src/osx/core/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/core/bitmap.cpp
   3 // Purpose:     wxBitmap
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #include "wx/bitmap.h"
  15
  16 #ifndef WX_PRECOMP
  17     #include "wx/log.h"
  18     #include "wx/dcmemory.h"
  19     #include "wx/icon.h"
  20     #include "wx/image.h"
  21 #endif
  22
  23 #include "wx/metafile.h"
  24 #include "wx/xpmdecod.h"
  25
  26 #include "wx/rawbmp.h"
  27
  28 IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
  29 IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
  30
  31 #if wxOSX_USE_CARBON
  32 #include "wx/osx/uma.h"
  33 #else
  34 #include "wx/osx/private.h"
  35 #endif
  36
  37 #ifndef __WXOSX_IPHONE__
  38 #include <QuickTime/QuickTime.h>
  39 #endif
  40
  41 CGColorSpaceRef wxMacGetGenericRGBColorSpace();
  42 CGDataProviderRef wxMacCGDataProviderCreateWithMemoryBuffer( const wxMemoryBuffer& buf );
  43
  44 // Implementation Notes
  45 // --------------------
  46 //
  47 // we are always working with a 32 bit deep pixel buffer
  48 // under QuickDraw its alpha parts are going to be ignored in the GWorld,
  49 // therefore we have a separate GWorld there for blitting the mask in
  50
  51 // under Quartz then content is transformed into a CGImageRef representing the same data
  52 // which can be transferred to the GPU by the OS for fast rendering
  53
  54 class WXDLLEXPORT wxBitmapRefData: public wxGDIRefData
  55 {
  56     friend class WXDLLIMPEXP_FWD_CORE wxIcon;
  57     friend class WXDLLIMPEXP_FWD_CORE wxCursor;
  58 public:
  59     wxBitmapRefData(int width , int height , int depth);
  60     wxBitmapRefData();
  61     wxBitmapRefData(const wxBitmapRefData &tocopy);
  62
  63     virtual ~wxBitmapRefData();
  64
  65     virtual bool IsOk() const { return m_ok; }
  66
  67     void Free();
  68     void SetOk( bool isOk) { m_ok = isOk; }
  69
  70     void SetWidth( int width ) { m_width = width; }
  71     void SetHeight( int height ) { m_height = height; }
  72     void SetDepth( int depth ) { m_depth = depth; }
  73
  74     int GetWidth() const { return m_width; }
  75     int GetHeight() const { return m_height; }
  76     int GetDepth() const { return m_depth; }
  77
  78     void *GetRawAccess() const;
  79     void *BeginRawAccess();
  80     void EndRawAccess();
  81
  82     bool HasAlpha() const { return m_hasAlpha; }
  83     void UseAlpha( bool useAlpha );
  84
  85 public:
  86 #if wxUSE_PALETTE
  87     wxPalette     m_bitmapPalette;
  88 #endif // wxUSE_PALETTE
  89
  90     wxMask *      m_bitmapMask; // Optional mask
  91     CGImageRef    CreateCGImage() const;
  92
  93     // returns true if the bitmap has a size that
  94     // can be natively transferred into a true icon
  95     // if no is returned GetIconRef will still produce
  96     // an icon but it will be generated via a PICT and
  97     // rescaled to 16 x 16
  98     bool          HasNativeSize();
  99
 100     // caller should increase ref count if needed longer
 101     // than the bitmap exists
 102     IconRef       GetIconRef();
 103
 104 #ifndef __WXOSX_IPHONE__
 105     // returns a Pict from the bitmap content
 106     PicHandle     GetPictHandle();
 107 #endif
 108
 109     CGContextRef  GetBitmapContext() const;
 110
 111     int           GetBytesPerRow() const { return m_bytesPerRow; }
 112     private :
 113     bool Create(int width , int height , int depth);
 114     void Init();
 115
 116     int           m_width;
 117     int           m_height;
 118     int           m_bytesPerRow;
 119     int           m_depth;
 120     bool          m_hasAlpha;
 121     wxMemoryBuffer m_memBuf;
 122     int           m_rawAccessCount;
 123     bool          m_ok;
 124     mutable CGImageRef    m_cgImageRef;
 125
 126     IconRef       m_iconRef;
 127 #ifndef __WXOSX_IPHONE__
 128     PicHandle     m_pictHandle;
 129 #endif
 130     CGContextRef  m_hBitmap;
 131 };
 132
 133
 134 #define wxOSX_USE_PREMULTIPLIED_ALPHA 1
 135 static const int kBestByteAlignement = 16;
 136 static const int kMaskBytesPerPixel = 1;
 137
 138 static int GetBestBytesPerRow( int rawBytes )
 139 {
 140     return (((rawBytes)+kBestByteAlignement-1) & ~(kBestByteAlignement-1) );
 141 }
 142
 143 #if wxUSE_GUI && !defined(__WXOSX_IPHONE__)
 144
 145 // this is used for more controls than just the wxBitmap button, also for notebooks etc
 146
 147 void wxMacCreateBitmapButton( ControlButtonContentInfo*info , const wxBitmap& bitmap , int forceType )
 148 {
 149     memset( info , 0 , sizeof(ControlButtonContentInfo) ) ;
 150     if ( bitmap.Ok() )
 151     {
 152         wxBitmapRefData * bmap = bitmap.GetBitmapData() ;
 153         if ( bmap == NULL )
 154             return ;
 155
 156         if ( forceType == 0  )
 157         {
 158             forceType = kControlContentCGImageRef;
 159         }
 160
 161         if ( forceType == kControlContentIconRef )
 162         {
 163             wxBitmap scaleBmp ;
 164             wxBitmapRefData* bmp = bmap ;
 165
 166             if ( !bmap->HasNativeSize() )
 167             {
 168                 // as PICT conversion will only result in a 16x16 icon, let's attempt
 169                 // a few scales for better results
 170
 171                 int w = bitmap.GetWidth() ;
 172                 int h = bitmap.GetHeight() ;
 173                 int sz = wxMax( w , h ) ;
 174                 if ( sz == 24 || sz == 64 )
 175                 {
 176                     scaleBmp = wxBitmap( bitmap.ConvertToImage().Scale( w * 2 , h * 2 ) ) ;
 177                     bmp = scaleBmp.GetBitmapData() ;
 178                 }
 179             }
 180
 181             info->contentType = kControlContentIconRef ;
 182             info->u.iconRef = bmp->GetIconRef() ;
 183             AcquireIconRef( info->u.iconRef ) ;
 184         }
 185         else if ( forceType == kControlContentCGImageRef )
 186         {
 187             info->contentType = kControlContentCGImageRef ;
 188             info->u.imageRef = (CGImageRef) bmap->CreateCGImage() ;
 189         }
 190         else
 191         {
 192 #ifndef __LP64__
 193             info->contentType = kControlContentPictHandle ;
 194             info->u.picture = bmap->GetPictHandle() ;
 195 #endif
 196         }
 197     }
 198 }
 199
 200 CGImageRef wxMacCreateCGImageFromBitmap( const wxBitmap& bitmap )
 201 {
 202     wxBitmapRefData * bmap = bitmap.GetBitmapData() ;
 203     if ( bmap == NULL )
 204         return NULL ;
 205     return (CGImageRef) bmap->CreateCGImage();
 206 }
 207
 208 void wxMacReleaseBitmapButton( ControlButtonContentInfo*info )
 209 {
 210     if ( info->contentType == kControlContentIconRef )
 211     {
 212         ReleaseIconRef( info->u.iconRef ) ;
 213     }
 214     else if ( info->contentType == kControlNoContent )
 215     {
 216         // there's no bitmap at all, fall through silently
 217     }
 218     else if ( info->contentType == kControlContentPictHandle )
 219     {
 220         // owned by the bitmap, no release here
 221     }
 222     else if ( info->contentType == kControlContentCGImageRef )
 223     {
 224         CGImageRelease( info->u.imageRef ) ;
 225     }
 226     else
 227     {
 228         wxFAIL_MSG(wxT("Unexpected bitmap type") ) ;
 229     }
 230 }
 231
 232 #endif //wxUSE_BMPBUTTON
 233
 234 #define M_BITMAPDATA ((wxBitmapRefData *)m_refData)
 235
 236 void wxBitmapRefData::Init()
 237 {
 238     m_width = 0 ;
 239     m_height = 0 ;
 240     m_depth = 0 ;
 241     m_bytesPerRow = 0;
 242     m_ok = false ;
 243     m_bitmapMask = NULL ;
 244     m_cgImageRef = NULL ;
 245
 246 #ifndef __WXOSX_IPHONE__
 247     m_iconRef = NULL ;
 248     m_pictHandle = NULL ;
 249 #endif
 250     m_hBitmap = NULL ;
 251
 252     m_rawAccessCount = 0 ;
 253     m_hasAlpha = false;
 254 }
 255
 256 wxBitmapRefData::wxBitmapRefData(const wxBitmapRefData &tocopy)
 257 {
 258     Init();
 259     Create(tocopy.m_width, tocopy.m_height, tocopy.m_depth);
 260
 261     if (tocopy.m_bitmapMask)
 262         m_bitmapMask = new wxMask(*tocopy.m_bitmapMask);
 263     else if (tocopy.m_hasAlpha)
 264         UseAlpha(true);
 265
 266     unsigned char* dest = (unsigned char*)GetRawAccess();
 267     unsigned char* source = (unsigned char*)tocopy.GetRawAccess();
 268     size_t numbytes = m_bytesPerRow * m_height;
 269     memcpy( dest, source, numbytes );
 270 }
 271
 272 wxBitmapRefData::wxBitmapRefData()
 273 {
 274     Init() ;
 275 }
 276
 277 wxBitmapRefData::wxBitmapRefData( int w , int h , int d )
 278 {
 279     Init() ;
 280     Create( w , h , d ) ;
 281 }
 282
 283 bool wxBitmapRefData::Create( int w , int h , int d )
 284 {
 285     m_width = wxMax(1, w);
 286     m_height = wxMax(1, h);
 287     m_depth = d ;
 288     m_hBitmap = NULL ;
 289
 290     m_bytesPerRow = GetBestBytesPerRow( w * 4 ) ;
 291     size_t size = m_bytesPerRow * h ;
 292     void* data = m_memBuf.GetWriteBuf( size ) ;
 293     if ( data != NULL )
 294     {
 295         memset( data , 0 , size ) ;
 296         m_memBuf.UngetWriteBuf( size ) ;
 297
 298         m_hBitmap = CGBitmapContextCreate((char*) data, m_width, m_height, 8, m_bytesPerRow, wxMacGetGenericRGBColorSpace(), kCGImageAlphaNoneSkipFirst );
 299         wxASSERT_MSG( m_hBitmap , wxT("Unable to create CGBitmapContext context") ) ;
 300         CGContextTranslateCTM( m_hBitmap, 0,  m_height );
 301         CGContextScaleCTM( m_hBitmap, 1, -1 );
 302     } /* data != NULL */
 303     m_ok = ( m_hBitmap != NULL ) ;
 304
 305     return m_ok ;
 306 }
 307
 308 void wxBitmapRefData::UseAlpha( bool use )
 309 {
 310     if ( m_hasAlpha == use )
 311         return ;
 312
 313     m_hasAlpha = use ;
 314
 315     CGContextRelease( m_hBitmap );
 316     m_hBitmap = CGBitmapContextCreate((char*) m_memBuf.GetData(), m_width, m_height, 8, m_bytesPerRow, wxMacGetGenericRGBColorSpace(), m_hasAlpha ? kCGImageAlphaPremultipliedFirst : kCGImageAlphaNoneSkipFirst );
 317     wxASSERT_MSG( m_hBitmap , wxT("Unable to create CGBitmapContext context") ) ;
 318     CGContextTranslateCTM( m_hBitmap, 0,  m_height );
 319     CGContextScaleCTM( m_hBitmap, 1, -1 );
 320 }
 321
 322 void *wxBitmapRefData::GetRawAccess() const
 323 {
 324     wxCHECK_MSG( IsOk(), NULL , wxT("invalid bitmap") ) ;
 325     return m_memBuf.GetData() ;
 326 }
 327
 328 void *wxBitmapRefData::BeginRawAccess()
 329 {
 330     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") ) ;
 331     wxASSERT( m_rawAccessCount == 0 ) ;
 332 #ifndef __WXOSX_IPHONE__
 333     wxASSERT_MSG( m_pictHandle == NULL && m_iconRef == NULL ,
 334         wxT("Currently, modifing bitmaps that are used in controls already is not supported") ) ;
 335 #endif
 336     ++m_rawAccessCount ;
 337
 338     // we must destroy an existing cached image, as
 339     // the bitmap data may change now
 340     if ( m_cgImageRef )
 341     {
 342         CGImageRelease( m_cgImageRef ) ;
 343         m_cgImageRef = NULL ;
 344     }
 345
 346     return m_memBuf.GetData() ;
 347 }
 348
 349 void wxBitmapRefData::EndRawAccess()
 350 {
 351     wxCHECK_RET( IsOk() , wxT("invalid bitmap") ) ;
 352     wxASSERT( m_rawAccessCount == 1 ) ;
 353
 354     --m_rawAccessCount ;
 355 }
 356
 357 bool wxBitmapRefData::HasNativeSize()
 358 {
 359     int w = GetWidth() ;
 360     int h = GetHeight() ;
 361     int sz = wxMax( w , h ) ;
 362
 363     return ( sz == 128 || sz == 48 || sz == 32 || sz == 16 );
 364 }
 365
 366 #ifndef __WXOSX_IPHONE__
 367 IconRef wxBitmapRefData::GetIconRef()
 368 {
 369     if ( m_iconRef == NULL )
 370     {
 371         // Create Icon Family Handle
 372
 373         IconFamilyHandle iconFamily = (IconFamilyHandle) NewHandle( 0 );
 374
 375         int w = GetWidth() ;
 376         int h = GetHeight() ;
 377         int sz = wxMax( w , h ) ;
 378
 379         OSType dataType = 0 ;
 380         OSType maskType = 0 ;
 381
 382         switch (sz)
 383         {
 384             case 128:
 385 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
 386                 if ( UMAGetSystemVersion() >= 0x1050 )
 387                 {
 388                     dataType = kIconServices128PixelDataARGB ;
 389                 }
 390                 else
 391 #endif
 392                 {
 393                     dataType = kThumbnail32BitData ;
 394                     maskType = kThumbnail8BitMask ;
 395                 }
 396                 break;
 397
 398             case 48:
 399 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
 400                 if ( UMAGetSystemVersion() >= 0x1050 )
 401                 {
 402                     dataType = kIconServices48PixelDataARGB ;
 403                 }
 404                 else
 405 #endif
 406                 {
 407                     dataType = kHuge32BitData ;
 408                     maskType = kHuge8BitMask ;
 409                 }
 410                 break;
 411
 412             case 32:
 413 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
 414                 if ( UMAGetSystemVersion() >= 0x1050 )
 415                 {
 416                     dataType = kIconServices32PixelDataARGB ;
 417                 }
 418                 else
 419 #endif
 420                 {
 421                     dataType = kLarge32BitData ;
 422                     maskType = kLarge8BitMask ;
 423                 }
 424                 break;
 425
 426             case 16:
 427 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
 428                 if ( UMAGetSystemVersion() >= 0x1050 )
 429                 {
 430                     dataType = kIconServices16PixelDataARGB ;
 431                 }
 432                 else
 433 #endif
 434                 {
 435                     dataType = kSmall32BitData ;
 436                     maskType = kSmall8BitMask ;
 437                 }
 438                 break;
 439
 440             default:
 441                 break;
 442         }
 443
 444         if ( dataType != 0 )
 445         {
 446 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
 447             if (  maskType == 0 && UMAGetSystemVersion() >= 0x1050 )
 448             {
 449                 size_t datasize = sz * sz * 4 ;
 450                 Handle data = NewHandle( datasize ) ;
 451                 HLock( data ) ;
 452                 unsigned char* ptr = (unsigned char*) *data ;
 453                 memset( ptr, 0, datasize );
 454                 bool hasAlpha = HasAlpha() ;
 455                 wxMask *mask = m_bitmapMask ;
 456                 unsigned char * sourcePtr = (unsigned char*) GetRawAccess() ;
 457                 unsigned char * masksourcePtr = mask ? (unsigned char*) mask->GetRawAccess() : NULL ;
 458
 459                 for ( int y = 0 ; y < h ; ++y, sourcePtr += m_bytesPerRow , masksourcePtr += mask ? mask->GetBytesPerRow() : 0 )
 460                 {
 461                     unsigned char * source = sourcePtr;
 462                     unsigned char * masksource = masksourcePtr;
 463                     unsigned char * dest = ptr + y * sz * 4 ;
 464                     unsigned char a, r, g, b;
 465
 466                     for ( int x = 0 ; x < w ; ++x )
 467                     {
 468                         a = *source ++ ;
 469                         r = *source ++ ;
 470                         g = *source ++ ;
 471                         b = *source ++ ;
 472
 473                         if ( mask )
 474                         {
 475                             a = 0xFF - *masksource++ ;
 476                         }
 477                         else if ( !hasAlpha )
 478                             a = 0xFF ;
 479                         else
 480                         {
 481 #if wxOSX_USE_PREMULTIPLIED_ALPHA
 482                             // this must be non-premultiplied data
 483                             if ( a != 0xFF && a!= 0 )
 484                             {
 485                                 r = r * 255 / a;
 486                                 g = g * 255 / a;
 487                                 b = b * 255 / a;
 488                             }
 489 #endif
 490                         }
 491                         *dest++ = a ;
 492                         *dest++ = r ;
 493                         *dest++ = g ;
 494                         *dest++ = b ;
 495
 496                      }
 497                 }
 498                 HUnlock( data );
 499
 500                 OSStatus err = SetIconFamilyData( iconFamily, dataType , data );
 501                 if ( err != noErr )
 502                 {
 503                     wxFAIL_MSG("Error when adding bitmap");
 504                 }
 505
 506                 DisposeHandle( data );
 507             }
 508             else
 509 #endif
 510             {
 511                 // setup the header properly
 512
 513                 Handle data = NULL ;
 514                 Handle maskdata = NULL ;
 515                 unsigned char * maskptr = NULL ;
 516                 unsigned char * ptr = NULL ;
 517                 size_t datasize, masksize ;
 518
 519                 datasize = sz * sz * 4 ;
 520                 data = NewHandle( datasize ) ;
 521                 HLock( data ) ;
 522                 ptr = (unsigned char*) *data ;
 523                 memset( ptr , 0, datasize ) ;
 524
 525                 masksize = sz * sz ;
 526                 maskdata = NewHandle( masksize ) ;
 527                 HLock( maskdata ) ;
 528                 maskptr = (unsigned char*) *maskdata ;
 529                 memset( maskptr , 0 , masksize ) ;
 530
 531                 bool hasAlpha = HasAlpha() ;
 532                 wxMask *mask = m_bitmapMask ;
 533                 unsigned char * sourcePtr = (unsigned char*) GetRawAccess() ;
 534                 unsigned char * masksourcePtr = mask ? (unsigned char*) mask->GetRawAccess() : NULL ;
 535
 536                 for ( int y = 0 ; y < h ; ++y, sourcePtr += m_bytesPerRow , masksourcePtr += mask ? mask->GetBytesPerRow() : 0 )
 537                 {
 538                     unsigned char * source = sourcePtr;
 539                     unsigned char * masksource = masksourcePtr;
 540                     unsigned char * dest = ptr + y * sz * 4 ;
 541                     unsigned char * maskdest = maskptr + y * sz ;
 542                     unsigned char a, r, g, b;
 543
 544                     for ( int x = 0 ; x < w ; ++x )
 545                     {
 546                         a = *source ++ ;
 547                         r = *source ++ ;
 548                         g = *source ++ ;
 549                         b = *source ++ ;
 550
 551                         *dest++ = 0 ;
 552                         *dest++ = r ;
 553                         *dest++ = g ;
 554                         *dest++ = b ;
 555
 556                         if ( mask )
 557                             *maskdest++ = 0xFF - *masksource++ ;
 558                         else if ( hasAlpha )
 559                             *maskdest++ = a ;
 560                         else
 561                             *maskdest++ = 0xFF ;
 562                     }
 563                 }
 564
 565                 OSStatus err = SetIconFamilyData( iconFamily, dataType , data ) ;
 566                 wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 567
 568                 err = SetIconFamilyData( iconFamily, maskType , maskdata ) ;
 569                 wxASSERT_MSG( err == noErr , wxT("Error when adding mask") ) ;
 570
 571                 HUnlock( data ) ;
 572                 HUnlock( maskdata ) ;
 573                 DisposeHandle( data ) ;
 574                 DisposeHandle( maskdata ) ;
 575             }
 576         }
 577         else
 578         {
 579             PicHandle pic = GetPictHandle() ;
 580             SetIconFamilyData( iconFamily, 'PICT' , (Handle) pic ) ;
 581         }
 582         // transform into IconRef
 583
 584         // cleaner version existing from 10.3 upwards
 585         HLock((Handle) iconFamily);
 586         OSStatus err = GetIconRefFromIconFamilyPtr( *iconFamily, GetHandleSize((Handle) iconFamily), &m_iconRef );
 587         HUnlock((Handle) iconFamily);
 588         DisposeHandle( (Handle) iconFamily ) ;
 589
 590         wxCHECK_MSG( err == noErr, NULL, wxT("Error when constructing icon ref") );
 591     }
 592
 593     return m_iconRef ;
 594 }
 595
 596 PicHandle wxBitmapRefData::GetPictHandle()
 597 {
 598     if ( m_pictHandle == NULL )
 599     {
 600 #ifndef __LP64__
 601         GraphicsExportComponent exporter = 0;
 602         OSStatus err = OpenADefaultComponent(GraphicsExporterComponentType, kQTFileTypePicture, &exporter);
 603         if (noErr == err)
 604         {
 605             m_pictHandle = (PicHandle) NewHandle(0);
 606             if ( m_pictHandle )
 607             {
 608                 // QT does not correctly export the mask
 609                 // TODO if we get around to it create a synthetic PICT with the CopyBits and Mask commands
 610                 CGImageRef imageRef = CreateCGImage();
 611                 err = GraphicsExportSetInputCGImage( exporter, imageRef );
 612                 err = GraphicsExportSetOutputHandle(exporter, (Handle)m_pictHandle);
 613                 err = GraphicsExportDoExport(exporter, NULL);
 614                 CGImageRelease( imageRef );
 615
 616                 size_t handleSize = GetHandleSize( (Handle) m_pictHandle );
 617                 // the 512 bytes header is only needed for pict files, but not in memory
 618                 if ( handleSize >= 512 )
 619                 {
 620                     memmove( *m_pictHandle , (char*)(*m_pictHandle)+512, handleSize - 512 );
 621                     SetHandleSize( (Handle) m_pictHandle, handleSize - 512 );
 622                 }
 623             }
 624             CloseComponent( exporter );
 625         }
 626 #endif
 627     }
 628
 629     return m_pictHandle ;
 630 }
 631 #endif
 632
 633 CGImageRef wxBitmapRefData::CreateCGImage() const
 634 {
 635     wxASSERT( m_ok ) ;
 636     wxASSERT( m_rawAccessCount >= 0 ) ;
 637     CGImageRef image ;
 638     if ( m_rawAccessCount > 0 || m_cgImageRef == NULL )
 639     {
 640         if ( m_depth != 1 && m_bitmapMask == NULL )
 641         {
 642             if ( m_bitmapMask )
 643             {
 644                 CGImageRef tempImage = CGBitmapContextCreateImage( m_hBitmap );
 645                 CGImageRef tempMask = CGBitmapContextCreateImage((CGContextRef) m_bitmapMask->GetHBITMAP() );
 646                 image = CGImageCreateWithMask( tempImage, tempMask );
 647                 CGImageRelease(tempMask);
 648                 CGImageRelease(tempImage);
 649             }
 650             else
 651                 image = CGBitmapContextCreateImage( m_hBitmap );
 652         }
 653         else
 654         {
 655             size_t imageSize = m_height * m_bytesPerRow ;
 656             void * dataBuffer = m_memBuf.GetData() ;
 657             int w = m_width ;
 658             int h = m_height ;
 659             CGImageAlphaInfo alphaInfo = kCGImageAlphaNoneSkipFirst ;
 660             wxMemoryBuffer membuf;
 661
 662             if ( m_bitmapMask )
 663             {
 664                 alphaInfo = kCGImageAlphaFirst ;
 665                 unsigned char *destalphastart = (unsigned char*) membuf.GetWriteBuf( imageSize ) ;
 666                 memcpy( destalphastart , dataBuffer , imageSize ) ;
 667                 unsigned char *sourcemaskstart = (unsigned char *) m_bitmapMask->GetRawAccess() ;
 668                 int maskrowbytes = m_bitmapMask->GetBytesPerRow() ;
 669                 for ( int y = 0 ; y < h ; ++y , destalphastart += m_bytesPerRow, sourcemaskstart += maskrowbytes)
 670                 {
 671                     unsigned char *sourcemask = sourcemaskstart ;
 672                     unsigned char *destalpha = destalphastart ;
 673                     for ( int x = 0 ; x < w ; ++x , sourcemask += kMaskBytesPerPixel , destalpha += 4 )
 674                     {
 675                         *destalpha = 0xFF - *sourcemask ;
 676                     }
 677                 }
 678                 membuf.UngetWriteBuf( imageSize );
 679             }
 680             else
 681             {
 682                 if ( m_hasAlpha )
 683                 {
 684 #if wxOSX_USE_PREMULTIPLIED_ALPHA
 685                     alphaInfo = kCGImageAlphaPremultipliedFirst ;
 686 #else
 687                     alphaInfo = kCGImageAlphaFirst ;
 688 #endif
 689                 }
 690
 691                 membuf = m_memBuf;
 692             }
 693
 694             CGDataProviderRef dataProvider = NULL ;
 695             if ( m_depth == 1 )
 696             {
 697                 // TODO CHECK ALIGNMENT
 698                 wxMemoryBuffer maskBuf;
 699                 unsigned char * maskBufData = (unsigned char*) maskBuf.GetWriteBuf( m_width * m_height );
 700                 unsigned char * bufData = (unsigned char *) membuf.GetData() ;
 701                 // copy one color component
 702                 size_t i = 0;
 703                 for( int y = 0 ; y < m_height ; bufData+= m_bytesPerRow, ++y )
 704                 {
 705                     unsigned char *bufDataIter = bufData+3;
 706                     for ( int x = 0 ; x < m_width ; bufDataIter += 4, ++x, ++i )
 707                     {
 708                         maskBufData[i] = *bufDataIter;
 709                     }
 710                 }
 711                 maskBuf.UngetWriteBuf( m_width * m_height );
 712
 713                 dataProvider =
 714                     wxMacCGDataProviderCreateWithMemoryBuffer( maskBuf );
 715
 716                 image = ::CGImageMaskCreate( w, h, 8, 8, m_width , dataProvider, NULL, false );
 717             }
 718             else
 719             {
 720                 CGColorSpaceRef colorSpace = wxMacGetGenericRGBColorSpace();
 721                 dataProvider = wxMacCGDataProviderCreateWithMemoryBuffer( membuf );
 722                 image =
 723                     ::CGImageCreate(
 724                                     w, h, 8 , 32 , m_bytesPerRow , colorSpace, alphaInfo ,
 725                                     dataProvider, NULL , false , kCGRenderingIntentDefault );
 726             }
 727             CGDataProviderRelease( dataProvider);
 728         }
 729     }
 730     else
 731     {
 732         image = m_cgImageRef ;
 733         CGImageRetain( image ) ;
 734     }
 735
 736     if ( m_rawAccessCount == 0 && m_cgImageRef == NULL)
 737     {
 738         // we keep it for later use
 739         m_cgImageRef = image ;
 740         CGImageRetain( image ) ;
 741     }
 742
 743     return image ;
 744 }
 745
 746 CGContextRef wxBitmapRefData::GetBitmapContext() const
 747 {
 748     return m_hBitmap;
 749 }
 750
 751 void wxBitmapRefData::Free()
 752 {
 753     wxASSERT_MSG( m_rawAccessCount == 0 , wxT("Bitmap still selected when destroyed") ) ;
 754
 755     if ( m_cgImageRef )
 756     {
 757         CGImageRelease( m_cgImageRef ) ;
 758         m_cgImageRef = NULL ;
 759     }
 760 #ifndef __WXOSX_IPHONE__
 761     if ( m_iconRef )
 762     {
 763         ReleaseIconRef( m_iconRef ) ;
 764         m_iconRef = NULL ;
 765     }
 766
 767 #ifndef __LP64__
 768     if ( m_pictHandle )
 769     {
 770         KillPicture( m_pictHandle ) ;
 771         m_pictHandle = NULL ;
 772     }
 773 #endif
 774 #endif
 775     if ( m_hBitmap )
 776     {
 777         CGContextRelease(m_hBitmap);
 778         m_hBitmap = NULL ;
 779     }
 780
 781     if (m_bitmapMask)
 782     {
 783         delete m_bitmapMask;
 784         m_bitmapMask = NULL;
 785     }
 786 }
 787
 788 wxBitmapRefData::~wxBitmapRefData()
 789 {
 790     Free() ;
 791 }
 792
 793
 794
 795 // ----------------------------------------------------------------------------
 796 // wxBitmap
 797 // ----------------------------------------------------------------------------
 798
 799 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 800 {
 801     bool created = false ;
 802     int w = icon.GetWidth() ;
 803     int h = icon.GetHeight() ;
 804
 805     Create( w , h ) ;
 806 #ifdef __WXOSX_CARBON__
 807     if ( w == h && ( w == 16 || w == 32 || w == 48 || w == 128 ) )
 808     {
 809         IconFamilyHandle iconFamily = NULL ;
 810         Handle imagehandle = NewHandle( 0 ) ;
 811         Handle maskhandle = NewHandle( 0 ) ;
 812
 813         OSType maskType = 0;
 814         OSType dataType = 0;
 815         IconSelectorValue selector = 0 ;
 816
 817         switch (w)
 818         {
 819             case 128:
 820                 dataType = kThumbnail32BitData ;
 821                 maskType = kThumbnail8BitMask ;
 822                 selector = kSelectorAllAvailableData ;
 823                 break;
 824
 825             case 48:
 826                 dataType = kHuge32BitData ;
 827                 maskType = kHuge8BitMask ;
 828                 selector = kSelectorHuge32Bit | kSelectorHuge8BitMask ;
 829                 break;
 830
 831             case 32:
 832                 dataType = kLarge32BitData ;
 833                 maskType = kLarge8BitMask ;
 834                 selector = kSelectorLarge32Bit | kSelectorLarge8BitMask ;
 835                 break;
 836
 837             case 16:
 838                 dataType = kSmall32BitData ;
 839                 maskType = kSmall8BitMask ;
 840                 selector = kSelectorSmall32Bit | kSelectorSmall8BitMask ;
 841                 break;
 842
 843             default:
 844                 break;
 845         }
 846
 847         OSStatus err = IconRefToIconFamily( MAC_WXHICON(icon.GetHICON()) , selector , &iconFamily ) ;
 848
 849         err = GetIconFamilyData( iconFamily , dataType , imagehandle ) ;
 850         err = GetIconFamilyData( iconFamily , maskType , maskhandle ) ;
 851         size_t imagehandlesize = GetHandleSize( imagehandle ) ;
 852         size_t maskhandlesize = GetHandleSize( maskhandle ) ;
 853
 854         if ( imagehandlesize != 0 && maskhandlesize != 0 )
 855         {
 856             wxASSERT( GetHandleSize( imagehandle ) == w * 4 * h ) ;
 857             wxASSERT( GetHandleSize( maskhandle ) == w * h ) ;
 858
 859             UseAlpha() ;
 860
 861             unsigned char *source = (unsigned char *) *imagehandle ;
 862             unsigned char *sourcemask = (unsigned char *) *maskhandle ;
 863             unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 864
 865             for ( int y = 0 ; y < h ; ++y )
 866             {
 867                 for ( int x = 0 ; x < w ; ++x )
 868                 {
 869                     unsigned char a = *sourcemask++;
 870                     *destination++ = a;
 871                     source++ ;
 872 #if wxOSX_USE_PREMULTIPLIED_ALPHA
 873                     *destination++ = ( (*source++) * a + 127 ) / 255;
 874                     *destination++ = ( (*source++) * a + 127 ) / 255;
 875                     *destination++ = ( (*source++) * a + 127 ) / 255;
 876 #else
 877                     *destination++ = *source++ ;
 878                     *destination++ = *source++ ;
 879                     *destination++ = *source++ ;
 880 #endif
 881                 }
 882             }
 883
 884             EndRawAccess() ;
 885             DisposeHandle( imagehandle ) ;
 886             DisposeHandle( maskhandle ) ;
 887             created = true ;
 888         }
 889
 890         DisposeHandle( (Handle) iconFamily ) ;
 891     }
 892 #endif
 893     if ( !created )
 894     {
 895         wxMemoryDC dc ;
 896         dc.SelectObject( *this ) ;
 897         dc.DrawIcon( icon , 0 , 0 ) ;
 898         dc.SelectObject( wxNullBitmap ) ;
 899     }
 900
 901     return true;
 902 }
 903
 904 wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
 905 {
 906     wxBitmapRefData* bitmapRefData;
 907
 908     m_refData = bitmapRefData = new wxBitmapRefData( the_width , the_height , no_bits ) ;
 909
 910     if (bitmapRefData->IsOk())
 911     {
 912         if ( no_bits == 1 )
 913         {
 914             int linesize = ( the_width / (sizeof(unsigned char) * 8)) ;
 915             if ( the_width % (sizeof(unsigned char) * 8) )
 916                 linesize += sizeof(unsigned char);
 917
 918             unsigned char* linestart = (unsigned char*) bits ;
 919             unsigned char* destptr = (unsigned char*) BeginRawAccess() ;
 920
 921             for ( int y = 0 ; y < the_height ; ++y , linestart += linesize, destptr += M_BITMAPDATA->GetBytesPerRow() )
 922             {
 923                 unsigned char* destination = destptr;
 924                 int index, bit, mask;
 925
 926                 for ( int x = 0 ; x < the_width ; ++x )
 927                 {
 928                     index = x / 8 ;
 929                     bit = x % 8 ;
 930                     mask = 1 << bit ;
 931
 932                     if ( linestart[index] & mask )
 933                     {
 934                         *destination++ = 0xFF ;
 935                         *destination++ = 0 ;
 936                         *destination++ = 0 ;
 937                         *destination++ = 0 ;
 938                     }
 939                     else
 940                     {
 941                         *destination++ = 0xFF ;
 942                         *destination++ = 0xFF ;
 943                         *destination++ = 0xFF ;
 944                         *destination++ = 0xFF ;
 945                     }
 946                 }
 947             }
 948
 949             EndRawAccess() ;
 950         }
 951         else
 952         {
 953             wxFAIL_MSG(wxT("multicolor BITMAPs not yet implemented"));
 954         }
 955     } /* bitmapRefData->IsOk() */
 956 }
 957
 958 wxBitmap::wxBitmap(const void* data, wxBitmapType type, int width, int height, int depth)
 959 {
 960     (void) Create(data, type, width, height, depth);
 961 }
 962
 963 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
 964 {
 965     LoadFile(filename, type);
 966 }
 967
 968 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 969 {
 970     return new wxBitmapRefData;
 971 }
 972
 973 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 974 {
 975     return new wxBitmapRefData(*static_cast<const wxBitmapRefData *>(data));
 976 }
 977
 978 void * wxBitmap::GetRawAccess() const
 979 {
 980     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 981
 982     return M_BITMAPDATA->GetRawAccess() ;
 983 }
 984
 985 void * wxBitmap::BeginRawAccess()
 986 {
 987     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 988
 989     return M_BITMAPDATA->BeginRawAccess() ;
 990 }
 991
 992 void wxBitmap::EndRawAccess()
 993 {
 994     wxCHECK_RET( Ok() , wxT("invalid bitmap") ) ;
 995
 996     M_BITMAPDATA->EndRawAccess() ;
 997 }
 998
 999 CGImageRef wxBitmap::CreateCGImage() const
1000 {
1001     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
1002
1003     return M_BITMAPDATA->CreateCGImage() ;
1004 }
1005
1006 #ifndef  __WXOSX_IPHONE__
1007 IconRef wxBitmap::GetIconRef() const
1008 {
1009     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
1010
1011     return M_BITMAPDATA->GetIconRef() ;
1012 }
1013
1014 IconRef wxBitmap::CreateIconRef() const
1015 {
1016     IconRef icon = GetIconRef();
1017     verify_noerr( AcquireIconRef(icon) );
1018     return icon;
1019 }
1020 #endif
1021
1022 #if wxOSX_USE_COCOA
1023
1024 WX_NSImage wxBitmap::GetNSImage() const
1025 {
1026     wxCFRef< CGImageRef > cgimage(CreateCGImage());
1027     return wxOSXCreateNSImageFromCGImage( cgimage );
1028 }
1029
1030 #endif
1031
1032 #if wxOSX_USE_IPHONE
1033
1034 WX_UIImage wxBitmap::GetUIImage() const
1035 {
1036     wxCFRef< CGImageRef > cgimage(CreateCGImage());
1037     return wxOSXCreateUIImageFromCGImage( cgimage );
1038 }
1039
1040 #endif
1041 wxBitmap wxBitmap::GetSubBitmap(const wxRect &rect) const
1042 {
1043     wxCHECK_MSG( Ok() &&
1044                 (rect.x >= 0) && (rect.y >= 0) &&
1045                 (rect.x+rect.width <= GetWidth()) &&
1046                 (rect.y+rect.height <= GetHeight()),
1047                 wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1048
1049     wxBitmap ret( rect.width, rect.height, GetDepth() );
1050     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1051
1052     int destwidth = rect.width ;
1053     int destheight = rect.height ;
1054
1055     {
1056         unsigned char *sourcedata = (unsigned char*) GetRawAccess() ;
1057         unsigned char *destdata = (unsigned char*) ret.BeginRawAccess() ;
1058         wxASSERT( (sourcedata != NULL) && (destdata != NULL) ) ;
1059
1060         int sourcelinesize = GetBitmapData()->GetBytesPerRow() ;
1061         int destlinesize = ret.GetBitmapData()->GetBytesPerRow() ;
1062         unsigned char *source = sourcedata + rect.x * 4 + rect.y * sourcelinesize ;
1063         unsigned char *dest = destdata ;
1064
1065         for (int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
1066         {
1067             memcpy( dest , source , destlinesize ) ;
1068         }
1069     }
1070
1071     ret.EndRawAccess() ;
1072
1073     if ( M_BITMAPDATA->m_bitmapMask )
1074     {
1075         wxMemoryBuffer maskbuf ;
1076         int rowBytes = GetBestBytesPerRow( destwidth * kMaskBytesPerPixel );
1077         size_t maskbufsize = rowBytes * destheight ;
1078
1079         int sourcelinesize = M_BITMAPDATA->m_bitmapMask->GetBytesPerRow() ;
1080         int destlinesize = rowBytes ;
1081
1082         unsigned char *source = (unsigned char *) M_BITMAPDATA->m_bitmapMask->GetRawAccess() ;
1083         unsigned char *destdata = (unsigned char * ) maskbuf.GetWriteBuf( maskbufsize ) ;
1084         wxASSERT( (source != NULL) && (destdata != NULL) ) ;
1085
1086         source += rect.x * kMaskBytesPerPixel + rect.y * sourcelinesize ;
1087         unsigned char *dest = destdata ;
1088
1089         for (int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
1090         {
1091             memcpy( dest , source , destlinesize ) ;
1092         }
1093
1094         maskbuf.UngetWriteBuf( maskbufsize ) ;
1095         ret.SetMask( new wxMask( maskbuf , destwidth , destheight , rowBytes ) ) ;
1096     }
1097     else if ( HasAlpha() )
1098         ret.UseAlpha() ;
1099
1100     return ret;
1101 }
1102
1103 bool wxBitmap::Create(int w, int h, int d)
1104 {
1105     UnRef();
1106
1107     if ( d < 0 )
1108         d = wxDisplayDepth() ;
1109
1110     m_refData = new wxBitmapRefData( w , h , d );
1111
1112     return M_BITMAPDATA->IsOk() ;
1113 }
1114
1115 bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
1116 {
1117     UnRef();
1118
1119     wxBitmapHandler *handler = FindHandler(type);
1120
1121     if ( handler )
1122     {
1123         m_refData = new wxBitmapRefData;
1124
1125         return handler->LoadFile(this, filename, type, -1, -1);
1126     }
1127     else
1128     {
1129 #if wxUSE_IMAGE
1130         wxImage loadimage(filename, type);
1131         if (loadimage.Ok())
1132         {
1133             *this = loadimage;
1134
1135             return true;
1136         }
1137 #endif
1138     }
1139
1140     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1141
1142     return false;
1143 }
1144
1145 bool wxBitmap::Create(const void* data, wxBitmapType type, int width, int height, int depth)
1146 {
1147     UnRef();
1148
1149     m_refData = new wxBitmapRefData;
1150
1151     wxBitmapHandler *handler = FindHandler(type);
1152
1153     if ( handler == NULL )
1154     {
1155         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1156
1157         return false;
1158     }
1159
1160     return handler->Create(this, data, type, width, height, depth);
1161 }
1162
1163 #if wxUSE_IMAGE
1164
1165 wxBitmap::wxBitmap(const wxImage& image, int depth)
1166 {
1167     wxCHECK_RET( image.Ok(), wxT("invalid image") );
1168
1169     // width and height of the device-dependent bitmap
1170     int width = image.GetWidth();
1171     int height = image.GetHeight();
1172
1173     wxBitmapRefData* bitmapRefData;
1174
1175     m_refData = bitmapRefData = new wxBitmapRefData( width , height , depth ) ;
1176
1177     if ( bitmapRefData->IsOk())
1178     {
1179         // Create picture
1180
1181         bool hasAlpha = false ;
1182
1183         if ( image.HasMask() )
1184         {
1185             // takes precedence, don't mix with alpha info
1186         }
1187         else
1188         {
1189             hasAlpha = image.HasAlpha() ;
1190         }
1191
1192         if ( hasAlpha )
1193             UseAlpha() ;
1194
1195         unsigned char* destinationstart = (unsigned char*) BeginRawAccess() ;
1196         register unsigned char* data = image.GetData();
1197         if ( destinationstart != NULL && data != NULL )
1198         {
1199             const unsigned char *alpha = hasAlpha ? image.GetAlpha() : NULL ;
1200             for (int y = 0; y < height; destinationstart += M_BITMAPDATA->GetBytesPerRow(), y++)
1201             {
1202                 unsigned char * destination = destinationstart;
1203                 for (int x = 0; x < width; x++)
1204                 {
1205                     if ( hasAlpha )
1206                     {
1207                         const unsigned char a = *alpha++;
1208                         *destination++ = a ;
1209
1210     #if wxOSX_USE_PREMULTIPLIED_ALPHA
1211                         *destination++ = ((*data++) * a + 127) / 255 ;
1212                         *destination++ = ((*data++) * a + 127) / 255 ;
1213                         *destination++ = ((*data++) * a + 127) / 255 ;
1214     #else
1215                         *destination++ = *data++ ;
1216                         *destination++ = *data++ ;
1217                         *destination++ = *data++ ;
1218     #endif
1219                     }
1220                     else
1221                     {
1222                         *destination++ = 0xFF ;
1223                         *destination++ = *data++ ;
1224                         *destination++ = *data++ ;
1225                         *destination++ = *data++ ;
1226                     }
1227                 }
1228             }
1229
1230             EndRawAccess() ;
1231         }
1232         if ( image.HasMask() )
1233             SetMask( new wxMask( *this , wxColour( image.GetMaskRed() , image.GetMaskGreen() , image.GetMaskBlue() ) ) ) ;
1234     } /* bitmapRefData->IsOk() */
1235 }
1236
1237 wxImage wxBitmap::ConvertToImage() const
1238 {
1239     wxImage image;
1240
1241     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
1242
1243     // create an wxImage object
1244     int width = GetWidth();
1245     int height = GetHeight();
1246     image.Create( width, height );
1247
1248     unsigned char *data = image.GetData();
1249     wxCHECK_MSG( data, wxNullImage, wxT("Could not allocate data for image") );
1250
1251     unsigned char* sourcestart = (unsigned char*) GetRawAccess() ;
1252
1253     bool hasAlpha = false ;
1254     bool hasMask = false ;
1255     int maskBytesPerRow = 0 ;
1256     unsigned char *alpha = NULL ;
1257     unsigned char *mask = NULL ;
1258
1259     if ( HasAlpha() )
1260         hasAlpha = true ;
1261
1262     if ( GetMask() )
1263     {
1264         hasMask = true ;
1265         mask = (unsigned char*) GetMask()->GetRawAccess() ;
1266         maskBytesPerRow = GetMask()->GetBytesPerRow() ;
1267     }
1268
1269     if ( hasAlpha )
1270     {
1271         image.SetAlpha() ;
1272         alpha = image.GetAlpha() ;
1273     }
1274
1275     int index = 0;
1276
1277     // The following masking algorithm is the same as well in msw/gtk:
1278     // the colour used as transparent one in wxImage and the one it is
1279     // replaced with when it actually occurs in the bitmap
1280     static const int MASK_RED = 1;
1281     static const int MASK_GREEN = 2;
1282     static const int MASK_BLUE = 3;
1283     static const int MASK_BLUE_REPLACEMENT = 2;
1284
1285     for (int yy = 0; yy < height; yy++ , sourcestart += M_BITMAPDATA->GetBytesPerRow() , mask += maskBytesPerRow )
1286     {
1287         unsigned char * maskp = mask ;
1288         unsigned char * source = sourcestart;
1289         unsigned char a, r, g, b;
1290         long color;
1291
1292         for (int xx = 0; xx < width; xx++)
1293         {
1294             color = *((long*) source) ;
1295 #ifdef WORDS_BIGENDIAN
1296             a = ((color&0xFF000000) >> 24) ;
1297             r = ((color&0x00FF0000) >> 16) ;
1298             g = ((color&0x0000FF00) >> 8) ;
1299             b = (color&0x000000FF);
1300 #else
1301             b = ((color&0xFF000000) >> 24) ;
1302             g = ((color&0x00FF0000) >> 16) ;
1303             r = ((color&0x0000FF00) >> 8) ;
1304             a = (color&0x000000FF);
1305 #endif
1306             if ( hasMask )
1307             {
1308                 if ( *maskp++ == 0xFF )
1309                 {
1310                     r = MASK_RED ;
1311                     g = MASK_GREEN ;
1312                     b = MASK_BLUE ;
1313                 }
1314                 else if ( r == MASK_RED && g == MASK_GREEN && b == MASK_BLUE )
1315                     b = MASK_BLUE_REPLACEMENT ;
1316             }
1317             else if ( hasAlpha )
1318             {
1319                 *alpha++ = a ;
1320 #if wxOSX_USE_PREMULTIPLIED_ALPHA
1321                 // this must be non-premultiplied data
1322                 if ( a != 0xFF && a!= 0 )
1323                 {
1324                     r = r * 255 / a;
1325                     g = g * 255 / a;
1326                     b = b * 255 / a;
1327                 }
1328 #endif
1329             }
1330
1331             data[index    ] = r ;
1332             data[index + 1] = g ;
1333             data[index + 2] = b ;
1334
1335             index += 3;
1336             source += 4 ;
1337         }
1338     }
1339
1340     if ( hasMask )
1341         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1342
1343     return image;
1344 }
1345
1346 #endif //wxUSE_IMAGE
1347
1348 bool wxBitmap::SaveFile( const wxString& filename,
1349     wxBitmapType type, const wxPalette *palette ) const
1350 {
1351     bool success = false;
1352     wxBitmapHandler *handler = FindHandler(type);
1353
1354     if ( handler )
1355     {
1356         success = handler->SaveFile(this, filename, type, palette);
1357     }
1358     else
1359     {
1360 #if wxUSE_IMAGE
1361         wxImage image = ConvertToImage();
1362         success = image.SaveFile(filename, type);
1363 #else
1364         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1365 #endif
1366     }
1367
1368     return success;
1369 }
1370
1371 int wxBitmap::GetHeight() const
1372 {
1373    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1374
1375    return M_BITMAPDATA->GetHeight();
1376 }
1377
1378 int wxBitmap::GetWidth() const
1379 {
1380    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1381
1382    return M_BITMAPDATA->GetWidth() ;
1383 }
1384
1385 int wxBitmap::GetDepth() const
1386 {
1387    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1388
1389    return M_BITMAPDATA->GetDepth();
1390 }
1391
1392 wxMask *wxBitmap::GetMask() const
1393 {
1394    wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
1395
1396    return M_BITMAPDATA->m_bitmapMask;
1397 }
1398
1399 bool wxBitmap::HasAlpha() const
1400 {
1401    wxCHECK_MSG( Ok(), false , wxT("invalid bitmap") );
1402
1403    return M_BITMAPDATA->HasAlpha() ;
1404 }
1405
1406 void wxBitmap::SetWidth(int w)
1407 {
1408     AllocExclusive();
1409     M_BITMAPDATA->SetWidth(w);
1410 }
1411
1412 void wxBitmap::SetHeight(int h)
1413 {
1414     AllocExclusive();
1415     M_BITMAPDATA->SetHeight(h);
1416 }
1417
1418 void wxBitmap::SetDepth(int d)
1419 {
1420     AllocExclusive();
1421     M_BITMAPDATA->SetDepth(d);
1422 }
1423
1424 void wxBitmap::SetOk(bool isOk)
1425 {
1426     AllocExclusive();
1427     M_BITMAPDATA->SetOk(isOk);
1428 }
1429
1430 #if wxUSE_PALETTE
1431 wxPalette *wxBitmap::GetPalette() const
1432 {
1433    wxCHECK_MSG( Ok(), NULL, wxT("Invalid bitmap  GetPalette()") );
1434
1435    return &M_BITMAPDATA->m_bitmapPalette;
1436 }
1437
1438 void wxBitmap::SetPalette(const wxPalette& palette)
1439 {
1440     AllocExclusive();
1441     M_BITMAPDATA->m_bitmapPalette = palette ;
1442 }
1443 #endif // wxUSE_PALETTE
1444
1445 void wxBitmap::SetMask(wxMask *mask)
1446 {
1447     AllocExclusive();
1448     // Remove existing mask if there is one.
1449     delete M_BITMAPDATA->m_bitmapMask;
1450
1451     M_BITMAPDATA->m_bitmapMask = mask ;
1452 }
1453
1454 WXHBITMAP wxBitmap::GetHBITMAP(WXHBITMAP* mask) const
1455 {
1456     wxUnusedVar(mask);
1457
1458     return WXHBITMAP(M_BITMAPDATA->GetBitmapContext());
1459 }
1460
1461 // ----------------------------------------------------------------------------
1462 // wxMask
1463 // ----------------------------------------------------------------------------
1464
1465 wxMask::wxMask()
1466 {
1467     Init() ;
1468 }
1469
1470 wxMask::wxMask(const wxMask &tocopy)
1471 {
1472     Init();
1473
1474     m_bytesPerRow = tocopy.m_bytesPerRow;
1475     m_width = tocopy.m_width;
1476     m_height = tocopy.m_height;
1477
1478     size_t size = m_bytesPerRow * m_height;
1479     unsigned char* dest = (unsigned char*)m_memBuf.GetWriteBuf( size );
1480     unsigned char* source = (unsigned char*)tocopy.m_memBuf.GetData();
1481     memcpy( dest, source, size );
1482     m_memBuf.UngetWriteBuf( size ) ;
1483     RealizeNative() ;
1484 }
1485
1486 // Construct a mask from a bitmap and a colour indicating
1487 // the transparent area
1488 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
1489 {
1490     Init() ;
1491     Create( bitmap, colour );
1492 }
1493
1494 // Construct a mask from a mono bitmap (copies the bitmap).
1495 wxMask::wxMask( const wxBitmap& bitmap )
1496 {
1497     Init() ;
1498     Create( bitmap );
1499 }
1500
1501 // Construct a mask from a mono bitmap (copies the bitmap).
1502
1503 wxMask::wxMask( const wxMemoryBuffer& data, int width , int height , int bytesPerRow )
1504 {
1505     Init() ;
1506     Create( data, width , height , bytesPerRow );
1507 }
1508
1509 wxMask::~wxMask()
1510 {
1511     if ( m_maskBitmap )
1512     {
1513         CGContextRelease( (CGContextRef) m_maskBitmap );
1514         m_maskBitmap = NULL ;
1515     }
1516 }
1517
1518 void wxMask::Init()
1519 {
1520     m_width = m_height = m_bytesPerRow = 0 ;
1521     m_maskBitmap = NULL ;
1522 }
1523
1524 void *wxMask::GetRawAccess() const
1525 {
1526     return m_memBuf.GetData() ;
1527 }
1528
1529 // The default ColorTable for k8IndexedGrayPixelFormat in Intel appears to be broken, so we'll use an non-indexed
1530 // bitmap mask instead; in order to keep the code simple, the change applies to PowerPC implementations as well
1531
1532 void wxMask::RealizeNative()
1533 {
1534     if ( m_maskBitmap )
1535     {
1536         CGContextRelease( (CGContextRef) m_maskBitmap );
1537        m_maskBitmap = NULL ;
1538     }
1539
1540     CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceGray();
1541     // from MouseTracking sample :
1542     // Ironically, due to a bug in CGImageCreateWithMask, you cannot use
1543     // CGColorSpaceCreateWithName(kCGColorSpaceGenericGray) at this point!
1544
1545     m_maskBitmap = CGBitmapContextCreate((char*) m_memBuf.GetData(), m_width, m_height, 8, m_bytesPerRow, colorspace,
1546         kCGImageAlphaNone );
1547     CGColorSpaceRelease( colorspace );
1548     wxASSERT_MSG( m_maskBitmap , wxT("Unable to create CGBitmapContext context") ) ;
1549 }
1550
1551 // Create a mask from a mono bitmap (copies the bitmap).
1552
1553 bool wxMask::Create(const wxMemoryBuffer& data,int width , int height , int bytesPerRow)
1554 {
1555     m_memBuf = data ;
1556     m_width = width ;
1557     m_height = height ;
1558     m_bytesPerRow = bytesPerRow ;
1559
1560     wxASSERT( data.GetDataLen() == (size_t)(height * bytesPerRow) ) ;
1561
1562     RealizeNative() ;
1563
1564     return true ;
1565 }
1566
1567 // Create a mask from a mono bitmap (copies the bitmap).
1568 bool wxMask::Create(const wxBitmap& bitmap)
1569 {
1570     m_width = bitmap.GetWidth() ;
1571     m_height = bitmap.GetHeight() ;
1572     m_bytesPerRow = GetBestBytesPerRow( m_width * kMaskBytesPerPixel ) ;
1573
1574     size_t size = m_bytesPerRow * m_height ;
1575     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1576     wxASSERT( destdatabase != NULL ) ;
1577
1578     memset( destdatabase , 0 , size ) ;
1579     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1580
1581     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow )
1582     {
1583         unsigned char *destdata = destdatabase ;
1584         unsigned char r, g, b;
1585
1586         for ( int x = 0 ; x < m_width ; ++x )
1587         {
1588             srcdata++ ;
1589             r = *srcdata++ ;
1590             g = *srcdata++ ;
1591             b = *srcdata++ ;
1592
1593             if ( ( r + g + b ) > 0x10 )
1594                 *destdata++ = 0xFF ;
1595             else
1596                 *destdata++ = 0x00 ;
1597         }
1598     }
1599
1600     m_memBuf.UngetWriteBuf( size ) ;
1601     RealizeNative() ;
1602
1603     return true;
1604 }
1605
1606 // Create a mask from a bitmap and a colour indicating
1607 // the transparent area
1608 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1609 {
1610     m_width = bitmap.GetWidth() ;
1611     m_height = bitmap.GetHeight() ;
1612     m_bytesPerRow = GetBestBytesPerRow( m_width * kMaskBytesPerPixel ) ;
1613
1614     size_t size = m_bytesPerRow * m_height ;
1615     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1616     wxASSERT( destdatabase != NULL ) ;
1617
1618     memset( destdatabase , 0 , size ) ;
1619     unsigned char * srcdatabase = (unsigned char*) bitmap.GetRawAccess() ;
1620     size_t sourceBytesRow = bitmap.GetBitmapData()->GetBytesPerRow();
1621
1622     for ( int y = 0 ; y < m_height ; ++y , srcdatabase+= sourceBytesRow, destdatabase += m_bytesPerRow)
1623     {
1624         unsigned char *srcdata = srcdatabase ;
1625         unsigned char *destdata = destdatabase ;
1626         unsigned char r, g, b;
1627
1628         for ( int x = 0 ; x < m_width ; ++x )
1629         {
1630             srcdata++ ;
1631             r = *srcdata++ ;
1632             g = *srcdata++ ;
1633             b = *srcdata++ ;
1634
1635             if ( colour == wxColour( r , g , b ) )
1636                 *destdata++ = 0xFF ;
1637             else
1638                 *destdata++ = 0x00 ;
1639         }
1640     }
1641
1642     m_memBuf.UngetWriteBuf( size ) ;
1643     RealizeNative() ;
1644
1645     return true;
1646 }
1647
1648 WXHBITMAP wxMask::GetHBITMAP() const
1649 {
1650     return m_maskBitmap ;
1651 }
1652
1653 // ----------------------------------------------------------------------------
1654 // Standard Handlers
1655 // ----------------------------------------------------------------------------
1656
1657 #if !defined( __LP64__ ) && !defined(__WXOSX_IPHONE__)
1658
1659 class WXDLLEXPORT wxPICTResourceHandler: public wxBitmapHandler
1660 {
1661     DECLARE_DYNAMIC_CLASS(wxPICTResourceHandler)
1662
1663 public:
1664     inline wxPICTResourceHandler()
1665     {
1666         SetName(wxT("Macintosh Pict resource"));
1667         SetExtension(wxEmptyString);
1668         SetType(wxBITMAP_TYPE_PICT_RESOURCE);
1669     };
1670
1671     virtual bool LoadFile(wxBitmap *bitmap,
1672                           const wxString& name,
1673                           wxBitmapType type,
1674                           int desiredWidth,
1675                           int desiredHeight);
1676 };
1677
1678 IMPLEMENT_DYNAMIC_CLASS(wxPICTResourceHandler, wxBitmapHandler)
1679
1680
1681 bool wxPICTResourceHandler::LoadFile(wxBitmap *bitmap,
1682                                      const wxString& name,
1683                                      wxBitmapType WXUNUSED(type),
1684                                      int WXUNUSED(desiredWidth),
1685                                      int WXUNUSED(desiredHeight))
1686 {
1687 #if wxUSE_METAFILE
1688     Str255 theName ;
1689     wxMacStringToPascal( name , theName ) ;
1690
1691     PicHandle thePict = (PicHandle ) GetNamedResource( 'PICT' , theName ) ;
1692     if ( thePict )
1693     {
1694         wxMetafile mf ;
1695
1696         mf.SetPICT( thePict ) ;
1697         bitmap->Create( mf.GetWidth() , mf.GetHeight() ) ;
1698         wxMemoryDC dc ;
1699         dc.SelectObject( *bitmap ) ;
1700         mf.Play( &dc ) ;
1701         dc.SelectObject( wxNullBitmap ) ;
1702
1703         return true ;
1704     }
1705 #endif
1706
1707     return false ;
1708 }
1709 #endif
1710
1711 void wxBitmap::InitStandardHandlers()
1712 {
1713 #if !defined( __LP64__ ) && !defined(__WXOSX_IPHONE__)
1714     AddHandler( new wxPICTResourceHandler ) ;
1715 #endif
1716 #if wxOSX_USE_CARBON
1717     AddHandler( new wxICONResourceHandler ) ;
1718 #endif
1719 }
1720
1721 // ----------------------------------------------------------------------------
1722 // raw bitmap access support
1723 // ----------------------------------------------------------------------------
1724
1725 void *wxBitmap::GetRawData(wxPixelDataBase& data, int WXUNUSED(bpp))
1726 {
1727     if ( !Ok() )
1728         // no bitmap, no data (raw or otherwise)
1729         return NULL;
1730
1731     data.m_width = GetWidth() ;
1732     data.m_height = GetHeight() ;
1733     data.m_stride = GetBitmapData()->GetBytesPerRow() ;
1734
1735     return BeginRawAccess() ;
1736 }
1737
1738 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(dataBase))
1739 {
1740     EndRawAccess() ;
1741 }
1742
1743 void wxBitmap::UseAlpha()
1744 {
1745     // remember that we are using alpha channel:
1746     // we'll need to create a proper mask in UngetRawData()
1747     M_BITMAPDATA->UseAlpha( true );
1748 }