src/common/dcgraph.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/graphcmn.cpp
   3 // Purpose:     graphics context methods common to all platforms
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #if defined(__BORLANDC__)
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_GRAPHICS_CONTEXT
  20
  21 #include "wx/graphics.h"
  22 #include "wx/dcgraph.h"
  23
  24 #ifndef WX_PRECOMP
  25     #include "wx/icon.h"
  26     #include "wx/bitmap.h"
  27     #include "wx/dcmemory.h"
  28     #include "wx/region.h"
  29 #endif
  30
  31 #include "wx/dcclient.h"
  32
  33 #ifdef __WXOSX__
  34 #ifdef __WXOSX_IPHONE__
  35     #include <CoreGraphics/CoreGraphics.h>
  36 #else
  37     #include <ApplicationServices/ApplicationServices.h>
  38 #endif
  39 #endif
  40
  41 //-----------------------------------------------------------------------------
  42 // constants
  43 //-----------------------------------------------------------------------------
  44
  45 static const double RAD2DEG = 180.0 / M_PI;
  46
  47 //-----------------------------------------------------------------------------
  48 // Local functions
  49 //-----------------------------------------------------------------------------
  50
  51 static inline double DegToRad(double deg)
  52 {
  53     return (deg * M_PI) / 180.0;
  54 }
  55
  56 //-----------------------------------------------------------------------------
  57 // wxDC bridge class
  58 //-----------------------------------------------------------------------------
  59
  60 IMPLEMENT_DYNAMIC_CLASS(wxGCDC, wxDC)
  61
  62 wxGCDC::wxGCDC(const wxWindowDC& dc) :
  63   wxDC( new wxGCDCImpl( this, dc ) )
  64 {
  65 }
  66
  67 wxGCDC::wxGCDC( const wxMemoryDC& dc) :
  68   wxDC( new wxGCDCImpl( this, dc ) )
  69 {
  70 }
  71
  72 #if wxUSE_PRINTING_ARCHITECTURE
  73 wxGCDC::wxGCDC( const wxPrinterDC& dc) :
  74   wxDC( new wxGCDCImpl( this, dc ) )
  75 {
  76 }
  77 #endif
  78
  79 wxGCDC::wxGCDC() :
  80   wxDC( new wxGCDCImpl( this ) )
  81 {
  82 }
  83
  84 wxGCDC::~wxGCDC()
  85 {
  86 }
  87
  88 wxGraphicsContext* wxGCDC::GetGraphicsContext()
  89 {
  90     if (!m_pimpl) return NULL;
  91     wxGCDCImpl *gc_impl = (wxGCDCImpl*) m_pimpl;
  92     return gc_impl->GetGraphicsContext();
  93 }
  94
  95 void wxGCDC::SetGraphicsContext( wxGraphicsContext* ctx )
  96 {
  97     if (!m_pimpl) return;
  98     wxGCDCImpl *gc_impl = (wxGCDCImpl*) m_pimpl;
  99     gc_impl->SetGraphicsContext( ctx );
 100 }
 101
 102 IMPLEMENT_ABSTRACT_CLASS(wxGCDCImpl, wxDCImpl)
 103
 104 wxGCDCImpl::wxGCDCImpl( wxDC *owner ) :
 105    wxDCImpl( owner )
 106 {
 107     Init();
 108 }
 109
 110 void wxGCDCImpl::SetGraphicsContext( wxGraphicsContext* ctx )
 111 {
 112     delete m_graphicContext;
 113     m_graphicContext = ctx;
 114     if ( m_graphicContext )
 115     {
 116         m_matrixOriginal = m_graphicContext->GetTransform();
 117         m_ok = true;
 118         // apply the stored transformations to the passed in context
 119         ComputeScaleAndOrigin();
 120         m_graphicContext->SetFont( m_font , m_textForegroundColour );
 121         m_graphicContext->SetPen( m_pen );
 122         m_graphicContext->SetBrush( m_brush);
 123     }
 124 }
 125
 126 wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxWindowDC& dc ) :
 127    wxDCImpl( owner )
 128 {
 129     Init();
 130     SetGraphicsContext( wxGraphicsContext::Create(dc) );
 131     m_window = dc.GetWindow();
 132 }
 133
 134 wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxMemoryDC& dc ) :
 135    wxDCImpl( owner )
 136 {
 137     Init();
 138     SetGraphicsContext( wxGraphicsContext::Create(dc) );
 139 }
 140
 141 #if wxUSE_PRINTING_ARCHITECTURE
 142 wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxPrinterDC& dc ) :
 143    wxDCImpl( owner )
 144 {
 145     Init();
 146     SetGraphicsContext( wxGraphicsContext::Create(dc) );
 147 }
 148 #endif
 149
 150 void wxGCDCImpl::Init()
 151 {
 152     m_ok = false;
 153     m_colour = true;
 154     m_mm_to_pix_x = mm2pt;
 155     m_mm_to_pix_y = mm2pt;
 156
 157     m_pen = *wxBLACK_PEN;
 158     m_font = *wxNORMAL_FONT;
 159     m_brush = *wxWHITE_BRUSH;
 160
 161     m_graphicContext = NULL;
 162     m_logicalFunctionSupported = true;
 163 }
 164
 165
 166 wxGCDCImpl::~wxGCDCImpl()
 167 {
 168     delete m_graphicContext;
 169 }
 170
 171 void wxGCDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool WXUNUSED(useMask) )
 172 {
 173     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid DC") );
 174     wxCHECK_RET( bmp.IsOk(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid bitmap") );
 175
 176     if ( bmp.GetDepth() == 1 )
 177     {
 178         m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
 179         m_graphicContext->SetBrush( wxBrush( m_textBackgroundColour , wxSOLID ) );
 180         m_graphicContext->DrawRectangle( x , y , bmp.GetWidth() , bmp.GetHeight() );
 181         m_graphicContext->SetBrush( wxBrush( m_textForegroundColour , wxSOLID ) );
 182         m_graphicContext->DrawBitmap( bmp, x , y , bmp.GetWidth() , bmp.GetHeight() );
 183         m_graphicContext->SetBrush( m_graphicContext->CreateBrush(m_brush));
 184         m_graphicContext->SetPen( m_graphicContext->CreatePen(m_pen));
 185     }
 186     else
 187         m_graphicContext->DrawBitmap( bmp, x , y , bmp.GetWidth() , bmp.GetHeight() );
 188 }
 189
 190 void wxGCDCImpl::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
 191 {
 192     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawIcon - invalid DC") );
 193     wxCHECK_RET( icon.IsOk(), wxT("wxGCDC(cg)::DoDrawIcon - invalid icon") );
 194
 195     wxCoord w = icon.GetWidth();
 196     wxCoord h = icon.GetHeight();
 197
 198     m_graphicContext->DrawIcon( icon , x, y, w, h );
 199 }
 200
 201 bool wxGCDCImpl::StartDoc( const wxString& WXUNUSED(message) )
 202 {
 203     return true;
 204 }
 205
 206 void wxGCDCImpl::EndDoc()
 207 {
 208 }
 209
 210 void wxGCDCImpl::StartPage()
 211 {
 212 }
 213
 214 void wxGCDCImpl::EndPage()
 215 {
 216 }
 217
 218 void wxGCDCImpl::Flush()
 219 {
 220 #ifdef __WXOSX__
 221     CGContextFlush( (CGContextRef) m_graphicContext->GetNativeContext() );
 222 #endif
 223 }
 224
 225 void wxGCDCImpl::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
 226 {
 227     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoSetClippingRegion - invalid DC") );
 228
 229     m_graphicContext->Clip( x, y, w, h );
 230     if ( m_clipping )
 231     {
 232         m_clipX1 = wxMax( m_clipX1, x );
 233         m_clipY1 = wxMax( m_clipY1, y );
 234         m_clipX2 = wxMin( m_clipX2, (x + w) );
 235         m_clipY2 = wxMin( m_clipY2, (y + h) );
 236     }
 237     else
 238     {
 239         m_clipping = true;
 240
 241         m_clipX1 = x;
 242         m_clipY1 = y;
 243         m_clipX2 = x + w;
 244         m_clipY2 = y + h;
 245     }
 246 }
 247
 248 void wxGCDCImpl::DoSetDeviceClippingRegion( const wxRegion &region )
 249 {
 250     // region is in device coordinates
 251     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoSetDeviceClippingRegion - invalid DC") );
 252
 253     if (region.Empty())
 254     {
 255         //DestroyClippingRegion();
 256         return;
 257     }
 258
 259     wxRegion logRegion( region );
 260     wxCoord x, y, w, h;
 261
 262     logRegion.Offset( DeviceToLogicalX(0), DeviceToLogicalY(0) );
 263     logRegion.GetBox( x, y, w, h );
 264
 265     m_graphicContext->Clip( logRegion );
 266     if ( m_clipping )
 267     {
 268         m_clipX1 = wxMax( m_clipX1, x );
 269         m_clipY1 = wxMax( m_clipY1, y );
 270         m_clipX2 = wxMin( m_clipX2, (x + w) );
 271         m_clipY2 = wxMin( m_clipY2, (y + h) );
 272     }
 273     else
 274     {
 275         m_clipping = true;
 276
 277         m_clipX1 = x;
 278         m_clipY1 = y;
 279         m_clipX2 = x + w;
 280         m_clipY2 = y + h;
 281     }
 282 }
 283
 284 void wxGCDCImpl::DestroyClippingRegion()
 285 {
 286     m_graphicContext->ResetClip();
 287     // currently the clip eg of a window extends to the area between the scrollbars
 288     // so we must explicitely make sure it only covers the area we want it to draw
 289     int width, height ;
 290     GetOwner()->GetSize( &width , &height ) ;
 291     m_graphicContext->Clip( DeviceToLogicalX(0) , DeviceToLogicalY(0) , DeviceToLogicalXRel(width), DeviceToLogicalYRel(height) );
 292
 293     m_graphicContext->SetPen( m_pen );
 294     m_graphicContext->SetBrush( m_brush );
 295
 296     m_clipping = false;
 297 }
 298
 299 void wxGCDCImpl::DoGetSizeMM( int* width, int* height ) const
 300 {
 301     int w = 0, h = 0;
 302
 303     GetOwner()->GetSize( &w, &h );
 304     if (width)
 305         *width = long( double(w) / (m_scaleX * m_mm_to_pix_x) );
 306     if (height)
 307         *height = long( double(h) / (m_scaleY * m_mm_to_pix_y) );
 308 }
 309
 310 void wxGCDCImpl::SetTextForeground( const wxColour &col )
 311 {
 312     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::SetTextForeground - invalid DC") );
 313
 314     if ( col != m_textForegroundColour )
 315     {
 316         m_textForegroundColour = col;
 317         m_graphicContext->SetFont( m_font, m_textForegroundColour );
 318     }
 319 }
 320
 321 void wxGCDCImpl::SetTextBackground( const wxColour &col )
 322 {
 323     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::SetTextBackground - invalid DC") );
 324
 325     m_textBackgroundColour = col;
 326 }
 327
 328 void wxGCDCImpl::SetMapMode( int mode )
 329 {
 330     switch (mode)
 331     {
 332     case wxMM_TWIPS:
 333         SetLogicalScale( twips2mm * m_mm_to_pix_x, twips2mm * m_mm_to_pix_y );
 334         break;
 335
 336     case wxMM_POINTS:
 337         SetLogicalScale( pt2mm * m_mm_to_pix_x, pt2mm * m_mm_to_pix_y );
 338         break;
 339
 340     case wxMM_METRIC:
 341         SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
 342         break;
 343
 344     case wxMM_LOMETRIC:
 345         SetLogicalScale( m_mm_to_pix_x / 10.0, m_mm_to_pix_y / 10.0 );
 346         break;
 347
 348     case wxMM_TEXT:
 349     default:
 350         SetLogicalScale( 1.0, 1.0 );
 351         break;
 352     }
 353
 354     ComputeScaleAndOrigin();
 355 }
 356
 357 wxSize wxGCDCImpl::GetPPI() const
 358 {
 359     return wxSize(72, 72);
 360 }
 361
 362 int wxGCDCImpl::GetDepth() const
 363 {
 364     return 32;
 365 }
 366
 367 void wxGCDCImpl::ComputeScaleAndOrigin()
 368 {
 369     wxDCImpl::ComputeScaleAndOrigin();
 370
 371     if ( m_graphicContext )
 372     {
 373         m_matrixCurrent = m_graphicContext->CreateMatrix();
 374
 375         // the logical origin sets the origin to have new coordinates
 376         m_matrixCurrent.Translate( m_deviceOriginX - m_logicalOriginX * m_signX * m_scaleX,
 377                                    m_deviceOriginY-m_logicalOriginY * m_signY * m_scaleY);
 378
 379         m_matrixCurrent.Scale( m_scaleX * m_signX, m_scaleY * m_signY );
 380
 381         m_graphicContext->SetTransform( m_matrixOriginal );
 382         m_graphicContext->ConcatTransform( m_matrixCurrent );
 383     }
 384 }
 385
 386 void wxGCDCImpl::SetPalette( const wxPalette& WXUNUSED(palette) )
 387 {
 388
 389 }
 390
 391 void wxGCDCImpl::SetBackgroundMode( int mode )
 392 {
 393     m_backgroundMode = mode;
 394 }
 395
 396 void wxGCDCImpl::SetFont( const wxFont &font )
 397 {
 398     m_font = font;
 399     if ( m_graphicContext )
 400     {
 401         wxFont f = font;
 402         if ( f.IsOk() )
 403             f.SetPointSize( /*LogicalToDeviceYRel*/(font.GetPointSize()));
 404         m_graphicContext->SetFont( f, m_textForegroundColour );
 405     }
 406 }
 407
 408 void wxGCDCImpl::SetPen( const wxPen &pen )
 409 {
 410     if ( m_pen == pen )
 411         return;
 412
 413     m_pen = pen;
 414     if ( m_graphicContext )
 415     {
 416         m_graphicContext->SetPen( m_pen );
 417     }
 418 }
 419
 420 void wxGCDCImpl::SetBrush( const wxBrush &brush )
 421 {
 422     if (m_brush == brush)
 423         return;
 424
 425     m_brush = brush;
 426     if ( m_graphicContext )
 427     {
 428         m_graphicContext->SetBrush( m_brush );
 429     }
 430 }
 431
 432 void wxGCDCImpl::SetBackground( const wxBrush &brush )
 433 {
 434     if (m_backgroundBrush == brush)
 435         return;
 436
 437     m_backgroundBrush = brush;
 438     if (!m_backgroundBrush.IsOk())
 439         return;
 440 }
 441
 442 void wxGCDCImpl::SetLogicalFunction( int function )
 443 {
 444     if (m_logicalFunction == function)
 445         return;
 446
 447     m_logicalFunction = function;
 448     if ( m_graphicContext->SetLogicalFunction( function ) )
 449         m_logicalFunctionSupported=true;
 450     else
 451         m_logicalFunctionSupported=false;
 452 }
 453
 454 bool wxGCDCImpl::DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 455                          const wxColour& WXUNUSED(col), int WXUNUSED(style))
 456 {
 457     return false;
 458 }
 459
 460 bool wxGCDCImpl::DoGetPixel( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxColour *WXUNUSED(col) ) const
 461 {
 462     //  wxCHECK_MSG( 0 , false, wxT("wxGCDC(cg)::DoGetPixel - not implemented") );
 463     return false;
 464 }
 465
 466 void wxGCDCImpl::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 467 {
 468     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLine - invalid DC") );
 469
 470     if ( !m_logicalFunctionSupported )
 471         return;
 472
 473     m_graphicContext->StrokeLine(x1,y1,x2,y2);
 474
 475     CalcBoundingBox(x1, y1);
 476     CalcBoundingBox(x2, y2);
 477 }
 478
 479 void wxGCDCImpl::DoCrossHair( wxCoord x, wxCoord y )
 480 {
 481     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoCrossHair - invalid DC") );
 482
 483     if ( !m_logicalFunctionSupported )
 484         return;
 485
 486     int w = 0, h = 0;
 487
 488     GetOwner()->GetSize( &w, &h );
 489
 490     m_graphicContext->StrokeLine(0,y,w,y);
 491     m_graphicContext->StrokeLine(x,0,x,h);
 492
 493     CalcBoundingBox(0, 0);
 494     CalcBoundingBox(0+w, 0+h);
 495 }
 496
 497 void wxGCDCImpl::DoDrawArc( wxCoord x1, wxCoord y1,
 498                         wxCoord x2, wxCoord y2,
 499                         wxCoord xc, wxCoord yc )
 500 {
 501     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawArc - invalid DC") );
 502
 503     if ( !m_logicalFunctionSupported )
 504         return;
 505
 506     double dx = x1 - xc;
 507     double dy = y1 - yc;
 508     double radius = sqrt((double)(dx * dx + dy * dy));
 509     wxCoord rad = (wxCoord)radius;
 510     double sa, ea;
 511     if (x1 == x2 && y1 == y2)
 512     {
 513         sa = 0.0;
 514         ea = 360.0;
 515     }
 516     else if (radius == 0.0)
 517     {
 518         sa = ea = 0.0;
 519     }
 520     else
 521     {
 522         sa = (x1 - xc == 0) ?
 523      (y1 - yc < 0) ? 90.0 : -90.0 :
 524              -atan2(double(y1 - yc), double(x1 - xc)) * RAD2DEG;
 525         ea = (x2 - xc == 0) ?
 526      (y2 - yc < 0) ? 90.0 : -90.0 :
 527              -atan2(double(y2 - yc), double(x2 - xc)) * RAD2DEG;
 528     }
 529
 530     bool fill = m_brush.GetStyle() != wxTRANSPARENT;
 531
 532     wxGraphicsPath path = m_graphicContext->CreatePath();
 533     if ( fill && ((x1!=x2)||(y1!=y2)) )
 534         path.MoveToPoint( xc, yc );
 535     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 536     // get clockwise angles
 537     path.AddArc( xc, yc , rad , DegToRad(-sa) , DegToRad(-ea), false );
 538     if ( fill && ((x1!=x2)||(y1!=y2)) )
 539         path.AddLineToPoint( xc, yc );
 540     m_graphicContext->DrawPath(path);
 541 }
 542
 543 void wxGCDCImpl::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 544                                 double sa, double ea )
 545 {
 546     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawEllipticArc - invalid DC") );
 547
 548     if ( !m_logicalFunctionSupported )
 549         return;
 550
 551     m_graphicContext->PushState();
 552     m_graphicContext->Translate(x+w/2.0,y+h/2.0);
 553     wxDouble factor = ((wxDouble) w) / h;
 554     m_graphicContext->Scale( factor , 1.0);
 555
 556     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 557     // get clockwise angles
 558     if ( m_brush.GetStyle() != wxTRANSPARENT )
 559     {
 560         wxGraphicsPath path = m_graphicContext->CreatePath();
 561         path.MoveToPoint( 0, 0 );
 562         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 563         path.AddLineToPoint( 0, 0 );
 564         m_graphicContext->FillPath( path );
 565
 566         path = m_graphicContext->CreatePath();
 567         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 568         m_graphicContext->StrokePath( path );
 569     }
 570     else
 571     {
 572         wxGraphicsPath path = m_graphicContext->CreatePath();
 573         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 574         m_graphicContext->DrawPath( path );
 575     }
 576
 577     m_graphicContext->PopState();
 578 }
 579
 580 void wxGCDCImpl::DoDrawPoint( wxCoord x, wxCoord y )
 581 {
 582     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawPoint - invalid DC") );
 583
 584     DoDrawLine( x , y , x + 1 , y + 1 );
 585 }
 586
 587 void wxGCDCImpl::DoDrawLines(int n, wxPoint points[],
 588                          wxCoord xoffset, wxCoord yoffset)
 589 {
 590     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLines - invalid DC") );
 591
 592     if ( !m_logicalFunctionSupported )
 593         return;
 594
 595     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n];
 596     for( int i = 0; i < n; ++i)
 597     {
 598         pointsD[i].m_x = points[i].x + xoffset;
 599         pointsD[i].m_y = points[i].y + yoffset;
 600     }
 601
 602     m_graphicContext->StrokeLines( n , pointsD);
 603     delete[] pointsD;
 604 }
 605
 606 #if wxUSE_SPLINES
 607 void wxGCDCImpl::DoDrawSpline(const wxPointList *points)
 608 {
 609     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawSpline - invalid DC") );
 610
 611     if ( !m_logicalFunctionSupported )
 612         return;
 613
 614     wxGraphicsPath path = m_graphicContext->CreatePath();
 615
 616     wxPointList::compatibility_iterator node = points->GetFirst();
 617     if (node == wxPointList::compatibility_iterator())
 618         // empty list
 619         return;
 620
 621     wxPoint *p = node->GetData();
 622
 623     wxCoord x1 = p->x;
 624     wxCoord y1 = p->y;
 625
 626     node = node->GetNext();
 627     p = node->GetData();
 628
 629     wxCoord x2 = p->x;
 630     wxCoord y2 = p->y;
 631     wxCoord cx1 = ( x1 + x2 ) / 2;
 632     wxCoord cy1 = ( y1 + y2 ) / 2;
 633
 634     path.MoveToPoint( x1 , y1 );
 635     path.AddLineToPoint( cx1 , cy1 );
 636 #if !wxUSE_STL
 637
 638     while ((node = node->GetNext()) != NULL)
 639 #else
 640
 641     while ((node = node->GetNext()))
 642 #endif // !wxUSE_STL
 643
 644     {
 645         p = node->GetData();
 646         x1 = x2;
 647         y1 = y2;
 648         x2 = p->x;
 649         y2 = p->y;
 650         wxCoord cx4 = (x1 + x2) / 2;
 651         wxCoord cy4 = (y1 + y2) / 2;
 652
 653         path.AddQuadCurveToPoint(x1 , y1 ,cx4 , cy4 );
 654
 655         cx1 = cx4;
 656         cy1 = cy4;
 657     }
 658
 659     path.AddLineToPoint( x2 , y2 );
 660
 661     m_graphicContext->StrokePath( path );
 662 }
 663 #endif // wxUSE_SPLINES
 664
 665 void wxGCDCImpl::DoDrawPolygon( int n, wxPoint points[],
 666                             wxCoord xoffset, wxCoord yoffset,
 667                             int fillStyle )
 668 {
 669     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawPolygon - invalid DC") );
 670
 671     if ( n <= 0 || (m_brush.GetStyle() == wxTRANSPARENT && m_pen.GetStyle() == wxTRANSPARENT ) )
 672         return;
 673     if ( !m_logicalFunctionSupported )
 674         return;
 675
 676     bool closeIt = false;
 677     if (points[n-1] != points[0])
 678         closeIt = true;
 679
 680     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n+(closeIt?1:0)];
 681     for( int i = 0; i < n; ++i)
 682     {
 683         pointsD[i].m_x = points[i].x + xoffset;
 684         pointsD[i].m_y = points[i].y + yoffset;
 685     }
 686     if ( closeIt )
 687         pointsD[n] = pointsD[0];
 688
 689     m_graphicContext->DrawLines( n+(closeIt?1:0) , pointsD, fillStyle);
 690     delete[] pointsD;
 691 }
 692
 693 void wxGCDCImpl::DoDrawPolyPolygon(int n,
 694                                int count[],
 695                                wxPoint points[],
 696                                wxCoord xoffset,
 697                                wxCoord yoffset,
 698                                int fillStyle)
 699 {
 700     wxASSERT(n > 1);
 701     wxGraphicsPath path = m_graphicContext->CreatePath();
 702
 703     int i = 0;
 704     for ( int j = 0; j < n; ++j)
 705     {
 706         wxPoint start = points[i];
 707         path.MoveToPoint( start.x+ xoffset, start.y+ yoffset);
 708         ++i;
 709         int l = count[j];
 710         for ( int k = 1; k < l; ++k)
 711         {
 712             path.AddLineToPoint( points[i].x+ xoffset, points[i].y+ yoffset);
 713             ++i;
 714         }
 715         // close the polygon
 716         if ( start != points[i-1])
 717             path.AddLineToPoint( start.x+ xoffset, start.y+ yoffset);
 718     }
 719     m_graphicContext->DrawPath( path , fillStyle);
 720 }
 721
 722 void wxGCDCImpl::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 723 {
 724     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRectangle - invalid DC") );
 725
 726     if ( !m_logicalFunctionSupported )
 727         return;
 728
 729     // CMB: draw nothing if transformed w or h is 0
 730     if (w == 0 || h == 0)
 731         return;
 732
 733     if ( m_graphicContext->ShouldOffset() )
 734     {
 735         // if we are offsetting the entire rectangle is moved 0.5, so the
 736         // border line gets off by 1
 737         w -= 1;
 738         h -= 1;
 739     }
 740     m_graphicContext->DrawRectangle(x,y,w,h);
 741 }
 742
 743 void wxGCDCImpl::DoDrawRoundedRectangle(wxCoord x, wxCoord y,
 744                                     wxCoord w, wxCoord h,
 745                                     double radius)
 746 {
 747     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRoundedRectangle - invalid DC") );
 748
 749     if ( !m_logicalFunctionSupported )
 750         return;
 751
 752     if (radius < 0.0)
 753         radius = - radius * ((w < h) ? w : h);
 754
 755     // CMB: draw nothing if transformed w or h is 0
 756     if (w == 0 || h == 0)
 757         return;
 758
 759     if ( m_graphicContext->ShouldOffset() )
 760     {
 761         // if we are offsetting the entire rectangle is moved 0.5, so the
 762         // border line gets off by 1
 763         w -= 1;
 764         h -= 1;
 765     }
 766     m_graphicContext->DrawRoundedRectangle( x,y,w,h,radius);
 767 }
 768
 769 void wxGCDCImpl::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 770 {
 771     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawEllipse - invalid DC") );
 772
 773     if ( !m_logicalFunctionSupported )
 774         return;
 775
 776     if ( m_graphicContext->ShouldOffset() )
 777     {
 778         // if we are offsetting the entire rectangle is moved 0.5, so the
 779         // border line gets off by 1
 780         w -= 1;
 781         h -= 1;
 782     }
 783     m_graphicContext->DrawEllipse(x,y,w,h);
 784 }
 785
 786 bool wxGCDCImpl::CanDrawBitmap() const
 787 {
 788     return true;
 789 }
 790
 791 bool wxGCDCImpl::DoBlit(
 792     wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 793     wxDC *source, wxCoord xsrc, wxCoord ysrc, int logical_func , bool useMask,
 794     wxCoord xsrcMask, wxCoord ysrcMask )
 795 {
 796     return DoStretchBlit( xdest, ydest, width, height,
 797         source, xsrc, ysrc, width, height, logical_func, useMask,
 798         xsrcMask,ysrcMask );
 799 }
 800
 801 bool wxGCDCImpl::DoStretchBlit(
 802     wxCoord xdest, wxCoord ydest, wxCoord dstWidth, wxCoord dstHeight,
 803     wxDC *source, wxCoord xsrc, wxCoord ysrc, wxCoord srcWidth, wxCoord srcHeight,
 804     int logical_func , bool WXUNUSED(useMask),
 805     wxCoord xsrcMask, wxCoord ysrcMask )
 806 {
 807     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid DC") );
 808     wxCHECK_MSG( source->IsOk(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid source DC") );
 809
 810     if ( logical_func == wxNO_OP )
 811         return true;
 812     else if ( !m_graphicContext->SetLogicalFunction( logical_func ) )
 813
 814     {
 815         wxFAIL_MSG( wxT("Blitting is only supported with wxCOPY logical operation.") );
 816         return false;
 817     }
 818
 819     if (xsrcMask == -1 && ysrcMask == -1)
 820     {
 821         xsrcMask = xsrc;
 822         ysrcMask = ysrc;
 823     }
 824
 825     wxRect subrect(source->LogicalToDeviceX(xsrc),
 826                    source->LogicalToDeviceY(ysrc),
 827                    source->LogicalToDeviceXRel(srcWidth),
 828                    source->LogicalToDeviceYRel(srcHeight));
 829
 830     // if needed clip the subrect down to the size of the source DC
 831     wxCoord sw, sh;
 832     source->GetSize(&sw, &sh);
 833     sw = source->LogicalToDeviceXRel(sw);
 834     sh = source->LogicalToDeviceYRel(sh);
 835     if (subrect.x + subrect.width > sw)
 836         subrect.width = sw - subrect.x;
 837     if (subrect.y + subrect.height > sh)
 838         subrect.height = sh - subrect.y;
 839
 840     wxBitmap blit = source->GetAsBitmap( &subrect );
 841
 842     if ( blit.IsOk() )
 843     {
 844         m_graphicContext->DrawBitmap( blit, xdest, ydest,
 845                                       dstWidth, dstHeight);
 846     }
 847     else
 848     {
 849         wxFAIL_MSG( wxT("Cannot Blit. Unable to get contents of DC as bitmap.") );
 850         return false;
 851     }
 852
 853     // reset logical function
 854     m_graphicContext->SetLogicalFunction( m_logicalFunction );
 855
 856     return true;
 857 }
 858
 859 void wxGCDCImpl::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
 860                                double angle)
 861 {
 862     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
 863
 864     if ( str.length() == 0 )
 865         return;
 866     if ( !m_logicalFunctionSupported )
 867         return;
 868
 869     if ( m_backgroundMode == wxTRANSPARENT )
 870         m_graphicContext->DrawText( str, x ,y , DegToRad(angle ));
 871     else
 872         m_graphicContext->DrawText( str, x ,y , DegToRad(angle ), m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 873 }
 874
 875 void wxGCDCImpl::DoDrawText(const wxString& str, wxCoord x, wxCoord y)
 876 {
 877     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
 878
 879     if ( str.length() == 0 )
 880         return;
 881
 882     if ( !m_logicalFunctionSupported )
 883         return;
 884
 885     if ( m_backgroundMode == wxTRANSPARENT )
 886         m_graphicContext->DrawText( str, x ,y);
 887     else
 888         m_graphicContext->DrawText( str, x ,y , m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 889 }
 890
 891 bool wxGCDCImpl::CanGetTextExtent() const
 892 {
 893     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::CanGetTextExtent - invalid DC") );
 894
 895     return true;
 896 }
 897
 898 void wxGCDCImpl::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
 899                               wxCoord *descent, wxCoord *externalLeading ,
 900                               const wxFont *theFont ) const
 901 {
 902     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );
 903
 904     if ( theFont )
 905     {
 906         m_graphicContext->SetFont( *theFont, m_textForegroundColour );
 907     }
 908
 909     wxDouble h , d , e , w;
 910
 911     m_graphicContext->GetTextExtent( str, &w, &h, &d, &e );
 912
 913     if ( height )
 914         *height = (wxCoord)(h+0.5);
 915     if ( descent )
 916         *descent = (wxCoord)(d+0.5);
 917     if ( externalLeading )
 918         *externalLeading = (wxCoord)(e+0.5);
 919     if ( width )
 920         *width = (wxCoord)(w+0.5);
 921
 922     if ( theFont )
 923     {
 924         m_graphicContext->SetFont( m_font, m_textForegroundColour );
 925     }
 926 }
 927
 928 bool wxGCDCImpl::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
 929 {
 930     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::DoGetPartialTextExtents - invalid DC") );
 931     widths.Clear();
 932     widths.Add(0,text.Length());
 933     if ( text.IsEmpty() )
 934         return true;
 935
 936     wxArrayDouble widthsD;
 937
 938     m_graphicContext->GetPartialTextExtents( text, widthsD );
 939     for ( size_t i = 0; i < widths.GetCount(); ++i )
 940         widths[i] = (wxCoord)(widthsD[i] + 0.5);
 941
 942     return true;
 943 }
 944
 945 wxCoord wxGCDCImpl::GetCharWidth(void) const
 946 {
 947     wxCoord width;
 948     DoGetTextExtent( wxT("g") , &width , NULL , NULL , NULL , NULL );
 949
 950     return width;
 951 }
 952
 953 wxCoord wxGCDCImpl::GetCharHeight(void) const
 954 {
 955     wxCoord height;
 956     DoGetTextExtent( wxT("g") , NULL , &height , NULL , NULL , NULL );
 957
 958     return height;
 959 }
 960
 961 void wxGCDCImpl::Clear(void)
 962 {
 963     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::Clear - invalid DC") );
 964     // TODO better implementation / incorporate size info into wxGCDC or context
 965     m_graphicContext->SetBrush( m_backgroundBrush );
 966     wxPen p = *wxTRANSPARENT_PEN;
 967     m_graphicContext->SetPen( p );
 968     DoDrawRectangle( 0, 0, 32000 , 32000 );
 969     m_graphicContext->SetPen( m_pen );
 970     m_graphicContext->SetBrush( m_brush );
 971 }
 972
 973 void wxGCDCImpl::DoGetSize(int *width, int *height) const
 974 {
 975     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoGetSize - invalid DC") );
 976     wxDouble w,h;
 977     m_graphicContext->GetSize( &w, &h );
 978     if ( height )
 979         *height = (int) (h+0.5);
 980     if ( width )
 981         *width = (int) (w+0.5);
 982 }
 983
 984 void wxGCDCImpl::DoGradientFillLinear(const wxRect& rect,
 985                                   const wxColour& initialColour,
 986                                   const wxColour& destColour,
 987                                   wxDirection nDirection )
 988 {
 989     wxPoint start;
 990     wxPoint end;
 991     switch( nDirection)
 992     {
 993     case wxWEST :
 994         start = rect.GetRightBottom();
 995         start.x++;
 996         end = rect.GetLeftBottom();
 997         break;
 998     case wxEAST :
 999         start = rect.GetLeftBottom();
1000         end = rect.GetRightBottom();
1001         end.x++;
1002         break;
1003     case wxNORTH :
1004         start = rect.GetLeftBottom();
1005         start.y++;
1006         end = rect.GetLeftTop();
1007         break;
1008     case wxSOUTH :
1009         start = rect.GetLeftTop();
1010         end = rect.GetLeftBottom();
1011         end.y++;
1012         break;
1013     default :
1014         break;
1015     }
1016
1017     if (rect.width == 0 || rect.height == 0)
1018         return;
1019
1020     m_graphicContext->SetBrush( m_graphicContext->CreateLinearGradientBrush(
1021         start.x,start.y,end.x,end.y, initialColour, destColour));
1022     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1023     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1024     m_graphicContext->SetPen(m_pen);
1025 }
1026
1027 void wxGCDCImpl::DoGradientFillConcentric(const wxRect& rect,
1028                                       const wxColour& initialColour,
1029                                       const wxColour& destColour,
1030                                       const wxPoint& circleCenter)
1031 {
1032     //Radius
1033     wxInt32 cx = rect.GetWidth() / 2;
1034     wxInt32 cy = rect.GetHeight() / 2;
1035     wxInt32 nRadius;
1036     if (cx < cy)
1037         nRadius = cx;
1038     else
1039         nRadius = cy;
1040
1041     // make sure the background is filled (todo move into specific platform implementation ?)
1042     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1043     m_graphicContext->SetBrush( wxBrush( destColour) );
1044     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1045
1046     m_graphicContext->SetBrush( m_graphicContext->CreateRadialGradientBrush(
1047         rect.x+circleCenter.x,rect.y+circleCenter.y,
1048         rect.x+circleCenter.x,rect.y+circleCenter.y,
1049         nRadius,initialColour,destColour));
1050
1051     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1052     m_graphicContext->SetPen(m_pen);
1053 }
1054
1055 void wxGCDCImpl::DoDrawCheckMark(wxCoord x, wxCoord y,
1056                              wxCoord width, wxCoord height)
1057 {
1058     wxDCImpl::DoDrawCheckMark(x,y,width,height);
1059 }
1060
1061 #endif // wxUSE_GRAPHICS_CONTEXT