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
 148     // delete the old one now as we don't need it any more
 149     ::DeleteObject(iconInfo.hbmMask);
 150
 151 #if WXWIN_COMPATIBILITY_2
 152     refData->m_ok = TRUE;
 153 #endif // WXWIN_COMPATIBILITY_2
 154
 155     return TRUE;
 156 #else
 157     return FALSE;
 158 #endif
 159 }
 160
 161 #endif // Win32
 162
 163 bool wxBitmap::CopyFromCursor(const wxCursor& cursor)
 164 {
 165     UnRef();
 166
 167     if ( !cursor.Ok() )
 168         return FALSE;
 169
 170 #ifdef __WIN16__
 171     wxFAIL_MSG( _T("don't know how to convert cursor to bitmap") );
 172
 173     return FALSE;
 174 #else
 175     return CopyFromIconOrCursor(cursor);
 176 #endif // Win16
 177 }
 178
 179 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 180 {
 181     UnRef();
 182
 183     if ( !icon.Ok() )
 184         return FALSE;
 185
 186     // GetIconInfo() doesn't exist under Win16 and I don't know any other way
 187     // to create a bitmap from icon there - but using this way we won't have
 188     // the mask (FIXME)
 189 #ifdef __WIN16__
 190     int width = icon.GetWidth(),
 191         height = icon.GetHeight();
 192
 193     // copy the icon to the bitmap
 194     ScreenHDC hdcScreen;
 195     HDC hdc = ::CreateCompatibleDC(hdcScreen);
 196     HBITMAP hbitmap = ::CreateCompatibleBitmap(hdcScreen, width, height);
 197     HBITMAP hbmpOld = (HBITMAP)::SelectObject(hdc, hbitmap);
 198
 199     ::DrawIcon(hdc, 0, 0, GetHiconOf(icon));
 200
 201     ::SelectObject(hdc, hbmpOld);
 202     ::DeleteDC(hdc);
 203
 204     wxBitmapRefData *refData = new wxBitmapRefData;
 205     m_refData = refData;
 206
 207     refData->m_width = width;
 208     refData->m_height = height;
 209     refData->m_depth = wxDisplayDepth();
 210
 211     refData->m_hBitmap = (WXHBITMAP)hbitmap;
 212
 213 #if WXWIN_COMPATIBILITY_2
 214     refData->m_ok = TRUE;
 215 #endif // WXWIN_COMPATIBILITY_2
 216
 217     return TRUE;
 218 #else // Win32
 219     return CopyFromIconOrCursor(icon);
 220 #endif // Win16/Win32
 221 }
 222
 223 wxBitmap::~wxBitmap()
 224 {
 225     if (wxTheBitmapList)
 226         wxTheBitmapList->DeleteObject(this);
 227 }
 228
 229 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 230 {
 231     Init();
 232
 233 #ifndef __WXMICROWIN__
 234     wxBitmapRefData *refData = new wxBitmapRefData;
 235     m_refData = refData;
 236
 237     refData->m_width = width;
 238     refData->m_height = height;
 239     refData->m_depth = depth;
 240     refData->m_numColors = 0;
 241     refData->m_selectedInto = NULL;
 242
 243     char *data;
 244     if ( depth == 1 )
 245     {
 246         // we assume that it is in XBM format which is not quite the same as
 247         // the format CreateBitmap() wants because the order of bytes in the
 248         // line is inversed!
 249         const size_t bytesPerLine = (width + 7) / 8;
 250         const size_t padding = bytesPerLine % 2;
 251         const size_t len = height * ( padding + bytesPerLine );
 252         data = (char *)malloc(len);
 253         const char *src = bits;
 254         char *dst = data;
 255
 256         for ( int rows = 0; rows < height; rows++ )
 257         {
 258             for ( size_t cols = 0; cols < bytesPerLine; cols++ )
 259             {
 260                 unsigned char val = *src++;
 261                 unsigned char reversed = 0;
 262
 263                 for ( int bits = 0; bits < 8; bits++)
 264                 {
 265                     reversed <<= 1;
 266                     reversed |= (val & 0x01);
 267                     val >>= 1;
 268                 }
 269                 *dst++ = reversed;
 270             }
 271
 272             if ( padding )
 273                 *dst++ = 0;
 274         }
 275     }
 276     else
 277     {
 278         // bits should already be in Windows standard format
 279         data = (char *)bits;    // const_cast is harmless
 280     }
 281
 282     HBITMAP hbmp = ::CreateBitmap(width, height, 1, depth, data);
 283     if ( !hbmp )
 284     {
 285         wxLogLastError(wxT("CreateBitmap"));
 286     }
 287
 288     if ( data != bits )
 289     {
 290         free(data);
 291     }
 292
 293     SetHBITMAP((WXHBITMAP)hbmp);
 294 #endif
 295 }
 296
 297 // Create from XPM data
 298 bool wxBitmap::CreateFromXpm(const char **data)
 299 {
 300 #if wxUSE_IMAGE && wxUSE_XPM
 301     Init();
 302
 303     wxCHECK_MSG( data != NULL, FALSE, wxT("invalid bitmap data") )
 304
 305     wxXPMDecoder decoder;
 306     wxImage img = decoder.ReadData(data);
 307     wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") )
 308
 309     *this = wxBitmap(img);
 310     return TRUE;
 311 #else
 312     return FALSE;
 313 #endif
 314 }
 315
 316 wxBitmap::wxBitmap(int w, int h, int d)
 317 {
 318     Init();
 319
 320     (void)Create(w, h, d);
 321 }
 322
 323 wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
 324 {
 325     Init();
 326
 327     (void)Create(data, type, width, height, depth);
 328 }
 329
 330 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
 331 {
 332     Init();
 333
 334     LoadFile(filename, (int)type);
 335 }
 336
 337 bool wxBitmap::Create(int w, int h, int d)
 338 {
 339 #ifndef __WXMICROWIN__
 340     UnRef();
 341
 342     m_refData = new wxBitmapRefData;
 343
 344     GetBitmapData()->m_width = w;
 345     GetBitmapData()->m_height = h;
 346     GetBitmapData()->m_depth = d;
 347
 348     HBITMAP hbmp;
 349
 350     if ( d > 0 )
 351     {
 352         hbmp = ::CreateBitmap(w, h, 1, d, NULL);
 353         if ( !hbmp )
 354         {
 355             wxLogLastError(wxT("CreateBitmap"));
 356         }
 357     }
 358     else
 359     {
 360         ScreenHDC dc;
 361         hbmp = ::CreateCompatibleBitmap(dc, w, h);
 362         if ( !hbmp )
 363         {
 364             wxLogLastError(wxT("CreateCompatibleBitmap"));
 365         }
 366
 367         GetBitmapData()->m_depth = wxDisplayDepth();
 368     }
 369
 370     SetHBITMAP((WXHBITMAP)hbmp);
 371
 372 #if WXWIN_COMPATIBILITY_2
 373     GetBitmapData()->m_ok = hbmp != 0;
 374 #endif // WXWIN_COMPATIBILITY_2
 375     return Ok();
 376 #else
 377     return FALSE;
 378 #endif
 379 }
 380
 381 // ----------------------------------------------------------------------------
 382 // wxImage to/from conversions
 383 // ----------------------------------------------------------------------------
 384
 385 #if wxUSE_IMAGE
 386
 387 bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
 388 {
 389 #ifdef __WXMICROWIN__
 390     // TODO
 391     return FALSE;
 392 #else
 393     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
 394
 395     m_refData = new wxBitmapRefData();
 396
 397     // sizeLimit is the MS upper limit for the DIB size
 398 #ifdef  WIN32
 399     int sizeLimit = 1024*768*3;
 400 #else
 401     int sizeLimit = 0x7fff ;
 402 #endif
 403
 404     // width and height of the device-dependent bitmap
 405     int width = image.GetWidth();
 406     int bmpHeight = image.GetHeight();
 407
 408     // calc the number of bytes per scanline and padding
 409     int bytePerLine = width*3;
 410     int sizeDWORD = sizeof( DWORD );
 411     int lineBoundary = bytePerLine % sizeDWORD;
 412     int padding = 0;
 413     if( lineBoundary > 0 )
 414     {
 415         padding = sizeDWORD - lineBoundary;
 416         bytePerLine += padding;
 417     }
 418     // calc the number of DIBs and heights of DIBs
 419     int numDIB = 1;
 420     int hRemain = 0;
 421     int height = sizeLimit/bytePerLine;
 422     if( height >= bmpHeight )
 423         height = bmpHeight;
 424     else
 425     {
 426         numDIB =  bmpHeight / height;
 427         hRemain = bmpHeight % height;
 428         if( hRemain >0 )  numDIB++;
 429     }
 430
 431     // set bitmap parameters
 432     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") );
 433     SetWidth( width );
 434     SetHeight( bmpHeight );
 435     if (depth == -1) depth = wxDisplayDepth();
 436     SetDepth( depth );
 437
 438     // Copy the palette from the source image
 439     SetPalette(image.GetPalette());
 440
 441     // create a DIB header
 442     int headersize = sizeof(BITMAPINFOHEADER);
 443     BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
 444     wxCHECK_MSG( lpDIBh, FALSE, wxT("could not allocate memory for DIB header") );
 445     // Fill in the DIB header
 446     lpDIBh->bmiHeader.biSize = headersize;
 447     lpDIBh->bmiHeader.biWidth = (DWORD)width;
 448     lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 449     lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 450     //   the general formula for biSizeImage:
 451     //      ( ( ( ((DWORD)width*24) +31 ) & ~31 ) >> 3 ) * height;
 452     lpDIBh->bmiHeader.biPlanes = 1;
 453     lpDIBh->bmiHeader.biBitCount = 24;
 454     lpDIBh->bmiHeader.biCompression = BI_RGB;
 455     lpDIBh->bmiHeader.biClrUsed = 0;
 456     // These seem not really needed for our purpose here.
 457     lpDIBh->bmiHeader.biClrImportant = 0;
 458     lpDIBh->bmiHeader.biXPelsPerMeter = 0;
 459     lpDIBh->bmiHeader.biYPelsPerMeter = 0;
 460     // memory for DIB data
 461     unsigned char *lpBits;
 462     lpBits = (unsigned char *)malloc( lpDIBh->bmiHeader.biSizeImage );
 463     if( !lpBits )
 464     {
 465         wxFAIL_MSG( wxT("could not allocate memory for DIB") );
 466         free( lpDIBh );
 467         return FALSE;
 468     }
 469
 470     // create and set the device-dependent bitmap
 471     HDC hdc = ::GetDC(NULL);
 472     HDC memdc = ::CreateCompatibleDC( hdc );
 473     HBITMAP hbitmap;
 474     hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight );
 475     ::SelectObject( memdc, hbitmap);
 476
 477 #if wxUSE_PALETTE
 478     HPALETTE hOldPalette = 0;
 479     if (image.GetPalette().Ok())
 480     {
 481         hOldPalette = ::SelectPalette(memdc, (HPALETTE) image.GetPalette().GetHPALETTE(), FALSE);
 482         ::RealizePalette(memdc);
 483     }
 484 #endif // wxUSE_PALETTE
 485
 486     // copy image data into DIB data and then into DDB (in a loop)
 487     unsigned char *data = image.GetData();
 488     int i, j, n;
 489     int origin = 0;
 490     unsigned char *ptdata = data;
 491     unsigned char *ptbits;
 492
 493     for( n=0; n<numDIB; n++ )
 494     {
 495         if( numDIB > 1 && n == numDIB-1 && hRemain > 0 )
 496         {
 497             // redefine height and size of the (possibly) last smaller DIB
 498             // memory is not reallocated
 499             height = hRemain;
 500             lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 501             lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 502         }
 503         ptbits = lpBits;
 504
 505         for( j=0; j<height; j++ )
 506         {
 507             for( i=0; i<width; i++ )
 508             {
 509                 *(ptbits++) = *(ptdata+2);
 510                 *(ptbits++) = *(ptdata+1);
 511                 *(ptbits++) = *(ptdata  );
 512                 ptdata += 3;
 513             }
 514             for( i=0; i< padding; i++ )   *(ptbits++) = 0;
 515         }
 516         ::StretchDIBits( memdc, 0, origin, width, height,\
 517             0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
 518         origin += height;
 519         // if numDIB = 1,  lines below can also be used
 520         //    hbitmap = CreateDIBitmap( hdc, &(lpDIBh->bmiHeader), CBM_INIT, lpBits, lpDIBh, DIB_RGB_COLORS );
 521         // The above line is equivalent to the following two lines.
 522         //    hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
 523         //    ::SetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS);
 524         // or the following lines
 525         //    hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
 526         //    HDC memdc = ::CreateCompatibleDC( hdc );
 527         //    ::SelectObject( memdc, hbitmap);
 528         //    ::SetDIBitsToDevice( memdc, 0, 0, width, height,
 529         //            0, 0, 0, height, (void *)lpBits, lpDIBh, DIB_RGB_COLORS);
 530         //    ::SelectObject( memdc, 0 );
 531         //    ::DeleteDC( memdc );
 532     }
 533     SetHBITMAP( (WXHBITMAP) hbitmap );
 534
 535 #if wxUSE_PALETTE
 536     if (hOldPalette)
 537         SelectPalette(memdc, hOldPalette, FALSE);
 538 #endif // wxUSE_PALETTE
 539
 540     // similarly, created an mono-bitmap for the possible mask
 541     if( image.HasMask() )
 542     {
 543         hbitmap = ::CreateBitmap( (WORD)width, (WORD)bmpHeight, 1, 1, NULL );
 544         HGDIOBJ hbmpOld = ::SelectObject( memdc, hbitmap);
 545         if( numDIB == 1 )   height = bmpHeight;
 546         else                height = sizeLimit/bytePerLine;
 547         lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 548         lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 549         origin = 0;
 550         unsigned char r = image.GetMaskRed();
 551         unsigned char g = image.GetMaskGreen();
 552         unsigned char b = image.GetMaskBlue();
 553         unsigned char zero = 0, one = 255;
 554         ptdata = data;
 555         for( n=0; n<numDIB; n++ )
 556         {
 557             if( numDIB > 1 && n == numDIB - 1 && hRemain > 0 )
 558             {
 559                 // redefine height and size of the (possibly) last smaller DIB
 560                 // memory is not reallocated
 561                 height = hRemain;
 562                 lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 563                 lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 564             }
 565             ptbits = lpBits;
 566             for( int j=0; j<height; j++ )
 567             {
 568                 for(i=0; i<width; i++ )
 569                 {
 570                     // was causing a code gen bug in cw : if( ( cr !=r) || (cg!=g) || (cb!=b) )
 571                     unsigned char cr = (*(ptdata++)) ;
 572                     unsigned char cg = (*(ptdata++)) ;
 573                     unsigned char cb = (*(ptdata++)) ;
 574
 575                     if( ( cr !=r) || (cg!=g) || (cb!=b) )
 576                     {
 577                         *(ptbits++) = one;
 578                         *(ptbits++) = one;
 579                         *(ptbits++) = one;
 580                     }
 581                     else
 582                     {
 583                         *(ptbits++) = zero;
 584                         *(ptbits++) = zero;
 585                         *(ptbits++) = zero;
 586                     }
 587                 }
 588                 for( i=0; i< padding; i++ )   *(ptbits++) = zero;
 589             }
 590             ::StretchDIBits( memdc, 0, origin, width, height,\
 591                 0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
 592             origin += height;
 593         }
 594         // create a wxMask object
 595         wxMask *mask = new wxMask();
 596         mask->SetMaskBitmap( (WXHBITMAP) hbitmap );
 597         SetMask( mask );
 598         // It will be deleted when the wxBitmap object is deleted (as of 01/1999)
 599         /* The following can also be used but is slow to run
 600         wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue());
 601         wxMask *mask = new wxMask( *this, colour );
 602         SetMask( mask );
 603         */
 604
 605         ::SelectObject( memdc, hbmpOld );
 606     }
 607
 608     // free allocated resources
 609     ::DeleteDC( memdc );
 610     ::ReleaseDC(NULL, hdc);
 611     free(lpDIBh);
 612     free(lpBits);
 613
 614 #if WXWIN_COMPATIBILITY_2
 615     // check the wxBitmap object
 616     GetBitmapData()->SetOk();
 617 #endif // WXWIN_COMPATIBILITY_2
 618
 619     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 620
 621     return TRUE;
 622 #endif
 623 }
 624
 625 wxImage wxBitmap::ConvertToImage() const
 626 {
 627 #ifdef __WXMICROWIN__
 628     // TODO
 629     return wxImage();
 630 #else
 631     wxImage image;
 632
 633     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 634
 635     // create an wxImage object
 636     int width = GetWidth();
 637     int height = GetHeight();
 638     image.Create( width, height );
 639     unsigned char *data = image.GetData();
 640     if( !data )
 641     {
 642         wxFAIL_MSG( wxT("could not allocate data for image") );
 643         return wxNullImage;
 644     }
 645
 646     // calc the number of bytes per scanline and padding in the DIB
 647     int bytePerLine = width*3;
 648     int sizeDWORD = sizeof( DWORD );
 649     int lineBoundary =  bytePerLine % sizeDWORD;
 650     int padding = 0;
 651     if( lineBoundary > 0 )
 652     {
 653         padding = sizeDWORD - lineBoundary;
 654         bytePerLine += padding;
 655     }
 656
 657     // create a DIB header
 658     int headersize = sizeof(BITMAPINFOHEADER);
 659     BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
 660     if( !lpDIBh )
 661     {
 662         wxFAIL_MSG( wxT("could not allocate data for DIB header") );
 663         free( data );
 664         return wxNullImage;
 665     }
 666     // Fill in the DIB header
 667     lpDIBh->bmiHeader.biSize = headersize;
 668     lpDIBh->bmiHeader.biWidth = width;
 669     lpDIBh->bmiHeader.biHeight = -height;
 670     lpDIBh->bmiHeader.biSizeImage = bytePerLine * height;
 671     lpDIBh->bmiHeader.biPlanes = 1;
 672     lpDIBh->bmiHeader.biBitCount = 24;
 673     lpDIBh->bmiHeader.biCompression = BI_RGB;
 674     lpDIBh->bmiHeader.biClrUsed = 0;
 675     // These seem not really needed for our purpose here.
 676     lpDIBh->bmiHeader.biClrImportant = 0;
 677     lpDIBh->bmiHeader.biXPelsPerMeter = 0;
 678     lpDIBh->bmiHeader.biYPelsPerMeter = 0;
 679     // memory for DIB data
 680     unsigned char *lpBits;
 681     lpBits = (unsigned char *) malloc( lpDIBh->bmiHeader.biSizeImage );
 682     if( !lpBits )
 683     {
 684         wxFAIL_MSG( wxT("could not allocate data for DIB") );
 685         free( data );
 686         free( lpDIBh );
 687         return wxNullImage;
 688     }
 689
 690     // copy data from the device-dependent bitmap to the DIB
 691     HDC hdc = ::GetDC(NULL);
 692     HBITMAP hbitmap;
 693     hbitmap = (HBITMAP) GetHBITMAP();
 694     ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
 695
 696     // copy DIB data into the wxImage object
 697     int i, j;
 698     unsigned char *ptdata = data;
 699     unsigned char *ptbits = lpBits;
 700     for( i=0; i<height; i++ )
 701     {
 702         for( j=0; j<width; j++ )
 703         {
 704             *(ptdata++) = *(ptbits+2);
 705             *(ptdata++) = *(ptbits+1);
 706             *(ptdata++) = *(ptbits  );
 707             ptbits += 3;
 708         }
 709         ptbits += padding;
 710     }
 711
 712     // similarly, set data according to the possible mask bitmap
 713     if( GetMask() && GetMask()->GetMaskBitmap() )
 714     {
 715         hbitmap = (HBITMAP) GetMask()->GetMaskBitmap();
 716         // memory DC created, color set, data copied, and memory DC deleted
 717         HDC memdc = ::CreateCompatibleDC( hdc );
 718         ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
 719         ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
 720         ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
 721         ::DeleteDC( memdc );
 722         // background color set to RGB(16,16,16) in consistent with wxGTK
 723         unsigned char r=16, g=16, b=16;
 724         ptdata = data;
 725         ptbits = lpBits;
 726         for( i=0; i<height; i++ )
 727         {
 728             for( j=0; j<width; j++ )
 729             {
 730                 if( *ptbits != 0 )
 731                     ptdata += 3;
 732                 else
 733                 {
 734                     *(ptdata++)  = r;
 735                     *(ptdata++)  = g;
 736                     *(ptdata++)  = b;
 737                 }
 738                 ptbits += 3;
 739             }
 740             ptbits += padding;
 741         }
 742         image.SetMaskColour( r, g, b );
 743         image.SetMask( TRUE );
 744     }
 745     else
 746     {
 747         image.SetMask( FALSE );
 748     }
 749     // free allocated resources
 750     ::ReleaseDC(NULL, hdc);
 751     free(lpDIBh);
 752     free(lpBits);
 753
 754     return image;
 755 #endif
 756 }
 757
 758 #endif // wxUSE_IMAGE
 759
 760 bool wxBitmap::LoadFile(const wxString& filename, long type)
 761 {
 762     UnRef();
 763
 764     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 765
 766     if ( handler )
 767     {
 768         m_refData = new wxBitmapRefData;
 769
 770         return handler->LoadFile(this, filename, type, -1, -1);
 771     }
 772 #if wxUSE_IMAGE
 773     else
 774     {
 775         wxImage image;
 776         if ( image.LoadFile( filename, type ) && image.Ok() )
 777         {
 778             *this = image.ConvertToBitmap();
 779
 780             return TRUE;
 781         }
 782     }
 783 #endif // wxUSE_IMAGE
 784
 785     return FALSE;
 786 }
 787
 788 bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
 789 {
 790     UnRef();
 791
 792     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 793
 794     if ( !handler )
 795     {
 796         wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %d defined."), type);
 797
 798         return FALSE;
 799     }
 800
 801     m_refData = new wxBitmapRefData;
 802
 803     return handler->Create(this, data, type, width, height, depth);
 804 }
 805
 806 bool wxBitmap::SaveFile(const wxString& filename,
 807                         int type,
 808                         const wxPalette *palette)
 809 {
 810     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 811
 812     if ( handler )
 813     {
 814         return handler->SaveFile(this, filename, type, palette);
 815     }
 816 #if wxUSE_IMAGE
 817     else
 818     {
 819         // FIXME what about palette? shouldn't we use it?
 820         wxImage image( *this );
 821         if ( image.Ok() )
 822         {
 823             return image.SaveFile(filename, type);
 824         }
 825     }
 826 #endif // wxUSE_IMAGE
 827
 828     return FALSE;
 829 }
 830
 831 // ----------------------------------------------------------------------------
 832 // sub bitmap extraction
 833 // ----------------------------------------------------------------------------
 834
 835 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 836 {
 837 #ifndef __WXMICROWIN__
 838     wxCHECK_MSG( Ok() &&
 839                  (rect.x >= 0) && (rect.y >= 0) &&
 840                  (rect.x+rect.width <= GetWidth()) &&
 841                  (rect.y+rect.height <= GetHeight()),
 842                  wxNullBitmap, wxT("Invalid bitmap or bitmap region") );
 843
 844     wxBitmap ret( rect.width, rect.height, GetDepth() );
 845     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 846
 847     // copy bitmap data
 848     HDC dcSrc = ::CreateCompatibleDC(NULL);
 849     HDC dcDst = ::CreateCompatibleDC(NULL);
 850     SelectObject(dcSrc, (HBITMAP) GetHBITMAP());
 851     SelectObject(dcDst, (HBITMAP) ret.GetHBITMAP());
 852     BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
 853
 854     // copy mask if there is one
 855     if (GetMask())
 856     {
 857         HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0);
 858
 859         SelectObject(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap());
 860         SelectObject(dcDst, (HBITMAP) hbmpMask);
 861         BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
 862
 863         wxMask *mask = new wxMask((WXHBITMAP) hbmpMask);
 864         ret.SetMask(mask);
 865     }
 866
 867     SelectObject(dcDst, NULL);
 868     SelectObject(dcSrc, NULL);
 869     DeleteDC(dcDst);
 870     DeleteDC(dcSrc);
 871
 872     return ret;
 873 #else
 874     return wxBitmap();
 875 #endif
 876 }
 877
 878 // ----------------------------------------------------------------------------
 879 // wxBitmap accessors
 880 // ----------------------------------------------------------------------------
 881
 882 void wxBitmap::SetQuality(int q)
 883 {
 884     EnsureHasData();
 885
 886     GetBitmapData()->m_quality = q;
 887 }
 888
 889 #if WXWIN_COMPATIBILITY_2
 890 void wxBitmap::SetOk(bool isOk)
 891 {
 892     EnsureHasData();
 893
 894     GetBitmapData()->m_ok = isOk;
 895 }
 896 #endif // WXWIN_COMPATIBILITY_2
 897
 898 #if wxUSE_PALETTE
 899
 900 void wxBitmap::SetPalette(const wxPalette& palette)
 901 {
 902     EnsureHasData();
 903
 904     GetBitmapData()->m_bitmapPalette = palette;
 905 }
 906
 907 #endif // wxUSE_PALETTE
 908
 909 void wxBitmap::SetMask(wxMask *mask)
 910 {
 911     EnsureHasData();
 912
 913     GetBitmapData()->m_bitmapMask = mask;
 914 }
 915
 916 // Creates a bitmap that matches the device context, from
 917 // an arbitray bitmap. At present, the original bitmap must have an
 918 // associated palette. TODO: use a default palette if no palette exists.
 919 // Contributed by Frederic Villeneuve <frederic.villeneuve@natinst.com>
 920 wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const
 921 {
 922 #ifdef __WXMICROWIN__
 923     return wxBitmap();
 924 #else
 925     wxMemoryDC      memDC;
 926     wxBitmap        tmpBitmap(GetWidth(), GetHeight(), dc.GetDepth());
 927     HPALETTE        hPal = (HPALETTE) NULL;
 928     LPBITMAPINFO    lpDib;
 929     void            *lpBits = (void*) NULL;
 930
 931 #if wxUSE_PALETTE
 932     if( GetPalette() && GetPalette()->Ok() )
 933     {
 934         tmpBitmap.SetPalette(*GetPalette());
 935         memDC.SelectObject(tmpBitmap);
 936         memDC.SetPalette(*GetPalette());
 937         hPal = (HPALETTE)GetPalette()->GetHPALETTE();
 938     }
 939     else
 940     {
 941         hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE);
 942         wxPalette palette;
 943         palette.SetHPALETTE( (WXHPALETTE)hPal );
 944         tmpBitmap.SetPalette( palette );
 945         memDC.SelectObject(tmpBitmap);
 946         memDC.SetPalette( palette );
 947     }
 948 #else // !wxUSE_PALETTE
 949     hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE);
 950 #endif // wxUSE_PALETTE/!wxUSE_PALETTE
 951
 952     // set the height negative because in a DIB the order of the lines is
 953     // reversed
 954     if ( !wxCreateDIB(GetWidth(), -GetHeight(), GetDepth(), hPal, &lpDib) )
 955     {
 956         return wxNullBitmap;
 957     }
 958
 959     lpBits = malloc(lpDib->bmiHeader.biSizeImage);
 960
 961     ::GetBitmapBits(GetHbitmap(), lpDib->bmiHeader.biSizeImage, lpBits);
 962
 963     ::SetDIBitsToDevice(GetHdcOf(memDC), 0, 0,
 964                         GetWidth(), GetHeight(),
 965                         0, 0, 0, GetHeight(),
 966                         lpBits, lpDib, DIB_RGB_COLORS);
 967
 968     free(lpBits);
 969
 970     wxFreeDIB(lpDib);
 971
 972     return tmpBitmap;
 973 #endif
 974 }
 975
 976 // ----------------------------------------------------------------------------
 977 // wxMask
 978 // ----------------------------------------------------------------------------
 979
 980 wxMask::wxMask()
 981 {
 982     m_maskBitmap = 0;
 983 }
 984
 985 // Construct a mask from a bitmap and a colour indicating
 986 // the transparent area
 987 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
 988 {
 989     m_maskBitmap = 0;
 990     Create(bitmap, colour);
 991 }
 992
 993 // Construct a mask from a bitmap and a palette index indicating
 994 // the transparent area
 995 wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
 996 {
 997     m_maskBitmap = 0;
 998     Create(bitmap, paletteIndex);
 999 }
1000
1001 // Construct a mask from a mono bitmap (copies the bitmap).
1002 wxMask::wxMask(const wxBitmap& bitmap)
1003 {
1004     m_maskBitmap = 0;
1005     Create(bitmap);
1006 }
1007
1008 wxMask::~wxMask()
1009 {
1010     if ( m_maskBitmap )
1011         ::DeleteObject((HBITMAP) m_maskBitmap);
1012 }
1013
1014 // Create a mask from a mono bitmap (copies the bitmap).
1015 bool wxMask::Create(const wxBitmap& bitmap)
1016 {
1017 #ifndef __WXMICROWIN__
1018     wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, FALSE,
1019                  _T("can't create mask from invalid or not monochrome bitmap") );
1020
1021     if ( m_maskBitmap )
1022     {
1023         ::DeleteObject((HBITMAP) m_maskBitmap);
1024         m_maskBitmap = 0;
1025     }
1026
1027     m_maskBitmap = (WXHBITMAP) CreateBitmap(
1028                                             bitmap.GetWidth(),
1029                                             bitmap.GetHeight(),
1030                                             1, 1, 0
1031                                            );
1032     HDC srcDC = CreateCompatibleDC(0);
1033     SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
1034     HDC destDC = CreateCompatibleDC(0);
1035     SelectObject(destDC, (HBITMAP) m_maskBitmap);
1036     BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY);
1037     SelectObject(srcDC, 0);
1038     DeleteDC(srcDC);
1039     SelectObject(destDC, 0);
1040     DeleteDC(destDC);
1041     return TRUE;
1042 #else
1043     return FALSE;
1044 #endif
1045 }
1046
1047 // Create a mask from a bitmap and a palette index indicating
1048 // the transparent area
1049 bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
1050 {
1051     if ( m_maskBitmap )
1052     {
1053         ::DeleteObject((HBITMAP) m_maskBitmap);
1054         m_maskBitmap = 0;
1055     }
1056
1057 #if wxUSE_PALETTE
1058     if (bitmap.Ok() && bitmap.GetPalette()->Ok())
1059     {
1060         unsigned char red, green, blue;
1061         if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue))
1062         {
1063             wxColour transparentColour(red, green, blue);
1064             return Create(bitmap, transparentColour);
1065         }
1066     }
1067 #endif // wxUSE_PALETTE
1068
1069     return FALSE;
1070 }
1071
1072 // Create a mask from a bitmap and a colour indicating
1073 // the transparent area
1074 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1075 {
1076 #ifndef __WXMICROWIN__
1077     wxCHECK_MSG( bitmap.Ok(), FALSE, _T("invalid bitmap in wxMask::Create") );
1078
1079     if ( m_maskBitmap )
1080     {
1081         ::DeleteObject((HBITMAP) m_maskBitmap);
1082         m_maskBitmap = 0;
1083     }
1084
1085     int width = bitmap.GetWidth(),
1086         height = bitmap.GetHeight();
1087
1088     // scan the bitmap for the transparent colour and set the corresponding
1089     // pixels in the mask to BLACK and the rest to WHITE
1090     COLORREF maskColour = wxColourToRGB(colour);
1091     m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0);
1092
1093     HDC srcDC = ::CreateCompatibleDC(NULL);
1094     HDC destDC = ::CreateCompatibleDC(NULL);
1095     if ( !srcDC || !destDC )
1096     {
1097         wxLogLastError(wxT("CreateCompatibleDC"));
1098     }
1099
1100     bool ok = TRUE;
1101
1102     // SelectObject() will fail
1103     wxASSERT_MSG( !bitmap.GetSelectedInto(),
1104                   _T("bitmap can't be selected in another DC") );
1105
1106     HGDIOBJ hbmpSrcOld = ::SelectObject(srcDC, GetHbitmapOf(bitmap));
1107     if ( !hbmpSrcOld )
1108     {
1109         wxLogLastError(wxT("SelectObject"));
1110
1111         ok = FALSE;
1112     }
1113
1114     HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap);
1115     if ( !hbmpDstOld )
1116     {
1117         wxLogLastError(wxT("SelectObject"));
1118
1119         ok = FALSE;
1120     }
1121
1122     // this is not very efficient, but I can't think of a better way of doing
1123     // it
1124     for ( int w = 0; ok && (w < width); w++ )
1125     {
1126         for ( int h = 0; ok && (h < height); h++ )
1127         {
1128             COLORREF col = GetPixel(srcDC, w, h);
1129             if ( col == CLR_INVALID )
1130             {
1131                 wxLogLastError(wxT("GetPixel"));
1132
1133                 // doesn't make sense to continue
1134                 ok = FALSE;
1135
1136                 break;
1137             }
1138
1139             if ( col == maskColour )
1140             {
1141                 ::SetPixel(destDC, w, h, RGB(0, 0, 0));
1142             }
1143             else
1144             {
1145                 ::SetPixel(destDC, w, h, RGB(255, 255, 255));
1146             }
1147         }
1148     }
1149
1150     ::SelectObject(srcDC, hbmpSrcOld);
1151     ::DeleteDC(srcDC);
1152     ::SelectObject(destDC, hbmpDstOld);
1153     ::DeleteDC(destDC);
1154
1155     return ok;
1156 #else
1157     return FALSE;
1158 #endif
1159 }
1160
1161 // ----------------------------------------------------------------------------
1162 // wxBitmapHandler
1163 // ----------------------------------------------------------------------------
1164
1165 bool wxBitmapHandler::Create(wxGDIImage *image,
1166                              void *data,
1167                              long flags,
1168                              int width, int height, int depth)
1169 {
1170     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1171
1172     return bitmap ? Create(bitmap, data, flags, width, height, depth) : FALSE;
1173 }
1174
1175 bool wxBitmapHandler::Load(wxGDIImage *image,
1176                            const wxString& name,
1177                            long flags,
1178                            int width, int height)
1179 {
1180     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1181
1182     return bitmap ? LoadFile(bitmap, name, flags, width, height) : FALSE;
1183 }
1184
1185 bool wxBitmapHandler::Save(wxGDIImage *image,
1186                            const wxString& name,
1187                            int type)
1188 {
1189     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1190
1191     return bitmap ? SaveFile(bitmap, name, type) : FALSE;
1192 }
1193
1194 bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
1195                              void *WXUNUSED(data),
1196                              long WXUNUSED(type),
1197                              int WXUNUSED(width),
1198                              int WXUNUSED(height),
1199                              int WXUNUSED(depth))
1200 {
1201     return FALSE;
1202 }
1203
1204 bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
1205                                const wxString& WXUNUSED(name),
1206                                long WXUNUSED(type),
1207                                int WXUNUSED(desiredWidth),
1208                                int WXUNUSED(desiredHeight))
1209 {
1210     return FALSE;
1211 }
1212
1213 bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
1214                                const wxString& WXUNUSED(name),
1215                                int WXUNUSED(type),
1216                                const wxPalette *WXUNUSED(palette))
1217 {
1218     return FALSE;
1219 }
1220
1221 // ----------------------------------------------------------------------------
1222 // DIB functions
1223 // ----------------------------------------------------------------------------
1224
1225 #ifndef __WXMICROWIN__
1226 bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
1227                  HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
1228 {
1229    unsigned long   i, headerSize;
1230    LPBITMAPINFO    lpDIBheader = NULL;
1231    LPPALETTEENTRY  lpPe = NULL;
1232
1233
1234    // Allocate space for a DIB header
1235    headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
1236    lpDIBheader = (BITMAPINFO *) malloc(headerSize);
1237    lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));
1238
1239    GetPaletteEntries(hPal, 0, 256, lpPe);
1240
1241    memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER));
1242
1243    // Fill in the static parts of the DIB header
1244    lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
1245    lpDIBheader->bmiHeader.biWidth = xSize;
1246    lpDIBheader->bmiHeader.biHeight = ySize;
1247    lpDIBheader->bmiHeader.biPlanes = 1;
1248
1249    // this value must be 1, 4, 8 or 24 so PixelDepth can only be
1250    lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel);
1251    lpDIBheader->bmiHeader.biCompression = BI_RGB;
1252    lpDIBheader->bmiHeader.biSizeImage = xSize * abs(ySize) * bitsPerPixel >> 3;
1253    lpDIBheader->bmiHeader.biClrUsed = 256;
1254
1255
1256    // Initialize the DIB palette
1257    for (i = 0; i < 256; i++) {
1258       lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags;
1259       lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed;
1260       lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen;
1261       lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue;
1262    }
1263
1264    *lpDIBHeader = lpDIBheader;
1265
1266    return TRUE;
1267 }
1268
1269 void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
1270 {
1271     free(lpDIBHeader);
1272 }
1273 #endif
1274
1275 // ----------------------------------------------------------------------------
1276 // other helper functions
1277 // ----------------------------------------------------------------------------
1278
1279 extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
1280 {
1281 #ifndef __WXMICROWIN__
1282     wxCHECK_MSG( hbmpMask, 0, _T("invalid bitmap in wxInvertMask") );
1283
1284     // get width/height from the bitmap if not given
1285     if ( !w || !h )
1286     {
1287         BITMAP bm;
1288         ::GetObject(hbmpMask, sizeof(BITMAP), (LPVOID)&bm);
1289         w = bm.bmWidth;
1290         h = bm.bmHeight;
1291     }
1292
1293     HDC hdcSrc = ::CreateCompatibleDC(NULL);
1294     HDC hdcDst = ::CreateCompatibleDC(NULL);
1295     if ( !hdcSrc || !hdcDst )
1296     {
1297         wxLogLastError(wxT("CreateCompatibleDC"));
1298     }
1299
1300     HBITMAP hbmpInvMask = ::CreateBitmap(w, h, 1, 1, 0);
1301     if ( !hbmpInvMask )
1302     {
1303         wxLogLastError(wxT("CreateBitmap"));
1304     }
1305
1306     ::SelectObject(hdcSrc, hbmpMask);
1307     ::SelectObject(hdcDst, hbmpInvMask);
1308     if ( !::BitBlt(hdcDst, 0, 0, w, h,
1309                    hdcSrc, 0, 0,
1310                    NOTSRCCOPY) )
1311     {
1312         wxLogLastError(wxT("BitBlt"));
1313     }
1314
1315     ::DeleteDC(hdcSrc);
1316     ::DeleteDC(hdcDst);
1317
1318     return hbmpInvMask;
1319 #else
1320     return 0;
1321 #endif
1322 }