src/gtk1/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/bitmap.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Copyright:   (c) 1998 Robert Roebling
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 // For compilers that support precompilation, includes "wx.h".
  10 #include "wx/wxprec.h"
  11
  12 #include "wx/bitmap.h"
  13
  14 #ifndef WX_PRECOMP
  15     #include "wx/app.h"
  16     #include "wx/dcmemory.h"
  17     #include "wx/palette.h"
  18     #include "wx/icon.h"
  19     #include "wx/math.h"
  20     #include "wx/image.h"
  21 #endif // WX_PRECOMP
  22
  23 #include "wx/filefn.h"
  24
  25 #include <gdk/gdk.h>
  26 #include <gtk/gtk.h>
  27 #include <gdk/gdkx.h>
  28
  29 #include <gdk/gdkrgb.h>
  30
  31 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 = NULL;
  57 }
  58
  59 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  60 {
  61     m_bitmap = NULL;
  62     Create( bitmap, colour );
  63 }
  64
  65 #if wxUSE_PALETTE
  66 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  67 {
  68     m_bitmap = NULL;
  69     Create( bitmap, paletteIndex );
  70 }
  71 #endif // wxUSE_PALETTE
  72
  73 wxMask::wxMask( const wxBitmap& bitmap )
  74 {
  75     m_bitmap = 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 = NULL;
  92     }
  93
  94     wxImage image = bitmap.ConvertToImage();
  95     if (!image.IsOk()) 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 = NULL;
 198     }
 199
 200     if (!bitmap.IsOk()) 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 //-----------------------------------------------------------------------------
 224 // wxBitmapRefData
 225 //-----------------------------------------------------------------------------
 226
 227 class wxBitmapRefData : public wxGDIRefData
 228 {
 229 public:
 230     wxBitmapRefData();
 231     wxBitmapRefData(const wxBitmapRefData& data);
 232     bool Create(int width, int height, int bpp);
 233     virtual ~wxBitmapRefData();
 234
 235     virtual bool IsOk() const { return m_pixmap || m_bitmap; }
 236
 237     GdkPixmap      *m_pixmap;
 238     GdkBitmap      *m_bitmap;
 239     wxMask         *m_mask;
 240     int             m_width;
 241     int             m_height;
 242     int             m_bpp;
 243 #if wxUSE_PALETTE
 244     wxPalette      *m_palette;
 245 #endif // wxUSE_PALETTE
 246 };
 247
 248 wxBitmapRefData::wxBitmapRefData()
 249 {
 250     m_pixmap = NULL;
 251     m_bitmap = NULL;
 252     m_mask = NULL;
 253     m_width = 0;
 254     m_height = 0;
 255     m_bpp = 0;
 256 #if wxUSE_PALETTE
 257     m_palette = NULL;
 258 #endif // wxUSE_PALETTE
 259 }
 260
 261 wxBitmapRefData::wxBitmapRefData(const wxBitmapRefData& data)
 262 {
 263     Create(data.m_width, data.m_height, data.m_bpp);
 264
 265     m_mask = data.m_mask ? new wxMask(*data.m_mask) : NULL;
 266
 267 #if wxUSE_PALETTE
 268     wxASSERT_MSG( !data.m_palette,
 269                   wxT("copying bitmaps palette not implemented") );
 270 #endif // wxUSE_PALETTE
 271
 272
 273     // copy the bitmap data by simply drawing the source bitmap on this one
 274     GdkPixmap **dst;
 275     if ( data.m_pixmap )
 276     {
 277         dst = &m_pixmap;
 278     }
 279     else if ( data.m_bitmap )
 280     {
 281         dst = &m_bitmap;
 282     }
 283     else // invalid bitmap?
 284     {
 285         return;
 286     }
 287
 288     GdkGC *gc = gdk_gc_new(*dst);
 289     if ( m_bpp == 1 )
 290     {
 291         gdk_wx_draw_bitmap(m_bitmap, gc, data.m_bitmap, 0, 0, 0, 0, -1, -1);
 292     }
 293     else // colour pixmap
 294     {
 295         gdk_draw_pixmap(m_pixmap, gc, data.m_pixmap, 0, 0, 0, 0, -1, -1);
 296     }
 297
 298     gdk_gc_unref(gc);
 299 }
 300
 301 bool wxBitmapRefData::Create(int width, int height, int bpp)
 302 {
 303     m_width = width;
 304     m_height = height;
 305     m_bpp = bpp;
 306
 307     m_mask = NULL;
 308 #if wxUSE_PALETTE
 309     m_palette = NULL;
 310 #endif
 311
 312     // to understand how this compiles you should know that GdkPixmap and
 313     // GdkBitmap are one and the same type in GTK+ 1
 314     GdkPixmap **ppix;
 315     if ( m_bpp != 1 )
 316     {
 317         const GdkVisual * const visual = wxTheApp->GetGdkVisual();
 318
 319         wxCHECK_MSG( (bpp == -1) || (bpp == visual->depth) || (bpp == 32), false,
 320                         wxT("invalid bitmap depth") );
 321
 322         m_bpp = visual->depth;
 323
 324         ppix = &m_pixmap;
 325         m_bitmap = NULL;
 326     }
 327     else // mono bitmap
 328     {
 329         ppix = &m_bitmap;
 330         m_pixmap = NULL;
 331     }
 332
 333     *ppix = gdk_pixmap_new( wxGetRootWindow()->window, width, height, m_bpp );
 334
 335     return *ppix != NULL;
 336 }
 337
 338 wxBitmapRefData::~wxBitmapRefData()
 339 {
 340     if (m_pixmap)
 341         gdk_pixmap_unref( m_pixmap );
 342     if (m_bitmap)
 343         gdk_bitmap_unref( m_bitmap );
 344     delete m_mask;
 345 #if wxUSE_PALETTE
 346     delete m_palette;
 347 #endif // wxUSE_PALETTE
 348 }
 349
 350
 351 //-----------------------------------------------------------------------------
 352 // wxBitmap
 353 //-----------------------------------------------------------------------------
 354
 355 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 356
 357 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 358
 359 wxGDIRefData *wxBitmap::CreateGDIRefData() const
 360 {
 361     return new wxBitmapRefData;
 362 }
 363
 364 wxGDIRefData *wxBitmap::CloneGDIRefData(const wxGDIRefData *data) const
 365 {
 366     return new wxBitmapRefData(*static_cast<const wxBitmapRefData *>(data));
 367 }
 368
 369 bool wxBitmap::Create( int width, int height, int depth )
 370 {
 371     UnRef();
 372
 373     if ( width <= 0 || height <= 0 )
 374     {
 375         return false;
 376     }
 377
 378     m_refData = new wxBitmapRefData();
 379     return M_BMPDATA->Create(width, height, depth);
 380 }
 381
 382 wxBitmap::wxBitmap(const char* const* bits)
 383 {
 384     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 385
 386     GdkVisual *visual = wxTheApp->GetGdkVisual();
 387
 388     m_refData = new wxBitmapRefData();
 389
 390     GdkBitmap *mask = NULL;
 391
 392     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxGetRootWindow()->window, &mask, NULL, (gchar **) bits );
 393
 394     wxCHECK2_MSG(M_BMPDATA->m_pixmap, return, wxT("couldn't create pixmap"));
 395
 396     if (mask)
 397     {
 398         M_BMPDATA->m_mask = new wxMask();
 399         M_BMPDATA->m_mask->m_bitmap = mask;
 400     }
 401
 402     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 403
 404     M_BMPDATA->m_bpp = visual->depth;  // Can we get a different depth from create_from_xpm_d() ?
 405 }
 406
 407 wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
 408 {
 409     wxCHECK_MSG( IsOk(), wxNullBitmap, wxT("invalid bitmap") );
 410
 411     if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 412         return *this;
 413
 414     int width = wxMax(newx, 1);
 415     int height = wxMax(newy, 1);
 416     width = wxMin(width, clipwidth);
 417     height = wxMin(height, clipheight);
 418
 419     wxBitmap bmp;
 420
 421     GdkImage *img = NULL;
 422     if (GetPixmap())
 423         img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
 424     else if (GetBitmap())
 425         img = gdk_image_get( GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 426     else
 427         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 428
 429     wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
 430
 431     int bpp = -1;
 432
 433
 434     GdkGC *gc = NULL;
 435     GdkPixmap *dstpix = NULL;
 436     if (GetPixmap())
 437     {
 438         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 439         if (visual == NULL)
 440             visual = wxTheApp->GetGdkVisual();
 441
 442         bpp = visual->depth;
 443         bmp = wxBitmap(width,height,bpp);
 444         dstpix = bmp.GetPixmap();
 445         gc = gdk_gc_new( dstpix );
 446     }
 447
 448     char *dst = NULL;
 449     long dstbyteperline = 0;
 450
 451     if (GetBitmap())
 452     {
 453         bpp = 1;
 454         dstbyteperline = width/8*M_BMPDATA->m_bpp;
 455         if (width*M_BMPDATA->m_bpp % 8 != 0)
 456             dstbyteperline++;
 457         dst = (char*) malloc(dstbyteperline*height);
 458     }
 459
 460     // be careful to use the right scaling factor
 461     float scx = (float)M_BMPDATA->m_width/(float)newx;
 462     float scy = (float)M_BMPDATA->m_height/(float)newy;
 463     // prepare accel-tables
 464     int *tablex = (int *)calloc(width,sizeof(int));
 465     int *tabley = (int *)calloc(height,sizeof(int));
 466
 467     // accel table filled with clipped values
 468     for (int x = 0; x < width; x++)
 469         tablex[x] = (int) (scx * (x+clipx));
 470     for (int y = 0; y < height; y++)
 471         tabley[y] = (int) (scy * (y+clipy));
 472
 473     // Main rescaling routine starts here
 474     for (int h = 0; h < height; h++)
 475     {
 476         char outbyte = 0;
 477         int old_x = -1;
 478         guint32 old_pixval = 0;
 479
 480         for (int w = 0; w < width; w++)
 481         {
 482             guint32 pixval;
 483             int x = tablex[w];
 484             if (x == old_x)
 485                 pixval = old_pixval;
 486             else
 487             {
 488                 pixval = gdk_image_get_pixel( img, x, tabley[h] );
 489                 old_pixval = pixval;
 490                 old_x = x;
 491             }
 492
 493             if (bpp == 1)
 494             {
 495                 if (!pixval)
 496                 {
 497                     char bit=1;
 498                     char shift = bit << (w % 8);
 499                     outbyte |= shift;
 500                 }
 501
 502                 if ((w+1)%8==0)
 503                 {
 504                     dst[h*dstbyteperline+w/8] = outbyte;
 505                     outbyte = 0;
 506                 }
 507             }
 508             else
 509             {
 510                 GdkColor col;
 511                 col.pixel = pixval;
 512                 gdk_gc_set_foreground( gc, &col );
 513                 gdk_draw_point( dstpix, gc, w, h);
 514             }
 515         }
 516
 517         // do not forget the last byte
 518         if ((bpp == 1) && (width % 8 != 0))
 519             dst[h*dstbyteperline+width/8] = outbyte;
 520     }
 521
 522     gdk_image_destroy( img );
 523     if (gc) gdk_gc_unref( gc );
 524
 525     if (bpp == 1)
 526     {
 527         bmp = wxBitmap( (const char *)dst, width, height, 1 );
 528         free( dst );
 529     }
 530
 531     if (GetMask())
 532     {
 533         dstbyteperline = width/8;
 534         if (width % 8 != 0)
 535             dstbyteperline++;
 536         dst = (char*) malloc(dstbyteperline*height);
 537         img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 538
 539         for (int h = 0; h < height; h++)
 540         {
 541             char outbyte = 0;
 542             int old_x = -1;
 543             guint32 old_pixval = 0;
 544
 545             for (int w = 0; w < width; w++)
 546             {
 547                 guint32 pixval;
 548                 int x = tablex[w];
 549                 if (x == old_x)
 550                     pixval = old_pixval;
 551                 else
 552                 {
 553                     pixval = gdk_image_get_pixel( img, x, tabley[h] );
 554                     old_pixval = pixval;
 555                     old_x = x;
 556                 }
 557
 558                 if (pixval)
 559                 {
 560                     char bit=1;
 561                     char shift = bit << (w % 8);
 562                     outbyte |= shift;
 563                 }
 564
 565                 if ((w+1)%8 == 0)
 566                 {
 567                     dst[h*dstbyteperline+w/8] = outbyte;
 568                     outbyte = 0;
 569                 }
 570             }
 571
 572             // do not forget the last byte
 573             if (width % 8 != 0)
 574                 dst[h*dstbyteperline+width/8] = outbyte;
 575         }
 576         wxMask* mask = new wxMask;
 577         mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
 578         bmp.SetMask(mask);
 579
 580         free( dst );
 581         gdk_image_destroy( img );
 582     }
 583
 584     free( tablex );
 585     free( tabley );
 586
 587     return bmp;
 588 }
 589
 590 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 591 {
 592     UnRef();
 593
 594     wxCHECK_MSG( image.IsOk(), false, wxT("invalid image") );
 595     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 596
 597     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 598         return false;
 599
 600     m_refData = new wxBitmapRefData();
 601
 602     if (depth == 1)
 603     {
 604         return CreateFromImageAsBitmap(image);
 605     }
 606     else
 607     {
 608         return CreateFromImageAsPixmap(image);
 609     }
 610 }
 611
 612 // conversion to mono bitmap:
 613 bool wxBitmap::CreateFromImageAsBitmap(const wxImage& img)
 614 {
 615     // convert alpha channel to mask, if it is present:
 616     wxImage image(img);
 617     image.ConvertAlphaToMask();
 618
 619     int width = image.GetWidth();
 620     int height = image.GetHeight();
 621
 622     SetHeight( height );
 623     SetWidth( width );
 624
 625     SetBitmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 626
 627     SetDepth( 1 );
 628
 629     GdkVisual *visual = wxTheApp->GetGdkVisual();
 630
 631     // Create picture image
 632
 633     unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 634
 635     GdkImage *data_image =
 636         gdk_image_new_bitmap( visual, data_data, width, height );
 637
 638     // Create mask image
 639
 640     GdkImage *mask_image = NULL;
 641
 642     if (image.HasMask())
 643     {
 644         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 645
 646         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 647
 648         wxMask *mask = new wxMask();
 649         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 650
 651         SetMask( mask );
 652     }
 653
 654     int r_mask = image.GetMaskRed();
 655     int g_mask = image.GetMaskGreen();
 656     int b_mask = image.GetMaskBlue();
 657
 658     unsigned char* data = image.GetData();
 659
 660     int index = 0;
 661     for (int y = 0; y < height; y++)
 662     {
 663         for (int x = 0; x < width; x++)
 664         {
 665             int r = data[index];
 666             index++;
 667             int g = data[index];
 668             index++;
 669             int b = data[index];
 670             index++;
 671
 672             if (image.HasMask())
 673             {
 674                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 675                     gdk_image_put_pixel( mask_image, x, y, 1 );
 676                 else
 677                     gdk_image_put_pixel( mask_image, x, y, 0 );
 678             }
 679
 680             if ((r == 255) && (b == 255) && (g == 255))
 681                 gdk_image_put_pixel( data_image, x, y, 1 );
 682             else
 683                 gdk_image_put_pixel( data_image, x, y, 0 );
 684
 685         } // for
 686     }  // for
 687
 688     // Blit picture
 689
 690     GdkGC *data_gc = gdk_gc_new( GetBitmap() );
 691
 692     gdk_draw_image( GetBitmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 693
 694     gdk_image_destroy( data_image );
 695     gdk_gc_unref( data_gc );
 696
 697     // Blit mask
 698
 699     if (image.HasMask())
 700     {
 701         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 702
 703         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 704
 705         gdk_image_destroy( mask_image );
 706         gdk_gc_unref( mask_gc );
 707     }
 708
 709     return true;
 710 }
 711
 712 // conversion to colour bitmap:
 713 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& img)
 714 {
 715     // convert alpha channel to mask, if it is present:
 716     wxImage image(img);
 717     image.ConvertAlphaToMask();
 718
 719     int width = image.GetWidth();
 720     int height = image.GetHeight();
 721
 722     SetHeight( height );
 723     SetWidth( width );
 724
 725     SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 726
 727     GdkVisual *visual = wxTheApp->GetGdkVisual();
 728
 729     int bpp = visual->depth;
 730
 731     SetDepth( bpp );
 732
 733     if ((bpp == 16) && (visual->red_mask != 0xf800))
 734         bpp = 15;
 735     else if (bpp < 8)
 736         bpp = 8;
 737
 738     // We handle 8-bit bitmaps ourselves using the colour cube, 12-bit
 739     // visuals are not supported by GDK so we do these ourselves, too.
 740     // 15-bit and 16-bit should actually work and 24-bit certainly does.
 741 #ifdef __sgi
 742     if (!image.HasMask() && (bpp > 16))
 743 #else
 744     if (!image.HasMask() && (bpp > 12))
 745 #endif
 746     {
 747         static bool s_hasInitialized = false;
 748
 749         if (!s_hasInitialized)
 750         {
 751             gdk_rgb_init();
 752             s_hasInitialized = true;
 753         }
 754
 755         GdkGC *gc = gdk_gc_new( GetPixmap() );
 756
 757         gdk_draw_rgb_image( GetPixmap(),
 758                             gc,
 759                             0, 0,
 760                             width, height,
 761                             GDK_RGB_DITHER_NONE,
 762                             image.GetData(),
 763                             width*3 );
 764
 765         gdk_gc_unref( gc );
 766         return true;
 767     }
 768
 769     // Create picture image
 770
 771     GdkImage *data_image =
 772         gdk_image_new( GDK_IMAGE_FASTEST, visual, width, height );
 773
 774     // Create mask image
 775
 776     GdkImage *mask_image = NULL;
 777
 778     if (image.HasMask())
 779     {
 780         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 781
 782         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 783
 784         wxMask *mask = new wxMask();
 785         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 786
 787         SetMask( mask );
 788     }
 789
 790     // Render
 791
 792     enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
 793     byte_order b_o = RGB;
 794
 795     if (bpp > 8)
 796     {
 797         if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
 798         else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RBG;
 799         else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
 800         else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
 801         else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
 802         else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
 803     }
 804
 805     int r_mask = image.GetMaskRed();
 806     int g_mask = image.GetMaskGreen();
 807     int b_mask = image.GetMaskBlue();
 808
 809     unsigned char* data = image.GetData();
 810
 811     int index = 0;
 812     for (int y = 0; y < height; y++)
 813     {
 814         for (int x = 0; x < width; x++)
 815         {
 816             int r = data[index];
 817             index++;
 818             int g = data[index];
 819             index++;
 820             int b = data[index];
 821             index++;
 822
 823             if (image.HasMask())
 824             {
 825                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 826                     gdk_image_put_pixel( mask_image, x, y, 1 );
 827                 else
 828                     gdk_image_put_pixel( mask_image, x, y, 0 );
 829             }
 830
 831             switch (bpp)
 832             {
 833                 case 8:
 834                 {
 835                     int pixel = -1;
 836                     if (wxTheApp->m_colorCube)
 837                     {
 838                         pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
 839                     }
 840                     else
 841                     {
 842                         GdkColormap *cmap = gtk_widget_get_default_colormap();
 843                         GdkColor *colors = cmap->colors;
 844                         int max = 3 * (65536);
 845
 846                         for (int i = 0; i < cmap->size; i++)
 847                         {
 848                             int rdiff = (r << 8) - colors[i].red;
 849                             int gdiff = (g << 8) - colors[i].green;
 850                             int bdiff = (b << 8) - colors[i].blue;
 851                             int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 852                             if (sum < max) { pixel = i; max = sum; }
 853                         }
 854                     }
 855
 856                     gdk_image_put_pixel( data_image, x, y, pixel );
 857
 858                     break;
 859                 }
 860                 case 12:  // SGI only
 861                 {
 862                     guint32 pixel = 0;
 863                     switch (b_o)
 864                     {
 865                         case RGB: pixel = ((r & 0xf0) << 4) | (g & 0xf0) | ((b & 0xf0) >> 4); break;
 866                         case RBG: pixel = ((r & 0xf0) << 4) | (b & 0xf0) | ((g & 0xf0) >> 4); break;
 867                         case GRB: pixel = ((g & 0xf0) << 4) | (r & 0xf0) | ((b & 0xf0) >> 4); break;
 868                         case GBR: pixel = ((g & 0xf0) << 4) | (b & 0xf0) | ((r & 0xf0) >> 4); break;
 869                         case BRG: pixel = ((b & 0xf0) << 4) | (r & 0xf0) | ((g & 0xf0) >> 4); break;
 870                         case BGR: pixel = ((b & 0xf0) << 4) | (g & 0xf0) | ((r & 0xf0) >> 4); break;
 871                     }
 872                     gdk_image_put_pixel( data_image, x, y, pixel );
 873                     break;
 874                 }
 875                 case 15:
 876                 {
 877                     guint32 pixel = 0;
 878                     switch (b_o)
 879                     {
 880                         case RGB: pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 881                         case RBG: pixel = ((r & 0xf8) << 7) | ((b & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 882                         case GRB: pixel = ((g & 0xf8) << 7) | ((r & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 883                         case GBR: pixel = ((g & 0xf8) << 7) | ((b & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 884                         case BRG: pixel = ((b & 0xf8) << 7) | ((r & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 885                         case BGR: pixel = ((b & 0xf8) << 7) | ((g & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 886                     }
 887                     gdk_image_put_pixel( data_image, x, y, pixel );
 888                     break;
 889                 }
 890                 case 16:
 891                 {
 892                     // I actually don't know if for 16-bit displays, it is alway the green
 893                     // component or the second component which has 6 bits.
 894                     guint32 pixel = 0;
 895                     switch (b_o)
 896                     {
 897                         case RGB: pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 898                         case RBG: pixel = ((r & 0xf8) << 8) | ((b & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 899                         case GRB: pixel = ((g & 0xf8) << 8) | ((r & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 900                         case GBR: pixel = ((g & 0xf8) << 8) | ((b & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 901                         case BRG: pixel = ((b & 0xf8) << 8) | ((r & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 902                         case BGR: pixel = ((b & 0xf8) << 8) | ((g & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 903                     }
 904                     gdk_image_put_pixel( data_image, x, y, pixel );
 905                     break;
 906                 }
 907                 case 32:
 908                 case 24:
 909                 {
 910                     guint32 pixel = 0;
 911                     switch (b_o)
 912                     {
 913                         case RGB: pixel = (r << 16) | (g << 8) | b; break;
 914                         case RBG: pixel = (r << 16) | (b << 8) | g; break;
 915                         case BRG: pixel = (b << 16) | (r << 8) | g; break;
 916                         case BGR: pixel = (b << 16) | (g << 8) | r; break;
 917                         case GRB: pixel = (g << 16) | (r << 8) | b; break;
 918                         case GBR: pixel = (g << 16) | (b << 8) | r; break;
 919                     }
 920                     gdk_image_put_pixel( data_image, x, y, pixel );
 921                     break;
 922                 }
 923                 default: break;
 924             }
 925         } // for
 926     }  // for
 927
 928     // Blit picture
 929
 930     GdkGC *data_gc = gdk_gc_new( GetPixmap() );
 931
 932     gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 933
 934     gdk_image_destroy( data_image );
 935     gdk_gc_unref( data_gc );
 936
 937     // Blit mask
 938
 939     if (image.HasMask())
 940     {
 941         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 942
 943         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 944
 945         gdk_image_destroy( mask_image );
 946         gdk_gc_unref( mask_gc );
 947     }
 948
 949     return true;
 950 }
 951
 952 wxImage wxBitmap::ConvertToImage() const
 953 {
 954     wxImage image;
 955
 956     wxCHECK_MSG( IsOk(), wxNullImage, wxT("invalid bitmap") );
 957
 958     image.Create(GetWidth(), GetHeight());
 959     unsigned char *data = image.GetData();
 960
 961     if (!data)
 962     {
 963         wxFAIL_MSG( wxT("couldn't create image") );
 964         return wxNullImage;
 965     }
 966
 967     // the colour used as transparent one in wxImage and the one it is
 968     // replaced with when it really occurs in the bitmap
 969     static const int MASK_RED = 1;
 970     static const int MASK_GREEN = 2;
 971     static const int MASK_BLUE = 3;
 972     static const int MASK_BLUE_REPLACEMENT = 2;
 973
 974     GdkImage *gdk_image = NULL;
 975
 976     if (HasPixmap())
 977     {
 978         gdk_image = gdk_image_get( GetPixmap(),
 979                                     0, 0,
 980                                     GetWidth(), GetHeight() );
 981     }
 982     else if (GetBitmap())
 983     {
 984         gdk_image = gdk_image_get( GetBitmap(),
 985                                     0, 0,
 986                                     GetWidth(), GetHeight() );
 987     }
 988     else
 989     {
 990         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 991     }
 992
 993     wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
 994
 995     GdkImage *gdk_image_mask = NULL;
 996     if (GetMask())
 997     {
 998         gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
 999                                         0, 0,
1000                                         GetWidth(), GetHeight() );
1001
1002         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1003     }
1004
1005     int bpp = -1;
1006     int red_shift_right = 0;
1007     int green_shift_right = 0;
1008     int blue_shift_right = 0;
1009     int red_shift_left = 0;
1010     int green_shift_left = 0;
1011     int blue_shift_left = 0;
1012     bool use_shift = false;
1013
1014     if (GetPixmap())
1015     {
1016         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
1017         if (visual == NULL)
1018             visual = wxTheApp->GetGdkVisual();
1019
1020         bpp = visual->depth;
1021         if (bpp == 16)
1022             bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
1023         red_shift_right = visual->red_shift;
1024         red_shift_left = 8-visual->red_prec;
1025         green_shift_right = visual->green_shift;
1026         green_shift_left = 8-visual->green_prec;
1027         blue_shift_right = visual->blue_shift;
1028         blue_shift_left = 8-visual->blue_prec;
1029
1030         use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
1031     }
1032     if (GetBitmap())
1033     {
1034         bpp = 1;
1035     }
1036
1037
1038     GdkColormap *cmap = gtk_widget_get_default_colormap();
1039
1040     long pos = 0;
1041     for (int j = 0; j < GetHeight(); j++)
1042     {
1043         for (int i = 0; i < GetWidth(); i++)
1044         {
1045             wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
1046             if (bpp == 1)
1047             {
1048                 if (pixel == 0)
1049                 {
1050                     data[pos]   = 0;
1051                     data[pos+1] = 0;
1052                     data[pos+2] = 0;
1053                 }
1054                 else
1055                 {
1056                     data[pos]   = 255;
1057                     data[pos+1] = 255;
1058                     data[pos+2] = 255;
1059                 }
1060             }
1061             else if (use_shift)
1062             {
1063                 data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
1064                 data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
1065                 data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
1066             }
1067             else if (cmap->colors)
1068             {
1069                 data[pos] =   cmap->colors[pixel].red   >> 8;
1070                 data[pos+1] = cmap->colors[pixel].green >> 8;
1071                 data[pos+2] = cmap->colors[pixel].blue  >> 8;
1072             }
1073             else
1074             {
1075                 wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
1076             }
1077
1078             if (gdk_image_mask)
1079             {
1080                 int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
1081                 if (mask_pixel == 0)
1082                 {
1083                     data[pos] = MASK_RED;
1084                     data[pos+1] = MASK_GREEN;
1085                     data[pos+2] = MASK_BLUE;
1086                 }
1087                 else if ( data[pos] == MASK_RED &&
1088                             data[pos+1] == MASK_GREEN &&
1089                                 data[pos+2] == MASK_BLUE )
1090                 {
1091                     data[pos+2] = MASK_BLUE_REPLACEMENT;
1092                 }
1093             }
1094
1095             pos += 3;
1096         }
1097     }
1098
1099     gdk_image_destroy( gdk_image );
1100     if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
1101
1102     return image;
1103 }
1104
1105 wxBitmap::wxBitmap( const wxString &filename, wxBitmapType type )
1106 {
1107     LoadFile( filename, type );
1108 }
1109
1110 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
1111 {
1112     if ( width > 0 && height > 0 )
1113     {
1114         m_refData = new wxBitmapRefData();
1115
1116         M_BMPDATA->m_mask = NULL;
1117         M_BMPDATA->m_bitmap = gdk_bitmap_create_from_data
1118                               (
1119                                 wxGetRootWindow()->window,
1120                                 (gchar *) bits,
1121                                 width,
1122                                 height
1123                               );
1124         M_BMPDATA->m_width = width;
1125         M_BMPDATA->m_height = height;
1126         M_BMPDATA->m_bpp = 1;
1127
1128         wxASSERT_MSG( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
1129     }
1130 }
1131
1132 wxBitmap::~wxBitmap()
1133 {
1134 }
1135
1136 int wxBitmap::GetHeight() const
1137 {
1138     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
1139
1140     return M_BMPDATA->m_height;
1141 }
1142
1143 int wxBitmap::GetWidth() const
1144 {
1145     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
1146
1147     return M_BMPDATA->m_width;
1148 }
1149
1150 int wxBitmap::GetDepth() const
1151 {
1152     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
1153
1154     return M_BMPDATA->m_bpp;
1155 }
1156
1157 wxMask *wxBitmap::GetMask() const
1158 {
1159     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
1160
1161     return M_BMPDATA->m_mask;
1162 }
1163
1164 void wxBitmap::SetMask( wxMask *mask )
1165 {
1166     wxCHECK_RET( IsOk(), wxT("invalid bitmap") );
1167
1168     AllocExclusive();
1169     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
1170
1171     M_BMPDATA->m_mask = mask;
1172 }
1173
1174 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
1175 {
1176     *this = icon;
1177     return true;
1178 }
1179
1180 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1181 {
1182     wxCHECK_MSG( IsOk() &&
1183                  (rect.x >= 0) && (rect.y >= 0) &&
1184                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
1185                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1186
1187     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
1188     wxASSERT_MSG( ret.IsOk(), wxT("GetSubBitmap error") );
1189
1190     if (ret.GetPixmap())
1191     {
1192         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1193         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1194         gdk_gc_destroy( gc );
1195     }
1196     else
1197     {
1198         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
1199         GdkColor col;
1200         col.pixel = 0xFFFFFF;
1201         gdk_gc_set_foreground( gc, &col );
1202         col.pixel = 0;
1203         gdk_gc_set_background( gc, &col );
1204         gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1205         gdk_gc_destroy( gc );
1206     }
1207
1208     if (GetMask())
1209     {
1210         wxMask *mask = new wxMask;
1211         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
1212
1213         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
1214         GdkColor col;
1215         col.pixel = 0xFFFFFF;
1216         gdk_gc_set_foreground( gc, &col );
1217         col.pixel = 0;
1218         gdk_gc_set_background( gc, &col );
1219         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height );
1220         gdk_gc_destroy( gc );
1221
1222         ret.SetMask( mask );
1223     }
1224
1225     return ret;
1226 }
1227
1228 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
1229 {
1230     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
1231
1232     // Try to save the bitmap via wxImage handlers:
1233     {
1234         wxImage image = ConvertToImage();
1235         if (image.IsOk()) return image.SaveFile( name, type );
1236     }
1237
1238     return false;
1239 }
1240
1241 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
1242 {
1243     UnRef();
1244
1245     if (!wxFileExists(name))
1246         return false;
1247
1248     GdkVisual *visual = wxTheApp->GetGdkVisual();
1249
1250     if (type == wxBITMAP_TYPE_XPM)
1251     {
1252         m_refData = new wxBitmapRefData();
1253
1254         GdkBitmap *mask = NULL;
1255
1256         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
1257                               (
1258                                 wxGetRootWindow()->window,
1259                                 &mask,
1260                                 NULL,
1261                                 name.fn_str()
1262                               );
1263
1264         if (mask)
1265         {
1266            M_BMPDATA->m_mask = new wxMask();
1267            M_BMPDATA->m_mask->m_bitmap = mask;
1268         }
1269
1270         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
1271
1272         M_BMPDATA->m_bpp = visual->depth;
1273     }
1274     else // try if wxImage can load it
1275     {
1276         wxImage image;
1277         if ( !image.LoadFile( name, type ) || !image.IsOk() )
1278             return false;
1279
1280         *this = wxBitmap(image);
1281     }
1282
1283     return true;
1284 }
1285
1286 #if wxUSE_PALETTE
1287 wxPalette *wxBitmap::GetPalette() const
1288 {
1289     if (!IsOk())
1290         return NULL;
1291
1292     return M_BMPDATA->m_palette;
1293 }
1294
1295 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
1296 {
1297     // TODO
1298 }
1299 #endif // wxUSE_PALETTE
1300
1301 void wxBitmap::SetHeight( int height )
1302 {
1303     AllocExclusive();
1304     M_BMPDATA->m_height = height;
1305 }
1306
1307 void wxBitmap::SetWidth( int width )
1308 {
1309     AllocExclusive();
1310     M_BMPDATA->m_width = width;
1311 }
1312
1313 void wxBitmap::SetDepth( int depth )
1314 {
1315     AllocExclusive();
1316     M_BMPDATA->m_bpp = depth;
1317 }
1318
1319 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1320 {
1321     if (!m_refData)
1322         m_refData = new wxBitmapRefData();
1323
1324     M_BMPDATA->m_pixmap = pixmap;
1325 }
1326
1327 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
1328 {
1329     if (!m_refData)
1330         m_refData = new wxBitmapRefData();
1331
1332     M_BMPDATA->m_bitmap = bitmap;
1333 }
1334
1335 GdkPixmap *wxBitmap::GetPixmap() const
1336 {
1337     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
1338
1339     return M_BMPDATA->m_pixmap;
1340 }
1341
1342 bool wxBitmap::HasPixmap() const
1343 {
1344     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
1345
1346     return M_BMPDATA->m_pixmap != NULL;
1347 }
1348
1349 GdkBitmap *wxBitmap::GetBitmap() const
1350 {
1351     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
1352
1353     return M_BMPDATA->m_bitmap;
1354 }
1355
1356 void *wxBitmap::GetRawData(wxPixelDataBase& WXUNUSED(data), int WXUNUSED(bpp))
1357 {
1358     return NULL;
1359 }
1360
1361 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
1362 {
1363 }
1364
1365 bool wxBitmap::HasAlpha() const
1366 {
1367     return false;
1368 }
1369
1370 /* static */ void wxBitmap::InitStandardHandlers()
1371 {
1372     // TODO: Insert handler based on GdkPixbufs handler later
1373 }