src/gtk1/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/bitmap.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/bitmap.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/app.h"
  17     #include "wx/dcmemory.h"
  18     #include "wx/palette.h"
  19     #include "wx/icon.h"
  20     #include "wx/math.h"
  21     #include "wx/image.h"
  22 #endif // WX_PRECOMP
  23
  24 #include "wx/filefn.h"
  25
  26 #include <gdk/gdk.h>
  27 #include <gtk/gtk.h>
  28 #include <gdk/gdkx.h>
  29
  30 #include <gdk/gdkrgb.h>
  31
  32 extern
  33 void gdk_wx_draw_bitmap (GdkDrawable  *drawable,
  34                          GdkGC        *gc,
  35                          GdkDrawable  *src,
  36                          gint          xsrc,
  37                          gint          ysrc,
  38                          gint          xdest,
  39                          gint          ydest,
  40                          gint          width,
  41                          gint          height);
  42
  43 //-----------------------------------------------------------------------------
  44 // data
  45 //-----------------------------------------------------------------------------
  46
  47 extern GtkWidget *wxGetRootWindow();
  48
  49 //-----------------------------------------------------------------------------
  50 // wxMask
  51 //-----------------------------------------------------------------------------
  52
  53 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  54
  55 wxMask::wxMask()
  56 {
  57     m_bitmap = (GdkBitmap *) NULL;
  58 }
  59
  60 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  61 {
  62     m_bitmap = (GdkBitmap *) NULL;
  63     Create( bitmap, colour );
  64 }
  65
  66 #if wxUSE_PALETTE
  67 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  68 {
  69     m_bitmap = (GdkBitmap *) NULL;
  70     Create( bitmap, paletteIndex );
  71 }
  72 #endif // wxUSE_PALETTE
  73
  74 wxMask::wxMask( const wxBitmap& bitmap )
  75 {
  76     m_bitmap = (GdkBitmap *) NULL;
  77     Create( bitmap );
  78 }
  79
  80 wxMask::~wxMask()
  81 {
  82     if (m_bitmap)
  83         gdk_bitmap_unref( m_bitmap );
  84 }
  85
  86 bool wxMask::Create( const wxBitmap& bitmap,
  87                      const wxColour& colour )
  88 {
  89     if (m_bitmap)
  90     {
  91         gdk_bitmap_unref( m_bitmap );
  92         m_bitmap = (GdkBitmap*) NULL;
  93     }
  94
  95     wxImage image = bitmap.ConvertToImage();
  96     if (!image.Ok()) return false;
  97
  98     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, image.GetWidth(), image.GetHeight(), 1 );
  99     GdkGC *gc = gdk_gc_new( m_bitmap );
 100
 101     GdkColor color;
 102     color.red = 65000;
 103     color.green = 65000;
 104     color.blue = 65000;
 105     color.pixel = 1;
 106     gdk_gc_set_foreground( gc, &color );
 107     gdk_gc_set_fill( gc, GDK_SOLID );
 108     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
 109
 110     unsigned char *data = image.GetData();
 111     int index = 0;
 112
 113     unsigned char red = colour.Red();
 114     unsigned char green = colour.Green();
 115     unsigned char blue = colour.Blue();
 116
 117     GdkVisual *visual = wxTheApp->GetGdkVisual();
 118
 119     int bpp = visual->depth;
 120     if ((bpp == 16) && (visual->red_mask != 0xf800))
 121         bpp = 15;
 122     if (bpp == 15)
 123     {
 124         red = red & 0xf8;
 125         green = green & 0xf8;
 126         blue = blue & 0xf8;
 127     }
 128     else if (bpp == 16)
 129     {
 130         red = red & 0xf8;
 131         green = green & 0xfc;
 132         blue = blue & 0xf8;
 133     }
 134     else if (bpp == 12)
 135     {
 136         red = red & 0xf0;
 137         green = green & 0xf0;
 138         blue = blue & 0xf0;
 139     }
 140
 141     color.red = 0;
 142     color.green = 0;
 143     color.blue = 0;
 144     color.pixel = 0;
 145     gdk_gc_set_foreground( gc, &color );
 146
 147     for (int j = 0; j < image.GetHeight(); j++)
 148     {
 149         int start_x = -1;
 150         int i;
 151         for (i = 0; i < image.GetWidth(); i++)
 152         {
 153             if ((data[index] == red) &&
 154                 (data[index+1] == green) &&
 155                 (data[index+2] == blue))
 156             {
 157                 if (start_x == -1)
 158                 start_x = i;
 159             }
 160             else
 161             {
 162                 if (start_x != -1)
 163                 {
 164                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 165                     start_x = -1;
 166                 }
 167             }
 168             index += 3;
 169         }
 170         if (start_x != -1)
 171             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 172     }
 173
 174     gdk_gc_unref( gc );
 175
 176     return true;
 177 }
 178
 179 #if wxUSE_PALETTE
 180 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 181 {
 182     unsigned char r,g,b;
 183     wxPalette *pal = bitmap.GetPalette();
 184
 185     wxCHECK_MSG( pal, false, wxT("Cannot create mask from bitmap without palette") );
 186
 187     pal->GetRGB(paletteIndex, &r, &g, &b);
 188
 189     return Create(bitmap, wxColour(r, g, b));
 190 }
 191 #endif // wxUSE_PALETTE
 192
 193 bool wxMask::Create( const wxBitmap& bitmap )
 194 {
 195     if (m_bitmap)
 196     {
 197         gdk_bitmap_unref( m_bitmap );
 198         m_bitmap = (GdkBitmap*) NULL;
 199     }
 200
 201     if (!bitmap.Ok()) return false;
 202
 203     wxCHECK_MSG( bitmap.GetBitmap(), false, wxT("Cannot create mask from colour bitmap") );
 204
 205     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 206
 207     if (!m_bitmap) return false;
 208
 209     GdkGC *gc = gdk_gc_new( m_bitmap );
 210
 211     gdk_wx_draw_bitmap( m_bitmap, gc, bitmap.GetBitmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
 212
 213     gdk_gc_unref( gc );
 214
 215     return true;
 216 }
 217
 218 GdkBitmap *wxMask::GetBitmap() const
 219 {
 220     return m_bitmap;
 221 }
 222
 223 //-----------------------------------------------------------------------------
 224 // wxBitmap
 225 //-----------------------------------------------------------------------------
 226
 227 class wxBitmapRefData: public wxObjectRefData
 228 {
 229 public:
 230     wxBitmapRefData();
 231     virtual ~wxBitmapRefData();
 232
 233     GdkPixmap      *m_pixmap;
 234     GdkBitmap      *m_bitmap;
 235     wxMask         *m_mask;
 236     int             m_width;
 237     int             m_height;
 238     int             m_bpp;
 239     wxPalette      *m_palette;
 240 };
 241
 242 wxBitmapRefData::wxBitmapRefData()
 243 {
 244     m_pixmap = (GdkPixmap *) NULL;
 245     m_bitmap = (GdkBitmap *) NULL;
 246     m_mask = (wxMask *) NULL;
 247     m_width = 0;
 248     m_height = 0;
 249     m_bpp = 0;
 250     m_palette = (wxPalette *) NULL;
 251 }
 252
 253 wxBitmapRefData::~wxBitmapRefData()
 254 {
 255     if (m_pixmap)
 256         gdk_pixmap_unref( m_pixmap );
 257     if (m_bitmap)
 258         gdk_bitmap_unref( m_bitmap );
 259     delete m_mask;
 260 #if wxUSE_PALETTE
 261     delete m_palette;
 262 #endif // wxUSE_PALETTE
 263 }
 264
 265 //-----------------------------------------------------------------------------
 266
 267 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 268
 269 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 270
 271 wxBitmap::wxBitmap()
 272 {
 273 }
 274
 275 wxBitmap::wxBitmap( int width, int height, int depth )
 276 {
 277     Create( width, height, depth );
 278 }
 279
 280 bool wxBitmap::Create( int width, int height, int depth )
 281 {
 282     UnRef();
 283
 284     if ( width <= 0 || height <= 0 )
 285     {
 286         return false;
 287     }
 288
 289     GdkVisual *visual = wxTheApp->GetGdkVisual();
 290
 291     if (depth == -1)
 292         depth = visual->depth;
 293
 294     wxCHECK_MSG( (depth == visual->depth) || (depth == 1) || (depth == 32), false,
 295                     wxT("invalid bitmap depth") );
 296
 297     m_refData = new wxBitmapRefData();
 298     M_BMPDATA->m_mask = (wxMask *) NULL;
 299     M_BMPDATA->m_width = width;
 300     M_BMPDATA->m_height = height;
 301     if (depth == 1)
 302     {
 303         M_BMPDATA->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 304         M_BMPDATA->m_bpp = 1;
 305     }
 306     else
 307     {
 308         M_BMPDATA->m_pixmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, depth );
 309         M_BMPDATA->m_bpp = visual->depth;
 310     }
 311
 312     return Ok();
 313 }
 314
 315 wxBitmap::wxBitmap(const char* const* bits)
 316 {
 317     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 318
 319     GdkVisual *visual = wxTheApp->GetGdkVisual();
 320
 321     m_refData = new wxBitmapRefData();
 322
 323     GdkBitmap *mask = (GdkBitmap*) NULL;
 324
 325     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxGetRootWindow()->window, &mask, NULL, (gchar **) bits );
 326
 327     wxCHECK2_MSG(M_BMPDATA->m_pixmap, return, wxT("couldn't create pixmap"));
 328
 329     if (mask)
 330     {
 331         M_BMPDATA->m_mask = new wxMask();
 332         M_BMPDATA->m_mask->m_bitmap = mask;
 333     }
 334
 335     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 336
 337     M_BMPDATA->m_bpp = visual->depth;  // Can we get a different depth from create_from_xpm_d() ?
 338 }
 339
 340 wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
 341 {
 342     wxCHECK_MSG( Ok(), wxNullBitmap, wxT("invalid bitmap") );
 343
 344     if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 345         return *this;
 346
 347     int width = wxMax(newx, 1);
 348     int height = wxMax(newy, 1);
 349     width = wxMin(width, clipwidth);
 350     height = wxMin(height, clipheight);
 351
 352     wxBitmap bmp;
 353
 354     GdkImage *img = (GdkImage*) NULL;
 355     if (GetPixmap())
 356         img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
 357     else if (GetBitmap())
 358         img = gdk_image_get( GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 359     else
 360         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 361
 362     wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
 363
 364     int bpp = -1;
 365
 366
 367     GdkGC *gc = NULL;
 368     GdkPixmap *dstpix = NULL;
 369     if (GetPixmap())
 370     {
 371         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 372         if (visual == NULL)
 373             visual = wxTheApp->GetGdkVisual();
 374
 375         bpp = visual->depth;
 376         bmp = wxBitmap(width,height,bpp);
 377         dstpix = bmp.GetPixmap();
 378         gc = gdk_gc_new( dstpix );
 379     }
 380
 381     char *dst = NULL;
 382     long dstbyteperline = 0;
 383
 384     if (GetBitmap())
 385     {
 386         bpp = 1;
 387         dstbyteperline = width/8*M_BMPDATA->m_bpp;
 388         if (width*M_BMPDATA->m_bpp % 8 != 0)
 389             dstbyteperline++;
 390         dst = (char*) malloc(dstbyteperline*height);
 391     }
 392
 393     // be careful to use the right scaling factor
 394     float scx = (float)M_BMPDATA->m_width/(float)newx;
 395     float scy = (float)M_BMPDATA->m_height/(float)newy;
 396     // prepare accel-tables
 397     int *tablex = (int *)calloc(width,sizeof(int));
 398     int *tabley = (int *)calloc(height,sizeof(int));
 399
 400     // accel table filled with clipped values
 401     for (int x = 0; x < width; x++)
 402         tablex[x] = (int) (scx * (x+clipx));
 403     for (int y = 0; y < height; y++)
 404         tabley[y] = (int) (scy * (y+clipy));
 405
 406     // Main rescaling routine starts here
 407     for (int h = 0; h < height; h++)
 408     {
 409         char outbyte = 0;
 410         int old_x = -1;
 411         guint32 old_pixval = 0;
 412
 413         for (int w = 0; w < width; w++)
 414         {
 415             guint32 pixval;
 416             int x = tablex[w];
 417             if (x == old_x)
 418                 pixval = old_pixval;
 419             else
 420             {
 421                 pixval = gdk_image_get_pixel( img, x, tabley[h] );
 422                 old_pixval = pixval;
 423                 old_x = x;
 424             }
 425
 426             if (bpp == 1)
 427             {
 428                 if (!pixval)
 429                 {
 430                     char bit=1;
 431                     char shift = bit << (w % 8);
 432                     outbyte |= shift;
 433                 }
 434
 435                 if ((w+1)%8==0)
 436                 {
 437                     dst[h*dstbyteperline+w/8] = outbyte;
 438                     outbyte = 0;
 439                 }
 440             }
 441             else
 442             {
 443                 GdkColor col;
 444                 col.pixel = pixval;
 445                 gdk_gc_set_foreground( gc, &col );
 446                 gdk_draw_point( dstpix, gc, w, h);
 447             }
 448         }
 449
 450         // do not forget the last byte
 451         if ((bpp == 1) && (width % 8 != 0))
 452             dst[h*dstbyteperline+width/8] = outbyte;
 453     }
 454
 455     gdk_image_destroy( img );
 456     if (gc) gdk_gc_unref( gc );
 457
 458     if (bpp == 1)
 459     {
 460         bmp = wxBitmap( (const char *)dst, width, height, 1 );
 461         free( dst );
 462     }
 463
 464     if (GetMask())
 465     {
 466         dstbyteperline = width/8;
 467         if (width % 8 != 0)
 468             dstbyteperline++;
 469         dst = (char*) malloc(dstbyteperline*height);
 470         img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 471
 472         for (int h = 0; h < height; h++)
 473         {
 474             char outbyte = 0;
 475             int old_x = -1;
 476             guint32 old_pixval = 0;
 477
 478             for (int w = 0; w < width; w++)
 479             {
 480                 guint32 pixval;
 481                 int x = tablex[w];
 482                 if (x == old_x)
 483                     pixval = old_pixval;
 484                 else
 485                 {
 486                     pixval = gdk_image_get_pixel( img, x, tabley[h] );
 487                     old_pixval = pixval;
 488                     old_x = x;
 489                 }
 490
 491                 if (pixval)
 492                 {
 493                     char bit=1;
 494                     char shift = bit << (w % 8);
 495                     outbyte |= shift;
 496                 }
 497
 498                 if ((w+1)%8 == 0)
 499                 {
 500                     dst[h*dstbyteperline+w/8] = outbyte;
 501                     outbyte = 0;
 502                 }
 503             }
 504
 505             // do not forget the last byte
 506             if (width % 8 != 0)
 507                 dst[h*dstbyteperline+width/8] = outbyte;
 508         }
 509         wxMask* mask = new wxMask;
 510         mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
 511         bmp.SetMask(mask);
 512
 513         free( dst );
 514         gdk_image_destroy( img );
 515     }
 516
 517     free( tablex );
 518     free( tabley );
 519
 520     return bmp;
 521 }
 522
 523 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 524 {
 525     UnRef();
 526
 527     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 528     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 529
 530     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 531         return false;
 532
 533     m_refData = new wxBitmapRefData();
 534
 535     if (depth == 1)
 536     {
 537         return CreateFromImageAsBitmap(image);
 538     }
 539     else
 540     {
 541         return CreateFromImageAsPixmap(image);
 542     }
 543 }
 544
 545 // conversion to mono bitmap:
 546 bool wxBitmap::CreateFromImageAsBitmap(const wxImage& img)
 547 {
 548     // convert alpha channel to mask, if it is present:
 549     wxImage image(img);
 550     image.ConvertAlphaToMask();
 551
 552     int width = image.GetWidth();
 553     int height = image.GetHeight();
 554
 555     SetHeight( height );
 556     SetWidth( width );
 557
 558     SetBitmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 559
 560     SetDepth( 1 );
 561
 562     GdkVisual *visual = wxTheApp->GetGdkVisual();
 563
 564     // Create picture image
 565
 566     unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 567
 568     GdkImage *data_image =
 569         gdk_image_new_bitmap( visual, data_data, width, height );
 570
 571     // Create mask image
 572
 573     GdkImage *mask_image = (GdkImage*) NULL;
 574
 575     if (image.HasMask())
 576     {
 577         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 578
 579         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 580
 581         wxMask *mask = new wxMask();
 582         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 583
 584         SetMask( mask );
 585     }
 586
 587     int r_mask = image.GetMaskRed();
 588     int g_mask = image.GetMaskGreen();
 589     int b_mask = image.GetMaskBlue();
 590
 591     unsigned char* data = image.GetData();
 592
 593     int index = 0;
 594     for (int y = 0; y < height; y++)
 595     {
 596         for (int x = 0; x < width; x++)
 597         {
 598             int r = data[index];
 599             index++;
 600             int g = data[index];
 601             index++;
 602             int b = data[index];
 603             index++;
 604
 605             if (image.HasMask())
 606             {
 607                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 608                     gdk_image_put_pixel( mask_image, x, y, 1 );
 609                 else
 610                     gdk_image_put_pixel( mask_image, x, y, 0 );
 611             }
 612
 613             if ((r == 255) && (b == 255) && (g == 255))
 614                 gdk_image_put_pixel( data_image, x, y, 1 );
 615             else
 616                 gdk_image_put_pixel( data_image, x, y, 0 );
 617
 618         } // for
 619     }  // for
 620
 621     // Blit picture
 622
 623     GdkGC *data_gc = gdk_gc_new( GetBitmap() );
 624
 625     gdk_draw_image( GetBitmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 626
 627     gdk_image_destroy( data_image );
 628     gdk_gc_unref( data_gc );
 629
 630     // Blit mask
 631
 632     if (image.HasMask())
 633     {
 634         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 635
 636         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 637
 638         gdk_image_destroy( mask_image );
 639         gdk_gc_unref( mask_gc );
 640     }
 641
 642     return true;
 643 }
 644
 645 // conversion to colour bitmap:
 646 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& img)
 647 {
 648     // convert alpha channel to mask, if it is present:
 649     wxImage image(img);
 650     image.ConvertAlphaToMask();
 651
 652     int width = image.GetWidth();
 653     int height = image.GetHeight();
 654
 655     SetHeight( height );
 656     SetWidth( width );
 657
 658     SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 659
 660     GdkVisual *visual = wxTheApp->GetGdkVisual();
 661
 662     int bpp = visual->depth;
 663
 664     SetDepth( bpp );
 665
 666     if ((bpp == 16) && (visual->red_mask != 0xf800))
 667         bpp = 15;
 668     else if (bpp < 8)
 669         bpp = 8;
 670
 671     // We handle 8-bit bitmaps ourselves using the colour cube, 12-bit
 672     // visuals are not supported by GDK so we do these ourselves, too.
 673     // 15-bit and 16-bit should actually work and 24-bit certainly does.
 674 #ifdef __sgi
 675     if (!image.HasMask() && (bpp > 16))
 676 #else
 677     if (!image.HasMask() && (bpp > 12))
 678 #endif
 679     {
 680         static bool s_hasInitialized = false;
 681
 682         if (!s_hasInitialized)
 683         {
 684             gdk_rgb_init();
 685             s_hasInitialized = true;
 686         }
 687
 688         GdkGC *gc = gdk_gc_new( GetPixmap() );
 689
 690         gdk_draw_rgb_image( GetPixmap(),
 691                             gc,
 692                             0, 0,
 693                             width, height,
 694                             GDK_RGB_DITHER_NONE,
 695                             image.GetData(),
 696                             width*3 );
 697
 698         gdk_gc_unref( gc );
 699         return true;
 700     }
 701
 702     // Create picture image
 703
 704     GdkImage *data_image =
 705         gdk_image_new( GDK_IMAGE_FASTEST, visual, width, height );
 706
 707     // Create mask image
 708
 709     GdkImage *mask_image = (GdkImage*) NULL;
 710
 711     if (image.HasMask())
 712     {
 713         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 714
 715         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 716
 717         wxMask *mask = new wxMask();
 718         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 719
 720         SetMask( mask );
 721     }
 722
 723     // Render
 724
 725     enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
 726     byte_order b_o = RGB;
 727
 728     if (bpp > 8)
 729     {
 730         if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
 731         else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RBG;
 732         else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
 733         else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
 734         else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
 735         else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
 736     }
 737
 738     int r_mask = image.GetMaskRed();
 739     int g_mask = image.GetMaskGreen();
 740     int b_mask = image.GetMaskBlue();
 741
 742     unsigned char* data = image.GetData();
 743
 744     int index = 0;
 745     for (int y = 0; y < height; y++)
 746     {
 747         for (int x = 0; x < width; x++)
 748         {
 749             int r = data[index];
 750             index++;
 751             int g = data[index];
 752             index++;
 753             int b = data[index];
 754             index++;
 755
 756             if (image.HasMask())
 757             {
 758                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 759                     gdk_image_put_pixel( mask_image, x, y, 1 );
 760                 else
 761                     gdk_image_put_pixel( mask_image, x, y, 0 );
 762             }
 763
 764             switch (bpp)
 765             {
 766                 case 8:
 767                 {
 768                     int pixel = -1;
 769                     if (wxTheApp->m_colorCube)
 770                     {
 771                         pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
 772                     }
 773                     else
 774                     {
 775                         GdkColormap *cmap = gtk_widget_get_default_colormap();
 776                         GdkColor *colors = cmap->colors;
 777                         int max = 3 * (65536);
 778
 779                         for (int i = 0; i < cmap->size; i++)
 780                         {
 781                             int rdiff = (r << 8) - colors[i].red;
 782                             int gdiff = (g << 8) - colors[i].green;
 783                             int bdiff = (b << 8) - colors[i].blue;
 784                             int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 785                             if (sum < max) { pixel = i; max = sum; }
 786                         }
 787                     }
 788
 789                     gdk_image_put_pixel( data_image, x, y, pixel );
 790
 791                     break;
 792                 }
 793                 case 12:  // SGI only
 794                 {
 795                     guint32 pixel = 0;
 796                     switch (b_o)
 797                     {
 798                         case RGB: pixel = ((r & 0xf0) << 4) | (g & 0xf0) | ((b & 0xf0) >> 4); break;
 799                         case RBG: pixel = ((r & 0xf0) << 4) | (b & 0xf0) | ((g & 0xf0) >> 4); break;
 800                         case GRB: pixel = ((g & 0xf0) << 4) | (r & 0xf0) | ((b & 0xf0) >> 4); break;
 801                         case GBR: pixel = ((g & 0xf0) << 4) | (b & 0xf0) | ((r & 0xf0) >> 4); break;
 802                         case BRG: pixel = ((b & 0xf0) << 4) | (r & 0xf0) | ((g & 0xf0) >> 4); break;
 803                         case BGR: pixel = ((b & 0xf0) << 4) | (g & 0xf0) | ((r & 0xf0) >> 4); break;
 804                     }
 805                     gdk_image_put_pixel( data_image, x, y, pixel );
 806                     break;
 807                 }
 808                 case 15:
 809                 {
 810                     guint32 pixel = 0;
 811                     switch (b_o)
 812                     {
 813                         case RGB: pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 814                         case RBG: pixel = ((r & 0xf8) << 7) | ((b & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 815                         case GRB: pixel = ((g & 0xf8) << 7) | ((r & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 816                         case GBR: pixel = ((g & 0xf8) << 7) | ((b & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 817                         case BRG: pixel = ((b & 0xf8) << 7) | ((r & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 818                         case BGR: pixel = ((b & 0xf8) << 7) | ((g & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 819                     }
 820                     gdk_image_put_pixel( data_image, x, y, pixel );
 821                     break;
 822                 }
 823                 case 16:
 824                 {
 825                     // I actually don't know if for 16-bit displays, it is alway the green
 826                     // component or the second component which has 6 bits.
 827                     guint32 pixel = 0;
 828                     switch (b_o)
 829                     {
 830                         case RGB: pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 831                         case RBG: pixel = ((r & 0xf8) << 8) | ((b & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 832                         case GRB: pixel = ((g & 0xf8) << 8) | ((r & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 833                         case GBR: pixel = ((g & 0xf8) << 8) | ((b & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 834                         case BRG: pixel = ((b & 0xf8) << 8) | ((r & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 835                         case BGR: pixel = ((b & 0xf8) << 8) | ((g & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 836                     }
 837                     gdk_image_put_pixel( data_image, x, y, pixel );
 838                     break;
 839                 }
 840                 case 32:
 841                 case 24:
 842                 {
 843                     guint32 pixel = 0;
 844                     switch (b_o)
 845                     {
 846                         case RGB: pixel = (r << 16) | (g << 8) | b; break;
 847                         case RBG: pixel = (r << 16) | (b << 8) | g; break;
 848                         case BRG: pixel = (b << 16) | (r << 8) | g; break;
 849                         case BGR: pixel = (b << 16) | (g << 8) | r; break;
 850                         case GRB: pixel = (g << 16) | (r << 8) | b; break;
 851                         case GBR: pixel = (g << 16) | (b << 8) | r; break;
 852                     }
 853                     gdk_image_put_pixel( data_image, x, y, pixel );
 854                     break;
 855                 }
 856                 default: break;
 857             }
 858         } // for
 859     }  // for
 860
 861     // Blit picture
 862
 863     GdkGC *data_gc = gdk_gc_new( GetPixmap() );
 864
 865     gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 866
 867     gdk_image_destroy( data_image );
 868     gdk_gc_unref( data_gc );
 869
 870     // Blit mask
 871
 872     if (image.HasMask())
 873     {
 874         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 875
 876         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 877
 878         gdk_image_destroy( mask_image );
 879         gdk_gc_unref( mask_gc );
 880     }
 881
 882     return true;
 883 }
 884
 885 wxImage wxBitmap::ConvertToImage() const
 886 {
 887     wxImage image;
 888
 889     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 890
 891     image.Create(GetWidth(), GetHeight());
 892     unsigned char *data = image.GetData();
 893
 894     if (!data)
 895     {
 896         wxFAIL_MSG( wxT("couldn't create image") );
 897         return wxNullImage;
 898     }
 899
 900     // the colour used as transparent one in wxImage and the one it is
 901     // replaced with when it really occurs in the bitmap
 902     static const int MASK_RED = 1;
 903     static const int MASK_GREEN = 2;
 904     static const int MASK_BLUE = 3;
 905     static const int MASK_BLUE_REPLACEMENT = 2;
 906
 907     GdkImage *gdk_image = (GdkImage*) NULL;
 908
 909     if (HasPixmap())
 910     {
 911         gdk_image = gdk_image_get( GetPixmap(),
 912                                     0, 0,
 913                                     GetWidth(), GetHeight() );
 914     }
 915     else if (GetBitmap())
 916     {
 917         gdk_image = gdk_image_get( GetBitmap(),
 918                                     0, 0,
 919                                     GetWidth(), GetHeight() );
 920     }
 921     else
 922     {
 923         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 924     }
 925
 926     wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
 927
 928     GdkImage *gdk_image_mask = (GdkImage*) NULL;
 929     if (GetMask())
 930     {
 931         gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
 932                                         0, 0,
 933                                         GetWidth(), GetHeight() );
 934
 935         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
 936     }
 937
 938     int bpp = -1;
 939     int red_shift_right = 0;
 940     int green_shift_right = 0;
 941     int blue_shift_right = 0;
 942     int red_shift_left = 0;
 943     int green_shift_left = 0;
 944     int blue_shift_left = 0;
 945     bool use_shift = false;
 946
 947     if (GetPixmap())
 948     {
 949         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 950         if (visual == NULL)
 951             visual = wxTheApp->GetGdkVisual();
 952
 953         bpp = visual->depth;
 954         if (bpp == 16)
 955             bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
 956         red_shift_right = visual->red_shift;
 957         red_shift_left = 8-visual->red_prec;
 958         green_shift_right = visual->green_shift;
 959         green_shift_left = 8-visual->green_prec;
 960         blue_shift_right = visual->blue_shift;
 961         blue_shift_left = 8-visual->blue_prec;
 962
 963         use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
 964     }
 965     if (GetBitmap())
 966     {
 967         bpp = 1;
 968     }
 969
 970
 971     GdkColormap *cmap = gtk_widget_get_default_colormap();
 972
 973     long pos = 0;
 974     for (int j = 0; j < GetHeight(); j++)
 975     {
 976         for (int i = 0; i < GetWidth(); i++)
 977         {
 978             wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
 979             if (bpp == 1)
 980             {
 981                 if (pixel == 0)
 982                 {
 983                     data[pos]   = 0;
 984                     data[pos+1] = 0;
 985                     data[pos+2] = 0;
 986                 }
 987                 else
 988                 {
 989                     data[pos]   = 255;
 990                     data[pos+1] = 255;
 991                     data[pos+2] = 255;
 992                 }
 993             }
 994             else if (use_shift)
 995             {
 996                 data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
 997                 data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
 998                 data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
 999             }
1000             else if (cmap->colors)
1001             {
1002                 data[pos] =   cmap->colors[pixel].red   >> 8;
1003                 data[pos+1] = cmap->colors[pixel].green >> 8;
1004                 data[pos+2] = cmap->colors[pixel].blue  >> 8;
1005             }
1006             else
1007             {
1008                 wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
1009             }
1010
1011             if (gdk_image_mask)
1012             {
1013                 int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
1014                 if (mask_pixel == 0)
1015                 {
1016                     data[pos] = MASK_RED;
1017                     data[pos+1] = MASK_GREEN;
1018                     data[pos+2] = MASK_BLUE;
1019                 }
1020                 else if ( data[pos] == MASK_RED &&
1021                             data[pos+1] == MASK_GREEN &&
1022                                 data[pos+2] == MASK_BLUE )
1023                 {
1024                     data[pos+2] = MASK_BLUE_REPLACEMENT;
1025                 }
1026             }
1027
1028             pos += 3;
1029         }
1030     }
1031
1032     gdk_image_destroy( gdk_image );
1033     if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
1034
1035     return image;
1036 }
1037
1038 wxBitmap::wxBitmap( const wxString &filename, wxBitmapType type )
1039 {
1040     LoadFile( filename, type );
1041 }
1042
1043 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
1044 {
1045     if ( width > 0 && height > 0 )
1046     {
1047         m_refData = new wxBitmapRefData();
1048
1049         M_BMPDATA->m_mask = (wxMask *) NULL;
1050         M_BMPDATA->m_bitmap = gdk_bitmap_create_from_data
1051                               (
1052                                 wxGetRootWindow()->window,
1053                                 (gchar *) bits,
1054                                 width,
1055                                 height
1056                               );
1057         M_BMPDATA->m_width = width;
1058         M_BMPDATA->m_height = height;
1059         M_BMPDATA->m_bpp = 1;
1060
1061         wxASSERT_MSG( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
1062     }
1063 }
1064
1065 wxBitmap::~wxBitmap()
1066 {
1067 }
1068
1069 bool wxBitmap::IsOk() const
1070 {
1071     return (m_refData != NULL) &&
1072            (M_BMPDATA->m_bitmap || M_BMPDATA->m_pixmap);
1073 }
1074
1075 int wxBitmap::GetHeight() const
1076 {
1077     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1078
1079     return M_BMPDATA->m_height;
1080 }
1081
1082 int wxBitmap::GetWidth() const
1083 {
1084     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1085
1086     return M_BMPDATA->m_width;
1087 }
1088
1089 int wxBitmap::GetDepth() const
1090 {
1091     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1092
1093     return M_BMPDATA->m_bpp;
1094 }
1095
1096 wxMask *wxBitmap::GetMask() const
1097 {
1098     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1099
1100     return M_BMPDATA->m_mask;
1101 }
1102
1103 void wxBitmap::SetMask( wxMask *mask )
1104 {
1105     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
1106
1107     AllocExclusive();
1108     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
1109
1110     M_BMPDATA->m_mask = mask;
1111 }
1112
1113 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
1114 {
1115     *this = icon;
1116     return true;
1117 }
1118
1119 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1120 {
1121     wxCHECK_MSG( Ok() &&
1122                  (rect.x >= 0) && (rect.y >= 0) &&
1123                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
1124                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1125
1126     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
1127     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1128
1129     if (ret.GetPixmap())
1130     {
1131         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1132         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1133         gdk_gc_destroy( gc );
1134     }
1135     else
1136     {
1137         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
1138         GdkColor col;
1139         col.pixel = 0xFFFFFF;
1140         gdk_gc_set_foreground( gc, &col );
1141         col.pixel = 0;
1142         gdk_gc_set_background( gc, &col );
1143         gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1144         gdk_gc_destroy( gc );
1145     }
1146
1147     if (GetMask())
1148     {
1149         wxMask *mask = new wxMask;
1150         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
1151
1152         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
1153         GdkColor col;
1154         col.pixel = 0xFFFFFF;
1155         gdk_gc_set_foreground( gc, &col );
1156         col.pixel = 0;
1157         gdk_gc_set_background( gc, &col );
1158         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height );
1159         gdk_gc_destroy( gc );
1160
1161         ret.SetMask( mask );
1162     }
1163
1164     return ret;
1165 }
1166
1167 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
1168 {
1169     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1170
1171     // Try to save the bitmap via wxImage handlers:
1172     {
1173         wxImage image = ConvertToImage();
1174         if (image.Ok()) return image.SaveFile( name, type );
1175     }
1176
1177     return false;
1178 }
1179
1180 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
1181 {
1182     UnRef();
1183
1184     if (!wxFileExists(name))
1185         return false;
1186
1187     GdkVisual *visual = wxTheApp->GetGdkVisual();
1188
1189     if (type == wxBITMAP_TYPE_XPM)
1190     {
1191         m_refData = new wxBitmapRefData();
1192
1193         GdkBitmap *mask = (GdkBitmap*) NULL;
1194
1195         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
1196                               (
1197                                 wxGetRootWindow()->window,
1198                                 &mask,
1199                                 NULL,
1200                                 name.fn_str()
1201                               );
1202
1203         if (mask)
1204         {
1205            M_BMPDATA->m_mask = new wxMask();
1206            M_BMPDATA->m_mask->m_bitmap = mask;
1207         }
1208
1209         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
1210
1211         M_BMPDATA->m_bpp = visual->depth;
1212     }
1213     else // try if wxImage can load it
1214     {
1215         wxImage image;
1216         if ( !image.LoadFile( name, type ) || !image.Ok() )
1217             return false;
1218
1219         *this = wxBitmap(image);
1220     }
1221
1222     return true;
1223 }
1224
1225 #if wxUSE_PALETTE
1226 wxPalette *wxBitmap::GetPalette() const
1227 {
1228     if (!Ok())
1229         return (wxPalette *) NULL;
1230
1231     return M_BMPDATA->m_palette;
1232 }
1233
1234 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
1235 {
1236     // TODO
1237 }
1238 #endif // wxUSE_PALETTE
1239
1240 void wxBitmap::SetHeight( int height )
1241 {
1242     AllocExclusive();
1243     M_BMPDATA->m_height = height;
1244 }
1245
1246 void wxBitmap::SetWidth( int width )
1247 {
1248     AllocExclusive();
1249     M_BMPDATA->m_width = width;
1250 }
1251
1252 void wxBitmap::SetDepth( int depth )
1253 {
1254     AllocExclusive();
1255     M_BMPDATA->m_bpp = depth;
1256 }
1257
1258 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1259 {
1260     if (!m_refData)
1261         m_refData = new wxBitmapRefData();
1262
1263     M_BMPDATA->m_pixmap = pixmap;
1264 }
1265
1266 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
1267 {
1268     if (!m_refData)
1269         m_refData = new wxBitmapRefData();
1270
1271     M_BMPDATA->m_bitmap = bitmap;
1272 }
1273
1274 GdkPixmap *wxBitmap::GetPixmap() const
1275 {
1276     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
1277
1278     return M_BMPDATA->m_pixmap;
1279 }
1280
1281 bool wxBitmap::HasPixmap() const
1282 {
1283     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1284
1285     return M_BMPDATA->m_pixmap != NULL;
1286 }
1287
1288 GdkBitmap *wxBitmap::GetBitmap() const
1289 {
1290     wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, wxT("invalid bitmap") );
1291
1292     return M_BMPDATA->m_bitmap;
1293 }
1294
1295 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1296 {
1297     return NULL;
1298 }
1299
1300 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
1301 {
1302 }
1303
1304 bool wxBitmap::HasAlpha() const
1305 {
1306     return false;
1307 }
1308
1309 void wxBitmap::UseAlpha()
1310 {
1311 }
1312
1313 //-----------------------------------------------------------------------------
1314 // wxBitmapHandler
1315 //-----------------------------------------------------------------------------
1316
1317 IMPLEMENT_ABSTRACT_CLASS(wxBitmapHandler, wxBitmapHandlerBase)
1318
1319 /* static */ void wxBitmap::InitStandardHandlers()
1320 {
1321     // TODO: Insert handler based on GdkPixbufs handler later
1322 }