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 #endif // WX_PRECOMP
  21
  22 #include "wx/filefn.h"
  23 #include "wx/image.h"
  24
  25 #include <gdk/gdk.h>
  26 #include <gtk/gtk.h>
  27 #include <gdk/gdkx.h>
  28
  29 #include <gdk/gdkrgb.h>
  30
  31 #include "wx/math.h"
  32
  33 extern
  34 void gdk_wx_draw_bitmap (GdkDrawable  *drawable,
  35                          GdkGC        *gc,
  36                          GdkDrawable  *src,
  37                          gint          xsrc,
  38                          gint          ysrc,
  39                          gint          xdest,
  40                          gint          ydest,
  41                          gint          width,
  42                          gint          height);
  43
  44 //-----------------------------------------------------------------------------
  45 // data
  46 //-----------------------------------------------------------------------------
  47
  48 extern GtkWidget *wxGetRootWindow();
  49
  50 //-----------------------------------------------------------------------------
  51 // wxMask
  52 //-----------------------------------------------------------------------------
  53
  54 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  55
  56 wxMask::wxMask()
  57 {
  58     m_bitmap = (GdkBitmap *) NULL;
  59 }
  60
  61 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  62 {
  63     m_bitmap = (GdkBitmap *) NULL;
  64     Create( bitmap, colour );
  65 }
  66
  67 #if wxUSE_PALETTE
  68 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  69 {
  70     m_bitmap = (GdkBitmap *) NULL;
  71     Create( bitmap, paletteIndex );
  72 }
  73 #endif // wxUSE_PALETTE
  74
  75 wxMask::wxMask( const wxBitmap& bitmap )
  76 {
  77     m_bitmap = (GdkBitmap *) NULL;
  78     Create( bitmap );
  79 }
  80
  81 wxMask::~wxMask()
  82 {
  83     if (m_bitmap)
  84         gdk_bitmap_unref( m_bitmap );
  85 }
  86
  87 bool wxMask::Create( const wxBitmap& bitmap,
  88                      const wxColour& colour )
  89 {
  90     if (m_bitmap)
  91     {
  92         gdk_bitmap_unref( m_bitmap );
  93         m_bitmap = (GdkBitmap*) NULL;
  94     }
  95
  96     wxImage image = bitmap.ConvertToImage();
  97     if (!image.Ok()) return false;
  98
  99     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, image.GetWidth(), image.GetHeight(), 1 );
 100     GdkGC *gc = gdk_gc_new( m_bitmap );
 101
 102     GdkColor color;
 103     color.red = 65000;
 104     color.green = 65000;
 105     color.blue = 65000;
 106     color.pixel = 1;
 107     gdk_gc_set_foreground( gc, &color );
 108     gdk_gc_set_fill( gc, GDK_SOLID );
 109     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
 110
 111     unsigned char *data = image.GetData();
 112     int index = 0;
 113
 114     unsigned char red = colour.Red();
 115     unsigned char green = colour.Green();
 116     unsigned char blue = colour.Blue();
 117
 118     GdkVisual *visual = wxTheApp->GetGdkVisual();
 119
 120     int bpp = visual->depth;
 121     if ((bpp == 16) && (visual->red_mask != 0xf800))
 122         bpp = 15;
 123     if (bpp == 15)
 124     {
 125         red = red & 0xf8;
 126         green = green & 0xf8;
 127         blue = blue & 0xf8;
 128     }
 129     else if (bpp == 16)
 130     {
 131         red = red & 0xf8;
 132         green = green & 0xfc;
 133         blue = blue & 0xf8;
 134     }
 135     else if (bpp == 12)
 136     {
 137         red = red & 0xf0;
 138         green = green & 0xf0;
 139         blue = blue & 0xf0;
 140     }
 141
 142     color.red = 0;
 143     color.green = 0;
 144     color.blue = 0;
 145     color.pixel = 0;
 146     gdk_gc_set_foreground( gc, &color );
 147
 148     for (int j = 0; j < image.GetHeight(); j++)
 149     {
 150         int start_x = -1;
 151         int i;
 152         for (i = 0; i < image.GetWidth(); i++)
 153         {
 154             if ((data[index] == red) &&
 155                 (data[index+1] == green) &&
 156                 (data[index+2] == blue))
 157             {
 158                 if (start_x == -1)
 159                 start_x = i;
 160             }
 161             else
 162             {
 163                 if (start_x != -1)
 164                 {
 165                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 166                     start_x = -1;
 167                 }
 168             }
 169             index += 3;
 170         }
 171         if (start_x != -1)
 172             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 173     }
 174
 175     gdk_gc_unref( gc );
 176
 177     return true;
 178 }
 179
 180 #if wxUSE_PALETTE
 181 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 182 {
 183     unsigned char r,g,b;
 184     wxPalette *pal = bitmap.GetPalette();
 185
 186     wxCHECK_MSG( pal, false, wxT("Cannot create mask from bitmap without palette") );
 187
 188     pal->GetRGB(paletteIndex, &r, &g, &b);
 189
 190     return Create(bitmap, wxColour(r, g, b));
 191 }
 192 #endif // wxUSE_PALETTE
 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)
 257         gdk_pixmap_unref( m_pixmap );
 258     if (m_bitmap)
 259         gdk_bitmap_unref( m_bitmap );
 260     delete m_mask;
 261 #if wxUSE_PALETTE
 262     delete m_palette;
 263 #endif // wxUSE_PALETTE
 264 }
 265
 266 //-----------------------------------------------------------------------------
 267
 268 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 269
 270 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 271
 272 wxBitmap::wxBitmap()
 273 {
 274 }
 275
 276 wxBitmap::wxBitmap( int width, int height, int depth )
 277 {
 278     Create( width, height, depth );
 279 }
 280
 281 bool wxBitmap::Create( int width, int height, int depth )
 282 {
 283     UnRef();
 284
 285     if ( width <= 0 || height <= 0 )
 286     {
 287         return false;
 288     }
 289
 290     GdkVisual *visual = wxTheApp->GetGdkVisual();
 291
 292     if (depth == -1)
 293         depth = visual->depth;
 294
 295     wxCHECK_MSG( (depth == visual->depth) || (depth == 1) || (depth == 32), false,
 296                     wxT("invalid bitmap depth") );
 297
 298     m_refData = new wxBitmapRefData();
 299     M_BMPDATA->m_mask = (wxMask *) NULL;
 300     M_BMPDATA->m_width = width;
 301     M_BMPDATA->m_height = height;
 302     if (depth == 1)
 303     {
 304         M_BMPDATA->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 305         M_BMPDATA->m_bpp = 1;
 306     }
 307     else
 308     {
 309         M_BMPDATA->m_pixmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, depth );
 310         M_BMPDATA->m_bpp = visual->depth;
 311     }
 312
 313     return Ok();
 314 }
 315
 316 bool wxBitmap::CreateFromXpm( const char **bits )
 317 {
 318     UnRef();
 319
 320     wxCHECK_MSG( bits != NULL, false, wxT("invalid bitmap data") );
 321
 322     GdkVisual *visual = wxTheApp->GetGdkVisual();
 323
 324     m_refData = new wxBitmapRefData();
 325
 326     GdkBitmap *mask = (GdkBitmap*) NULL;
 327
 328     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxGetRootWindow()->window, &mask, NULL, (gchar **) bits );
 329
 330     wxCHECK_MSG( M_BMPDATA->m_pixmap, false, wxT("couldn't create pixmap") );
 331
 332     if (mask)
 333     {
 334         M_BMPDATA->m_mask = new wxMask();
 335         M_BMPDATA->m_mask->m_bitmap = mask;
 336     }
 337
 338     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 339
 340     M_BMPDATA->m_bpp = visual->depth;  // Can we get a different depth from create_from_xpm_d() ?
 341
 342     return true;
 343 }
 344
 345 wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
 346 {
 347     wxCHECK_MSG( Ok(), wxNullBitmap, wxT("invalid bitmap") );
 348
 349     if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 350         return *this;
 351
 352     int width = wxMax(newx, 1);
 353     int height = wxMax(newy, 1);
 354     width = wxMin(width, clipwidth);
 355     height = wxMin(height, clipheight);
 356
 357     wxBitmap bmp;
 358
 359     GdkImage *img = (GdkImage*) NULL;
 360     if (GetPixmap())
 361         img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
 362     else if (GetBitmap())
 363         img = gdk_image_get( GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 364     else
 365         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 366
 367     wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
 368
 369     int bpp = -1;
 370
 371
 372     GdkGC *gc = NULL;
 373     GdkPixmap *dstpix = NULL;
 374     if (GetPixmap())
 375     {
 376         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 377         if (visual == NULL)
 378             visual = wxTheApp->GetGdkVisual();
 379
 380         bpp = visual->depth;
 381         bmp = wxBitmap(width,height,bpp);
 382         dstpix = bmp.GetPixmap();
 383         gc = gdk_gc_new( dstpix );
 384     }
 385
 386     char *dst = NULL;
 387     long dstbyteperline = 0;
 388
 389     if (GetBitmap())
 390     {
 391         bpp = 1;
 392         dstbyteperline = width/8*M_BMPDATA->m_bpp;
 393         if (width*M_BMPDATA->m_bpp % 8 != 0)
 394             dstbyteperline++;
 395         dst = (char*) malloc(dstbyteperline*height);
 396     }
 397
 398     // be careful to use the right scaling factor
 399     float scx = (float)M_BMPDATA->m_width/(float)newx;
 400     float scy = (float)M_BMPDATA->m_height/(float)newy;
 401     // prepare accel-tables
 402     int *tablex = (int *)calloc(width,sizeof(int));
 403     int *tabley = (int *)calloc(height,sizeof(int));
 404
 405     // accel table filled with clipped values
 406     for (int x = 0; x < width; x++)
 407         tablex[x] = (int) (scx * (x+clipx));
 408     for (int y = 0; y < height; y++)
 409         tabley[y] = (int) (scy * (y+clipy));
 410
 411     // Main rescaling routine starts here
 412     for (int h = 0; h < height; h++)
 413     {
 414         char outbyte = 0;
 415         int old_x = -1;
 416         guint32 old_pixval = 0;
 417
 418         for (int w = 0; w < width; w++)
 419         {
 420             guint32 pixval;
 421             int x = tablex[w];
 422             if (x == old_x)
 423                 pixval = old_pixval;
 424             else
 425             {
 426                 pixval = gdk_image_get_pixel( img, x, tabley[h] );
 427                 old_pixval = pixval;
 428                 old_x = x;
 429             }
 430
 431             if (bpp == 1)
 432             {
 433                 if (!pixval)
 434                 {
 435                     char bit=1;
 436                     char shift = bit << (w % 8);
 437                     outbyte |= shift;
 438                 }
 439
 440                 if ((w+1)%8==0)
 441                 {
 442                     dst[h*dstbyteperline+w/8] = outbyte;
 443                     outbyte = 0;
 444                 }
 445             }
 446             else
 447             {
 448                 GdkColor col;
 449                 col.pixel = pixval;
 450                 gdk_gc_set_foreground( gc, &col );
 451                 gdk_draw_point( dstpix, gc, w, h);
 452             }
 453         }
 454
 455         // do not forget the last byte
 456         if ((bpp == 1) && (width % 8 != 0))
 457             dst[h*dstbyteperline+width/8] = outbyte;
 458     }
 459
 460     gdk_image_destroy( img );
 461     if (gc) gdk_gc_unref( gc );
 462
 463     if (bpp == 1)
 464     {
 465         bmp = wxBitmap( (const char *)dst, width, height, 1 );
 466         free( dst );
 467     }
 468
 469     if (GetMask())
 470     {
 471         dstbyteperline = width/8;
 472         if (width % 8 != 0)
 473             dstbyteperline++;
 474         dst = (char*) malloc(dstbyteperline*height);
 475         img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 476
 477         for (int h = 0; h < height; h++)
 478         {
 479             char outbyte = 0;
 480             int old_x = -1;
 481             guint32 old_pixval = 0;
 482
 483             for (int w = 0; w < width; w++)
 484             {
 485                 guint32 pixval;
 486                 int x = tablex[w];
 487                 if (x == old_x)
 488                     pixval = old_pixval;
 489                 else
 490                 {
 491                     pixval = gdk_image_get_pixel( img, x, tabley[h] );
 492                     old_pixval = pixval;
 493                     old_x = x;
 494                 }
 495
 496                 if (pixval)
 497                 {
 498                     char bit=1;
 499                     char shift = bit << (w % 8);
 500                     outbyte |= shift;
 501                 }
 502
 503                 if ((w+1)%8 == 0)
 504                 {
 505                     dst[h*dstbyteperline+w/8] = outbyte;
 506                     outbyte = 0;
 507                 }
 508             }
 509
 510             // do not forget the last byte
 511             if (width % 8 != 0)
 512                 dst[h*dstbyteperline+width/8] = outbyte;
 513         }
 514         wxMask* mask = new wxMask;
 515         mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
 516         bmp.SetMask(mask);
 517
 518         free( dst );
 519         gdk_image_destroy( img );
 520     }
 521
 522     free( tablex );
 523     free( tabley );
 524
 525     return bmp;
 526 }
 527
 528 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 529 {
 530     UnRef();
 531
 532     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 533     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 534
 535     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 536         return false;
 537
 538     m_refData = new wxBitmapRefData();
 539
 540     if (depth == 1)
 541     {
 542         return CreateFromImageAsBitmap(image);
 543     }
 544     else
 545     {
 546         return CreateFromImageAsPixmap(image);
 547     }
 548 }
 549
 550 // conversion to mono bitmap:
 551 bool wxBitmap::CreateFromImageAsBitmap(const wxImage& img)
 552 {
 553     // convert alpha channel to mask, if it is present:
 554     wxImage image(img);
 555     image.ConvertAlphaToMask();
 556
 557     int width = image.GetWidth();
 558     int height = image.GetHeight();
 559
 560     SetHeight( height );
 561     SetWidth( width );
 562
 563     SetBitmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 564
 565     SetDepth( 1 );
 566
 567     GdkVisual *visual = wxTheApp->GetGdkVisual();
 568
 569     // Create picture image
 570
 571     unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 572
 573     GdkImage *data_image =
 574         gdk_image_new_bitmap( visual, data_data, width, height );
 575
 576     // Create mask image
 577
 578     GdkImage *mask_image = (GdkImage*) NULL;
 579
 580     if (image.HasMask())
 581     {
 582         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 583
 584         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 585
 586         wxMask *mask = new wxMask();
 587         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 588
 589         SetMask( mask );
 590     }
 591
 592     int r_mask = image.GetMaskRed();
 593     int g_mask = image.GetMaskGreen();
 594     int b_mask = image.GetMaskBlue();
 595
 596     unsigned char* data = image.GetData();
 597
 598     int index = 0;
 599     for (int y = 0; y < height; y++)
 600     {
 601         for (int x = 0; x < width; x++)
 602         {
 603             int r = data[index];
 604             index++;
 605             int g = data[index];
 606             index++;
 607             int b = data[index];
 608             index++;
 609
 610             if (image.HasMask())
 611             {
 612                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 613                     gdk_image_put_pixel( mask_image, x, y, 1 );
 614                 else
 615                     gdk_image_put_pixel( mask_image, x, y, 0 );
 616             }
 617
 618             if ((r == 255) && (b == 255) && (g == 255))
 619                 gdk_image_put_pixel( data_image, x, y, 1 );
 620             else
 621                 gdk_image_put_pixel( data_image, x, y, 0 );
 622
 623         } // for
 624     }  // for
 625
 626     // Blit picture
 627
 628     GdkGC *data_gc = gdk_gc_new( GetBitmap() );
 629
 630     gdk_draw_image( GetBitmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 631
 632     gdk_image_destroy( data_image );
 633     gdk_gc_unref( data_gc );
 634
 635     // Blit mask
 636
 637     if (image.HasMask())
 638     {
 639         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 640
 641         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 642
 643         gdk_image_destroy( mask_image );
 644         gdk_gc_unref( mask_gc );
 645     }
 646
 647     return true;
 648 }
 649
 650 // conversion to colour bitmap:
 651 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& img)
 652 {
 653     // convert alpha channel to mask, if it is present:
 654     wxImage image(img);
 655     image.ConvertAlphaToMask();
 656
 657     int width = image.GetWidth();
 658     int height = image.GetHeight();
 659
 660     SetHeight( height );
 661     SetWidth( width );
 662
 663     SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 664
 665     GdkVisual *visual = wxTheApp->GetGdkVisual();
 666
 667     int bpp = visual->depth;
 668
 669     SetDepth( bpp );
 670
 671     if ((bpp == 16) && (visual->red_mask != 0xf800))
 672         bpp = 15;
 673     else if (bpp < 8)
 674         bpp = 8;
 675
 676     // We handle 8-bit bitmaps ourselves using the colour cube, 12-bit
 677     // visuals are not supported by GDK so we do these ourselves, too.
 678     // 15-bit and 16-bit should actually work and 24-bit certainly does.
 679 #ifdef __sgi
 680     if (!image.HasMask() && (bpp > 16))
 681 #else
 682     if (!image.HasMask() && (bpp > 12))
 683 #endif
 684     {
 685         static bool s_hasInitialized = false;
 686
 687         if (!s_hasInitialized)
 688         {
 689             gdk_rgb_init();
 690             s_hasInitialized = true;
 691         }
 692
 693         GdkGC *gc = gdk_gc_new( GetPixmap() );
 694
 695         gdk_draw_rgb_image( GetPixmap(),
 696                             gc,
 697                             0, 0,
 698                             width, height,
 699                             GDK_RGB_DITHER_NONE,
 700                             image.GetData(),
 701                             width*3 );
 702
 703         gdk_gc_unref( gc );
 704         return true;
 705     }
 706
 707     // Create picture image
 708
 709     GdkImage *data_image =
 710         gdk_image_new( GDK_IMAGE_FASTEST, visual, width, height );
 711
 712     // Create mask image
 713
 714     GdkImage *mask_image = (GdkImage*) NULL;
 715
 716     if (image.HasMask())
 717     {
 718         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 719
 720         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 721
 722         wxMask *mask = new wxMask();
 723         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 724
 725         SetMask( mask );
 726     }
 727
 728     // Render
 729
 730     enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
 731     byte_order b_o = RGB;
 732
 733     if (bpp > 8)
 734     {
 735         if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
 736         else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RBG;
 737         else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
 738         else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
 739         else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
 740         else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
 741     }
 742
 743     int r_mask = image.GetMaskRed();
 744     int g_mask = image.GetMaskGreen();
 745     int b_mask = image.GetMaskBlue();
 746
 747     unsigned char* data = image.GetData();
 748
 749     int index = 0;
 750     for (int y = 0; y < height; y++)
 751     {
 752         for (int x = 0; x < width; x++)
 753         {
 754             int r = data[index];
 755             index++;
 756             int g = data[index];
 757             index++;
 758             int b = data[index];
 759             index++;
 760
 761             if (image.HasMask())
 762             {
 763                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 764                     gdk_image_put_pixel( mask_image, x, y, 1 );
 765                 else
 766                     gdk_image_put_pixel( mask_image, x, y, 0 );
 767             }
 768
 769             switch (bpp)
 770             {
 771                 case 8:
 772                 {
 773                     int pixel = -1;
 774                     if (wxTheApp->m_colorCube)
 775                     {
 776                         pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
 777                     }
 778                     else
 779                     {
 780                         GdkColormap *cmap = gtk_widget_get_default_colormap();
 781                         GdkColor *colors = cmap->colors;
 782                         int max = 3 * (65536);
 783
 784                         for (int i = 0; i < cmap->size; i++)
 785                         {
 786                             int rdiff = (r << 8) - colors[i].red;
 787                             int gdiff = (g << 8) - colors[i].green;
 788                             int bdiff = (b << 8) - colors[i].blue;
 789                             int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 790                             if (sum < max) { pixel = i; max = sum; }
 791                         }
 792                     }
 793
 794                     gdk_image_put_pixel( data_image, x, y, pixel );
 795
 796                     break;
 797                 }
 798                 case 12:  // SGI only
 799                 {
 800                     guint32 pixel = 0;
 801                     switch (b_o)
 802                     {
 803                         case RGB: pixel = ((r & 0xf0) << 4) | (g & 0xf0) | ((b & 0xf0) >> 4); break;
 804                         case RBG: pixel = ((r & 0xf0) << 4) | (b & 0xf0) | ((g & 0xf0) >> 4); break;
 805                         case GRB: pixel = ((g & 0xf0) << 4) | (r & 0xf0) | ((b & 0xf0) >> 4); break;
 806                         case GBR: pixel = ((g & 0xf0) << 4) | (b & 0xf0) | ((r & 0xf0) >> 4); break;
 807                         case BRG: pixel = ((b & 0xf0) << 4) | (r & 0xf0) | ((g & 0xf0) >> 4); break;
 808                         case BGR: pixel = ((b & 0xf0) << 4) | (g & 0xf0) | ((r & 0xf0) >> 4); break;
 809                     }
 810                     gdk_image_put_pixel( data_image, x, y, pixel );
 811                     break;
 812                 }
 813                 case 15:
 814                 {
 815                     guint32 pixel = 0;
 816                     switch (b_o)
 817                     {
 818                         case RGB: pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 819                         case RBG: pixel = ((r & 0xf8) << 7) | ((b & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 820                         case GRB: pixel = ((g & 0xf8) << 7) | ((r & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 821                         case GBR: pixel = ((g & 0xf8) << 7) | ((b & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 822                         case BRG: pixel = ((b & 0xf8) << 7) | ((r & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 823                         case BGR: pixel = ((b & 0xf8) << 7) | ((g & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 824                     }
 825                     gdk_image_put_pixel( data_image, x, y, pixel );
 826                     break;
 827                 }
 828                 case 16:
 829                 {
 830                     // I actually don't know if for 16-bit displays, it is alway the green
 831                     // component or the second component which has 6 bits.
 832                     guint32 pixel = 0;
 833                     switch (b_o)
 834                     {
 835                         case RGB: pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 836                         case RBG: pixel = ((r & 0xf8) << 8) | ((b & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 837                         case GRB: pixel = ((g & 0xf8) << 8) | ((r & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 838                         case GBR: pixel = ((g & 0xf8) << 8) | ((b & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 839                         case BRG: pixel = ((b & 0xf8) << 8) | ((r & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 840                         case BGR: pixel = ((b & 0xf8) << 8) | ((g & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 841                     }
 842                     gdk_image_put_pixel( data_image, x, y, pixel );
 843                     break;
 844                 }
 845                 case 32:
 846                 case 24:
 847                 {
 848                     guint32 pixel = 0;
 849                     switch (b_o)
 850                     {
 851                         case RGB: pixel = (r << 16) | (g << 8) | b; break;
 852                         case RBG: pixel = (r << 16) | (b << 8) | g; break;
 853                         case BRG: pixel = (b << 16) | (r << 8) | g; break;
 854                         case BGR: pixel = (b << 16) | (g << 8) | r; break;
 855                         case GRB: pixel = (g << 16) | (r << 8) | b; break;
 856                         case GBR: pixel = (g << 16) | (b << 8) | r; break;
 857                     }
 858                     gdk_image_put_pixel( data_image, x, y, pixel );
 859                     break;
 860                 }
 861                 default: break;
 862             }
 863         } // for
 864     }  // for
 865
 866     // Blit picture
 867
 868     GdkGC *data_gc = gdk_gc_new( GetPixmap() );
 869
 870     gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 871
 872     gdk_image_destroy( data_image );
 873     gdk_gc_unref( data_gc );
 874
 875     // Blit mask
 876
 877     if (image.HasMask())
 878     {
 879         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 880
 881         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 882
 883         gdk_image_destroy( mask_image );
 884         gdk_gc_unref( mask_gc );
 885     }
 886
 887     return true;
 888 }
 889
 890 wxImage wxBitmap::ConvertToImage() const
 891 {
 892     wxImage image;
 893
 894     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 895
 896     image.Create(GetWidth(), GetHeight());
 897     unsigned char *data = image.GetData();
 898
 899     if (!data)
 900     {
 901         wxFAIL_MSG( wxT("couldn't create image") );
 902         return wxNullImage;
 903     }
 904
 905     // the colour used as transparent one in wxImage and the one it is
 906     // replaced with when it really occurs in the bitmap
 907     static const int MASK_RED = 1;
 908     static const int MASK_GREEN = 2;
 909     static const int MASK_BLUE = 3;
 910     static const int MASK_BLUE_REPLACEMENT = 2;
 911
 912     GdkImage *gdk_image = (GdkImage*) NULL;
 913
 914     if (HasPixmap())
 915     {
 916         gdk_image = gdk_image_get( GetPixmap(),
 917                                     0, 0,
 918                                     GetWidth(), GetHeight() );
 919     }
 920     else if (GetBitmap())
 921     {
 922         gdk_image = gdk_image_get( GetBitmap(),
 923                                     0, 0,
 924                                     GetWidth(), GetHeight() );
 925     }
 926     else
 927     {
 928         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 929     }
 930
 931     wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
 932
 933     GdkImage *gdk_image_mask = (GdkImage*) NULL;
 934     if (GetMask())
 935     {
 936         gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
 937                                         0, 0,
 938                                         GetWidth(), GetHeight() );
 939
 940         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
 941     }
 942
 943     int bpp = -1;
 944     int red_shift_right = 0;
 945     int green_shift_right = 0;
 946     int blue_shift_right = 0;
 947     int red_shift_left = 0;
 948     int green_shift_left = 0;
 949     int blue_shift_left = 0;
 950     bool use_shift = false;
 951
 952     if (GetPixmap())
 953     {
 954         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 955         if (visual == NULL)
 956             visual = wxTheApp->GetGdkVisual();
 957
 958         bpp = visual->depth;
 959         if (bpp == 16)
 960             bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
 961         red_shift_right = visual->red_shift;
 962         red_shift_left = 8-visual->red_prec;
 963         green_shift_right = visual->green_shift;
 964         green_shift_left = 8-visual->green_prec;
 965         blue_shift_right = visual->blue_shift;
 966         blue_shift_left = 8-visual->blue_prec;
 967
 968         use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
 969     }
 970     if (GetBitmap())
 971     {
 972         bpp = 1;
 973     }
 974
 975
 976     GdkColormap *cmap = gtk_widget_get_default_colormap();
 977
 978     long pos = 0;
 979     for (int j = 0; j < GetHeight(); j++)
 980     {
 981         for (int i = 0; i < GetWidth(); i++)
 982         {
 983             wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
 984             if (bpp == 1)
 985             {
 986                 if (pixel == 0)
 987                 {
 988                     data[pos]   = 0;
 989                     data[pos+1] = 0;
 990                     data[pos+2] = 0;
 991                 }
 992                 else
 993                 {
 994                     data[pos]   = 255;
 995                     data[pos+1] = 255;
 996                     data[pos+2] = 255;
 997                 }
 998             }
 999             else if (use_shift)
1000             {
1001                 data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
1002                 data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
1003                 data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
1004             }
1005             else if (cmap->colors)
1006             {
1007                 data[pos] =   cmap->colors[pixel].red   >> 8;
1008                 data[pos+1] = cmap->colors[pixel].green >> 8;
1009                 data[pos+2] = cmap->colors[pixel].blue  >> 8;
1010             }
1011             else
1012             {
1013                 wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
1014             }
1015
1016             if (gdk_image_mask)
1017             {
1018                 int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
1019                 if (mask_pixel == 0)
1020                 {
1021                     data[pos] = MASK_RED;
1022                     data[pos+1] = MASK_GREEN;
1023                     data[pos+2] = MASK_BLUE;
1024                 }
1025                 else if ( data[pos] == MASK_RED &&
1026                             data[pos+1] == MASK_GREEN &&
1027                                 data[pos+2] == MASK_BLUE )
1028                 {
1029                     data[pos+2] = MASK_BLUE_REPLACEMENT;
1030                 }
1031             }
1032
1033             pos += 3;
1034         }
1035     }
1036
1037     gdk_image_destroy( gdk_image );
1038     if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
1039
1040     return image;
1041 }
1042
1043 wxBitmap::wxBitmap( const wxString &filename, wxBitmapType type )
1044 {
1045     LoadFile( filename, type );
1046 }
1047
1048 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
1049 {
1050     if ( width > 0 && height > 0 )
1051     {
1052         m_refData = new wxBitmapRefData();
1053
1054         M_BMPDATA->m_mask = (wxMask *) NULL;
1055         M_BMPDATA->m_bitmap = gdk_bitmap_create_from_data
1056                               (
1057                                 wxGetRootWindow()->window,
1058                                 (gchar *) bits,
1059                                 width,
1060                                 height
1061                               );
1062         M_BMPDATA->m_width = width;
1063         M_BMPDATA->m_height = height;
1064         M_BMPDATA->m_bpp = 1;
1065
1066         wxASSERT_MSG( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
1067     }
1068 }
1069
1070 wxBitmap::~wxBitmap()
1071 {
1072 }
1073
1074 bool wxBitmap::operator == ( const wxBitmap& bmp ) const
1075 {
1076     return m_refData == bmp.m_refData;
1077 }
1078
1079 bool wxBitmap::operator != ( const wxBitmap& bmp ) const
1080 {
1081     return m_refData != bmp.m_refData;
1082 }
1083
1084 bool wxBitmap::Ok() const
1085 {
1086     return (m_refData != NULL) &&
1087            (M_BMPDATA->m_bitmap || M_BMPDATA->m_pixmap);
1088 }
1089
1090 int wxBitmap::GetHeight() const
1091 {
1092     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1093
1094     return M_BMPDATA->m_height;
1095 }
1096
1097 int wxBitmap::GetWidth() const
1098 {
1099     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1100
1101     return M_BMPDATA->m_width;
1102 }
1103
1104 int wxBitmap::GetDepth() const
1105 {
1106     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1107
1108     return M_BMPDATA->m_bpp;
1109 }
1110
1111 wxMask *wxBitmap::GetMask() const
1112 {
1113     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1114
1115     return M_BMPDATA->m_mask;
1116 }
1117
1118 void wxBitmap::SetMask( wxMask *mask )
1119 {
1120     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
1121
1122     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
1123
1124     M_BMPDATA->m_mask = mask;
1125 }
1126
1127 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
1128 {
1129     *this = icon;
1130     return true;
1131 }
1132
1133 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1134 {
1135     wxCHECK_MSG( Ok() &&
1136                  (rect.x >= 0) && (rect.y >= 0) &&
1137                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
1138                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1139
1140     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
1141     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1142
1143     if (ret.GetPixmap())
1144     {
1145         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1146         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1147         gdk_gc_destroy( gc );
1148     }
1149     else
1150     {
1151         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
1152         GdkColor col;
1153         col.pixel = 0xFFFFFF;
1154         gdk_gc_set_foreground( gc, &col );
1155         col.pixel = 0;
1156         gdk_gc_set_background( gc, &col );
1157         gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1158         gdk_gc_destroy( gc );
1159     }
1160
1161     if (GetMask())
1162     {
1163         wxMask *mask = new wxMask;
1164         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
1165
1166         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
1167         GdkColor col;
1168         col.pixel = 0xFFFFFF;
1169         gdk_gc_set_foreground( gc, &col );
1170         col.pixel = 0;
1171         gdk_gc_set_background( gc, &col );
1172         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height );
1173         gdk_gc_destroy( gc );
1174
1175         ret.SetMask( mask );
1176     }
1177
1178     return ret;
1179 }
1180
1181 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
1182 {
1183     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1184
1185     // Try to save the bitmap via wxImage handlers:
1186     {
1187         wxImage image = ConvertToImage();
1188         if (image.Ok()) return image.SaveFile( name, type );
1189     }
1190
1191     return false;
1192 }
1193
1194 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
1195 {
1196     UnRef();
1197
1198     if (!wxFileExists(name))
1199         return false;
1200
1201     GdkVisual *visual = wxTheApp->GetGdkVisual();
1202
1203     if (type == wxBITMAP_TYPE_XPM)
1204     {
1205         m_refData = new wxBitmapRefData();
1206
1207         GdkBitmap *mask = (GdkBitmap*) NULL;
1208
1209         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
1210                               (
1211                                 wxGetRootWindow()->window,
1212                                 &mask,
1213                                 NULL,
1214                                 name.fn_str()
1215                               );
1216
1217         if (mask)
1218         {
1219            M_BMPDATA->m_mask = new wxMask();
1220            M_BMPDATA->m_mask->m_bitmap = mask;
1221         }
1222
1223         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
1224
1225         M_BMPDATA->m_bpp = visual->depth;
1226     }
1227     else // try if wxImage can load it
1228     {
1229         wxImage image;
1230         if ( !image.LoadFile( name, type ) || !image.Ok() )
1231             return false;
1232
1233         *this = wxBitmap(image);
1234     }
1235
1236     return true;
1237 }
1238
1239 #if wxUSE_PALETTE
1240 wxPalette *wxBitmap::GetPalette() const
1241 {
1242     if (!Ok())
1243         return (wxPalette *) NULL;
1244
1245     return M_BMPDATA->m_palette;
1246 }
1247
1248 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
1249 {
1250     // TODO
1251 }
1252 #endif // wxUSE_PALETTE
1253
1254 void wxBitmap::SetHeight( int height )
1255 {
1256     if (!m_refData)
1257         m_refData = new wxBitmapRefData();
1258
1259     M_BMPDATA->m_height = height;
1260 }
1261
1262 void wxBitmap::SetWidth( int width )
1263 {
1264     if (!m_refData)
1265         m_refData = new wxBitmapRefData();
1266
1267     M_BMPDATA->m_width = width;
1268 }
1269
1270 void wxBitmap::SetDepth( int depth )
1271 {
1272     if (!m_refData)
1273         m_refData = new wxBitmapRefData();
1274
1275     M_BMPDATA->m_bpp = depth;
1276 }
1277
1278 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1279 {
1280     if (!m_refData)
1281         m_refData = new wxBitmapRefData();
1282
1283     M_BMPDATA->m_pixmap = pixmap;
1284 }
1285
1286 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
1287 {
1288     if (!m_refData)
1289         m_refData = new wxBitmapRefData();
1290
1291     M_BMPDATA->m_bitmap = bitmap;
1292 }
1293
1294 GdkPixmap *wxBitmap::GetPixmap() const
1295 {
1296     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
1297
1298     return M_BMPDATA->m_pixmap;
1299 }
1300
1301 bool wxBitmap::HasPixmap() const
1302 {
1303     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1304
1305     return M_BMPDATA->m_pixmap != NULL;
1306 }
1307
1308 GdkBitmap *wxBitmap::GetBitmap() const
1309 {
1310     wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, wxT("invalid bitmap") );
1311
1312     return M_BMPDATA->m_bitmap;
1313 }
1314
1315 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1316 {
1317     return NULL;
1318 }
1319
1320 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
1321 {
1322 }
1323
1324
1325 bool wxBitmap::HasAlpha() const
1326 {
1327     return false;
1328 }
1329
1330 void wxBitmap::UseAlpha()
1331 {
1332 }
1333
1334 //-----------------------------------------------------------------------------
1335 // wxBitmapHandler
1336 //-----------------------------------------------------------------------------
1337
1338 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler,wxBitmapHandlerBase)
1339
1340 wxBitmapHandler::~wxBitmapHandler()
1341 {
1342 }
1343
1344 bool wxBitmapHandler::Create(wxBitmap * WXUNUSED(bitmap),
1345                              void * WXUNUSED(data),
1346                              long WXUNUSED(type),
1347                              int WXUNUSED(width),
1348                              int WXUNUSED(height),
1349                              int WXUNUSED(depth))
1350 {
1351     wxFAIL_MSG( _T("not implemented") );
1352
1353     return false;
1354 }
1355
1356 bool wxBitmapHandler::LoadFile(wxBitmap * WXUNUSED(bitmap),
1357                                const wxString& WXUNUSED(name),
1358                                long WXUNUSED(flags),
1359                                int WXUNUSED(desiredWidth),
1360                                int WXUNUSED(desiredHeight))
1361 {
1362     wxFAIL_MSG( _T("not implemented") );
1363
1364     return false;
1365 }
1366
1367 bool wxBitmapHandler::SaveFile(const wxBitmap * WXUNUSED(bitmap),
1368                                const wxString& WXUNUSED(name),
1369                                int WXUNUSED(type),
1370                                const wxPalette * WXUNUSED(palette))
1371 {
1372     wxFAIL_MSG( _T("not implemented") );
1373
1374     return false;
1375 }
1376
1377 /* static */ void wxBitmap::InitStandardHandlers()
1378 {
1379     // TODO: Insert handler based on GdkPixbufs handler later
1380 }