src/common/image.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        image.cpp
   3 // Purpose:     wxImage
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "image.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #ifdef __BORLANDC__
  18 #pragma hdrstop
  19 #endif
  20
  21 #include "wx/image.h"
  22 #include "wx/bitmap.h"
  23 #include "wx/debug.h"
  24 #include "wx/log.h"
  25 #include "../png/png.h"
  26 #include "wx/filefn.h"
  27
  28 #ifdef __WXGTK__
  29 #include "gdk/gdkprivate.h"
  30 #include "gdk/gdkx.h"
  31 #endif
  32
  33 //-----------------------------------------------------------------------------
  34 // wxImage
  35 //-----------------------------------------------------------------------------
  36
  37 class wxImageRefData: public wxObjectRefData
  38 {
  39
  40 public:
  41   wxImageRefData(void);
  42   ~wxImageRefData(void);
  43
  44   int             m_width;
  45   int             m_height;
  46   unsigned char  *m_data;
  47   bool            m_hasMask;
  48   unsigned char   m_maskRed,m_maskGreen,m_maskBlue;
  49   bool            m_ok;
  50 };
  51
  52 wxImageRefData::wxImageRefData(void)
  53 {
  54     m_width = 0;
  55     m_height = 0;
  56     m_data = (unsigned char*) NULL;
  57     m_ok = FALSE;
  58     m_maskRed = 0;
  59     m_maskGreen = 0;
  60     m_maskBlue = 0;
  61     m_hasMask = FALSE;
  62 }
  63
  64 wxImageRefData::~wxImageRefData(void)
  65 {
  66     if (m_data) free( m_data );
  67 }
  68
  69 wxList wxImage::sm_handlers;
  70
  71 //-----------------------------------------------------------------------------
  72
  73 #define M_IMGDATA ((wxImageRefData *)m_refData)
  74
  75 #if !USE_SHARED_LIBRARIES
  76 IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
  77 #endif
  78
  79 wxImage::wxImage()
  80 {
  81 }
  82
  83 wxImage::wxImage( int width, int height )
  84 {
  85     Create( width, height );
  86 }
  87
  88 wxImage::wxImage( const wxString& name, long type )
  89 {
  90     LoadFile( name, type );
  91 }
  92
  93 wxImage::wxImage( const wxImage& image )
  94 {
  95     Ref(image);
  96 }
  97
  98 wxImage::wxImage( const wxImage* image )
  99 {
 100     if (image) Ref(*image);
 101 }
 102
 103 void wxImage::Create( int width, int height )
 104 {
 105     m_refData = new wxImageRefData();
 106
 107     M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 );
 108     if (M_IMGDATA->m_data)
 109     {
 110         for (int l = 0; l < width*height*3; l++) M_IMGDATA->m_data[l] = 0;
 111
 112         M_IMGDATA->m_width = width;
 113         M_IMGDATA->m_height = height;
 114         M_IMGDATA->m_ok = TRUE;
 115     }
 116     else
 117     {
 118         UnRef();
 119     }
 120 }
 121
 122 void wxImage::Destroy()
 123 {
 124     UnRef();
 125 }
 126
 127 wxImage wxImage::Scale( int width, int height )
 128 {
 129     wxImage image;
 130
 131     wxCHECK_MSG( Ok(), image, "invlaid image" );
 132
 133     wxCHECK_MSG( (width > 0) && (height > 0), image, "invalid image size" );
 134
 135     image.Create( width, height );
 136
 137     char unsigned *data = image.GetData();
 138
 139     wxCHECK_MSG( data, image, "unable to create image" );
 140
 141     if (M_IMGDATA->m_hasMask)
 142         image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 143
 144     double xscale = (double)width / (double)M_IMGDATA->m_width;
 145     double yscale = (double)height / (double)M_IMGDATA->m_height;
 146
 147     for (int j = 0; j < height; j++)
 148     {
 149         for (int i = 0; i < width; i++)
 150         {
 151             int new_pos = 3*(j*width + i);
 152             int old_pos = 3*((long)(j/yscale)*M_IMGDATA->m_width + (long)(i/xscale));
 153             data[ new_pos   ] = M_IMGDATA->m_data[ old_pos   ];
 154             data[ new_pos+1 ] = M_IMGDATA->m_data[ old_pos+1 ];
 155             data[ new_pos+2 ] = M_IMGDATA->m_data[ old_pos+2 ];
 156         }
 157     }
 158
 159     return image;
 160 }
 161
 162 void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
 163 {
 164     wxCHECK_RET( Ok(), "invalid image" );
 165
 166     int w = M_IMGDATA->m_width;
 167     int h = M_IMGDATA->m_height;
 168
 169     wxCHECK_RET( (x>=0) && (y>=0) && (x<w) && (y<h), "invalid image index" );
 170
 171     long pos = (y * w + x) * 3;
 172
 173     M_IMGDATA->m_data[ pos   ] = r;
 174     M_IMGDATA->m_data[ pos+1 ] = g;
 175     M_IMGDATA->m_data[ pos+2 ] = b;
 176 }
 177
 178 unsigned char wxImage::GetRed( int x, int y )
 179 {
 180     wxCHECK_MSG( Ok(), 0, "invalid image" );
 181
 182     int w = M_IMGDATA->m_width;
 183     int h = M_IMGDATA->m_height;
 184
 185     wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, "invalid image index" );
 186
 187     long pos = (y * w + x) * 3;
 188
 189     return M_IMGDATA->m_data[pos];
 190 }
 191
 192 unsigned char wxImage::GetGreen( int x, int y )
 193 {
 194     wxCHECK_MSG( Ok(), 0, "invalid image" );
 195
 196     int w = M_IMGDATA->m_width;
 197     int h = M_IMGDATA->m_height;
 198
 199     wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, "invalid image index" );
 200
 201     long pos = (y * w + x) * 3;
 202
 203     return M_IMGDATA->m_data[pos+1];
 204 }
 205
 206 unsigned char wxImage::GetBlue( int x, int y )
 207 {
 208     wxCHECK_MSG( Ok(), 0, "invalid image" );
 209
 210     int w = M_IMGDATA->m_width;
 211     int h = M_IMGDATA->m_height;
 212
 213     wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, "invalid image index" );
 214
 215     long pos = (y * w + x) * 3;
 216
 217     return M_IMGDATA->m_data[pos+2];
 218 }
 219
 220 bool wxImage::Ok() const
 221 {
 222     return (M_IMGDATA && M_IMGDATA->m_ok);
 223 }
 224
 225 char unsigned *wxImage::GetData() const
 226 {
 227     wxCHECK_MSG( Ok(), (char unsigned *)NULL, "invalid image" );
 228
 229     return M_IMGDATA->m_data;
 230 }
 231
 232 void wxImage::SetData( char unsigned *WXUNUSED(data) )
 233 {
 234     wxCHECK_RET( Ok(), "invalid image" );
 235 }
 236
 237 void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b )
 238 {
 239     wxCHECK_RET( Ok(), "invalid image" );
 240
 241     M_IMGDATA->m_maskRed = r;
 242     M_IMGDATA->m_maskGreen = g;
 243     M_IMGDATA->m_maskBlue = b;
 244     M_IMGDATA->m_hasMask = TRUE;
 245 }
 246
 247 unsigned char wxImage::GetMaskRed() const
 248 {
 249     wxCHECK_MSG( Ok(), 0, "invalid image" );
 250
 251     return M_IMGDATA->m_maskRed;
 252 }
 253
 254 unsigned char wxImage::GetMaskGreen() const
 255 {
 256     wxCHECK_MSG( Ok(), 0, "invalid image" );
 257
 258     return M_IMGDATA->m_maskGreen;
 259 }
 260
 261 unsigned char wxImage::GetMaskBlue() const
 262 {
 263     wxCHECK_MSG( Ok(), 0, "invalid image" );
 264
 265     return M_IMGDATA->m_maskBlue;
 266 }
 267
 268 void wxImage::SetMask( bool mask )
 269 {
 270     wxCHECK_RET( Ok(), "invalid image" );
 271
 272     M_IMGDATA->m_hasMask = mask;
 273 }
 274
 275 bool wxImage::HasMask() const
 276 {
 277     wxCHECK_MSG( Ok(), FALSE, "invalid image" );
 278
 279     return M_IMGDATA->m_hasMask;
 280 }
 281
 282 int wxImage::GetWidth() const
 283 {
 284     wxCHECK_MSG( Ok(), 0, "invalid image" );
 285
 286     return M_IMGDATA->m_width;
 287 }
 288
 289 int wxImage::GetHeight() const
 290 {
 291     wxCHECK_MSG( Ok(), 0, "invalid image" );
 292
 293     return M_IMGDATA->m_height;
 294 }
 295
 296 bool wxImage::LoadFile( const wxString& filename, long type )
 297 {
 298     UnRef();
 299
 300     if (!wxFileExists(filename))
 301     {
 302         wxLogWarning( "Image file does not exist." );
 303
 304         return FALSE;
 305     }
 306
 307     m_refData = new wxImageRefData;
 308
 309     wxImageHandler *handler = FindHandler(type);
 310
 311     if (handler == NULL)
 312     {
 313         wxLogWarning( "No image handler for type %d defined.", type );
 314
 315         return FALSE;
 316     }
 317
 318     return handler->LoadFile( this, filename );
 319 }
 320
 321 bool wxImage::SaveFile( const wxString& filename, int type )
 322 {
 323     wxCHECK_MSG( Ok(), FALSE, "invalid image" );
 324
 325     wxImageHandler *handler = FindHandler(type);
 326
 327     if (handler == NULL)
 328     {
 329       wxLogWarning( "No image handler for type %d defined.", type );
 330
 331       return FALSE;
 332     }
 333
 334     return handler->SaveFile( this, filename );
 335 }
 336
 337 void wxImage::AddHandler( wxImageHandler *handler )
 338 {
 339     sm_handlers.Append( handler );
 340 }
 341
 342 void wxImage::InsertHandler( wxImageHandler *handler )
 343 {
 344     sm_handlers.Insert( handler );
 345 }
 346
 347 bool wxImage::RemoveHandler( const wxString& name )
 348 {
 349     wxImageHandler *handler = FindHandler(name);
 350     if (handler)
 351     {
 352         sm_handlers.DeleteObject(handler);
 353         return TRUE;
 354     }
 355     else
 356         return FALSE;
 357 }
 358
 359 wxImageHandler *wxImage::FindHandler( const wxString& name )
 360 {
 361     wxNode *node = sm_handlers.First();
 362     while (node)
 363     {
 364         wxImageHandler *handler = (wxImageHandler*)node->Data();
 365         if (handler->GetName() == name) return handler;
 366         node = node->Next();
 367     }
 368     return (wxImageHandler *)NULL;
 369 }
 370
 371 wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
 372 {
 373     wxNode *node = sm_handlers.First();
 374     while (node)
 375     {
 376         wxImageHandler *handler = (wxImageHandler*)node->Data();
 377         if ( handler->GetExtension() == extension &&
 378             (bitmapType == -1 || handler->GetType() == bitmapType) )
 379         return handler;
 380         node = node->Next();
 381     }
 382     return (wxImageHandler*)NULL;
 383 }
 384
 385 wxImageHandler *wxImage::FindHandler( long bitmapType )
 386 {
 387     wxNode *node = sm_handlers.First();
 388     while (node)
 389     {
 390         wxImageHandler *handler = (wxImageHandler *)node->Data();
 391         if (handler->GetType() == bitmapType) return handler;
 392         node = node->Next();
 393     }
 394     return NULL;
 395 }
 396
 397 void wxImage::InitStandardHandlers()
 398 {
 399     AddHandler( new wxBMPHandler );
 400     AddHandler( new wxPNGHandler );
 401 }
 402
 403 void wxImage::CleanUpHandlers()
 404 {
 405     wxNode *node = sm_handlers.First();
 406     while (node)
 407     {
 408         wxImageHandler *handler = (wxImageHandler *)node->Data();
 409         wxNode *next = node->Next();
 410         delete handler;
 411         delete node;
 412         node = next;
 413     }
 414 }
 415
 416 //-----------------------------------------------------------------------------
 417 // wxImageHandler
 418 //-----------------------------------------------------------------------------
 419
 420 #if !USE_SHARED_LIBRARIES
 421 IMPLEMENT_DYNAMIC_CLASS(wxImageHandler,wxObject)
 422 #endif
 423
 424 bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), const wxString& WXUNUSED(name) )
 425 {
 426     return FALSE;
 427 }
 428
 429 bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), const wxString& WXUNUSED(name) )
 430 {
 431     return FALSE;
 432 }
 433
 434 //-----------------------------------------------------------------------------
 435 // wxPNGHandler
 436 //-----------------------------------------------------------------------------
 437
 438 #if !USE_SHARED_LIBRARIES
 439 IMPLEMENT_DYNAMIC_CLASS(wxPNGHandler,wxImageHandler)
 440 #endif
 441
 442 bool wxPNGHandler::LoadFile( wxImage *image, const wxString& name )
 443 {
 444    FILE               *f;
 445    png_structp         png_ptr;
 446    png_infop           info_ptr;
 447    unsigned char      *ptr, **lines, *ptr2;
 448    int                 transp,bit_depth,color_type,interlace_type;
 449    png_uint_32         width, height;
 450    unsigned int        i;
 451
 452    image->Destroy();
 453
 454    transp = 0;
 455    png_ptr = png_create_read_struct( PNG_LIBPNG_VER_STRING, NULL, NULL, NULL );
 456    if (!png_ptr) return FALSE;
 457
 458    info_ptr = png_create_info_struct( png_ptr );
 459    if (!info_ptr)
 460    {
 461      png_destroy_read_struct( &png_ptr, NULL, NULL );
 462      return FALSE;
 463    }
 464
 465    if (setjmp(png_ptr->jmpbuf))
 466    {
 467      png_destroy_read_struct( &png_ptr, &info_ptr, NULL );
 468      return FALSE;
 469    }
 470
 471    if (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
 472    {
 473      png_destroy_read_struct( &png_ptr, &info_ptr, NULL );
 474      return FALSE;
 475    }
 476
 477    f = fopen( name, "rb" );
 478    png_init_io( png_ptr, f );
 479
 480    png_read_info( png_ptr, info_ptr );
 481    png_get_IHDR( png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type, NULL, NULL );
 482
 483    if (color_type == PNG_COLOR_TYPE_PALETTE) png_set_expand( png_ptr );
 484
 485    png_set_strip_16( png_ptr );
 486    png_set_packing( png_ptr );
 487    if (png_get_valid( png_ptr, info_ptr, PNG_INFO_tRNS)) png_set_expand( png_ptr );
 488    png_set_filler( png_ptr, 0xff, PNG_FILLER_AFTER );
 489
 490    image->Create( width, height );
 491
 492    if (!image->Ok())
 493    {
 494      png_destroy_read_struct( &png_ptr, &info_ptr, NULL );
 495      return FALSE;
 496    }
 497
 498    lines = (unsigned char **)malloc( height * sizeof(unsigned char *) );
 499    if (lines == NULL)
 500    {
 501      image->Destroy();
 502      png_destroy_read_struct( &png_ptr, &info_ptr, NULL );
 503      return FALSE;
 504    }
 505
 506    for (i = 0; i < height; i++)
 507    {
 508      if ((lines[i] = (unsigned char *)malloc(width * (sizeof(unsigned char) * 4))) == NULL)
 509      {
 510        image->Destroy();
 511        for (unsigned int n = 0; n < i; n++) free( lines[n] );
 512        free( lines );
 513        png_destroy_read_struct( &png_ptr, &info_ptr, NULL );
 514        return FALSE;
 515      }
 516   }
 517
 518    png_read_image( png_ptr, lines );
 519    png_destroy_read_struct( &png_ptr, &info_ptr, NULL );
 520    ptr = image->GetData();
 521    if ((color_type == PNG_COLOR_TYPE_GRAY) ||
 522        (color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
 523      {
 524         for (unsigned int y = 0; y < height; y++)
 525           {
 526              ptr2 = lines[y];
 527              for (unsigned int x = 0; x < width; x++)
 528                {
 529                   unsigned char r = *ptr2++;
 530                   unsigned char a = *ptr2++;
 531                   if (a < 128)
 532                     {
 533                        *ptr++ = 255;
 534                        *ptr++ = 0;
 535                        *ptr++ = 255;
 536                        transp = 1;
 537                     }
 538                   else
 539                     {
 540                        *ptr++ = r;
 541                        *ptr++ = r;
 542                        *ptr++ = r;
 543                     }
 544                }
 545           }
 546      }
 547    else
 548      {
 549         for (unsigned int y = 0; y < height; y++)
 550           {
 551              ptr2 = lines[y];
 552              for (unsigned int x = 0; x < width; x++)
 553                {
 554                   unsigned char r = *ptr2++;
 555                   unsigned char g = *ptr2++;
 556                   unsigned char b = *ptr2++;
 557                   unsigned char a = *ptr2++;
 558                   if (a < 128)
 559                     {
 560                        *ptr++ = 255;
 561                        *ptr++ = 0;
 562                        *ptr++ = 255;
 563                        transp = 1;
 564                     }
 565                   else
 566                     {
 567                        if ((r == 255) && (g == 0) && (b == 255)) r = 254;
 568                        *ptr++ = r;
 569                        *ptr++ = g;
 570                        *ptr++ = b;
 571                     }
 572                }
 573           }
 574      }
 575    for (i = 0; i < height; i++) free( lines[i] );
 576    free( lines );
 577    if (transp)
 578      image->SetMaskColour( 255, 0, 255 );
 579    else
 580      image->SetMask( FALSE );
 581
 582    return TRUE;
 583 }
 584
 585
 586 bool wxPNGHandler::SaveFile( wxImage *image, const wxString& name )
 587 {
 588   FILE *f = fopen( name, "wb" );
 589   if (f)
 590   {
 591     png_structp png_ptr = png_create_write_struct( PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
 592     if (!png_ptr)
 593     {
 594       fclose( f );
 595       return FALSE;
 596     }
 597
 598     png_infop info_ptr = png_create_info_struct(png_ptr);
 599     if (info_ptr == NULL)
 600     {
 601       fclose(f);
 602       png_destroy_write_struct( &png_ptr, (png_infopp)NULL );
 603       return FALSE;
 604     }
 605
 606     if (setjmp(png_ptr->jmpbuf))
 607     {
 608       fclose( f );
 609       png_destroy_write_struct( &png_ptr, (png_infopp)NULL );
 610       return FALSE;
 611     }
 612
 613     png_init_io( png_ptr, f );
 614     png_set_IHDR( png_ptr, info_ptr, image->GetWidth(), image->GetHeight(), 8,
 615                   PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
 616                   PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
 617
 618     png_color_8 sig_bit;
 619     sig_bit.red = 8;
 620     sig_bit.green = 8;
 621     sig_bit.blue = 8;
 622     sig_bit.alpha = 8;
 623     png_set_sBIT( png_ptr, info_ptr, &sig_bit );
 624     png_write_info( png_ptr, info_ptr );
 625     png_set_shift( png_ptr, &sig_bit );
 626     png_set_packing( png_ptr );
 627
 628     unsigned char *data = (unsigned char *)malloc( image->GetWidth()*4 );
 629     if (!data)
 630     {
 631       fclose( f );
 632       png_destroy_write_struct( &png_ptr, (png_infopp)NULL );
 633       return FALSE;
 634     }
 635
 636     for (int y = 0; y < image->GetHeight(); y++)
 637     {
 638       unsigned char *ptr = image->GetData() + (y * image->GetWidth() * 3);
 639       for (int x = 0; x < image->GetWidth(); x++)
 640       {
 641         data[(x << 2) + 0] = *ptr++;
 642         data[(x << 2) + 1] = *ptr++;
 643         data[(x << 2) + 2] = *ptr++;
 644         if ((data[(x << 2) + 0] == image->GetMaskRed()) &&
 645             (data[(x << 2) + 1] == image->GetMaskGreen()) &&
 646             (data[(x << 2) + 2] == image->GetMaskBlue()))
 647           data[(x << 2) + 3] = 0;
 648         else
 649           data[(x << 2) + 3] = 255;
 650       }
 651       png_bytep row_ptr = data;
 652       png_write_rows( png_ptr, &row_ptr, 1 );
 653     }
 654     free(data);
 655     png_write_end( png_ptr, info_ptr );
 656     png_destroy_write_struct( &png_ptr, (png_infopp)NULL );
 657
 658     fclose(f);
 659   }
 660   return TRUE;
 661 }
 662
 663 //-----------------------------------------------------------------------------
 664 // wxBMPHandler
 665 //-----------------------------------------------------------------------------
 666
 667 #if !USE_SHARED_LIBRARIES
 668 IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler)
 669 #endif
 670
 671 bool wxBMPHandler::LoadFile( wxImage *image, const wxString& name )
 672 {
 673    FILE               *file;
 674    unsigned char      *data, *ptr;
 675    int                 done, i, bpp, planes, comp, ncolors, line, column,
 676                        linesize, linepos, rshift = 0, gshift = 0, bshift = 0;
 677    unsigned char       aByte;
 678    short int           word;
 679    long int            dbuf[4], dword, rmask = 0, gmask = 0, bmask = 0, offset,
 680                        size;
 681    signed char         bbuf[4];
 682    struct _cmap
 683      {
 684         unsigned char       r, g, b;
 685      }
 686                       *cmap = NULL;
 687 #ifndef BI_RGB
 688 #define BI_RGB       0
 689 #define BI_RLE8      1
 690 #define BI_RLE4      2
 691 #define BI_BITFIELDS 3
 692 #endif
 693
 694   image->Destroy();
 695
 696    file = fopen(name, "r");
 697    if (!file)
 698       return NULL;
 699
 700    done = 0;
 701    /*
 702     * Reading the bmp header
 703     */
 704
 705    fread(&bbuf, 1, 2, file);
 706
 707    fread(dbuf, 4, 4, file);
 708
 709    size = dbuf[0];
 710    offset = dbuf[2];
 711
 712    fread(dbuf, 4, 2, file);
 713    int width = (int)dbuf[0];
 714    int height = (int)dbuf[1];
 715    if (width > 32767)
 716      {
 717         fprintf(stderr, "IMLIB ERROR: Image width > 32767 pixels for file\n");
 718         fclose(file);
 719         return FALSE;
 720      }
 721    if (height > 32767)
 722      {
 723         fprintf(stderr, "IMLIB ERROR: Image height > 32767 pixels for file\n");
 724         fclose(file);
 725         return FALSE;
 726      }
 727    fread(&word, 2, 1, file);
 728    planes = (int)word;
 729    fread(&word, 2, 1, file);
 730    bpp = (int)word;
 731    if (bpp != 1 && bpp != 4 && bpp != 8 && bpp && 16 && bpp != 24 && bpp != 32)
 732      {
 733         fprintf(stderr, "IMLIB ERROR: unknown bitdepth in file\n");
 734         fclose(file);
 735         return FALSE;
 736      }
 737    fread(dbuf, 4, 4, file);
 738    comp = (int)dbuf[0];
 739    if (comp != BI_RGB && comp != BI_RLE4 && comp != BI_RLE8 && comp != BI_BITFIELDS)
 740      {
 741         fprintf(stderr, "IMLIB ERROR: unknown encoding in Windows BMP file\n");
 742         fclose(file);
 743         return FALSE;
 744      }
 745    fread(dbuf, 4, 2, file);
 746    ncolors = (int)dbuf[0];
 747    if (ncolors == 0)
 748       ncolors = 1 << bpp;
 749    /* some more sanity checks */
 750    if (((comp == BI_RLE4) && (bpp != 4)) || ((comp == BI_RLE8) && (bpp != 8)) || ((comp == BI_BITFIELDS) && (bpp != 16 && bpp != 32)))
 751      {
 752         fprintf(stderr, "IMLIB ERROR: encoding of BMP doesn't match bitdepth\n");
 753         fclose(file);
 754         return FALSE;
 755      }
 756    if (bpp < 16)
 757      {
 758         cmap = (struct _cmap *)malloc(sizeof(struct _cmap) * ncolors);
 759
 760         if (!cmap)
 761           {
 762              fprintf(stderr, "IMLIB ERROR: Cannot allocate RAM for color map in BMP file\n");
 763              fclose(file);
 764              return FALSE;
 765           }
 766      }
 767    else
 768       cmap = NULL;
 769
 770    image->Create( width, height );
 771    ptr = image->GetData();
 772    if (!ptr)
 773      {
 774         fprintf(stderr, "IMLIB ERROR: Cannot allocate RAM for RGB data in file\n");
 775         fclose(file);
 776         if (cmap)
 777            free(cmap);
 778         return FALSE;
 779      }
 780
 781    /*
 782     * Reading the palette, if it exists.
 783     */
 784    if (bpp < 16 && ncolors != 0)
 785      {
 786         for (i = 0; i < ncolors; i++)
 787           {
 788              fread(bbuf, 1, 4, file);
 789              cmap[i].b = bbuf[0];
 790              cmap[i].g = bbuf[1];
 791              cmap[i].r = bbuf[2];
 792           }
 793      }
 794    else if (bpp == 16 || bpp == 32)
 795      {
 796         if (comp == BI_BITFIELDS)
 797           {
 798              int                 bit = 0;
 799
 800              fread(dbuf, 4, 3, file);
 801              bmask = dbuf[0];
 802              gmask = dbuf[1];
 803              rmask = dbuf[2];
 804              /* find shift amount.. ugly, but i can't think of a better way */
 805              for (bit = 0; bit < bpp; bit++)
 806                {
 807                   if (bmask & (1 << bit))
 808                      bshift = bit;
 809                   if (gmask & (1 << bit))
 810                      gshift = bit;
 811                   if (rmask & (1 << bit))
 812                      rshift = bit;
 813                }
 814           }
 815         else if (bpp == 16)
 816           {
 817              rmask = 0x7C00;
 818              gmask = 0x03E0;
 819              bmask = 0x001F;
 820              rshift = 10;
 821              gshift = 5;
 822              bshift = 0;
 823           }
 824         else if (bpp == 32)
 825           {
 826              rmask = 0x00FF0000;
 827              gmask = 0x0000FF00;
 828              bmask = 0x000000FF;
 829              rshift = 16;
 830              gshift = 8;
 831              bshift = 0;
 832           }
 833      }
 834
 835    /*
 836     * REading the image data
 837     */
 838    fseek(file, offset, SEEK_SET);
 839    data = ptr;
 840
 841    /* set the whole image to the background color */
 842    if (bpp < 16 && (comp == BI_RLE4 || comp == BI_RLE8))
 843      {
 844         for (i = 0; i < width * height; i++)
 845           {
 846              *ptr++ = cmap[0].r;
 847              *ptr++ = cmap[0].g;
 848              *ptr++ = cmap[0].b;
 849           }
 850         ptr = data;
 851      }
 852    line = 0;
 853    column = 0;
 854 #define poffset (line * width * 3 + column * 3)
 855
 856    /*
 857     * BMPs are stored upside down... hmmmmmmmmmm....
 858     */
 859
 860    linesize = ((width * bpp + 31) / 32) * 4;
 861    for (line = (height - 1); line >= 0; line--)
 862      {
 863         linepos = 0;
 864         for (column = 0; column < width;)
 865           {
 866              if (bpp < 16)
 867                {
 868                   int                 index;
 869
 870                   linepos++;
 871                   aByte = getc(file);
 872                   if (bpp == 1)
 873                     {
 874                        int                 bit = 0;
 875
 876                        for (bit = 0; bit < 8; bit++)
 877                          {
 878                             index = ((aByte & (0x80 >> bit)) ? 1 : 0);
 879                             ptr[poffset] = cmap[index].r;
 880                             ptr[poffset + 1] = cmap[index].g;
 881                             ptr[poffset + 2] = cmap[index].b;
 882                             column++;
 883                          }
 884                     }
 885                   else if (bpp == 4)
 886                     {
 887                        if (comp == BI_RLE4)
 888                          {
 889                             fprintf(stderr, "can't deal with 4bit encoded yet.\n");
 890                             image->Destroy();
 891                             free(cmap);
 892                             return FALSE;
 893                          }
 894                        else
 895                          {
 896                             int                 nibble = 0;
 897
 898                             for (nibble = 0; nibble < 2; nibble++)
 899                               {
 900                                  index = ((aByte & (0xF0 >> nibble * 4)) >> (!nibble * 4));
 901                                  if (index >= 16)
 902                                     index = 15;
 903                                  ptr[poffset] = cmap[index].r;
 904                                  ptr[poffset + 1] = cmap[index].g;
 905                                  ptr[poffset + 2] = cmap[index].b;
 906                                  column++;
 907                               }
 908                          }
 909                     }
 910                   else if (bpp == 8)
 911                     {
 912                        if (comp == BI_RLE8)
 913                          {
 914                             unsigned char       first;
 915
 916                             first = aByte;
 917                             aByte = getc(file);
 918                             if (first == 0)
 919                               {
 920                                  if (aByte == 0)
 921                                    {
 922 /*                                    column = width; */
 923                                    }
 924                                  else if (aByte == 1)
 925                                    {
 926                                       column = width;
 927                                       line = -1;
 928                                    }
 929                                  else if (aByte == 2)
 930                                    {
 931                                       aByte = getc(file);
 932                                       column += aByte;
 933                                       linepos = column * bpp / 8;
 934                                       aByte = getc(file);
 935                                       line += aByte;
 936                                    }
 937                                  else
 938                                    {
 939                                       int                 absolute = aByte;
 940
 941                                       for (i = 0; i < absolute; i++)
 942                                         {
 943                                            linepos++;
 944                                            aByte = getc(file);
 945                                            ptr[poffset] = cmap[aByte].r;
 946                                            ptr[poffset + 1] = cmap[aByte].g;
 947                                            ptr[poffset + 2] = cmap[aByte].b;
 948                                            column++;
 949                                         }
 950                                       if (absolute & 0x01)
 951                                          aByte = getc(file);
 952                                    }
 953                               }
 954                             else
 955                               {
 956                                  for (i = 0; i < first; i++)
 957                                    {
 958                                       ptr[poffset] = cmap[aByte].r;
 959                                       ptr[poffset + 1] = cmap[aByte].g;
 960                                       ptr[poffset + 2] = cmap[aByte].b;
 961                                       column++;
 962                                       linepos++;
 963                                    }
 964                               }
 965                          }
 966                        else
 967                          {
 968                             ptr[poffset] = cmap[aByte].r;
 969                             ptr[poffset + 1] = cmap[aByte].g;
 970                             ptr[poffset + 2] = cmap[aByte].b;
 971                             column++;
 972                             linepos += size;
 973                          }
 974                     }
 975                }
 976              else if (bpp == 24)
 977                {
 978                   linepos += fread(&bbuf, 1, 3, file);
 979                   ptr[poffset] = (unsigned char)bbuf[2];
 980                   ptr[poffset + 1] = (unsigned char)bbuf[1];
 981                   ptr[poffset + 2] = (unsigned char)bbuf[0];
 982                   column++;
 983                }
 984              else if (bpp == 16)
 985                {
 986                   unsigned char       temp;
 987
 988                   linepos += fread(&word, 2, 1, file);
 989                   temp = (word & rmask) >> rshift;
 990                   ptr[poffset] = temp;
 991                   temp = (word & gmask) >> gshift;
 992                   ptr[poffset + 1] = temp;
 993                   temp = (word & bmask) >> gshift;
 994                   ptr[poffset + 2] = temp;
 995                   column++;
 996                }
 997              else
 998                {
 999                   unsigned char       temp;
1000
1001                   linepos += fread(&dword, 4, 1, file);
1002                   temp = (dword & rmask) >> rshift;
1003                   ptr[poffset] = temp;
1004                   temp = (dword & gmask) >> gshift;
1005                   ptr[poffset + 1] = temp;
1006                   temp = (dword & bmask) >> bshift;
1007                   ptr[poffset + 2] = temp;
1008                   column++;
1009                }
1010           }
1011         while ((linepos < linesize) && (comp != 1) && (comp != 2))
1012           {
1013              int                 temp = fread(&aByte, 1, 1, file);
1014
1015              linepos += temp;
1016              if (!temp)
1017                 break;
1018           }
1019      }
1020    if (cmap) free(cmap);
1021
1022    image->SetMask( FALSE );
1023
1024    fclose(file);
1025    return TRUE;
1026 }
1027
1028 #ifdef __WXMSW__
1029
1030 wxBitmap wxImage::ConvertToBitmap() const
1031 {
1032
1033   wxBitmap bitmap;
1034   wxCHECK_MSG( Ok(), bitmap, "invalid image" );
1035   int width = GetWidth();
1036   int height = GetHeight();
1037   bitmap.SetWidth( width );
1038   bitmap.SetHeight( height );
1039   bitmap.SetDepth( wxDisplayDepth() );
1040
1041   int headersize = sizeof(BITMAPINFOHEADER);
1042   LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize );
1043   wxCHECK_MSG( lpDIBh, bitmap, "could not allocate memory for DIB header" );
1044
1045 // Fill in the DIB header
1046   lpDIBh->bmiHeader.biSize = headersize;
1047   lpDIBh->bmiHeader.biWidth = width;
1048   lpDIBh->bmiHeader.biHeight = -height;
1049   lpDIBh->bmiHeader.biSizeImage = width * height * 3;
1050
1051   lpDIBh->bmiHeader.biPlanes = 1;
1052   lpDIBh->bmiHeader.biBitCount = 24;
1053   lpDIBh->bmiHeader.biCompression = BI_RGB;
1054   lpDIBh->bmiHeader.biClrUsed = 0;
1055
1056 // These seem not needed for our purpose here.
1057 //  lpDIBh->bmiHeader.biClrImportant = 0;
1058 //  lpDIBh->bmiHeader.biXPelsPerMeter = 0;
1059 //  lpDIBh->bmiHeader.biYPelsPerMeter = 0;
1060
1061   unsigned char *lpBits = (unsigned char *) malloc( width*height*3 );
1062   if( !lpBits )
1063   {
1064       wxFAIL_MSG( "could not allocate memory for DIB" );
1065       free( lpDIBh );
1066       return bitmap;
1067   }
1068
1069   unsigned char *data = GetData();
1070
1071   unsigned char *ptdata = data, *ptbits = lpBits;
1072   for( int i=0; i<width*height; i++ )
1073   {
1074     *(ptbits++) = *(ptdata+2);
1075     *(ptbits++) = *(ptdata+1);
1076     *(ptbits++) = *(ptdata  );
1077     ptdata += 3;
1078   }
1079
1080   HDC hdc = ::GetDC(NULL);
1081
1082   HBITMAP hbitmap;
1083   hbitmap = CreateDIBitmap( hdc, &(lpDIBh->bmiHeader), CBM_INIT, lpBits, lpDIBh, DIB_RGB_COLORS );
1084
1085 // The above line is equivalent to the following two lines.
1086 //    hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
1087 //    ::SetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS);
1088 // or the following lines
1089 //    hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
1090 //    HDC memdc = ::CreateCompatibleDC( hdc );
1091 //    ::SelectObject( memdc, hbitmap);
1092 //    ::SetDIBitsToDevice( memdc, 0, 0, width, height,
1093 //          0, 0, 0, height, (void *)lpBits, lpDIBh, DIB_RGB_COLORS);
1094 //    ::SelectObject( memdc, 0 );
1095 //    ::DeleteDC( memdc );
1096
1097   bitmap.SetHBITMAP( (WXHBITMAP) hbitmap );
1098
1099   if( HasMask() )
1100   {
1101     unsigned char r = GetMaskRed();
1102     unsigned char g = GetMaskGreen();
1103     unsigned char b = GetMaskBlue();
1104     unsigned char zero = 0, one = 255;
1105     ptdata = data;
1106     ptbits = lpBits;
1107     for( int i=0; i<width*height; i++ )
1108     {
1109       if( (*(ptdata++)!=r) | (*(ptdata++)!=g) | (*(ptdata++)!=b) )
1110       {
1111         *(ptbits++) = one;
1112         *(ptbits++) = one;
1113         *(ptbits++) = one;
1114       }
1115       else
1116       {
1117         *(ptbits++) = zero;
1118         *(ptbits++) = zero;
1119         *(ptbits++) = zero;
1120       }
1121     }
1122     hbitmap = ::CreateBitmap( (WORD)width, (WORD)height, 1, 1, NULL );
1123     ::SetDIBits( hdc, hbitmap, 0, (WORD)height, lpBits, lpDIBh, DIB_RGB_COLORS);
1124     wxMask *mask = new wxMask();
1125     mask->SetMaskBitmap( (WXHBITMAP) hbitmap );
1126     bitmap.SetMask( mask );
1127
1128 /* The following can also be used but is slow to run
1129     wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue());
1130     wxMask *mask = new wxMask( bitmap, colour );
1131     bitmap.SetMask( mask );
1132 */
1133   }
1134
1135   ::ReleaseDC(NULL, hdc);
1136   free(lpDIBh);
1137   free(lpBits);
1138
1139   if( bitmap.GetHBITMAP() )
1140     bitmap.SetOk( TRUE );
1141   else
1142     bitmap.SetOk( FALSE );
1143
1144   return bitmap;
1145 }
1146
1147
1148 wxImage::wxImage( const wxBitmap &bitmap )
1149 {
1150   if( !bitmap.Ok() )
1151   {
1152       wxFAIL_MSG( "invalid bitmap" );
1153       return;
1154   }
1155
1156   int width = bitmap.GetWidth();
1157   int height = bitmap.GetHeight();
1158   Create( width, height );
1159   unsigned char *data = GetData();
1160   if( !data )
1161   {
1162       wxFAIL_MSG( "could not allocate data for image" );
1163       return;
1164   }
1165
1166   int headersize = sizeof(BITMAPINFOHEADER);
1167   LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize );
1168   if( !lpDIBh )
1169   {
1170       wxFAIL_MSG( "could not allocate data for DIB header" );
1171       free( data );
1172       return;
1173   }
1174
1175 // Fill in the DIB header
1176   lpDIBh->bmiHeader.biSize = headersize;
1177   lpDIBh->bmiHeader.biWidth = width;
1178   lpDIBh->bmiHeader.biHeight = -height;
1179   lpDIBh->bmiHeader.biSizeImage = width * height * 3;
1180
1181   lpDIBh->bmiHeader.biPlanes = 1;
1182   lpDIBh->bmiHeader.biBitCount = 24;
1183   lpDIBh->bmiHeader.biCompression = BI_RGB;
1184   lpDIBh->bmiHeader.biClrUsed = 0;
1185
1186 // These seem not needed for our purpose here.
1187 //    lpDIBh->bmiHeader.biClrImportant = 0;
1188 //    lpDIBh->bmiHeader.biXPelsPerMeter = 0;
1189 //    lpDIBh->bmiHeader.biYPelsPerMeter = 0;
1190
1191   unsigned char *lpBits = (unsigned char *) malloc( width*height*3 );
1192   if( !lpBits )
1193   {
1194       wxFAIL_MSG( "could not allocate data for DIB" );
1195       free( data );
1196       free( lpDIBh );
1197       return;
1198   }
1199
1200   HBITMAP hbitmap;
1201   hbitmap = (HBITMAP) bitmap.GetHBITMAP();
1202   HDC hdc = ::GetDC(NULL);
1203   ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
1204
1205   unsigned char *ptdata = data, *ptbits = lpBits;
1206   for( int i=0; i<width*height; i++ )
1207   {
1208     *(ptdata++) = *(ptbits+2);
1209     *(ptdata++) = *(ptbits+1);
1210     *(ptdata++) = *(ptbits  );
1211     ptbits += 3;
1212   }
1213
1214   if( bitmap.GetMask() && bitmap.GetMask()->GetMaskBitmap() )
1215   {
1216     hbitmap = (HBITMAP) bitmap.GetMask()->GetMaskBitmap();
1217     HDC memdc = ::CreateCompatibleDC( hdc );
1218     ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
1219     ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
1220     ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
1221     ::DeleteDC( memdc );
1222     unsigned char r=16, g=16, b=16;  // background set to RGB(16,16,16)
1223     ptdata = data;
1224     ptbits = lpBits;
1225     for( int i=0; i<width*height; i++ )
1226     {
1227       if( *ptbits != 0 )
1228       {
1229         *(ptdata++)  = r;
1230         *(ptdata++)  = g;
1231         *(ptdata++)  = b;
1232       }
1233       ptbits += 3;
1234     }
1235     SetMaskColour( r, g, b );
1236   }
1237
1238   ::ReleaseDC(NULL, hdc);
1239   free(lpDIBh);
1240   free(lpBits);
1241 }
1242
1243 #endif
1244
1245 #ifdef __WXGTK__
1246
1247 wxBitmap wxImage::ConvertToBitmap() const
1248 {
1249     wxBitmap bitmap;
1250
1251     wxCHECK_MSG( Ok(), bitmap, "invalid image" );
1252
1253     int width = GetWidth();
1254     int height = GetHeight();
1255
1256     bitmap.SetHeight( height );
1257     bitmap.SetWidth( width );
1258
1259     // Create picture
1260
1261     GdkImage *data_image =
1262       gdk_image_new( GDK_IMAGE_FASTEST, gdk_visual_get_system(), width, height );
1263
1264     bitmap.SetPixmap( gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, -1 ) );
1265
1266     // Create mask
1267
1268     GdkImage *mask_image = (GdkImage*) NULL;
1269
1270     if (HasMask())
1271     {
1272         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
1273
1274         mask_image =  gdk_image_new_bitmap( gdk_visual_get_system(), mask_data, width, height );
1275
1276         wxMask *mask = new wxMask();
1277         mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 );
1278
1279         bitmap.SetMask( mask );
1280     }
1281
1282     // Retrieve depth
1283
1284     GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() );
1285     if (visual == NULL) visual = gdk_window_get_visual( (GdkWindow*) &gdk_root_parent );
1286     int bpp = visual->depth;
1287     if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15;
1288     if (bpp < 8) bpp = 8;
1289
1290     // Render
1291
1292     enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
1293     byte_order b_o = RGB;
1294
1295     if (bpp >= 24)
1296     {
1297         GdkVisual *visual = gdk_visual_get_system();
1298         if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
1299         else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RGB;
1300         else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
1301         else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
1302         else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
1303         else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
1304     }
1305
1306     int r_mask = GetMaskRed();
1307     int g_mask = GetMaskGreen();
1308     int b_mask = GetMaskBlue();
1309
1310     unsigned char* data = GetData();
1311
1312     int index = 0;
1313     for (int y = 0; y < height; y++)
1314     {
1315         for (int x = 0; x < width; x++)
1316         {
1317             int r = data[index];
1318             index++;
1319             int g = data[index];
1320             index++;
1321             int b = data[index];
1322             index++;
1323
1324             if (HasMask())
1325             {
1326                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
1327                     gdk_image_put_pixel( mask_image, x, y, 1 );
1328                 else
1329                     gdk_image_put_pixel( mask_image, x, y, 0 );
1330             }
1331
1332             switch (bpp)
1333             {
1334                 case 8:
1335                 {
1336                     GdkColormap *cmap = gtk_widget_get_default_colormap();
1337                     GdkColor *colors = cmap->colors;
1338                     int max = 3 * (65536);
1339                     int index = -1;
1340
1341                     for (int i = 0; i < cmap->size; i++)
1342                     {
1343                         int rdiff = (r << 8) - colors[i].red;
1344                         int gdiff = (g << 8) - colors[i].green;
1345                         int bdiff = (b << 8) - colors[i].blue;
1346                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
1347                         if (sum < max) { index = i; max = sum; }
1348                     }
1349
1350                     gdk_image_put_pixel( data_image, x, y, index );
1351
1352                     break;
1353                 }
1354                 case 15:
1355                 {
1356                     guint32 pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3);
1357                     gdk_image_put_pixel( data_image, x, y, pixel );
1358                     break;
1359                 }
1360                 case 16:
1361                 {
1362                     guint32 pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3);
1363                     gdk_image_put_pixel( data_image, x, y, pixel );
1364                     break;
1365                 }
1366                 case 32:
1367                 case 24:
1368                 {
1369                     guint32 pixel = 0;
1370                     switch (b_o)
1371                     {
1372                         case RGB: pixel = (r << 16) | (g << 8) | b; break;
1373                         case RBG: pixel = (r << 16) | (b << 8) | g; break;
1374                         case BRG: pixel = (b << 16) | (r << 8) | g; break;
1375                         case BGR: pixel = (b << 16) | (g << 8) | r; break;
1376                         case GRB: pixel = (g << 16) | (r << 8) | b; break;
1377                         case GBR: pixel = (g << 16) | (b << 8) | r; break;
1378                     }
1379                     gdk_image_put_pixel( data_image, x, y, pixel );
1380                 }
1381                 default: break;
1382             }
1383         } // for
1384     }  // for
1385
1386     // Blit picture
1387
1388     GdkGC *data_gc = gdk_gc_new( bitmap.GetPixmap() );
1389
1390     gdk_draw_image( bitmap.GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
1391
1392     gdk_image_destroy( data_image );
1393     gdk_gc_unref( data_gc );
1394
1395     // Blit mask
1396
1397     if (HasMask())
1398     {
1399         GdkGC *mask_gc = gdk_gc_new( bitmap.GetMask()->GetBitmap() );
1400
1401         gdk_draw_image( bitmap.GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
1402
1403         gdk_image_destroy( mask_image );
1404         gdk_gc_unref( mask_gc );
1405     }
1406
1407     return bitmap;
1408 }
1409
1410 wxImage::wxImage( const wxBitmap &bitmap )
1411 {
1412     wxCHECK_RET( bitmap.Ok(), "invalid bitmap" );
1413
1414     GdkImage *gdk_image = gdk_image_get( bitmap.GetPixmap(),
1415                                          0, 0,
1416                                          bitmap.GetWidth(), bitmap.GetHeight() );
1417
1418     wxCHECK_RET( gdk_image, "couldn't create image" );
1419
1420     Create( bitmap.GetWidth(), bitmap.GetHeight() );
1421     char unsigned *data = GetData();
1422
1423     if (!data)
1424     {
1425         gdk_image_destroy( gdk_image );
1426         wxFAIL_MSG( "couldn't create image" );
1427         return;
1428     }
1429
1430     GdkImage *gdk_image_mask = (GdkImage*) NULL;
1431     if (bitmap.GetMask())
1432     {
1433         gdk_image_mask = gdk_image_get( bitmap.GetMask()->GetBitmap(),
1434                                         0, 0,
1435                                         bitmap.GetWidth(), bitmap.GetHeight() );
1436
1437         SetMaskColour( 16, 16, 16 );  // anything unlikely and dividable
1438     }
1439
1440     GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() );
1441     if (visual == NULL) visual = gdk_window_get_visual( (GdkWindow*) &gdk_root_parent );
1442     int bpp = visual->depth;
1443     if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15;
1444
1445     GdkColormap *cmap = gtk_widget_get_default_colormap();
1446
1447     long pos = 0;
1448     for (int j = 0; j < bitmap.GetHeight(); j++)
1449     {
1450         for (int i = 0; i < bitmap.GetWidth(); i++)
1451         {
1452             int pixel = gdk_image_get_pixel( gdk_image, i, j );
1453             if (bpp <= 8)
1454             {
1455                 data[pos] = cmap->colors[pixel].red >> 8;
1456                 data[pos+1] = cmap->colors[pixel].green >> 8;
1457                 data[pos+2] = cmap->colors[pixel].blue >> 8;
1458             } else if (bpp == 15)
1459             {
1460                 data[pos] = (pixel >> 7) & 0xf8;
1461                 data[pos+1] = (pixel >> 2) & 0xf8;
1462                 data[pos+2] = (pixel << 3) & 0xf8;
1463             } else if (bpp == 16)
1464             {
1465                 data[pos] = (pixel >> 8) & 0xf8;
1466                 data[pos+1] = (pixel >> 3) & 0xfc;
1467                 data[pos+2] = (pixel << 3) & 0xf8;
1468             } else
1469             {
1470                 data[pos] = (pixel >> 16) & 0xff;
1471                 data[pos+1] = (pixel >> 8) & 0xff;
1472                 data[pos+2] = pixel & 0xff;
1473             }
1474
1475             if (gdk_image_mask)
1476             {
1477                 int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
1478                 if (mask_pixel == 0)
1479                 {
1480                     data[pos] = 16;
1481                     data[pos+1] = 16;
1482                     data[pos+2] = 16;
1483                }
1484             }
1485
1486             pos += 3;
1487         }
1488     }
1489
1490     gdk_image_destroy( gdk_image );
1491     if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
1492 }
1493
1494 #endif