src/msw/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        bitmap.cpp
   3 // Purpose:     wxBitmap
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "bitmap.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include <stdio.h>
  33
  34     #include "wx/list.h"
  35     #include "wx/utils.h"
  36     #include "wx/app.h"
  37     #include "wx/palette.h"
  38     #include "wx/dcmemory.h"
  39     #include "wx/bitmap.h"
  40     #include "wx/icon.h"
  41 #endif
  42
  43 #include "wx/msw/private.h"
  44 #include "wx/log.h"
  45
  46 #include "wx/msw/dib.h"
  47 #include "wx/image.h"
  48
  49 // ----------------------------------------------------------------------------
  50 // macros
  51 // ----------------------------------------------------------------------------
  52
  53     IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
  54     IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
  55
  56     IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject)
  57
  58 // ============================================================================
  59 // implementation
  60 // ============================================================================
  61
  62 // ----------------------------------------------------------------------------
  63 // wxBitmapRefData
  64 // ----------------------------------------------------------------------------
  65
  66 wxBitmapRefData::wxBitmapRefData()
  67 {
  68     m_quality = 0;
  69     m_selectedInto = NULL;
  70     m_numColors = 0;
  71     m_bitmapMask = NULL;
  72     m_hBitmap = (WXHBITMAP) NULL;
  73 }
  74
  75 void wxBitmapRefData::Free()
  76 {
  77     wxASSERT_MSG( !m_selectedInto,
  78                   wxT("deleting bitmap still selected into wxMemoryDC") );
  79
  80     if ( m_hBitmap)
  81     {
  82         if ( !::DeleteObject((HBITMAP)m_hBitmap) )
  83         {
  84             wxLogLastError("DeleteObject(hbitmap)");
  85         }
  86     }
  87
  88     delete m_bitmapMask;
  89     m_bitmapMask = NULL;
  90 }
  91
  92 // ----------------------------------------------------------------------------
  93 // wxBitmap creation
  94 // ----------------------------------------------------------------------------
  95
  96 // this function should be called from all wxBitmap ctors
  97 void wxBitmap::Init()
  98 {
  99     // m_refData = NULL; done in the base class ctor
 100
 101     if ( wxTheBitmapList )
 102         wxTheBitmapList->AddBitmap(this);
 103 }
 104
 105 #ifdef __WIN32__
 106
 107 bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
 108 {
 109     // it may be either HICON or HCURSOR
 110     HICON hicon = (HICON)icon.GetHandle();
 111
 112     ICONINFO iconInfo;
 113     if ( !::GetIconInfo(hicon, &iconInfo) )
 114     {
 115         wxLogLastError("GetIconInfo");
 116
 117         return FALSE;
 118     }
 119
 120     wxBitmapRefData *refData = new wxBitmapRefData;
 121     m_refData = refData;
 122
 123     int w = icon.GetWidth(),
 124         h = icon.GetHeight();
 125
 126     refData->m_width = w;
 127     refData->m_height = h;
 128     refData->m_depth = wxDisplayDepth();
 129
 130     refData->m_hBitmap = (WXHBITMAP)iconInfo.hbmColor;
 131
 132     // the mask returned by GetIconInfo() is inversed compared to the usual
 133     // wxWin convention
 134     HBITMAP hbmpMask = ::CreateBitmap(w, h, 1, 1, 0);
 135
 136     // the icons mask is opposite to the usual wxWin convention
 137     HDC dcSrc = ::CreateCompatibleDC(NULL);
 138     HDC dcDst = ::CreateCompatibleDC(NULL);
 139     (void)SelectObject(dcSrc, iconInfo.hbmMask);
 140     (void)SelectObject(dcDst, hbmpMask);
 141
 142     HBRUSH brush = ::CreateSolidBrush(RGB(255, 255, 255));
 143     RECT rect = { 0, 0, w, h };
 144     FillRect(dcDst, &rect, brush);
 145
 146     BitBlt(dcDst, 0, 0, w, h, dcSrc, 0, 0, SRCINVERT);
 147
 148     SelectObject(dcDst, NULL);
 149     SelectObject(dcSrc, NULL);
 150     DeleteDC(dcDst);
 151     DeleteDC(dcSrc);
 152
 153     refData->m_bitmapMask = new wxMask((WXHBITMAP)hbmpMask);
 154
 155 #if WXWIN_COMPATIBILITY_2
 156     refData->m_ok = TRUE;
 157 #endif // WXWIN_COMPATIBILITY_2
 158
 159     return TRUE;
 160 }
 161
 162 #endif // Win32
 163
 164 bool wxBitmap::CopyFromCursor(const wxCursor& cursor)
 165 {
 166     UnRef();
 167
 168     if ( !cursor.Ok() )
 169         return FALSE;
 170
 171 #ifdef __WIN16__
 172     wxFAIL_MSG( _T("don't know how to convert cursor to bitmap") );
 173
 174     return FALSE;
 175 #else
 176     return CopyFromIconOrCursor(cursor);
 177 #endif // Win16
 178 }
 179
 180 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 181 {
 182     UnRef();
 183
 184     if ( !icon.Ok() )
 185         return FALSE;
 186
 187     // GetIconInfo() doesn't exist under Win16 and I don't know any other way
 188     // to create a bitmap from icon there - but using this way we won't have
 189     // the mask (FIXME)
 190 #ifdef __WIN16__
 191     int width = icon.GetWidth(),
 192         height = icon.GetHeight();
 193
 194     // copy the icon to the bitmap
 195     ScreenHDC hdcScreen;
 196     HDC hdc = ::CreateCompatibleDC(hdcScreen);
 197     HBITMAP hbitmap = ::CreateCompatibleBitmap(hdcScreen, width, height);
 198     HBITMAP hbmpOld = (HBITMAP)::SelectObject(hdc, hbitmap);
 199
 200     ::DrawIcon(hdc, 0, 0, GetHiconOf(icon));
 201
 202     ::SelectObject(hdc, hbmpOld);
 203     ::DeleteDC(hdc);
 204
 205     wxBitmapRefData *refData = new wxBitmapRefData;
 206     m_refData = refData;
 207
 208     refData->m_width = width;
 209     refData->m_height = height;
 210     refData->m_depth = wxDisplayDepth();
 211
 212     refData->m_hBitmap = (WXHBITMAP)hbitmap;
 213
 214 #if WXWIN_COMPATIBILITY_2
 215     refData->m_ok = TRUE;
 216 #endif // WXWIN_COMPATIBILITY_2
 217
 218     return TRUE;
 219 #else // Win32
 220     return CopyFromIconOrCursor(icon);
 221 #endif // Win16/Win32
 222 }
 223
 224 wxBitmap::~wxBitmap()
 225 {
 226     if (wxTheBitmapList)
 227         wxTheBitmapList->DeleteObject(this);
 228 }
 229
 230 wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
 231 {
 232     Init();
 233
 234     wxBitmapRefData *refData = new wxBitmapRefData;
 235     m_refData = refData;
 236
 237     refData->m_width = the_width;
 238     refData->m_height = the_height;
 239     refData->m_depth = no_bits;
 240     refData->m_numColors = 0;
 241     refData->m_selectedInto = NULL;
 242
 243     HBITMAP hbmp = ::CreateBitmap(the_width, the_height, 1, no_bits, bits);
 244     if ( !hbmp )
 245     {
 246         wxLogLastError("CreateBitmap");
 247     }
 248
 249     SetHBITMAP((WXHBITMAP)hbmp);
 250 }
 251
 252 // Create from XPM data
 253 wxBitmap::wxBitmap(char **data, wxControl *WXUNUSED(anItem))
 254 {
 255     Init();
 256
 257     (void)Create((void *)data, wxBITMAP_TYPE_XPM_DATA, 0, 0, 0);
 258 }
 259
 260 wxBitmap::wxBitmap(int w, int h, int d)
 261 {
 262     Init();
 263
 264     (void)Create(w, h, d);
 265 }
 266
 267 wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
 268 {
 269     Init();
 270
 271     (void)Create(data, type, width, height, depth);
 272 }
 273
 274 wxBitmap::wxBitmap(const wxString& filename, long type)
 275 {
 276     Init();
 277
 278     LoadFile(filename, (int)type);
 279 }
 280
 281 bool wxBitmap::Create(int w, int h, int d)
 282 {
 283     UnRef();
 284
 285     m_refData = new wxBitmapRefData;
 286
 287     GetBitmapData()->m_width = w;
 288     GetBitmapData()->m_height = h;
 289     GetBitmapData()->m_depth = d;
 290
 291     HBITMAP hbmp;
 292
 293     if ( d > 0 )
 294     {
 295         hbmp = ::CreateBitmap(w, h, 1, d, NULL);
 296         if ( !hbmp )
 297         {
 298             wxLogLastError("CreateBitmap");
 299         }
 300     }
 301     else
 302     {
 303         ScreenHDC dc;
 304         hbmp = ::CreateCompatibleBitmap(dc, w, h);
 305         if ( !hbmp )
 306         {
 307             wxLogLastError("CreateCompatibleBitmap");
 308         }
 309
 310         GetBitmapData()->m_depth = wxDisplayDepth();
 311     }
 312
 313     SetHBITMAP((WXHBITMAP)hbmp);
 314
 315 #if WXWIN_COMPATIBILITY_2
 316     GetBitmapData()->m_ok = hbmp != 0;
 317 #endif // WXWIN_COMPATIBILITY_2
 318
 319     return Ok();
 320 }
 321
 322 bool wxBitmap::LoadFile(const wxString& filename, long type)
 323 {
 324     UnRef();
 325
 326     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 327
 328     if ( handler )
 329     {
 330         m_refData = new wxBitmapRefData;
 331
 332         return handler->LoadFile(this, filename, type, -1, -1);
 333     }
 334     else
 335     {
 336         wxImage image;
 337         if ( !image.LoadFile( filename, type ) || !image.Ok() )
 338             return FALSE;
 339
 340         *this = image.ConvertToBitmap();
 341
 342         return TRUE;
 343     }
 344 }
 345
 346 bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
 347 {
 348     UnRef();
 349
 350     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 351
 352     if ( !handler )
 353     {
 354         wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for "
 355                        "type %d defined."), type);
 356
 357         return FALSE;
 358     }
 359
 360     m_refData = new wxBitmapRefData;
 361
 362     return handler->Create(this, data, type, width, height, depth);
 363 }
 364
 365 bool wxBitmap::SaveFile(const wxString& filename, int type, const wxPalette *palette)
 366 {
 367     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 368
 369     if ( handler )
 370     {
 371         return handler->SaveFile(this, filename, type, palette);
 372     }
 373     else
 374     {
 375         // FIXME what about palette? shouldn't we use it?
 376         wxImage image( *this );
 377         if (!image.Ok())
 378             return FALSE;
 379
 380         return image.SaveFile( filename, type );
 381     }
 382 }
 383
 384 // ----------------------------------------------------------------------------
 385 // wxBitmap accessors
 386 // ----------------------------------------------------------------------------
 387
 388 void wxBitmap::SetQuality(int q)
 389 {
 390     EnsureHasData();
 391
 392     GetBitmapData()->m_quality = q;
 393 }
 394
 395 #if WXWIN_COMPATIBILITY_2
 396 void wxBitmap::SetOk(bool isOk)
 397 {
 398     EnsureHasData();
 399
 400     GetBitmapData()->m_ok = isOk;
 401 }
 402 #endif // WXWIN_COMPATIBILITY_2
 403
 404 void wxBitmap::SetPalette(const wxPalette& palette)
 405 {
 406     EnsureHasData();
 407
 408     GetBitmapData()->m_bitmapPalette = palette;
 409 }
 410
 411 void wxBitmap::SetMask(wxMask *mask)
 412 {
 413     EnsureHasData();
 414
 415     GetBitmapData()->m_bitmapMask = mask;
 416 }
 417
 418 // Creates a bitmap that matches the device context, from
 419 // an arbitray bitmap. At present, the original bitmap must have an
 420 // associated palette. TODO: use a default palette if no palette exists.
 421 // Contributed by Frederic Villeneuve <frederic.villeneuve@natinst.com>
 422 wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const
 423 {
 424     wxMemoryDC      memDC;
 425     wxBitmap        tmpBitmap(this->GetWidth(), this->GetHeight(), dc.GetDepth());
 426     HPALETTE        hPal = (HPALETTE) NULL;
 427     LPBITMAPINFO    lpDib;
 428     void            *lpBits = (void*) NULL;
 429
 430     if( GetPalette() && GetPalette()->Ok() )
 431     {
 432         tmpBitmap.SetPalette(*GetPalette());
 433         memDC.SelectObject(tmpBitmap);
 434         memDC.SetPalette(*GetPalette());
 435         hPal = (HPALETTE)GetPalette()->GetHPALETTE();
 436     }
 437     else
 438     {
 439         hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE);
 440         wxPalette palette;
 441         palette.SetHPALETTE( (WXHPALETTE)hPal );
 442         tmpBitmap.SetPalette( palette );
 443         memDC.SelectObject(tmpBitmap);
 444         memDC.SetPalette( palette );
 445     }
 446
 447     // set the height negative because in a DIB the order of the lines is
 448     // reversed
 449     if ( !wxCreateDIB(GetWidth(), -GetHeight(), GetDepth(), hPal, &lpDib) )
 450     {
 451         return wxNullBitmap;
 452     }
 453
 454     lpBits = malloc(lpDib->bmiHeader.biSizeImage);
 455
 456     ::GetBitmapBits(GetHbitmap(), lpDib->bmiHeader.biSizeImage, lpBits);
 457
 458     ::SetDIBitsToDevice(GetHdcOf(memDC), 0, 0,
 459                         GetWidth(), GetHeight(),
 460                         0, 0, 0, GetHeight(),
 461                         lpBits, lpDib, DIB_RGB_COLORS);
 462
 463     free(lpBits);
 464
 465     wxFreeDIB(lpDib);
 466
 467     return tmpBitmap;
 468 }
 469
 470 // ----------------------------------------------------------------------------
 471 // wxMask
 472 // ----------------------------------------------------------------------------
 473
 474 wxMask::wxMask()
 475 {
 476     m_maskBitmap = 0;
 477 }
 478
 479 // Construct a mask from a bitmap and a colour indicating
 480 // the transparent area
 481 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
 482 {
 483     m_maskBitmap = 0;
 484     Create(bitmap, colour);
 485 }
 486
 487 // Construct a mask from a bitmap and a palette index indicating
 488 // the transparent area
 489 wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
 490 {
 491     m_maskBitmap = 0;
 492     Create(bitmap, paletteIndex);
 493 }
 494
 495 // Construct a mask from a mono bitmap (copies the bitmap).
 496 wxMask::wxMask(const wxBitmap& bitmap)
 497 {
 498     m_maskBitmap = 0;
 499     Create(bitmap);
 500 }
 501
 502 wxMask::~wxMask()
 503 {
 504     if ( m_maskBitmap )
 505         ::DeleteObject((HBITMAP) m_maskBitmap);
 506 }
 507
 508 // Create a mask from a mono bitmap (copies the bitmap).
 509 bool wxMask::Create(const wxBitmap& bitmap)
 510 {
 511     if ( m_maskBitmap )
 512     {
 513         ::DeleteObject((HBITMAP) m_maskBitmap);
 514         m_maskBitmap = 0;
 515     }
 516     if (!bitmap.Ok() || bitmap.GetDepth() != 1)
 517     {
 518         return FALSE;
 519     }
 520     m_maskBitmap = (WXHBITMAP) CreateBitmap(
 521                                             bitmap.GetWidth(),
 522                                             bitmap.GetHeight(),
 523                                             1, 1, 0
 524                                            );
 525     HDC srcDC = CreateCompatibleDC(0);
 526     SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
 527     HDC destDC = CreateCompatibleDC(0);
 528     SelectObject(destDC, (HBITMAP) m_maskBitmap);
 529     BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY);
 530     SelectObject(srcDC, 0);
 531     DeleteDC(srcDC);
 532     SelectObject(destDC, 0);
 533     DeleteDC(destDC);
 534     return TRUE;
 535 }
 536
 537 // Create a mask from a bitmap and a palette index indicating
 538 // the transparent area
 539 bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
 540 {
 541     if ( m_maskBitmap )
 542     {
 543         ::DeleteObject((HBITMAP) m_maskBitmap);
 544         m_maskBitmap = 0;
 545     }
 546     if (bitmap.Ok() && bitmap.GetPalette()->Ok())
 547     {
 548         unsigned char red, green, blue;
 549         if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue))
 550         {
 551             wxColour transparentColour(red, green, blue);
 552             return Create(bitmap, transparentColour);
 553         }
 554     }
 555     return FALSE;
 556 }
 557
 558 // Create a mask from a bitmap and a colour indicating
 559 // the transparent area
 560 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
 561 {
 562     if ( m_maskBitmap )
 563     {
 564         ::DeleteObject((HBITMAP) m_maskBitmap);
 565         m_maskBitmap = 0;
 566     }
 567     if (!bitmap.Ok())
 568     {
 569         return FALSE;
 570     }
 571
 572     // scan the bitmap for the transparent colour and set
 573     // the corresponding pixels in the mask to BLACK and
 574     // the rest to WHITE
 575     COLORREF maskColour = RGB(colour.Red(), colour.Green(), colour.Blue());
 576     m_maskBitmap = (WXHBITMAP) ::CreateBitmap(
 577             bitmap.GetWidth(),
 578             bitmap.GetHeight(),
 579             1, 1, 0
 580                                              );
 581     HDC srcDC = ::CreateCompatibleDC(0);
 582     ::SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
 583     HDC destDC = ::CreateCompatibleDC(0);
 584     ::SelectObject(destDC, (HBITMAP) m_maskBitmap);
 585
 586     // this is not very efficient, but I can't think
 587     // of a better way of doing it
 588     for (int w = 0; w < bitmap.GetWidth(); w++)
 589     {
 590         for (int h = 0; h < bitmap.GetHeight(); h++)
 591         {
 592             COLORREF col = GetPixel(srcDC, w, h);
 593             if (col == maskColour)
 594             {
 595                 ::SetPixel(destDC, w, h, RGB(0, 0, 0));
 596             }
 597             else
 598             {
 599                 ::SetPixel(destDC, w, h, RGB(255, 255, 255));
 600             }
 601         }
 602     }
 603     ::SelectObject(srcDC, 0);
 604     ::DeleteDC(srcDC);
 605     ::SelectObject(destDC, 0);
 606     ::DeleteDC(destDC);
 607     return TRUE;
 608 }
 609
 610 // ----------------------------------------------------------------------------
 611 // wxBitmapHandler
 612 // ----------------------------------------------------------------------------
 613
 614 bool wxBitmapHandler::Create(wxGDIImage *image,
 615                              void *data,
 616                              long flags,
 617                              int width, int height, int depth)
 618 {
 619     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
 620
 621     return bitmap ? Create(bitmap, data, width, height, depth) : FALSE;
 622 }
 623
 624 bool wxBitmapHandler::Load(wxGDIImage *image,
 625                            const wxString& name,
 626                            long flags,
 627                            int width, int height)
 628 {
 629     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
 630
 631     return bitmap ? LoadFile(bitmap, name, flags, width, height) : FALSE;
 632 }
 633
 634 bool wxBitmapHandler::Save(wxGDIImage *image,
 635                            const wxString& name,
 636                            int type)
 637 {
 638     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
 639
 640     return bitmap ? SaveFile(bitmap, name, type) : FALSE;
 641 }
 642
 643 bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
 644                              void *WXUNUSED(data),
 645                              long WXUNUSED(type),
 646                              int WXUNUSED(width),
 647                              int WXUNUSED(height),
 648                              int WXUNUSED(depth))
 649 {
 650     return FALSE;
 651 }
 652
 653 bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
 654                                const wxString& WXUNUSED(name),
 655                                long WXUNUSED(type),
 656                                int WXUNUSED(desiredWidth),
 657                                int WXUNUSED(desiredHeight))
 658 {
 659     return FALSE;
 660 }
 661
 662 bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
 663                                const wxString& WXUNUSED(name),
 664                                int WXUNUSED(type),
 665                                const wxPalette *WXUNUSED(palette))
 666 {
 667     return FALSE;
 668 }
 669
 670 // ----------------------------------------------------------------------------
 671 // DIB functions
 672 // ----------------------------------------------------------------------------
 673
 674 bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
 675                  HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
 676 {
 677    unsigned long   i, headerSize;
 678    LPBITMAPINFO    lpDIBheader = NULL;
 679    LPPALETTEENTRY  lpPe = NULL;
 680
 681
 682    // Allocate space for a DIB header
 683    headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
 684    lpDIBheader = (BITMAPINFO *) malloc(headerSize);
 685    lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));
 686
 687    GetPaletteEntries(hPal, 0, 256, lpPe);
 688
 689    memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER));
 690
 691    // Fill in the static parts of the DIB header
 692    lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 693    lpDIBheader->bmiHeader.biWidth = xSize;
 694    lpDIBheader->bmiHeader.biHeight = ySize;
 695    lpDIBheader->bmiHeader.biPlanes = 1;
 696
 697    // this value must be 1, 4, 8 or 24 so PixelDepth can only be
 698    lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel);
 699    lpDIBheader->bmiHeader.biCompression = BI_RGB;
 700    lpDIBheader->bmiHeader.biSizeImage = xSize * abs(ySize) * bitsPerPixel >> 3;
 701    lpDIBheader->bmiHeader.biClrUsed = 256;
 702
 703
 704    // Initialize the DIB palette
 705    for (i = 0; i < 256; i++) {
 706       lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags;
 707       lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed;
 708       lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen;
 709       lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue;
 710    }
 711
 712    *lpDIBHeader = lpDIBheader;
 713
 714    return TRUE;
 715 }
 716
 717 void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
 718 {
 719     free(lpDIBHeader);
 720 }
 721
 722