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