src/gtk/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "bitmap.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/defs.h"
  18
  19 #include "wx/palette.h"
  20 #include "wx/bitmap.h"
  21 #include "wx/icon.h"
  22 #include "wx/filefn.h"
  23 #include "wx/image.h"
  24 #include "wx/dcmemory.h"
  25 #include "wx/app.h"
  26
  27 #ifdef __WXGTK20__
  28     // need this to get gdk_image_new_bitmap()
  29     #define GDK_ENABLE_BROKEN
  30 #endif
  31
  32 #include <gdk/gdk.h>
  33 #include <gtk/gtk.h>
  34 #include <gdk/gdkx.h>
  35
  36 #ifdef __WXGTK20__
  37     #include <gdk/gdkimage.h>
  38 #else // GTK+ 1.2
  39     #include <gdk/gdkrgb.h>
  40 #endif // GTK+ 2.0/1.2
  41
  42 extern void gdk_wx_draw_bitmap     (GdkDrawable  *drawable,
  43                           GdkGC               *gc,
  44                           GdkDrawable  *src,
  45                           gint                xsrc,
  46                           gint                ysrc,
  47                           gint                xdest,
  48                           gint                ydest,
  49                           gint                width,
  50                           gint                height);
  51
  52 //-----------------------------------------------------------------------------
  53 // data
  54 //-----------------------------------------------------------------------------
  55
  56 extern GtkWidget *wxGetRootWindow();
  57
  58 //-----------------------------------------------------------------------------
  59 // wxMask
  60 //-----------------------------------------------------------------------------
  61
  62 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  63
  64 wxMask::wxMask()
  65 {
  66     m_bitmap = (GdkBitmap *) NULL;
  67 }
  68
  69 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  70 {
  71     m_bitmap = (GdkBitmap *) NULL;
  72     Create( bitmap, colour );
  73 }
  74
  75 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  76 {
  77     m_bitmap = (GdkBitmap *) NULL;
  78     Create( bitmap, paletteIndex );
  79 }
  80
  81 wxMask::wxMask( const wxBitmap& bitmap )
  82 {
  83     m_bitmap = (GdkBitmap *) NULL;
  84     Create( bitmap );
  85 }
  86
  87 wxMask::~wxMask()
  88 {
  89     if (m_bitmap)
  90         gdk_bitmap_unref( m_bitmap );
  91 }
  92
  93 bool wxMask::Create( const wxBitmap& bitmap,
  94                      const wxColour& colour )
  95 {
  96     if (m_bitmap)
  97     {
  98         gdk_bitmap_unref( m_bitmap );
  99         m_bitmap = (GdkBitmap*) NULL;
 100     }
 101
 102     wxImage image = bitmap.ConvertToImage();
 103     if (!image.Ok()) return FALSE;
 104
 105     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, image.GetWidth(), image.GetHeight(), 1 );
 106     GdkGC *gc = gdk_gc_new( m_bitmap );
 107
 108     GdkColor color;
 109     color.red = 65000;
 110     color.green = 65000;
 111     color.blue = 65000;
 112     color.pixel = 1;
 113     gdk_gc_set_foreground( gc, &color );
 114     gdk_gc_set_fill( gc, GDK_SOLID );
 115     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
 116
 117     unsigned char *data = image.GetData();
 118     int index = 0;
 119
 120     unsigned char red = colour.Red();
 121     unsigned char green = colour.Green();
 122     unsigned char blue = colour.Blue();
 123
 124     GdkVisual *visual = wxTheApp->GetGdkVisual();
 125
 126     int bpp = visual->depth;
 127     if ((bpp == 16) && (visual->red_mask != 0xf800))
 128         bpp = 15;
 129     if (bpp == 15)
 130     {
 131         red = red & 0xf8;
 132         green = green & 0xf8;
 133         blue = blue & 0xf8;
 134     }
 135     else if (bpp == 16)
 136     {
 137         red = red & 0xf8;
 138         green = green & 0xfc;
 139         blue = blue & 0xf8;
 140     }
 141     else if (bpp == 12)
 142     {
 143         red = red & 0xf0;
 144         green = green & 0xf0;
 145         blue = blue & 0xf0;
 146     }
 147
 148     color.red = 0;
 149     color.green = 0;
 150     color.blue = 0;
 151     color.pixel = 0;
 152     gdk_gc_set_foreground( gc, &color );
 153
 154     for (int j = 0; j < image.GetHeight(); j++)
 155     {
 156         int start_x = -1;
 157         int i;
 158         for (i = 0; i < image.GetWidth(); i++)
 159         {
 160             if ((data[index] == red) &&
 161                 (data[index+1] == green) &&
 162                 (data[index+2] == blue))
 163             {
 164                 if (start_x == -1)
 165                 start_x = i;
 166             }
 167             else
 168             {
 169                 if (start_x != -1)
 170                 {
 171                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 172                     start_x = -1;
 173                 }
 174             }
 175             index += 3;
 176         }
 177         if (start_x != -1)
 178             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 179     }
 180
 181     gdk_gc_unref( gc );
 182
 183     return TRUE;
 184 }
 185
 186 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 187 {
 188     unsigned char r,g,b;
 189     wxPalette *pal = bitmap.GetPalette();
 190
 191     wxCHECK_MSG( pal, FALSE, wxT("Cannot create mask from bitmap without palette") );
 192
 193     pal->GetRGB(paletteIndex, &r, &g, &b);
 194
 195     return Create(bitmap, wxColour(r, g, b));
 196 }
 197
 198 bool wxMask::Create( const wxBitmap& bitmap )
 199 {
 200     if (m_bitmap)
 201     {
 202         gdk_bitmap_unref( m_bitmap );
 203         m_bitmap = (GdkBitmap*) NULL;
 204     }
 205
 206     if (!bitmap.Ok()) return FALSE;
 207
 208     wxCHECK_MSG( bitmap.GetBitmap(), FALSE, wxT("Cannot create mask from colour bitmap") );
 209
 210     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 211
 212     if (!m_bitmap) return FALSE;
 213
 214     GdkGC *gc = gdk_gc_new( m_bitmap );
 215
 216     gdk_wx_draw_bitmap( m_bitmap, gc, bitmap.GetBitmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
 217
 218     gdk_gc_unref( gc );
 219
 220     return TRUE;
 221 }
 222
 223 GdkBitmap *wxMask::GetBitmap() const
 224 {
 225     return m_bitmap;
 226 }
 227
 228 //-----------------------------------------------------------------------------
 229 // wxBitmap
 230 //-----------------------------------------------------------------------------
 231
 232 class wxBitmapRefData: public wxObjectRefData
 233 {
 234 public:
 235     wxBitmapRefData();
 236     ~wxBitmapRefData();
 237
 238     GdkPixmap      *m_pixmap;
 239     GdkBitmap      *m_bitmap;
 240     wxMask         *m_mask;
 241     int             m_width;
 242     int             m_height;
 243     int             m_bpp;
 244     wxPalette      *m_palette;
 245 };
 246
 247 wxBitmapRefData::wxBitmapRefData()
 248 {
 249     m_pixmap = (GdkPixmap *) NULL;
 250     m_bitmap = (GdkBitmap *) NULL;
 251     m_mask = (wxMask *) NULL;
 252     m_width = 0;
 253     m_height = 0;
 254     m_bpp = 0;
 255     m_palette = (wxPalette *) NULL;
 256 }
 257
 258 wxBitmapRefData::~wxBitmapRefData()
 259 {
 260     if (m_pixmap)
 261         gdk_pixmap_unref( m_pixmap );
 262     if (m_bitmap)
 263         gdk_bitmap_unref( m_bitmap );
 264     delete m_mask;
 265     delete m_palette;
 266 }
 267
 268 //-----------------------------------------------------------------------------
 269
 270 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 271
 272 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 273
 274 wxBitmap::wxBitmap()
 275 {
 276 }
 277
 278 wxBitmap::wxBitmap( int width, int height, int depth )
 279 {
 280     Create( width, height, depth );
 281 }
 282
 283 bool wxBitmap::Create( int width, int height, int depth )
 284 {
 285     UnRef();
 286
 287     if ( width <= 0 || height <= 0 )
 288     {
 289         return false;
 290     }
 291
 292     GdkVisual *visual = wxTheApp->GetGdkVisual();
 293
 294     if (depth == -1)
 295         depth = visual->depth;
 296
 297     wxCHECK_MSG( (depth == visual->depth) || (depth == 1), FALSE,
 298                     wxT("invalid bitmap depth") )
 299
 300     m_refData = new wxBitmapRefData();
 301     M_BMPDATA->m_mask = (wxMask *) NULL;
 302     M_BMPDATA->m_width = width;
 303     M_BMPDATA->m_height = height;
 304     if (depth == 1)
 305     {
 306         M_BMPDATA->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 307         M_BMPDATA->m_bpp = 1;
 308     }
 309     else
 310     {
 311         M_BMPDATA->m_pixmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, depth );
 312         M_BMPDATA->m_bpp = visual->depth;
 313     }
 314
 315     return Ok();
 316 }
 317
 318 bool wxBitmap::CreateFromXpm( const char **bits )
 319 {
 320     UnRef();
 321
 322     wxCHECK_MSG( bits != NULL, FALSE, wxT("invalid bitmap data") )
 323
 324     GdkVisual *visual = wxTheApp->GetGdkVisual();
 325
 326     m_refData = new wxBitmapRefData();
 327
 328     GdkBitmap *mask = (GdkBitmap*) NULL;
 329
 330     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxGetRootWindow()->window, &mask, NULL, (gchar **) bits );
 331
 332     wxCHECK_MSG( M_BMPDATA->m_pixmap, FALSE, wxT("couldn't create pixmap") );
 333
 334     if (mask)
 335     {
 336         M_BMPDATA->m_mask = new wxMask();
 337         M_BMPDATA->m_mask->m_bitmap = mask;
 338     }
 339
 340     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 341
 342     M_BMPDATA->m_bpp = visual->depth;  // Can we get a different depth from create_from_xpm_d() ?
 343
 344     return TRUE;
 345 }
 346
 347 bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
 348 {
 349     UnRef();
 350
 351     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
 352     wxCHECK_MSG( depth == -1 || depth == 1, FALSE, wxT("invalid bitmap depth") )
 353
 354     int width = image.GetWidth();
 355     int height = image.GetHeight();
 356
 357     if ( width <= 0 || height <= 0 )
 358     {
 359         return false;
 360     }
 361
 362     m_refData = new wxBitmapRefData();
 363
 364     SetHeight( height );
 365     SetWidth( width );
 366
 367     // ------
 368     // conversion to mono bitmap:
 369     // ------
 370     if (depth == 1)
 371     {
 372         SetBitmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 373
 374         SetDepth( 1 );
 375
 376         GdkVisual *visual = wxTheApp->GetGdkVisual();
 377
 378         // Create picture image
 379
 380         unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 381
 382         GdkImage *data_image =
 383             gdk_image_new_bitmap( visual, data_data, width, height );
 384
 385         // Create mask image
 386
 387         GdkImage *mask_image = (GdkImage*) NULL;
 388
 389         if (image.HasMask())
 390         {
 391             unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 392
 393             mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 394
 395             wxMask *mask = new wxMask();
 396             mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 397
 398             SetMask( mask );
 399         }
 400
 401         int r_mask = image.GetMaskRed();
 402         int g_mask = image.GetMaskGreen();
 403         int b_mask = image.GetMaskBlue();
 404
 405         unsigned char* data = image.GetData();
 406
 407         int index = 0;
 408         for (int y = 0; y < height; y++)
 409         {
 410             for (int x = 0; x < width; x++)
 411             {
 412                 int r = data[index];
 413                 index++;
 414                 int g = data[index];
 415                 index++;
 416                 int b = data[index];
 417                 index++;
 418
 419                 if (image.HasMask())
 420                 {
 421                     if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 422                         gdk_image_put_pixel( mask_image, x, y, 1 );
 423                     else
 424                         gdk_image_put_pixel( mask_image, x, y, 0 );
 425                 }
 426
 427                 if ((r == 255) && (b == 255) && (g == 255))
 428                     gdk_image_put_pixel( data_image, x, y, 1 );
 429                 else
 430                     gdk_image_put_pixel( data_image, x, y, 0 );
 431
 432             } // for
 433         }  // for
 434
 435         // Blit picture
 436
 437         GdkGC *data_gc = gdk_gc_new( GetBitmap() );
 438
 439         gdk_draw_image( GetBitmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 440
 441         gdk_image_destroy( data_image );
 442         gdk_gc_unref( data_gc );
 443
 444         // Blit mask
 445
 446         if (image.HasMask())
 447         {
 448             GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 449
 450             gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 451
 452             gdk_image_destroy( mask_image );
 453             gdk_gc_unref( mask_gc );
 454         }
 455     }
 456
 457     // ------
 458     // conversion to colour bitmap:
 459     // ------
 460     else
 461     {
 462         SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 463
 464         GdkVisual *visual = wxTheApp->GetGdkVisual();
 465
 466         int bpp = visual->depth;
 467
 468         SetDepth( bpp );
 469
 470         if ((bpp == 16) && (visual->red_mask != 0xf800))
 471             bpp = 15;
 472         else if (bpp < 8)
 473             bpp = 8;
 474
 475         // We handle 8-bit bitmaps ourselves using the colour cube, 12-bit
 476         // visuals are not supported by GDK so we do these ourselves, too.
 477         // 15-bit and 16-bit should actually work and 24-bit certainly does.
 478 #ifdef __sgi
 479         if (!image.HasMask() && (bpp > 16))
 480 #else
 481         if (!image.HasMask() && (bpp > 12))
 482 #endif
 483         {
 484             static bool s_hasInitialized = FALSE;
 485
 486             if (!s_hasInitialized)
 487             {
 488                 gdk_rgb_init();
 489                 s_hasInitialized = TRUE;
 490             }
 491
 492             GdkGC *gc = gdk_gc_new( GetPixmap() );
 493
 494             gdk_draw_rgb_image( GetPixmap(),
 495                                 gc,
 496                                 0, 0,
 497                                 width, height,
 498                                 GDK_RGB_DITHER_NONE,
 499                                 image.GetData(),
 500                                 width*3 );
 501
 502             gdk_gc_unref( gc );
 503             return TRUE;
 504         }
 505
 506         // Create picture image
 507
 508         GdkImage *data_image =
 509             gdk_image_new( GDK_IMAGE_FASTEST, visual, width, height );
 510
 511         // Create mask image
 512
 513         GdkImage *mask_image = (GdkImage*) NULL;
 514
 515         if (image.HasMask())
 516         {
 517             unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 518
 519             mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 520
 521             wxMask *mask = new wxMask();
 522             mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 523
 524             SetMask( mask );
 525         }
 526
 527         // Render
 528
 529         enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
 530         byte_order b_o = RGB;
 531
 532         if (bpp > 8)
 533         {
 534             if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
 535             else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RBG;
 536             else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
 537             else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
 538             else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
 539             else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
 540         }
 541
 542         int r_mask = image.GetMaskRed();
 543         int g_mask = image.GetMaskGreen();
 544         int b_mask = image.GetMaskBlue();
 545
 546         unsigned char* data = image.GetData();
 547
 548         int index = 0;
 549         for (int y = 0; y < height; y++)
 550         {
 551             for (int x = 0; x < width; x++)
 552             {
 553                 int r = data[index];
 554                 index++;
 555                 int g = data[index];
 556                 index++;
 557                 int b = data[index];
 558                 index++;
 559
 560                 if (image.HasMask())
 561                 {
 562                     if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 563                         gdk_image_put_pixel( mask_image, x, y, 1 );
 564                     else
 565                         gdk_image_put_pixel( mask_image, x, y, 0 );
 566                 }
 567
 568                 switch (bpp)
 569                 {
 570                     case 8:
 571                     {
 572                         int pixel = -1;
 573                         if (wxTheApp->m_colorCube)
 574                         {
 575                             pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
 576                         }
 577                         else
 578                         {
 579                             GdkColormap *cmap = gtk_widget_get_default_colormap();
 580                             GdkColor *colors = cmap->colors;
 581                             int max = 3 * (65536);
 582
 583                             for (int i = 0; i < cmap->size; i++)
 584                             {
 585                                 int rdiff = (r << 8) - colors[i].red;
 586                                 int gdiff = (g << 8) - colors[i].green;
 587                                 int bdiff = (b << 8) - colors[i].blue;
 588                                 int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 589                                 if (sum < max) { pixel = i; max = sum; }
 590                             }
 591                         }
 592
 593                         gdk_image_put_pixel( data_image, x, y, pixel );
 594
 595                         break;
 596                     }
 597                     case 12:  // SGI only
 598                     {
 599                         guint32 pixel = 0;
 600                         switch (b_o)
 601                         {
 602                             case RGB: pixel = ((r & 0xf0) << 4) | (g & 0xf0) | ((b & 0xf0) >> 4); break;
 603                             case RBG: pixel = ((r & 0xf0) << 4) | (b & 0xf0) | ((g & 0xf0) >> 4); break;
 604                             case GRB: pixel = ((g & 0xf0) << 4) | (r & 0xf0) | ((b & 0xf0) >> 4); break;
 605                             case GBR: pixel = ((g & 0xf0) << 4) | (b & 0xf0) | ((r & 0xf0) >> 4); break;
 606                             case BRG: pixel = ((b & 0xf0) << 4) | (r & 0xf0) | ((g & 0xf0) >> 4); break;
 607                             case BGR: pixel = ((b & 0xf0) << 4) | (g & 0xf0) | ((r & 0xf0) >> 4); break;
 608                         }
 609                         gdk_image_put_pixel( data_image, x, y, pixel );
 610                         break;
 611                     }
 612                     case 15:
 613                     {
 614                         guint32 pixel = 0;
 615                         switch (b_o)
 616                         {
 617                             case RGB: pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 618                             case RBG: pixel = ((r & 0xf8) << 7) | ((b & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 619                             case GRB: pixel = ((g & 0xf8) << 7) | ((r & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 620                             case GBR: pixel = ((g & 0xf8) << 7) | ((b & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 621                             case BRG: pixel = ((b & 0xf8) << 7) | ((r & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 622                             case BGR: pixel = ((b & 0xf8) << 7) | ((g & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 623                         }
 624                         gdk_image_put_pixel( data_image, x, y, pixel );
 625                         break;
 626                     }
 627                     case 16:
 628                     {
 629                         // I actually don't know if for 16-bit displays, it is alway the green
 630                         // component or the second component which has 6 bits.
 631                         guint32 pixel = 0;
 632                         switch (b_o)
 633                         {
 634                             case RGB: pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 635                             case RBG: pixel = ((r & 0xf8) << 8) | ((b & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 636                             case GRB: pixel = ((g & 0xf8) << 8) | ((r & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 637                             case GBR: pixel = ((g & 0xf8) << 8) | ((b & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 638                             case BRG: pixel = ((b & 0xf8) << 8) | ((r & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 639                             case BGR: pixel = ((b & 0xf8) << 8) | ((g & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 640                         }
 641                         gdk_image_put_pixel( data_image, x, y, pixel );
 642                         break;
 643                     }
 644                     case 32:
 645                     case 24:
 646                     {
 647                         guint32 pixel = 0;
 648                         switch (b_o)
 649                         {
 650                             case RGB: pixel = (r << 16) | (g << 8) | b; break;
 651                             case RBG: pixel = (r << 16) | (b << 8) | g; break;
 652                             case BRG: pixel = (b << 16) | (r << 8) | g; break;
 653                             case BGR: pixel = (b << 16) | (g << 8) | r; break;
 654                             case GRB: pixel = (g << 16) | (r << 8) | b; break;
 655                             case GBR: pixel = (g << 16) | (b << 8) | r; break;
 656                         }
 657                         gdk_image_put_pixel( data_image, x, y, pixel );
 658                     }
 659                     default: break;
 660                 }
 661             } // for
 662         }  // for
 663
 664         // Blit picture
 665
 666         GdkGC *data_gc = gdk_gc_new( GetPixmap() );
 667
 668         gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 669
 670         gdk_image_destroy( data_image );
 671         gdk_gc_unref( data_gc );
 672
 673         // Blit mask
 674
 675         if (image.HasMask())
 676         {
 677             GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 678
 679             gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 680
 681             gdk_image_destroy( mask_image );
 682             gdk_gc_unref( mask_gc );
 683         }
 684     }
 685
 686     return TRUE;
 687 }
 688
 689 wxImage wxBitmap::ConvertToImage() const
 690 {
 691     // the colour used as transparent one in wxImage and the one it is replaced
 692     // with when it really occurs in the bitmap
 693     static const int MASK_RED = 1;
 694     static const int MASK_GREEN = 2;
 695     static const int MASK_BLUE = 3;
 696     static const int MASK_BLUE_REPLACEMENT = 2;
 697
 698     wxImage image;
 699
 700     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 701
 702     GdkImage *gdk_image = (GdkImage*) NULL;
 703     if (GetPixmap())
 704     {
 705         gdk_image = gdk_image_get( GetPixmap(),
 706                                    0, 0,
 707                                    GetWidth(), GetHeight() );
 708     }
 709     else if (GetBitmap())
 710     {
 711         gdk_image = gdk_image_get( GetBitmap(),
 712                                    0, 0,
 713                                    GetWidth(), GetHeight() );
 714     }
 715     else
 716     {
 717         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 718     }
 719
 720     wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
 721
 722     image.Create( GetWidth(), GetHeight() );
 723     char unsigned *data = image.GetData();
 724
 725     if (!data)
 726     {
 727         gdk_image_destroy( gdk_image );
 728         wxFAIL_MSG( wxT("couldn't create image") );
 729         return wxNullImage;
 730     }
 731
 732     GdkImage *gdk_image_mask = (GdkImage*) NULL;
 733     if (GetMask())
 734     {
 735         gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
 736                                         0, 0,
 737                                         GetWidth(), GetHeight() );
 738
 739         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
 740     }
 741
 742     int bpp = -1;
 743     int red_shift_right = 0;
 744     int green_shift_right = 0;
 745     int blue_shift_right = 0;
 746     int red_shift_left = 0;
 747     int green_shift_left = 0;
 748     int blue_shift_left = 0;
 749     bool use_shift = FALSE;
 750
 751     if (GetPixmap())
 752     {
 753         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 754         if (visual == NULL)
 755             visual = wxTheApp->GetGdkVisual();
 756
 757         bpp = visual->depth;
 758         if (bpp == 16)
 759             bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
 760         red_shift_right = visual->red_shift;
 761         red_shift_left = 8-visual->red_prec;
 762         green_shift_right = visual->green_shift;
 763         green_shift_left = 8-visual->green_prec;
 764         blue_shift_right = visual->blue_shift;
 765         blue_shift_left = 8-visual->blue_prec;
 766
 767         use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
 768     }
 769     if (GetBitmap())
 770     {
 771         bpp = 1;
 772     }
 773
 774
 775     GdkColormap *cmap = gtk_widget_get_default_colormap();
 776
 777     long pos = 0;
 778     for (int j = 0; j < GetHeight(); j++)
 779     {
 780         for (int i = 0; i < GetWidth(); i++)
 781         {
 782             wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
 783             if (bpp == 1)
 784             {
 785                 if (pixel == 0)
 786                 {
 787                     data[pos]   = 0;
 788                     data[pos+1] = 0;
 789                     data[pos+2] = 0;
 790                 }
 791                 else
 792                 {
 793                     data[pos]   = 255;
 794                     data[pos+1] = 255;
 795                     data[pos+2] = 255;
 796                 }
 797             }
 798             else if (use_shift)
 799             {
 800                 data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
 801                 data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
 802                 data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
 803             }
 804             else if (cmap->colors)
 805             {
 806                 data[pos] =   cmap->colors[pixel].red   >> 8;
 807                 data[pos+1] = cmap->colors[pixel].green >> 8;
 808                 data[pos+2] = cmap->colors[pixel].blue  >> 8;
 809             }
 810             else
 811             {
 812                 wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
 813             }
 814
 815             if (gdk_image_mask)
 816             {
 817                 int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
 818                 if (mask_pixel == 0)
 819                 {
 820                     data[pos] = MASK_RED;
 821                     data[pos+1] = MASK_GREEN;
 822                     data[pos+2] = MASK_BLUE;
 823                 }
 824                 else if ( data[pos] == MASK_RED &&
 825                             data[pos+1] == MASK_GREEN &&
 826                                 data[pos+2] == MASK_BLUE )
 827                 {
 828                     data[pos+2] = MASK_BLUE_REPLACEMENT;
 829                 }
 830             }
 831
 832             pos += 3;
 833         }
 834     }
 835
 836     gdk_image_destroy( gdk_image );
 837     if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
 838
 839     return image;
 840 }
 841
 842 wxBitmap::wxBitmap( const wxBitmap& bmp )
 843         : wxGDIObject()
 844 {
 845     Ref( bmp );
 846 }
 847
 848 wxBitmap::wxBitmap( const wxString &filename, int type )
 849 {
 850     LoadFile( filename, type );
 851 }
 852
 853 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
 854 {
 855     if ( width > 0 && height > 0 )
 856     {
 857         m_refData = new wxBitmapRefData();
 858
 859         M_BMPDATA->m_mask = (wxMask *) NULL;
 860         M_BMPDATA->m_bitmap = gdk_bitmap_create_from_data
 861                               (
 862                                 wxGetRootWindow()->window,
 863                                 (gchar *) bits,
 864                                 width,
 865                                 height
 866                               );
 867         M_BMPDATA->m_width = width;
 868         M_BMPDATA->m_height = height;
 869         M_BMPDATA->m_bpp = 1;
 870
 871         wxASSERT_MSG( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
 872     }
 873 }
 874
 875 wxBitmap::~wxBitmap()
 876 {
 877 }
 878
 879 wxBitmap& wxBitmap::operator = ( const wxBitmap& bmp )
 880 {
 881     if ( m_refData != bmp.m_refData )
 882         Ref( bmp );
 883
 884     return *this;
 885 }
 886
 887 bool wxBitmap::operator == ( const wxBitmap& bmp ) const
 888 {
 889     return m_refData == bmp.m_refData;
 890 }
 891
 892 bool wxBitmap::operator != ( const wxBitmap& bmp ) const
 893 {
 894     return m_refData != bmp.m_refData;
 895 }
 896
 897 bool wxBitmap::Ok() const
 898 {
 899     return (m_refData != NULL);
 900 }
 901
 902 int wxBitmap::GetHeight() const
 903 {
 904     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 905
 906     return M_BMPDATA->m_height;
 907 }
 908
 909 int wxBitmap::GetWidth() const
 910 {
 911     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 912
 913     return M_BMPDATA->m_width;
 914 }
 915
 916 int wxBitmap::GetDepth() const
 917 {
 918     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 919
 920     return M_BMPDATA->m_bpp;
 921 }
 922
 923 wxMask *wxBitmap::GetMask() const
 924 {
 925     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 926
 927     return M_BMPDATA->m_mask;
 928 }
 929
 930 void wxBitmap::SetMask( wxMask *mask )
 931 {
 932     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 933
 934     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
 935
 936     M_BMPDATA->m_mask = mask;
 937 }
 938
 939 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 940 {
 941     *this = icon;
 942     return TRUE;
 943 }
 944
 945 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 946 {
 947     wxCHECK_MSG( Ok() &&
 948                  (rect.x >= 0) && (rect.y >= 0) &&
 949                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
 950                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
 951
 952     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
 953     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 954
 955     if (ret.GetPixmap())
 956     {
 957         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
 958         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 959         gdk_gc_destroy( gc );
 960     }
 961     else
 962     {
 963         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
 964         gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 965         gdk_gc_destroy( gc );
 966     }
 967
 968     if (GetMask())
 969     {
 970         wxMask *mask = new wxMask;
 971         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 972
 973         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
 974         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, 0, 0, rect.x, rect.y, rect.width, rect.height );
 975         gdk_gc_destroy( gc );
 976
 977         ret.SetMask( mask );
 978     }
 979
 980     return ret;
 981 }
 982
 983 bool wxBitmap::SaveFile( const wxString &name, int type, wxPalette *WXUNUSED(palette) )
 984 {
 985     wxCHECK_MSG( Ok(), FALSE, wxT("invalid bitmap") );
 986
 987     // Try to save the bitmap via wxImage handlers:
 988     {
 989         wxImage image = ConvertToImage();
 990         if (image.Ok()) return image.SaveFile( name, type );
 991     }
 992
 993     return FALSE;
 994 }
 995
 996 bool wxBitmap::LoadFile( const wxString &name, int type )
 997 {
 998     UnRef();
 999
1000     if (!wxFileExists(name))
1001         return FALSE;
1002
1003     GdkVisual *visual = wxTheApp->GetGdkVisual();
1004
1005     if (type == wxBITMAP_TYPE_XPM)
1006     {
1007         m_refData = new wxBitmapRefData();
1008
1009         GdkBitmap *mask = (GdkBitmap*) NULL;
1010
1011         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
1012                               (
1013                                 wxGetRootWindow()->window,
1014                                 &mask,
1015                                 NULL,
1016                                 name.fn_str()
1017                               );
1018
1019         if (mask)
1020         {
1021            M_BMPDATA->m_mask = new wxMask();
1022            M_BMPDATA->m_mask->m_bitmap = mask;
1023         }
1024
1025         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
1026
1027         M_BMPDATA->m_bpp = visual->depth;
1028     }
1029     else // try if wxImage can load it
1030     {
1031         wxImage image;
1032         if ( !image.LoadFile( name, type ) || !image.Ok() )
1033             return FALSE;
1034
1035         *this = wxBitmap(image);
1036     }
1037
1038     return TRUE;
1039 }
1040
1041 wxPalette *wxBitmap::GetPalette() const
1042 {
1043     if (!Ok())
1044         return (wxPalette *) NULL;
1045
1046     return M_BMPDATA->m_palette;
1047 }
1048
1049 void wxBitmap::SetHeight( int height )
1050 {
1051     if (!m_refData)
1052         m_refData = new wxBitmapRefData();
1053
1054     M_BMPDATA->m_height = height;
1055 }
1056
1057 void wxBitmap::SetWidth( int width )
1058 {
1059     if (!m_refData)
1060         m_refData = new wxBitmapRefData();
1061
1062     M_BMPDATA->m_width = width;
1063 }
1064
1065 void wxBitmap::SetDepth( int depth )
1066 {
1067     if (!m_refData)
1068         m_refData = new wxBitmapRefData();
1069
1070     M_BMPDATA->m_bpp = depth;
1071 }
1072
1073 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1074 {
1075     if (!m_refData)
1076         m_refData = new wxBitmapRefData();
1077
1078     M_BMPDATA->m_pixmap = pixmap;
1079 }
1080
1081 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
1082 {
1083     if (!m_refData)
1084         m_refData = new wxBitmapRefData();
1085
1086     M_BMPDATA->m_bitmap = bitmap;
1087 }
1088
1089 GdkPixmap *wxBitmap::GetPixmap() const
1090 {
1091     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
1092
1093     return M_BMPDATA->m_pixmap;
1094 }
1095
1096 GdkBitmap *wxBitmap::GetBitmap() const
1097 {
1098     wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, wxT("invalid bitmap") );
1099
1100     return M_BMPDATA->m_bitmap;
1101 }