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_OR_COCOA__
  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_OR_COCOA__
 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( wxMappingMode 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( wxRasterOperationMode 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),
 467                              wxFloodFillStyle WXUNUSED(style))
 468 {
 469     return false;
 470 }
 471
 472 bool wxGCDCImpl::DoGetPixel( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxColour *WXUNUSED(col) ) const
 473 {
 474     //  wxCHECK_MSG( 0 , false, wxT("wxGCDC(cg)::DoGetPixel - not implemented") );
 475     return false;
 476 }
 477
 478 void wxGCDCImpl::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 479 {
 480     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLine - invalid DC") );
 481
 482     if ( !m_logicalFunctionSupported )
 483         return;
 484
 485     m_graphicContext->StrokeLine(x1,y1,x2,y2);
 486
 487     CalcBoundingBox(x1, y1);
 488     CalcBoundingBox(x2, y2);
 489 }
 490
 491 void wxGCDCImpl::DoCrossHair( wxCoord x, wxCoord y )
 492 {
 493     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoCrossHair - invalid DC") );
 494
 495     if ( !m_logicalFunctionSupported )
 496         return;
 497
 498     int w = 0, h = 0;
 499
 500     GetOwner()->GetSize( &w, &h );
 501
 502     m_graphicContext->StrokeLine(0,y,w,y);
 503     m_graphicContext->StrokeLine(x,0,x,h);
 504
 505     CalcBoundingBox(0, 0);
 506     CalcBoundingBox(0+w, 0+h);
 507 }
 508
 509 void wxGCDCImpl::DoDrawArc( wxCoord x1, wxCoord y1,
 510                         wxCoord x2, wxCoord y2,
 511                         wxCoord xc, wxCoord yc )
 512 {
 513     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawArc - invalid DC") );
 514
 515     if ( !m_logicalFunctionSupported )
 516         return;
 517
 518     double dx = x1 - xc;
 519     double dy = y1 - yc;
 520     double radius = sqrt((double)(dx * dx + dy * dy));
 521     wxCoord rad = (wxCoord)radius;
 522     double sa, ea;
 523     if (x1 == x2 && y1 == y2)
 524     {
 525         sa = 0.0;
 526         ea = 360.0;
 527     }
 528     else if (radius == 0.0)
 529     {
 530         sa = ea = 0.0;
 531     }
 532     else
 533     {
 534         sa = (x1 - xc == 0) ?
 535      (y1 - yc < 0) ? 90.0 : -90.0 :
 536              -atan2(double(y1 - yc), double(x1 - xc)) * RAD2DEG;
 537         ea = (x2 - xc == 0) ?
 538      (y2 - yc < 0) ? 90.0 : -90.0 :
 539              -atan2(double(y2 - yc), double(x2 - xc)) * RAD2DEG;
 540     }
 541
 542     bool fill = m_brush.GetStyle() != wxTRANSPARENT;
 543
 544     wxGraphicsPath path = m_graphicContext->CreatePath();
 545     if ( fill && ((x1!=x2)||(y1!=y2)) )
 546         path.MoveToPoint( xc, yc );
 547     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 548     // get clockwise angles
 549     path.AddArc( xc, yc , rad , DegToRad(-sa) , DegToRad(-ea), false );
 550     if ( fill && ((x1!=x2)||(y1!=y2)) )
 551         path.AddLineToPoint( xc, yc );
 552     m_graphicContext->DrawPath(path);
 553 }
 554
 555 void wxGCDCImpl::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 556                                 double sa, double ea )
 557 {
 558     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawEllipticArc - invalid DC") );
 559
 560     if ( !m_logicalFunctionSupported )
 561         return;
 562
 563     m_graphicContext->PushState();
 564     m_graphicContext->Translate(x+w/2.0,y+h/2.0);
 565     wxDouble factor = ((wxDouble) w) / h;
 566     m_graphicContext->Scale( factor , 1.0);
 567
 568     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 569     // get clockwise angles
 570     if ( m_brush.GetStyle() != wxTRANSPARENT )
 571     {
 572         wxGraphicsPath path = m_graphicContext->CreatePath();
 573         path.MoveToPoint( 0, 0 );
 574         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 575         path.AddLineToPoint( 0, 0 );
 576         m_graphicContext->FillPath( path );
 577
 578         path = m_graphicContext->CreatePath();
 579         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 580         m_graphicContext->StrokePath( path );
 581     }
 582     else
 583     {
 584         wxGraphicsPath path = m_graphicContext->CreatePath();
 585         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 586         m_graphicContext->DrawPath( path );
 587     }
 588
 589     m_graphicContext->PopState();
 590 }
 591
 592 void wxGCDCImpl::DoDrawPoint( wxCoord x, wxCoord y )
 593 {
 594     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawPoint - invalid DC") );
 595
 596     DoDrawLine( x , y , x + 1 , y + 1 );
 597 }
 598
 599 void wxGCDCImpl::DoDrawLines(int n, wxPoint points[],
 600                          wxCoord xoffset, wxCoord yoffset)
 601 {
 602     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLines - invalid DC") );
 603
 604     if ( !m_logicalFunctionSupported )
 605         return;
 606
 607     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n];
 608     for( int i = 0; i < n; ++i)
 609     {
 610         pointsD[i].m_x = points[i].x + xoffset;
 611         pointsD[i].m_y = points[i].y + yoffset;
 612     }
 613
 614     m_graphicContext->StrokeLines( n , pointsD);
 615     delete[] pointsD;
 616 }
 617
 618 #if wxUSE_SPLINES
 619 void wxGCDCImpl::DoDrawSpline(const wxPointList *points)
 620 {
 621     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawSpline - invalid DC") );
 622
 623     if ( !m_logicalFunctionSupported )
 624         return;
 625
 626     wxGraphicsPath path = m_graphicContext->CreatePath();
 627
 628     wxPointList::compatibility_iterator node = points->GetFirst();
 629     if (node == wxPointList::compatibility_iterator())
 630         // empty list
 631         return;
 632
 633     wxPoint *p = node->GetData();
 634
 635     wxCoord x1 = p->x;
 636     wxCoord y1 = p->y;
 637
 638     node = node->GetNext();
 639     p = node->GetData();
 640
 641     wxCoord x2 = p->x;
 642     wxCoord y2 = p->y;
 643     wxCoord cx1 = ( x1 + x2 ) / 2;
 644     wxCoord cy1 = ( y1 + y2 ) / 2;
 645
 646     path.MoveToPoint( x1 , y1 );
 647     path.AddLineToPoint( cx1 , cy1 );
 648 #if !wxUSE_STL
 649
 650     while ((node = node->GetNext()) != NULL)
 651 #else
 652
 653     while ((node = node->GetNext()))
 654 #endif // !wxUSE_STL
 655
 656     {
 657         p = node->GetData();
 658         x1 = x2;
 659         y1 = y2;
 660         x2 = p->x;
 661         y2 = p->y;
 662         wxCoord cx4 = (x1 + x2) / 2;
 663         wxCoord cy4 = (y1 + y2) / 2;
 664
 665         path.AddQuadCurveToPoint(x1 , y1 ,cx4 , cy4 );
 666
 667         cx1 = cx4;
 668         cy1 = cy4;
 669     }
 670
 671     path.AddLineToPoint( x2 , y2 );
 672
 673     m_graphicContext->StrokePath( path );
 674 }
 675 #endif // wxUSE_SPLINES
 676
 677 void wxGCDCImpl::DoDrawPolygon( int n, wxPoint points[],
 678                                 wxCoord xoffset, wxCoord yoffset,
 679                                 wxPolygonFillMode fillStyle )
 680 {
 681     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawPolygon - invalid DC") );
 682
 683     if ( n <= 0 || (m_brush.GetStyle() == wxTRANSPARENT && m_pen.GetStyle() == wxTRANSPARENT ) )
 684         return;
 685     if ( !m_logicalFunctionSupported )
 686         return;
 687
 688     bool closeIt = false;
 689     if (points[n-1] != points[0])
 690         closeIt = true;
 691
 692     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n+(closeIt?1:0)];
 693     for( int i = 0; i < n; ++i)
 694     {
 695         pointsD[i].m_x = points[i].x + xoffset;
 696         pointsD[i].m_y = points[i].y + yoffset;
 697     }
 698     if ( closeIt )
 699         pointsD[n] = pointsD[0];
 700
 701     m_graphicContext->DrawLines( n+(closeIt?1:0) , pointsD, fillStyle);
 702     delete[] pointsD;
 703 }
 704
 705 void wxGCDCImpl::DoDrawPolyPolygon(int n,
 706                                int count[],
 707                                wxPoint points[],
 708                                wxCoord xoffset,
 709                                wxCoord yoffset,
 710                                wxPolygonFillMode fillStyle)
 711 {
 712     wxASSERT(n > 1);
 713     wxGraphicsPath path = m_graphicContext->CreatePath();
 714
 715     int i = 0;
 716     for ( int j = 0; j < n; ++j)
 717     {
 718         wxPoint start = points[i];
 719         path.MoveToPoint( start.x+ xoffset, start.y+ yoffset);
 720         ++i;
 721         int l = count[j];
 722         for ( int k = 1; k < l; ++k)
 723         {
 724             path.AddLineToPoint( points[i].x+ xoffset, points[i].y+ yoffset);
 725             ++i;
 726         }
 727         // close the polygon
 728         if ( start != points[i-1])
 729             path.AddLineToPoint( start.x+ xoffset, start.y+ yoffset);
 730     }
 731     m_graphicContext->DrawPath( path , fillStyle);
 732 }
 733
 734 void wxGCDCImpl::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 735 {
 736     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRectangle - invalid DC") );
 737
 738     if ( !m_logicalFunctionSupported )
 739         return;
 740
 741     // CMB: draw nothing if transformed w or h is 0
 742     if (w == 0 || h == 0)
 743         return;
 744
 745     if ( m_graphicContext->ShouldOffset() )
 746     {
 747         // if we are offsetting the entire rectangle is moved 0.5, so the
 748         // border line gets off by 1
 749         w -= 1;
 750         h -= 1;
 751     }
 752     m_graphicContext->DrawRectangle(x,y,w,h);
 753 }
 754
 755 void wxGCDCImpl::DoDrawRoundedRectangle(wxCoord x, wxCoord y,
 756                                     wxCoord w, wxCoord h,
 757                                     double radius)
 758 {
 759     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRoundedRectangle - invalid DC") );
 760
 761     if ( !m_logicalFunctionSupported )
 762         return;
 763
 764     if (radius < 0.0)
 765         radius = - radius * ((w < h) ? w : h);
 766
 767     // CMB: draw nothing if transformed w or h is 0
 768     if (w == 0 || h == 0)
 769         return;
 770
 771     if ( m_graphicContext->ShouldOffset() )
 772     {
 773         // if we are offsetting the entire rectangle is moved 0.5, so the
 774         // border line gets off by 1
 775         w -= 1;
 776         h -= 1;
 777     }
 778     m_graphicContext->DrawRoundedRectangle( x,y,w,h,radius);
 779 }
 780
 781 void wxGCDCImpl::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 782 {
 783     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawEllipse - invalid DC") );
 784
 785     if ( !m_logicalFunctionSupported )
 786         return;
 787
 788     if ( m_graphicContext->ShouldOffset() )
 789     {
 790         // if we are offsetting the entire rectangle is moved 0.5, so the
 791         // border line gets off by 1
 792         w -= 1;
 793         h -= 1;
 794     }
 795     m_graphicContext->DrawEllipse(x,y,w,h);
 796 }
 797
 798 bool wxGCDCImpl::CanDrawBitmap() const
 799 {
 800     return true;
 801 }
 802
 803 bool wxGCDCImpl::DoBlit(
 804     wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 805     wxDC *source, wxCoord xsrc, wxCoord ysrc,
 806     wxRasterOperationMode logical_func , bool useMask,
 807     wxCoord xsrcMask, wxCoord ysrcMask )
 808 {
 809     return DoStretchBlit( xdest, ydest, width, height,
 810         source, xsrc, ysrc, width, height, logical_func, useMask,
 811         xsrcMask,ysrcMask );
 812 }
 813
 814 bool wxGCDCImpl::DoStretchBlit(
 815     wxCoord xdest, wxCoord ydest, wxCoord dstWidth, wxCoord dstHeight,
 816     wxDC *source, wxCoord xsrc, wxCoord ysrc, wxCoord srcWidth, wxCoord srcHeight,
 817     wxRasterOperationMode logical_func , bool useMask,
 818     wxCoord xsrcMask, wxCoord ysrcMask )
 819 {
 820     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid DC") );
 821     wxCHECK_MSG( source->IsOk(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid source DC") );
 822
 823     if ( logical_func == wxNO_OP )
 824         return true;
 825     else if ( !m_graphicContext->SetLogicalFunction( logical_func ) )
 826     {
 827         wxFAIL_MSG( wxT("Blitting is only supported with wxCOPY logical operation.") );
 828         return false;
 829     }
 830
 831     if (xsrcMask == -1 && ysrcMask == -1)
 832     {
 833         xsrcMask = xsrc;
 834         ysrcMask = ysrc;
 835     }
 836
 837     wxRect subrect(source->LogicalToDeviceX(xsrc),
 838                    source->LogicalToDeviceY(ysrc),
 839                    source->LogicalToDeviceXRel(srcWidth),
 840                    source->LogicalToDeviceYRel(srcHeight));
 841
 842     // if needed clip the subrect down to the size of the source DC
 843     wxCoord sw, sh;
 844     source->GetSize(&sw, &sh);
 845     sw = source->LogicalToDeviceXRel(sw);
 846     sh = source->LogicalToDeviceYRel(sh);
 847     if (subrect.x + subrect.width > sw)
 848         subrect.width = sw - subrect.x;
 849     if (subrect.y + subrect.height > sh)
 850         subrect.height = sh - subrect.y;
 851
 852     wxBitmap blit = source->GetAsBitmap( &subrect );
 853
 854     if ( blit.IsOk() )
 855     {
 856         if ( !useMask && blit.GetMask() )
 857             blit.SetMask(NULL);
 858
 859         m_graphicContext->DrawBitmap( blit, xdest, ydest,
 860                                       dstWidth, dstHeight);
 861     }
 862     else
 863     {
 864         wxFAIL_MSG( wxT("Cannot Blit. Unable to get contents of DC as bitmap.") );
 865         return false;
 866     }
 867
 868     // reset logical function
 869     m_graphicContext->SetLogicalFunction( m_logicalFunction );
 870
 871     return true;
 872 }
 873
 874 void wxGCDCImpl::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
 875                                double angle)
 876 {
 877     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
 878
 879     if ( str.length() == 0 )
 880         return;
 881     if ( !m_logicalFunctionSupported )
 882         return;
 883
 884     if ( m_backgroundMode == wxTRANSPARENT )
 885         m_graphicContext->DrawText( str, x ,y , DegToRad(angle ));
 886     else
 887         m_graphicContext->DrawText( str, x ,y , DegToRad(angle ), m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 888 }
 889
 890 void wxGCDCImpl::DoDrawText(const wxString& str, wxCoord x, wxCoord y)
 891 {
 892     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawText - invalid DC") );
 893
 894     if ( str.length() == 0 )
 895         return;
 896
 897     if ( !m_logicalFunctionSupported )
 898         return;
 899
 900     if ( m_backgroundMode == wxTRANSPARENT )
 901         m_graphicContext->DrawText( str, x ,y);
 902     else
 903         m_graphicContext->DrawText( str, x ,y , m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 904 }
 905
 906 bool wxGCDCImpl::CanGetTextExtent() const
 907 {
 908     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::CanGetTextExtent - invalid DC") );
 909
 910     return true;
 911 }
 912
 913 void wxGCDCImpl::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
 914                               wxCoord *descent, wxCoord *externalLeading ,
 915                               const wxFont *theFont ) const
 916 {
 917     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );
 918
 919     if ( theFont )
 920     {
 921         m_graphicContext->SetFont( *theFont, m_textForegroundColour );
 922     }
 923
 924     wxDouble h , d , e , w;
 925
 926     m_graphicContext->GetTextExtent( str, &w, &h, &d, &e );
 927
 928     if ( height )
 929         *height = (wxCoord)(h+0.5);
 930     if ( descent )
 931         *descent = (wxCoord)(d+0.5);
 932     if ( externalLeading )
 933         *externalLeading = (wxCoord)(e+0.5);
 934     if ( width )
 935         *width = (wxCoord)(w+0.5);
 936
 937     if ( theFont )
 938     {
 939         m_graphicContext->SetFont( m_font, m_textForegroundColour );
 940     }
 941 }
 942
 943 bool wxGCDCImpl::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
 944 {
 945     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::DoGetPartialTextExtents - invalid DC") );
 946     widths.Clear();
 947     widths.Add(0,text.Length());
 948     if ( text.IsEmpty() )
 949         return true;
 950
 951     wxArrayDouble widthsD;
 952
 953     m_graphicContext->GetPartialTextExtents( text, widthsD );
 954     for ( size_t i = 0; i < widths.GetCount(); ++i )
 955         widths[i] = (wxCoord)(widthsD[i] + 0.5);
 956
 957     return true;
 958 }
 959
 960 wxCoord wxGCDCImpl::GetCharWidth(void) const
 961 {
 962     wxCoord width;
 963     DoGetTextExtent( wxT("g") , &width , NULL , NULL , NULL , NULL );
 964
 965     return width;
 966 }
 967
 968 wxCoord wxGCDCImpl::GetCharHeight(void) const
 969 {
 970     wxCoord height;
 971     DoGetTextExtent( wxT("g") , NULL , &height , NULL , NULL , NULL );
 972
 973     return height;
 974 }
 975
 976 void wxGCDCImpl::Clear(void)
 977 {
 978     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::Clear - invalid DC") );
 979     // TODO better implementation / incorporate size info into wxGCDC or context
 980     m_graphicContext->SetBrush( m_backgroundBrush );
 981     wxPen p = *wxTRANSPARENT_PEN;
 982     m_graphicContext->SetPen( p );
 983     DoDrawRectangle( 0, 0, 32000 , 32000 );
 984     m_graphicContext->SetPen( m_pen );
 985     m_graphicContext->SetBrush( m_brush );
 986 }
 987
 988 void wxGCDCImpl::DoGetSize(int *width, int *height) const
 989 {
 990     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoGetSize - invalid DC") );
 991     wxDouble w,h;
 992     m_graphicContext->GetSize( &w, &h );
 993     if ( height )
 994         *height = (int) (h+0.5);
 995     if ( width )
 996         *width = (int) (w+0.5);
 997 }
 998
 999 void wxGCDCImpl::DoGradientFillLinear(const wxRect& rect,
1000                                   const wxColour& initialColour,
1001                                   const wxColour& destColour,
1002                                   wxDirection nDirection )
1003 {
1004     wxPoint start;
1005     wxPoint end;
1006     switch( nDirection)
1007     {
1008     case wxWEST :
1009         start = rect.GetRightBottom();
1010         start.x++;
1011         end = rect.GetLeftBottom();
1012         break;
1013     case wxEAST :
1014         start = rect.GetLeftBottom();
1015         end = rect.GetRightBottom();
1016         end.x++;
1017         break;
1018     case wxNORTH :
1019         start = rect.GetLeftBottom();
1020         start.y++;
1021         end = rect.GetLeftTop();
1022         break;
1023     case wxSOUTH :
1024         start = rect.GetLeftTop();
1025         end = rect.GetLeftBottom();
1026         end.y++;
1027         break;
1028     default :
1029         break;
1030     }
1031
1032     if (rect.width == 0 || rect.height == 0)
1033         return;
1034
1035     m_graphicContext->SetBrush( m_graphicContext->CreateLinearGradientBrush(
1036         start.x,start.y,end.x,end.y, initialColour, destColour));
1037     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1038     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1039     m_graphicContext->SetPen(m_pen);
1040 }
1041
1042 void wxGCDCImpl::DoGradientFillConcentric(const wxRect& rect,
1043                                       const wxColour& initialColour,
1044                                       const wxColour& destColour,
1045                                       const wxPoint& circleCenter)
1046 {
1047     //Radius
1048     wxInt32 cx = rect.GetWidth() / 2;
1049     wxInt32 cy = rect.GetHeight() / 2;
1050     wxInt32 nRadius;
1051     if (cx < cy)
1052         nRadius = cx;
1053     else
1054         nRadius = cy;
1055
1056     // make sure the background is filled (todo move into specific platform implementation ?)
1057     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1058     m_graphicContext->SetBrush( wxBrush( destColour) );
1059     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1060
1061     m_graphicContext->SetBrush( m_graphicContext->CreateRadialGradientBrush(
1062         rect.x+circleCenter.x,rect.y+circleCenter.y,
1063         rect.x+circleCenter.x,rect.y+circleCenter.y,
1064         nRadius,initialColour,destColour));
1065
1066     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1067     m_graphicContext->SetPen(m_pen);
1068 }
1069
1070 void wxGCDCImpl::DoDrawCheckMark(wxCoord x, wxCoord y,
1071                              wxCoord width, wxCoord height)
1072 {
1073     wxDCImpl::DoDrawCheckMark(x,y,width,height);
1074 }
1075
1076 #endif // wxUSE_GRAPHICS_CONTEXT