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