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 #if wxUSE_BMPBUTTON
  55
  56 void wxMacCreateBitmapButton( ControlButtonContentInfo*info , const wxBitmap& bitmap , int forceType )
  57 {
  58     memset( info , 0 , sizeof(ControlButtonContentInfo) ) ;
  59     if ( bitmap.Ok() )
  60     {
  61         wxBitmapRefData * bmap = bitmap.GetBitmapData() ;
  62         if ( bmap == NULL )
  63             return ;
  64
  65         if ( ( bmap->HasNativeSize() && forceType == 0 ) || forceType == kControlContentIconRef )
  66         {
  67             wxBitmap scaleBmp ;
  68
  69             wxBitmapRefData* bmp = bmap ;
  70
  71             if ( !bmap->HasNativeSize() )
  72             {
  73                 // as PICT conversion will only result in a 16x16 icon, let's attempt
  74                 // a few scales for better results
  75
  76                 int w = bitmap.GetWidth() ;
  77                 int h = bitmap.GetHeight() ;
  78                 int sz = wxMax( w , h ) ;
  79                 if ( sz == 24 || sz == 64)
  80                 {
  81                     scaleBmp = wxBitmap( bitmap.ConvertToImage().Scale( w * 2 , h * 2 ) ) ;
  82                     bmp = scaleBmp.GetBitmapData() ;
  83                 }
  84             }
  85
  86             info->contentType = kControlContentIconRef ;
  87             info->u.iconRef = bmp->GetIconRef() ;
  88             AcquireIconRef( info->u.iconRef ) ;
  89         }
  90 #if wxMAC_USE_CORE_GRAPHICS && MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2
  91         else if ( forceType == kControlContentCGImageRef )
  92         {
  93             info->contentType = kControlContentCGImageRef ;
  94             info->u.imageRef = (CGImageRef) bmap->CGImageCreate() ;
  95         }
  96 #endif
  97         else
  98         {
  99             info->contentType = kControlContentPictHandle ;
 100             info->u.picture = bmap->GetPictHandle() ;
 101         }
 102     }
 103 }
 104
 105 void wxMacReleaseBitmapButton( ControlButtonContentInfo*info )
 106 {
 107     if ( info->contentType == kControlContentIconRef )
 108     {
 109         ReleaseIconRef( info->u.iconRef ) ;
 110     }
 111     else if ( info->contentType == kControlContentPictHandle )
 112     {
 113         // owned by the bitmap, no release here
 114     }
 115 #if wxMAC_USE_CORE_GRAPHICS && MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2
 116     else if ( info->contentType == kControlContentCGImageRef )
 117     {
 118         CGImageRelease( info->u.imageRef ) ;
 119     }
 120 #endif
 121     else
 122     {
 123         wxFAIL_MSG(wxT("Unexpected bitmap type") ) ;
 124     }
 125 }
 126
 127 #endif //wxUSE_BMPBUTTON
 128
 129 #define M_BITMAPDATA ((wxBitmapRefData *)m_refData)
 130
 131 void wxBitmapRefData::Init()
 132 {
 133     m_width = 0 ;
 134     m_height = 0 ;
 135     m_depth = 0 ;
 136     m_ok = false ;
 137     m_bitmapMask = NULL ;
 138 #if wxMAC_USE_CORE_GRAPHICS
 139     m_cgImageRef = NULL ;
 140 #endif
 141     m_iconRef = NULL ;
 142     m_pictHandle = NULL ;
 143     m_hBitmap = NULL ;
 144     m_hMaskBitmap = NULL;
 145     m_maskBytesPerRow = NULL ;
 146
 147     m_rawAccessCount = 0 ;
 148     m_hasAlpha = false;
 149 }
 150
 151 wxBitmapRefData::wxBitmapRefData()
 152 {
 153     Init() ;
 154 }
 155
 156 wxBitmapRefData::wxBitmapRefData( int w , int h , int d )
 157 {
 158     Init() ;
 159     Create( w , h , d ) ;
 160 }
 161
 162 bool wxBitmapRefData::Create( int w , int h , int d )
 163 {
 164     m_width = w ;
 165     m_height = h ;
 166     m_depth = d ;
 167
 168     m_bytesPerRow = w * 4 ;
 169     size_t size = m_bytesPerRow * h ;
 170     void*  data = m_memBuf.GetWriteBuf(size) ;
 171     memset( data ,  0 , size) ;
 172     m_memBuf.UngetWriteBuf(size) ;
 173
 174     m_hBitmap = NULL ;
 175     Rect rect = { 0 , 0 , m_height , m_width } ;
 176     verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_hBitmap , k32ARGBPixelFormat , &rect , NULL , NULL , 0 ,
 177         (char*) data , m_bytesPerRow ) ) ;
 178     wxASSERT_MSG( m_hBitmap , wxT("Unable to create GWorld context") ) ;
 179     m_ok = ( m_hBitmap != NULL ) ;
 180
 181     return m_ok ;
 182 }
 183
 184 void wxBitmapRefData::UseAlpha( bool use )
 185 {
 186     if ( m_hasAlpha == use )
 187         return ;
 188
 189     m_hasAlpha = use ;
 190     if ( m_hasAlpha )
 191     {
 192         int width = GetWidth() ;
 193         int height = GetHeight() ;
 194         m_maskBytesPerRow = ( width * 4 + 3 ) & 0xFFFFFFC ;
 195         size_t size = height * m_maskBytesPerRow ;
 196         unsigned char * data = (unsigned char * ) m_maskMemBuf.GetWriteBuf( size ) ;
 197         memset( data , 0 , size ) ;
 198         wxASSERT( m_hMaskBitmap == NULL ) ;
 199         Rect rect = { 0 , 0 , height , width } ;
 200         verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_hMaskBitmap , k32ARGBPixelFormat , &rect , NULL , NULL , 0 ,
 201             (char*) data , m_maskBytesPerRow ) ) ;
 202         wxASSERT_MSG( m_hMaskBitmap , wxT("Unable to create GWorld context for alpha mask") ) ;
 203         m_maskMemBuf.UngetWriteBuf(size) ;
 204 #if !wxMAC_USE_CORE_GRAPHICS
 205         UpdateAlphaMask() ;
 206 #endif
 207     }
 208     else
 209     {
 210         DisposeGWorld( m_hMaskBitmap ) ;
 211         m_hMaskBitmap = NULL ;
 212         m_maskBytesPerRow = 0 ;
 213     }
 214 }
 215
 216 void *wxBitmapRefData::GetRawAccess() const
 217 {
 218     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
 219     return m_memBuf.GetData() ;
 220 }
 221
 222 void *wxBitmapRefData::BeginRawAccess()
 223 {
 224     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") ) ;
 225     wxASSERT( m_rawAccessCount == 0 ) ;
 226     ++m_rawAccessCount ;
 227     // we must destroy an existing cached image, as
 228     // the bitmap data may change now
 229     wxASSERT_MSG( m_pictHandle == NULL && m_iconRef == NULL ,
 230         wxT("Currently, modifing bitmaps that are used in controls already is not supported") ) ;
 231 #if wxMAC_USE_CORE_GRAPHICS
 232     if ( m_cgImageRef )
 233     {
 234         CGImageRelease( m_cgImageRef ) ;
 235         m_cgImageRef = NULL ;
 236     }
 237 #endif
 238     return m_memBuf.GetData() ;
 239 }
 240
 241 void wxBitmapRefData::EndRawAccess()
 242 {
 243     wxCHECK_RET( Ok() , wxT("invalid bitmap") ) ;
 244     wxASSERT( m_rawAccessCount == 1 ) ;
 245     --m_rawAccessCount ;
 246 #if !wxMAC_USE_CORE_GRAPHICS
 247     UpdateAlphaMask() ;
 248 #endif
 249 }
 250
 251 bool wxBitmapRefData::HasNativeSize()
 252 {
 253     int w = GetWidth() ;
 254     int h = GetHeight() ;
 255     int sz = wxMax( w , h ) ;
 256
 257     if ( sz == 128 || sz == 48 || sz == 32 || sz == 16 )
 258         return true ;
 259     return false ;
 260 }
 261
 262 IconRef wxBitmapRefData::GetIconRef()
 263 {
 264     if ( m_iconRef == NULL )
 265     {
 266         // Create Icon Family Handle
 267
 268         IconFamilyHandle iconFamily = NULL ;
 269
 270         iconFamily = (IconFamilyHandle) NewHandle(8) ;
 271         (**iconFamily).resourceType = kIconFamilyType ;
 272         (**iconFamily).resourceSize = sizeof(OSType) + sizeof(Size);
 273
 274         int w = GetWidth() ;
 275         int h = GetHeight() ;
 276         int sz = wxMax( w , h ) ;
 277
 278         OSType dataType = 0 ;
 279         OSType maskType = 0 ;
 280
 281         if ( sz == 128 )
 282         {
 283             dataType = kThumbnail32BitData ;
 284             maskType = kThumbnail8BitMask ;
 285         }
 286         else if ( sz == 48 )
 287         {
 288             dataType = kHuge32BitData ;
 289             maskType = kHuge8BitMask ;
 290         }
 291         else if ( sz == 32 )
 292         {
 293             dataType = kLarge32BitData ;
 294             maskType = kLarge8BitMask ;
 295         }
 296         else if ( sz == 16 )
 297         {
 298             dataType = kSmall32BitData ;
 299             maskType = kSmall8BitMask ;
 300         }
 301
 302         if ( dataType != 0 )
 303         {
 304             // setup the header properly
 305
 306             Handle data = NULL ;
 307             Handle maskdata = NULL ;
 308             unsigned char * maskptr = NULL ;
 309             unsigned char * ptr = NULL ;
 310             size_t size ;
 311             size_t masksize ;
 312
 313             size = sz * sz * 4 ;
 314             data = NewHandle( size) ;
 315             HLock( data ) ;
 316             ptr = (unsigned char*) *data ;
 317             memset( ptr , 0, size ) ;
 318
 319             masksize = sz * sz ;
 320             maskdata = NewHandle( masksize ) ;
 321             HLock( maskdata ) ;
 322             maskptr = (unsigned char*) *maskdata ;
 323             memset( maskptr , 0 , masksize ) ;
 324
 325             bool hasAlpha = HasAlpha() ;
 326             wxMask *mask = m_bitmapMask ;
 327             unsigned char * source = (unsigned char*) GetRawAccess() ;
 328             unsigned char * masksource = mask ? (unsigned char*) mask->GetRawAccess() : NULL ;
 329             for ( int y = 0 ; y < h ; ++y )
 330             {
 331                 unsigned char * dest = ptr + y * sz * 4 ;
 332                 unsigned char * maskdest = maskptr + y * sz ;
 333                 for ( int x = 0 ; x < w ; ++x )
 334                 {
 335                     unsigned char a = *source ++ ;
 336                     unsigned char r = *source ++ ;
 337                     unsigned char g = *source ++ ;
 338                     unsigned char b = *source ++ ;
 339
 340                     *dest++ = 0 ;
 341                     *dest++ = r ;
 342                     *dest++ = g ;
 343                     *dest++ = b ;
 344
 345                     if ( mask )
 346                         *maskdest++ = *masksource++ ;
 347                     else if ( hasAlpha )
 348                         *maskdest++ = a ;
 349                     else
 350                         *maskdest++ = 0xFF ;
 351                 }
 352             }
 353
 354             OSStatus err = SetIconFamilyData( iconFamily, dataType , data ) ;
 355             wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 356
 357             err = SetIconFamilyData( iconFamily, maskType , maskdata ) ;
 358             wxASSERT_MSG( err == noErr , wxT("Error when adding mask") ) ;
 359             HUnlock( data ) ;
 360             HUnlock( maskdata ) ;
 361             DisposeHandle( data ) ;
 362             DisposeHandle( maskdata ) ;
 363         }
 364         else
 365         {
 366             PicHandle pic = GetPictHandle() ;
 367             SetIconFamilyData( iconFamily, 'PICT' , (Handle) pic ) ;
 368         }
 369
 370         // transform into IconRef
 371
 372         static int iconCounter = 2 ;
 373 #ifdef __WXDEBUG__
 374         OSStatus err =
 375 #endif
 376             RegisterIconRefFromIconFamily( 'WXNG' , (OSType) iconCounter, iconFamily, &m_iconRef ) ;
 377         wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 378         // we have to retain a reference, as Unregister will decrement it
 379         AcquireIconRef( m_iconRef ) ;
 380         UnregisterIconRef( 'WXNG' , (OSType) iconCounter ) ;
 381         DisposeHandle( (Handle) iconFamily ) ;
 382         ++iconCounter ;
 383     }
 384     return m_iconRef ;
 385 }
 386
 387 PicHandle wxBitmapRefData::GetPictHandle()
 388 {
 389     if ( m_pictHandle == NULL )
 390     {
 391         CGrafPtr        origPort = NULL ;
 392         GDHandle        origDev = NULL ;
 393         GWorldPtr       wp = NULL ;
 394         GWorldPtr       mask = NULL ;
 395         int height = GetHeight() ;
 396         int width = GetWidth() ;
 397
 398         Rect rect = { 0 , 0 , height , width } ;
 399
 400         GetGWorld( &origPort , &origDev ) ;
 401
 402         wp = GetHBITMAP( &mask ) ;
 403
 404         RgnHandle clipRgn = NULL ;
 405
 406         if ( mask )
 407         {
 408             GWorldPtr monoworld ;
 409             clipRgn = NewRgn() ;
 410             OSStatus err = NewGWorld( &monoworld , 1 , &rect , NULL , NULL , 0 ) ;
 411             verify_noerr(err) ;
 412             LockPixels( GetGWorldPixMap( monoworld ) ) ;
 413             LockPixels( GetGWorldPixMap( mask ) ) ;
 414             SetGWorld( monoworld , NULL ) ;
 415             RGBColor       white = { 0xffff ,0xffff , 0xffff } ;
 416             RGBColor       black = { 0x0000 ,0x0000 , 0x0000 } ;
 417             RGBForeColor( &black ) ;
 418             RGBBackColor( &white ) ;
 419             CopyBits(GetPortBitMapForCopyBits(mask),
 420                     GetPortBitMapForCopyBits(monoworld),
 421                     &rect,
 422                     &rect,
 423                     srcCopy,NULL);
 424             BitMapToRegion( clipRgn , (BitMap*) *GetGWorldPixMap( monoworld ) ) ;
 425             UnlockPixels( GetGWorldPixMap( monoworld ) ) ;
 426             UnlockPixels( GetGWorldPixMap( mask ) ) ;
 427             DisposeGWorld( monoworld ) ;
 428         }
 429
 430         SetGWorld( wp , NULL ) ;
 431         Rect portRect ;
 432         GetPortBounds( wp , &portRect ) ;
 433         m_pictHandle = OpenPicture(&portRect);
 434
 435         if(m_pictHandle)
 436         {
 437             RGBColor       white = { 0xffff ,0xffff , 0xffff } ;
 438             RGBColor       black = { 0x0000 ,0x0000 , 0x0000 } ;
 439             RGBForeColor( &black ) ;
 440             RGBBackColor( &white ) ;
 441
 442             if ( clipRgn )
 443                 SetClip( clipRgn ) ;
 444
 445             LockPixels( GetGWorldPixMap( wp ) ) ;
 446             CopyBits(GetPortBitMapForCopyBits(wp),
 447                     GetPortBitMapForCopyBits(wp),
 448                     &portRect,
 449                     &portRect,
 450                     srcCopy,clipRgn);
 451             UnlockPixels( GetGWorldPixMap( wp ) ) ;
 452             ClosePicture();
 453         }
 454         SetGWorld( origPort , origDev ) ;
 455         if ( clipRgn )
 456             DisposeRgn( clipRgn ) ;
 457     }
 458     return m_pictHandle ;
 459 }
 460
 461 #ifdef __WXMAC_OSX__
 462 void wxMacMemoryBufferReleaseProc(void *info, const void *data, size_t size)
 463 {
 464     wxMemoryBuffer* membuf = (wxMemoryBuffer*) info ;
 465     wxASSERT( data == membuf->GetData() ) ;
 466     delete membuf ;
 467 }
 468
 469 CGImageRef wxBitmapRefData::CGImageCreate() const
 470 {
 471     wxASSERT( m_ok ) ;
 472     wxASSERT( m_rawAccessCount >= 0 ) ;
 473     CGImageRef image ;
 474     if ( m_rawAccessCount > 0 || m_cgImageRef == NULL )
 475     {
 476         size_t imageSize = m_width * m_height * 4 ;
 477         void * dataBuffer = m_memBuf.GetData() ;
 478         int w = m_width ;
 479         int h = m_height ;
 480         CGImageAlphaInfo alphaInfo = kCGImageAlphaNoneSkipFirst ;
 481         wxMemoryBuffer* membuf = NULL ;
 482
 483         if ( m_bitmapMask )
 484         {
 485             membuf = new wxMemoryBuffer( imageSize ) ;
 486             memcpy( membuf->GetData() , dataBuffer , imageSize ) ;
 487             unsigned char *sourcemaskstart = (unsigned char *) m_bitmapMask->GetRawAccess() ;
 488             int maskrowbytes = m_bitmapMask->GetBytesPerRow() ;
 489             unsigned char *destalpha = (unsigned char *) membuf->GetData() ;
 490             alphaInfo = kCGImageAlphaFirst ;
 491             for ( int y = 0 ; y < h ; ++y , sourcemaskstart += maskrowbytes)
 492             {
 493                 unsigned char *sourcemask = sourcemaskstart ;
 494                 for( int x = 0 ; x < w ; ++x , sourcemask++ , destalpha += 4 )
 495                 {
 496                     *destalpha = *sourcemask ;
 497                 }
 498             }
 499         }
 500         else if ( m_hasAlpha )
 501         {
 502 #if wxMAC_USE_PREMULTIPLIED_ALPHA
 503             alphaInfo = kCGImageAlphaPremultipliedFirst ;
 504 #else
 505             alphaInfo = kCGImageAlphaFirst ;
 506 #endif
 507             membuf = new wxMemoryBuffer( m_memBuf ) ;
 508         }
 509         else
 510         {
 511             membuf = new wxMemoryBuffer( m_memBuf ) ;
 512         }
 513         CGColorSpaceRef colorSpace = wxMacGetGenericRGBColorSpace();
 514         CGDataProviderRef dataProvider =
 515             CGDataProviderCreateWithData( membuf , (const void *)membuf->GetData() , imageSize,
 516                 wxMacMemoryBufferReleaseProc );
 517         image =
 518             ::CGImageCreate( w, h, 8 , 32 , 4 * m_width , colorSpace, alphaInfo ,
 519                         dataProvider, NULL , false , kCGRenderingIntentDefault );
 520         CGDataProviderRelease( dataProvider);
 521     }
 522     else
 523     {
 524         image = m_cgImageRef ;
 525         CGImageRetain( image ) ;
 526     }
 527     if ( m_rawAccessCount == 0 && m_cgImageRef == NULL)
 528     {
 529         // we keep it for later use
 530         m_cgImageRef = image ;
 531         CGImageRetain( image ) ;
 532     }
 533     return image ;
 534 }
 535 #endif
 536
 537 GWorldPtr wxBitmapRefData::GetHBITMAP(GWorldPtr* mask) const
 538 {
 539     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 540     if ( mask )
 541     {
 542         *mask = NULL ;
 543         if ( m_bitmapMask )
 544             *mask = (GWorldPtr) m_bitmapMask->GetHBITMAP() ;
 545         else if ( m_hasAlpha )
 546         {
 547 #if !wxMAC_USE_CORE_GRAPHICS
 548             if ( m_rawAccessCount > 0 )
 549                 UpdateAlphaMask() ;
 550 #else
 551             // this structure is not kept in synch when using CG, so if someone
 552             // is really accessing the Graphports, we have to sync it
 553             UpdateAlphaMask() ;
 554 #endif
 555             *mask = m_hMaskBitmap ;
 556         }
 557     }
 558     return m_hBitmap ;
 559 }
 560
 561 void wxBitmapRefData::UpdateAlphaMask() const
 562 {
 563     if ( m_hasAlpha )
 564     {
 565         unsigned char *sourcemask = (unsigned char *) GetRawAccess() ;
 566         unsigned char *destalphabase = (unsigned char *) m_maskMemBuf.GetData() ;
 567
 568         int h = GetHeight() ;
 569         int w = GetWidth() ;
 570
 571         for ( int y = 0 ; y < h ; ++y , destalphabase += m_maskBytesPerRow )
 572         {
 573             unsigned char* destalpha = destalphabase ;
 574             for( int x = 0 ; x < w ; ++x , sourcemask += 4 )
 575             {
 576                 // we must have 24 bit depth for non quartz smooth alpha
 577                 *destalpha++ = 255 ;
 578                 *destalpha++ = 255  - *sourcemask ;
 579                 *destalpha++ = 255  - *sourcemask ;
 580                 *destalpha++ = 255  - *sourcemask ;
 581             }
 582         }
 583     }
 584 }
 585
 586 void wxBitmapRefData::Free()
 587 {
 588     wxASSERT_MSG( m_rawAccessCount == 0 , wxT("Bitmap still selected when destroyed") ) ;
 589
 590 #if wxMAC_USE_CORE_GRAPHICS
 591     if ( m_cgImageRef )
 592     {
 593         CGImageRelease( m_cgImageRef ) ;
 594         m_cgImageRef = NULL ;
 595     }
 596 #endif
 597     if ( m_iconRef )
 598     {
 599         ReleaseIconRef( m_iconRef ) ;
 600         m_iconRef = NULL ;
 601     }
 602     if ( m_pictHandle )
 603     {
 604         KillPicture( m_pictHandle ) ;
 605         m_pictHandle = NULL ;
 606     }
 607     if ( m_hBitmap )
 608     {
 609         DisposeGWorld( MAC_WXHBITMAP(m_hBitmap) ) ;
 610         m_hBitmap = NULL ;
 611     }
 612     if ( m_hMaskBitmap )
 613     {
 614         DisposeGWorld( MAC_WXHBITMAP(m_hMaskBitmap) ) ;
 615         m_hMaskBitmap = NULL ;
 616     }
 617
 618     if (m_bitmapMask)
 619     {
 620         delete m_bitmapMask;
 621         m_bitmapMask = NULL;
 622     }
 623 }
 624
 625 wxBitmapRefData::~wxBitmapRefData()
 626 {
 627     Free() ;
 628 }
 629
 630 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 631 {
 632     int w = icon.GetWidth() ;
 633     int h = icon.GetHeight() ;
 634
 635
 636     Create( icon.GetWidth() , icon.GetHeight() ) ;
 637
 638     bool created = false ;
 639
 640     if ( w == h && ( w == 16 || w == 32 || w == 48 || w == 128 ) )
 641     {
 642         IconFamilyHandle iconFamily = NULL ;
 643         Handle imagehandle = NewHandle(0) ;
 644         Handle maskhandle = NewHandle(0) ;
 645
 646         OSType maskType = 0;
 647         OSType dataType = 0;
 648         IconSelectorValue selector = 0 ;
 649         if ( w == 128 )
 650         {
 651             dataType = kThumbnail32BitData ;
 652             maskType = kThumbnail8BitMask ;
 653             selector = kSelectorAllAvailableData ;
 654         }
 655         else if ( w == 48 )
 656         {
 657             dataType = kHuge32BitData ;
 658             maskType = kHuge8BitMask ;
 659             selector = kSelectorHuge32Bit | kSelectorHuge8BitMask ;
 660         }
 661         else if ( w == 32 )
 662         {
 663             dataType = kLarge32BitData ;
 664             maskType = kLarge8BitMask ;
 665             selector = kSelectorLarge32Bit | kSelectorLarge8BitMask ;
 666         }
 667         else if ( w == 16 )
 668         {
 669             dataType = kSmall32BitData ;
 670             maskType = kSmall8BitMask ;
 671             selector = kSelectorSmall32Bit | kSelectorSmall8BitMask ;
 672         }
 673
 674
 675         OSStatus err = ( IconRefToIconFamily( MAC_WXHICON(icon.GetHICON()) , selector , &iconFamily ) ) ;
 676
 677         err =( GetIconFamilyData( iconFamily , dataType , imagehandle ) ) ;
 678         err =( GetIconFamilyData( iconFamily , maskType , maskhandle ) ) ;
 679         size_t imagehandlesize = GetHandleSize( imagehandle ) ;
 680         size_t maskhandlesize = GetHandleSize( maskhandle ) ;
 681
 682         if ( imagehandlesize != 0 && maskhandlesize != 0 )
 683         {
 684             wxASSERT( GetHandleSize( imagehandle ) == w * 4 * h ) ;
 685             wxASSERT( GetHandleSize( maskhandle ) == w * h ) ;
 686             UseAlpha() ;
 687             unsigned char *source = (unsigned char *) *imagehandle ;
 688             unsigned char *sourcemask = (unsigned char *) *maskhandle ;
 689
 690             unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 691             for ( int y = 0 ; y < h ; ++y )
 692             {
 693                 for ( int x = 0 ; x < w ; ++x )
 694                 {
 695                     *destination++ = *sourcemask++ ;
 696                     source++ ;
 697                     *destination++ = *source++ ;
 698                     *destination++ = *source++ ;
 699                     *destination++ = *source++ ;
 700                 }
 701             }
 702             EndRawAccess() ;
 703             DisposeHandle( imagehandle ) ;
 704             DisposeHandle( maskhandle ) ;
 705         }
 706         DisposeHandle( (Handle) iconFamily ) ;
 707
 708     }
 709
 710     if ( !created )
 711     {
 712         wxMemoryDC dc ;
 713         dc.SelectObject( *this ) ;
 714         dc.DrawIcon( icon , 0 , 0 ) ;
 715         dc.SelectObject( wxNullBitmap ) ;
 716     }
 717     return true;
 718 }
 719
 720 wxBitmap::wxBitmap()
 721 {
 722 }
 723
 724 wxBitmap::~wxBitmap()
 725 {
 726 }
 727
 728 wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
 729 {
 730     m_refData = new wxBitmapRefData( the_width , the_height , no_bits ) ;
 731
 732     if ( no_bits == 1 )
 733     {
 734         int linesize = ( the_width / (sizeof(unsigned char) * 8)) ;
 735         if ( the_width % (sizeof(unsigned char) * 8) ) {
 736             linesize += sizeof(unsigned char);
 737         }
 738         unsigned char* linestart = (unsigned char*) bits ;
 739         unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 740         for ( int y = 0 ; y < the_height ; ++y , linestart += linesize )
 741         {
 742             for ( int x = 0 ; x < the_width ; ++x )
 743             {
 744                 int index = x / 8 ;
 745                 int bit = x % 8 ;
 746                 int mask = 1 << bit ;
 747                 if ( linestart[index] & mask )
 748                 {
 749                     *destination++ = 0xFF ;
 750                     *destination++ = 0 ;
 751                     *destination++ = 0 ;
 752                     *destination++ = 0 ;
 753                 }
 754                 else
 755                 {
 756                     *destination++ = 0xFF ;
 757                     *destination++ = 0xFF ;
 758                     *destination++ = 0xFF ;
 759                     *destination++ = 0xFF ;
 760                 }
 761             }
 762         }
 763         EndRawAccess() ;
 764     }
 765     else
 766     {
 767         wxFAIL_MSG(wxT("multicolor BITMAPs not yet implemented"));
 768     }
 769 }
 770
 771 wxBitmap::wxBitmap(int w, int h, int d)
 772 {
 773     (void)Create(w, h, d);
 774 }
 775
 776 wxBitmap::wxBitmap(void *data, wxBitmapType type, int width, int height, int depth)
 777 {
 778     (void) Create(data, type, width, height, depth);
 779 }
 780
 781 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
 782 {
 783     LoadFile(filename, type);
 784 }
 785
 786 wxBitmap::wxBitmap(const char **bits)
 787 {
 788     (void) CreateFromXpm(bits);
 789 }
 790
 791 wxBitmap::wxBitmap(char **bits)
 792 {
 793     (void) CreateFromXpm((const char **)bits);
 794 }
 795
 796 void* wxBitmap::GetRawAccess() const
 797 {
 798     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 799     return M_BITMAPDATA->GetRawAccess() ;
 800 }
 801
 802 void* wxBitmap::BeginRawAccess()
 803 {
 804     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 805     return M_BITMAPDATA->BeginRawAccess() ;
 806 }
 807
 808 void wxBitmap::EndRawAccess()
 809 {
 810     wxCHECK_RET( Ok() , wxT("invalid bitmap") ) ;
 811     M_BITMAPDATA->EndRawAccess() ;
 812 }
 813
 814 bool wxBitmap::CreateFromXpm(const char **bits)
 815 {
 816 #if wxUSE_IMAGE
 817     wxCHECK_MSG( bits != NULL, FALSE, wxT("invalid bitmap data") )
 818     wxXPMDecoder decoder;
 819     wxImage img = decoder.ReadData(bits);
 820     wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") )
 821     *this = wxBitmap(img);
 822     return TRUE;
 823 #else
 824     return FALSE;
 825 #endif
 826 }
 827
 828 #ifdef __WXMAC_OSX__
 829 WXCGIMAGEREF wxBitmap::CGImageCreate() const
 830 {
 831     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
 832     return M_BITMAPDATA->CGImageCreate() ;
 833 }
 834 #endif
 835
 836 wxBitmap wxBitmap::GetSubBitmap(const wxRect &rect) const
 837 {
 838     wxCHECK_MSG( Ok() &&
 839                 (rect.x >= 0) && (rect.y >= 0) &&
 840                 (rect.x+rect.width <= GetWidth()) &&
 841                 (rect.y+rect.height <= GetHeight()),
 842                 wxNullBitmap, wxT("invalid bitmap or bitmap region") );
 843
 844
 845     wxBitmap ret( rect.width, rect.height, GetDepth() );
 846     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 847
 848
 849     int sourcewidth = GetWidth() ;
 850     int destwidth = rect.width ;
 851     int destheight = rect.height ;
 852     {
 853         unsigned char * sourcedata = (unsigned char*) GetRawAccess() ;
 854         unsigned char * destdata = (unsigned char*) ret.BeginRawAccess() ;
 855         int sourcelinesize = sourcewidth * 4 ;
 856         int destlinesize = destwidth * 4 ;
 857         unsigned char *source = sourcedata + rect.x * 4 + rect.y * sourcelinesize ;
 858         unsigned char *dest = destdata ;
 859         for(int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
 860         {
 861             memcpy( dest , source , destlinesize ) ;
 862         }
 863     }
 864     ret.EndRawAccess() ;
 865
 866     if ( M_BITMAPDATA->m_bitmapMask )
 867     {
 868         wxMemoryBuffer maskbuf ;
 869         int rowBytes = ( destwidth + 3 ) & 0xFFFFFFC ;
 870         size_t maskbufsize = rowBytes * destheight ;
 871         unsigned char * destdata = (unsigned char * ) maskbuf.GetWriteBuf( maskbufsize ) ;
 872
 873         int sourcelinesize = M_BITMAPDATA->m_bitmapMask->GetBytesPerRow()  ;
 874         int destlinesize = rowBytes ;
 875         unsigned char *source = (unsigned char *) M_BITMAPDATA->m_bitmapMask->GetRawAccess() ;
 876         source += rect.x + rect.y * sourcelinesize ;
 877         unsigned char *dest = destdata ;
 878
 879         for(int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
 880         {
 881             memcpy( dest , source , destlinesize ) ;
 882         }
 883         maskbuf.UngetWriteBuf( maskbufsize ) ;
 884         ret.SetMask( new wxMask( maskbuf , destwidth , destheight , rowBytes ) ) ;
 885     }
 886     else if ( HasAlpha() )
 887         ret.UseAlpha() ;
 888
 889     return ret;
 890 }
 891
 892 bool wxBitmap::Create(int w, int h, int d)
 893 {
 894     UnRef();
 895
 896     if ( d < 0 )
 897         d = wxDisplayDepth() ;
 898
 899     m_refData = new wxBitmapRefData( w , h , d );
 900
 901     return M_BITMAPDATA->Ok() ;
 902 }
 903
 904 bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
 905 {
 906     UnRef();
 907
 908     wxBitmapHandler *handler = FindHandler(type);
 909
 910     if ( handler )
 911     {
 912         m_refData = new wxBitmapRefData;
 913
 914         return handler->LoadFile(this, filename, type, -1, -1);
 915     }
 916     else
 917     {
 918 #if wxUSE_IMAGE
 919         wxImage loadimage(filename, type);
 920         if (loadimage.Ok()) {
 921             *this = loadimage;
 922             return true;
 923         }
 924 #endif
 925     }
 926     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
 927     return false;
 928 }
 929
 930 bool wxBitmap::Create(void *data, wxBitmapType type, int width, int height, int depth)
 931 {
 932     UnRef();
 933
 934     m_refData = new wxBitmapRefData;
 935
 936     wxBitmapHandler *handler = FindHandler(type);
 937
 938     if ( handler == NULL ) {
 939         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
 940
 941         return FALSE;
 942     }
 943
 944     return handler->Create(this, data, type, width, height, depth);
 945 }
 946
 947 #if wxUSE_IMAGE
 948
 949 wxBitmap::wxBitmap(const wxImage& image, int depth)
 950 {
 951     wxCHECK_RET( image.Ok(), wxT("invalid image") )
 952
 953     // width and height of the device-dependent bitmap
 954     int width = image.GetWidth();
 955     int height = image.GetHeight();
 956
 957     m_refData = new wxBitmapRefData( width , height , depth ) ;;
 958
 959     // Create picture
 960
 961     bool hasAlpha = false ;
 962
 963     if ( image.HasMask() )
 964     {
 965         // takes precedence, don't mix with alpha info
 966     }
 967     else
 968     {
 969         hasAlpha = image.HasAlpha() ;
 970     }
 971
 972     if ( hasAlpha )
 973         UseAlpha() ;
 974
 975     unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 976
 977     register unsigned char* data = image.GetData();
 978     const unsigned char *alpha = hasAlpha ? image.GetAlpha() : NULL ;
 979     for (int y = 0; y < height; y++)
 980     {
 981         for (int x = 0; x < width; x++)
 982         {
 983             if ( hasAlpha )
 984             {
 985                 const unsigned char a = *alpha++;
 986                 *destination++ = a ;
 987 #if wxMAC_USE_PREMULTIPLIED_ALPHA
 988                 *destination++ = ((*data++) * a + 127 ) / 255 ;
 989                 *destination++ = ((*data++) * a + 127 ) / 255 ;
 990                 *destination++ = ((*data++) * a + 127 ) / 255 ;
 991 #else
 992                 *destination++ = *data++ ;
 993                 *destination++ = *data++ ;
 994                 *destination++ = *data++ ;
 995 #endif
 996             }
 997             else
 998             {
 999                 *destination++ = 0xFF ;
1000                 *destination++ = *data++ ;
1001                 *destination++ = *data++ ;
1002                 *destination++ = *data++ ;
1003             }
1004         }
1005     }
1006     EndRawAccess() ;
1007     if ( image.HasMask() )
1008     {
1009         SetMask( new wxMask( *this , wxColour( image.GetMaskRed() , image.GetMaskGreen() , image.GetMaskBlue() ) ) ) ;
1010     }
1011 }
1012
1013 wxImage wxBitmap::ConvertToImage() const
1014 {
1015     wxImage image;
1016
1017     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
1018
1019     // create an wxImage object
1020     int width = GetWidth();
1021     int height = GetHeight();
1022     image.Create( width, height );
1023
1024     unsigned char *data = image.GetData();
1025     wxCHECK_MSG( data, wxNullImage, wxT("Could not allocate data for image") );
1026
1027     unsigned char* source = (unsigned char*) GetRawAccess() ;
1028
1029     bool hasAlpha = false ;
1030     bool hasMask = false ;
1031     int maskBytesPerRow = 0 ;
1032     unsigned char *alpha = NULL ;
1033     unsigned char *mask = NULL ;
1034     if ( HasAlpha() )
1035     {
1036         hasAlpha = true ;
1037     }
1038
1039     if ( GetMask() )
1040     {
1041         hasMask = true ;
1042         mask = (unsigned char*) GetMask()->GetRawAccess() ;
1043         maskBytesPerRow = GetMask()->GetBytesPerRow() ;
1044     }
1045
1046     if ( hasAlpha )
1047     {
1048         image.SetAlpha() ;
1049         alpha = image.GetAlpha() ;
1050     }
1051     int index = 0;
1052
1053     // The following masking algorithm is the same as well in msw/gtk:
1054     // the colour used as transparent one in wxImage and the one it is
1055     // replaced with when it really occurs in the bitmap
1056     static const int MASK_RED = 1;
1057     static const int MASK_GREEN = 2;
1058     static const int MASK_BLUE = 3;
1059     static const int MASK_BLUE_REPLACEMENT = 2;
1060
1061     for (int yy = 0; yy < height; yy++ , mask += maskBytesPerRow )
1062     {
1063         unsigned char * maskp = mask ;
1064         for (int xx = 0; xx < width; xx++)
1065         {
1066             long color = *((long*) source) ;
1067             unsigned char a = ((color&0xFF000000) >> 24) ;
1068             unsigned char r = ((color&0x00FF0000) >> 16) ;
1069             unsigned char g = ((color&0x0000FF00) >> 8) ;
1070             unsigned char b = (color&0x000000FF);
1071             if ( hasMask )
1072             {
1073                 if ( *maskp++ == 0 )
1074                 {
1075                     if ( r == MASK_RED && g == MASK_GREEN && b == MASK_BLUE )
1076                         b = MASK_BLUE_REPLACEMENT ;
1077                     else
1078                     {
1079                         r = MASK_RED ;
1080                         g = MASK_GREEN ;
1081                         b = MASK_BLUE ;
1082                     }
1083                 }
1084             }
1085             else if ( hasAlpha )
1086                 *alpha++ = a ;
1087
1088             data[index    ] = r ;
1089             data[index + 1] = g ;
1090             data[index + 2] = b ;
1091             index += 3;
1092             source += 4 ;
1093         }
1094     }
1095     if ( hasMask )
1096         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1097     return image;
1098 }
1099
1100 #endif //wxUSE_IMAGE
1101
1102 bool wxBitmap::SaveFile(const wxString& filename, wxBitmapType type,
1103                         const wxPalette *palette) const
1104 {
1105     wxBitmapHandler *handler = FindHandler(type);
1106
1107     if ( handler )
1108     {
1109         return handler->SaveFile(this, filename, type, palette);
1110     }
1111     else
1112     {
1113 #if wxUSE_IMAGE
1114         wxImage image = ConvertToImage();
1115         return image.SaveFile(filename, type);
1116 #endif
1117     }
1118
1119     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1120     return false;
1121 }
1122
1123 bool wxBitmap::Ok() const
1124 {
1125    return (M_BITMAPDATA && M_BITMAPDATA->Ok());
1126 }
1127
1128 int wxBitmap::GetHeight() const
1129 {
1130    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1131
1132    return M_BITMAPDATA->GetHeight();
1133 }
1134
1135 int wxBitmap::GetWidth() const
1136 {
1137    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1138
1139    return M_BITMAPDATA->GetWidth() ;
1140 }
1141
1142 int wxBitmap::GetDepth() const
1143 {
1144    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1145
1146    return M_BITMAPDATA->GetDepth();
1147 }
1148
1149 #if WXWIN_COMPATIBILITY_2_4
1150
1151 int wxBitmap::GetQuality() const
1152 {
1153     return 0;
1154 }
1155
1156 #endif
1157
1158 wxMask *wxBitmap::GetMask() const
1159 {
1160    wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1161
1162    return M_BITMAPDATA->m_bitmapMask;
1163 }
1164
1165 bool wxBitmap::HasAlpha() const
1166 {
1167    wxCHECK_MSG( Ok(), false , wxT("invalid bitmap") );
1168
1169    return M_BITMAPDATA->HasAlpha() ;
1170 }
1171
1172 void wxBitmap::SetWidth(int w)
1173 {
1174     if (!M_BITMAPDATA)
1175         m_refData = new wxBitmapRefData;
1176
1177     M_BITMAPDATA->SetWidth(w);
1178 }
1179
1180 void wxBitmap::SetHeight(int h)
1181 {
1182     if (!M_BITMAPDATA)
1183         m_refData = new wxBitmapRefData;
1184
1185     M_BITMAPDATA->SetHeight(h);
1186 }
1187
1188 void wxBitmap::SetDepth(int d)
1189 {
1190     if (!M_BITMAPDATA)
1191         m_refData = new wxBitmapRefData;
1192
1193     M_BITMAPDATA->SetDepth(d);
1194 }
1195
1196 #if WXWIN_COMPATIBILITY_2_4
1197
1198 void wxBitmap::SetQuality(int WXUNUSED(quality))
1199 {
1200 }
1201
1202 #endif
1203
1204 void wxBitmap::SetOk(bool isOk)
1205 {
1206     if (!M_BITMAPDATA)
1207         m_refData = new wxBitmapRefData;
1208
1209     M_BITMAPDATA->SetOk(isOk);
1210 }
1211
1212 #if wxUSE_PALETTE
1213 wxPalette *wxBitmap::GetPalette() const
1214 {
1215    wxCHECK_MSG( Ok(), NULL, wxT("Invalid bitmap  GetPalette()") );
1216
1217    return &M_BITMAPDATA->m_bitmapPalette;
1218 }
1219
1220 void wxBitmap::SetPalette(const wxPalette& palette)
1221 {
1222     if (!M_BITMAPDATA)
1223         m_refData = new wxBitmapRefData;
1224
1225     M_BITMAPDATA->m_bitmapPalette = palette ;
1226 }
1227 #endif // wxUSE_PALETTE
1228
1229 void wxBitmap::SetMask(wxMask *mask)
1230 {
1231     if (!M_BITMAPDATA)
1232         m_refData = new wxBitmapRefData;
1233
1234     // Remove existing mask if there is one.
1235     delete M_BITMAPDATA->m_bitmapMask;
1236
1237     M_BITMAPDATA->m_bitmapMask = mask ;
1238 }
1239
1240 WXHBITMAP wxBitmap::GetHBITMAP(WXHBITMAP* mask) const
1241 {
1242     return WXHBITMAP(M_BITMAPDATA->GetHBITMAP((GWorldPtr*)mask));
1243 }
1244
1245 // ----------------------------------------------------------------------------
1246 // wxMask
1247 // ----------------------------------------------------------------------------
1248
1249 wxMask::wxMask()
1250 {
1251     Init() ;
1252 }
1253
1254 // Construct a mask from a bitmap and a colour indicating
1255 // the transparent area
1256 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
1257 {
1258     Init() ;
1259     Create(bitmap, colour);
1260 }
1261
1262 // Construct a mask from a mono bitmap (copies the bitmap).
1263 wxMask::wxMask(const wxBitmap& bitmap)
1264 {
1265     Init() ;
1266     Create(bitmap);
1267 }
1268
1269 // Construct a mask from a mono bitmap (copies the bitmap).
1270 wxMask::wxMask(const wxMemoryBuffer& data, int width , int height , int bytesPerRow )
1271 {
1272     Init() ;
1273     Create(data, width , height , bytesPerRow );
1274 }
1275
1276 wxMask::~wxMask()
1277 {
1278     if ( m_maskBitmap )
1279     {
1280         DisposeGWorld( (GWorldPtr) m_maskBitmap ) ;
1281         m_maskBitmap = NULL ;
1282     }
1283 }
1284
1285 void wxMask::Init()
1286 {
1287     m_width = m_height = m_bytesPerRow = 0 ;
1288     m_maskBitmap = NULL ;
1289 }
1290
1291 void *wxMask::GetRawAccess() const
1292 {
1293     return m_memBuf.GetData() ;
1294 }
1295
1296 // this can be a k8IndexedGrayPixelFormat GWorld, because it never stores other values than black or white
1297 // so no rainbox colors will be created by QD when blitting
1298
1299 void wxMask::RealizeNative()
1300 {
1301     if ( m_maskBitmap )
1302     {
1303        DisposeGWorld(  (GWorldPtr) m_maskBitmap ) ;
1304        m_maskBitmap = NULL ;
1305     }
1306     Rect rect = { 0 , 0 , m_height , m_width } ;
1307     verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_maskBitmap , k8IndexedGrayPixelFormat , &rect , NULL , NULL , 0 ,
1308         (char*) m_memBuf.GetData() , m_bytesPerRow ) ) ;
1309 }
1310
1311 // Create a mask from a mono bitmap (copies the bitmap).
1312 bool wxMask::Create(const wxMemoryBuffer& data,int width , int height , int bytesPerRow)
1313 {
1314     m_memBuf = data ;
1315     m_width = width ;
1316     m_height = height ;
1317     m_bytesPerRow = bytesPerRow ;
1318     wxASSERT( data.GetDataLen() == (size_t)(height * bytesPerRow) ) ;
1319     RealizeNative() ;
1320     return true ;
1321 }
1322
1323 // Create a mask from a mono bitmap (copies the bitmap).
1324 bool wxMask::Create(const wxBitmap& bitmap)
1325 {
1326     m_width = bitmap.GetWidth() ;
1327     m_height = bitmap.GetHeight() ;
1328     m_bytesPerRow = ( m_width + 3 ) & 0xFFFFFFC ;
1329     size_t size = m_bytesPerRow * m_height ;
1330     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1331     memset( destdatabase , 0 , size ) ;
1332     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1333     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow )
1334     {
1335         unsigned char *destdata= destdatabase ;
1336         for( int x = 0 ; x < m_width ; ++x )
1337         {
1338             srcdata++ ;
1339             unsigned char r = *srcdata++ ;
1340             unsigned char g = *srcdata++ ;
1341             unsigned char b = *srcdata++ ;
1342             if ( ( r + g + b ) > 0x10 )
1343                 *destdata++ = 0x00 ;
1344             else
1345                 *destdata++ = 0xFF ;
1346         }
1347     }
1348     m_memBuf.UngetWriteBuf( size ) ;
1349     RealizeNative() ;
1350     return TRUE;
1351 }
1352
1353 // Create a mask from a bitmap and a colour indicating
1354 // the transparent area
1355 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1356 {
1357     m_width = bitmap.GetWidth() ;
1358     m_height = bitmap.GetHeight() ;
1359     m_bytesPerRow = ( m_width + 3 ) & 0xFFFFFFC ;
1360     size_t size = m_bytesPerRow * m_height ;
1361
1362     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1363     memset( destdatabase , 0 , size ) ;
1364     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1365     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow)
1366     {
1367         unsigned char *destdata= destdatabase ;
1368         for( int x = 0 ; x < m_width ; ++x )
1369         {
1370             srcdata++ ;
1371             unsigned char r = *srcdata++ ;
1372             unsigned char g = *srcdata++ ;
1373             unsigned char b = *srcdata++ ;
1374             if ( colour == wxColour( r , g , b) )
1375                 *destdata++ = 0x00 ;
1376             else
1377                 *destdata++ = 0xFF ;
1378         }
1379     }
1380     m_memBuf.UngetWriteBuf( size ) ;
1381     RealizeNative() ;
1382     return TRUE;
1383 }
1384
1385 WXHBITMAP wxMask::GetHBITMAP() const
1386 {
1387     return m_maskBitmap ;
1388 }
1389
1390 // ----------------------------------------------------------------------------
1391 // wxBitmapHandler
1392 // ----------------------------------------------------------------------------
1393
1394 wxBitmapHandler::~wxBitmapHandler()
1395 {
1396 }
1397
1398 bool wxBitmapHandler::Create(wxBitmap *bitmap, void *data, long type, int width, int height, int depth)
1399 {
1400     return FALSE;
1401 }
1402
1403 bool wxBitmapHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1404         int desiredWidth, int desiredHeight)
1405 {
1406     return FALSE;
1407 }
1408
1409 bool wxBitmapHandler::SaveFile(const wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette)
1410 {
1411     return FALSE;
1412 }
1413
1414 // ----------------------------------------------------------------------------
1415 // Standard Handlers
1416 // ----------------------------------------------------------------------------
1417
1418 class WXDLLEXPORT wxPICTResourceHandler: public wxBitmapHandler
1419 {
1420     DECLARE_DYNAMIC_CLASS(wxPICTResourceHandler)
1421 public:
1422     inline wxPICTResourceHandler()
1423     {
1424         SetName(wxT("Macintosh Pict resource"));
1425         SetExtension(wxEmptyString);
1426         SetType(wxBITMAP_TYPE_PICT_RESOURCE);
1427     };
1428
1429     virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1430           int desiredWidth, int desiredHeight);
1431 };
1432 IMPLEMENT_DYNAMIC_CLASS(wxPICTResourceHandler, wxBitmapHandler)
1433
1434
1435 bool  wxPICTResourceHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1436           int desiredWidth, int desiredHeight)
1437 {
1438 #if wxUSE_METAFILE
1439     Str255 theName ;
1440     wxMacStringToPascal( name , theName ) ;
1441
1442     PicHandle thePict = (PicHandle ) GetNamedResource( 'PICT' , theName ) ;
1443     if ( thePict )
1444     {
1445         wxMetafile mf ;
1446         mf.SetHMETAFILE((WXHMETAFILE) thePict ) ;
1447         bitmap->Create( mf.GetWidth() , mf.GetHeight() ) ;
1448         wxMemoryDC dc ;
1449         dc.SelectObject( *bitmap ) ;
1450         mf.Play( &dc ) ;
1451         dc.SelectObject( wxNullBitmap ) ;
1452         return TRUE ;
1453     }
1454 #endif //wxUSE_METAFILE
1455     return FALSE ;
1456 }
1457
1458
1459 void wxBitmap::InitStandardHandlers()
1460 {
1461     AddHandler(new wxPICTResourceHandler) ;
1462     AddHandler(new wxICONResourceHandler) ;
1463 }
1464
1465 // ----------------------------------------------------------------------------
1466 // raw bitmap access support
1467 // ----------------------------------------------------------------------------
1468
1469 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1470 {
1471     if ( !Ok() )
1472     {
1473         // no bitmap, no data (raw or otherwise)
1474         return NULL;
1475     }
1476
1477     data.m_width = GetWidth() ;
1478     data.m_height = GetHeight() ;
1479     data.m_stride = GetWidth() * 4 ;
1480     return GetRawAccess() ;
1481 }
1482
1483 void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
1484 {
1485     if ( !Ok() )
1486         return;
1487
1488     // TODO : if we have some information about the API we should check
1489     // this code looks strange...
1490
1491     if ( M_BITMAPDATA->HasAlpha() )
1492     {
1493         wxAlphaPixelData& data = (wxAlphaPixelData&)dataBase;
1494
1495         int w = data.GetWidth(),
1496             h = data.GetHeight();
1497
1498         wxBitmap bmpMask(GetWidth(), GetHeight(), 32);
1499         wxAlphaPixelData dataMask(bmpMask, data.GetOrigin(), wxSize(w, h));
1500         wxAlphaPixelData::Iterator pMask(dataMask),
1501                                    p(data);
1502         for ( int y = 0; y < h; y++ )
1503         {
1504             wxAlphaPixelData::Iterator rowStartMask = pMask,
1505                                        rowStart = p;
1506
1507             for ( int x = 0; x < w; x++ )
1508             {
1509                 const wxAlphaPixelData::Iterator::ChannelType
1510                     alpha = p.Alpha();
1511
1512                 pMask.Red() = alpha;
1513                 pMask.Green() = alpha;
1514                 pMask.Blue() = alpha;
1515
1516                 ++p;
1517                 ++pMask;
1518             }
1519
1520             p = rowStart;
1521             p.OffsetY(data, 1);
1522
1523             pMask = rowStartMask;
1524             pMask.OffsetY(dataMask, 1);
1525         }
1526
1527         SetMask(new wxMask(bmpMask));
1528     }
1529 }
1530
1531 void wxBitmap::UseAlpha()
1532 {
1533     // remember that we are using alpha channel, we'll need to create a proper
1534     // mask in UngetRawData()
1535     M_BITMAPDATA->UseAlpha( true );
1536 }