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