src/osx/carbon/graphics.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/carbon/graphics.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 #include "wx/private/graphics.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/dcclient.h"
  19     #include "wx/dcmemory.h"
  20     #include "wx/dcprint.h"
  21     #include "wx/log.h"
  22     #include "wx/region.h"
  23     #include "wx/image.h"
  24     #include "wx/icon.h"
  25 #endif
  26
  27
  28 #ifdef __MSL__
  29     #if __MSL__ >= 0x6000
  30         #include "math.h"
  31         // in case our functions were defined outside std, we make it known all the same
  32         namespace std { }
  33         using namespace std;
  34     #endif
  35 #endif
  36
  37 #ifdef __WXMAC__
  38     #include "wx/osx/private.h"
  39     #include "wx/osx/dcprint.h"
  40     #include "wx/osx/dcclient.h"
  41     #include "wx/osx/dcmemory.h"
  42     #include "wx/osx/private.h"
  43 #else
  44     #include "CoreServices/CoreServices.h"
  45     #include "ApplicationServices/ApplicationServices.h"
  46     #include "wx/osx/core/cfstring.h"
  47     #include "wx/cocoa/dcclient.h"
  48 #endif
  49
  50 #ifdef __WXCOCOA__
  51
  52 CGColorSpaceRef wxMacGetGenericRGBColorSpace()
  53 {
  54     static wxCFRef<CGColorSpaceRef> genericRGBColorSpace;
  55
  56     if (genericRGBColorSpace == NULL)
  57     {
  58         genericRGBColorSpace.reset( CGColorSpaceCreateWithName( kCGColorSpaceGenericRGB ) );
  59     }
  60
  61     return genericRGBColorSpace;
  62 }
  63
  64 int UMAGetSystemVersion()
  65 {
  66     return 0x1050;
  67 }
  68
  69
  70 #define wxOSX_USE_CORE_TEXT 1
  71
  72 #endif
  73
  74 #if wxOSX_USE_COCOA_OR_IPHONE
  75 extern CGContextRef wxOSXGetContextFromCurrentContext() ;
  76 #if wxOSX_USE_COCOA
  77 extern bool wxOSXLockFocus( WXWidget view) ;
  78 extern void wxOSXUnlockFocus( WXWidget view) ;
  79 #endif
  80 #endif
  81
  82 #if 1 // MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5
  83
  84 // TODO test whether this private API also works under 10.3
  85
  86 // copying values from NSCompositingModes (see also webkit and cairo sources)
  87
  88 typedef enum CGCompositeOperation {
  89    kCGCompositeOperationClear           = 0,
  90    kCGCompositeOperationCopy            = 1,
  91    kCGCompositeOperationSourceOver      = 2,
  92    kCGCompositeOperationSourceIn        = 3,
  93    kCGCompositeOperationSourceOut       = 4,
  94    kCGCompositeOperationSourceAtop      = 5,
  95    kCGCompositeOperationDestinationOver = 6,
  96    kCGCompositeOperationDestinationIn   = 7,
  97    kCGCompositeOperationDestinationOut  = 8,
  98    kCGCompositeOperationDestinationAtop = 9,
  99    kCGCompositeOperationXOR             = 10,
 100    kCGCompositeOperationPlusDarker      = 11,
 101 // NS only, unsupported by CG : Highlight
 102    kCGCompositeOperationPlusLighter     = 12
 103 } CGCompositeOperation ;
 104
 105 extern "C"
 106 {
 107    CG_EXTERN void CGContextSetCompositeOperation (CGContextRef context, int operation);
 108 } ;
 109
 110 #endif
 111
 112 //-----------------------------------------------------------------------------
 113 // constants
 114 //-----------------------------------------------------------------------------
 115
 116 #if !defined( __DARWIN__ ) || defined(__MWERKS__)
 117 #ifndef M_PI
 118 const double M_PI = 3.14159265358979;
 119 #endif
 120 #endif
 121
 122 static const double RAD2DEG = 180.0 / M_PI;
 123
 124 //
 125 // Pen, Brushes and Fonts
 126 //
 127
 128 #pragma mark -
 129 #pragma mark wxMacCoreGraphicsPattern, ImagePattern, HatchPattern classes
 130
 131 OSStatus wxMacDrawCGImage(
 132                   CGContextRef    inContext,
 133                   const CGRect *  inBounds,
 134                   CGImageRef      inImage)
 135 {
 136 #if wxOSX_USE_CARBON
 137     return HIViewDrawCGImage( inContext, inBounds, inImage );
 138 #else
 139     CGContextSaveGState(inContext);
 140     CGContextTranslateCTM(inContext, inBounds->origin.x, inBounds->origin.y + inBounds->size.height);
 141     CGRect r = *inBounds;
 142     r.origin.x = r.origin.y = 0;
 143     CGContextScaleCTM(inContext, 1, -1);
 144     CGContextDrawImage(inContext, r, inImage );
 145     CGContextRestoreGState(inContext);
 146     return noErr;
 147 #endif
 148 }
 149
 150 CGColorRef wxMacCreateCGColor( const wxColour& col )
 151 {
 152     CGColorRef retval = 0;
 153 #ifdef __WXMAC__
 154     retval = col.CreateCGColor();
 155 #else
 156 // TODO add conversion NSColor - CGColorRef (obj-c)
 157 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
 158     if ( CGColorCreateGenericRGB )
 159         retval = CGColorCreateGenericRGB( col.Red() / 255.0 , col.Green() / 255.0, col.Blue() / 255.0, col.Alpha() / 255.0 );
 160     else
 161 #endif
 162     {
 163         CGFloat components[4] = { col.Red() / 255.0, col.Green() / 255.0, col.Blue()  / 255.0, col.Alpha() / 255.0 } ;
 164         retval = CGColorCreate( wxMacGetGenericRGBColorSpace() , components ) ;
 165     }
 166
 167 #endif
 168     return retval;
 169 }
 170
 171 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5 && wxOSX_USE_CORE_TEXT
 172
 173 CTFontRef wxMacCreateCTFont( const wxFont& font )
 174 {
 175 #ifdef __WXMAC__
 176     return wxCFRetain((CTFontRef) font.OSXGetCTFont());
 177 #else
 178     return CTFontCreateWithName( wxCFStringRef( font.GetFaceName(), wxLocale::GetSystemEncoding() ) , font.GetPointSize() , NULL );
 179 #endif
 180 }
 181
 182 #endif
 183
 184 // CGPattern wrapper class: always allocate on heap, never call destructor
 185
 186 class wxMacCoreGraphicsPattern
 187 {
 188 public :
 189     wxMacCoreGraphicsPattern() {}
 190
 191     // is guaranteed to be called only with a non-Null CGContextRef
 192     virtual void Render( CGContextRef ctxRef ) = 0;
 193
 194     operator CGPatternRef() const { return m_patternRef; }
 195
 196 protected :
 197     virtual ~wxMacCoreGraphicsPattern()
 198     {
 199         // as this is called only when the m_patternRef is been released;
 200         // don't release it again
 201     }
 202
 203     static void _Render( void *info, CGContextRef ctxRef )
 204     {
 205         wxMacCoreGraphicsPattern* self = (wxMacCoreGraphicsPattern*) info;
 206         if ( self && ctxRef )
 207             self->Render( ctxRef );
 208     }
 209
 210     static void _Dispose( void *info )
 211     {
 212         wxMacCoreGraphicsPattern* self = (wxMacCoreGraphicsPattern*) info;
 213         delete self;
 214     }
 215
 216     CGPatternRef m_patternRef;
 217
 218     static const CGPatternCallbacks ms_Callbacks;
 219 };
 220
 221 const CGPatternCallbacks wxMacCoreGraphicsPattern::ms_Callbacks = { 0, &wxMacCoreGraphicsPattern::_Render, &wxMacCoreGraphicsPattern::_Dispose };
 222
 223 class ImagePattern : public wxMacCoreGraphicsPattern
 224 {
 225 public :
 226     ImagePattern( const wxBitmap* bmp , const CGAffineTransform& transform )
 227     {
 228         wxASSERT( bmp && bmp->IsOk() );
 229 #ifdef __WXMAC__
 230         Init( (CGImageRef) bmp->CreateCGImage() , transform );
 231 #endif
 232     }
 233
 234     // ImagePattern takes ownership of CGImageRef passed in
 235     ImagePattern( CGImageRef image , const CGAffineTransform& transform )
 236     {
 237         if ( image )
 238             CFRetain( image );
 239
 240         Init( image , transform );
 241     }
 242
 243     virtual void Render( CGContextRef ctxRef )
 244     {
 245         if (m_image != NULL)
 246             wxMacDrawCGImage( ctxRef, &m_imageBounds, m_image );
 247     }
 248
 249 protected :
 250     void Init( CGImageRef image, const CGAffineTransform& transform )
 251     {
 252         m_image = image;
 253         if ( m_image )
 254         {
 255             m_imageBounds = CGRectMake( (CGFloat) 0.0, (CGFloat) 0.0, (CGFloat)CGImageGetWidth( m_image ), (CGFloat)CGImageGetHeight( m_image ) );
 256             m_patternRef = CGPatternCreate(
 257                 this , m_imageBounds, transform ,
 258                 m_imageBounds.size.width, m_imageBounds.size.height,
 259                 kCGPatternTilingNoDistortion, true , &wxMacCoreGraphicsPattern::ms_Callbacks );
 260         }
 261     }
 262
 263     virtual ~ImagePattern()
 264     {
 265         if ( m_image )
 266             CGImageRelease( m_image );
 267     }
 268
 269     CGImageRef m_image;
 270     CGRect m_imageBounds;
 271 };
 272
 273 class HatchPattern : public wxMacCoreGraphicsPattern
 274 {
 275 public :
 276     HatchPattern( int hatchstyle, const CGAffineTransform& transform )
 277     {
 278         m_hatch = hatchstyle;
 279         m_imageBounds = CGRectMake( (CGFloat) 0.0, (CGFloat) 0.0, (CGFloat) 8.0 , (CGFloat) 8.0 );
 280         m_patternRef = CGPatternCreate(
 281             this , m_imageBounds, transform ,
 282             m_imageBounds.size.width, m_imageBounds.size.height,
 283             kCGPatternTilingNoDistortion, false , &wxMacCoreGraphicsPattern::ms_Callbacks );
 284     }
 285
 286     void StrokeLineSegments( CGContextRef ctxRef , const CGPoint pts[] , size_t count )
 287     {
 288         CGContextStrokeLineSegments( ctxRef , pts , count );
 289     }
 290
 291     virtual void Render( CGContextRef ctxRef )
 292     {
 293         switch ( m_hatch )
 294         {
 295             case wxBDIAGONAL_HATCH :
 296                 {
 297                     CGPoint pts[] =
 298                     {
 299                     { (CGFloat) 8.0 , (CGFloat) 0.0 } , { (CGFloat) 0.0 , (CGFloat) 8.0 }
 300                     };
 301                     StrokeLineSegments( ctxRef , pts , 2 );
 302                 }
 303                 break;
 304
 305             case wxCROSSDIAG_HATCH :
 306                 {
 307                     CGPoint pts[] =
 308                     {
 309                         { (CGFloat) 0.0 , (CGFloat) 0.0 } , { (CGFloat) 8.0 , (CGFloat) 8.0 } ,
 310                         { (CGFloat) 8.0 , (CGFloat) 0.0 } , { (CGFloat) 0.0 , (CGFloat) 8.0 }
 311                     };
 312                     StrokeLineSegments( ctxRef , pts , 4 );
 313                 }
 314                 break;
 315
 316             case wxFDIAGONAL_HATCH :
 317                 {
 318                     CGPoint pts[] =
 319                     {
 320                     { (CGFloat) 0.0 , (CGFloat) 0.0 } , { (CGFloat) 8.0 , (CGFloat) 8.0 }
 321                     };
 322                     StrokeLineSegments( ctxRef , pts , 2 );
 323                 }
 324                 break;
 325
 326             case wxCROSS_HATCH :
 327                 {
 328                     CGPoint pts[] =
 329                     {
 330                     { (CGFloat) 0.0 , (CGFloat) 4.0 } , { (CGFloat) 8.0 , (CGFloat) 4.0 } ,
 331                     { (CGFloat) 4.0 , (CGFloat) 0.0 } , { (CGFloat) 4.0 , (CGFloat) 8.0 } ,
 332                     };
 333                     StrokeLineSegments( ctxRef , pts , 4 );
 334                 }
 335                 break;
 336
 337             case wxHORIZONTAL_HATCH :
 338                 {
 339                     CGPoint pts[] =
 340                     {
 341                     { (CGFloat) 0.0 , (CGFloat) 4.0 } , { (CGFloat) 8.0 , (CGFloat) 4.0 } ,
 342                     };
 343                     StrokeLineSegments( ctxRef , pts , 2 );
 344                 }
 345                 break;
 346
 347             case wxVERTICAL_HATCH :
 348                 {
 349                     CGPoint pts[] =
 350                     {
 351                     { (CGFloat) 4.0 , (CGFloat) 0.0 } , { (CGFloat) 4.0 , (CGFloat) 8.0 } ,
 352                     };
 353                     StrokeLineSegments( ctxRef , pts , 2 );
 354                 }
 355                 break;
 356
 357             default:
 358                 break;
 359         }
 360     }
 361
 362 protected :
 363     virtual ~HatchPattern() {}
 364
 365     CGRect      m_imageBounds;
 366     int         m_hatch;
 367 };
 368
 369 class wxMacCoreGraphicsPenData : public wxGraphicsObjectRefData
 370 {
 371 public:
 372     wxMacCoreGraphicsPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 373     ~wxMacCoreGraphicsPenData();
 374
 375     void Init();
 376     virtual void Apply( wxGraphicsContext* context );
 377     virtual wxDouble GetWidth() { return m_width; }
 378
 379 protected :
 380     CGLineCap m_cap;
 381     wxCFRef<CGColorRef> m_color;
 382     wxCFRef<CGColorSpaceRef> m_colorSpace;
 383
 384     CGLineJoin m_join;
 385     CGFloat m_width;
 386
 387     int m_count;
 388     const CGFloat *m_lengths;
 389     CGFloat *m_userLengths;
 390
 391
 392     bool m_isPattern;
 393     wxCFRef<CGPatternRef> m_pattern;
 394     CGFloat* m_patternColorComponents;
 395 };
 396
 397 wxMacCoreGraphicsPenData::wxMacCoreGraphicsPenData( wxGraphicsRenderer* renderer, const wxPen &pen ) :
 398     wxGraphicsObjectRefData( renderer )
 399 {
 400     Init();
 401
 402     m_color.reset( wxMacCreateCGColor( pen.GetColour() ) ) ;
 403
 404     // TODO: * m_dc->m_scaleX
 405     m_width = pen.GetWidth();
 406     if (m_width <= 0.0)
 407         m_width = (CGFloat) 0.1;
 408
 409     switch ( pen.GetCap() )
 410     {
 411         case wxCAP_ROUND :
 412             m_cap = kCGLineCapRound;
 413             break;
 414
 415         case wxCAP_PROJECTING :
 416             m_cap = kCGLineCapSquare;
 417             break;
 418
 419         case wxCAP_BUTT :
 420             m_cap = kCGLineCapButt;
 421             break;
 422
 423         default :
 424             m_cap = kCGLineCapButt;
 425             break;
 426     }
 427
 428     switch ( pen.GetJoin() )
 429     {
 430         case wxJOIN_BEVEL :
 431             m_join = kCGLineJoinBevel;
 432             break;
 433
 434         case wxJOIN_MITER :
 435             m_join = kCGLineJoinMiter;
 436             break;
 437
 438         case wxJOIN_ROUND :
 439             m_join = kCGLineJoinRound;
 440             break;
 441
 442         default :
 443             m_join = kCGLineJoinMiter;
 444             break;
 445     }
 446
 447     const CGFloat dashUnit = m_width < 1.0 ? (CGFloat) 1.0 : m_width;
 448
 449     const CGFloat dotted[] = { (CGFloat) dashUnit , (CGFloat) (dashUnit + 2.0) };
 450     static const CGFloat short_dashed[] = { (CGFloat) 9.0 , (CGFloat) 6.0 };
 451     static const CGFloat dashed[] = { (CGFloat) 19.0 , (CGFloat) 9.0 };
 452     static const CGFloat dotted_dashed[] = { (CGFloat) 9.0 , (CGFloat) 6.0 , (CGFloat) 3.0 , (CGFloat) 3.0 };
 453
 454     switch ( pen.GetStyle() )
 455     {
 456         case wxPENSTYLE_SOLID:
 457             break;
 458
 459         case wxPENSTYLE_DOT:
 460             m_count = WXSIZEOF(dotted);
 461             m_userLengths = new CGFloat[ m_count ] ;
 462             memcpy( m_userLengths, dotted, sizeof(dotted) );
 463             m_lengths = m_userLengths;
 464             break;
 465
 466         case wxPENSTYLE_LONG_DASH:
 467             m_count = WXSIZEOF(dashed);
 468             m_lengths = dashed;
 469             break;
 470
 471         case wxPENSTYLE_SHORT_DASH:
 472             m_count = WXSIZEOF(short_dashed);
 473             m_lengths = short_dashed;
 474             break;
 475
 476         case wxPENSTYLE_DOT_DASH:
 477             m_count = WXSIZEOF(dotted_dashed);
 478             m_lengths = dotted_dashed;
 479             break;
 480
 481         case wxPENSTYLE_USER_DASH:
 482             wxDash *dashes;
 483             m_count = pen.GetDashes( &dashes );
 484             if ((dashes != NULL) && (m_count > 0))
 485             {
 486                 m_userLengths = new CGFloat[m_count];
 487                 for ( int i = 0; i < m_count; ++i )
 488                 {
 489                     m_userLengths[i] = dashes[i] * dashUnit;
 490
 491                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 492                         m_userLengths[i] = (CGFloat) (dashUnit + 2.0);
 493                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 494                         m_userLengths[i] = dashUnit;
 495                 }
 496             }
 497             m_lengths = m_userLengths;
 498             break;
 499
 500         case wxPENSTYLE_STIPPLE:
 501             {
 502                 wxBitmap* bmp = pen.GetStipple();
 503                 if ( bmp && bmp->IsOk() )
 504                 {
 505                     m_colorSpace.reset( CGColorSpaceCreatePattern( NULL ) );
 506                     m_pattern.reset( (CGPatternRef) *( new ImagePattern( bmp , CGAffineTransformMakeScale( 1,-1 ) ) ) );
 507                     m_patternColorComponents = new CGFloat[1] ;
 508                     m_patternColorComponents[0] = (CGFloat) 1.0;
 509                     m_isPattern = true;
 510                 }
 511             }
 512             break;
 513
 514         default :
 515             {
 516                 m_isPattern = true;
 517                 m_colorSpace.reset( CGColorSpaceCreatePattern( wxMacGetGenericRGBColorSpace() ) );
 518                 m_pattern.reset( (CGPatternRef) *( new HatchPattern( pen.GetStyle() , CGAffineTransformMakeScale( 1,-1 ) ) ) );
 519                 m_patternColorComponents = new CGFloat[4] ;
 520                 m_patternColorComponents[0] = (CGFloat) (pen.GetColour().Red() / 255.0);
 521                 m_patternColorComponents[1] = (CGFloat) (pen.GetColour().Green() / 255.0);
 522                 m_patternColorComponents[2] = (CGFloat) (pen.GetColour().Blue() / 255.0);
 523                 m_patternColorComponents[3] =  (CGFloat) (pen.GetColour().Alpha() / 255.0);
 524             }
 525             break;
 526     }
 527     if ((m_lengths != NULL) && (m_count > 0))
 528     {
 529         // force the line cap, otherwise we get artifacts (overlaps) and just solid lines
 530         m_cap = kCGLineCapButt;
 531     }
 532 }
 533
 534 wxMacCoreGraphicsPenData::~wxMacCoreGraphicsPenData()
 535 {
 536     delete[] m_userLengths;
 537     delete[] m_patternColorComponents;
 538 }
 539
 540 void wxMacCoreGraphicsPenData::Init()
 541 {
 542     m_lengths = NULL;
 543     m_userLengths = NULL;
 544     m_width = 0;
 545     m_count = 0;
 546     m_patternColorComponents = NULL;
 547     m_isPattern = false;
 548 }
 549
 550 void wxMacCoreGraphicsPenData::Apply( wxGraphicsContext* context )
 551 {
 552     CGContextRef cg = (CGContextRef) context->GetNativeContext();
 553     CGContextSetLineWidth( cg , m_width );
 554     CGContextSetLineJoin( cg , m_join );
 555
 556     CGContextSetLineDash( cg , 0 , m_lengths , m_count );
 557     CGContextSetLineCap( cg , m_cap );
 558
 559     if ( m_isPattern )
 560     {
 561         CGAffineTransform matrix = CGContextGetCTM( cg );
 562         CGContextSetPatternPhase( cg, CGSizeMake(matrix.tx, matrix.ty) );
 563         CGContextSetStrokeColorSpace( cg , m_colorSpace );
 564         CGContextSetStrokePattern( cg, m_pattern , m_patternColorComponents );
 565     }
 566     else
 567     {
 568         CGContextSetStrokeColorWithColor( cg , m_color );
 569     }
 570 }
 571
 572 //
 573 // Brush
 574 //
 575
 576 // make sure we all use one class for all conversions from wx to native colour
 577
 578 class wxMacCoreGraphicsColour
 579 {
 580     public:
 581         wxMacCoreGraphicsColour();
 582         wxMacCoreGraphicsColour(const wxBrush &brush);
 583         ~wxMacCoreGraphicsColour();
 584
 585         void Apply( CGContextRef cgContext );
 586     protected:
 587         void Init();
 588         wxCFRef<CGColorRef> m_color;
 589         wxCFRef<CGColorSpaceRef> m_colorSpace;
 590
 591         bool m_isPattern;
 592         wxCFRef<CGPatternRef> m_pattern;
 593         CGFloat* m_patternColorComponents;
 594 } ;
 595
 596 wxMacCoreGraphicsColour::~wxMacCoreGraphicsColour()
 597 {
 598     delete[] m_patternColorComponents;
 599 }
 600
 601 void wxMacCoreGraphicsColour::Init()
 602 {
 603     m_isPattern = false;
 604     m_patternColorComponents = NULL;
 605 }
 606
 607 void wxMacCoreGraphicsColour::Apply( CGContextRef cgContext )
 608 {
 609     if ( m_isPattern )
 610     {
 611         CGAffineTransform matrix = CGContextGetCTM( cgContext );
 612         CGContextSetPatternPhase( cgContext, CGSizeMake(matrix.tx, matrix.ty) );
 613         CGContextSetFillColorSpace( cgContext , m_colorSpace );
 614         CGContextSetFillPattern( cgContext, m_pattern , m_patternColorComponents );
 615     }
 616     else
 617     {
 618         CGContextSetFillColorWithColor( cgContext, m_color );
 619     }
 620 }
 621
 622 wxMacCoreGraphicsColour::wxMacCoreGraphicsColour()
 623 {
 624     Init();
 625 }
 626
 627 wxMacCoreGraphicsColour::wxMacCoreGraphicsColour( const wxBrush &brush )
 628 {
 629     Init();
 630     if ( brush.GetStyle() == wxSOLID )
 631     {
 632         m_color.reset( wxMacCreateCGColor( brush.GetColour() ));
 633     }
 634     else if ( brush.IsHatch() )
 635     {
 636         m_isPattern = true;
 637         m_colorSpace.reset( CGColorSpaceCreatePattern( wxMacGetGenericRGBColorSpace() ) );
 638         m_pattern.reset( (CGPatternRef) *( new HatchPattern( brush.GetStyle() , CGAffineTransformMakeScale( 1,-1 ) ) ) );
 639
 640         m_patternColorComponents = new CGFloat[4] ;
 641         m_patternColorComponents[0] = (CGFloat) (brush.GetColour().Red() / 255.0);
 642         m_patternColorComponents[1] = (CGFloat) (brush.GetColour().Green() / 255.0);
 643         m_patternColorComponents[2] = (CGFloat) (brush.GetColour().Blue() / 255.0);
 644         m_patternColorComponents[3] = (CGFloat) (brush.GetColour().Alpha() / 255.0);
 645     }
 646     else
 647     {
 648         // now brush is a bitmap
 649         wxBitmap* bmp = brush.GetStipple();
 650         if ( bmp && bmp->IsOk() )
 651         {
 652             m_isPattern = true;
 653             m_patternColorComponents = new CGFloat[1] ;
 654             m_patternColorComponents[0] = (CGFloat) 1.0;
 655             m_colorSpace.reset( CGColorSpaceCreatePattern( NULL ) );
 656             m_pattern.reset( (CGPatternRef) *( new ImagePattern( bmp , CGAffineTransformMakeScale( 1,-1 ) ) ) );
 657         }
 658     }
 659 }
 660
 661 class wxMacCoreGraphicsBrushData : public wxGraphicsObjectRefData
 662 {
 663 public:
 664     wxMacCoreGraphicsBrushData( wxGraphicsRenderer* renderer );
 665     wxMacCoreGraphicsBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 666     ~wxMacCoreGraphicsBrushData ();
 667
 668     virtual void Apply( wxGraphicsContext* context );
 669     void CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 670                                    wxDouble x2, wxDouble y2,
 671                                    const wxGraphicsGradientStops& stops);
 672     void CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 673                                    wxDouble xc, wxDouble yc, wxDouble radius,
 674                                    const wxGraphicsGradientStops& stops);
 675
 676     virtual bool IsShading() { return m_isShading; }
 677     CGShadingRef GetShading() { return m_shading; }
 678 protected:
 679     CGFunctionRef CreateGradientFunction(const wxGraphicsGradientStops& stops);
 680
 681     static void CalculateShadingValues (void *info, const CGFloat *in, CGFloat *out);
 682     virtual void Init();
 683
 684     wxMacCoreGraphicsColour m_cgColor;
 685
 686     bool m_isShading;
 687     CGFunctionRef m_gradientFunction;
 688     CGShadingRef m_shading;
 689
 690     // information about a single gradient component
 691     struct GradientComponent
 692     {
 693         CGFloat pos;
 694         CGFloat red;
 695         CGFloat green;
 696         CGFloat blue;
 697         CGFloat alpha;
 698     };
 699
 700     // and information about all of them
 701     struct GradientComponents
 702     {
 703         GradientComponents()
 704         {
 705             count = 0;
 706             comps = NULL;
 707         }
 708
 709         void Init(unsigned count_)
 710         {
 711             count = count_;
 712             comps = new GradientComponent[count];
 713         }
 714
 715         ~GradientComponents()
 716         {
 717             delete [] comps;
 718         }
 719
 720         unsigned count;
 721         GradientComponent *comps;
 722     };
 723
 724     GradientComponents m_gradientComponents;
 725 };
 726
 727 wxMacCoreGraphicsBrushData::wxMacCoreGraphicsBrushData( wxGraphicsRenderer* renderer) : wxGraphicsObjectRefData( renderer )
 728 {
 729     Init();
 730 }
 731
 732 void
 733 wxMacCoreGraphicsBrushData::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 734                                                       wxDouble x2, wxDouble y2,
 735                                                       const wxGraphicsGradientStops& stops)
 736 {
 737     m_gradientFunction = CreateGradientFunction(stops);
 738     m_shading = CGShadingCreateAxial( wxMacGetGenericRGBColorSpace(), CGPointMake((CGFloat) x1, (CGFloat) y1),
 739                                         CGPointMake((CGFloat) x2,(CGFloat) y2), m_gradientFunction, true, true ) ;
 740     m_isShading = true ;
 741 }
 742
 743 void
 744 wxMacCoreGraphicsBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 745                                                       wxDouble xc, wxDouble yc,
 746                                                       wxDouble radius,
 747                                                       const wxGraphicsGradientStops& stops)
 748 {
 749     m_gradientFunction = CreateGradientFunction(stops);
 750     m_shading = CGShadingCreateRadial( wxMacGetGenericRGBColorSpace(), CGPointMake((CGFloat) xo,(CGFloat) yo), 0,
 751                                         CGPointMake((CGFloat) xc,(CGFloat) yc), (CGFloat) radius, m_gradientFunction, true, true ) ;
 752     m_isShading = true ;
 753 }
 754
 755 wxMacCoreGraphicsBrushData::wxMacCoreGraphicsBrushData(wxGraphicsRenderer* renderer, const wxBrush &brush) : wxGraphicsObjectRefData( renderer ),
 756     m_cgColor( brush )
 757 {
 758     Init();
 759
 760 }
 761
 762 wxMacCoreGraphicsBrushData::~wxMacCoreGraphicsBrushData()
 763 {
 764     if ( m_shading )
 765         CGShadingRelease(m_shading);
 766
 767     if( m_gradientFunction )
 768         CGFunctionRelease(m_gradientFunction);
 769 }
 770
 771 void wxMacCoreGraphicsBrushData::Init()
 772 {
 773     m_gradientFunction = NULL;
 774     m_shading = NULL;
 775     m_isShading = false;
 776 }
 777
 778 void wxMacCoreGraphicsBrushData::Apply( wxGraphicsContext* context )
 779 {
 780     CGContextRef cg = (CGContextRef) context->GetNativeContext();
 781
 782     if ( m_isShading )
 783     {
 784         // nothing to set as shades are processed by clipping using the path and filling
 785     }
 786     else
 787     {
 788         m_cgColor.Apply( cg );
 789     }
 790 }
 791
 792 void wxMacCoreGraphicsBrushData::CalculateShadingValues (void *info, const CGFloat *in, CGFloat *out)
 793 {
 794     const GradientComponents& stops = *(GradientComponents*) info ;
 795
 796     CGFloat f = *in;
 797     if (f <= 0.0)
 798     {
 799         // Start
 800         out[0] = stops.comps[0].red;
 801         out[1] = stops.comps[0].green;
 802         out[2] = stops.comps[0].blue;
 803         out[3] = stops.comps[0].alpha;
 804     }
 805     else if (f >= 1.0)
 806     {
 807         // end
 808         out[0] = stops.comps[stops.count - 1].red;
 809         out[1] = stops.comps[stops.count - 1].green;
 810         out[2] = stops.comps[stops.count - 1].blue;
 811         out[3] = stops.comps[stops.count - 1].alpha;
 812     }
 813     else
 814     {
 815         // Find first component with position greater than f
 816         unsigned i;
 817         for ( i = 0; i < stops.count; i++ )
 818         {
 819             if (stops.comps[i].pos > f)
 820                 break;
 821         }
 822
 823         // Interpolated between stops
 824         CGFloat diff = (f - stops.comps[i-1].pos);
 825         CGFloat range = (stops.comps[i].pos - stops.comps[i-1].pos);
 826         CGFloat fact = diff / range;
 827
 828         out[0] = stops.comps[i - 1].red + (stops.comps[i].red - stops.comps[i - 1].red) * fact;
 829         out[1] = stops.comps[i - 1].green + (stops.comps[i].green - stops.comps[i - 1].green) * fact;
 830         out[2] = stops.comps[i - 1].blue + (stops.comps[i].blue - stops.comps[i - 1].blue) * fact;
 831         out[3] = stops.comps[i - 1].alpha + (stops.comps[i].alpha - stops.comps[i - 1].alpha) * fact;
 832     }
 833 }
 834
 835 CGFunctionRef
 836 wxMacCoreGraphicsBrushData::CreateGradientFunction(const wxGraphicsGradientStops& stops)
 837 {
 838
 839     static const CGFunctionCallbacks callbacks = { 0, &CalculateShadingValues, NULL };
 840     static const CGFloat input_value_range [2] = { 0, 1 };
 841     static const CGFloat output_value_ranges [8] = { 0, 1, 0, 1, 0, 1, 0, 1 };
 842
 843     m_gradientComponents.Init(stops.GetCount());
 844     for ( unsigned i = 0; i < m_gradientComponents.count; i++ )
 845     {
 846         const wxGraphicsGradientStop stop = stops.Item(i);
 847
 848         m_gradientComponents.comps[i].pos = stop.GetPosition();
 849
 850         const wxColour col = stop.GetColour();
 851         m_gradientComponents.comps[i].red = (CGFloat) (col.Red() / 255.0);
 852         m_gradientComponents.comps[i].green = (CGFloat) (col.Green() / 255.0);
 853         m_gradientComponents.comps[i].blue = (CGFloat) (col.Blue() / 255.0);
 854         m_gradientComponents.comps[i].alpha = (CGFloat) (col.Alpha() / 255.0);
 855     }
 856
 857     return CGFunctionCreate ( &m_gradientComponents,  1,
 858                             input_value_range,
 859                             4,
 860                             output_value_ranges,
 861                             &callbacks);
 862 }
 863
 864 //
 865 // Font
 866 //
 867
 868 #if wxOSX_USE_IPHONE
 869
 870 extern UIFont* CreateUIFont( const wxFont& font );
 871 extern void DrawTextInContext( CGContextRef context, CGPoint where, UIFont *font, NSString* text );
 872 extern CGSize MeasureTextInContext( UIFont *font, NSString* text );
 873
 874 #endif
 875
 876 class wxMacCoreGraphicsFontData : public wxGraphicsObjectRefData
 877 {
 878 public:
 879     wxMacCoreGraphicsFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col );
 880     ~wxMacCoreGraphicsFontData();
 881
 882 #if wxOSX_USE_ATSU_TEXT
 883     virtual ATSUStyle GetATSUStyle() { return m_macATSUIStyle; }
 884 #endif
 885 #if wxOSX_USE_CORE_TEXT
 886     CTFontRef OSXGetCTFont() const { return m_ctFont ; }
 887 #endif
 888     wxColour GetColour() const { return m_colour ; }
 889
 890     bool GetUnderlined() const { return m_underlined ; }
 891 #if wxOSX_USE_IPHONE
 892     UIFont* GetUIFont() const { return m_uiFont; }
 893 #endif
 894 private :
 895     wxColour m_colour;
 896     bool m_underlined;
 897 #if wxOSX_USE_ATSU_TEXT
 898     ATSUStyle m_macATSUIStyle;
 899 #endif
 900 #if wxOSX_USE_CORE_TEXT
 901     wxCFRef< CTFontRef > m_ctFont;
 902 #endif
 903 #if wxOSX_USE_IPHONE
 904     UIFont*  m_uiFont;
 905 #endif
 906 };
 907
 908 wxMacCoreGraphicsFontData::wxMacCoreGraphicsFontData(wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col) : wxGraphicsObjectRefData( renderer )
 909 {
 910     m_colour = col;
 911     m_underlined = font.GetUnderlined();
 912
 913 #if wxOSX_USE_CORE_TEXT
 914     m_ctFont.reset( wxMacCreateCTFont( font ) );
 915 #endif
 916 #if wxOSX_USE_IPHONE
 917     m_uiFont = CreateUIFont(font);
 918     wxMacCocoaRetain( m_uiFont );
 919 #endif
 920 #if wxOSX_USE_ATSU_TEXT
 921     OSStatus status = noErr;
 922     m_macATSUIStyle = NULL;
 923
 924     status = ATSUCreateAndCopyStyle( (ATSUStyle) font.MacGetATSUStyle() , &m_macATSUIStyle );
 925
 926     wxASSERT_MSG( status == noErr, wxT("couldn't create ATSU style") );
 927
 928     // we need the scale here ...
 929
 930     Fixed atsuSize = IntToFixed( int( 1 * font.GetPointSize()) );
 931     RGBColor atsuColor ;
 932     col.GetRGBColor( &atsuColor );
 933     ATSUAttributeTag atsuTags[] =
 934     {
 935             kATSUSizeTag ,
 936             kATSUColorTag ,
 937     };
 938     ByteCount atsuSizes[WXSIZEOF(atsuTags)] =
 939     {
 940             sizeof( Fixed ) ,
 941             sizeof( RGBColor ) ,
 942     };
 943     ATSUAttributeValuePtr atsuValues[WXSIZEOF(atsuTags)] =
 944     {
 945             &atsuSize ,
 946             &atsuColor ,
 947     };
 948
 949     status = ::ATSUSetAttributes(
 950         m_macATSUIStyle, WXSIZEOF(atsuTags),
 951         atsuTags, atsuSizes, atsuValues);
 952
 953     wxASSERT_MSG( status == noErr , wxT("couldn't modify ATSU style") );
 954 #endif
 955 }
 956
 957 wxMacCoreGraphicsFontData::~wxMacCoreGraphicsFontData()
 958 {
 959 #if wxOSX_USE_CORE_TEXT
 960 #endif
 961 #if wxOSX_USE_ATSU_TEXT
 962     if ( m_macATSUIStyle )
 963     {
 964         ::ATSUDisposeStyle((ATSUStyle)m_macATSUIStyle);
 965         m_macATSUIStyle = NULL;
 966     }
 967 #endif
 968 #if wxOSX_USE_IPHONE
 969     wxMacCocoaRelease( m_uiFont );
 970 #endif
 971 }
 972
 973 class wxMacCoreGraphicsBitmapData : public wxGraphicsObjectRefData
 974 {
 975 public:
 976     wxMacCoreGraphicsBitmapData( wxGraphicsRenderer* renderer, CGImageRef bitmap, bool monochrome );
 977     ~wxMacCoreGraphicsBitmapData();
 978
 979     virtual CGImageRef GetBitmap() { return m_bitmap; }
 980     bool IsMonochrome() { return m_monochrome; }
 981 private :
 982     CGImageRef m_bitmap;
 983     bool m_monochrome;
 984 };
 985
 986 wxMacCoreGraphicsBitmapData::wxMacCoreGraphicsBitmapData( wxGraphicsRenderer* renderer, CGImageRef bitmap, bool monochrome ) : wxGraphicsObjectRefData( renderer ),
 987     m_bitmap(bitmap), m_monochrome(monochrome)
 988 {
 989 }
 990
 991 wxMacCoreGraphicsBitmapData::~wxMacCoreGraphicsBitmapData()
 992 {
 993     CGImageRelease( m_bitmap );
 994 }
 995
 996 //
 997 // Graphics Matrix
 998 //
 999
1000 //-----------------------------------------------------------------------------
1001 // wxMacCoreGraphicsMatrix declaration
1002 //-----------------------------------------------------------------------------
1003
1004 class WXDLLIMPEXP_CORE wxMacCoreGraphicsMatrixData : public wxGraphicsMatrixData
1005 {
1006 public :
1007     wxMacCoreGraphicsMatrixData(wxGraphicsRenderer* renderer) ;
1008
1009     virtual ~wxMacCoreGraphicsMatrixData() ;
1010
1011     virtual wxGraphicsObjectRefData *Clone() const ;
1012
1013     // concatenates the matrix
1014     virtual void Concat( const wxGraphicsMatrixData *t );
1015
1016     // sets the matrix to the respective values
1017     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
1018         wxDouble tx=0.0, wxDouble ty=0.0);
1019
1020     // gets the component valuess of the matrix
1021     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
1022                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
1023
1024     // makes this the inverse matrix
1025     virtual void Invert();
1026
1027     // returns true if the elements of the transformation matrix are equal ?
1028     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
1029
1030     // return true if this is the identity matrix
1031     virtual bool IsIdentity() const;
1032
1033     //
1034     // transformation
1035     //
1036
1037     // add the translation to this matrix
1038     virtual void Translate( wxDouble dx , wxDouble dy );
1039
1040     // add the scale to this matrix
1041     virtual void Scale( wxDouble xScale , wxDouble yScale );
1042
1043     // add the rotation to this matrix (radians)
1044     virtual void Rotate( wxDouble angle );
1045
1046     //
1047     // apply the transforms
1048     //
1049
1050     // applies that matrix to the point
1051     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
1052
1053     // applies the matrix except for translations
1054     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
1055
1056     // returns the native representation
1057     virtual void * GetNativeMatrix() const;
1058
1059 private :
1060     CGAffineTransform m_matrix;
1061 } ;
1062
1063 //-----------------------------------------------------------------------------
1064 // wxMacCoreGraphicsMatrix implementation
1065 //-----------------------------------------------------------------------------
1066
1067 wxMacCoreGraphicsMatrixData::wxMacCoreGraphicsMatrixData(wxGraphicsRenderer* renderer) : wxGraphicsMatrixData(renderer)
1068 {
1069 }
1070
1071 wxMacCoreGraphicsMatrixData::~wxMacCoreGraphicsMatrixData()
1072 {
1073 }
1074
1075 wxGraphicsObjectRefData *wxMacCoreGraphicsMatrixData::Clone() const
1076 {
1077     wxMacCoreGraphicsMatrixData* m = new wxMacCoreGraphicsMatrixData(GetRenderer()) ;
1078     m->m_matrix = m_matrix ;
1079     return m;
1080 }
1081
1082 // concatenates the matrix
1083 void wxMacCoreGraphicsMatrixData::Concat( const wxGraphicsMatrixData *t )
1084 {
1085     m_matrix = CGAffineTransformConcat(*((CGAffineTransform*) t->GetNativeMatrix()), m_matrix );
1086 }
1087
1088 // sets the matrix to the respective values
1089 void wxMacCoreGraphicsMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1090     wxDouble tx, wxDouble ty)
1091 {
1092     m_matrix = CGAffineTransformMake((CGFloat) a,(CGFloat) b,(CGFloat) c,(CGFloat) d,(CGFloat) tx,(CGFloat) ty);
1093 }
1094
1095 // gets the component valuess of the matrix
1096 void wxMacCoreGraphicsMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
1097                                       wxDouble* d, wxDouble* tx, wxDouble* ty) const
1098 {
1099     if (a)  *a = m_matrix.a;
1100     if (b)  *b = m_matrix.b;
1101     if (c)  *c = m_matrix.c;
1102     if (d)  *d = m_matrix.d;
1103     if (tx) *tx= m_matrix.tx;
1104     if (ty) *ty= m_matrix.ty;
1105 }
1106
1107 // makes this the inverse matrix
1108 void wxMacCoreGraphicsMatrixData::Invert()
1109 {
1110     m_matrix = CGAffineTransformInvert( m_matrix );
1111 }
1112
1113 // returns true if the elements of the transformation matrix are equal ?
1114 bool wxMacCoreGraphicsMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
1115 {
1116     return CGAffineTransformEqualToTransform(m_matrix, *((CGAffineTransform*) t->GetNativeMatrix()));
1117 }
1118
1119 // return true if this is the identity matrix
1120 bool wxMacCoreGraphicsMatrixData::IsIdentity() const
1121 {
1122     return ( m_matrix.a == 1 && m_matrix.d == 1 &&
1123         m_matrix.b == 0 && m_matrix.d == 0 && m_matrix.tx == 0 && m_matrix.ty == 0);
1124 }
1125
1126 //
1127 // transformation
1128 //
1129
1130 // add the translation to this matrix
1131 void wxMacCoreGraphicsMatrixData::Translate( wxDouble dx , wxDouble dy )
1132 {
1133     m_matrix = CGAffineTransformTranslate( m_matrix, (CGFloat) dx, (CGFloat) dy);
1134 }
1135
1136 // add the scale to this matrix
1137 void wxMacCoreGraphicsMatrixData::Scale( wxDouble xScale , wxDouble yScale )
1138 {
1139     m_matrix = CGAffineTransformScale( m_matrix, (CGFloat) xScale, (CGFloat) yScale);
1140 }
1141
1142 // add the rotation to this matrix (radians)
1143 void wxMacCoreGraphicsMatrixData::Rotate( wxDouble angle )
1144 {
1145     m_matrix = CGAffineTransformRotate( m_matrix, (CGFloat) angle);
1146 }
1147
1148 //
1149 // apply the transforms
1150 //
1151
1152 // applies that matrix to the point
1153 void wxMacCoreGraphicsMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
1154 {
1155     CGPoint pt = CGPointApplyAffineTransform( CGPointMake((CGFloat) *x,(CGFloat) *y), m_matrix);
1156
1157     *x = pt.x;
1158     *y = pt.y;
1159 }
1160
1161 // applies the matrix except for translations
1162 void wxMacCoreGraphicsMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1163 {
1164     CGSize sz = CGSizeApplyAffineTransform( CGSizeMake((CGFloat) *dx,(CGFloat) *dy) , m_matrix );
1165     *dx = sz.width;
1166     *dy = sz.height;
1167 }
1168
1169 // returns the native representation
1170 void * wxMacCoreGraphicsMatrixData::GetNativeMatrix() const
1171 {
1172     return (void*) &m_matrix;
1173 }
1174
1175 //
1176 // Graphics Path
1177 //
1178
1179 //-----------------------------------------------------------------------------
1180 // wxMacCoreGraphicsPath declaration
1181 //-----------------------------------------------------------------------------
1182
1183 class WXDLLEXPORT wxMacCoreGraphicsPathData : public wxGraphicsPathData
1184 {
1185 public :
1186     wxMacCoreGraphicsPathData( wxGraphicsRenderer* renderer, CGMutablePathRef path = NULL);
1187
1188     ~wxMacCoreGraphicsPathData();
1189
1190     virtual wxGraphicsObjectRefData *Clone() const;
1191
1192     // begins a new subpath at (x,y)
1193     virtual void MoveToPoint( wxDouble x, wxDouble y );
1194
1195     // adds a straight line from the current point to (x,y)
1196     virtual void AddLineToPoint( wxDouble x, wxDouble y );
1197
1198     // adds a cubic Bezier curve from the current point, using two control points and an end point
1199     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
1200
1201     // closes the current sub-path
1202     virtual void CloseSubpath();
1203
1204     // gets the last point of the current path, (0,0) if not yet set
1205     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
1206
1207     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
1208     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise );
1209
1210     //
1211     // These are convenience functions which - if not available natively will be assembled
1212     // using the primitives from above
1213     //
1214
1215     // adds a quadratic Bezier curve from the current point, using a control point and an end point
1216     virtual void AddQuadCurveToPoint( wxDouble cx, wxDouble cy, wxDouble x, wxDouble y );
1217
1218     // appends a rectangle as a new closed subpath
1219     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
1220
1221     // appends a circle as a new closed subpath
1222     virtual void AddCircle( wxDouble x, wxDouble y, wxDouble r );
1223
1224     // appends an ellipsis as a new closed subpath fitting the passed rectangle
1225     virtual void AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
1226
1227     // 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)
1228     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r );
1229
1230     // adds another path
1231     virtual void AddPath( const wxGraphicsPathData* path );
1232
1233     // returns the native path
1234     virtual void * GetNativePath() const { return m_path; }
1235
1236     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
1237     virtual void UnGetNativePath(void *WXUNUSED(p)) const {}
1238
1239     // transforms each point of this path by the matrix
1240     virtual void Transform( const wxGraphicsMatrixData* matrix );
1241
1242     // gets the bounding box enclosing all points (possibly including control points)
1243     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
1244
1245     virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxODDEVEN_RULE) const;
1246 private :
1247     CGMutablePathRef m_path;
1248 };
1249
1250 //-----------------------------------------------------------------------------
1251 // wxMacCoreGraphicsPath implementation
1252 //-----------------------------------------------------------------------------
1253
1254 wxMacCoreGraphicsPathData::wxMacCoreGraphicsPathData( wxGraphicsRenderer* renderer, CGMutablePathRef path) : wxGraphicsPathData(renderer)
1255 {
1256     if ( path )
1257         m_path = path;
1258     else
1259         m_path = CGPathCreateMutable();
1260 }
1261
1262 wxMacCoreGraphicsPathData::~wxMacCoreGraphicsPathData()
1263 {
1264     CGPathRelease( m_path );
1265 }
1266
1267 wxGraphicsObjectRefData* wxMacCoreGraphicsPathData::Clone() const
1268 {
1269     wxMacCoreGraphicsPathData* clone = new wxMacCoreGraphicsPathData(GetRenderer(),CGPathCreateMutableCopy(m_path));
1270     return clone ;
1271 }
1272
1273
1274 // opens (starts) a new subpath
1275 void wxMacCoreGraphicsPathData::MoveToPoint( wxDouble x1 , wxDouble y1 )
1276 {
1277     CGPathMoveToPoint( m_path , NULL , (CGFloat) x1 , (CGFloat) y1 );
1278 }
1279
1280 void wxMacCoreGraphicsPathData::AddLineToPoint( wxDouble x1 , wxDouble y1 )
1281 {
1282     CGPathAddLineToPoint( m_path , NULL , (CGFloat) x1 , (CGFloat) y1 );
1283 }
1284
1285 void wxMacCoreGraphicsPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
1286 {
1287     CGPathAddCurveToPoint( m_path , NULL , (CGFloat) cx1 , (CGFloat) cy1 , (CGFloat) cx2, (CGFloat) cy2, (CGFloat) x , (CGFloat) y );
1288 }
1289
1290 void wxMacCoreGraphicsPathData::AddQuadCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble x, wxDouble y )
1291 {
1292     CGPathAddQuadCurveToPoint( m_path , NULL , (CGFloat) cx1 , (CGFloat) cy1 , (CGFloat) x , (CGFloat) y );
1293 }
1294
1295 void wxMacCoreGraphicsPathData::AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1296 {
1297     CGRect cgRect = { { (CGFloat) x , (CGFloat) y } , { (CGFloat) w , (CGFloat) h } };
1298     CGPathAddRect( m_path , NULL , cgRect );
1299 }
1300
1301 void wxMacCoreGraphicsPathData::AddCircle( wxDouble x, wxDouble y , wxDouble r )
1302 {
1303     CGPathAddEllipseInRect( m_path, NULL, CGRectMake(x-r,y-r,2*r,2*r));
1304 }
1305
1306 void wxMacCoreGraphicsPathData::AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1307 {
1308     CGPathAddEllipseInRect( m_path, NULL, CGRectMake(x,y,w,h));
1309 }
1310
1311 // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
1312 void wxMacCoreGraphicsPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise )
1313 {
1314     // inverse direction as we the 'normal' state is a y axis pointing down, ie mirrored to the standard core graphics setup
1315     CGPathAddArc( m_path, NULL , (CGFloat) x, (CGFloat) y, (CGFloat) r, (CGFloat) startAngle, (CGFloat) endAngle, !clockwise);
1316 }
1317
1318 void wxMacCoreGraphicsPathData::AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )
1319 {
1320     CGPathAddArcToPoint( m_path, NULL , (CGFloat) x1, (CGFloat) y1, (CGFloat) x2, (CGFloat) y2, (CGFloat) r);
1321 }
1322
1323 void wxMacCoreGraphicsPathData::AddPath( const wxGraphicsPathData* path )
1324 {
1325     CGPathAddPath( m_path , NULL, (CGPathRef) path->GetNativePath() );
1326 }
1327
1328 // closes the current subpath
1329 void wxMacCoreGraphicsPathData::CloseSubpath()
1330 {
1331     CGPathCloseSubpath( m_path );
1332 }
1333
1334 // gets the last point of the current path, (0,0) if not yet set
1335 void wxMacCoreGraphicsPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
1336 {
1337     CGPoint p = CGPathGetCurrentPoint( m_path );
1338     *x = p.x;
1339     *y = p.y;
1340 }
1341
1342 // transforms each point of this path by the matrix
1343 void wxMacCoreGraphicsPathData::Transform( const wxGraphicsMatrixData* matrix )
1344 {
1345     CGMutablePathRef p = CGPathCreateMutable() ;
1346     CGPathAddPath( p, (CGAffineTransform*) matrix->GetNativeMatrix() , m_path );
1347     CGPathRelease( m_path );
1348     m_path = p;
1349 }
1350
1351 // gets the bounding box enclosing all points (possibly including control points)
1352 void wxMacCoreGraphicsPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
1353 {
1354     CGRect bounds = CGPathGetBoundingBox( m_path ) ;
1355     *x = bounds.origin.x;
1356     *y = bounds.origin.y;
1357     *w = bounds.size.width;
1358     *h = bounds.size.height;
1359 }
1360
1361 bool wxMacCoreGraphicsPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle) const
1362 {
1363     return CGPathContainsPoint( m_path, NULL, CGPointMake((CGFloat) x,(CGFloat) y), fillStyle == wxODDEVEN_RULE );
1364 }
1365
1366 //
1367 // Graphics Context
1368 //
1369
1370 //-----------------------------------------------------------------------------
1371 // wxMacCoreGraphicsContext declaration
1372 //-----------------------------------------------------------------------------
1373
1374 class WXDLLEXPORT wxMacCoreGraphicsContext : public wxGraphicsContext
1375 {
1376 public:
1377     wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, CGContextRef cgcontext, wxDouble width = 0, wxDouble height = 0 );
1378
1379 #if wxOSX_USE_CARBON
1380     wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, WindowRef window );
1381 #endif
1382
1383     wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, wxWindow* window );
1384
1385     wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer);
1386
1387     wxMacCoreGraphicsContext();
1388
1389     ~wxMacCoreGraphicsContext();
1390
1391     void Init();
1392
1393     virtual void StartPage( wxDouble width, wxDouble height );
1394
1395     virtual void EndPage();
1396
1397     virtual void Flush();
1398
1399     // push the current state of the context, ie the transformation matrix on a stack
1400     virtual void PushState();
1401
1402     // pops a stored state from the stack
1403     virtual void PopState();
1404
1405     // clips drawings to the region
1406     virtual void Clip( const wxRegion &region );
1407
1408     // clips drawings to the rect
1409     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
1410
1411     // resets the clipping to original extent
1412     virtual void ResetClip();
1413
1414     virtual void * GetNativeContext();
1415
1416     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
1417
1418     virtual bool SetCompositionMode(wxCompositionMode op);
1419
1420     virtual void BeginLayer(wxDouble opacity);
1421
1422     virtual void EndLayer();
1423
1424     //
1425     // transformation
1426     //
1427
1428     // translate
1429     virtual void Translate( wxDouble dx , wxDouble dy );
1430
1431     // scale
1432     virtual void Scale( wxDouble xScale , wxDouble yScale );
1433
1434     // rotate (radians)
1435     virtual void Rotate( wxDouble angle );
1436
1437     // concatenates this transform with the current transform of this context
1438     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
1439
1440     // sets the transform of this context
1441     virtual void SetTransform( const wxGraphicsMatrix& matrix );
1442
1443     // gets the matrix of this context
1444     virtual wxGraphicsMatrix GetTransform() const;
1445     //
1446     // setting the paint
1447     //
1448
1449     // strokes along a path with the current pen
1450     virtual void StrokePath( const wxGraphicsPath &path );
1451
1452     // fills a path with the current brush
1453     virtual void FillPath( const wxGraphicsPath &path, wxPolygonFillMode fillStyle = wxODDEVEN_RULE );
1454
1455     // draws a path by first filling and then stroking
1456     virtual void DrawPath( const wxGraphicsPath &path, wxPolygonFillMode fillStyle = wxODDEVEN_RULE );
1457
1458     virtual bool ShouldOffset() const
1459     {
1460         if ( !m_enableOffset )
1461             return false;
1462
1463         int penwidth = 0 ;
1464         if ( !m_pen.IsNull() )
1465         {
1466             penwidth = (int)((wxMacCoreGraphicsPenData*)m_pen.GetRefData())->GetWidth();
1467             if ( penwidth == 0 )
1468                 penwidth = 1;
1469         }
1470         return ( penwidth % 2 ) == 1;
1471     }
1472     //
1473     // text
1474     //
1475
1476     virtual void GetTextExtent( const wxString &text, wxDouble *width, wxDouble *height,
1477         wxDouble *descent, wxDouble *externalLeading ) const;
1478
1479     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
1480
1481     //
1482     // image support
1483     //
1484
1485     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
1486
1487     virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
1488
1489     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
1490
1491     void SetNativeContext( CGContextRef cg );
1492
1493     DECLARE_DYNAMIC_CLASS_NO_COPY(wxMacCoreGraphicsContext)
1494
1495 private:
1496     bool EnsureIsValid();
1497
1498     virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
1499     virtual void DoDrawRotatedText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle );
1500
1501     CGContextRef m_cgContext;
1502 #if wxOSX_USE_CARBON
1503     WindowRef m_windowRef;
1504 #else
1505     WXWidget m_view;
1506 #endif
1507     bool m_contextSynthesized;
1508     CGAffineTransform m_windowTransform;
1509     bool m_invisible;
1510
1511 #if wxOSX_USE_COCOA_OR_CARBON
1512     wxCFRef<HIShapeRef> m_clipRgn;
1513 #endif
1514 };
1515
1516 //-----------------------------------------------------------------------------
1517 // device context implementation
1518 //
1519 // more and more of the dc functionality should be implemented by calling
1520 // the appropricate wxMacCoreGraphicsContext, but we will have to do that step by step
1521 // also coordinate conversions should be moved to native matrix ops
1522 //-----------------------------------------------------------------------------
1523
1524 // we always stock two context states, one at entry, to be able to preserve the
1525 // state we were called with, the other one after changing to HI Graphics orientation
1526 // (this one is used for getting back clippings etc)
1527
1528 //-----------------------------------------------------------------------------
1529 // wxMacCoreGraphicsContext implementation
1530 //-----------------------------------------------------------------------------
1531
1532 IMPLEMENT_DYNAMIC_CLASS(wxMacCoreGraphicsContext, wxGraphicsContext)
1533
1534 class wxQuartzOffsetHelper
1535 {
1536 public :
1537     wxQuartzOffsetHelper( CGContextRef cg , bool offset )
1538     {
1539         m_cg = cg;
1540         m_offset = offset;
1541         if ( m_offset )
1542         {
1543             m_userOffset = CGContextConvertSizeToUserSpace( m_cg, CGSizeMake( 0.5 , 0.5 ) );
1544             CGContextTranslateCTM( m_cg, m_userOffset.width , m_userOffset.height );
1545         }
1546         else
1547         {
1548             m_userOffset = CGSizeMake(0.0, 0.0);
1549         }
1550
1551     }
1552     ~wxQuartzOffsetHelper( )
1553     {
1554         if ( m_offset )
1555             CGContextTranslateCTM( m_cg, -m_userOffset.width , -m_userOffset.height );
1556     }
1557 public :
1558     CGSize m_userOffset;
1559     CGContextRef m_cg;
1560     bool m_offset;
1561 } ;
1562
1563 void wxMacCoreGraphicsContext::Init()
1564 {
1565     m_cgContext = NULL;
1566     m_contextSynthesized = false;
1567     m_width = 0;
1568     m_height = 0;
1569 #if wxOSX_USE_CARBON
1570     m_windowRef = NULL;
1571 #endif
1572 #if wxOSX_USE_COCOA_OR_IPHONE
1573     m_view = NULL;
1574 #endif
1575     m_invisible = false;
1576 }
1577
1578 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, CGContextRef cgcontext, wxDouble width, wxDouble height ) : wxGraphicsContext(renderer)
1579 {
1580     Init();
1581     SetNativeContext(cgcontext);
1582     m_width = width;
1583     m_height = height;
1584 }
1585
1586 #if wxOSX_USE_CARBON
1587 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, WindowRef window ): wxGraphicsContext(renderer)
1588 {
1589     Init();
1590     m_windowRef = window;
1591     m_enableOffset = true;
1592 }
1593 #endif
1594
1595 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, wxWindow* window ): wxGraphicsContext(renderer)
1596 {
1597     Init();
1598
1599     m_enableOffset = true;
1600     wxSize sz = window->GetSize();
1601     m_width = sz.x;
1602     m_height = sz.y;
1603
1604 #if wxOSX_USE_COCOA_OR_IPHONE
1605     m_view = window->GetHandle();
1606
1607 #if wxOSX_USE_COCOA
1608     if ( ! window->GetPeer()->IsFlipped() )
1609     {
1610         m_windowTransform = CGAffineTransformMakeTranslation( 0 , m_height );
1611         m_windowTransform = CGAffineTransformScale( m_windowTransform , 1 , -1 );
1612     }
1613     else
1614 #endif
1615     {
1616         m_windowTransform = CGAffineTransformIdentity;
1617     }
1618 #else
1619     int originX , originY;
1620     originX = originY = 0;
1621     Rect bounds = { 0,0,0,0 };
1622     m_windowRef = (WindowRef) window->MacGetTopLevelWindowRef();
1623     window->MacWindowToRootWindow( &originX , &originY );
1624     GetWindowBounds( m_windowRef, kWindowContentRgn, &bounds );
1625     m_windowTransform = CGAffineTransformMakeTranslation( 0 , bounds.bottom - bounds.top );
1626     m_windowTransform = CGAffineTransformScale( m_windowTransform , 1 , -1 );
1627     m_windowTransform = CGAffineTransformTranslate( m_windowTransform, originX, originY ) ;
1628 #endif
1629 }
1630
1631 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext(wxGraphicsRenderer* renderer) : wxGraphicsContext(renderer)
1632 {
1633     Init();
1634 }
1635
1636 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext() : wxGraphicsContext(NULL)
1637 {
1638     Init();
1639     wxLogDebug(wxT("Illegal Constructor called"));
1640 }
1641
1642 wxMacCoreGraphicsContext::~wxMacCoreGraphicsContext()
1643 {
1644     SetNativeContext(NULL);
1645 }
1646
1647
1648 void wxMacCoreGraphicsContext::StartPage( wxDouble width, wxDouble height )
1649 {
1650     CGRect r;
1651     if ( width != 0 && height != 0)
1652         r = CGRectMake( (CGFloat) 0.0 , (CGFloat) 0.0 , (CGFloat) width  , (CGFloat) height );
1653     else
1654         r = CGRectMake( (CGFloat) 0.0 , (CGFloat) 0.0 , (CGFloat) m_width  , (CGFloat) m_height );
1655
1656     CGContextBeginPage(m_cgContext,  &r );
1657 //    CGContextTranslateCTM( m_cgContext , 0 ,  height == 0 ? m_height : height );
1658 //    CGContextScaleCTM( m_cgContext , 1 , -1 );
1659 }
1660
1661 void wxMacCoreGraphicsContext::EndPage()
1662 {
1663     CGContextEndPage(m_cgContext);
1664 }
1665
1666 void wxMacCoreGraphicsContext::Flush()
1667 {
1668     CGContextFlush(m_cgContext);
1669 }
1670
1671 bool wxMacCoreGraphicsContext::EnsureIsValid()
1672 {
1673     if ( !m_cgContext )
1674     {
1675         if (m_invisible)
1676             return false;
1677
1678 #if wxOSX_USE_COCOA
1679         if ( wxOSXLockFocus(m_view) )
1680         {
1681             m_cgContext = wxOSXGetContextFromCurrentContext();
1682             wxASSERT_MSG( m_cgContext != NULL, wxT("Unable to retrieve drawing context from View"));
1683         }
1684         else
1685         {
1686             m_invisible = true;
1687         }
1688 #endif
1689 #if wxOSX_USE_IPHONE
1690         m_cgContext = wxOSXGetContextFromCurrentContext();
1691         if ( m_cgContext == NULL )
1692         {
1693             m_invisible = true;
1694         }
1695 #endif
1696 #if wxOSX_USE_CARBON
1697         OSStatus status = QDBeginCGContext( GetWindowPort( m_windowRef ) , &m_cgContext );
1698         if ( status != noErr )
1699         {
1700             wxFAIL_MSG("Cannot nest wxDCs on the same window");
1701         }
1702 #endif
1703         if ( m_cgContext )
1704         {
1705             CGContextSaveGState( m_cgContext );
1706 #if wxOSX_USE_COCOA_OR_CARBON
1707             if ( m_clipRgn.get() )
1708             {
1709                 wxCFRef<HIMutableShapeRef> hishape( HIShapeCreateMutableCopy( m_clipRgn ) );
1710                 // if the shape is empty, HIShapeReplacePathInCGContext doesn't work
1711                 if ( HIShapeIsEmpty(hishape))
1712                 {
1713                     CGRect empty = CGRectMake( 0,0,0,0 );
1714                     CGContextClipToRect( m_cgContext, empty );
1715                 }
1716                 else
1717                 {
1718                     HIShapeReplacePathInCGContext( hishape, m_cgContext );
1719                     CGContextClip( m_cgContext );
1720                 }
1721             }
1722 #endif
1723             CGContextConcatCTM( m_cgContext, m_windowTransform );
1724             CGContextSetTextMatrix( m_cgContext, CGAffineTransformIdentity );
1725             m_contextSynthesized = true;
1726             CGContextSaveGState( m_cgContext );
1727
1728 #if 0 // turn on for debugging of clientdc
1729             static float color = 0.5 ;
1730             static int channel = 0 ;
1731             CGRect bounds = CGRectMake(-1000,-1000,2000,2000);
1732             CGContextSetRGBFillColor( m_cgContext, channel == 0 ? color : 0.5 ,
1733                 channel == 1 ? color : 0.5 , channel == 2 ? color : 0.5 , 1 );
1734             CGContextFillRect( m_cgContext, bounds );
1735             color += 0.1 ;
1736             if ( color > 0.9 )
1737             {
1738                 color = 0.5 ;
1739                 channel++ ;
1740                 if ( channel == 3 )
1741                     channel = 0 ;
1742             }
1743 #endif
1744         }
1745     }
1746     return m_cgContext != NULL;
1747 }
1748
1749 bool wxMacCoreGraphicsContext::SetAntialiasMode(wxAntialiasMode antialias)
1750 {
1751     if (!EnsureIsValid())
1752         return true;
1753
1754     if (m_antialias == antialias)
1755         return true;
1756
1757     m_antialias = antialias;
1758
1759     bool antialiasMode;
1760     switch (antialias)
1761     {
1762         case wxANTIALIAS_DEFAULT:
1763             antialiasMode = true;
1764             break;
1765         case wxANTIALIAS_NONE:
1766             antialiasMode = false;
1767             break;
1768         default:
1769             return false;
1770     }
1771     CGContextSetShouldAntialias(m_cgContext, antialiasMode);
1772     return true;
1773 }
1774
1775 bool wxMacCoreGraphicsContext::SetCompositionMode(wxCompositionMode op)
1776 {
1777     if (!EnsureIsValid())
1778         return true;
1779
1780     if ( m_composition == op )
1781         return true;
1782
1783     m_composition = op;
1784
1785     if (m_composition == wxCOMPOSITION_DEST)
1786         return true;
1787
1788 #if wxOSX_USE_COCOA_OR_CARBON
1789     if ( UMAGetSystemVersion() < 0x1060 )
1790     {
1791         CGCompositeOperation cop = kCGCompositeOperationSourceOver;
1792         CGBlendMode mode = kCGBlendModeNormal;
1793         switch( op )
1794         {
1795         case wxCOMPOSITION_CLEAR:
1796             cop = kCGCompositeOperationClear;
1797             break;
1798         case wxCOMPOSITION_SOURCE:
1799             cop = kCGCompositeOperationCopy;
1800             break;
1801         case wxCOMPOSITION_OVER:
1802             mode = kCGBlendModeNormal;
1803             break;
1804         case wxCOMPOSITION_IN:
1805             cop = kCGCompositeOperationSourceIn;
1806             break;
1807         case wxCOMPOSITION_OUT:
1808             cop = kCGCompositeOperationSourceOut;
1809             break;
1810         case wxCOMPOSITION_ATOP:
1811             cop = kCGCompositeOperationSourceAtop;
1812             break;
1813         case wxCOMPOSITION_DEST_OVER:
1814             cop = kCGCompositeOperationDestinationOver;
1815             break;
1816         case wxCOMPOSITION_DEST_IN:
1817             cop = kCGCompositeOperationDestinationIn;
1818             break;
1819         case wxCOMPOSITION_DEST_OUT:
1820             cop = kCGCompositeOperationDestinationOut;
1821             break;
1822         case wxCOMPOSITION_DEST_ATOP:
1823            cop = kCGCompositeOperationDestinationAtop;
1824             break;
1825         case wxCOMPOSITION_XOR:
1826             cop = kCGCompositeOperationXOR;
1827             break;
1828 #if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5
1829         case wxCOMPOSITION_ADD:
1830             mode = kCGBlendModePlusLighter ;
1831             break;
1832 #endif
1833         default:
1834             return false;
1835         }
1836         if ( cop != kCGCompositeOperationSourceOver )
1837             CGContextSetCompositeOperation(m_cgContext, cop);
1838         else
1839             CGContextSetBlendMode(m_cgContext, mode);
1840     }
1841 #endif
1842 #if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5
1843     else
1844     {
1845         CGBlendMode mode = kCGBlendModeNormal;
1846         switch( op )
1847         {
1848         case wxCOMPOSITION_CLEAR:
1849             mode = kCGBlendModeClear;
1850             break;
1851         case wxCOMPOSITION_SOURCE:
1852             mode = kCGBlendModeCopy;
1853             break;
1854         case wxCOMPOSITION_OVER:
1855             mode = kCGBlendModeNormal;
1856             break;
1857         case wxCOMPOSITION_IN:
1858             mode = kCGBlendModeSourceIn;
1859             break;
1860         case wxCOMPOSITION_OUT:
1861             mode = kCGBlendModeSourceOut;
1862             break;
1863         case wxCOMPOSITION_ATOP:
1864             mode = kCGBlendModeSourceAtop;
1865             break;
1866         case wxCOMPOSITION_DEST_OVER:
1867             mode = kCGBlendModeDestinationOver;
1868             break;
1869         case wxCOMPOSITION_DEST_IN:
1870             mode = kCGBlendModeDestinationIn;
1871             break;
1872         case wxCOMPOSITION_DEST_OUT:
1873             mode = kCGBlendModeDestinationOut;
1874             break;
1875         case wxCOMPOSITION_DEST_ATOP:
1876            mode = kCGBlendModeDestinationAtop;
1877             break;
1878         case wxCOMPOSITION_XOR:
1879             mode = kCGBlendModeXOR;
1880             break;
1881
1882         case wxCOMPOSITION_ADD:
1883             mode = kCGBlendModePlusLighter ;
1884             break;
1885         default:
1886             return false;
1887         }
1888         CGContextSetBlendMode(m_cgContext, mode);
1889     }
1890 #endif
1891     return true;
1892 }
1893
1894 void wxMacCoreGraphicsContext::BeginLayer(wxDouble opacity)
1895 {
1896     CGContextSaveGState(m_cgContext);
1897     CGContextSetAlpha(m_cgContext, (CGFloat) opacity);
1898     CGContextBeginTransparencyLayer(m_cgContext, 0);
1899 }
1900
1901 void wxMacCoreGraphicsContext::EndLayer()
1902 {
1903     CGContextEndTransparencyLayer(m_cgContext);
1904     CGContextRestoreGState(m_cgContext);
1905 }
1906
1907 void wxMacCoreGraphicsContext::Clip( const wxRegion &region )
1908 {
1909 #if wxOSX_USE_COCOA_OR_CARBON
1910     if( m_cgContext )
1911     {
1912         wxCFRef<HIShapeRef> shape = wxCFRefFromGet(region.GetWXHRGN());
1913         // if the shape is empty, HIShapeReplacePathInCGContext doesn't work
1914         if ( HIShapeIsEmpty(shape))
1915         {
1916             CGRect empty = CGRectMake( 0,0,0,0 );
1917             CGContextClipToRect( m_cgContext, empty );
1918         }
1919         else
1920         {
1921             HIShapeReplacePathInCGContext( shape, m_cgContext );
1922             CGContextClip( m_cgContext );
1923         }
1924     }
1925     else
1926     {
1927         // this offsetting to device coords is not really correct, but since we cannot apply affine transforms
1928         // to regions we try at least to have correct translations
1929         HIMutableShapeRef mutableShape = HIShapeCreateMutableCopy( region.GetWXHRGN() );
1930
1931         CGPoint transformedOrigin = CGPointApplyAffineTransform( CGPointZero, m_windowTransform );
1932         HIShapeOffset( mutableShape, transformedOrigin.x, transformedOrigin.y );
1933         m_clipRgn.reset(mutableShape);
1934     }
1935 #else
1936     // allow usage as measuring context
1937     // wxASSERT_MSG( m_cgContext != NULL, "Needs a valid context for clipping" );
1938 #endif
1939 }
1940
1941 // clips drawings to the rect
1942 void wxMacCoreGraphicsContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1943 {
1944     CGRect r = CGRectMake( (CGFloat) x , (CGFloat) y , (CGFloat) w , (CGFloat) h );
1945     if ( m_cgContext )
1946     {
1947         CGContextClipToRect( m_cgContext, r );
1948     }
1949     else
1950     {
1951 #if wxOSX_USE_COCOA_OR_CARBON
1952         // the clipping itself must be stored as device coordinates, otherwise
1953         // we cannot apply it back correctly
1954         r.origin= CGPointApplyAffineTransform( r.origin, m_windowTransform );
1955         r.size= CGSizeApplyAffineTransform(r.size, m_windowTransform);
1956         m_clipRgn.reset(HIShapeCreateWithRect(&r));
1957 #else
1958     // allow usage as measuring context
1959     // wxFAIL_MSG( "Needs a valid context for clipping" );
1960 #endif
1961     }
1962 }
1963
1964     // resets the clipping to original extent
1965 void wxMacCoreGraphicsContext::ResetClip()
1966 {
1967     if ( m_cgContext )
1968     {
1969         // there is no way for clearing the clip, we can only revert to the stored
1970         // state, but then we have to make sure everything else is NOT restored
1971         CGAffineTransform transform = CGContextGetCTM( m_cgContext );
1972         CGContextRestoreGState( m_cgContext );
1973         CGContextSaveGState( m_cgContext );
1974         CGAffineTransform transformNew = CGContextGetCTM( m_cgContext );
1975         transformNew = CGAffineTransformInvert( transformNew ) ;
1976         CGContextConcatCTM( m_cgContext, transformNew);
1977         CGContextConcatCTM( m_cgContext, transform);
1978     }
1979     else
1980     {
1981 #if wxOSX_USE_COCOA_OR_CARBON
1982         m_clipRgn.reset();
1983 #else
1984     // allow usage as measuring context
1985     // wxFAIL_MSG( "Needs a valid context for clipping" );
1986 #endif
1987     }
1988 }
1989
1990 void wxMacCoreGraphicsContext::StrokePath( const wxGraphicsPath &path )
1991 {
1992     if ( m_pen.IsNull() )
1993         return ;
1994
1995     if (!EnsureIsValid())
1996         return;
1997
1998     if (m_composition == wxCOMPOSITION_DEST)
1999         return;
2000
2001     wxQuartzOffsetHelper helper( m_cgContext , ShouldOffset() );
2002
2003     ((wxMacCoreGraphicsPenData*)m_pen.GetRefData())->Apply(this);
2004     CGContextAddPath( m_cgContext , (CGPathRef) path.GetNativePath() );
2005     CGContextStrokePath( m_cgContext );
2006 }
2007
2008 void wxMacCoreGraphicsContext::DrawPath( const wxGraphicsPath &path , wxPolygonFillMode fillStyle )
2009 {
2010     if (!EnsureIsValid())
2011         return;
2012
2013     if (m_composition == wxCOMPOSITION_DEST)
2014         return;
2015
2016     if ( !m_brush.IsNull() && ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
2017     {
2018         // when using shading, we cannot draw pen and brush at the same time
2019         // revert to the base implementation of first filling and then stroking
2020         wxGraphicsContext::DrawPath( path, fillStyle );
2021         return;
2022     }
2023
2024     CGPathDrawingMode mode = kCGPathFill ;
2025     if ( m_brush.IsNull() )
2026     {
2027         if ( m_pen.IsNull() )
2028             return;
2029         else
2030             mode = kCGPathStroke;
2031     }
2032     else
2033     {
2034         if ( m_pen.IsNull() )
2035         {
2036             if ( fillStyle == wxODDEVEN_RULE )
2037                 mode = kCGPathEOFill;
2038             else
2039                 mode = kCGPathFill;
2040         }
2041         else
2042         {
2043             if ( fillStyle == wxODDEVEN_RULE )
2044                 mode = kCGPathEOFillStroke;
2045             else
2046                 mode = kCGPathFillStroke;
2047         }
2048     }
2049
2050     if ( !m_brush.IsNull() )
2051         ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->Apply(this);
2052     if ( !m_pen.IsNull() )
2053         ((wxMacCoreGraphicsPenData*)m_pen.GetRefData())->Apply(this);
2054
2055     wxQuartzOffsetHelper helper( m_cgContext , ShouldOffset() );
2056
2057     CGContextAddPath( m_cgContext , (CGPathRef) path.GetNativePath() );
2058     CGContextDrawPath( m_cgContext , mode );
2059 }
2060
2061 void wxMacCoreGraphicsContext::FillPath( const wxGraphicsPath &path , wxPolygonFillMode fillStyle )
2062 {
2063     if ( m_brush.IsNull() )
2064         return;
2065
2066     if (!EnsureIsValid())
2067         return;
2068
2069     if (m_composition == wxCOMPOSITION_DEST)
2070         return;
2071
2072     if ( ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
2073     {
2074         CGContextSaveGState( m_cgContext );
2075         CGContextAddPath( m_cgContext , (CGPathRef) path.GetNativePath() );
2076         CGContextClip( m_cgContext );
2077         CGContextDrawShading( m_cgContext, ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->GetShading() );
2078         CGContextRestoreGState( m_cgContext);
2079     }
2080     else
2081     {
2082         ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->Apply(this);
2083         CGContextAddPath( m_cgContext , (CGPathRef) path.GetNativePath() );
2084         if ( fillStyle == wxODDEVEN_RULE )
2085             CGContextEOFillPath( m_cgContext );
2086         else
2087             CGContextFillPath( m_cgContext );
2088     }
2089 }
2090
2091 void wxMacCoreGraphicsContext::SetNativeContext( CGContextRef cg )
2092 {
2093     // we allow either setting or clearing but not replacing
2094     wxASSERT( m_cgContext == NULL || cg == NULL );
2095
2096     if ( m_cgContext )
2097     {
2098         CGContextRestoreGState( m_cgContext );
2099         CGContextRestoreGState( m_cgContext );
2100         if ( m_contextSynthesized )
2101         {
2102 #if wxOSX_USE_CARBON
2103             QDEndCGContext( GetWindowPort( m_windowRef ) , &m_cgContext);
2104 #endif
2105 #if wxOSX_USE_COCOA
2106             wxOSXUnlockFocus(m_view);
2107 #endif
2108         }
2109         else
2110             CGContextRelease(m_cgContext);
2111     }
2112
2113     m_cgContext = cg;
2114
2115     // FIXME: This check is needed because currently we need to use a DC/GraphicsContext
2116     // in order to get font properties, like wxFont::GetPixelSize, but since we don't have
2117     // a native window attached to use, I create a wxGraphicsContext with a NULL CGContextRef
2118     // for this one operation.
2119
2120     // When wxFont::GetPixelSize on Mac no longer needs a graphics context, this check
2121     // can be removed.
2122     if (m_cgContext)
2123     {
2124         CGContextRetain(m_cgContext);
2125         CGContextSaveGState( m_cgContext );
2126         CGContextSetTextMatrix( m_cgContext, CGAffineTransformIdentity );
2127         CGContextSaveGState( m_cgContext );
2128         m_contextSynthesized = false;
2129     }
2130 }
2131
2132 void wxMacCoreGraphicsContext::Translate( wxDouble dx , wxDouble dy )
2133 {
2134     if ( m_cgContext )
2135         CGContextTranslateCTM( m_cgContext, (CGFloat) dx, (CGFloat) dy );
2136     else
2137         m_windowTransform = CGAffineTransformTranslate(m_windowTransform, (CGFloat) dx, (CGFloat) dy);
2138 }
2139
2140 void wxMacCoreGraphicsContext::Scale( wxDouble xScale , wxDouble yScale )
2141 {
2142     if ( m_cgContext )
2143         CGContextScaleCTM( m_cgContext , (CGFloat) xScale , (CGFloat) yScale );
2144     else
2145         m_windowTransform = CGAffineTransformScale(m_windowTransform, (CGFloat) xScale, (CGFloat) yScale);
2146 }
2147
2148 void wxMacCoreGraphicsContext::Rotate( wxDouble angle )
2149 {
2150     if ( m_cgContext )
2151         CGContextRotateCTM( m_cgContext , (CGFloat) angle );
2152     else
2153         m_windowTransform = CGAffineTransformRotate(m_windowTransform, (CGFloat) angle);
2154 }
2155
2156 void wxMacCoreGraphicsContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
2157 {
2158     wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp);
2159     DrawBitmap(bitmap, x, y, w, h);
2160 }
2161
2162 void wxMacCoreGraphicsContext::DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
2163 {
2164     if (!EnsureIsValid())
2165         return;
2166
2167     if (m_composition == wxCOMPOSITION_DEST)
2168         return;
2169
2170 #ifdef __WXMAC__
2171     wxMacCoreGraphicsBitmapData* refdata  =static_cast<wxMacCoreGraphicsBitmapData*>(bmp.GetRefData());
2172     CGImageRef image = refdata->GetBitmap();
2173     CGRect r = CGRectMake( (CGFloat) x , (CGFloat) y , (CGFloat) w , (CGFloat) h );
2174     if ( refdata->IsMonochrome() == 1 )
2175     {
2176         // is a mask, the '1' in the mask tell where to draw the current brush
2177         if (  !m_brush.IsNull() )
2178         {
2179             if ( ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
2180             {
2181                 // TODO clip to mask
2182             /*
2183                 CGContextSaveGState( m_cgContext );
2184                 CGContextAddPath( m_cgContext , (CGPathRef) path.GetNativePath() );
2185                 CGContextClip( m_cgContext );
2186                 CGContextDrawShading( m_cgContext, ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->GetShading() );
2187                 CGContextRestoreGState( m_cgContext);
2188             */
2189             }
2190             else
2191             {
2192                 ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->Apply(this);
2193                 wxMacDrawCGImage( m_cgContext , &r , image );
2194             }
2195         }
2196     }
2197     else
2198     {
2199         wxMacDrawCGImage( m_cgContext , &r , image );
2200     }
2201 #endif
2202 }
2203
2204 void wxMacCoreGraphicsContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
2205 {
2206     if (!EnsureIsValid())
2207         return;
2208
2209     if (m_composition == wxCOMPOSITION_DEST)
2210         return;
2211
2212     CGRect r = CGRectMake( (CGFloat) 0.0 , (CGFloat) 0.0 , (CGFloat) w , (CGFloat) h );
2213     CGContextSaveGState( m_cgContext );
2214     CGContextTranslateCTM( m_cgContext,(CGFloat) x ,(CGFloat) (y + h) );
2215     CGContextScaleCTM( m_cgContext, 1, -1 );
2216 #if wxOSX_USE_COCOA_OR_CARBON
2217     PlotIconRefInContext( m_cgContext , &r , kAlignNone , kTransformNone ,
2218         NULL , kPlotIconRefNormalFlags , icon.GetHICON() );
2219 #endif
2220     CGContextRestoreGState( m_cgContext );
2221 }
2222
2223 void wxMacCoreGraphicsContext::PushState()
2224 {
2225     if (!EnsureIsValid())
2226         return;
2227
2228     CGContextSaveGState( m_cgContext );
2229 }
2230
2231 void wxMacCoreGraphicsContext::PopState()
2232 {
2233     if (!EnsureIsValid())
2234         return;
2235
2236     CGContextRestoreGState( m_cgContext );
2237 }
2238
2239 void wxMacCoreGraphicsContext::DoDrawText( const wxString &str, wxDouble x, wxDouble y )
2240 {
2241     wxCHECK_RET( !m_font.IsNull(), wxT("wxMacCoreGraphicsContext::DrawText - no valid font set") );
2242
2243     if (!EnsureIsValid())
2244         return;
2245
2246     if (m_composition == wxCOMPOSITION_DEST)
2247         return;
2248
2249 #if wxOSX_USE_CORE_TEXT
2250     if ( UMAGetSystemVersion() >= 0x1050 )
2251     {
2252         wxMacCoreGraphicsFontData* fref = (wxMacCoreGraphicsFontData*)m_font.GetRefData();
2253         wxCFStringRef text(str, wxLocale::GetSystemEncoding() );
2254         CTFontRef font = fref->OSXGetCTFont();
2255         CGColorRef col = wxMacCreateCGColor( fref->GetColour() );
2256         CTUnderlineStyle ustyle = fref->GetUnderlined() ? kCTUnderlineStyleSingle : kCTUnderlineStyleNone ;
2257         wxCFRef<CFNumberRef> underlined( CFNumberCreate(NULL, kCFNumberSInt32Type, &ustyle) );
2258          CFStringRef keys[] = { kCTFontAttributeName , kCTForegroundColorAttributeName, kCTUnderlineStyleAttributeName };
2259         CFTypeRef values[] = { font, col, underlined };
2260         wxCFRef<CFDictionaryRef> attributes( CFDictionaryCreate(kCFAllocatorDefault, (const void**) &keys, (const void**) &values,
2261                                                         WXSIZEOF( keys ), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks) );
2262         wxCFRef<CFAttributedStringRef> attrtext( CFAttributedStringCreate(kCFAllocatorDefault, text, attributes) );
2263         wxCFRef<CTLineRef> line( CTLineCreateWithAttributedString(attrtext) );
2264
2265         y += CTFontGetAscent(font);
2266
2267         CGContextSaveGState(m_cgContext);
2268         CGContextTranslateCTM(m_cgContext, (CGFloat) x, (CGFloat) y);
2269         CGContextScaleCTM(m_cgContext, 1, -1);
2270         CGContextSetTextPosition(m_cgContext, 0, 0);
2271         CTLineDraw( line, m_cgContext );
2272         CGContextRestoreGState(m_cgContext);
2273         CFRelease( col );
2274         return;
2275     }
2276 #endif
2277 #if wxOSX_USE_ATSU_TEXT
2278     {
2279         DrawText(str, x, y, 0.0);
2280         return;
2281     }
2282 #endif
2283 #if wxOSX_USE_IPHONE
2284     wxMacCoreGraphicsFontData* fref = (wxMacCoreGraphicsFontData*)m_font.GetRefData();
2285
2286     CGContextSaveGState(m_cgContext);
2287
2288     CGColorRef col = wxMacCreateCGColor( fref->GetColour() );
2289     CGContextSetTextDrawingMode (m_cgContext, kCGTextFill);
2290     CGContextSetFillColorWithColor( m_cgContext, col );
2291
2292     wxCFStringRef text(str, wxLocale::GetSystemEncoding() );
2293     DrawTextInContext( m_cgContext, CGPointMake( x, y ), fref->GetUIFont() , text.AsNSString() );
2294
2295     CGContextRestoreGState(m_cgContext);
2296     CFRelease( col );
2297 #endif
2298 }
2299
2300 void wxMacCoreGraphicsContext::DoDrawRotatedText(const wxString &str,
2301                                                  wxDouble x, wxDouble y,
2302                                                  wxDouble angle)
2303 {
2304     wxCHECK_RET( !m_font.IsNull(), wxT("wxMacCoreGraphicsContext::DrawText - no valid font set") );
2305
2306     if (!EnsureIsValid())
2307         return;
2308
2309     if (m_composition == wxCOMPOSITION_DEST)
2310         return;
2311
2312 #if wxOSX_USE_CORE_TEXT
2313     if ( UMAGetSystemVersion() >= 0x1050 )
2314     {
2315         // default implementation takes care of rotation and calls non rotated DrawText afterwards
2316         wxGraphicsContext::DoDrawRotatedText( str, x, y, angle );
2317         return;
2318     }
2319 #endif
2320 #if wxOSX_USE_ATSU_TEXT
2321     {
2322         OSStatus status = noErr;
2323         ATSUTextLayout atsuLayout;
2324         wxMacUniCharBuffer unibuf( str );
2325         UniCharCount chars = unibuf.GetChars();
2326
2327         ATSUStyle style = (((wxMacCoreGraphicsFontData*)m_font.GetRefData())->GetATSUStyle());
2328         status = ::ATSUCreateTextLayoutWithTextPtr( unibuf.GetBuffer() , 0 , chars , chars , 1 ,
2329                                                    &chars , &style , &atsuLayout );
2330
2331         wxASSERT_MSG( status == noErr , wxT("couldn't create the layout of the rotated text") );
2332
2333         status = ::ATSUSetTransientFontMatching( atsuLayout , true );
2334         wxASSERT_MSG( status == noErr , wxT("couldn't setup transient font matching") );
2335
2336         int iAngle = int( angle * RAD2DEG );
2337         if ( abs(iAngle) > 0 )
2338         {
2339             Fixed atsuAngle = IntToFixed( iAngle );
2340             ATSUAttributeTag atsuTags[] =
2341             {
2342                 kATSULineRotationTag ,
2343             };
2344             ByteCount atsuSizes[WXSIZEOF(atsuTags)] =
2345             {
2346                 sizeof( Fixed ) ,
2347             };
2348             ATSUAttributeValuePtr    atsuValues[WXSIZEOF(atsuTags)] =
2349             {
2350                 &atsuAngle ,
2351             };
2352             status = ::ATSUSetLayoutControls(atsuLayout , WXSIZEOF(atsuTags),
2353                                              atsuTags, atsuSizes, atsuValues );
2354         }
2355
2356         {
2357             ATSUAttributeTag atsuTags[] =
2358             {
2359                 kATSUCGContextTag ,
2360             };
2361             ByteCount atsuSizes[WXSIZEOF(atsuTags)] =
2362             {
2363                 sizeof( CGContextRef ) ,
2364             };
2365             ATSUAttributeValuePtr    atsuValues[WXSIZEOF(atsuTags)] =
2366             {
2367                 &m_cgContext ,
2368             };
2369             status = ::ATSUSetLayoutControls(atsuLayout , WXSIZEOF(atsuTags),
2370                                              atsuTags, atsuSizes, atsuValues );
2371         }
2372
2373         ATSUTextMeasurement textBefore, textAfter;
2374         ATSUTextMeasurement ascent, descent;
2375
2376         status = ::ATSUGetUnjustifiedBounds( atsuLayout, kATSUFromTextBeginning, kATSUToTextEnd,
2377                                             &textBefore , &textAfter, &ascent , &descent );
2378
2379         wxASSERT_MSG( status == noErr , wxT("couldn't measure the rotated text") );
2380
2381         Rect rect;
2382         x += (int)(sin(angle) * FixedToFloat(ascent));
2383         y += (int)(cos(angle) * FixedToFloat(ascent));
2384
2385         status = ::ATSUMeasureTextImage( atsuLayout, kATSUFromTextBeginning, kATSUToTextEnd,
2386                                         IntToFixed(x) , IntToFixed(y) , &rect );
2387         wxASSERT_MSG( status == noErr , wxT("couldn't measure the rotated text") );
2388
2389         CGContextSaveGState(m_cgContext);
2390         CGContextTranslateCTM(m_cgContext, (CGFloat) x, (CGFloat) y);
2391         CGContextScaleCTM(m_cgContext, 1, -1);
2392         status = ::ATSUDrawText( atsuLayout, kATSUFromTextBeginning, kATSUToTextEnd,
2393                                 IntToFixed(0) , IntToFixed(0) );
2394
2395         wxASSERT_MSG( status == noErr , wxT("couldn't draw the rotated text") );
2396
2397         CGContextRestoreGState(m_cgContext);
2398
2399         ::ATSUDisposeTextLayout(atsuLayout);
2400
2401         return;
2402     }
2403 #endif
2404 #if wxOSX_USE_IPHONE
2405     // default implementation takes care of rotation and calls non rotated DrawText afterwards
2406     wxGraphicsContext::DoDrawRotatedText( str, x, y, angle );
2407 #endif
2408 }
2409
2410 void wxMacCoreGraphicsContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
2411                             wxDouble *descent, wxDouble *externalLeading ) const
2412 {
2413     wxCHECK_RET( !m_font.IsNull(), wxT("wxMacCoreGraphicsContext::GetTextExtent - no valid font set") );
2414
2415     if ( width )
2416         *width = 0;
2417     if ( height )
2418         *height = 0;
2419     if ( descent )
2420         *descent = 0;
2421     if ( externalLeading )
2422         *externalLeading = 0;
2423
2424     if (str.empty())
2425         return;
2426
2427 #if wxOSX_USE_CORE_TEXT
2428     if ( UMAGetSystemVersion() >= 0x1050 )
2429     {
2430         wxMacCoreGraphicsFontData* fref = (wxMacCoreGraphicsFontData*)m_font.GetRefData();
2431         CTFontRef font = fref->OSXGetCTFont();
2432
2433         wxCFStringRef text(str, wxLocale::GetSystemEncoding() );
2434         CFStringRef keys[] = { kCTFontAttributeName  };
2435         CFTypeRef values[] = { font };
2436         wxCFRef<CFDictionaryRef> attributes( CFDictionaryCreate(kCFAllocatorDefault, (const void**) &keys, (const void**) &values,
2437                                                                 WXSIZEOF( keys ), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks) );
2438         wxCFRef<CFAttributedStringRef> attrtext( CFAttributedStringCreate(kCFAllocatorDefault, text, attributes) );
2439         wxCFRef<CTLineRef> line( CTLineCreateWithAttributedString(attrtext) );
2440
2441         CGFloat a, d, l, w;
2442         w = CTLineGetTypographicBounds(line, &a, &d, &l);
2443
2444         if ( height )
2445             *height = a+d+l;
2446         if ( descent )
2447             *descent = d;
2448         if ( externalLeading )
2449             *externalLeading = l;
2450         if ( width )
2451             *width = w;
2452         return;
2453     }
2454 #endif
2455 #if wxOSX_USE_ATSU_TEXT
2456     {
2457         OSStatus status = noErr;
2458
2459         ATSUTextLayout atsuLayout;
2460         wxMacUniCharBuffer unibuf( str );
2461         UniCharCount chars = unibuf.GetChars();
2462
2463         ATSUStyle style = (((wxMacCoreGraphicsFontData*)m_font.GetRefData())->GetATSUStyle());
2464         status = ::ATSUCreateTextLayoutWithTextPtr( unibuf.GetBuffer() , 0 , chars , chars , 1 ,
2465                                                    &chars , &style , &atsuLayout );
2466
2467         wxASSERT_MSG( status == noErr , wxT("couldn't create the layout of the text") );
2468
2469         status = ::ATSUSetTransientFontMatching( atsuLayout , true );
2470         wxASSERT_MSG( status == noErr , wxT("couldn't setup transient font matching") );
2471
2472         ATSUTextMeasurement textBefore, textAfter;
2473         ATSUTextMeasurement textAscent, textDescent;
2474
2475         status = ::ATSUGetUnjustifiedBounds( atsuLayout, kATSUFromTextBeginning, kATSUToTextEnd,
2476                                             &textBefore , &textAfter, &textAscent , &textDescent );
2477
2478         if ( height )
2479             *height = FixedToFloat(textAscent + textDescent);
2480         if ( descent )
2481             *descent = FixedToFloat(textDescent);
2482         if ( externalLeading )
2483             *externalLeading = 0;
2484         if ( width )
2485             *width = FixedToFloat(textAfter - textBefore);
2486
2487         ::ATSUDisposeTextLayout(atsuLayout);
2488
2489         return;
2490     }
2491 #endif
2492 #if wxOSX_USE_IPHONE
2493     wxMacCoreGraphicsFontData* fref = (wxMacCoreGraphicsFontData*)m_font.GetRefData();
2494
2495     wxCFStringRef text(str, wxLocale::GetSystemEncoding() );
2496     CGSize sz = MeasureTextInContext( fref->GetUIFont() , text.AsNSString() );
2497
2498     if ( height )
2499         *height = sz.height;
2500         /*
2501     if ( descent )
2502         *descent = FixedToFloat(textDescent);
2503     if ( externalLeading )
2504         *externalLeading = 0;
2505         */
2506     if ( width )
2507         *width = sz.width;
2508 #endif
2509 }
2510
2511 void wxMacCoreGraphicsContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
2512 {
2513     widths.Empty();
2514     widths.Add(0, text.length());
2515
2516     wxCHECK_RET( !m_font.IsNull(), wxT("wxMacCoreGraphicsContext::DrawText - no valid font set") );
2517
2518     if (text.empty())
2519         return;
2520
2521 #if wxOSX_USE_CORE_TEXT
2522     {
2523         wxMacCoreGraphicsFontData* fref = (wxMacCoreGraphicsFontData*)m_font.GetRefData();
2524         CTFontRef font = fref->OSXGetCTFont();
2525
2526         wxCFStringRef t(text, wxLocale::GetSystemEncoding() );
2527         CFStringRef keys[] = { kCTFontAttributeName  };
2528         CFTypeRef values[] = { font };
2529         wxCFRef<CFDictionaryRef> attributes( CFDictionaryCreate(kCFAllocatorDefault, (const void**) &keys, (const void**) &values,
2530                                                                 WXSIZEOF( keys ), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks) );
2531         wxCFRef<CFAttributedStringRef> attrtext( CFAttributedStringCreate(kCFAllocatorDefault, t, attributes) );
2532         wxCFRef<CTLineRef> line( CTLineCreateWithAttributedString(attrtext) );
2533
2534         int chars = text.length();
2535         for ( int pos = 0; pos < (int)chars; pos ++ )
2536         {
2537             widths[pos] = CTLineGetOffsetForStringIndex( line, pos+1 , NULL );
2538         }
2539
2540         return;
2541     }
2542 #endif
2543 #if wxOSX_USE_ATSU_TEXT
2544     {
2545         OSStatus status = noErr;
2546         ATSUTextLayout atsuLayout;
2547         wxMacUniCharBuffer unibuf( text );
2548         UniCharCount chars = unibuf.GetChars();
2549
2550         ATSUStyle style = (((wxMacCoreGraphicsFontData*)m_font.GetRefData())->GetATSUStyle());
2551         status = ::ATSUCreateTextLayoutWithTextPtr( unibuf.GetBuffer() , 0 , chars , chars , 1 ,
2552                                           &chars , &style , &atsuLayout );
2553
2554         wxASSERT_MSG( status == noErr , wxT("couldn't create the layout of the text") );
2555
2556         status = ::ATSUSetTransientFontMatching( atsuLayout , true );
2557         wxASSERT_MSG( status == noErr , wxT("couldn't setup transient font matching") );
2558
2559 // new implementation from JS, keep old one just in case
2560 #if 0
2561         for ( int pos = 0; pos < (int)chars; pos ++ )
2562         {
2563             unsigned long actualNumberOfBounds = 0;
2564             ATSTrapezoid glyphBounds;
2565
2566             // We get a single bound, since the text should only require one. If it requires more, there is an issue
2567             OSStatus result;
2568             result = ATSUGetGlyphBounds( atsuLayout, 0, 0, kATSUFromTextBeginning, pos + 1,
2569                                         kATSUseDeviceOrigins, 1, &glyphBounds, &actualNumberOfBounds );
2570             if (result != noErr || actualNumberOfBounds != 1 )
2571                 return;
2572
2573             widths[pos] = FixedToFloat( glyphBounds.upperRight.x - glyphBounds.upperLeft.x );
2574             //unsigned char uch = s[i];
2575         }
2576 #else
2577         ATSLayoutRecord *layoutRecords = NULL;
2578         ItemCount glyphCount = 0;
2579
2580         // Get the glyph extents
2581         OSStatus err = ::ATSUDirectGetLayoutDataArrayPtrFromTextLayout(atsuLayout,
2582                                                                        0,
2583                                                                        kATSUDirectDataLayoutRecordATSLayoutRecordCurrent,
2584                                                                        (void **)
2585                                                                        &layoutRecords,
2586                                                                        &glyphCount);
2587         wxASSERT(glyphCount == (text.length()+1));
2588
2589         if ( err == noErr && glyphCount == (text.length()+1))
2590         {
2591             for ( int pos = 1; pos < (int)glyphCount ; pos ++ )
2592             {
2593                 widths[pos-1] = FixedToFloat( layoutRecords[pos].realPos );
2594             }
2595         }
2596
2597         ::ATSUDirectReleaseLayoutDataArrayPtr(NULL,
2598                                               kATSUDirectDataLayoutRecordATSLayoutRecordCurrent,
2599                                               (void **) &layoutRecords);
2600 #endif
2601         ::ATSUDisposeTextLayout(atsuLayout);
2602     }
2603 #endif
2604 #if wxOSX_USE_IPHONE
2605     // TODO core graphics text implementation here
2606 #endif
2607 }
2608
2609 void * wxMacCoreGraphicsContext::GetNativeContext()
2610 {
2611     return m_cgContext;
2612 }
2613
2614 // concatenates this transform with the current transform of this context
2615 void wxMacCoreGraphicsContext::ConcatTransform( const wxGraphicsMatrix& matrix )
2616 {
2617     if ( m_cgContext )
2618         CGContextConcatCTM( m_cgContext, *(CGAffineTransform*) matrix.GetNativeMatrix());
2619     else
2620         m_windowTransform = CGAffineTransformConcat(*(CGAffineTransform*) matrix.GetNativeMatrix(), m_windowTransform);
2621 }
2622
2623 // sets the transform of this context
2624 void wxMacCoreGraphicsContext::SetTransform( const wxGraphicsMatrix& matrix )
2625 {
2626     if ( m_cgContext )
2627     {
2628         CGAffineTransform transform = CGContextGetCTM( m_cgContext );
2629         transform = CGAffineTransformInvert( transform ) ;
2630         CGContextConcatCTM( m_cgContext, transform);
2631         CGContextConcatCTM( m_cgContext, *(CGAffineTransform*) matrix.GetNativeMatrix());
2632     }
2633     else
2634     {
2635         m_windowTransform = *(CGAffineTransform*) matrix.GetNativeMatrix();
2636     }
2637 }
2638
2639 // gets the matrix of this context
2640 wxGraphicsMatrix wxMacCoreGraphicsContext::GetTransform() const
2641 {
2642     wxGraphicsMatrix m = CreateMatrix();
2643     *((CGAffineTransform*) m.GetNativeMatrix()) = ( m_cgContext == NULL ? m_windowTransform :
2644         CGContextGetCTM( m_cgContext ));
2645     return m;
2646 }
2647
2648 //
2649 // Renderer
2650 //
2651
2652 //-----------------------------------------------------------------------------
2653 // wxMacCoreGraphicsRenderer declaration
2654 //-----------------------------------------------------------------------------
2655
2656 class WXDLLIMPEXP_CORE wxMacCoreGraphicsRenderer : public wxGraphicsRenderer
2657 {
2658 public :
2659     wxMacCoreGraphicsRenderer() {}
2660
2661     virtual ~wxMacCoreGraphicsRenderer() {}
2662
2663     // Context
2664
2665     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
2666     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
2667 #if wxUSE_PRINTING_ARCHITECTURE
2668     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
2669 #endif
2670
2671     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
2672
2673     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
2674
2675     virtual wxGraphicsContext * CreateContext( wxWindow* window );
2676
2677     virtual wxGraphicsContext * CreateMeasuringContext();
2678
2679     // Path
2680
2681     virtual wxGraphicsPath CreatePath();
2682
2683     // Matrix
2684
2685     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
2686         wxDouble tx=0.0, wxDouble ty=0.0);
2687
2688
2689     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
2690
2691     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
2692
2693     virtual wxGraphicsBrush
2694     CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2695                               wxDouble x2, wxDouble y2,
2696                               const wxGraphicsGradientStops& stops);
2697
2698     virtual wxGraphicsBrush
2699     CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2700                               wxDouble xc, wxDouble yc,
2701                               wxDouble radius,
2702                               const wxGraphicsGradientStops& stops);
2703
2704    // sets the font
2705     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
2706
2707     // create a native bitmap representation
2708     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap ) ;
2709
2710     // create a graphics bitmap from a native bitmap
2711     virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
2712
2713     // create a native bitmap representation
2714     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  ) ;
2715 private :
2716     DECLARE_DYNAMIC_CLASS_NO_COPY(wxMacCoreGraphicsRenderer)
2717 } ;
2718
2719 //-----------------------------------------------------------------------------
2720 // wxMacCoreGraphicsRenderer implementation
2721 //-----------------------------------------------------------------------------
2722
2723 IMPLEMENT_DYNAMIC_CLASS(wxMacCoreGraphicsRenderer,wxGraphicsRenderer)
2724
2725 static wxMacCoreGraphicsRenderer gs_MacCoreGraphicsRenderer;
2726
2727 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
2728 {
2729     return &gs_MacCoreGraphicsRenderer;
2730 }
2731
2732 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContext( const wxWindowDC& dc )
2733 {
2734     const wxDCImpl* impl = dc.GetImpl();
2735     wxWindowDCImpl *win_impl = wxDynamicCast( impl, wxWindowDCImpl );
2736     if (win_impl)
2737     {
2738         int w, h;
2739         win_impl->GetSize( &w, &h );
2740         CGContextRef cgctx = 0;
2741
2742         wxASSERT_MSG(win_impl->GetWindow(), "Invalid wxWindow in wxMacCoreGraphicsRenderer::CreateContext");
2743         if (win_impl->GetWindow())
2744             cgctx =  (CGContextRef)(win_impl->GetWindow()->MacGetCGContextRef());
2745
2746         // having a cgctx being NULL is fine (will be created on demand)
2747         // this is the case for all wxWindowDCs except wxPaintDC
2748         wxMacCoreGraphicsContext *context =
2749             new wxMacCoreGraphicsContext( this, cgctx, (wxDouble) w, (wxDouble) h );
2750         context->EnableOffset(true);
2751         return context;
2752     }
2753     return NULL;
2754 }
2755
2756 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContext( const wxMemoryDC& dc )
2757 {
2758 #ifdef __WXMAC__
2759     const wxDCImpl* impl = dc.GetImpl();
2760     wxMemoryDCImpl *mem_impl = wxDynamicCast( impl, wxMemoryDCImpl );
2761     if (mem_impl)
2762     {
2763         int w, h;
2764         mem_impl->GetSize( &w, &h );
2765         wxMacCoreGraphicsContext* context = new wxMacCoreGraphicsContext( this,
2766             (CGContextRef)(mem_impl->GetGraphicsContext()->GetNativeContext()), (wxDouble) w, (wxDouble) h );
2767         context->EnableOffset(true);
2768         return context;
2769     }
2770 #endif
2771     return NULL;
2772 }
2773
2774 #if wxUSE_PRINTING_ARCHITECTURE
2775 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContext( const wxPrinterDC& dc )
2776 {
2777 #ifdef __WXMAC__
2778     const wxDCImpl* impl = dc.GetImpl();
2779     wxPrinterDCImpl *print_impl = wxDynamicCast( impl, wxPrinterDCImpl );
2780     if (print_impl)
2781     {
2782         int w, h;
2783         print_impl->GetSize( &w, &h );
2784         return new wxMacCoreGraphicsContext( this,
2785             (CGContextRef)(print_impl->GetGraphicsContext()->GetNativeContext()), (wxDouble) w, (wxDouble) h );
2786     }
2787 #endif
2788     return NULL;
2789 }
2790 #endif
2791
2792 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContextFromNativeContext( void * context )
2793 {
2794     return new wxMacCoreGraphicsContext(this,(CGContextRef)context);
2795 }
2796
2797 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContextFromNativeWindow( void * window )
2798 {
2799 #if wxOSX_USE_CARBON
2800     wxMacCoreGraphicsContext* context = new wxMacCoreGraphicsContext(this,(WindowRef)window);
2801     context->EnableOffset(true);
2802     return context;
2803 #else
2804     wxUnusedVar(window);
2805     return NULL;
2806 #endif
2807 }
2808
2809 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContext( wxWindow* window )
2810 {
2811     return new wxMacCoreGraphicsContext(this, window );
2812 }
2813
2814 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateMeasuringContext()
2815 {
2816     return new wxMacCoreGraphicsContext(this);
2817 }
2818
2819 // Path
2820
2821 wxGraphicsPath wxMacCoreGraphicsRenderer::CreatePath()
2822 {
2823     wxGraphicsPath m;
2824     m.SetRefData( new wxMacCoreGraphicsPathData(this));
2825     return m;
2826 }
2827
2828
2829 // Matrix
2830
2831 wxGraphicsMatrix wxMacCoreGraphicsRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
2832     wxDouble tx, wxDouble ty)
2833 {
2834     wxGraphicsMatrix m;
2835     wxMacCoreGraphicsMatrixData* data = new wxMacCoreGraphicsMatrixData( this );
2836     data->Set( a,b,c,d,tx,ty ) ;
2837     m.SetRefData(data);
2838     return m;
2839 }
2840
2841 wxGraphicsPen wxMacCoreGraphicsRenderer::CreatePen(const wxPen& pen)
2842 {
2843     if ( !pen.IsOk() || pen.GetStyle() == wxTRANSPARENT )
2844         return wxNullGraphicsPen;
2845     else
2846     {
2847         wxGraphicsPen p;
2848         p.SetRefData(new wxMacCoreGraphicsPenData( this, pen ));
2849         return p;
2850     }
2851 }
2852
2853 wxGraphicsBrush wxMacCoreGraphicsRenderer::CreateBrush(const wxBrush& brush )
2854 {
2855     if ( !brush.IsOk() || brush.GetStyle() == wxTRANSPARENT )
2856         return wxNullGraphicsBrush;
2857     else
2858     {
2859         wxGraphicsBrush p;
2860         p.SetRefData(new wxMacCoreGraphicsBrushData( this, brush ));
2861         return p;
2862     }
2863 }
2864
2865 wxGraphicsBitmap wxMacCoreGraphicsRenderer::CreateBitmap( const wxBitmap& bmp )
2866 {
2867     if ( bmp.IsOk() )
2868     {
2869         wxGraphicsBitmap p;
2870         p.SetRefData(new wxMacCoreGraphicsBitmapData( this , bmp.CreateCGImage(), bmp.GetDepth() == 1 ) );
2871         return p;
2872     }
2873     else
2874         return wxNullGraphicsBitmap;
2875 }
2876
2877 wxGraphicsBitmap wxMacCoreGraphicsRenderer::CreateBitmapFromNativeBitmap( void* bitmap )
2878 {
2879     if ( bitmap != NULL )
2880     {
2881         wxGraphicsBitmap p;
2882         p.SetRefData(new wxMacCoreGraphicsBitmapData( this , (CGImageRef) bitmap, false ));
2883         return p;
2884     }
2885     else
2886         return wxNullGraphicsBitmap;
2887 }
2888
2889 wxGraphicsBitmap wxMacCoreGraphicsRenderer::CreateSubBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h  )
2890 {
2891     wxMacCoreGraphicsBitmapData* refdata  =static_cast<wxMacCoreGraphicsBitmapData*>(bmp.GetRefData());
2892     CGImageRef img = refdata->GetBitmap();
2893     if ( img )
2894     {
2895         wxGraphicsBitmap p;
2896         CGImageRef subimg = CGImageCreateWithImageInRect(img,CGRectMake( (CGFloat) x , (CGFloat) y , (CGFloat) w , (CGFloat) h ));
2897         p.SetRefData(new wxMacCoreGraphicsBitmapData( this , subimg, refdata->IsMonochrome() ) );
2898         return p;
2899     }
2900     else
2901         return wxNullGraphicsBitmap;
2902 }
2903
2904 wxGraphicsBrush
2905 wxMacCoreGraphicsRenderer::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2906                                                      wxDouble x2, wxDouble y2,
2907                                                      const wxGraphicsGradientStops& stops)
2908 {
2909     wxGraphicsBrush p;
2910     wxMacCoreGraphicsBrushData* d = new wxMacCoreGraphicsBrushData( this );
2911     d->CreateLinearGradientBrush(x1, y1, x2, y2, stops);
2912     p.SetRefData(d);
2913     return p;
2914 }
2915
2916 wxGraphicsBrush
2917 wxMacCoreGraphicsRenderer::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2918                                                      wxDouble xc, wxDouble yc,
2919                                                      wxDouble radius,
2920                                                      const wxGraphicsGradientStops& stops)
2921 {
2922     wxGraphicsBrush p;
2923     wxMacCoreGraphicsBrushData* d = new wxMacCoreGraphicsBrushData( this );
2924     d->CreateRadialGradientBrush(xo, yo, xc, yc, radius, stops);
2925     p.SetRefData(d);
2926     return p;
2927 }
2928
2929 // sets the font
2930 wxGraphicsFont wxMacCoreGraphicsRenderer::CreateFont( const wxFont &font , const wxColour &col )
2931 {
2932     if ( font.IsOk() )
2933     {
2934         wxGraphicsFont p;
2935         p.SetRefData(new wxMacCoreGraphicsFontData( this , font, col ));
2936         return p;
2937     }
2938     else
2939         return wxNullGraphicsFont;
2940 }
2941
2942 //
2943 // CoreGraphics Helper Methods
2944 //
2945
2946 // Data Providers and Consumers
2947
2948 size_t UMAPutBytesCFRefCallback( void *info, const void *bytes, size_t count )
2949 {
2950     CFMutableDataRef data = (CFMutableDataRef) info;
2951     if ( data )
2952     {
2953         CFDataAppendBytes( data, (const UInt8*) bytes, count );
2954     }
2955     return count;
2956 }
2957
2958 void wxMacReleaseCFDataProviderCallback(void *info,
2959                                       const void *WXUNUSED(data),
2960                                       size_t WXUNUSED(count))
2961 {
2962     if ( info )
2963         CFRelease( (CFDataRef) info );
2964 }
2965
2966 void wxMacReleaseCFDataConsumerCallback( void *info )
2967 {
2968     if ( info )
2969         CFRelease( (CFDataRef) info );
2970 }
2971
2972 CGDataProviderRef wxMacCGDataProviderCreateWithCFData( CFDataRef data )
2973 {
2974     if ( data == NULL )
2975         return NULL;
2976
2977     return CGDataProviderCreateWithCFData( data );
2978 }
2979
2980 CGDataConsumerRef wxMacCGDataConsumerCreateWithCFData( CFMutableDataRef data )
2981 {
2982     if ( data == NULL )
2983         return NULL;
2984
2985     return CGDataConsumerCreateWithCFData( data );
2986 }
2987
2988 void
2989 wxMacReleaseMemoryBufferProviderCallback(void *info,
2990                                          const void * WXUNUSED_UNLESS_DEBUG(data),
2991                                          size_t WXUNUSED(size))
2992 {
2993     wxMemoryBuffer* membuf = (wxMemoryBuffer*) info ;
2994
2995     wxASSERT( data == membuf->GetData() ) ;
2996
2997     delete membuf ;
2998 }
2999
3000 CGDataProviderRef wxMacCGDataProviderCreateWithMemoryBuffer( const wxMemoryBuffer& buf )
3001 {
3002     wxMemoryBuffer* b = new wxMemoryBuffer( buf );
3003     if ( b->GetDataLen() == 0 )
3004         return NULL;
3005
3006     return CGDataProviderCreateWithData( b , (const void *) b->GetData() , b->GetDataLen() ,
3007                                                  wxMacReleaseMemoryBufferProviderCallback );
3008 }