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