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 void wxMacCreateBitmapButton( ControlButtonContentInfo*info , const wxBitmap& bitmap , int forceType )
  55 {
  56     memset( info , 0 , sizeof(ControlButtonContentInfo) ) ;
  57     if ( bitmap.Ok() )
  58     {
  59         wxBitmapRefData * bmap = (wxBitmapRefData*) ( bitmap.GetRefData()) ;
  60         if ( bmap == NULL )
  61             return ;
  62
  63         if ( bmap->HasNativeSize() )
  64         {
  65             info->contentType = kControlContentIconRef ;
  66             info->u.iconRef = bmap->GetIconRef() ;
  67         }
  68         else
  69         {
  70             info->contentType = kControlContentPictHandle ;
  71             info->u.picture = bmap->GetPictHandle() ;
  72         }
  73 #if wxMAC_USE_CORE_GRAPHICS
  74         /*
  75             // only on 10.4 more controls will accept a CGImage
  76
  77             info->contentType = kControlContentCGImageRef ;
  78             info->u.imageRef = (CGImageRef) bmap->CGImageCreate() ;
  79         */
  80 #endif
  81     }
  82 }
  83
  84 void wxMacReleaseBitmapButton( ControlButtonContentInfo*info )
  85 {
  86     if ( info->contentType == kControlContentIconRef )
  87     {
  88         // as the bitmap is now the owner, no need to release here
  89     }
  90     else if ( info->contentType == kControlContentPictHandle )
  91     {
  92         // owned by the bitma, no release here
  93     }
  94 #if wxMAC_USE_CORE_GRAPHICS && MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2
  95     else if ( info->contentType == kControlContentCGImageRef )
  96     {
  97         CGImageRelease( info->u.imageRef ) ;
  98     }
  99 #endif
 100     else
 101     {
 102         wxFAIL_MSG(wxT("Unexpected bitmap type") ) ;
 103     }
 104 }
 105
 106 #define M_BITMAPDATA ((wxBitmapRefData *)m_refData)
 107
 108 void wxBitmapRefData::Init()
 109 {
 110     m_width = 0 ;
 111     m_height = 0 ;
 112     m_depth = 0 ;
 113     m_ok = false ;
 114     m_bitmapMask = NULL ;
 115 #if wxMAC_USE_CORE_GRAPHICS
 116     m_cgImageRef = NULL ;
 117 #endif
 118     m_iconRef = NULL ;
 119     m_pictHandle = NULL ;
 120     m_hBitmap = NULL ;
 121     m_hMaskBitmap = NULL;
 122     m_maskBytesPerRow = NULL ;
 123
 124     m_rawAccessCount = 0 ;
 125     m_hasAlpha = false;
 126 }
 127
 128 wxBitmapRefData::wxBitmapRefData()
 129 {
 130     Init() ;
 131 }
 132
 133 wxBitmapRefData::wxBitmapRefData( int w , int h , int d )
 134 {
 135     Init() ;
 136     Create( w , h , d ) ;
 137 }
 138
 139 bool wxBitmapRefData::Create( int w , int h , int d )
 140 {
 141     m_width = w ;
 142     m_height = h ;
 143     m_depth = d ;
 144
 145     m_bytesPerRow = w * 4 ;
 146     size_t size = m_bytesPerRow * h ;
 147     void*  data = m_memBuf.GetWriteBuf(size) ;
 148     memset( data ,  0 , size) ;
 149     m_memBuf.UngetWriteBuf(size) ;
 150
 151     m_hBitmap = NULL ;
 152     Rect rect = { 0 , 0 , m_height , m_width } ;
 153     verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_hBitmap , k32ARGBPixelFormat , &rect , NULL , NULL , 0 ,
 154         (char*) data , m_bytesPerRow ) ) ;
 155     wxASSERT_MSG( m_hBitmap , wxT("Unable to create GWorld context") ) ;
 156     m_ok = ( m_hBitmap != NULL ) ;
 157
 158     return m_ok ;
 159 }
 160
 161 void wxBitmapRefData::UseAlpha( bool use )
 162 {
 163     if ( m_hasAlpha == use )
 164         return ;
 165
 166     m_hasAlpha = use ;
 167     if ( m_hasAlpha )
 168     {
 169         int width = GetWidth() ;
 170         int height = GetHeight() ;
 171         m_maskBytesPerRow = ( width * 4 + 3 ) & 0xFFFFFFC ;
 172         size_t size = height * m_maskBytesPerRow ;
 173         unsigned char * data = (unsigned char * ) m_maskMemBuf.GetWriteBuf( size ) ;
 174         memset( data , 0 , size ) ;
 175         wxASSERT( m_hMaskBitmap == NULL ) ;
 176         Rect rect = { 0 , 0 , height , width } ;
 177         verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_hMaskBitmap , k32ARGBPixelFormat , &rect , NULL , NULL , 0 ,
 178             (char*) data , m_maskBytesPerRow ) ) ;
 179         wxASSERT_MSG( m_hMaskBitmap , wxT("Unable to create GWorld context for alpha mask") ) ;
 180         m_maskMemBuf.UngetWriteBuf(size) ;
 181 #if !wxMAC_USE_CORE_GRAPHICS
 182         UpdateAlphaMask() ;
 183 #endif
 184     }
 185     else
 186     {
 187         DisposeGWorld( m_hMaskBitmap ) ;
 188         m_hMaskBitmap = NULL ;
 189         m_maskBytesPerRow = 0 ;
 190     }
 191 }
 192
 193 void *wxBitmapRefData::GetRawAccess() const
 194 {
 195     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
 196     return m_memBuf.GetData() ;
 197 }
 198
 199 void *wxBitmapRefData::BeginRawAccess()
 200 {
 201     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") ) ;
 202     wxASSERT( m_rawAccessCount == 0 ) ;
 203     ++m_rawAccessCount ;
 204     // we must destroy an existing cached image, as
 205     // the bitmap data may change now
 206     wxASSERT_MSG( m_pictHandle == NULL && m_iconRef == NULL ,
 207         wxT("Currently, modifing bitmaps that are used in controls already is not supported") ) ;
 208 #if wxMAC_USE_CORE_GRAPHICS
 209     if ( m_cgImageRef )
 210     {
 211         CGImageRelease( m_cgImageRef ) ;
 212         m_cgImageRef = NULL ;
 213     }
 214 #endif
 215     return m_memBuf.GetData() ;
 216 }
 217
 218 void wxBitmapRefData::EndRawAccess()
 219 {
 220     wxCHECK_RET( Ok() , wxT("invalid bitmap") ) ;
 221     wxASSERT( m_rawAccessCount == 1 ) ;
 222     --m_rawAccessCount ;
 223 #if !wxMAC_USE_CORE_GRAPHICS
 224     UpdateAlphaMask() ;
 225 #endif
 226 }
 227
 228 bool wxBitmapRefData::HasNativeSize()
 229 {
 230     int w = GetWidth() ;
 231     int h = GetHeight() ;
 232     int sz = wxMax( w , h ) ;
 233
 234     if ( sz == 128 || sz == 48 || sz == 32 || sz == 16 )
 235         return true ;
 236     return false ;
 237 }
 238
 239 IconRef wxBitmapRefData::GetIconRef()
 240 {
 241     if ( m_iconRef == NULL )
 242     {
 243         // Create Icon Family Handle
 244
 245         IconFamilyHandle iconFamily = NULL ;
 246
 247         iconFamily = (IconFamilyHandle) NewHandle(8) ;
 248         (**iconFamily).resourceType = kIconFamilyType ;
 249         (**iconFamily).resourceSize = sizeof(OSType) + sizeof(Size);
 250
 251         int w = GetWidth() ;
 252         int h = GetHeight() ;
 253         int sz = wxMax( w , h ) ;
 254
 255         OSType dataType = 0 ;
 256         OSType maskType = 0 ;
 257
 258         if ( sz == 128 )
 259         {
 260             dataType = kThumbnail32BitData ;
 261             maskType = kThumbnail8BitMask ;
 262         }
 263         else if ( sz == 48 )
 264         {
 265             dataType = kHuge32BitData ;
 266             maskType = kHuge8BitMask ;
 267         }
 268         else if ( sz == 32 )
 269         {
 270             dataType = kLarge32BitData ;
 271             maskType = kLarge8BitMask ;
 272         }
 273         else if ( sz == 16 )
 274         {
 275             dataType = kSmall32BitData ;
 276             maskType = kSmall8BitMask ;
 277         }
 278
 279         if ( dataType != 0 )
 280         {
 281             // setup the header properly
 282
 283             Handle data = NULL ;
 284             Handle maskdata = NULL ;
 285             unsigned char * maskptr = NULL ;
 286             unsigned char * ptr = NULL ;
 287             size_t size ;
 288             size_t masksize ;
 289
 290             size = sz * sz * 4 ;
 291             data = NewHandle( size) ;
 292             HLock( data ) ;
 293             ptr = (unsigned char*) *data ;
 294             memset( ptr , 0, size ) ;
 295
 296             masksize = sz * sz ;
 297             maskdata = NewHandle( masksize ) ;
 298             HLock( maskdata ) ;
 299             maskptr = (unsigned char*) *maskdata ;
 300             memset( maskptr , 0 , masksize ) ;
 301
 302             bool hasAlpha = HasAlpha() ;
 303             wxMask *mask = m_bitmapMask ;
 304             unsigned char * source = (unsigned char*) GetRawAccess() ;
 305             unsigned char * masksource = mask ? (unsigned char*) mask->GetRawAccess() : NULL ;
 306             for ( int y = 0 ; y < h ; ++y )
 307             {
 308                 unsigned char * dest = ptr + y * sz * 4 ;
 309                 unsigned char * maskdest = maskptr + y * sz ;
 310                 for ( int x = 0 ; x < w ; ++x )
 311                 {
 312                     unsigned char a = *source ++ ;
 313                     unsigned char r = *source ++ ;
 314                     unsigned char g = *source ++ ;
 315                     unsigned char b = *source ++ ;
 316
 317                     *dest++ = 0 ;
 318                     *dest++ = r ;
 319                     *dest++ = g ;
 320                     *dest++ = b ;
 321
 322                     if ( mask )
 323                         *maskdest++ = *masksource++ ;
 324                     else if ( hasAlpha )
 325                         *maskdest++ = a ;
 326                     else
 327                         *maskdest++ = 0xFF ;
 328                 }
 329             }
 330
 331             OSStatus err = SetIconFamilyData( iconFamily, dataType , data ) ;
 332             wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 333
 334             err = SetIconFamilyData( iconFamily, maskType , maskdata ) ;
 335             wxASSERT_MSG( err == noErr , wxT("Error when adding mask") ) ;
 336             HUnlock( data ) ;
 337             HUnlock( maskdata ) ;
 338             DisposeHandle( data ) ;
 339             DisposeHandle( maskdata ) ;
 340         }
 341         else
 342         {
 343             iconFamily = (IconFamilyHandle) NewHandle(8) ;
 344             (**iconFamily).resourceType = kIconFamilyType ;
 345             (**iconFamily).resourceSize = sizeof(OSType) + sizeof(Size);
 346             PicHandle pic = GetPictHandle() ;
 347             SetIconFamilyData( iconFamily, 'PICT' , (Handle) pic ) ;
 348         }
 349
 350         // transform into IconRef
 351
 352         static int iconCounter = 2 ;
 353         OSStatus err = RegisterIconRefFromIconFamily( 'WXNG' , (OSType) iconCounter, iconFamily, &m_iconRef ) ;
 354         wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 355         // we have to retain a reference, as Unregister will decrement it
 356         AcquireIconRef( m_iconRef ) ;
 357         UnregisterIconRef( 'WXNG' , (OSType) iconCounter ) ;
 358         DisposeHandle( (Handle) iconFamily ) ;
 359         ++iconCounter ;
 360     }
 361     return m_iconRef ;
 362 }
 363
 364 PicHandle wxBitmapRefData::GetPictHandle()
 365 {
 366     if ( m_pictHandle == NULL )
 367     {
 368         CGrafPtr        origPort = NULL ;
 369         GDHandle        origDev = NULL ;
 370         GWorldPtr       wp = NULL ;
 371         GWorldPtr       mask = NULL ;
 372         int height = GetHeight() ;
 373         int width = GetWidth() ;
 374
 375         Rect rect = { 0 , 0 , height , width } ;
 376
 377         GetGWorld( &origPort , &origDev ) ;
 378
 379         wp = GetHBITMAP( &mask ) ;
 380
 381         RgnHandle clipRgn = NULL ;
 382
 383         if ( mask )
 384         {
 385             GWorldPtr monoworld ;
 386             clipRgn = NewRgn() ;
 387             OSStatus err = NewGWorld( &monoworld , 1 , &rect , NULL , NULL , 0 ) ;
 388             verify_noerr(err) ;
 389             LockPixels( GetGWorldPixMap( monoworld ) ) ;
 390             LockPixels( GetGWorldPixMap( mask ) ) ;
 391             SetGWorld( monoworld , NULL ) ;
 392             RGBColor       white = { 0xffff ,0xffff , 0xffff } ;
 393             RGBColor       black = { 0x0000 ,0x0000 , 0x0000 } ;
 394             RGBForeColor( &black ) ;
 395             RGBBackColor( &white ) ;
 396             CopyBits(GetPortBitMapForCopyBits(mask),
 397                     GetPortBitMapForCopyBits(monoworld),
 398                     &rect,
 399                     &rect,
 400                     srcCopy,NULL);
 401             BitMapToRegion( clipRgn , (BitMap*) *GetGWorldPixMap( monoworld ) ) ;
 402             UnlockPixels( GetGWorldPixMap( monoworld ) ) ;
 403             UnlockPixels( GetGWorldPixMap( mask ) ) ;
 404             DisposeGWorld( monoworld ) ;
 405         }
 406
 407         SetGWorld( wp , NULL ) ;
 408         Rect portRect ;
 409         GetPortBounds( wp , &portRect ) ;
 410         m_pictHandle = OpenPicture(&portRect);
 411
 412         if(m_pictHandle)
 413         {
 414             RGBColor       white = { 0xffff ,0xffff , 0xffff } ;
 415             RGBColor       black = { 0x0000 ,0x0000 , 0x0000 } ;
 416             RGBForeColor( &black ) ;
 417             RGBBackColor( &white ) ;
 418
 419             if ( clipRgn )
 420                 SetClip( clipRgn ) ;
 421
 422             LockPixels( GetGWorldPixMap( wp ) ) ;
 423             CopyBits(GetPortBitMapForCopyBits(wp),
 424                     GetPortBitMapForCopyBits(wp),
 425                     &portRect,
 426                     &portRect,
 427                     srcCopy,clipRgn);
 428             UnlockPixels( GetGWorldPixMap( wp ) ) ;
 429             ClosePicture();
 430         }
 431         SetGWorld( origPort , origDev ) ;
 432         if ( clipRgn )
 433             DisposeRgn( clipRgn ) ;
 434     }
 435     return m_pictHandle ;
 436 }
 437
 438 #if wxMAC_USE_CORE_GRAPHICS
 439 void wxMacMemoryBufferReleaseProc(void *info, const void *data, size_t size)
 440 {
 441     wxMemoryBuffer* membuf = (wxMemoryBuffer*) info ;
 442     wxASSERT( data == membuf->GetData() ) ;
 443     delete membuf ;
 444 }
 445
 446 CGImageRef wxBitmapRefData::CGImageCreate() const
 447 {
 448     wxASSERT( m_ok ) ;
 449     wxASSERT( m_rawAccessCount >= 0 ) ;
 450     CGImageRef image ;
 451     if ( m_rawAccessCount > 0 || m_cgImageRef == NULL )
 452     {
 453         size_t imageSize = m_width * m_height * 4 ;
 454         void * dataBuffer = m_memBuf.GetData() ;
 455         int w = m_width ;
 456         int h = m_height ;
 457         CGImageAlphaInfo alphaInfo = kCGImageAlphaNoneSkipFirst ;
 458         wxMemoryBuffer* membuf = NULL ;
 459
 460         if ( m_bitmapMask )
 461         {
 462             membuf = new wxMemoryBuffer( imageSize ) ;
 463             memcpy( membuf->GetData() , dataBuffer , imageSize ) ;
 464             unsigned char *sourcemaskstart = (unsigned char *) m_bitmapMask->GetRawAccess() ;
 465             int maskrowbytes = m_bitmapMask->GetBytesPerRow() ;
 466             unsigned char *destalpha = (unsigned char *) membuf->GetData() ;
 467             alphaInfo = kCGImageAlphaFirst ;
 468             for ( int y = 0 ; y < h ; ++y , sourcemaskstart += maskrowbytes)
 469             {
 470                 unsigned char *sourcemask = sourcemaskstart ;
 471                 for( int x = 0 ; x < w ; ++x , sourcemask++ , destalpha += 4 )
 472                 {
 473                     *destalpha = *sourcemask ;
 474                 }
 475             }
 476         }
 477         else if ( m_hasAlpha )
 478         {
 479 #if wxMAC_USE_PREMULTIPLIED_ALPHA
 480             alphaInfo = kCGImageAlphaPremultipliedFirst ;
 481 #else
 482             alphaInfo = kCGImageAlphaFirst ;
 483 #endif
 484             membuf = new wxMemoryBuffer( m_memBuf ) ;
 485         }
 486         else
 487         {
 488             membuf = new wxMemoryBuffer( m_memBuf ) ;
 489         }
 490         CGColorSpaceRef colorSpace = wxMacGetGenericRGBColorSpace();
 491         CGDataProviderRef dataProvider =
 492             CGDataProviderCreateWithData( membuf , (const void *)membuf->GetData() , imageSize,
 493                 wxMacMemoryBufferReleaseProc );
 494         image =
 495             ::CGImageCreate( w, h, 8 , 32 , 4 * m_width , colorSpace, alphaInfo ,
 496                         dataProvider, NULL , false , kCGRenderingIntentDefault );
 497         CGDataProviderRelease( dataProvider);
 498     }
 499     else
 500     {
 501         image = m_cgImageRef ;
 502         CGImageRetain( image ) ;
 503     }
 504     if ( m_rawAccessCount == 0 && m_cgImageRef == NULL)
 505     {
 506         // we keep it for later use
 507         m_cgImageRef = image ;
 508         CGImageRetain( image ) ;
 509     }
 510     return image ;
 511 }
 512 #endif
 513
 514 GWorldPtr wxBitmapRefData::GetHBITMAP(GWorldPtr* mask) const
 515 {
 516     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 517     if ( mask )
 518     {
 519         *mask = NULL ;
 520         if ( m_bitmapMask )
 521             *mask = (GWorldPtr) m_bitmapMask->GetHBITMAP() ;
 522         else if ( m_hasAlpha )
 523         {
 524 #if !wxMAC_USE_CORE_GRAPHICS
 525             if ( m_rawAccessCount > 0 )
 526                 UpdateAlphaMask() ;
 527 #else
 528             // this structure is not kept in synch when using CG, so if someone
 529             // is really accessing the Graphports, we have to sync it
 530             UpdateAlphaMask() ;
 531 #endif
 532             *mask = m_hMaskBitmap ;
 533         }
 534     }
 535     return m_hBitmap ;
 536 }
 537
 538 void wxBitmapRefData::UpdateAlphaMask() const
 539 {
 540     if ( m_hasAlpha )
 541     {
 542         unsigned char *sourcemask = (unsigned char *) GetRawAccess() ;
 543         unsigned char *destalphabase = (unsigned char *) m_maskMemBuf.GetData() ;
 544
 545         int h = GetHeight() ;
 546         int w = GetWidth() ;
 547
 548         for ( int y = 0 ; y < h ; ++y , destalphabase += m_maskBytesPerRow )
 549         {
 550             unsigned char* destalpha = destalphabase ;
 551             for( int x = 0 ; x < w ; ++x , sourcemask += 4 )
 552             {
 553                 // we must have 24 bit depth for non quartz smooth alpha
 554                 *destalpha++ = 255 ;
 555                 *destalpha++ = 255  - *sourcemask ;
 556                 *destalpha++ = 255  - *sourcemask ;
 557                 *destalpha++ = 255  - *sourcemask ;
 558             }
 559         }
 560     }
 561 }
 562
 563 void wxBitmapRefData::Free()
 564 {
 565     wxASSERT_MSG( m_rawAccessCount == 0 , wxT("Bitmap still selected when destroyed") ) ;
 566
 567 #if wxMAC_USE_CORE_GRAPHICS
 568     if ( m_cgImageRef )
 569     {
 570         CGImageRelease( m_cgImageRef ) ;
 571         m_cgImageRef = NULL ;
 572     }
 573 #endif
 574     if ( m_iconRef )
 575     {
 576         ReleaseIconRef( m_iconRef ) ;
 577         m_iconRef = NULL ;
 578     }
 579     if ( m_pictHandle )
 580     {
 581         KillPicture( m_pictHandle ) ;
 582         m_pictHandle = NULL ;
 583     }
 584     if ( m_hBitmap )
 585     {
 586         DisposeGWorld( MAC_WXHBITMAP(m_hBitmap) ) ;
 587         m_hBitmap = NULL ;
 588     }
 589     if ( m_hMaskBitmap )
 590     {
 591         DisposeGWorld( MAC_WXHBITMAP(m_hMaskBitmap) ) ;
 592         m_hMaskBitmap = NULL ;
 593     }
 594
 595     if (m_bitmapMask)
 596     {
 597         delete m_bitmapMask;
 598         m_bitmapMask = NULL;
 599     }
 600 }
 601
 602 wxBitmapRefData::~wxBitmapRefData()
 603 {
 604     Free() ;
 605 }
 606
 607 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 608 {
 609     int w = icon.GetWidth() ;
 610     int h = icon.GetHeight() ;
 611
 612
 613     Create( icon.GetWidth() , icon.GetHeight() ) ;
 614
 615     bool created = false ;
 616
 617     if ( w == h && ( w == 16 || w == 32 || w == 48 || w == 128 ) )
 618     {
 619         IconFamilyHandle iconFamily = NULL ;
 620         Handle imagehandle = NewHandle(0) ;
 621         Handle maskhandle = NewHandle(0) ;
 622
 623         OSType maskType = 0;
 624         OSType dataType = 0;
 625         IconSelectorValue selector = 0 ;
 626         if ( w == 128 )
 627         {
 628             dataType = kThumbnail32BitData ;
 629             maskType = kThumbnail8BitMask ;
 630             selector = kSelectorAllAvailableData ;
 631         }
 632         else if ( w == 48 )
 633         {
 634             dataType = kHuge32BitData ;
 635             maskType = kHuge8BitMask ;
 636             selector = kSelectorHuge32Bit | kSelectorHuge8BitMask ;
 637         }
 638         else if ( w == 32 )
 639         {
 640             dataType = kLarge32BitData ;
 641             maskType = kLarge8BitMask ;
 642             selector = kSelectorLarge32Bit | kSelectorLarge8BitMask ;
 643         }
 644         else if ( w == 16 )
 645         {
 646             dataType = kSmall32BitData ;
 647             maskType = kSmall8BitMask ;
 648             selector = kSelectorSmall32Bit | kSelectorSmall8BitMask ;
 649         }
 650
 651
 652         OSStatus err = ( IconRefToIconFamily( MAC_WXHICON(icon.GetHICON()) , selector , &iconFamily ) ) ;
 653
 654         err =( GetIconFamilyData( iconFamily , dataType , imagehandle ) ) ;
 655         err =( GetIconFamilyData( iconFamily , maskType , maskhandle ) ) ;
 656         size_t imagehandlesize = GetHandleSize( imagehandle ) ;
 657         size_t maskhandlesize = GetHandleSize( maskhandle ) ;
 658
 659         if ( imagehandlesize != 0 && maskhandlesize != 0 )
 660         {
 661             wxASSERT( GetHandleSize( imagehandle ) == w * 4 * h ) ;
 662             wxASSERT( GetHandleSize( maskhandle ) == w * h ) ;
 663             UseAlpha() ;
 664             unsigned char *source = (unsigned char *) *imagehandle ;
 665             unsigned char *sourcemask = (unsigned char *) *maskhandle ;
 666
 667             unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 668             for ( int y = 0 ; y < h ; ++y )
 669             {
 670                 for ( int x = 0 ; x < w ; ++x )
 671                 {
 672                     *destination++ = *sourcemask++ ;
 673                     source++ ;
 674                     *destination++ = *source++ ;
 675                     *destination++ = *source++ ;
 676                     *destination++ = *source++ ;
 677                 }
 678             }
 679             EndRawAccess() ;
 680             DisposeHandle( imagehandle ) ;
 681             DisposeHandle( maskhandle ) ;
 682         }
 683         DisposeHandle( (Handle) iconFamily ) ;
 684
 685     }
 686
 687     if ( !created )
 688     {
 689         wxMemoryDC dc ;
 690         dc.SelectObject( *this ) ;
 691         dc.DrawIcon( icon , 0 , 0 ) ;
 692         dc.SelectObject( wxNullBitmap ) ;
 693     }
 694     return true;
 695 }
 696
 697 wxBitmap::wxBitmap()
 698 {
 699 }
 700
 701 wxBitmap::~wxBitmap()
 702 {
 703 }
 704
 705 wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
 706 {
 707     m_refData = new wxBitmapRefData( the_width , the_height , no_bits ) ;
 708
 709     if ( no_bits == 1 )
 710     {
 711         int linesize = ( the_width / (sizeof(unsigned char) * 8)) ;
 712         if ( the_width % (sizeof(unsigned char) * 8) ) {
 713             linesize += sizeof(unsigned char);
 714         }
 715         unsigned char* linestart = (unsigned char*) bits ;
 716         unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 717         for ( int y = 0 ; y < the_height ; ++y , linestart += linesize )
 718         {
 719             for ( int x = 0 ; x < the_width ; ++x )
 720             {
 721                 int index = x / 8 ;
 722                 int bit = x % 8 ;
 723                 int mask = 1 << bit ;
 724                 if ( linestart[index] & mask )
 725                 {
 726                     *destination++ = 0xFF ;
 727                     *destination++ = 0 ;
 728                     *destination++ = 0 ;
 729                     *destination++ = 0 ;
 730                 }
 731                 else
 732                 {
 733                     *destination++ = 0xFF ;
 734                     *destination++ = 0xFF ;
 735                     *destination++ = 0xFF ;
 736                     *destination++ = 0xFF ;
 737                 }
 738             }
 739         }
 740         EndRawAccess() ;
 741     }
 742     else
 743     {
 744         wxFAIL_MSG(wxT("multicolor BITMAPs not yet implemented"));
 745     }
 746 }
 747
 748 wxBitmap::wxBitmap(int w, int h, int d)
 749 {
 750     (void)Create(w, h, d);
 751 }
 752
 753 wxBitmap::wxBitmap(void *data, wxBitmapType type, int width, int height, int depth)
 754 {
 755     (void) Create(data, type, width, height, depth);
 756 }
 757
 758 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
 759 {
 760     LoadFile(filename, type);
 761 }
 762
 763 wxBitmap::wxBitmap(const char **bits)
 764 {
 765     (void) CreateFromXpm(bits);
 766 }
 767
 768 wxBitmap::wxBitmap(char **bits)
 769 {
 770     (void) CreateFromXpm((const char **)bits);
 771 }
 772
 773 void* wxBitmap::GetRawAccess() const
 774 {
 775     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 776     return M_BITMAPDATA->GetRawAccess() ;
 777 }
 778
 779 void* wxBitmap::BeginRawAccess()
 780 {
 781     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 782     return M_BITMAPDATA->BeginRawAccess() ;
 783 }
 784
 785 void wxBitmap::EndRawAccess()
 786 {
 787     wxCHECK_RET( Ok() , wxT("invalid bitmap") ) ;
 788     M_BITMAPDATA->EndRawAccess() ;
 789 }
 790
 791 bool wxBitmap::CreateFromXpm(const char **bits)
 792 {
 793     wxCHECK_MSG( bits != NULL, FALSE, wxT("invalid bitmap data") )
 794     wxXPMDecoder decoder;
 795     wxImage img = decoder.ReadData(bits);
 796     wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") )
 797     *this = wxBitmap(img);
 798     return TRUE;
 799 }
 800
 801 #if wxMAC_USE_CORE_GRAPHICS
 802 WXCGIMAGEREF wxBitmap::CGImageCreate() const
 803 {
 804     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
 805     return M_BITMAPDATA->CGImageCreate() ;
 806 }
 807 #endif
 808
 809 wxBitmap wxBitmap::GetSubBitmap(const wxRect &rect) const
 810 {
 811     wxCHECK_MSG( Ok() &&
 812                 (rect.x >= 0) && (rect.y >= 0) &&
 813                 (rect.x+rect.width <= GetWidth()) &&
 814                 (rect.y+rect.height <= GetHeight()),
 815                 wxNullBitmap, wxT("invalid bitmap or bitmap region") );
 816
 817
 818     wxBitmap ret( rect.width, rect.height, GetDepth() );
 819     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 820
 821
 822     int sourcewidth = GetWidth() ;
 823     int destwidth = rect.width ;
 824     int destheight = rect.height ;
 825     {
 826         unsigned char * sourcedata = (unsigned char*) GetRawAccess() ;
 827         unsigned char * destdata = (unsigned char*) ret.BeginRawAccess() ;
 828         int sourcelinesize = sourcewidth * 4 ;
 829         int destlinesize = destwidth * 4 ;
 830         unsigned char *source = sourcedata + rect.x * 4 + rect.y * sourcelinesize ;
 831         unsigned char *dest = destdata ;
 832         for(int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
 833         {
 834             memcpy( dest , source , destlinesize ) ;
 835         }
 836     }
 837     ret.EndRawAccess() ;
 838
 839     if ( M_BITMAPDATA->m_bitmapMask )
 840     {
 841         wxMemoryBuffer maskbuf ;
 842         int rowBytes = ( destwidth + 3 ) & 0xFFFFFFC ;
 843         size_t maskbufsize = rowBytes * destheight ;
 844         unsigned char * destdata = (unsigned char * ) maskbuf.GetWriteBuf( maskbufsize ) ;
 845
 846         int sourcelinesize = M_BITMAPDATA->m_bitmapMask->GetBytesPerRow()  ;
 847         int destlinesize = rowBytes ;
 848         unsigned char *source = (unsigned char *) M_BITMAPDATA->m_bitmapMask->GetRawAccess() ;
 849         source += rect.x + rect.y * sourcelinesize ;
 850         unsigned char *dest = destdata ;
 851
 852         for(int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
 853         {
 854             memcpy( dest , source , destlinesize ) ;
 855         }
 856         maskbuf.UngetWriteBuf( maskbufsize ) ;
 857         ret.SetMask( new wxMask( maskbuf , destwidth , destheight , rowBytes ) ) ;
 858     }
 859     else if ( HasAlpha() )
 860         ret.UseAlpha() ;
 861
 862     return ret;
 863 }
 864
 865 bool wxBitmap::Create(int w, int h, int d)
 866 {
 867     UnRef();
 868
 869     if ( d < 0 )
 870         d = wxDisplayDepth() ;
 871
 872     m_refData = new wxBitmapRefData( w , h , d );
 873
 874     return M_BITMAPDATA->Ok() ;
 875 }
 876
 877 bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
 878 {
 879     UnRef();
 880
 881     wxBitmapHandler *handler = FindHandler(type);
 882
 883     if ( handler )
 884     {
 885         m_refData = new wxBitmapRefData;
 886
 887         return handler->LoadFile(this, filename, type, -1, -1);
 888     }
 889     else
 890     {
 891         wxImage loadimage(filename, type);
 892         if (loadimage.Ok()) {
 893             *this = loadimage;
 894             return true;
 895         }
 896     }
 897     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
 898     return false;
 899 }
 900
 901 bool wxBitmap::Create(void *data, wxBitmapType type, int width, int height, int depth)
 902 {
 903     UnRef();
 904
 905     m_refData = new wxBitmapRefData;
 906
 907     wxBitmapHandler *handler = FindHandler(type);
 908
 909     if ( handler == NULL ) {
 910         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
 911
 912         return FALSE;
 913     }
 914
 915     return handler->Create(this, data, type, width, height, depth);
 916 }
 917
 918 wxBitmap::wxBitmap(const wxImage& image, int depth)
 919 {
 920     wxCHECK_RET( image.Ok(), wxT("invalid image") )
 921
 922     // width and height of the device-dependent bitmap
 923     int width = image.GetWidth();
 924     int height = image.GetHeight();
 925
 926     m_refData = new wxBitmapRefData( width , height , depth ) ;;
 927
 928     // Create picture
 929
 930     bool hasAlpha = false ;
 931
 932     if ( image.HasMask() )
 933     {
 934         // takes precedence, don't mix with alpha info
 935     }
 936     else
 937     {
 938         hasAlpha = image.HasAlpha() ;
 939     }
 940
 941     if ( hasAlpha )
 942         UseAlpha() ;
 943
 944     unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 945
 946     register unsigned char* data = image.GetData();
 947     const unsigned char *alpha = hasAlpha ? image.GetAlpha() : NULL ;
 948     for (int y = 0; y < height; y++)
 949     {
 950         for (int x = 0; x < width; x++)
 951         {
 952             if ( hasAlpha )
 953             {
 954                 const unsigned char a = *alpha++;
 955                 *destination++ = a ;
 956 #if wxMAC_USE_PREMULTIPLIED_ALPHA
 957                 *destination++ = ((*data++) * a + 127 ) / 255 ;
 958                 *destination++ = ((*data++) * a + 127 ) / 255 ;
 959                 *destination++ = ((*data++) * a + 127 ) / 255 ;
 960 #else
 961                 *destination++ = *data++ ;
 962                 *destination++ = *data++ ;
 963                 *destination++ = *data++ ;
 964 #endif
 965             }
 966             else
 967             {
 968                 *destination++ = 0xFF ;
 969                 *destination++ = *data++ ;
 970                 *destination++ = *data++ ;
 971                 *destination++ = *data++ ;
 972             }
 973         }
 974     }
 975     EndRawAccess() ;
 976     if ( image.HasMask() )
 977     {
 978         SetMask( new wxMask( *this , wxColour( image.GetMaskRed() , image.GetMaskGreen() , image.GetMaskBlue() ) ) ) ;
 979     }
 980 }
 981
 982 wxImage wxBitmap::ConvertToImage() const
 983 {
 984     wxImage image;
 985
 986     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 987
 988     // create an wxImage object
 989     int width = GetWidth();
 990     int height = GetHeight();
 991     image.Create( width, height );
 992
 993     unsigned char *data = image.GetData();
 994     wxCHECK_MSG( data, wxNullImage, wxT("Could not allocate data for image") );
 995
 996     unsigned char* source = (unsigned char*) GetRawAccess() ;
 997
 998     bool hasAlpha = false ;
 999     bool hasMask = false ;
1000     unsigned char *alpha = NULL ;
1001     unsigned char *mask = NULL ;
1002     if ( HasAlpha() )
1003     {
1004         hasAlpha = true ;
1005     }
1006
1007     if ( GetMask() )
1008     {
1009         hasMask = true ;
1010         mask = (unsigned char*) GetMask()->GetRawAccess() ;
1011     }
1012
1013     if ( hasAlpha )
1014     {
1015         image.SetAlpha() ;
1016         alpha = image.GetAlpha() ;
1017     }
1018     int index = 0;
1019
1020     // The following masking algorithm is the same as well in msw/gtk:
1021     // the colour used as transparent one in wxImage and the one it is
1022     // replaced with when it really occurs in the bitmap
1023     static const int MASK_RED = 1;
1024     static const int MASK_GREEN = 2;
1025     static const int MASK_BLUE = 3;
1026     static const int MASK_BLUE_REPLACEMENT = 2;
1027
1028     for (int yy = 0; yy < height; yy++)
1029     {
1030         for (int xx = 0; xx < width; xx++)
1031         {
1032             long color = *((long*) source) ;
1033             unsigned char a = ((color&0xFF000000) >> 24) ;
1034             unsigned char r = ((color&0x00FF0000) >> 16) ;
1035             unsigned char g = ((color&0x0000FF00) >> 8) ;
1036             unsigned char b = (color&0x000000FF);
1037             if ( hasMask )
1038             {
1039                 if ( *mask++ == 0 )
1040                 {
1041                     if ( r == MASK_RED && g == MASK_GREEN && b == MASK_BLUE )
1042                         b = MASK_BLUE_REPLACEMENT ;
1043                     else
1044                     {
1045                         r = MASK_RED ;
1046                         g = MASK_GREEN ;
1047                         b = MASK_BLUE ;
1048                     }
1049                 }
1050             }
1051             else if ( hasAlpha )
1052                 *alpha++ = a ;
1053
1054             data[index    ] = r ;
1055             data[index + 1] = g ;
1056             data[index + 2] = b ;
1057             index += 3;
1058             source += 4 ;
1059         }
1060     }
1061     if ( hasMask )
1062         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1063     return image;
1064 }
1065
1066
1067 bool wxBitmap::SaveFile(const wxString& filename, wxBitmapType type,
1068                         const wxPalette *palette) const
1069 {
1070     wxBitmapHandler *handler = FindHandler(type);
1071
1072     if ( handler )
1073     {
1074         return handler->SaveFile(this, filename, type, palette);
1075     }
1076     else
1077     {
1078         wxImage image = ConvertToImage();
1079
1080         return image.SaveFile(filename, type);
1081     }
1082
1083     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1084     return false;
1085 }
1086
1087 bool wxBitmap::Ok() const
1088 {
1089    return (M_BITMAPDATA && M_BITMAPDATA->Ok());
1090 }
1091
1092 int wxBitmap::GetHeight() const
1093 {
1094    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1095
1096    return M_BITMAPDATA->GetHeight();
1097 }
1098
1099 int wxBitmap::GetWidth() const
1100 {
1101    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1102
1103    return M_BITMAPDATA->GetWidth() ;
1104 }
1105
1106 int wxBitmap::GetDepth() const
1107 {
1108    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1109
1110    return M_BITMAPDATA->GetDepth();
1111 }
1112
1113 #if WXWIN_COMPATIBILITY_2_4
1114
1115 int wxBitmap::GetQuality() const
1116 {
1117     return 0;
1118 }
1119
1120 #endif
1121
1122 wxMask *wxBitmap::GetMask() const
1123 {
1124    wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1125
1126    return M_BITMAPDATA->m_bitmapMask;
1127 }
1128
1129 bool wxBitmap::HasAlpha() const
1130 {
1131    wxCHECK_MSG( Ok(), false , wxT("invalid bitmap") );
1132
1133    return M_BITMAPDATA->HasAlpha() ;
1134 }
1135
1136 void wxBitmap::SetWidth(int w)
1137 {
1138     if (!M_BITMAPDATA)
1139         m_refData = new wxBitmapRefData;
1140
1141     M_BITMAPDATA->SetWidth(w);
1142 }
1143
1144 void wxBitmap::SetHeight(int h)
1145 {
1146     if (!M_BITMAPDATA)
1147         m_refData = new wxBitmapRefData;
1148
1149     M_BITMAPDATA->SetHeight(h);
1150 }
1151
1152 void wxBitmap::SetDepth(int d)
1153 {
1154     if (!M_BITMAPDATA)
1155         m_refData = new wxBitmapRefData;
1156
1157     M_BITMAPDATA->SetDepth(d);
1158 }
1159
1160 #if WXWIN_COMPATIBILITY_2_4
1161
1162 void wxBitmap::SetQuality(int WXUNUSED(quality))
1163 {
1164 }
1165
1166 #endif
1167
1168 void wxBitmap::SetOk(bool isOk)
1169 {
1170     if (!M_BITMAPDATA)
1171         m_refData = new wxBitmapRefData;
1172
1173     M_BITMAPDATA->SetOk(isOk);
1174 }
1175
1176 #if wxUSE_PALETTE
1177 wxPalette *wxBitmap::GetPalette() const
1178 {
1179    wxCHECK_MSG( Ok(), NULL, wxT("Invalid bitmap  GetPalette()") );
1180
1181    return &M_BITMAPDATA->m_bitmapPalette;
1182 }
1183
1184 void wxBitmap::SetPalette(const wxPalette& palette)
1185 {
1186     if (!M_BITMAPDATA)
1187         m_refData = new wxBitmapRefData;
1188
1189     M_BITMAPDATA->m_bitmapPalette = palette ;
1190 }
1191 #endif // wxUSE_PALETTE
1192
1193 void wxBitmap::SetMask(wxMask *mask)
1194 {
1195     if (!M_BITMAPDATA)
1196         m_refData = new wxBitmapRefData;
1197
1198     // Remove existing mask if there is one.
1199     delete M_BITMAPDATA->m_bitmapMask;
1200
1201     M_BITMAPDATA->m_bitmapMask = mask ;
1202 }
1203
1204 WXHBITMAP wxBitmap::GetHBITMAP(WXHBITMAP* mask) const
1205 {
1206     return WXHBITMAP(M_BITMAPDATA->GetHBITMAP((GWorldPtr*)mask));
1207 }
1208
1209 // ----------------------------------------------------------------------------
1210 // wxMask
1211 // ----------------------------------------------------------------------------
1212
1213 wxMask::wxMask()
1214 {
1215     Init() ;
1216 }
1217
1218 // Construct a mask from a bitmap and a colour indicating
1219 // the transparent area
1220 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
1221 {
1222     Init() ;
1223     Create(bitmap, colour);
1224 }
1225
1226 // Construct a mask from a mono bitmap (copies the bitmap).
1227 wxMask::wxMask(const wxBitmap& bitmap)
1228 {
1229     Init() ;
1230     Create(bitmap);
1231 }
1232
1233 // Construct a mask from a mono bitmap (copies the bitmap).
1234 wxMask::wxMask(const wxMemoryBuffer& data, int width , int height , int bytesPerRow )
1235 {
1236     Init() ;
1237     Create(data, width , height , bytesPerRow );
1238 }
1239
1240 wxMask::~wxMask()
1241 {
1242     if ( m_maskBitmap )
1243     {
1244         DisposeGWorld( (GWorldPtr) m_maskBitmap ) ;
1245         m_maskBitmap = NULL ;
1246     }
1247 }
1248
1249 void wxMask::Init()
1250 {
1251     m_width = m_height = m_bytesPerRow = 0 ;
1252     m_maskBitmap = NULL ;
1253 }
1254
1255 void *wxMask::GetRawAccess() const
1256 {
1257     return m_memBuf.GetData() ;
1258 }
1259
1260 // this can be a k8IndexedGrayPixelFormat GWorld, because it never stores other values than black or white
1261 // so no rainbox colors will be created by QD when blitting
1262
1263 void wxMask::RealizeNative()
1264 {
1265     if ( m_maskBitmap )
1266     {
1267        DisposeGWorld(  (GWorldPtr) m_maskBitmap ) ;
1268        m_maskBitmap = NULL ;
1269     }
1270     Rect rect = { 0 , 0 , m_height , m_width } ;
1271     verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_maskBitmap , k8IndexedGrayPixelFormat , &rect , NULL , NULL , 0 ,
1272         (char*) m_memBuf.GetData() , m_bytesPerRow ) ) ;
1273 }
1274
1275 // Create a mask from a mono bitmap (copies the bitmap).
1276 bool wxMask::Create(const wxMemoryBuffer& data,int width , int height , int bytesPerRow)
1277 {
1278     m_memBuf = data ;
1279     m_width = width ;
1280     m_height = height ;
1281     m_bytesPerRow = bytesPerRow ;
1282     wxASSERT( data.GetDataLen() == (size_t)(height * bytesPerRow) ) ;
1283     RealizeNative() ;
1284     return true ;
1285 }
1286
1287 // Create a mask from a mono bitmap (copies the bitmap).
1288 bool wxMask::Create(const wxBitmap& bitmap)
1289 {
1290     m_width = bitmap.GetWidth() ;
1291     m_height = bitmap.GetHeight() ;
1292     m_bytesPerRow = ( m_width + 3 ) & 0xFFFFFFC ;
1293     size_t size = m_bytesPerRow * m_height ;
1294     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1295     memset( destdatabase , 0 , size ) ;
1296     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1297     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow )
1298     {
1299         unsigned char *destdata= destdatabase ;
1300         for( int x = 0 ; x < m_width ; ++x )
1301         {
1302             srcdata++ ;
1303             unsigned char r = *srcdata++ ;
1304             unsigned char g = *srcdata++ ;
1305             unsigned char b = *srcdata++ ;
1306             if ( ( r + g + b ) > 0x10 )
1307                 *destdata++ = 0x00 ;
1308             else
1309                 *destdata++ = 0xFF ;
1310         }
1311     }
1312     m_memBuf.UngetWriteBuf( size ) ;
1313     RealizeNative() ;
1314     return TRUE;
1315 }
1316
1317 // Create a mask from a bitmap and a colour indicating
1318 // the transparent area
1319 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1320 {
1321     m_width = bitmap.GetWidth() ;
1322     m_height = bitmap.GetHeight() ;
1323     m_bytesPerRow = ( m_width + 3 ) & 0xFFFFFFC ;
1324     size_t size = m_bytesPerRow * m_height ;
1325
1326     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1327     memset( destdatabase , 0 , size ) ;
1328     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1329     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow)
1330     {
1331         unsigned char *destdata= destdatabase ;
1332         for( int x = 0 ; x < m_width ; ++x )
1333         {
1334             srcdata++ ;
1335             unsigned char r = *srcdata++ ;
1336             unsigned char g = *srcdata++ ;
1337             unsigned char b = *srcdata++ ;
1338             if ( colour == wxColour( r , g , b) )
1339                 *destdata++ = 0x00 ;
1340             else
1341                 *destdata++ = 0xFF ;
1342         }
1343     }
1344     m_memBuf.UngetWriteBuf( size ) ;
1345     RealizeNative() ;
1346     return TRUE;
1347 }
1348
1349 WXHBITMAP wxMask::GetHBITMAP() const
1350 {
1351     return m_maskBitmap ;
1352 }
1353
1354 // ----------------------------------------------------------------------------
1355 // wxBitmapHandler
1356 // ----------------------------------------------------------------------------
1357
1358 wxBitmapHandler::~wxBitmapHandler()
1359 {
1360 }
1361
1362 bool wxBitmapHandler::Create(wxBitmap *bitmap, void *data, long type, int width, int height, int depth)
1363 {
1364     return FALSE;
1365 }
1366
1367 bool wxBitmapHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1368         int desiredWidth, int desiredHeight)
1369 {
1370     return FALSE;
1371 }
1372
1373 bool wxBitmapHandler::SaveFile(const wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette)
1374 {
1375     return FALSE;
1376 }
1377
1378 // ----------------------------------------------------------------------------
1379 // Standard Handlers
1380 // ----------------------------------------------------------------------------
1381
1382 class WXDLLEXPORT wxPICTResourceHandler: public wxBitmapHandler
1383 {
1384     DECLARE_DYNAMIC_CLASS(wxPICTResourceHandler)
1385 public:
1386     inline wxPICTResourceHandler()
1387     {
1388         SetName(wxT("Macintosh Pict resource"));
1389         SetExtension(wxEmptyString);
1390         SetType(wxBITMAP_TYPE_PICT_RESOURCE);
1391     };
1392
1393     virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1394           int desiredWidth, int desiredHeight);
1395 };
1396 IMPLEMENT_DYNAMIC_CLASS(wxPICTResourceHandler, wxBitmapHandler)
1397
1398
1399 bool  wxPICTResourceHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1400           int desiredWidth, int desiredHeight)
1401 {
1402 #if wxUSE_METAFILE
1403     Str255 theName ;
1404     wxMacStringToPascal( name , theName ) ;
1405
1406     PicHandle thePict = (PicHandle ) GetNamedResource( 'PICT' , theName ) ;
1407     if ( thePict )
1408     {
1409         wxMetafile mf ;
1410         mf.SetHMETAFILE((WXHMETAFILE) thePict ) ;
1411         bitmap->Create( mf.GetWidth() , mf.GetHeight() ) ;
1412         wxMemoryDC dc ;
1413         dc.SelectObject( *bitmap ) ;
1414         mf.Play( &dc ) ;
1415         dc.SelectObject( wxNullBitmap ) ;
1416         return TRUE ;
1417     }
1418 #endif //wxUSE_METAFILE
1419     return FALSE ;
1420 }
1421
1422
1423 void wxBitmap::InitStandardHandlers()
1424 {
1425     AddHandler(new wxPICTResourceHandler) ;
1426     AddHandler(new wxICONResourceHandler) ;
1427 }
1428
1429 // ----------------------------------------------------------------------------
1430 // raw bitmap access support
1431 // ----------------------------------------------------------------------------
1432
1433 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1434 {
1435     if ( !Ok() )
1436     {
1437         // no bitmap, no data (raw or otherwise)
1438         return NULL;
1439     }
1440
1441     data.m_width = GetWidth() ;
1442     data.m_height = GetHeight() ;
1443     data.m_stride = GetWidth() * 4 ;
1444     return GetRawAccess() ;
1445 }
1446
1447 void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
1448 {
1449     if ( !Ok() )
1450         return;
1451
1452     // TODO : if we have some information about the API we should check
1453     // this code looks strange...
1454
1455     if ( M_BITMAPDATA->HasAlpha() )
1456     {
1457         wxAlphaPixelData& data = (wxAlphaPixelData&)dataBase;
1458
1459         int w = data.GetWidth(),
1460             h = data.GetHeight();
1461
1462         wxBitmap bmpMask(GetWidth(), GetHeight(), 32);
1463         wxAlphaPixelData dataMask(bmpMask, data.GetOrigin(), wxSize(w, h));
1464         wxAlphaPixelData::Iterator pMask(dataMask),
1465                                    p(data);
1466         for ( int y = 0; y < h; y++ )
1467         {
1468             wxAlphaPixelData::Iterator rowStartMask = pMask,
1469                                        rowStart = p;
1470
1471             for ( int x = 0; x < w; x++ )
1472             {
1473                 const wxAlphaPixelData::Iterator::ChannelType
1474                     alpha = p.Alpha();
1475
1476                 pMask.Red() = alpha;
1477                 pMask.Green() = alpha;
1478                 pMask.Blue() = alpha;
1479
1480                 ++p;
1481                 ++pMask;
1482             }
1483
1484             p = rowStart;
1485             p.OffsetY(data, 1);
1486
1487             pMask = rowStartMask;
1488             pMask.OffsetY(dataMask, 1);
1489         }
1490
1491         SetMask(new wxMask(bmpMask));
1492     }
1493 }
1494
1495 void wxBitmap::UseAlpha()
1496 {
1497     // remember that we are using alpha channel, we'll need to create a proper
1498     // mask in UngetRawData()
1499     M_BITMAPDATA->UseAlpha( true );
1500 }