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 #ifndef __WXOSX_IPHONE__
 102     // caller should increase ref count if needed longer
 103     // than the bitmap exists
 104     IconRef       GetIconRef();
 105 #endif
 106
 107     CGContextRef  GetBitmapContext() const;
 108
 109     int           GetBytesPerRow() const { return m_bytesPerRow; }
 110     private :
 111     bool Create(int width , int height , int depth);
 112     bool Create( CGImageRef image );
 113     void Init();
 114
 115     int           m_width;
 116     int           m_height;
 117     int           m_bytesPerRow;
 118     int           m_depth;
 119     bool          m_hasAlpha;
 120     wxMemoryBuffer m_memBuf;
 121     int           m_rawAccessCount;
 122     bool          m_ok;
 123     mutable CGImageRef    m_cgImageRef;
 124
 125 #ifndef __WXOSX_IPHONE__
 126     IconRef       m_iconRef;
 127 #endif
 128
 129     CGContextRef  m_hBitmap;
 130 };
 131
 132
 133 #define wxOSX_USE_PREMULTIPLIED_ALPHA 1
 134 static const int kBestByteAlignement = 16;
 135 static const int kMaskBytesPerPixel = 1;
 136
 137 static int GetBestBytesPerRow( int rawBytes )
 138 {
 139     return (((rawBytes)+kBestByteAlignement-1) & ~(kBestByteAlignement-1) );
 140 }
 141
 142 #if wxUSE_GUI && !defined(__WXOSX_IPHONE__)
 143
 144 // this is used for more controls than just the wxBitmap button, also for notebooks etc
 145
 146 void wxMacCreateBitmapButton( ControlButtonContentInfo*info , const wxBitmap& bitmap , int forceType )
 147 {
 148     memset( info , 0 , sizeof(ControlButtonContentInfo) ) ;
 149     if ( bitmap.IsOk() )
 150     {
 151         wxBitmapRefData * bmap = bitmap.GetBitmapData() ;
 152         if ( bmap == NULL )
 153             return ;
 154
 155         if ( forceType == 0  )
 156         {
 157             forceType = kControlContentCGImageRef;
 158         }
 159
 160         if ( forceType == kControlContentIconRef )
 161         {
 162             wxBitmap scaleBmp ;
 163             wxBitmapRefData* bmp = bmap ;
 164
 165             if ( !bmap->HasNativeSize() )
 166             {
 167                 // as PICT conversion will only result in a 16x16 icon, let's attempt
 168                 // a few scales for better results
 169
 170                 int w = bitmap.GetWidth() ;
 171                 int h = bitmap.GetHeight() ;
 172                 int sz = wxMax( w , h ) ;
 173                 if ( sz == 24 || sz == 64 )
 174                 {
 175                     scaleBmp = wxBitmap( bitmap.ConvertToImage().Scale( w * 2 , h * 2 ) ) ;
 176                     bmp = scaleBmp.GetBitmapData() ;
 177                 }
 178             }
 179
 180             info->contentType = kControlContentIconRef ;
 181             info->u.iconRef = bmp->GetIconRef() ;
 182             AcquireIconRef( info->u.iconRef ) ;
 183         }
 184         else if ( forceType == kControlContentCGImageRef )
 185         {
 186             info->contentType = kControlContentCGImageRef ;
 187             info->u.imageRef = (CGImageRef) bmap->CreateCGImage() ;
 188         }
 189     }
 190 }
 191
 192 CGImageRef wxMacCreateCGImageFromBitmap( const wxBitmap& bitmap )
 193 {
 194     wxBitmapRefData * bmap = bitmap.GetBitmapData() ;
 195     if ( bmap == NULL )
 196         return NULL ;
 197     return (CGImageRef) bmap->CreateCGImage();
 198 }
 199
 200 void wxMacReleaseBitmapButton( ControlButtonContentInfo*info )
 201 {
 202     if ( info->contentType == kControlContentIconRef )
 203     {
 204         ReleaseIconRef( info->u.iconRef ) ;
 205     }
 206     else if ( info->contentType == kControlNoContent )
 207     {
 208         // there's no bitmap at all, fall through silently
 209     }
 210     else if ( info->contentType == kControlContentPictHandle )
 211     {
 212         // owned by the bitmap, no release here
 213     }
 214     else if ( info->contentType == kControlContentCGImageRef )
 215     {
 216         CGImageRelease( info->u.imageRef ) ;
 217     }
 218     else
 219     {
 220         wxFAIL_MSG(wxT("Unexpected bitmap type") ) ;
 221     }
 222 }
 223
 224 #endif //wxUSE_BMPBUTTON
 225
 226 #define M_BITMAPDATA ((wxBitmapRefData *)m_refData)
 227
 228 void wxBitmapRefData::Init()
 229 {
 230     m_width = 0 ;
 231     m_height = 0 ;
 232     m_depth = 0 ;
 233     m_bytesPerRow = 0;
 234     m_ok = false ;
 235     m_bitmapMask = NULL ;
 236     m_cgImageRef = NULL ;
 237
 238 #ifndef __WXOSX_IPHONE__
 239     m_iconRef = NULL ;
 240 #endif
 241     m_hBitmap = NULL ;
 242
 243     m_rawAccessCount = 0 ;
 244     m_hasAlpha = false;
 245 }
 246
 247 wxBitmapRefData::wxBitmapRefData(const wxBitmapRefData &tocopy) : wxGDIRefData()
 248 {
 249     Init();
 250     Create(tocopy.m_width, tocopy.m_height, tocopy.m_depth);
 251
 252     if (tocopy.m_bitmapMask)
 253         m_bitmapMask = new wxMask(*tocopy.m_bitmapMask);
 254     else if (tocopy.m_hasAlpha)
 255         UseAlpha(true);
 256
 257     unsigned char* dest = (unsigned char*)GetRawAccess();
 258     unsigned char* source = (unsigned char*)tocopy.GetRawAccess();
 259     size_t numbytes = m_bytesPerRow * m_height;
 260     memcpy( dest, source, numbytes );
 261 }
 262
 263 wxBitmapRefData::wxBitmapRefData()
 264 {
 265     Init() ;
 266 }
 267
 268 wxBitmapRefData::wxBitmapRefData( int w , int h , int d )
 269 {
 270     Init() ;
 271     Create( w , h , d ) ;
 272 }
 273
 274 wxBitmapRefData::wxBitmapRefData(CGImageRef image)
 275 {
 276     Init();
 277     Create( image );
 278 }
 279 // code from Technical Q&A QA1509
 280
 281 bool wxBitmapRefData::Create(CGImageRef image)
 282 {
 283     if ( image != NULL )
 284     {
 285         m_width = CGImageGetWidth(image);
 286         m_height = CGImageGetHeight(image);
 287         m_depth = 32;
 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             CGImageAlphaInfo alpha = CGImageGetAlphaInfo(image);
 298             if ( alpha == kCGImageAlphaNone || alpha == kCGImageAlphaNoneSkipFirst || alpha == kCGImageAlphaNoneSkipLast )
 299             {
 300                 m_hBitmap = CGBitmapContextCreate((char*) data, m_width, m_height, 8, m_bytesPerRow, wxMacGetGenericRGBColorSpace(), kCGImageAlphaNoneSkipFirst );
 301             }
 302             else
 303             {
 304                 m_hasAlpha = true;
 305                 m_hBitmap = CGBitmapContextCreate((char*) data, m_width, m_height, 8, m_bytesPerRow, wxMacGetGenericRGBColorSpace(), kCGImageAlphaPremultipliedFirst );
 306             }
 307             CGRect rect = CGRectMake(0,0,m_width,m_height);
 308             CGContextDrawImage(m_hBitmap, rect, image);
 309
 310             wxASSERT_MSG( m_hBitmap , wxT("Unable to create CGBitmapContext context") ) ;
 311             CGContextTranslateCTM( m_hBitmap, 0,  m_height );
 312             CGContextScaleCTM( m_hBitmap, 1, -1 );
 313         } /* data != NULL */
 314     }
 315     m_ok = ( m_hBitmap != NULL ) ;
 316
 317     return m_ok ;
 318
 319 }
 320
 321 bool wxBitmapRefData::Create( int w , int h , int d )
 322 {
 323     m_width = wxMax(1, w);
 324     m_height = wxMax(1, h);
 325     m_depth = d ;
 326     m_hBitmap = NULL ;
 327
 328     m_bytesPerRow = GetBestBytesPerRow( m_width * 4 ) ;
 329     size_t size = m_bytesPerRow * m_height ;
 330     void* data = m_memBuf.GetWriteBuf( size ) ;
 331     if ( data != NULL )
 332     {
 333         memset( data , 0 , size ) ;
 334         m_memBuf.UngetWriteBuf( size ) ;
 335
 336         m_hBitmap = CGBitmapContextCreate((char*) data, m_width, m_height, 8, m_bytesPerRow, wxMacGetGenericRGBColorSpace(), kCGImageAlphaNoneSkipFirst );
 337         wxASSERT_MSG( m_hBitmap , wxT("Unable to create CGBitmapContext context") ) ;
 338         CGContextTranslateCTM( m_hBitmap, 0,  m_height );
 339         CGContextScaleCTM( m_hBitmap, 1, -1 );
 340     } /* data != NULL */
 341     m_ok = ( m_hBitmap != NULL ) ;
 342
 343     return m_ok ;
 344 }
 345
 346 void wxBitmapRefData::UseAlpha( bool use )
 347 {
 348     if ( m_hasAlpha == use )
 349         return ;
 350
 351     m_hasAlpha = use ;
 352
 353     CGContextRelease( m_hBitmap );
 354     m_hBitmap = CGBitmapContextCreate((char*) m_memBuf.GetData(), m_width, m_height, 8, m_bytesPerRow, wxMacGetGenericRGBColorSpace(), m_hasAlpha ? kCGImageAlphaPremultipliedFirst : kCGImageAlphaNoneSkipFirst );
 355     wxASSERT_MSG( m_hBitmap , wxT("Unable to create CGBitmapContext context") ) ;
 356     CGContextTranslateCTM( m_hBitmap, 0,  m_height );
 357     CGContextScaleCTM( m_hBitmap, 1, -1 );
 358 }
 359
 360 void *wxBitmapRefData::GetRawAccess() const
 361 {
 362     wxCHECK_MSG( IsOk(), NULL , wxT("invalid bitmap") ) ;
 363     return m_memBuf.GetData() ;
 364 }
 365
 366 void *wxBitmapRefData::BeginRawAccess()
 367 {
 368     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") ) ;
 369     wxASSERT( m_rawAccessCount == 0 ) ;
 370 #ifndef __WXOSX_IPHONE__
 371     wxASSERT_MSG( m_iconRef == NULL ,
 372                  wxT("Currently, modifing bitmaps that are used in controls already is not supported") ) ;
 373 #endif
 374     ++m_rawAccessCount ;
 375
 376     // we must destroy an existing cached image, as
 377     // the bitmap data may change now
 378     if ( m_cgImageRef )
 379     {
 380         CGImageRelease( m_cgImageRef ) ;
 381         m_cgImageRef = NULL ;
 382     }
 383
 384     return m_memBuf.GetData() ;
 385 }
 386
 387 void wxBitmapRefData::EndRawAccess()
 388 {
 389     wxCHECK_RET( IsOk() , wxT("invalid bitmap") ) ;
 390     wxASSERT( m_rawAccessCount == 1 ) ;
 391
 392     --m_rawAccessCount ;
 393 }
 394
 395 bool wxBitmapRefData::HasNativeSize()
 396 {
 397     int w = GetWidth() ;
 398     int h = GetHeight() ;
 399     int sz = wxMax( w , h ) ;
 400
 401     return ( sz == 128 || sz == 48 || sz == 32 || sz == 16 );
 402 }
 403
 404 #ifndef __WXOSX_IPHONE__
 405 IconRef wxBitmapRefData::GetIconRef()
 406 {
 407     if ( m_iconRef == NULL )
 408     {
 409         // Create Icon Family Handle
 410
 411         IconFamilyHandle iconFamily = (IconFamilyHandle) NewHandle( 0 );
 412
 413         int w = GetWidth() ;
 414         int h = GetHeight() ;
 415         int sz = wxMax( w , h ) ;
 416
 417         OSType dataType = 0 ;
 418         OSType maskType = 0 ;
 419
 420         // since we don't have PICT conversion available, use
 421         // the next larger standard icon size
 422         // TODO: Use NSImage
 423         if (sz <= 16)
 424             sz = 16;
 425         else if ( sz <= 32)
 426             sz = 32;
 427         else if ( sz <= 48)
 428             sz = 48;
 429         else if ( sz <= 128)
 430             sz = 128;
 431         else if ( sz <= 256)
 432             sz = 256;
 433         else if ( sz <= 512)
 434             sz = 512;
 435         else if ( sz <= 1024)
 436             sz = 1024;
 437
 438         switch (sz)
 439         {
 440 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
 441             case 1024:
 442                 dataType = kIconServices1024PixelDataARGB;
 443                 break;
 444 #endif
 445             case 512:
 446                 dataType = kIconServices512PixelDataARGB;
 447                 break;
 448
 449             case 256:
 450                 dataType = kIconServices256PixelDataARGB;
 451                 break;
 452
 453             case 128:
 454                 dataType = kIconServices128PixelDataARGB ;
 455                 break;
 456
 457             case 48:
 458                 dataType = kIconServices48PixelDataARGB ;
 459                 break;
 460
 461             case 32:
 462                 dataType = kIconServices32PixelDataARGB ;
 463                 break;
 464
 465             case 16:
 466                 dataType = kIconServices16PixelDataARGB ;
 467                 break;
 468
 469             default:
 470                 break;
 471         }
 472
 473         if ( dataType != 0 )
 474         {
 475             if (  maskType == 0 )
 476             {
 477                 size_t datasize = sz * sz * 4 ;
 478                 Handle data = NewHandle( datasize ) ;
 479                 HLock( data ) ;
 480                 unsigned char* ptr = (unsigned char*) *data ;
 481                 memset( ptr, 0, datasize );
 482                 bool hasAlpha = HasAlpha() ;
 483                 wxMask *mask = m_bitmapMask ;
 484                 unsigned char * sourcePtr = (unsigned char*) GetRawAccess() ;
 485                 unsigned char * masksourcePtr = mask ? (unsigned char*) mask->GetRawAccess() : NULL ;
 486
 487                 for ( int y = 0 ; y < h ; ++y, sourcePtr += m_bytesPerRow , masksourcePtr += mask ? mask->GetBytesPerRow() : 0 )
 488                 {
 489                     unsigned char * source = sourcePtr;
 490                     unsigned char * masksource = masksourcePtr;
 491                     unsigned char * dest = ptr + y * sz * 4 ;
 492                     unsigned char a, r, g, b;
 493
 494                     for ( int x = 0 ; x < w ; ++x )
 495                     {
 496                         a = *source ++ ;
 497                         r = *source ++ ;
 498                         g = *source ++ ;
 499                         b = *source ++ ;
 500
 501                         if ( mask )
 502                         {
 503                             a = 0xFF - *masksource++ ;
 504                         }
 505                         else if ( !hasAlpha )
 506                             a = 0xFF ;
 507                         else
 508                         {
 509 #if wxOSX_USE_PREMULTIPLIED_ALPHA
 510                             // this must be non-premultiplied data
 511                             if ( a != 0xFF && a!= 0 )
 512                             {
 513                                 r = r * 255 / a;
 514                                 g = g * 255 / a;
 515                                 b = b * 255 / a;
 516                             }
 517 #endif
 518                         }
 519                         *dest++ = a ;
 520                         *dest++ = r ;
 521                         *dest++ = g ;
 522                         *dest++ = b ;
 523
 524                      }
 525                 }
 526                 HUnlock( data );
 527
 528                 OSStatus err = SetIconFamilyData( iconFamily, dataType , data );
 529                 if ( err != noErr )
 530                 {
 531                     wxFAIL_MSG("Error when adding bitmap");
 532                 }
 533
 534                 DisposeHandle( data );
 535             }
 536             else
 537             {
 538                 // setup the header properly
 539
 540                 Handle data = NULL ;
 541                 Handle maskdata = NULL ;
 542                 unsigned char * maskptr = NULL ;
 543                 unsigned char * ptr = NULL ;
 544                 size_t datasize, masksize ;
 545
 546                 datasize = sz * sz * 4 ;
 547                 data = NewHandle( datasize ) ;
 548                 HLock( data ) ;
 549                 ptr = (unsigned char*) *data ;
 550                 memset( ptr , 0, datasize ) ;
 551
 552                 masksize = sz * sz ;
 553                 maskdata = NewHandle( masksize ) ;
 554                 HLock( maskdata ) ;
 555                 maskptr = (unsigned char*) *maskdata ;
 556                 memset( maskptr , 0 , masksize ) ;
 557
 558                 bool hasAlpha = HasAlpha() ;
 559                 wxMask *mask = m_bitmapMask ;
 560                 unsigned char * sourcePtr = (unsigned char*) GetRawAccess() ;
 561                 unsigned char * masksourcePtr = mask ? (unsigned char*) mask->GetRawAccess() : NULL ;
 562
 563                 for ( int y = 0 ; y < h ; ++y, sourcePtr += m_bytesPerRow , masksourcePtr += mask ? mask->GetBytesPerRow() : 0 )
 564                 {
 565                     unsigned char * source = sourcePtr;
 566                     unsigned char * masksource = masksourcePtr;
 567                     unsigned char * dest = ptr + y * sz * 4 ;
 568                     unsigned char * maskdest = maskptr + y * sz ;
 569                     unsigned char a, r, g, b;
 570
 571                     for ( int x = 0 ; x < w ; ++x )
 572                     {
 573                         a = *source ++ ;
 574                         r = *source ++ ;
 575                         g = *source ++ ;
 576                         b = *source ++ ;
 577
 578                         *dest++ = 0 ;
 579                         *dest++ = r ;
 580                         *dest++ = g ;
 581                         *dest++ = b ;
 582
 583                         if ( mask )
 584                             *maskdest++ = 0xFF - *masksource++ ;
 585                         else if ( hasAlpha )
 586                             *maskdest++ = a ;
 587                         else
 588                             *maskdest++ = 0xFF ;
 589                     }
 590                 }
 591
 592                 OSStatus err = SetIconFamilyData( iconFamily, dataType , data ) ;
 593                 wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 594
 595                 err = SetIconFamilyData( iconFamily, maskType , maskdata ) ;
 596                 wxASSERT_MSG( err == noErr , wxT("Error when adding mask") ) ;
 597
 598                 HUnlock( data ) ;
 599                 HUnlock( maskdata ) ;
 600                 DisposeHandle( data ) ;
 601                 DisposeHandle( maskdata ) ;
 602             }
 603         }
 604         // transform into IconRef
 605
 606         // cleaner version existing from 10.3 upwards
 607         HLock((Handle) iconFamily);
 608         OSStatus err = GetIconRefFromIconFamilyPtr( *iconFamily, GetHandleSize((Handle) iconFamily), &m_iconRef );
 609         HUnlock((Handle) iconFamily);
 610         DisposeHandle( (Handle) iconFamily ) ;
 611
 612         wxCHECK_MSG( err == noErr, NULL, wxT("Error when constructing icon ref") );
 613     }
 614
 615     return m_iconRef ;
 616 }
 617
 618 #endif
 619
 620 CGImageRef wxBitmapRefData::CreateCGImage() const
 621 {
 622     wxASSERT( m_ok ) ;
 623     wxASSERT( m_rawAccessCount >= 0 ) ;
 624     CGImageRef image ;
 625     if ( m_rawAccessCount > 0 || m_cgImageRef == NULL )
 626     {
 627         if ( m_depth != 1 && m_bitmapMask == NULL )
 628         {
 629 #if 0
 630             // in order for this code to work properly, wxMask would have to invert black and white
 631             // in the native bitmap
 632             if ( m_bitmapMask )
 633             {
 634                 CGImageRef tempImage = CGBitmapContextCreateImage( m_hBitmap );
 635                 CGImageRef tempMask = CGBitmapContextCreateImage((CGContextRef) m_bitmapMask->GetHBITMAP() );
 636                 image = CGImageCreateWithMask( tempImage, tempMask );
 637                 CGImageRelease(tempMask);
 638                 CGImageRelease(tempImage);
 639             }
 640             else
 641 #endif
 642                 image = CGBitmapContextCreateImage( m_hBitmap );
 643         }
 644         else
 645         {
 646             size_t imageSize = m_height * m_bytesPerRow ;
 647             void * dataBuffer = m_memBuf.GetData() ;
 648             int w = m_width ;
 649             int h = m_height ;
 650             CGImageAlphaInfo alphaInfo = kCGImageAlphaNoneSkipFirst ;
 651             wxMemoryBuffer membuf;
 652
 653             if ( m_bitmapMask )
 654             {
 655                 alphaInfo = kCGImageAlphaFirst ;
 656                 unsigned char *destalphastart = (unsigned char*) membuf.GetWriteBuf( imageSize ) ;
 657                 memcpy( destalphastart , dataBuffer , imageSize ) ;
 658                 unsigned char *sourcemaskstart = (unsigned char *) m_bitmapMask->GetRawAccess() ;
 659                 int maskrowbytes = m_bitmapMask->GetBytesPerRow() ;
 660                 for ( int y = 0 ; y < h ; ++y , destalphastart += m_bytesPerRow, sourcemaskstart += maskrowbytes)
 661                 {
 662                     unsigned char *sourcemask = sourcemaskstart ;
 663                     unsigned char *destalpha = destalphastart ;
 664                     for ( int x = 0 ; x < w ; ++x , sourcemask += kMaskBytesPerPixel , destalpha += 4 )
 665                     {
 666                         *destalpha = 0xFF - *sourcemask ;
 667                     }
 668                 }
 669                 membuf.UngetWriteBuf( imageSize );
 670             }
 671             else
 672             {
 673                 if ( m_hasAlpha )
 674                 {
 675 #if wxOSX_USE_PREMULTIPLIED_ALPHA
 676                     alphaInfo = kCGImageAlphaPremultipliedFirst ;
 677 #else
 678                     alphaInfo = kCGImageAlphaFirst ;
 679 #endif
 680                 }
 681
 682                 membuf = m_memBuf;
 683             }
 684
 685             CGDataProviderRef dataProvider = NULL ;
 686             if ( m_depth == 1 )
 687             {
 688                 // TODO CHECK ALIGNMENT
 689                 wxMemoryBuffer maskBuf;
 690                 unsigned char * maskBufData = (unsigned char*) maskBuf.GetWriteBuf( m_width * m_height );
 691                 unsigned char * bufData = (unsigned char *) membuf.GetData() ;
 692                 // copy one color component
 693                 size_t i = 0;
 694                 for( int y = 0 ; y < m_height ; bufData+= m_bytesPerRow, ++y )
 695                 {
 696                     unsigned char *bufDataIter = bufData+3;
 697                     for ( int x = 0 ; x < m_width ; bufDataIter += 4, ++x, ++i )
 698                     {
 699                         maskBufData[i] = *bufDataIter;
 700                     }
 701                 }
 702                 maskBuf.UngetWriteBuf( m_width * m_height );
 703
 704                 dataProvider =
 705                     wxMacCGDataProviderCreateWithMemoryBuffer( maskBuf );
 706
 707                 image = ::CGImageMaskCreate( w, h, 8, 8, m_width , dataProvider, NULL, false );
 708             }
 709             else
 710             {
 711                 CGColorSpaceRef colorSpace = wxMacGetGenericRGBColorSpace();
 712                 dataProvider = wxMacCGDataProviderCreateWithMemoryBuffer( membuf );
 713                 image =
 714                     ::CGImageCreate(
 715                                     w, h, 8 , 32 , m_bytesPerRow , colorSpace, alphaInfo ,
 716                                     dataProvider, NULL , false , kCGRenderingIntentDefault );
 717             }
 718             CGDataProviderRelease( dataProvider);
 719         }
 720     }
 721     else
 722     {
 723         image = m_cgImageRef ;
 724         CGImageRetain( image ) ;
 725     }
 726
 727     if ( m_rawAccessCount == 0 && m_cgImageRef == NULL)
 728     {
 729         // we keep it for later use
 730         m_cgImageRef = image ;
 731         CGImageRetain( image ) ;
 732     }
 733
 734     return image ;
 735 }
 736
 737 CGContextRef wxBitmapRefData::GetBitmapContext() const
 738 {
 739     return m_hBitmap;
 740 }
 741
 742 void wxBitmapRefData::Free()
 743 {
 744     wxASSERT_MSG( m_rawAccessCount == 0 , wxT("Bitmap still selected when destroyed") ) ;
 745
 746     if ( m_cgImageRef )
 747     {
 748         CGImageRelease( m_cgImageRef ) ;
 749         m_cgImageRef = NULL ;
 750     }
 751 #ifndef __WXOSX_IPHONE__
 752     if ( m_iconRef )
 753     {
 754         ReleaseIconRef( m_iconRef ) ;
 755         m_iconRef = NULL ;
 756     }
 757 #endif
 758     if ( m_hBitmap )
 759     {
 760         CGContextRelease(m_hBitmap);
 761         m_hBitmap = NULL ;
 762     }
 763
 764     wxDELETE(m_bitmapMask);
 765 }
 766
 767 wxBitmapRefData::~wxBitmapRefData()
 768 {
 769     Free() ;
 770 }
 771
 772
 773
 774 // ----------------------------------------------------------------------------
 775 // wxBitmap
 776 // ----------------------------------------------------------------------------
 777
 778 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 779 {
 780     bool created = false ;
 781     int w = icon.GetWidth() ;
 782     int h = icon.GetHeight() ;
 783
 784     Create( w , h ) ;
 785 #ifdef __WXOSX_CARBON__
 786     if ( w == h && ( w == 16 || w == 32 || w == 48 || w == 128 ) )
 787     {
 788         IconFamilyHandle iconFamily = NULL ;
 789         Handle imagehandle = NewHandle( 0 ) ;
 790         Handle maskhandle = NewHandle( 0 ) ;
 791
 792         OSType maskType = 0;
 793         OSType dataType = 0;
 794         IconSelectorValue selector = 0 ;
 795
 796         switch (w)
 797         {
 798             case 128:
 799                 dataType = kThumbnail32BitData ;
 800                 maskType = kThumbnail8BitMask ;
 801                 selector = kSelectorAllAvailableData ;
 802                 break;
 803
 804             case 48:
 805                 dataType = kHuge32BitData ;
 806                 maskType = kHuge8BitMask ;
 807                 selector = kSelectorHuge32Bit | kSelectorHuge8BitMask ;
 808                 break;
 809
 810             case 32:
 811                 dataType = kLarge32BitData ;
 812                 maskType = kLarge8BitMask ;
 813                 selector = kSelectorLarge32Bit | kSelectorLarge8BitMask ;
 814                 break;
 815
 816             case 16:
 817                 dataType = kSmall32BitData ;
 818                 maskType = kSmall8BitMask ;
 819                 selector = kSelectorSmall32Bit | kSelectorSmall8BitMask ;
 820                 break;
 821
 822             default:
 823                 break;
 824         }
 825
 826         OSStatus err = IconRefToIconFamily( MAC_WXHICON(icon.GetHICON()) , selector , &iconFamily ) ;
 827
 828         err = GetIconFamilyData( iconFamily , dataType , imagehandle ) ;
 829         err = GetIconFamilyData( iconFamily , maskType , maskhandle ) ;
 830         size_t imagehandlesize = GetHandleSize( imagehandle ) ;
 831         size_t maskhandlesize = GetHandleSize( maskhandle ) ;
 832
 833         if ( imagehandlesize != 0 && maskhandlesize != 0 )
 834         {
 835             wxASSERT( GetHandleSize( imagehandle ) == w * 4 * h ) ;
 836             wxASSERT( GetHandleSize( maskhandle ) == w * h ) ;
 837
 838             UseAlpha() ;
 839
 840             unsigned char *source = (unsigned char *) *imagehandle ;
 841             unsigned char *sourcemask = (unsigned char *) *maskhandle ;
 842             unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 843
 844             for ( int y = 0 ; y < h ; ++y )
 845             {
 846                 for ( int x = 0 ; x < w ; ++x )
 847                 {
 848                     unsigned char a = *sourcemask++;
 849                     *destination++ = a;
 850                     source++ ;
 851 #if wxOSX_USE_PREMULTIPLIED_ALPHA
 852                     *destination++ = ( (*source++) * a + 127 ) / 255;
 853                     *destination++ = ( (*source++) * a + 127 ) / 255;
 854                     *destination++ = ( (*source++) * a + 127 ) / 255;
 855 #else
 856                     *destination++ = *source++ ;
 857                     *destination++ = *source++ ;
 858                     *destination++ = *source++ ;
 859 #endif
 860                 }
 861             }
 862
 863             EndRawAccess() ;
 864             DisposeHandle( imagehandle ) ;
 865             DisposeHandle( maskhandle ) ;
 866             created = true ;
 867         }
 868
 869         DisposeHandle( (Handle) iconFamily ) ;
 870     }
 871 #endif
 872     if ( !created )
 873     {
 874         wxMemoryDC dc ;
 875         dc.SelectObject( *this ) ;
 876         dc.DrawIcon( icon , 0 , 0 ) ;
 877         dc.SelectObject( wxNullBitmap ) ;
 878     }
 879
 880     return true;
 881 }
 882
 883 wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
 884 {
 885     wxBitmapRefData* bitmapRefData;
 886
 887     m_refData = bitmapRefData = new wxBitmapRefData( the_width , the_height , no_bits ) ;
 888
 889     if (bitmapRefData->IsOk())
 890     {
 891         if ( no_bits == 1 )
 892         {
 893             int linesize = the_width / 8;
 894             if ( the_width % 8 )
 895                 linesize++;
 896
 897             unsigned char* linestart = (unsigned char*) bits ;
 898             unsigned char* destptr = (unsigned char*) BeginRawAccess() ;
 899
 900             for ( int y = 0 ; y < the_height ; ++y , linestart += linesize, destptr += M_BITMAPDATA->GetBytesPerRow() )
 901             {
 902                 unsigned char* destination = destptr;
 903                 int index, bit, mask;
 904
 905                 for ( int x = 0 ; x < the_width ; ++x )
 906                 {
 907                     index = x / 8 ;
 908                     bit = x % 8 ;
 909                     mask = 1 << bit ;
 910
 911                     if ( linestart[index] & mask )
 912                     {
 913                         *destination++ = 0xFF ;
 914                         *destination++ = 0 ;
 915                         *destination++ = 0 ;
 916                         *destination++ = 0 ;
 917                     }
 918                     else
 919                     {
 920                         *destination++ = 0xFF ;
 921                         *destination++ = 0xFF ;
 922                         *destination++ = 0xFF ;
 923                         *destination++ = 0xFF ;
 924                     }
 925                 }
 926             }
 927
 928             EndRawAccess() ;
 929         }
 930         else
 931         {
 932             wxFAIL_MSG(wxT("multicolor BITMAPs not yet implemented"));
 933         }
 934     } /* bitmapRefData->IsOk() */
 935 }
 936
 937 wxBitmap::wxBitmap(const void* data, wxBitmapType type, int width, int height, int depth)
 938 {
 939     (void) Create(data, type, width, height, depth);
 940 }
 941
 942 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
 943 {
 944     LoadFile(filename, type);
 945 }
 946
 947 wxBitmap::wxBitmap(CGImageRef image)
 948 {
 949     (void) Create(image);
 950 }
 951
 952 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 953 {
 954     return new wxBitmapRefData;
 955 }
 956
 957 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 958 {
 959     return new wxBitmapRefData(*static_cast<const wxBitmapRefData *>(data));
 960 }
 961
 962 void * wxBitmap::GetRawAccess() const
 963 {
 964     wxCHECK_MSG( IsOk() , NULL , wxT("invalid bitmap") ) ;
 965
 966     return M_BITMAPDATA->GetRawAccess() ;
 967 }
 968
 969 void * wxBitmap::BeginRawAccess()
 970 {
 971     wxCHECK_MSG( IsOk() , NULL , wxT("invalid bitmap") ) ;
 972
 973     return M_BITMAPDATA->BeginRawAccess() ;
 974 }
 975
 976 void wxBitmap::EndRawAccess()
 977 {
 978     wxCHECK_RET( IsOk() , wxT("invalid bitmap") ) ;
 979
 980     M_BITMAPDATA->EndRawAccess() ;
 981 }
 982
 983 CGImageRef wxBitmap::CreateCGImage() const
 984 {
 985     wxCHECK_MSG( IsOk(), NULL , wxT("invalid bitmap") ) ;
 986
 987     return M_BITMAPDATA->CreateCGImage() ;
 988 }
 989
 990 #ifndef  __WXOSX_IPHONE__
 991 IconRef wxBitmap::GetIconRef() const
 992 {
 993     wxCHECK_MSG( IsOk(), NULL , wxT("invalid bitmap") ) ;
 994
 995     return M_BITMAPDATA->GetIconRef() ;
 996 }
 997
 998 IconRef wxBitmap::CreateIconRef() const
 999 {
1000     IconRef icon = GetIconRef();
1001     verify_noerr( AcquireIconRef(icon) );
1002     return icon;
1003 }
1004 #endif
1005
1006 #if wxOSX_USE_COCOA
1007
1008 wxBitmap::wxBitmap(WX_NSImage image)
1009 {
1010     (void)Create(image);
1011 }
1012
1013 bool wxBitmap::Create(WX_NSImage image)
1014 {
1015     wxCFRef<CGImageRef> cgimage(wxOSXCreateCGImageFromNSImage(image));
1016     return Create(cgimage);
1017 }
1018
1019 WX_NSImage wxBitmap::GetNSImage() const
1020 {
1021     wxCFRef< CGImageRef > cgimage(CreateCGImage());
1022     return wxOSXGetNSImageFromCGImage( cgimage );
1023 }
1024
1025 #endif
1026
1027 #if wxOSX_USE_IPHONE
1028
1029 WX_UIImage wxBitmap::GetUIImage() const
1030 {
1031     wxCFRef< CGImageRef > cgimage(CreateCGImage());
1032     return wxOSXGetUIImageFromCGImage( cgimage );
1033 }
1034
1035 #endif
1036 wxBitmap wxBitmap::GetSubBitmap(const wxRect &rect) const
1037 {
1038     wxCHECK_MSG( IsOk() &&
1039                 (rect.x >= 0) && (rect.y >= 0) &&
1040                 (rect.x+rect.width <= GetWidth()) &&
1041                 (rect.y+rect.height <= GetHeight()),
1042                 wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1043
1044     wxBitmap ret( rect.width, rect.height, GetDepth() );
1045     wxASSERT_MSG( ret.IsOk(), wxT("GetSubBitmap error") );
1046
1047     int destwidth = rect.width ;
1048     int destheight = rect.height ;
1049
1050     {
1051         unsigned char *sourcedata = (unsigned char*) GetRawAccess() ;
1052         unsigned char *destdata = (unsigned char*) ret.BeginRawAccess() ;
1053         wxASSERT((sourcedata != NULL) && (destdata != NULL));
1054
1055         if ( (sourcedata != NULL) && (destdata != NULL) )
1056         {
1057             int sourcelinesize = GetBitmapData()->GetBytesPerRow() ;
1058             int destlinesize = ret.GetBitmapData()->GetBytesPerRow() ;
1059             unsigned char *source = sourcedata + rect.x * 4 + rect.y * sourcelinesize ;
1060             unsigned char *dest = destdata ;
1061
1062             for (int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
1063             {
1064                 memcpy( dest , source , destlinesize ) ;
1065             }
1066         }
1067         ret.EndRawAccess() ;
1068     }
1069
1070
1071     if ( M_BITMAPDATA->m_bitmapMask )
1072     {
1073         wxMemoryBuffer maskbuf ;
1074         int rowBytes = GetBestBytesPerRow( destwidth * kMaskBytesPerPixel );
1075         size_t maskbufsize = rowBytes * destheight ;
1076
1077         int sourcelinesize = M_BITMAPDATA->m_bitmapMask->GetBytesPerRow() ;
1078         int destlinesize = rowBytes ;
1079
1080         unsigned char *source = (unsigned char *) M_BITMAPDATA->m_bitmapMask->GetRawAccess() ;
1081         unsigned char *destdata = (unsigned char * ) maskbuf.GetWriteBuf( maskbufsize ) ;
1082         wxASSERT( (source != NULL) && (destdata != NULL) ) ;
1083
1084         if ( (source != NULL) && (destdata != NULL) )
1085         {
1086             source += rect.x * kMaskBytesPerPixel + rect.y * sourcelinesize ;
1087             unsigned char *dest = destdata ;
1088
1089             for (int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
1090             {
1091                 memcpy( dest , source , destlinesize ) ;
1092             }
1093
1094             maskbuf.UngetWriteBuf( maskbufsize ) ;
1095         }
1096         ret.SetMask( new wxMask( maskbuf , destwidth , destheight , rowBytes ) ) ;
1097     }
1098     else if ( HasAlpha() )
1099         ret.UseAlpha() ;
1100
1101     return ret;
1102 }
1103
1104 bool wxBitmap::Create(int w, int h, int d)
1105 {
1106     UnRef();
1107
1108     if ( d < 0 )
1109         d = wxDisplayDepth() ;
1110
1111     m_refData = new wxBitmapRefData( w , h , d );
1112
1113     return M_BITMAPDATA->IsOk() ;
1114 }
1115
1116
1117 bool wxBitmap::Create(CGImageRef image)
1118 {
1119     UnRef();
1120
1121     m_refData = new wxBitmapRefData( image );
1122
1123     return M_BITMAPDATA->IsOk() ;
1124 }
1125
1126 bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
1127 {
1128     UnRef();
1129
1130     wxBitmapHandler *handler = FindHandler(type);
1131
1132     if ( handler )
1133     {
1134         m_refData = new wxBitmapRefData;
1135
1136         return handler->LoadFile(this, filename, type, -1, -1);
1137     }
1138     else
1139     {
1140 #if wxUSE_IMAGE
1141         wxImage loadimage(filename, type);
1142         if (loadimage.IsOk())
1143         {
1144             *this = loadimage;
1145
1146             return true;
1147         }
1148 #endif
1149     }
1150
1151     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1152
1153     return false;
1154 }
1155
1156 bool wxBitmap::Create(const void* data, wxBitmapType type, int width, int height, int depth)
1157 {
1158     UnRef();
1159
1160     m_refData = new wxBitmapRefData;
1161
1162     wxBitmapHandler *handler = FindHandler(type);
1163
1164     if ( handler == NULL )
1165     {
1166         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1167
1168         return false;
1169     }
1170
1171     return handler->Create(this, data, type, width, height, depth);
1172 }
1173
1174 #if wxUSE_IMAGE
1175
1176 wxBitmap::wxBitmap(const wxImage& image, int depth)
1177 {
1178     wxCHECK_RET( image.IsOk(), wxT("invalid image") );
1179
1180     // width and height of the device-dependent bitmap
1181     int width = image.GetWidth();
1182     int height = image.GetHeight();
1183
1184     wxBitmapRefData* bitmapRefData;
1185
1186     m_refData = bitmapRefData = new wxBitmapRefData( width , height , depth ) ;
1187
1188     if ( bitmapRefData->IsOk())
1189     {
1190         // Create picture
1191
1192         bool hasAlpha = false ;
1193
1194         if ( image.HasMask() )
1195         {
1196             // takes precedence, don't mix with alpha info
1197         }
1198         else
1199         {
1200             hasAlpha = image.HasAlpha() ;
1201         }
1202
1203         if ( hasAlpha )
1204             UseAlpha() ;
1205
1206         unsigned char* destinationstart = (unsigned char*) BeginRawAccess() ;
1207         register unsigned char* data = image.GetData();
1208         if ( destinationstart != NULL && data != NULL )
1209         {
1210             const unsigned char *alpha = hasAlpha ? image.GetAlpha() : NULL ;
1211             for (int y = 0; y < height; destinationstart += M_BITMAPDATA->GetBytesPerRow(), y++)
1212             {
1213                 unsigned char * destination = destinationstart;
1214                 for (int x = 0; x < width; x++)
1215                 {
1216                     if ( hasAlpha )
1217                     {
1218                         const unsigned char a = *alpha++;
1219                         *destination++ = a ;
1220
1221     #if wxOSX_USE_PREMULTIPLIED_ALPHA
1222                         *destination++ = ((*data++) * a + 127) / 255 ;
1223                         *destination++ = ((*data++) * a + 127) / 255 ;
1224                         *destination++ = ((*data++) * a + 127) / 255 ;
1225     #else
1226                         *destination++ = *data++ ;
1227                         *destination++ = *data++ ;
1228                         *destination++ = *data++ ;
1229     #endif
1230                     }
1231                     else
1232                     {
1233                         *destination++ = 0xFF ;
1234                         *destination++ = *data++ ;
1235                         *destination++ = *data++ ;
1236                         *destination++ = *data++ ;
1237                     }
1238                 }
1239             }
1240
1241             EndRawAccess() ;
1242         }
1243         if ( image.HasMask() )
1244             SetMask( new wxMask( *this , wxColour( image.GetMaskRed() , image.GetMaskGreen() , image.GetMaskBlue() ) ) ) ;
1245     } /* bitmapRefData->IsOk() */
1246 }
1247
1248 wxImage wxBitmap::ConvertToImage() const
1249 {
1250     wxImage image;
1251
1252     wxCHECK_MSG( IsOk(), wxNullImage, wxT("invalid bitmap") );
1253
1254     // create an wxImage object
1255     int width = GetWidth();
1256     int height = GetHeight();
1257     image.Create( width, height );
1258
1259     unsigned char *data = image.GetData();
1260     wxCHECK_MSG( data, wxNullImage, wxT("Could not allocate data for image") );
1261
1262     unsigned char* sourcestart = (unsigned char*) GetRawAccess() ;
1263
1264     bool hasAlpha = false ;
1265     bool hasMask = false ;
1266     int maskBytesPerRow = 0 ;
1267     unsigned char *alpha = NULL ;
1268     unsigned char *mask = NULL ;
1269
1270     if ( HasAlpha() )
1271         hasAlpha = true ;
1272
1273     if ( GetMask() )
1274     {
1275         hasMask = true ;
1276         mask = (unsigned char*) GetMask()->GetRawAccess() ;
1277         maskBytesPerRow = GetMask()->GetBytesPerRow() ;
1278     }
1279
1280     if ( hasAlpha )
1281     {
1282         image.SetAlpha() ;
1283         alpha = image.GetAlpha() ;
1284     }
1285
1286     int index = 0;
1287
1288     // The following masking algorithm is the same as well in msw/gtk:
1289     // the colour used as transparent one in wxImage and the one it is
1290     // replaced with when it actually occurs in the bitmap
1291     static const int MASK_RED = 1;
1292     static const int MASK_GREEN = 2;
1293     static const int MASK_BLUE = 3;
1294     static const int MASK_BLUE_REPLACEMENT = 2;
1295
1296     for (int yy = 0; yy < height; yy++ , sourcestart += M_BITMAPDATA->GetBytesPerRow() , mask += maskBytesPerRow )
1297     {
1298         unsigned char * maskp = mask ;
1299         unsigned char * source = sourcestart;
1300         unsigned char a, r, g, b;
1301         long color;
1302
1303         for (int xx = 0; xx < width; xx++)
1304         {
1305             color = *((long*) source) ;
1306 #ifdef WORDS_BIGENDIAN
1307             a = ((color&0xFF000000) >> 24) ;
1308             r = ((color&0x00FF0000) >> 16) ;
1309             g = ((color&0x0000FF00) >> 8) ;
1310             b = (color&0x000000FF);
1311 #else
1312             b = ((color&0xFF000000) >> 24) ;
1313             g = ((color&0x00FF0000) >> 16) ;
1314             r = ((color&0x0000FF00) >> 8) ;
1315             a = (color&0x000000FF);
1316 #endif
1317             if ( hasMask )
1318             {
1319                 if ( *maskp++ == 0xFF )
1320                 {
1321                     r = MASK_RED ;
1322                     g = MASK_GREEN ;
1323                     b = MASK_BLUE ;
1324                 }
1325                 else if ( r == MASK_RED && g == MASK_GREEN && b == MASK_BLUE )
1326                     b = MASK_BLUE_REPLACEMENT ;
1327             }
1328             else if ( hasAlpha )
1329             {
1330                 *alpha++ = a ;
1331 #if wxOSX_USE_PREMULTIPLIED_ALPHA
1332                 // this must be non-premultiplied data
1333                 if ( a != 0xFF && a!= 0 )
1334                 {
1335                     r = r * 255 / a;
1336                     g = g * 255 / a;
1337                     b = b * 255 / a;
1338                 }
1339 #endif
1340             }
1341
1342             data[index    ] = r ;
1343             data[index + 1] = g ;
1344             data[index + 2] = b ;
1345
1346             index += 3;
1347             source += 4 ;
1348         }
1349     }
1350
1351     if ( hasMask )
1352         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1353
1354     return image;
1355 }
1356
1357 #endif //wxUSE_IMAGE
1358
1359 bool wxBitmap::SaveFile( const wxString& filename,
1360     wxBitmapType type, const wxPalette *palette ) const
1361 {
1362     bool success = false;
1363     wxBitmapHandler *handler = FindHandler(type);
1364
1365     if ( handler )
1366     {
1367         success = handler->SaveFile(this, filename, type, palette);
1368     }
1369     else
1370     {
1371 #if wxUSE_IMAGE
1372         wxImage image = ConvertToImage();
1373         success = image.SaveFile(filename, type);
1374 #else
1375         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1376 #endif
1377     }
1378
1379     return success;
1380 }
1381
1382 int wxBitmap::GetHeight() const
1383 {
1384    wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
1385
1386    return M_BITMAPDATA->GetHeight();
1387 }
1388
1389 int wxBitmap::GetWidth() const
1390 {
1391    wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
1392
1393    return M_BITMAPDATA->GetWidth() ;
1394 }
1395
1396 int wxBitmap::GetDepth() const
1397 {
1398    wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
1399
1400    return M_BITMAPDATA->GetDepth();
1401 }
1402
1403 wxMask *wxBitmap::GetMask() const
1404 {
1405    wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
1406
1407    return M_BITMAPDATA->m_bitmapMask;
1408 }
1409
1410 bool wxBitmap::HasAlpha() const
1411 {
1412    wxCHECK_MSG( IsOk(), false , wxT("invalid bitmap") );
1413
1414    return M_BITMAPDATA->HasAlpha() ;
1415 }
1416
1417 void wxBitmap::SetWidth(int w)
1418 {
1419     AllocExclusive();
1420     M_BITMAPDATA->SetWidth(w);
1421 }
1422
1423 void wxBitmap::SetHeight(int h)
1424 {
1425     AllocExclusive();
1426     M_BITMAPDATA->SetHeight(h);
1427 }
1428
1429 void wxBitmap::SetDepth(int d)
1430 {
1431     AllocExclusive();
1432     M_BITMAPDATA->SetDepth(d);
1433 }
1434
1435 void wxBitmap::SetOk(bool isOk)
1436 {
1437     AllocExclusive();
1438     M_BITMAPDATA->SetOk(isOk);
1439 }
1440
1441 #if wxUSE_PALETTE
1442 wxPalette *wxBitmap::GetPalette() const
1443 {
1444    wxCHECK_MSG( IsOk(), NULL, wxT("Invalid bitmap  GetPalette()") );
1445
1446    return &M_BITMAPDATA->m_bitmapPalette;
1447 }
1448
1449 void wxBitmap::SetPalette(const wxPalette& palette)
1450 {
1451     AllocExclusive();
1452     M_BITMAPDATA->m_bitmapPalette = palette ;
1453 }
1454 #endif // wxUSE_PALETTE
1455
1456 void wxBitmap::SetMask(wxMask *mask)
1457 {
1458     AllocExclusive();
1459     // Remove existing mask if there is one.
1460     delete M_BITMAPDATA->m_bitmapMask;
1461
1462     M_BITMAPDATA->m_bitmapMask = mask ;
1463 }
1464
1465 WXHBITMAP wxBitmap::GetHBITMAP(WXHBITMAP* mask) const
1466 {
1467     wxUnusedVar(mask);
1468
1469     return WXHBITMAP(M_BITMAPDATA->GetBitmapContext());
1470 }
1471
1472 // ----------------------------------------------------------------------------
1473 // wxMask
1474 // ----------------------------------------------------------------------------
1475
1476 wxMask::wxMask()
1477 {
1478     Init() ;
1479 }
1480
1481 wxMask::wxMask(const wxMask &tocopy) : wxObject()
1482 {
1483     Init();
1484
1485     m_bytesPerRow = tocopy.m_bytesPerRow;
1486     m_width = tocopy.m_width;
1487     m_height = tocopy.m_height;
1488
1489     size_t size = m_bytesPerRow * m_height;
1490     unsigned char* dest = (unsigned char*)m_memBuf.GetWriteBuf( size );
1491     unsigned char* source = (unsigned char*)tocopy.m_memBuf.GetData();
1492     memcpy( dest, source, size );
1493     m_memBuf.UngetWriteBuf( size ) ;
1494     RealizeNative() ;
1495 }
1496
1497 // Construct a mask from a bitmap and a colour indicating
1498 // the transparent area
1499 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
1500 {
1501     Init() ;
1502     Create( bitmap, colour );
1503 }
1504
1505 // Construct a mask from a mono bitmap (copies the bitmap).
1506 wxMask::wxMask( const wxBitmap& bitmap )
1507 {
1508     Init() ;
1509     Create( bitmap );
1510 }
1511
1512 // Construct a mask from a mono bitmap (copies the bitmap).
1513
1514 wxMask::wxMask( const wxMemoryBuffer& data, int width , int height , int bytesPerRow )
1515 {
1516     Init() ;
1517     Create( data, width , height , bytesPerRow );
1518 }
1519
1520 wxMask::~wxMask()
1521 {
1522     if ( m_maskBitmap )
1523     {
1524         CGContextRelease( (CGContextRef) m_maskBitmap );
1525         m_maskBitmap = NULL ;
1526     }
1527 }
1528
1529 void wxMask::Init()
1530 {
1531     m_width = m_height = m_bytesPerRow = 0 ;
1532     m_maskBitmap = NULL ;
1533 }
1534
1535 void *wxMask::GetRawAccess() const
1536 {
1537     return m_memBuf.GetData() ;
1538 }
1539
1540 // The default ColorTable for k8IndexedGrayPixelFormat in Intel appears to be broken, so we'll use an non-indexed
1541 // bitmap mask instead; in order to keep the code simple, the change applies to PowerPC implementations as well
1542
1543 void wxMask::RealizeNative()
1544 {
1545     if ( m_maskBitmap )
1546     {
1547         CGContextRelease( (CGContextRef) m_maskBitmap );
1548        m_maskBitmap = NULL ;
1549     }
1550
1551     CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceGray();
1552     // from MouseTracking sample :
1553     // Ironically, due to a bug in CGImageCreateWithMask, you cannot use
1554     // CGColorSpaceCreateWithName(kCGColorSpaceGenericGray) at this point!
1555
1556     m_maskBitmap = CGBitmapContextCreate((char*) m_memBuf.GetData(), m_width, m_height, 8, m_bytesPerRow, colorspace,
1557         kCGImageAlphaNone );
1558     CGColorSpaceRelease( colorspace );
1559     wxASSERT_MSG( m_maskBitmap , wxT("Unable to create CGBitmapContext context") ) ;
1560 }
1561
1562 // Create a mask from a mono bitmap (copies the bitmap).
1563
1564 bool wxMask::Create(const wxMemoryBuffer& data,int width , int height , int bytesPerRow)
1565 {
1566     m_memBuf = data ;
1567     m_width = width ;
1568     m_height = height ;
1569     m_bytesPerRow = bytesPerRow ;
1570
1571     wxASSERT( data.GetDataLen() == (size_t)(height * bytesPerRow) ) ;
1572
1573     RealizeNative() ;
1574
1575     return true ;
1576 }
1577
1578 // Create a mask from a mono bitmap (copies the bitmap).
1579 bool wxMask::Create(const wxBitmap& bitmap)
1580 {
1581     m_width = bitmap.GetWidth() ;
1582     m_height = bitmap.GetHeight() ;
1583     m_bytesPerRow = GetBestBytesPerRow( m_width * kMaskBytesPerPixel ) ;
1584
1585     size_t size = m_bytesPerRow * m_height ;
1586     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1587     wxASSERT( destdatabase != NULL ) ;
1588
1589     if ( destdatabase )
1590     {
1591         memset( destdatabase , 0 , size ) ;
1592         unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1593
1594         for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow )
1595         {
1596             unsigned char *destdata = destdatabase ;
1597             unsigned char r, g, b;
1598
1599             for ( int x = 0 ; x < m_width ; ++x )
1600             {
1601                 srcdata++ ;
1602                 r = *srcdata++ ;
1603                 g = *srcdata++ ;
1604                 b = *srcdata++ ;
1605
1606                 if ( ( r + g + b ) > 0x10 )
1607                     *destdata++ = 0xFF ;
1608                 else
1609                     *destdata++ = 0x00 ;
1610             }
1611         }
1612     }
1613
1614     m_memBuf.UngetWriteBuf( size ) ;
1615     RealizeNative() ;
1616
1617     return true;
1618 }
1619
1620 // Create a mask from a bitmap and a colour indicating
1621 // the transparent area
1622 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1623 {
1624     m_width = bitmap.GetWidth() ;
1625     m_height = bitmap.GetHeight() ;
1626     m_bytesPerRow = GetBestBytesPerRow( m_width * kMaskBytesPerPixel ) ;
1627
1628     size_t size = m_bytesPerRow * m_height ;
1629     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1630     wxASSERT( destdatabase != NULL ) ;
1631     if ( destdatabase != NULL)
1632     {
1633         memset( destdatabase , 0 , size ) ;
1634         unsigned char * srcdatabase = (unsigned char*) bitmap.GetRawAccess() ;
1635         size_t sourceBytesRow = bitmap.GetBitmapData()->GetBytesPerRow();
1636
1637         for ( int y = 0 ; y < m_height ; ++y , srcdatabase+= sourceBytesRow, destdatabase += m_bytesPerRow)
1638         {
1639             unsigned char *srcdata = srcdatabase ;
1640             unsigned char *destdata = destdatabase ;
1641             unsigned char r, g, b;
1642
1643             for ( int x = 0 ; x < m_width ; ++x )
1644             {
1645                 srcdata++ ;
1646                 r = *srcdata++ ;
1647                 g = *srcdata++ ;
1648                 b = *srcdata++ ;
1649
1650                 if ( colour == wxColour( r , g , b ) )
1651                     *destdata++ = 0xFF ;
1652                 else
1653                     *destdata++ = 0x00 ;
1654             }
1655         }
1656     }
1657     m_memBuf.UngetWriteBuf( size ) ;
1658     RealizeNative() ;
1659
1660     return true;
1661 }
1662
1663 wxBitmap wxMask::GetBitmap() const
1664 {
1665     wxBitmap bitmap(m_width, m_height, 1);
1666     unsigned char* dst = static_cast<unsigned char*>(bitmap.BeginRawAccess());
1667     const int dst_stride = bitmap.GetBitmapData()->GetBytesPerRow();
1668     const unsigned char* src = static_cast<unsigned char*>(GetRawAccess());
1669     for (int j = 0; j < m_height; j++, src += m_bytesPerRow, dst += dst_stride)
1670     {
1671         unsigned char* d = dst;
1672         for (int i = 0; i < m_width; i++)
1673         {
1674             const unsigned char byte = src[i];
1675             *d++ = 0xff;
1676             *d++ = byte;
1677             *d++ = byte;
1678             *d++ = byte;
1679         }
1680     }
1681     bitmap.EndRawAccess();
1682     return bitmap;
1683 }
1684
1685 WXHBITMAP wxMask::GetHBITMAP() const
1686 {
1687     return m_maskBitmap ;
1688 }
1689
1690 // ----------------------------------------------------------------------------
1691 // Standard Handlers
1692 // ----------------------------------------------------------------------------
1693
1694 class WXDLLEXPORT wxBundleResourceHandler: public wxBitmapHandler
1695 {
1696     DECLARE_ABSTRACT_CLASS(wxBundleResourceHandler)
1697
1698 public:
1699     inline wxBundleResourceHandler()
1700     {
1701     };
1702
1703     virtual bool LoadFile(wxBitmap *bitmap,
1704                           const wxString& name,
1705                           wxBitmapType type,
1706                           int desiredWidth,
1707                           int desiredHeight);
1708 };
1709
1710 IMPLEMENT_ABSTRACT_CLASS(wxBundleResourceHandler, wxBitmapHandler);
1711
1712 class WXDLLEXPORT wxPNGResourceHandler: public wxBundleResourceHandler
1713 {
1714     DECLARE_DYNAMIC_CLASS(wxPNGResourceHandler)
1715
1716 public:
1717     inline wxPNGResourceHandler()
1718     {
1719         SetName(wxT("PNG resource"));
1720         SetExtension("PNG");
1721         SetType(wxBITMAP_TYPE_PNG_RESOURCE);
1722     };
1723 };
1724
1725 IMPLEMENT_DYNAMIC_CLASS(wxPNGResourceHandler, wxBundleResourceHandler)
1726
1727 class WXDLLEXPORT wxJPEGResourceHandler: public wxBundleResourceHandler
1728 {
1729     DECLARE_DYNAMIC_CLASS(wxJPEGResourceHandler)
1730
1731 public:
1732     inline wxJPEGResourceHandler()
1733     {
1734         SetName(wxT("JPEG resource"));
1735         SetExtension("JPEG");
1736         SetType(wxBITMAP_TYPE_JPEG_RESOURCE);
1737     };
1738 };
1739
1740 IMPLEMENT_DYNAMIC_CLASS(wxJPEGResourceHandler, wxBundleResourceHandler)
1741
1742 bool wxBundleResourceHandler::LoadFile(wxBitmap *bitmap,
1743                                      const wxString& name,
1744                                      wxBitmapType WXUNUSED(type),
1745                                      int WXUNUSED(desiredWidth),
1746                                      int WXUNUSED(desiredHeight))
1747 {
1748     wxString ext = GetExtension().Lower();
1749     wxCFStringRef resname(name);
1750     wxCFStringRef restype(ext);
1751
1752     wxCFRef<CFURLRef> imageURL(CFBundleCopyResourceURL(CFBundleGetMainBundle(), resname, restype, NULL));
1753
1754     if ( imageURL.get() != NULL )
1755     {
1756         // Create the data provider object
1757         wxCFRef<CGDataProviderRef> provider(CGDataProviderCreateWithURL (imageURL) );
1758         CGImageRef image = NULL;
1759
1760         if ( ext == "jpeg" )
1761             image = CGImageCreateWithJPEGDataProvider (provider, NULL, true,
1762                                                    kCGRenderingIntentDefault);
1763         else if ( ext == "png" )
1764             image = CGImageCreateWithPNGDataProvider (provider, NULL, true,
1765                                                        kCGRenderingIntentDefault);
1766         if ( image != NULL )
1767         {
1768             bitmap->Create(image);
1769             CGImageRelease(image);
1770         }
1771     }
1772
1773     return false ;
1774 }
1775
1776 /* static */
1777 wxBitmap wxBitmapHelpers::NewFromPNGData(const void* data, size_t size)
1778 {
1779     wxCFRef<CGDataProviderRef>
1780         provider(CGDataProviderCreateWithData(NULL, data, size, NULL) );
1781     wxCFRef<CGImageRef>
1782         image(CGImageCreateWithPNGDataProvider(provider, NULL, true,
1783                                                 kCGRenderingIntentDefault));
1784
1785     return wxBitmap(image);
1786 }
1787
1788 void wxBitmap::InitStandardHandlers()
1789 {
1790 #if wxOSX_USE_COCOA_OR_CARBON
1791     AddHandler( new wxICONResourceHandler ) ;
1792 #endif
1793     AddHandler( new wxPNGResourceHandler );
1794     AddHandler( new wxJPEGResourceHandler );
1795 }
1796
1797 // ----------------------------------------------------------------------------
1798 // raw bitmap access support
1799 // ----------------------------------------------------------------------------
1800
1801 void *wxBitmap::GetRawData(wxPixelDataBase& data, int WXUNUSED(bpp))
1802 {
1803     if ( !IsOk() )
1804         // no bitmap, no data (raw or otherwise)
1805         return NULL;
1806
1807     data.m_width = GetWidth() ;
1808     data.m_height = GetHeight() ;
1809     data.m_stride = GetBitmapData()->GetBytesPerRow() ;
1810
1811     return BeginRawAccess() ;
1812 }
1813
1814 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(dataBase))
1815 {
1816     EndRawAccess() ;
1817 }
1818
1819 void wxBitmap::UseAlpha()
1820 {
1821     // remember that we are using alpha channel:
1822     // we'll need to create a proper mask in UngetRawData()
1823     M_BITMAPDATA->UseAlpha( true );
1824 }