src/gtk1/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/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 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/bitmap.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/app.h"
  17     #include "wx/dcmemory.h"
  18     #include "wx/palette.h"
  19     #include "wx/icon.h"
  20     #include "wx/math.h"
  21     #include "wx/image.h"
  22 #endif // WX_PRECOMP
  23
  24 #include "wx/filefn.h"
  25
  26 #include <gdk/gdk.h>
  27 #include <gtk/gtk.h>
  28 #include <gdk/gdkx.h>
  29
  30 #include <gdk/gdkrgb.h>
  31
  32 extern
  33 void gdk_wx_draw_bitmap (GdkDrawable  *drawable,
  34                          GdkGC        *gc,
  35                          GdkDrawable  *src,
  36                          gint          xsrc,
  37                          gint          ysrc,
  38                          gint          xdest,
  39                          gint          ydest,
  40                          gint          width,
  41                          gint          height);
  42
  43 //-----------------------------------------------------------------------------
  44 // data
  45 //-----------------------------------------------------------------------------
  46
  47 extern GtkWidget *wxGetRootWindow();
  48
  49 //-----------------------------------------------------------------------------
  50 // wxMask
  51 //-----------------------------------------------------------------------------
  52
  53 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  54
  55 wxMask::wxMask()
  56 {
  57     m_bitmap = (GdkBitmap *) NULL;
  58 }
  59
  60 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  61 {
  62     m_bitmap = (GdkBitmap *) NULL;
  63     Create( bitmap, colour );
  64 }
  65
  66 #if wxUSE_PALETTE
  67 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  68 {
  69     m_bitmap = (GdkBitmap *) NULL;
  70     Create( bitmap, paletteIndex );
  71 }
  72 #endif // wxUSE_PALETTE
  73
  74 wxMask::wxMask( const wxBitmap& bitmap )
  75 {
  76     m_bitmap = (GdkBitmap *) NULL;
  77     Create( bitmap );
  78 }
  79
  80 wxMask::~wxMask()
  81 {
  82     if (m_bitmap)
  83         gdk_bitmap_unref( m_bitmap );
  84 }
  85
  86 bool wxMask::Create( const wxBitmap& bitmap,
  87                      const wxColour& colour )
  88 {
  89     if (m_bitmap)
  90     {
  91         gdk_bitmap_unref( m_bitmap );
  92         m_bitmap = (GdkBitmap*) NULL;
  93     }
  94
  95     wxImage image = bitmap.ConvertToImage();
  96     if (!image.Ok()) return false;
  97
  98     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, image.GetWidth(), image.GetHeight(), 1 );
  99     GdkGC *gc = gdk_gc_new( m_bitmap );
 100
 101     GdkColor color;
 102     color.red = 65000;
 103     color.green = 65000;
 104     color.blue = 65000;
 105     color.pixel = 1;
 106     gdk_gc_set_foreground( gc, &color );
 107     gdk_gc_set_fill( gc, GDK_SOLID );
 108     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
 109
 110     unsigned char *data = image.GetData();
 111     int index = 0;
 112
 113     unsigned char red = colour.Red();
 114     unsigned char green = colour.Green();
 115     unsigned char blue = colour.Blue();
 116
 117     GdkVisual *visual = wxTheApp->GetGdkVisual();
 118
 119     int bpp = visual->depth;
 120     if ((bpp == 16) && (visual->red_mask != 0xf800))
 121         bpp = 15;
 122     if (bpp == 15)
 123     {
 124         red = red & 0xf8;
 125         green = green & 0xf8;
 126         blue = blue & 0xf8;
 127     }
 128     else if (bpp == 16)
 129     {
 130         red = red & 0xf8;
 131         green = green & 0xfc;
 132         blue = blue & 0xf8;
 133     }
 134     else if (bpp == 12)
 135     {
 136         red = red & 0xf0;
 137         green = green & 0xf0;
 138         blue = blue & 0xf0;
 139     }
 140
 141     color.red = 0;
 142     color.green = 0;
 143     color.blue = 0;
 144     color.pixel = 0;
 145     gdk_gc_set_foreground( gc, &color );
 146
 147     for (int j = 0; j < image.GetHeight(); j++)
 148     {
 149         int start_x = -1;
 150         int i;
 151         for (i = 0; i < image.GetWidth(); i++)
 152         {
 153             if ((data[index] == red) &&
 154                 (data[index+1] == green) &&
 155                 (data[index+2] == blue))
 156             {
 157                 if (start_x == -1)
 158                 start_x = i;
 159             }
 160             else
 161             {
 162                 if (start_x != -1)
 163                 {
 164                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 165                     start_x = -1;
 166                 }
 167             }
 168             index += 3;
 169         }
 170         if (start_x != -1)
 171             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 172     }
 173
 174     gdk_gc_unref( gc );
 175
 176     return true;
 177 }
 178
 179 #if wxUSE_PALETTE
 180 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 181 {
 182     unsigned char r,g,b;
 183     wxPalette *pal = bitmap.GetPalette();
 184
 185     wxCHECK_MSG( pal, false, wxT("Cannot create mask from bitmap without palette") );
 186
 187     pal->GetRGB(paletteIndex, &r, &g, &b);
 188
 189     return Create(bitmap, wxColour(r, g, b));
 190 }
 191 #endif // wxUSE_PALETTE
 192
 193 bool wxMask::Create( const wxBitmap& bitmap )
 194 {
 195     if (m_bitmap)
 196     {
 197         gdk_bitmap_unref( m_bitmap );
 198         m_bitmap = (GdkBitmap*) NULL;
 199     }
 200
 201     if (!bitmap.Ok()) return false;
 202
 203     wxCHECK_MSG( bitmap.GetBitmap(), false, wxT("Cannot create mask from colour bitmap") );
 204
 205     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 206
 207     if (!m_bitmap) return false;
 208
 209     GdkGC *gc = gdk_gc_new( m_bitmap );
 210
 211     gdk_wx_draw_bitmap( m_bitmap, gc, bitmap.GetBitmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
 212
 213     gdk_gc_unref( gc );
 214
 215     return true;
 216 }
 217
 218 GdkBitmap *wxMask::GetBitmap() const
 219 {
 220     return m_bitmap;
 221 }
 222
 223 //-----------------------------------------------------------------------------
 224 // wxBitmap
 225 //-----------------------------------------------------------------------------
 226
 227 class wxBitmapRefData: public wxObjectRefData
 228 {
 229 public:
 230     wxBitmapRefData();
 231     ~wxBitmapRefData();
 232
 233     GdkPixmap      *m_pixmap;
 234     GdkBitmap      *m_bitmap;
 235     wxMask         *m_mask;
 236     int             m_width;
 237     int             m_height;
 238     int             m_bpp;
 239     wxPalette      *m_palette;
 240 };
 241
 242 wxBitmapRefData::wxBitmapRefData()
 243 {
 244     m_pixmap = (GdkPixmap *) NULL;
 245     m_bitmap = (GdkBitmap *) NULL;
 246     m_mask = (wxMask *) NULL;
 247     m_width = 0;
 248     m_height = 0;
 249     m_bpp = 0;
 250     m_palette = (wxPalette *) NULL;
 251 }
 252
 253 wxBitmapRefData::~wxBitmapRefData()
 254 {
 255     if (m_pixmap)
 256         gdk_pixmap_unref( m_pixmap );
 257     if (m_bitmap)
 258         gdk_bitmap_unref( m_bitmap );
 259     delete m_mask;
 260 #if wxUSE_PALETTE
 261     delete m_palette;
 262 #endif // wxUSE_PALETTE
 263 }
 264
 265 //-----------------------------------------------------------------------------
 266
 267 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 268
 269 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 270
 271 wxBitmap::wxBitmap()
 272 {
 273 }
 274
 275 wxBitmap::wxBitmap( int width, int height, int depth )
 276 {
 277     Create( width, height, depth );
 278 }
 279
 280 bool wxBitmap::Create( int width, int height, int depth )
 281 {
 282     UnRef();
 283
 284     if ( width <= 0 || height <= 0 )
 285     {
 286         return false;
 287     }
 288
 289     GdkVisual *visual = wxTheApp->GetGdkVisual();
 290
 291     if (depth == -1)
 292         depth = visual->depth;
 293
 294     wxCHECK_MSG( (depth == visual->depth) || (depth == 1) || (depth == 32), false,
 295                     wxT("invalid bitmap depth") );
 296
 297     m_refData = new wxBitmapRefData();
 298     M_BMPDATA->m_mask = (wxMask *) NULL;
 299     M_BMPDATA->m_width = width;
 300     M_BMPDATA->m_height = height;
 301     if (depth == 1)
 302     {
 303         M_BMPDATA->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 304         M_BMPDATA->m_bpp = 1;
 305     }
 306     else
 307     {
 308         M_BMPDATA->m_pixmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, depth );
 309         M_BMPDATA->m_bpp = visual->depth;
 310     }
 311
 312     return Ok();
 313 }
 314
 315 bool wxBitmap::CreateFromXpm( const char **bits )
 316 {
 317     UnRef();
 318
 319     wxCHECK_MSG( bits != NULL, false, wxT("invalid bitmap data") );
 320
 321     GdkVisual *visual = wxTheApp->GetGdkVisual();
 322
 323     m_refData = new wxBitmapRefData();
 324
 325     GdkBitmap *mask = (GdkBitmap*) NULL;
 326
 327     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxGetRootWindow()->window, &mask, NULL, (gchar **) bits );
 328
 329     wxCHECK_MSG( M_BMPDATA->m_pixmap, false, wxT("couldn't create pixmap") );
 330
 331     if (mask)
 332     {
 333         M_BMPDATA->m_mask = new wxMask();
 334         M_BMPDATA->m_mask->m_bitmap = mask;
 335     }
 336
 337     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 338
 339     M_BMPDATA->m_bpp = visual->depth;  // Can we get a different depth from create_from_xpm_d() ?
 340
 341     return true;
 342 }
 343
 344 wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
 345 {
 346     wxCHECK_MSG( Ok(), wxNullBitmap, wxT("invalid bitmap") );
 347
 348     if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 349         return *this;
 350
 351     int width = wxMax(newx, 1);
 352     int height = wxMax(newy, 1);
 353     width = wxMin(width, clipwidth);
 354     height = wxMin(height, clipheight);
 355
 356     wxBitmap bmp;
 357
 358     GdkImage *img = (GdkImage*) NULL;
 359     if (GetPixmap())
 360         img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
 361     else if (GetBitmap())
 362         img = gdk_image_get( GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 363     else
 364         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 365
 366     wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
 367
 368     int bpp = -1;
 369
 370
 371     GdkGC *gc = NULL;
 372     GdkPixmap *dstpix = NULL;
 373     if (GetPixmap())
 374     {
 375         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 376         if (visual == NULL)
 377             visual = wxTheApp->GetGdkVisual();
 378
 379         bpp = visual->depth;
 380         bmp = wxBitmap(width,height,bpp);
 381         dstpix = bmp.GetPixmap();
 382         gc = gdk_gc_new( dstpix );
 383     }
 384
 385     char *dst = NULL;
 386     long dstbyteperline = 0;
 387
 388     if (GetBitmap())
 389     {
 390         bpp = 1;
 391         dstbyteperline = width/8*M_BMPDATA->m_bpp;
 392         if (width*M_BMPDATA->m_bpp % 8 != 0)
 393             dstbyteperline++;
 394         dst = (char*) malloc(dstbyteperline*height);
 395     }
 396
 397     // be careful to use the right scaling factor
 398     float scx = (float)M_BMPDATA->m_width/(float)newx;
 399     float scy = (float)M_BMPDATA->m_height/(float)newy;
 400     // prepare accel-tables
 401     int *tablex = (int *)calloc(width,sizeof(int));
 402     int *tabley = (int *)calloc(height,sizeof(int));
 403
 404     // accel table filled with clipped values
 405     for (int x = 0; x < width; x++)
 406         tablex[x] = (int) (scx * (x+clipx));
 407     for (int y = 0; y < height; y++)
 408         tabley[y] = (int) (scy * (y+clipy));
 409
 410     // Main rescaling routine starts here
 411     for (int h = 0; h < height; h++)
 412     {
 413         char outbyte = 0;
 414         int old_x = -1;
 415         guint32 old_pixval = 0;
 416
 417         for (int w = 0; w < width; w++)
 418         {
 419             guint32 pixval;
 420             int x = tablex[w];
 421             if (x == old_x)
 422                 pixval = old_pixval;
 423             else
 424             {
 425                 pixval = gdk_image_get_pixel( img, x, tabley[h] );
 426                 old_pixval = pixval;
 427                 old_x = x;
 428             }
 429
 430             if (bpp == 1)
 431             {
 432                 if (!pixval)
 433                 {
 434                     char bit=1;
 435                     char shift = bit << (w % 8);
 436                     outbyte |= shift;
 437                 }
 438
 439                 if ((w+1)%8==0)
 440                 {
 441                     dst[h*dstbyteperline+w/8] = outbyte;
 442                     outbyte = 0;
 443                 }
 444             }
 445             else
 446             {
 447                 GdkColor col;
 448                 col.pixel = pixval;
 449                 gdk_gc_set_foreground( gc, &col );
 450                 gdk_draw_point( dstpix, gc, w, h);
 451             }
 452         }
 453
 454         // do not forget the last byte
 455         if ((bpp == 1) && (width % 8 != 0))
 456             dst[h*dstbyteperline+width/8] = outbyte;
 457     }
 458
 459     gdk_image_destroy( img );
 460     if (gc) gdk_gc_unref( gc );
 461
 462     if (bpp == 1)
 463     {
 464         bmp = wxBitmap( (const char *)dst, width, height, 1 );
 465         free( dst );
 466     }
 467
 468     if (GetMask())
 469     {
 470         dstbyteperline = width/8;
 471         if (width % 8 != 0)
 472             dstbyteperline++;
 473         dst = (char*) malloc(dstbyteperline*height);
 474         img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 475
 476         for (int h = 0; h < height; h++)
 477         {
 478             char outbyte = 0;
 479             int old_x = -1;
 480             guint32 old_pixval = 0;
 481
 482             for (int w = 0; w < width; w++)
 483             {
 484                 guint32 pixval;
 485                 int x = tablex[w];
 486                 if (x == old_x)
 487                     pixval = old_pixval;
 488                 else
 489                 {
 490                     pixval = gdk_image_get_pixel( img, x, tabley[h] );
 491                     old_pixval = pixval;
 492                     old_x = x;
 493                 }
 494
 495                 if (pixval)
 496                 {
 497                     char bit=1;
 498                     char shift = bit << (w % 8);
 499                     outbyte |= shift;
 500                 }
 501
 502                 if ((w+1)%8 == 0)
 503                 {
 504                     dst[h*dstbyteperline+w/8] = outbyte;
 505                     outbyte = 0;
 506                 }
 507             }
 508
 509             // do not forget the last byte
 510             if (width % 8 != 0)
 511                 dst[h*dstbyteperline+width/8] = outbyte;
 512         }
 513         wxMask* mask = new wxMask;
 514         mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
 515         bmp.SetMask(mask);
 516
 517         free( dst );
 518         gdk_image_destroy( img );
 519     }
 520
 521     free( tablex );
 522     free( tabley );
 523
 524     return bmp;
 525 }
 526
 527 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 528 {
 529     UnRef();
 530
 531     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 532     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 533
 534     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 535         return false;
 536
 537     m_refData = new wxBitmapRefData();
 538
 539     if (depth == 1)
 540     {
 541         return CreateFromImageAsBitmap(image);
 542     }
 543     else
 544     {
 545         return CreateFromImageAsPixmap(image);
 546     }
 547 }
 548
 549 // conversion to mono bitmap:
 550 bool wxBitmap::CreateFromImageAsBitmap(const wxImage& img)
 551 {
 552     // convert alpha channel to mask, if it is present:
 553     wxImage image(img);
 554     image.ConvertAlphaToMask();
 555
 556     int width = image.GetWidth();
 557     int height = image.GetHeight();
 558
 559     SetHeight( height );
 560     SetWidth( width );
 561
 562     SetBitmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 563
 564     SetDepth( 1 );
 565
 566     GdkVisual *visual = wxTheApp->GetGdkVisual();
 567
 568     // Create picture image
 569
 570     unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 571
 572     GdkImage *data_image =
 573         gdk_image_new_bitmap( visual, data_data, width, height );
 574
 575     // Create mask image
 576
 577     GdkImage *mask_image = (GdkImage*) NULL;
 578
 579     if (image.HasMask())
 580     {
 581         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 582
 583         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 584
 585         wxMask *mask = new wxMask();
 586         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 587
 588         SetMask( mask );
 589     }
 590
 591     int r_mask = image.GetMaskRed();
 592     int g_mask = image.GetMaskGreen();
 593     int b_mask = image.GetMaskBlue();
 594
 595     unsigned char* data = image.GetData();
 596
 597     int index = 0;
 598     for (int y = 0; y < height; y++)
 599     {
 600         for (int x = 0; x < width; x++)
 601         {
 602             int r = data[index];
 603             index++;
 604             int g = data[index];
 605             index++;
 606             int b = data[index];
 607             index++;
 608
 609             if (image.HasMask())
 610             {
 611                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 612                     gdk_image_put_pixel( mask_image, x, y, 1 );
 613                 else
 614                     gdk_image_put_pixel( mask_image, x, y, 0 );
 615             }
 616
 617             if ((r == 255) && (b == 255) && (g == 255))
 618                 gdk_image_put_pixel( data_image, x, y, 1 );
 619             else
 620                 gdk_image_put_pixel( data_image, x, y, 0 );
 621
 622         } // for
 623     }  // for
 624
 625     // Blit picture
 626
 627     GdkGC *data_gc = gdk_gc_new( GetBitmap() );
 628
 629     gdk_draw_image( GetBitmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 630
 631     gdk_image_destroy( data_image );
 632     gdk_gc_unref( data_gc );
 633
 634     // Blit mask
 635
 636     if (image.HasMask())
 637     {
 638         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 639
 640         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 641
 642         gdk_image_destroy( mask_image );
 643         gdk_gc_unref( mask_gc );
 644     }
 645
 646     return true;
 647 }
 648
 649 // conversion to colour bitmap:
 650 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& img)
 651 {
 652     // convert alpha channel to mask, if it is present:
 653     wxImage image(img);
 654     image.ConvertAlphaToMask();
 655
 656     int width = image.GetWidth();
 657     int height = image.GetHeight();
 658
 659     SetHeight( height );
 660     SetWidth( width );
 661
 662     SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 663
 664     GdkVisual *visual = wxTheApp->GetGdkVisual();
 665
 666     int bpp = visual->depth;
 667
 668     SetDepth( bpp );
 669
 670     if ((bpp == 16) && (visual->red_mask != 0xf800))
 671         bpp = 15;
 672     else if (bpp < 8)
 673         bpp = 8;
 674
 675     // We handle 8-bit bitmaps ourselves using the colour cube, 12-bit
 676     // visuals are not supported by GDK so we do these ourselves, too.
 677     // 15-bit and 16-bit should actually work and 24-bit certainly does.
 678 #ifdef __sgi
 679     if (!image.HasMask() && (bpp > 16))
 680 #else
 681     if (!image.HasMask() && (bpp > 12))
 682 #endif
 683     {
 684         static bool s_hasInitialized = false;
 685
 686         if (!s_hasInitialized)
 687         {
 688             gdk_rgb_init();
 689             s_hasInitialized = true;
 690         }
 691
 692         GdkGC *gc = gdk_gc_new( GetPixmap() );
 693
 694         gdk_draw_rgb_image( GetPixmap(),
 695                             gc,
 696                             0, 0,
 697                             width, height,
 698                             GDK_RGB_DITHER_NONE,
 699                             image.GetData(),
 700                             width*3 );
 701
 702         gdk_gc_unref( gc );
 703         return true;
 704     }
 705
 706     // Create picture image
 707
 708     GdkImage *data_image =
 709         gdk_image_new( GDK_IMAGE_FASTEST, visual, width, height );
 710
 711     // Create mask image
 712
 713     GdkImage *mask_image = (GdkImage*) NULL;
 714
 715     if (image.HasMask())
 716     {
 717         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 718
 719         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 720
 721         wxMask *mask = new wxMask();
 722         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 723
 724         SetMask( mask );
 725     }
 726
 727     // Render
 728
 729     enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
 730     byte_order b_o = RGB;
 731
 732     if (bpp > 8)
 733     {
 734         if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
 735         else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RBG;
 736         else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
 737         else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
 738         else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
 739         else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
 740     }
 741
 742     int r_mask = image.GetMaskRed();
 743     int g_mask = image.GetMaskGreen();
 744     int b_mask = image.GetMaskBlue();
 745
 746     unsigned char* data = image.GetData();
 747
 748     int index = 0;
 749     for (int y = 0; y < height; y++)
 750     {
 751         for (int x = 0; x < width; x++)
 752         {
 753             int r = data[index];
 754             index++;
 755             int g = data[index];
 756             index++;
 757             int b = data[index];
 758             index++;
 759
 760             if (image.HasMask())
 761             {
 762                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 763                     gdk_image_put_pixel( mask_image, x, y, 1 );
 764                 else
 765                     gdk_image_put_pixel( mask_image, x, y, 0 );
 766             }
 767
 768             switch (bpp)
 769             {
 770                 case 8:
 771                 {
 772                     int pixel = -1;
 773                     if (wxTheApp->m_colorCube)
 774                     {
 775                         pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
 776                     }
 777                     else
 778                     {
 779                         GdkColormap *cmap = gtk_widget_get_default_colormap();
 780                         GdkColor *colors = cmap->colors;
 781                         int max = 3 * (65536);
 782
 783                         for (int i = 0; i < cmap->size; i++)
 784                         {
 785                             int rdiff = (r << 8) - colors[i].red;
 786                             int gdiff = (g << 8) - colors[i].green;
 787                             int bdiff = (b << 8) - colors[i].blue;
 788                             int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 789                             if (sum < max) { pixel = i; max = sum; }
 790                         }
 791                     }
 792
 793                     gdk_image_put_pixel( data_image, x, y, pixel );
 794
 795                     break;
 796                 }
 797                 case 12:  // SGI only
 798                 {
 799                     guint32 pixel = 0;
 800                     switch (b_o)
 801                     {
 802                         case RGB: pixel = ((r & 0xf0) << 4) | (g & 0xf0) | ((b & 0xf0) >> 4); break;
 803                         case RBG: pixel = ((r & 0xf0) << 4) | (b & 0xf0) | ((g & 0xf0) >> 4); break;
 804                         case GRB: pixel = ((g & 0xf0) << 4) | (r & 0xf0) | ((b & 0xf0) >> 4); break;
 805                         case GBR: pixel = ((g & 0xf0) << 4) | (b & 0xf0) | ((r & 0xf0) >> 4); break;
 806                         case BRG: pixel = ((b & 0xf0) << 4) | (r & 0xf0) | ((g & 0xf0) >> 4); break;
 807                         case BGR: pixel = ((b & 0xf0) << 4) | (g & 0xf0) | ((r & 0xf0) >> 4); break;
 808                     }
 809                     gdk_image_put_pixel( data_image, x, y, pixel );
 810                     break;
 811                 }
 812                 case 15:
 813                 {
 814                     guint32 pixel = 0;
 815                     switch (b_o)
 816                     {
 817                         case RGB: pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 818                         case RBG: pixel = ((r & 0xf8) << 7) | ((b & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 819                         case GRB: pixel = ((g & 0xf8) << 7) | ((r & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 820                         case GBR: pixel = ((g & 0xf8) << 7) | ((b & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 821                         case BRG: pixel = ((b & 0xf8) << 7) | ((r & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 822                         case BGR: pixel = ((b & 0xf8) << 7) | ((g & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 823                     }
 824                     gdk_image_put_pixel( data_image, x, y, pixel );
 825                     break;
 826                 }
 827                 case 16:
 828                 {
 829                     // I actually don't know if for 16-bit displays, it is alway the green
 830                     // component or the second component which has 6 bits.
 831                     guint32 pixel = 0;
 832                     switch (b_o)
 833                     {
 834                         case RGB: pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 835                         case RBG: pixel = ((r & 0xf8) << 8) | ((b & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 836                         case GRB: pixel = ((g & 0xf8) << 8) | ((r & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 837                         case GBR: pixel = ((g & 0xf8) << 8) | ((b & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 838                         case BRG: pixel = ((b & 0xf8) << 8) | ((r & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 839                         case BGR: pixel = ((b & 0xf8) << 8) | ((g & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 840                     }
 841                     gdk_image_put_pixel( data_image, x, y, pixel );
 842                     break;
 843                 }
 844                 case 32:
 845                 case 24:
 846                 {
 847                     guint32 pixel = 0;
 848                     switch (b_o)
 849                     {
 850                         case RGB: pixel = (r << 16) | (g << 8) | b; break;
 851                         case RBG: pixel = (r << 16) | (b << 8) | g; break;
 852                         case BRG: pixel = (b << 16) | (r << 8) | g; break;
 853                         case BGR: pixel = (b << 16) | (g << 8) | r; break;
 854                         case GRB: pixel = (g << 16) | (r << 8) | b; break;
 855                         case GBR: pixel = (g << 16) | (b << 8) | r; break;
 856                     }
 857                     gdk_image_put_pixel( data_image, x, y, pixel );
 858                     break;
 859                 }
 860                 default: break;
 861             }
 862         } // for
 863     }  // for
 864
 865     // Blit picture
 866
 867     GdkGC *data_gc = gdk_gc_new( GetPixmap() );
 868
 869     gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 870
 871     gdk_image_destroy( data_image );
 872     gdk_gc_unref( data_gc );
 873
 874     // Blit mask
 875
 876     if (image.HasMask())
 877     {
 878         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 879
 880         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 881
 882         gdk_image_destroy( mask_image );
 883         gdk_gc_unref( mask_gc );
 884     }
 885
 886     return true;
 887 }
 888
 889 wxImage wxBitmap::ConvertToImage() const
 890 {
 891     wxImage image;
 892
 893     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 894
 895     image.Create(GetWidth(), GetHeight());
 896     unsigned char *data = image.GetData();
 897
 898     if (!data)
 899     {
 900         wxFAIL_MSG( wxT("couldn't create image") );
 901         return wxNullImage;
 902     }
 903
 904     // the colour used as transparent one in wxImage and the one it is
 905     // replaced with when it really occurs in the bitmap
 906     static const int MASK_RED = 1;
 907     static const int MASK_GREEN = 2;
 908     static const int MASK_BLUE = 3;
 909     static const int MASK_BLUE_REPLACEMENT = 2;
 910
 911     GdkImage *gdk_image = (GdkImage*) NULL;
 912
 913     if (HasPixmap())
 914     {
 915         gdk_image = gdk_image_get( GetPixmap(),
 916                                     0, 0,
 917                                     GetWidth(), GetHeight() );
 918     }
 919     else if (GetBitmap())
 920     {
 921         gdk_image = gdk_image_get( GetBitmap(),
 922                                     0, 0,
 923                                     GetWidth(), GetHeight() );
 924     }
 925     else
 926     {
 927         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 928     }
 929
 930     wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
 931
 932     GdkImage *gdk_image_mask = (GdkImage*) NULL;
 933     if (GetMask())
 934     {
 935         gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
 936                                         0, 0,
 937                                         GetWidth(), GetHeight() );
 938
 939         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
 940     }
 941
 942     int bpp = -1;
 943     int red_shift_right = 0;
 944     int green_shift_right = 0;
 945     int blue_shift_right = 0;
 946     int red_shift_left = 0;
 947     int green_shift_left = 0;
 948     int blue_shift_left = 0;
 949     bool use_shift = false;
 950
 951     if (GetPixmap())
 952     {
 953         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 954         if (visual == NULL)
 955             visual = wxTheApp->GetGdkVisual();
 956
 957         bpp = visual->depth;
 958         if (bpp == 16)
 959             bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
 960         red_shift_right = visual->red_shift;
 961         red_shift_left = 8-visual->red_prec;
 962         green_shift_right = visual->green_shift;
 963         green_shift_left = 8-visual->green_prec;
 964         blue_shift_right = visual->blue_shift;
 965         blue_shift_left = 8-visual->blue_prec;
 966
 967         use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
 968     }
 969     if (GetBitmap())
 970     {
 971         bpp = 1;
 972     }
 973
 974
 975     GdkColormap *cmap = gtk_widget_get_default_colormap();
 976
 977     long pos = 0;
 978     for (int j = 0; j < GetHeight(); j++)
 979     {
 980         for (int i = 0; i < GetWidth(); i++)
 981         {
 982             wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
 983             if (bpp == 1)
 984             {
 985                 if (pixel == 0)
 986                 {
 987                     data[pos]   = 0;
 988                     data[pos+1] = 0;
 989                     data[pos+2] = 0;
 990                 }
 991                 else
 992                 {
 993                     data[pos]   = 255;
 994                     data[pos+1] = 255;
 995                     data[pos+2] = 255;
 996                 }
 997             }
 998             else if (use_shift)
 999             {
1000                 data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
1001                 data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
1002                 data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
1003             }
1004             else if (cmap->colors)
1005             {
1006                 data[pos] =   cmap->colors[pixel].red   >> 8;
1007                 data[pos+1] = cmap->colors[pixel].green >> 8;
1008                 data[pos+2] = cmap->colors[pixel].blue  >> 8;
1009             }
1010             else
1011             {
1012                 wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
1013             }
1014
1015             if (gdk_image_mask)
1016             {
1017                 int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
1018                 if (mask_pixel == 0)
1019                 {
1020                     data[pos] = MASK_RED;
1021                     data[pos+1] = MASK_GREEN;
1022                     data[pos+2] = MASK_BLUE;
1023                 }
1024                 else if ( data[pos] == MASK_RED &&
1025                             data[pos+1] == MASK_GREEN &&
1026                                 data[pos+2] == MASK_BLUE )
1027                 {
1028                     data[pos+2] = MASK_BLUE_REPLACEMENT;
1029                 }
1030             }
1031
1032             pos += 3;
1033         }
1034     }
1035
1036     gdk_image_destroy( gdk_image );
1037     if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
1038
1039     return image;
1040 }
1041
1042 wxBitmap::wxBitmap( const wxString &filename, wxBitmapType type )
1043 {
1044     LoadFile( filename, type );
1045 }
1046
1047 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
1048 {
1049     if ( width > 0 && height > 0 )
1050     {
1051         m_refData = new wxBitmapRefData();
1052
1053         M_BMPDATA->m_mask = (wxMask *) NULL;
1054         M_BMPDATA->m_bitmap = gdk_bitmap_create_from_data
1055                               (
1056                                 wxGetRootWindow()->window,
1057                                 (gchar *) bits,
1058                                 width,
1059                                 height
1060                               );
1061         M_BMPDATA->m_width = width;
1062         M_BMPDATA->m_height = height;
1063         M_BMPDATA->m_bpp = 1;
1064
1065         wxASSERT_MSG( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
1066     }
1067 }
1068
1069 wxBitmap::~wxBitmap()
1070 {
1071 }
1072
1073 bool wxBitmap::operator == ( const wxBitmap& bmp ) const
1074 {
1075     return m_refData == bmp.m_refData;
1076 }
1077
1078 bool wxBitmap::operator != ( const wxBitmap& bmp ) const
1079 {
1080     return m_refData != bmp.m_refData;
1081 }
1082
1083 bool wxBitmap::Ok() const
1084 {
1085     return (m_refData != NULL) &&
1086            (M_BMPDATA->m_bitmap || M_BMPDATA->m_pixmap);
1087 }
1088
1089 int wxBitmap::GetHeight() const
1090 {
1091     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1092
1093     return M_BMPDATA->m_height;
1094 }
1095
1096 int wxBitmap::GetWidth() const
1097 {
1098     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1099
1100     return M_BMPDATA->m_width;
1101 }
1102
1103 int wxBitmap::GetDepth() const
1104 {
1105     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1106
1107     return M_BMPDATA->m_bpp;
1108 }
1109
1110 wxMask *wxBitmap::GetMask() const
1111 {
1112     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1113
1114     return M_BMPDATA->m_mask;
1115 }
1116
1117 void wxBitmap::SetMask( wxMask *mask )
1118 {
1119     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
1120
1121     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
1122
1123     M_BMPDATA->m_mask = mask;
1124 }
1125
1126 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
1127 {
1128     *this = icon;
1129     return true;
1130 }
1131
1132 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1133 {
1134     wxCHECK_MSG( Ok() &&
1135                  (rect.x >= 0) && (rect.y >= 0) &&
1136                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
1137                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1138
1139     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
1140     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1141
1142     if (ret.GetPixmap())
1143     {
1144         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1145         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1146         gdk_gc_destroy( gc );
1147     }
1148     else
1149     {
1150         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
1151         GdkColor col;
1152         col.pixel = 0xFFFFFF;
1153         gdk_gc_set_foreground( gc, &col );
1154         col.pixel = 0;
1155         gdk_gc_set_background( gc, &col );
1156         gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1157         gdk_gc_destroy( gc );
1158     }
1159
1160     if (GetMask())
1161     {
1162         wxMask *mask = new wxMask;
1163         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
1164
1165         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
1166         GdkColor col;
1167         col.pixel = 0xFFFFFF;
1168         gdk_gc_set_foreground( gc, &col );
1169         col.pixel = 0;
1170         gdk_gc_set_background( gc, &col );
1171         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height );
1172         gdk_gc_destroy( gc );
1173
1174         ret.SetMask( mask );
1175     }
1176
1177     return ret;
1178 }
1179
1180 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
1181 {
1182     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1183
1184     // Try to save the bitmap via wxImage handlers:
1185     {
1186         wxImage image = ConvertToImage();
1187         if (image.Ok()) return image.SaveFile( name, type );
1188     }
1189
1190     return false;
1191 }
1192
1193 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
1194 {
1195     UnRef();
1196
1197     if (!wxFileExists(name))
1198         return false;
1199
1200     GdkVisual *visual = wxTheApp->GetGdkVisual();
1201
1202     if (type == wxBITMAP_TYPE_XPM)
1203     {
1204         m_refData = new wxBitmapRefData();
1205
1206         GdkBitmap *mask = (GdkBitmap*) NULL;
1207
1208         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
1209                               (
1210                                 wxGetRootWindow()->window,
1211                                 &mask,
1212                                 NULL,
1213                                 name.fn_str()
1214                               );
1215
1216         if (mask)
1217         {
1218            M_BMPDATA->m_mask = new wxMask();
1219            M_BMPDATA->m_mask->m_bitmap = mask;
1220         }
1221
1222         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
1223
1224         M_BMPDATA->m_bpp = visual->depth;
1225     }
1226     else // try if wxImage can load it
1227     {
1228         wxImage image;
1229         if ( !image.LoadFile( name, type ) || !image.Ok() )
1230             return false;
1231
1232         *this = wxBitmap(image);
1233     }
1234
1235     return true;
1236 }
1237
1238 #if wxUSE_PALETTE
1239 wxPalette *wxBitmap::GetPalette() const
1240 {
1241     if (!Ok())
1242         return (wxPalette *) NULL;
1243
1244     return M_BMPDATA->m_palette;
1245 }
1246
1247 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
1248 {
1249     // TODO
1250 }
1251 #endif // wxUSE_PALETTE
1252
1253 void wxBitmap::SetHeight( int height )
1254 {
1255     if (!m_refData)
1256         m_refData = new wxBitmapRefData();
1257
1258     M_BMPDATA->m_height = height;
1259 }
1260
1261 void wxBitmap::SetWidth( int width )
1262 {
1263     if (!m_refData)
1264         m_refData = new wxBitmapRefData();
1265
1266     M_BMPDATA->m_width = width;
1267 }
1268
1269 void wxBitmap::SetDepth( int depth )
1270 {
1271     if (!m_refData)
1272         m_refData = new wxBitmapRefData();
1273
1274     M_BMPDATA->m_bpp = depth;
1275 }
1276
1277 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1278 {
1279     if (!m_refData)
1280         m_refData = new wxBitmapRefData();
1281
1282     M_BMPDATA->m_pixmap = pixmap;
1283 }
1284
1285 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
1286 {
1287     if (!m_refData)
1288         m_refData = new wxBitmapRefData();
1289
1290     M_BMPDATA->m_bitmap = bitmap;
1291 }
1292
1293 GdkPixmap *wxBitmap::GetPixmap() const
1294 {
1295     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
1296
1297     return M_BMPDATA->m_pixmap;
1298 }
1299
1300 bool wxBitmap::HasPixmap() const
1301 {
1302     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1303
1304     return M_BMPDATA->m_pixmap != NULL;
1305 }
1306
1307 GdkBitmap *wxBitmap::GetBitmap() const
1308 {
1309     wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, wxT("invalid bitmap") );
1310
1311     return M_BMPDATA->m_bitmap;
1312 }
1313
1314 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1315 {
1316     return NULL;
1317 }
1318
1319 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
1320 {
1321 }
1322
1323
1324 bool wxBitmap::HasAlpha() const
1325 {
1326     return false;
1327 }
1328
1329 void wxBitmap::UseAlpha()
1330 {
1331 }
1332
1333 //-----------------------------------------------------------------------------
1334 // wxBitmapHandler
1335 //-----------------------------------------------------------------------------
1336
1337 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler,wxBitmapHandlerBase)
1338
1339 wxBitmapHandler::~wxBitmapHandler()
1340 {
1341 }
1342
1343 bool wxBitmapHandler::Create(wxBitmap * WXUNUSED(bitmap),
1344                              void * WXUNUSED(data),
1345                              long WXUNUSED(type),
1346                              int WXUNUSED(width),
1347                              int WXUNUSED(height),
1348                              int WXUNUSED(depth))
1349 {
1350     wxFAIL_MSG( _T("not implemented") );
1351
1352     return false;
1353 }
1354
1355 bool wxBitmapHandler::LoadFile(wxBitmap * WXUNUSED(bitmap),
1356                                const wxString& WXUNUSED(name),
1357                                long WXUNUSED(flags),
1358                                int WXUNUSED(desiredWidth),
1359                                int WXUNUSED(desiredHeight))
1360 {
1361     wxFAIL_MSG( _T("not implemented") );
1362
1363     return false;
1364 }
1365
1366 bool wxBitmapHandler::SaveFile(const wxBitmap * WXUNUSED(bitmap),
1367                                const wxString& WXUNUSED(name),
1368                                int WXUNUSED(type),
1369                                const wxPalette * WXUNUSED(palette))
1370 {
1371     wxFAIL_MSG( _T("not implemented") );
1372
1373     return false;
1374 }
1375
1376 /* static */ void wxBitmap::InitStandardHandlers()
1377 {
1378     // TODO: Insert handler based on GdkPixbufs handler later
1379 }