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,
 172                                bool useMask )
 173 {
 174     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid DC") );
 175     wxCHECK_RET( bmp.IsOk(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid bitmap") );
 176
 177     int w = bmp.GetWidth();
 178     int h = bmp.GetHeight();
 179     if ( bmp.GetDepth() == 1 )
 180     {
 181         m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
 182         m_graphicContext->SetBrush( wxBrush( m_textBackgroundColour , wxSOLID ) );
 183         m_graphicContext->DrawRectangle( x, y, w, h );
 184         m_graphicContext->SetBrush( wxBrush( m_textForegroundColour , wxSOLID ) );
 185         m_graphicContext->DrawBitmap( bmp, x, y, w, h );
 186         m_graphicContext->SetBrush( m_graphicContext->CreateBrush(m_brush));
 187         m_graphicContext->SetPen( m_graphicContext->CreatePen(m_pen));
 188     }
 189     else // not a monochrome bitmap, handle it normally
 190     {
 191         // make a copy in case we need to remove its mask, if we don't modify
 192         // it the copy is cheap as bitmaps are reference-counted
 193         wxBitmap bmpCopy(bmp);
 194         if ( !useMask && bmp.GetMask() )
 195             bmpCopy.SetMask(NULL);
 196
 197         m_graphicContext->DrawBitmap( bmpCopy, x, y, w, h );
 198     }
 199 }
 200
 201 void wxGCDCImpl::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
 202 {
 203     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawIcon - invalid DC") );
 204     wxCHECK_RET( icon.IsOk(), wxT("wxGCDC(cg)::DoDrawIcon - invalid icon") );
 205
 206     wxCoord w = icon.GetWidth();
 207     wxCoord h = icon.GetHeight();
 208
 209     m_graphicContext->DrawIcon( icon , x, y, w, h );
 210 }
 211
 212 bool wxGCDCImpl::StartDoc( const wxString& WXUNUSED(message) )
 213 {
 214     return true;
 215 }
 216
 217 void wxGCDCImpl::EndDoc()
 218 {
 219 }
 220
 221 void wxGCDCImpl::StartPage()
 222 {
 223 }
 224
 225 void wxGCDCImpl::EndPage()
 226 {
 227 }
 228
 229 void wxGCDCImpl::Flush()
 230 {
 231 #ifdef __WXOSX__
 232     CGContextFlush( (CGContextRef) m_graphicContext->GetNativeContext() );
 233 #endif
 234 }
 235
 236 void wxGCDCImpl::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
 237 {
 238     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoSetClippingRegion - invalid DC") );
 239
 240     m_graphicContext->Clip( x, y, w, h );
 241     if ( m_clipping )
 242     {
 243         m_clipX1 = wxMax( m_clipX1, x );
 244         m_clipY1 = wxMax( m_clipY1, y );
 245         m_clipX2 = wxMin( m_clipX2, (x + w) );
 246         m_clipY2 = wxMin( m_clipY2, (y + h) );
 247     }
 248     else
 249     {
 250         m_clipping = true;
 251
 252         m_clipX1 = x;
 253         m_clipY1 = y;
 254         m_clipX2 = x + w;
 255         m_clipY2 = y + h;
 256     }
 257 }
 258
 259 void wxGCDCImpl::DoSetDeviceClippingRegion( const wxRegion &region )
 260 {
 261     // region is in device coordinates
 262     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoSetDeviceClippingRegion - invalid DC") );
 263
 264     if (region.Empty())
 265     {
 266         //DestroyClippingRegion();
 267         return;
 268     }
 269
 270     wxRegion logRegion( region );
 271     wxCoord x, y, w, h;
 272
 273     logRegion.Offset( DeviceToLogicalX(0), DeviceToLogicalY(0) );
 274     logRegion.GetBox( x, y, w, h );
 275
 276     m_graphicContext->Clip( logRegion );
 277     if ( m_clipping )
 278     {
 279         m_clipX1 = wxMax( m_clipX1, x );
 280         m_clipY1 = wxMax( m_clipY1, y );
 281         m_clipX2 = wxMin( m_clipX2, (x + w) );
 282         m_clipY2 = wxMin( m_clipY2, (y + h) );
 283     }
 284     else
 285     {
 286         m_clipping = true;
 287
 288         m_clipX1 = x;
 289         m_clipY1 = y;
 290         m_clipX2 = x + w;
 291         m_clipY2 = y + h;
 292     }
 293 }
 294
 295 void wxGCDCImpl::DestroyClippingRegion()
 296 {
 297     m_graphicContext->ResetClip();
 298     // currently the clip eg of a window extends to the area between the scrollbars
 299     // so we must explicitely make sure it only covers the area we want it to draw
 300     int width, height ;
 301     GetOwner()->GetSize( &width , &height ) ;
 302     m_graphicContext->Clip( DeviceToLogicalX(0) , DeviceToLogicalY(0) , DeviceToLogicalXRel(width), DeviceToLogicalYRel(height) );
 303
 304     m_graphicContext->SetPen( m_pen );
 305     m_graphicContext->SetBrush( m_brush );
 306
 307     m_clipping = false;
 308 }
 309
 310 void wxGCDCImpl::DoGetSizeMM( int* width, int* height ) const
 311 {
 312     int w = 0, h = 0;
 313
 314     GetOwner()->GetSize( &w, &h );
 315     if (width)
 316         *width = long( double(w) / (m_scaleX * m_mm_to_pix_x) );
 317     if (height)
 318         *height = long( double(h) / (m_scaleY * m_mm_to_pix_y) );
 319 }
 320
 321 void wxGCDCImpl::SetTextForeground( const wxColour &col )
 322 {
 323     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::SetTextForeground - invalid DC") );
 324
 325     if ( col != m_textForegroundColour )
 326     {
 327         m_textForegroundColour = col;
 328         m_graphicContext->SetFont( m_font, m_textForegroundColour );
 329     }
 330 }
 331
 332 void wxGCDCImpl::SetTextBackground( const wxColour &col )
 333 {
 334     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::SetTextBackground - invalid DC") );
 335
 336     m_textBackgroundColour = col;
 337 }
 338
 339 void wxGCDCImpl::SetMapMode( int mode )
 340 {
 341     switch (mode)
 342     {
 343     case wxMM_TWIPS:
 344         SetLogicalScale( twips2mm * m_mm_to_pix_x, twips2mm * m_mm_to_pix_y );
 345         break;
 346
 347     case wxMM_POINTS:
 348         SetLogicalScale( pt2mm * m_mm_to_pix_x, pt2mm * m_mm_to_pix_y );
 349         break;
 350
 351     case wxMM_METRIC:
 352         SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
 353         break;
 354
 355     case wxMM_LOMETRIC:
 356         SetLogicalScale( m_mm_to_pix_x / 10.0, m_mm_to_pix_y / 10.0 );
 357         break;
 358
 359     case wxMM_TEXT:
 360     default:
 361         SetLogicalScale( 1.0, 1.0 );
 362         break;
 363     }
 364
 365     ComputeScaleAndOrigin();
 366 }
 367
 368 wxSize wxGCDCImpl::GetPPI() const
 369 {
 370     return wxSize(72, 72);
 371 }
 372
 373 int wxGCDCImpl::GetDepth() const
 374 {
 375     return 32;
 376 }
 377
 378 void wxGCDCImpl::ComputeScaleAndOrigin()
 379 {
 380     wxDCImpl::ComputeScaleAndOrigin();
 381
 382     if ( m_graphicContext )
 383     {
 384         m_matrixCurrent = m_graphicContext->CreateMatrix();
 385
 386         // the logical origin sets the origin to have new coordinates
 387         m_matrixCurrent.Translate( m_deviceOriginX - m_logicalOriginX * m_signX * m_scaleX,
 388                                    m_deviceOriginY-m_logicalOriginY * m_signY * m_scaleY);
 389
 390         m_matrixCurrent.Scale( m_scaleX * m_signX, m_scaleY * m_signY );
 391
 392         m_graphicContext->SetTransform( m_matrixOriginal );
 393         m_graphicContext->ConcatTransform( m_matrixCurrent );
 394     }
 395 }
 396
 397 void wxGCDCImpl::SetPalette( const wxPalette& WXUNUSED(palette) )
 398 {
 399
 400 }
 401
 402 void wxGCDCImpl::SetBackgroundMode( int mode )
 403 {
 404     m_backgroundMode = mode;
 405 }
 406
 407 void wxGCDCImpl::SetFont( const wxFont &font )
 408 {
 409     m_font = font;
 410     if ( m_graphicContext )
 411     {
 412         wxFont f = font;
 413         if ( f.IsOk() )
 414             f.SetPointSize( /*LogicalToDeviceYRel*/(font.GetPointSize()));
 415         m_graphicContext->SetFont( f, m_textForegroundColour );
 416     }
 417 }
 418
 419 void wxGCDCImpl::SetPen( const wxPen &pen )
 420 {
 421     if ( m_pen == pen )
 422         return;
 423
 424     m_pen = pen;
 425     if ( m_graphicContext )
 426     {
 427         m_graphicContext->SetPen( m_pen );
 428     }
 429 }
 430
 431 void wxGCDCImpl::SetBrush( const wxBrush &brush )
 432 {
 433     if (m_brush == brush)
 434         return;
 435
 436     m_brush = brush;
 437     if ( m_graphicContext )
 438     {
 439         m_graphicContext->SetBrush( m_brush );
 440     }
 441 }
 442
 443 void wxGCDCImpl::SetBackground( const wxBrush &brush )
 444 {
 445     if (m_backgroundBrush == brush)
 446         return;
 447
 448     m_backgroundBrush = brush;
 449     if (!m_backgroundBrush.IsOk())
 450         return;
 451 }
 452
 453 void wxGCDCImpl::SetLogicalFunction( int function )
 454 {
 455     if (m_logicalFunction == function)
 456         return;
 457
 458     m_logicalFunction = function;
 459     if ( m_graphicContext->SetLogicalFunction( function ) )
 460         m_logicalFunctionSupported=true;
 461     else
 462         m_logicalFunctionSupported=false;
 463 }
 464
 465 bool wxGCDCImpl::DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 466                          const wxColour& WXUNUSED(col), int WXUNUSED(style))
 467 {
 468     return false;
 469 }
 470
 471 bool wxGCDCImpl::DoGetPixel( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxColour *WXUNUSED(col) ) const
 472 {
 473     //  wxCHECK_MSG( 0 , false, wxT("wxGCDC(cg)::DoGetPixel - not implemented") );
 474     return false;
 475 }
 476
 477 void wxGCDCImpl::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 478 {
 479     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLine - invalid DC") );
 480
 481     if ( !m_logicalFunctionSupported )
 482         return;
 483
 484     m_graphicContext->StrokeLine(x1,y1,x2,y2);
 485
 486     CalcBoundingBox(x1, y1);
 487     CalcBoundingBox(x2, y2);
 488 }
 489
 490 void wxGCDCImpl::DoCrossHair( wxCoord x, wxCoord y )
 491 {
 492     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoCrossHair - invalid DC") );
 493
 494     if ( !m_logicalFunctionSupported )
 495         return;
 496
 497     int w = 0, h = 0;
 498
 499     GetOwner()->GetSize( &w, &h );
 500
 501     m_graphicContext->StrokeLine(0,y,w,y);
 502     m_graphicContext->StrokeLine(x,0,x,h);
 503
 504     CalcBoundingBox(0, 0);
 505     CalcBoundingBox(0+w, 0+h);
 506 }
 507
 508 void wxGCDCImpl::DoDrawArc( wxCoord x1, wxCoord y1,
 509                         wxCoord x2, wxCoord y2,
 510                         wxCoord xc, wxCoord yc )
 511 {
 512     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawArc - invalid DC") );
 513
 514     if ( !m_logicalFunctionSupported )
 515         return;
 516
 517     double dx = x1 - xc;
 518     double dy = y1 - yc;
 519     double radius = sqrt((double)(dx * dx + dy * dy));
 520     wxCoord rad = (wxCoord)radius;
 521     double sa, ea;
 522     if (x1 == x2 && y1 == y2)
 523     {
 524         sa = 0.0;
 525         ea = 360.0;
 526     }
 527     else if (radius == 0.0)
 528     {
 529         sa = ea = 0.0;
 530     }
 531     else
 532     {
 533         sa = (x1 - xc == 0) ?
 534      (y1 - yc < 0) ? 90.0 : -90.0 :
 535              -atan2(double(y1 - yc), double(x1 - xc)) * RAD2DEG;
 536         ea = (x2 - xc == 0) ?
 537      (y2 - yc < 0) ? 90.0 : -90.0 :
 538              -atan2(double(y2 - yc), double(x2 - xc)) * RAD2DEG;
 539     }
 540
 541     bool fill = m_brush.GetStyle() != wxTRANSPARENT;
 542
 543     wxGraphicsPath path = m_graphicContext->CreatePath();
 544     if ( fill && ((x1!=x2)||(y1!=y2)) )
 545         path.MoveToPoint( xc, yc );
 546     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 547     // get clockwise angles
 548     path.AddArc( xc, yc , rad , DegToRad(-sa) , DegToRad(-ea), false );
 549     if ( fill && ((x1!=x2)||(y1!=y2)) )
 550         path.AddLineToPoint( xc, yc );
 551     m_graphicContext->DrawPath(path);
 552 }
 553
 554 void wxGCDCImpl::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 555                                 double sa, double ea )
 556 {
 557     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawEllipticArc - invalid DC") );
 558
 559     if ( !m_logicalFunctionSupported )
 560         return;
 561
 562     m_graphicContext->PushState();
 563     m_graphicContext->Translate(x+w/2.0,y+h/2.0);
 564     wxDouble factor = ((wxDouble) w) / h;
 565     m_graphicContext->Scale( factor , 1.0);
 566
 567     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 568     // get clockwise angles
 569     if ( m_brush.GetStyle() != wxTRANSPARENT )
 570     {
 571         wxGraphicsPath path = m_graphicContext->CreatePath();
 572         path.MoveToPoint( 0, 0 );
 573         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 574         path.AddLineToPoint( 0, 0 );
 575         m_graphicContext->FillPath( path );
 576
 577         path = m_graphicContext->CreatePath();
 578         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 579         m_graphicContext->StrokePath( path );
 580     }
 581     else
 582     {
 583         wxGraphicsPath path = m_graphicContext->CreatePath();
 584         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 585         m_graphicContext->DrawPath( path );
 586     }
 587
 588     m_graphicContext->PopState();
 589 }
 590
 591 void wxGCDCImpl::DoDrawPoint( wxCoord x, wxCoord y )
 592 {
 593     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawPoint - invalid DC") );
 594
 595     DoDrawLine( x , y , x + 1 , y + 1 );
 596 }
 597
 598 void wxGCDCImpl::DoDrawLines(int n, wxPoint points[],
 599                          wxCoord xoffset, wxCoord yoffset)
 600 {
 601     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLines - invalid DC") );
 602
 603     if ( !m_logicalFunctionSupported )
 604         return;
 605
 606     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n];
 607     for( int i = 0; i < n; ++i)
 608     {
 609         pointsD[i].m_x = points[i].x + xoffset;
 610         pointsD[i].m_y = points[i].y + yoffset;
 611     }
 612
 613     m_graphicContext->StrokeLines( n , pointsD);
 614     delete[] pointsD;
 615 }
 616
 617 #if wxUSE_SPLINES
 618 void wxGCDCImpl::DoDrawSpline(const wxPointList *points)
 619 {
 620     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawSpline - invalid DC") );
 621
 622     if ( !m_logicalFunctionSupported )
 623         return;
 624
 625     wxGraphicsPath path = m_graphicContext->CreatePath();
 626
 627     wxPointList::compatibility_iterator node = points->GetFirst();
 628     if (node == wxPointList::compatibility_iterator())
 629         // empty list
 630         return;
 631
 632     wxPoint *p = node->GetData();
 633
 634     wxCoord x1 = p->x;
 635     wxCoord y1 = p->y;
 636
 637     node = node->GetNext();
 638     p = node->GetData();
 639
 640     wxCoord x2 = p->x;
 641     wxCoord y2 = p->y;
 642     wxCoord cx1 = ( x1 + x2 ) / 2;
 643     wxCoord cy1 = ( y1 + y2 ) / 2;
 644
 645     path.MoveToPoint( x1 , y1 );
 646     path.AddLineToPoint( cx1 , cy1 );
 647 #if !wxUSE_STL
 648
 649     while ((node = node->GetNext()) != NULL)
 650 #else
 651
 652     while ((node = node->GetNext()))
 653 #endif // !wxUSE_STL
 654
 655     {
 656         p = node->GetData();
 657         x1 = x2;
 658         y1 = y2;
 659         x2 = p->x;
 660         y2 = p->y;
 661         wxCoord cx4 = (x1 + x2) / 2;
 662         wxCoord cy4 = (y1 + y2) / 2;
 663
 664         path.AddQuadCurveToPoint(x1 , y1 ,cx4 , cy4 );
 665
 666         cx1 = cx4;
 667         cy1 = cy4;
 668     }
 669
 670     path.AddLineToPoint( x2 , y2 );
 671
 672     m_graphicContext->StrokePath( path );
 673 }
 674 #endif // wxUSE_SPLINES
 675
 676 void wxGCDCImpl::DoDrawPolygon( int n, wxPoint points[],
 677                             wxCoord xoffset, wxCoord yoffset,
 678                             int fillStyle )
 679 {
 680     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawPolygon - invalid DC") );
 681
 682     if ( n <= 0 || (m_brush.GetStyle() == wxTRANSPARENT && m_pen.GetStyle() == wxTRANSPARENT ) )
 683         return;
 684     if ( !m_logicalFunctionSupported )
 685         return;
 686
 687     bool closeIt = false;
 688     if (points[n-1] != points[0])
 689         closeIt = true;
 690
 691     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n+(closeIt?1:0)];
 692     for( int i = 0; i < n; ++i)
 693     {
 694         pointsD[i].m_x = points[i].x + xoffset;
 695         pointsD[i].m_y = points[i].y + yoffset;
 696     }
 697     if ( closeIt )
 698         pointsD[n] = pointsD[0];
 699
 700     m_graphicContext->DrawLines( n+(closeIt?1:0) , pointsD, fillStyle);
 701     delete[] pointsD;
 702 }
 703
 704 void wxGCDCImpl::DoDrawPolyPolygon(int n,
 705                                int count[],
 706                                wxPoint points[],
 707                                wxCoord xoffset,
 708                                wxCoord yoffset,
 709                                int fillStyle)
 710 {
 711     wxASSERT(n > 1);
 712     wxGraphicsPath path = m_graphicContext->CreatePath();
 713
 714     int i = 0;
 715     for ( int j = 0; j < n; ++j)
 716     {
 717         wxPoint start = points[i];
 718         path.MoveToPoint( start.x+ xoffset, start.y+ yoffset);
 719         ++i;
 720         int l = count[j];
 721         for ( int k = 1; k < l; ++k)
 722         {
 723             path.AddLineToPoint( points[i].x+ xoffset, points[i].y+ yoffset);
 724             ++i;
 725         }
 726         // close the polygon
 727         if ( start != points[i-1])
 728             path.AddLineToPoint( start.x+ xoffset, start.y+ yoffset);
 729     }
 730     m_graphicContext->DrawPath( path , fillStyle);
 731 }
 732
 733 void wxGCDCImpl::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 734 {
 735     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRectangle - invalid DC") );
 736
 737     if ( !m_logicalFunctionSupported )
 738         return;
 739
 740     // CMB: draw nothing if transformed w or h is 0
 741     if (w == 0 || h == 0)
 742         return;
 743
 744     if ( m_graphicContext->ShouldOffset() )
 745     {
 746         // if we are offsetting the entire rectangle is moved 0.5, so the
 747         // border line gets off by 1
 748         w -= 1;
 749         h -= 1;
 750     }
 751     m_graphicContext->DrawRectangle(x,y,w,h);
 752 }
 753
 754 void wxGCDCImpl::DoDrawRoundedRectangle(wxCoord x, wxCoord y,
 755                                     wxCoord w, wxCoord h,
 756                                     double radius)
 757 {
 758     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRoundedRectangle - invalid DC") );
 759
 760     if ( !m_logicalFunctionSupported )
 761         return;
 762
 763     if (radius < 0.0)
 764         radius = - radius * ((w < h) ? w : h);
 765
 766     // CMB: draw nothing if transformed w or h is 0
 767     if (w == 0 || h == 0)
 768         return;
 769
 770     if ( m_graphicContext->ShouldOffset() )
 771     {
 772         // if we are offsetting the entire rectangle is moved 0.5, so the
 773         // border line gets off by 1
 774         w -= 1;
 775         h -= 1;
 776     }
 777     m_graphicContext->DrawRoundedRectangle( x,y,w,h,radius);
 778 }
 779
 780 void wxGCDCImpl::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 781 {
 782     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawEllipse - invalid DC") );
 783
 784     if ( !m_logicalFunctionSupported )
 785         return;
 786
 787     if ( m_graphicContext->ShouldOffset() )
 788     {
 789         // if we are offsetting the entire rectangle is moved 0.5, so the
 790         // border line gets off by 1
 791         w -= 1;
 792         h -= 1;
 793     }
 794     m_graphicContext->DrawEllipse(x,y,w,h);
 795 }
 796
 797 bool wxGCDCImpl::CanDrawBitmap() const
 798 {
 799     return true;
 800 }
 801
 802 bool wxGCDCImpl::DoBlit(
 803     wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 804     wxDC *source, wxCoord xsrc, wxCoord ysrc, int logical_func , bool useMask,
 805     wxCoord xsrcMask, wxCoord ysrcMask )
 806 {
 807     return DoStretchBlit( xdest, ydest, width, height,
 808         source, xsrc, ysrc, width, height, logical_func, useMask,
 809         xsrcMask,ysrcMask );
 810 }
 811
 812 bool wxGCDCImpl::DoStretchBlit(
 813     wxCoord xdest, wxCoord ydest, wxCoord dstWidth, wxCoord dstHeight,
 814     wxDC *source, wxCoord xsrc, wxCoord ysrc, wxCoord srcWidth, wxCoord srcHeight,
 815     int logical_func , bool useMask,
 816     wxCoord xsrcMask, wxCoord ysrcMask )
 817 {
 818     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid DC") );
 819     wxCHECK_MSG( source->IsOk(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid source DC") );
 820
 821     if ( logical_func == wxNO_OP )
 822         return true;
 823     else if ( !m_graphicContext->SetLogicalFunction( logical_func ) )
 824     {
 825         wxFAIL_MSG( wxT("Blitting is only supported with wxCOPY logical operation.") );
 826         return false;
 827     }
 828
 829     if (xsrcMask == -1 && ysrcMask == -1)
 830     {
 831         xsrcMask = xsrc;
 832         ysrcMask = ysrc;
 833     }
 834
 835     wxRect subrect(source->LogicalToDeviceX(xsrc),
 836                    source->LogicalToDeviceY(ysrc),
 837                    source->LogicalToDeviceXRel(srcWidth),
 838                    source->LogicalToDeviceYRel(srcHeight));
 839
 840     // if needed clip the subrect down to the size of the source DC
 841     wxCoord sw, sh;
 842     source->GetSize(&sw, &sh);
 843     sw = source->LogicalToDeviceXRel(sw);
 844     sh = source->LogicalToDeviceYRel(sh);
 845     if (subrect.x + subrect.width > sw)
 846         subrect.width = sw - subrect.x;
 847     if (subrect.y + subrect.height > sh)
 848         subrect.height = sh - subrect.y;
 849
 850     wxBitmap blit = source->GetAsBitmap( &subrect );
 851
 852     if ( blit.IsOk() )
 853     {
 854         if ( !useMask && blit.GetMask() )
 855             blit.SetMask(NULL);
 856
 857         m_graphicContext->DrawBitmap( blit, xdest, ydest,
 858                                       dstWidth, dstHeight);
 859     }
 860     else
 861     {
 862         wxFAIL_MSG( wxT("Cannot Blit. Unable to get contents of DC as bitmap.") );
 863         return false;
 864     }
 865
 866     // reset logical function
 867     m_graphicContext->SetLogicalFunction( m_logicalFunction );
 868
 869     return true;
 870 }
 871
 872 void wxGCDCImpl::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
 873                                double angle)
 874 {
 875     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
 876
 877     if ( str.length() == 0 )
 878         return;
 879     if ( !m_logicalFunctionSupported )
 880         return;
 881
 882     if ( m_backgroundMode == wxTRANSPARENT )
 883         m_graphicContext->DrawText( str, x ,y , DegToRad(angle ));
 884     else
 885         m_graphicContext->DrawText( str, x ,y , DegToRad(angle ), m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 886 }
 887
 888 void wxGCDCImpl::DoDrawText(const wxString& str, wxCoord x, wxCoord y)
 889 {
 890     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawText - invalid DC") );
 891
 892     if ( str.length() == 0 )
 893         return;
 894
 895     if ( !m_logicalFunctionSupported )
 896         return;
 897
 898     if ( m_backgroundMode == wxTRANSPARENT )
 899         m_graphicContext->DrawText( str, x ,y);
 900     else
 901         m_graphicContext->DrawText( str, x ,y , m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 902 }
 903
 904 bool wxGCDCImpl::CanGetTextExtent() const
 905 {
 906     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::CanGetTextExtent - invalid DC") );
 907
 908     return true;
 909 }
 910
 911 void wxGCDCImpl::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
 912                               wxCoord *descent, wxCoord *externalLeading ,
 913                               const wxFont *theFont ) const
 914 {
 915     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );
 916
 917     if ( theFont )
 918     {
 919         m_graphicContext->SetFont( *theFont, m_textForegroundColour );
 920     }
 921
 922     wxDouble h , d , e , w;
 923
 924     m_graphicContext->GetTextExtent( str, &w, &h, &d, &e );
 925
 926     if ( height )
 927         *height = (wxCoord)(h+0.5);
 928     if ( descent )
 929         *descent = (wxCoord)(d+0.5);
 930     if ( externalLeading )
 931         *externalLeading = (wxCoord)(e+0.5);
 932     if ( width )
 933         *width = (wxCoord)(w+0.5);
 934
 935     if ( theFont )
 936     {
 937         m_graphicContext->SetFont( m_font, m_textForegroundColour );
 938     }
 939 }
 940
 941 bool wxGCDCImpl::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
 942 {
 943     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::DoGetPartialTextExtents - invalid DC") );
 944     widths.Clear();
 945     widths.Add(0,text.Length());
 946     if ( text.IsEmpty() )
 947         return true;
 948
 949     wxArrayDouble widthsD;
 950
 951     m_graphicContext->GetPartialTextExtents( text, widthsD );
 952     for ( size_t i = 0; i < widths.GetCount(); ++i )
 953         widths[i] = (wxCoord)(widthsD[i] + 0.5);
 954
 955     return true;
 956 }
 957
 958 wxCoord wxGCDCImpl::GetCharWidth(void) const
 959 {
 960     wxCoord width;
 961     DoGetTextExtent( wxT("g") , &width , NULL , NULL , NULL , NULL );
 962
 963     return width;
 964 }
 965
 966 wxCoord wxGCDCImpl::GetCharHeight(void) const
 967 {
 968     wxCoord height;
 969     DoGetTextExtent( wxT("g") , NULL , &height , NULL , NULL , NULL );
 970
 971     return height;
 972 }
 973
 974 void wxGCDCImpl::Clear(void)
 975 {
 976     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::Clear - invalid DC") );
 977     // TODO better implementation / incorporate size info into wxGCDC or context
 978     m_graphicContext->SetBrush( m_backgroundBrush );
 979     wxPen p = *wxTRANSPARENT_PEN;
 980     m_graphicContext->SetPen( p );
 981     DoDrawRectangle( 0, 0, 32000 , 32000 );
 982     m_graphicContext->SetPen( m_pen );
 983     m_graphicContext->SetBrush( m_brush );
 984 }
 985
 986 void wxGCDCImpl::DoGetSize(int *width, int *height) const
 987 {
 988     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoGetSize - invalid DC") );
 989     wxDouble w,h;
 990     m_graphicContext->GetSize( &w, &h );
 991     if ( height )
 992         *height = (int) (h+0.5);
 993     if ( width )
 994         *width = (int) (w+0.5);
 995 }
 996
 997 void wxGCDCImpl::DoGradientFillLinear(const wxRect& rect,
 998                                   const wxColour& initialColour,
 999                                   const wxColour& destColour,
1000                                   wxDirection nDirection )
1001 {
1002     wxPoint start;
1003     wxPoint end;
1004     switch( nDirection)
1005     {
1006     case wxWEST :
1007         start = rect.GetRightBottom();
1008         start.x++;
1009         end = rect.GetLeftBottom();
1010         break;
1011     case wxEAST :
1012         start = rect.GetLeftBottom();
1013         end = rect.GetRightBottom();
1014         end.x++;
1015         break;
1016     case wxNORTH :
1017         start = rect.GetLeftBottom();
1018         start.y++;
1019         end = rect.GetLeftTop();
1020         break;
1021     case wxSOUTH :
1022         start = rect.GetLeftTop();
1023         end = rect.GetLeftBottom();
1024         end.y++;
1025         break;
1026     default :
1027         break;
1028     }
1029
1030     if (rect.width == 0 || rect.height == 0)
1031         return;
1032
1033     m_graphicContext->SetBrush( m_graphicContext->CreateLinearGradientBrush(
1034         start.x,start.y,end.x,end.y, initialColour, destColour));
1035     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1036     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1037     m_graphicContext->SetPen(m_pen);
1038 }
1039
1040 void wxGCDCImpl::DoGradientFillConcentric(const wxRect& rect,
1041                                       const wxColour& initialColour,
1042                                       const wxColour& destColour,
1043                                       const wxPoint& circleCenter)
1044 {
1045     //Radius
1046     wxInt32 cx = rect.GetWidth() / 2;
1047     wxInt32 cy = rect.GetHeight() / 2;
1048     wxInt32 nRadius;
1049     if (cx < cy)
1050         nRadius = cx;
1051     else
1052         nRadius = cy;
1053
1054     // make sure the background is filled (todo move into specific platform implementation ?)
1055     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1056     m_graphicContext->SetBrush( wxBrush( destColour) );
1057     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1058
1059     m_graphicContext->SetBrush( m_graphicContext->CreateRadialGradientBrush(
1060         rect.x+circleCenter.x,rect.y+circleCenter.y,
1061         rect.x+circleCenter.x,rect.y+circleCenter.y,
1062         nRadius,initialColour,destColour));
1063
1064     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1065     m_graphicContext->SetPen(m_pen);
1066 }
1067
1068 void wxGCDCImpl::DoDrawCheckMark(wxCoord x, wxCoord y,
1069                              wxCoord width, wxCoord height)
1070 {
1071     wxDCImpl::DoDrawCheckMark(x,y,width,height);
1072 }
1073
1074 #endif // wxUSE_GRAPHICS_CONTEXT