src/gtk/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/bitmap.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/bitmap.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/app.h"
  17     #include "wx/dcmemory.h"
  18     #include "wx/palette.h"
  19     #include "wx/icon.h"
  20     #include "wx/math.h"
  21     #include "wx/image.h"
  22 #endif
  23
  24 #include "wx/filefn.h"
  25
  26 #include "wx/rawbmp.h"
  27
  28 #include <gdk/gdk.h>
  29 #include <gtk/gtk.h>
  30 #include <gdk/gdkx.h>
  31
  32 #include <gdk/gdkimage.h>
  33
  34 extern void gdk_wx_draw_bitmap     (GdkDrawable  *drawable,
  35                           GdkGC               *gc,
  36                           GdkDrawable  *src,
  37                           gint                xsrc,
  38                           gint                ysrc,
  39                           gint                xdest,
  40                           gint                ydest,
  41                           gint                width,
  42                           gint                height);
  43
  44 //-----------------------------------------------------------------------------
  45 // data
  46 //-----------------------------------------------------------------------------
  47
  48 extern GtkWidget *wxGetRootWindow();
  49
  50 //-----------------------------------------------------------------------------
  51 // wxMask
  52 //-----------------------------------------------------------------------------
  53
  54 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  55
  56 wxMask::wxMask()
  57 {
  58     m_bitmap = (GdkBitmap *) NULL;
  59 }
  60
  61 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  62 {
  63     m_bitmap = (GdkBitmap *) NULL;
  64     Create( bitmap, colour );
  65 }
  66
  67 #if wxUSE_PALETTE
  68 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  69 {
  70     m_bitmap = (GdkBitmap *) NULL;
  71     Create( bitmap, paletteIndex );
  72 }
  73 #endif // wxUSE_PALETTE
  74
  75 wxMask::wxMask( const wxBitmap& bitmap )
  76 {
  77     m_bitmap = (GdkBitmap *) NULL;
  78     Create( bitmap );
  79 }
  80
  81 wxMask::~wxMask()
  82 {
  83     if (m_bitmap)
  84         g_object_unref (m_bitmap);
  85 }
  86
  87 bool wxMask::Create( const wxBitmap& bitmap,
  88                      const wxColour& colour )
  89 {
  90     if (m_bitmap)
  91     {
  92         g_object_unref (m_bitmap);
  93         m_bitmap = (GdkBitmap*) NULL;
  94     }
  95
  96     wxImage image = bitmap.ConvertToImage();
  97     if (!image.Ok()) return false;
  98
  99     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, image.GetWidth(), image.GetHeight(), 1 );
 100     GdkGC *gc = gdk_gc_new( m_bitmap );
 101
 102     GdkColor color;
 103     color.red = 65000;
 104     color.green = 65000;
 105     color.blue = 65000;
 106     color.pixel = 1;
 107     gdk_gc_set_foreground( gc, &color );
 108     gdk_gc_set_fill( gc, GDK_SOLID );
 109     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
 110
 111     unsigned char *data = image.GetData();
 112     int index = 0;
 113
 114     unsigned char red = colour.Red();
 115     unsigned char green = colour.Green();
 116     unsigned char blue = colour.Blue();
 117
 118     GdkVisual *visual = wxTheApp->GetGdkVisual();
 119
 120     int bpp = visual->depth;
 121     if ((bpp == 16) && (visual->red_mask != 0xf800))
 122         bpp = 15;
 123     if (bpp == 15)
 124     {
 125         red = red & 0xf8;
 126         green = green & 0xf8;
 127         blue = blue & 0xf8;
 128     }
 129     else if (bpp == 16)
 130     {
 131         red = red & 0xf8;
 132         green = green & 0xfc;
 133         blue = blue & 0xf8;
 134     }
 135     else if (bpp == 12)
 136     {
 137         red = red & 0xf0;
 138         green = green & 0xf0;
 139         blue = blue & 0xf0;
 140     }
 141
 142     color.red = 0;
 143     color.green = 0;
 144     color.blue = 0;
 145     color.pixel = 0;
 146     gdk_gc_set_foreground( gc, &color );
 147
 148     for (int j = 0; j < image.GetHeight(); j++)
 149     {
 150         int start_x = -1;
 151         int i;
 152         for (i = 0; i < image.GetWidth(); i++)
 153         {
 154             if ((data[index] == red) &&
 155                 (data[index+1] == green) &&
 156                 (data[index+2] == blue))
 157             {
 158                 if (start_x == -1)
 159                 start_x = i;
 160             }
 161             else
 162             {
 163                 if (start_x != -1)
 164                 {
 165                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 166                     start_x = -1;
 167                 }
 168             }
 169             index += 3;
 170         }
 171         if (start_x != -1)
 172             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 173     }
 174
 175     g_object_unref (gc);
 176
 177     return true;
 178 }
 179
 180 #if wxUSE_PALETTE
 181 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 182 {
 183     unsigned char r,g,b;
 184     wxPalette *pal = bitmap.GetPalette();
 185
 186     wxCHECK_MSG( pal, false, wxT("Cannot create mask from bitmap without palette") );
 187
 188     pal->GetRGB(paletteIndex, &r, &g, &b);
 189
 190     return Create(bitmap, wxColour(r, g, b));
 191 }
 192 #endif // wxUSE_PALETTE
 193
 194 bool wxMask::Create( const wxBitmap& bitmap )
 195 {
 196     if (m_bitmap)
 197     {
 198         g_object_unref (m_bitmap);
 199         m_bitmap = (GdkBitmap*) NULL;
 200     }
 201
 202     if (!bitmap.Ok()) return false;
 203
 204     wxCHECK_MSG( bitmap.GetDepth() == 1, false, wxT("Cannot create mask from colour bitmap") );
 205
 206     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 207
 208     if (!m_bitmap) return false;
 209
 210     GdkGC *gc = gdk_gc_new( m_bitmap );
 211
 212     gdk_wx_draw_bitmap( m_bitmap, gc, bitmap.GetPixmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
 213
 214     g_object_unref (gc);
 215
 216     return true;
 217 }
 218
 219 GdkBitmap *wxMask::GetBitmap() const
 220 {
 221     return m_bitmap;
 222 }
 223
 224 //-----------------------------------------------------------------------------
 225 // wxBitmap
 226 //-----------------------------------------------------------------------------
 227
 228 class wxBitmapRefData: public wxObjectRefData
 229 {
 230 public:
 231     wxBitmapRefData();
 232     ~wxBitmapRefData();
 233
 234     GdkPixmap      *m_pixmap;
 235     GdkPixbuf      *m_pixbuf;
 236     wxMask         *m_mask;
 237     int             m_width;
 238     int             m_height;
 239     int             m_bpp;
 240     wxPalette      *m_palette;
 241 };
 242
 243 wxBitmapRefData::wxBitmapRefData()
 244 {
 245     m_pixmap = (GdkPixmap *) NULL;
 246     m_pixbuf = (GdkPixbuf *) NULL;
 247     m_mask = (wxMask *) NULL;
 248     m_width = 0;
 249     m_height = 0;
 250     m_bpp = 0;
 251     m_palette = (wxPalette *) NULL;
 252 }
 253
 254 wxBitmapRefData::~wxBitmapRefData()
 255 {
 256     if (m_pixmap)
 257         g_object_unref (m_pixmap);
 258     if (m_pixbuf)
 259         g_object_unref (m_pixbuf);
 260     delete m_mask;
 261 #if wxUSE_PALETTE
 262     delete m_palette;
 263 #endif // wxUSE_PALETTE
 264 }
 265
 266 //-----------------------------------------------------------------------------
 267
 268 #define M_BMPDATA wx_static_cast(wxBitmapRefData*, m_refData)
 269
 270 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 271
 272 wxBitmap::wxBitmap()
 273 {
 274 }
 275
 276 wxBitmap::wxBitmap( int width, int height, int depth )
 277 {
 278     Create( width, height, depth );
 279 }
 280
 281 bool wxBitmap::Create( int width, int height, int depth )
 282 {
 283     UnRef();
 284
 285     if ( width <= 0 || height <= 0 )
 286     {
 287         return false;
 288     }
 289
 290     GdkVisual *visual = wxTheApp->GetGdkVisual();
 291
 292     if (depth == -1)
 293         depth = visual->depth;
 294
 295     wxCHECK_MSG( (depth == visual->depth) || (depth == 1) || (depth == 32), false,
 296                     wxT("invalid bitmap depth") );
 297
 298     m_refData = new wxBitmapRefData();
 299     M_BMPDATA->m_mask = (wxMask *) NULL;
 300     M_BMPDATA->m_width = width;
 301     M_BMPDATA->m_height = height;
 302     M_BMPDATA->m_bpp = depth;
 303     if (depth == 32)
 304     {
 305         M_BMPDATA->m_pixbuf = gdk_pixbuf_new( GDK_COLORSPACE_RGB, true,
 306                                               8, width, height);
 307     }
 308     else
 309     {
 310         M_BMPDATA->m_pixmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, depth );
 311     }
 312
 313     return Ok();
 314 }
 315
 316 bool wxBitmap::CreateFromXpm( const char **bits )
 317 {
 318     UnRef();
 319
 320     wxCHECK_MSG( bits != NULL, false, wxT("invalid bitmap data") );
 321
 322     GdkVisual *visual = wxTheApp->GetGdkVisual();
 323
 324     m_refData = new wxBitmapRefData();
 325
 326     GdkBitmap *mask = (GdkBitmap*) NULL;
 327
 328     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxGetRootWindow()->window, &mask, NULL, (gchar **) bits );
 329
 330     wxCHECK_MSG( M_BMPDATA->m_pixmap, false, wxT("couldn't create pixmap") );
 331
 332     if (mask)
 333     {
 334         M_BMPDATA->m_mask = new wxMask();
 335         M_BMPDATA->m_mask->m_bitmap = mask;
 336     }
 337
 338     gdk_drawable_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 339
 340     M_BMPDATA->m_bpp = visual->depth;  // Can we get a different depth from create_from_xpm_d() ?
 341
 342     return true;
 343 }
 344
 345 wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
 346 {
 347     wxCHECK_MSG( Ok(), wxNullBitmap, wxT("invalid bitmap") );
 348
 349     if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 350         return *this;
 351
 352     int width = wxMax(newx, 1);
 353     int height = wxMax(newy, 1);
 354     width = wxMin(width, clipwidth);
 355     height = wxMin(height, clipheight);
 356
 357     wxBitmap bmp;
 358
 359     if (HasPixbuf())
 360     {
 361         bmp.SetWidth(width);
 362         bmp.SetHeight(height);
 363         bmp.SetDepth(GetDepth());
 364         bmp.SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 365                                      gdk_pixbuf_get_has_alpha(GetPixbuf()),
 366                                      8, width, height));
 367         gdk_pixbuf_scale(GetPixbuf(), bmp.GetPixbuf(),
 368                          0, 0, width, height,
 369                          clipx, clipy,
 370                          (double)newx/GetWidth(), (double)newy/GetHeight(),
 371                          GDK_INTERP_BILINEAR);
 372     }
 373     else
 374     {
 375         GdkImage *img = (GdkImage*) NULL;
 376         if (GetPixmap())
 377             img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
 378         else
 379             wxFAIL_MSG( wxT("Ill-formed bitmap") );
 380
 381         wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
 382
 383         int bpp = -1;
 384
 385
 386         GdkGC *gc = NULL;
 387         GdkPixmap *dstpix = NULL;
 388         if (GetDepth() != 1)
 389         {
 390             GdkVisual *visual = gdk_drawable_get_visual( GetPixmap() );
 391             if (visual == NULL)
 392                 visual = wxTheApp->GetGdkVisual();
 393
 394             bpp = visual->depth;
 395             bmp = wxBitmap(width,height,bpp);
 396             dstpix = bmp.GetPixmap();
 397             gc = gdk_gc_new( dstpix );
 398         }
 399
 400         char *dst = NULL;
 401         long dstbyteperline = 0;
 402
 403         if (GetDepth() == 1)
 404         {
 405             bpp = 1;
 406             dstbyteperline = width/8*M_BMPDATA->m_bpp;
 407             if (width*M_BMPDATA->m_bpp % 8 != 0)
 408                 dstbyteperline++;
 409             dst = (char*) malloc(dstbyteperline*height);
 410         }
 411
 412         // be careful to use the right scaling factor
 413         float scx = (float)M_BMPDATA->m_width/(float)newx;
 414         float scy = (float)M_BMPDATA->m_height/(float)newy;
 415         // prepare accel-tables
 416         int *tablex = (int *)calloc(width,sizeof(int));
 417         int *tabley = (int *)calloc(height,sizeof(int));
 418
 419         // accel table filled with clipped values
 420         for (int x = 0; x < width; x++)
 421             tablex[x] = (int) (scx * (x+clipx));
 422         for (int y = 0; y < height; y++)
 423             tabley[y] = (int) (scy * (y+clipy));
 424
 425         // Main rescaling routine starts here
 426         for (int h = 0; h < height; h++)
 427         {
 428             char outbyte = 0;
 429             int old_x = -1;
 430             guint32 old_pixval = 0;
 431
 432             for (int w = 0; w < width; w++)
 433             {
 434                 guint32 pixval;
 435                 int x = tablex[w];
 436                 if (x == old_x)
 437                     pixval = old_pixval;
 438                 else
 439                 {
 440                     pixval = gdk_image_get_pixel( img, x, tabley[h] );
 441                     old_pixval = pixval;
 442                     old_x = x;
 443                 }
 444
 445                 if ( dst )
 446                 {
 447                     if (pixval)
 448                     {
 449                         char bit=1;
 450                         char shift = bit << (w % 8);
 451                         outbyte |= shift;
 452                     }
 453
 454                     if ((w+1)%8==0)
 455                     {
 456                         dst[h*dstbyteperline+w/8] = outbyte;
 457                         outbyte = 0;
 458                     }
 459                 }
 460                 else
 461                 {
 462                     GdkColor col;
 463                     col.pixel = pixval;
 464                     gdk_gc_set_foreground( gc, &col );
 465                     gdk_draw_point( dstpix, gc, w, h);
 466                 }
 467             }
 468
 469             // do not forget the last byte
 470             if ( dst && (width % 8 != 0) )
 471                 dst[h*dstbyteperline+width/8] = outbyte;
 472         }
 473
 474         g_object_unref (img);
 475         if (gc) g_object_unref (gc);
 476
 477         if ( dst )
 478         {
 479             bmp = wxBitmap( (const char *)dst, width, height, 1 );
 480             free( dst );
 481         }
 482
 483         if (GetMask())
 484         {
 485             dstbyteperline = width/8;
 486             if (width % 8 != 0)
 487                 dstbyteperline++;
 488             dst = (char*) malloc(dstbyteperline*height);
 489             img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 490
 491             for (int h = 0; h < height; h++)
 492             {
 493                 char outbyte = 0;
 494                 int old_x = -1;
 495                 guint32 old_pixval = 0;
 496
 497                 for (int w = 0; w < width; w++)
 498                 {
 499                     guint32 pixval;
 500                     int x = tablex[w];
 501                     if (x == old_x)
 502                         pixval = old_pixval;
 503                     else
 504                     {
 505                         pixval = gdk_image_get_pixel( img, x, tabley[h] );
 506                         old_pixval = pixval;
 507                         old_x = x;
 508                     }
 509
 510                     if (pixval)
 511                     {
 512                         char bit=1;
 513                         char shift = bit << (w % 8);
 514                         outbyte |= shift;
 515                     }
 516
 517                     if ((w+1)%8 == 0)
 518                     {
 519                         dst[h*dstbyteperline+w/8] = outbyte;
 520                         outbyte = 0;
 521                     }
 522                 }
 523
 524                 // do not forget the last byte
 525                 if (width % 8 != 0)
 526                     dst[h*dstbyteperline+width/8] = outbyte;
 527             }
 528             wxMask* mask = new wxMask;
 529             mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
 530             bmp.SetMask(mask);
 531
 532             free( dst );
 533             g_object_unref (img);
 534         }
 535
 536         free( tablex );
 537         free( tabley );
 538     }
 539
 540     return bmp;
 541 }
 542
 543 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 544 {
 545     UnRef();
 546
 547     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 548     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 549
 550     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 551         return false;
 552
 553     m_refData = new wxBitmapRefData();
 554
 555     if (depth == 1)
 556     {
 557         return CreateFromImageAsBitmap(image);
 558     }
 559     else
 560     {
 561         if (image.HasAlpha())
 562             return CreateFromImageAsPixbuf(image);
 563
 564         return CreateFromImageAsPixmap(image);
 565     }
 566 }
 567
 568 // conversion to mono bitmap:
 569 bool wxBitmap::CreateFromImageAsBitmap(const wxImage& img)
 570 {
 571     // convert alpha channel to mask, if it is present:
 572     wxImage image(img);
 573     image.ConvertAlphaToMask();
 574
 575     int width = image.GetWidth();
 576     int height = image.GetHeight();
 577
 578     SetHeight( height );
 579     SetWidth( width );
 580
 581     SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 582
 583     SetDepth( 1 );
 584
 585     // Create picture image
 586
 587     GdkGC* data_gc = gdk_gc_new(M_BMPDATA->m_pixmap);
 588     GdkColor color;
 589     color.pixel = 1;
 590     gdk_gc_set_foreground(data_gc, &color);
 591     gdk_draw_rectangle(M_BMPDATA->m_pixmap, data_gc, true, 0, 0, width, height);
 592     GdkImage* data_image = gdk_drawable_get_image(M_BMPDATA->m_pixmap, 0, 0, width, height);
 593
 594     // Create mask image
 595
 596     GdkImage *mask_image = (GdkImage*) NULL;
 597     GdkGC* mask_gc = NULL;
 598
 599     if (image.HasMask())
 600     {
 601         wxMask *mask = new wxMask();
 602         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 603         mask_gc = gdk_gc_new(mask->m_bitmap);
 604         gdk_gc_set_foreground(mask_gc, &color);
 605         gdk_draw_rectangle(mask->m_bitmap, mask_gc, true, 0, 0, width, height);
 606         mask_image = gdk_drawable_get_image(mask->m_bitmap, 0, 0, width, height);
 607
 608         SetMask( mask );
 609     }
 610
 611     int r_mask = image.GetMaskRed();
 612     int g_mask = image.GetMaskGreen();
 613     int b_mask = image.GetMaskBlue();
 614
 615     unsigned char* data = image.GetData();
 616
 617     int index = 0;
 618     for (int y = 0; y < height; y++)
 619     {
 620         for (int x = 0; x < width; x++)
 621         {
 622             int r = data[index];
 623             index++;
 624             int g = data[index];
 625             index++;
 626             int b = data[index];
 627             index++;
 628
 629             if (mask_image != NULL)
 630             {
 631                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 632                     gdk_image_put_pixel( mask_image, x, y, 0 );
 633             }
 634
 635             if ((r == 255) && (b == 255) && (g == 255))
 636                 gdk_image_put_pixel( data_image, x, y, 0 );
 637
 638         } // for
 639     }  // for
 640
 641     // Blit picture
 642
 643     gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 644
 645     g_object_unref (data_image);
 646     g_object_unref (data_gc);
 647
 648     // Blit mask
 649
 650     if (mask_image != NULL)
 651     {
 652         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 653
 654         g_object_unref (mask_image);
 655         g_object_unref (mask_gc);
 656     }
 657
 658     return true;
 659 }
 660
 661 // conversion to colour bitmap:
 662 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& img)
 663 {
 664     // convert alpha channel to mask, if it is present:
 665     wxImage image(img);
 666     image.ConvertAlphaToMask();
 667
 668     int width = image.GetWidth();
 669     int height = image.GetHeight();
 670
 671     SetHeight( height );
 672     SetWidth( width );
 673
 674     SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 675
 676     GdkVisual *visual = wxTheApp->GetGdkVisual();
 677
 678     int bpp = visual->depth;
 679
 680     SetDepth( bpp );
 681
 682     GdkGC *gc = gdk_gc_new( GetPixmap() );
 683
 684     gdk_draw_rgb_image( GetPixmap(),
 685                         gc,
 686                         0, 0,
 687                         width, height,
 688                         GDK_RGB_DITHER_NONE,
 689                         image.GetData(),
 690                         width*3 );
 691
 692     g_object_unref (gc);
 693
 694     // Create mask image
 695
 696     if (!image.HasMask())
 697         return true;
 698
 699     wxMask *mask = new wxMask();
 700     mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 701     GdkGC* mask_gc = gdk_gc_new(mask->m_bitmap);
 702     GdkColor color;
 703     color.pixel = 1;
 704     gdk_gc_set_foreground(mask_gc, &color);
 705     gdk_draw_rectangle(mask->m_bitmap, mask_gc, true, 0, 0, width, height);
 706     GdkImage* mask_image = gdk_drawable_get_image(mask->m_bitmap, 0, 0, width, height);
 707
 708     SetMask( mask );
 709
 710     int r_mask = image.GetMaskRed();
 711     int g_mask = image.GetMaskGreen();
 712     int b_mask = image.GetMaskBlue();
 713
 714     unsigned char* data = image.GetData();
 715
 716     int index = 0;
 717     for (int y = 0; y < height; y++)
 718     {
 719         for (int x = 0; x < width; x++)
 720         {
 721             int r = data[index];
 722             index++;
 723             int g = data[index];
 724             index++;
 725             int b = data[index];
 726             index++;
 727
 728             if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 729                 gdk_image_put_pixel( mask_image, x, y, 0 );
 730         } // for
 731     }  // for
 732
 733     // Blit mask
 734
 735     gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 736
 737     g_object_unref (mask_image);
 738     g_object_unref (mask_gc);
 739
 740     return true;
 741 }
 742
 743 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 744 {
 745     int width = image.GetWidth();
 746     int height = image.GetHeight();
 747
 748     GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 749                                        image.HasAlpha(),
 750                                        8 /* bits per sample */,
 751                                        width, height);
 752     if (!pixbuf)
 753         return false;
 754
 755     wxASSERT( image.HasAlpha() ); // for now
 756     wxASSERT( gdk_pixbuf_get_n_channels(pixbuf) == 4 );
 757     wxASSERT( gdk_pixbuf_get_width(pixbuf) == width );
 758     wxASSERT( gdk_pixbuf_get_height(pixbuf) == height );
 759
 760     M_BMPDATA->m_pixbuf = pixbuf;
 761     SetHeight(height);
 762     SetWidth(width);
 763     SetDepth(wxTheApp->GetGdkVisual()->depth);
 764
 765     // Copy the data:
 766     unsigned char *in = image.GetData();
 767     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 768     unsigned char *alpha = image.GetAlpha();
 769
 770     int rowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 771
 772     for (int y = 0; y < height; y++, out += rowinc)
 773     {
 774         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 775         {
 776             out[0] = in[0];
 777             out[1] = in[1];
 778             out[2] = in[2];
 779             out[3] = *alpha;
 780         }
 781     }
 782
 783     return true;
 784 }
 785
 786 wxImage wxBitmap::ConvertToImage() const
 787 {
 788     wxImage image;
 789
 790     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 791
 792     image.Create(GetWidth(), GetHeight());
 793     unsigned char *data = image.GetData();
 794
 795     if (!data)
 796     {
 797         wxFAIL_MSG( wxT("couldn't create image") );
 798         return wxNullImage;
 799     }
 800
 801     if (HasPixbuf())
 802     {
 803         GdkPixbuf *pixbuf = GetPixbuf();
 804         wxASSERT( gdk_pixbuf_get_has_alpha(pixbuf) );
 805
 806         int w = GetWidth();
 807         int h = GetHeight();
 808
 809         image.SetAlpha();
 810
 811         unsigned char *alpha = image.GetAlpha();
 812         unsigned char *in = gdk_pixbuf_get_pixels(pixbuf);
 813         unsigned char *out = data;
 814         int rowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * w;
 815
 816         for (int y = 0; y < h; y++, in += rowinc)
 817         {
 818             for (int x = 0; x < w; x++, in += 4, out += 3, alpha++)
 819             {
 820                 out[0] = in[0];
 821                 out[1] = in[1];
 822                 out[2] = in[2];
 823                 *alpha = in[3];
 824             }
 825         }
 826     }
 827     else
 828     {
 829         // the colour used as transparent one in wxImage and the one it is
 830         // replaced with when it really occurs in the bitmap
 831         static const int MASK_RED = 1;
 832         static const int MASK_GREEN = 2;
 833         static const int MASK_BLUE = 3;
 834         static const int MASK_BLUE_REPLACEMENT = 2;
 835
 836         GdkImage *gdk_image = (GdkImage*) NULL;
 837
 838         if (HasPixmap())
 839         {
 840             gdk_image = gdk_image_get( GetPixmap(),
 841                                        0, 0,
 842                                        GetWidth(), GetHeight() );
 843         }
 844         else
 845         {
 846             wxFAIL_MSG( wxT("Ill-formed bitmap") );
 847         }
 848
 849         wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
 850
 851         GdkImage *gdk_image_mask = (GdkImage*) NULL;
 852         if (GetMask())
 853         {
 854             gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
 855                                             0, 0,
 856                                             GetWidth(), GetHeight() );
 857
 858             image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
 859         }
 860
 861         int bpp = -1;
 862         int red_shift_right = 0;
 863         int green_shift_right = 0;
 864         int blue_shift_right = 0;
 865         int red_shift_left = 0;
 866         int green_shift_left = 0;
 867         int blue_shift_left = 0;
 868         bool use_shift = false;
 869
 870         if (GetDepth() != 1)
 871         {
 872             GdkVisual *visual = gdk_drawable_get_visual( GetPixmap() );
 873             if (visual == NULL)
 874                 visual = wxTheApp->GetGdkVisual();
 875
 876             bpp = visual->depth;
 877             if (bpp == 16)
 878                 bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
 879             red_shift_right = visual->red_shift;
 880             red_shift_left = 8-visual->red_prec;
 881             green_shift_right = visual->green_shift;
 882             green_shift_left = 8-visual->green_prec;
 883             blue_shift_right = visual->blue_shift;
 884             blue_shift_left = 8-visual->blue_prec;
 885
 886             use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
 887         }
 888         else
 889         {
 890             bpp = 1;
 891         }
 892
 893
 894         GdkColormap *cmap = gtk_widget_get_default_colormap();
 895
 896         long pos = 0;
 897         for (int j = 0; j < GetHeight(); j++)
 898         {
 899             for (int i = 0; i < GetWidth(); i++)
 900             {
 901                 wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
 902                 if (bpp == 1)
 903                 {
 904                     if (pixel == 0)
 905                     {
 906                         data[pos]   = 0;
 907                         data[pos+1] = 0;
 908                         data[pos+2] = 0;
 909                     }
 910                     else
 911                     {
 912                         data[pos]   = 255;
 913                         data[pos+1] = 255;
 914                         data[pos+2] = 255;
 915                     }
 916                 }
 917                 else if (use_shift)
 918                 {
 919                     data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
 920                     data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
 921                     data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
 922                 }
 923                 else if (cmap->colors)
 924                 {
 925                     data[pos] =   cmap->colors[pixel].red   >> 8;
 926                     data[pos+1] = cmap->colors[pixel].green >> 8;
 927                     data[pos+2] = cmap->colors[pixel].blue  >> 8;
 928                 }
 929                 else
 930                 {
 931                     wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
 932                 }
 933
 934                 if (gdk_image_mask)
 935                 {
 936                     int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
 937                     if (mask_pixel == 0)
 938                     {
 939                         data[pos] = MASK_RED;
 940                         data[pos+1] = MASK_GREEN;
 941                         data[pos+2] = MASK_BLUE;
 942                     }
 943                     else if ( data[pos] == MASK_RED &&
 944                                 data[pos+1] == MASK_GREEN &&
 945                                     data[pos+2] == MASK_BLUE )
 946                     {
 947                         data[pos+2] = MASK_BLUE_REPLACEMENT;
 948                     }
 949                 }
 950
 951                 pos += 3;
 952             }
 953         }
 954
 955         g_object_unref (gdk_image);
 956         if (gdk_image_mask) g_object_unref (gdk_image_mask);
 957     }
 958
 959     return image;
 960 }
 961
 962 wxBitmap::wxBitmap( const wxString &filename, wxBitmapType type )
 963 {
 964     LoadFile( filename, type );
 965 }
 966
 967 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
 968 {
 969     if ( width > 0 && height > 0 )
 970     {
 971         m_refData = new wxBitmapRefData();
 972
 973         M_BMPDATA->m_mask = (wxMask *) NULL;
 974         M_BMPDATA->m_pixmap = gdk_bitmap_create_from_data
 975                               (
 976                                 wxGetRootWindow()->window,
 977                                 (gchar *) bits,
 978                                 width,
 979                                 height
 980                               );
 981         M_BMPDATA->m_width = width;
 982         M_BMPDATA->m_height = height;
 983         M_BMPDATA->m_bpp = 1;
 984
 985         wxASSERT_MSG( M_BMPDATA->m_pixmap, wxT("couldn't create bitmap") );
 986     }
 987 }
 988
 989 wxBitmap::~wxBitmap()
 990 {
 991 }
 992
 993 bool wxBitmap::operator == ( const wxBitmap& bmp ) const
 994 {
 995     return m_refData == bmp.m_refData;
 996 }
 997
 998 bool wxBitmap::operator != ( const wxBitmap& bmp ) const
 999 {
1000     return m_refData != bmp.m_refData;
1001 }
1002
1003 bool wxBitmap::Ok() const
1004 {
1005     return (m_refData != NULL) &&
1006            (
1007               M_BMPDATA->m_pixbuf ||
1008               M_BMPDATA->m_pixmap
1009            );
1010 }
1011
1012 int wxBitmap::GetHeight() const
1013 {
1014     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1015
1016     return M_BMPDATA->m_height;
1017 }
1018
1019 int wxBitmap::GetWidth() const
1020 {
1021     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1022
1023     return M_BMPDATA->m_width;
1024 }
1025
1026 int wxBitmap::GetDepth() const
1027 {
1028     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1029
1030     return M_BMPDATA->m_bpp;
1031 }
1032
1033 wxMask *wxBitmap::GetMask() const
1034 {
1035     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1036
1037     return M_BMPDATA->m_mask;
1038 }
1039
1040 void wxBitmap::SetMask( wxMask *mask )
1041 {
1042     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
1043
1044     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
1045
1046     M_BMPDATA->m_mask = mask;
1047 }
1048
1049 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
1050 {
1051     *this = icon;
1052     return true;
1053 }
1054
1055 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1056 {
1057     wxCHECK_MSG( Ok() &&
1058                  (rect.x >= 0) && (rect.y >= 0) &&
1059                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
1060                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1061
1062     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
1063     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1064
1065     if (HasPixbuf())
1066     {
1067         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
1068                                            gdk_pixbuf_get_has_alpha(GetPixbuf()),
1069                                            8, rect.width, rect.height);
1070         ret.SetPixbuf(pixbuf);
1071         gdk_pixbuf_copy_area(GetPixbuf(),
1072                              rect.x, rect.y, rect.width, rect.height,
1073                              pixbuf, 0, 0);
1074     }
1075     else
1076     {
1077         if (ret.GetDepth() != 1)
1078         {
1079             GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1080             gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1081             g_object_unref (gc);
1082         }
1083         else
1084         {
1085             GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1086             GdkColor col;
1087             col.pixel = 0xFFFFFF;
1088             gdk_gc_set_foreground( gc, &col );
1089             col.pixel = 0;
1090             gdk_gc_set_background( gc, &col );
1091             gdk_wx_draw_bitmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1092             g_object_unref (gc);
1093         }
1094     }
1095
1096     if (GetMask())
1097     {
1098         wxMask *mask = new wxMask;
1099         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
1100
1101         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
1102         GdkColor col;
1103         col.pixel = 0xFFFFFF;
1104         gdk_gc_set_foreground( gc, &col );
1105         col.pixel = 0;
1106         gdk_gc_set_background( gc, &col );
1107         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height );
1108         g_object_unref (gc);
1109
1110         ret.SetMask( mask );
1111     }
1112
1113     return ret;
1114 }
1115
1116 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
1117 {
1118     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1119
1120     // Try to save the bitmap via wxImage handlers:
1121     {
1122         wxImage image = ConvertToImage();
1123         if (image.Ok()) return image.SaveFile( name, type );
1124     }
1125
1126     return false;
1127 }
1128
1129 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
1130 {
1131     UnRef();
1132
1133     if (!wxFileExists(name))
1134         return false;
1135
1136     GdkVisual *visual = wxTheApp->GetGdkVisual();
1137
1138     if (type == wxBITMAP_TYPE_XPM)
1139     {
1140         m_refData = new wxBitmapRefData();
1141
1142         GdkBitmap *mask = (GdkBitmap*) NULL;
1143
1144         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
1145                               (
1146                                 wxGetRootWindow()->window,
1147                                 &mask,
1148                                 NULL,
1149                                 name.fn_str()
1150                               );
1151
1152         if (mask)
1153         {
1154            M_BMPDATA->m_mask = new wxMask();
1155            M_BMPDATA->m_mask->m_bitmap = mask;
1156         }
1157
1158         gdk_drawable_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
1159
1160         M_BMPDATA->m_bpp = visual->depth;
1161     }
1162     else // try if wxImage can load it
1163     {
1164         wxImage image;
1165         if ( !image.LoadFile( name, type ) || !image.Ok() )
1166             return false;
1167
1168         *this = wxBitmap(image);
1169     }
1170
1171     return true;
1172 }
1173
1174 #if wxUSE_PALETTE
1175 wxPalette *wxBitmap::GetPalette() const
1176 {
1177     if (!Ok())
1178         return (wxPalette *) NULL;
1179
1180     return M_BMPDATA->m_palette;
1181 }
1182
1183 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
1184 {
1185     // TODO
1186 }
1187 #endif // wxUSE_PALETTE
1188
1189 void wxBitmap::SetHeight( int height )
1190 {
1191     if (!m_refData)
1192         m_refData = new wxBitmapRefData();
1193
1194     M_BMPDATA->m_height = height;
1195 }
1196
1197 void wxBitmap::SetWidth( int width )
1198 {
1199     if (!m_refData)
1200         m_refData = new wxBitmapRefData();
1201
1202     M_BMPDATA->m_width = width;
1203 }
1204
1205 void wxBitmap::SetDepth( int depth )
1206 {
1207     if (!m_refData)
1208         m_refData = new wxBitmapRefData();
1209
1210     M_BMPDATA->m_bpp = depth;
1211 }
1212
1213 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1214 {
1215     if (!m_refData)
1216         m_refData = new wxBitmapRefData();
1217
1218     M_BMPDATA->m_pixmap = pixmap;
1219     PurgeOtherRepresentations(Pixmap);
1220 }
1221
1222 GdkPixmap *wxBitmap::GetPixmap() const
1223 {
1224     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
1225
1226     // create the pixmap on the fly if we use Pixbuf representation:
1227     if (HasPixbuf() && !HasPixmap())
1228     {
1229         delete M_BMPDATA->m_mask;
1230         M_BMPDATA->m_mask = new wxMask();
1231         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
1232                                           &M_BMPDATA->m_pixmap,
1233                                           &M_BMPDATA->m_mask->m_bitmap,
1234                                           128 /*threshold*/);
1235     }
1236
1237     return M_BMPDATA->m_pixmap;
1238 }
1239
1240 bool wxBitmap::HasPixmap() const
1241 {
1242     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1243
1244     return M_BMPDATA->m_pixmap != NULL;
1245 }
1246
1247 GdkPixbuf *wxBitmap::GetPixbuf() const
1248 {
1249     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
1250
1251     if (HasPixmap() && !HasPixbuf())
1252     {
1253         int width = GetWidth();
1254         int height = GetHeight();
1255
1256         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
1257                                            GetMask() != NULL,
1258                                            8, width, height);
1259         M_BMPDATA->m_pixbuf =
1260             gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
1261                                          0, 0, 0, 0, width, height);
1262
1263         // apply the mask to created pixbuf:
1264         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
1265         {
1266             GdkPixbuf *pmask =
1267                 gdk_pixbuf_get_from_drawable(NULL,
1268                                              M_BMPDATA->m_mask->GetBitmap(),
1269                                              NULL,
1270                                              0, 0, 0, 0, width, height);
1271             if (pmask)
1272             {
1273                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
1274                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
1275                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
1276                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
1277
1278                 for (int y = 0; y < height;
1279                      y++, bmp += bmprowinc, mask += maskrowinc)
1280                 {
1281                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
1282                     {
1283                         if (mask[0] == 0 /*black pixel*/)
1284                             bmp[3] = 0;
1285                     }
1286                 }
1287
1288                 g_object_unref (pmask);
1289             }
1290         }
1291     }
1292
1293     return M_BMPDATA->m_pixbuf;
1294 }
1295
1296 bool wxBitmap::HasPixbuf() const
1297 {
1298     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1299
1300     return M_BMPDATA->m_pixbuf != NULL;
1301 }
1302
1303 void wxBitmap::SetPixbuf( GdkPixbuf *pixbuf )
1304 {
1305     if (!m_refData)
1306         m_refData = new wxBitmapRefData();
1307
1308     M_BMPDATA->m_pixbuf = pixbuf;
1309     PurgeOtherRepresentations(Pixbuf);
1310 }
1311
1312 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
1313 {
1314     if (keep == Pixmap && HasPixbuf())
1315     {
1316         g_object_unref (M_BMPDATA->m_pixbuf);
1317         M_BMPDATA->m_pixbuf = NULL;
1318     }
1319     if (keep == Pixbuf && HasPixmap())
1320     {
1321         g_object_unref (M_BMPDATA->m_pixmap);
1322         M_BMPDATA->m_pixmap = NULL;
1323     }
1324 }
1325
1326 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1327 {
1328     if (bpp != 32)
1329         return NULL;
1330
1331     GdkPixbuf *pixbuf = GetPixbuf();
1332     if (!pixbuf)
1333         return NULL;
1334
1335 #if 0
1336     if (gdk_pixbuf_get_has_alpha( pixbuf ))
1337         wxPrintf( wxT("Has alpha\n") );
1338     else
1339         wxPrintf( wxT("No alpha.\n") );
1340 #endif
1341
1342     data.m_height = gdk_pixbuf_get_height( pixbuf );
1343     data.m_width = gdk_pixbuf_get_width( pixbuf );
1344     data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
1345
1346     return gdk_pixbuf_get_pixels( pixbuf );
1347 }
1348
1349 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
1350 {
1351 }
1352
1353
1354 bool wxBitmap::HasAlpha() const
1355 {
1356     return HasPixbuf();
1357 }
1358
1359 void wxBitmap::UseAlpha()
1360 {
1361     GetPixbuf();
1362 }
1363
1364 //-----------------------------------------------------------------------------
1365 // wxBitmapHandler
1366 //-----------------------------------------------------------------------------
1367
1368 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler,wxBitmapHandlerBase)
1369
1370 wxBitmapHandler::~wxBitmapHandler()
1371 {
1372 }
1373
1374 bool wxBitmapHandler::Create(wxBitmap * WXUNUSED(bitmap),
1375                              void * WXUNUSED(data),
1376                              long WXUNUSED(type),
1377                              int WXUNUSED(width),
1378                              int WXUNUSED(height),
1379                              int WXUNUSED(depth))
1380 {
1381     wxFAIL_MSG( _T("not implemented") );
1382
1383     return false;
1384 }
1385
1386 bool wxBitmapHandler::LoadFile(wxBitmap * WXUNUSED(bitmap),
1387                                const wxString& WXUNUSED(name),
1388                                long WXUNUSED(flags),
1389                                int WXUNUSED(desiredWidth),
1390                                int WXUNUSED(desiredHeight))
1391 {
1392     wxFAIL_MSG( _T("not implemented") );
1393
1394     return false;
1395 }
1396
1397 bool wxBitmapHandler::SaveFile(const wxBitmap * WXUNUSED(bitmap),
1398                                const wxString& WXUNUSED(name),
1399                                int WXUNUSED(type),
1400                                const wxPalette * WXUNUSED(palette))
1401 {
1402     wxFAIL_MSG( _T("not implemented") );
1403
1404     return false;
1405 }
1406
1407 /* static */ void wxBitmap::InitStandardHandlers()
1408 {
1409     // TODO: Insert handler based on GdkPixbufs handler later
1410 }