImpl::DoSetDeviceClippingRegion(const wxRegion& region)
  99 {
 100     // NB: this can be done because wxDFB only supports rectangular regions
 101     wxRect rect = region.AsRect();
 102
 103     // our parameter is in physical coordinates while DoSetClippingRegion()
 104     // takes logical ones
 105     rect.x = XDEV2LOG(rect.x);
 106     rect.y = YDEV2LOG(rect.y);
 107     rect.width = XDEV2LOG(rect.width);
 108     rect.height = YDEV2LOG(rect.height);
 109
 110     DoSetClippingRegion(rect);
 111 }
 112
 113 void wxDFBDCImpl::DestroyClippingRegion()
 114 {
 115     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 116
 117     m_surface->SetClip(NULL);
 118
 119     ResetClipping();
 120 }
 121
 122 // ---------------------------------------------------------------------------
 123 // query capabilities
 124 // ---------------------------------------------------------------------------
 125
 126 int wxDFBDCImpl::GetDepth() const
 127 {
 128     return m_surface->GetDepth();
 129 }
 130
 131 // ---------------------------------------------------------------------------
 132 // drawing
 133 // ---------------------------------------------------------------------------
 134
 135 void wxDFBDCImpl::Clear()
 136 {
 137     wxCHECK_RET( IsOk(), 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     wxSize size(GetSize());
 146     CalcBoundingBox(XDEV2LOG(0), YDEV2LOG(0));
 147     CalcBoundingBox(XDEV2LOG(size.x), YDEV2LOG(size.y));
 148 }
 149
 150 extern bool wxDoFloodFill(wxDC *dc, wxCoord x, wxCoord y,
 151                           const wxColour & col, int style);
 152
 153 bool wxDFBDCImpl::DoFloodFill(wxCoord x, wxCoord y,
 154                        const wxColour& col, int style)
 155 {
 156     return wxDoFloodFill(GetOwner(), x, y, col, style);
 157 }
 158
 159 bool wxDFBDCImpl::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
 160 {
 161     wxCHECK_MSG( col, false, "NULL colour parameter in wxDFBDCImpl::GetPixel");
 162
 163     wxFAIL_MSG( "GetPixel not implemented" );
 164
 165     wxUnusedVar(x);
 166     wxUnusedVar(y);
 167
 168     return false;
 169 }
 170
 171 void wxDFBDCImpl::DoCrossHair(wxCoord x, wxCoord y)
 172 {
 173     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 174
 175     wxFAIL_MSG( "CrossHair not implemented" );
 176
 177     wxUnusedVar(x);
 178     wxUnusedVar(y);
 179 }
 180
 181 void wxDFBDCImpl::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 182 {
 183     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 184
 185     if ( m_pen.GetStyle() == wxTRANSPARENT )
 186         return;
 187
 188     wxCoord xx1 = XLOG2DEV(x1);
 189     wxCoord yy1 = YLOG2DEV(y1);
 190     wxCoord xx2 = XLOG2DEV(x2);
 191     wxCoord yy2 = YLOG2DEV(y2);
 192
 193     // FIXME: DrawLine() shouldn't draw the last pixel, but DFB's DrawLine()
 194     //        does draw it. We should undo any change to the last pixel by
 195     //        using GetPixel() and PutPixel(), but until they are implemented,
 196     //        handle at least the special case of vertical and horizontal
 197     //        lines correctly:
 198     if ( xx1 == xx2 )
 199     {
 200         if ( yy1 < yy2 )
 201             yy2--;
 202         else if ( yy1 > yy2 )
 203             yy2++;
 204     }
 205     if ( yy1 == yy2 )
 206     {
 207         if ( xx1 < xx2 )
 208             xx2--;
 209         else if ( xx1 > xx2 )
 210             xx2++;
 211     }
 212
 213     m_surface->DrawLine(xx1, yy1, xx2, yy2);
 214
 215     CalcBoundingBox(x1, y1);
 216     CalcBoundingBox(x2, y2);
 217 }
 218
 219 // Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1)
 220 // and ending at (x2, y2)
 221 void wxDFBDCImpl::DoDrawArc(wxCoord WXUNUSED(x1), wxCoord WXUNUSED(y1),
 222                             wxCoord WXUNUSED(x2), wxCoord WXUNUSED(y2),
 223                             wxCoord WXUNUSED(xc), wxCoord WXUNUSED(yc))
 224 {
 225     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 226
 227     wxFAIL_MSG( "DrawArc not implemented" );
 228 }
 229
 230 void wxDFBDCImpl::DoDrawPoint(wxCoord x, wxCoord y)
 231 {
 232     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 233
 234     // NB: DirectFB API doesn't provide a function for drawing points, so
 235     //     implement it as 1px long line. This is inefficient, but then, so is
 236     //     using DrawPoint() for drawing more than a few points.
 237     DoDrawLine(x, y, x, y);
 238
 239     // FIXME_DFB: implement special cases for common formats (RGB24,RGBA/RGB32)
 240 }
 241
 242 void wxDFBDCImpl::DoDrawPolygon(int WXUNUSED(n), wxPoint WXUNUSED(points)[],
 243                                 wxCoord WXUNUSED(xoffset), wxCoord WXUNUSED(yoffset),
 244                                 int WXUNUSED(fillStyle))
 245 {
 246     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 247
 248     wxFAIL_MSG( "DrawPolygon not implemented" );
 249 }
 250
 251 void wxDFBDCImpl::DoDrawLines(int WXUNUSED(n), wxPoint WXUNUSED(points)[],
 252                               wxCoord WXUNUSED(xoffset), wxCoord WXUNUSED(yoffset))
 253 {
 254     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 255
 256     // TODO: impl. using DirectDB's DrawLines
 257     wxFAIL_MSG( "DrawLines not implemented" );
 258 }
 259
 260 void wxDFBDCImpl::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 261 {
 262     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 263
 264     wxCoord xx = XLOG2DEV(x);
 265     wxCoord yy = YLOG2DEV(y);
 266     wxCoord ww = m_signX * XLOG2DEVREL(width);
 267     wxCoord hh = m_signY * YLOG2DEVREL(height);
 268
 269     if ( ww == 0 || hh == 0 ) return;
 270
 271     if ( ww < 0 )
 272     {
 273         ww = -ww;
 274         xx = xx - ww;
 275     }
 276     if ( hh < 0 )
 277     {
 278         hh = -hh;
 279         yy = yy - hh;
 280     }
 281
 282     if ( m_brush.GetStyle() != wxTRANSPARENT )
 283     {
 284         SelectColour(m_brush.GetColour());
 285         m_surface->FillRectangle(xx, yy, ww, hh);
 286         // restore pen's colour, because other drawing functions expect the
 287         // colour to be set to the pen:
 288         SelectColour(m_pen.GetColour());
 289     }
 290
 291     if ( m_pen.GetStyle() != wxTRANSPARENT )
 292     {
 293         m_surface->DrawRectangle(xx, yy, ww, hh);
 294     }
 295
 296     CalcBoundingBox(x, y);
 297     CalcBoundingBox(x + width, y + height);
 298 }
 299
 300 void wxDFBDCImpl::DoDrawRoundedRectangle(wxCoord WXUNUSED(x),
 301                                          wxCoord WXUNUSED(y),
 302                                          wxCoord WXUNUSED(width),
 303                                          wxCoord WXUNUSED(height),
 304                                          double WXUNUSED(radius))
 305 {
 306     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 307
 308     wxFAIL_MSG( "DrawRoundedRectangle not implemented" );
 309 }
 310
 311 void wxDFBDCImpl::DoDrawEllipse(wxCoord WXUNUSED(x),
 312                                 wxCoord WXUNUSED(y),
 313                                 wxCoord WXUNUSED(width),
 314                                 wxCoord WXUNUSED(height))
 315 {
 316     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 317
 318     wxFAIL_MSG( "DrawElipse not implemented" );
 319 }
 320
 321 void wxDFBDCImpl::DoDrawEllipticArc(wxCoord WXUNUSED(x),
 322                                     wxCoord WXUNUSED(y),
 323                                     wxCoord WXUNUSED(w),
 324                                     wxCoord WXUNUSED(h),
 325                                     double WXUNUSED(sa),
 326                                     double WXUNUSED(ea))
 327 {
 328     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 329
 330     wxFAIL_MSG( "DrawElipticArc not implemented" );
 331 }
 332
 333 void wxDFBDCImpl::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
 334 {
 335     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 336
 337     wxCoord xx = XLOG2DEV(x);
 338     wxCoord yy = YLOG2DEV(y);
 339
 340     // update the bounding box
 341     wxCoord w, h;
 342     CalcBoundingBox(x, y);
 343     DoGetTextExtent(text, &w, &h);
 344     CalcBoundingBox(x + w, y + h);
 345
 346     // if background mode is solid, DrawText must paint text's background:
 347     if ( m_backgroundMode == wxSOLID )
 348     {
 349         wxCHECK_RET( m_textBackgroundColour.Ok(),
 350                      wxT("invalid background color") );
 351
 352         SelectColour(m_textBackgroundColour);
 353         m_surface->FillRectangle(xx, yy, XLOG2DEVREL(w), YLOG2DEVREL(h));
 354     }
 355
 356     // finally draw the text itself:
 357     wxCHECK_RET( m_textForegroundColour.Ok(),
 358                  wxT("invalid foreground color") );
 359     SelectColour(m_textForegroundColour);
 360     m_surface->DrawString(text.utf8_str(), -1, xx, yy, DSTF_LEFT | DSTF_TOP);
 361
 362     // restore pen's colour, because other drawing functions expect the colour
 363     // to be set to the pen:
 364     SelectColour(m_pen.GetColour());
 365 }
 366
 367 void wxDFBDCImpl::DoDrawRotatedText(const wxString& WXUNUSED(text),
 368                                     wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 369                                     double WXUNUSED(angle))
 370 {
 371     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 372
 373     wxFAIL_MSG( "DrawRotatedText not implemented" );
 374 }
 375
 376 // ---------------------------------------------------------------------------
 377 // set GDI objects
 378 // ---------------------------------------------------------------------------
 379
 380 void wxDFBDCImpl::SetPen(const wxPen& pen)
 381 {
 382     m_pen = pen.Ok() ? pen : DEFAULT_PEN;
 383
 384     SelectColour(m_pen.GetColour());
 385 }
 386
 387 void wxDFBDCImpl::SetBrush(const wxBrush& brush)
 388 {
 389     m_brush = brush.Ok() ? brush : DEFAULT_BRUSH;
 390 }
 391
 392 void wxDFBDCImpl::SelectColour(const wxColour& clr)
 393 {
 394     m_surface->SetColor(clr.Red(), clr.Green(), clr.Blue(), clr.Alpha());
 395     #warning "use SetColorIndex?"
 396 }
 397
 398 #if wxUSE_PALETTE
 399 void wxDFBDCImpl::SetPalette(const wxPalette& WXUNUSED(palette))
 400 {
 401     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 402
 403     wxFAIL_MSG( "SetPalette not implemented" );
 404 }
 405 #endif // wxUSE_PALETTE
 406
 407 void wxDFBDCImpl::SetFont(const wxFont& font)
 408 {
 409     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 410
 411     wxFont f(font.Ok() ? font : DEFAULT_FONT);
 412
 413     wxFont oldfont(m_font);
 414
 415     m_font = f;
 416
 417     if ( !m_surface->SetFont(GetCurrentFont()) )
 418     {
 419         m_font = oldfont;
 420         return;
 421     }
 422 }
 423
 424 wxIDirectFBFontPtr wxDFBDCImpl::GetCurrentFont() const
 425 {
 426     bool aa = (GetDepth() > 8);
 427     return m_font.GetDirectFBFont(aa);
 428 }
 429
 430 void wxDFBDCImpl::SetBackground(const wxBrush& brush)
 431 {
 432     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 433
 434     if (!brush.Ok()) return;
 435
 436     m_backgroundBrush = brush;
 437 }
 438
 439 void wxDFBDCImpl::SetBackgroundMode(int mode)
 440 {
 441     m_backgroundMode = mode;
 442 }
 443
 444 void wxDFBDCImpl::SetLogicalFunction(int function)
 445 {
 446     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 447
 448     // NB: we could also support XOR, but for blitting only (via DSBLIT_XOR);
 449     //     and possibly others via SetSrc/DstBlendFunction()
 450     wxASSERT_MSG( function == wxCOPY,
 451                   "only wxCOPY logical function supported" );
 452
 453     m_logicalFunction = function;
 454 }
 455
 456 bool wxDFBDCImpl::StartDoc(const wxString& WXUNUSED(message))
 457 {
 458     // We might be previewing, so return true to let it continue.
 459     return true;
 460 }
 461
 462 void wxDFBDCImpl::EndDoc()
 463 {
 464 }
 465
 466 void wxDFBDCImpl::StartPage()
 467 {
 468 }
 469
 470 void wxDFBDCImpl::EndPage()
 471 {
 472 }
 473
 474 // ---------------------------------------------------------------------------
 475 // text metrics
 476 // ---------------------------------------------------------------------------
 477
 478 wxCoord wxDFBDCImpl::GetCharHeight() const
 479 {
 480     wxCHECK_MSG( IsOk(), -1, wxT("invalid dc") );
 481     wxCHECK_MSG( m_font.Ok(), -1, wxT("no font selected") );
 482
 483     int h = -1;
 484     GetCurrentFont()->GetHeight(&h);
 485     return YDEV2LOGREL(h);
 486 }
 487
 488 wxCoord wxDFBDCImpl::GetCharWidth() const
 489 {
 490     wxCHECK_MSG( IsOk(), -1, wxT("invalid dc") );
 491     wxCHECK_MSG( m_font.Ok(), -1, wxT("no font selected") );
 492
 493     int w = -1;
 494     GetCurrentFont()->GetStringWidth("H", 1, &w);
 495     // VS: YDEV is corrent, it should *not* be XDEV, because font's are only
 496     //     scaled according to m_scaleY
 497     return YDEV2LOGREL(w);
 498 }
 499
 500 void wxDFBDCImpl::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
 501                            wxCoord *descent, wxCoord *externalLeading,
 502                            const wxFont *theFont) const
 503 {
 504     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 505     wxCHECK_RET( m_font.Ok(), wxT("no font selected") );
 506     wxCHECK_RET( !theFont || theFont->Ok(), wxT("invalid font") );
 507
 508     wxFont oldFont;
 509     if ( theFont != NULL )
 510     {
 511         oldFont = m_font;
 512         wxConstCast(this, wxDFBDCImpl)->SetFont(*theFont);
 513     }
 514
 515     wxCoord xx = 0, yy = 0;
 516     DFBRectangle rect;
 517     wxIDirectFBFontPtr f = GetCurrentFont();
 518
 519     if ( f->GetStringExtents(string.utf8_str(), -1, &rect, NULL) )
 520     {
 521         // VS: YDEV is corrent, it should *not* be XDEV, because font's are
 522         //     only scaled according to m_scaleY
 523         xx = YDEV2LOGREL(rect.w);
 524         yy = YDEV2LOGREL(rect.h);
 525
 526         if ( descent )
 527         {
 528             int d;
 529             if ( f->GetDescender(&d) )
 530                 *descent = YDEV2LOGREL(-d);
 531             else
 532                 *descent = 0;
 533         }
 534     }
 535
 536     if ( x ) *x = xx;
 537     if ( y ) *y = yy;
 538     if ( externalLeading ) *externalLeading = 0;
 539
 540     if ( theFont != NULL )
 541         wxConstCast(this, wxDFBDCImpl)->SetFont(oldFont);
 542 }
 543
 544
 545
 546 // ---------------------------------------------------------------------------
 547 // mapping modes
 548 // ---------------------------------------------------------------------------
 549
 550 // FIXME_DFB: scaling affects pixel size of font, pens, brushes, which
 551 //            is not currently implemented here; probably makes sense to
 552 //            switch to Cairo instead of implementing everything for DFB
 553
 554 void wxDFBDCImpl::DoGetSize(int *w, int *h) const
 555 {
 556     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 557
 558     m_surface->GetSize(w, h);
 559 }
 560
 561 void wxDFBDCImpl::DoGetSizeMM(int *width, int *height) const
 562 {
 563     #warning "move this to common code?"
 564     int w = 0;
 565     int h = 0;
 566     GetSize(&w, &h);
 567     if ( width ) *width = int(double(w) / (m_userScaleX*m_mm_to_pix_x));
 568     if ( height ) *height = int(double(h) / (m_userScaleY*m_mm_to_pix_y));
 569 }
 570
 571 wxSize wxDFBDCImpl::GetPPI() const
 572 {
 573     #warning "move this to common code?"
 574     return wxSize(int(double(m_mm_to_pix_x) * inches2mm),
 575                   int(double(m_mm_to_pix_y) * inches2mm));
 576 }
 577
 578
 579 // ---------------------------------------------------------------------------
 580 // Blitting
 581 // ---------------------------------------------------------------------------
 582
 583 bool wxDFBDCImpl::DoBlit(wxCoord xdest, wxCoord ydest,
 584                          wxCoord width, wxCoord height,
 585                          wxDC *source, wxCoord xsrc, wxCoord ysrc,
 586                          int rop, bool useMask,
 587                          wxCoord xsrcMask, wxCoord ysrcMask)
 588 {
 589     wxCHECK_MSG( IsOk(), false, "invalid dc" );
 590     wxCHECK_MSG( source, false, "invalid source dc" );
 591
 592     // NB: we could also support XOR here (via DSBLIT_XOR)
 593     //     and possibly others via SetSrc/DstBlendFunction()
 594     wxCHECK_MSG( rop == wxCOPY, false, "only wxCOPY function supported" );
 595
 596     // transform the source DC coords to the device ones
 597     xsrc = source->LogicalToDeviceX(xsrc);
 598     ysrc = source->LogicalToDeviceY(ysrc);
 599
 600     // FIXME_DFB: use the mask origin when drawing transparently
 601     wxASSERT_MSG( xsrcMask == -1 && ysrcMask == -1,
 602                   "non-default source mask offset not implemented" );
 603 #if 0
 604     if (xsrcMask == -1 && ysrcMask == -1)
 605     {
 606         xsrcMask = xsrc; ysrcMask = ysrc;
 607     }
 608     else
 609     {
 610         xsrcMask = source->LogicalToDeviceX(xsrcMask);
 611         ysrcMask = source->LogicalToDeviceY(ysrcMask);
 612     }
 613 #endif
 614
 615     wxMemoryDC *sourceAsMemDC = wxDynamicCast(source, wxMemoryDC);
 616     if ( sourceAsMemDC )
 617     {
 618         DoDrawSubBitmap(sourceAsMemDC->GetSelectedBitmap(),
 619                         xsrc, ysrc,
 620                         width, height,
 621                         xdest, ydest,
 622                         rop,
 623                         useMask);
 624     }
 625     else
 626     {
 627         return DoBlitFromSurface
 628                (
 629                  static_cast<wxDFBDCImpl *>(source->GetImpl())
 630                     ->GetDirectFBSurface(),
 631                  xsrc, ysrc,
 632                  width, height,
 633                  xdest, ydest
 634                );
 635     }
 636
 637     return true;
 638 }
 639
 640 void wxDFBDCImpl::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
 641 {
 642     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 643     wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
 644
 645     DoDrawSubBitmap(bmp,
 646                     0, 0, bmp.GetWidth(), bmp.GetHeight(),
 647                     x, y,
 648                     m_logicalFunction, useMask);
 649 }
 650
 651 void wxDFBDCImpl::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
 652 {
 653     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 654     DoDrawBitmap((const wxBitmap&)icon, x, y, true);
 655 }
 656
 657 void wxDFBDCImpl::DoDrawSubBitmap(const wxBitmap &bmp,
 658                            wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 659                            wxCoord destx, wxCoord desty, int rop, bool useMask)
 660 {
 661     wxCHECK_RET( IsOk(), wxT("invalid dc") );
 662     wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
 663
 664     // NB: we could also support XOR here (via DSBLIT_XOR)
 665     //     and possibly others via SetSrc/DstBlendFunction()
 666     wxCHECK_RET( rop == wxCOPY, "only wxCOPY function supported" );
 667
 668     if ( bmp.GetDepth() == 1 )
 669     {
 670         // Mono bitmaps are handled in special way -- all 1s are drawn in
 671         // foreground colours, all 0s in background colour.
 672         wxFAIL_MSG( "drawing mono bitmaps not implemented" );
 673         return;
 674     }
 675
 676     if ( useMask && bmp.GetMask() )
 677     {
 678         // FIXME_DFB: see MGL sources for a way to do it, but it's not directly
 679         //            applicable because DirectFB doesn't implement ROPs; OTOH,
 680         //            it has blitting modes that can be useful; finally, see
 681         //            DFB's SetSrcBlendFunction() and SetSrcColorKey()
 682         wxFAIL_MSG( "drawing bitmaps with masks not implemented" );
 683         return;
 684     }
 685
 686     DoBlitFromSurface(bmp.GetDirectFBSurface(),
 687                       x, y,
 688                       w, h,
 689                       destx, desty);
 690 }
 691
 692 bool wxDFBDCImpl::DoBlitFromSurface(const wxIDirectFBSurfacePtr& src,
 693                                     wxCoord srcx, wxCoord srcy,
 694                                     wxCoord w, wxCoord h,
 695                                     wxCoord dstx, wxCoord dsty)
 696 {
 697     // don't do anything if the source rectangle is outside of source surface,
 698     // DirectFB would assert in that case:
 699     wxSize srcsize;
 700     src->GetSize(&srcsize.x, &srcsize.y);
 701     if ( !wxRect(srcx, srcy, w, h).Intersects(wxRect(srcsize)) )
 702     {
 703         wxLogDebug("Blitting from area outside of the source surface, caller code needs fixing.");
 704         return false;
 705     }
 706
 707     CalcBoundingBox(dstx, dsty);
 708     CalcBoundingBox(dstx + w, dsty + h);
 709
 710     DFBRectangle srcRect = { srcx, srcy, w, h };
 711     DFBRectangle dstRect = { XLOG2DEV(dstx), YLOG2DEV(dsty),
 712                              XLOG2DEVREL(w), YLOG2DEVREL(h) };
 713
 714     wxIDirectFBSurfacePtr dst(m_surface);
 715
 716     // FIXME: this will have to be different in useMask case, see above
 717     DFBSurfaceBlittingFlags blitFlag = (src->GetPixelFormat() == DSPF_ARGB)
 718                                        ? DSBLIT_BLEND_ALPHACHANNEL
 719                                        : DSBLIT_NOFX;
 720     if ( !dst->SetBlittingFlags(blitFlag) )
 721         return false;
 722
 723     if ( srcRect.w != dstRect.w || srcRect.h != dstRect.h )
 724     {
 725         // the bitmap is drawn stretched:
 726         dst->StretchBlit(src, &srcRect, &dstRect);
 727     }
 728     else
 729     {
 730         // no stretching, size is preserved:
 731         dst->Blit(src, &srcRect, dstRect.x, dstRect.y);
 732     }
 733
 734     return true;
 735 }