src/gtk/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        bitmap.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "bitmap.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/defs.h"
  18
  19 #include "wx/palette.h"
  20 #include "wx/bitmap.h"
  21 #include "wx/icon.h"
  22 #include "wx/filefn.h"
  23 #include "wx/image.h"
  24 #include "wx/dcmemory.h"
  25 #include "wx/app.h"
  26
  27 #ifdef __WXGTK20__
  28     // need this to get gdk_image_new_bitmap()
  29     #define GDK_ENABLE_BROKEN
  30 #endif
  31
  32 #include <gdk/gdk.h>
  33 #include <gtk/gtk.h>
  34 #include <gdk/gdkx.h>
  35
  36 #ifdef __WXGTK20__
  37     #include <gdk/gdkimage.h>
  38 #else // GTK+ 1.2
  39     #include <gdk/gdkrgb.h>
  40 #endif // GTK+ 2.0/1.2
  41
  42 #include <math.h>
  43
  44 extern void gdk_wx_draw_bitmap     (GdkDrawable  *drawable,
  45                           GdkGC               *gc,
  46                           GdkDrawable  *src,
  47                           gint                xsrc,
  48                           gint                ysrc,
  49                           gint                xdest,
  50                           gint                ydest,
  51                           gint                width,
  52                           gint                height);
  53
  54 //-----------------------------------------------------------------------------
  55 // data
  56 //-----------------------------------------------------------------------------
  57
  58 extern GtkWidget *wxGetRootWindow();
  59
  60 //-----------------------------------------------------------------------------
  61 // wxMask
  62 //-----------------------------------------------------------------------------
  63
  64 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  65
  66 wxMask::wxMask()
  67 {
  68     m_bitmap = (GdkBitmap *) NULL;
  69 }
  70
  71 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  72 {
  73     m_bitmap = (GdkBitmap *) NULL;
  74     Create( bitmap, colour );
  75 }
  76
  77 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  78 {
  79     m_bitmap = (GdkBitmap *) NULL;
  80     Create( bitmap, paletteIndex );
  81 }
  82
  83 wxMask::wxMask( const wxBitmap& bitmap )
  84 {
  85     m_bitmap = (GdkBitmap *) NULL;
  86     Create( bitmap );
  87 }
  88
  89 wxMask::~wxMask()
  90 {
  91     if (m_bitmap)
  92         gdk_bitmap_unref( m_bitmap );
  93 }
  94
  95 bool wxMask::Create( const wxBitmap& bitmap,
  96                      const wxColour& colour )
  97 {
  98     if (m_bitmap)
  99     {
 100         gdk_bitmap_unref( m_bitmap );
 101         m_bitmap = (GdkBitmap*) NULL;
 102     }
 103
 104     wxImage image = bitmap.ConvertToImage();
 105     if (!image.Ok()) return FALSE;
 106
 107     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, image.GetWidth(), image.GetHeight(), 1 );
 108     GdkGC *gc = gdk_gc_new( m_bitmap );
 109
 110     GdkColor color;
 111     color.red = 65000;
 112     color.green = 65000;
 113     color.blue = 65000;
 114     color.pixel = 1;
 115     gdk_gc_set_foreground( gc, &color );
 116     gdk_gc_set_fill( gc, GDK_SOLID );
 117     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
 118
 119     unsigned char *data = image.GetData();
 120     int index = 0;
 121
 122     unsigned char red = colour.Red();
 123     unsigned char green = colour.Green();
 124     unsigned char blue = colour.Blue();
 125
 126     GdkVisual *visual = wxTheApp->GetGdkVisual();
 127
 128     int bpp = visual->depth;
 129     if ((bpp == 16) && (visual->red_mask != 0xf800))
 130         bpp = 15;
 131     if (bpp == 15)
 132     {
 133         red = red & 0xf8;
 134         green = green & 0xf8;
 135         blue = blue & 0xf8;
 136     }
 137     else if (bpp == 16)
 138     {
 139         red = red & 0xf8;
 140         green = green & 0xfc;
 141         blue = blue & 0xf8;
 142     }
 143     else if (bpp == 12)
 144     {
 145         red = red & 0xf0;
 146         green = green & 0xf0;
 147         blue = blue & 0xf0;
 148     }
 149
 150     color.red = 0;
 151     color.green = 0;
 152     color.blue = 0;
 153     color.pixel = 0;
 154     gdk_gc_set_foreground( gc, &color );
 155
 156     for (int j = 0; j < image.GetHeight(); j++)
 157     {
 158         int start_x = -1;
 159         int i;
 160         for (i = 0; i < image.GetWidth(); i++)
 161         {
 162             if ((data[index] == red) &&
 163                 (data[index+1] == green) &&
 164                 (data[index+2] == blue))
 165             {
 166                 if (start_x == -1)
 167                 start_x = i;
 168             }
 169             else
 170             {
 171                 if (start_x != -1)
 172                 {
 173                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 174                     start_x = -1;
 175                 }
 176             }
 177             index += 3;
 178         }
 179         if (start_x != -1)
 180             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 181     }
 182
 183     gdk_gc_unref( gc );
 184
 185     return TRUE;
 186 }
 187
 188 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 189 {
 190     unsigned char r,g,b;
 191     wxPalette *pal = bitmap.GetPalette();
 192
 193     wxCHECK_MSG( pal, FALSE, wxT("Cannot create mask from bitmap without palette") );
 194
 195     pal->GetRGB(paletteIndex, &r, &g, &b);
 196
 197     return Create(bitmap, wxColour(r, g, b));
 198 }
 199
 200 bool wxMask::Create( const wxBitmap& bitmap )
 201 {
 202     if (m_bitmap)
 203     {
 204         gdk_bitmap_unref( m_bitmap );
 205         m_bitmap = (GdkBitmap*) NULL;
 206     }
 207
 208     if (!bitmap.Ok()) return FALSE;
 209
 210     wxCHECK_MSG( bitmap.GetBitmap(), FALSE, wxT("Cannot create mask from colour bitmap") );
 211
 212     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 213
 214     if (!m_bitmap) return FALSE;
 215
 216     GdkGC *gc = gdk_gc_new( m_bitmap );
 217
 218     gdk_wx_draw_bitmap( m_bitmap, gc, bitmap.GetBitmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
 219
 220     gdk_gc_unref( gc );
 221
 222     return TRUE;
 223 }
 224
 225 GdkBitmap *wxMask::GetBitmap() const
 226 {
 227     return m_bitmap;
 228 }
 229
 230 //-----------------------------------------------------------------------------
 231 // wxBitmap
 232 //-----------------------------------------------------------------------------
 233
 234 class wxBitmapRefData: public wxObjectRefData
 235 {
 236 public:
 237     wxBitmapRefData();
 238     ~wxBitmapRefData();
 239
 240     GdkPixmap      *m_pixmap;
 241     GdkBitmap      *m_bitmap;
 242     wxMask         *m_mask;
 243     int             m_width;
 244     int             m_height;
 245     int             m_bpp;
 246     wxPalette      *m_palette;
 247 };
 248
 249 wxBitmapRefData::wxBitmapRefData()
 250 {
 251     m_pixmap = (GdkPixmap *) NULL;
 252     m_bitmap = (GdkBitmap *) NULL;
 253     m_mask = (wxMask *) NULL;
 254     m_width = 0;
 255     m_height = 0;
 256     m_bpp = 0;
 257     m_palette = (wxPalette *) NULL;
 258 }
 259
 260 wxBitmapRefData::~wxBitmapRefData()
 261 {
 262     if (m_pixmap)
 263         gdk_pixmap_unref( m_pixmap );
 264     if (m_bitmap)
 265         gdk_bitmap_unref( m_bitmap );
 266     delete m_mask;
 267     delete m_palette;
 268 }
 269
 270 //-----------------------------------------------------------------------------
 271
 272 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 273
 274 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 275
 276 wxBitmap::wxBitmap()
 277 {
 278 }
 279
 280 wxBitmap::wxBitmap( int width, int height, int depth )
 281 {
 282     Create( width, height, depth );
 283 }
 284
 285 bool wxBitmap::Create( int width, int height, int depth )
 286 {
 287     UnRef();
 288
 289     if ( width <= 0 || height <= 0 )
 290     {
 291         return false;
 292     }
 293
 294     GdkVisual *visual = wxTheApp->GetGdkVisual();
 295
 296     if (depth == -1)
 297         depth = visual->depth;
 298
 299     wxCHECK_MSG( (depth == visual->depth) || (depth == 1), FALSE,
 300                     wxT("invalid bitmap depth") )
 301
 302     m_refData = new wxBitmapRefData();
 303     M_BMPDATA->m_mask = (wxMask *) NULL;
 304     M_BMPDATA->m_width = width;
 305     M_BMPDATA->m_height = height;
 306     if (depth == 1)
 307     {
 308         M_BMPDATA->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 309         M_BMPDATA->m_bpp = 1;
 310     }
 311     else
 312     {
 313         M_BMPDATA->m_pixmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, depth );
 314         M_BMPDATA->m_bpp = visual->depth;
 315     }
 316
 317     return Ok();
 318 }
 319
 320 bool wxBitmap::CreateFromXpm( const char **bits )
 321 {
 322     UnRef();
 323
 324     wxCHECK_MSG( bits != NULL, FALSE, wxT("invalid bitmap data") )
 325
 326     GdkVisual *visual = wxTheApp->GetGdkVisual();
 327
 328     m_refData = new wxBitmapRefData();
 329
 330     GdkBitmap *mask = (GdkBitmap*) NULL;
 331
 332     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxGetRootWindow()->window, &mask, NULL, (gchar **) bits );
 333
 334     wxCHECK_MSG( M_BMPDATA->m_pixmap, FALSE, wxT("couldn't create pixmap") );
 335
 336     if (mask)
 337     {
 338         M_BMPDATA->m_mask = new wxMask();
 339         M_BMPDATA->m_mask->m_bitmap = mask;
 340     }
 341
 342     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 343
 344     M_BMPDATA->m_bpp = visual->depth;  // Can we get a different depth from create_from_xpm_d() ?
 345
 346     return TRUE;
 347 }
 348
 349 wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
 350 {
 351     wxCHECK_MSG( Ok(), wxNullBitmap, wxT("invalid bitmap") );
 352
 353     if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 354         return *this;
 355
 356     GdkImage *img = (GdkImage*) NULL;
 357     if (GetPixmap())
 358         img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
 359     else if (GetBitmap())
 360         img = gdk_image_get( GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 361     else
 362         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 363
 364     wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
 365
 366     wxBitmap bmp;
 367     int bpp = -1;
 368
 369     int width = wxMax(newx, 1);
 370     int height = wxMax(newy, 1);
 371     width = wxMin(width, clipwidth);
 372     height = wxMin(height, clipheight);
 373
 374     GdkGC *gc = NULL;
 375     GdkPixmap *dstpix = NULL;
 376     if (GetPixmap())
 377     {
 378         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 379         if (visual == NULL)
 380             visual = wxTheApp->GetGdkVisual();
 381
 382         bpp = visual->depth;
 383         bmp = wxBitmap(width,height,bpp);
 384         dstpix = bmp.GetPixmap();
 385         gc = gdk_gc_new( dstpix );
 386     }
 387
 388     char *dst = NULL;
 389     long dstbyteperline = 0;
 390
 391     if (GetBitmap())
 392     {
 393         bpp = 1;
 394         dstbyteperline = width/8*M_BMPDATA->m_bpp;
 395         if (width*M_BMPDATA->m_bpp % 8 != 0)
 396             dstbyteperline++;
 397         dst = (char*) malloc(dstbyteperline*height);
 398     }
 399
 400     // be careful to use the right scaling factor
 401     float scx = (float)M_BMPDATA->m_width/(float)newx;
 402     float scy = (float)M_BMPDATA->m_height/(float)newy;
 403     // prepare accel-tables
 404     int *tablex = (int *)calloc(width,sizeof(int));
 405     int *tabley = (int *)calloc(height,sizeof(int));
 406
 407     // accel table filled with clipped values
 408     for (int x = 0; x < width; x++)
 409         tablex[x] = (int) (scx * (x+clipx));
 410     for (int y = 0; y < height; y++)
 411         tabley[y] = (int) (scy * (y+clipy));
 412
 413     // Main rescaling routine starts here
 414     for (int h = 0; h < height; h++)
 415     {
 416         char outbyte = 0;
 417         int old_x = -1;
 418         guint32 old_pixval;
 419
 420         for (int w = 0; w < width; w++)
 421         {
 422             guint32 pixval;
 423             int x = tablex[w];
 424             if (x == old_x)
 425                 pixval = old_pixval;
 426             else
 427             {
 428                 pixval = gdk_image_get_pixel( img, x, tabley[h] );
 429                 old_pixval = pixval;
 430                 old_x = x;
 431             }
 432
 433             if (bpp == 1)
 434             {
 435                 if (!pixval)
 436                 {
 437                     char bit=1;
 438                     char shift = bit << w % 8;
 439                     outbyte |= shift;
 440                 }
 441
 442                 if ((w+1)%8==0)
 443                 {
 444                     dst[h*dstbyteperline+w/8] = outbyte;
 445                     outbyte = 0;
 446                 }
 447             }
 448             else
 449             {
 450                 GdkColor col;
 451                 col.pixel = pixval;
 452                 gdk_gc_set_foreground( gc, &col );
 453                 gdk_draw_point( dstpix, gc, w, h);
 454             }
 455         }
 456
 457         // do not forget the last byte
 458         if ((bpp == 1) && (width % 8 != 0))
 459             dst[h*dstbyteperline+width/8] = outbyte;
 460     }
 461
 462     gdk_image_destroy( img );
 463     if (gc) gdk_gc_unref( gc );
 464
 465     if (bpp == 1)
 466     {
 467         bmp = wxBitmap( (const char *)dst, width, height, 1 );
 468         free( dst );
 469     }
 470
 471     if (GetMask())
 472     {
 473         dstbyteperline = width/8;
 474         if (width % 8 != 0)
 475             dstbyteperline++;
 476         dst = (char*) malloc(dstbyteperline*height);
 477         img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 478
 479         for (int h = 0; h < height; h++)
 480         {
 481             char outbyte = 0;
 482             int old_x = -1;
 483             guint32 old_pixval;
 484
 485             for (int w = 0; w < width; w++)
 486             {
 487                 guint32 pixval;
 488                 int x = tablex[w];
 489                 if (x == old_x)
 490                     pixval = old_pixval;
 491                 else
 492                 {
 493                     pixval = gdk_image_get_pixel( img, x, tabley[h] );
 494                     old_pixval = pixval;
 495                     old_x = x;
 496                 }
 497
 498                 if (pixval)
 499                 {
 500                     char bit=1;
 501                     char shift = bit << w % 8;
 502                     outbyte |= shift;
 503                 }
 504
 505                 if ((w+1)%8 == 0)
 506                 {
 507                     dst[h*dstbyteperline+w/8] = outbyte;
 508                     outbyte = 0;
 509                 }
 510             }
 511
 512             // do not forget the last byte
 513             if (width % 8 != 0)
 514                 dst[h*dstbyteperline+width/8] = outbyte;
 515         }
 516         wxMask* mask = new wxMask;
 517         mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
 518         bmp.SetMask(mask);
 519
 520         free( dst );
 521         gdk_image_destroy( img );
 522     }
 523
 524     free( tablex );
 525     free( tabley );
 526
 527     return bmp;
 528 }
 529
 530 bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
 531 {
 532     UnRef();
 533
 534     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
 535     wxCHECK_MSG( depth == -1 || depth == 1, FALSE, wxT("invalid bitmap depth") )
 536
 537     int width = image.GetWidth();
 538     int height = image.GetHeight();
 539
 540     if ( width <= 0 || height <= 0 )
 541     {
 542         return false;
 543     }
 544
 545     m_refData = new wxBitmapRefData();
 546
 547     SetHeight( height );
 548     SetWidth( width );
 549
 550     // ------
 551     // conversion to mono bitmap:
 552     // ------
 553     if (depth == 1)
 554     {
 555         SetBitmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 556
 557         SetDepth( 1 );
 558
 559         GdkVisual *visual = wxTheApp->GetGdkVisual();
 560
 561         // Create picture image
 562
 563         unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 564
 565         GdkImage *data_image =
 566             gdk_image_new_bitmap( visual, data_data, width, height );
 567
 568         // Create mask image
 569
 570         GdkImage *mask_image = (GdkImage*) NULL;
 571
 572         if (image.HasMask())
 573         {
 574             unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 575
 576             mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 577
 578             wxMask *mask = new wxMask();
 579             mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 580
 581             SetMask( mask );
 582         }
 583
 584         int r_mask = image.GetMaskRed();
 585         int g_mask = image.GetMaskGreen();
 586         int b_mask = image.GetMaskBlue();
 587
 588         unsigned char* data = image.GetData();
 589
 590         int index = 0;
 591         for (int y = 0; y < height; y++)
 592         {
 593             for (int x = 0; x < width; x++)
 594             {
 595                 int r = data[index];
 596                 index++;
 597                 int g = data[index];
 598                 index++;
 599                 int b = data[index];
 600                 index++;
 601
 602                 if (image.HasMask())
 603                 {
 604                     if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 605                         gdk_image_put_pixel( mask_image, x, y, 1 );
 606                     else
 607                         gdk_image_put_pixel( mask_image, x, y, 0 );
 608                 }
 609
 610                 if ((r == 255) && (b == 255) && (g == 255))
 611                     gdk_image_put_pixel( data_image, x, y, 1 );
 612                 else
 613                     gdk_image_put_pixel( data_image, x, y, 0 );
 614
 615             } // for
 616         }  // for
 617
 618         // Blit picture
 619
 620         GdkGC *data_gc = gdk_gc_new( GetBitmap() );
 621
 622         gdk_draw_image( GetBitmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 623
 624         gdk_image_destroy( data_image );
 625         gdk_gc_unref( data_gc );
 626
 627         // Blit mask
 628
 629         if (image.HasMask())
 630         {
 631             GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 632
 633             gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 634
 635             gdk_image_destroy( mask_image );
 636             gdk_gc_unref( mask_gc );
 637         }
 638     }
 639
 640     // ------
 641     // conversion to colour bitmap:
 642     // ------
 643     else
 644     {
 645         SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 646
 647         GdkVisual *visual = wxTheApp->GetGdkVisual();
 648
 649         int bpp = visual->depth;
 650
 651         SetDepth( bpp );
 652
 653         if ((bpp == 16) && (visual->red_mask != 0xf800))
 654             bpp = 15;
 655         else if (bpp < 8)
 656             bpp = 8;
 657
 658         // We handle 8-bit bitmaps ourselves using the colour cube, 12-bit
 659         // visuals are not supported by GDK so we do these ourselves, too.
 660         // 15-bit and 16-bit should actually work and 24-bit certainly does.
 661 #ifdef __sgi
 662         if (!image.HasMask() && (bpp > 16))
 663 #else
 664         if (!image.HasMask() && (bpp > 12))
 665 #endif
 666         {
 667             static bool s_hasInitialized = FALSE;
 668
 669             if (!s_hasInitialized)
 670             {
 671                 gdk_rgb_init();
 672                 s_hasInitialized = TRUE;
 673             }
 674
 675             GdkGC *gc = gdk_gc_new( GetPixmap() );
 676
 677             gdk_draw_rgb_image( GetPixmap(),
 678                                 gc,
 679                                 0, 0,
 680                                 width, height,
 681                                 GDK_RGB_DITHER_NONE,
 682                                 image.GetData(),
 683                                 width*3 );
 684
 685             gdk_gc_unref( gc );
 686             return TRUE;
 687         }
 688
 689         // Create picture image
 690
 691         GdkImage *data_image =
 692             gdk_image_new( GDK_IMAGE_FASTEST, visual, width, height );
 693
 694         // Create mask image
 695
 696         GdkImage *mask_image = (GdkImage*) NULL;
 697
 698         if (image.HasMask())
 699         {
 700             unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 701
 702             mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 703
 704             wxMask *mask = new wxMask();
 705             mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 706
 707             SetMask( mask );
 708         }
 709
 710         // Render
 711
 712         enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
 713         byte_order b_o = RGB;
 714
 715         if (bpp > 8)
 716         {
 717             if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
 718             else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RBG;
 719             else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
 720             else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
 721             else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
 722             else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
 723         }
 724
 725         int r_mask = image.GetMaskRed();
 726         int g_mask = image.GetMaskGreen();
 727         int b_mask = image.GetMaskBlue();
 728
 729         unsigned char* data = image.GetData();
 730
 731         int index = 0;
 732         for (int y = 0; y < height; y++)
 733         {
 734             for (int x = 0; x < width; x++)
 735             {
 736                 int r = data[index];
 737                 index++;
 738                 int g = data[index];
 739                 index++;
 740                 int b = data[index];
 741                 index++;
 742
 743                 if (image.HasMask())
 744                 {
 745                     if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 746                         gdk_image_put_pixel( mask_image, x, y, 1 );
 747                     else
 748                         gdk_image_put_pixel( mask_image, x, y, 0 );
 749                 }
 750
 751                 switch (bpp)
 752                 {
 753                     case 8:
 754                     {
 755                         int pixel = -1;
 756                         if (wxTheApp->m_colorCube)
 757                         {
 758                             pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
 759                         }
 760                         else
 761                         {
 762                             GdkColormap *cmap = gtk_widget_get_default_colormap();
 763                             GdkColor *colors = cmap->colors;
 764                             int max = 3 * (65536);
 765
 766                             for (int i = 0; i < cmap->size; i++)
 767                             {
 768                                 int rdiff = (r << 8) - colors[i].red;
 769                                 int gdiff = (g << 8) - colors[i].green;
 770                                 int bdiff = (b << 8) - colors[i].blue;
 771                                 int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 772                                 if (sum < max) { pixel = i; max = sum; }
 773                             }
 774                         }
 775
 776                         gdk_image_put_pixel( data_image, x, y, pixel );
 777
 778                         break;
 779                     }
 780                     case 12:  // SGI only
 781                     {
 782                         guint32 pixel = 0;
 783                         switch (b_o)
 784                         {
 785                             case RGB: pixel = ((r & 0xf0) << 4) | (g & 0xf0) | ((b & 0xf0) >> 4); break;
 786                             case RBG: pixel = ((r & 0xf0) << 4) | (b & 0xf0) | ((g & 0xf0) >> 4); break;
 787                             case GRB: pixel = ((g & 0xf0) << 4) | (r & 0xf0) | ((b & 0xf0) >> 4); break;
 788                             case GBR: pixel = ((g & 0xf0) << 4) | (b & 0xf0) | ((r & 0xf0) >> 4); break;
 789                             case BRG: pixel = ((b & 0xf0) << 4) | (r & 0xf0) | ((g & 0xf0) >> 4); break;
 790                             case BGR: pixel = ((b & 0xf0) << 4) | (g & 0xf0) | ((r & 0xf0) >> 4); break;
 791                         }
 792                         gdk_image_put_pixel( data_image, x, y, pixel );
 793                         break;
 794                     }
 795                     case 15:
 796                     {
 797                         guint32 pixel = 0;
 798                         switch (b_o)
 799                         {
 800                             case RGB: pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 801                             case RBG: pixel = ((r & 0xf8) << 7) | ((b & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 802                             case GRB: pixel = ((g & 0xf8) << 7) | ((r & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 803                             case GBR: pixel = ((g & 0xf8) << 7) | ((b & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 804                             case BRG: pixel = ((b & 0xf8) << 7) | ((r & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 805                             case BGR: pixel = ((b & 0xf8) << 7) | ((g & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 806                         }
 807                         gdk_image_put_pixel( data_image, x, y, pixel );
 808                         break;
 809                     }
 810                     case 16:
 811                     {
 812                         // I actually don't know if for 16-bit displays, it is alway the green
 813                         // component or the second component which has 6 bits.
 814                         guint32 pixel = 0;
 815                         switch (b_o)
 816                         {
 817                             case RGB: pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 818                             case RBG: pixel = ((r & 0xf8) << 8) | ((b & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 819                             case GRB: pixel = ((g & 0xf8) << 8) | ((r & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 820                             case GBR: pixel = ((g & 0xf8) << 8) | ((b & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 821                             case BRG: pixel = ((b & 0xf8) << 8) | ((r & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 822                             case BGR: pixel = ((b & 0xf8) << 8) | ((g & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 823                         }
 824                         gdk_image_put_pixel( data_image, x, y, pixel );
 825                         break;
 826                     }
 827                     case 32:
 828                     case 24:
 829                     {
 830                         guint32 pixel = 0;
 831                         switch (b_o)
 832                         {
 833                             case RGB: pixel = (r << 16) | (g << 8) | b; break;
 834                             case RBG: pixel = (r << 16) | (b << 8) | g; break;
 835                             case BRG: pixel = (b << 16) | (r << 8) | g; break;
 836                             case BGR: pixel = (b << 16) | (g << 8) | r; break;
 837                             case GRB: pixel = (g << 16) | (r << 8) | b; break;
 838                             case GBR: pixel = (g << 16) | (b << 8) | r; break;
 839                         }
 840                         gdk_image_put_pixel( data_image, x, y, pixel );
 841                     }
 842                     default: break;
 843                 }
 844             } // for
 845         }  // for
 846
 847         // Blit picture
 848
 849         GdkGC *data_gc = gdk_gc_new( GetPixmap() );
 850
 851         gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 852
 853         gdk_image_destroy( data_image );
 854         gdk_gc_unref( data_gc );
 855
 856         // Blit mask
 857
 858         if (image.HasMask())
 859         {
 860             GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 861
 862             gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 863
 864             gdk_image_destroy( mask_image );
 865             gdk_gc_unref( mask_gc );
 866         }
 867     }
 868
 869     return TRUE;
 870 }
 871
 872 wxImage wxBitmap::ConvertToImage() const
 873 {
 874     // the colour used as transparent one in wxImage and the one it is replaced
 875     // with when it really occurs in the bitmap
 876     static const int MASK_RED = 1;
 877     static const int MASK_GREEN = 2;
 878     static const int MASK_BLUE = 3;
 879     static const int MASK_BLUE_REPLACEMENT = 2;
 880
 881     wxImage image;
 882
 883     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 884
 885     GdkImage *gdk_image = (GdkImage*) NULL;
 886     if (GetPixmap())
 887     {
 888         gdk_image = gdk_image_get( GetPixmap(),
 889                                    0, 0,
 890                                    GetWidth(), GetHeight() );
 891     }
 892     else if (GetBitmap())
 893     {
 894         gdk_image = gdk_image_get( GetBitmap(),
 895                                    0, 0,
 896                                    GetWidth(), GetHeight() );
 897     }
 898     else
 899     {
 900         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 901     }
 902
 903     wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
 904
 905     image.Create( GetWidth(), GetHeight() );
 906     char unsigned *data = image.GetData();
 907
 908     if (!data)
 909     {
 910         gdk_image_destroy( gdk_image );
 911         wxFAIL_MSG( wxT("couldn't create image") );
 912         return wxNullImage;
 913     }
 914
 915     GdkImage *gdk_image_mask = (GdkImage*) NULL;
 916     if (GetMask())
 917     {
 918         gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
 919                                         0, 0,
 920                                         GetWidth(), GetHeight() );
 921
 922         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
 923     }
 924
 925     int bpp = -1;
 926     int red_shift_right = 0;
 927     int green_shift_right = 0;
 928     int blue_shift_right = 0;
 929     int red_shift_left = 0;
 930     int green_shift_left = 0;
 931     int blue_shift_left = 0;
 932     bool use_shift = FALSE;
 933
 934     if (GetPixmap())
 935     {
 936         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 937         if (visual == NULL)
 938             visual = wxTheApp->GetGdkVisual();
 939
 940         bpp = visual->depth;
 941         if (bpp == 16)
 942             bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
 943         red_shift_right = visual->red_shift;
 944         red_shift_left = 8-visual->red_prec;
 945         green_shift_right = visual->green_shift;
 946         green_shift_left = 8-visual->green_prec;
 947         blue_shift_right = visual->blue_shift;
 948         blue_shift_left = 8-visual->blue_prec;
 949
 950         use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
 951     }
 952     if (GetBitmap())
 953     {
 954         bpp = 1;
 955     }
 956
 957
 958     GdkColormap *cmap = gtk_widget_get_default_colormap();
 959
 960     long pos = 0;
 961     for (int j = 0; j < GetHeight(); j++)
 962     {
 963         for (int i = 0; i < GetWidth(); i++)
 964         {
 965             wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
 966             if (bpp == 1)
 967             {
 968                 if (pixel == 0)
 969                 {
 970                     data[pos]   = 0;
 971                     data[pos+1] = 0;
 972                     data[pos+2] = 0;
 973                 }
 974                 else
 975                 {
 976                     data[pos]   = 255;
 977                     data[pos+1] = 255;
 978                     data[pos+2] = 255;
 979                 }
 980             }
 981             else if (use_shift)
 982             {
 983                 data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
 984                 data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
 985                 data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
 986             }
 987             else if (cmap->colors)
 988             {
 989                 data[pos] =   cmap->colors[pixel].red   >> 8;
 990                 data[pos+1] = cmap->colors[pixel].green >> 8;
 991                 data[pos+2] = cmap->colors[pixel].blue  >> 8;
 992             }
 993             else
 994             {
 995                 wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
 996             }
 997
 998             if (gdk_image_mask)
 999             {
1000                 int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
1001                 if (mask_pixel == 0)
1002                 {
1003                     data[pos] = MASK_RED;
1004                     data[pos+1] = MASK_GREEN;
1005                     data[pos+2] = MASK_BLUE;
1006                 }
1007                 else if ( data[pos] == MASK_RED &&
1008                             data[pos+1] == MASK_GREEN &&
1009                                 data[pos+2] == MASK_BLUE )
1010                 {
1011                     data[pos+2] = MASK_BLUE_REPLACEMENT;
1012                 }
1013             }
1014
1015             pos += 3;
1016         }
1017     }
1018
1019     gdk_image_destroy( gdk_image );
1020     if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
1021
1022     return image;
1023 }
1024
1025 wxBitmap::wxBitmap( const wxBitmap& bmp )
1026         : wxGDIObject()
1027 {
1028     Ref( bmp );
1029 }
1030
1031 wxBitmap::wxBitmap( const wxString &filename, int type )
1032 {
1033     LoadFile( filename, type );
1034 }
1035
1036 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
1037 {
1038     if ( width > 0 && height > 0 )
1039     {
1040         m_refData = new wxBitmapRefData();
1041
1042         M_BMPDATA->m_mask = (wxMask *) NULL;
1043         M_BMPDATA->m_bitmap = gdk_bitmap_create_from_data
1044                               (
1045                                 wxGetRootWindow()->window,
1046                                 (gchar *) bits,
1047                                 width,
1048                                 height
1049                               );
1050         M_BMPDATA->m_width = width;
1051         M_BMPDATA->m_height = height;
1052         M_BMPDATA->m_bpp = 1;
1053
1054         wxASSERT_MSG( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
1055     }
1056 }
1057
1058 wxBitmap::~wxBitmap()
1059 {
1060 }
1061
1062 wxBitmap& wxBitmap::operator = ( const wxBitmap& bmp )
1063 {
1064     if ( m_refData != bmp.m_refData )
1065         Ref( bmp );
1066
1067     return *this;
1068 }
1069
1070 bool wxBitmap::operator == ( const wxBitmap& bmp ) const
1071 {
1072     return m_refData == bmp.m_refData;
1073 }
1074
1075 bool wxBitmap::operator != ( const wxBitmap& bmp ) const
1076 {
1077     return m_refData != bmp.m_refData;
1078 }
1079
1080 bool wxBitmap::Ok() const
1081 {
1082     return (m_refData != NULL) && (M_BMPDATA->m_bitmap || M_BMPDATA->m_pixmap);
1083 }
1084
1085 int wxBitmap::GetHeight() const
1086 {
1087     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1088
1089     return M_BMPDATA->m_height;
1090 }
1091
1092 int wxBitmap::GetWidth() const
1093 {
1094     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1095
1096     return M_BMPDATA->m_width;
1097 }
1098
1099 int wxBitmap::GetDepth() const
1100 {
1101     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1102
1103     return M_BMPDATA->m_bpp;
1104 }
1105
1106 wxMask *wxBitmap::GetMask() const
1107 {
1108     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1109
1110     return M_BMPDATA->m_mask;
1111 }
1112
1113 void wxBitmap::SetMask( wxMask *mask )
1114 {
1115     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
1116
1117     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
1118
1119     M_BMPDATA->m_mask = mask;
1120 }
1121
1122 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
1123 {
1124     *this = icon;
1125     return TRUE;
1126 }
1127
1128 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1129 {
1130     wxCHECK_MSG( Ok() &&
1131                  (rect.x >= 0) && (rect.y >= 0) &&
1132                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
1133                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1134
1135     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
1136     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1137
1138     if (ret.GetPixmap())
1139     {
1140         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1141         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1142         gdk_gc_destroy( gc );
1143     }
1144     else
1145     {
1146         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
1147         GdkColor col;
1148         col.pixel = 0xFFFFFF;
1149         gdk_gc_set_foreground( gc, &col );
1150         col.pixel = 0;
1151         gdk_gc_set_background( gc, &col );
1152         gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1153         gdk_gc_destroy( gc );
1154     }
1155
1156     if (GetMask())
1157     {
1158         wxMask *mask = new wxMask;
1159         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
1160
1161         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
1162         GdkColor col;
1163         col.pixel = 0xFFFFFF;
1164         gdk_gc_set_foreground( gc, &col );
1165         col.pixel = 0;
1166         gdk_gc_set_background( gc, &col );
1167         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height );
1168         gdk_gc_destroy( gc );
1169
1170         ret.SetMask( mask );
1171     }
1172
1173     return ret;
1174 }
1175
1176 bool wxBitmap::SaveFile( const wxString &name, int type, wxPalette *WXUNUSED(palette) )
1177 {
1178     wxCHECK_MSG( Ok(), FALSE, wxT("invalid bitmap") );
1179
1180     // Try to save the bitmap via wxImage handlers:
1181     {
1182         wxImage image = ConvertToImage();
1183         if (image.Ok()) return image.SaveFile( name, type );
1184     }
1185
1186     return FALSE;
1187 }
1188
1189 bool wxBitmap::LoadFile( const wxString &name, int type )
1190 {
1191     UnRef();
1192
1193     if (!wxFileExists(name))
1194         return FALSE;
1195
1196     GdkVisual *visual = wxTheApp->GetGdkVisual();
1197
1198     if (type == wxBITMAP_TYPE_XPM)
1199     {
1200         m_refData = new wxBitmapRefData();
1201
1202         GdkBitmap *mask = (GdkBitmap*) NULL;
1203
1204         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
1205                               (
1206                                 wxGetRootWindow()->window,
1207                                 &mask,
1208                                 NULL,
1209                                 name.fn_str()
1210                               );
1211
1212         if (mask)
1213         {
1214            M_BMPDATA->m_mask = new wxMask();
1215            M_BMPDATA->m_mask->m_bitmap = mask;
1216         }
1217
1218         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
1219
1220         M_BMPDATA->m_bpp = visual->depth;
1221     }
1222     else // try if wxImage can load it
1223     {
1224         wxImage image;
1225         if ( !image.LoadFile( name, type ) || !image.Ok() )
1226             return FALSE;
1227
1228         *this = wxBitmap(image);
1229     }
1230
1231     return TRUE;
1232 }
1233
1234 wxPalette *wxBitmap::GetPalette() const
1235 {
1236     if (!Ok())
1237         return (wxPalette *) NULL;
1238
1239     return M_BMPDATA->m_palette;
1240 }
1241
1242 void wxBitmap::SetHeight( int height )
1243 {
1244     if (!m_refData)
1245         m_refData = new wxBitmapRefData();
1246
1247     M_BMPDATA->m_height = height;
1248 }
1249
1250 void wxBitmap::SetWidth( int width )
1251 {
1252     if (!m_refData)
1253         m_refData = new wxBitmapRefData();
1254
1255     M_BMPDATA->m_width = width;
1256 }
1257
1258 void wxBitmap::SetDepth( int depth )
1259 {
1260     if (!m_refData)
1261         m_refData = new wxBitmapRefData();
1262
1263     M_BMPDATA->m_bpp = depth;
1264 }
1265
1266 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1267 {
1268     if (!m_refData)
1269         m_refData = new wxBitmapRefData();
1270
1271     M_BMPDATA->m_pixmap = pixmap;
1272 }
1273
1274 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
1275 {
1276     if (!m_refData)
1277         m_refData = new wxBitmapRefData();
1278
1279     M_BMPDATA->m_bitmap = bitmap;
1280 }
1281
1282 GdkPixmap *wxBitmap::GetPixmap() const
1283 {
1284     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
1285
1286     return M_BMPDATA->m_pixmap;
1287 }
1288
1289 GdkBitmap *wxBitmap::GetBitmap() const
1290 {
1291     wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, wxT("invalid bitmap") );
1292
1293     return M_BMPDATA->m_bitmap;
1294 }