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(CGImageRef image);
  61     wxBitmapRefData();
  62     wxBitmapRefData(const wxBitmapRefData &tocopy);
  63
  64     virtual ~wxBitmapRefData();
  65
  66     virtual bool IsOk() const { return m_ok; }
  67
  68     void Free();
  69     void SetOk( bool isOk) { m_ok = isOk; }
  70
  71     void SetWidth( int width ) { m_width = width; }
  72     void SetHeight( int height ) { m_height = height; }
  73     void SetDepth( int depth ) { m_depth = depth; }
  74
  75     int GetWidth() const { return m_width; }
  76     int GetHeight() const { return m_height; }
  77     int GetDepth() const { return m_depth; }
  78
  79     void *GetRawAccess() const;
  80     void *BeginRawAccess();
  81     void EndRawAccess();
  82
  83     bool HasAlpha() const { return m_hasAlpha; }
  84     void UseAlpha( bool useAlpha );
  85
  86 public:
  87 #if wxUSE_PALETTE
  88     wxPalette     m_bitmapPalette;
  89 #endif // wxUSE_PALETTE
  90
  91     wxMask *      m_bitmapMask; // Optional mask
  92     CGImageRef    CreateCGImage() const;
  93
  94     // returns true if the bitmap has a size that
  95     // can be natively transferred into a true icon
  96     // if no is returned GetIconRef will still produce
  97     // an icon but it will be generated via a PICT and
  98     // rescaled to 16 x 16
  99     bool          HasNativeSize();
 100
 101     // caller should increase ref count if needed longer
 102     // than the bitmap exists
 103     IconRef       GetIconRef();
 104
 105 #ifndef __WXOSX_IPHONE__
 106     // returns a Pict from the bitmap content
 107     PicHandle     GetPictHandle();
 108 #endif
 109
 110     CGContextRef  GetBitmapContext() const;
 111
 112     int           GetBytesPerRow() const { return m_bytesPerRow; }
 113     private :
 114     bool Create(int width , int height , int depth);
 115     bool Create( CGImageRef image );
 116     void Init();
 117
 118     int           m_width;
 119     int           m_height;
 120     int           m_bytesPerRow;
 121     int           m_depth;
 122     bool          m_hasAlpha;
 123     wxMemoryBuffer m_memBuf;
 124     int           m_rawAccessCount;
 125     bool          m_ok;
 126     mutable CGImageRef    m_cgImageRef;
 127
 128     IconRef       m_iconRef;
 129 #ifndef __WXOSX_IPHONE__
 130     PicHandle     m_pictHandle;
 131 #endif
 132     CGContextRef  m_hBitmap;
 133 };
 134
 135
 136 #define wxOSX_USE_PREMULTIPLIED_ALPHA 1
 137 static const int kBestByteAlignement = 16;
 138 static const int kMaskBytesPerPixel = 1;
 139
 140 static int GetBestBytesPerRow( int rawBytes )
 141 {
 142     return (((rawBytes)+kBestByteAlignement-1) & ~(kBestByteAlignement-1) );
 143 }
 144
 145 #if wxUSE_GUI && !defined(__WXOSX_IPHONE__)
 146
 147 // this is used for more controls than just the wxBitmap button, also for notebooks etc
 148
 149 void wxMacCreateBitmapButton( ControlButtonContentInfo*info , const wxBitmap& bitmap , int forceType )
 150 {
 151     memset( info , 0 , sizeof(ControlButtonContentInfo) ) ;
 152     if ( bitmap.IsOk() )
 153     {
 154         wxBitmapRefData * bmap = bitmap.GetBitmapData() ;
 155         if ( bmap == NULL )
 156             return ;
 157
 158         if ( forceType == 0  )
 159         {
 160             forceType = kControlContentCGImageRef;
 161         }
 162
 163         if ( forceType == kControlContentIconRef )
 164         {
 165             wxBitmap scaleBmp ;
 166             wxBitmapRefData* bmp = bmap ;
 167
 168             if ( !bmap->HasNativeSize() )
 169             {
 170                 // as PICT conversion will only result in a 16x16 icon, let's attempt
 171                 // a few scales for better results
 172
 173                 int w = bitmap.GetWidth() ;
 174                 int h = bitmap.GetHeight() ;
 175                 int sz = wxMax( w , h ) ;
 176                 if ( sz == 24 || sz == 64 )
 177                 {
 178                     scaleBmp = wxBitmap( bitmap.ConvertToImage().Scale( w * 2 , h * 2 ) ) ;
 179                     bmp = scaleBmp.GetBitmapData() ;
 180                 }
 181             }
 182
 183             info->contentType = kControlContentIconRef ;
 184             info->u.iconRef = bmp->GetIconRef() ;
 185             AcquireIconRef( info->u.iconRef ) ;
 186         }
 187         else if ( forceType == kControlContentCGImageRef )
 188         {
 189             info->contentType = kControlContentCGImageRef ;
 190             info->u.imageRef = (CGImageRef) bmap->CreateCGImage() ;
 191         }
 192         else
 193         {
 194 #ifndef __LP64__
 195             info->contentType = kControlContentPictHandle ;
 196             info->u.picture = bmap->GetPictHandle() ;
 197 #endif
 198         }
 199     }
 200 }
 201
 202 CGImageRef wxMacCreateCGImageFromBitmap( const wxBitmap& bitmap )
 203 {
 204     wxBitmapRefData * bmap = bitmap.GetBitmapData() ;
 205     if ( bmap == NULL )
 206         return NULL ;
 207     return (CGImageRef) bmap->CreateCGImage();
 208 }
 209
 210 void wxMacReleaseBitmapButton( ControlButtonContentInfo*info )
 211 {
 212     if ( info->contentType == kControlContentIconRef )
 213     {
 214         ReleaseIconRef( info->u.iconRef ) ;
 215     }
 216     else if ( info->contentType == kControlNoContent )
 217     {
 218         // there's no bitmap at all, fall through silently
 219     }
 220     else if ( info->contentType == kControlContentPictHandle )
 221     {
 222         // owned by the bitmap, no release here
 223     }
 224     else if ( info->contentType == kControlContentCGImageRef )
 225     {
 226         CGImageRelease( info->u.imageRef ) ;
 227     }
 228     else
 229     {
 230         wxFAIL_MSG(wxT("Unexpected bitmap type") ) ;
 231     }
 232 }
 233
 234 #endif //wxUSE_BMPBUTTON
 235
 236 #define M_BITMAPDATA ((wxBitmapRefData *)m_refData)
 237
 238 void wxBitmapRefData::Init()
 239 {
 240     m_width = 0 ;
 241     m_height = 0 ;
 242     m_depth = 0 ;
 243     m_bytesPerRow = 0;
 244     m_ok = false ;
 245     m_bitmapMask = NULL ;
 246     m_cgImageRef = NULL ;
 247
 248 #ifndef __WXOSX_IPHONE__
 249     m_iconRef = NULL ;
 250     m_pictHandle = NULL ;
 251 #endif
 252     m_hBitmap = NULL ;
 253
 254     m_rawAccessCount = 0 ;
 255     m_hasAlpha = false;
 256 }
 257
 258 wxBitmapRefData::wxBitmapRefData(const wxBitmapRefData &tocopy) : wxGDIRefData()
 259 {
 260     Init();
 261     Create(tocopy.m_width, tocopy.m_height, tocopy.m_depth);
 262
 263     if (tocopy.m_bitmapMask)
 264         m_bitmapMask = new wxMask(*tocopy.m_bitmapMask);
 265     else if (tocopy.m_hasAlpha)
 266         UseAlpha(true);
 267
 268     unsigned char* dest = (unsigned char*)GetRawAccess();
 269     unsigned char* source = (unsigned char*)tocopy.GetRawAccess();
 270     size_t numbytes = m_bytesPerRow * m_height;
 271     memcpy( dest, source, numbytes );
 272 }
 273
 274 wxBitmapRefData::wxBitmapRefData()
 275 {
 276     Init() ;
 277 }
 278
 279 wxBitmapRefData::wxBitmapRefData( int w , int h , int d )
 280 {
 281     Init() ;
 282     Create( w , h , d ) ;
 283 }
 284
 285 wxBitmapRefData::wxBitmapRefData(CGImageRef image)
 286 {
 287     Init();
 288     Create( image );
 289 }
 290 // code from Technical Q&A QA1509
 291
 292 bool wxBitmapRefData::Create(CGImageRef image)
 293 {
 294     if ( image != NULL )
 295     {
 296         m_width = CGImageGetWidth(image);
 297         m_height = CGImageGetHeight(image);
 298         m_depth = 32;
 299         m_hBitmap = NULL;
 300
 301         m_bytesPerRow = GetBestBytesPerRow( m_width * 4 ) ;
 302         size_t size = m_bytesPerRow * m_height ;
 303         void* data = m_memBuf.GetWriteBuf( size ) ;
 304         if ( data != NULL )
 305         {
 306             memset( data , 0 , size ) ;
 307             m_memBuf.UngetWriteBuf( size ) ;
 308             CGImageAlphaInfo alpha = CGImageGetAlphaInfo(image);
 309             if ( alpha == kCGImageAlphaNone || alpha == kCGImageAlphaNoneSkipLast || alpha == kCGImageAlphaNoneSkipLast )
 310             {
 311                 m_hBitmap = CGBitmapContextCreate((char*) data, m_width, m_height, 8, m_bytesPerRow, wxMacGetGenericRGBColorSpace(), kCGImageAlphaNoneSkipFirst );
 312             }
 313             else
 314             {
 315                 m_hasAlpha = true;
 316                 m_hBitmap = CGBitmapContextCreate((char*) data, m_width, m_height, 8, m_bytesPerRow, wxMacGetGenericRGBColorSpace(), kCGImageAlphaPremultipliedFirst );
 317             }
 318             CGRect rect = {{0,0},{m_width,m_height}};
 319             CGContextDrawImage(m_hBitmap, rect, image);
 320
 321             wxASSERT_MSG( m_hBitmap , wxT("Unable to create CGBitmapContext context") ) ;
 322             CGContextTranslateCTM( m_hBitmap, 0,  m_height );
 323             CGContextScaleCTM( m_hBitmap, 1, -1 );
 324         } /* data != NULL */
 325     }
 326     m_ok = ( m_hBitmap != NULL ) ;
 327
 328     return m_ok ;
 329
 330 }
 331
 332 bool wxBitmapRefData::Create( int w , int h , int d )
 333 {
 334     m_width = wxMax(1, w);
 335     m_height = wxMax(1, h);
 336     m_depth = d ;
 337     m_hBitmap = NULL ;
 338
 339     m_bytesPerRow = GetBestBytesPerRow( m_width * 4 ) ;
 340     size_t size = m_bytesPerRow * m_height ;
 341     void* data = m_memBuf.GetWriteBuf( size ) ;
 342     if ( data != NULL )
 343     {
 344         memset( data , 0 , size ) ;
 345         m_memBuf.UngetWriteBuf( size ) ;
 346
 347         m_hBitmap = CGBitmapContextCreate((char*) data, m_width, m_height, 8, m_bytesPerRow, wxMacGetGenericRGBColorSpace(), kCGImageAlphaNoneSkipFirst );
 348         wxASSERT_MSG( m_hBitmap , wxT("Unable to create CGBitmapContext context") ) ;
 349         CGContextTranslateCTM( m_hBitmap, 0,  m_height );
 350         CGContextScaleCTM( m_hBitmap, 1, -1 );
 351     } /* data != NULL */
 352     m_ok = ( m_hBitmap != NULL ) ;
 353
 354     return m_ok ;
 355 }
 356
 357 void wxBitmapRefData::UseAlpha( bool use )
 358 {
 359     if ( m_hasAlpha == use )
 360         return ;
 361
 362     m_hasAlpha = use ;
 363
 364     CGContextRelease( m_hBitmap );
 365     m_hBitmap = CGBitmapContextCreate((char*) m_memBuf.GetData(), m_width, m_height, 8, m_bytesPerRow, wxMacGetGenericRGBColorSpace(), m_hasAlpha ? kCGImageAlphaPremultipliedFirst : kCGImageAlphaNoneSkipFirst );
 366     wxASSERT_MSG( m_hBitmap , wxT("Unable to create CGBitmapContext context") ) ;
 367     CGContextTranslateCTM( m_hBitmap, 0,  m_height );
 368     CGContextScaleCTM( m_hBitmap, 1, -1 );
 369 }
 370
 371 void *wxBitmapRefData::GetRawAccess() const
 372 {
 373     wxCHECK_MSG( IsOk(), NULL , wxT("invalid bitmap") ) ;
 374     return m_memBuf.GetData() ;
 375 }
 376
 377 void *wxBitmapRefData::BeginRawAccess()
 378 {
 379     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") ) ;
 380     wxASSERT( m_rawAccessCount == 0 ) ;
 381 #ifndef __WXOSX_IPHONE__
 382     wxASSERT_MSG( m_pictHandle == NULL && m_iconRef == NULL ,
 383         wxT("Currently, modifing bitmaps that are used in controls already is not supported") ) ;
 384 #endif
 385     ++m_rawAccessCount ;
 386
 387     // we must destroy an existing cached image, as
 388     // the bitmap data may change now
 389     if ( m_cgImageRef )
 390     {
 391         CGImageRelease( m_cgImageRef ) ;
 392         m_cgImageRef = NULL ;
 393     }
 394
 395     return m_memBuf.GetData() ;
 396 }
 397
 398 void wxBitmapRefData::EndRawAccess()
 399 {
 400     wxCHECK_RET( IsOk() , wxT("invalid bitmap") ) ;
 401     wxASSERT( m_rawAccessCount == 1 ) ;
 402
 403     --m_rawAccessCount ;
 404 }
 405
 406 bool wxBitmapRefData::HasNativeSize()
 407 {
 408     int w = GetWidth() ;
 409     int h = GetHeight() ;
 410     int sz = wxMax( w , h ) ;
 411
 412     return ( sz == 128 || sz == 48 || sz == 32 || sz == 16 );
 413 }
 414
 415 #ifndef __WXOSX_IPHONE__
 416 IconRef wxBitmapRefData::GetIconRef()
 417 {
 418     if ( m_iconRef == NULL )
 419     {
 420         // Create Icon Family Handle
 421
 422         IconFamilyHandle iconFamily = (IconFamilyHandle) NewHandle( 0 );
 423
 424         int w = GetWidth() ;
 425         int h = GetHeight() ;
 426         int sz = wxMax( w , h ) ;
 427
 428         OSType dataType = 0 ;
 429         OSType maskType = 0 ;
 430
 431         switch (sz)
 432         {
 433             case 128:
 434 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
 435                 if ( UMAGetSystemVersion() >= 0x1050 )
 436                 {
 437                     dataType = kIconServices128PixelDataARGB ;
 438                 }
 439                 else
 440 #endif
 441                 {
 442                     dataType = kThumbnail32BitData ;
 443                     maskType = kThumbnail8BitMask ;
 444                 }
 445                 break;
 446
 447             case 48:
 448 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
 449                 if ( UMAGetSystemVersion() >= 0x1050 )
 450                 {
 451                     dataType = kIconServices48PixelDataARGB ;
 452                 }
 453                 else
 454 #endif
 455                 {
 456                     dataType = kHuge32BitData ;
 457                     maskType = kHuge8BitMask ;
 458                 }
 459                 break;
 460
 461             case 32:
 462 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
 463                 if ( UMAGetSystemVersion() >= 0x1050 )
 464                 {
 465                     dataType = kIconServices32PixelDataARGB ;
 466                 }
 467                 else
 468 #endif
 469                 {
 470                     dataType = kLarge32BitData ;
 471                     maskType = kLarge8BitMask ;
 472                 }
 473                 break;
 474
 475             case 16:
 476 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
 477                 if ( UMAGetSystemVersion() >= 0x1050 )
 478                 {
 479                     dataType = kIconServices16PixelDataARGB ;
 480                 }
 481                 else
 482 #endif
 483                 {
 484                     dataType = kSmall32BitData ;
 485                     maskType = kSmall8BitMask ;
 486                 }
 487                 break;
 488
 489             default:
 490                 break;
 491         }
 492
 493         if ( dataType != 0 )
 494         {
 495 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
 496             if (  maskType == 0 && UMAGetSystemVersion() >= 0x1050 )
 497             {
 498                 size_t datasize = sz * sz * 4 ;
 499                 Handle data = NewHandle( datasize ) ;
 500                 HLock( data ) ;
 501                 unsigned char* ptr = (unsigned char*) *data ;
 502                 memset( ptr, 0, datasize );
 503                 bool hasAlpha = HasAlpha() ;
 504                 wxMask *mask = m_bitmapMask ;
 505                 unsigned char * sourcePtr = (unsigned char*) GetRawAccess() ;
 506                 unsigned char * masksourcePtr = mask ? (unsigned char*) mask->GetRawAccess() : NULL ;
 507
 508                 for ( int y = 0 ; y < h ; ++y, sourcePtr += m_bytesPerRow , masksourcePtr += mask ? mask->GetBytesPerRow() : 0 )
 509                 {
 510                     unsigned char * source = sourcePtr;
 511                     unsigned char * masksource = masksourcePtr;
 512                     unsigned char * dest = ptr + y * sz * 4 ;
 513                     unsigned char a, r, g, b;
 514
 515                     for ( int x = 0 ; x < w ; ++x )
 516                     {
 517                         a = *source ++ ;
 518                         r = *source ++ ;
 519                         g = *source ++ ;
 520                         b = *source ++ ;
 521
 522                         if ( mask )
 523                         {
 524                             a = 0xFF - *masksource++ ;
 525                         }
 526                         else if ( !hasAlpha )
 527                             a = 0xFF ;
 528                         else
 529                         {
 530 #if wxOSX_USE_PREMULTIPLIED_ALPHA
 531                             // this must be non-premultiplied data
 532                             if ( a != 0xFF && a!= 0 )
 533                             {
 534                                 r = r * 255 / a;
 535                                 g = g * 255 / a;
 536                                 b = b * 255 / a;
 537                             }
 538 #endif
 539                         }
 540                         *dest++ = a ;
 541                         *dest++ = r ;
 542                         *dest++ = g ;
 543                         *dest++ = b ;
 544
 545                      }
 546                 }
 547                 HUnlock( data );
 548
 549                 OSStatus err = SetIconFamilyData( iconFamily, dataType , data );
 550                 if ( err != noErr )
 551                 {
 552                     wxFAIL_MSG("Error when adding bitmap");
 553                 }
 554
 555                 DisposeHandle( data );
 556             }
 557             else
 558 #endif
 559             {
 560                 // setup the header properly
 561
 562                 Handle data = NULL ;
 563                 Handle maskdata = NULL ;
 564                 unsigned char * maskptr = NULL ;
 565                 unsigned char * ptr = NULL ;
 566                 size_t datasize, masksize ;
 567
 568                 datasize = sz * sz * 4 ;
 569                 data = NewHandle( datasize ) ;
 570                 HLock( data ) ;
 571                 ptr = (unsigned char*) *data ;
 572                 memset( ptr , 0, datasize ) ;
 573
 574                 masksize = sz * sz ;
 575                 maskdata = NewHandle( masksize ) ;
 576                 HLock( maskdata ) ;
 577                 maskptr = (unsigned char*) *maskdata ;
 578                 memset( maskptr , 0 , masksize ) ;
 579
 580                 bool hasAlpha = HasAlpha() ;
 581                 wxMask *mask = m_bitmapMask ;
 582                 unsigned char * sourcePtr = (unsigned char*) GetRawAccess() ;
 583                 unsigned char * masksourcePtr = mask ? (unsigned char*) mask->GetRawAccess() : NULL ;
 584
 585                 for ( int y = 0 ; y < h ; ++y, sourcePtr += m_bytesPerRow , masksourcePtr += mask ? mask->GetBytesPerRow() : 0 )
 586                 {
 587                     unsigned char * source = sourcePtr;
 588                     unsigned char * masksource = masksourcePtr;
 589                     unsigned char * dest = ptr + y * sz * 4 ;
 590                     unsigned char * maskdest = maskptr + y * sz ;
 591                     unsigned char a, r, g, b;
 592
 593                     for ( int x = 0 ; x < w ; ++x )
 594                     {
 595                         a = *source ++ ;
 596                         r = *source ++ ;
 597                         g = *source ++ ;
 598                         b = *source ++ ;
 599
 600                         *dest++ = 0 ;
 601                         *dest++ = r ;
 602                         *dest++ = g ;
 603                         *dest++ = b ;
 604
 605                         if ( mask )
 606                             *maskdest++ = 0xFF - *masksource++ ;
 607                         else if ( hasAlpha )
 608                             *maskdest++ = a ;
 609                         else
 610                             *maskdest++ = 0xFF ;
 611                     }
 612                 }
 613
 614                 OSStatus err = SetIconFamilyData( iconFamily, dataType , data ) ;
 615                 wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 616
 617                 err = SetIconFamilyData( iconFamily, maskType , maskdata ) ;
 618                 wxASSERT_MSG( err == noErr , wxT("Error when adding mask") ) ;
 619
 620                 HUnlock( data ) ;
 621                 HUnlock( maskdata ) ;
 622                 DisposeHandle( data ) ;
 623                 DisposeHandle( maskdata ) ;
 624             }
 625         }
 626         else
 627         {
 628             PicHandle pic = GetPictHandle() ;
 629             SetIconFamilyData( iconFamily, 'PICT' , (Handle) pic ) ;
 630         }
 631         // transform into IconRef
 632
 633         // cleaner version existing from 10.3 upwards
 634         HLock((Handle) iconFamily);
 635         OSStatus err = GetIconRefFromIconFamilyPtr( *iconFamily, GetHandleSize((Handle) iconFamily), &m_iconRef );
 636         HUnlock((Handle) iconFamily);
 637         DisposeHandle( (Handle) iconFamily ) ;
 638
 639         wxCHECK_MSG( err == noErr, NULL, wxT("Error when constructing icon ref") );
 640     }
 641
 642     return m_iconRef ;
 643 }
 644
 645 PicHandle wxBitmapRefData::GetPictHandle()
 646 {
 647     if ( m_pictHandle == NULL )
 648     {
 649 #ifndef __LP64__
 650         GraphicsExportComponent exporter = 0;
 651         OSStatus err = OpenADefaultComponent(GraphicsExporterComponentType, kQTFileTypePicture, &exporter);
 652         if (noErr == err)
 653         {
 654             m_pictHandle = (PicHandle) NewHandle(0);
 655             if ( m_pictHandle )
 656             {
 657                 // QT does not correctly export the mask
 658                 // TODO if we get around to it create a synthetic PICT with the CopyBits and Mask commands
 659                 CGImageRef imageRef = CreateCGImage();
 660                 err = GraphicsExportSetInputCGImage( exporter, imageRef );
 661                 err = GraphicsExportSetOutputHandle(exporter, (Handle)m_pictHandle);
 662                 err = GraphicsExportDoExport(exporter, NULL);
 663                 CGImageRelease( imageRef );
 664
 665                 size_t handleSize = GetHandleSize( (Handle) m_pictHandle );
 666                 // the 512 bytes header is only needed for pict files, but not in memory
 667                 if ( handleSize >= 512 )
 668                 {
 669                     memmove( *m_pictHandle , (char*)(*m_pictHandle)+512, handleSize - 512 );
 670                     SetHandleSize( (Handle) m_pictHandle, handleSize - 512 );
 671                 }
 672             }
 673             CloseComponent( exporter );
 674         }
 675 #endif
 676     }
 677
 678     return m_pictHandle ;
 679 }
 680 #endif
 681
 682 CGImageRef wxBitmapRefData::CreateCGImage() const
 683 {
 684     wxASSERT( m_ok ) ;
 685     wxASSERT( m_rawAccessCount >= 0 ) ;
 686     CGImageRef image ;
 687     if ( m_rawAccessCount > 0 || m_cgImageRef == NULL )
 688     {
 689         if ( m_depth != 1 && m_bitmapMask == NULL )
 690         {
 691 #if 0
 692             // in order for this code to work properly, wxMask would have to invert black and white
 693             // in the native bitmap
 694             if ( m_bitmapMask )
 695             {
 696                 CGImageRef tempImage = CGBitmapContextCreateImage( m_hBitmap );
 697                 CGImageRef tempMask = CGBitmapContextCreateImage((CGContextRef) m_bitmapMask->GetHBITMAP() );
 698                 image = CGImageCreateWithMask( tempImage, tempMask );
 699                 CGImageRelease(tempMask);
 700                 CGImageRelease(tempImage);
 701             }
 702             else
 703 #endif
 704                 image = CGBitmapContextCreateImage( m_hBitmap );
 705         }
 706         else
 707         {
 708             size_t imageSize = m_height * m_bytesPerRow ;
 709             void * dataBuffer = m_memBuf.GetData() ;
 710             int w = m_width ;
 711             int h = m_height ;
 712             CGImageAlphaInfo alphaInfo = kCGImageAlphaNoneSkipFirst ;
 713             wxMemoryBuffer membuf;
 714
 715             if ( m_bitmapMask )
 716             {
 717                 alphaInfo = kCGImageAlphaFirst ;
 718                 unsigned char *destalphastart = (unsigned char*) membuf.GetWriteBuf( imageSize ) ;
 719                 memcpy( destalphastart , dataBuffer , imageSize ) ;
 720                 unsigned char *sourcemaskstart = (unsigned char *) m_bitmapMask->GetRawAccess() ;
 721                 int maskrowbytes = m_bitmapMask->GetBytesPerRow() ;
 722                 for ( int y = 0 ; y < h ; ++y , destalphastart += m_bytesPerRow, sourcemaskstart += maskrowbytes)
 723                 {
 724                     unsigned char *sourcemask = sourcemaskstart ;
 725                     unsigned char *destalpha = destalphastart ;
 726                     for ( int x = 0 ; x < w ; ++x , sourcemask += kMaskBytesPerPixel , destalpha += 4 )
 727                     {
 728                         *destalpha = 0xFF - *sourcemask ;
 729                     }
 730                 }
 731                 membuf.UngetWriteBuf( imageSize );
 732             }
 733             else
 734             {
 735                 if ( m_hasAlpha )
 736                 {
 737 #if wxOSX_USE_PREMULTIPLIED_ALPHA
 738                     alphaInfo = kCGImageAlphaPremultipliedFirst ;
 739 #else
 740                     alphaInfo = kCGImageAlphaFirst ;
 741 #endif
 742                 }
 743
 744                 membuf = m_memBuf;
 745             }
 746
 747             CGDataProviderRef dataProvider = NULL ;
 748             if ( m_depth == 1 )
 749             {
 750                 // TODO CHECK ALIGNMENT
 751                 wxMemoryBuffer maskBuf;
 752                 unsigned char * maskBufData = (unsigned char*) maskBuf.GetWriteBuf( m_width * m_height );
 753                 unsigned char * bufData = (unsigned char *) membuf.GetData() ;
 754                 // copy one color component
 755                 size_t i = 0;
 756                 for( int y = 0 ; y < m_height ; bufData+= m_bytesPerRow, ++y )
 757                 {
 758                     unsigned char *bufDataIter = bufData+3;
 759                     for ( int x = 0 ; x < m_width ; bufDataIter += 4, ++x, ++i )
 760                     {
 761                         maskBufData[i] = *bufDataIter;
 762                     }
 763                 }
 764                 maskBuf.UngetWriteBuf( m_width * m_height );
 765
 766                 dataProvider =
 767                     wxMacCGDataProviderCreateWithMemoryBuffer( maskBuf );
 768
 769                 image = ::CGImageMaskCreate( w, h, 8, 8, m_width , dataProvider, NULL, false );
 770             }
 771             else
 772             {
 773                 CGColorSpaceRef colorSpace = wxMacGetGenericRGBColorSpace();
 774                 dataProvider = wxMacCGDataProviderCreateWithMemoryBuffer( membuf );
 775                 image =
 776                     ::CGImageCreate(
 777                                     w, h, 8 , 32 , m_bytesPerRow , colorSpace, alphaInfo ,
 778                                     dataProvider, NULL , false , kCGRenderingIntentDefault );
 779             }
 780             CGDataProviderRelease( dataProvider);
 781         }
 782     }
 783     else
 784     {
 785         image = m_cgImageRef ;
 786         CGImageRetain( image ) ;
 787     }
 788
 789     if ( m_rawAccessCount == 0 && m_cgImageRef == NULL)
 790     {
 791         // we keep it for later use
 792         m_cgImageRef = image ;
 793         CGImageRetain( image ) ;
 794     }
 795
 796     return image ;
 797 }
 798
 799 CGContextRef wxBitmapRefData::GetBitmapContext() const
 800 {
 801     return m_hBitmap;
 802 }
 803
 804 void wxBitmapRefData::Free()
 805 {
 806     wxASSERT_MSG( m_rawAccessCount == 0 , wxT("Bitmap still selected when destroyed") ) ;
 807
 808     if ( m_cgImageRef )
 809     {
 810         CGImageRelease( m_cgImageRef ) ;
 811         m_cgImageRef = NULL ;
 812     }
 813 #ifndef __WXOSX_IPHONE__
 814     if ( m_iconRef )
 815     {
 816         ReleaseIconRef( m_iconRef ) ;
 817         m_iconRef = NULL ;
 818     }
 819
 820 #ifndef __LP64__
 821     if ( m_pictHandle )
 822     {
 823         KillPicture( m_pictHandle ) ;
 824         m_pictHandle = NULL ;
 825     }
 826 #endif
 827 #endif
 828     if ( m_hBitmap )
 829     {
 830         CGContextRelease(m_hBitmap);
 831         m_hBitmap = NULL ;
 832     }
 833
 834     wxDELETE(m_bitmapMask);
 835 }
 836
 837 wxBitmapRefData::~wxBitmapRefData()
 838 {
 839     Free() ;
 840 }
 841
 842
 843
 844 // ----------------------------------------------------------------------------
 845 // wxBitmap
 846 // ----------------------------------------------------------------------------
 847
 848 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 849 {
 850     bool created = false ;
 851     int w = icon.GetWidth() ;
 852     int h = icon.GetHeight() ;
 853
 854     Create( w , h ) ;
 855 #ifdef __WXOSX_CARBON__
 856     if ( w == h && ( w == 16 || w == 32 || w == 48 || w == 128 ) )
 857     {
 858         IconFamilyHandle iconFamily = NULL ;
 859         Handle imagehandle = NewHandle( 0 ) ;
 860         Handle maskhandle = NewHandle( 0 ) ;
 861
 862         OSType maskType = 0;
 863         OSType dataType = 0;
 864         IconSelectorValue selector = 0 ;
 865
 866         switch (w)
 867         {
 868             case 128:
 869                 dataType = kThumbnail32BitData ;
 870                 maskType = kThumbnail8BitMask ;
 871                 selector = kSelectorAllAvailableData ;
 872                 break;
 873
 874             case 48:
 875                 dataType = kHuge32BitData ;
 876                 maskType = kHuge8BitMask ;
 877                 selector = kSelectorHuge32Bit | kSelectorHuge8BitMask ;
 878                 break;
 879
 880             case 32:
 881                 dataType = kLarge32BitData ;
 882                 maskType = kLarge8BitMask ;
 883                 selector = kSelectorLarge32Bit | kSelectorLarge8BitMask ;
 884                 break;
 885
 886             case 16:
 887                 dataType = kSmall32BitData ;
 888                 maskType = kSmall8BitMask ;
 889                 selector = kSelectorSmall32Bit | kSelectorSmall8BitMask ;
 890                 break;
 891
 892             default:
 893                 break;
 894         }
 895
 896         OSStatus err = IconRefToIconFamily( MAC_WXHICON(icon.GetHICON()) , selector , &iconFamily ) ;
 897
 898         err = GetIconFamilyData( iconFamily , dataType , imagehandle ) ;
 899         err = GetIconFamilyData( iconFamily , maskType , maskhandle ) ;
 900         size_t imagehandlesize = GetHandleSize( imagehandle ) ;
 901         size_t maskhandlesize = GetHandleSize( maskhandle ) ;
 902
 903         if ( imagehandlesize != 0 && maskhandlesize != 0 )
 904         {
 905             wxASSERT( GetHandleSize( imagehandle ) == w * 4 * h ) ;
 906             wxASSERT( GetHandleSize( maskhandle ) == w * h ) ;
 907
 908             UseAlpha() ;
 909
 910             unsigned char *source = (unsigned char *) *imagehandle ;
 911             unsigned char *sourcemask = (unsigned char *) *maskhandle ;
 912             unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 913
 914             for ( int y = 0 ; y < h ; ++y )
 915             {
 916                 for ( int x = 0 ; x < w ; ++x )
 917                 {
 918                     unsigned char a = *sourcemask++;
 919                     *destination++ = a;
 920                     source++ ;
 921 #if wxOSX_USE_PREMULTIPLIED_ALPHA
 922                     *destination++ = ( (*source++) * a + 127 ) / 255;
 923                     *destination++ = ( (*source++) * a + 127 ) / 255;
 924                     *destination++ = ( (*source++) * a + 127 ) / 255;
 925 #else
 926                     *destination++ = *source++ ;
 927                     *destination++ = *source++ ;
 928                     *destination++ = *source++ ;
 929 #endif
 930                 }
 931             }
 932
 933             EndRawAccess() ;
 934             DisposeHandle( imagehandle ) ;
 935             DisposeHandle( maskhandle ) ;
 936             created = true ;
 937         }
 938
 939         DisposeHandle( (Handle) iconFamily ) ;
 940     }
 941 #endif
 942     if ( !created )
 943     {
 944         wxMemoryDC dc ;
 945         dc.SelectObject( *this ) ;
 946         dc.DrawIcon( icon , 0 , 0 ) ;
 947         dc.SelectObject( wxNullBitmap ) ;
 948     }
 949
 950     return true;
 951 }
 952
 953 wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
 954 {
 955     wxBitmapRefData* bitmapRefData;
 956
 957     m_refData = bitmapRefData = new wxBitmapRefData( the_width , the_height , no_bits ) ;
 958
 959     if (bitmapRefData->IsOk())
 960     {
 961         if ( no_bits == 1 )
 962         {
 963             int linesize = ( the_width / (sizeof(unsigned char) * 8)) ;
 964             if ( the_width % (sizeof(unsigned char) * 8) )
 965                 linesize += sizeof(unsigned char);
 966
 967             unsigned char* linestart = (unsigned char*) bits ;
 968             unsigned char* destptr = (unsigned char*) BeginRawAccess() ;
 969
 970             for ( int y = 0 ; y < the_height ; ++y , linestart += linesize, destptr += M_BITMAPDATA->GetBytesPerRow() )
 971             {
 972                 unsigned char* destination = destptr;
 973                 int index, bit, mask;
 974
 975                 for ( int x = 0 ; x < the_width ; ++x )
 976                 {
 977                     index = x / 8 ;
 978                     bit = x % 8 ;
 979                     mask = 1 << bit ;
 980
 981                     if ( linestart[index] & mask )
 982                     {
 983                         *destination++ = 0xFF ;
 984                         *destination++ = 0 ;
 985                         *destination++ = 0 ;
 986                         *destination++ = 0 ;
 987                     }
 988                     else
 989                     {
 990                         *destination++ = 0xFF ;
 991                         *destination++ = 0xFF ;
 992                         *destination++ = 0xFF ;
 993                         *destination++ = 0xFF ;
 994                     }
 995                 }
 996             }
 997
 998             EndRawAccess() ;
 999         }
1000         else
1001         {
1002             wxFAIL_MSG(wxT("multicolor BITMAPs not yet implemented"));
1003         }
1004     } /* bitmapRefData->IsOk() */
1005 }
1006
1007 wxBitmap::wxBitmap(const void* data, wxBitmapType type, int width, int height, int depth)
1008 {
1009     (void) Create(data, type, width, height, depth);
1010 }
1011
1012 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
1013 {
1014     LoadFile(filename, type);
1015 }
1016
1017 wxBitmap::wxBitmap(CGImageRef image)
1018 {
1019     (void) Create(image);
1020 }
1021
1022 wxGDIRefData* wxBitmap::CreateGDIRefData() const
1023 {
1024     return new wxBitmapRefData;
1025 }
1026
1027 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
1028 {
1029     return new wxBitmapRefData(*static_cast<const wxBitmapRefData *>(data));
1030 }
1031
1032 void * wxBitmap::GetRawAccess() const
1033 {
1034     wxCHECK_MSG( IsOk() , NULL , wxT("invalid bitmap") ) ;
1035
1036     return M_BITMAPDATA->GetRawAccess() ;
1037 }
1038
1039 void * wxBitmap::BeginRawAccess()
1040 {
1041     wxCHECK_MSG( IsOk() , NULL , wxT("invalid bitmap") ) ;
1042
1043     return M_BITMAPDATA->BeginRawAccess() ;
1044 }
1045
1046 void wxBitmap::EndRawAccess()
1047 {
1048     wxCHECK_RET( IsOk() , wxT("invalid bitmap") ) ;
1049
1050     M_BITMAPDATA->EndRawAccess() ;
1051 }
1052
1053 CGImageRef wxBitmap::CreateCGImage() const
1054 {
1055     wxCHECK_MSG( IsOk(), NULL , wxT("invalid bitmap") ) ;
1056
1057     return M_BITMAPDATA->CreateCGImage() ;
1058 }
1059
1060 #ifndef  __WXOSX_IPHONE__
1061 IconRef wxBitmap::GetIconRef() const
1062 {
1063     wxCHECK_MSG( IsOk(), NULL , wxT("invalid bitmap") ) ;
1064
1065     return M_BITMAPDATA->GetIconRef() ;
1066 }
1067
1068 IconRef wxBitmap::CreateIconRef() const
1069 {
1070     IconRef icon = GetIconRef();
1071     verify_noerr( AcquireIconRef(icon) );
1072     return icon;
1073 }
1074 #endif
1075
1076 #if wxOSX_USE_COCOA
1077
1078 WX_NSImage wxBitmap::GetNSImage() const
1079 {
1080     wxCFRef< CGImageRef > cgimage(CreateCGImage());
1081     return wxOSXGetNSImageFromCGImage( cgimage );
1082 }
1083
1084 #endif
1085
1086 #if wxOSX_USE_IPHONE
1087
1088 WX_UIImage wxBitmap::GetUIImage() const
1089 {
1090     wxCFRef< CGImageRef > cgimage(CreateCGImage());
1091     return wxOSXGetUIImageFromCGImage( cgimage );
1092 }
1093
1094 #endif
1095 wxBitmap wxBitmap::GetSubBitmap(const wxRect &rect) const
1096 {
1097     wxCHECK_MSG( IsOk() &&
1098                 (rect.x >= 0) && (rect.y >= 0) &&
1099                 (rect.x+rect.width <= GetWidth()) &&
1100                 (rect.y+rect.height <= GetHeight()),
1101                 wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1102
1103     wxBitmap ret( rect.width, rect.height, GetDepth() );
1104     wxASSERT_MSG( ret.IsOk(), wxT("GetSubBitmap error") );
1105
1106     int destwidth = rect.width ;
1107     int destheight = rect.height ;
1108
1109     {
1110         unsigned char *sourcedata = (unsigned char*) GetRawAccess() ;
1111         unsigned char *destdata = (unsigned char*) ret.BeginRawAccess() ;
1112         wxASSERT( (sourcedata != NULL) && (destdata != NULL) ) ;
1113
1114         int sourcelinesize = GetBitmapData()->GetBytesPerRow() ;
1115         int destlinesize = ret.GetBitmapData()->GetBytesPerRow() ;
1116         unsigned char *source = sourcedata + rect.x * 4 + rect.y * sourcelinesize ;
1117         unsigned char *dest = destdata ;
1118
1119         for (int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
1120         {
1121             memcpy( dest , source , destlinesize ) ;
1122         }
1123     }
1124
1125     ret.EndRawAccess() ;
1126
1127     if ( M_BITMAPDATA->m_bitmapMask )
1128     {
1129         wxMemoryBuffer maskbuf ;
1130         int rowBytes = GetBestBytesPerRow( destwidth * kMaskBytesPerPixel );
1131         size_t maskbufsize = rowBytes * destheight ;
1132
1133         int sourcelinesize = M_BITMAPDATA->m_bitmapMask->GetBytesPerRow() ;
1134         int destlinesize = rowBytes ;
1135
1136         unsigned char *source = (unsigned char *) M_BITMAPDATA->m_bitmapMask->GetRawAccess() ;
1137         unsigned char *destdata = (unsigned char * ) maskbuf.GetWriteBuf( maskbufsize ) ;
1138         wxASSERT( (source != NULL) && (destdata != NULL) ) ;
1139
1140         source += rect.x * kMaskBytesPerPixel + rect.y * sourcelinesize ;
1141         unsigned char *dest = destdata ;
1142
1143         for (int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
1144         {
1145             memcpy( dest , source , destlinesize ) ;
1146         }
1147
1148         maskbuf.UngetWriteBuf( maskbufsize ) ;
1149         ret.SetMask( new wxMask( maskbuf , destwidth , destheight , rowBytes ) ) ;
1150     }
1151     else if ( HasAlpha() )
1152         ret.UseAlpha() ;
1153
1154     return ret;
1155 }
1156
1157 bool wxBitmap::Create(int w, int h, int d)
1158 {
1159     UnRef();
1160
1161     if ( d < 0 )
1162         d = wxDisplayDepth() ;
1163
1164     m_refData = new wxBitmapRefData( w , h , d );
1165
1166     return M_BITMAPDATA->IsOk() ;
1167 }
1168
1169
1170 bool wxBitmap::Create(CGImageRef image)
1171 {
1172     UnRef();
1173
1174     m_refData = new wxBitmapRefData( image );
1175
1176     return M_BITMAPDATA->IsOk() ;
1177 }
1178
1179 bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
1180 {
1181     UnRef();
1182
1183     wxBitmapHandler *handler = FindHandler(type);
1184
1185     if ( handler )
1186     {
1187         m_refData = new wxBitmapRefData;
1188
1189         return handler->LoadFile(this, filename, type, -1, -1);
1190     }
1191     else
1192     {
1193 #if wxUSE_IMAGE
1194         wxImage loadimage(filename, type);
1195         if (loadimage.IsOk())
1196         {
1197             *this = loadimage;
1198
1199             return true;
1200         }
1201 #endif
1202     }
1203
1204     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1205
1206     return false;
1207 }
1208
1209 bool wxBitmap::Create(const void* data, wxBitmapType type, int width, int height, int depth)
1210 {
1211     UnRef();
1212
1213     m_refData = new wxBitmapRefData;
1214
1215     wxBitmapHandler *handler = FindHandler(type);
1216
1217     if ( handler == NULL )
1218     {
1219         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1220
1221         return false;
1222     }
1223
1224     return handler->Create(this, data, type, width, height, depth);
1225 }
1226
1227 #if wxUSE_IMAGE
1228
1229 wxBitmap::wxBitmap(const wxImage& image, int depth)
1230 {
1231     wxCHECK_RET( image.IsOk(), wxT("invalid image") );
1232
1233     // width and height of the device-dependent bitmap
1234     int width = image.GetWidth();
1235     int height = image.GetHeight();
1236
1237     wxBitmapRefData* bitmapRefData;
1238
1239     m_refData = bitmapRefData = new wxBitmapRefData( width , height , depth ) ;
1240
1241     if ( bitmapRefData->IsOk())
1242     {
1243         // Create picture
1244
1245         bool hasAlpha = false ;
1246
1247         if ( image.HasMask() )
1248         {
1249             // takes precedence, don't mix with alpha info
1250         }
1251         else
1252         {
1253             hasAlpha = image.HasAlpha() ;
1254         }
1255
1256         if ( hasAlpha )
1257             UseAlpha() ;
1258
1259         unsigned char* destinationstart = (unsigned char*) BeginRawAccess() ;
1260         register unsigned char* data = image.GetData();
1261         if ( destinationstart != NULL && data != NULL )
1262         {
1263             const unsigned char *alpha = hasAlpha ? image.GetAlpha() : NULL ;
1264             for (int y = 0; y < height; destinationstart += M_BITMAPDATA->GetBytesPerRow(), y++)
1265             {
1266                 unsigned char * destination = destinationstart;
1267                 for (int x = 0; x < width; x++)
1268                 {
1269                     if ( hasAlpha )
1270                     {
1271                         const unsigned char a = *alpha++;
1272                         *destination++ = a ;
1273
1274     #if wxOSX_USE_PREMULTIPLIED_ALPHA
1275                         *destination++ = ((*data++) * a + 127) / 255 ;
1276                         *destination++ = ((*data++) * a + 127) / 255 ;
1277                         *destination++ = ((*data++) * a + 127) / 255 ;
1278     #else
1279                         *destination++ = *data++ ;
1280                         *destination++ = *data++ ;
1281                         *destination++ = *data++ ;
1282     #endif
1283                     }
1284                     else
1285                     {
1286                         *destination++ = 0xFF ;
1287                         *destination++ = *data++ ;
1288                         *destination++ = *data++ ;
1289                         *destination++ = *data++ ;
1290                     }
1291                 }
1292             }
1293
1294             EndRawAccess() ;
1295         }
1296         if ( image.HasMask() )
1297             SetMask( new wxMask( *this , wxColour( image.GetMaskRed() , image.GetMaskGreen() , image.GetMaskBlue() ) ) ) ;
1298     } /* bitmapRefData->IsOk() */
1299 }
1300
1301 wxImage wxBitmap::ConvertToImage() const
1302 {
1303     wxImage image;
1304
1305     wxCHECK_MSG( IsOk(), wxNullImage, wxT("invalid bitmap") );
1306
1307     // create an wxImage object
1308     int width = GetWidth();
1309     int height = GetHeight();
1310     image.Create( width, height );
1311
1312     unsigned char *data = image.GetData();
1313     wxCHECK_MSG( data, wxNullImage, wxT("Could not allocate data for image") );
1314
1315     unsigned char* sourcestart = (unsigned char*) GetRawAccess() ;
1316
1317     bool hasAlpha = false ;
1318     bool hasMask = false ;
1319     int maskBytesPerRow = 0 ;
1320     unsigned char *alpha = NULL ;
1321     unsigned char *mask = NULL ;
1322
1323     if ( HasAlpha() )
1324         hasAlpha = true ;
1325
1326     if ( GetMask() )
1327     {
1328         hasMask = true ;
1329         mask = (unsigned char*) GetMask()->GetRawAccess() ;
1330         maskBytesPerRow = GetMask()->GetBytesPerRow() ;
1331     }
1332
1333     if ( hasAlpha )
1334     {
1335         image.SetAlpha() ;
1336         alpha = image.GetAlpha() ;
1337     }
1338
1339     int index = 0;
1340
1341     // The following masking algorithm is the same as well in msw/gtk:
1342     // the colour used as transparent one in wxImage and the one it is
1343     // replaced with when it actually occurs in the bitmap
1344     static const int MASK_RED = 1;
1345     static const int MASK_GREEN = 2;
1346     static const int MASK_BLUE = 3;
1347     static const int MASK_BLUE_REPLACEMENT = 2;
1348
1349     for (int yy = 0; yy < height; yy++ , sourcestart += M_BITMAPDATA->GetBytesPerRow() , mask += maskBytesPerRow )
1350     {
1351         unsigned char * maskp = mask ;
1352         unsigned char * source = sourcestart;
1353         unsigned char a, r, g, b;
1354         long color;
1355
1356         for (int xx = 0; xx < width; xx++)
1357         {
1358             color = *((long*) source) ;
1359 #ifdef WORDS_BIGENDIAN
1360             a = ((color&0xFF000000) >> 24) ;
1361             r = ((color&0x00FF0000) >> 16) ;
1362             g = ((color&0x0000FF00) >> 8) ;
1363             b = (color&0x000000FF);
1364 #else
1365             b = ((color&0xFF000000) >> 24) ;
1366             g = ((color&0x00FF0000) >> 16) ;
1367             r = ((color&0x0000FF00) >> 8) ;
1368             a = (color&0x000000FF);
1369 #endif
1370             if ( hasMask )
1371             {
1372                 if ( *maskp++ == 0xFF )
1373                 {
1374                     r = MASK_RED ;
1375                     g = MASK_GREEN ;
1376                     b = MASK_BLUE ;
1377                 }
1378                 else if ( r == MASK_RED && g == MASK_GREEN && b == MASK_BLUE )
1379                     b = MASK_BLUE_REPLACEMENT ;
1380             }
1381             else if ( hasAlpha )
1382             {
1383                 *alpha++ = a ;
1384 #if wxOSX_USE_PREMULTIPLIED_ALPHA
1385                 // this must be non-premultiplied data
1386                 if ( a != 0xFF && a!= 0 )
1387                 {
1388                     r = r * 255 / a;
1389                     g = g * 255 / a;
1390                     b = b * 255 / a;
1391                 }
1392 #endif
1393             }
1394
1395             data[index    ] = r ;
1396             data[index + 1] = g ;
1397             data[index + 2] = b ;
1398
1399             index += 3;
1400             source += 4 ;
1401         }
1402     }
1403
1404     if ( hasMask )
1405         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1406
1407     return image;
1408 }
1409
1410 #endif //wxUSE_IMAGE
1411
1412 bool wxBitmap::SaveFile( const wxString& filename,
1413     wxBitmapType type, const wxPalette *palette ) const
1414 {
1415     bool success = false;
1416     wxBitmapHandler *handler = FindHandler(type);
1417
1418     if ( handler )
1419     {
1420         success = handler->SaveFile(this, filename, type, palette);
1421     }
1422     else
1423     {
1424 #if wxUSE_IMAGE
1425         wxImage image = ConvertToImage();
1426         success = image.SaveFile(filename, type);
1427 #else
1428         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1429 #endif
1430     }
1431
1432     return success;
1433 }
1434
1435 int wxBitmap::GetHeight() const
1436 {
1437    wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
1438
1439    return M_BITMAPDATA->GetHeight();
1440 }
1441
1442 int wxBitmap::GetWidth() const
1443 {
1444    wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
1445
1446    return M_BITMAPDATA->GetWidth() ;
1447 }
1448
1449 int wxBitmap::GetDepth() const
1450 {
1451    wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
1452
1453    return M_BITMAPDATA->GetDepth();
1454 }
1455
1456 wxMask *wxBitmap::GetMask() const
1457 {
1458    wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
1459
1460    return M_BITMAPDATA->m_bitmapMask;
1461 }
1462
1463 bool wxBitmap::HasAlpha() const
1464 {
1465    wxCHECK_MSG( IsOk(), false , wxT("invalid bitmap") );
1466
1467    return M_BITMAPDATA->HasAlpha() ;
1468 }
1469
1470 void wxBitmap::SetWidth(int w)
1471 {
1472     AllocExclusive();
1473     M_BITMAPDATA->SetWidth(w);
1474 }
1475
1476 void wxBitmap::SetHeight(int h)
1477 {
1478     AllocExclusive();
1479     M_BITMAPDATA->SetHeight(h);
1480 }
1481
1482 void wxBitmap::SetDepth(int d)
1483 {
1484     AllocExclusive();
1485     M_BITMAPDATA->SetDepth(d);
1486 }
1487
1488 void wxBitmap::SetOk(bool isOk)
1489 {
1490     AllocExclusive();
1491     M_BITMAPDATA->SetOk(isOk);
1492 }
1493
1494 #if wxUSE_PALETTE
1495 wxPalette *wxBitmap::GetPalette() const
1496 {
1497    wxCHECK_MSG( IsOk(), NULL, wxT("Invalid bitmap  GetPalette()") );
1498
1499    return &M_BITMAPDATA->m_bitmapPalette;
1500 }
1501
1502 void wxBitmap::SetPalette(const wxPalette& palette)
1503 {
1504     AllocExclusive();
1505     M_BITMAPDATA->m_bitmapPalette = palette ;
1506 }
1507 #endif // wxUSE_PALETTE
1508
1509 void wxBitmap::SetMask(wxMask *mask)
1510 {
1511     AllocExclusive();
1512     // Remove existing mask if there is one.
1513     delete M_BITMAPDATA->m_bitmapMask;
1514
1515     M_BITMAPDATA->m_bitmapMask = mask ;
1516 }
1517
1518 WXHBITMAP wxBitmap::GetHBITMAP(WXHBITMAP* mask) const
1519 {
1520     wxUnusedVar(mask);
1521
1522     return WXHBITMAP(M_BITMAPDATA->GetBitmapContext());
1523 }
1524
1525 // ----------------------------------------------------------------------------
1526 // wxMask
1527 // ----------------------------------------------------------------------------
1528
1529 wxMask::wxMask()
1530 {
1531     Init() ;
1532 }
1533
1534 wxMask::wxMask(const wxMask &tocopy) : wxObject()
1535 {
1536     Init();
1537
1538     m_bytesPerRow = tocopy.m_bytesPerRow;
1539     m_width = tocopy.m_width;
1540     m_height = tocopy.m_height;
1541
1542     size_t size = m_bytesPerRow * m_height;
1543     unsigned char* dest = (unsigned char*)m_memBuf.GetWriteBuf( size );
1544     unsigned char* source = (unsigned char*)tocopy.m_memBuf.GetData();
1545     memcpy( dest, source, size );
1546     m_memBuf.UngetWriteBuf( size ) ;
1547     RealizeNative() ;
1548 }
1549
1550 // Construct a mask from a bitmap and a colour indicating
1551 // the transparent area
1552 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
1553 {
1554     Init() ;
1555     Create( bitmap, colour );
1556 }
1557
1558 // Construct a mask from a mono bitmap (copies the bitmap).
1559 wxMask::wxMask( const wxBitmap& bitmap )
1560 {
1561     Init() ;
1562     Create( bitmap );
1563 }
1564
1565 // Construct a mask from a mono bitmap (copies the bitmap).
1566
1567 wxMask::wxMask( const wxMemoryBuffer& data, int width , int height , int bytesPerRow )
1568 {
1569     Init() ;
1570     Create( data, width , height , bytesPerRow );
1571 }
1572
1573 wxMask::~wxMask()
1574 {
1575     if ( m_maskBitmap )
1576     {
1577         CGContextRelease( (CGContextRef) m_maskBitmap );
1578         m_maskBitmap = NULL ;
1579     }
1580 }
1581
1582 void wxMask::Init()
1583 {
1584     m_width = m_height = m_bytesPerRow = 0 ;
1585     m_maskBitmap = NULL ;
1586 }
1587
1588 void *wxMask::GetRawAccess() const
1589 {
1590     return m_memBuf.GetData() ;
1591 }
1592
1593 // The default ColorTable for k8IndexedGrayPixelFormat in Intel appears to be broken, so we'll use an non-indexed
1594 // bitmap mask instead; in order to keep the code simple, the change applies to PowerPC implementations as well
1595
1596 void wxMask::RealizeNative()
1597 {
1598     if ( m_maskBitmap )
1599     {
1600         CGContextRelease( (CGContextRef) m_maskBitmap );
1601        m_maskBitmap = NULL ;
1602     }
1603
1604     CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceGray();
1605     // from MouseTracking sample :
1606     // Ironically, due to a bug in CGImageCreateWithMask, you cannot use
1607     // CGColorSpaceCreateWithName(kCGColorSpaceGenericGray) at this point!
1608
1609     m_maskBitmap = CGBitmapContextCreate((char*) m_memBuf.GetData(), m_width, m_height, 8, m_bytesPerRow, colorspace,
1610         kCGImageAlphaNone );
1611     CGColorSpaceRelease( colorspace );
1612     wxASSERT_MSG( m_maskBitmap , wxT("Unable to create CGBitmapContext context") ) ;
1613 }
1614
1615 // Create a mask from a mono bitmap (copies the bitmap).
1616
1617 bool wxMask::Create(const wxMemoryBuffer& data,int width , int height , int bytesPerRow)
1618 {
1619     m_memBuf = data ;
1620     m_width = width ;
1621     m_height = height ;
1622     m_bytesPerRow = bytesPerRow ;
1623
1624     wxASSERT( data.GetDataLen() == (size_t)(height * bytesPerRow) ) ;
1625
1626     RealizeNative() ;
1627
1628     return true ;
1629 }
1630
1631 // Create a mask from a mono bitmap (copies the bitmap).
1632 bool wxMask::Create(const wxBitmap& bitmap)
1633 {
1634     m_width = bitmap.GetWidth() ;
1635     m_height = bitmap.GetHeight() ;
1636     m_bytesPerRow = GetBestBytesPerRow( m_width * kMaskBytesPerPixel ) ;
1637
1638     size_t size = m_bytesPerRow * m_height ;
1639     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1640     wxASSERT( destdatabase != NULL ) ;
1641
1642     memset( destdatabase , 0 , size ) ;
1643     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1644
1645     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow )
1646     {
1647         unsigned char *destdata = destdatabase ;
1648         unsigned char r, g, b;
1649
1650         for ( int x = 0 ; x < m_width ; ++x )
1651         {
1652             srcdata++ ;
1653             r = *srcdata++ ;
1654             g = *srcdata++ ;
1655             b = *srcdata++ ;
1656
1657             if ( ( r + g + b ) > 0x10 )
1658                 *destdata++ = 0xFF ;
1659             else
1660                 *destdata++ = 0x00 ;
1661         }
1662     }
1663
1664     m_memBuf.UngetWriteBuf( size ) ;
1665     RealizeNative() ;
1666
1667     return true;
1668 }
1669
1670 // Create a mask from a bitmap and a colour indicating
1671 // the transparent area
1672 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1673 {
1674     m_width = bitmap.GetWidth() ;
1675     m_height = bitmap.GetHeight() ;
1676     m_bytesPerRow = GetBestBytesPerRow( m_width * kMaskBytesPerPixel ) ;
1677
1678     size_t size = m_bytesPerRow * m_height ;
1679     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1680     wxASSERT( destdatabase != NULL ) ;
1681
1682     memset( destdatabase , 0 , size ) ;
1683     unsigned char * srcdatabase = (unsigned char*) bitmap.GetRawAccess() ;
1684     size_t sourceBytesRow = bitmap.GetBitmapData()->GetBytesPerRow();
1685
1686     for ( int y = 0 ; y < m_height ; ++y , srcdatabase+= sourceBytesRow, destdatabase += m_bytesPerRow)
1687     {
1688         unsigned char *srcdata = srcdatabase ;
1689         unsigned char *destdata = destdatabase ;
1690         unsigned char r, g, b;
1691
1692         for ( int x = 0 ; x < m_width ; ++x )
1693         {
1694             srcdata++ ;
1695             r = *srcdata++ ;
1696             g = *srcdata++ ;
1697             b = *srcdata++ ;
1698
1699             if ( colour == wxColour( r , g , b ) )
1700                 *destdata++ = 0xFF ;
1701             else
1702                 *destdata++ = 0x00 ;
1703         }
1704     }
1705
1706     m_memBuf.UngetWriteBuf( size ) ;
1707     RealizeNative() ;
1708
1709     return true;
1710 }
1711
1712 WXHBITMAP wxMask::GetHBITMAP() const
1713 {
1714     return m_maskBitmap ;
1715 }
1716
1717 // ----------------------------------------------------------------------------
1718 // Standard Handlers
1719 // ----------------------------------------------------------------------------
1720
1721 class WXDLLEXPORT wxBundleResourceHandler: public wxBitmapHandler
1722 {
1723     DECLARE_ABSTRACT_CLASS(wxPNGResourceHandler)
1724
1725 public:
1726     inline wxBundleResourceHandler()
1727     {
1728     };
1729
1730     virtual bool LoadFile(wxBitmap *bitmap,
1731                           const wxString& name,
1732                           wxBitmapType type,
1733                           int desiredWidth,
1734                           int desiredHeight);
1735 };
1736
1737 IMPLEMENT_ABSTRACT_CLASS(wxBundleResourceHandler, wxBitmapHandler);
1738
1739 class WXDLLEXPORT wxPNGResourceHandler: public wxBundleResourceHandler
1740 {
1741     DECLARE_DYNAMIC_CLASS(wxPNGResourceHandler)
1742
1743 public:
1744     inline wxPNGResourceHandler()
1745     {
1746         SetName(wxT("PNG resource"));
1747         SetExtension("PNG");
1748         SetType(wxBITMAP_TYPE_PNG_RESOURCE);
1749     };
1750 };
1751
1752 IMPLEMENT_DYNAMIC_CLASS(wxPNGResourceHandler, wxBundleResourceHandler)
1753
1754 class WXDLLEXPORT wxJPEGResourceHandler: public wxBundleResourceHandler
1755 {
1756     DECLARE_DYNAMIC_CLASS(wxPNGResourceHandler)
1757
1758 public:
1759     inline wxJPEGResourceHandler()
1760     {
1761         SetName(wxT("JPEG resource"));
1762         SetExtension("JPEG");
1763         SetType(wxBITMAP_TYPE_JPEG_RESOURCE);
1764     };
1765 };
1766
1767 IMPLEMENT_DYNAMIC_CLASS(wxJPEGResourceHandler, wxBundleResourceHandler)
1768
1769 bool wxBundleResourceHandler::LoadFile(wxBitmap *bitmap,
1770                                      const wxString& name,
1771                                      wxBitmapType WXUNUSED(type),
1772                                      int WXUNUSED(desiredWidth),
1773                                      int WXUNUSED(desiredHeight))
1774 {
1775     wxString ext = GetExtension().Lower();
1776     wxCFStringRef resname(name);
1777     wxCFStringRef restype(ext);
1778
1779     wxCFRef<CFURLRef> imageURL(CFBundleCopyResourceURL(CFBundleGetMainBundle(), resname, restype, NULL));
1780
1781     if ( imageURL.get() != NULL )
1782     {
1783         // Create the data provider object
1784         wxCFRef<CGDataProviderRef> provider(CGDataProviderCreateWithURL (imageURL) );
1785         CGImageRef image = NULL;
1786
1787         if ( ext == "jpeg" )
1788             image = CGImageCreateWithJPEGDataProvider (provider, NULL, true,
1789                                                    kCGRenderingIntentDefault);
1790         else if ( ext == "png" )
1791             image = CGImageCreateWithPNGDataProvider (provider, NULL, true,
1792                                                        kCGRenderingIntentDefault);
1793         if ( image != NULL )
1794         {
1795             bitmap->Create(image);
1796             CGImageRelease(image);
1797         }
1798     }
1799
1800     return false ;
1801 }
1802
1803 #if !defined( __LP64__ ) && !defined(__WXOSX_IPHONE__)
1804
1805 class WXDLLEXPORT wxPICTResourceHandler: public wxBitmapHandler
1806 {
1807     DECLARE_DYNAMIC_CLASS(wxPICTResourceHandler)
1808
1809 public:
1810     inline wxPICTResourceHandler()
1811     {
1812         SetName(wxT("Macintosh Pict resource"));
1813         SetExtension(wxEmptyString);
1814         SetType(wxBITMAP_TYPE_PICT_RESOURCE);
1815     };
1816
1817     virtual bool LoadFile(wxBitmap *bitmap,
1818                           const wxString& name,
1819                           wxBitmapType type,
1820                           int desiredWidth,
1821                           int desiredHeight);
1822 };
1823
1824 IMPLEMENT_DYNAMIC_CLASS(wxPICTResourceHandler, wxBitmapHandler)
1825
1826
1827 bool wxPICTResourceHandler::LoadFile(wxBitmap *bitmap,
1828                                      const wxString& name,
1829                                      wxBitmapType WXUNUSED(type),
1830                                      int WXUNUSED(desiredWidth),
1831                                      int WXUNUSED(desiredHeight))
1832 {
1833 #if wxUSE_METAFILE
1834     Str255 theName ;
1835     wxMacStringToPascal( name , theName ) ;
1836
1837     PicHandle thePict = (PicHandle ) GetNamedResource( 'PICT' , theName ) ;
1838     if ( thePict )
1839     {
1840         wxMetafile mf ;
1841
1842         mf.SetPICT( thePict ) ;
1843         bitmap->Create( mf.GetWidth() , mf.GetHeight() ) ;
1844         wxMemoryDC dc ;
1845         dc.SelectObject( *bitmap ) ;
1846         mf.Play( &dc ) ;
1847         dc.SelectObject( wxNullBitmap ) ;
1848
1849         return true ;
1850     }
1851 #endif
1852
1853     return false ;
1854 }
1855 #endif
1856
1857 void wxBitmap::InitStandardHandlers()
1858 {
1859 #if !defined( __LP64__ ) && !defined(__WXOSX_IPHONE__)
1860     AddHandler( new wxPICTResourceHandler ) ;
1861 #endif
1862 #if wxOSX_USE_COCOA_OR_CARBON
1863     AddHandler( new wxICONResourceHandler ) ;
1864 #endif
1865     AddHandler( new wxPNGResourceHandler );
1866     AddHandler( new wxJPEGResourceHandler );
1867 }
1868
1869 // ----------------------------------------------------------------------------
1870 // raw bitmap access support
1871 // ----------------------------------------------------------------------------
1872
1873 void *wxBitmap::GetRawData(wxPixelDataBase& data, int WXUNUSED(bpp))
1874 {
1875     if ( !IsOk() )
1876         // no bitmap, no data (raw or otherwise)
1877         return NULL;
1878
1879     data.m_width = GetWidth() ;
1880     data.m_height = GetHeight() ;
1881     data.m_stride = GetBitmapData()->GetBytesPerRow() ;
1882
1883     return BeginRawAccess() ;
1884 }
1885
1886 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(dataBase))
1887 {
1888     EndRawAccess() ;
1889 }
1890
1891 void wxBitmap::UseAlpha()
1892 {
1893     // remember that we are using alpha channel:
1894     // we'll need to create a proper mask in UngetRawData()
1895     M_BITMAPDATA->UseAlpha( true );
1896 }