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 #if !defined(__WXMICROWIN__)
  47 #include "wx/msw/dib.h"
  48 #endif
  49
  50 #include "wx/image.h"
  51 #include "wx/xpmdecod.h"
  52
  53 // missing from mingw32 header
  54 #ifndef CLR_INVALID
  55     #define CLR_INVALID ((COLORREF)-1)
  56 #endif // no CLR_INVALID
  57
  58 // ----------------------------------------------------------------------------
  59 // macros
  60 // ----------------------------------------------------------------------------
  61
  62 IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
  63 IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
  64
  65 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject)
  66
  67 // ============================================================================
  68 // implementation
  69 // ============================================================================
  70
  71 // ----------------------------------------------------------------------------
  72 // wxBitmapRefData
  73 // ----------------------------------------------------------------------------
  74
  75 wxBitmapRefData::wxBitmapRefData()
  76 {
  77     m_quality = 0;
  78     m_selectedInto = NULL;
  79     m_numColors = 0;
  80     m_bitmapMask = NULL;
  81     m_hBitmap = (WXHBITMAP) NULL;
  82 }
  83
  84 void wxBitmapRefData::Free()
  85 {
  86     wxASSERT_MSG( !m_selectedInto,
  87                   wxT("deleting bitmap still selected into wxMemoryDC") );
  88
  89     if ( m_hBitmap)
  90     {
  91         if ( !::DeleteObject((HBITMAP)m_hBitmap) )
  92         {
  93             wxLogLastError(wxT("DeleteObject(hbitmap)"));
  94         }
  95     }
  96
  97     delete m_bitmapMask;
  98     m_bitmapMask = NULL;
  99 }
 100
 101 // ----------------------------------------------------------------------------
 102 // wxBitmap creation
 103 // ----------------------------------------------------------------------------
 104
 105 // this function should be called from all wxBitmap ctors
 106 void wxBitmap::Init()
 107 {
 108     // m_refData = NULL; done in the base class ctor
 109
 110     if ( wxTheBitmapList )
 111         wxTheBitmapList->AddBitmap(this);
 112 }
 113
 114 #ifdef __WIN32__
 115
 116 bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
 117 {
 118 #ifndef __WXMICROWIN__
 119     // it may be either HICON or HCURSOR
 120     HICON hicon = (HICON)icon.GetHandle();
 121
 122     ICONINFO iconInfo;
 123     if ( !::GetIconInfo(hicon, &iconInfo) )
 124     {
 125         wxLogLastError(wxT("GetIconInfo"));
 126
 127         return FALSE;
 128     }
 129
 130     wxBitmapRefData *refData = new wxBitmapRefData;
 131     m_refData = refData;
 132
 133     int w = icon.GetWidth(),
 134         h = icon.GetHeight();
 135
 136     refData->m_width = w;
 137     refData->m_height = h;
 138     refData->m_depth = wxDisplayDepth();
 139
 140     refData->m_hBitmap = (WXHBITMAP)iconInfo.hbmColor;
 141
 142     // the mask returned by GetIconInfo() is inversed compared to the usual
 143     // wxWin convention
 144     refData->m_bitmapMask = new wxMask((WXHBITMAP)
 145                                         wxInvertMask(iconInfo.hbmMask, w, h));
 146
 147 #if WXWIN_COMPATIBILITY_2
 148     refData->m_ok = TRUE;
 149 #endif // WXWIN_COMPATIBILITY_2
 150
 151     return TRUE;
 152 #else
 153     return FALSE;
 154 #endif
 155 }
 156
 157 #endif // Win32
 158
 159 bool wxBitmap::CopyFromCursor(const wxCursor& cursor)
 160 {
 161     UnRef();
 162
 163     if ( !cursor.Ok() )
 164         return FALSE;
 165
 166 #ifdef __WIN16__
 167     wxFAIL_MSG( _T("don't know how to convert cursor to bitmap") );
 168
 169     return FALSE;
 170 #else
 171     return CopyFromIconOrCursor(cursor);
 172 #endif // Win16
 173 }
 174
 175 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 176 {
 177     UnRef();
 178
 179     if ( !icon.Ok() )
 180         return FALSE;
 181
 182     // GetIconInfo() doesn't exist under Win16 and I don't know any other way
 183     // to create a bitmap from icon there - but using this way we won't have
 184     // the mask (FIXME)
 185 #ifdef __WIN16__
 186     int width = icon.GetWidth(),
 187         height = icon.GetHeight();
 188
 189     // copy the icon to the bitmap
 190     ScreenHDC hdcScreen;
 191     HDC hdc = ::CreateCompatibleDC(hdcScreen);
 192     HBITMAP hbitmap = ::CreateCompatibleBitmap(hdcScreen, width, height);
 193     HBITMAP hbmpOld = (HBITMAP)::SelectObject(hdc, hbitmap);
 194
 195     ::DrawIcon(hdc, 0, 0, GetHiconOf(icon));
 196
 197     ::SelectObject(hdc, hbmpOld);
 198     ::DeleteDC(hdc);
 199
 200     wxBitmapRefData *refData = new wxBitmapRefData;
 201     m_refData = refData;
 202
 203     refData->m_width = width;
 204     refData->m_height = height;
 205     refData->m_depth = wxDisplayDepth();
 206
 207     refData->m_hBitmap = (WXHBITMAP)hbitmap;
 208
 209 #if WXWIN_COMPATIBILITY_2
 210     refData->m_ok = TRUE;
 211 #endif // WXWIN_COMPATIBILITY_2
 212
 213     return TRUE;
 214 #else // Win32
 215     return CopyFromIconOrCursor(icon);
 216 #endif // Win16/Win32
 217 }
 218
 219 wxBitmap::~wxBitmap()
 220 {
 221     if (wxTheBitmapList)
 222         wxTheBitmapList->DeleteObject(this);
 223 }
 224
 225 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 226 {
 227     Init();
 228
 229 #ifndef __WXMICROWIN__
 230     wxBitmapRefData *refData = new wxBitmapRefData;
 231     m_refData = refData;
 232
 233     refData->m_width = width;
 234     refData->m_height = height;
 235     refData->m_depth = depth;
 236     refData->m_numColors = 0;
 237     refData->m_selectedInto = NULL;
 238
 239     char *data;
 240     if ( depth == 1 )
 241     {
 242         // we assume that it is in XBM format which is not quite the same as
 243         // the format CreateBitmap() wants because the order of bytes in the
 244         // line is inversed!
 245         const size_t bytesPerLine = (width + 7) / 8;
 246         const size_t padding = bytesPerLine % 2;
 247         const size_t len = height * ( padding + bytesPerLine );
 248         data = (char *)malloc(len);
 249         const char *src = bits;
 250         char *dst = data;
 251
 252         for ( int rows = 0; rows < height; rows++ )
 253         {
 254             for ( size_t cols = 0; cols < bytesPerLine; cols++ )
 255             {
 256                 unsigned char val = *src++;
 257                 unsigned char reversed = 0;
 258
 259                 for ( int bits = 0; bits < 8; bits++)
 260                 {
 261                     reversed <<= 1;
 262                     reversed |= (val & 0x01);
 263                     val >>= 1;
 264                 }
 265                 *dst++ = reversed;
 266             }
 267
 268             if ( padding )
 269                 *dst++ = 0;
 270         }
 271     }
 272     else
 273     {
 274         // bits should already be in Windows standard format
 275         data = (char *)bits;    // const_cast is harmless
 276     }
 277
 278     HBITMAP hbmp = ::CreateBitmap(width, height, 1, depth, data);
 279     if ( !hbmp )
 280     {
 281         wxLogLastError(wxT("CreateBitmap"));
 282     }
 283
 284     if ( data != bits )
 285     {
 286         free(data);
 287     }
 288
 289     SetHBITMAP((WXHBITMAP)hbmp);
 290 #endif
 291 }
 292
 293 // Create from XPM data
 294 bool wxBitmap::CreateFromXpm(const char **data)
 295 {
 296 #if wxUSE_IMAGE && wxUSE_XPM
 297     Init();
 298
 299     wxCHECK_MSG( data != NULL, FALSE, wxT("invalid bitmap data") )
 300
 301     wxXPMDecoder decoder;
 302     wxImage img = decoder.ReadData(data);
 303     wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") )
 304
 305     *this = wxBitmap(img);
 306     return TRUE;
 307 #else
 308     return FALSE;
 309 #endif
 310 }
 311
 312 wxBitmap::wxBitmap(int w, int h, int d)
 313 {
 314     Init();
 315
 316     (void)Create(w, h, d);
 317 }
 318
 319 wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
 320 {
 321     Init();
 322
 323     (void)Create(data, type, width, height, depth);
 324 }
 325
 326 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
 327 {
 328     Init();
 329
 330     LoadFile(filename, (int)type);
 331 }
 332
 333 bool wxBitmap::Create(int w, int h, int d)
 334 {
 335 #ifndef __WXMICROWIN__
 336     UnRef();
 337
 338     m_refData = new wxBitmapRefData;
 339
 340     GetBitmapData()->m_width = w;
 341     GetBitmapData()->m_height = h;
 342     GetBitmapData()->m_depth = d;
 343
 344     HBITMAP hbmp;
 345
 346     if ( d > 0 )
 347     {
 348         hbmp = ::CreateBitmap(w, h, 1, d, NULL);
 349         if ( !hbmp )
 350         {
 351             wxLogLastError(wxT("CreateBitmap"));
 352         }
 353     }
 354     else
 355     {
 356         ScreenHDC dc;
 357         hbmp = ::CreateCompatibleBitmap(dc, w, h);
 358         if ( !hbmp )
 359         {
 360             wxLogLastError(wxT("CreateCompatibleBitmap"));
 361         }
 362
 363         GetBitmapData()->m_depth = wxDisplayDepth();
 364     }
 365
 366     SetHBITMAP((WXHBITMAP)hbmp);
 367
 368 #if WXWIN_COMPATIBILITY_2
 369     GetBitmapData()->m_ok = hbmp != 0;
 370 #endif // WXWIN_COMPATIBILITY_2
 371     return Ok();
 372 #else
 373     return FALSE;
 374 #endif
 375 }
 376
 377 // ----------------------------------------------------------------------------
 378 // wxImage to/from conversions
 379 // ----------------------------------------------------------------------------
 380
 381 #if wxUSE_IMAGE
 382
 383 bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
 384 {
 385 #ifdef __WXMICROWIN__
 386     // TODO
 387     return FALSE;
 388 #else
 389     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
 390
 391     m_refData = new wxBitmapRefData();
 392
 393     // sizeLimit is the MS upper limit for the DIB size
 394 #ifdef  WIN32
 395     int sizeLimit = 1024*768*3;
 396 #else
 397     int sizeLimit = 0x7fff ;
 398 #endif
 399
 400     // width and height of the device-dependent bitmap
 401     int width = image.GetWidth();
 402     int bmpHeight = image.GetHeight();
 403
 404     // calc the number of bytes per scanline and padding
 405     int bytePerLine = width*3;
 406     int sizeDWORD = sizeof( DWORD );
 407     int lineBoundary = bytePerLine % sizeDWORD;
 408     int padding = 0;
 409     if( lineBoundary > 0 )
 410     {
 411         padding = sizeDWORD - lineBoundary;
 412         bytePerLine += padding;
 413     }
 414     // calc the number of DIBs and heights of DIBs
 415     int numDIB = 1;
 416     int hRemain = 0;
 417     int height = sizeLimit/bytePerLine;
 418     if( height >= bmpHeight )
 419         height = bmpHeight;
 420     else
 421     {
 422         numDIB =  bmpHeight / height;
 423         hRemain = bmpHeight % height;
 424         if( hRemain >0 )  numDIB++;
 425     }
 426
 427     // set bitmap parameters
 428     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") );
 429     SetWidth( width );
 430     SetHeight( bmpHeight );
 431     if (depth == -1) depth = wxDisplayDepth();
 432     SetDepth( depth );
 433
 434     // create a DIB header
 435     int headersize = sizeof(BITMAPINFOHEADER);
 436     BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
 437     wxCHECK_MSG( lpDIBh, FALSE, wxT("could not allocate memory for DIB header") );
 438     // Fill in the DIB header
 439     lpDIBh->bmiHeader.biSize = headersize;
 440     lpDIBh->bmiHeader.biWidth = (DWORD)width;
 441     lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 442     lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 443     //   the general formula for biSizeImage:
 444     //      ( ( ( ((DWORD)width*24) +31 ) & ~31 ) >> 3 ) * height;
 445     lpDIBh->bmiHeader.biPlanes = 1;
 446     lpDIBh->bmiHeader.biBitCount = 24;
 447     lpDIBh->bmiHeader.biCompression = BI_RGB;
 448     lpDIBh->bmiHeader.biClrUsed = 0;
 449     // These seem not really needed for our purpose here.
 450     lpDIBh->bmiHeader.biClrImportant = 0;
 451     lpDIBh->bmiHeader.biXPelsPerMeter = 0;
 452     lpDIBh->bmiHeader.biYPelsPerMeter = 0;
 453     // memory for DIB data
 454     unsigned char *lpBits;
 455     lpBits = (unsigned char *)malloc( lpDIBh->bmiHeader.biSizeImage );
 456     if( !lpBits )
 457     {
 458         wxFAIL_MSG( wxT("could not allocate memory for DIB") );
 459         free( lpDIBh );
 460         return FALSE;
 461     }
 462
 463     // create and set the device-dependent bitmap
 464     HDC hdc = ::GetDC(NULL);
 465     HDC memdc = ::CreateCompatibleDC( hdc );
 466     HBITMAP hbitmap;
 467     hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight );
 468     ::SelectObject( memdc, hbitmap);
 469
 470     HPALETTE hOldPalette = 0;
 471     if (image.GetPalette().Ok())
 472     {
 473         hOldPalette = ::SelectPalette(memdc, (HPALETTE) image.GetPalette().GetHPALETTE(), FALSE);
 474         ::RealizePalette(memdc);
 475     }
 476
 477     // copy image data into DIB data and then into DDB (in a loop)
 478     unsigned char *data = image.GetData();
 479     int i, j, n;
 480     int origin = 0;
 481     unsigned char *ptdata = data;
 482     unsigned char *ptbits;
 483
 484     for( n=0; n<numDIB; n++ )
 485     {
 486         if( numDIB > 1 && n == numDIB-1 && hRemain > 0 )
 487         {
 488             // redefine height and size of the (possibly) last smaller DIB
 489             // memory is not reallocated
 490             height = hRemain;
 491             lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 492             lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 493         }
 494         ptbits = lpBits;
 495
 496         for( j=0; j<height; j++ )
 497         {
 498             for( i=0; i<width; i++ )
 499             {
 500                 *(ptbits++) = *(ptdata+2);
 501                 *(ptbits++) = *(ptdata+1);
 502                 *(ptbits++) = *(ptdata  );
 503                 ptdata += 3;
 504             }
 505             for( i=0; i< padding; i++ )   *(ptbits++) = 0;
 506         }
 507         ::StretchDIBits( memdc, 0, origin, width, height,\
 508             0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
 509         origin += height;
 510         // if numDIB = 1,  lines below can also be used
 511         //    hbitmap = CreateDIBitmap( hdc, &(lpDIBh->bmiHeader), CBM_INIT, lpBits, lpDIBh, DIB_RGB_COLORS );
 512         // The above line is equivalent to the following two lines.
 513         //    hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
 514         //    ::SetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS);
 515         // or the following lines
 516         //    hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
 517         //    HDC memdc = ::CreateCompatibleDC( hdc );
 518         //    ::SelectObject( memdc, hbitmap);
 519         //    ::SetDIBitsToDevice( memdc, 0, 0, width, height,
 520         //            0, 0, 0, height, (void *)lpBits, lpDIBh, DIB_RGB_COLORS);
 521         //    ::SelectObject( memdc, 0 );
 522         //    ::DeleteDC( memdc );
 523     }
 524     SetHBITMAP( (WXHBITMAP) hbitmap );
 525
 526     if (hOldPalette)
 527         SelectPalette(memdc, hOldPalette, FALSE);
 528
 529     // similarly, created an mono-bitmap for the possible mask
 530     if( image.HasMask() )
 531     {
 532         hbitmap = ::CreateBitmap( (WORD)width, (WORD)bmpHeight, 1, 1, NULL );
 533         HGDIOBJ hbmpOld = ::SelectObject( memdc, hbitmap);
 534         if( numDIB == 1 )   height = bmpHeight;
 535         else                height = sizeLimit/bytePerLine;
 536         lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 537         lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 538         origin = 0;
 539         unsigned char r = image.GetMaskRed();
 540         unsigned char g = image.GetMaskGreen();
 541         unsigned char b = image.GetMaskBlue();
 542         unsigned char zero = 0, one = 255;
 543         ptdata = data;
 544         for( n=0; n<numDIB; n++ )
 545         {
 546             if( numDIB > 1 && n == numDIB - 1 && hRemain > 0 )
 547             {
 548                 // redefine height and size of the (possibly) last smaller DIB
 549                 // memory is not reallocated
 550                 height = hRemain;
 551                 lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 552                 lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 553             }
 554             ptbits = lpBits;
 555             for( int j=0; j<height; j++ )
 556             {
 557                 for(i=0; i<width; i++ )
 558                 {
 559                     // was causing a code gen bug in cw : if( ( cr !=r) || (cg!=g) || (cb!=b) )
 560                     unsigned char cr = (*(ptdata++)) ;
 561                     unsigned char cg = (*(ptdata++)) ;
 562                     unsigned char cb = (*(ptdata++)) ;
 563
 564                     if( ( cr !=r) || (cg!=g) || (cb!=b) )
 565                     {
 566                         *(ptbits++) = one;
 567                         *(ptbits++) = one;
 568                         *(ptbits++) = one;
 569                     }
 570                     else
 571                     {
 572                         *(ptbits++) = zero;
 573                         *(ptbits++) = zero;
 574                         *(ptbits++) = zero;
 575                     }
 576                 }
 577                 for( i=0; i< padding; i++ )   *(ptbits++) = zero;
 578             }
 579             ::StretchDIBits( memdc, 0, origin, width, height,\
 580                 0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
 581             origin += height;
 582         }
 583         // create a wxMask object
 584         wxMask *mask = new wxMask();
 585         mask->SetMaskBitmap( (WXHBITMAP) hbitmap );
 586         SetMask( mask );
 587         // It will be deleted when the wxBitmap object is deleted (as of 01/1999)
 588         /* The following can also be used but is slow to run
 589         wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue());
 590         wxMask *mask = new wxMask( *this, colour );
 591         SetMask( mask );
 592         */
 593
 594         ::SelectObject( memdc, hbmpOld );
 595     }
 596
 597     // free allocated resources
 598     ::DeleteDC( memdc );
 599     ::ReleaseDC(NULL, hdc);
 600     free(lpDIBh);
 601     free(lpBits);
 602
 603 #if WXWIN_COMPATIBILITY_2
 604     // check the wxBitmap object
 605     GetBitmapData()->SetOk();
 606 #endif // WXWIN_COMPATIBILITY_2
 607
 608     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 609
 610     return TRUE;
 611 #endif
 612 }
 613
 614 wxImage wxBitmap::ConvertToImage() const
 615 {
 616 #ifdef __WXMICROWIN__
 617     // TODO
 618     return wxImage();
 619 #else
 620     wxImage image;
 621
 622     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 623
 624     // create an wxImage object
 625     int width = GetWidth();
 626     int height = GetHeight();
 627     image.Create( width, height );
 628     unsigned char *data = image.GetData();
 629     if( !data )
 630     {
 631         wxFAIL_MSG( wxT("could not allocate data for image") );
 632         return wxNullImage;
 633     }
 634
 635     // calc the number of bytes per scanline and padding in the DIB
 636     int bytePerLine = width*3;
 637     int sizeDWORD = sizeof( DWORD );
 638     int lineBoundary =  bytePerLine % sizeDWORD;
 639     int padding = 0;
 640     if( lineBoundary > 0 )
 641     {
 642         padding = sizeDWORD - lineBoundary;
 643         bytePerLine += padding;
 644     }
 645
 646     // create a DIB header
 647     int headersize = sizeof(BITMAPINFOHEADER);
 648     BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
 649     if( !lpDIBh )
 650     {
 651         wxFAIL_MSG( wxT("could not allocate data for DIB header") );
 652         free( data );
 653         return wxNullImage;
 654     }
 655     // Fill in the DIB header
 656     lpDIBh->bmiHeader.biSize = headersize;
 657     lpDIBh->bmiHeader.biWidth = width;
 658     lpDIBh->bmiHeader.biHeight = -height;
 659     lpDIBh->bmiHeader.biSizeImage = bytePerLine * height;
 660     lpDIBh->bmiHeader.biPlanes = 1;
 661     lpDIBh->bmiHeader.biBitCount = 24;
 662     lpDIBh->bmiHeader.biCompression = BI_RGB;
 663     lpDIBh->bmiHeader.biClrUsed = 0;
 664     // These seem not really needed for our purpose here.
 665     lpDIBh->bmiHeader.biClrImportant = 0;
 666     lpDIBh->bmiHeader.biXPelsPerMeter = 0;
 667     lpDIBh->bmiHeader.biYPelsPerMeter = 0;
 668     // memory for DIB data
 669     unsigned char *lpBits;
 670     lpBits = (unsigned char *) malloc( lpDIBh->bmiHeader.biSizeImage );
 671     if( !lpBits )
 672     {
 673         wxFAIL_MSG( wxT("could not allocate data for DIB") );
 674         free( data );
 675         free( lpDIBh );
 676         return wxNullImage;
 677     }
 678
 679     // copy data from the device-dependent bitmap to the DIB
 680     HDC hdc = ::GetDC(NULL);
 681     HBITMAP hbitmap;
 682     hbitmap = (HBITMAP) GetHBITMAP();
 683     ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
 684
 685     // copy DIB data into the wxImage object
 686     int i, j;
 687     unsigned char *ptdata = data;
 688     unsigned char *ptbits = lpBits;
 689     for( i=0; i<height; i++ )
 690     {
 691         for( j=0; j<width; j++ )
 692         {
 693             *(ptdata++) = *(ptbits+2);
 694             *(ptdata++) = *(ptbits+1);
 695             *(ptdata++) = *(ptbits  );
 696             ptbits += 3;
 697         }
 698         ptbits += padding;
 699     }
 700
 701     // similarly, set data according to the possible mask bitmap
 702     if( GetMask() && GetMask()->GetMaskBitmap() )
 703     {
 704         hbitmap = (HBITMAP) GetMask()->GetMaskBitmap();
 705         // memory DC created, color set, data copied, and memory DC deleted
 706         HDC memdc = ::CreateCompatibleDC( hdc );
 707         ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
 708         ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
 709         ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
 710         ::DeleteDC( memdc );
 711         // background color set to RGB(16,16,16) in consistent with wxGTK
 712         unsigned char r=16, g=16, b=16;
 713         ptdata = data;
 714         ptbits = lpBits;
 715         for( i=0; i<height; i++ )
 716         {
 717             for( j=0; j<width; j++ )
 718             {
 719                 if( *ptbits != 0 )
 720                     ptdata += 3;
 721                 else
 722                 {
 723                     *(ptdata++)  = r;
 724                     *(ptdata++)  = g;
 725                     *(ptdata++)  = b;
 726                 }
 727                 ptbits += 3;
 728             }
 729             ptbits += padding;
 730         }
 731         image.SetMaskColour( r, g, b );
 732         image.SetMask( TRUE );
 733     }
 734     else
 735     {
 736         image.SetMask( FALSE );
 737     }
 738     // free allocated resources
 739     ::ReleaseDC(NULL, hdc);
 740     free(lpDIBh);
 741     free(lpBits);
 742
 743     return image;
 744 #endif
 745 }
 746
 747 #endif // wxUSE_IMAGE
 748
 749 bool wxBitmap::LoadFile(const wxString& filename, long type)
 750 {
 751     UnRef();
 752
 753     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 754
 755     if ( handler )
 756     {
 757         m_refData = new wxBitmapRefData;
 758
 759         return handler->LoadFile(this, filename, type, -1, -1);
 760     }
 761 #if wxUSE_IMAGE
 762     else
 763     {
 764         wxImage image;
 765         if ( image.LoadFile( filename, type ) && image.Ok() )
 766         {
 767             *this = image.ConvertToBitmap();
 768
 769             return TRUE;
 770         }
 771     }
 772 #endif // wxUSE_IMAGE
 773
 774     return FALSE;
 775 }
 776
 777 bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
 778 {
 779     UnRef();
 780
 781     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 782
 783     if ( !handler )
 784     {
 785         wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %d defined."), type);
 786
 787         return FALSE;
 788     }
 789
 790     m_refData = new wxBitmapRefData;
 791
 792     return handler->Create(this, data, type, width, height, depth);
 793 }
 794
 795 bool wxBitmap::SaveFile(const wxString& filename, int type, const wxPalette *palette)
 796 {
 797     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 798
 799     if ( handler )
 800     {
 801         return handler->SaveFile(this, filename, type, palette);
 802     }
 803 #if wxUSE_IMAGE
 804     else
 805     {
 806         // FIXME what about palette? shouldn't we use it?
 807         wxImage image( *this );
 808         if ( image.Ok() )
 809         {
 810             return image.SaveFile(filename, type);
 811         }
 812     }
 813 #endif // wxUSE_IMAGE
 814
 815     return FALSE;
 816 }
 817
 818 // ----------------------------------------------------------------------------
 819 // sub bitmap extraction
 820 // ----------------------------------------------------------------------------
 821
 822 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 823 {
 824 #ifndef __WXMICROWIN__
 825     wxCHECK_MSG( Ok() &&
 826                  (rect.x >= 0) && (rect.y >= 0) &&
 827                  (rect.x+rect.width <= GetWidth()) &&
 828                  (rect.y+rect.height <= GetHeight()),
 829                  wxNullBitmap, wxT("Invalid bitmap or bitmap region") );
 830
 831     wxBitmap ret( rect.width, rect.height, GetDepth() );
 832     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 833
 834     // copy bitmap data
 835     HDC dcSrc = ::CreateCompatibleDC(NULL);
 836     HDC dcDst = ::CreateCompatibleDC(NULL);
 837     SelectObject(dcSrc, (HBITMAP) GetHBITMAP());
 838     SelectObject(dcDst, (HBITMAP) ret.GetHBITMAP());
 839     BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
 840
 841     // copy mask if there is one
 842     if (GetMask())
 843     {
 844         HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0);
 845
 846         SelectObject(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap());
 847         SelectObject(dcDst, (HBITMAP) hbmpMask);
 848         BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
 849
 850         wxMask *mask = new wxMask((WXHBITMAP) hbmpMask);
 851         ret.SetMask(mask);
 852     }
 853
 854     SelectObject(dcDst, NULL);
 855     SelectObject(dcSrc, NULL);
 856     DeleteDC(dcDst);
 857     DeleteDC(dcSrc);
 858
 859     return ret;
 860 #else
 861     return wxBitmap();
 862 #endif
 863 }
 864
 865 // ----------------------------------------------------------------------------
 866 // wxBitmap accessors
 867 // ----------------------------------------------------------------------------
 868
 869 void wxBitmap::SetQuality(int q)
 870 {
 871     EnsureHasData();
 872
 873     GetBitmapData()->m_quality = q;
 874 }
 875
 876 #if WXWIN_COMPATIBILITY_2
 877 void wxBitmap::SetOk(bool isOk)
 878 {
 879     EnsureHasData();
 880
 881     GetBitmapData()->m_ok = isOk;
 882 }
 883 #endif // WXWIN_COMPATIBILITY_2
 884
 885 void wxBitmap::SetPalette(const wxPalette& palette)
 886 {
 887     EnsureHasData();
 888
 889     GetBitmapData()->m_bitmapPalette = palette;
 890 }
 891
 892 void wxBitmap::SetMask(wxMask *mask)
 893 {
 894     EnsureHasData();
 895
 896     GetBitmapData()->m_bitmapMask = mask;
 897 }
 898
 899 // Creates a bitmap that matches the device context, from
 900 // an arbitray bitmap. At present, the original bitmap must have an
 901 // associated palette. TODO: use a default palette if no palette exists.
 902 // Contributed by Frederic Villeneuve <frederic.villeneuve@natinst.com>
 903 wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const
 904 {
 905 #ifdef __WXMICROWIN__
 906     return wxBitmap();
 907 #else
 908     wxMemoryDC      memDC;
 909     wxBitmap        tmpBitmap(GetWidth(), GetHeight(), dc.GetDepth());
 910     HPALETTE        hPal = (HPALETTE) NULL;
 911     LPBITMAPINFO    lpDib;
 912     void            *lpBits = (void*) NULL;
 913
 914     if( GetPalette() && GetPalette()->Ok() )
 915     {
 916         tmpBitmap.SetPalette(*GetPalette());
 917         memDC.SelectObject(tmpBitmap);
 918         memDC.SetPalette(*GetPalette());
 919         hPal = (HPALETTE)GetPalette()->GetHPALETTE();
 920     }
 921     else
 922     {
 923         hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE);
 924         wxPalette palette;
 925         palette.SetHPALETTE( (WXHPALETTE)hPal );
 926         tmpBitmap.SetPalette( palette );
 927         memDC.SelectObject(tmpBitmap);
 928         memDC.SetPalette( palette );
 929     }
 930
 931     // set the height negative because in a DIB the order of the lines is
 932     // reversed
 933     if ( !wxCreateDIB(GetWidth(), -GetHeight(), GetDepth(), hPal, &lpDib) )
 934     {
 935         return wxNullBitmap;
 936     }
 937
 938     lpBits = malloc(lpDib->bmiHeader.biSizeImage);
 939
 940     ::GetBitmapBits(GetHbitmap(), lpDib->bmiHeader.biSizeImage, lpBits);
 941
 942     ::SetDIBitsToDevice(GetHdcOf(memDC), 0, 0,
 943                         GetWidth(), GetHeight(),
 944                         0, 0, 0, GetHeight(),
 945                         lpBits, lpDib, DIB_RGB_COLORS);
 946
 947     free(lpBits);
 948
 949     wxFreeDIB(lpDib);
 950
 951     return tmpBitmap;
 952 #endif
 953 }
 954
 955 // ----------------------------------------------------------------------------
 956 // wxMask
 957 // ----------------------------------------------------------------------------
 958
 959 wxMask::wxMask()
 960 {
 961     m_maskBitmap = 0;
 962 }
 963
 964 // Construct a mask from a bitmap and a colour indicating
 965 // the transparent area
 966 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
 967 {
 968     m_maskBitmap = 0;
 969     Create(bitmap, colour);
 970 }
 971
 972 // Construct a mask from a bitmap and a palette index indicating
 973 // the transparent area
 974 wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
 975 {
 976     m_maskBitmap = 0;
 977     Create(bitmap, paletteIndex);
 978 }
 979
 980 // Construct a mask from a mono bitmap (copies the bitmap).
 981 wxMask::wxMask(const wxBitmap& bitmap)
 982 {
 983     m_maskBitmap = 0;
 984     Create(bitmap);
 985 }
 986
 987 wxMask::~wxMask()
 988 {
 989     if ( m_maskBitmap )
 990         ::DeleteObject((HBITMAP) m_maskBitmap);
 991 }
 992
 993 // Create a mask from a mono bitmap (copies the bitmap).
 994 bool wxMask::Create(const wxBitmap& bitmap)
 995 {
 996 #ifndef __WXMICROWIN__
 997     wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, FALSE,
 998                  _T("can't create mask from invalid or not monochrome bitmap") );
 999
1000     if ( m_maskBitmap )
1001     {
1002         ::DeleteObject((HBITMAP) m_maskBitmap);
1003         m_maskBitmap = 0;
1004     }
1005
1006     m_maskBitmap = (WXHBITMAP) CreateBitmap(
1007                                             bitmap.GetWidth(),
1008                                             bitmap.GetHeight(),
1009                                             1, 1, 0
1010                                            );
1011     HDC srcDC = CreateCompatibleDC(0);
1012     SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
1013     HDC destDC = CreateCompatibleDC(0);
1014     SelectObject(destDC, (HBITMAP) m_maskBitmap);
1015     BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY);
1016     SelectObject(srcDC, 0);
1017     DeleteDC(srcDC);
1018     SelectObject(destDC, 0);
1019     DeleteDC(destDC);
1020     return TRUE;
1021 #else
1022     return FALSE;
1023 #endif
1024 }
1025
1026 // Create a mask from a bitmap and a palette index indicating
1027 // the transparent area
1028 bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
1029 {
1030     if ( m_maskBitmap )
1031     {
1032         ::DeleteObject((HBITMAP) m_maskBitmap);
1033         m_maskBitmap = 0;
1034     }
1035     if (bitmap.Ok() && bitmap.GetPalette()->Ok())
1036     {
1037         unsigned char red, green, blue;
1038         if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue))
1039         {
1040             wxColour transparentColour(red, green, blue);
1041             return Create(bitmap, transparentColour);
1042         }
1043     }
1044     return FALSE;
1045 }
1046
1047 // Create a mask from a bitmap and a colour indicating
1048 // the transparent area
1049 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1050 {
1051 #ifndef __WXMICROWIN__
1052     wxCHECK_MSG( bitmap.Ok(), FALSE, _T("invalid bitmap in wxMask::Create") );
1053
1054     if ( m_maskBitmap )
1055     {
1056         ::DeleteObject((HBITMAP) m_maskBitmap);
1057         m_maskBitmap = 0;
1058     }
1059
1060     int width = bitmap.GetWidth(),
1061         height = bitmap.GetHeight();
1062
1063     // scan the bitmap for the transparent colour and set the corresponding
1064     // pixels in the mask to BLACK and the rest to WHITE
1065     COLORREF maskColour = wxColourToRGB(colour);
1066     m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0);
1067
1068     HDC srcDC = ::CreateCompatibleDC(NULL);
1069     HDC destDC = ::CreateCompatibleDC(NULL);
1070     if ( !srcDC || !destDC )
1071     {
1072         wxLogLastError(wxT("CreateCompatibleDC"));
1073     }
1074
1075     bool ok = TRUE;
1076
1077     // SelectObject() will fail
1078     wxASSERT_MSG( !bitmap.GetSelectedInto(),
1079                   _T("bitmap can't be selected in another DC") );
1080
1081     HGDIOBJ hbmpSrcOld = ::SelectObject(srcDC, GetHbitmapOf(bitmap));
1082     if ( !hbmpSrcOld )
1083     {
1084         wxLogLastError(wxT("SelectObject"));
1085
1086         ok = FALSE;
1087     }
1088
1089     HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap);
1090     if ( !hbmpDstOld )
1091     {
1092         wxLogLastError(wxT("SelectObject"));
1093
1094         ok = FALSE;
1095     }
1096
1097     // this is not very efficient, but I can't think of a better way of doing
1098     // it
1099     for ( int w = 0; ok && (w < width); w++ )
1100     {
1101         for ( int h = 0; ok && (h < height); h++ )
1102         {
1103             COLORREF col = GetPixel(srcDC, w, h);
1104             if ( col == CLR_INVALID )
1105             {
1106                 wxLogLastError(wxT("GetPixel"));
1107
1108                 // doesn't make sense to continue
1109                 ok = FALSE;
1110
1111                 break;
1112             }
1113
1114             if ( col == maskColour )
1115             {
1116                 ::SetPixel(destDC, w, h, RGB(0, 0, 0));
1117             }
1118             else
1119             {
1120                 ::SetPixel(destDC, w, h, RGB(255, 255, 255));
1121             }
1122         }
1123     }
1124
1125     ::SelectObject(srcDC, hbmpSrcOld);
1126     ::DeleteDC(srcDC);
1127     ::SelectObject(destDC, hbmpDstOld);
1128     ::DeleteDC(destDC);
1129
1130     return ok;
1131 #else
1132     return FALSE;
1133 #endif
1134 }
1135
1136 // ----------------------------------------------------------------------------
1137 // wxBitmapHandler
1138 // ----------------------------------------------------------------------------
1139
1140 bool wxBitmapHandler::Create(wxGDIImage *image,
1141                              void *data,
1142                              long flags,
1143                              int width, int height, int depth)
1144 {
1145     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1146
1147     return bitmap ? Create(bitmap, data, flags, width, height, depth) : FALSE;
1148 }
1149
1150 bool wxBitmapHandler::Load(wxGDIImage *image,
1151                            const wxString& name,
1152                            long flags,
1153                            int width, int height)
1154 {
1155     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1156
1157     return bitmap ? LoadFile(bitmap, name, flags, width, height) : FALSE;
1158 }
1159
1160 bool wxBitmapHandler::Save(wxGDIImage *image,
1161                            const wxString& name,
1162                            int type)
1163 {
1164     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1165
1166     return bitmap ? SaveFile(bitmap, name, type) : FALSE;
1167 }
1168
1169 bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
1170                              void *WXUNUSED(data),
1171                              long WXUNUSED(type),
1172                              int WXUNUSED(width),
1173                              int WXUNUSED(height),
1174                              int WXUNUSED(depth))
1175 {
1176     return FALSE;
1177 }
1178
1179 bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
1180                                const wxString& WXUNUSED(name),
1181                                long WXUNUSED(type),
1182                                int WXUNUSED(desiredWidth),
1183                                int WXUNUSED(desiredHeight))
1184 {
1185     return FALSE;
1186 }
1187
1188 bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
1189                                const wxString& WXUNUSED(name),
1190                                int WXUNUSED(type),
1191                                const wxPalette *WXUNUSED(palette))
1192 {
1193     return FALSE;
1194 }
1195
1196 // ----------------------------------------------------------------------------
1197 // DIB functions
1198 // ----------------------------------------------------------------------------
1199
1200 #ifndef __WXMICROWIN__
1201 bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
1202                  HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
1203 {
1204    unsigned long   i, headerSize;
1205    LPBITMAPINFO    lpDIBheader = NULL;
1206    LPPALETTEENTRY  lpPe = NULL;
1207
1208
1209    // Allocate space for a DIB header
1210    headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
1211    lpDIBheader = (BITMAPINFO *) malloc(headerSize);
1212    lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));
1213
1214    GetPaletteEntries(hPal, 0, 256, lpPe);
1215
1216    memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER));
1217
1218    // Fill in the static parts of the DIB header
1219    lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
1220    lpDIBheader->bmiHeader.biWidth = xSize;
1221    lpDIBheader->bmiHeader.biHeight = ySize;
1222    lpDIBheader->bmiHeader.biPlanes = 1;
1223
1224    // this value must be 1, 4, 8 or 24 so PixelDepth can only be
1225    lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel);
1226    lpDIBheader->bmiHeader.biCompression = BI_RGB;
1227    lpDIBheader->bmiHeader.biSizeImage = xSize * abs(ySize) * bitsPerPixel >> 3;
1228    lpDIBheader->bmiHeader.biClrUsed = 256;
1229
1230
1231    // Initialize the DIB palette
1232    for (i = 0; i < 256; i++) {
1233       lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags;
1234       lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed;
1235       lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen;
1236       lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue;
1237    }
1238
1239    *lpDIBHeader = lpDIBheader;
1240
1241    return TRUE;
1242 }
1243
1244 void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
1245 {
1246     free(lpDIBHeader);
1247 }
1248 #endif
1249
1250 // ----------------------------------------------------------------------------
1251 // other helper functions
1252 // ----------------------------------------------------------------------------
1253
1254 extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
1255 {
1256 #ifndef __WXMICROWIN__
1257     wxCHECK_MSG( hbmpMask, 0, _T("invalid bitmap in wxInvertMask") );
1258
1259     // get width/height from the bitmap if not given
1260     if ( !w || !h )
1261     {
1262         BITMAP bm;
1263         ::GetObject(hbmpMask, sizeof(BITMAP), (LPVOID)&bm);
1264         w = bm.bmWidth;
1265         h = bm.bmHeight;
1266     }
1267
1268     HDC hdcSrc = ::CreateCompatibleDC(NULL);
1269     HDC hdcDst = ::CreateCompatibleDC(NULL);
1270     if ( !hdcSrc || !hdcDst )
1271     {
1272         wxLogLastError(wxT("CreateCompatibleDC"));
1273     }
1274
1275     HBITMAP hbmpInvMask = ::CreateBitmap(w, h, 1, 1, 0);
1276     if ( !hbmpInvMask )
1277     {
1278         wxLogLastError(wxT("CreateBitmap"));
1279     }
1280
1281     ::SelectObject(hdcSrc, hbmpMask);
1282     ::SelectObject(hdcDst, hbmpInvMask);
1283     if ( !::BitBlt(hdcDst, 0, 0, w, h,
1284                    hdcSrc, 0, 0,
1285                    NOTSRCCOPY) )
1286     {
1287         wxLogLastError(wxT("BitBlt"));
1288     }
1289
1290     ::DeleteDC(hdcSrc);
1291     ::DeleteDC(hdcDst);
1292
1293     return hbmpInvMask;
1294 #else
1295     return 0;
1296 #endif
1297 }