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