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