src/msw/gdiimage.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/gdiimage.cpp
   3 // Purpose:     wxGDIImage implementation
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     20.11.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "gdiimage.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 "wx/string.h"
  33     #include "wx/log.h"
  34 #endif // WX_PRECOMP
  35
  36 #include "wx/msw/private.h"
  37
  38 #include "wx/app.h"
  39
  40 #include "wx/bitmap.h"
  41 #include "wx/msw/gdiimage.h"
  42
  43 #if wxUSE_WXDIB
  44 #include "wx/msw/dib.h"
  45 #endif
  46
  47 #ifdef __WXWINCE__
  48 #include <winreg.h>
  49 #include <shellapi.h>
  50 #endif
  51
  52 #include "wx/file.h"
  53
  54 #include "wx/listimpl.cpp"
  55 WX_DEFINE_LIST(wxGDIImageHandlerList);
  56
  57 // ----------------------------------------------------------------------------
  58 // auxiliary functions
  59 // ----------------------------------------------------------------------------
  60
  61 #ifdef __WXWINCE__
  62 // Used in wxBMPFileHandler::LoadFile
  63 HBITMAP wxLoadBMP(const wxString& filename) ;
  64 #endif
  65
  66 // ----------------------------------------------------------------------------
  67 // private classes
  68 // ----------------------------------------------------------------------------
  69
  70 #ifndef __WXMICROWIN__
  71
  72 // all image handlers are declared/defined in this file because the outside
  73 // world doesn't have to know about them (but only about wxBITMAP_TYPE_XXX ids)
  74
  75 class WXDLLEXPORT wxBMPFileHandler : public wxBitmapHandler
  76 {
  77 public:
  78     wxBMPFileHandler() : wxBitmapHandler(_T("Windows bitmap file"), _T("bmp"),
  79                                          wxBITMAP_TYPE_BMP)
  80     {
  81     }
  82
  83     virtual bool LoadFile(wxBitmap *bitmap,
  84                           const wxString& name, long flags,
  85                           int desiredWidth, int desiredHeight);
  86     virtual bool SaveFile(wxBitmap *bitmap,
  87                           const wxString& name, int type,
  88                           const wxPalette *palette = NULL);
  89
  90 private:
  91     DECLARE_DYNAMIC_CLASS(wxBMPFileHandler)
  92 };
  93
  94 class WXDLLEXPORT wxBMPResourceHandler: public wxBitmapHandler
  95 {
  96 public:
  97     wxBMPResourceHandler() : wxBitmapHandler(_T("Windows bitmap resource"),
  98                                              wxEmptyString,
  99                                              wxBITMAP_TYPE_BMP_RESOURCE)
 100     {
 101     }
 102
 103     virtual bool LoadFile(wxBitmap *bitmap,
 104                           const wxString& name, long flags,
 105                           int desiredWidth, int desiredHeight);
 106
 107 private:
 108     DECLARE_DYNAMIC_CLASS(wxBMPResourceHandler)
 109 };
 110
 111 class WXDLLEXPORT wxIconHandler : public wxGDIImageHandler
 112 {
 113 public:
 114     wxIconHandler(const wxString& name, const wxString& ext, long type)
 115         : wxGDIImageHandler(name, ext, type)
 116     {
 117     }
 118
 119     // creating and saving icons is not supported
 120     virtual bool Create(wxGDIImage *WXUNUSED(image),
 121                         void *WXUNUSED(data),
 122                         long WXUNUSED(flags),
 123                         int WXUNUSED(width),
 124                         int WXUNUSED(height),
 125                         int WXUNUSED(depth) = 1)
 126     {
 127         return false;
 128     }
 129
 130     virtual bool Save(wxGDIImage *WXUNUSED(image),
 131                       const wxString& WXUNUSED(name),
 132                       int WXUNUSED(type))
 133     {
 134         return false;
 135     }
 136
 137     virtual bool Load(wxGDIImage *image,
 138                       const wxString& name,
 139                       long flags,
 140                       int desiredWidth, int desiredHeight)
 141     {
 142         wxIcon *icon = wxDynamicCast(image, wxIcon);
 143         wxCHECK_MSG( icon, false, _T("wxIconHandler only works with icons") );
 144
 145         return LoadIcon(icon, name, flags, desiredWidth, desiredHeight);
 146     }
 147
 148 protected:
 149     virtual bool LoadIcon(wxIcon *icon,
 150                           const wxString& name, long flags,
 151                           int desiredWidth = -1, int desiredHeight = -1) = 0;
 152 };
 153
 154 class WXDLLEXPORT wxICOFileHandler : public wxIconHandler
 155 {
 156 public:
 157     wxICOFileHandler() : wxIconHandler(_T("ICO icon file"),
 158                                        _T("ico"),
 159                                        wxBITMAP_TYPE_ICO)
 160     {
 161     }
 162
 163     virtual bool LoadIcon(wxIcon *icon,
 164                           const wxString& name, long flags,
 165                           int desiredWidth = -1, int desiredHeight = -1);
 166
 167 private:
 168     DECLARE_DYNAMIC_CLASS(wxICOFileHandler)
 169 };
 170
 171 class WXDLLEXPORT wxICOResourceHandler: public wxIconHandler
 172 {
 173 public:
 174     wxICOResourceHandler() : wxIconHandler(_T("ICO resource"),
 175                                            _T("ico"),
 176                                            wxBITMAP_TYPE_ICO_RESOURCE)
 177     {
 178     }
 179
 180     virtual bool LoadIcon(wxIcon *icon,
 181                           const wxString& name, long flags,
 182                           int desiredWidth = -1, int desiredHeight = -1);
 183
 184 private:
 185     DECLARE_DYNAMIC_CLASS(wxICOResourceHandler)
 186 };
 187
 188 // ----------------------------------------------------------------------------
 189 // wxWin macros
 190 // ----------------------------------------------------------------------------
 191
 192 IMPLEMENT_DYNAMIC_CLASS(wxBMPFileHandler, wxBitmapHandler)
 193 IMPLEMENT_DYNAMIC_CLASS(wxBMPResourceHandler, wxBitmapHandler)
 194 IMPLEMENT_DYNAMIC_CLASS(wxICOFileHandler, wxObject)
 195 IMPLEMENT_DYNAMIC_CLASS(wxICOResourceHandler, wxObject)
 196
 197 // ----------------------------------------------------------------------------
 198 // private functions
 199 // ----------------------------------------------------------------------------
 200
 201 #endif
 202     // __MICROWIN__
 203
 204 // ============================================================================
 205 // implementation
 206 // ============================================================================
 207
 208 wxGDIImageHandlerList wxGDIImage::ms_handlers;
 209
 210 // ----------------------------------------------------------------------------
 211 // wxGDIImage functions forwarded to wxGDIImageRefData
 212 // ----------------------------------------------------------------------------
 213
 214 bool wxGDIImage::FreeResource(bool WXUNUSED(force))
 215 {
 216     if ( !IsNull() )
 217     {
 218         GetGDIImageData()->Free();
 219         GetGDIImageData()->m_handle = 0;
 220     }
 221
 222     return true;
 223 }
 224
 225 WXHANDLE wxGDIImage::GetResourceHandle() const
 226 {
 227     return GetHandle();
 228 }
 229
 230 // ----------------------------------------------------------------------------
 231 // wxGDIImage handler stuff
 232 // ----------------------------------------------------------------------------
 233
 234 void wxGDIImage::AddHandler(wxGDIImageHandler *handler)
 235 {
 236     ms_handlers.Append(handler);
 237 }
 238
 239 void wxGDIImage::InsertHandler(wxGDIImageHandler *handler)
 240 {
 241     ms_handlers.Insert(handler);
 242 }
 243
 244 bool wxGDIImage::RemoveHandler(const wxString& name)
 245 {
 246     wxGDIImageHandler *handler = FindHandler(name);
 247     if ( handler )
 248     {
 249         ms_handlers.DeleteObject(handler);
 250         return true;
 251     }
 252     else
 253         return false;
 254 }
 255
 256 wxGDIImageHandler *wxGDIImage::FindHandler(const wxString& name)
 257 {
 258     wxGDIImageHandlerList::compatibility_iterator node = ms_handlers.GetFirst();
 259     while ( node )
 260     {
 261         wxGDIImageHandler *handler = node->GetData();
 262         if ( handler->GetName() == name )
 263             return handler;
 264         node = node->GetNext();
 265     }
 266
 267     return NULL;
 268 }
 269
 270 wxGDIImageHandler *wxGDIImage::FindHandler(const wxString& extension,
 271                                            long type)
 272 {
 273     wxGDIImageHandlerList::compatibility_iterator node = ms_handlers.GetFirst();
 274     while ( node )
 275     {
 276         wxGDIImageHandler *handler = node->GetData();
 277         if ( (handler->GetExtension() = extension) &&
 278              (type == -1 || handler->GetType() == type) )
 279         {
 280             return handler;
 281         }
 282
 283         node = node->GetNext();
 284     }
 285     return NULL;
 286 }
 287
 288 wxGDIImageHandler *wxGDIImage::FindHandler(long type)
 289 {
 290     wxGDIImageHandlerList::compatibility_iterator node = ms_handlers.GetFirst();
 291     while ( node )
 292     {
 293         wxGDIImageHandler *handler = node->GetData();
 294         if ( handler->GetType() == type )
 295             return handler;
 296
 297         node = node->GetNext();
 298     }
 299
 300     return NULL;
 301 }
 302
 303 void wxGDIImage::CleanUpHandlers()
 304 {
 305     wxGDIImageHandlerList::compatibility_iterator node = ms_handlers.GetFirst();
 306     while ( node )
 307     {
 308         wxGDIImageHandler *handler = node->GetData();
 309         wxGDIImageHandlerList::compatibility_iterator next = node->GetNext();
 310         delete handler;
 311         ms_handlers.Erase( node );
 312         node = next;
 313     }
 314 }
 315
 316 void wxGDIImage::InitStandardHandlers()
 317 {
 318 #ifndef __WXMICROWIN__
 319     AddHandler(new wxBMPResourceHandler);
 320     AddHandler(new wxBMPFileHandler);
 321     AddHandler(new wxICOResourceHandler);
 322     AddHandler(new wxICOFileHandler);
 323 #endif
 324 }
 325
 326 #ifndef __WXMICROWIN__
 327
 328 // ----------------------------------------------------------------------------
 329 // wxBitmap handlers
 330 // ----------------------------------------------------------------------------
 331
 332 bool wxBMPResourceHandler::LoadFile(wxBitmap *bitmap,
 333                                     const wxString& name, long WXUNUSED(flags),
 334                                     int WXUNUSED(desiredWidth),
 335                                     int WXUNUSED(desiredHeight))
 336 {
 337     // TODO: load colourmap.
 338     bitmap->SetHBITMAP((WXHBITMAP)::LoadBitmap(wxGetInstance(), name));
 339
 340     if ( !bitmap->Ok() )
 341     {
 342         // it's probably not found
 343         wxLogError(wxT("Can't load bitmap '%s' from resources! Check .rc file."),
 344                    name.c_str());
 345
 346         return false;
 347     }
 348
 349     BITMAP bm;
 350     if ( !::GetObject(GetHbitmapOf(*bitmap), sizeof(BITMAP), (LPSTR) &bm) )
 351     {
 352         wxLogLastError(wxT("GetObject(HBITMAP)"));
 353     }
 354
 355     bitmap->SetWidth(bm.bmWidth);
 356     bitmap->SetHeight(bm.bmHeight);
 357     bitmap->SetDepth(bm.bmBitsPixel);
 358
 359     // use 0xc0c0c0 as transparent colour by default
 360     bitmap->SetMask(new wxMask(*bitmap, *wxLIGHT_GREY));
 361
 362     return true;
 363 }
 364
 365 bool wxBMPFileHandler::LoadFile(wxBitmap *bitmap,
 366                                 const wxString& name, long WXUNUSED(flags),
 367                                 int WXUNUSED(desiredWidth),
 368                                 int WXUNUSED(desiredHeight))
 369 {
 370 #if wxUSE_WXDIB
 371     wxCHECK_MSG( bitmap, false, _T("NULL bitmap in LoadFile") );
 372
 373     wxDIB dib(name);
 374
 375     bool ok = dib.IsOk() && bitmap->CopyFromDIB(dib);
 376     return ok;
 377 #else
 378   WXHBITMAP hBitmap = (WXHBITMAP)wxLoadBMP(name);
 379   if(hBitmap) {
 380       bitmap->SetHBITMAP(hBitmap);
 381       return TRUE;
 382   }
 383     return FALSE;
 384 #endif
 385 }
 386
 387 bool wxBMPFileHandler::SaveFile(wxBitmap *bitmap,
 388                                 const wxString& name,
 389                                 int WXUNUSED(type),
 390                                 const wxPalette * WXUNUSED(pal))
 391 {
 392 #if wxUSE_WXDIB
 393     wxCHECK_MSG( bitmap, false, _T("NULL bitmap in SaveFile") );
 394
 395     wxDIB dib(*bitmap);
 396
 397     return dib.Save(name);
 398 #else
 399     return FALSE;
 400 #endif
 401 }
 402
 403 // ----------------------------------------------------------------------------
 404 // wxIcon handlers
 405 // ----------------------------------------------------------------------------
 406
 407 bool wxICOFileHandler::LoadIcon(wxIcon *icon,
 408                                 const wxString& name,
 409                                 long WXUNUSED(flags),
 410                                 int desiredWidth, int desiredHeight)
 411 {
 412     icon->UnRef();
 413
 414     // actual size
 415     wxSize size;
 416
 417     HICON hicon = NULL;
 418
 419     // Parse the filename: it may be of the form "filename;n" in order to
 420     // specify the nth icon in the file.
 421     //
 422     // For the moment, ignore the issue of possible semicolons in the
 423     // filename.
 424     int iconIndex = 0;
 425     wxString nameReal(name);
 426     wxString strIconIndex = name.AfterLast(wxT(';'));
 427     if (strIconIndex != name)
 428     {
 429         iconIndex = wxAtoi(strIconIndex);
 430         nameReal = name.BeforeLast(wxT(';'));
 431     }
 432
 433 #if 0
 434     // If we don't know what size icon we're looking for,
 435     // try to find out what's there.
 436     // Unfortunately this doesn't work, because ExtractIconEx
 437     // will scale the icon to the 'desired' size, even if that
 438     // size of icon isn't explicitly stored. So we would have
 439     // to parse the icon file outselves.
 440     if ( desiredWidth == -1 &&
 441          desiredHeight == -1)
 442     {
 443         // Try loading a large icon first
 444         if ( ::ExtractIconEx(nameReal, iconIndex, &hicon, NULL, 1) == 1)
 445         {
 446         }
 447         // Then try loading a small icon
 448         else if ( ::ExtractIconEx(nameReal, iconIndex, NULL, &hicon, 1) == 1)
 449         {
 450         }
 451     }
 452     else
 453 #endif
 454         // were we asked for a large icon?
 455     if ( desiredWidth == ::GetSystemMetrics(SM_CXICON) &&
 456          desiredHeight == ::GetSystemMetrics(SM_CYICON) )
 457     {
 458         // get the specified large icon from file
 459         if ( !::ExtractIconEx(nameReal, iconIndex, &hicon, NULL, 1) )
 460         {
 461             // it is not an error, but it might still be useful to be informed
 462             // about it optionally
 463             wxLogTrace(_T("iconload"),
 464                        _T("No large icons found in the file '%s'."),
 465                        name.c_str());
 466         }
 467     }
 468     else if ( desiredWidth == ::GetSystemMetrics(SM_CXSMICON) &&
 469               desiredHeight == ::GetSystemMetrics(SM_CYSMICON) )
 470     {
 471         // get the specified small icon from file
 472         if ( !::ExtractIconEx(nameReal, iconIndex, NULL, &hicon, 1) )
 473         {
 474             wxLogTrace(_T("iconload"),
 475                        _T("No small icons found in the file '%s'."),
 476                        name.c_str());
 477         }
 478     }
 479     //else: not standard size, load below
 480
 481 #ifndef __WXWINCE__
 482     if ( !hicon )
 483     {
 484         // take any size icon from the file by index
 485         hicon = ::ExtractIcon(wxGetInstance(), nameReal, iconIndex);
 486     }
 487 #endif
 488
 489     if ( !hicon )
 490     {
 491         wxLogSysError(_T("Failed to load icon from the file '%s'"),
 492                       name.c_str());
 493
 494         return false;
 495     }
 496
 497     size = wxGetHiconSize(hicon);
 498
 499     if ( (desiredWidth != -1 && desiredWidth != size.x) ||
 500          (desiredHeight != -1 && desiredHeight != size.y) )
 501     {
 502         wxLogTrace(_T("iconload"),
 503                    _T("Returning false from wxICOFileHandler::Load because of the size mismatch: actual (%d, %d), requested (%d, %d)"),
 504                    size.x, size.y,
 505                    desiredWidth, desiredHeight);
 506
 507         ::DestroyIcon(hicon);
 508
 509         return false;
 510     }
 511
 512     icon->SetHICON((WXHICON)hicon);
 513     icon->SetSize(size.x, size.y);
 514
 515     return icon->Ok();
 516 }
 517
 518 bool wxICOResourceHandler::LoadIcon(wxIcon *icon,
 519                                     const wxString& name,
 520                                     long WXUNUSED(flags),
 521                                     int desiredWidth, int desiredHeight)
 522 {
 523     HICON hicon;
 524
 525     // do we need the icon of the specific size or would any icon do?
 526     bool hasSize = desiredWidth != -1 || desiredHeight != -1;
 527
 528     wxASSERT_MSG( !hasSize || (desiredWidth != -1 && desiredHeight != -1),
 529                   _T("width and height should be either both -1 or not") );
 530
 531     // try to load the icon from this program first to allow overriding the
 532     // standard icons (although why one would want to do it considering that
 533     // we already have wxApp::GetStdIcon() is unclear)
 534
 535     // note that we can't just always call LoadImage() because it seems to do
 536     // some icon rescaling internally which results in very ugly 16x16 icons
 537     if ( hasSize )
 538     {
 539         hicon = (HICON)::LoadImage(wxGetInstance(), name, IMAGE_ICON,
 540                                     desiredWidth, desiredHeight,
 541                                     LR_DEFAULTCOLOR);
 542     }
 543     else
 544     {
 545         hicon = ::LoadIcon(wxGetInstance(), name);
 546     }
 547
 548     // next check if it's not a standard icon
 549 #ifndef __WXWINCE__
 550     if ( !hicon && !hasSize )
 551     {
 552         static const struct
 553         {
 554             const wxChar *name;
 555             LPTSTR id;
 556         } stdIcons[] =
 557         {
 558             { wxT("wxICON_QUESTION"),   IDI_QUESTION    },
 559             { wxT("wxICON_WARNING"),    IDI_EXCLAMATION },
 560             { wxT("wxICON_ERROR"),      IDI_HAND        },
 561             { wxT("wxICON_INFORMATION"),       IDI_ASTERISK    },
 562         };
 563
 564         for ( size_t nIcon = 0; !hicon && nIcon < WXSIZEOF(stdIcons); nIcon++ )
 565         {
 566             if ( name == stdIcons[nIcon].name )
 567             {
 568                 hicon = ::LoadIcon((HINSTANCE)NULL, stdIcons[nIcon].id);
 569             }
 570         }
 571     }
 572 #endif
 573
 574     wxSize size = wxGetHiconSize(hicon);
 575     icon->SetSize(size.x, size.y);
 576
 577     icon->SetHICON((WXHICON)hicon);
 578
 579     return icon->Ok();
 580 }
 581
 582 // ----------------------------------------------------------------------------
 583 // private functions
 584 // ----------------------------------------------------------------------------
 585
 586 wxSize wxGetHiconSize(HICON hicon)
 587 {
 588     // default icon size on this hardware
 589     // usually 32x32 but can be other (smaller) on pocket devices
 590     wxSize size(::GetSystemMetrics(SM_CXICON), ::GetSystemMetrics(SM_CYICON));
 591
 592 #ifndef __WXWINCE__
 593     if ( hicon && wxGetOsVersion() != wxWIN32S )
 594     {
 595         ICONINFO info;
 596         if ( !::GetIconInfo(hicon, &info) )
 597         {
 598             wxLogLastError(wxT("GetIconInfo"));
 599         }
 600         else
 601         {
 602             HBITMAP hbmp = info.hbmMask;
 603             if ( hbmp )
 604             {
 605                 BITMAP bm;
 606                 if ( ::GetObject(hbmp, sizeof(BITMAP), (LPSTR) &bm) )
 607                 {
 608                     size = wxSize(bm.bmWidth, bm.bmHeight);
 609                 }
 610
 611                 ::DeleteObject(info.hbmMask);
 612             }
 613             if ( info.hbmColor )
 614                 ::DeleteObject(info.hbmColor);
 615         }
 616     }
 617 #else
 618     wxUnusedVar(hicon);
 619 #endif
 620     return size;
 621 }
 622
 623 #endif // __WXMICROWIN__
 624
 625 #ifdef __WXWINCE__
 626 // Used in wxBMPFileHandler::LoadFile
 627 HBITMAP wxLoadBMP(const wxString& filename)
 628 {
 629   wxFile file;
 630   if(!file.Open(filename))
 631         return 0;
 632
 633     // The first part of the file contains the file header.
 634   // This will tell us if it is a bitmap, how big the header is, and how big
 635     // the file is. The header size in the file header includes the color table.
 636   BITMAPFILEHEADER BmpFileHdr;
 637   BITMAPINFO *pBmpInfo = (BITMAPINFO*)malloc(sizeof(BITMAPINFO)+255*sizeof(RGBQUAD));
 638   BYTE* pBits = 0;
 639   HBITMAP hBitmap = 0;
 640
 641   if(file.Read(&BmpFileHdr, sizeof(BmpFileHdr))==sizeof(BmpFileHdr)
 642     && !strncmp((char*)&BmpFileHdr.bfType,"BM",2)
 643     && file.Read(pBmpInfo, sizeof(BITMAPINFOHEADER))==sizeof(BITMAPINFOHEADER)
 644     && pBmpInfo->bmiHeader.biSize == sizeof(BITMAPINFOHEADER)) {
 645
 646
 647       unsigned int nColors = pBmpInfo->bmiHeader.biClrUsed ?
 648       pBmpInfo->bmiHeader.biClrUsed : 1 << pBmpInfo->bmiHeader.biBitCount;
 649     if (nColors < 1
 650       || file.Read(pBmpInfo->bmiColors, nColors * sizeof(RGBQUAD))
 651         == (off_t)(nColors * sizeof(RGBQUAD))) {
 652
 653       // So how big the bitmap surface is.
 654       int nBitsSize = BmpFileHdr.bfSize - BmpFileHdr.bfOffBits;
 655
 656         // Allocate the memory for the bits and read the bits from the file.
 657       pBits = (BYTE*) malloc(nBitsSize*2);
 658       if (pBits) {
 659         // Seek to the bits in the file.
 660         file.Seek(BmpFileHdr.bfOffBits);
 661
 662         // read the bits
 663         if(file.Read(pBits, nBitsSize)==nBitsSize) {
 664           // Everything went OK.
 665           pBmpInfo->bmiHeader.biSizeImage = nBitsSize;
 666
 667           //HBITMAP hBitmap=SetBitmap((LPBITMAPINFO)pBmpInfo, pBits);
 668             DWORD dwBitmapInfoSize = sizeof(BITMAPINFO) + nColors*sizeof(RGBQUAD);
 669
 670             // Create a DC which will be used to get DIB, then create DIBsection
 671             HDC hDC = ::GetDC(NULL);
 672           if (hDC) {
 673             LPVOID bits;
 674             hBitmap = CreateDIBSection(hDC, (const BITMAPINFO*) pBmpInfo,
 675               DIB_RGB_COLORS, &bits, NULL, 0);
 676             ReleaseDC(0,hDC);
 677
 678             if (hBitmap) {
 679               DWORD dwImageSize = pBmpInfo->bmiHeader.biSizeImage;
 680               if (dwImageSize == 0) {
 681                 int nBytesPerLine = pBmpInfo->bmiHeader.biWidth * pBmpInfo->bmiHeader.biBitCount;
 682                 nBytesPerLine = ( (nBytesPerLine + 31) & (~31) ) / 8;
 683                 dwImageSize = nBytesPerLine * pBmpInfo->bmiHeader.biHeight;
 684               }
 685               memcpy(bits, pBits, dwImageSize);
 686             }
 687           }
 688         }
 689       }
 690     }
 691   }
 692
 693   if(pBmpInfo)
 694     free(pBmpInfo);
 695   if(pBits)
 696       free(pBits);
 697
 698   return hBitmap;
 699 }
 700 #endif
 701