src/mac/carbon/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        bitmap.cpp
   3 // Purpose:     wxBitmap
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation "bitmap.h"
  14 #endif
  15
  16 #include "wx/wxprec.h"
  17
  18 #include "wx/bitmap.h"
  19 #include "wx/icon.h"
  20 #include "wx/log.h"
  21 #include "wx/image.h"
  22 #include "wx/metafile.h"
  23 #include "wx/xpmdecod.h"
  24
  25 #include "wx/rawbmp.h"
  26
  27 IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
  28 IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
  29 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject )
  30
  31 #ifdef __DARWIN__
  32     #include <ApplicationServices/ApplicationServices.h>
  33 #else
  34     #include <PictUtils.h>
  35 #endif
  36
  37 #include "wx/mac/uma.h"
  38
  39 #include "wx/dcmemory.h"
  40
  41 // Implementation Notes
  42 // --------------------
  43 //
  44 // we are always working with a 32 bit deep pixel buffer
  45 // under QuickDraw its alpha parts are going to be ignored in the GWorld,
  46 // therefore we have a separate GWorld there for blitting the mask in
  47
  48 // under Quartz then content is transformed into a CGImageRef representing the same data
  49 // which can be transferred to the GPU by the OS for fast rendering
  50
  51 // we don't dare premultiplied alpha yet
  52 #define wxMAC_USE_PREMULTIPLIED_ALPHA 0
  53
  54 void wxMacCreateBitmapButton( ControlButtonContentInfo*info , const wxBitmap& bitmap , int forceType )
  55 {
  56     memset( info , 0 , sizeof(ControlButtonContentInfo) ) ;
  57     if ( bitmap.Ok() )
  58     {
  59         wxBitmapRefData * bmap = bitmap.GetBitmapData() ;
  60         if ( bmap == NULL )
  61             return ;
  62
  63         if ( ( bmap->HasNativeSize() && forceType == 0 ) || forceType == kControlContentIconRef )
  64         {
  65             wxBitmap scaleBmp ;
  66
  67             wxBitmapRefData* bmp = bmap ;
  68
  69             if ( !bmap->HasNativeSize() )
  70             {
  71                 // as PICT conversion will only result in a 16x16 icon, let's attempt
  72                 // a few scales for better results
  73
  74                 int w = bitmap.GetWidth() ;
  75                 int h = bitmap.GetHeight() ;
  76                 int sz = wxMax( w , h ) ;
  77                 if ( sz == 24 || sz == 64)
  78                 {
  79                     scaleBmp = wxBitmap( bitmap.ConvertToImage().Scale( w * 2 , h * 2 ) ) ;
  80                     bmp = scaleBmp.GetBitmapData() ;
  81                 }
  82             }
  83
  84             info->contentType = kControlContentIconRef ;
  85             info->u.iconRef = bmp->GetIconRef() ;
  86             AcquireIconRef( info->u.iconRef ) ;
  87         }
  88 #if wxMAC_USE_CORE_GRAPHICS && MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2
  89         else if ( forceType == kControlContentCGImageRef )
  90         {
  91             info->contentType = kControlContentCGImageRef ;
  92             info->u.imageRef = (CGImageRef) bmap->CGImageCreate() ;
  93         }
  94 #endif
  95         else
  96         {
  97             info->contentType = kControlContentPictHandle ;
  98             info->u.picture = bmap->GetPictHandle() ;
  99         }
 100     }
 101 }
 102
 103 void wxMacReleaseBitmapButton( ControlButtonContentInfo*info )
 104 {
 105     if ( info->contentType == kControlContentIconRef )
 106     {
 107         ReleaseIconRef( info->u.iconRef ) ;
 108     }
 109     else if ( info->contentType == kControlContentPictHandle )
 110     {
 111         // owned by the bitmap, no release here
 112     }
 113 #if wxMAC_USE_CORE_GRAPHICS && 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 #define M_BITMAPDATA ((wxBitmapRefData *)m_refData)
 126
 127 void wxBitmapRefData::Init()
 128 {
 129     m_width = 0 ;
 130     m_height = 0 ;
 131     m_depth = 0 ;
 132     m_ok = false ;
 133     m_bitmapMask = NULL ;
 134 #if wxMAC_USE_CORE_GRAPHICS
 135     m_cgImageRef = NULL ;
 136 #endif
 137     m_iconRef = NULL ;
 138     m_pictHandle = NULL ;
 139     m_hBitmap = NULL ;
 140     m_hMaskBitmap = NULL;
 141     m_maskBytesPerRow = NULL ;
 142
 143     m_rawAccessCount = 0 ;
 144     m_hasAlpha = false;
 145 }
 146
 147 wxBitmapRefData::wxBitmapRefData()
 148 {
 149     Init() ;
 150 }
 151
 152 wxBitmapRefData::wxBitmapRefData( int w , int h , int d )
 153 {
 154     Init() ;
 155     Create( w , h , d ) ;
 156 }
 157
 158 bool wxBitmapRefData::Create( int w , int h , int d )
 159 {
 160     m_width = w ;
 161     m_height = h ;
 162     m_depth = d ;
 163
 164     m_bytesPerRow = w * 4 ;
 165     size_t size = m_bytesPerRow * h ;
 166     void*  data = m_memBuf.GetWriteBuf(size) ;
 167     memset( data ,  0 , size) ;
 168     m_memBuf.UngetWriteBuf(size) ;
 169
 170     m_hBitmap = NULL ;
 171     Rect rect = { 0 , 0 , m_height , m_width } ;
 172     verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_hBitmap , k32ARGBPixelFormat , &rect , NULL , NULL , 0 ,
 173         (char*) data , m_bytesPerRow ) ) ;
 174     wxASSERT_MSG( m_hBitmap , wxT("Unable to create GWorld context") ) ;
 175     m_ok = ( m_hBitmap != NULL ) ;
 176
 177     return m_ok ;
 178 }
 179
 180 void wxBitmapRefData::UseAlpha( bool use )
 181 {
 182     if ( m_hasAlpha == use )
 183         return ;
 184
 185     m_hasAlpha = use ;
 186     if ( m_hasAlpha )
 187     {
 188         int width = GetWidth() ;
 189         int height = GetHeight() ;
 190         m_maskBytesPerRow = ( width * 4 + 3 ) & 0xFFFFFFC ;
 191         size_t size = height * m_maskBytesPerRow ;
 192         unsigned char * data = (unsigned char * ) m_maskMemBuf.GetWriteBuf( size ) ;
 193         memset( data , 0 , size ) ;
 194         wxASSERT( m_hMaskBitmap == NULL ) ;
 195         Rect rect = { 0 , 0 , height , width } ;
 196         verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_hMaskBitmap , k32ARGBPixelFormat , &rect , NULL , NULL , 0 ,
 197             (char*) data , m_maskBytesPerRow ) ) ;
 198         wxASSERT_MSG( m_hMaskBitmap , wxT("Unable to create GWorld context for alpha mask") ) ;
 199         m_maskMemBuf.UngetWriteBuf(size) ;
 200 #if !wxMAC_USE_CORE_GRAPHICS
 201         UpdateAlphaMask() ;
 202 #endif
 203     }
 204     else
 205     {
 206         DisposeGWorld( m_hMaskBitmap ) ;
 207         m_hMaskBitmap = NULL ;
 208         m_maskBytesPerRow = 0 ;
 209     }
 210 }
 211
 212 void *wxBitmapRefData::GetRawAccess() const
 213 {
 214     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
 215     return m_memBuf.GetData() ;
 216 }
 217
 218 void *wxBitmapRefData::BeginRawAccess()
 219 {
 220     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") ) ;
 221     wxASSERT( m_rawAccessCount == 0 ) ;
 222     ++m_rawAccessCount ;
 223     // we must destroy an existing cached image, as
 224     // the bitmap data may change now
 225     wxASSERT_MSG( m_pictHandle == NULL && m_iconRef == NULL ,
 226         wxT("Currently, modifing bitmaps that are used in controls already is not supported") ) ;
 227 #if wxMAC_USE_CORE_GRAPHICS
 228     if ( m_cgImageRef )
 229     {
 230         CGImageRelease( m_cgImageRef ) ;
 231         m_cgImageRef = NULL ;
 232     }
 233 #endif
 234     return m_memBuf.GetData() ;
 235 }
 236
 237 void wxBitmapRefData::EndRawAccess()
 238 {
 239     wxCHECK_RET( Ok() , wxT("invalid bitmap") ) ;
 240     wxASSERT( m_rawAccessCount == 1 ) ;
 241     --m_rawAccessCount ;
 242 #if !wxMAC_USE_CORE_GRAPHICS
 243     UpdateAlphaMask() ;
 244 #endif
 245 }
 246
 247 bool wxBitmapRefData::HasNativeSize()
 248 {
 249     int w = GetWidth() ;
 250     int h = GetHeight() ;
 251     int sz = wxMax( w , h ) ;
 252
 253     if ( sz == 128 || sz == 48 || sz == 32 || sz == 16 )
 254         return true ;
 255     return false ;
 256 }
 257
 258 IconRef wxBitmapRefData::GetIconRef()
 259 {
 260     if ( m_iconRef == NULL )
 261     {
 262         // Create Icon Family Handle
 263
 264         IconFamilyHandle iconFamily = NULL ;
 265
 266         iconFamily = (IconFamilyHandle) NewHandle(8) ;
 267         (**iconFamily).resourceType = kIconFamilyType ;
 268         (**iconFamily).resourceSize = sizeof(OSType) + sizeof(Size);
 269
 270         int w = GetWidth() ;
 271         int h = GetHeight() ;
 272         int sz = wxMax( w , h ) ;
 273
 274         OSType dataType = 0 ;
 275         OSType maskType = 0 ;
 276
 277         if ( sz == 128 )
 278         {
 279             dataType = kThumbnail32BitData ;
 280             maskType = kThumbnail8BitMask ;
 281         }
 282         else if ( sz == 48 )
 283         {
 284             dataType = kHuge32BitData ;
 285             maskType = kHuge8BitMask ;
 286         }
 287         else if ( sz == 32 )
 288         {
 289             dataType = kLarge32BitData ;
 290             maskType = kLarge8BitMask ;
 291         }
 292         else if ( sz == 16 )
 293         {
 294             dataType = kSmall32BitData ;
 295             maskType = kSmall8BitMask ;
 296         }
 297
 298         if ( dataType != 0 )
 299         {
 300             // setup the header properly
 301
 302             Handle data = NULL ;
 303             Handle maskdata = NULL ;
 304             unsigned char * maskptr = NULL ;
 305             unsigned char * ptr = NULL ;
 306             size_t size ;
 307             size_t masksize ;
 308
 309             size = sz * sz * 4 ;
 310             data = NewHandle( size) ;
 311             HLock( data ) ;
 312             ptr = (unsigned char*) *data ;
 313             memset( ptr , 0, size ) ;
 314
 315             masksize = sz * sz ;
 316             maskdata = NewHandle( masksize ) ;
 317             HLock( maskdata ) ;
 318             maskptr = (unsigned char*) *maskdata ;
 319             memset( maskptr , 0 , masksize ) ;
 320
 321             bool hasAlpha = HasAlpha() ;
 322             wxMask *mask = m_bitmapMask ;
 323             unsigned char * source = (unsigned char*) GetRawAccess() ;
 324             unsigned char * masksource = mask ? (unsigned char*) mask->GetRawAccess() : NULL ;
 325             for ( int y = 0 ; y < h ; ++y )
 326             {
 327                 unsigned char * dest = ptr + y * sz * 4 ;
 328                 unsigned char * maskdest = maskptr + y * sz ;
 329                 for ( int x = 0 ; x < w ; ++x )
 330                 {
 331                     unsigned char a = *source ++ ;
 332                     unsigned char r = *source ++ ;
 333                     unsigned char g = *source ++ ;
 334                     unsigned char b = *source ++ ;
 335
 336                     *dest++ = 0 ;
 337                     *dest++ = r ;
 338                     *dest++ = g ;
 339                     *dest++ = b ;
 340
 341                     if ( mask )
 342                         *maskdest++ = *masksource++ ;
 343                     else if ( hasAlpha )
 344                         *maskdest++ = a ;
 345                     else
 346                         *maskdest++ = 0xFF ;
 347                 }
 348             }
 349
 350             OSStatus err = SetIconFamilyData( iconFamily, dataType , data ) ;
 351             wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 352
 353             err = SetIconFamilyData( iconFamily, maskType , maskdata ) ;
 354             wxASSERT_MSG( err == noErr , wxT("Error when adding mask") ) ;
 355             HUnlock( data ) ;
 356             HUnlock( maskdata ) ;
 357             DisposeHandle( data ) ;
 358             DisposeHandle( maskdata ) ;
 359         }
 360         else
 361         {
 362             iconFamily = (IconFamilyHandle) NewHandle(8) ;
 363             (**iconFamily).resourceType = kIconFamilyType ;
 364             (**iconFamily).resourceSize = sizeof(OSType) + sizeof(Size);
 365             PicHandle pic = GetPictHandle() ;
 366             SetIconFamilyData( iconFamily, 'PICT' , (Handle) pic ) ;
 367         }
 368
 369         // transform into IconRef
 370
 371         static int iconCounter = 2 ;
 372         OSStatus err = RegisterIconRefFromIconFamily( 'WXNG' , (OSType) iconCounter, iconFamily, &m_iconRef ) ;
 373         wxASSERT_MSG( err == noErr , wxT("Error when adding bitmap") ) ;
 374         // we have to retain a reference, as Unregister will decrement it
 375         AcquireIconRef( m_iconRef ) ;
 376         UnregisterIconRef( 'WXNG' , (OSType) iconCounter ) ;
 377         DisposeHandle( (Handle) iconFamily ) ;
 378         ++iconCounter ;
 379     }
 380     return m_iconRef ;
 381 }
 382
 383 PicHandle wxBitmapRefData::GetPictHandle()
 384 {
 385     if ( m_pictHandle == NULL )
 386     {
 387         CGrafPtr        origPort = NULL ;
 388         GDHandle        origDev = NULL ;
 389         GWorldPtr       wp = NULL ;
 390         GWorldPtr       mask = NULL ;
 391         int height = GetHeight() ;
 392         int width = GetWidth() ;
 393
 394         Rect rect = { 0 , 0 , height , width } ;
 395
 396         GetGWorld( &origPort , &origDev ) ;
 397
 398         wp = GetHBITMAP( &mask ) ;
 399
 400         RgnHandle clipRgn = NULL ;
 401
 402         if ( mask )
 403         {
 404             GWorldPtr monoworld ;
 405             clipRgn = NewRgn() ;
 406             OSStatus err = NewGWorld( &monoworld , 1 , &rect , NULL , NULL , 0 ) ;
 407             verify_noerr(err) ;
 408             LockPixels( GetGWorldPixMap( monoworld ) ) ;
 409             LockPixels( GetGWorldPixMap( mask ) ) ;
 410             SetGWorld( monoworld , NULL ) ;
 411             RGBColor       white = { 0xffff ,0xffff , 0xffff } ;
 412             RGBColor       black = { 0x0000 ,0x0000 , 0x0000 } ;
 413             RGBForeColor( &black ) ;
 414             RGBBackColor( &white ) ;
 415             CopyBits(GetPortBitMapForCopyBits(mask),
 416                     GetPortBitMapForCopyBits(monoworld),
 417                     &rect,
 418                     &rect,
 419                     srcCopy,NULL);
 420             BitMapToRegion( clipRgn , (BitMap*) *GetGWorldPixMap( monoworld ) ) ;
 421             UnlockPixels( GetGWorldPixMap( monoworld ) ) ;
 422             UnlockPixels( GetGWorldPixMap( mask ) ) ;
 423             DisposeGWorld( monoworld ) ;
 424         }
 425
 426         SetGWorld( wp , NULL ) ;
 427         Rect portRect ;
 428         GetPortBounds( wp , &portRect ) ;
 429         m_pictHandle = OpenPicture(&portRect);
 430
 431         if(m_pictHandle)
 432         {
 433             RGBColor       white = { 0xffff ,0xffff , 0xffff } ;
 434             RGBColor       black = { 0x0000 ,0x0000 , 0x0000 } ;
 435             RGBForeColor( &black ) ;
 436             RGBBackColor( &white ) ;
 437
 438             if ( clipRgn )
 439                 SetClip( clipRgn ) ;
 440
 441             LockPixels( GetGWorldPixMap( wp ) ) ;
 442             CopyBits(GetPortBitMapForCopyBits(wp),
 443                     GetPortBitMapForCopyBits(wp),
 444                     &portRect,
 445                     &portRect,
 446                     srcCopy,clipRgn);
 447             UnlockPixels( GetGWorldPixMap( wp ) ) ;
 448             ClosePicture();
 449         }
 450         SetGWorld( origPort , origDev ) ;
 451         if ( clipRgn )
 452             DisposeRgn( clipRgn ) ;
 453     }
 454     return m_pictHandle ;
 455 }
 456
 457 #if wxMAC_USE_CORE_GRAPHICS
 458 void wxMacMemoryBufferReleaseProc(void *info, const void *data, size_t size)
 459 {
 460     wxMemoryBuffer* membuf = (wxMemoryBuffer*) info ;
 461     wxASSERT( data == membuf->GetData() ) ;
 462     delete membuf ;
 463 }
 464
 465 CGImageRef wxBitmapRefData::CGImageCreate() const
 466 {
 467     wxASSERT( m_ok ) ;
 468     wxASSERT( m_rawAccessCount >= 0 ) ;
 469     CGImageRef image ;
 470     if ( m_rawAccessCount > 0 || m_cgImageRef == NULL )
 471     {
 472         size_t imageSize = m_width * m_height * 4 ;
 473         void * dataBuffer = m_memBuf.GetData() ;
 474         int w = m_width ;
 475         int h = m_height ;
 476         CGImageAlphaInfo alphaInfo = kCGImageAlphaNoneSkipFirst ;
 477         wxMemoryBuffer* membuf = NULL ;
 478
 479         if ( m_bitmapMask )
 480         {
 481             membuf = new wxMemoryBuffer( imageSize ) ;
 482             memcpy( membuf->GetData() , dataBuffer , imageSize ) ;
 483             unsigned char *sourcemaskstart = (unsigned char *) m_bitmapMask->GetRawAccess() ;
 484             int maskrowbytes = m_bitmapMask->GetBytesPerRow() ;
 485             unsigned char *destalpha = (unsigned char *) membuf->GetData() ;
 486             alphaInfo = kCGImageAlphaFirst ;
 487             for ( int y = 0 ; y < h ; ++y , sourcemaskstart += maskrowbytes)
 488             {
 489                 unsigned char *sourcemask = sourcemaskstart ;
 490                 for( int x = 0 ; x < w ; ++x , sourcemask++ , destalpha += 4 )
 491                 {
 492                     *destalpha = *sourcemask ;
 493                 }
 494             }
 495         }
 496         else if ( m_hasAlpha )
 497         {
 498 #if wxMAC_USE_PREMULTIPLIED_ALPHA
 499             alphaInfo = kCGImageAlphaPremultipliedFirst ;
 500 #else
 501             alphaInfo = kCGImageAlphaFirst ;
 502 #endif
 503             membuf = new wxMemoryBuffer( m_memBuf ) ;
 504         }
 505         else
 506         {
 507             membuf = new wxMemoryBuffer( m_memBuf ) ;
 508         }
 509         CGColorSpaceRef colorSpace = wxMacGetGenericRGBColorSpace();
 510         CGDataProviderRef dataProvider =
 511             CGDataProviderCreateWithData( membuf , (const void *)membuf->GetData() , imageSize,
 512                 wxMacMemoryBufferReleaseProc );
 513         image =
 514             ::CGImageCreate( w, h, 8 , 32 , 4 * m_width , colorSpace, alphaInfo ,
 515                         dataProvider, NULL , false , kCGRenderingIntentDefault );
 516         CGDataProviderRelease( dataProvider);
 517     }
 518     else
 519     {
 520         image = m_cgImageRef ;
 521         CGImageRetain( image ) ;
 522     }
 523     if ( m_rawAccessCount == 0 && m_cgImageRef == NULL)
 524     {
 525         // we keep it for later use
 526         m_cgImageRef = image ;
 527         CGImageRetain( image ) ;
 528     }
 529     return image ;
 530 }
 531 #endif
 532
 533 GWorldPtr wxBitmapRefData::GetHBITMAP(GWorldPtr* mask) const
 534 {
 535     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 536     if ( mask )
 537     {
 538         *mask = NULL ;
 539         if ( m_bitmapMask )
 540             *mask = (GWorldPtr) m_bitmapMask->GetHBITMAP() ;
 541         else if ( m_hasAlpha )
 542         {
 543 #if !wxMAC_USE_CORE_GRAPHICS
 544             if ( m_rawAccessCount > 0 )
 545                 UpdateAlphaMask() ;
 546 #else
 547             // this structure is not kept in synch when using CG, so if someone
 548             // is really accessing the Graphports, we have to sync it
 549             UpdateAlphaMask() ;
 550 #endif
 551             *mask = m_hMaskBitmap ;
 552         }
 553     }
 554     return m_hBitmap ;
 555 }
 556
 557 void wxBitmapRefData::UpdateAlphaMask() const
 558 {
 559     if ( m_hasAlpha )
 560     {
 561         unsigned char *sourcemask = (unsigned char *) GetRawAccess() ;
 562         unsigned char *destalphabase = (unsigned char *) m_maskMemBuf.GetData() ;
 563
 564         int h = GetHeight() ;
 565         int w = GetWidth() ;
 566
 567         for ( int y = 0 ; y < h ; ++y , destalphabase += m_maskBytesPerRow )
 568         {
 569             unsigned char* destalpha = destalphabase ;
 570             for( int x = 0 ; x < w ; ++x , sourcemask += 4 )
 571             {
 572                 // we must have 24 bit depth for non quartz smooth alpha
 573                 *destalpha++ = 255 ;
 574                 *destalpha++ = 255  - *sourcemask ;
 575                 *destalpha++ = 255  - *sourcemask ;
 576                 *destalpha++ = 255  - *sourcemask ;
 577             }
 578         }
 579     }
 580 }
 581
 582 void wxBitmapRefData::Free()
 583 {
 584     wxASSERT_MSG( m_rawAccessCount == 0 , wxT("Bitmap still selected when destroyed") ) ;
 585
 586 #if wxMAC_USE_CORE_GRAPHICS
 587     if ( m_cgImageRef )
 588     {
 589         CGImageRelease( m_cgImageRef ) ;
 590         m_cgImageRef = NULL ;
 591     }
 592 #endif
 593     if ( m_iconRef )
 594     {
 595         ReleaseIconRef( m_iconRef ) ;
 596         m_iconRef = NULL ;
 597     }
 598     if ( m_pictHandle )
 599     {
 600         KillPicture( m_pictHandle ) ;
 601         m_pictHandle = NULL ;
 602     }
 603     if ( m_hBitmap )
 604     {
 605         DisposeGWorld( MAC_WXHBITMAP(m_hBitmap) ) ;
 606         m_hBitmap = NULL ;
 607     }
 608     if ( m_hMaskBitmap )
 609     {
 610         DisposeGWorld( MAC_WXHBITMAP(m_hMaskBitmap) ) ;
 611         m_hMaskBitmap = NULL ;
 612     }
 613
 614     if (m_bitmapMask)
 615     {
 616         delete m_bitmapMask;
 617         m_bitmapMask = NULL;
 618     }
 619 }
 620
 621 wxBitmapRefData::~wxBitmapRefData()
 622 {
 623     Free() ;
 624 }
 625
 626 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 627 {
 628     int w = icon.GetWidth() ;
 629     int h = icon.GetHeight() ;
 630
 631
 632     Create( icon.GetWidth() , icon.GetHeight() ) ;
 633
 634     bool created = false ;
 635
 636     if ( w == h && ( w == 16 || w == 32 || w == 48 || w == 128 ) )
 637     {
 638         IconFamilyHandle iconFamily = NULL ;
 639         Handle imagehandle = NewHandle(0) ;
 640         Handle maskhandle = NewHandle(0) ;
 641
 642         OSType maskType = 0;
 643         OSType dataType = 0;
 644         IconSelectorValue selector = 0 ;
 645         if ( w == 128 )
 646         {
 647             dataType = kThumbnail32BitData ;
 648             maskType = kThumbnail8BitMask ;
 649             selector = kSelectorAllAvailableData ;
 650         }
 651         else if ( w == 48 )
 652         {
 653             dataType = kHuge32BitData ;
 654             maskType = kHuge8BitMask ;
 655             selector = kSelectorHuge32Bit | kSelectorHuge8BitMask ;
 656         }
 657         else if ( w == 32 )
 658         {
 659             dataType = kLarge32BitData ;
 660             maskType = kLarge8BitMask ;
 661             selector = kSelectorLarge32Bit | kSelectorLarge8BitMask ;
 662         }
 663         else if ( w == 16 )
 664         {
 665             dataType = kSmall32BitData ;
 666             maskType = kSmall8BitMask ;
 667             selector = kSelectorSmall32Bit | kSelectorSmall8BitMask ;
 668         }
 669
 670
 671         OSStatus err = ( IconRefToIconFamily( MAC_WXHICON(icon.GetHICON()) , selector , &iconFamily ) ) ;
 672
 673         err =( GetIconFamilyData( iconFamily , dataType , imagehandle ) ) ;
 674         err =( GetIconFamilyData( iconFamily , maskType , maskhandle ) ) ;
 675         size_t imagehandlesize = GetHandleSize( imagehandle ) ;
 676         size_t maskhandlesize = GetHandleSize( maskhandle ) ;
 677
 678         if ( imagehandlesize != 0 && maskhandlesize != 0 )
 679         {
 680             wxASSERT( GetHandleSize( imagehandle ) == w * 4 * h ) ;
 681             wxASSERT( GetHandleSize( maskhandle ) == w * h ) ;
 682             UseAlpha() ;
 683             unsigned char *source = (unsigned char *) *imagehandle ;
 684             unsigned char *sourcemask = (unsigned char *) *maskhandle ;
 685
 686             unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 687             for ( int y = 0 ; y < h ; ++y )
 688             {
 689                 for ( int x = 0 ; x < w ; ++x )
 690                 {
 691                     *destination++ = *sourcemask++ ;
 692                     source++ ;
 693                     *destination++ = *source++ ;
 694                     *destination++ = *source++ ;
 695                     *destination++ = *source++ ;
 696                 }
 697             }
 698             EndRawAccess() ;
 699             DisposeHandle( imagehandle ) ;
 700             DisposeHandle( maskhandle ) ;
 701         }
 702         DisposeHandle( (Handle) iconFamily ) ;
 703
 704     }
 705
 706     if ( !created )
 707     {
 708         wxMemoryDC dc ;
 709         dc.SelectObject( *this ) ;
 710         dc.DrawIcon( icon , 0 , 0 ) ;
 711         dc.SelectObject( wxNullBitmap ) ;
 712     }
 713     return true;
 714 }
 715
 716 wxBitmap::wxBitmap()
 717 {
 718 }
 719
 720 wxBitmap::~wxBitmap()
 721 {
 722 }
 723
 724 wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
 725 {
 726     m_refData = new wxBitmapRefData( the_width , the_height , no_bits ) ;
 727
 728     if ( no_bits == 1 )
 729     {
 730         int linesize = ( the_width / (sizeof(unsigned char) * 8)) ;
 731         if ( the_width % (sizeof(unsigned char) * 8) ) {
 732             linesize += sizeof(unsigned char);
 733         }
 734         unsigned char* linestart = (unsigned char*) bits ;
 735         unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 736         for ( int y = 0 ; y < the_height ; ++y , linestart += linesize )
 737         {
 738             for ( int x = 0 ; x < the_width ; ++x )
 739             {
 740                 int index = x / 8 ;
 741                 int bit = x % 8 ;
 742                 int mask = 1 << bit ;
 743                 if ( linestart[index] & mask )
 744                 {
 745                     *destination++ = 0xFF ;
 746                     *destination++ = 0 ;
 747                     *destination++ = 0 ;
 748                     *destination++ = 0 ;
 749                 }
 750                 else
 751                 {
 752                     *destination++ = 0xFF ;
 753                     *destination++ = 0xFF ;
 754                     *destination++ = 0xFF ;
 755                     *destination++ = 0xFF ;
 756                 }
 757             }
 758         }
 759         EndRawAccess() ;
 760     }
 761     else
 762     {
 763         wxFAIL_MSG(wxT("multicolor BITMAPs not yet implemented"));
 764     }
 765 }
 766
 767 wxBitmap::wxBitmap(int w, int h, int d)
 768 {
 769     (void)Create(w, h, d);
 770 }
 771
 772 wxBitmap::wxBitmap(void *data, wxBitmapType type, int width, int height, int depth)
 773 {
 774     (void) Create(data, type, width, height, depth);
 775 }
 776
 777 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
 778 {
 779     LoadFile(filename, type);
 780 }
 781
 782 wxBitmap::wxBitmap(const char **bits)
 783 {
 784     (void) CreateFromXpm(bits);
 785 }
 786
 787 wxBitmap::wxBitmap(char **bits)
 788 {
 789     (void) CreateFromXpm((const char **)bits);
 790 }
 791
 792 void* wxBitmap::GetRawAccess() const
 793 {
 794     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 795     return M_BITMAPDATA->GetRawAccess() ;
 796 }
 797
 798 void* wxBitmap::BeginRawAccess()
 799 {
 800     wxCHECK_MSG( Ok() , NULL , wxT("invalid bitmap") ) ;
 801     return M_BITMAPDATA->BeginRawAccess() ;
 802 }
 803
 804 void wxBitmap::EndRawAccess()
 805 {
 806     wxCHECK_RET( Ok() , wxT("invalid bitmap") ) ;
 807     M_BITMAPDATA->EndRawAccess() ;
 808 }
 809
 810 bool wxBitmap::CreateFromXpm(const char **bits)
 811 {
 812     wxCHECK_MSG( bits != NULL, FALSE, wxT("invalid bitmap data") )
 813     wxXPMDecoder decoder;
 814     wxImage img = decoder.ReadData(bits);
 815     wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") )
 816     *this = wxBitmap(img);
 817     return TRUE;
 818 }
 819
 820 #if wxMAC_USE_CORE_GRAPHICS
 821 WXCGIMAGEREF wxBitmap::CGImageCreate() const
 822 {
 823     wxCHECK_MSG( Ok(), NULL , wxT("invalid bitmap") ) ;
 824     return M_BITMAPDATA->CGImageCreate() ;
 825 }
 826 #endif
 827
 828 wxBitmap wxBitmap::GetSubBitmap(const wxRect &rect) const
 829 {
 830     wxCHECK_MSG( Ok() &&
 831                 (rect.x >= 0) && (rect.y >= 0) &&
 832                 (rect.x+rect.width <= GetWidth()) &&
 833                 (rect.y+rect.height <= GetHeight()),
 834                 wxNullBitmap, wxT("invalid bitmap or bitmap region") );
 835
 836
 837     wxBitmap ret( rect.width, rect.height, GetDepth() );
 838     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 839
 840
 841     int sourcewidth = GetWidth() ;
 842     int destwidth = rect.width ;
 843     int destheight = rect.height ;
 844     {
 845         unsigned char * sourcedata = (unsigned char*) GetRawAccess() ;
 846         unsigned char * destdata = (unsigned char*) ret.BeginRawAccess() ;
 847         int sourcelinesize = sourcewidth * 4 ;
 848         int destlinesize = destwidth * 4 ;
 849         unsigned char *source = sourcedata + rect.x * 4 + rect.y * sourcelinesize ;
 850         unsigned char *dest = destdata ;
 851         for(int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
 852         {
 853             memcpy( dest , source , destlinesize ) ;
 854         }
 855     }
 856     ret.EndRawAccess() ;
 857
 858     if ( M_BITMAPDATA->m_bitmapMask )
 859     {
 860         wxMemoryBuffer maskbuf ;
 861         int rowBytes = ( destwidth + 3 ) & 0xFFFFFFC ;
 862         size_t maskbufsize = rowBytes * destheight ;
 863         unsigned char * destdata = (unsigned char * ) maskbuf.GetWriteBuf( maskbufsize ) ;
 864
 865         int sourcelinesize = M_BITMAPDATA->m_bitmapMask->GetBytesPerRow()  ;
 866         int destlinesize = rowBytes ;
 867         unsigned char *source = (unsigned char *) M_BITMAPDATA->m_bitmapMask->GetRawAccess() ;
 868         source += rect.x + rect.y * sourcelinesize ;
 869         unsigned char *dest = destdata ;
 870
 871         for(int yy = 0; yy < destheight; ++yy, source += sourcelinesize , dest += destlinesize)
 872         {
 873             memcpy( dest , source , destlinesize ) ;
 874         }
 875         maskbuf.UngetWriteBuf( maskbufsize ) ;
 876         ret.SetMask( new wxMask( maskbuf , destwidth , destheight , rowBytes ) ) ;
 877     }
 878     else if ( HasAlpha() )
 879         ret.UseAlpha() ;
 880
 881     return ret;
 882 }
 883
 884 bool wxBitmap::Create(int w, int h, int d)
 885 {
 886     UnRef();
 887
 888     if ( d < 0 )
 889         d = wxDisplayDepth() ;
 890
 891     m_refData = new wxBitmapRefData( w , h , d );
 892
 893     return M_BITMAPDATA->Ok() ;
 894 }
 895
 896 bool wxBitmap::LoadFile(const wxString& filename, wxBitmapType type)
 897 {
 898     UnRef();
 899
 900     wxBitmapHandler *handler = FindHandler(type);
 901
 902     if ( handler )
 903     {
 904         m_refData = new wxBitmapRefData;
 905
 906         return handler->LoadFile(this, filename, type, -1, -1);
 907     }
 908     else
 909     {
 910         wxImage loadimage(filename, type);
 911         if (loadimage.Ok()) {
 912             *this = loadimage;
 913             return true;
 914         }
 915     }
 916     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
 917     return false;
 918 }
 919
 920 bool wxBitmap::Create(void *data, wxBitmapType type, int width, int height, int depth)
 921 {
 922     UnRef();
 923
 924     m_refData = new wxBitmapRefData;
 925
 926     wxBitmapHandler *handler = FindHandler(type);
 927
 928     if ( handler == NULL ) {
 929         wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
 930
 931         return FALSE;
 932     }
 933
 934     return handler->Create(this, data, type, width, height, depth);
 935 }
 936
 937 wxBitmap::wxBitmap(const wxImage& image, int depth)
 938 {
 939     wxCHECK_RET( image.Ok(), wxT("invalid image") )
 940
 941     // width and height of the device-dependent bitmap
 942     int width = image.GetWidth();
 943     int height = image.GetHeight();
 944
 945     m_refData = new wxBitmapRefData( width , height , depth ) ;;
 946
 947     // Create picture
 948
 949     bool hasAlpha = false ;
 950
 951     if ( image.HasMask() )
 952     {
 953         // takes precedence, don't mix with alpha info
 954     }
 955     else
 956     {
 957         hasAlpha = image.HasAlpha() ;
 958     }
 959
 960     if ( hasAlpha )
 961         UseAlpha() ;
 962
 963     unsigned char* destination = (unsigned char*) BeginRawAccess() ;
 964
 965     register unsigned char* data = image.GetData();
 966     const unsigned char *alpha = hasAlpha ? image.GetAlpha() : NULL ;
 967     for (int y = 0; y < height; y++)
 968     {
 969         for (int x = 0; x < width; x++)
 970         {
 971             if ( hasAlpha )
 972             {
 973                 const unsigned char a = *alpha++;
 974                 *destination++ = a ;
 975 #if wxMAC_USE_PREMULTIPLIED_ALPHA
 976                 *destination++ = ((*data++) * a + 127 ) / 255 ;
 977                 *destination++ = ((*data++) * a + 127 ) / 255 ;
 978                 *destination++ = ((*data++) * a + 127 ) / 255 ;
 979 #else
 980                 *destination++ = *data++ ;
 981                 *destination++ = *data++ ;
 982                 *destination++ = *data++ ;
 983 #endif
 984             }
 985             else
 986             {
 987                 *destination++ = 0xFF ;
 988                 *destination++ = *data++ ;
 989                 *destination++ = *data++ ;
 990                 *destination++ = *data++ ;
 991             }
 992         }
 993     }
 994     EndRawAccess() ;
 995     if ( image.HasMask() )
 996     {
 997         SetMask( new wxMask( *this , wxColour( image.GetMaskRed() , image.GetMaskGreen() , image.GetMaskBlue() ) ) ) ;
 998     }
 999 }
1000
1001 wxImage wxBitmap::ConvertToImage() const
1002 {
1003     wxImage image;
1004
1005     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
1006
1007     // create an wxImage object
1008     int width = GetWidth();
1009     int height = GetHeight();
1010     image.Create( width, height );
1011
1012     unsigned char *data = image.GetData();
1013     wxCHECK_MSG( data, wxNullImage, wxT("Could not allocate data for image") );
1014
1015     unsigned char* source = (unsigned char*) GetRawAccess() ;
1016
1017     bool hasAlpha = false ;
1018     bool hasMask = false ;
1019     int maskBytesPerRow = 0 ;
1020     unsigned char *alpha = NULL ;
1021     unsigned char *mask = NULL ;
1022     if ( HasAlpha() )
1023     {
1024         hasAlpha = true ;
1025     }
1026
1027     if ( GetMask() )
1028     {
1029         hasMask = true ;
1030         mask = (unsigned char*) GetMask()->GetRawAccess() ;
1031         maskBytesPerRow = GetMask()->GetBytesPerRow() ;
1032     }
1033
1034     if ( hasAlpha )
1035     {
1036         image.SetAlpha() ;
1037         alpha = image.GetAlpha() ;
1038     }
1039     int index = 0;
1040
1041     // The following masking algorithm is the same as well in msw/gtk:
1042     // the colour used as transparent one in wxImage and the one it is
1043     // replaced with when it really occurs in the bitmap
1044     static const int MASK_RED = 1;
1045     static const int MASK_GREEN = 2;
1046     static const int MASK_BLUE = 3;
1047     static const int MASK_BLUE_REPLACEMENT = 2;
1048
1049     for (int yy = 0; yy < height; yy++ , mask += maskBytesPerRow )
1050     {
1051         unsigned char * maskp = mask ;
1052         for (int xx = 0; xx < width; xx++)
1053         {
1054             long color = *((long*) source) ;
1055             unsigned char a = ((color&0xFF000000) >> 24) ;
1056             unsigned char r = ((color&0x00FF0000) >> 16) ;
1057             unsigned char g = ((color&0x0000FF00) >> 8) ;
1058             unsigned char b = (color&0x000000FF);
1059             if ( hasMask )
1060             {
1061                 if ( *maskp++ == 0 )
1062                 {
1063                     if ( r == MASK_RED && g == MASK_GREEN && b == MASK_BLUE )
1064                         b = MASK_BLUE_REPLACEMENT ;
1065                     else
1066                     {
1067                         r = MASK_RED ;
1068                         g = MASK_GREEN ;
1069                         b = MASK_BLUE ;
1070                     }
1071                 }
1072             }
1073             else if ( hasAlpha )
1074                 *alpha++ = a ;
1075
1076             data[index    ] = r ;
1077             data[index + 1] = g ;
1078             data[index + 2] = b ;
1079             index += 3;
1080             source += 4 ;
1081         }
1082     }
1083     if ( hasMask )
1084         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1085     return image;
1086 }
1087
1088
1089 bool wxBitmap::SaveFile(const wxString& filename, wxBitmapType type,
1090                         const wxPalette *palette) const
1091 {
1092     wxBitmapHandler *handler = FindHandler(type);
1093
1094     if ( handler )
1095     {
1096         return handler->SaveFile(this, filename, type, palette);
1097     }
1098     else
1099     {
1100         wxImage image = ConvertToImage();
1101
1102         return image.SaveFile(filename, type);
1103     }
1104
1105     wxLogWarning(wxT("no bitmap handler for type %d defined."), type);
1106     return false;
1107 }
1108
1109 bool wxBitmap::Ok() const
1110 {
1111    return (M_BITMAPDATA && M_BITMAPDATA->Ok());
1112 }
1113
1114 int wxBitmap::GetHeight() const
1115 {
1116    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1117
1118    return M_BITMAPDATA->GetHeight();
1119 }
1120
1121 int wxBitmap::GetWidth() const
1122 {
1123    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1124
1125    return M_BITMAPDATA->GetWidth() ;
1126 }
1127
1128 int wxBitmap::GetDepth() const
1129 {
1130    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1131
1132    return M_BITMAPDATA->GetDepth();
1133 }
1134
1135 #if WXWIN_COMPATIBILITY_2_4
1136
1137 int wxBitmap::GetQuality() const
1138 {
1139     return 0;
1140 }
1141
1142 #endif
1143
1144 wxMask *wxBitmap::GetMask() const
1145 {
1146    wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1147
1148    return M_BITMAPDATA->m_bitmapMask;
1149 }
1150
1151 bool wxBitmap::HasAlpha() const
1152 {
1153    wxCHECK_MSG( Ok(), false , wxT("invalid bitmap") );
1154
1155    return M_BITMAPDATA->HasAlpha() ;
1156 }
1157
1158 void wxBitmap::SetWidth(int w)
1159 {
1160     if (!M_BITMAPDATA)
1161         m_refData = new wxBitmapRefData;
1162
1163     M_BITMAPDATA->SetWidth(w);
1164 }
1165
1166 void wxBitmap::SetHeight(int h)
1167 {
1168     if (!M_BITMAPDATA)
1169         m_refData = new wxBitmapRefData;
1170
1171     M_BITMAPDATA->SetHeight(h);
1172 }
1173
1174 void wxBitmap::SetDepth(int d)
1175 {
1176     if (!M_BITMAPDATA)
1177         m_refData = new wxBitmapRefData;
1178
1179     M_BITMAPDATA->SetDepth(d);
1180 }
1181
1182 #if WXWIN_COMPATIBILITY_2_4
1183
1184 void wxBitmap::SetQuality(int WXUNUSED(quality))
1185 {
1186 }
1187
1188 #endif
1189
1190 void wxBitmap::SetOk(bool isOk)
1191 {
1192     if (!M_BITMAPDATA)
1193         m_refData = new wxBitmapRefData;
1194
1195     M_BITMAPDATA->SetOk(isOk);
1196 }
1197
1198 #if wxUSE_PALETTE
1199 wxPalette *wxBitmap::GetPalette() const
1200 {
1201    wxCHECK_MSG( Ok(), NULL, wxT("Invalid bitmap  GetPalette()") );
1202
1203    return &M_BITMAPDATA->m_bitmapPalette;
1204 }
1205
1206 void wxBitmap::SetPalette(const wxPalette& palette)
1207 {
1208     if (!M_BITMAPDATA)
1209         m_refData = new wxBitmapRefData;
1210
1211     M_BITMAPDATA->m_bitmapPalette = palette ;
1212 }
1213 #endif // wxUSE_PALETTE
1214
1215 void wxBitmap::SetMask(wxMask *mask)
1216 {
1217     if (!M_BITMAPDATA)
1218         m_refData = new wxBitmapRefData;
1219
1220     // Remove existing mask if there is one.
1221     delete M_BITMAPDATA->m_bitmapMask;
1222
1223     M_BITMAPDATA->m_bitmapMask = mask ;
1224 }
1225
1226 WXHBITMAP wxBitmap::GetHBITMAP(WXHBITMAP* mask) const
1227 {
1228     return WXHBITMAP(M_BITMAPDATA->GetHBITMAP((GWorldPtr*)mask));
1229 }
1230
1231 // ----------------------------------------------------------------------------
1232 // wxMask
1233 // ----------------------------------------------------------------------------
1234
1235 wxMask::wxMask()
1236 {
1237     Init() ;
1238 }
1239
1240 // Construct a mask from a bitmap and a colour indicating
1241 // the transparent area
1242 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
1243 {
1244     Init() ;
1245     Create(bitmap, colour);
1246 }
1247
1248 // Construct a mask from a mono bitmap (copies the bitmap).
1249 wxMask::wxMask(const wxBitmap& bitmap)
1250 {
1251     Init() ;
1252     Create(bitmap);
1253 }
1254
1255 // Construct a mask from a mono bitmap (copies the bitmap).
1256 wxMask::wxMask(const wxMemoryBuffer& data, int width , int height , int bytesPerRow )
1257 {
1258     Init() ;
1259     Create(data, width , height , bytesPerRow );
1260 }
1261
1262 wxMask::~wxMask()
1263 {
1264     if ( m_maskBitmap )
1265     {
1266         DisposeGWorld( (GWorldPtr) m_maskBitmap ) ;
1267         m_maskBitmap = NULL ;
1268     }
1269 }
1270
1271 void wxMask::Init()
1272 {
1273     m_width = m_height = m_bytesPerRow = 0 ;
1274     m_maskBitmap = NULL ;
1275 }
1276
1277 void *wxMask::GetRawAccess() const
1278 {
1279     return m_memBuf.GetData() ;
1280 }
1281
1282 // this can be a k8IndexedGrayPixelFormat GWorld, because it never stores other values than black or white
1283 // so no rainbox colors will be created by QD when blitting
1284
1285 void wxMask::RealizeNative()
1286 {
1287     if ( m_maskBitmap )
1288     {
1289        DisposeGWorld(  (GWorldPtr) m_maskBitmap ) ;
1290        m_maskBitmap = NULL ;
1291     }
1292     Rect rect = { 0 , 0 , m_height , m_width } ;
1293     verify_noerr( NewGWorldFromPtr( (GWorldPtr*) &m_maskBitmap , k8IndexedGrayPixelFormat , &rect , NULL , NULL , 0 ,
1294         (char*) m_memBuf.GetData() , m_bytesPerRow ) ) ;
1295 }
1296
1297 // Create a mask from a mono bitmap (copies the bitmap).
1298 bool wxMask::Create(const wxMemoryBuffer& data,int width , int height , int bytesPerRow)
1299 {
1300     m_memBuf = data ;
1301     m_width = width ;
1302     m_height = height ;
1303     m_bytesPerRow = bytesPerRow ;
1304     wxASSERT( data.GetDataLen() == (size_t)(height * bytesPerRow) ) ;
1305     RealizeNative() ;
1306     return true ;
1307 }
1308
1309 // Create a mask from a mono bitmap (copies the bitmap).
1310 bool wxMask::Create(const wxBitmap& bitmap)
1311 {
1312     m_width = bitmap.GetWidth() ;
1313     m_height = bitmap.GetHeight() ;
1314     m_bytesPerRow = ( m_width + 3 ) & 0xFFFFFFC ;
1315     size_t size = m_bytesPerRow * m_height ;
1316     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1317     memset( destdatabase , 0 , size ) ;
1318     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1319     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow )
1320     {
1321         unsigned char *destdata= destdatabase ;
1322         for( int x = 0 ; x < m_width ; ++x )
1323         {
1324             srcdata++ ;
1325             unsigned char r = *srcdata++ ;
1326             unsigned char g = *srcdata++ ;
1327             unsigned char b = *srcdata++ ;
1328             if ( ( r + g + b ) > 0x10 )
1329                 *destdata++ = 0x00 ;
1330             else
1331                 *destdata++ = 0xFF ;
1332         }
1333     }
1334     m_memBuf.UngetWriteBuf( size ) ;
1335     RealizeNative() ;
1336     return TRUE;
1337 }
1338
1339 // Create a mask from a bitmap and a colour indicating
1340 // the transparent area
1341 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1342 {
1343     m_width = bitmap.GetWidth() ;
1344     m_height = bitmap.GetHeight() ;
1345     m_bytesPerRow = ( m_width + 3 ) & 0xFFFFFFC ;
1346     size_t size = m_bytesPerRow * m_height ;
1347
1348     unsigned char * destdatabase = (unsigned char*) m_memBuf.GetWriteBuf( size ) ;
1349     memset( destdatabase , 0 , size ) ;
1350     unsigned char * srcdata = (unsigned char*) bitmap.GetRawAccess() ;
1351     for ( int y = 0 ; y < m_height ; ++y , destdatabase += m_bytesPerRow)
1352     {
1353         unsigned char *destdata= destdatabase ;
1354         for( int x = 0 ; x < m_width ; ++x )
1355         {
1356             srcdata++ ;
1357             unsigned char r = *srcdata++ ;
1358             unsigned char g = *srcdata++ ;
1359             unsigned char b = *srcdata++ ;
1360             if ( colour == wxColour( r , g , b) )
1361                 *destdata++ = 0x00 ;
1362             else
1363                 *destdata++ = 0xFF ;
1364         }
1365     }
1366     m_memBuf.UngetWriteBuf( size ) ;
1367     RealizeNative() ;
1368     return TRUE;
1369 }
1370
1371 WXHBITMAP wxMask::GetHBITMAP() const
1372 {
1373     return m_maskBitmap ;
1374 }
1375
1376 // ----------------------------------------------------------------------------
1377 // wxBitmapHandler
1378 // ----------------------------------------------------------------------------
1379
1380 wxBitmapHandler::~wxBitmapHandler()
1381 {
1382 }
1383
1384 bool wxBitmapHandler::Create(wxBitmap *bitmap, void *data, long type, int width, int height, int depth)
1385 {
1386     return FALSE;
1387 }
1388
1389 bool wxBitmapHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1390         int desiredWidth, int desiredHeight)
1391 {
1392     return FALSE;
1393 }
1394
1395 bool wxBitmapHandler::SaveFile(const wxBitmap *bitmap, const wxString& name, int type, const wxPalette *palette)
1396 {
1397     return FALSE;
1398 }
1399
1400 // ----------------------------------------------------------------------------
1401 // Standard Handlers
1402 // ----------------------------------------------------------------------------
1403
1404 class WXDLLEXPORT wxPICTResourceHandler: public wxBitmapHandler
1405 {
1406     DECLARE_DYNAMIC_CLASS(wxPICTResourceHandler)
1407 public:
1408     inline wxPICTResourceHandler()
1409     {
1410         SetName(wxT("Macintosh Pict resource"));
1411         SetExtension(wxEmptyString);
1412         SetType(wxBITMAP_TYPE_PICT_RESOURCE);
1413     };
1414
1415     virtual bool LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1416           int desiredWidth, int desiredHeight);
1417 };
1418 IMPLEMENT_DYNAMIC_CLASS(wxPICTResourceHandler, wxBitmapHandler)
1419
1420
1421 bool  wxPICTResourceHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
1422           int desiredWidth, int desiredHeight)
1423 {
1424 #if wxUSE_METAFILE
1425     Str255 theName ;
1426     wxMacStringToPascal( name , theName ) ;
1427
1428     PicHandle thePict = (PicHandle ) GetNamedResource( 'PICT' , theName ) ;
1429     if ( thePict )
1430     {
1431         wxMetafile mf ;
1432         mf.SetHMETAFILE((WXHMETAFILE) thePict ) ;
1433         bitmap->Create( mf.GetWidth() , mf.GetHeight() ) ;
1434         wxMemoryDC dc ;
1435         dc.SelectObject( *bitmap ) ;
1436         mf.Play( &dc ) ;
1437         dc.SelectObject( wxNullBitmap ) ;
1438         return TRUE ;
1439     }
1440 #endif //wxUSE_METAFILE
1441     return FALSE ;
1442 }
1443
1444
1445 void wxBitmap::InitStandardHandlers()
1446 {
1447     AddHandler(new wxPICTResourceHandler) ;
1448     AddHandler(new wxICONResourceHandler) ;
1449 }
1450
1451 // ----------------------------------------------------------------------------
1452 // raw bitmap access support
1453 // ----------------------------------------------------------------------------
1454
1455 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1456 {
1457     if ( !Ok() )
1458     {
1459         // no bitmap, no data (raw or otherwise)
1460         return NULL;
1461     }
1462
1463     data.m_width = GetWidth() ;
1464     data.m_height = GetHeight() ;
1465     data.m_stride = GetWidth() * 4 ;
1466     return GetRawAccess() ;
1467 }
1468
1469 void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
1470 {
1471     if ( !Ok() )
1472         return;
1473
1474     // TODO : if we have some information about the API we should check
1475     // this code looks strange...
1476
1477     if ( M_BITMAPDATA->HasAlpha() )
1478     {
1479         wxAlphaPixelData& data = (wxAlphaPixelData&)dataBase;
1480
1481         int w = data.GetWidth(),
1482             h = data.GetHeight();
1483
1484         wxBitmap bmpMask(GetWidth(), GetHeight(), 32);
1485         wxAlphaPixelData dataMask(bmpMask, data.GetOrigin(), wxSize(w, h));
1486         wxAlphaPixelData::Iterator pMask(dataMask),
1487                                    p(data);
1488         for ( int y = 0; y < h; y++ )
1489         {
1490             wxAlphaPixelData::Iterator rowStartMask = pMask,
1491                                        rowStart = p;
1492
1493             for ( int x = 0; x < w; x++ )
1494             {
1495                 const wxAlphaPixelData::Iterator::ChannelType
1496                     alpha = p.Alpha();
1497
1498                 pMask.Red() = alpha;
1499                 pMask.Green() = alpha;
1500                 pMask.Blue() = alpha;
1501
1502                 ++p;
1503                 ++pMask;
1504             }
1505
1506             p = rowStart;
1507             p.OffsetY(data, 1);
1508
1509             pMask = rowStartMask;
1510             pMask.OffsetY(dataMask, 1);
1511         }
1512
1513         SetMask(new wxMask(bmpMask));
1514     }
1515 }
1516
1517 void wxBitmap::UseAlpha()
1518 {
1519     // remember that we are using alpha channel, we'll need to create a proper
1520     // mask in UngetRawData()
1521     M_BITMAPDATA->UseAlpha( true );
1522 }