src/mac/carbon/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "bitmap.h"
  14 #endif
  15
  16 #include "wx/wxprec.h"
  17
  18 #include "wx/bitmap.h"
  19 #include "wx/icon.h"
  20 #include "wx/log.h"
  21 #include "wx/image.h"
  22 #include "wx/metafile.h"
  23 #include "wx/xpmdecod.h"
  24
  25 #include "wx/rawbmp.h"
  26
  27 IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
  28 IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
  29 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject )
  30
  31 #ifdef __DARWIN__
  32     #include <ApplicationServices/ApplicationServices.h>
  33 #else
  34     #include <PictUtils.h>
  35 #endif
  36
  37 #include "wx/mac/uma.h"
  38
  39 #include "wx/dcmemory.h"
  40
  41 // Implementation Notes
  42 // --------------------
  43 //
  44 // we are always working with a 32 bit deep pixel buffer
  45 // under QuickDraw its alpha parts are going to be ignored in the GWorld,
  46 // therefore we have a separate GWorld there for blitting the mask in
  47
  48 // under Quartz then content is transformed into a CGImageRef representing the same data
  49 // which can be transferred to the GPU by the OS for fast rendering
  50
  51 // we don't dare premultiplied alpha yet
  52 #define wxMAC_USE_PREMULTIPLIED_ALPHA 0
  53
  54 IconFamilyHandle wxMacCreateIconFamily(const wxBitmap& bitmap)
  55 {
  56     wxBitmap bmp = bitmap ;
  57     // setup the header properly
  58
  59     IconFamilyHandle iconFamily = (IconFamilyHandle) NewHandle(8) ;
  60     (**iconFamily).resourceType = kIconFamilyType ;
  61     (**iconFamily).resourceSize = sizeof(OSType) + sizeof(Size);
  62
  63     int w = bmp.GetWidth() ;
  64     int h = bmp.GetHeight() ;
  65     int sz = wxMax( w , h ) ;
  66
  67     OSType dataType = 0 ;
  68     OSType maskType = 0 ;
  69
  70     if ( sz == 64 )
  71     {
  72         bmp = wxBitmap( bitmap.ConvertToImage().Scale( 128 , 128 ) ) ;
  73         sz = 128 ;
  74         h = w = 128 ;
  75     }
  76     else if ( sz == 24 )
  77     {
  78         bmp = wxBitmap( bitmap.ConvertToImage().Scale( 48 , 48 ) ) ;
  79         sz = 48 ;
  80         h = w = 48 ;
  81     }
  82
  83     if ( sz == 128 )
  84     {
  85         dataType = kThumbnail32BitData ;
  86         maskType = kThumbnail8BitMask ;
  87     }
  88     else if ( sz == 48 )
  89     {
  90         dataType = kHuge32BitData ;
  91         maskType = kHuge8BitMask ;
  92     }
  93     else if ( sz == 32 )
  94     {
  95         dataType = kLarge32BitData ;
  96         maskType = kLarge8BitMask ;
  97     }
  98     else if ( sz == 16 )
  99     {
 100         dataType = kSmall32BitData ;
 101         maskType = kSmall8BitMask ;
 102     }
 103
 104     if ( dataType != 0 )
 105     {
 106         Handle data = NULL ;
 107         Handle maskdata = NULL ;
 108         unsigned char * maskptr = NULL ;
 109         unsigned char * ptr = NULL ;
 110         size_t size ;
 111         size_t masksize ;
 112
 113         size = sz * sz * 4 ;
 114         data = NewHandle( size) ;
 115         HLock( data ) ;
 116         ptr = (unsigned char*) *data ;
 117         memset( ptr , 0, size ) ;
 118
 119         masksize = sz * sz ;
 120         maskdata = NewHandle( masksize ) ;
 121         HLock( maskdata ) ;
 122         maskptr = (unsigned char*) *maskdata ;
 123         memset( maskptr , 0 , masksize ) ;
 124
 125         bool hasAlpha = bmp.HasAlpha() ;
 126         wxMask *mask = bmp.GetMask() ;
 127         unsigned char * source = (unsigned char*) bmp.GetRawAccess() ;
 128         unsigned char * masksource = mask ? (unsigned char*) mask->GetRawAccess() : NULL ;
 129         for ( int y = 0 ; y < h ; ++y )
 130         {
 131             unsigned char * dest = ptr + y * sz * 4 ;
 132             unsigned char * maskdest = maskptr + y * sz ;
 133             for ( int x = 0 ; x < w ; ++x )
 134             {
 135                 unsigned char a = *source ++ ;
 136                 unsigned char r = *source ++ ;
 137                 unsigned char g = *source ++ ;
 138                 unsigned char b = *source ++ ;
 139
 140                 *dest++ = 0 ;
 141                 *dest++ = r ;
 142                 *dest++ = g ;
 143                 *dest++ = b ;
 144
 145                 if ( mask )
 146                     *maskdest++ = *masksource++ ;
 147                 else if ( hasAlpha )
 148                     *maskdest++ = a ;
 149                 else
 150                     *maskdest++ = 0xFF ;
 151             }
 152         }
 153
 154         OSStatus err = SetIconFamilyData( iconFamily, dataType , data ) ;
 155         wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 156
 157         err = SetIconFamilyData( iconFamily, maskType , maskdata ) ;
 158         wxASSERT_MSG( err == noErr , wxT("Error when adding mask") ) ;
 159         HUnlock( data ) ;
 160         HUnlock( maskdata ) ;
 161         DisposeHandle( data ) ;
 162         DisposeHandle( maskdata ) ;
 163     }
 164     else
 165     {
 166         PicHandle pic = wxMacCreatePicHandle( bitmap ) ;
 167         SetIconFamilyData( iconFamily, 'PICT' , (Handle) pic ) ;
 168         KillPicture( pic ) ;
 169     }
 170     return iconFamily ;
 171 }
 172
 173 IconRef wxMacCreateIconRef(const wxBitmap& bmp)
 174 {
 175     IconFamilyHandle iconFamily = wxMacCreateIconFamily( bmp ) ;
 176     if ( iconFamily == NULL )
 177         return NULL ;
 178
 179     IconRef iconRef ;
 180     static int iconCounter = 2 ;
 181
 182     OSStatus err = RegisterIconRefFromIconFamily( 'WXNG' , (OSType) iconCounter, iconFamily, &iconRef ) ;
 183     UInt16 owners ;
 184     err = GetIconRefOwners(iconRef , &owners ) ;
 185
 186     wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 187     // we have to retain a reference, as Unregister will decrement it
 188     AcquireIconRef( iconRef ) ;
 189     UnregisterIconRef( 'WXNG' , (OSType) iconCounter ) ;
 190     DisposeHandle( (Handle) iconFamily ) ;
 191     ++iconCounter ;
 192
 193     return iconRef ;
 194 }
 195
 196 PicHandle wxMacCreatePicHandle( const wxBitmap &bmp )
 197 {
 198     CGrafPtr        origPort = NULL ;
 199     GDHandle        origDev = NULL ;
 200     PicHandle       pict = NULL ;
 201     GWorldPtr       wp = NULL ;
 202     GWorldPtr       mask = NULL ;
 203     int height = bmp.GetHeight() ;
 204     int width = bmp.GetWidth() ;
 205
 206     Rect rect = { 0 , 0 , height , width } ;
 207
 208     GetGWorld( &origPort , &origDev ) ;
 209
 210     wp = (GWorldPtr) bmp.GetHBITMAP( (WXHBITMAP*) &mask ) ;
 211
 212     RgnHandle clipRgn = NULL ;
 213
 214     if ( mask )
 215     {
 216         GWorldPtr monoworld ;
 217         clipRgn = NewRgn() ;
 218         OSStatus err = NewGWorld( &monoworld , 1 , &rect , NULL , NULL , 0 ) ;
 219         verify_noerr(err) ;
 220         LockPixels( GetGWorldPixMap( monoworld ) ) ;
 221         LockPixels( GetGWorldPixMap( mask ) ) ;
 222         SetGWorld( monoworld , NULL ) ;
 223         RGBColor       white = { 0xffff ,0xffff , 0xffff } ;
 224         RGBColor       black = { 0x0000 ,0x0000 , 0x0000 } ;
 225         RGBForeColor( &black ) ;
 226         RGBBackColor( &white ) ;
 227         CopyBits(GetPortBitMapForCopyBits(mask),
 228                 GetPortBitMapForCopyBits(monoworld),
 229                 &rect,
 230                 &rect,
 231                 srcCopy,NULL);
 232         BitMapToRegion( clipRgn , (BitMap*) *GetGWorldPixMap( monoworld ) ) ;
 233         UnlockPixels( GetGWorldPixMap( monoworld ) ) ;
 234         UnlockPixels( GetGWorldPixMap( mask ) ) ;
 235         DisposeGWorld( monoworld ) ;
 236     }
 237
 238     SetGWorld( wp , NULL ) ;
 239     Rect portRect ;
 240     GetPortBounds( wp , &portRect ) ;
 241     pict = OpenPicture(&portRect);
 242
 243     if(pict)
 244     {
 245         RGBColor       white = { 0xffff ,0xffff , 0xffff } ;
 246         RGBColor       black = { 0x0000 ,0x0000 , 0x0000 } ;
 247         RGBForeColor( &black ) ;
 248         RGBBackColor( &white ) ;
 249
 250         if ( clipRgn )
 251             SetClip( clipRgn ) ;
 252
 253         LockPixels( GetGWorldPixMap( wp ) ) ;
 254         CopyBits(GetPortBitMapForCopyBits(wp),
 255                 GetPortBitMapForCopyBits(wp),
 256                 &portRect,
 257                 &portRect,
 258                 srcCopy,clipRgn);
 259         UnlockPixels( GetGWorldPixMap( wp ) ) ;
 260         ClosePicture();
 261     }
 262     SetGWorld( origPort , origDev ) ;
 263     if ( clipRgn )
 264         DisposeRgn( clipRgn ) ;
 265
 266     return pict;
 267 }
 268
 269 void wxMacCreateBitmapButton( ControlButtonContentInfo*info , const wxBitmap& bitmap , int forceType )
 270 {
 271     memset( info , 0 , sizeof(ControlButtonContentInfo) ) ;
 272     if ( bitmap.Ok() )
 273     {
 274         wxBitmapRefData * bmap = (wxBitmapRefData*) ( bitmap.GetRefData()) ;
 275         if ( bmap == NULL )
 276             return ;
 277         info->contentType = kControlContentIconRef ;
 278         info->u.iconRef = wxMacCreateIconRef( bitmap ) ;
 279         wxASSERT_MSG( info->u.iconRef , wxT("Converting to IconRef not possible") ) ;
 280 #if wxMAC_USE_CORE_GRAPHICS
 281         /*
 282             // only on 10.4 more controls will accept a CGImage
 283
 284             info->contentType = kControlContentCGImageRef ;
 285             info->u.imageRef = (CGImageRef) bmap->CGImageCreate() ;
 286         */
 287 #endif
 288     }
 289 }
 290
 291 void wxMacReleaseBitmapButton( ControlButtonContentInfo*info )
 292 {
 293     if ( info->contentType == kControlContentIconRef )
 294     {
 295         ReleaseIconRef(info->u.iconRef) ;
 296     }
 297 #if wxMAC_USE_CORE_GRAPHICS && MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2
 298     else if ( info->contentType == kControlContentCGImageRef )
 299     {
 300         CGImageRelease( info->u.imageRef ) ;
 301     }
 302 #endif
 303     else
 304     {
 305         wxFAIL_MSG(wxT("Unexpected bitmap type") ) ;
 306     }
 307 }
 308
 309 #define M_BITMAPDATA ((wxBitmapRefData *)m_refData)
 310
 311 void wxBitmapRefData::Init()
 312 {
 313     m_width = 0 ;
 314     m_height = 0 ;
 315     m_depth = 0 ;
 316     m_ok = false ;
 317     m_bitmapMask = NULL ;
 318 #if wxMAC_USE_CORE_GRAPHICS
 319     m_cgImageRef = NULL ;
 320 #endif
 321     m_hBitmap = NULL ;
 322     m_hMaskBitmap = NULL;
 323     m_maskBytesPerRow = NULL ;
 324
 325     m_rawAccessCount = 0 ;
 326     m_hasAlpha = false;
 327 }
 328
 329 wxBitmapRefData::wxBitmapRefData()
 330 {
 331     Init() ;
 332 }
 333
 334 wxBitmapRefData::wxBitmapRefData( int w , int h , int d )
 335 {
 336     Init() ;
 337     Create( w , h , d ) ;
 338 }
 339
 340 bool wxBitmapRefData::Create( int w , int h , int d )
 341 {
 342     m_width = w ;
 343     m_height = h ;
 344     m_depth = d ;
 345
 346     m_bytesPerRow = w * 4 ;
 347     size_t size = m_bytesPerRow * h ;
 348     void*  data = m_memBuf.GetWriteBuf(size) ;
 349     memset( data ,  0 , size) ;
 350     m_memBuf.UngetWriteBuf(size) ;
 351
 352     m_hBitmap = NULL ;
 353     Rect rect = { 0 , 0 , m_height , m_width } ;
 354     verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_hBitmap , k32ARGBPixelFormat , &rect , NULL , NULL , 0 ,
 355         (char*) data , m_bytesPerRow ) ) ;
 356     wxASSERT_MSG( m_hBitmap , wxT("Unable to create GWorld context") ) ;
 357     m_ok = ( m_hBitmap != NULL ) ;
 358
 359     return m_ok ;
 360 }
 361
 362 void wxBitmapRefData::UseAlpha( bool use )
 363 {
 364     if ( m_hasAlpha == use )
 365         return ;
 366
 367     m_hasAlpha = use ;
 368     if ( m_hasAlpha )
 369     {
 370         int width = GetWidth() ;
 371         int height = GetHeight() ;
 372         m_maskBytesPerRow = ( width * 4 + 3 ) & 0xFFFFFFC ;
 373         size_t size = height * m_maskBytesPerRow ;
 374         unsigned char * data = (unsigned char * ) m_maskMemBuf.GetWriteBuf( size ) ;
 375         memset( data , 0 , size ) ;
 376         wxASSERT( m_hMaskBitmap == NULL ) ;
 377         Rect rect = { 0 , 0 , height , width } ;
 378         verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_hMaskBitmap , k32ARGBPixelFormat , &rect , NULL , NULL , 0 ,
 379             (char*) data , m_maskBytesPerRow ) ) ;
 380         wxASSERT_MSG( m_hMaskBitmap , wxT("Unable to create GWorld context for alpha mask") ) ;
 381         m_maskMemBuf.UngetWriteBuf(size) ;
 382 #if !wxMAC_USE_CORE_GRAPHICS
 383         UpdateAlphaMask() ;
 384 #endif
 385     }
 386     else
 387     {
 388         DisposeGWorld( m_hMaskBitmap ) ;
 389         m_hMaskBitmap = NULL ;
 390         m_maskBytesPerRow = 0 ;
 391     }
 392 }
 393
 394 void *wxBitmapRefData::GetRawAccess() const
 395 {
 396     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
 397     return m_memBuf.GetData() ;
 398 }
 399
 400 void *wxBitmapRefData::BeginRawAccess()
 401 {
 402     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") ) ;
 403     wxASSERT( m_rawAccessCount == 0 ) ;
 404     ++m_rawAccessCount ;
 405 #if wxMAC_USE_CORE_GRAPHICS
 406      // we must destroy an existing cached image, as
 407     // the bitmap data may change now
 408     if ( m_cgImageRef )
 409     {
 410         CGImageRelease( m_cgImageRef ) ;
 411         m_cgImageRef = NULL ;
 412     }
 413 #endif
 414     return m_memBuf.GetData() ;
 415 }
 416
 417 void wxBitmapRefData::EndRawAccess()
 418 {
 419     wxCHECK_RET( Ok() , wxT("invalid bitmap") ) ;
 420     wxASSERT( m_rawAccessCount == 1 ) ;
 421     --m_rawAccessCount ;
 422 #if !wxMAC_USE_CORE_GRAPHICS
 423     UpdateAlphaMask() ;
 424 #endif
 425 }
 426
 427
 428 #if wxMAC_USE_CORE_GRAPHICS
 429 void wxMacMemoryBufferReleaseProc(void *info, const void *data, size_t size)
 430 {
 431     wxMemoryBuffer* membuf = (wxMemoryBuffer*) info ;
 432     wxASSERT( data == membuf->GetData() ) ;
 433     delete membuf ;
 434 }
 435
 436 CGImageRef wxBitmapRefData::CGImageCreate() const
 437 {
 438     wxASSERT( m_ok ) ;
 439     wxASSERT( m_rawAccessCount >= 0 ) ;
 440     CGImageRef image ;
 441     if ( m_rawAccessCount > 0 || m_cgImageRef == NULL )
 442     {
 443         size_t imageSize = m_width * m_height * 4 ;
 444         void * dataBuffer = m_memBuf.GetData() ;
 445         int w = m_width ;
 446         int h = m_height ;
 447         CGImageAlphaInfo alphaInfo = kCGImageAlphaNoneSkipFirst ;
 448         wxMemoryBuffer* membuf = NULL ;
 449
 450         if ( m_bitmapMask )
 451         {
 452             membuf = new wxMemoryBuffer( imageSize ) ;
 453             memcpy( membuf->GetData() , dataBuffer , imageSize ) ;
 454             unsigned char *sourcemaskstart = (unsigned char *) m_bitmapMask->GetRawAccess() ;
 455             int maskrowbytes = m_bitmapMask->GetBytesPerRow() ;
 456             unsigned char *destalpha = (unsigned char *) membuf->GetData() ;
 457             alphaInfo = kCGImageAlphaFirst ;
 458             for ( int y = 0 ; y < h ; ++y , sourcemaskstart += maskrowbytes)
 459             {
 460                 unsigned char *sourcemask = sourcemaskstart ;
 461                 for( int x = 0 ; x < w ; ++x , sourcemask++ , destalpha += 4 )
 462                 {
 463                     *destalpha = *sourcemask ;
 464                 }
 465             }
 466         }
 467         else if ( m_hasAlpha )
 468         {
 469 #if wxMAC_USE_PREMULTIPLIED_ALPHA
 470             alphaInfo = kCGImageAlphaPremultipliedFirst ;
 471 #else
 472             alphaInfo = kCGImageAlphaFirst ;
 473 #endif
 474             membuf = new wxMemoryBuffer( m_memBuf ) ;
 475         }
 476         else
 477         {
 478             membuf = new wxMemoryBuffer( m_memBuf ) ;
 479         }
 480         CGColorSpaceRef colorSpace = wxMacGetGenericRGBColorSpace();
 481         CGDataProviderRef dataProvider =
 482             CGDataProviderCreateWithData( membuf , (const void *)membuf->GetData() , imageSize,
 483                 wxMacMemoryBufferReleaseProc );
 484         image =
 485             ::CGImageCreate( w, h, 8 , 32 , 4 * m_width , colorSpace, alphaInfo ,
 486                         dataProvider, NULL , false , kCGRenderingIntentDefault );
 487         CGDataProviderRelease( dataProvider);
 488     }
 489     else
 490     {
 491         image = m_cgImageRef ;
 492         CGImageRetain( image ) ;
 493     }
 494     if ( m_rawAccessCount == 0 && m_cgImageRef == NULL)
 495     {
 496         // we keep it for later use
 497         m_cgImageRef = image ;
 498         CGImageRetain( image ) ;
 499     }
 500     return image ;
 501 }
 502 #endif
 503
 504 GWorldPtr wxBitmapRefData::GetHBITMAP(GWorldPtr* mask) const
 505 {
 506     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 507     if ( mask )
 508     {
 509         *mask = NULL ;
 510         if ( m_bitmapMask )
 511             *mask = (GWorldPtr) m_bitmapMask->GetHBITMAP() ;
 512         else if ( m_hasAlpha )
 513         {
 514 #if !wxMAC_USE_CORE_GRAPHICS
 515             if ( m_rawAccessCount > 0 )
 516                 UpdateAlphaMask() ;
 517 #else
 518             // this structure is not kept in synch when using CG, so if someone
 519             // is really accessing the Graphports, we have to sync it
 520             UpdateAlphaMask() ;
 521 #endif
 522             *mask = m_hMaskBitmap ;
 523         }
 524     }
 525     return m_hBitmap ;
 526 }
 527
 528 void wxBitmapRefData::UpdateAlphaMask() const
 529 {
 530     if ( m_hasAlpha )
 531     {
 532         unsigned char *sourcemask = (unsigned char *) GetRawAccess() ;
 533         unsigned char *destalphabase = (unsigned char *) m_maskMemBuf.GetData() ;
 534
 535         int h = GetHeight() ;
 536         int w = GetWidth() ;
 537
 538         for ( int y = 0 ; y < h ; ++y , destalphabase += m_maskBytesPerRow )
 539         {
 540             unsigned char* destalpha = destalphabase ;
 541             for( int x = 0 ; x < w ; ++x , sourcemask += 4 )
 542             {
 543                 // we must have 24 bit depth for non quartz smooth alpha
 544                 *destalpha++ = 255 ;
 545                 *destalpha++ = 255  - *sourcemask ;
 546                 *destalpha++ = 255  - *sourcemask ;
 547                 *destalpha++ = 255  - *sourcemask ;
 548             }
 549         }
 550     }
 551 }
 552
 553 void wxBitmapRefData::Free()
 554 {
 555     wxASSERT_MSG( m_rawAccessCount == 0 , wxT("Bitmap still selected when destroyed") ) ;
 556
 557 #if wxMAC_USE_CORE_GRAPHICS
 558     if ( m_cgImageRef )
 559     {
 560         CGImageRelease( m_cgImageRef ) ;
 561         m_cgImageRef = NULL ;
 562     }
 563 #endif
 564     if ( m_hBitmap )
 565     {
 566         DisposeGWorld( MAC_WXHBITMAP(m_hBitmap) ) ;
 567         m_hBitmap = NULL ;
 568     }
 569     if ( m_hMaskBitmap )
 570     {
 571         DisposeGWorld( MAC_WXHBITMAP(m_hMaskBitmap) ) ;
 572         m_hMaskBitmap = NULL ;
 573     }
 574
 575     if (m_bitmapMask)
 576     {
 577         delete m_bitmapMask;
 578         m_bitmapMask = NULL;
 579     }
 580 }
 581
 582 wxBitmapRefData::~wxBitmapRefData()
 583 {
 584     Free() ;
 585 }
 586
 587 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 588 {
 589     int w = icon.GetWidth() ;
 590     int h = icon.GetHeight() ;
 591     Create( icon.GetWidth() , icon.GetHeight() ) ;
 592
 593     if ( w == h && ( w == 16 || w == 32 || w == 48 || w == 128 ) )
 594     {
 595         IconFamilyHandle iconFamily = NULL ;
 596         Handle imagehandle = NewHandle(0) ;
 597         Handle maskhandle = NewHandle(0) ;
 598
 599         OSType maskType = 0;
 600         OSType dataType = 0;
 601         IconSelectorValue selector = 0 ;
 602         if ( w == 128 )
 603         {
 604             dataType = kThumbnail32BitData ;
 605             maskType = kThumbnail8BitMask ;
 606             selector = kSelectorAllAvailableData ;
 607         }
 608         else if ( w == 48 )
 609         {
 610             dataType = kHuge32BitData ;
 611             maskType = kHuge8BitMask ;
 612             selector = kSelectorHuge32Bit | kSelectorHuge8BitMask ;
 613         }
 614         else if ( w == 32 )
 615         {
 616             dataType = kLarge32BitData ;
 617             maskType = kLarge8BitMask ;
 618             selector = kSelectorLarge32Bit | kSelectorLarge8BitMask ;
 619         }
 620         else if ( w == 16 )
 621         {
 622             dataType = kSmall32BitData ;
 623             maskType = kSmall8BitMask ;
 624             selector = kSelectorSmall32Bit | kSelectorSmall8BitMask ;
 625         }
 626         else
 627         {
 628             wxFAIL_MSG(wxT("Illegal icon size for conversion") ) ;
 629         }
 630
 631
 632         OSStatus err = ( IconRefToIconFamily( MAC_WXHICON(icon.GetHICON()) , selector , &iconFamily ) ) ;
 633
 634         err =( GetIconFamilyData( iconFamily , dataType , imagehandle ) ) ;
 635         err =( GetIconFamilyData( iconFamily , maskType , maskhandle ) ) ;
 636         wxASSERT( GetHandleSize( imagehandle ) == w * 4 * h ) ;
 637         wxASSERT( GetHandleSize( maskhandle ) == w * h ) ;
 638         UseAlpha() ;
 639         unsigned char *source = (unsigned char *) *imagehandle ;
 640         unsigned char *sourcemask = (unsigned char *) *maskhandle ;
 641
 642         unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 643         for ( int y = 0 ; y < h ; ++y )
 644         {
 645             for ( int x = 0 ; x < w ; ++x )
 646             {
 647                 *destination++ = *sourcemask++ ;
 648                 source++ ;
 649                 *destination++ = *source++ ;
 650                 *destination++ = *source++ ;
 651                 *destination++ = *source++ ;
 652             }
 653         }
 654         EndRawAccess() ;
 655         DisposeHandle( imagehandle ) ;
 656         DisposeHandle( maskhandle ) ;
 657     }
 658     else
 659     {
 660         wxMemoryDC dc ;
 661         dc.SelectObject( *this ) ;
 662         dc.DrawIcon( icon , 0 , 0 ) ;
 663         dc.SelectObject( wxNullBitmap ) ;
 664     }
 665     return true;
 666 }
 667
 668 wxBitmap::wxBitmap()
 669 {
 670 }
 671
 672 wxBitmap::~wxBitmap()
 673 {
 674 }
 675
 676 wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
 677 {
 678     m_refData = new wxBitmapRefData( the_width , the_height , no_bits ) ;
 679
 680     if ( no_bits == 1 )
 681     {
 682         int linesize = ( the_width / (sizeof(unsigned char) * 8)) ;
 683         if ( the_width % (sizeof(unsigned char) * 8) ) {
 684             linesize += sizeof(unsigned char);
 685         }
 686         unsigned char* linestart = (unsigned char*) bits ;
 687         unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 688         for ( int y = 0 ; y < the_height ; ++y , linestart += linesize )
 689         {
 690             for ( int x = 0 ; x < the_width ; ++x )
 691             {
 692                 int index = x / 8 ;
 693                 int bit = x % 8 ;
 694                 int mask = 1 << bit ;
 695                 if ( linestart[index] & mask )
 696                 {
 697                     *destination++ = 0xFF ;
 698                     *destination++ = 0 ;
 699                     *destination++ = 0 ;
 700                     *destination++ = 0 ;
 701                 }
 702                 else
 703                 {
 704                     *destination++ = 0xFF ;
 705                     *destination++ = 0xFF ;
 706                     *destination++ = 0xFF ;
 707                     *destination++ = 0xFF ;
 708                 }
 709             }
 710         }
 711         EndRawAccess() ;
 712     }
 713     else
 714     {
 715         wxFAIL_MSG(wxT("multicolor BITMAPs not yet implemented"));
 716     }
 717 }
 718
 719 wxBitmap::wxBitmap(int w, int h, int d)
 720 {
 721     (void)Create(w, h, d);
 722 }
 723
 724 wxBitmap::wxBitmap(void *data, wxBitmapType type, int width, int height, int depth)
 725 {
 726     (void) Create(data, type, width, height, depth);
 727 }
 728
 729 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
 730 {
 731     LoadFile(filename, type);
 732 }
 733
 734 wxBitmap::wxBitmap(const char **bits)
 735 {
 736     (void) CreateFromXpm(bits);
 737 }
 738
 739 wxBitmap::wxBitmap(char **bits)
 740 {
 741     (void) CreateFromXpm((const char **)bits);
 742 }
 743
 744 void* wxBitmap::GetRawAccess() const
 745 {
 746     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 747     return M_BITMAPDATA->GetRawAccess() ;
 748 }
 749
 750 void* wxBitmap::BeginRawAccess()
 751 {
 752     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 753     return M_BITMAPDATA->BeginRawAccess() ;
 754 }
 755
 756 void wxBitmap::EndRawAccess()
 757 {
 758     wxCHECK_RET( Ok() , wxT("invalid bitmap") ) ;
 759     M_BITMAPDATA->EndRawAccess() ;
 760 }
 761
 762 bool wxBitmap::CreateFromXpm(const char **bits)
 763 {
 764     wxCHECK_MSG( bits != NULL, FALSE, wxT("invalid bitmap data") )
 765     wxXPMDecoder decoder;
 766     wxImage img = decoder.ReadData(bits);
 767     wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") )
 768     *this = wxBitmap(img);
 769     return TRUE;
 770 }
 771
 772 #if wxMAC_USE_CORE_GRAPHICS
 773 WXCGIMAGEREF wxBitmap::CGImageCreate() const
 774 {
 775     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
 776     return M_BITMAPDATA->CGImageCreate() ;
 777 }
 778 #endif
 779
 780 wxBitmap wxBitmap::GetSubBitmap(const wxRect &rect) const
 781 {
 782     wxCHECK_MSG( Ok() &&
 783                 (rect.x >= 0) && (rect.y >= 0) &&
 784                 (rect.x+rect.width <= GetWidth()) &&
 785                 (rect.y+rect.height <= GetHeight()),
 786                 wxNullBitmap, wxT("invalid bitmap or bitmap region") );
 787
 788
 789     wxBitmap ret( rect.width, rect.height, GetDepth() );
 790     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 791
 792
 793     int sourcewidth = GetWidth() ;
 794     int destwidth = rect.width ;
 795     int destheight = rect.height ;
 796     {
 797         unsigned char * sourcedata = (unsigned char*) GetRawAccess() ;
 798         unsigned char * destdata = (unsigned char*) ret.BeginRawAccess() ;
 799         int sourcelinesize = sourcewidth * 4 ;
 800         int destlinesize = destwidth * 4 ;
 801         unsigned char *source = sourcedata + rect.x * 4 + rect.y * sourcelinesize ;
 802         unsigned char *dest = destdata ;
 803         for(int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
 804         {
 805             memcpy( dest , source , destlinesize ) ;
 806         }
 807     }
 808     ret.EndRawAccess() ;
 809
 810     if ( M_BITMAPDATA->m_bitmapMask )
 811     {
 812         wxMemoryBuffer maskbuf ;
 813         int rowBytes = ( destwidth + 3 ) & 0xFFFFFFC ;
 814         size_t maskbufsize = rowBytes * destheight ;
 815         unsigned char * destdata = (unsigned char * ) maskbuf.GetWriteBuf( maskbufsize ) ;
 816
 817         int sourcelinesize = M_BITMAPDATA->m_bitmapMask->GetBytesPerRow()  ;
 818         int destlinesize = rowBytes ;
 819         unsigned char *source = (unsigned char *) M_BITMAPDATA->m_bitmapMask->GetRawAccess() ;
 820         source += rect.x + rect.y * sourcelinesize ;
 821         unsigned char *dest = destdata ;
 822
 823         for(int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
 824         {
 825             memcpy( dest , source , destlinesize ) ;
 826         }
 827         maskbuf.UngetWriteBuf( maskbufsize ) ;
 828         ret.SetMask( new wxMask( maskbuf , destwidth , destheight , rowBytes ) ) ;
 829     }
 830     else if ( HasAlpha() )
 831         ret.UseAlpha() ;
 832
 833     return ret;
 834 }
 835
 836 bool wxBitmap::Create(int w, int h, int d)
 837 {
 838     UnRef();
 839
 840     if ( d < 0 )
 841         d = wxDisplayDepth() ;
 842
 843     m_refData = new wxBitmapRefData( w , h , d );
 844
 845     return M_BITMAPDATA->Ok() ;
 846 }
 847
 848 bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
 849 {
 850     UnRef();
 851
 852     wxBitmapHandler *handler = FindHandler(type);
 853
 854     if ( handler )
 855     {
 856         m_refData = new wxBitmapRefData;
 857
 858         return handler->LoadFile(this, filename, type, -1, -1);
 859     }
 860     else
 861     {
 862         wxImage loadimage(filename, type);
 863         if (loadimage.Ok()) {
 864             *this = loadimage;
 865             return true;
 866         }
 867     }
 868     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
 869     return false;
 870 }
 871
 872 bool wxBitmap::Create(void *data, wxBitmapType type, int width, int height, int depth)
 873 {
 874     UnRef();
 875
 876     m_refData = new wxBitmapRefData;
 877
 878     wxBitmapHandler *handler = FindHandler(type);
 879
 880     if ( handler == NULL ) {
 881         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
 882
 883         return FALSE;
 884     }
 885
 886     return handler->Create(this, data, type, width, height, depth);
 887 }
 888
 889 wxBitmap::wxBitmap(const wxImage& image, int depth)
 890 {
 891     wxCHECK_RET( image.Ok(), wxT("invalid image") )
 892
 893     // width and height of the device-dependent bitmap
 894     int width = image.GetWidth();
 895     int height = image.GetHeight();
 896
 897     m_refData = new wxBitmapRefData( width , height , depth ) ;;
 898
 899     // Create picture
 900
 901     bool hasAlpha = false ;
 902
 903     if ( image.HasMask() )
 904     {
 905         // takes precedence, don't mix with alpha info
 906     }
 907     else
 908     {
 909         hasAlpha = image.HasAlpha() ;
 910     }
 911
 912     if ( hasAlpha )
 913         UseAlpha() ;
 914
 915     unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 916
 917     register unsigned char* data = image.GetData();
 918     const unsigned char *alpha = hasAlpha ? image.GetAlpha() : NULL ;
 919     for (int y = 0; y < height; y++)
 920     {
 921         for (int x = 0; x < width; x++)
 922         {
 923             if ( hasAlpha )
 924             {
 925                 const unsigned char a = *alpha++;
 926                 *destination++ = a ;
 927 #if wxMAC_USE_PREMULTIPLIED_ALPHA
 928                 *destination++ = ((*data++) * a + 127 ) / 255 ;
 929                 *destination++ = ((*data++) * a + 127 ) / 255 ;
 930                 *destination++ = ((*data++) * a + 127 ) / 255 ;
 931 #else
 932                 *destination++ = *data++ ;
 933                 *destination++ = *data++ ;
 934                 *destination++ = *data++ ;
 935 #endif
 936             }
 937             else
 938             {
 939                 *destination++ = 0xFF ;
 940                 *destination++ = *data++ ;
 941                 *destination++ = *data++ ;
 942                 *destination++ = *data++ ;
 943             }
 944         }
 945     }
 946     EndRawAccess() ;
 947     if ( image.HasMask() )
 948     {
 949         SetMask( new wxMask( *this , wxColour( image.GetMaskRed() , image.GetMaskGreen() , image.GetMaskBlue() ) ) ) ;
 950     }
 951 }
 952
 953 wxImage wxBitmap::ConvertToImage() const
 954 {
 955     wxImage image;
 956
 957     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 958
 959     // create an wxImage object
 960     int width = GetWidth();
 961     int height = GetHeight();
 962     image.Create( width, height );
 963
 964     unsigned char *data = image.GetData();
 965     wxCHECK_MSG( data, wxNullImage, wxT("Could not allocate data for image") );
 966
 967     unsigned char* source = (unsigned char*) GetRawAccess() ;
 968
 969     bool hasAlpha = false ;
 970     bool hasMask = false ;
 971     unsigned char *alpha = NULL ;
 972     unsigned char *mask = NULL ;
 973     if ( HasAlpha() )
 974     {
 975         hasAlpha = true ;
 976     }
 977
 978     if ( GetMask() )
 979     {
 980         hasMask = true ;
 981         mask = (unsigned char*) GetMask()->GetRawAccess() ;
 982     }
 983
 984     if ( hasAlpha )
 985     {
 986         image.SetAlpha() ;
 987         alpha = image.GetAlpha() ;
 988     }
 989     int index = 0;
 990
 991     // The following masking algorithm is the same as well in msw/gtk:
 992     // the colour used as transparent one in wxImage and the one it is
 993     // replaced with when it really occurs in the bitmap
 994     static const int MASK_RED = 1;
 995     static const int MASK_GREEN = 2;
 996     static const int MASK_BLUE = 3;
 997     static const int MASK_BLUE_REPLACEMENT = 2;
 998
 999     for (int yy = 0; yy < height; yy++)
1000     {
1001         for (int xx = 0; xx < width; xx++)
1002         {
1003             long color = *((long*) source) ;
1004             unsigned char a = ((color&0xFF000000) >> 24) ;
1005             unsigned char r = ((color&0x00FF0000) >> 16) ;
1006             unsigned char g = ((color&0x0000FF00) >> 8) ;
1007             unsigned char b = (color&0x000000FF);
1008             if ( hasMask )
1009             {
1010                 if ( *mask++ == 0 )
1011                 {
1012                     if ( r == MASK_RED && g == MASK_GREEN && b == MASK_BLUE )
1013                         b = MASK_BLUE_REPLACEMENT ;
1014                     else
1015                     {
1016                         r = MASK_RED ;
1017                         g = MASK_GREEN ;
1018                         b = MASK_BLUE ;
1019                     }
1020                 }
1021             }
1022             else if ( hasAlpha )
1023                 *alpha++ = a ;
1024
1025             data[index    ] = r ;
1026             data[index + 1] = g ;
1027             data[index + 2] = b ;
1028             index += 3;
1029             source += 4 ;
1030         }
1031     }
1032     if ( hasMask )
1033         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1034     return image;
1035 }
1036
1037
1038 bool wxBitmap::SaveFile(const wxString& filename, wxBitmapType type,
1039                         const wxPalette *palette) const
1040 {
1041     wxBitmapHandler *handler = FindHandler(type);
1042
1043     if ( handler )
1044     {
1045         return handler->SaveFile(this, filename, type, palette);
1046     }
1047     else
1048     {
1049         wxImage image = ConvertToImage();
1050
1051         return image.SaveFile(filename, type);
1052     }
1053
1054     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1055     return false;
1056 }
1057
1058 bool wxBitmap::Ok() const
1059 {
1060    return (M_BITMAPDATA && M_BITMAPDATA->Ok());
1061 }
1062
1063 int wxBitmap::GetHeight() const
1064 {
1065    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1066
1067    return M_BITMAPDATA->GetHeight();
1068 }
1069
1070 int wxBitmap::GetWidth() const
1071 {
1072    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1073
1074    return M_BITMAPDATA->GetWidth() ;
1075 }
1076
1077 int wxBitmap::GetDepth() const
1078 {
1079    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1080
1081    return M_BITMAPDATA->GetDepth();
1082 }
1083
1084 #if WXWIN_COMPATIBILITY_2_4
1085
1086 int wxBitmap::GetQuality() const
1087 {
1088     return 0;
1089 }
1090
1091 #endif
1092
1093 wxMask *wxBitmap::GetMask() const
1094 {
1095    wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1096
1097    return M_BITMAPDATA->m_bitmapMask;
1098 }
1099
1100 bool wxBitmap::HasAlpha() const
1101 {
1102    wxCHECK_MSG( Ok(), false , wxT("invalid bitmap") );
1103
1104    return M_BITMAPDATA->HasAlpha() ;
1105 }
1106
1107 void wxBitmap::SetWidth(int w)
1108 {
1109     if (!M_BITMAPDATA)
1110         m_refData = new wxBitmapRefData;
1111
1112     M_BITMAPDATA->SetWidth(w);
1113 }
1114
1115 void wxBitmap::SetHeight(int h)
1116 {
1117     if (!M_BITMAPDATA)
1118         m_refData = new wxBitmapRefData;
1119
1120     M_BITMAPDATA->SetHeight(h);
1121 }
1122
1123 void wxBitmap::SetDepth(int d)
1124 {
1125     if (!M_BITMAPDATA)
1126         m_refData = new wxBitmapRefData;
1127
1128     M_BITMAPDATA->SetDepth(d);
1129 }
1130
1131 #if WXWIN_COMPATIBILITY_2_4
1132
1133 void wxBitmap::SetQuality(int WXUNUSED(quality))
1134 {
1135 }
1136
1137 #endif
1138
1139 void wxBitmap::SetOk(bool isOk)
1140 {
1141     if (!M_BITMAPDATA)
1142         m_refData = new wxBitmapRefData;
1143
1144     M_BITMAPDATA->SetOk(isOk);
1145 }
1146
1147 #if wxUSE_PALETTE
1148 wxPalette *wxBitmap::GetPalette() const
1149 {
1150    wxCHECK_MSG( Ok(), NULL, wxT("Invalid bitmap  GetPalette()") );
1151
1152    return &M_BITMAPDATA->m_bitmapPalette;
1153 }
1154
1155 void wxBitmap::SetPalette(const wxPalette& palette)
1156 {
1157     if (!M_BITMAPDATA)
1158         m_refData = new wxBitmapRefData;
1159
1160     M_BITMAPDATA->m_bitmapPalette = palette ;
1161 }
1162 #endif // wxUSE_PALETTE
1163
1164 void wxBitmap::SetMask(wxMask *mask)
1165 {
1166     if (!M_BITMAPDATA)
1167         m_refData = new wxBitmapRefData;
1168
1169     // Remove existing mask if there is one.
1170     delete M_BITMAPDATA->m_bitmapMask;
1171
1172     M_BITMAPDATA->m_bitmapMask = mask ;
1173 }
1174
1175 WXHBITMAP wxBitmap::GetHBITMAP(WXHBITMAP* mask) const
1176 {
1177     return WXHBITMAP(M_BITMAPDATA->GetHBITMAP((GWorldPtr*)mask));
1178 }
1179
1180 // ----------------------------------------------------------------------------
1181 // wxMask
1182 // ----------------------------------------------------------------------------
1183
1184 wxMask::wxMask()
1185 {
1186     Init() ;
1187 }
1188
1189 // Construct a mask from a bitmap and a colour indicating
1190 // the transparent area
1191 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
1192 {
1193     Init() ;
1194     Create(bitmap, colour);
1195 }
1196
1197 // Construct a mask from a mono bitmap (copies the bitmap).
1198 wxMask::wxMask(const wxBitmap& bitmap)
1199 {
1200     Init() ;
1201     Create(bitmap);
1202 }
1203
1204 // Construct a mask from a mono bitmap (copies the bitmap).
1205 wxMask::wxMask(const wxMemoryBuffer& data, int width , int height , int bytesPerRow )
1206 {
1207     Init() ;
1208     Create(data, width , height , bytesPerRow );
1209 }
1210
1211 wxMask::~wxMask()
1212 {
1213     if ( m_maskBitmap )
1214     {
1215         DisposeGWorld( (GWorldPtr) m_maskBitmap ) ;
1216         m_maskBitmap = NULL ;
1217     }
1218 }
1219
1220 void wxMask::Init()
1221 {
1222     m_width = m_height = m_bytesPerRow = 0 ;
1223     m_maskBitmap = NULL ;
1224 }
1225
1226 void *wxMask::GetRawAccess() const
1227 {
1228     return m_memBuf.GetData() ;
1229 }
1230
1231 // this can be a k8IndexedGrayPixelFormat GWorld, because it never stores other values than black or white
1232 // so no rainbox colors will be created by QD when blitting
1233
1234 void wxMask::RealizeNative()
1235 {
1236     if ( m_maskBitmap )
1237     {
1238        DisposeGWorld(  (GWorldPtr) m_maskBitmap ) ;
1239        m_maskBitmap = NULL ;
1240     }
1241     Rect rect = { 0 , 0 , m_height , m_width } ;
1242     verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_maskBitmap , k8IndexedGrayPixelFormat , &rect , NULL , NULL , 0 ,
1243         (char*) m_memBuf.GetData() , m_bytesPerRow ) ) ;
1244 }
1245
1246 // Create a mask from a mono bitmap (copies the bitmap).
1247 bool wxMask::Create(const wxMemoryBuffer& data,int width , int height , int bytesPerRow)
1248 {
1249     m_memBuf = data ;
1250     m_width = width ;
1251     m_height = height ;
1252     m_bytesPerRow = bytesPerRow ;
1253     wxASSERT( data.GetDataLen() == (size_t)(height * bytesPerRow) ) ;
1254     RealizeNative() ;
1255     return true ;
1256 }
1257
1258 // Create a mask from a mono bitmap (copies the bitmap).
1259 bool wxMask::Create(const wxBitmap& bitmap)
1260 {
1261     m_width = bitmap.GetWidth() ;
1262     m_height = bitmap.GetHeight() ;
1263     m_bytesPerRow = ( m_width + 3 ) & 0xFFFFFFC ;
1264     size_t size = m_bytesPerRow * m_height ;
1265     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1266     memset( destdatabase , 0 , size ) ;
1267     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1268     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow )
1269     {
1270         unsigned char *destdata= destdatabase ;
1271         for( int x = 0 ; x < m_width ; ++x )
1272         {
1273             srcdata++ ;
1274             unsigned char r = *srcdata++ ;
1275             unsigned char g = *srcdata++ ;
1276             unsigned char b = *srcdata++ ;
1277             if ( ( r + g + b ) > 0x10 )
1278                 *destdata++ = 0x00 ;
1279             else
1280                 *destdata++ = 0xFF ;
1281         }
1282     }
1283     m_memBuf.UngetWriteBuf( size ) ;
1284     RealizeNative() ;
1285     return TRUE;
1286 }
1287
1288 // Create a mask from a bitmap and a colour indicating
1289 // the transparent area
1290 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1291 {
1292     m_width = bitmap.GetWidth() ;
1293     m_height = bitmap.GetHeight() ;
1294     m_bytesPerRow = ( m_width + 3 ) & 0xFFFFFFC ;
1295     size_t size = m_bytesPerRow * m_height ;
1296
1297     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1298     memset( destdatabase , 0 , size ) ;
1299     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1300     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow)
1301     {
1302         unsigned char *destdata= destdatabase ;
1303         for( int x = 0 ; x < m_width ; ++x )
1304         {
1305             srcdata++ ;
1306             unsigned char r = *srcdata++ ;
1307             unsigned char g = *srcdata++ ;
1308             unsigned char b = *srcdata++ ;
1309             if ( colour == wxColour( r , g , b) )
1310                 *destdata++ = 0x00 ;
1311             else
1312                 *destdata++ = 0xFF ;
1313         }
1314     }
1315     m_memBuf.UngetWriteBuf( size ) ;
1316     RealizeNative() ;
1317     return TRUE;
1318 }
1319
1320 WXHBITMAP wxMask::GetHBITMAP() const
1321 {
1322     return m_maskBitmap ;
1323 }
1324
1325 // ----------------------------------------------------------------------------
1326 // wxBitmapHandler
1327 // ----------------------------------------------------------------------------
1328
1329 wxBitmapHandler::~wxBitmapHandler()
1330 {
1331 }
1332
1333 bool wxBitmapHandler::Create(wxBitmap *bitmap, void *data, long type, int width, int height, int depth)
1334 {
1335     return FALSE;
1336 }
1337
1338 bool wxBitmapHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1339         int desiredWidth, int desiredHeight)
1340 {
1341     return FALSE;
1342 }
1343
1344 bool wxBitmapHandler::SaveFile(const wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette)
1345 {
1346     return FALSE;
1347 }
1348
1349 // ----------------------------------------------------------------------------
1350 // Standard Handlers
1351 // ----------------------------------------------------------------------------
1352
1353 class WXDLLEXPORT wxPICTResourceHandler: public wxBitmapHandler
1354 {
1355     DECLARE_DYNAMIC_CLASS(wxPICTResourceHandler)
1356 public:
1357     inline wxPICTResourceHandler()
1358     {
1359         SetName(wxT("Macintosh Pict resource"));
1360         SetExtension(wxEmptyString);
1361         SetType(wxBITMAP_TYPE_PICT_RESOURCE);
1362     };
1363
1364     virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1365           int desiredWidth, int desiredHeight);
1366 };
1367 IMPLEMENT_DYNAMIC_CLASS(wxPICTResourceHandler, wxBitmapHandler)
1368
1369
1370 bool  wxPICTResourceHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1371           int desiredWidth, int desiredHeight)
1372 {
1373 #if wxUSE_METAFILE
1374     Str255 theName ;
1375     wxMacStringToPascal( name , theName ) ;
1376
1377     PicHandle thePict = (PicHandle ) GetNamedResource( 'PICT' , theName ) ;
1378     if ( thePict )
1379     {
1380         wxMetafile mf ;
1381         mf.SetHMETAFILE((WXHMETAFILE) thePict ) ;
1382         bitmap->Create( mf.GetWidth() , mf.GetHeight() ) ;
1383         wxMemoryDC dc ;
1384         dc.SelectObject( *bitmap ) ;
1385         mf.Play( &dc ) ;
1386         dc.SelectObject( wxNullBitmap ) ;
1387         return TRUE ;
1388     }
1389 #endif //wxUSE_METAFILE
1390     return FALSE ;
1391 }
1392
1393
1394 void wxBitmap::InitStandardHandlers()
1395 {
1396     AddHandler(new wxPICTResourceHandler) ;
1397     AddHandler(new wxICONResourceHandler) ;
1398 }
1399
1400 // ----------------------------------------------------------------------------
1401 // raw bitmap access support
1402 // ----------------------------------------------------------------------------
1403
1404 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1405 {
1406     if ( !Ok() )
1407     {
1408         // no bitmap, no data (raw or otherwise)
1409         return NULL;
1410     }
1411
1412     data.m_width = GetWidth() ;
1413     data.m_height = GetHeight() ;
1414     data.m_stride = GetWidth() * 4 ;
1415     return GetRawAccess() ;
1416 }
1417
1418 void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
1419 {
1420     if ( !Ok() )
1421         return;
1422
1423     // TODO : if we have some information about the API we should check
1424     // this code looks strange...
1425
1426     if ( M_BITMAPDATA->HasAlpha() )
1427     {
1428         wxAlphaPixelData& data = (wxAlphaPixelData&)dataBase;
1429
1430         int w = data.GetWidth(),
1431             h = data.GetHeight();
1432
1433         wxBitmap bmpMask(GetWidth(), GetHeight(), 32);
1434         wxAlphaPixelData dataMask(bmpMask, data.GetOrigin(), wxSize(w, h));
1435         wxAlphaPixelData::Iterator pMask(dataMask),
1436                                    p(data);
1437         for ( int y = 0; y < h; y++ )
1438         {
1439             wxAlphaPixelData::Iterator rowStartMask = pMask,
1440                                        rowStart = p;
1441
1442             for ( int x = 0; x < w; x++ )
1443             {
1444                 const wxAlphaPixelData::Iterator::ChannelType
1445                     alpha = p.Alpha();
1446
1447                 pMask.Red() = alpha;
1448                 pMask.Green() = alpha;
1449                 pMask.Blue() = alpha;
1450
1451                 ++p;
1452                 ++pMask;
1453             }
1454
1455             p = rowStart;
1456             p.OffsetY(data, 1);
1457
1458             pMask = rowStartMask;
1459             pMask.OffsetY(dataMask, 1);
1460         }
1461
1462         SetMask(new wxMask(bmpMask));
1463     }
1464 }
1465
1466 void wxBitmap::UseAlpha()
1467 {
1468     // remember that we are using alpha channel, we'll need to create a proper
1469     // mask in UngetRawData()
1470     M_BITMAPDATA->UseAlpha( true );
1471 }