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