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 #include "wx/wxprec.h"
  13
  14 #include "wx/bitmap.h"
  15 #include "wx/icon.h"
  16 #include "wx/log.h"
  17 #include "wx/image.h"
  18 #include "wx/metafile.h"
  19 #include "wx/xpmdecod.h"
  20
  21 #include "wx/rawbmp.h"
  22
  23 IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
  24 IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
  25 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject)
  26
  27 #ifdef __DARWIN__
  28     #include <ApplicationServices/ApplicationServices.h>
  29 #else
  30     #include <PictUtils.h>
  31 #endif
  32
  33 #include "wx/mac/uma.h"
  34 #include "wx/dcmemory.h"
  35
  36 // Implementation Notes
  37 // --------------------
  38 //
  39 // we are always working with a 32 bit deep pixel buffer
  40 // under QuickDraw its alpha parts are going to be ignored in the GWorld,
  41 // therefore we have a separate GWorld there for blitting the mask in
  42
  43 // under Quartz then content is transformed into a CGImageRef representing the same data
  44 // which can be transferred to the GPU by the OS for fast rendering
  45
  46 // we don't dare use premultiplied alpha yet
  47 #define wxMAC_USE_PREMULTIPLIED_ALPHA 0
  48
  49 #if wxUSE_BMPBUTTON
  50
  51 void wxMacCreateBitmapButton( ControlButtonContentInfo*info , const wxBitmap& bitmap , int forceType )
  52 {
  53     memset( info , 0 , sizeof(ControlButtonContentInfo) ) ;
  54     if ( bitmap.Ok() )
  55     {
  56         wxBitmapRefData * bmap = bitmap.GetBitmapData() ;
  57         if ( bmap == NULL )
  58             return ;
  59
  60         if ( ( bmap->HasNativeSize() && forceType == 0 ) || forceType == kControlContentIconRef )
  61         {
  62             wxBitmap scaleBmp ;
  63             wxBitmapRefData* bmp = bmap ;
  64
  65             if ( !bmap->HasNativeSize() )
  66             {
  67                 // as PICT conversion will only result in a 16x16 icon, let's attempt
  68                 // a few scales for better results
  69
  70                 int w = bitmap.GetWidth() ;
  71                 int h = bitmap.GetHeight() ;
  72                 int sz = wxMax( w , h ) ;
  73                 if ( sz == 24 || sz == 64 )
  74                 {
  75                     scaleBmp = wxBitmap( bitmap.ConvertToImage().Scale( w * 2 , h * 2 ) ) ;
  76                     bmp = scaleBmp.GetBitmapData() ;
  77                 }
  78             }
  79
  80             info->contentType = kControlContentIconRef ;
  81             info->u.iconRef = bmp->GetIconRef() ;
  82             AcquireIconRef( info->u.iconRef ) ;
  83         }
  84 #if defined( __WXMAC_OSX__ ) && MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2
  85         else if ( forceType == kControlContentCGImageRef )
  86         {
  87             info->contentType = kControlContentCGImageRef ;
  88             info->u.imageRef = (CGImageRef) bmap->CGImageCreate() ;
  89         }
  90 #endif
  91         else
  92         {
  93             info->contentType = kControlContentPictHandle ;
  94             info->u.picture = bmap->GetPictHandle() ;
  95         }
  96     }
  97 }
  98
  99 void wxMacReleaseBitmapButton( ControlButtonContentInfo*info )
 100 {
 101     if ( info->contentType == kControlContentIconRef )
 102     {
 103         ReleaseIconRef( info->u.iconRef ) ;
 104     }
 105     else if ( info->contentType == kControlNoContent )
 106     {
 107         // there's no bitmap at all, fall through silently
 108     }
 109     else if ( info->contentType == kControlContentPictHandle )
 110     {
 111         // owned by the bitmap, no release here
 112     }
 113 #if defined( __WXMAC_OSX__ ) && MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2
 114     else if ( info->contentType == kControlContentCGImageRef )
 115     {
 116         CGImageRelease( info->u.imageRef ) ;
 117     }
 118 #endif
 119     else
 120     {
 121         wxFAIL_MSG(wxT("Unexpected bitmap type") ) ;
 122     }
 123 }
 124
 125 #endif //wxUSE_BMPBUTTON
 126
 127 #define M_BITMAPDATA ((wxBitmapRefData *)m_refData)
 128
 129 void wxBitmapRefData::Init()
 130 {
 131     m_width = 0 ;
 132     m_height = 0 ;
 133     m_depth = 0 ;
 134     m_ok = false ;
 135     m_bitmapMask = NULL ;
 136
 137 #ifdef __WXMAC_OSX__
 138     m_cgImageRef = NULL ;
 139 #endif
 140
 141     m_iconRef = NULL ;
 142     m_pictHandle = NULL ;
 143     m_hBitmap = NULL ;
 144     m_hMaskBitmap = NULL;
 145     m_maskBytesPerRow = 0 ;
 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
 180     m_ok = ( m_hBitmap != NULL ) ;
 181
 182     return m_ok ;
 183 }
 184
 185 void wxBitmapRefData::UseAlpha( bool use )
 186 {
 187     if ( m_hasAlpha == use )
 188         return ;
 189
 190     m_hasAlpha = use ;
 191     if ( m_hasAlpha )
 192     {
 193         wxASSERT( m_hMaskBitmap == NULL ) ;
 194
 195         int width = GetWidth() ;
 196         int height = GetHeight() ;
 197         m_maskBytesPerRow = ( width * 4 + 3 ) & 0xFFFFFFC ;
 198         size_t size = height * m_maskBytesPerRow ;
 199         unsigned char * data = (unsigned char * ) m_maskMemBuf.GetWriteBuf( size ) ;
 200         wxASSERT( data != NULL ) ;
 201
 202         memset( data , 0 , size ) ;
 203         Rect rect = { 0 , 0 , height , width } ;
 204         verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_hMaskBitmap , k32ARGBPixelFormat , &rect , NULL , NULL , 0 ,
 205             (char*) data , m_maskBytesPerRow ) ) ;
 206         wxASSERT_MSG( m_hMaskBitmap , wxT("Unable to create GWorld context for alpha mask") ) ;
 207         m_maskMemBuf.UngetWriteBuf(size) ;
 208
 209 #if !wxMAC_USE_CORE_GRAPHICS
 210         UpdateAlphaMask() ;
 211 #endif
 212     }
 213     else
 214     {
 215         DisposeGWorld( m_hMaskBitmap ) ;
 216         m_hMaskBitmap = NULL ;
 217         m_maskBytesPerRow = 0 ;
 218     }
 219 }
 220
 221 void *wxBitmapRefData::GetRawAccess() const
 222 {
 223     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
 224     return m_memBuf.GetData() ;
 225 }
 226
 227 void *wxBitmapRefData::BeginRawAccess()
 228 {
 229     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") ) ;
 230     wxASSERT( m_rawAccessCount == 0 ) ;
 231     wxASSERT_MSG( m_pictHandle == NULL && m_iconRef == NULL ,
 232         wxT("Currently, modifing bitmaps that are used in controls already is not supported") ) ;
 233
 234     ++m_rawAccessCount ;
 235
 236 #ifdef __WXMAC_OSX__
 237     // we must destroy an existing cached image, as
 238     // the bitmap data may change now
 239     if ( m_cgImageRef )
 240     {
 241         CGImageRelease( m_cgImageRef ) ;
 242         m_cgImageRef = NULL ;
 243     }
 244 #endif
 245
 246     return m_memBuf.GetData() ;
 247 }
 248
 249 void wxBitmapRefData::EndRawAccess()
 250 {
 251     wxCHECK_RET( Ok() , wxT("invalid bitmap") ) ;
 252     wxASSERT( m_rawAccessCount == 1 ) ;
 253
 254     --m_rawAccessCount ;
 255
 256 #if !wxMAC_USE_CORE_GRAPHICS
 257     UpdateAlphaMask() ;
 258 #endif
 259 }
 260
 261 bool wxBitmapRefData::HasNativeSize()
 262 {
 263     int w = GetWidth() ;
 264     int h = GetHeight() ;
 265     int sz = wxMax( w , h ) ;
 266
 267     return ( sz == 128 || sz == 48 || sz == 32 || sz == 16 );
 268 }
 269
 270 IconRef wxBitmapRefData::GetIconRef()
 271 {
 272     if ( m_iconRef == NULL )
 273     {
 274         // Create Icon Family Handle
 275
 276         IconFamilyHandle iconFamily = NULL ;
 277
 278 #ifdef WORDS_BIGENDIAN
 279         iconFamily = (IconFamilyHandle) NewHandle( 8 ) ;
 280         (**iconFamily).resourceType = kIconFamilyType ;
 281         (**iconFamily).resourceSize = sizeof(OSType) + sizeof(Size);
 282 #else
 283         // test this solution on big endian as well
 284         iconFamily = (IconFamilyHandle) NewHandle( 0 ) ;
 285 #endif
 286
 287         int w = GetWidth() ;
 288         int h = GetHeight() ;
 289         int sz = wxMax( w , h ) ;
 290
 291         OSType dataType = 0 ;
 292         OSType maskType = 0 ;
 293
 294         switch (sz)
 295         {
 296             case 128:
 297                 dataType = kThumbnail32BitData ;
 298                 maskType = kThumbnail8BitMask ;
 299                 break;
 300
 301             case 48:
 302                 dataType = kHuge32BitData ;
 303                 maskType = kHuge8BitMask ;
 304                 break;
 305
 306             case 32:
 307                 dataType = kLarge32BitData ;
 308                 maskType = kLarge8BitMask ;
 309                 break;
 310
 311             case 16:
 312                 dataType = kSmall32BitData ;
 313                 maskType = kSmall8BitMask ;
 314                 break;
 315
 316             default:
 317                 break;
 318         }
 319
 320         if ( dataType != 0 )
 321         {
 322             // setup the header properly
 323
 324             Handle data = NULL ;
 325             Handle maskdata = NULL ;
 326             unsigned char * maskptr = NULL ;
 327             unsigned char * ptr = NULL ;
 328             size_t datasize, masksize ;
 329
 330             datasize = sz * sz * 4 ;
 331             data = NewHandle( datasize ) ;
 332             HLock( data ) ;
 333             ptr = (unsigned char*) *data ;
 334             memset( ptr , 0, datasize ) ;
 335
 336             masksize = sz * sz ;
 337             maskdata = NewHandle( masksize ) ;
 338             HLock( maskdata ) ;
 339             maskptr = (unsigned char*) *maskdata ;
 340             memset( maskptr , 0 , masksize ) ;
 341
 342             bool hasAlpha = HasAlpha() ;
 343             wxMask *mask = m_bitmapMask ;
 344             unsigned char * source = (unsigned char*) GetRawAccess() ;
 345             unsigned char * masksource = mask ? (unsigned char*) mask->GetRawAccess() : NULL ;
 346
 347             for ( int y = 0 ; y < h ; ++y )
 348             {
 349                 unsigned char * dest = ptr + y * sz * 4 ;
 350                 unsigned char * maskdest = maskptr + y * sz ;
 351                 unsigned char a, r, g, b;
 352
 353                 for ( int x = 0 ; x < w ; ++x )
 354                 {
 355                     a = *source ++ ;
 356                     r = *source ++ ;
 357                     g = *source ++ ;
 358                     b = *source ++ ;
 359
 360                     *dest++ = 0 ;
 361                     *dest++ = r ;
 362                     *dest++ = g ;
 363                     *dest++ = b ;
 364
 365                     if ( mask )
 366                     {
 367                         *maskdest++ = 0xFF - *masksource++ ;
 368                         masksource++ ;
 369                         masksource++ ;
 370                         masksource++ ;
 371                     }
 372                     else if ( hasAlpha )
 373                         *maskdest++ = a ;
 374                     else
 375                         *maskdest++ = 0xFF ;
 376                 }
 377             }
 378
 379             OSStatus err = SetIconFamilyData( iconFamily, dataType , data ) ;
 380             wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 381
 382             err = SetIconFamilyData( iconFamily, maskType , maskdata ) ;
 383             wxASSERT_MSG( err == noErr , wxT("Error when adding mask") ) ;
 384
 385             HUnlock( data ) ;
 386             HUnlock( maskdata ) ;
 387             DisposeHandle( data ) ;
 388             DisposeHandle( maskdata ) ;
 389         }
 390         else
 391         {
 392             PicHandle pic = GetPictHandle() ;
 393             SetIconFamilyData( iconFamily, 'PICT' , (Handle) pic ) ;
 394         }
 395
 396         // transform into IconRef
 397
 398         static int iconCounter = 2 ;
 399
 400         OSStatus err = RegisterIconRefFromIconFamily( 'WXNG' , (OSType) iconCounter, iconFamily, &m_iconRef ) ;
 401         wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 402
 403         // we have to retain a reference, as Unregister will decrement it
 404         AcquireIconRef( m_iconRef ) ;
 405         UnregisterIconRef( 'WXNG' , (OSType) iconCounter ) ;
 406         DisposeHandle( (Handle) iconFamily ) ;
 407         ++iconCounter ;
 408     }
 409
 410     return m_iconRef ;
 411 }
 412
 413 PicHandle wxBitmapRefData::GetPictHandle()
 414 {
 415     if ( m_pictHandle == NULL )
 416     {
 417         CGrafPtr origPort = NULL ;
 418         GDHandle origDev = NULL ;
 419         GWorldPtr wp = NULL ;
 420         GWorldPtr mask = NULL ;
 421         int height = GetHeight() ;
 422         int width = GetWidth() ;
 423
 424         Rect rect = { 0 , 0 , height , width } ;
 425         RgnHandle clipRgn = NULL ;
 426
 427         GetGWorld( &origPort , &origDev ) ;
 428         wp = GetHBITMAP( &mask ) ;
 429
 430         if ( mask )
 431         {
 432             GWorldPtr monoworld ;
 433             clipRgn = NewRgn() ;
 434             OSStatus err = NewGWorld( &monoworld , 1 , &rect , NULL , NULL , 0 ) ;
 435             verify_noerr(err) ;
 436             LockPixels( GetGWorldPixMap( monoworld ) ) ;
 437             LockPixels( GetGWorldPixMap( mask ) ) ;
 438             SetGWorld( monoworld , NULL ) ;
 439
 440             RGBColor white = { 0xffff , 0xffff , 0xffff } ;
 441             RGBColor black = { 0x0000 , 0x0000 , 0x0000 } ;
 442             RGBForeColor( &black ) ;
 443             RGBBackColor( &white ) ;
 444
 445             CopyBits(GetPortBitMapForCopyBits(mask),
 446                     GetPortBitMapForCopyBits(monoworld),
 447                     &rect,
 448                     &rect,
 449                     srcCopy, NULL);
 450             BitMapToRegion( clipRgn , (BitMap*) *GetGWorldPixMap( monoworld ) ) ;
 451
 452             UnlockPixels( GetGWorldPixMap( monoworld ) ) ;
 453             UnlockPixels( GetGWorldPixMap( mask ) ) ;
 454             DisposeGWorld( monoworld ) ;
 455         }
 456
 457         SetGWorld( wp , NULL ) ;
 458         Rect portRect ;
 459         GetPortBounds( wp , &portRect ) ;
 460         m_pictHandle = OpenPicture(&portRect);
 461
 462         if (m_pictHandle)
 463         {
 464             RGBColor white = { 0xffff , 0xffff , 0xffff } ;
 465             RGBColor black = { 0x0000 , 0x0000 , 0x0000 } ;
 466
 467             RGBForeColor( &black ) ;
 468             RGBBackColor( &white ) ;
 469
 470             if ( clipRgn )
 471                 SetClip( clipRgn ) ;
 472
 473             LockPixels( GetGWorldPixMap( wp ) ) ;
 474             CopyBits(GetPortBitMapForCopyBits(wp),
 475                     GetPortBitMapForCopyBits(wp),
 476                     &portRect,
 477                     &portRect,
 478                     srcCopy,clipRgn);
 479             UnlockPixels( GetGWorldPixMap( wp ) ) ;
 480             ClosePicture();
 481         }
 482
 483         SetGWorld( origPort , origDev ) ;
 484         if ( clipRgn )
 485             DisposeRgn( clipRgn ) ;
 486     }
 487
 488     return m_pictHandle ;
 489 }
 490
 491 #ifdef __WXMAC_OSX__
 492 void wxMacMemoryBufferReleaseProc(void *info, const void *data, size_t size)
 493 {
 494     wxMemoryBuffer* membuf = (wxMemoryBuffer*) info ;
 495
 496     wxASSERT( data == membuf->GetData() ) ;
 497
 498     delete membuf ;
 499 }
 500
 501 CGImageRef wxBitmapRefData::CGImageCreate() const
 502 {
 503     wxASSERT( m_ok ) ;
 504     wxASSERT( m_rawAccessCount >= 0 ) ;
 505     CGImageRef image ;
 506     if ( m_rawAccessCount > 0 || m_cgImageRef == NULL )
 507     {
 508         size_t imageSize = m_width * m_height * 4 ;
 509         void * dataBuffer = m_memBuf.GetData() ;
 510         int w = m_width ;
 511         int h = m_height ;
 512         CGImageAlphaInfo alphaInfo = kCGImageAlphaNoneSkipFirst ;
 513         wxMemoryBuffer* membuf = NULL ;
 514
 515         if ( m_bitmapMask )
 516         {
 517             alphaInfo = kCGImageAlphaFirst ;
 518             membuf = new wxMemoryBuffer( imageSize ) ;
 519             memcpy( membuf->GetData() , dataBuffer , imageSize ) ;
 520             unsigned char *sourcemaskstart = (unsigned char *) m_bitmapMask->GetRawAccess() ;
 521             int maskrowbytes = m_bitmapMask->GetBytesPerRow() ;
 522             unsigned char *destalpha = (unsigned char *) membuf->GetData() ;
 523             for ( int y = 0 ; y < h ; ++y , sourcemaskstart += maskrowbytes)
 524             {
 525                 unsigned char *sourcemask = sourcemaskstart ;
 526                 for ( int x = 0 ; x < w ; ++x , sourcemask += 4 , destalpha += 4 )
 527                 {
 528                     *destalpha = 0xFF - *sourcemask ;
 529                 }
 530             }
 531         }
 532         else
 533         {
 534             if ( m_hasAlpha )
 535             {
 536 #if wxMAC_USE_PREMULTIPLIED_ALPHA
 537                 alphaInfo = kCGImageAlphaPremultipliedFirst ;
 538 #else
 539                 alphaInfo = kCGImageAlphaFirst ;
 540 #endif
 541             }
 542
 543             membuf = new wxMemoryBuffer( m_memBuf ) ;
 544         }
 545
 546         CGColorSpaceRef colorSpace = wxMacGetGenericRGBColorSpace();
 547         CGDataProviderRef dataProvider =
 548             CGDataProviderCreateWithData(
 549                 membuf , (const void *)membuf->GetData() , imageSize,
 550                 wxMacMemoryBufferReleaseProc );
 551         image =
 552             ::CGImageCreate(
 553                 w, h, 8 , 32 , 4 * m_width , colorSpace, alphaInfo ,
 554                 dataProvider, NULL , false , kCGRenderingIntentDefault );
 555         CGDataProviderRelease( dataProvider);
 556     }
 557     else
 558     {
 559         image = m_cgImageRef ;
 560         CGImageRetain( image ) ;
 561     }
 562
 563     if ( m_rawAccessCount == 0 && m_cgImageRef == NULL)
 564     {
 565         // we keep it for later use
 566         m_cgImageRef = image ;
 567         CGImageRetain( image ) ;
 568     }
 569
 570     return image ;
 571 }
 572 #endif
 573
 574 GWorldPtr wxBitmapRefData::GetHBITMAP(GWorldPtr* mask) const
 575 {
 576     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 577     if ( mask )
 578     {
 579         *mask = NULL ;
 580         if ( m_bitmapMask )
 581         {
 582             *mask = (GWorldPtr) m_bitmapMask->GetHBITMAP() ;
 583         }
 584         else if ( m_hasAlpha )
 585         {
 586 #if !wxMAC_USE_CORE_GRAPHICS
 587             if ( m_rawAccessCount > 0 )
 588                 UpdateAlphaMask() ;
 589 #else
 590             // this structure is not kept in synch when using CG, so if something
 591             // is really accessing the GrafPorts, we have to sync it
 592             UpdateAlphaMask() ;
 593 #endif
 594
 595             *mask = m_hMaskBitmap ;
 596         }
 597     }
 598
 599     return m_hBitmap ;
 600 }
 601
 602 void wxBitmapRefData::UpdateAlphaMask() const
 603 {
 604     if ( m_hasAlpha )
 605     {
 606         unsigned char *sourcemask = (unsigned char *) GetRawAccess() ;
 607         unsigned char *destalphabase = (unsigned char *) m_maskMemBuf.GetData() ;
 608
 609         int h = GetHeight() ;
 610         int w = GetWidth() ;
 611
 612         for ( int y = 0 ; y < h ; ++y , destalphabase += m_maskBytesPerRow )
 613         {
 614             unsigned char* destalpha = destalphabase ;
 615
 616             for ( int x = 0 ; x < w ; ++x , sourcemask += 4 )
 617             {
 618                 // we must have 24 bit depth for non quartz smooth alpha
 619                 *destalpha++ = 255 ;
 620                 *destalpha++ = 255  - *sourcemask ;
 621                 *destalpha++ = 255  - *sourcemask ;
 622                 *destalpha++ = 255  - *sourcemask ;
 623             }
 624         }
 625     }
 626 }
 627
 628 void wxBitmapRefData::Free()
 629 {
 630     wxASSERT_MSG( m_rawAccessCount == 0 , wxT("Bitmap still selected when destroyed") ) ;
 631
 632 #ifdef __WXMAC_OSX__
 633     if ( m_cgImageRef )
 634     {
 635         CGImageRelease( m_cgImageRef ) ;
 636         m_cgImageRef = NULL ;
 637     }
 638 #endif
 639
 640     if ( m_iconRef )
 641     {
 642         ReleaseIconRef( m_iconRef ) ;
 643         m_iconRef = NULL ;
 644     }
 645
 646     if ( m_pictHandle )
 647     {
 648         KillPicture( m_pictHandle ) ;
 649         m_pictHandle = NULL ;
 650     }
 651
 652     if ( m_hBitmap )
 653     {
 654         DisposeGWorld( MAC_WXHBITMAP(m_hBitmap) ) ;
 655         m_hBitmap = NULL ;
 656     }
 657
 658     if ( m_hMaskBitmap )
 659     {
 660         DisposeGWorld( MAC_WXHBITMAP(m_hMaskBitmap) ) ;
 661         m_hMaskBitmap = NULL ;
 662     }
 663
 664     if (m_bitmapMask)
 665     {
 666         delete m_bitmapMask;
 667         m_bitmapMask = NULL;
 668     }
 669 }
 670
 671 wxBitmapRefData::~wxBitmapRefData()
 672 {
 673     Free() ;
 674 }
 675
 676 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 677 {
 678     bool created = false ;
 679     int w = icon.GetWidth() ;
 680     int h = icon.GetHeight() ;
 681
 682     Create( icon.GetWidth() , icon.GetHeight() ) ;
 683
 684     if ( w == h && ( w == 16 || w == 32 || w == 48 || w == 128 ) )
 685     {
 686         IconFamilyHandle iconFamily = NULL ;
 687         Handle imagehandle = NewHandle( 0 ) ;
 688         Handle maskhandle = NewHandle( 0 ) ;
 689
 690         OSType maskType = 0;
 691         OSType dataType = 0;
 692         IconSelectorValue selector = 0 ;
 693
 694         switch (w)
 695         {
 696             case 128:
 697                 dataType = kThumbnail32BitData ;
 698                 maskType = kThumbnail8BitMask ;
 699                 selector = kSelectorAllAvailableData ;
 700                 break;
 701
 702             case 48:
 703                 dataType = kHuge32BitData ;
 704                 maskType = kHuge8BitMask ;
 705                 selector = kSelectorHuge32Bit | kSelectorHuge8BitMask ;
 706                 break;
 707
 708             case 32:
 709                 dataType = kLarge32BitData ;
 710                 maskType = kLarge8BitMask ;
 711                 selector = kSelectorLarge32Bit | kSelectorLarge8BitMask ;
 712                 break;
 713
 714             case 16:
 715                 dataType = kSmall32BitData ;
 716                 maskType = kSmall8BitMask ;
 717                 selector = kSelectorSmall32Bit | kSelectorSmall8BitMask ;
 718                 break;
 719
 720             default:
 721                 break;
 722         }
 723
 724         OSStatus err = IconRefToIconFamily( MAC_WXHICON(icon.GetHICON()) , selector , &iconFamily ) ;
 725
 726         err = GetIconFamilyData( iconFamily , dataType , imagehandle ) ;
 727         err = GetIconFamilyData( iconFamily , maskType , maskhandle ) ;
 728         size_t imagehandlesize = GetHandleSize( imagehandle ) ;
 729         size_t maskhandlesize = GetHandleSize( maskhandle ) ;
 730
 731         if ( imagehandlesize != 0 && maskhandlesize != 0 )
 732         {
 733             wxASSERT( GetHandleSize( imagehandle ) == w * 4 * h ) ;
 734             wxASSERT( GetHandleSize( maskhandle ) == w * h ) ;
 735
 736             UseAlpha() ;
 737
 738             unsigned char *source = (unsigned char *) *imagehandle ;
 739             unsigned char *sourcemask = (unsigned char *) *maskhandle ;
 740             unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 741
 742             for ( int y = 0 ; y < h ; ++y )
 743             {
 744                 for ( int x = 0 ; x < w ; ++x )
 745                 {
 746                     *destination++ = *sourcemask++ ;
 747                     source++ ;
 748                     *destination++ = *source++ ;
 749                     *destination++ = *source++ ;
 750                     *destination++ = *source++ ;
 751                 }
 752             }
 753
 754             EndRawAccess() ;
 755             DisposeHandle( imagehandle ) ;
 756             DisposeHandle( maskhandle ) ;
 757             created = true ;
 758         }
 759
 760         DisposeHandle( (Handle) iconFamily ) ;
 761     }
 762
 763     if ( !created )
 764     {
 765         wxMemoryDC dc ;
 766         dc.SelectObject( *this ) ;
 767         dc.DrawIcon( icon , 0 , 0 ) ;
 768         dc.SelectObject( wxNullBitmap ) ;
 769     }
 770
 771     return true;
 772 }
 773
 774 wxBitmap::wxBitmap()
 775 {
 776 }
 777
 778 wxBitmap::~wxBitmap()
 779 {
 780 }
 781
 782 wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
 783 {
 784     m_refData = new wxBitmapRefData( the_width , the_height , no_bits ) ;
 785
 786     if ( no_bits == 1 )
 787     {
 788         int linesize = ( the_width / (sizeof(unsigned char) * 8)) ;
 789         if ( the_width % (sizeof(unsigned char) * 8) )
 790             linesize += sizeof(unsigned char);
 791
 792         unsigned char* linestart = (unsigned char*) bits ;
 793         unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 794
 795         for ( int y = 0 ; y < the_height ; ++y , linestart += linesize )
 796         {
 797             int index, bit, mask;
 798
 799             for ( int x = 0 ; x < the_width ; ++x )
 800             {
 801                 index = x / 8 ;
 802                 bit = x % 8 ;
 803                 mask = 1 << bit ;
 804
 805                 if ( !(linestart[index] & mask ) )
 806                 {
 807                     *destination++ = 0xFF ;
 808                     *destination++ = 0 ;
 809                     *destination++ = 0 ;
 810                     *destination++ = 0 ;
 811                 }
 812                 else
 813                 {
 814                     *destination++ = 0xFF ;
 815                     *destination++ = 0xFF ;
 816                     *destination++ = 0xFF ;
 817                     *destination++ = 0xFF ;
 818                 }
 819             }
 820         }
 821
 822         EndRawAccess() ;
 823     }
 824     else
 825     {
 826         wxFAIL_MSG(wxT("multicolor BITMAPs not yet implemented"));
 827     }
 828 }
 829
 830 wxBitmap::wxBitmap(int w, int h, int d)
 831 {
 832     (void)Create(w, h, d);
 833 }
 834
 835 wxBitmap::wxBitmap(void *data, wxBitmapType type, int width, int height, int depth)
 836 {
 837     (void) Create(data, type, width, height, depth);
 838 }
 839
 840 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
 841 {
 842     LoadFile(filename, type);
 843 }
 844
 845 wxBitmap::wxBitmap(const char **bits)
 846 {
 847     (void) CreateFromXpm(bits);
 848 }
 849
 850 wxBitmap::wxBitmap(char **bits)
 851 {
 852     (void) CreateFromXpm((const char **)bits);
 853 }
 854
 855 void * wxBitmap::GetRawAccess() const
 856 {
 857     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 858
 859     return M_BITMAPDATA->GetRawAccess() ;
 860 }
 861
 862 void * wxBitmap::BeginRawAccess()
 863 {
 864     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 865
 866     return M_BITMAPDATA->BeginRawAccess() ;
 867 }
 868
 869 void wxBitmap::EndRawAccess()
 870 {
 871     wxCHECK_RET( Ok() , wxT("invalid bitmap") ) ;
 872
 873     M_BITMAPDATA->EndRawAccess() ;
 874 }
 875
 876 bool wxBitmap::CreateFromXpm(const char **bits)
 877 {
 878 #if wxUSE_IMAGE
 879     wxCHECK_MSG( bits != NULL, false, wxT("invalid bitmap data") )
 880
 881     wxXPMDecoder decoder;
 882     wxImage img = decoder.ReadData(bits);
 883     wxCHECK_MSG( img.Ok(), false, wxT("invalid bitmap data") )
 884
 885     *this = wxBitmap(img);
 886
 887     return true;
 888 #else
 889
 890     return false;
 891 #endif
 892 }
 893
 894 #ifdef __WXMAC_OSX__
 895 WXCGIMAGEREF wxBitmap::CGImageCreate() const
 896 {
 897     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
 898
 899     return M_BITMAPDATA->CGImageCreate() ;
 900 }
 901 #endif
 902
 903 wxBitmap wxBitmap::GetSubBitmap(const wxRect &rect) const
 904 {
 905     wxCHECK_MSG( Ok() &&
 906                 (rect.x >= 0) && (rect.y >= 0) &&
 907                 (rect.x+rect.width <= GetWidth()) &&
 908                 (rect.y+rect.height <= GetHeight()),
 909                 wxNullBitmap, wxT("invalid bitmap or bitmap region") );
 910
 911     wxBitmap ret( rect.width, rect.height, GetDepth() );
 912     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 913
 914     int sourcewidth = GetWidth() ;
 915     int destwidth = rect.width ;
 916     int destheight = rect.height ;
 917
 918     {
 919         unsigned char *sourcedata = (unsigned char*) GetRawAccess() ;
 920         unsigned char *destdata = (unsigned char*) ret.BeginRawAccess() ;
 921         wxASSERT( (sourcedata != NULL) && (destdata != NULL) ) ;
 922
 923         int sourcelinesize = sourcewidth * 4 ;
 924         int destlinesize = destwidth * 4 ;
 925         unsigned char *source = sourcedata + rect.x * 4 + rect.y * sourcelinesize ;
 926         unsigned char *dest = destdata ;
 927
 928         for (int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
 929         {
 930             memcpy( dest , source , destlinesize ) ;
 931         }
 932     }
 933
 934     ret.EndRawAccess() ;
 935
 936     if ( M_BITMAPDATA->m_bitmapMask )
 937     {
 938         wxMemoryBuffer maskbuf ;
 939         int rowBytes = ( destwidth * 4 + 3 ) & 0xFFFFFFC ;
 940         size_t maskbufsize = rowBytes * destheight ;
 941
 942         int sourcelinesize = M_BITMAPDATA->m_bitmapMask->GetBytesPerRow() ;
 943         int destlinesize = rowBytes ;
 944
 945         unsigned char *source = (unsigned char *) M_BITMAPDATA->m_bitmapMask->GetRawAccess() ;
 946         unsigned char *destdata = (unsigned char * ) maskbuf.GetWriteBuf( maskbufsize ) ;
 947         wxASSERT( (source != NULL) && (destdata != NULL) ) ;
 948
 949         source += rect.x * 4 + rect.y * sourcelinesize ;
 950         unsigned char *dest = destdata ;
 951
 952         for (int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
 953         {
 954             memcpy( dest , source , destlinesize ) ;
 955         }
 956
 957         maskbuf.UngetWriteBuf( maskbufsize ) ;
 958         ret.SetMask( new wxMask( maskbuf , destwidth , destheight , rowBytes ) ) ;
 959     }
 960     else if ( HasAlpha() )
 961         ret.UseAlpha() ;
 962
 963     return ret;
 964 }
 965
 966 bool wxBitmap::Create(int w, int h, int d)
 967 {
 968     UnRef();
 969
 970     if ( d < 0 )
 971         d = wxDisplayDepth() ;
 972
 973     m_refData = new wxBitmapRefData( w , h , d );
 974
 975     return M_BITMAPDATA->Ok() ;
 976 }
 977
 978 bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
 979 {
 980     UnRef();
 981
 982     wxBitmapHandler *handler = FindHandler(type);
 983
 984     if ( handler )
 985     {
 986         m_refData = new wxBitmapRefData;
 987
 988         return handler->LoadFile(this, filename, type, -1, -1);
 989     }
 990     else
 991     {
 992 #if wxUSE_IMAGE
 993         wxImage loadimage(filename, type);
 994         if (loadimage.Ok())
 995         {
 996             *this = loadimage;
 997
 998             return true;
 999         }
1000 #endif
1001     }
1002
1003     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1004
1005     return false;
1006 }
1007
1008 bool wxBitmap::Create(void *data, wxBitmapType type, int width, int height, int depth)
1009 {
1010     UnRef();
1011
1012     m_refData = new wxBitmapRefData;
1013
1014     wxBitmapHandler *handler = FindHandler(type);
1015
1016     if ( handler == NULL )
1017     {
1018         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1019
1020         return false;
1021     }
1022
1023     return handler->Create(this, data, type, width, height, depth);
1024 }
1025
1026 #if wxUSE_IMAGE
1027
1028 wxBitmap::wxBitmap(const wxImage& image, int depth)
1029 {
1030     wxCHECK_RET( image.Ok(), wxT("invalid image") )
1031
1032     // width and height of the device-dependent bitmap
1033     int width = image.GetWidth();
1034     int height = image.GetHeight();
1035
1036     m_refData = new wxBitmapRefData( width , height , depth ) ;
1037
1038     // Create picture
1039
1040     bool hasAlpha = false ;
1041
1042     if ( image.HasMask() )
1043     {
1044         // takes precedence, don't mix with alpha info
1045     }
1046     else
1047     {
1048         hasAlpha = image.HasAlpha() ;
1049     }
1050
1051     if ( hasAlpha )
1052         UseAlpha() ;
1053
1054     unsigned char* destination = (unsigned char*) BeginRawAccess() ;
1055     register unsigned char* data = image.GetData();
1056     const unsigned char *alpha = hasAlpha ? image.GetAlpha() : NULL ;
1057
1058     for (int y = 0; y < height; y++)
1059     {
1060         for (int x = 0; x < width; x++)
1061         {
1062             if ( hasAlpha )
1063             {
1064                 const unsigned char a = *alpha++;
1065                 *destination++ = a ;
1066
1067 #if wxMAC_USE_PREMULTIPLIED_ALPHA
1068                 *destination++ = ((*data++) * a + 127) / 255 ;
1069                 *destination++ = ((*data++) * a + 127) / 255 ;
1070                 *destination++ = ((*data++) * a + 127) / 255 ;
1071 #else
1072                 *destination++ = *data++ ;
1073                 *destination++ = *data++ ;
1074                 *destination++ = *data++ ;
1075 #endif
1076             }
1077             else
1078             {
1079                 *destination++ = 0xFF ;
1080                 *destination++ = *data++ ;
1081                 *destination++ = *data++ ;
1082                 *destination++ = *data++ ;
1083             }
1084         }
1085     }
1086
1087     EndRawAccess() ;
1088     if ( image.HasMask() )
1089         SetMask( new wxMask( *this , wxColour( image.GetMaskRed() , image.GetMaskGreen() , image.GetMaskBlue() ) ) ) ;
1090 }
1091
1092 wxImage wxBitmap::ConvertToImage() const
1093 {
1094     wxImage image;
1095
1096     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
1097
1098     // create an wxImage object
1099     int width = GetWidth();
1100     int height = GetHeight();
1101     image.Create( width, height );
1102
1103     unsigned char *data = image.GetData();
1104     wxCHECK_MSG( data, wxNullImage, wxT("Could not allocate data for image") );
1105
1106     unsigned char* source = (unsigned char*) GetRawAccess() ;
1107
1108     bool hasAlpha = false ;
1109     bool hasMask = false ;
1110     int maskBytesPerRow = 0 ;
1111     unsigned char *alpha = NULL ;
1112     unsigned char *mask = NULL ;
1113
1114     if ( HasAlpha() )
1115         hasAlpha = true ;
1116
1117     if ( GetMask() )
1118     {
1119         hasMask = true ;
1120         mask = (unsigned char*) GetMask()->GetRawAccess() ;
1121         maskBytesPerRow = GetMask()->GetBytesPerRow() ;
1122     }
1123
1124     if ( hasAlpha )
1125     {
1126         image.SetAlpha() ;
1127         alpha = image.GetAlpha() ;
1128     }
1129
1130     int index = 0;
1131
1132     // The following masking algorithm is the same as well in msw/gtk:
1133     // the colour used as transparent one in wxImage and the one it is
1134     // replaced with when it actually occurs in the bitmap
1135     static const int MASK_RED = 1;
1136     static const int MASK_GREEN = 2;
1137     static const int MASK_BLUE = 3;
1138     static const int MASK_BLUE_REPLACEMENT = 2;
1139
1140     for (int yy = 0; yy < height; yy++ , mask += maskBytesPerRow )
1141     {
1142         unsigned char * maskp = mask ;
1143         unsigned char a, r, g, b;
1144         long color;
1145
1146         for (int xx = 0; xx < width; xx++)
1147         {
1148             color = *((long*) source) ;
1149             a = ((color&0xFF000000) >> 24) ;
1150             r = ((color&0x00FF0000) >> 16) ;
1151             g = ((color&0x0000FF00) >> 8) ;
1152             b = (color&0x000000FF);
1153
1154             if ( hasMask )
1155             {
1156                 if ( *maskp++ == 0xFF )
1157                 {
1158                     r = MASK_RED ;
1159                     g = MASK_GREEN ;
1160                     b = MASK_BLUE ;
1161                 }
1162                 else if ( r == MASK_RED && g == MASK_GREEN && b == MASK_BLUE )
1163                     b = MASK_BLUE_REPLACEMENT ;
1164
1165                 maskp++ ;
1166                 maskp++ ;
1167                 maskp++ ;
1168             }
1169             else if ( hasAlpha )
1170                 *alpha++ = a ;
1171
1172             data[index    ] = r ;
1173             data[index + 1] = g ;
1174             data[index + 2] = b ;
1175
1176             index += 3;
1177             source += 4 ;
1178         }
1179     }
1180
1181     if ( hasMask )
1182         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1183
1184     return image;
1185 }
1186
1187 #endif //wxUSE_IMAGE
1188
1189 bool wxBitmap::SaveFile( const wxString& filename,
1190     wxBitmapType type, const wxPalette *palette ) const
1191 {
1192     bool success = false;
1193     wxBitmapHandler *handler = FindHandler(type);
1194
1195     if ( handler )
1196     {
1197         success = handler->SaveFile(this, filename, type, palette);
1198     }
1199     else
1200     {
1201 #if wxUSE_IMAGE
1202         wxImage image = ConvertToImage();
1203         success = image.SaveFile(filename, type);
1204 #else
1205         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1206 #endif
1207     }
1208
1209     return success;
1210 }
1211
1212 bool wxBitmap::Ok() const
1213 {
1214    return (M_BITMAPDATA && M_BITMAPDATA->Ok());
1215 }
1216
1217 int wxBitmap::GetHeight() const
1218 {
1219    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1220
1221    return M_BITMAPDATA->GetHeight();
1222 }
1223
1224 int wxBitmap::GetWidth() const
1225 {
1226    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1227
1228    return M_BITMAPDATA->GetWidth() ;
1229 }
1230
1231 int wxBitmap::GetDepth() const
1232 {
1233    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1234
1235    return M_BITMAPDATA->GetDepth();
1236 }
1237
1238 #if WXWIN_COMPATIBILITY_2_4
1239 int wxBitmap::GetQuality() const
1240 {
1241     return 0;
1242 }
1243
1244 void wxBitmap::SetQuality(int WXUNUSED(quality))
1245 {
1246 }
1247 #endif
1248
1249 wxMask *wxBitmap::GetMask() const
1250 {
1251    wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1252
1253    return M_BITMAPDATA->m_bitmapMask;
1254 }
1255
1256 bool wxBitmap::HasAlpha() const
1257 {
1258    wxCHECK_MSG( Ok(), false , wxT("invalid bitmap") );
1259
1260    return M_BITMAPDATA->HasAlpha() ;
1261 }
1262
1263 void wxBitmap::SetWidth(int w)
1264 {
1265     if (!M_BITMAPDATA)
1266         m_refData = new wxBitmapRefData;
1267
1268     M_BITMAPDATA->SetWidth(w);
1269 }
1270
1271 void wxBitmap::SetHeight(int h)
1272 {
1273     if (!M_BITMAPDATA)
1274         m_refData = new wxBitmapRefData;
1275
1276     M_BITMAPDATA->SetHeight(h);
1277 }
1278
1279 void wxBitmap::SetDepth(int d)
1280 {
1281     if (!M_BITMAPDATA)
1282         m_refData = new wxBitmapRefData;
1283
1284     M_BITMAPDATA->SetDepth(d);
1285 }
1286
1287 void wxBitmap::SetOk(bool isOk)
1288 {
1289     if (!M_BITMAPDATA)
1290         m_refData = new wxBitmapRefData;
1291
1292     M_BITMAPDATA->SetOk(isOk);
1293 }
1294
1295 #if wxUSE_PALETTE
1296 wxPalette *wxBitmap::GetPalette() const
1297 {
1298    wxCHECK_MSG( Ok(), NULL, wxT("Invalid bitmap  GetPalette()") );
1299
1300    return &M_BITMAPDATA->m_bitmapPalette;
1301 }
1302
1303 void wxBitmap::SetPalette(const wxPalette& palette)
1304 {
1305     if (!M_BITMAPDATA)
1306         m_refData = new wxBitmapRefData;
1307
1308     M_BITMAPDATA->m_bitmapPalette = palette ;
1309 }
1310 #endif // wxUSE_PALETTE
1311
1312 void wxBitmap::SetMask(wxMask *mask)
1313 {
1314     if (!M_BITMAPDATA)
1315         m_refData = new wxBitmapRefData;
1316
1317     // Remove existing mask if there is one.
1318     delete M_BITMAPDATA->m_bitmapMask;
1319
1320     M_BITMAPDATA->m_bitmapMask = mask ;
1321 }
1322
1323 WXHBITMAP wxBitmap::GetHBITMAP(WXHBITMAP* mask) const
1324 {
1325     return WXHBITMAP(M_BITMAPDATA->GetHBITMAP((GWorldPtr*)mask));
1326 }
1327
1328 // ----------------------------------------------------------------------------
1329 // wxMask
1330 // ----------------------------------------------------------------------------
1331
1332 wxMask::wxMask()
1333 {
1334     Init() ;
1335 }
1336
1337 // Construct a mask from a bitmap and a colour indicating
1338 // the transparent area
1339 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
1340 {
1341     Init() ;
1342     Create( bitmap, colour );
1343 }
1344
1345 // Construct a mask from a mono bitmap (copies the bitmap).
1346 wxMask::wxMask( const wxBitmap& bitmap )
1347 {
1348     Init() ;
1349     Create( bitmap );
1350 }
1351
1352 // Construct a mask from a mono bitmap (copies the bitmap).
1353
1354 wxMask::wxMask( const wxMemoryBuffer& data, int width , int height , int bytesPerRow )
1355 {
1356     Init() ;
1357     Create( data, width , height , bytesPerRow );
1358 }
1359
1360 wxMask::~wxMask()
1361 {
1362     if ( m_maskBitmap )
1363     {
1364         DisposeGWorld( (GWorldPtr)m_maskBitmap ) ;
1365         m_maskBitmap = NULL ;
1366     }
1367 }
1368
1369 void wxMask::Init()
1370 {
1371     m_width = m_height = m_bytesPerRow = 0 ;
1372     m_maskBitmap = NULL ;
1373 }
1374
1375 void *wxMask::GetRawAccess() const
1376 {
1377     return m_memBuf.GetData() ;
1378 }
1379
1380 // The default ColorTable for k8IndexedGrayPixelFormat in Intel appears to be broken, so we'll use an non-indexed
1381 // bitmap mask instead; in order to keep the code simple, the change applies to PowerPC implementations as well
1382
1383 void wxMask::RealizeNative()
1384 {
1385     if ( m_maskBitmap )
1386     {
1387        DisposeGWorld( (GWorldPtr)m_maskBitmap ) ;
1388        m_maskBitmap = NULL ;
1389     }
1390
1391     Rect rect = { 0 , 0 , m_height , m_width } ;
1392
1393     OSStatus err = NewGWorldFromPtr(
1394         (GWorldPtr*) &m_maskBitmap , k32ARGBPixelFormat , &rect , NULL , NULL , 0 ,
1395         (char*) m_memBuf.GetData() , m_bytesPerRow ) ;
1396     verify_noerr( err ) ;
1397 }
1398
1399 // Create a mask from a mono bitmap (copies the bitmap).
1400
1401 bool wxMask::Create(const wxMemoryBuffer& data,int width , int height , int bytesPerRow)
1402 {
1403     m_memBuf = data ;
1404     m_width = width ;
1405     m_height = height ;
1406     m_bytesPerRow = bytesPerRow ;
1407
1408     wxASSERT( data.GetDataLen() == (size_t)(height * bytesPerRow) ) ;
1409
1410     RealizeNative() ;
1411
1412     return true ;
1413 }
1414
1415 // Create a mask from a mono bitmap (copies the bitmap).
1416 bool wxMask::Create(const wxBitmap& bitmap)
1417 {
1418     m_width = bitmap.GetWidth() ;
1419     m_height = bitmap.GetHeight() ;
1420     m_bytesPerRow = ( m_width * 4 + 3 ) & 0xFFFFFFC ;
1421
1422     size_t size = m_bytesPerRow * m_height ;
1423     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1424     wxASSERT( destdatabase != NULL ) ;
1425
1426     memset( destdatabase , 0 , size ) ;
1427     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1428
1429     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow )
1430     {
1431         unsigned char *destdata = destdatabase ;
1432         unsigned char r, g, b;
1433
1434         for ( int x = 0 ; x < m_width ; ++x )
1435         {
1436             srcdata++ ;
1437             r = *srcdata++ ;
1438             g = *srcdata++ ;
1439             b = *srcdata++ ;
1440
1441             if ( ( r + g + b ) > 0x10 )
1442             {
1443                 *destdata++ = 0xFF ;
1444                 *destdata++ = 0xFF ;
1445                 *destdata++ = 0xFF ;
1446                 *destdata++ = 0xFF ;
1447             }
1448             else
1449             {
1450                 *destdata++ = 0x00 ;
1451                 *destdata++ = 0x00 ;
1452                 *destdata++ = 0x00 ;
1453                 *destdata++ = 0x00 ;
1454             }
1455         }
1456     }
1457
1458     m_memBuf.UngetWriteBuf( size ) ;
1459     RealizeNative() ;
1460
1461     return true;
1462 }
1463
1464 // Create a mask from a bitmap and a colour indicating
1465 // the transparent area
1466 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1467 {
1468     m_width = bitmap.GetWidth() ;
1469     m_height = bitmap.GetHeight() ;
1470     m_bytesPerRow = ( m_width * 4 + 3 ) & 0xFFFFFFC ;
1471
1472     size_t size = m_bytesPerRow * m_height ;
1473     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1474     wxASSERT( destdatabase != NULL ) ;
1475
1476     memset( destdatabase , 0 , size ) ;
1477     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1478
1479     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow)
1480     {
1481         unsigned char *destdata = destdatabase ;
1482         unsigned char r, g, b;
1483
1484         for ( int x = 0 ; x < m_width ; ++x )
1485         {
1486             srcdata++ ;
1487             r = *srcdata++ ;
1488             g = *srcdata++ ;
1489             b = *srcdata++ ;
1490
1491             if ( colour == wxColour( r , g , b ) )
1492             {
1493                 *destdata++ = 0xFF ;
1494                 *destdata++ = 0xFF ;
1495                 *destdata++ = 0xFF ;
1496                 *destdata++ = 0xFF ;
1497             }
1498             else
1499             {
1500                 *destdata++ = 0x00 ;
1501                 *destdata++ = 0x00 ;
1502                 *destdata++ = 0x00 ;
1503                 *destdata++ = 0x00 ;
1504             }
1505         }
1506     }
1507
1508     m_memBuf.UngetWriteBuf( size ) ;
1509     RealizeNative() ;
1510
1511     return true;
1512 }
1513
1514 WXHBITMAP wxMask::GetHBITMAP() const
1515 {
1516     return m_maskBitmap ;
1517 }
1518
1519 // ----------------------------------------------------------------------------
1520 // wxBitmapHandler
1521 // ----------------------------------------------------------------------------
1522
1523 wxBitmapHandler::~wxBitmapHandler()
1524 {
1525 }
1526
1527 bool wxBitmapHandler::Create(wxBitmap *bitmap, void *data, long type, int width, int height, int depth)
1528 {
1529     return false;
1530 }
1531
1532 bool wxBitmapHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1533         int desiredWidth, int desiredHeight)
1534 {
1535     return false;
1536 }
1537
1538 bool wxBitmapHandler::SaveFile(const wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette)
1539 {
1540     return false;
1541 }
1542
1543 // ----------------------------------------------------------------------------
1544 // Standard Handlers
1545 // ----------------------------------------------------------------------------
1546
1547 class WXDLLEXPORT wxPICTResourceHandler: public wxBitmapHandler
1548 {
1549     DECLARE_DYNAMIC_CLASS(wxPICTResourceHandler)
1550
1551 public:
1552     inline wxPICTResourceHandler()
1553     {
1554         SetName(wxT("Macintosh Pict resource"));
1555         SetExtension(wxEmptyString);
1556         SetType(wxBITMAP_TYPE_PICT_RESOURCE);
1557     };
1558
1559     virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1560           int desiredWidth, int desiredHeight);
1561 };
1562
1563 IMPLEMENT_DYNAMIC_CLASS(wxPICTResourceHandler, wxBitmapHandler)
1564
1565
1566 bool wxPICTResourceHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1567           int desiredWidth, int desiredHeight)
1568 {
1569 #if wxUSE_METAFILE
1570     Str255 theName ;
1571     wxMacStringToPascal( name , theName ) ;
1572
1573     PicHandle thePict = (PicHandle ) GetNamedResource( 'PICT' , theName ) ;
1574     if ( thePict )
1575     {
1576         wxMetafile mf ;
1577
1578         mf.SetHMETAFILE( (WXHMETAFILE) thePict ) ;
1579         bitmap->Create( mf.GetWidth() , mf.GetHeight() ) ;
1580         wxMemoryDC dc ;
1581         dc.SelectObject( *bitmap ) ;
1582         mf.Play( &dc ) ;
1583         dc.SelectObject( wxNullBitmap ) ;
1584
1585         return true ;
1586     }
1587 #endif
1588
1589     return false ;
1590 }
1591
1592 void wxBitmap::InitStandardHandlers()
1593 {
1594     AddHandler( new wxPICTResourceHandler ) ;
1595     AddHandler( new wxICONResourceHandler ) ;
1596 }
1597
1598 // ----------------------------------------------------------------------------
1599 // raw bitmap access support
1600 // ----------------------------------------------------------------------------
1601
1602 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1603 {
1604     if ( !Ok() )
1605         // no bitmap, no data (raw or otherwise)
1606         return NULL;
1607
1608     data.m_width = GetWidth() ;
1609     data.m_height = GetHeight() ;
1610     data.m_stride = GetWidth() * 4 ;
1611
1612     return GetRawAccess() ;
1613 }
1614
1615 void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
1616 {
1617     if ( !Ok() )
1618         return;
1619
1620     // TODO: if we have some information about the API we should check
1621     // this code looks strange...
1622
1623     if ( !M_BITMAPDATA->HasAlpha() )
1624         return;
1625
1626     wxAlphaPixelData& data = (wxAlphaPixelData&)dataBase;
1627     int w = data.GetWidth();
1628     int h = data.GetHeight();
1629
1630     wxBitmap bmpMask( GetWidth(), GetHeight(), 32 );
1631     wxAlphaPixelData dataMask( bmpMask, data.GetOrigin(), wxSize( w, h ) );
1632     wxAlphaPixelData::Iterator pMask( dataMask ), p( data );
1633
1634     for ( int y = 0; y < h; y++ )
1635     {
1636         wxAlphaPixelData::Iterator rowStartMask = pMask;
1637         wxAlphaPixelData::Iterator rowStart = p;
1638
1639         for ( int x = 0; x < w; x++ )
1640         {
1641             const wxAlphaPixelData::Iterator::ChannelType alpha = p.Alpha();
1642
1643             pMask.Red() = alpha;
1644             pMask.Green() = alpha;
1645             pMask.Blue() = alpha;
1646
1647             ++p;
1648             ++pMask;
1649         }
1650
1651         p = rowStart;
1652         p.OffsetY( data, 1 );
1653
1654         pMask = rowStartMask;
1655         pMask.OffsetY( dataMask, 1 );
1656     }
1657
1658     SetMask( new wxMask( bmpMask ) );
1659 }
1660
1661 void wxBitmap::UseAlpha()
1662 {
1663     // remember that we are using alpha channel:
1664     // we'll need to create a proper mask in UngetRawData()
1665     M_BITMAPDATA->UseAlpha( true );
1666 }