src/common/dcgraph.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/dcgraph.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 static wxCompositionMode TranslateRasterOp(wxRasterOperationMode function)
  57 {
  58     switch ( function )
  59     {
  60         case wxCOPY: // src
  61             // since we are supporting alpha, _OVER is closer to the intention than _SOURCE
  62             // since the latter would overwrite even when alpha is not set to opaque
  63             return wxCOMPOSITION_OVER;
  64
  65         case wxOR:         // src OR dst
  66             return wxCOMPOSITION_ADD;
  67
  68         case wxNO_OP:      // dst
  69             return wxCOMPOSITION_DEST; // ignore the source
  70
  71         case wxCLEAR:      // 0
  72             return wxCOMPOSITION_CLEAR;// clear dst
  73
  74         case wxXOR:        // src XOR dst
  75             return wxCOMPOSITION_XOR;
  76
  77         case wxAND:        // src AND dst
  78         case wxAND_INVERT: // (NOT src) AND dst
  79         case wxAND_REVERSE:// src AND (NOT dst)
  80         case wxEQUIV:      // (NOT src) XOR dst
  81         case wxINVERT:     // NOT dst
  82         case wxNAND:       // (NOT src) OR (NOT dst)
  83         case wxNOR:        // (NOT src) AND (NOT dst)
  84         case wxOR_INVERT:  // (NOT src) OR dst
  85         case wxOR_REVERSE: // src OR (NOT dst)
  86         case wxSET:        // 1
  87         case wxSRC_INVERT: // NOT src
  88             break;
  89     }
  90
  91     return wxCOMPOSITION_INVALID;
  92 }
  93
  94 //-----------------------------------------------------------------------------
  95 // wxDC bridge class
  96 //-----------------------------------------------------------------------------
  97
  98 IMPLEMENT_DYNAMIC_CLASS(wxGCDC, wxDC)
  99
 100 wxGCDC::wxGCDC(const wxWindowDC& dc) :
 101   wxDC( new wxGCDCImpl( this, dc ) )
 102 {
 103 }
 104
 105 wxGCDC::wxGCDC( const wxMemoryDC& dc) :
 106   wxDC( new wxGCDCImpl( this, dc ) )
 107 {
 108 }
 109
 110 #if wxUSE_PRINTING_ARCHITECTURE
 111 wxGCDC::wxGCDC( const wxPrinterDC& dc) :
 112   wxDC( new wxGCDCImpl( this, dc ) )
 113 {
 114 }
 115 #endif
 116
 117 #if defined(__WXMSW__) && wxUSE_ENH_METAFILE
 118 wxGCDC::wxGCDC(const wxEnhMetaFileDC& dc)
 119    : wxDC(new wxGCDCImpl(this, dc))
 120 {
 121 }
 122 #endif
 123
 124 wxGCDC::wxGCDC() :
 125   wxDC( new wxGCDCImpl( this ) )
 126 {
 127 }
 128
 129 wxGCDC::~wxGCDC()
 130 {
 131 }
 132
 133 wxGraphicsContext* wxGCDC::GetGraphicsContext() const
 134 {
 135     if (!m_pimpl) return NULL;
 136     wxGCDCImpl *gc_impl = (wxGCDCImpl*) m_pimpl;
 137     return gc_impl->GetGraphicsContext();
 138 }
 139
 140 void wxGCDC::SetGraphicsContext( wxGraphicsContext* ctx )
 141 {
 142     if (!m_pimpl) return;
 143     wxGCDCImpl *gc_impl = (wxGCDCImpl*) m_pimpl;
 144     gc_impl->SetGraphicsContext( ctx );
 145 }
 146
 147 IMPLEMENT_ABSTRACT_CLASS(wxGCDCImpl, wxDCImpl)
 148
 149 wxGCDCImpl::wxGCDCImpl( wxDC *owner ) :
 150    wxDCImpl( owner )
 151 {
 152     Init();
 153 }
 154
 155 void wxGCDCImpl::SetGraphicsContext( wxGraphicsContext* ctx )
 156 {
 157     delete m_graphicContext;
 158     m_graphicContext = ctx;
 159     if ( m_graphicContext )
 160     {
 161         m_matrixOriginal = m_graphicContext->GetTransform();
 162         m_ok = true;
 163         // apply the stored transformations to the passed in context
 164         ComputeScaleAndOrigin();
 165         m_graphicContext->SetFont( m_font , m_textForegroundColour );
 166         m_graphicContext->SetPen( m_pen );
 167         m_graphicContext->SetBrush( m_brush);
 168     }
 169 }
 170
 171 wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxWindowDC& dc ) :
 172    wxDCImpl( owner )
 173 {
 174     Init();
 175     SetGraphicsContext( wxGraphicsContext::Create(dc) );
 176     m_window = dc.GetWindow();
 177 }
 178
 179 wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxMemoryDC& dc ) :
 180    wxDCImpl( owner )
 181 {
 182     Init();
 183     wxGraphicsContext* context;
 184 #if wxUSE_CAIRO
 185     wxGraphicsRenderer* renderer = wxGraphicsRenderer::GetCairoRenderer();
 186     context = renderer->CreateContext(dc);
 187 #else
 188     context = wxGraphicsContext::Create(dc);
 189 #endif
 190
 191     SetGraphicsContext( context );
 192 }
 193
 194 #if wxUSE_PRINTING_ARCHITECTURE
 195 wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxPrinterDC& dc ) :
 196    wxDCImpl( owner )
 197 {
 198     Init();
 199     SetGraphicsContext( wxGraphicsContext::Create(dc) );
 200 }
 201 #endif
 202
 203 #if defined(__WXMSW__) && wxUSE_ENH_METAFILE
 204 wxGCDCImpl::wxGCDCImpl(wxDC *owner, const wxEnhMetaFileDC& dc)
 205    : wxDCImpl(owner)
 206 {
 207     Init();
 208     SetGraphicsContext(wxGraphicsContext::Create(dc));
 209 }
 210 #endif
 211
 212 void wxGCDCImpl::Init()
 213 {
 214     m_ok = false;
 215     m_colour = true;
 216     m_mm_to_pix_x = mm2pt;
 217     m_mm_to_pix_y = mm2pt;
 218
 219     m_pen = *wxBLACK_PEN;
 220     m_font = *wxNORMAL_FONT;
 221     m_brush = *wxWHITE_BRUSH;
 222
 223     m_graphicContext = wxGraphicsContext::Create();
 224     m_logicalFunctionSupported = true;
 225 }
 226
 227
 228 wxGCDCImpl::~wxGCDCImpl()
 229 {
 230     delete m_graphicContext;
 231 }
 232
 233 void wxGCDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y,
 234                                bool useMask )
 235 {
 236     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid DC") );
 237     wxCHECK_RET( bmp.IsOk(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid bitmap") );
 238
 239     int w = bmp.GetWidth();
 240     int h = bmp.GetHeight();
 241     if ( bmp.GetDepth() == 1 )
 242     {
 243         m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
 244         m_graphicContext->SetBrush( wxBrush( m_textBackgroundColour , wxSOLID ) );
 245         m_graphicContext->DrawRectangle( x, y, w, h );
 246         m_graphicContext->SetBrush( wxBrush( m_textForegroundColour , wxSOLID ) );
 247         m_graphicContext->DrawBitmap( bmp, x, y, w, h );
 248         m_graphicContext->SetBrush( m_graphicContext->CreateBrush(m_brush));
 249         m_graphicContext->SetPen( m_graphicContext->CreatePen(m_pen));
 250     }
 251     else // not a monochrome bitmap, handle it normally
 252     {
 253         // make a copy in case we need to remove its mask, if we don't modify
 254         // it the copy is cheap as bitmaps are reference-counted
 255         wxBitmap bmpCopy(bmp);
 256         if ( !useMask && bmp.GetMask() )
 257             bmpCopy.SetMask(NULL);
 258
 259         m_graphicContext->DrawBitmap( bmpCopy, x, y, w, h );
 260     }
 261 }
 262
 263 void wxGCDCImpl::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
 264 {
 265     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawIcon - invalid DC") );
 266     wxCHECK_RET( icon.IsOk(), wxT("wxGCDC(cg)::DoDrawIcon - invalid icon") );
 267
 268     wxCoord w = icon.GetWidth();
 269     wxCoord h = icon.GetHeight();
 270
 271     m_graphicContext->DrawIcon( icon , x, y, w, h );
 272 }
 273
 274 bool wxGCDCImpl::StartDoc( const wxString& WXUNUSED(message) )
 275 {
 276     return true;
 277 }
 278
 279 void wxGCDCImpl::EndDoc()
 280 {
 281 }
 282
 283 void wxGCDCImpl::StartPage()
 284 {
 285 }
 286
 287 void wxGCDCImpl::EndPage()
 288 {
 289 }
 290
 291 void wxGCDCImpl::Flush()
 292 {
 293     m_graphicContext->Flush();
 294 }
 295
 296 void wxGCDCImpl::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
 297 {
 298     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoSetClippingRegion - invalid DC") );
 299
 300     m_graphicContext->Clip( x, y, w, h );
 301     if ( m_clipping )
 302     {
 303         m_clipX1 = wxMax( m_clipX1, x );
 304         m_clipY1 = wxMax( m_clipY1, y );
 305         m_clipX2 = wxMin( m_clipX2, (x + w) );
 306         m_clipY2 = wxMin( m_clipY2, (y + h) );
 307     }
 308     else
 309     {
 310         m_clipping = true;
 311
 312         m_clipX1 = x;
 313         m_clipY1 = y;
 314         m_clipX2 = x + w;
 315         m_clipY2 = y + h;
 316     }
 317 }
 318
 319 void wxGCDCImpl::DoSetDeviceClippingRegion( const wxRegion &region )
 320 {
 321     // region is in device coordinates
 322     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoSetDeviceClippingRegion - invalid DC") );
 323
 324     if (region.Empty())
 325     {
 326         //DestroyClippingRegion();
 327         return;
 328     }
 329
 330     wxRegion logRegion( region );
 331     wxCoord x, y, w, h;
 332
 333     logRegion.Offset( DeviceToLogicalX(0), DeviceToLogicalY(0) );
 334     logRegion.GetBox( x, y, w, h );
 335
 336     m_graphicContext->Clip( logRegion );
 337     if ( m_clipping )
 338     {
 339         m_clipX1 = wxMax( m_clipX1, x );
 340         m_clipY1 = wxMax( m_clipY1, y );
 341         m_clipX2 = wxMin( m_clipX2, (x + w) );
 342         m_clipY2 = wxMin( m_clipY2, (y + h) );
 343     }
 344     else
 345     {
 346         m_clipping = true;
 347
 348         m_clipX1 = x;
 349         m_clipY1 = y;
 350         m_clipX2 = x + w;
 351         m_clipY2 = y + h;
 352     }
 353 }
 354
 355 void wxGCDCImpl::DestroyClippingRegion()
 356 {
 357     m_graphicContext->ResetClip();
 358     // currently the clip eg of a window extends to the area between the scrollbars
 359     // so we must explicitly make sure it only covers the area we want it to draw
 360     int width, height ;
 361     GetOwner()->GetSize( &width , &height ) ;
 362     m_graphicContext->Clip( DeviceToLogicalX(0) , DeviceToLogicalY(0) , DeviceToLogicalXRel(width), DeviceToLogicalYRel(height) );
 363
 364     m_graphicContext->SetPen( m_pen );
 365     m_graphicContext->SetBrush( m_brush );
 366
 367     m_clipping = false;
 368 }
 369
 370 void wxGCDCImpl::DoGetSizeMM( int* width, int* height ) const
 371 {
 372     int w = 0, h = 0;
 373
 374     GetOwner()->GetSize( &w, &h );
 375     if (width)
 376         *width = long( double(w) / (m_scaleX * m_mm_to_pix_x) );
 377     if (height)
 378         *height = long( double(h) / (m_scaleY * m_mm_to_pix_y) );
 379 }
 380
 381 void wxGCDCImpl::SetTextForeground( const wxColour &col )
 382 {
 383     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::SetTextForeground - invalid DC") );
 384
 385     if ( col != m_textForegroundColour )
 386     {
 387         m_textForegroundColour = col;
 388         m_graphicContext->SetFont( m_font, m_textForegroundColour );
 389     }
 390 }
 391
 392 void wxGCDCImpl::SetTextBackground( const wxColour &col )
 393 {
 394     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::SetTextBackground - invalid DC") );
 395
 396     m_textBackgroundColour = col;
 397 }
 398
 399 void wxGCDCImpl::SetMapMode( wxMappingMode mode )
 400 {
 401     switch (mode)
 402     {
 403     case wxMM_TWIPS:
 404         SetLogicalScale( twips2mm * m_mm_to_pix_x, twips2mm * m_mm_to_pix_y );
 405         break;
 406
 407     case wxMM_POINTS:
 408         SetLogicalScale( pt2mm * m_mm_to_pix_x, pt2mm * m_mm_to_pix_y );
 409         break;
 410
 411     case wxMM_METRIC:
 412         SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
 413         break;
 414
 415     case wxMM_LOMETRIC:
 416         SetLogicalScale( m_mm_to_pix_x / 10.0, m_mm_to_pix_y / 10.0 );
 417         break;
 418
 419     case wxMM_TEXT:
 420     default:
 421         SetLogicalScale( 1.0, 1.0 );
 422         break;
 423     }
 424
 425     ComputeScaleAndOrigin();
 426 }
 427
 428 wxSize wxGCDCImpl::GetPPI() const
 429 {
 430     return wxSize(72, 72);
 431 }
 432
 433 int wxGCDCImpl::GetDepth() const
 434 {
 435     return 32;
 436 }
 437
 438 void wxGCDCImpl::ComputeScaleAndOrigin()
 439 {
 440     wxDCImpl::ComputeScaleAndOrigin();
 441
 442     if ( m_graphicContext )
 443     {
 444         m_matrixCurrent = m_graphicContext->CreateMatrix();
 445
 446         // the logical origin sets the origin to have new coordinates
 447         m_matrixCurrent.Translate( m_deviceOriginX - m_logicalOriginX * m_signX * m_scaleX,
 448                                    m_deviceOriginY-m_logicalOriginY * m_signY * m_scaleY);
 449
 450         m_matrixCurrent.Scale( m_scaleX * m_signX, m_scaleY * m_signY );
 451
 452         m_graphicContext->SetTransform( m_matrixOriginal );
 453         m_graphicContext->ConcatTransform( m_matrixCurrent );
 454     }
 455 }
 456
 457 void wxGCDCImpl::SetPalette( const wxPalette& WXUNUSED(palette) )
 458 {
 459
 460 }
 461
 462 void wxGCDCImpl::SetBackgroundMode( int mode )
 463 {
 464     m_backgroundMode = mode;
 465 }
 466
 467 void wxGCDCImpl::SetFont( const wxFont &font )
 468 {
 469     m_font = font;
 470     if ( m_graphicContext )
 471     {
 472         wxFont f = font;
 473         if ( f.IsOk() )
 474             f.SetPointSize( /*LogicalToDeviceYRel*/(font.GetPointSize()));
 475         m_graphicContext->SetFont( f, m_textForegroundColour );
 476     }
 477 }
 478
 479 void wxGCDCImpl::SetPen( const wxPen &pen )
 480 {
 481     if ( m_pen == pen )
 482         return;
 483
 484     m_pen = pen;
 485     if ( m_graphicContext )
 486     {
 487         m_graphicContext->SetPen( m_pen );
 488     }
 489 }
 490
 491 void wxGCDCImpl::SetBrush( const wxBrush &brush )
 492 {
 493     if (m_brush == brush)
 494         return;
 495
 496     m_brush = brush;
 497     if ( m_graphicContext )
 498     {
 499         m_graphicContext->SetBrush( m_brush );
 500     }
 501 }
 502
 503 void wxGCDCImpl::SetBackground( const wxBrush &brush )
 504 {
 505     if (m_backgroundBrush == brush)
 506         return;
 507
 508     m_backgroundBrush = brush;
 509     if (!m_backgroundBrush.IsOk())
 510         return;
 511 }
 512
 513 void wxGCDCImpl::SetLogicalFunction( wxRasterOperationMode function )
 514 {
 515     if (m_logicalFunction == function)
 516         return;
 517
 518     m_logicalFunction = function;
 519
 520     wxCompositionMode mode = TranslateRasterOp( function );
 521     m_logicalFunctionSupported = mode != wxCOMPOSITION_INVALID;
 522     if (m_logicalFunctionSupported)
 523         m_logicalFunctionSupported = m_graphicContext->SetCompositionMode(mode);
 524
 525     if ( function == wxXOR )
 526         m_graphicContext->SetAntialiasMode(wxANTIALIAS_NONE);
 527     else
 528         m_graphicContext->SetAntialiasMode(wxANTIALIAS_DEFAULT);
 529 }
 530
 531 bool wxGCDCImpl::DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 532                              const wxColour& WXUNUSED(col),
 533                              wxFloodFillStyle WXUNUSED(style))
 534 {
 535     return false;
 536 }
 537
 538 bool wxGCDCImpl::DoGetPixel( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxColour *WXUNUSED(col) ) const
 539 {
 540     //  wxCHECK_MSG( 0 , false, wxT("wxGCDC(cg)::DoGetPixel - not implemented") );
 541     return false;
 542 }
 543
 544 void wxGCDCImpl::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 545 {
 546     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLine - invalid DC") );
 547
 548     if ( !m_logicalFunctionSupported )
 549         return;
 550
 551     m_graphicContext->StrokeLine(x1,y1,x2,y2);
 552
 553     CalcBoundingBox(x1, y1);
 554     CalcBoundingBox(x2, y2);
 555 }
 556
 557 void wxGCDCImpl::DoCrossHair( wxCoord x, wxCoord y )
 558 {
 559     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoCrossHair - invalid DC") );
 560
 561     if ( !m_logicalFunctionSupported )
 562         return;
 563
 564     int w = 0, h = 0;
 565
 566     GetOwner()->GetSize( &w, &h );
 567
 568     m_graphicContext->StrokeLine(0,y,w,y);
 569     m_graphicContext->StrokeLine(x,0,x,h);
 570
 571     CalcBoundingBox(0, 0);
 572     CalcBoundingBox(0+w, 0+h);
 573 }
 574
 575 void wxGCDCImpl::DoDrawArc( wxCoord x1, wxCoord y1,
 576                         wxCoord x2, wxCoord y2,
 577                         wxCoord xc, wxCoord yc )
 578 {
 579     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawArc - invalid DC") );
 580
 581     if ( !m_logicalFunctionSupported )
 582         return;
 583
 584     double dx = x1 - xc;
 585     double dy = y1 - yc;
 586     double radius = sqrt((double)(dx * dx + dy * dy));
 587     wxCoord rad = (wxCoord)radius;
 588     double sa, ea;
 589     if (x1 == x2 && y1 == y2)
 590     {
 591         sa = 0.0;
 592         ea = 360.0;
 593     }
 594     else if (radius == 0.0)
 595     {
 596         sa = ea = 0.0;
 597     }
 598     else
 599     {
 600         sa = (x1 - xc == 0) ?
 601      (y1 - yc < 0) ? 90.0 : -90.0 :
 602              -atan2(double(y1 - yc), double(x1 - xc)) * RAD2DEG;
 603         ea = (x2 - xc == 0) ?
 604      (y2 - yc < 0) ? 90.0 : -90.0 :
 605              -atan2(double(y2 - yc), double(x2 - xc)) * RAD2DEG;
 606     }
 607
 608     bool fill = m_brush.GetStyle() != wxTRANSPARENT;
 609
 610     wxGraphicsPath path = m_graphicContext->CreatePath();
 611     if ( fill && ((x1!=x2)||(y1!=y2)) )
 612         path.MoveToPoint( xc, yc );
 613     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 614     // get clockwise angles
 615     path.AddArc( xc, yc , rad , DegToRad(-sa) , DegToRad(-ea), false );
 616     if ( fill && ((x1!=x2)||(y1!=y2)) )
 617         path.AddLineToPoint( xc, yc );
 618     m_graphicContext->DrawPath(path);
 619 }
 620
 621 void wxGCDCImpl::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 622                                 double sa, double ea )
 623 {
 624     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawEllipticArc - invalid DC") );
 625
 626     if ( !m_logicalFunctionSupported )
 627         return;
 628
 629     m_graphicContext->PushState();
 630     m_graphicContext->Translate(x+w/2.0,y+h/2.0);
 631     wxDouble factor = ((wxDouble) w) / h;
 632     m_graphicContext->Scale( factor , 1.0);
 633
 634     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 635     // get clockwise angles
 636     if ( m_brush.GetStyle() != wxTRANSPARENT )
 637     {
 638         wxGraphicsPath path = m_graphicContext->CreatePath();
 639         path.MoveToPoint( 0, 0 );
 640         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 641         path.AddLineToPoint( 0, 0 );
 642         m_graphicContext->FillPath( path );
 643
 644         path = m_graphicContext->CreatePath();
 645         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 646         m_graphicContext->StrokePath( path );
 647     }
 648     else
 649     {
 650         wxGraphicsPath path = m_graphicContext->CreatePath();
 651         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 652         m_graphicContext->DrawPath( path );
 653     }
 654
 655     m_graphicContext->PopState();
 656 }
 657
 658 void wxGCDCImpl::DoDrawPoint( wxCoord x, wxCoord y )
 659 {
 660     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawPoint - invalid DC") );
 661
 662     DoDrawLine( x , y , x + 1 , y + 1 );
 663 }
 664
 665 void wxGCDCImpl::DoDrawLines(int n, wxPoint points[],
 666                          wxCoord xoffset, wxCoord yoffset)
 667 {
 668     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLines - invalid DC") );
 669
 670     if ( !m_logicalFunctionSupported )
 671         return;
 672
 673     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n];
 674     for( int i = 0; i < n; ++i)
 675     {
 676         pointsD[i].m_x = points[i].x + xoffset;
 677         pointsD[i].m_y = points[i].y + yoffset;
 678     }
 679
 680     m_graphicContext->StrokeLines( n , pointsD);
 681     delete[] pointsD;
 682 }
 683
 684 #if wxUSE_SPLINES
 685 void wxGCDCImpl::DoDrawSpline(const wxPointList *points)
 686 {
 687     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawSpline - invalid DC") );
 688
 689     if ( !m_logicalFunctionSupported )
 690         return;
 691
 692     wxGraphicsPath path = m_graphicContext->CreatePath();
 693
 694     wxPointList::compatibility_iterator node = points->GetFirst();
 695     if ( !node )
 696         // empty list
 697         return;
 698
 699     wxPoint *p = node->GetData();
 700
 701     wxCoord x1 = p->x;
 702     wxCoord y1 = p->y;
 703
 704     node = node->GetNext();
 705     p = node->GetData();
 706
 707     wxCoord x2 = p->x;
 708     wxCoord y2 = p->y;
 709     wxCoord cx1 = ( x1 + x2 ) / 2;
 710     wxCoord cy1 = ( y1 + y2 ) / 2;
 711
 712     path.MoveToPoint( x1 , y1 );
 713     path.AddLineToPoint( cx1 , cy1 );
 714 #if !wxUSE_STD_CONTAINERS
 715
 716     while ((node = node->GetNext()) != NULL)
 717 #else
 718
 719     while ((node = node->GetNext()))
 720 #endif // !wxUSE_STD_CONTAINERS
 721
 722     {
 723         p = node->GetData();
 724         x1 = x2;
 725         y1 = y2;
 726         x2 = p->x;
 727         y2 = p->y;
 728         wxCoord cx4 = (x1 + x2) / 2;
 729         wxCoord cy4 = (y1 + y2) / 2;
 730
 731         path.AddQuadCurveToPoint(x1 , y1 ,cx4 , cy4 );
 732
 733         cx1 = cx4;
 734         cy1 = cy4;
 735     }
 736
 737     path.AddLineToPoint( x2 , y2 );
 738
 739     m_graphicContext->StrokePath( path );
 740 }
 741 #endif // wxUSE_SPLINES
 742
 743 void wxGCDCImpl::DoDrawPolygon( int n, wxPoint points[],
 744                                 wxCoord xoffset, wxCoord yoffset,
 745                                 wxPolygonFillMode fillStyle )
 746 {
 747     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawPolygon - invalid DC") );
 748
 749     if ( n <= 0 || (m_brush.GetStyle() == wxTRANSPARENT && m_pen.GetStyle() == wxTRANSPARENT ) )
 750         return;
 751     if ( !m_logicalFunctionSupported )
 752         return;
 753
 754     bool closeIt = false;
 755     if (points[n-1] != points[0])
 756         closeIt = true;
 757
 758     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n+(closeIt?1:0)];
 759     for( int i = 0; i < n; ++i)
 760     {
 761         pointsD[i].m_x = points[i].x + xoffset;
 762         pointsD[i].m_y = points[i].y + yoffset;
 763     }
 764     if ( closeIt )
 765         pointsD[n] = pointsD[0];
 766
 767     m_graphicContext->DrawLines( n+(closeIt?1:0) , pointsD, fillStyle);
 768     delete[] pointsD;
 769 }
 770
 771 void wxGCDCImpl::DoDrawPolyPolygon(int n,
 772                                int count[],
 773                                wxPoint points[],
 774                                wxCoord xoffset,
 775                                wxCoord yoffset,
 776                                wxPolygonFillMode fillStyle)
 777 {
 778     wxASSERT(n > 1);
 779     wxGraphicsPath path = m_graphicContext->CreatePath();
 780
 781     int i = 0;
 782     for ( int j = 0; j < n; ++j)
 783     {
 784         wxPoint start = points[i];
 785         path.MoveToPoint( start.x+ xoffset, start.y+ yoffset);
 786         ++i;
 787         int l = count[j];
 788         for ( int k = 1; k < l; ++k)
 789         {
 790             path.AddLineToPoint( points[i].x+ xoffset, points[i].y+ yoffset);
 791             ++i;
 792         }
 793         // close the polygon
 794         if ( start != points[i-1])
 795             path.AddLineToPoint( start.x+ xoffset, start.y+ yoffset);
 796     }
 797     m_graphicContext->DrawPath( path , fillStyle);
 798 }
 799
 800 void wxGCDCImpl::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 801 {
 802     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRectangle - invalid DC") );
 803
 804     if ( !m_logicalFunctionSupported )
 805         return;
 806
 807     // CMB: draw nothing if transformed w or h is 0
 808     if (w == 0 || h == 0)
 809         return;
 810
 811     if ( m_graphicContext->ShouldOffset() )
 812     {
 813         // if we are offsetting the entire rectangle is moved 0.5, so the
 814         // border line gets off by 1
 815         w -= 1;
 816         h -= 1;
 817     }
 818     m_graphicContext->DrawRectangle(x,y,w,h);
 819 }
 820
 821 void wxGCDCImpl::DoDrawRoundedRectangle(wxCoord x, wxCoord y,
 822                                     wxCoord w, wxCoord h,
 823                                     double radius)
 824 {
 825     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRoundedRectangle - invalid DC") );
 826
 827     if ( !m_logicalFunctionSupported )
 828         return;
 829
 830     if (radius < 0.0)
 831         radius = - radius * ((w < h) ? w : h);
 832
 833     // CMB: draw nothing if transformed w or h is 0
 834     if (w == 0 || h == 0)
 835         return;
 836
 837     if ( m_graphicContext->ShouldOffset() )
 838     {
 839         // if we are offsetting the entire rectangle is moved 0.5, so the
 840         // border line gets off by 1
 841         w -= 1;
 842         h -= 1;
 843     }
 844     m_graphicContext->DrawRoundedRectangle( x,y,w,h,radius);
 845 }
 846
 847 void wxGCDCImpl::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
 848 {
 849     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawEllipse - invalid DC") );
 850
 851     if ( !m_logicalFunctionSupported )
 852         return;
 853
 854     if ( m_graphicContext->ShouldOffset() )
 855     {
 856         // if we are offsetting the entire rectangle is moved 0.5, so the
 857         // border line gets off by 1
 858         w -= 1;
 859         h -= 1;
 860     }
 861     m_graphicContext->DrawEllipse(x,y,w,h);
 862 }
 863
 864 bool wxGCDCImpl::CanDrawBitmap() const
 865 {
 866     return true;
 867 }
 868
 869 bool wxGCDCImpl::DoBlit(
 870     wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 871     wxDC *source, wxCoord xsrc, wxCoord ysrc,
 872     wxRasterOperationMode logical_func , bool useMask,
 873     wxCoord xsrcMask, wxCoord ysrcMask )
 874 {
 875     return DoStretchBlit( xdest, ydest, width, height,
 876         source, xsrc, ysrc, width, height, logical_func, useMask,
 877         xsrcMask,ysrcMask );
 878 }
 879
 880 bool wxGCDCImpl::DoStretchBlit(
 881     wxCoord xdest, wxCoord ydest, wxCoord dstWidth, wxCoord dstHeight,
 882     wxDC *source, wxCoord xsrc, wxCoord ysrc, wxCoord srcWidth, wxCoord srcHeight,
 883     wxRasterOperationMode logical_func , bool useMask,
 884     wxCoord xsrcMask, wxCoord ysrcMask )
 885 {
 886     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid DC") );
 887     wxCHECK_MSG( source->IsOk(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid source DC") );
 888
 889     if ( logical_func == wxNO_OP )
 890         return true;
 891
 892     wxCompositionMode mode = TranslateRasterOp(logical_func);
 893     if ( mode == wxCOMPOSITION_INVALID )
 894     {
 895         wxFAIL_MSG( wxT("Blitting is not supported with this logical operation.") );
 896         return false;
 897     }
 898
 899     bool retval = true;
 900
 901     wxCompositionMode formerMode = m_graphicContext->GetCompositionMode();
 902     if (m_graphicContext->SetCompositionMode(mode))
 903     {
 904         wxAntialiasMode formerAa = m_graphicContext->GetAntialiasMode();
 905         if (mode == wxCOMPOSITION_XOR)
 906         {
 907             m_graphicContext->SetAntialiasMode(wxANTIALIAS_NONE);
 908         }
 909
 910         if (xsrcMask == -1 && ysrcMask == -1)
 911         {
 912             xsrcMask = xsrc;
 913             ysrcMask = ysrc;
 914         }
 915
 916         wxRect subrect(source->LogicalToDeviceX(xsrc),
 917                        source->LogicalToDeviceY(ysrc),
 918                        source->LogicalToDeviceXRel(srcWidth),
 919                        source->LogicalToDeviceYRel(srcHeight));
 920
 921         // if needed clip the subrect down to the size of the source DC
 922         wxCoord sw, sh;
 923         source->GetSize(&sw, &sh);
 924         sw = source->LogicalToDeviceXRel(sw);
 925         sh = source->LogicalToDeviceYRel(sh);
 926         if (subrect.x + subrect.width > sw)
 927             subrect.width = sw - subrect.x;
 928         if (subrect.y + subrect.height > sh)
 929             subrect.height = sh - subrect.y;
 930
 931         wxBitmap blit = source->GetAsBitmap( &subrect );
 932
 933         if ( blit.IsOk() )
 934         {
 935             if ( !useMask && blit.GetMask() )
 936                 blit.SetMask(NULL);
 937
 938             m_graphicContext->DrawBitmap( blit, xdest, ydest,
 939                                           dstWidth, dstHeight);
 940         }
 941         else
 942         {
 943             wxFAIL_MSG( wxT("Cannot Blit. Unable to get contents of DC as bitmap.") );
 944             retval = false;
 945         }
 946
 947         if (mode == wxCOMPOSITION_XOR)
 948         {
 949             m_graphicContext->SetAntialiasMode(formerAa);
 950         }
 951     }
 952     // reset composition
 953     m_graphicContext->SetCompositionMode(formerMode);
 954
 955     return retval;
 956 }
 957
 958 void wxGCDCImpl::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
 959                                double angle)
 960 {
 961     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
 962
 963     if ( str.empty() )
 964         return;
 965     if ( !m_logicalFunctionSupported )
 966         return;
 967
 968     if ( m_backgroundMode == wxTRANSPARENT )
 969         m_graphicContext->DrawText( str, x ,y , DegToRad(angle ));
 970     else
 971         m_graphicContext->DrawText( str, x ,y , DegToRad(angle ), m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 972 }
 973
 974 void wxGCDCImpl::DoDrawText(const wxString& str, wxCoord x, wxCoord y)
 975 {
 976     // For compatibility with other ports (notably wxGTK) and because it's
 977     // genuinely useful, we allow passing multiline strings to DrawText().
 978     // However there is no native OSX function to draw them directly so we
 979     // instead reuse the generic DrawLabel() method to render them. Of course,
 980     // DrawLabel() itself will call back to us but with single line strings
 981     // only so there won't be any infinite recursion here.
 982     if ( str.find('\n') != wxString::npos )
 983     {
 984         GetOwner()->DrawLabel(str, wxRect(x, y, 0, 0));
 985         return;
 986     }
 987
 988     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawText - invalid DC") );
 989
 990     if ( str.empty() )
 991         return;
 992
 993     if ( !m_logicalFunctionSupported )
 994         return;
 995
 996     if ( m_backgroundMode == wxTRANSPARENT )
 997         m_graphicContext->DrawText( str, x ,y);
 998     else
 999         m_graphicContext->DrawText( str, x ,y , m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
1000 }
1001
1002 bool wxGCDCImpl::CanGetTextExtent() const
1003 {
1004     wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::CanGetTextExtent - invalid DC") );
1005
1006     return true;
1007 }
1008
1009 void wxGCDCImpl::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
1010                               wxCoord *descent, wxCoord *externalLeading ,
1011                               const wxFont *theFont ) const
1012 {
1013     wxCHECK_RET( m_graphicContext, wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );
1014
1015     if ( theFont )
1016     {
1017         m_graphicContext->SetFont( *theFont, m_textForegroundColour );
1018     }
1019
1020     wxDouble h , d , e , w;
1021
1022     m_graphicContext->GetTextExtent( str, &w, &h, &d, &e );
1023
1024     if ( height )
1025         *height = (wxCoord)(h+0.5);
1026     if ( descent )
1027         *descent = (wxCoord)(d+0.5);
1028     if ( externalLeading )
1029         *externalLeading = (wxCoord)(e+0.5);
1030     if ( width )
1031         *width = (wxCoord)(w+0.5);
1032
1033     if ( theFont )
1034     {
1035         m_graphicContext->SetFont( m_font, m_textForegroundColour );
1036     }
1037 }
1038
1039 bool wxGCDCImpl::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
1040 {
1041     wxCHECK_MSG( m_graphicContext, false, wxT("wxGCDC(cg)::DoGetPartialTextExtents - invalid DC") );
1042     widths.Clear();
1043     widths.Add(0,text.Length());
1044     if ( text.IsEmpty() )
1045         return true;
1046
1047     wxArrayDouble widthsD;
1048
1049     m_graphicContext->GetPartialTextExtents( text, widthsD );
1050     for ( size_t i = 0; i < widths.GetCount(); ++i )
1051         widths[i] = (wxCoord)(widthsD[i] + 0.5);
1052
1053     return true;
1054 }
1055
1056 wxCoord wxGCDCImpl::GetCharWidth(void) const
1057 {
1058     wxCoord width;
1059     DoGetTextExtent( wxT("g") , &width , NULL , NULL , NULL , NULL );
1060
1061     return width;
1062 }
1063
1064 wxCoord wxGCDCImpl::GetCharHeight(void) const
1065 {
1066     wxCoord height;
1067     DoGetTextExtent( wxT("g") , NULL , &height , NULL , NULL , NULL );
1068
1069     return height;
1070 }
1071
1072 void wxGCDCImpl::Clear(void)
1073 {
1074     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::Clear - invalid DC") );
1075     // TODO better implementation / incorporate size info into wxGCDC or context
1076     m_graphicContext->SetBrush( m_backgroundBrush );
1077     wxPen p = *wxTRANSPARENT_PEN;
1078     m_graphicContext->SetPen( p );
1079     wxCompositionMode formerMode = m_graphicContext->GetCompositionMode();
1080     m_graphicContext->SetCompositionMode(wxCOMPOSITION_SOURCE);
1081     DoDrawRectangle( 0, 0, 32000 , 32000 );
1082     m_graphicContext->SetCompositionMode(formerMode);
1083     m_graphicContext->SetPen( m_pen );
1084     m_graphicContext->SetBrush( m_brush );
1085 }
1086
1087 void wxGCDCImpl::DoGetSize(int *width, int *height) const
1088 {
1089     wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoGetSize - invalid DC") );
1090     wxDouble w,h;
1091     m_graphicContext->GetSize( &w, &h );
1092     if ( height )
1093         *height = (int) (h+0.5);
1094     if ( width )
1095         *width = (int) (w+0.5);
1096 }
1097
1098 void wxGCDCImpl::DoGradientFillLinear(const wxRect& rect,
1099                                   const wxColour& initialColour,
1100                                   const wxColour& destColour,
1101                                   wxDirection nDirection )
1102 {
1103     wxPoint start;
1104     wxPoint end;
1105     switch( nDirection)
1106     {
1107     case wxWEST :
1108         start = rect.GetRightBottom();
1109         start.x++;
1110         end = rect.GetLeftBottom();
1111         break;
1112     case wxEAST :
1113         start = rect.GetLeftBottom();
1114         end = rect.GetRightBottom();
1115         end.x++;
1116         break;
1117     case wxNORTH :
1118         start = rect.GetLeftBottom();
1119         start.y++;
1120         end = rect.GetLeftTop();
1121         break;
1122     case wxSOUTH :
1123         start = rect.GetLeftTop();
1124         end = rect.GetLeftBottom();
1125         end.y++;
1126         break;
1127     default :
1128         break;
1129     }
1130
1131     if (rect.width == 0 || rect.height == 0)
1132         return;
1133
1134     m_graphicContext->SetBrush( m_graphicContext->CreateLinearGradientBrush(
1135         start.x,start.y,end.x,end.y, initialColour, destColour));
1136     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1137     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1138     m_graphicContext->SetPen(m_pen);
1139 }
1140
1141 void wxGCDCImpl::DoGradientFillConcentric(const wxRect& rect,
1142                                       const wxColour& initialColour,
1143                                       const wxColour& destColour,
1144                                       const wxPoint& circleCenter)
1145 {
1146     //Radius
1147     wxInt32 cx = rect.GetWidth() / 2;
1148     wxInt32 cy = rect.GetHeight() / 2;
1149     wxInt32 nRadius;
1150     if (cx < cy)
1151         nRadius = cx;
1152     else
1153         nRadius = cy;
1154
1155     // make sure the background is filled (todo move into specific platform implementation ?)
1156     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1157     m_graphicContext->SetBrush( wxBrush( destColour) );
1158     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1159
1160     m_graphicContext->SetBrush( m_graphicContext->CreateRadialGradientBrush(
1161         rect.x+circleCenter.x,rect.y+circleCenter.y,
1162         rect.x+circleCenter.x,rect.y+circleCenter.y,
1163         nRadius,initialColour,destColour));
1164
1165     m_graphicContext->DrawRectangle(rect.x,rect.y,rect.width,rect.height);
1166     m_graphicContext->SetPen(m_pen);
1167 }
1168
1169 void wxGCDCImpl::DoDrawCheckMark(wxCoord x, wxCoord y,
1170                              wxCoord width, wxCoord height)
1171 {
1172     wxDCImpl::DoDrawCheckMark(x,y,width,height);
1173 }
1174
1175 #ifdef __WXMSW__
1176 wxRect wxGCDCImpl::MSWApplyGDIPlusTransform(const wxRect& r) const
1177 {
1178     wxGraphicsContext* const gc = GetGraphicsContext();
1179     wxCHECK_MSG( gc, r, wxT("Invalid wxGCDC") );
1180
1181     double x = 0,
1182            y = 0;
1183     gc->GetTransform().TransformPoint(&x, &y);
1184
1185     wxRect rect(r);
1186     rect.Offset(x, y);
1187
1188     return rect;
1189 }
1190 #endif // __WXMSW__
1191
1192 #endif // wxUSE_GRAPHICS_CONTEXT