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 #ifdef __WXMAC__
  32 #include "wx/mac/private.h"
  33 #endif
  34 //-----------------------------------------------------------------------------
  35 // constants
  36 //-----------------------------------------------------------------------------
  37
  38 static const double RAD2DEG = 180.0 / M_PI;
  39
  40 //-----------------------------------------------------------------------------
  41 // Local functions
  42 //-----------------------------------------------------------------------------
  43
  44 static inline double DegToRad(double deg)
  45 {
  46     return (deg * M_PI) / 180.0;
  47 }
  48
  49 //-----------------------------------------------------------------------------
  50 // wxDC bridge class
  51 //-----------------------------------------------------------------------------
  52
  53 IMPLEMENT_DYNAMIC_CLASS(wxGCDC, wxDC)
  54
  55 wxGCDC::wxGCDC(const wxWindowDC& dc)
  56 {
  57     m_pimpl = new wxGCDCImpl( this, dc );
  58 }
  59
  60 wxGCDC::wxGCDC( const wxMemoryDC& dc)
  61 {
  62     m_pimpl = new wxGCDCImpl( this, dc );
  63 }
  64
  65 wxGCDC::wxGCDC()
  66 {
  67     m_pimpl = new wxGCDCImpl( this );
  68 }
  69
  70 wxGraphicsContext* wxGCDC::GetGraphicsContext()
  71 {
  72     if (!m_pimpl) return NULL;
  73     wxGCDCImpl *gc_impl = (wxGCDCImpl*) m_pimpl;
  74     return gc_impl->GetGraphicsContext();
  75 }
  76
  77 void wxGCDC::SetGraphicsContext( wxGraphicsContext* ctx )
  78 {
  79     if (!m_pimpl) return;
  80     wxGCDCImpl *gc_impl = (wxGCDCImpl*) m_pimpl;
  81     gc_impl->SetGraphicsContext( ctx );
  82 }
  83
  84 IMPLEMENT_ABSTRACT_CLASS(wxGCDCImpl, wxDCImpl)
  85
  86 wxGCDCImpl::wxGCDCImpl( wxDC *owner ) :
  87    wxDCImpl( owner )
  88 {
  89     Init();
  90 }
  91
  92 void wxGCDCImpl::SetGraphicsContext( wxGraphicsContext* ctx )
  93 {
  94     delete m_graphicContext;
  95     m_graphicContext = ctx;
  96     if ( m_graphicContext )
  97     {
  98         m_matrixOriginal = m_graphicContext->GetTransform();
  99         m_ok = true;
 100         // apply the stored transformations to the passed in context
 101         ComputeScaleAndOrigin();
 102         m_graphicContext->SetFont( m_font , m_textForegroundColour );
 103         m_graphicContext->SetPen( m_pen );
 104         m_graphicContext->SetBrush( m_brush);
 105     }
 106 }
 107
 108 wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxWindowDC& dc ) :
 109    wxDCImpl( owner )
 110 {
 111     Init();
 112     SetGraphicsContext( wxGraphicsContext::Create(dc) );
 113 }
 114
 115 wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxMemoryDC& dc ) :
 116    wxDCImpl( owner )
 117 {
 118     Init();
 119     SetGraphicsContext( wxGraphicsContext::Create(dc) );
 120 }
 121
 122 void wxGCDCImpl::Init()
 123 {
 124     m_ok = false;
 125     m_colour = true;
 126     m_mm_to_pix_x = mm2pt;
 127     m_mm_to_pix_y = mm2pt;
 128
 129     m_pen = *wxBLACK_PEN;
 130     m_font = *wxNORMAL_FONT;
 131     m_brush = *wxWHITE_BRUSH;
 132
 133     m_graphicContext = NULL;
 134     m_logicalFunctionSupported = true;
 135 }
 136
 137
 138 wxGCDCImpl::~wxGCDCImpl()
 139 {
 140     delete m_graphicContext;
 141 }
 142
 143 void wxGCDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool WXUNUSED(useMask) )
 144 {
 145     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid DC") );
 146     wxCHECK_RET( bmp.IsOk(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid bitmap") );
 147
 148     if ( bmp.GetDepth() == 1 )
 149     {
 150         m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
 151         m_graphicContext->SetBrush( wxBrush( m_textBackgroundColour , wxSOLID ) );
 152         m_graphicContext->DrawRectangle( x , y , bmp.GetWidth() , bmp.GetHeight() );
 153         m_graphicContext->SetBrush( wxBrush( m_textForegroundColour , wxSOLID ) );
 154         m_graphicContext->DrawBitmap( bmp, x , y , bmp.GetWidth() , bmp.GetHeight() );
 155         m_graphicContext->SetBrush( m_graphicContext->CreateBrush(m_brush));
 156         m_graphicContext->SetPen( m_graphicContext->CreatePen(m_pen));
 157     }
 158     else
 159         m_graphicContext->DrawBitmap( bmp, x , y , bmp.GetWidth() , bmp.GetHeight() );
 160 }
 161
 162 void wxGCDCImpl::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
 163 {
 164     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawIcon - invalid DC") );
 165     wxCHECK_RET( icon.IsOk(), wxT("wxGCDC(cg)::DoDrawIcon - invalid icon") );
 166
 167     wxCoord w = icon.GetWidth();
 168     wxCoord h = icon.GetHeight();
 169
 170     m_graphicContext->DrawIcon( icon , x, y, w, h );
 171 }
 172
 173 bool wxGCDCImpl::StartDoc( const wxString& WXUNUSED(message) )
 174 {
 175     return false;
 176 }
 177
 178 void wxGCDCImpl::EndDoc()
 179 {
 180 }
 181
 182 void wxGCDCImpl::StartPage()
 183 {
 184 }
 185
 186 void wxGCDCImpl::EndPage()
 187 {
 188 }
 189
 190 void wxGCDCImpl::Flush()
 191 {
 192 #ifdef __WXMAC__
 193     CGContextFlush( (CGContextRef) m_graphicContext->GetNativeContext() );
 194 #endif
 195 }
 196
 197 void wxGCDCImpl::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
 198 {
 199     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoSetClippingRegion - invalid DC") );
 200
 201     m_graphicContext->Clip( x, y, w, h );
 202     if ( m_clipping )
 203     {
 204         m_clipX1 = wxMax( m_clipX1, x );
 205         m_clipY1 = wxMax( m_clipY1, y );
 206         m_clipX2 = wxMin( m_clipX2, (x + w) );
 207         m_clipY2 = wxMin( m_clipY2, (y + h) );
 208     }
 209     else
 210     {
 211         m_clipping = true;
 212
 213         m_clipX1 = x;
 214         m_clipY1 = y;
 215         m_clipX2 = x + w;
 216         m_clipY2 = y + h;
 217     }
 218 }
 219
 220 void wxGCDCImpl::DoSetClippingRegionAsRegion( const wxRegion &region )
 221 {
 222     // region is in device coordinates
 223     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoSetClippingRegionAsRegion - invalid DC") );
 224
 225     if (region.Empty())
 226     {
 227         //DestroyClippingRegion();
 228         return;
 229     }
 230
 231     wxRegion logRegion( region );
 232     wxCoord x, y, w, h;
 233
 234     logRegion.Offset( DeviceToLogicalX(0), DeviceToLogicalY(0) );
 235     logRegion.GetBox( x, y, w, h );
 236
 237     m_graphicContext->Clip( logRegion );
 238     if ( m_clipping )
 239     {
 240         m_clipX1 = wxMax( m_clipX1, x );
 241         m_clipY1 = wxMax( m_clipY1, y );
 242         m_clipX2 = wxMin( m_clipX2, (x + w) );
 243         m_clipY2 = wxMin( m_clipY2, (y + h) );
 244     }
 245     else
 246     {
 247         m_clipping = true;
 248
 249         m_clipX1 = x;
 250         m_clipY1 = y;
 251         m_clipX2 = x + w;
 252         m_clipY2 = y + h;
 253     }
 254 }
 255
 256 void wxGCDCImpl::DestroyClippingRegion()
 257 {
 258     m_graphicContext->ResetClip();
 259     // currently the clip eg of a window extends to the area between the scrollbars
 260     // so we must explicitely make sure it only covers the area we want it to draw
 261     int width, height ;
 262     GetOwner()->GetSize( &width , &height ) ;
 263     m_graphicContext->Clip( DeviceToLogicalX(0) , DeviceToLogicalY(0) , DeviceToLogicalXRel(width), DeviceToLogicalYRel(height) );
 264
 265     m_graphicContext->SetPen( m_pen );
 266     m_graphicContext->SetBrush( m_brush );
 267
 268     m_clipping = false;
 269 }
 270
 271 void wxGCDCImpl::DoGetSizeMM( int* width, int* height ) const
 272 {
 273     int w = 0, h = 0;
 274
 275     GetOwner()->GetSize( &w, &h );
 276     if (width)
 277         *width = long( double(w) / (m_scaleX * m_mm_to_pix_x) );
 278     if (height)
 279         *height = long( double(h) / (m_scaleY * m_mm_to_pix_y) );
 280 }
 281
 282 void wxGCDCImpl::SetTextForeground( const wxColour &col )
 283 {
 284     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::SetTextForeground - invalid DC") );
 285
 286     if ( col != m_textForegroundColour )
 287     {
 288         m_textForegroundColour = col;
 289         m_graphicContext->SetFont( m_font, m_textForegroundColour );
 290     }
 291 }
 292
 293 void wxGCDCImpl::SetTextBackground( const wxColour &col )
 294 {
 295     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::SetTextBackground - invalid DC") );
 296
 297     m_textBackgroundColour = col;
 298 }
 299
 300 void wxGCDCImpl::SetMapMode( int mode )
 301 {
 302     switch (mode)
 303     {
 304     case wxMM_TWIPS:
 305         SetLogicalScale( twips2mm * m_mm_to_pix_x, twips2mm * m_mm_to_pix_y );
 306         break;
 307
 308     case wxMM_POINTS:
 309         SetLogicalScale( pt2mm * m_mm_to_pix_x, pt2mm * m_mm_to_pix_y );
 310         break;
 311
 312     case wxMM_METRIC:
 313         SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
 314         break;
 315
 316     case wxMM_LOMETRIC:
 317         SetLogicalScale( m_mm_to_pix_x / 10.0, m_mm_to_pix_y / 10.0 );
 318         break;
 319
 320     case wxMM_TEXT:
 321     default:
 322         SetLogicalScale( 1.0, 1.0 );
 323         break;
 324     }
 325
 326     ComputeScaleAndOrigin();
 327 }
 328
 329 void wxGCDCImpl::SetUserScale( double x, double y )
 330 {
 331     // allow negative ? -> no
 332
 333     m_userScaleX = x;
 334     m_userScaleY = y;
 335     ComputeScaleAndOrigin();
 336 }
 337
 338 void wxGCDCImpl::SetLogicalScale( double x, double y )
 339 {
 340     // allow negative ?
 341     m_logicalScaleX = x;
 342     m_logicalScaleY = y;
 343     ComputeScaleAndOrigin();
 344 }
 345
 346 void wxGCDCImpl::SetLogicalOrigin( wxCoord x, wxCoord y )
 347 {
 348     m_logicalOriginX = x * m_signX;   // is this still correct ?
 349     m_logicalOriginY = y * m_signY;
 350     ComputeScaleAndOrigin();
 351 }
 352
 353 void wxGCDCImpl::SetDeviceOrigin( wxCoord x, wxCoord y )
 354 {
 355     m_deviceOriginX = x;
 356     m_deviceOriginY = y;
 357     ComputeScaleAndOrigin();
 358 }
 359
 360 void wxGCDCImpl::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 361 {
 362     m_signX = (xLeftRight ?  1 : -1);
 363     m_signY = (yBottomUp ? -1 :  1);
 364     ComputeScaleAndOrigin();
 365 }
 366
 367 wxSize wxGCDCImpl::GetPPI() const
 368 {
 369     return wxSize(72, 72);
 370 }
 371
 372 int wxGCDCImpl::GetDepth() const
 373 {
 374     return 32;
 375 }
 376
 377 void wxGCDCImpl::ComputeScaleAndOrigin()
 378 {
 379     m_scaleX = m_logicalScaleX * m_userScaleX;
 380     m_scaleY = m_logicalScaleY * m_userScaleY;
 381
 382     if ( m_graphicContext )
 383     {
 384         m_matrixCurrent = m_graphicContext->CreateMatrix();
 385         m_matrixCurrent.Translate( m_deviceOriginX, m_deviceOriginY );
 386         m_matrixCurrent.Scale( m_scaleX, m_scaleY );
 387         // the logical origin sets the origin to have new coordinates
 388         m_matrixCurrent.Translate( -m_logicalOriginX, -m_logicalOriginY );
 389
 390         m_graphicContext->SetTransform( m_matrixOriginal );
 391         m_graphicContext->ConcatTransform( m_matrixCurrent );
 392     }
 393 }
 394
 395 void wxGCDCImpl::SetPalette( const wxPalette& WXUNUSED(palette) )
 396 {
 397
 398 }
 399
 400 void wxGCDCImpl::SetBackgroundMode( int mode )
 401 {
 402     m_backgroundMode = mode;
 403 }
 404
 405 void wxGCDCImpl::SetFont( const wxFont &font )
 406 {
 407     m_font = font;
 408     if ( m_graphicContext )
 409     {
 410         wxFont f = font;
 411         if ( f.IsOk() )
 412             f.SetPointSize( /*LogicalToDeviceYRel*/(font.GetPointSize()));
 413         m_graphicContext->SetFont( f, m_textForegroundColour );
 414     }
 415 }
 416
 417 void wxGCDCImpl::SetPen( const wxPen &pen )
 418 {
 419     if ( m_pen == pen )
 420         return;
 421
 422     m_pen = pen;
 423     if ( m_graphicContext )
 424     {
 425         m_graphicContext->SetPen( m_pen );
 426     }
 427 }
 428
 429 void wxGCDCImpl::SetBrush( const wxBrush &brush )
 430 {
 431     if (m_brush == brush)
 432         return;
 433
 434     m_brush = brush;
 435     if ( m_graphicContext )
 436     {
 437         m_graphicContext->SetBrush( m_brush );
 438     }
 439 }
 440
 441 void wxGCDCImpl::SetBackground( const wxBrush &brush )
 442 {
 443     if (m_backgroundBrush == brush)
 444         return;
 445
 446     m_backgroundBrush = brush;
 447     if (!m_backgroundBrush.IsOk())
 448         return;
 449 }
 450
 451 void wxGCDCImpl::SetLogicalFunction( int function )
 452 {
 453     if (m_logicalFunction == function)
 454         return;
 455
 456     m_logicalFunction = function;
 457     if ( m_graphicContext->SetLogicalFunction( function ) )
 458         m_logicalFunctionSupported=true;
 459     else
 460         m_logicalFunctionSupported=false;
 461 }
 462
 463 bool wxGCDCImpl::DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 464                          const wxColour& WXUNUSED(col), int WXUNUSED(style))
 465 {
 466     return false;
 467 }
 468
 469 bool wxGCDCImpl::DoGetPixel( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxColour *WXUNUSED(col) ) const
 470 {
 471     //  wxCHECK_MSG( 0 , false, wxT("wxGCDC(cg)::DoGetPixel - not implemented") );
 472     return false;
 473 }
 474
 475 void wxGCDCImpl::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 476 {
 477     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLine - invalid DC") );
 478
 479     if ( !m_logicalFunctionSupported )
 480         return;
 481
 482     m_graphicContext->StrokeLine(x1,y1,x2,y2);
 483
 484     CalcBoundingBox(x1, y1);
 485     CalcBoundingBox(x2, y2);
 486 }
 487
 488 void wxGCDCImpl::DoCrossHair( wxCoord x, wxCoord y )
 489 {
 490     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoCrossHair - invalid DC") );
 491
 492     if ( !m_logicalFunctionSupported )
 493         return;
 494
 495     int w = 0, h = 0;
 496
 497     GetOwner()->GetSize( &w, &h );
 498
 499     m_graphicContext->StrokeLine(0,y,w,y);
 500     m_graphicContext->StrokeLine(x,0,x,h);
 501
 502     CalcBoundingBox(0, 0);
 503     CalcBoundingBox(0+w, 0+h);
 504 }
 505
 506 void wxGCDCImpl::DoDrawArc( wxCoord x1, wxCoord y1,
 507                         wxCoord x2, wxCoord y2,
 508                         wxCoord xc, wxCoord yc )
 509 {
 510     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawArc - invalid DC") );
 511
 512     if ( !m_logicalFunctionSupported )
 513         return;
 514
 515     double dx = x1 - xc;
 516     double dy = y1 - yc;
 517     double radius = sqrt((double)(dx * dx + dy * dy));
 518     wxCoord rad = (wxCoord)radius;
 519     double sa, ea;
 520     if (x1 == x2 && y1 == y2)
 521     {
 522         sa = 0.0;
 523         ea = 360.0;
 524     }
 525     else if (radius == 0.0)
 526     {
 527         sa = ea = 0.0;
 528     }
 529     else
 530     {
 531         sa = (x1 - xc == 0) ?
 532      (y1 - yc < 0) ? 90.0 : -90.0 :
 533              -atan2(double(y1 - yc), double(x1 - xc)) * RAD2DEG;
 534         ea = (x2 - xc == 0) ?
 535      (y2 - yc < 0) ? 90.0 : -90.0 :
 536              -atan2(double(y2 - yc), double(x2 - xc)) * RAD2DEG;
 537     }
 538
 539     bool fill = m_brush.GetStyle() != wxTRANSPARENT;
 540
 541     wxGraphicsPath path = m_graphicContext->CreatePath();
 542     if ( fill && ((x1!=x2)||(y1!=y2)) )
 543         path.MoveToPoint( xc, yc );
 544     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 545     // get clockwise angles
 546     path.AddArc( xc, yc , rad , DegToRad(-sa) , DegToRad(-ea), false );
 547     if ( fill && ((x1!=x2)||(y1!=y2)) )
 548         path.AddLineToPoint( xc, yc );
 549     m_graphicContext->DrawPath(path);
 550 }
 551
 552 void wxGCDCImpl::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 553                                 double sa, double ea )
 554 {
 555     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawEllipticArc - invalid DC") );
 556
 557     if ( !m_logicalFunctionSupported )
 558         return;
 559
 560     m_graphicContext->PushState();
 561     m_graphicContext->Translate(x+w/2.0,y+h/2.0);
 562     wxDouble factor = ((wxDouble) w) / h;
 563     m_graphicContext->Scale( factor , 1.0);
 564
 565     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 566     // get clockwise angles
 567     if ( m_brush.GetStyle() != wxTRANSPARENT )
 568     {
 569         wxGraphicsPath path = m_graphicContext->CreatePath();
 570         path.MoveToPoint( 0, 0 );
 571         path.AddLineToPoint( h / 2.0 * cos(DegToRad(sa)) , h / 2.0 * sin(DegToRad(-sa)) );
 572         path.AddLineToPoint( h / 2.0 * cos(DegToRad(ea)) , h / 2.0 * sin(DegToRad(-ea)) );
 573         path.AddLineToPoint( 0, 0 );
 574         m_graphicContext->FillPath( path );
 575
 576         path = m_graphicContext->CreatePath();
 577         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 578         m_graphicContext->FillPath( path );
 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 WXUNUSED(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     {
 826         wxFAIL_MSG( wxT("Blitting is only supported with wxCOPY logical operation.") );
 827         return false;
 828     }
 829
 830     if (xsrcMask == -1 && ysrcMask == -1)
 831     {
 832         xsrcMask = xsrc;
 833         ysrcMask = ysrc;
 834     }
 835
 836     wxRect subrect(source->LogicalToDeviceX(xsrc),
 837                    source->LogicalToDeviceY(ysrc),
 838                    source->LogicalToDeviceXRel(srcWidth),
 839                    source->LogicalToDeviceYRel(srcHeight));
 840
 841     // if needed clip the subrect down to the size of the source DC
 842     wxCoord sw, sh;
 843     source->GetSize(&sw, &sh);
 844     sw = source->LogicalToDeviceXRel(sw);
 845     sh = source->LogicalToDeviceYRel(sh);
 846     if (subrect.x + subrect.width > sw)
 847         subrect.width = sw - subrect.x;
 848     if (subrect.y + subrect.height > sh)
 849         subrect.height = sh - subrect.y;
 850
 851     wxBitmap blit = source->GetAsBitmap( &subrect );
 852
 853     if ( blit.IsOk() )
 854     {
 855         m_graphicContext->DrawBitmap( blit, xdest, ydest,
 856                                       dstWidth, dstHeight);
 857     }
 858     else
 859     {
 860         wxFAIL_MSG( wxT("Cannot Blit. Unable to get contents of DC as bitmap.") );
 861         return false;
 862     }
 863
 864     // reset logical function
 865     m_graphicContext->SetLogicalFunction( m_logicalFunction );
 866
 867     return true;
 868 }
 869
 870 void wxGCDCImpl::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
 871                                double angle)
 872 {
 873     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
 874
 875     if ( str.length() == 0 )
 876         return;
 877     if ( !m_logicalFunctionSupported )
 878         return;
 879
 880     if ( m_backgroundMode == wxTRANSPARENT )
 881         m_graphicContext->DrawText( str, x ,y , DegToRad(angle ));
 882     else
 883         m_graphicContext->DrawText( str, x ,y , DegToRad(angle ), m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 884 }
 885
 886 void wxGCDCImpl::DoDrawText(const wxString& str, wxCoord x, wxCoord y)
 887 {
 888     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
 889
 890     if ( str.length() == 0 )
 891         return;
 892
 893     if ( !m_logicalFunctionSupported )
 894         return;
 895
 896     if ( m_backgroundMode == wxTRANSPARENT )
 897         m_graphicContext->DrawText( str, x ,y);
 898     else
 899         m_graphicContext->DrawText( str, x ,y , m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 900 }
 901
 902 bool wxGCDCImpl::CanGetTextExtent() const
 903 {
 904     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::CanGetTextExtent - invalid DC") );
 905
 906     return true;
 907 }
 908
 909 void wxGCDCImpl::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
 910                               wxCoord *descent, wxCoord *externalLeading ,
 911                               const wxFont *theFont ) const
 912 {
 913     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );
 914
 915     if ( theFont )
 916     {
 917         m_graphicContext->SetFont( *theFont, m_textForegroundColour );
 918     }
 919
 920     wxDouble h , d , e , w;
 921
 922     m_graphicContext->GetTextExtent( str, &w, &h, &d, &e );
 923
 924     if ( height )
 925         *height = (wxCoord)(h+0.5);
 926     if ( descent )
 927         *descent = (wxCoord)(d+0.5);
 928     if ( externalLeading )
 929         *externalLeading = (wxCoord)(e+0.5);
 930     if ( width )
 931         *width = (wxCoord)(w+0.5);
 932
 933     if ( theFont )
 934     {
 935         m_graphicContext->SetFont( m_font, m_textForegroundColour );
 936     }
 937 }
 938
 939 bool wxGCDCImpl::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
 940 {
 941     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::DoGetPartialTextExtents - invalid DC") );
 942     widths.Clear();
 943     widths.Add(0,text.Length());
 944     if ( text.IsEmpty() )
 945         return true;
 946
 947     wxArrayDouble widthsD;
 948
 949     m_graphicContext->GetPartialTextExtents( text, widthsD );
 950     for ( size_t i = 0; i < widths.GetCount(); ++i )
 951         widths[i] = (wxCoord)(widthsD[i] + 0.5);
 952
 953     return true;
 954 }
 955
 956 wxCoord wxGCDCImpl::GetCharWidth(void) const
 957 {
 958     wxCoord width;
 959     DoGetTextExtent( wxT("g") , &width , NULL , NULL , NULL , NULL );
 960
 961     return width;
 962 }
 963
 964 wxCoord wxGCDCImpl::GetCharHeight(void) const
 965 {
 966     wxCoord height;
 967     DoGetTextExtent( wxT("g") , NULL , &height , NULL , NULL , NULL );
 968
 969     return height;
 970 }
 971
 972 void wxGCDCImpl::Clear(void)
 973 {
 974     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::Clear - invalid DC") );
 975     // TODO better implementation / incorporate size info into wxGCDC or context
 976     m_graphicContext->SetBrush( m_backgroundBrush );
 977     wxPen p = *wxTRANSPARENT_PEN;
 978     m_graphicContext->SetPen( p );
 979     DoDrawRectangle( 0, 0, 32000 , 32000 );
 980     m_graphicContext->SetPen( m_pen );
 981     m_graphicContext->SetBrush( m_brush );
 982 }
 983
 984 void wxGCDCImpl::DoGetSize(int *width, int *height) const
 985 {
 986     *width = 10000;
 987     *height = 10000;
 988 }
 989
 990 void wxGCDCImpl::DoGradientFillLinear(const wxRect& rect,
 991                                   const wxColour& initialColour,
 992                                   const wxColour& destColour,
 993                                   wxDirection nDirection )
 994 {
 995     wxPoint start;
 996     wxPoint end;
 997     switch( nDirection)
 998     {
 999     case wxWEST :
1000         start = rect.GetRightBottom();
1001         start.x++;
1002         end = rect.GetLeftBottom();
1003         break;
1004     case wxEAST :
1005         start = rect.GetLeftBottom();
1006         end = rect.GetRightBottom();
1007         end.x++;
1008         break;
1009     case wxNORTH :
1010         start = rect.GetLeftBottom();
1011         start.y++;
1012         end = rect.GetLeftTop();
1013         break;
1014     case wxSOUTH :
1015         start = rect.GetLeftTop();
1016         end = rect.GetLeftBottom();
1017         end.y++;
1018         break;
1019     default :
1020         break;
1021     }
1022
1023     if (rect.width == 0 || rect.height == 0)
1024         return;
1025
1026     m_graphicContext->SetBrush( m_graphicContext->CreateLinearGradientBrush(
1027         start.x,start.y,end.x,end.y, initialColour, destColour));
1028     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1029     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1030     m_graphicContext->SetPen(m_pen);
1031 }
1032
1033 void wxGCDCImpl::DoGradientFillConcentric(const wxRect& rect,
1034                                       const wxColour& initialColour,
1035                                       const wxColour& destColour,
1036                                       const wxPoint& circleCenter)
1037 {
1038     //Radius
1039     wxInt32 cx = rect.GetWidth() / 2;
1040     wxInt32 cy = rect.GetHeight() / 2;
1041     wxInt32 nRadius;
1042     if (cx < cy)
1043         nRadius = cx;
1044     else
1045         nRadius = cy;
1046
1047     // make sure the background is filled (todo move into specific platform implementation ?)
1048     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1049     m_graphicContext->SetBrush( wxBrush( destColour) );
1050     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1051
1052     m_graphicContext->SetBrush( m_graphicContext->CreateRadialGradientBrush(
1053         rect.x+circleCenter.x,rect.y+circleCenter.y,
1054         rect.x+circleCenter.x,rect.y+circleCenter.y,
1055         nRadius,initialColour,destColour));
1056
1057     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1058     m_graphicContext->SetPen(m_pen);
1059 }
1060
1061 void wxGCDCImpl::DoDrawCheckMark(wxCoord x, wxCoord y,
1062                              wxCoord width, wxCoord height)
1063 {
1064     wxDCImpl::DoDrawCheckMark(x,y,width,height);
1065 }
1066
1067 #endif // wxUSE_GRAPHICS_CONTEXT