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