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( m_width * 4 ) ;
 291     size_t size = m_bytesPerRow * m_height ;
 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 0
 643             // in order for this code to work properly, wxMask would have to invert black and white
 644             // in the native bitmap
 645             if ( m_bitmapMask )
 646             {
 647                 CGImageRef tempImage = CGBitmapContextCreateImage( m_hBitmap );
 648                 CGImageRef tempMask = CGBitmapContextCreateImage((CGContextRef) m_bitmapMask->GetHBITMAP() );
 649                 image = CGImageCreateWithMask( tempImage, tempMask );
 650                 CGImageRelease(tempMask);
 651                 CGImageRelease(tempImage);
 652             }
 653             else
 654 #endif
 655                 image = CGBitmapContextCreateImage( m_hBitmap );
 656         }
 657         else
 658         {
 659             size_t imageSize = m_height * m_bytesPerRow ;
 660             void * dataBuffer = m_memBuf.GetData() ;
 661             int w = m_width ;
 662             int h = m_height ;
 663             CGImageAlphaInfo alphaInfo = kCGImageAlphaNoneSkipFirst ;
 664             wxMemoryBuffer membuf;
 665
 666             if ( m_bitmapMask )
 667             {
 668                 alphaInfo = kCGImageAlphaFirst ;
 669                 unsigned char *destalphastart = (unsigned char*) membuf.GetWriteBuf( imageSize ) ;
 670                 memcpy( destalphastart , dataBuffer , imageSize ) ;
 671                 unsigned char *sourcemaskstart = (unsigned char *) m_bitmapMask->GetRawAccess() ;
 672                 int maskrowbytes = m_bitmapMask->GetBytesPerRow() ;
 673                 for ( int y = 0 ; y < h ; ++y , destalphastart += m_bytesPerRow, sourcemaskstart += maskrowbytes)
 674                 {
 675                     unsigned char *sourcemask = sourcemaskstart ;
 676                     unsigned char *destalpha = destalphastart ;
 677                     for ( int x = 0 ; x < w ; ++x , sourcemask += kMaskBytesPerPixel , destalpha += 4 )
 678                     {
 679                         *destalpha = 0xFF - *sourcemask ;
 680                     }
 681                 }
 682                 membuf.UngetWriteBuf( imageSize );
 683             }
 684             else
 685             {
 686                 if ( m_hasAlpha )
 687                 {
 688 #if wxOSX_USE_PREMULTIPLIED_ALPHA
 689                     alphaInfo = kCGImageAlphaPremultipliedFirst ;
 690 #else
 691                     alphaInfo = kCGImageAlphaFirst ;
 692 #endif
 693                 }
 694
 695                 membuf = m_memBuf;
 696             }
 697
 698             CGDataProviderRef dataProvider = NULL ;
 699             if ( m_depth == 1 )
 700             {
 701                 // TODO CHECK ALIGNMENT
 702                 wxMemoryBuffer maskBuf;
 703                 unsigned char * maskBufData = (unsigned char*) maskBuf.GetWriteBuf( m_width * m_height );
 704                 unsigned char * bufData = (unsigned char *) membuf.GetData() ;
 705                 // copy one color component
 706                 size_t i = 0;
 707                 for( int y = 0 ; y < m_height ; bufData+= m_bytesPerRow, ++y )
 708                 {
 709                     unsigned char *bufDataIter = bufData+3;
 710                     for ( int x = 0 ; x < m_width ; bufDataIter += 4, ++x, ++i )
 711                     {
 712                         maskBufData[i] = *bufDataIter;
 713                     }
 714                 }
 715                 maskBuf.UngetWriteBuf( m_width * m_height );
 716
 717                 dataProvider =
 718                     wxMacCGDataProviderCreateWithMemoryBuffer( maskBuf );
 719
 720                 image = ::CGImageMaskCreate( w, h, 8, 8, m_width , dataProvider, NULL, false );
 721             }
 722             else
 723             {
 724                 CGColorSpaceRef colorSpace = wxMacGetGenericRGBColorSpace();
 725                 dataProvider = wxMacCGDataProviderCreateWithMemoryBuffer( membuf );
 726                 image =
 727                     ::CGImageCreate(
 728                                     w, h, 8 , 32 , m_bytesPerRow , colorSpace, alphaInfo ,
 729                                     dataProvider, NULL , false , kCGRenderingIntentDefault );
 730             }
 731             CGDataProviderRelease( dataProvider);
 732         }
 733     }
 734     else
 735     {
 736         image = m_cgImageRef ;
 737         CGImageRetain( image ) ;
 738     }
 739
 740     if ( m_rawAccessCount == 0 && m_cgImageRef == NULL)
 741     {
 742         // we keep it for later use
 743         m_cgImageRef = image ;
 744         CGImageRetain( image ) ;
 745     }
 746
 747     return image ;
 748 }
 749
 750 CGContextRef wxBitmapRefData::GetBitmapContext() const
 751 {
 752     return m_hBitmap;
 753 }
 754
 755 void wxBitmapRefData::Free()
 756 {
 757     wxASSERT_MSG( m_rawAccessCount == 0 , wxT("Bitmap still selected when destroyed") ) ;
 758
 759     if ( m_cgImageRef )
 760     {
 761         CGImageRelease( m_cgImageRef ) ;
 762         m_cgImageRef = NULL ;
 763     }
 764 #ifndef __WXOSX_IPHONE__
 765     if ( m_iconRef )
 766     {
 767         ReleaseIconRef( m_iconRef ) ;
 768         m_iconRef = NULL ;
 769     }
 770
 771 #ifndef __LP64__
 772     if ( m_pictHandle )
 773     {
 774         KillPicture( m_pictHandle ) ;
 775         m_pictHandle = NULL ;
 776     }
 777 #endif
 778 #endif
 779     if ( m_hBitmap )
 780     {
 781         CGContextRelease(m_hBitmap);
 782         m_hBitmap = NULL ;
 783     }
 784
 785     if (m_bitmapMask)
 786     {
 787         delete m_bitmapMask;
 788         m_bitmapMask = NULL;
 789     }
 790 }
 791
 792 wxBitmapRefData::~wxBitmapRefData()
 793 {
 794     Free() ;
 795 }
 796
 797
 798
 799 // ----------------------------------------------------------------------------
 800 // wxBitmap
 801 // ----------------------------------------------------------------------------
 802
 803 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 804 {
 805     bool created = false ;
 806     int w = icon.GetWidth() ;
 807     int h = icon.GetHeight() ;
 808
 809     Create( w , h ) ;
 810 #ifdef __WXOSX_CARBON__
 811     if ( w == h && ( w == 16 || w == 32 || w == 48 || w == 128 ) )
 812     {
 813         IconFamilyHandle iconFamily = NULL ;
 814         Handle imagehandle = NewHandle( 0 ) ;
 815         Handle maskhandle = NewHandle( 0 ) ;
 816
 817         OSType maskType = 0;
 818         OSType dataType = 0;
 819         IconSelectorValue selector = 0 ;
 820
 821         switch (w)
 822         {
 823             case 128:
 824                 dataType = kThumbnail32BitData ;
 825                 maskType = kThumbnail8BitMask ;
 826                 selector = kSelectorAllAvailableData ;
 827                 break;
 828
 829             case 48:
 830                 dataType = kHuge32BitData ;
 831                 maskType = kHuge8BitMask ;
 832                 selector = kSelectorHuge32Bit | kSelectorHuge8BitMask ;
 833                 break;
 834
 835             case 32:
 836                 dataType = kLarge32BitData ;
 837                 maskType = kLarge8BitMask ;
 838                 selector = kSelectorLarge32Bit | kSelectorLarge8BitMask ;
 839                 break;
 840
 841             case 16:
 842                 dataType = kSmall32BitData ;
 843                 maskType = kSmall8BitMask ;
 844                 selector = kSelectorSmall32Bit | kSelectorSmall8BitMask ;
 845                 break;
 846
 847             default:
 848                 break;
 849         }
 850
 851         OSStatus err = IconRefToIconFamily( MAC_WXHICON(icon.GetHICON()) , selector , &iconFamily ) ;
 852
 853         err = GetIconFamilyData( iconFamily , dataType , imagehandle ) ;
 854         err = GetIconFamilyData( iconFamily , maskType , maskhandle ) ;
 855         size_t imagehandlesize = GetHandleSize( imagehandle ) ;
 856         size_t maskhandlesize = GetHandleSize( maskhandle ) ;
 857
 858         if ( imagehandlesize != 0 && maskhandlesize != 0 )
 859         {
 860             wxASSERT( GetHandleSize( imagehandle ) == w * 4 * h ) ;
 861             wxASSERT( GetHandleSize( maskhandle ) == w * h ) ;
 862
 863             UseAlpha() ;
 864
 865             unsigned char *source = (unsigned char *) *imagehandle ;
 866             unsigned char *sourcemask = (unsigned char *) *maskhandle ;
 867             unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 868
 869             for ( int y = 0 ; y < h ; ++y )
 870             {
 871                 for ( int x = 0 ; x < w ; ++x )
 872                 {
 873                     unsigned char a = *sourcemask++;
 874                     *destination++ = a;
 875                     source++ ;
 876 #if wxOSX_USE_PREMULTIPLIED_ALPHA
 877                     *destination++ = ( (*source++) * a + 127 ) / 255;
 878                     *destination++ = ( (*source++) * a + 127 ) / 255;
 879                     *destination++ = ( (*source++) * a + 127 ) / 255;
 880 #else
 881                     *destination++ = *source++ ;
 882                     *destination++ = *source++ ;
 883                     *destination++ = *source++ ;
 884 #endif
 885                 }
 886             }
 887
 888             EndRawAccess() ;
 889             DisposeHandle( imagehandle ) ;
 890             DisposeHandle( maskhandle ) ;
 891             created = true ;
 892         }
 893
 894         DisposeHandle( (Handle) iconFamily ) ;
 895     }
 896 #endif
 897     if ( !created )
 898     {
 899         wxMemoryDC dc ;
 900         dc.SelectObject( *this ) ;
 901         dc.DrawIcon( icon , 0 , 0 ) ;
 902         dc.SelectObject( wxNullBitmap ) ;
 903     }
 904
 905     return true;
 906 }
 907
 908 wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
 909 {
 910     wxBitmapRefData* bitmapRefData;
 911
 912     m_refData = bitmapRefData = new wxBitmapRefData( the_width , the_height , no_bits ) ;
 913
 914     if (bitmapRefData->IsOk())
 915     {
 916         if ( no_bits == 1 )
 917         {
 918             int linesize = ( the_width / (sizeof(unsigned char) * 8)) ;
 919             if ( the_width % (sizeof(unsigned char) * 8) )
 920                 linesize += sizeof(unsigned char);
 921
 922             unsigned char* linestart = (unsigned char*) bits ;
 923             unsigned char* destptr = (unsigned char*) BeginRawAccess() ;
 924
 925             for ( int y = 0 ; y < the_height ; ++y , linestart += linesize, destptr += M_BITMAPDATA->GetBytesPerRow() )
 926             {
 927                 unsigned char* destination = destptr;
 928                 int index, bit, mask;
 929
 930                 for ( int x = 0 ; x < the_width ; ++x )
 931                 {
 932                     index = x / 8 ;
 933                     bit = x % 8 ;
 934                     mask = 1 << bit ;
 935
 936                     if ( linestart[index] & mask )
 937                     {
 938                         *destination++ = 0xFF ;
 939                         *destination++ = 0 ;
 940                         *destination++ = 0 ;
 941                         *destination++ = 0 ;
 942                     }
 943                     else
 944                     {
 945                         *destination++ = 0xFF ;
 946                         *destination++ = 0xFF ;
 947                         *destination++ = 0xFF ;
 948                         *destination++ = 0xFF ;
 949                     }
 950                 }
 951             }
 952
 953             EndRawAccess() ;
 954         }
 955         else
 956         {
 957             wxFAIL_MSG(wxT("multicolor BITMAPs not yet implemented"));
 958         }
 959     } /* bitmapRefData->IsOk() */
 960 }
 961
 962 wxBitmap::wxBitmap(const void* data, wxBitmapType type, int width, int height, int depth)
 963 {
 964     (void) Create(data, type, width, height, depth);
 965 }
 966
 967 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
 968 {
 969     LoadFile(filename, type);
 970 }
 971
 972 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 973 {
 974     return new wxBitmapRefData;
 975 }
 976
 977 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 978 {
 979     return new wxBitmapRefData(*static_cast<const wxBitmapRefData *>(data));
 980 }
 981
 982 void * wxBitmap::GetRawAccess() const
 983 {
 984     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 985
 986     return M_BITMAPDATA->GetRawAccess() ;
 987 }
 988
 989 void * wxBitmap::BeginRawAccess()
 990 {
 991     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 992
 993     return M_BITMAPDATA->BeginRawAccess() ;
 994 }
 995
 996 void wxBitmap::EndRawAccess()
 997 {
 998     wxCHECK_RET( Ok() , wxT("invalid bitmap") ) ;
 999
1000     M_BITMAPDATA->EndRawAccess() ;
1001 }
1002
1003 CGImageRef wxBitmap::CreateCGImage() const
1004 {
1005     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
1006
1007     return M_BITMAPDATA->CreateCGImage() ;
1008 }
1009
1010 #ifndef  __WXOSX_IPHONE__
1011 IconRef wxBitmap::GetIconRef() const
1012 {
1013     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
1014
1015     return M_BITMAPDATA->GetIconRef() ;
1016 }
1017
1018 IconRef wxBitmap::CreateIconRef() const
1019 {
1020     IconRef icon = GetIconRef();
1021     verify_noerr( AcquireIconRef(icon) );
1022     return icon;
1023 }
1024 #endif
1025
1026 #if wxOSX_USE_COCOA
1027
1028 WX_NSImage wxBitmap::GetNSImage() const
1029 {
1030     wxCFRef< CGImageRef > cgimage(CreateCGImage());
1031     return wxOSXGetNSImageFromCGImage( cgimage );
1032 }
1033
1034 #endif
1035
1036 #if wxOSX_USE_IPHONE
1037
1038 WX_UIImage wxBitmap::GetUIImage() const
1039 {
1040     wxCFRef< CGImageRef > cgimage(CreateCGImage());
1041     return wxOSXGetUIImageFromCGImage( cgimage );
1042 }
1043
1044 #endif
1045 wxBitmap wxBitmap::GetSubBitmap(const wxRect &rect) const
1046 {
1047     wxCHECK_MSG( Ok() &&
1048                 (rect.x >= 0) && (rect.y >= 0) &&
1049                 (rect.x+rect.width <= GetWidth()) &&
1050                 (rect.y+rect.height <= GetHeight()),
1051                 wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1052
1053     wxBitmap ret( rect.width, rect.height, GetDepth() );
1054     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1055
1056     int destwidth = rect.width ;
1057     int destheight = rect.height ;
1058
1059     {
1060         unsigned char *sourcedata = (unsigned char*) GetRawAccess() ;
1061         unsigned char *destdata = (unsigned char*) ret.BeginRawAccess() ;
1062         wxASSERT( (sourcedata != NULL) && (destdata != NULL) ) ;
1063
1064         int sourcelinesize = GetBitmapData()->GetBytesPerRow() ;
1065         int destlinesize = ret.GetBitmapData()->GetBytesPerRow() ;
1066         unsigned char *source = sourcedata + rect.x * 4 + rect.y * sourcelinesize ;
1067         unsigned char *dest = destdata ;
1068
1069         for (int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
1070         {
1071             memcpy( dest , source , destlinesize ) ;
1072         }
1073     }
1074
1075     ret.EndRawAccess() ;
1076
1077     if ( M_BITMAPDATA->m_bitmapMask )
1078     {
1079         wxMemoryBuffer maskbuf ;
1080         int rowBytes = GetBestBytesPerRow( destwidth * kMaskBytesPerPixel );
1081         size_t maskbufsize = rowBytes * destheight ;
1082
1083         int sourcelinesize = M_BITMAPDATA->m_bitmapMask->GetBytesPerRow() ;
1084         int destlinesize = rowBytes ;
1085
1086         unsigned char *source = (unsigned char *) M_BITMAPDATA->m_bitmapMask->GetRawAccess() ;
1087         unsigned char *destdata = (unsigned char * ) maskbuf.GetWriteBuf( maskbufsize ) ;
1088         wxASSERT( (source != NULL) && (destdata != NULL) ) ;
1089
1090         source += rect.x * kMaskBytesPerPixel + rect.y * sourcelinesize ;
1091         unsigned char *dest = destdata ;
1092
1093         for (int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
1094         {
1095             memcpy( dest , source , destlinesize ) ;
1096         }
1097
1098         maskbuf.UngetWriteBuf( maskbufsize ) ;
1099         ret.SetMask( new wxMask( maskbuf , destwidth , destheight , rowBytes ) ) ;
1100     }
1101     else if ( HasAlpha() )
1102         ret.UseAlpha() ;
1103
1104     return ret;
1105 }
1106
1107 bool wxBitmap::Create(int w, int h, int d)
1108 {
1109     UnRef();
1110
1111     if ( d < 0 )
1112         d = wxDisplayDepth() ;
1113
1114     m_refData = new wxBitmapRefData( w , h , d );
1115
1116     return M_BITMAPDATA->IsOk() ;
1117 }
1118
1119 bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
1120 {
1121     UnRef();
1122
1123     wxBitmapHandler *handler = FindHandler(type);
1124
1125     if ( handler )
1126     {
1127         m_refData = new wxBitmapRefData;
1128
1129         return handler->LoadFile(this, filename, type, -1, -1);
1130     }
1131     else
1132     {
1133 #if wxUSE_IMAGE
1134         wxImage loadimage(filename, type);
1135         if (loadimage.Ok())
1136         {
1137             *this = loadimage;
1138
1139             return true;
1140         }
1141 #endif
1142     }
1143
1144     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1145
1146     return false;
1147 }
1148
1149 bool wxBitmap::Create(const void* data, wxBitmapType type, int width, int height, int depth)
1150 {
1151     UnRef();
1152
1153     m_refData = new wxBitmapRefData;
1154
1155     wxBitmapHandler *handler = FindHandler(type);
1156
1157     if ( handler == NULL )
1158     {
1159         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1160
1161         return false;
1162     }
1163
1164     return handler->Create(this, data, type, width, height, depth);
1165 }
1166
1167 #if wxUSE_IMAGE
1168
1169 wxBitmap::wxBitmap(const wxImage& image, int depth)
1170 {
1171     wxCHECK_RET( image.Ok(), wxT("invalid image") );
1172
1173     // width and height of the device-dependent bitmap
1174     int width = image.GetWidth();
1175     int height = image.GetHeight();
1176
1177     wxBitmapRefData* bitmapRefData;
1178
1179     m_refData = bitmapRefData = new wxBitmapRefData( width , height , depth ) ;
1180
1181     if ( bitmapRefData->IsOk())
1182     {
1183         // Create picture
1184
1185         bool hasAlpha = false ;
1186
1187         if ( image.HasMask() )
1188         {
1189             // takes precedence, don't mix with alpha info
1190         }
1191         else
1192         {
1193             hasAlpha = image.HasAlpha() ;
1194         }
1195
1196         if ( hasAlpha )
1197             UseAlpha() ;
1198
1199         unsigned char* destinationstart = (unsigned char*) BeginRawAccess() ;
1200         register unsigned char* data = image.GetData();
1201         if ( destinationstart != NULL && data != NULL )
1202         {
1203             const unsigned char *alpha = hasAlpha ? image.GetAlpha() : NULL ;
1204             for (int y = 0; y < height; destinationstart += M_BITMAPDATA->GetBytesPerRow(), y++)
1205             {
1206                 unsigned char * destination = destinationstart;
1207                 for (int x = 0; x < width; x++)
1208                 {
1209                     if ( hasAlpha )
1210                     {
1211                         const unsigned char a = *alpha++;
1212                         *destination++ = a ;
1213
1214     #if wxOSX_USE_PREMULTIPLIED_ALPHA
1215                         *destination++ = ((*data++) * a + 127) / 255 ;
1216                         *destination++ = ((*data++) * a + 127) / 255 ;
1217                         *destination++ = ((*data++) * a + 127) / 255 ;
1218     #else
1219                         *destination++ = *data++ ;
1220                         *destination++ = *data++ ;
1221                         *destination++ = *data++ ;
1222     #endif
1223                     }
1224                     else
1225                     {
1226                         *destination++ = 0xFF ;
1227                         *destination++ = *data++ ;
1228                         *destination++ = *data++ ;
1229                         *destination++ = *data++ ;
1230                     }
1231                 }
1232             }
1233
1234             EndRawAccess() ;
1235         }
1236         if ( image.HasMask() )
1237             SetMask( new wxMask( *this , wxColour( image.GetMaskRed() , image.GetMaskGreen() , image.GetMaskBlue() ) ) ) ;
1238     } /* bitmapRefData->IsOk() */
1239 }
1240
1241 wxImage wxBitmap::ConvertToImage() const
1242 {
1243     wxImage image;
1244
1245     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
1246
1247     // create an wxImage object
1248     int width = GetWidth();
1249     int height = GetHeight();
1250     image.Create( width, height );
1251
1252     unsigned char *data = image.GetData();
1253     wxCHECK_MSG( data, wxNullImage, wxT("Could not allocate data for image") );
1254
1255     unsigned char* sourcestart = (unsigned char*) GetRawAccess() ;
1256
1257     bool hasAlpha = false ;
1258     bool hasMask = false ;
1259     int maskBytesPerRow = 0 ;
1260     unsigned char *alpha = NULL ;
1261     unsigned char *mask = NULL ;
1262
1263     if ( HasAlpha() )
1264         hasAlpha = true ;
1265
1266     if ( GetMask() )
1267     {
1268         hasMask = true ;
1269         mask = (unsigned char*) GetMask()->GetRawAccess() ;
1270         maskBytesPerRow = GetMask()->GetBytesPerRow() ;
1271     }
1272
1273     if ( hasAlpha )
1274     {
1275         image.SetAlpha() ;
1276         alpha = image.GetAlpha() ;
1277     }
1278
1279     int index = 0;
1280
1281     // The following masking algorithm is the same as well in msw/gtk:
1282     // the colour used as transparent one in wxImage and the one it is
1283     // replaced with when it actually occurs in the bitmap
1284     static const int MASK_RED = 1;
1285     static const int MASK_GREEN = 2;
1286     static const int MASK_BLUE = 3;
1287     static const int MASK_BLUE_REPLACEMENT = 2;
1288
1289     for (int yy = 0; yy < height; yy++ , sourcestart += M_BITMAPDATA->GetBytesPerRow() , mask += maskBytesPerRow )
1290     {
1291         unsigned char * maskp = mask ;
1292         unsigned char * source = sourcestart;
1293         unsigned char a, r, g, b;
1294         long color;
1295
1296         for (int xx = 0; xx < width; xx++)
1297         {
1298             color = *((long*) source) ;
1299 #ifdef WORDS_BIGENDIAN
1300             a = ((color&0xFF000000) >> 24) ;
1301             r = ((color&0x00FF0000) >> 16) ;
1302             g = ((color&0x0000FF00) >> 8) ;
1303             b = (color&0x000000FF);
1304 #else
1305             b = ((color&0xFF000000) >> 24) ;
1306             g = ((color&0x00FF0000) >> 16) ;
1307             r = ((color&0x0000FF00) >> 8) ;
1308             a = (color&0x000000FF);
1309 #endif
1310             if ( hasMask )
1311             {
1312                 if ( *maskp++ == 0xFF )
1313                 {
1314                     r = MASK_RED ;
1315                     g = MASK_GREEN ;
1316                     b = MASK_BLUE ;
1317                 }
1318                 else if ( r == MASK_RED && g == MASK_GREEN && b == MASK_BLUE )
1319                     b = MASK_BLUE_REPLACEMENT ;
1320             }
1321             else if ( hasAlpha )
1322             {
1323                 *alpha++ = a ;
1324 #if wxOSX_USE_PREMULTIPLIED_ALPHA
1325                 // this must be non-premultiplied data
1326                 if ( a != 0xFF && a!= 0 )
1327                 {
1328                     r = r * 255 / a;
1329                     g = g * 255 / a;
1330                     b = b * 255 / a;
1331                 }
1332 #endif
1333             }
1334
1335             data[index    ] = r ;
1336             data[index + 1] = g ;
1337             data[index + 2] = b ;
1338
1339             index += 3;
1340             source += 4 ;
1341         }
1342     }
1343
1344     if ( hasMask )
1345         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1346
1347     return image;
1348 }
1349
1350 #endif //wxUSE_IMAGE
1351
1352 bool wxBitmap::SaveFile( const wxString& filename,
1353     wxBitmapType type, const wxPalette *palette ) const
1354 {
1355     bool success = false;
1356     wxBitmapHandler *handler = FindHandler(type);
1357
1358     if ( handler )
1359     {
1360         success = handler->SaveFile(this, filename, type, palette);
1361     }
1362     else
1363     {
1364 #if wxUSE_IMAGE
1365         wxImage image = ConvertToImage();
1366         success = image.SaveFile(filename, type);
1367 #else
1368         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1369 #endif
1370     }
1371
1372     return success;
1373 }
1374
1375 int wxBitmap::GetHeight() const
1376 {
1377    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1378
1379    return M_BITMAPDATA->GetHeight();
1380 }
1381
1382 int wxBitmap::GetWidth() const
1383 {
1384    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1385
1386    return M_BITMAPDATA->GetWidth() ;
1387 }
1388
1389 int wxBitmap::GetDepth() const
1390 {
1391    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1392
1393    return M_BITMAPDATA->GetDepth();
1394 }
1395
1396 wxMask *wxBitmap::GetMask() const
1397 {
1398    wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
1399
1400    return M_BITMAPDATA->m_bitmapMask;
1401 }
1402
1403 bool wxBitmap::HasAlpha() const
1404 {
1405    wxCHECK_MSG( Ok(), false , wxT("invalid bitmap") );
1406
1407    return M_BITMAPDATA->HasAlpha() ;
1408 }
1409
1410 void wxBitmap::SetWidth(int w)
1411 {
1412     AllocExclusive();
1413     M_BITMAPDATA->SetWidth(w);
1414 }
1415
1416 void wxBitmap::SetHeight(int h)
1417 {
1418     AllocExclusive();
1419     M_BITMAPDATA->SetHeight(h);
1420 }
1421
1422 void wxBitmap::SetDepth(int d)
1423 {
1424     AllocExclusive();
1425     M_BITMAPDATA->SetDepth(d);
1426 }
1427
1428 void wxBitmap::SetOk(bool isOk)
1429 {
1430     AllocExclusive();
1431     M_BITMAPDATA->SetOk(isOk);
1432 }
1433
1434 #if wxUSE_PALETTE
1435 wxPalette *wxBitmap::GetPalette() const
1436 {
1437    wxCHECK_MSG( Ok(), NULL, wxT("Invalid bitmap  GetPalette()") );
1438
1439    return &M_BITMAPDATA->m_bitmapPalette;
1440 }
1441
1442 void wxBitmap::SetPalette(const wxPalette& palette)
1443 {
1444     AllocExclusive();
1445     M_BITMAPDATA->m_bitmapPalette = palette ;
1446 }
1447 #endif // wxUSE_PALETTE
1448
1449 void wxBitmap::SetMask(wxMask *mask)
1450 {
1451     AllocExclusive();
1452     // Remove existing mask if there is one.
1453     delete M_BITMAPDATA->m_bitmapMask;
1454
1455     M_BITMAPDATA->m_bitmapMask = mask ;
1456 }
1457
1458 WXHBITMAP wxBitmap::GetHBITMAP(WXHBITMAP* mask) const
1459 {
1460     wxUnusedVar(mask);
1461
1462     return WXHBITMAP(M_BITMAPDATA->GetBitmapContext());
1463 }
1464
1465 // ----------------------------------------------------------------------------
1466 // wxMask
1467 // ----------------------------------------------------------------------------
1468
1469 wxMask::wxMask()
1470 {
1471     Init() ;
1472 }
1473
1474 wxMask::wxMask(const wxMask &tocopy)
1475 {
1476     Init();
1477
1478     m_bytesPerRow = tocopy.m_bytesPerRow;
1479     m_width = tocopy.m_width;
1480     m_height = tocopy.m_height;
1481
1482     size_t size = m_bytesPerRow * m_height;
1483     unsigned char* dest = (unsigned char*)m_memBuf.GetWriteBuf( size );
1484     unsigned char* source = (unsigned char*)tocopy.m_memBuf.GetData();
1485     memcpy( dest, source, size );
1486     m_memBuf.UngetWriteBuf( size ) ;
1487     RealizeNative() ;
1488 }
1489
1490 // Construct a mask from a bitmap and a colour indicating
1491 // the transparent area
1492 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
1493 {
1494     Init() ;
1495     Create( bitmap, colour );
1496 }
1497
1498 // Construct a mask from a mono bitmap (copies the bitmap).
1499 wxMask::wxMask( const wxBitmap& bitmap )
1500 {
1501     Init() ;
1502     Create( bitmap );
1503 }
1504
1505 // Construct a mask from a mono bitmap (copies the bitmap).
1506
1507 wxMask::wxMask( const wxMemoryBuffer& data, int width , int height , int bytesPerRow )
1508 {
1509     Init() ;
1510     Create( data, width , height , bytesPerRow );
1511 }
1512
1513 wxMask::~wxMask()
1514 {
1515     if ( m_maskBitmap )
1516     {
1517         CGContextRelease( (CGContextRef) m_maskBitmap );
1518         m_maskBitmap = NULL ;
1519     }
1520 }
1521
1522 void wxMask::Init()
1523 {
1524     m_width = m_height = m_bytesPerRow = 0 ;
1525     m_maskBitmap = NULL ;
1526 }
1527
1528 void *wxMask::GetRawAccess() const
1529 {
1530     return m_memBuf.GetData() ;
1531 }
1532
1533 // The default ColorTable for k8IndexedGrayPixelFormat in Intel appears to be broken, so we'll use an non-indexed
1534 // bitmap mask instead; in order to keep the code simple, the change applies to PowerPC implementations as well
1535
1536 void wxMask::RealizeNative()
1537 {
1538     if ( m_maskBitmap )
1539     {
1540         CGContextRelease( (CGContextRef) m_maskBitmap );
1541        m_maskBitmap = NULL ;
1542     }
1543
1544     CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceGray();
1545     // from MouseTracking sample :
1546     // Ironically, due to a bug in CGImageCreateWithMask, you cannot use
1547     // CGColorSpaceCreateWithName(kCGColorSpaceGenericGray) at this point!
1548
1549     m_maskBitmap = CGBitmapContextCreate((char*) m_memBuf.GetData(), m_width, m_height, 8, m_bytesPerRow, colorspace,
1550         kCGImageAlphaNone );
1551     CGColorSpaceRelease( colorspace );
1552     wxASSERT_MSG( m_maskBitmap , wxT("Unable to create CGBitmapContext context") ) ;
1553 }
1554
1555 // Create a mask from a mono bitmap (copies the bitmap).
1556
1557 bool wxMask::Create(const wxMemoryBuffer& data,int width , int height , int bytesPerRow)
1558 {
1559     m_memBuf = data ;
1560     m_width = width ;
1561     m_height = height ;
1562     m_bytesPerRow = bytesPerRow ;
1563
1564     wxASSERT( data.GetDataLen() == (size_t)(height * bytesPerRow) ) ;
1565
1566     RealizeNative() ;
1567
1568     return true ;
1569 }
1570
1571 // Create a mask from a mono bitmap (copies the bitmap).
1572 bool wxMask::Create(const wxBitmap& bitmap)
1573 {
1574     m_width = bitmap.GetWidth() ;
1575     m_height = bitmap.GetHeight() ;
1576     m_bytesPerRow = GetBestBytesPerRow( m_width * kMaskBytesPerPixel ) ;
1577
1578     size_t size = m_bytesPerRow * m_height ;
1579     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1580     wxASSERT( destdatabase != NULL ) ;
1581
1582     memset( destdatabase , 0 , size ) ;
1583     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1584
1585     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow )
1586     {
1587         unsigned char *destdata = destdatabase ;
1588         unsigned char r, g, b;
1589
1590         for ( int x = 0 ; x < m_width ; ++x )
1591         {
1592             srcdata++ ;
1593             r = *srcdata++ ;
1594             g = *srcdata++ ;
1595             b = *srcdata++ ;
1596
1597             if ( ( r + g + b ) > 0x10 )
1598                 *destdata++ = 0xFF ;
1599             else
1600                 *destdata++ = 0x00 ;
1601         }
1602     }
1603
1604     m_memBuf.UngetWriteBuf( size ) ;
1605     RealizeNative() ;
1606
1607     return true;
1608 }
1609
1610 // Create a mask from a bitmap and a colour indicating
1611 // the transparent area
1612 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1613 {
1614     m_width = bitmap.GetWidth() ;
1615     m_height = bitmap.GetHeight() ;
1616     m_bytesPerRow = GetBestBytesPerRow( m_width * kMaskBytesPerPixel ) ;
1617
1618     size_t size = m_bytesPerRow * m_height ;
1619     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1620     wxASSERT( destdatabase != NULL ) ;
1621
1622     memset( destdatabase , 0 , size ) ;
1623     unsigned char * srcdatabase = (unsigned char*) bitmap.GetRawAccess() ;
1624     size_t sourceBytesRow = bitmap.GetBitmapData()->GetBytesPerRow();
1625
1626     for ( int y = 0 ; y < m_height ; ++y , srcdatabase+= sourceBytesRow, destdatabase += m_bytesPerRow)
1627     {
1628         unsigned char *srcdata = srcdatabase ;
1629         unsigned char *destdata = destdatabase ;
1630         unsigned char r, g, b;
1631
1632         for ( int x = 0 ; x < m_width ; ++x )
1633         {
1634             srcdata++ ;
1635             r = *srcdata++ ;
1636             g = *srcdata++ ;
1637             b = *srcdata++ ;
1638
1639             if ( colour == wxColour( r , g , b ) )
1640                 *destdata++ = 0xFF ;
1641             else
1642                 *destdata++ = 0x00 ;
1643         }
1644     }
1645
1646     m_memBuf.UngetWriteBuf( size ) ;
1647     RealizeNative() ;
1648
1649     return true;
1650 }
1651
1652 WXHBITMAP wxMask::GetHBITMAP() const
1653 {
1654     return m_maskBitmap ;
1655 }
1656
1657 // ----------------------------------------------------------------------------
1658 // Standard Handlers
1659 // ----------------------------------------------------------------------------
1660
1661 #if !defined( __LP64__ ) && !defined(__WXOSX_IPHONE__)
1662
1663 class WXDLLEXPORT wxPICTResourceHandler: public wxBitmapHandler
1664 {
1665     DECLARE_DYNAMIC_CLASS(wxPICTResourceHandler)
1666
1667 public:
1668     inline wxPICTResourceHandler()
1669     {
1670         SetName(wxT("Macintosh Pict resource"));
1671         SetExtension(wxEmptyString);
1672         SetType(wxBITMAP_TYPE_PICT_RESOURCE);
1673     };
1674
1675     virtual bool LoadFile(wxBitmap *bitmap,
1676                           const wxString& name,
1677                           wxBitmapType type,
1678                           int desiredWidth,
1679                           int desiredHeight);
1680 };
1681
1682 IMPLEMENT_DYNAMIC_CLASS(wxPICTResourceHandler, wxBitmapHandler)
1683
1684
1685 bool wxPICTResourceHandler::LoadFile(wxBitmap *bitmap,
1686                                      const wxString& name,
1687                                      wxBitmapType WXUNUSED(type),
1688                                      int WXUNUSED(desiredWidth),
1689                                      int WXUNUSED(desiredHeight))
1690 {
1691 #if wxUSE_METAFILE
1692     Str255 theName ;
1693     wxMacStringToPascal( name , theName ) ;
1694
1695     PicHandle thePict = (PicHandle ) GetNamedResource( 'PICT' , theName ) ;
1696     if ( thePict )
1697     {
1698         wxMetafile mf ;
1699
1700         mf.SetPICT( thePict ) ;
1701         bitmap->Create( mf.GetWidth() , mf.GetHeight() ) ;
1702         wxMemoryDC dc ;
1703         dc.SelectObject( *bitmap ) ;
1704         mf.Play( &dc ) ;
1705         dc.SelectObject( wxNullBitmap ) ;
1706
1707         return true ;
1708     }
1709 #endif
1710
1711     return false ;
1712 }
1713 #endif
1714
1715 void wxBitmap::InitStandardHandlers()
1716 {
1717 #if !defined( __LP64__ ) && !defined(__WXOSX_IPHONE__)
1718     AddHandler( new wxPICTResourceHandler ) ;
1719 #endif
1720 #if wxOSX_USE_CARBON
1721     AddHandler( new wxICONResourceHandler ) ;
1722 #endif
1723 }
1724
1725 // ----------------------------------------------------------------------------
1726 // raw bitmap access support
1727 // ----------------------------------------------------------------------------
1728
1729 void *wxBitmap::GetRawData(wxPixelDataBase& data, int WXUNUSED(bpp))
1730 {
1731     if ( !Ok() )
1732         // no bitmap, no data (raw or otherwise)
1733         return NULL;
1734
1735     data.m_width = GetWidth() ;
1736     data.m_height = GetHeight() ;
1737     data.m_stride = GetBitmapData()->GetBytesPerRow() ;
1738
1739     return BeginRawAccess() ;
1740 }
1741
1742 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(dataBase))
1743 {
1744     EndRawAccess() ;
1745 }
1746
1747 void wxBitmap::UseAlpha()
1748 {
1749     // remember that we are using alpha channel:
1750     // we'll need to create a proper mask in UngetRawData()
1751     M_BITMAPDATA->UseAlpha( true );
1752 }