src/msw/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        bitmap.cpp
   3 // Purpose:     wxBitmap
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "bitmap.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include <stdio.h>
  33
  34     #include "wx/list.h"
  35     #include "wx/utils.h"
  36     #include "wx/app.h"
  37     #include "wx/palette.h"
  38     #include "wx/dcmemory.h"
  39     #include "wx/bitmap.h"
  40     #include "wx/icon.h"
  41 #endif
  42
  43 #include "wx/msw/private.h"
  44 #include "wx/log.h"
  45
  46 #include "wx/msw/dib.h"
  47 #include "wx/image.h"
  48
  49 // missing from mingw32 header
  50 #ifndef CLR_INVALID
  51     #define CLR_INVALID ((COLORREF)-1)
  52 #endif // no CLR_INVALID
  53
  54 // ----------------------------------------------------------------------------
  55 // macros
  56 // ----------------------------------------------------------------------------
  57
  58 IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
  59 IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
  60
  61 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject)
  62
  63 // ============================================================================
  64 // implementation
  65 // ============================================================================
  66
  67 // ----------------------------------------------------------------------------
  68 // wxBitmapRefData
  69 // ----------------------------------------------------------------------------
  70
  71 wxBitmapRefData::wxBitmapRefData()
  72 {
  73     m_quality = 0;
  74     m_selectedInto = NULL;
  75     m_numColors = 0;
  76     m_bitmapMask = NULL;
  77     m_hBitmap = (WXHBITMAP) NULL;
  78 }
  79
  80 void wxBitmapRefData::Free()
  81 {
  82     wxASSERT_MSG( !m_selectedInto,
  83                   wxT("deleting bitmap still selected into wxMemoryDC") );
  84
  85     if ( m_hBitmap)
  86     {
  87         if ( !::DeleteObject((HBITMAP)m_hBitmap) )
  88         {
  89             wxLogLastError(wxT("DeleteObject(hbitmap)"));
  90         }
  91     }
  92
  93     delete m_bitmapMask;
  94     m_bitmapMask = NULL;
  95 }
  96
  97 // ----------------------------------------------------------------------------
  98 // wxBitmap creation
  99 // ----------------------------------------------------------------------------
 100
 101 // this function should be called from all wxBitmap ctors
 102 void wxBitmap::Init()
 103 {
 104     // m_refData = NULL; done in the base class ctor
 105
 106     if ( wxTheBitmapList )
 107         wxTheBitmapList->AddBitmap(this);
 108 }
 109
 110 #ifdef __WIN32__
 111
 112 bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
 113 {
 114     // it may be either HICON or HCURSOR
 115     HICON hicon = (HICON)icon.GetHandle();
 116
 117     ICONINFO iconInfo;
 118     if ( !::GetIconInfo(hicon, &iconInfo) )
 119     {
 120         wxLogLastError(wxT("GetIconInfo"));
 121
 122         return FALSE;
 123     }
 124
 125     wxBitmapRefData *refData = new wxBitmapRefData;
 126     m_refData = refData;
 127
 128     int w = icon.GetWidth(),
 129         h = icon.GetHeight();
 130
 131     refData->m_width = w;
 132     refData->m_height = h;
 133     refData->m_depth = wxDisplayDepth();
 134
 135     refData->m_hBitmap = (WXHBITMAP)iconInfo.hbmColor;
 136
 137     // the mask returned by GetIconInfo() is inversed compared to the usual
 138     // wxWin convention
 139     refData->m_bitmapMask = new wxMask((WXHBITMAP)
 140                                         wxInvertMask(iconInfo.hbmMask, w, h));
 141
 142 #if WXWIN_COMPATIBILITY_2
 143     refData->m_ok = TRUE;
 144 #endif // WXWIN_COMPATIBILITY_2
 145
 146     return TRUE;
 147 }
 148
 149 #endif // Win32
 150
 151 bool wxBitmap::CopyFromCursor(const wxCursor& cursor)
 152 {
 153     UnRef();
 154
 155     if ( !cursor.Ok() )
 156         return FALSE;
 157
 158 #ifdef __WIN16__
 159     wxFAIL_MSG( _T("don't know how to convert cursor to bitmap") );
 160
 161     return FALSE;
 162 #else
 163     return CopyFromIconOrCursor(cursor);
 164 #endif // Win16
 165 }
 166
 167 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 168 {
 169     UnRef();
 170
 171     if ( !icon.Ok() )
 172         return FALSE;
 173
 174     // GetIconInfo() doesn't exist under Win16 and I don't know any other way
 175     // to create a bitmap from icon there - but using this way we won't have
 176     // the mask (FIXME)
 177 #ifdef __WIN16__
 178     int width = icon.GetWidth(),
 179         height = icon.GetHeight();
 180
 181     // copy the icon to the bitmap
 182     ScreenHDC hdcScreen;
 183     HDC hdc = ::CreateCompatibleDC(hdcScreen);
 184     HBITMAP hbitmap = ::CreateCompatibleBitmap(hdcScreen, width, height);
 185     HBITMAP hbmpOld = (HBITMAP)::SelectObject(hdc, hbitmap);
 186
 187     ::DrawIcon(hdc, 0, 0, GetHiconOf(icon));
 188
 189     ::SelectObject(hdc, hbmpOld);
 190     ::DeleteDC(hdc);
 191
 192     wxBitmapRefData *refData = new wxBitmapRefData;
 193     m_refData = refData;
 194
 195     refData->m_width = width;
 196     refData->m_height = height;
 197     refData->m_depth = wxDisplayDepth();
 198
 199     refData->m_hBitmap = (WXHBITMAP)hbitmap;
 200
 201 #if WXWIN_COMPATIBILITY_2
 202     refData->m_ok = TRUE;
 203 #endif // WXWIN_COMPATIBILITY_2
 204
 205     return TRUE;
 206 #else // Win32
 207     return CopyFromIconOrCursor(icon);
 208 #endif // Win16/Win32
 209 }
 210
 211 wxBitmap::~wxBitmap()
 212 {
 213     if (wxTheBitmapList)
 214         wxTheBitmapList->DeleteObject(this);
 215 }
 216
 217 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 218 {
 219     Init();
 220
 221     wxBitmapRefData *refData = new wxBitmapRefData;
 222     m_refData = refData;
 223
 224     refData->m_width = width;
 225     refData->m_height = height;
 226     refData->m_depth = depth;
 227     refData->m_numColors = 0;
 228     refData->m_selectedInto = NULL;
 229
 230     char *data;
 231     if ( depth == 1 )
 232     {
 233         // we assume that it is in XBM format which is not quite the same as
 234         // the format CreateBitmap() wants because the order of bytes in the
 235         // line is inversed!
 236         static const size_t bytesPerLine = (width + 7) / 8;
 237         static const size_t padding = bytesPerLine % 2;
 238         static const size_t len = height * ( padding + bytesPerLine );
 239         data = (char *)malloc(len);
 240         const char *src = bits;
 241         char *dst = data;
 242
 243         for ( int rows = 0; rows < height; rows++ )
 244         {
 245             for ( size_t cols = 0; cols < bytesPerLine; cols++ )
 246             {
 247                 unsigned char val = *src++;
 248                 unsigned char reversed = 0;
 249
 250                 for ( int bits = 0; bits < 8; bits++)
 251                 {
 252                     reversed <<= 1;
 253                     reversed |= (val & 0x01);
 254                     val >>= 1;
 255                 }
 256                 *dst++ = reversed;
 257             }
 258
 259             if ( padding )
 260                 *dst++ = 0;
 261         }
 262     }
 263     else
 264     {
 265         // bits should already be in Windows standard format
 266         data = (char *)bits;    // const_cast is harmless
 267     }
 268
 269     HBITMAP hbmp = ::CreateBitmap(width, height, 1, depth, data);
 270     if ( !hbmp )
 271     {
 272         wxLogLastError(wxT("CreateBitmap"));
 273     }
 274
 275     if ( data != bits )
 276     {
 277         free(data);
 278     }
 279
 280     SetHBITMAP((WXHBITMAP)hbmp);
 281 }
 282
 283 // Create from XPM data
 284 bool wxBitmap::CreateFromXpm(const char **data)
 285 {
 286     Init();
 287
 288     return Create((void *)data, wxBITMAP_TYPE_XPM_DATA, 0, 0, 0);
 289 }
 290
 291 wxBitmap::wxBitmap(int w, int h, int d)
 292 {
 293     Init();
 294
 295     (void)Create(w, h, d);
 296 }
 297
 298 wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
 299 {
 300     Init();
 301
 302     (void)Create(data, type, width, height, depth);
 303 }
 304
 305 wxBitmap::wxBitmap(const wxString& filename, long type)
 306 {
 307     Init();
 308
 309     LoadFile(filename, (int)type);
 310 }
 311
 312 bool wxBitmap::Create(int w, int h, int d)
 313 {
 314     UnRef();
 315
 316     m_refData = new wxBitmapRefData;
 317
 318     GetBitmapData()->m_width = w;
 319     GetBitmapData()->m_height = h;
 320     GetBitmapData()->m_depth = d;
 321
 322     HBITMAP hbmp;
 323
 324     if ( d > 0 )
 325     {
 326         hbmp = ::CreateBitmap(w, h, 1, d, NULL);
 327         if ( !hbmp )
 328         {
 329             wxLogLastError(wxT("CreateBitmap"));
 330         }
 331     }
 332     else
 333     {
 334         ScreenHDC dc;
 335         hbmp = ::CreateCompatibleBitmap(dc, w, h);
 336         if ( !hbmp )
 337         {
 338             wxLogLastError(wxT("CreateCompatibleBitmap"));
 339         }
 340
 341         GetBitmapData()->m_depth = wxDisplayDepth();
 342     }
 343
 344     SetHBITMAP((WXHBITMAP)hbmp);
 345
 346 #if WXWIN_COMPATIBILITY_2
 347     GetBitmapData()->m_ok = hbmp != 0;
 348 #endif // WXWIN_COMPATIBILITY_2
 349
 350     return Ok();
 351 }
 352
 353 bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
 354 {
 355     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
 356
 357     m_refData = new wxBitmapRefData();
 358
 359     // sizeLimit is the MS upper limit for the DIB size
 360 #ifdef  WIN32
 361     int sizeLimit = 1024*768*3;
 362 #else
 363     int sizeLimit = 0x7fff ;
 364 #endif
 365
 366     // width and height of the device-dependent bitmap
 367     int width = image.GetWidth();
 368     int bmpHeight = image.GetHeight();
 369
 370     // calc the number of bytes per scanline and padding
 371     int bytePerLine = width*3;
 372     int sizeDWORD = sizeof( DWORD );
 373     int lineBoundary = bytePerLine % sizeDWORD;
 374     int padding = 0;
 375     if( lineBoundary > 0 )
 376     {
 377         padding = sizeDWORD - lineBoundary;
 378         bytePerLine += padding;
 379     }
 380     // calc the number of DIBs and heights of DIBs
 381     int numDIB = 1;
 382     int hRemain = 0;
 383     int height = sizeLimit/bytePerLine;
 384     if( height >= bmpHeight )
 385         height = bmpHeight;
 386     else
 387     {
 388         numDIB =  bmpHeight / height;
 389         hRemain = bmpHeight % height;
 390         if( hRemain >0 )  numDIB++;
 391     }
 392
 393     // set bitmap parameters
 394     wxCHECK_MSG( Ok(), FALSE, wxT("invalid image") );
 395     SetWidth( width );
 396     SetHeight( bmpHeight );
 397     if (depth == -1) depth = wxDisplayDepth();
 398     SetDepth( depth );
 399
 400     // create a DIB header
 401     int headersize = sizeof(BITMAPINFOHEADER);
 402     BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
 403     wxCHECK_MSG( lpDIBh, FALSE, wxT("could not allocate memory for DIB header") );
 404     // Fill in the DIB header
 405     lpDIBh->bmiHeader.biSize = headersize;
 406     lpDIBh->bmiHeader.biWidth = (DWORD)width;
 407     lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 408     lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 409     //   the general formula for biSizeImage:
 410     //      ( ( ( ((DWORD)width*24) +31 ) & ~31 ) >> 3 ) * height;
 411     lpDIBh->bmiHeader.biPlanes = 1;
 412     lpDIBh->bmiHeader.biBitCount = 24;
 413     lpDIBh->bmiHeader.biCompression = BI_RGB;
 414     lpDIBh->bmiHeader.biClrUsed = 0;
 415     // These seem not really needed for our purpose here.
 416     lpDIBh->bmiHeader.biClrImportant = 0;
 417     lpDIBh->bmiHeader.biXPelsPerMeter = 0;
 418     lpDIBh->bmiHeader.biYPelsPerMeter = 0;
 419     // memory for DIB data
 420     unsigned char *lpBits;
 421     lpBits = (unsigned char *)malloc( lpDIBh->bmiHeader.biSizeImage );
 422     if( !lpBits )
 423     {
 424         wxFAIL_MSG( wxT("could not allocate memory for DIB") );
 425         free( lpDIBh );
 426         return FALSE;
 427     }
 428
 429     // create and set the device-dependent bitmap
 430     HDC hdc = ::GetDC(NULL);
 431     HDC memdc = ::CreateCompatibleDC( hdc );
 432     HBITMAP hbitmap;
 433     hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight );
 434     ::SelectObject( memdc, hbitmap);
 435
 436     HPALETTE hOldPalette = 0;
 437     if (image.GetPalette().Ok())
 438     {
 439         hOldPalette = ::SelectPalette(memdc, (HPALETTE) image.GetPalette().GetHPALETTE(), FALSE);
 440         ::RealizePalette(memdc);
 441     }
 442
 443     // copy image data into DIB data and then into DDB (in a loop)
 444     unsigned char *data = image.GetData();
 445     int i, j, n;
 446     int origin = 0;
 447     unsigned char *ptdata = data;
 448     unsigned char *ptbits;
 449
 450     for( n=0; n<numDIB; n++ )
 451     {
 452         if( numDIB > 1 && n == numDIB-1 && hRemain > 0 )
 453         {
 454             // redefine height and size of the (possibly) last smaller DIB
 455             // memory is not reallocated
 456             height = hRemain;
 457             lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 458             lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 459         }
 460         ptbits = lpBits;
 461
 462         for( j=0; j<height; j++ )
 463         {
 464             for( i=0; i<width; i++ )
 465             {
 466                 *(ptbits++) = *(ptdata+2);
 467                 *(ptbits++) = *(ptdata+1);
 468                 *(ptbits++) = *(ptdata  );
 469                 ptdata += 3;
 470             }
 471             for( i=0; i< padding; i++ )   *(ptbits++) = 0;
 472         }
 473         ::StretchDIBits( memdc, 0, origin, width, height,\
 474             0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
 475         origin += height;
 476         // if numDIB = 1,  lines below can also be used
 477         //    hbitmap = CreateDIBitmap( hdc, &(lpDIBh->bmiHeader), CBM_INIT, lpBits, lpDIBh, DIB_RGB_COLORS );
 478         // The above line is equivalent to the following two lines.
 479         //    hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
 480         //    ::SetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS);
 481         // or the following lines
 482         //    hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
 483         //    HDC memdc = ::CreateCompatibleDC( hdc );
 484         //    ::SelectObject( memdc, hbitmap);
 485         //    ::SetDIBitsToDevice( memdc, 0, 0, width, height,
 486         //            0, 0, 0, height, (void *)lpBits, lpDIBh, DIB_RGB_COLORS);
 487         //    ::SelectObject( memdc, 0 );
 488         //    ::DeleteDC( memdc );
 489     }
 490     SetHBITMAP( (WXHBITMAP) hbitmap );
 491
 492     if (hOldPalette)
 493         SelectPalette(memdc, hOldPalette, FALSE);
 494
 495     // similarly, created an mono-bitmap for the possible mask
 496     if( image.HasMask() )
 497     {
 498         hbitmap = ::CreateBitmap( (WORD)width, (WORD)bmpHeight, 1, 1, NULL );
 499         HGDIOBJ hbmpOld = ::SelectObject( memdc, hbitmap);
 500         if( numDIB == 1 )   height = bmpHeight;
 501         else                height = sizeLimit/bytePerLine;
 502         lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 503         lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 504         origin = 0;
 505         unsigned char r = image.GetMaskRed();
 506         unsigned char g = image.GetMaskGreen();
 507         unsigned char b = image.GetMaskBlue();
 508         unsigned char zero = 0, one = 255;
 509         ptdata = data;
 510         for( n=0; n<numDIB; n++ )
 511         {
 512             if( numDIB > 1 && n == numDIB - 1 && hRemain > 0 )
 513             {
 514                 // redefine height and size of the (possibly) last smaller DIB
 515                 // memory is not reallocated
 516                 height = hRemain;
 517                 lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 518                 lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 519             }
 520             ptbits = lpBits;
 521             for( int j=0; j<height; j++ )
 522             {
 523                 for(i=0; i<width; i++ )
 524                 {
 525                     // was causing a code gen bug in cw : if( ( cr !=r) || (cg!=g) || (cb!=b) )
 526                     unsigned char cr = (*(ptdata++)) ;
 527                     unsigned char cg = (*(ptdata++)) ;
 528                     unsigned char cb = (*(ptdata++)) ;
 529
 530                     if( ( cr !=r) || (cg!=g) || (cb!=b) )
 531                     {
 532                         *(ptbits++) = one;
 533                         *(ptbits++) = one;
 534                         *(ptbits++) = one;
 535                     }
 536                     else
 537                     {
 538                         *(ptbits++) = zero;
 539                         *(ptbits++) = zero;
 540                         *(ptbits++) = zero;
 541                     }
 542                 }
 543                 for( i=0; i< padding; i++ )   *(ptbits++) = zero;
 544             }
 545             ::StretchDIBits( memdc, 0, origin, width, height,\
 546                 0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
 547             origin += height;
 548         }
 549         // create a wxMask object
 550         wxMask *mask = new wxMask();
 551         mask->SetMaskBitmap( (WXHBITMAP) hbitmap );
 552         SetMask( mask );
 553         // It will be deleted when the wxBitmap object is deleted (as of 01/1999)
 554         /* The following can also be used but is slow to run
 555         wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue());
 556         wxMask *mask = new wxMask( *this, colour );
 557         SetMask( mask );
 558         */
 559
 560         ::SelectObject( memdc, hbmpOld );
 561     }
 562
 563     // free allocated resources
 564     ::DeleteDC( memdc );
 565     ::ReleaseDC(NULL, hdc);
 566     free(lpDIBh);
 567     free(lpBits);
 568
 569 #if WXWIN_COMPATIBILITY_2
 570     // check the wxBitmap object
 571     GetBitmapData()->SetOk();
 572 #endif // WXWIN_COMPATIBILITY_2
 573
 574     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 575
 576     return TRUE;
 577 }
 578
 579 wxImage wxBitmap::ConvertToImage() const
 580 {
 581     wxImage image;
 582
 583     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 584
 585     // create an wxImage object
 586     int width = GetWidth();
 587     int height = GetHeight();
 588     image.Create( width, height );
 589     unsigned char *data = image.GetData();
 590     if( !data )
 591     {
 592         wxFAIL_MSG( wxT("could not allocate data for image") );
 593         return wxNullImage;
 594     }
 595
 596     // calc the number of bytes per scanline and padding in the DIB
 597     int bytePerLine = width*3;
 598     int sizeDWORD = sizeof( DWORD );
 599     int lineBoundary =  bytePerLine % sizeDWORD;
 600     int padding = 0;
 601     if( lineBoundary > 0 )
 602     {
 603         padding = sizeDWORD - lineBoundary;
 604         bytePerLine += padding;
 605     }
 606
 607     // create a DIB header
 608     int headersize = sizeof(BITMAPINFOHEADER);
 609     BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
 610     if( !lpDIBh )
 611     {
 612         wxFAIL_MSG( wxT("could not allocate data for DIB header") );
 613         free( data );
 614         return wxNullImage;
 615     }
 616     // Fill in the DIB header
 617     lpDIBh->bmiHeader.biSize = headersize;
 618     lpDIBh->bmiHeader.biWidth = width;
 619     lpDIBh->bmiHeader.biHeight = -height;
 620     lpDIBh->bmiHeader.biSizeImage = bytePerLine * height;
 621     lpDIBh->bmiHeader.biPlanes = 1;
 622     lpDIBh->bmiHeader.biBitCount = 24;
 623     lpDIBh->bmiHeader.biCompression = BI_RGB;
 624     lpDIBh->bmiHeader.biClrUsed = 0;
 625     // These seem not really needed for our purpose here.
 626     lpDIBh->bmiHeader.biClrImportant = 0;
 627     lpDIBh->bmiHeader.biXPelsPerMeter = 0;
 628     lpDIBh->bmiHeader.biYPelsPerMeter = 0;
 629     // memory for DIB data
 630     unsigned char *lpBits;
 631     lpBits = (unsigned char *) malloc( lpDIBh->bmiHeader.biSizeImage );
 632     if( !lpBits )
 633     {
 634         wxFAIL_MSG( wxT("could not allocate data for DIB") );
 635         free( data );
 636         free( lpDIBh );
 637         return wxNullImage;
 638     }
 639
 640     // copy data from the device-dependent bitmap to the DIB
 641     HDC hdc = ::GetDC(NULL);
 642     HBITMAP hbitmap;
 643     hbitmap = (HBITMAP) GetHBITMAP();
 644     ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
 645
 646     // copy DIB data into the wxImage object
 647     int i, j;
 648     unsigned char *ptdata = data;
 649     unsigned char *ptbits = lpBits;
 650     for( i=0; i<height; i++ )
 651     {
 652         for( j=0; j<width; j++ )
 653         {
 654             *(ptdata++) = *(ptbits+2);
 655             *(ptdata++) = *(ptbits+1);
 656             *(ptdata++) = *(ptbits  );
 657             ptbits += 3;
 658         }
 659         ptbits += padding;
 660     }
 661
 662     // similarly, set data according to the possible mask bitmap
 663     if( GetMask() && GetMask()->GetMaskBitmap() )
 664     {
 665         hbitmap = (HBITMAP) GetMask()->GetMaskBitmap();
 666         // memory DC created, color set, data copied, and memory DC deleted
 667         HDC memdc = ::CreateCompatibleDC( hdc );
 668         ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
 669         ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
 670         ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
 671         ::DeleteDC( memdc );
 672         // background color set to RGB(16,16,16) in consistent with wxGTK
 673         unsigned char r=16, g=16, b=16;
 674         ptdata = data;
 675         ptbits = lpBits;
 676         for( i=0; i<height; i++ )
 677         {
 678             for( j=0; j<width; j++ )
 679             {
 680                 if( *ptbits != 0 )
 681                     ptdata += 3;
 682                 else
 683                 {
 684                     *(ptdata++)  = r;
 685                     *(ptdata++)  = g;
 686                     *(ptdata++)  = b;
 687                 }
 688                 ptbits += 3;
 689             }
 690             ptbits += padding;
 691         }
 692         image.SetMaskColour( r, g, b );
 693         image.SetMask( TRUE );
 694     }
 695     else
 696     {
 697         image.SetMask( FALSE );
 698     }
 699     // free allocated resources
 700     ::ReleaseDC(NULL, hdc);
 701     free(lpDIBh);
 702     free(lpBits);
 703
 704     return image;
 705 }
 706
 707 bool wxBitmap::LoadFile(const wxString& filename, long type)
 708 {
 709     UnRef();
 710
 711     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 712
 713     if ( handler )
 714     {
 715         m_refData = new wxBitmapRefData;
 716
 717         return handler->LoadFile(this, filename, type, -1, -1);
 718     }
 719     else
 720     {
 721         wxImage image;
 722         if ( !image.LoadFile( filename, type ) || !image.Ok() )
 723             return FALSE;
 724
 725         *this = image.ConvertToBitmap();
 726
 727         return TRUE;
 728     }
 729 }
 730
 731 bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
 732 {
 733     UnRef();
 734
 735     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 736
 737     if ( !handler )
 738     {
 739         wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %d defined."), type);
 740
 741         return FALSE;
 742     }
 743
 744     m_refData = new wxBitmapRefData;
 745
 746     return handler->Create(this, data, type, width, height, depth);
 747 }
 748
 749 bool wxBitmap::SaveFile(const wxString& filename, int type, const wxPalette *palette)
 750 {
 751     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 752
 753     if ( handler )
 754     {
 755         return handler->SaveFile(this, filename, type, palette);
 756     }
 757     else
 758     {
 759         // FIXME what about palette? shouldn't we use it?
 760         wxImage image( *this );
 761         if (!image.Ok())
 762             return FALSE;
 763
 764         return image.SaveFile( filename, type );
 765     }
 766 }
 767
 768 // ----------------------------------------------------------------------------
 769 // sub bitmap extraction
 770 // ----------------------------------------------------------------------------
 771
 772 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 773 {
 774     wxCHECK_MSG( Ok() &&
 775                  (rect.x >= 0) && (rect.y >= 0) &&
 776                  (rect.x+rect.width <= GetWidth()) &&
 777                  (rect.y+rect.height <= GetHeight()),
 778                  wxNullBitmap, wxT("Invalid bitmap or bitmap region") );
 779
 780     wxBitmap ret( rect.width, rect.height, GetDepth() );
 781     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 782
 783     // copy bitmap data
 784     HDC dcSrc = ::CreateCompatibleDC(NULL);
 785     HDC dcDst = ::CreateCompatibleDC(NULL);
 786     SelectObject(dcSrc, (HBITMAP) GetHBITMAP());
 787     SelectObject(dcDst, (HBITMAP) ret.GetHBITMAP());
 788     BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
 789
 790     // copy mask if there is one
 791     if (GetMask())
 792     {
 793         HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0);
 794
 795         SelectObject(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap());
 796         SelectObject(dcDst, (HBITMAP) hbmpMask);
 797         BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
 798
 799         wxMask *mask = new wxMask((WXHBITMAP) hbmpMask);
 800         ret.SetMask(mask);
 801     }
 802
 803     SelectObject(dcDst, NULL);
 804     SelectObject(dcSrc, NULL);
 805     DeleteDC(dcDst);
 806     DeleteDC(dcSrc);
 807
 808     return ret;
 809 }
 810
 811 // ----------------------------------------------------------------------------
 812 // wxBitmap accessors
 813 // ----------------------------------------------------------------------------
 814
 815 void wxBitmap::SetQuality(int q)
 816 {
 817     EnsureHasData();
 818
 819     GetBitmapData()->m_quality = q;
 820 }
 821
 822 #if WXWIN_COMPATIBILITY_2
 823 void wxBitmap::SetOk(bool isOk)
 824 {
 825     EnsureHasData();
 826
 827     GetBitmapData()->m_ok = isOk;
 828 }
 829 #endif // WXWIN_COMPATIBILITY_2
 830
 831 void wxBitmap::SetPalette(const wxPalette& palette)
 832 {
 833     EnsureHasData();
 834
 835     GetBitmapData()->m_bitmapPalette = palette;
 836 }
 837
 838 void wxBitmap::SetMask(wxMask *mask)
 839 {
 840     EnsureHasData();
 841
 842     GetBitmapData()->m_bitmapMask = mask;
 843 }
 844
 845 // Creates a bitmap that matches the device context, from
 846 // an arbitray bitmap. At present, the original bitmap must have an
 847 // associated palette. TODO: use a default palette if no palette exists.
 848 // Contributed by Frederic Villeneuve <frederic.villeneuve@natinst.com>
 849 wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const
 850 {
 851     wxMemoryDC      memDC;
 852     wxBitmap        tmpBitmap(GetWidth(), GetHeight(), dc.GetDepth());
 853     HPALETTE        hPal = (HPALETTE) NULL;
 854     LPBITMAPINFO    lpDib;
 855     void            *lpBits = (void*) NULL;
 856
 857     if( GetPalette() && GetPalette()->Ok() )
 858     {
 859         tmpBitmap.SetPalette(*GetPalette());
 860         memDC.SelectObject(tmpBitmap);
 861         memDC.SetPalette(*GetPalette());
 862         hPal = (HPALETTE)GetPalette()->GetHPALETTE();
 863     }
 864     else
 865     {
 866         hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE);
 867         wxPalette palette;
 868         palette.SetHPALETTE( (WXHPALETTE)hPal );
 869         tmpBitmap.SetPalette( palette );
 870         memDC.SelectObject(tmpBitmap);
 871         memDC.SetPalette( palette );
 872     }
 873
 874     // set the height negative because in a DIB the order of the lines is
 875     // reversed
 876     if ( !wxCreateDIB(GetWidth(), -GetHeight(), GetDepth(), hPal, &lpDib) )
 877     {
 878         return wxNullBitmap;
 879     }
 880
 881     lpBits = malloc(lpDib->bmiHeader.biSizeImage);
 882
 883     ::GetBitmapBits(GetHbitmap(), lpDib->bmiHeader.biSizeImage, lpBits);
 884
 885     ::SetDIBitsToDevice(GetHdcOf(memDC), 0, 0,
 886                         GetWidth(), GetHeight(),
 887                         0, 0, 0, GetHeight(),
 888                         lpBits, lpDib, DIB_RGB_COLORS);
 889
 890     free(lpBits);
 891
 892     wxFreeDIB(lpDib);
 893
 894     return tmpBitmap;
 895 }
 896
 897 // ----------------------------------------------------------------------------
 898 // wxMask
 899 // ----------------------------------------------------------------------------
 900
 901 wxMask::wxMask()
 902 {
 903     m_maskBitmap = 0;
 904 }
 905
 906 // Construct a mask from a bitmap and a colour indicating
 907 // the transparent area
 908 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
 909 {
 910     m_maskBitmap = 0;
 911     Create(bitmap, colour);
 912 }
 913
 914 // Construct a mask from a bitmap and a palette index indicating
 915 // the transparent area
 916 wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
 917 {
 918     m_maskBitmap = 0;
 919     Create(bitmap, paletteIndex);
 920 }
 921
 922 // Construct a mask from a mono bitmap (copies the bitmap).
 923 wxMask::wxMask(const wxBitmap& bitmap)
 924 {
 925     m_maskBitmap = 0;
 926     Create(bitmap);
 927 }
 928
 929 wxMask::~wxMask()
 930 {
 931     if ( m_maskBitmap )
 932         ::DeleteObject((HBITMAP) m_maskBitmap);
 933 }
 934
 935 // Create a mask from a mono bitmap (copies the bitmap).
 936 bool wxMask::Create(const wxBitmap& bitmap)
 937 {
 938     wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, FALSE,
 939                  _T("can't create mask from invalid or not monochrome bitmap") );
 940
 941     if ( m_maskBitmap )
 942     {
 943         ::DeleteObject((HBITMAP) m_maskBitmap);
 944         m_maskBitmap = 0;
 945     }
 946
 947     m_maskBitmap = (WXHBITMAP) CreateBitmap(
 948                                             bitmap.GetWidth(),
 949                                             bitmap.GetHeight(),
 950                                             1, 1, 0
 951                                            );
 952     HDC srcDC = CreateCompatibleDC(0);
 953     SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
 954     HDC destDC = CreateCompatibleDC(0);
 955     SelectObject(destDC, (HBITMAP) m_maskBitmap);
 956     BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY);
 957     SelectObject(srcDC, 0);
 958     DeleteDC(srcDC);
 959     SelectObject(destDC, 0);
 960     DeleteDC(destDC);
 961     return TRUE;
 962 }
 963
 964 // Create a mask from a bitmap and a palette index indicating
 965 // the transparent area
 966 bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
 967 {
 968     if ( m_maskBitmap )
 969     {
 970         ::DeleteObject((HBITMAP) m_maskBitmap);
 971         m_maskBitmap = 0;
 972     }
 973     if (bitmap.Ok() && bitmap.GetPalette()->Ok())
 974     {
 975         unsigned char red, green, blue;
 976         if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue))
 977         {
 978             wxColour transparentColour(red, green, blue);
 979             return Create(bitmap, transparentColour);
 980         }
 981     }
 982     return FALSE;
 983 }
 984
 985 // Create a mask from a bitmap and a colour indicating
 986 // the transparent area
 987 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
 988 {
 989     wxCHECK_MSG( bitmap.Ok(), FALSE, _T("invalid bitmap in wxMask::Create") );
 990
 991     if ( m_maskBitmap )
 992     {
 993         ::DeleteObject((HBITMAP) m_maskBitmap);
 994         m_maskBitmap = 0;
 995     }
 996
 997     int width = bitmap.GetWidth(),
 998         height = bitmap.GetHeight();
 999
1000     // scan the bitmap for the transparent colour and set the corresponding
1001     // pixels in the mask to BLACK and the rest to WHITE
1002     COLORREF maskColour = wxColourToRGB(colour);
1003     m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0);
1004
1005     HDC srcDC = ::CreateCompatibleDC(NULL);
1006     HDC destDC = ::CreateCompatibleDC(NULL);
1007     if ( !srcDC || !destDC )
1008     {
1009         wxLogLastError(wxT("CreateCompatibleDC"));
1010     }
1011
1012     bool ok = TRUE;
1013
1014     HGDIOBJ hbmpSrcOld = ::SelectObject(srcDC, GetHbitmapOf(bitmap));
1015     if ( !hbmpSrcOld )
1016     {
1017         wxLogLastError(wxT("SelectObject"));
1018
1019         ok = FALSE;
1020     }
1021
1022     HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap);
1023     if ( !hbmpDstOld )
1024     {
1025         wxLogLastError(wxT("SelectObject"));
1026
1027         ok = FALSE;
1028     }
1029
1030     // this is not very efficient, but I can't think of a better way of doing
1031     // it
1032     for ( int w = 0; ok && (w < width); w++ )
1033     {
1034         for ( int h = 0; ok && (h < height); h++ )
1035         {
1036             COLORREF col = GetPixel(srcDC, w, h);
1037             if ( col == CLR_INVALID )
1038             {
1039                 wxLogLastError(wxT("GetPixel"));
1040
1041                 // doesn't make sense to continue
1042                 ok = FALSE;
1043
1044                 break;
1045             }
1046
1047             if ( col == maskColour )
1048             {
1049                 ::SetPixel(destDC, w, h, RGB(0, 0, 0));
1050             }
1051             else
1052             {
1053                 ::SetPixel(destDC, w, h, RGB(255, 255, 255));
1054             }
1055         }
1056     }
1057
1058     ::SelectObject(srcDC, hbmpSrcOld);
1059     ::DeleteDC(srcDC);
1060     ::SelectObject(destDC, hbmpDstOld);
1061     ::DeleteDC(destDC);
1062
1063     return ok;
1064 }
1065
1066 // ----------------------------------------------------------------------------
1067 // wxBitmapHandler
1068 // ----------------------------------------------------------------------------
1069
1070 bool wxBitmapHandler::Create(wxGDIImage *image,
1071                              void *data,
1072                              long flags,
1073                              int width, int height, int depth)
1074 {
1075     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1076
1077     return bitmap ? Create(bitmap, data, flags, width, height, depth) : FALSE;
1078 }
1079
1080 bool wxBitmapHandler::Load(wxGDIImage *image,
1081                            const wxString& name,
1082                            long flags,
1083                            int width, int height)
1084 {
1085     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1086
1087     return bitmap ? LoadFile(bitmap, name, flags, width, height) : FALSE;
1088 }
1089
1090 bool wxBitmapHandler::Save(wxGDIImage *image,
1091                            const wxString& name,
1092                            int type)
1093 {
1094     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1095
1096     return bitmap ? SaveFile(bitmap, name, type) : FALSE;
1097 }
1098
1099 bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
1100                              void *WXUNUSED(data),
1101                              long WXUNUSED(type),
1102                              int WXUNUSED(width),
1103                              int WXUNUSED(height),
1104                              int WXUNUSED(depth))
1105 {
1106     return FALSE;
1107 }
1108
1109 bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
1110                                const wxString& WXUNUSED(name),
1111                                long WXUNUSED(type),
1112                                int WXUNUSED(desiredWidth),
1113                                int WXUNUSED(desiredHeight))
1114 {
1115     return FALSE;
1116 }
1117
1118 bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
1119                                const wxString& WXUNUSED(name),
1120                                int WXUNUSED(type),
1121                                const wxPalette *WXUNUSED(palette))
1122 {
1123     return FALSE;
1124 }
1125
1126 // ----------------------------------------------------------------------------
1127 // DIB functions
1128 // ----------------------------------------------------------------------------
1129
1130 bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
1131                  HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
1132 {
1133    unsigned long   i, headerSize;
1134    LPBITMAPINFO    lpDIBheader = NULL;
1135    LPPALETTEENTRY  lpPe = NULL;
1136
1137
1138    // Allocate space for a DIB header
1139    headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
1140    lpDIBheader = (BITMAPINFO *) malloc(headerSize);
1141    lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));
1142
1143    GetPaletteEntries(hPal, 0, 256, lpPe);
1144
1145    memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER));
1146
1147    // Fill in the static parts of the DIB header
1148    lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
1149    lpDIBheader->bmiHeader.biWidth = xSize;
1150    lpDIBheader->bmiHeader.biHeight = ySize;
1151    lpDIBheader->bmiHeader.biPlanes = 1;
1152
1153    // this value must be 1, 4, 8 or 24 so PixelDepth can only be
1154    lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel);
1155    lpDIBheader->bmiHeader.biCompression = BI_RGB;
1156    lpDIBheader->bmiHeader.biSizeImage = xSize * abs(ySize) * bitsPerPixel >> 3;
1157    lpDIBheader->bmiHeader.biClrUsed = 256;
1158
1159
1160    // Initialize the DIB palette
1161    for (i = 0; i < 256; i++) {
1162       lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags;
1163       lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed;
1164       lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen;
1165       lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue;
1166    }
1167
1168    *lpDIBHeader = lpDIBheader;
1169
1170    return TRUE;
1171 }
1172
1173 void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
1174 {
1175     free(lpDIBHeader);
1176 }
1177
1178 // ----------------------------------------------------------------------------
1179 // other helper functions
1180 // ----------------------------------------------------------------------------
1181
1182 extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
1183 {
1184     wxCHECK_MSG( hbmpMask, 0, _T("invalid bitmap in wxInvertMask") );
1185
1186     // get width/height from the bitmap if not given
1187     if ( !w || !h )
1188     {
1189         BITMAP bm;
1190         ::GetObject(hbmpMask, sizeof(BITMAP), (LPVOID)&bm);
1191         w = bm.bmWidth;
1192         h = bm.bmHeight;
1193     }
1194
1195     HDC hdcSrc = ::CreateCompatibleDC(NULL);
1196     HDC hdcDst = ::CreateCompatibleDC(NULL);
1197     if ( !hdcSrc || !hdcDst )
1198     {
1199         wxLogLastError(wxT("CreateCompatibleDC"));
1200     }
1201
1202     HBITMAP hbmpInvMask = ::CreateBitmap(w, h, 1, 1, 0);
1203     if ( !hbmpInvMask )
1204     {
1205         wxLogLastError(wxT("CreateBitmap"));
1206     }
1207
1208     ::SelectObject(hdcSrc, hbmpMask);
1209     ::SelectObject(hdcDst, hbmpInvMask);
1210     if ( !::BitBlt(hdcDst, 0, 0, w, h,
1211                    hdcSrc, 0, 0,
1212                    NOTSRCCOPY) )
1213     {
1214         wxLogLastError(wxT("BitBlt"));
1215     }
1216
1217     ::DeleteDC(hdcSrc);
1218     ::DeleteDC(hdcDst);
1219
1220     return hbmpInvMask;
1221 }