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