src/mac/carbon/graphics.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/carbon/dccg.cpp
   3 // Purpose:     wxDC class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #include "wx/graphics.h"
  15
  16 #ifndef WX_PRECOMP
  17     #include "wx/dcclient.h"
  18     #include "wx/dcmemory.h"
  19     #include "wx/log.h"
  20     #include "wx/region.h"
  21     #include "wx/image.h"
  22     #include "wx/icon.h"
  23 #endif
  24
  25 #include "wx/mac/uma.h"
  26
  27 #ifdef __MSL__
  28     #if __MSL__ >= 0x6000
  29         #include "math.h"
  30         // in case our functions were defined outside std, we make it known all the same
  31         namespace std { }
  32         using namespace std;
  33     #endif
  34 #endif
  35
  36 #include "wx/mac/private.h"
  37
  38 //-----------------------------------------------------------------------------
  39 // constants
  40 //-----------------------------------------------------------------------------
  41
  42 #if !defined( __DARWIN__ ) || defined(__MWERKS__)
  43 #ifndef M_PI
  44 const double M_PI = 3.14159265358979;
  45 #endif
  46 #endif
  47
  48 static const double RAD2DEG = 180.0 / M_PI;
  49
  50 //
  51 // Pen, Brushes and Fonts
  52 //
  53
  54 #pragma mark -
  55 #pragma mark wxMacCoreGraphicsPattern, ImagePattern, HatchPattern classes
  56
  57 OSStatus wxMacDrawCGImage(
  58                   CGContextRef    inContext,
  59                   const HIRect *  inBounds,
  60                   CGImageRef      inImage)
  61 {
  62 #ifdef __LP64__
  63     // todo flip
  64     CGContextDrawImage(inContext, *inBounds, inImage );
  65     return noErr;
  66 #else
  67     return HIViewDrawCGImage( inContext, inBounds, inImage );
  68 #endif
  69 }
  70
  71 // CGPattern wrapper class: always allocate on heap, never call destructor
  72
  73 class wxMacCoreGraphicsPattern
  74 {
  75 public :
  76     wxMacCoreGraphicsPattern() {}
  77
  78     // is guaranteed to be called only with a non-Null CGContextRef
  79     virtual void Render( CGContextRef ctxRef ) = 0;
  80
  81     operator CGPatternRef() const { return m_patternRef; }
  82
  83 protected :
  84     virtual ~wxMacCoreGraphicsPattern()
  85     {
  86         // as this is called only when the m_patternRef is been released;
  87         // don't release it again
  88     }
  89
  90     static void _Render( void *info, CGContextRef ctxRef )
  91     {
  92         wxMacCoreGraphicsPattern* self = (wxMacCoreGraphicsPattern*) info;
  93         if ( self && ctxRef )
  94             self->Render( ctxRef );
  95     }
  96
  97     static void _Dispose( void *info )
  98     {
  99         wxMacCoreGraphicsPattern* self = (wxMacCoreGraphicsPattern*) info;
 100         delete self;
 101     }
 102
 103     CGPatternRef m_patternRef;
 104
 105     static const CGPatternCallbacks ms_Callbacks;
 106 };
 107
 108 const CGPatternCallbacks wxMacCoreGraphicsPattern::ms_Callbacks = { 0, &wxMacCoreGraphicsPattern::_Render, &wxMacCoreGraphicsPattern::_Dispose };
 109
 110 class ImagePattern : public wxMacCoreGraphicsPattern
 111 {
 112 public :
 113     ImagePattern( const wxBitmap* bmp , const CGAffineTransform& transform )
 114     {
 115         wxASSERT( bmp && bmp->Ok() );
 116
 117         Init( (CGImageRef) bmp->CreateCGImage() , transform );
 118     }
 119
 120     // ImagePattern takes ownership of CGImageRef passed in
 121     ImagePattern( CGImageRef image , const CGAffineTransform& transform )
 122     {
 123         if ( image )
 124             CFRetain( image );
 125
 126         Init( image , transform );
 127     }
 128
 129     virtual void Render( CGContextRef ctxRef )
 130     {
 131         if (m_image != NULL)
 132             wxMacDrawCGImage( ctxRef, &m_imageBounds, m_image );
 133     }
 134
 135 protected :
 136     void Init( CGImageRef image, const CGAffineTransform& transform )
 137     {
 138         m_image = image;
 139         if ( m_image )
 140         {
 141             m_imageBounds = CGRectMake( 0.0, 0.0, (CGFloat)CGImageGetWidth( m_image ), (CGFloat)CGImageGetHeight( m_image ) );
 142             m_patternRef = CGPatternCreate(
 143                 this , m_imageBounds, transform ,
 144                 m_imageBounds.size.width, m_imageBounds.size.height,
 145                 kCGPatternTilingNoDistortion, true , &wxMacCoreGraphicsPattern::ms_Callbacks );
 146         }
 147     }
 148
 149     virtual ~ImagePattern()
 150     {
 151         if ( m_image )
 152             CGImageRelease( m_image );
 153     }
 154
 155     CGImageRef m_image;
 156     CGRect m_imageBounds;
 157 };
 158
 159 class HatchPattern : public wxMacCoreGraphicsPattern
 160 {
 161 public :
 162     HatchPattern( int hatchstyle, const CGAffineTransform& transform )
 163     {
 164         m_hatch = hatchstyle;
 165         m_imageBounds = CGRectMake( 0.0, 0.0, 8.0 , 8.0 );
 166         m_patternRef = CGPatternCreate(
 167             this , m_imageBounds, transform ,
 168             m_imageBounds.size.width, m_imageBounds.size.height,
 169             kCGPatternTilingNoDistortion, false , &wxMacCoreGraphicsPattern::ms_Callbacks );
 170     }
 171
 172     void StrokeLineSegments( CGContextRef ctxRef , const CGPoint pts[] , size_t count )
 173     {
 174         CGContextStrokeLineSegments( ctxRef , pts , count );
 175     }
 176
 177     virtual void Render( CGContextRef ctxRef )
 178     {
 179         switch ( m_hatch )
 180         {
 181             case wxBDIAGONAL_HATCH :
 182                 {
 183                     CGPoint pts[] =
 184                     {
 185                     { 8.0 , 0.0 } , { 0.0 , 8.0 }
 186                     };
 187                     StrokeLineSegments( ctxRef , pts , 2 );
 188                 }
 189                 break;
 190
 191             case wxCROSSDIAG_HATCH :
 192                 {
 193                     CGPoint pts[] =
 194                     {
 195                         { 0.0 , 0.0 } , { 8.0 , 8.0 } ,
 196                         { 8.0 , 0.0 } , { 0.0 , 8.0 }
 197                     };
 198                     StrokeLineSegments( ctxRef , pts , 4 );
 199                 }
 200                 break;
 201
 202             case wxFDIAGONAL_HATCH :
 203                 {
 204                     CGPoint pts[] =
 205                     {
 206                     { 0.0 , 0.0 } , { 8.0 , 8.0 }
 207                     };
 208                     StrokeLineSegments( ctxRef , pts , 2 );
 209                 }
 210                 break;
 211
 212             case wxCROSS_HATCH :
 213                 {
 214                     CGPoint pts[] =
 215                     {
 216                     { 0.0 , 4.0 } , { 8.0 , 4.0 } ,
 217                     { 4.0 , 0.0 } , { 4.0 , 8.0 } ,
 218                     };
 219                     StrokeLineSegments( ctxRef , pts , 4 );
 220                 }
 221                 break;
 222
 223             case wxHORIZONTAL_HATCH :
 224                 {
 225                     CGPoint pts[] =
 226                     {
 227                     { 0.0 , 4.0 } , { 8.0 , 4.0 } ,
 228                     };
 229                     StrokeLineSegments( ctxRef , pts , 2 );
 230                 }
 231                 break;
 232
 233             case wxVERTICAL_HATCH :
 234                 {
 235                     CGPoint pts[] =
 236                     {
 237                     { 4.0 , 0.0 } , { 4.0 , 8.0 } ,
 238                     };
 239                     StrokeLineSegments( ctxRef , pts , 2 );
 240                 }
 241                 break;
 242
 243             default:
 244                 break;
 245         }
 246     }
 247
 248 protected :
 249     virtual ~HatchPattern() {}
 250
 251     CGRect      m_imageBounds;
 252     int         m_hatch;
 253 };
 254
 255 class wxMacCoreGraphicsPenData : public wxGraphicsObjectRefData
 256 {
 257 public:
 258     wxMacCoreGraphicsPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 259     ~wxMacCoreGraphicsPenData();
 260
 261     void Init();
 262     virtual void Apply( wxGraphicsContext* context );
 263     virtual wxDouble GetWidth() { return m_width; }
 264
 265 protected :
 266     CGLineCap m_cap;
 267     wxMacCFRefHolder<CGColorRef> m_color;
 268     wxMacCFRefHolder<CGColorSpaceRef> m_colorSpace;
 269
 270     CGLineJoin m_join;
 271     CGFloat m_width;
 272
 273     int m_count;
 274     const CGFloat *m_lengths;
 275     CGFloat *m_userLengths;
 276
 277
 278     bool m_isPattern;
 279     wxMacCFRefHolder<CGPatternRef> m_pattern;
 280     CGFloat* m_patternColorComponents;
 281 };
 282
 283 wxMacCoreGraphicsPenData::wxMacCoreGraphicsPenData( wxGraphicsRenderer* renderer, const wxPen &pen ) :
 284     wxGraphicsObjectRefData( renderer )
 285 {
 286     Init();
 287
 288     CGFloat components[4] = { pen.GetColour().Red() / 255.0 , pen.GetColour().Green() / 255.0 ,
 289             pen.GetColour().Blue() / 255.0 , pen.GetColour().Alpha() / 255.0 } ;
 290     m_color.Set( CGColorCreate( wxMacGetGenericRGBColorSpace() , components ) ) ;
 291
 292     // TODO: * m_dc->m_scaleX
 293     m_width = pen.GetWidth();
 294     if (m_width <= 0.0)
 295         m_width = 0.1;
 296
 297     switch ( pen.GetCap() )
 298     {
 299         case wxCAP_ROUND :
 300             m_cap = kCGLineCapRound;
 301             break;
 302
 303         case wxCAP_PROJECTING :
 304             m_cap = kCGLineCapSquare;
 305             break;
 306
 307         case wxCAP_BUTT :
 308             m_cap = kCGLineCapButt;
 309             break;
 310
 311         default :
 312             m_cap = kCGLineCapButt;
 313             break;
 314     }
 315
 316     switch ( pen.GetJoin() )
 317     {
 318         case wxJOIN_BEVEL :
 319             m_join = kCGLineJoinBevel;
 320             break;
 321
 322         case wxJOIN_MITER :
 323             m_join = kCGLineJoinMiter;
 324             break;
 325
 326         case wxJOIN_ROUND :
 327             m_join = kCGLineJoinRound;
 328             break;
 329
 330         default :
 331             m_join = kCGLineJoinMiter;
 332             break;
 333     }
 334
 335     const CGFloat dashUnit = m_width < 1.0 ? 1.0 : m_width;
 336
 337     const CGFloat dotted[] = { dashUnit , dashUnit + 2.0 };
 338     static const CGFloat short_dashed[] = { 9.0 , 6.0 };
 339     static const CGFloat dashed[] = { 19.0 , 9.0 };
 340     static const CGFloat dotted_dashed[] = { 9.0 , 6.0 , 3.0 , 3.0 };
 341
 342     switch ( pen.GetStyle() )
 343     {
 344         case wxSOLID :
 345             break;
 346
 347         case wxDOT :
 348             m_count = WXSIZEOF(dotted);
 349             m_userLengths = new CGFloat[ m_count ] ;
 350             memcpy( m_userLengths, dotted, sizeof(dotted) );
 351             m_lengths = m_userLengths;
 352             break;
 353
 354         case wxLONG_DASH :
 355             m_count = WXSIZEOF(dashed);
 356             m_lengths = dashed;
 357             break;
 358
 359         case wxSHORT_DASH :
 360             m_count = WXSIZEOF(short_dashed);
 361             m_lengths = short_dashed;
 362             break;
 363
 364         case wxDOT_DASH :
 365             m_count = WXSIZEOF(dotted_dashed);
 366             m_lengths = dotted_dashed;
 367             break;
 368
 369         case wxUSER_DASH :
 370             wxDash *dashes;
 371             m_count = pen.GetDashes( &dashes );
 372             if ((dashes != NULL) && (m_count > 0))
 373             {
 374                 m_userLengths = new CGFloat[m_count];
 375                 for ( int i = 0; i < m_count; ++i )
 376                 {
 377                     m_userLengths[i] = dashes[i] * dashUnit;
 378
 379                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 380                         m_userLengths[i] = dashUnit + 2.0;
 381                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 382                         m_userLengths[i] = dashUnit;
 383                 }
 384             }
 385             m_lengths = m_userLengths;
 386             break;
 387
 388         case wxSTIPPLE :
 389             {
 390                 wxBitmap* bmp = pen.GetStipple();
 391                 if ( bmp && bmp->Ok() )
 392                 {
 393                     m_colorSpace.Set( CGColorSpaceCreatePattern( NULL ) );
 394                     m_pattern.Set( *( new ImagePattern( bmp , CGAffineTransformMakeScale( 1,-1 ) ) ) );
 395                     m_patternColorComponents = new CGFloat[1] ;
 396                     m_patternColorComponents[0] = 1.0;
 397                     m_isPattern = true;
 398                 }
 399             }
 400             break;
 401
 402         default :
 403             {
 404                 m_isPattern = true;
 405                 m_colorSpace.Set( CGColorSpaceCreatePattern( wxMacGetGenericRGBColorSpace() ) );
 406                 m_pattern.Set( *( new HatchPattern( pen.GetStyle() , CGAffineTransformMakeScale( 1,-1 ) ) ) );
 407                 m_patternColorComponents = new CGFloat[4] ;
 408                 m_patternColorComponents[0] = pen.GetColour().Red() / 255.0;
 409                 m_patternColorComponents[1] = pen.GetColour().Green() / 255.0;
 410                 m_patternColorComponents[2] = pen.GetColour().Blue() / 255.0;
 411                 m_patternColorComponents[3] =  pen.GetColour().Alpha() / 255.0;
 412             }
 413             break;
 414     }
 415     if ((m_lengths != NULL) && (m_count > 0))
 416     {
 417         // force the line cap, otherwise we get artifacts (overlaps) and just solid lines
 418         m_cap = kCGLineCapButt;
 419     }
 420 }
 421
 422 wxMacCoreGraphicsPenData::~wxMacCoreGraphicsPenData()
 423 {
 424     delete[] m_userLengths;
 425     delete[] m_patternColorComponents;
 426 }
 427
 428 void wxMacCoreGraphicsPenData::Init()
 429 {
 430     m_lengths = NULL;
 431     m_userLengths = NULL;
 432     m_width = 0;
 433     m_count = 0;
 434     m_patternColorComponents = NULL;
 435     m_isPattern = false;
 436 }
 437
 438 void wxMacCoreGraphicsPenData::Apply( wxGraphicsContext* context )
 439 {
 440     CGContextRef cg = (CGContextRef) context->GetNativeContext();
 441     CGContextSetLineWidth( cg , m_width );
 442     CGContextSetLineJoin( cg , m_join );
 443
 444     CGContextSetLineDash( cg , 0 , m_lengths , m_count );
 445     CGContextSetLineCap( cg , m_cap );
 446
 447     if ( m_isPattern )
 448     {
 449         CGAffineTransform matrix = CGContextGetCTM( cg );
 450         CGContextSetPatternPhase( cg, CGSizeMake(matrix.tx, matrix.ty) );
 451         CGContextSetStrokeColorSpace( cg , m_colorSpace );
 452         CGContextSetStrokePattern( cg, m_pattern , m_patternColorComponents );
 453     }
 454     else
 455     {
 456         if ( context->GetLogicalFunction() == wxINVERT || context->GetLogicalFunction() == wxXOR )
 457         {
 458             CGContextSetRGBStrokeColor( cg , 1.0, 1.0 , 1.0, 1.0 );
 459         }
 460         else
 461             CGContextSetStrokeColorWithColor( cg , m_color );
 462     }
 463 }
 464
 465 //
 466 // Brush
 467 //
 468
 469 static const char *gs_stripedback_xpm[] = {
 470 /* columns rows colors chars-per-pixel */
 471 "4 4 2 1",
 472 ". c #F0F0F0",
 473 "X c #ECECEC",
 474 /* pixels */
 475 "....",
 476 "....",
 477 "XXXX",
 478 "XXXX"
 479 };
 480
 481 wxBitmap gs_stripedback_bmp( wxImage( (const char* const* ) gs_stripedback_xpm  ), -1 ) ;
 482
 483 // make sure we all use one class for all conversions from wx to native colour
 484
 485 class wxMacCoreGraphicsColour
 486 {
 487     public:
 488         wxMacCoreGraphicsColour();
 489         wxMacCoreGraphicsColour(const wxBrush &brush);
 490         ~wxMacCoreGraphicsColour();
 491
 492         void Apply( CGContextRef cgContext );
 493     protected:
 494         void Init();
 495         wxMacCFRefHolder<CGColorRef> m_color;
 496         wxMacCFRefHolder<CGColorSpaceRef> m_colorSpace;
 497
 498         bool m_isPattern;
 499         wxMacCFRefHolder<CGPatternRef> m_pattern;
 500         CGFloat* m_patternColorComponents;
 501 } ;
 502
 503 wxMacCoreGraphicsColour::~wxMacCoreGraphicsColour()
 504 {
 505     delete[] m_patternColorComponents;
 506 }
 507
 508 void wxMacCoreGraphicsColour::Init()
 509 {
 510     m_isPattern = false;
 511     m_patternColorComponents = NULL;
 512 }
 513
 514 void wxMacCoreGraphicsColour::Apply( CGContextRef cgContext )
 515 {
 516     if ( m_isPattern )
 517     {
 518         CGAffineTransform matrix = CGContextGetCTM( cgContext );
 519         CGContextSetPatternPhase( cgContext, CGSizeMake(matrix.tx, matrix.ty) );
 520         CGContextSetFillColorSpace( cgContext , m_colorSpace );
 521         CGContextSetFillPattern( cgContext, m_pattern , m_patternColorComponents );
 522     }
 523     else
 524     {
 525         CGContextSetFillColorWithColor( cgContext, m_color );
 526     }
 527 }
 528
 529 wxMacCoreGraphicsColour::wxMacCoreGraphicsColour()
 530 {
 531     Init();
 532 }
 533
 534 wxMacCoreGraphicsColour::wxMacCoreGraphicsColour( const wxBrush &brush )
 535 {
 536     Init();
 537     if ( brush.GetStyle() == wxSOLID )
 538     {
 539         m_color.Set( brush.GetColour().CreateCGColor() );
 540     }
 541     else if ( brush.IsHatch() )
 542     {
 543         m_isPattern = true;
 544         m_colorSpace.Set( CGColorSpaceCreatePattern( wxMacGetGenericRGBColorSpace() ) );
 545         m_pattern.Set( *( new HatchPattern( brush.GetStyle() , CGAffineTransformMakeScale( 1,-1 ) ) ) );
 546
 547         m_patternColorComponents = new CGFloat[4] ;
 548         m_patternColorComponents[0] = brush.GetColour().Red() / 255.0;
 549         m_patternColorComponents[1] = brush.GetColour().Green() / 255.0;
 550         m_patternColorComponents[2] = brush.GetColour().Blue() / 255.0;
 551         m_patternColorComponents[3] = brush.GetColour().Alpha() / 255.0;
 552     }
 553     else
 554     {
 555         // now brush is a bitmap
 556         wxBitmap* bmp = brush.GetStipple();
 557         if ( bmp && bmp->Ok() )
 558         {
 559             m_isPattern = true;
 560             m_patternColorComponents = new CGFloat[1] ;
 561             m_patternColorComponents[0] = 1.0;
 562             m_colorSpace.Set( CGColorSpaceCreatePattern( NULL ) );
 563             m_pattern.Set( *( new ImagePattern( bmp , CGAffineTransformMakeScale( 1,-1 ) ) ) );
 564         }
 565     }
 566 }
 567
 568 class wxMacCoreGraphicsBrushData : public wxGraphicsObjectRefData
 569 {
 570 public:
 571     wxMacCoreGraphicsBrushData( wxGraphicsRenderer* renderer );
 572     wxMacCoreGraphicsBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 573     ~wxMacCoreGraphicsBrushData ();
 574
 575     virtual void Apply( wxGraphicsContext* context );
 576     void CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 577         const wxColour&c1, const wxColour&c2 );
 578     void CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 579     const wxColour &oColor, const wxColour &cColor );
 580
 581     virtual bool IsShading() { return m_isShading; }
 582     CGShadingRef GetShading() { return m_shading; }
 583 protected:
 584     CGFunctionRef CreateGradientFunction( const wxColour& c1, const wxColour& c2 );
 585     static void CalculateShadingValues (void *info, const CGFloat *in, CGFloat *out);
 586     virtual void Init();
 587
 588     wxMacCoreGraphicsColour m_cgColor;
 589
 590     bool m_isShading;
 591     CGFunctionRef m_gradientFunction;
 592     CGShadingRef m_shading;
 593     CGFloat *m_gradientComponents;
 594 };
 595
 596 wxMacCoreGraphicsBrushData::wxMacCoreGraphicsBrushData( wxGraphicsRenderer* renderer) : wxGraphicsObjectRefData( renderer )
 597 {
 598     Init();
 599 }
 600
 601 void wxMacCoreGraphicsBrushData::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 602         const wxColour&c1, const wxColour&c2 )
 603 {
 604     m_gradientFunction = CreateGradientFunction( c1, c2 );
 605     m_shading = CGShadingCreateAxial( wxMacGetGenericRGBColorSpace(), CGPointMake(x1,y1), CGPointMake(x2,y2), m_gradientFunction, true, true ) ;
 606     m_isShading = true ;
 607 }
 608
 609 void wxMacCoreGraphicsBrushData::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 610     const wxColour &oColor, const wxColour &cColor )
 611 {
 612     m_gradientFunction = CreateGradientFunction( oColor, cColor );
 613     m_shading = CGShadingCreateRadial( wxMacGetGenericRGBColorSpace(), CGPointMake(xo,yo), 0, CGPointMake(xc,yc), radius, m_gradientFunction, true, true ) ;
 614     m_isShading = true ;
 615 }
 616
 617 wxMacCoreGraphicsBrushData::wxMacCoreGraphicsBrushData(wxGraphicsRenderer* renderer, const wxBrush &brush) : wxGraphicsObjectRefData( renderer ),
 618     m_cgColor( brush )
 619 {
 620     Init();
 621
 622 }
 623
 624 wxMacCoreGraphicsBrushData::~wxMacCoreGraphicsBrushData()
 625 {
 626     if ( m_shading )
 627         CGShadingRelease(m_shading);
 628
 629     if( m_gradientFunction )
 630         CGFunctionRelease(m_gradientFunction);
 631
 632     delete[] m_gradientComponents;
 633 }
 634
 635 void wxMacCoreGraphicsBrushData::Init()
 636 {
 637     m_gradientFunction = NULL;
 638     m_shading = NULL;
 639     m_gradientComponents = NULL;
 640     m_isShading = false;
 641 }
 642
 643 void wxMacCoreGraphicsBrushData::Apply( wxGraphicsContext* context )
 644 {
 645     CGContextRef cg = (CGContextRef) context->GetNativeContext();
 646
 647     if ( m_isShading )
 648     {
 649         // nothing to set as shades are processed by clipping using the path and filling
 650     }
 651     else
 652     {
 653         m_cgColor.Apply( cg );
 654     }
 655 }
 656
 657 void wxMacCoreGraphicsBrushData::CalculateShadingValues (void *info, const CGFloat *in, CGFloat *out)
 658 {
 659     CGFloat* colors = (CGFloat*) info ;
 660     CGFloat f = *in;
 661     for( int i = 0 ; i < 4 ; ++i )
 662     {
 663         out[i] = colors[i] + ( colors[4+i] - colors[i] ) * f;
 664     }
 665 }
 666
 667 CGFunctionRef wxMacCoreGraphicsBrushData::CreateGradientFunction( const wxColour& c1, const wxColour& c2 )
 668 {
 669     static const CGFunctionCallbacks callbacks = { 0, &CalculateShadingValues, NULL };
 670     static const CGFloat input_value_range [2] = { 0, 1 };
 671     static const CGFloat output_value_ranges [8] = { 0, 1, 0, 1, 0, 1, 0, 1 };
 672     m_gradientComponents = new CGFloat[8] ;
 673     m_gradientComponents[0] = c1.Red() / 255.0;
 674     m_gradientComponents[1] = c1.Green() / 255.0;
 675     m_gradientComponents[2] = c1.Blue() / 255.0;
 676     m_gradientComponents[3] = c1.Alpha() / 255.0;
 677     m_gradientComponents[4] = c2.Red() / 255.0;
 678     m_gradientComponents[5] = c2.Green() / 255.0;
 679     m_gradientComponents[6] = c2.Blue() / 255.0;
 680     m_gradientComponents[7] = c2.Alpha() / 255.0;
 681
 682     return CGFunctionCreate ( m_gradientComponents,  1,
 683                             input_value_range,
 684                             4,
 685                             output_value_ranges,
 686                             &callbacks);
 687 }
 688
 689 //
 690 // Font
 691 //
 692
 693 class wxMacCoreGraphicsFontData : public wxGraphicsObjectRefData
 694 {
 695 public:
 696     wxMacCoreGraphicsFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col );
 697     ~wxMacCoreGraphicsFontData();
 698
 699 #if wxMAC_USE_ATSU_TEXT
 700     virtual ATSUStyle GetATSUStyle() { return m_macATSUIStyle; }
 701 #endif
 702 #if wxMAC_USE_CORE_TEXT
 703     CTFontRef GetCTFont() const { return m_ctFont ; }
 704 #endif
 705     wxColour GetColour() const { return m_colour ; }
 706
 707     bool GetUnderlined() const { return m_underlined ; }
 708 private :
 709     wxColour m_colour;
 710     bool m_underlined;
 711 #if wxMAC_USE_ATSU_TEXT
 712     ATSUStyle m_macATSUIStyle;
 713 #endif
 714 #if wxMAC_USE_CORE_TEXT
 715     wxCFRef< CTFontRef > m_ctFont;
 716 #endif
 717 };
 718
 719 wxMacCoreGraphicsFontData::wxMacCoreGraphicsFontData(wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col) : wxGraphicsObjectRefData( renderer )
 720 {
 721     m_colour = col;
 722     m_underlined = font.GetUnderlined();
 723
 724 #if wxMAC_USE_CORE_TEXT
 725     m_ctFont.reset( wxCFRetain((CTFontRef) font.MacGetCTFont()) );
 726 #endif
 727 #if wxMAC_USE_ATSU_TEXT
 728     OSStatus status = noErr;
 729     m_macATSUIStyle = NULL;
 730
 731     status = ATSUCreateAndCopyStyle( (ATSUStyle) font.MacGetATSUStyle() , &m_macATSUIStyle );
 732
 733     wxASSERT_MSG( status == noErr, wxT("couldn't create ATSU style") );
 734
 735     // we need the scale here ...
 736
 737     Fixed atsuSize = IntToFixed( int( 1 * font.MacGetFontSize()) );
 738     RGBColor atsuColor ;
 739     col.GetRGBColor( &atsuColor );
 740     ATSUAttributeTag atsuTags[] =
 741     {
 742             kATSUSizeTag ,
 743             kATSUColorTag ,
 744     };
 745     ByteCount atsuSizes[sizeof(atsuTags) / sizeof(ATSUAttributeTag)] =
 746     {
 747             sizeof( Fixed ) ,
 748             sizeof( RGBColor ) ,
 749     };
 750     ATSUAttributeValuePtr atsuValues[sizeof(atsuTags) / sizeof(ATSUAttributeTag)] =
 751     {
 752             &atsuSize ,
 753             &atsuColor ,
 754     };
 755
 756     status = ::ATSUSetAttributes(
 757         m_macATSUIStyle, sizeof(atsuTags) / sizeof(ATSUAttributeTag) ,
 758         atsuTags, atsuSizes, atsuValues);
 759
 760     wxASSERT_MSG( status == noErr , wxT("couldn't modify ATSU style") );
 761 #endif
 762 #if WXMAC_USE_CG_TEXT
 763 #endif
 764 }
 765
 766 wxMacCoreGraphicsFontData::~wxMacCoreGraphicsFontData()
 767 {
 768 #if wxMAC_USE_CORE_TEXT
 769 #endif
 770 #if wxMAC_USE_ATSU_TEXT
 771     if ( m_macATSUIStyle )
 772     {
 773         ::ATSUDisposeStyle((ATSUStyle)m_macATSUIStyle);
 774         m_macATSUIStyle = NULL;
 775     }
 776 #endif
 777 #if WXMAC_USE_CG_TEXT
 778 #endif
 779 }
 780
 781 //
 782 // Graphics Matrix
 783 //
 784
 785 //-----------------------------------------------------------------------------
 786 // wxMacCoreGraphicsMatrix declaration
 787 //-----------------------------------------------------------------------------
 788
 789 class WXDLLIMPEXP_CORE wxMacCoreGraphicsMatrixData : public wxGraphicsMatrixData
 790 {
 791 public :
 792     wxMacCoreGraphicsMatrixData(wxGraphicsRenderer* renderer) ;
 793
 794     virtual ~wxMacCoreGraphicsMatrixData() ;
 795
 796     virtual wxGraphicsObjectRefData *Clone() const ;
 797
 798     // concatenates the matrix
 799     virtual void Concat( const wxGraphicsMatrixData *t );
 800
 801     // sets the matrix to the respective values
 802     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 803         wxDouble tx=0.0, wxDouble ty=0.0);
 804
 805     // gets the component valuess of the matrix
 806     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
 807                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
 808
 809     // makes this the inverse matrix
 810     virtual void Invert();
 811
 812     // returns true if the elements of the transformation matrix are equal ?
 813     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
 814
 815     // return true if this is the identity matrix
 816     virtual bool IsIdentity() const;
 817
 818     //
 819     // transformation
 820     //
 821
 822     // add the translation to this matrix
 823     virtual void Translate( wxDouble dx , wxDouble dy );
 824
 825     // add the scale to this matrix
 826     virtual void Scale( wxDouble xScale , wxDouble yScale );
 827
 828     // add the rotation to this matrix (radians)
 829     virtual void Rotate( wxDouble angle );
 830
 831     //
 832     // apply the transforms
 833     //
 834
 835     // applies that matrix to the point
 836     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 837
 838     // applies the matrix except for translations
 839     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 840
 841     // returns the native representation
 842     virtual void * GetNativeMatrix() const;
 843
 844 private :
 845     CGAffineTransform m_matrix;
 846 } ;
 847
 848 //-----------------------------------------------------------------------------
 849 // wxMacCoreGraphicsMatrix implementation
 850 //-----------------------------------------------------------------------------
 851
 852 wxMacCoreGraphicsMatrixData::wxMacCoreGraphicsMatrixData(wxGraphicsRenderer* renderer) : wxGraphicsMatrixData(renderer)
 853 {
 854 }
 855
 856 wxMacCoreGraphicsMatrixData::~wxMacCoreGraphicsMatrixData()
 857 {
 858 }
 859
 860 wxGraphicsObjectRefData *wxMacCoreGraphicsMatrixData::Clone() const
 861 {
 862     wxMacCoreGraphicsMatrixData* m = new wxMacCoreGraphicsMatrixData(GetRenderer()) ;
 863     m->m_matrix = m_matrix ;
 864     return m;
 865 }
 866
 867 // concatenates the matrix
 868 void wxMacCoreGraphicsMatrixData::Concat( const wxGraphicsMatrixData *t )
 869 {
 870     m_matrix = CGAffineTransformConcat(m_matrix, *((CGAffineTransform*) t->GetNativeMatrix()) );
 871 }
 872
 873 // sets the matrix to the respective values
 874 void wxMacCoreGraphicsMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
 875     wxDouble tx, wxDouble ty)
 876 {
 877     m_matrix = CGAffineTransformMake(a,b,c,d,tx,ty);
 878 }
 879
 880 // gets the component valuess of the matrix
 881 void wxMacCoreGraphicsMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
 882                                       wxDouble* d, wxDouble* tx, wxDouble* ty) const
 883 {
 884     if (a)  *a = m_matrix.a;
 885     if (b)  *b = m_matrix.b;
 886     if (c)  *c = m_matrix.c;
 887     if (d)  *d = m_matrix.d;
 888     if (tx) *tx= m_matrix.tx;
 889     if (ty) *ty= m_matrix.ty;
 890 }
 891
 892 // makes this the inverse matrix
 893 void wxMacCoreGraphicsMatrixData::Invert()
 894 {
 895     m_matrix = CGAffineTransformInvert( m_matrix );
 896 }
 897
 898 // returns true if the elements of the transformation matrix are equal ?
 899 bool wxMacCoreGraphicsMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
 900 {
 901     return CGAffineTransformEqualToTransform(m_matrix, *((CGAffineTransform*) t->GetNativeMatrix()));
 902 }
 903
 904 // return true if this is the identity matrix
 905 bool wxMacCoreGraphicsMatrixData::IsIdentity() const
 906 {
 907     return ( m_matrix.a == 1 && m_matrix.d == 1 &&
 908         m_matrix.b == 0 && m_matrix.d == 0 && m_matrix.tx == 0 && m_matrix.ty == 0);
 909 }
 910
 911 //
 912 // transformation
 913 //
 914
 915 // add the translation to this matrix
 916 void wxMacCoreGraphicsMatrixData::Translate( wxDouble dx , wxDouble dy )
 917 {
 918     m_matrix = CGAffineTransformTranslate( m_matrix, dx, dy);
 919 }
 920
 921 // add the scale to this matrix
 922 void wxMacCoreGraphicsMatrixData::Scale( wxDouble xScale , wxDouble yScale )
 923 {
 924     m_matrix = CGAffineTransformScale( m_matrix, xScale, yScale);
 925 }
 926
 927 // add the rotation to this matrix (radians)
 928 void wxMacCoreGraphicsMatrixData::Rotate( wxDouble angle )
 929 {
 930     m_matrix = CGAffineTransformRotate( m_matrix, angle);
 931 }
 932
 933 //
 934 // apply the transforms
 935 //
 936
 937 // applies that matrix to the point
 938 void wxMacCoreGraphicsMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
 939 {
 940     CGPoint pt = CGPointApplyAffineTransform( CGPointMake(*x,*y), m_matrix);
 941
 942     *x = pt.x;
 943     *y = pt.y;
 944 }
 945
 946 // applies the matrix except for translations
 947 void wxMacCoreGraphicsMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
 948 {
 949     CGSize sz = CGSizeApplyAffineTransform( CGSizeMake(*dx,*dy) , m_matrix );
 950     *dx = sz.width;
 951     *dy = sz.height;
 952 }
 953
 954 // returns the native representation
 955 void * wxMacCoreGraphicsMatrixData::GetNativeMatrix() const
 956 {
 957     return (void*) &m_matrix;
 958 }
 959
 960 //
 961 // Graphics Path
 962 //
 963
 964 //-----------------------------------------------------------------------------
 965 // wxMacCoreGraphicsPath declaration
 966 //-----------------------------------------------------------------------------
 967
 968 class WXDLLEXPORT wxMacCoreGraphicsPathData : public wxGraphicsPathData
 969 {
 970 public :
 971     wxMacCoreGraphicsPathData( wxGraphicsRenderer* renderer, CGMutablePathRef path = NULL);
 972
 973     ~wxMacCoreGraphicsPathData();
 974
 975     virtual wxGraphicsObjectRefData *Clone() const;
 976
 977     // begins a new subpath at (x,y)
 978     virtual void MoveToPoint( wxDouble x, wxDouble y );
 979
 980     // adds a straight line from the current point to (x,y)
 981     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 982
 983     // adds a cubic Bezier curve from the current point, using two control points and an end point
 984     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 985
 986     // closes the current sub-path
 987     virtual void CloseSubpath();
 988
 989     // gets the last point of the current path, (0,0) if not yet set
 990     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 991
 992     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 993     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise );
 994
 995     //
 996     // These are convenience functions which - if not available natively will be assembled
 997     // using the primitives from above
 998     //
 999
1000     // adds a quadratic Bezier curve from the current point, using a control point and an end point
1001     virtual void AddQuadCurveToPoint( wxDouble cx, wxDouble cy, wxDouble x, wxDouble y );
1002
1003     // appends a rectangle as a new closed subpath
1004     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
1005
1006     // appends an ellipsis as a new closed subpath fitting the passed rectangle
1007     virtual void AddCircle( wxDouble x, wxDouble y, wxDouble r );
1008
1009     // draws a an arc to two tangents connecting (current) to (x1,y1) and (x1,y1) to (x2,y2), also a straight line from (current) to (x1,y1)
1010     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r );
1011
1012     // adds another path
1013     virtual void AddPath( const wxGraphicsPathData* path );
1014
1015     // returns the native path
1016     virtual void * GetNativePath() const { return m_path; }
1017
1018     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
1019     virtual void UnGetNativePath(void *WXUNUSED(p)) const {}
1020
1021     // transforms each point of this path by the matrix
1022     virtual void Transform( const wxGraphicsMatrixData* matrix );
1023
1024     // gets the bounding box enclosing all points (possibly including control points)
1025     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *y) const;
1026
1027     virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxODDEVEN_RULE) const;
1028 private :
1029     CGMutablePathRef m_path;
1030 };
1031
1032 //-----------------------------------------------------------------------------
1033 // wxMacCoreGraphicsPath implementation
1034 //-----------------------------------------------------------------------------
1035
1036 wxMacCoreGraphicsPathData::wxMacCoreGraphicsPathData( wxGraphicsRenderer* renderer, CGMutablePathRef path) : wxGraphicsPathData(renderer)
1037 {
1038     if ( path )
1039         m_path = path;
1040     else
1041         m_path = CGPathCreateMutable();
1042 }
1043
1044 wxMacCoreGraphicsPathData::~wxMacCoreGraphicsPathData()
1045 {
1046     CGPathRelease( m_path );
1047 }
1048
1049 wxGraphicsObjectRefData* wxMacCoreGraphicsPathData::Clone() const
1050 {
1051     wxMacCoreGraphicsPathData* clone = new wxMacCoreGraphicsPathData(GetRenderer(),CGPathCreateMutableCopy(m_path));
1052     return clone ;
1053 }
1054
1055
1056 // opens (starts) a new subpath
1057 void wxMacCoreGraphicsPathData::MoveToPoint( wxDouble x1 , wxDouble y1 )
1058 {
1059     CGPathMoveToPoint( m_path , NULL , x1 , y1 );
1060 }
1061
1062 void wxMacCoreGraphicsPathData::AddLineToPoint( wxDouble x1 , wxDouble y1 )
1063 {
1064     CGPathAddLineToPoint( m_path , NULL , x1 , y1 );
1065 }
1066
1067 void wxMacCoreGraphicsPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
1068 {
1069     CGPathAddCurveToPoint( m_path , NULL , cx1 , cy1 , cx2, cy2, x , y );
1070 }
1071
1072 void wxMacCoreGraphicsPathData::AddQuadCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble x, wxDouble y )
1073 {
1074     CGPathAddQuadCurveToPoint( m_path , NULL , cx1 , cy1 , x , y );
1075 }
1076
1077 void wxMacCoreGraphicsPathData::AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1078 {
1079     CGRect cgRect = { { x , y } , { w , h } };
1080     CGPathAddRect( m_path , NULL , cgRect );
1081 }
1082
1083 void wxMacCoreGraphicsPathData::AddCircle( wxDouble x, wxDouble y , wxDouble r )
1084 {
1085     CGPathAddArc( m_path , NULL , x , y , r , 0.0 , 2 * M_PI , true );
1086 }
1087
1088 // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
1089 void wxMacCoreGraphicsPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise )
1090 {
1091     // inverse direction as we the 'normal' state is a y axis pointing down, ie mirrored to the standard core graphics setup
1092     CGPathAddArc( m_path, NULL , x, y, r, startAngle, endAngle, !clockwise);
1093 }
1094
1095 void wxMacCoreGraphicsPathData::AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )
1096 {
1097     CGPathAddArcToPoint( m_path, NULL , x1, y1, x2, y2, r);
1098 }
1099
1100 void wxMacCoreGraphicsPathData::AddPath( const wxGraphicsPathData* path )
1101 {
1102     CGPathAddPath( m_path , NULL, (CGPathRef) path->GetNativePath() );
1103 }
1104
1105 // closes the current subpath
1106 void wxMacCoreGraphicsPathData::CloseSubpath()
1107 {
1108     CGPathCloseSubpath( m_path );
1109 }
1110
1111 // gets the last point of the current path, (0,0) if not yet set
1112 void wxMacCoreGraphicsPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
1113 {
1114     CGPoint p = CGPathGetCurrentPoint( m_path );
1115     *x = p.x;
1116     *y = p.y;
1117 }
1118
1119 // transforms each point of this path by the matrix
1120 void wxMacCoreGraphicsPathData::Transform( const wxGraphicsMatrixData* matrix )
1121 {
1122     CGMutablePathRef p = CGPathCreateMutable() ;
1123     CGPathAddPath( p, (CGAffineTransform*) matrix->GetNativeMatrix() , m_path );
1124     CGPathRelease( m_path );
1125     m_path = p;
1126 }
1127
1128 // gets the bounding box enclosing all points (possibly including control points)
1129 void wxMacCoreGraphicsPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
1130 {
1131     CGRect bounds = CGPathGetBoundingBox( m_path ) ;
1132     *x = bounds.origin.x;
1133     *y = bounds.origin.y;
1134     *w = bounds.size.width;
1135     *h = bounds.size.height;
1136 }
1137
1138 bool wxMacCoreGraphicsPathData::Contains( wxDouble x, wxDouble y, int fillStyle) const
1139 {
1140     return CGPathContainsPoint( m_path, NULL, CGPointMake(x,y), fillStyle == wxODDEVEN_RULE );
1141 }
1142
1143 //
1144 // Graphics Context
1145 //
1146
1147 //-----------------------------------------------------------------------------
1148 // wxMacCoreGraphicsContext declaration
1149 //-----------------------------------------------------------------------------
1150
1151 class WXDLLEXPORT wxMacCoreGraphicsContext : public wxGraphicsContext
1152 {
1153 public:
1154     wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, CGContextRef cgcontext, wxDouble width = 0, wxDouble height = 0 );
1155
1156     wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, WindowRef window );
1157
1158     wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, wxWindow* window );
1159
1160     wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer);
1161
1162     wxMacCoreGraphicsContext();
1163
1164     ~wxMacCoreGraphicsContext();
1165
1166     void Init();
1167
1168     // returns the size of the graphics context in device coordinates
1169     virtual void GetSize( wxDouble* width, wxDouble* height);
1170
1171     virtual void StartPage( wxDouble width, wxDouble height );
1172
1173     virtual void EndPage();
1174
1175     virtual void Flush();
1176
1177     // push the current state of the context, ie the transformation matrix on a stack
1178     virtual void PushState();
1179
1180     // pops a stored state from the stack
1181     virtual void PopState();
1182
1183     // clips drawings to the region
1184     virtual void Clip( const wxRegion &region );
1185
1186     // clips drawings to the rect
1187     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
1188
1189     // resets the clipping to original extent
1190     virtual void ResetClip();
1191
1192     virtual void * GetNativeContext();
1193
1194     bool SetLogicalFunction( int function );
1195     //
1196     // transformation
1197     //
1198
1199     // translate
1200     virtual void Translate( wxDouble dx , wxDouble dy );
1201
1202     // scale
1203     virtual void Scale( wxDouble xScale , wxDouble yScale );
1204
1205     // rotate (radians)
1206     virtual void Rotate( wxDouble angle );
1207
1208     // concatenates this transform with the current transform of this context
1209     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
1210
1211     // sets the transform of this context
1212     virtual void SetTransform( const wxGraphicsMatrix& matrix );
1213
1214     // gets the matrix of this context
1215     virtual wxGraphicsMatrix GetTransform() const;
1216     //
1217     // setting the paint
1218     //
1219
1220     // strokes along a path with the current pen
1221     virtual void StrokePath( const wxGraphicsPath &path );
1222
1223     // fills a path with the current brush
1224     virtual void FillPath( const wxGraphicsPath &path, int fillStyle = wxODDEVEN_RULE );
1225
1226     // draws a path by first filling and then stroking
1227     virtual void DrawPath( const wxGraphicsPath &path, int fillStyle = wxODDEVEN_RULE );
1228
1229     virtual bool ShouldOffset() const
1230     {
1231         int penwidth = 0 ;
1232         if ( !m_pen.IsNull() )
1233         {
1234             penwidth = (int)((wxMacCoreGraphicsPenData*)m_pen.GetRefData())->GetWidth();
1235             if ( penwidth == 0 )
1236                 penwidth = 1;
1237         }
1238         return ( penwidth % 2 ) == 1;
1239     }
1240     //
1241     // text
1242     //
1243
1244     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y );
1245
1246     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle );
1247
1248     virtual void GetTextExtent( const wxString &text, wxDouble *width, wxDouble *height,
1249         wxDouble *descent, wxDouble *externalLeading ) const;
1250
1251     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
1252
1253     //
1254     // image support
1255     //
1256
1257     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
1258
1259     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
1260
1261     void SetNativeContext( CGContextRef cg );
1262
1263     DECLARE_NO_COPY_CLASS(wxMacCoreGraphicsContext)
1264     DECLARE_DYNAMIC_CLASS(wxMacCoreGraphicsContext)
1265
1266 private:
1267     void EnsureIsValid();
1268
1269     CGContextRef m_cgContext;
1270     WindowRef m_windowRef;
1271     bool m_releaseContext;
1272     CGAffineTransform m_windowTransform;
1273     wxDouble m_width;
1274     wxDouble m_height;
1275
1276     wxMacCFRefHolder<HIShapeRef> m_clipRgn;
1277 };
1278
1279 //-----------------------------------------------------------------------------
1280 // device context implementation
1281 //
1282 // more and more of the dc functionality should be implemented by calling
1283 // the appropricate wxMacCoreGraphicsContext, but we will have to do that step by step
1284 // also coordinate conversions should be moved to native matrix ops
1285 //-----------------------------------------------------------------------------
1286
1287 // we always stock two context states, one at entry, to be able to preserve the
1288 // state we were called with, the other one after changing to HI Graphics orientation
1289 // (this one is used for getting back clippings etc)
1290
1291 //-----------------------------------------------------------------------------
1292 // wxMacCoreGraphicsContext implementation
1293 //-----------------------------------------------------------------------------
1294
1295 IMPLEMENT_DYNAMIC_CLASS(wxMacCoreGraphicsContext, wxGraphicsContext)
1296
1297 class wxQuartzOffsetHelper
1298 {
1299 public :
1300     wxQuartzOffsetHelper( CGContextRef cg , bool offset )
1301     {
1302         m_cg = cg;
1303         m_offset = offset;
1304         if ( m_offset )
1305             CGContextTranslateCTM( m_cg, 0.5, 0.5 );
1306     }
1307     ~wxQuartzOffsetHelper( )
1308     {
1309         if ( m_offset )
1310             CGContextTranslateCTM( m_cg, -0.5, -0.5 );
1311     }
1312 public :
1313     CGContextRef m_cg;
1314     bool m_offset;
1315 } ;
1316
1317 void wxMacCoreGraphicsContext::Init()
1318 {
1319     m_cgContext = NULL;
1320     m_releaseContext = false;
1321     m_windowRef = NULL;
1322     m_width = 0;
1323     m_height = 0;
1324
1325     HIRect r = CGRectMake(0,0,0,0);
1326     m_clipRgn.Set(HIShapeCreateWithRect(&r));
1327 }
1328
1329 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, CGContextRef cgcontext, wxDouble width, wxDouble height ) : wxGraphicsContext(renderer)
1330 {
1331     Init();
1332     SetNativeContext(cgcontext);
1333     m_width = width;
1334     m_height = height;
1335 }
1336
1337 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, WindowRef window ): wxGraphicsContext(renderer)
1338 {
1339     Init();
1340     m_windowRef = window;
1341 }
1342
1343 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, wxWindow* window ): wxGraphicsContext(renderer)
1344 {
1345     Init();
1346     m_windowRef = (WindowRef) window->MacGetTopLevelWindowRef();
1347     int originX , originY;
1348     originX = originY = 0;
1349     window->MacWindowToRootWindow( &originX , &originY );
1350
1351     Rect bounds = { 0,0,0,0 };
1352 #ifdef __LP64__
1353 #else
1354     GetWindowBounds( m_windowRef, kWindowContentRgn, &bounds );
1355 #endif
1356     m_windowTransform = CGAffineTransformMakeTranslation( 0 , bounds.bottom - bounds.top );
1357     m_windowTransform = CGAffineTransformScale( m_windowTransform , 1 , -1 );
1358     m_windowTransform = CGAffineTransformTranslate( m_windowTransform, originX, originY ) ;
1359 }
1360
1361 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext(wxGraphicsRenderer* renderer) : wxGraphicsContext(renderer)
1362 {
1363     Init();
1364 }
1365
1366 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext() : wxGraphicsContext(NULL)
1367 {
1368     Init();
1369     wxLogDebug(wxT("Illegal Constructor called"));
1370 }
1371
1372 wxMacCoreGraphicsContext::~wxMacCoreGraphicsContext()
1373 {
1374     SetNativeContext(NULL);
1375 }
1376
1377 void wxMacCoreGraphicsContext::GetSize( wxDouble* width, wxDouble* height)
1378 {
1379     *width = m_width;
1380     *height = m_height;
1381 }
1382
1383
1384 void wxMacCoreGraphicsContext::StartPage( wxDouble width, wxDouble height )
1385 {
1386     CGRect r;
1387     if ( width != 0 && height != 0)
1388         r = CGRectMake( 0 , 0 , width  , height );
1389     else
1390         r = CGRectMake( 0 , 0 , m_width  , m_height );
1391
1392     CGContextBeginPage(m_cgContext,  &r );
1393 //    CGContextTranslateCTM( m_cgContext , 0 ,  height == 0 ? m_height : height );
1394 //    CGContextScaleCTM( m_cgContext , 1 , -1 );
1395 }
1396
1397 void wxMacCoreGraphicsContext::EndPage()
1398 {
1399     CGContextEndPage(m_cgContext);
1400 }
1401
1402 void wxMacCoreGraphicsContext::Flush()
1403 {
1404     CGContextFlush(m_cgContext);
1405 }
1406
1407 void wxMacCoreGraphicsContext::EnsureIsValid()
1408 {
1409     if ( !m_cgContext )
1410     {
1411         OSStatus status =
1412 #ifndef __LP64__
1413             QDBeginCGContext( GetWindowPort( m_windowRef ) , &m_cgContext );
1414 #else
1415             paramErr;
1416 #endif
1417         wxASSERT_MSG( status == noErr , wxT("Cannot nest wxDCs on the same window") );
1418
1419         CGContextConcatCTM( m_cgContext, m_windowTransform );
1420                 CGContextSaveGState( m_cgContext );
1421                 m_releaseContext = true;
1422                 if ( !HIShapeIsEmpty(m_clipRgn) )
1423                 {
1424             // the clip region is in device coordinates, so we convert this again to user coordinates
1425             wxMacCFRefHolder<HIMutableShapeRef> hishape ;
1426             hishape.Set( HIShapeCreateMutableCopy( m_clipRgn ) );
1427             CGPoint transformedOrigin = CGPointApplyAffineTransform( CGPointZero,m_windowTransform);
1428             HIShapeOffset( hishape, -transformedOrigin.x, -transformedOrigin.y );
1429                         HIShapeReplacePathInCGContext( hishape, m_cgContext );
1430                         CGContextClip( m_cgContext );
1431                 }
1432                 CGContextSaveGState( m_cgContext );
1433         }
1434 }
1435
1436 // TODO test whether the private CGContextSetCompositeOperation works under 10.3 (using NSCompositingModes)
1437
1438 bool wxMacCoreGraphicsContext::SetLogicalFunction( int function )
1439 {
1440     if (m_logicalFunction == function)
1441         return true;
1442
1443     EnsureIsValid();
1444
1445     bool retval = false;
1446
1447     if ( function == wxCOPY )
1448     {
1449         retval = true;
1450         CGContextSetBlendMode( m_cgContext, kCGBlendModeNormal );
1451     }
1452     else if ( function == wxINVERT || function == wxXOR )
1453     {
1454         // change color to white
1455         CGContextSetBlendMode( m_cgContext, kCGBlendModeExclusion );
1456         CGContextSetShouldAntialias( m_cgContext, false );
1457         retval = true;
1458     }
1459
1460     if (retval)
1461         m_logicalFunction = function;
1462     return retval ;
1463 }
1464
1465 void wxMacCoreGraphicsContext::Clip( const wxRegion &region )
1466 {
1467     if( m_cgContext )
1468     {
1469         HIShapeReplacePathInCGContext( region.GetWXHRGN() , m_cgContext );
1470         CGContextClip( m_cgContext );
1471     }
1472     else
1473     {
1474         // this offsetting to device coords is not really correct, but since we cannot apply affine transforms
1475         // to regions we try at least to have correct translations
1476         HIMutableShapeRef mutableShape = HIShapeCreateMutableCopy( region.GetWXHRGN() );
1477
1478         CGPoint transformedOrigin = CGPointApplyAffineTransform( CGPointZero, m_windowTransform );
1479         HIShapeOffset( mutableShape, transformedOrigin.x, transformedOrigin.y );
1480         m_clipRgn.Set(mutableShape);
1481     }
1482 }
1483
1484 // clips drawings to the rect
1485 void wxMacCoreGraphicsContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1486 {
1487     HIRect r = CGRectMake( x , y , w , h );
1488     if ( m_cgContext )
1489     {
1490         CGContextClipToRect( m_cgContext, r );
1491     }
1492     else
1493     {
1494         // the clipping itself must be stored as device coordinates, otherwise
1495         // we cannot apply it back correctly
1496         r.origin= CGPointApplyAffineTransform( r.origin, m_windowTransform );
1497         m_clipRgn.Set(HIShapeCreateWithRect(&r));
1498     }
1499 }
1500
1501     // resets the clipping to original extent
1502 void wxMacCoreGraphicsContext::ResetClip()
1503 {
1504     if ( m_cgContext )
1505     {
1506         // there is no way for clearing the clip, we can only revert to the stored
1507         // state, but then we have to make sure everything else is NOT restored
1508         CGAffineTransform transform = CGContextGetCTM( m_cgContext );
1509         CGContextRestoreGState( m_cgContext );
1510         CGContextSaveGState( m_cgContext );
1511         CGAffineTransform transformNew = CGContextGetCTM( m_cgContext );
1512         transformNew = CGAffineTransformInvert( transformNew ) ;
1513         CGContextConcatCTM( m_cgContext, transformNew);
1514         CGContextConcatCTM( m_cgContext, transform);
1515     }
1516     else
1517     {
1518         HIRect r = CGRectMake(0,0,0,0);
1519         m_clipRgn.Set(HIShapeCreateWithRect(&r));
1520     }
1521 }
1522
1523 void wxMacCoreGraphicsContext::StrokePath( const wxGraphicsPath &path )
1524 {
1525     if ( m_pen.IsNull() )
1526         return ;
1527
1528     EnsureIsValid();
1529
1530     wxQuartzOffsetHelper helper( m_cgContext , ShouldOffset() );
1531
1532     ((wxMacCoreGraphicsPenData*)m_pen.GetRefData())->Apply(this);
1533     CGContextAddPath( m_cgContext , (CGPathRef) path.GetNativePath() );
1534     CGContextStrokePath( m_cgContext );
1535 }
1536
1537 void wxMacCoreGraphicsContext::DrawPath( const wxGraphicsPath &path , int fillStyle )
1538 {
1539     if ( !m_brush.IsNull() && ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
1540     {
1541         // when using shading, we cannot draw pen and brush at the same time
1542         // revert to the base implementation of first filling and then stroking
1543         wxGraphicsContext::DrawPath( path, fillStyle );
1544         return;
1545     }
1546
1547     CGPathDrawingMode mode = kCGPathFill ;
1548     if ( m_brush.IsNull() )
1549     {
1550         if ( m_pen.IsNull() )
1551             return;
1552         else
1553             mode = kCGPathStroke;
1554     }
1555     else
1556     {
1557         if ( m_pen.IsNull() )
1558         {
1559             if ( fillStyle == wxODDEVEN_RULE )
1560                 mode = kCGPathEOFill;
1561             else
1562                 mode = kCGPathFill;
1563         }
1564         else
1565         {
1566             if ( fillStyle == wxODDEVEN_RULE )
1567                 mode = kCGPathEOFillStroke;
1568             else
1569                 mode = kCGPathFillStroke;
1570         }
1571     }
1572
1573     EnsureIsValid();
1574
1575     if ( !m_brush.IsNull() )
1576         ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->Apply(this);
1577     if ( !m_pen.IsNull() )
1578         ((wxMacCoreGraphicsPenData*)m_pen.GetRefData())->Apply(this);
1579
1580     wxQuartzOffsetHelper helper( m_cgContext , ShouldOffset() );
1581
1582     CGContextAddPath( m_cgContext , (CGPathRef) path.GetNativePath() );
1583     CGContextDrawPath( m_cgContext , mode );
1584 }
1585
1586 void wxMacCoreGraphicsContext::FillPath( const wxGraphicsPath &path , int fillStyle )
1587 {
1588     if ( m_brush.IsNull() )
1589         return;
1590
1591     EnsureIsValid();
1592
1593     if ( ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
1594     {
1595         CGContextSaveGState( m_cgContext );
1596         CGContextAddPath( m_cgContext , (CGPathRef) path.GetNativePath() );
1597         CGContextClip( m_cgContext );
1598         CGContextDrawShading( m_cgContext, ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->GetShading() );
1599         CGContextRestoreGState( m_cgContext);
1600     }
1601     else
1602     {
1603         ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->Apply(this);
1604         CGContextAddPath( m_cgContext , (CGPathRef) path.GetNativePath() );
1605         if ( fillStyle == wxODDEVEN_RULE )
1606             CGContextEOFillPath( m_cgContext );
1607         else
1608             CGContextFillPath( m_cgContext );
1609     }
1610 }
1611
1612 void wxMacCoreGraphicsContext::SetNativeContext( CGContextRef cg )
1613 {
1614     // we allow either setting or clearing but not replacing
1615     wxASSERT( m_cgContext == NULL || cg == NULL );
1616
1617     if ( m_cgContext )
1618     {
1619         // TODO : when is this necessary - should we add a Flush() method ? CGContextSynchronize( m_cgContext );
1620         CGContextRestoreGState( m_cgContext );
1621         CGContextRestoreGState( m_cgContext );
1622         if ( m_releaseContext )
1623         {
1624 #ifndef __LP64__
1625             QDEndCGContext( GetWindowPort( m_windowRef ) , &m_cgContext);
1626 #endif
1627         }
1628         else
1629             CGContextRelease(m_cgContext);
1630     }
1631
1632
1633     m_cgContext = cg;
1634
1635     // FIXME: This check is needed because currently we need to use a DC/GraphicsContext
1636     // in order to get font properties, like wxFont::GetPixelSize, but since we don't have
1637     // a native window attached to use, I create a wxGraphicsContext with a NULL CGContextRef
1638     // for this one operation.
1639
1640     // When wxFont::GetPixelSize on Mac no longer needs a graphics context, this check
1641     // can be removed.
1642     if (m_cgContext)
1643     {
1644         CGContextRetain(m_cgContext);
1645         CGContextSaveGState( m_cgContext );
1646         CGContextSaveGState( m_cgContext );
1647         m_releaseContext = false;
1648     }
1649 }
1650
1651 void wxMacCoreGraphicsContext::Translate( wxDouble dx , wxDouble dy )
1652 {
1653     if ( m_cgContext )
1654         CGContextTranslateCTM( m_cgContext, dx, dy );
1655     else
1656         m_windowTransform = CGAffineTransformTranslate(m_windowTransform,dx,dy);
1657 }
1658
1659 void wxMacCoreGraphicsContext::Scale( wxDouble xScale , wxDouble yScale )
1660 {
1661     if ( m_cgContext )
1662         CGContextScaleCTM( m_cgContext , xScale , yScale );
1663     else
1664         m_windowTransform = CGAffineTransformScale(m_windowTransform,xScale,yScale);
1665 }
1666
1667 void wxMacCoreGraphicsContext::Rotate( wxDouble angle )
1668 {
1669     if ( m_cgContext )
1670         CGContextRotateCTM( m_cgContext , angle );
1671     else
1672         m_windowTransform = CGAffineTransformRotate(m_windowTransform,angle);
1673 }
1674
1675 void wxMacCoreGraphicsContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1676 {
1677     EnsureIsValid();
1678
1679     CGImageRef image = (CGImageRef)( bmp.CreateCGImage() );
1680     HIRect r = CGRectMake( x , y , w , h );
1681     if ( bmp.GetDepth() == 1 )
1682     {
1683         // is is a mask, the '1' in the mask tell where to draw the current brush
1684         if (  !m_brush.IsNull() )
1685         {
1686             if ( ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
1687             {
1688                 // TODO clip to mask
1689             /*
1690                 CGContextSaveGState( m_cgContext );
1691                 CGContextAddPath( m_cgContext , (CGPathRef) path.GetNativePath() );
1692                 CGContextClip( m_cgContext );
1693                 CGContextDrawShading( m_cgContext, ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->GetShading() );
1694                 CGContextRestoreGState( m_cgContext);
1695             */
1696             }
1697             else
1698             {
1699                 ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->Apply(this);
1700                 wxMacDrawCGImage( m_cgContext , &r , image );
1701             }
1702         }
1703     }
1704     else
1705     {
1706         wxMacDrawCGImage( m_cgContext , &r , image );
1707     }
1708     CGImageRelease( image );
1709 }
1710
1711 void wxMacCoreGraphicsContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1712 {
1713     EnsureIsValid();
1714
1715     CGRect r = CGRectMake( 00 , 00 , w , h );
1716     CGContextSaveGState( m_cgContext );
1717     CGContextTranslateCTM( m_cgContext, x , y + h );
1718     CGContextScaleCTM( m_cgContext, 1, -1 );
1719     PlotIconRefInContext( m_cgContext , &r , kAlignNone , kTransformNone ,
1720         NULL , kPlotIconRefNormalFlags , MAC_WXHICON( icon.GetHICON() ) );
1721     CGContextRestoreGState( m_cgContext );
1722 }
1723
1724 void wxMacCoreGraphicsContext::PushState()
1725 {
1726     EnsureIsValid();
1727
1728     CGContextSaveGState( m_cgContext );
1729 }
1730
1731 void wxMacCoreGraphicsContext::PopState()
1732 {
1733     EnsureIsValid();
1734
1735     CGContextRestoreGState( m_cgContext );
1736 }
1737
1738 void wxMacCoreGraphicsContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
1739 {
1740     if ( m_font.IsNull() )
1741         return;
1742
1743     EnsureIsValid();
1744 #if wxMAC_USE_CORE_TEXT
1745     if ( UMAGetSystemVersion() >= 0x1050 )
1746     {
1747         wxMacCoreGraphicsFontData* fref = (wxMacCoreGraphicsFontData*)m_font.GetRefData();
1748         wxMacCFStringHolder text(str, wxLocale::GetSystemEncoding() );
1749         CTFontRef font = fref->GetCTFont();
1750         CGColorRef col = fref->GetColour().GetPixel();
1751         CTUnderlineStyle ustyle = fref->GetUnderlined() ? kCTUnderlineStyleSingle : kCTUnderlineStyleNone ;
1752         wxCFRef<CFNumberRef> underlined( CFNumberCreate(NULL, kCFNumberSInt32Type, &ustyle) );
1753         CFStringRef keys[] = { kCTFontAttributeName , kCTForegroundColorAttributeName, kCTUnderlineStyleAttributeName };
1754         CFTypeRef values[] = { font, col, underlined };
1755         wxCFRef<CFDictionaryRef> attributes( CFDictionaryCreate(kCFAllocatorDefault, (const void**) &keys, (const void**) &values,
1756                                                         WXSIZEOF( keys ), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks) );
1757         wxCFRef<CFAttributedStringRef> attrtext( CFAttributedStringCreate(kCFAllocatorDefault, text, attributes) );
1758         wxCFRef<CTLineRef> line( CTLineCreateWithAttributedString(attrtext) );
1759
1760         y += CTFontGetAscent(font);
1761
1762         CGContextSaveGState(m_cgContext);
1763         CGContextTranslateCTM(m_cgContext, x, y);
1764         CGContextScaleCTM(m_cgContext, 1, -1);
1765         CGContextSetTextPosition(m_cgContext, 0, 0);
1766         CTLineDraw( line, m_cgContext );
1767         CGContextRestoreGState(m_cgContext);
1768         return;
1769     }
1770 #endif
1771 #if wxMAC_USE_ATSU_TEXT
1772     {
1773         DrawText(str, x, y, 0.0);
1774         return;
1775     }
1776 #endif
1777 #if WXMAC_USE_CG_TEXT
1778     // TODO core graphics text implementation here
1779 #endif
1780 }
1781
1782 void wxMacCoreGraphicsContext::DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle )
1783 {
1784     if ( m_font.IsNull() )
1785         return;
1786
1787     EnsureIsValid();
1788 #if wxMAC_USE_CORE_TEXT
1789     if ( UMAGetSystemVersion() >= 0x1050 )
1790     {
1791         // default implementation takes care of rotation and calls non rotated DrawText afterwards
1792         wxGraphicsContext::DrawText( str, x, y, angle );
1793         return;
1794     }
1795 #endif
1796 #if wxMAC_USE_ATSU_TEXT
1797     {
1798         OSStatus status = noErr;
1799         ATSUTextLayout atsuLayout;
1800         UniCharCount chars = str.length();
1801         UniChar* ubuf = NULL;
1802
1803 #if SIZEOF_WCHAR_T == 4
1804         wxMBConvUTF16 converter;
1805 #if wxUSE_UNICODE
1806         size_t unicharlen = converter.WC2MB( NULL , str.wc_str() , 0 );
1807         ubuf = (UniChar*) malloc( unicharlen + 2 );
1808         converter.WC2MB( (char*) ubuf , str.wc_str(), unicharlen + 2 );
1809 #else
1810         const wxWCharBuffer wchar = str.wc_str( wxConvLocal );
1811         size_t unicharlen = converter.WC2MB( NULL , wchar.data() , 0 );
1812         ubuf = (UniChar*) malloc( unicharlen + 2 );
1813         converter.WC2MB( (char*) ubuf , wchar.data() , unicharlen + 2 );
1814 #endif
1815         chars = unicharlen / 2;
1816 #else
1817 #if wxUSE_UNICODE
1818         ubuf = (UniChar*) str.wc_str();
1819 #else
1820         wxWCharBuffer wchar = str.wc_str( wxConvLocal );
1821         chars = wxWcslen( wchar.data() );
1822         ubuf = (UniChar*) wchar.data();
1823 #endif
1824 #endif
1825
1826         ATSUStyle style = (((wxMacCoreGraphicsFontData*)m_font.GetRefData())->GetATSUStyle());
1827         status = ::ATSUCreateTextLayoutWithTextPtr( (UniCharArrayPtr) ubuf , 0 , chars , chars , 1 ,
1828                                                    &chars , &style , &atsuLayout );
1829
1830         wxASSERT_MSG( status == noErr , wxT("couldn't create the layout of the rotated text") );
1831
1832         status = ::ATSUSetTransientFontMatching( atsuLayout , true );
1833         wxASSERT_MSG( status == noErr , wxT("couldn't setup transient font matching") );
1834
1835         int iAngle = int( angle * RAD2DEG );
1836         if ( abs(iAngle) > 0 )
1837         {
1838             Fixed atsuAngle = IntToFixed( iAngle );
1839             ATSUAttributeTag atsuTags[] =
1840             {
1841                 kATSULineRotationTag ,
1842             };
1843             ByteCount atsuSizes[sizeof(atsuTags) / sizeof(ATSUAttributeTag)] =
1844             {
1845                 sizeof( Fixed ) ,
1846             };
1847             ATSUAttributeValuePtr    atsuValues[sizeof(atsuTags) / sizeof(ATSUAttributeTag)] =
1848             {
1849                 &atsuAngle ,
1850             };
1851             status = ::ATSUSetLayoutControls(atsuLayout , sizeof(atsuTags) / sizeof(ATSUAttributeTag),
1852                                              atsuTags, atsuSizes, atsuValues );
1853         }
1854
1855         {
1856             ATSUAttributeTag atsuTags[] =
1857             {
1858                 kATSUCGContextTag ,
1859             };
1860             ByteCount atsuSizes[sizeof(atsuTags) / sizeof(ATSUAttributeTag)] =
1861             {
1862                 sizeof( CGContextRef ) ,
1863             };
1864             ATSUAttributeValuePtr    atsuValues[sizeof(atsuTags) / sizeof(ATSUAttributeTag)] =
1865             {
1866                 &m_cgContext ,
1867             };
1868             status = ::ATSUSetLayoutControls(atsuLayout , sizeof(atsuTags) / sizeof(ATSUAttributeTag),
1869                                              atsuTags, atsuSizes, atsuValues );
1870         }
1871
1872         ATSUTextMeasurement textBefore, textAfter;
1873         ATSUTextMeasurement ascent, descent;
1874
1875         status = ::ATSUGetUnjustifiedBounds( atsuLayout, kATSUFromTextBeginning, kATSUToTextEnd,
1876                                             &textBefore , &textAfter, &ascent , &descent );
1877
1878         wxASSERT_MSG( status == noErr , wxT("couldn't measure the rotated text") );
1879
1880         Rect rect;
1881         x += (int)(sin(angle) * FixedToInt(ascent));
1882         y += (int)(cos(angle) * FixedToInt(ascent));
1883
1884         status = ::ATSUMeasureTextImage( atsuLayout, kATSUFromTextBeginning, kATSUToTextEnd,
1885                                         IntToFixed(x) , IntToFixed(y) , &rect );
1886         wxASSERT_MSG( status == noErr , wxT("couldn't measure the rotated text") );
1887
1888         CGContextSaveGState(m_cgContext);
1889         CGContextTranslateCTM(m_cgContext, x, y);
1890         CGContextScaleCTM(m_cgContext, 1, -1);
1891         status = ::ATSUDrawText( atsuLayout, kATSUFromTextBeginning, kATSUToTextEnd,
1892                                 IntToFixed(0) , IntToFixed(0) );
1893
1894         wxASSERT_MSG( status == noErr , wxT("couldn't draw the rotated text") );
1895
1896         CGContextRestoreGState(m_cgContext);
1897
1898         ::ATSUDisposeTextLayout(atsuLayout);
1899
1900 #if SIZEOF_WCHAR_T == 4
1901         free( ubuf );
1902 #endif
1903         return;
1904     }
1905 #endif
1906 #if WXMAC_USE_CG_TEXT
1907     // default implementation takes care of rotation and calls non rotated DrawText afterwards
1908     wxGraphicsContext::DrawText( str, x, y, angle );
1909 #endif
1910 }
1911
1912 void wxMacCoreGraphicsContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1913                             wxDouble *descent, wxDouble *externalLeading ) const
1914 {
1915     wxCHECK_RET( !m_font.IsNull(), wxT("wxDC(cg)::DoGetTextExtent - no valid font set") );
1916
1917     if ( width )
1918         *width = 0;
1919     if ( height )
1920         *height = 0;
1921     if ( descent )
1922         *descent = 0;
1923     if ( externalLeading )
1924         *externalLeading = 0;
1925
1926     if (str.empty())
1927         return;
1928
1929 #if wxMAC_USE_CORE_TEXT
1930     if ( UMAGetSystemVersion() >= 0x1050 )
1931     {
1932         wxMacCoreGraphicsFontData* fref = (wxMacCoreGraphicsFontData*)m_font.GetRefData();
1933         CTFontRef font = fref->GetCTFont();
1934
1935         wxMacCFStringHolder text(str, wxLocale::GetSystemEncoding() );
1936         CFStringRef keys[] = { kCTFontAttributeName  };
1937         CFTypeRef values[] = { font };
1938         wxCFRef<CFDictionaryRef> attributes( CFDictionaryCreate(kCFAllocatorDefault, (const void**) &keys, (const void**) &values,
1939                                                                 WXSIZEOF( keys ), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks) );
1940         wxCFRef<CFAttributedStringRef> attrtext( CFAttributedStringCreate(kCFAllocatorDefault, text, attributes) );
1941         wxCFRef<CTLineRef> line( CTLineCreateWithAttributedString(attrtext) );
1942
1943         CGFloat w, a, d, l;
1944
1945         w = CTLineGetTypographicBounds(line, &a, &d, &l) ;
1946
1947         if ( height )
1948             *height = a+d+l;
1949         if ( descent )
1950             *descent = d;
1951         if ( externalLeading )
1952             *externalLeading = l;
1953         if ( width )
1954             *width = w;
1955         return;
1956     }
1957 #endif
1958 #if wxMAC_USE_ATSU_TEXT
1959     {
1960         OSStatus status = noErr;
1961
1962         ATSUTextLayout atsuLayout;
1963         UniCharCount chars = str.length();
1964         UniChar* ubuf = NULL;
1965
1966 #if SIZEOF_WCHAR_T == 4
1967         wxMBConvUTF16 converter;
1968 #if wxUSE_UNICODE
1969         size_t unicharlen = converter.WC2MB( NULL , str.wc_str() , 0 );
1970         ubuf = (UniChar*) malloc( unicharlen + 2 );
1971         converter.WC2MB( (char*) ubuf , str.wc_str(), unicharlen + 2 );
1972 #else
1973         const wxWCharBuffer wchar = str.wc_str( wxConvLocal );
1974         size_t unicharlen = converter.WC2MB( NULL , wchar.data() , 0 );
1975         ubuf = (UniChar*) malloc( unicharlen + 2 );
1976         converter.WC2MB( (char*) ubuf , wchar.data() , unicharlen + 2 );
1977 #endif
1978         chars = unicharlen / 2;
1979 #else
1980 #if wxUSE_UNICODE
1981         ubuf = (UniChar*) str.wc_str();
1982 #else
1983         wxWCharBuffer wchar = str.wc_str( wxConvLocal );
1984         chars = wxWcslen( wchar.data() );
1985         ubuf = (UniChar*) wchar.data();
1986 #endif
1987 #endif
1988
1989         ATSUStyle style = (((wxMacCoreGraphicsFontData*)m_font.GetRefData())->GetATSUStyle());
1990         status = ::ATSUCreateTextLayoutWithTextPtr( (UniCharArrayPtr) ubuf , 0 , chars , chars , 1 ,
1991                                                    &chars , &style , &atsuLayout );
1992
1993         wxASSERT_MSG( status == noErr , wxT("couldn't create the layout of the text") );
1994
1995         ATSUTextMeasurement textBefore, textAfter;
1996         ATSUTextMeasurement textAscent, textDescent;
1997
1998         status = ::ATSUGetUnjustifiedBounds( atsuLayout, kATSUFromTextBeginning, kATSUToTextEnd,
1999                                             &textBefore , &textAfter, &textAscent , &textDescent );
2000
2001         if ( height )
2002             *height = FixedToInt(textAscent + textDescent);
2003         if ( descent )
2004             *descent = FixedToInt(textDescent);
2005         if ( externalLeading )
2006             *externalLeading = 0;
2007         if ( width )
2008             *width = FixedToInt(textAfter - textBefore);
2009
2010         ::ATSUDisposeTextLayout(atsuLayout);
2011 #if SIZEOF_WCHAR_T == 4
2012         free( ubuf ) ;
2013 #endif
2014         return;
2015     }
2016 #endif
2017 #if WXMAC_USE_CG_TEXT
2018     // TODO core graphics text implementation here
2019 #endif
2020 }
2021
2022 void wxMacCoreGraphicsContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
2023 {
2024     widths.Empty();
2025     widths.Add(0, text.length());
2026
2027     if (text.empty())
2028         return;
2029
2030 #if wxMAC_USE_CORE_TEXT
2031     {
2032         wxMacCoreGraphicsFontData* fref = (wxMacCoreGraphicsFontData*)m_font.GetRefData();
2033         CTFontRef font = fref->GetCTFont();
2034
2035         wxMacCFStringHolder t(text, wxLocale::GetSystemEncoding() );
2036         CFStringRef keys[] = { kCTFontAttributeName  };
2037         CFTypeRef values[] = { font };
2038         wxCFRef<CFDictionaryRef> attributes( CFDictionaryCreate(kCFAllocatorDefault, (const void**) &keys, (const void**) &values,
2039                                                                 WXSIZEOF( keys ), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks) );
2040         wxCFRef<CFAttributedStringRef> attrtext( CFAttributedStringCreate(kCFAllocatorDefault, t, attributes) );
2041         wxCFRef<CTLineRef> line( CTLineCreateWithAttributedString(attrtext) );
2042
2043         int chars = text.length();
2044         for ( int pos = 0; pos < (int)chars; pos ++ )
2045         {
2046             widths[pos] = CTLineGetOffsetForStringIndex( line, pos+1 , NULL )+0.5;
2047         }
2048
2049         return;
2050     }
2051 #endif
2052 #if wxMAC_USE_ATSU_TEXT
2053     {
2054         ATSUTextLayout atsuLayout;
2055         UniCharCount chars = text.length();
2056         UniChar* ubuf = NULL;
2057
2058 #if SIZEOF_WCHAR_T == 4
2059         wxMBConvUTF16 converter;
2060 #if wxUSE_UNICODE
2061         size_t unicharlen = converter.WC2MB( NULL , text.wc_str() , 0 );
2062         ubuf = (UniChar*) malloc( unicharlen + 2 );
2063         converter.WC2MB( (char*) ubuf , text.wc_str(), unicharlen + 2 );
2064 #else
2065         const wxWCharBuffer wchar = text.wc_str( wxConvLocal );
2066         size_t unicharlen = converter.WC2MB( NULL , wchar.data() , 0 );
2067         ubuf = (UniChar*) malloc( unicharlen + 2 );
2068         converter.WC2MB( (char*) ubuf , wchar.data() , unicharlen + 2 );
2069 #endif
2070         chars = unicharlen / 2;
2071 #else
2072 #if wxUSE_UNICODE
2073         ubuf = (UniChar*) text.wc_str();
2074 #else
2075         wxWCharBuffer wchar = text.wc_str( wxConvLocal );
2076         chars = wxWcslen( wchar.data() );
2077         ubuf = (UniChar*) wchar.data();
2078 #endif
2079 #endif
2080
2081         ATSUStyle style = (((wxMacCoreGraphicsFontData*)m_font.GetRefData())->GetATSUStyle());
2082         ::ATSUCreateTextLayoutWithTextPtr( (UniCharArrayPtr) ubuf , 0 , chars , chars , 1 ,
2083                                           &chars , &style , &atsuLayout );
2084
2085         for ( int pos = 0; pos < (int)chars; pos ++ )
2086         {
2087             unsigned long actualNumberOfBounds = 0;
2088             ATSTrapezoid glyphBounds;
2089
2090             // We get a single bound, since the text should only require one. If it requires more, there is an issue
2091             OSStatus result;
2092             result = ATSUGetGlyphBounds( atsuLayout, 0, 0, kATSUFromTextBeginning, pos + 1,
2093                                         kATSUseDeviceOrigins, 1, &glyphBounds, &actualNumberOfBounds );
2094             if (result != noErr || actualNumberOfBounds != 1 )
2095                 return;
2096
2097             widths[pos] = FixedToInt( glyphBounds.upperRight.x - glyphBounds.upperLeft.x );
2098             //unsigned char uch = s[i];
2099         }
2100
2101         ::ATSUDisposeTextLayout(atsuLayout);
2102 #if SIZEOF_WCHAR_T == 4
2103         free( ubuf ) ;
2104 #endif
2105     }
2106 #endif
2107 #if WXMAC_USE_CG_TEXT
2108     // TODO core graphics text implementation here
2109 #endif
2110 }
2111
2112 void * wxMacCoreGraphicsContext::GetNativeContext()
2113 {
2114     return m_cgContext;
2115 }
2116
2117 // concatenates this transform with the current transform of this context
2118 void wxMacCoreGraphicsContext::ConcatTransform( const wxGraphicsMatrix& matrix )
2119 {
2120     if ( m_cgContext )
2121         CGContextConcatCTM( m_cgContext, *(CGAffineTransform*) matrix.GetNativeMatrix());
2122     else
2123         m_windowTransform = CGAffineTransformConcat(m_windowTransform, *(CGAffineTransform*) matrix.GetNativeMatrix());
2124 }
2125
2126 // sets the transform of this context
2127 void wxMacCoreGraphicsContext::SetTransform( const wxGraphicsMatrix& matrix )
2128 {
2129     if ( m_cgContext )
2130     {
2131         CGAffineTransform transform = CGContextGetCTM( m_cgContext );
2132         transform = CGAffineTransformInvert( transform ) ;
2133         CGContextConcatCTM( m_cgContext, transform);
2134         CGContextConcatCTM( m_cgContext, *(CGAffineTransform*) matrix.GetNativeMatrix());
2135     }
2136     else
2137     {
2138         m_windowTransform = *(CGAffineTransform*) matrix.GetNativeMatrix();
2139     }
2140 }
2141
2142 // gets the matrix of this context
2143 wxGraphicsMatrix wxMacCoreGraphicsContext::GetTransform() const
2144 {
2145     wxGraphicsMatrix m = CreateMatrix();
2146     *((CGAffineTransform*) m.GetNativeMatrix()) = ( m_cgContext == NULL ? m_windowTransform :
2147         CGContextGetCTM( m_cgContext ));
2148     return m;
2149 }
2150
2151 //
2152 // Renderer
2153 //
2154
2155 //-----------------------------------------------------------------------------
2156 // wxMacCoreGraphicsRenderer declaration
2157 //-----------------------------------------------------------------------------
2158
2159 class WXDLLIMPEXP_CORE wxMacCoreGraphicsRenderer : public wxGraphicsRenderer
2160 {
2161 public :
2162     wxMacCoreGraphicsRenderer() {}
2163
2164     virtual ~wxMacCoreGraphicsRenderer() {}
2165
2166     // Context
2167
2168     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
2169     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
2170
2171     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
2172
2173     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
2174
2175     virtual wxGraphicsContext * CreateContext( wxWindow* window );
2176
2177     virtual wxGraphicsContext * CreateMeasuringContext();
2178
2179     // Path
2180
2181     virtual wxGraphicsPath CreatePath();
2182
2183     // Matrix
2184
2185     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
2186         wxDouble tx=0.0, wxDouble ty=0.0);
2187
2188
2189     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
2190
2191     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
2192
2193     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
2194     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
2195         const wxColour&c1, const wxColour&c2) ;
2196
2197     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
2198     // with radius r and color cColor
2199     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
2200         const wxColour &oColor, const wxColour &cColor) ;
2201
2202    // sets the font
2203     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
2204
2205 private :
2206     DECLARE_DYNAMIC_CLASS_NO_COPY(wxMacCoreGraphicsRenderer)
2207 } ;
2208
2209 //-----------------------------------------------------------------------------
2210 // wxMacCoreGraphicsRenderer implementation
2211 //-----------------------------------------------------------------------------
2212
2213 IMPLEMENT_DYNAMIC_CLASS(wxMacCoreGraphicsRenderer,wxGraphicsRenderer)
2214
2215 static wxMacCoreGraphicsRenderer gs_MacCoreGraphicsRenderer;
2216
2217 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
2218 {
2219     return &gs_MacCoreGraphicsRenderer;
2220 }
2221
2222 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContext( const wxWindowDC& dc )
2223 {
2224     const wxDCImpl* impl = dc.GetImpl();
2225     wxWindowDCImpl *win_impl = wxDynamicCast( impl, wxWindowDCImpl );
2226     if (win_impl)
2227         return new wxMacCoreGraphicsContext( this,
2228            (CGContextRef)(win_impl->GetWindow()->MacGetCGContextRef()) );
2229
2230     return NULL;
2231 }
2232
2233 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContext( const wxMemoryDC& dc )
2234 {
2235     const wxDCImpl* impl = dc.GetImpl();
2236     wxMemoryDCImpl *mem_impl = wxDynamicCast( impl, wxMemoryDCImpl );
2237     if (mem_impl)
2238         return new wxMacCoreGraphicsContext( this,
2239             (CGContextRef)(mem_impl->GetGraphicsContext()->GetNativeContext()) );
2240
2241     return NULL;
2242 }
2243
2244 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContextFromNativeContext( void * context )
2245 {
2246     return new wxMacCoreGraphicsContext(this,(CGContextRef)context);
2247 }
2248
2249
2250 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContextFromNativeWindow( void * window )
2251 {
2252     return new wxMacCoreGraphicsContext(this,(WindowRef)window);
2253 }
2254
2255 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContext( wxWindow* window )
2256 {
2257     return new wxMacCoreGraphicsContext(this, window );
2258 }
2259
2260 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateMeasuringContext()
2261 {
2262     return new wxMacCoreGraphicsContext(this);
2263 }
2264
2265 // Path
2266
2267 wxGraphicsPath wxMacCoreGraphicsRenderer::CreatePath()
2268 {
2269     wxGraphicsPath m;
2270     m.SetRefData( new wxMacCoreGraphicsPathData(this));
2271     return m;
2272 }
2273
2274
2275 // Matrix
2276
2277 wxGraphicsMatrix wxMacCoreGraphicsRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
2278     wxDouble tx, wxDouble ty)
2279 {
2280     wxGraphicsMatrix m;
2281     wxMacCoreGraphicsMatrixData* data = new wxMacCoreGraphicsMatrixData( this );
2282     data->Set( a,b,c,d,tx,ty ) ;
2283     m.SetRefData(data);
2284     return m;
2285 }
2286
2287 wxGraphicsPen wxMacCoreGraphicsRenderer::CreatePen(const wxPen& pen)
2288 {
2289     if ( !pen.Ok() || pen.GetStyle() == wxTRANSPARENT )
2290         return wxNullGraphicsPen;
2291     else
2292     {
2293         wxGraphicsPen p;
2294         p.SetRefData(new wxMacCoreGraphicsPenData( this, pen ));
2295         return p;
2296     }
2297 }
2298
2299 wxGraphicsBrush wxMacCoreGraphicsRenderer::CreateBrush(const wxBrush& brush )
2300 {
2301     if ( !brush.Ok() || brush.GetStyle() == wxTRANSPARENT )
2302         return wxNullGraphicsBrush;
2303     else
2304     {
2305         wxGraphicsBrush p;
2306         p.SetRefData(new wxMacCoreGraphicsBrushData( this, brush ));
2307         return p;
2308     }
2309 }
2310
2311 // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
2312 wxGraphicsBrush wxMacCoreGraphicsRenderer::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
2313     const wxColour&c1, const wxColour&c2)
2314 {
2315     wxGraphicsBrush p;
2316     wxMacCoreGraphicsBrushData* d = new wxMacCoreGraphicsBrushData( this );
2317     d->CreateLinearGradientBrush(x1, y1, x2, y2, c1, c2);
2318     p.SetRefData(d);
2319     return p;
2320 }
2321
2322 // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
2323 // with radius r and color cColor
2324 wxGraphicsBrush wxMacCoreGraphicsRenderer::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
2325     const wxColour &oColor, const wxColour &cColor)
2326 {
2327     wxGraphicsBrush p;
2328     wxMacCoreGraphicsBrushData* d = new wxMacCoreGraphicsBrushData( this );
2329     d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,oColor,cColor);
2330     p.SetRefData(d);
2331     return p;
2332 }
2333
2334 // sets the font
2335 wxGraphicsFont wxMacCoreGraphicsRenderer::CreateFont( const wxFont &font , const wxColour &col )
2336 {
2337     if ( font.Ok() )
2338     {
2339         wxGraphicsFont p;
2340         p.SetRefData(new wxMacCoreGraphicsFontData( this , font, col ));
2341         return p;
2342     }
2343     else
2344         return wxNullGraphicsFont;
2345 }
2346
2347 //
2348 // CoreGraphics Helper Methods
2349 //
2350
2351 // Data Providers and Consumers
2352
2353 size_t UMAPutBytesCFRefCallback( void *info, const void *bytes, size_t count )
2354 {
2355     CFMutableDataRef data = (CFMutableDataRef) info;
2356     if ( data )
2357     {
2358         CFDataAppendBytes( data, (const UInt8*) bytes, count );
2359     }
2360     return count;
2361 }
2362
2363 void wxMacReleaseCFDataProviderCallback(void *info,
2364                                       const void *WXUNUSED(data),
2365                                       size_t WXUNUSED(count))
2366 {
2367     if ( info )
2368         CFRelease( (CFDataRef) info );
2369 }
2370
2371 void wxMacReleaseCFDataConsumerCallback( void *info )
2372 {
2373     if ( info )
2374         CFRelease( (CFDataRef) info );
2375 }
2376
2377 CGDataProviderRef wxMacCGDataProviderCreateWithCFData( CFDataRef data )
2378 {
2379     if ( data == NULL )
2380         return NULL;
2381
2382     return CGDataProviderCreateWithCFData( data );
2383 }
2384
2385 CGDataConsumerRef wxMacCGDataConsumerCreateWithCFData( CFMutableDataRef data )
2386 {
2387     if ( data == NULL )
2388         return NULL;
2389
2390     return CGDataConsumerCreateWithCFData( data );
2391 }
2392
2393 void wxMacReleaseMemoryBufferProviderCallback(void *info, const void *data, size_t WXUNUSED(size))
2394 {
2395     wxMemoryBuffer* membuf = (wxMemoryBuffer*) info ;
2396
2397     wxASSERT( data == membuf->GetData() ) ;
2398
2399     delete membuf ;
2400 }
2401
2402 CGDataProviderRef wxMacCGDataProviderCreateWithMemoryBuffer( const wxMemoryBuffer& buf )
2403 {
2404     wxMemoryBuffer* b = new wxMemoryBuffer( buf );
2405     if ( b->GetDataLen() == 0 )
2406         return NULL;
2407
2408     return CGDataProviderCreateWithData( b , (const void *) b->GetData() , b->GetDataLen() ,
2409                                                  wxMacReleaseMemoryBufferProviderCallback );
2410 }