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 = 0;
 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 = 0;
 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& img, int depth )
 531 {
 532     UnRef();
 533
 534     wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid image") )
 535     wxCHECK_MSG( depth == -1 || depth == 1, FALSE, wxT("invalid bitmap depth") )
 536
 537     // NB: wxGTK doesn't yet support alpha channel in bitmaps. The best we can
 538     //     do is to convert alpha channel to mask, if it is present:
 539     wxImage image(img);
 540     image.ConvertAlphaToMask();
 541
 542     int width = image.GetWidth();
 543     int height = image.GetHeight();
 544
 545     if ( width <= 0 || height <= 0 )
 546     {
 547         return false;
 548     }
 549
 550     m_refData = new wxBitmapRefData();
 551
 552     SetHeight( height );
 553     SetWidth( width );
 554
 555     // ------
 556     // conversion to mono bitmap:
 557     // ------
 558     if (depth == 1)
 559     {
 560         SetBitmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 561
 562         SetDepth( 1 );
 563
 564         GdkVisual *visual = wxTheApp->GetGdkVisual();
 565
 566         // Create picture image
 567
 568         unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 569
 570         GdkImage *data_image =
 571             gdk_image_new_bitmap( visual, data_data, width, height );
 572
 573         // Create mask image
 574
 575         GdkImage *mask_image = (GdkImage*) NULL;
 576
 577         if (image.HasMask())
 578         {
 579             unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 580
 581             mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 582
 583             wxMask *mask = new wxMask();
 584             mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 585
 586             SetMask( mask );
 587         }
 588
 589         int r_mask = image.GetMaskRed();
 590         int g_mask = image.GetMaskGreen();
 591         int b_mask = image.GetMaskBlue();
 592
 593         unsigned char* data = image.GetData();
 594
 595         int index = 0;
 596         for (int y = 0; y < height; y++)
 597         {
 598             for (int x = 0; x < width; x++)
 599             {
 600                 int r = data[index];
 601                 index++;
 602                 int g = data[index];
 603                 index++;
 604                 int b = data[index];
 605                 index++;
 606
 607                 if (image.HasMask())
 608                 {
 609                     if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 610                         gdk_image_put_pixel( mask_image, x, y, 1 );
 611                     else
 612                         gdk_image_put_pixel( mask_image, x, y, 0 );
 613                 }
 614
 615                 if ((r == 255) && (b == 255) && (g == 255))
 616                     gdk_image_put_pixel( data_image, x, y, 1 );
 617                 else
 618                     gdk_image_put_pixel( data_image, x, y, 0 );
 619
 620             } // for
 621         }  // for
 622
 623         // Blit picture
 624
 625         GdkGC *data_gc = gdk_gc_new( GetBitmap() );
 626
 627         gdk_draw_image( GetBitmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 628
 629         gdk_image_destroy( data_image );
 630         gdk_gc_unref( data_gc );
 631
 632         // Blit mask
 633
 634         if (image.HasMask())
 635         {
 636             GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 637
 638             gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 639
 640             gdk_image_destroy( mask_image );
 641             gdk_gc_unref( mask_gc );
 642         }
 643     }
 644
 645     // ------
 646     // conversion to colour bitmap:
 647     // ------
 648     else
 649     {
 650         SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 651
 652         GdkVisual *visual = wxTheApp->GetGdkVisual();
 653
 654         int bpp = visual->depth;
 655
 656         SetDepth( bpp );
 657
 658         if ((bpp == 16) && (visual->red_mask != 0xf800))
 659             bpp = 15;
 660         else if (bpp < 8)
 661             bpp = 8;
 662
 663         // We handle 8-bit bitmaps ourselves using the colour cube, 12-bit
 664         // visuals are not supported by GDK so we do these ourselves, too.
 665         // 15-bit and 16-bit should actually work and 24-bit certainly does.
 666 #ifdef __sgi
 667         if (!image.HasMask() && (bpp > 16))
 668 #else
 669         if (!image.HasMask() && (bpp > 12))
 670 #endif
 671         {
 672             static bool s_hasInitialized = FALSE;
 673
 674             if (!s_hasInitialized)
 675             {
 676                 gdk_rgb_init();
 677                 s_hasInitialized = TRUE;
 678             }
 679
 680             GdkGC *gc = gdk_gc_new( GetPixmap() );
 681
 682             gdk_draw_rgb_image( GetPixmap(),
 683                                 gc,
 684                                 0, 0,
 685                                 width, height,
 686                                 GDK_RGB_DITHER_NONE,
 687                                 image.GetData(),
 688                                 width*3 );
 689
 690             gdk_gc_unref( gc );
 691             return TRUE;
 692         }
 693
 694         // Create picture image
 695
 696         GdkImage *data_image =
 697             gdk_image_new( GDK_IMAGE_FASTEST, visual, width, height );
 698
 699         // Create mask image
 700
 701         GdkImage *mask_image = (GdkImage*) NULL;
 702
 703         if (image.HasMask())
 704         {
 705             unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 706
 707             mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 708
 709             wxMask *mask = new wxMask();
 710             mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 711
 712             SetMask( mask );
 713         }
 714
 715         // Render
 716
 717         enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
 718         byte_order b_o = RGB;
 719
 720         if (bpp > 8)
 721         {
 722             if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
 723             else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RBG;
 724             else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
 725             else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
 726             else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
 727             else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
 728         }
 729
 730         int r_mask = image.GetMaskRed();
 731         int g_mask = image.GetMaskGreen();
 732         int b_mask = image.GetMaskBlue();
 733
 734         unsigned char* data = image.GetData();
 735
 736         int index = 0;
 737         for (int y = 0; y < height; y++)
 738         {
 739             for (int x = 0; x < width; x++)
 740             {
 741                 int r = data[index];
 742                 index++;
 743                 int g = data[index];
 744                 index++;
 745                 int b = data[index];
 746                 index++;
 747
 748                 if (image.HasMask())
 749                 {
 750                     if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 751                         gdk_image_put_pixel( mask_image, x, y, 1 );
 752                     else
 753                         gdk_image_put_pixel( mask_image, x, y, 0 );
 754                 }
 755
 756                 switch (bpp)
 757                 {
 758                     case 8:
 759                     {
 760                         int pixel = -1;
 761                         if (wxTheApp->m_colorCube)
 762                         {
 763                             pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
 764                         }
 765                         else
 766                         {
 767                             GdkColormap *cmap = gtk_widget_get_default_colormap();
 768                             GdkColor *colors = cmap->colors;
 769                             int max = 3 * (65536);
 770
 771                             for (int i = 0; i < cmap->size; i++)
 772                             {
 773                                 int rdiff = (r << 8) - colors[i].red;
 774                                 int gdiff = (g << 8) - colors[i].green;
 775                                 int bdiff = (b << 8) - colors[i].blue;
 776                                 int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 777                                 if (sum < max) { pixel = i; max = sum; }
 778                             }
 779                         }
 780
 781                         gdk_image_put_pixel( data_image, x, y, pixel );
 782
 783                         break;
 784                     }
 785                     case 12:  // SGI only
 786                     {
 787                         guint32 pixel = 0;
 788                         switch (b_o)
 789                         {
 790                             case RGB: pixel = ((r & 0xf0) << 4) | (g & 0xf0) | ((b & 0xf0) >> 4); break;
 791                             case RBG: pixel = ((r & 0xf0) << 4) | (b & 0xf0) | ((g & 0xf0) >> 4); break;
 792                             case GRB: pixel = ((g & 0xf0) << 4) | (r & 0xf0) | ((b & 0xf0) >> 4); break;
 793                             case GBR: pixel = ((g & 0xf0) << 4) | (b & 0xf0) | ((r & 0xf0) >> 4); break;
 794                             case BRG: pixel = ((b & 0xf0) << 4) | (r & 0xf0) | ((g & 0xf0) >> 4); break;
 795                             case BGR: pixel = ((b & 0xf0) << 4) | (g & 0xf0) | ((r & 0xf0) >> 4); break;
 796                         }
 797                         gdk_image_put_pixel( data_image, x, y, pixel );
 798                         break;
 799                     }
 800                     case 15:
 801                     {
 802                         guint32 pixel = 0;
 803                         switch (b_o)
 804                         {
 805                             case RGB: pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 806                             case RBG: pixel = ((r & 0xf8) << 7) | ((b & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 807                             case GRB: pixel = ((g & 0xf8) << 7) | ((r & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 808                             case GBR: pixel = ((g & 0xf8) << 7) | ((b & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 809                             case BRG: pixel = ((b & 0xf8) << 7) | ((r & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 810                             case BGR: pixel = ((b & 0xf8) << 7) | ((g & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 811                         }
 812                         gdk_image_put_pixel( data_image, x, y, pixel );
 813                         break;
 814                     }
 815                     case 16:
 816                     {
 817                         // I actually don't know if for 16-bit displays, it is alway the green
 818                         // component or the second component which has 6 bits.
 819                         guint32 pixel = 0;
 820                         switch (b_o)
 821                         {
 822                             case RGB: pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 823                             case RBG: pixel = ((r & 0xf8) << 8) | ((b & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 824                             case GRB: pixel = ((g & 0xf8) << 8) | ((r & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 825                             case GBR: pixel = ((g & 0xf8) << 8) | ((b & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 826                             case BRG: pixel = ((b & 0xf8) << 8) | ((r & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 827                             case BGR: pixel = ((b & 0xf8) << 8) | ((g & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 828                         }
 829                         gdk_image_put_pixel( data_image, x, y, pixel );
 830                         break;
 831                     }
 832                     case 32:
 833                     case 24:
 834                     {
 835                         guint32 pixel = 0;
 836                         switch (b_o)
 837                         {
 838                             case RGB: pixel = (r << 16) | (g << 8) | b; break;
 839                             case RBG: pixel = (r << 16) | (b << 8) | g; break;
 840                             case BRG: pixel = (b << 16) | (r << 8) | g; break;
 841                             case BGR: pixel = (b << 16) | (g << 8) | r; break;
 842                             case GRB: pixel = (g << 16) | (r << 8) | b; break;
 843                             case GBR: pixel = (g << 16) | (b << 8) | r; break;
 844                         }
 845                         gdk_image_put_pixel( data_image, x, y, pixel );
 846                     }
 847                     default: break;
 848                 }
 849             } // for
 850         }  // for
 851
 852         // Blit picture
 853
 854         GdkGC *data_gc = gdk_gc_new( GetPixmap() );
 855
 856         gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 857
 858         gdk_image_destroy( data_image );
 859         gdk_gc_unref( data_gc );
 860
 861         // Blit mask
 862
 863         if (image.HasMask())
 864         {
 865             GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 866
 867             gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 868
 869             gdk_image_destroy( mask_image );
 870             gdk_gc_unref( mask_gc );
 871         }
 872     }
 873
 874     return TRUE;
 875 }
 876
 877 wxImage wxBitmap::ConvertToImage() const
 878 {
 879     // the colour used as transparent one in wxImage and the one it is replaced
 880     // with when it really occurs in the bitmap
 881     static const int MASK_RED = 1;
 882     static const int MASK_GREEN = 2;
 883     static const int MASK_BLUE = 3;
 884     static const int MASK_BLUE_REPLACEMENT = 2;
 885
 886     wxImage image;
 887
 888     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 889
 890     GdkImage *gdk_image = (GdkImage*) NULL;
 891     if (GetPixmap())
 892     {
 893         gdk_image = gdk_image_get( GetPixmap(),
 894                                    0, 0,
 895                                    GetWidth(), GetHeight() );
 896     }
 897     else if (GetBitmap())
 898     {
 899         gdk_image = gdk_image_get( GetBitmap(),
 900                                    0, 0,
 901                                    GetWidth(), GetHeight() );
 902     }
 903     else
 904     {
 905         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 906     }
 907
 908     wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
 909
 910     image.Create( GetWidth(), GetHeight() );
 911     char unsigned *data = image.GetData();
 912
 913     if (!data)
 914     {
 915         gdk_image_destroy( gdk_image );
 916         wxFAIL_MSG( wxT("couldn't create image") );
 917         return wxNullImage;
 918     }
 919
 920     GdkImage *gdk_image_mask = (GdkImage*) NULL;
 921     if (GetMask())
 922     {
 923         gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
 924                                         0, 0,
 925                                         GetWidth(), GetHeight() );
 926
 927         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
 928     }
 929
 930     int bpp = -1;
 931     int red_shift_right = 0;
 932     int green_shift_right = 0;
 933     int blue_shift_right = 0;
 934     int red_shift_left = 0;
 935     int green_shift_left = 0;
 936     int blue_shift_left = 0;
 937     bool use_shift = FALSE;
 938
 939     if (GetPixmap())
 940     {
 941         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 942         if (visual == NULL)
 943             visual = wxTheApp->GetGdkVisual();
 944
 945         bpp = visual->depth;
 946         if (bpp == 16)
 947             bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
 948         red_shift_right = visual->red_shift;
 949         red_shift_left = 8-visual->red_prec;
 950         green_shift_right = visual->green_shift;
 951         green_shift_left = 8-visual->green_prec;
 952         blue_shift_right = visual->blue_shift;
 953         blue_shift_left = 8-visual->blue_prec;
 954
 955         use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
 956     }
 957     if (GetBitmap())
 958     {
 959         bpp = 1;
 960     }
 961
 962
 963     GdkColormap *cmap = gtk_widget_get_default_colormap();
 964
 965     long pos = 0;
 966     for (int j = 0; j < GetHeight(); j++)
 967     {
 968         for (int i = 0; i < GetWidth(); i++)
 969         {
 970             wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
 971             if (bpp == 1)
 972             {
 973                 if (pixel == 0)
 974                 {
 975                     data[pos]   = 0;
 976                     data[pos+1] = 0;
 977                     data[pos+2] = 0;
 978                 }
 979                 else
 980                 {
 981                     data[pos]   = 255;
 982                     data[pos+1] = 255;
 983                     data[pos+2] = 255;
 984                 }
 985             }
 986             else if (use_shift)
 987             {
 988                 data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
 989                 data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
 990                 data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
 991             }
 992             else if (cmap->colors)
 993             {
 994                 data[pos] =   cmap->colors[pixel].red   >> 8;
 995                 data[pos+1] = cmap->colors[pixel].green >> 8;
 996                 data[pos+2] = cmap->colors[pixel].blue  >> 8;
 997             }
 998             else
 999             {
1000                 wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
1001             }
1002
1003             if (gdk_image_mask)
1004             {
1005                 int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
1006                 if (mask_pixel == 0)
1007                 {
1008                     data[pos] = MASK_RED;
1009                     data[pos+1] = MASK_GREEN;
1010                     data[pos+2] = MASK_BLUE;
1011                 }
1012                 else if ( data[pos] == MASK_RED &&
1013                             data[pos+1] == MASK_GREEN &&
1014                                 data[pos+2] == MASK_BLUE )
1015                 {
1016                     data[pos+2] = MASK_BLUE_REPLACEMENT;
1017                 }
1018             }
1019
1020             pos += 3;
1021         }
1022     }
1023
1024     gdk_image_destroy( gdk_image );
1025     if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
1026
1027     return image;
1028 }
1029
1030 wxBitmap::wxBitmap( const wxBitmap& bmp )
1031         : wxGDIObject()
1032 {
1033     Ref( bmp );
1034 }
1035
1036 wxBitmap::wxBitmap( const wxString &filename, int type )
1037 {
1038     LoadFile( filename, type );
1039 }
1040
1041 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
1042 {
1043     if ( width > 0 && height > 0 )
1044     {
1045         m_refData = new wxBitmapRefData();
1046
1047         M_BMPDATA->m_mask = (wxMask *) NULL;
1048         M_BMPDATA->m_bitmap = gdk_bitmap_create_from_data
1049                               (
1050                                 wxGetRootWindow()->window,
1051                                 (gchar *) bits,
1052                                 width,
1053                                 height
1054                               );
1055         M_BMPDATA->m_width = width;
1056         M_BMPDATA->m_height = height;
1057         M_BMPDATA->m_bpp = 1;
1058
1059         wxASSERT_MSG( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
1060     }
1061 }
1062
1063 wxBitmap::~wxBitmap()
1064 {
1065 }
1066
1067 wxBitmap& wxBitmap::operator = ( const wxBitmap& bmp )
1068 {
1069     if ( m_refData != bmp.m_refData )
1070         Ref( bmp );
1071
1072     return *this;
1073 }
1074
1075 bool wxBitmap::operator == ( const wxBitmap& bmp ) const
1076 {
1077     return m_refData == bmp.m_refData;
1078 }
1079
1080 bool wxBitmap::operator != ( const wxBitmap& bmp ) const
1081 {
1082     return m_refData != bmp.m_refData;
1083 }
1084
1085 bool wxBitmap::Ok() const
1086 {
1087     return (m_refData != NULL) && (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, int type, wxPalette *WXUNUSED(palette) )
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, int 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 wxPalette *wxBitmap::GetPalette() const
1240 {
1241     if (!Ok())
1242         return (wxPalette *) NULL;
1243
1244     return M_BMPDATA->m_palette;
1245 }
1246
1247 void wxBitmap::SetHeight( int height )
1248 {
1249     if (!m_refData)
1250         m_refData = new wxBitmapRefData();
1251
1252     M_BMPDATA->m_height = height;
1253 }
1254
1255 void wxBitmap::SetWidth( int width )
1256 {
1257     if (!m_refData)
1258         m_refData = new wxBitmapRefData();
1259
1260     M_BMPDATA->m_width = width;
1261 }
1262
1263 void wxBitmap::SetDepth( int depth )
1264 {
1265     if (!m_refData)
1266         m_refData = new wxBitmapRefData();
1267
1268     M_BMPDATA->m_bpp = depth;
1269 }
1270
1271 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1272 {
1273     if (!m_refData)
1274         m_refData = new wxBitmapRefData();
1275
1276     M_BMPDATA->m_pixmap = pixmap;
1277 }
1278
1279 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
1280 {
1281     if (!m_refData)
1282         m_refData = new wxBitmapRefData();
1283
1284     M_BMPDATA->m_bitmap = bitmap;
1285 }
1286
1287 GdkPixmap *wxBitmap::GetPixmap() const
1288 {
1289     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
1290
1291     return M_BMPDATA->m_pixmap;
1292 }
1293
1294 GdkBitmap *wxBitmap::GetBitmap() const
1295 {
1296     wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, wxT("invalid bitmap") );
1297
1298     return M_BMPDATA->m_bitmap;
1299 }