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     wxFAIL_MSG( _T("SetLogicalFunction not implemented") );
 395
 396     m_logicalFunction = function;
 397 }
 398
 399 bool wxDC::StartDoc(const wxString& WXUNUSED(message))
 400 {
 401     // We might be previewing, so return true to let it continue.
 402     return true;
 403 }
 404
 405 void wxDC::EndDoc()
 406 {
 407 }
 408
 409 void wxDC::StartPage()
 410 {
 411 }
 412
 413 void wxDC::EndPage()
 414 {
 415 }
 416
 417 // ---------------------------------------------------------------------------
 418 // text metrics
 419 // ---------------------------------------------------------------------------
 420
 421 wxCoord wxDC::GetCharHeight() const
 422 {
 423     wxCHECK_MSG( Ok(), -1, wxT("invalid dc") );
 424     wxCHECK_MSG( m_font.Ok(), -1, wxT("no font selected") );
 425
 426     int h = -1;
 427     m_font.GetDirectFBFont()->GetHeight(&h);
 428     return YDEV2LOGREL(h);
 429 }
 430
 431 wxCoord wxDC::GetCharWidth() const
 432 {
 433     wxCHECK_MSG( Ok(), -1, wxT("invalid dc") );
 434     wxCHECK_MSG( m_font.Ok(), -1, wxT("no font selected") );
 435
 436     int w = -1;
 437     m_font.GetDirectFBFont()->GetStringWidth("H", 1, &w);
 438     // VS: YDEV is corrent, it should *not* be XDEV, because font's are only
 439     //     scaled according to m_scaleY
 440     return YDEV2LOGREL(w);
 441 }
 442
 443 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
 444                            wxCoord *descent, wxCoord *externalLeading,
 445                            wxFont *theFont) const
 446 {
 447     wxCHECK_RET( Ok(), wxT("invalid dc") );
 448     wxCHECK_RET( m_font.Ok(), wxT("no font selected") );
 449     wxCHECK_RET( !theFont || theFont->Ok(), wxT("invalid font") );
 450
 451     wxFont oldFont;
 452     if ( theFont != NULL )
 453     {
 454         oldFont = m_font;
 455         wxConstCast(this, wxDC)->SetFont(*theFont);
 456     }
 457
 458     wxCoord xx = 0, yy = 0;
 459     DFBRectangle rect;
 460     wxIDirectFBFontPtr f = m_font.GetDirectFBFont();
 461
 462     if ( f->GetStringExtents(wxSTR_TO_DFB(string), -1, &rect, NULL) )
 463     {
 464         // VS: YDEV is corrent, it should *not* be XDEV, because font's are
 465         //     only scaled according to m_scaleY
 466         xx = YDEV2LOGREL(rect.w);
 467         yy = YDEV2LOGREL(rect.h);
 468
 469         if ( descent )
 470         {
 471             int d;
 472             if ( f->GetDescender(&d) )
 473                 *descent = YDEV2LOGREL(-d);
 474             else
 475                 *descent = 0;
 476         }
 477     }
 478
 479     if ( x ) *x = xx;
 480     if ( y ) *y = yy;
 481     if ( externalLeading ) *externalLeading = 0;
 482
 483     if ( theFont != NULL )
 484         wxConstCast(this, wxDC)->SetFont(oldFont);
 485 }
 486
 487
 488
 489 // ---------------------------------------------------------------------------
 490 // mapping modes
 491 // ---------------------------------------------------------------------------
 492
 493 void wxDC::ComputeScaleAndOrigin()
 494 {
 495     m_scaleX = m_logicalScaleX * m_userScaleX;
 496     m_scaleY = m_logicalScaleY * m_userScaleY;
 497
 498     // FIXME_DFB: scaling affects pixel size of font, pens, brushes, which
 499     //            is not currently implemented here; probably makes sense to
 500     //            switch to Cairo instead of implementing everything for DFB
 501     wxASSERT_MSG( m_scaleX == 1.0 && m_scaleY == 1.0,
 502                   _T("scaling is not implemented in wxDFB") );
 503 }
 504
 505 void wxDC::SetMapMode(int mode)
 506 {
 507     #warning "move this to common code, it's shared by almost all ports!"
 508     switch (mode)
 509     {
 510         case wxMM_TWIPS:
 511           SetLogicalScale(twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y);
 512           break;
 513         case wxMM_POINTS:
 514           SetLogicalScale(pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y);
 515           break;
 516         case wxMM_METRIC:
 517           SetLogicalScale(m_mm_to_pix_x, m_mm_to_pix_y);
 518           break;
 519         case wxMM_LOMETRIC:
 520           SetLogicalScale(m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0);
 521           break;
 522         default:
 523         case wxMM_TEXT:
 524           SetLogicalScale(1.0, 1.0);
 525           break;
 526     }
 527     m_mappingMode = mode;
 528 }
 529
 530 void wxDC::SetUserScale(double x, double y)
 531 {
 532     #warning "move this to common code?"
 533     // allow negative ? -> no
 534     m_userScaleX = x;
 535     m_userScaleY = y;
 536     ComputeScaleAndOrigin();
 537 }
 538
 539 void wxDC::SetLogicalScale(double x, double y)
 540 {
 541     #warning "move this to common code?"
 542     // allow negative ?
 543     m_logicalScaleX = x;
 544     m_logicalScaleY = y;
 545     ComputeScaleAndOrigin();
 546 }
 547
 548 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 549 {
 550     #warning "move this to common code?"
 551     m_logicalOriginX = x * m_signX;   // is this still correct ?
 552     m_logicalOriginY = y * m_signY;
 553     ComputeScaleAndOrigin();
 554 }
 555
 556 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 557 {
 558     #warning "move this to common code?"
 559     // only wxPostScripDC has m_signX = -1, we override SetDeviceOrigin there
 560     m_deviceOriginX = x;
 561     m_deviceOriginY = y;
 562     ComputeScaleAndOrigin();
 563 }
 564
 565 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 566 {
 567     #warning "move this to common code?"
 568     // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
 569     m_signX = (xLeftRight ?  1 : -1);
 570     m_signY = (yBottomUp  ? -1 :  1);
 571     ComputeScaleAndOrigin();
 572 }
 573
 574 // ---------------------------------------------------------------------------
 575 // coordinates transformations
 576 // ---------------------------------------------------------------------------
 577
 578 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
 579 {
 580     return ((wxDC *)this)->XDEV2LOG(x);
 581 }
 582
 583 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
 584 {
 585     return ((wxDC *)this)->YDEV2LOG(y);
 586 }
 587
 588 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
 589 {
 590     return ((wxDC *)this)->XDEV2LOGREL(x);
 591 }
 592
 593 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
 594 {
 595     return ((wxDC *)this)->YDEV2LOGREL(y);
 596 }
 597
 598 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
 599 {
 600     return ((wxDC *)this)->XLOG2DEV(x);
 601 }
 602
 603 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
 604 {
 605     return ((wxDC *)this)->YLOG2DEV(y);
 606 }
 607
 608 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
 609 {
 610     return ((wxDC *)this)->XLOG2DEVREL(x);
 611 }
 612
 613 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
 614 {
 615     return ((wxDC *)this)->YLOG2DEVREL(y);
 616 }
 617
 618
 619 void wxDC::DoGetSize(int *w, int *h) const
 620 {
 621     wxCHECK_RET( Ok(), wxT("invalid dc") );
 622
 623     m_surface->GetSize(w, h);
 624 }
 625
 626 void wxDC::DoGetSizeMM(int *width, int *height) const
 627 {
 628     #warning "move this to common code?"
 629     int w = 0;
 630     int h = 0;
 631     GetSize(&w, &h);
 632     if ( width ) *width = int(double(w) / (m_userScaleX*m_mm_to_pix_x));
 633     if ( height ) *height = int(double(h) / (m_userScaleY*m_mm_to_pix_y));
 634 }
 635
 636 wxSize wxDC::GetPPI() const
 637 {
 638     #warning "move this to common code?"
 639     return wxSize(int(double(m_mm_to_pix_x) * inches2mm),
 640                   int(double(m_mm_to_pix_y) * inches2mm));
 641 }
 642
 643
 644 // ---------------------------------------------------------------------------
 645 // Blitting
 646 // ---------------------------------------------------------------------------
 647
 648 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
 649                   wxCoord width, wxCoord height,
 650                   wxDC *source, wxCoord xsrc, wxCoord ysrc,
 651                   int rop, bool useMask,
 652                   wxCoord xsrcMask, wxCoord ysrcMask)
 653 {
 654 #warning "FIXME"
 655     return false;
 656 #if 0
 657     wxCHECK_MSG( Ok(), false, wxT("invalid dc") );
 658     wxCHECK_MSG( source, false, wxT("invalid source dc") );
 659
 660     // transform the source DC coords to the device ones
 661     xsrc = source->LogicalToDeviceX(xsrc);
 662     ysrc = source->LogicalToDeviceY(ysrc);
 663
 664     /* FIXME_MGL: use the mask origin when drawing transparently */
 665     if (xsrcMask == -1 && ysrcMask == -1)
 666     {
 667         xsrcMask = xsrc; ysrcMask = ysrc;
 668     }
 669     else
 670     {
 671         xsrcMask = source->LogicalToDeviceX(xsrcMask);
 672         ysrcMask = source->LogicalToDeviceY(ysrcMask);
 673     }
 674
 675     CalcBoundingBox(xdest, ydest);
 676     CalcBoundingBox(xdest + width, ydest + height);
 677
 678     /* scale/translate size and position */
 679     wxCoord xx = XLOG2DEV(xdest);
 680     wxCoord yy = YLOG2DEV(ydest);
 681     wxCoord ww = XLOG2DEVREL(width);
 682     wxCoord hh = YLOG2DEVREL(height);
 683
 684     if ( source->m_isMemDC )
 685     {
 686         wxMemoryDC *memDC = (wxMemoryDC*) source;
 687         DoDrawSubBitmap(memDC->GetSelectedObject(), xsrc, ysrc, ww, hh,
 688                         xdest, ydest, rop, useMask);
 689     }
 690     else
 691     {
 692         m_MGLDC->makeCurrent(); // will go away with MGL6.0
 693         m_MGLDC->bitBlt(*source->GetMGLDC(),
 694                         xsrc, ysrc, xsrc + ww, ysrc + hh,
 695                         xx, yy, LogicalFunctionToMGLRop(rop));
 696     }
 697
 698     return true;
 699 #endif
 700 }
 701
 702 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
 703 {
 704     wxCHECK_RET( Ok(), wxT("invalid dc") );
 705     wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
 706
 707     wxCoord w = bmp.GetWidth();
 708     wxCoord h = bmp.GetHeight();
 709
 710     DoDrawSubBitmap(bmp, 0, 0, w, h, x, y, m_logicalFunction, useMask);
 711 }
 712
 713 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
 714 {
 715     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 716     DoDrawBitmap((const wxBitmap&)icon, x, y, true);
 717 }
 718
 719 void wxDC::DoDrawSubBitmap(const wxBitmap &bmp,
 720                            wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 721                            wxCoord destx, wxCoord desty, int rop, bool useMask)
 722 {
 723 #if 0
 724     wxCHECK_RET( Ok(), wxT("invalid dc") );
 725     wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
 726
 727     CalcBoundingBox(x, y);
 728     CalcBoundingBox(x + w, y + h);
 729
 730     wxCoord dx = XLOG2DEV(destx);
 731     wxCoord dy = YLOG2DEV(desty);
 732     wxCoord dw = XLOG2DEVREL(w);
 733     wxCoord dh = YLOG2DEVREL(h);
 734
 735     m_MGLDC->makeCurrent(); // will go away with MGL6.0
 736
 737     bool useStretching = ((w != dw) || (h != dh));
 738     bool putSection = (w != bmp.GetWidth() || h != bmp.GetHeight());
 739     MGL_writeModeType mglRop = (MGL_writeModeType)LogicalFunctionToMGLRop(rop);
 740
 741     if ( bmp.GetDepth() == 1 )
 742     {
 743         // Mono bitmaps are handled in special way -- all 1s are drawn in
 744         // foreground colours, all 0s in background colour.
 745
 746         ((wxBitmap&)bmp).SetMonoPalette(m_textForegroundColour, m_textBackgroundColour);
 747     }
 748
 749     if ( useMask && bmp.GetMask() )
 750     {
 751         // Since MGL does not support masks directly (in MGL, mask is handled
 752         // in same way as in wxImage, i.e. there is one "key" color), we
 753         // simulate masked bitblt in 6 steps (same as in MSW):
 754         //
 755         // 1. Create a temporary bitmap and copy the destination area into it.
 756         // 2. Copy the source area into the temporary bitmap using the
 757         //    specified logical function.
 758         // 3. Set the masked area in the temporary bitmap to BLACK by ANDing
 759         //    the mask bitmap with the temp bitmap with the foreground colour
 760         //    set to WHITE and the bg colour set to BLACK.
 761         // 4. Set the unmasked area in the destination area to BLACK by
 762         //    ANDing the mask bitmap with the destination area with the
 763         //    foreground colour set to BLACK and the background colour set
 764         //    to WHITE.
 765         // 5. OR the temporary bitmap with the destination area.
 766         // 6. Delete the temporary bitmap.
 767         //
 768         // This sequence of operations ensures that the source's transparent
 769         // area need not be black, and logical functions are supported.
 770
 771         wxBitmap *mask = bmp.GetMask()->GetBitmap();
 772
 773         MGLMemoryDC *temp;
 774
 775         if ( GetDepth() <= 8 )
 776         {
 777             temp = new MGLMemoryDC(dw, dh, GetDepth(), NULL);
 778             wxDC tempdc;
 779             tempdc.SetMGLDC(temp, false);
 780             tempdc.SetPalette(m_palette);
 781         }
 782         else
 783         {
 784             pixel_format_t pf;
 785             m_MGLDC->getPixelFormat(pf);
 786             temp = new MGLMemoryDC(dw, dh, GetDepth(), &pf);
 787         }
 788
 789         wxCHECK_RET( temp->isValid(), wxT("cannot create temporary dc") );
 790
 791         temp->bitBlt(*m_MGLDC, dx, dy, dx + dw, dy + dh, 0, 0, MGL_REPLACE_MODE);
 792
 793         DoBitBlt(bmp, temp, x, y, w, h, 0, 0, dw, dh, mglRop,
 794                  useStretching, putSection);
 795
 796         mask->SetMonoPalette(wxColour(0,0,0), wxColour(255,255,255));
 797         DoBitBlt(*mask, temp, x, y, w, h, 0, 0, dw, dh, MGL_R2_MASKSRC,
 798                  useStretching, putSection);
 799         DoBitBlt(*mask, m_MGLDC, x, y, w, h, dx, dy, dw, dh, MGL_R2_MASKNOTSRC,
 800                  useStretching, putSection);
 801
 802         m_MGLDC->bitBlt(*temp, 0, 0, dw, dh, dx, dy, MGL_OR_MODE);
 803
 804         delete temp;
 805     }
 806
 807     else
 808     {
 809         DoBitBlt(bmp, m_MGLDC, x, y, w, h, dx, dy, dw, dh, mglRop,
 810                  useStretching, putSection);
 811     }
 812 #endif
 813 }