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