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