src/gtk1/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/bitmap.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/bitmap.h"
  14
  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 // WX_PRECOMP
  23
  24 #include "wx/filefn.h"
  25
  26 #include <gdk/gdk.h>
  27 #include <gtk/gtk.h>
  28 #include <gdk/gdkx.h>
  29
  30 #include <gdk/gdkrgb.h>
  31
  32 extern
  33 void gdk_wx_draw_bitmap (GdkDrawable  *drawable,
  34                          GdkGC        *gc,
  35                          GdkDrawable  *src,
  36                          gint          xsrc,
  37                          gint          ysrc,
  38                          gint          xdest,
  39                          gint          ydest,
  40                          gint          width,
  41                          gint          height);
  42
  43 //-----------------------------------------------------------------------------
  44 // data
  45 //-----------------------------------------------------------------------------
  46
  47 extern GtkWidget *wxGetRootWindow();
  48
  49 //-----------------------------------------------------------------------------
  50 // wxMask
  51 //-----------------------------------------------------------------------------
  52
  53 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  54
  55 wxMask::wxMask()
  56 {
  57     m_bitmap = NULL;
  58 }
  59
  60 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  61 {
  62     m_bitmap = NULL;
  63     Create( bitmap, colour );
  64 }
  65
  66 #if wxUSE_PALETTE
  67 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  68 {
  69     m_bitmap = NULL;
  70     Create( bitmap, paletteIndex );
  71 }
  72 #endif // wxUSE_PALETTE
  73
  74 wxMask::wxMask( const wxBitmap& bitmap )
  75 {
  76     m_bitmap = NULL;
  77     Create( bitmap );
  78 }
  79
  80 wxMask::~wxMask()
  81 {
  82     if (m_bitmap)
  83         gdk_bitmap_unref( m_bitmap );
  84 }
  85
  86 bool wxMask::Create( const wxBitmap& bitmap,
  87                      const wxColour& colour )
  88 {
  89     if (m_bitmap)
  90     {
  91         gdk_bitmap_unref( m_bitmap );
  92         m_bitmap = NULL;
  93     }
  94
  95     wxImage image = bitmap.ConvertToImage();
  96     if (!image.Ok()) return false;
  97
  98     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, image.GetWidth(), image.GetHeight(), 1 );
  99     GdkGC *gc = gdk_gc_new( m_bitmap );
 100
 101     GdkColor color;
 102     color.red = 65000;
 103     color.green = 65000;
 104     color.blue = 65000;
 105     color.pixel = 1;
 106     gdk_gc_set_foreground( gc, &color );
 107     gdk_gc_set_fill( gc, GDK_SOLID );
 108     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
 109
 110     unsigned char *data = image.GetData();
 111     int index = 0;
 112
 113     unsigned char red = colour.Red();
 114     unsigned char green = colour.Green();
 115     unsigned char blue = colour.Blue();
 116
 117     GdkVisual *visual = wxTheApp->GetGdkVisual();
 118
 119     int bpp = visual->depth;
 120     if ((bpp == 16) && (visual->red_mask != 0xf800))
 121         bpp = 15;
 122     if (bpp == 15)
 123     {
 124         red = red & 0xf8;
 125         green = green & 0xf8;
 126         blue = blue & 0xf8;
 127     }
 128     else if (bpp == 16)
 129     {
 130         red = red & 0xf8;
 131         green = green & 0xfc;
 132         blue = blue & 0xf8;
 133     }
 134     else if (bpp == 12)
 135     {
 136         red = red & 0xf0;
 137         green = green & 0xf0;
 138         blue = blue & 0xf0;
 139     }
 140
 141     color.red = 0;
 142     color.green = 0;
 143     color.blue = 0;
 144     color.pixel = 0;
 145     gdk_gc_set_foreground( gc, &color );
 146
 147     for (int j = 0; j < image.GetHeight(); j++)
 148     {
 149         int start_x = -1;
 150         int i;
 151         for (i = 0; i < image.GetWidth(); i++)
 152         {
 153             if ((data[index] == red) &&
 154                 (data[index+1] == green) &&
 155                 (data[index+2] == blue))
 156             {
 157                 if (start_x == -1)
 158                 start_x = i;
 159             }
 160             else
 161             {
 162                 if (start_x != -1)
 163                 {
 164                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 165                     start_x = -1;
 166                 }
 167             }
 168             index += 3;
 169         }
 170         if (start_x != -1)
 171             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 172     }
 173
 174     gdk_gc_unref( gc );
 175
 176     return true;
 177 }
 178
 179 #if wxUSE_PALETTE
 180 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 181 {
 182     unsigned char r,g,b;
 183     wxPalette *pal = bitmap.GetPalette();
 184
 185     wxCHECK_MSG( pal, false, wxT("Cannot create mask from bitmap without palette") );
 186
 187     pal->GetRGB(paletteIndex, &r, &g, &b);
 188
 189     return Create(bitmap, wxColour(r, g, b));
 190 }
 191 #endif // wxUSE_PALETTE
 192
 193 bool wxMask::Create( const wxBitmap& bitmap )
 194 {
 195     if (m_bitmap)
 196     {
 197         gdk_bitmap_unref( m_bitmap );
 198         m_bitmap = NULL;
 199     }
 200
 201     if (!bitmap.Ok()) return false;
 202
 203     wxCHECK_MSG( bitmap.GetBitmap(), false, wxT("Cannot create mask from colour bitmap") );
 204
 205     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 206
 207     if (!m_bitmap) return false;
 208
 209     GdkGC *gc = gdk_gc_new( m_bitmap );
 210
 211     gdk_wx_draw_bitmap( m_bitmap, gc, bitmap.GetBitmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
 212
 213     gdk_gc_unref( gc );
 214
 215     return true;
 216 }
 217
 218 GdkBitmap *wxMask::GetBitmap() const
 219 {
 220     return m_bitmap;
 221 }
 222
 223 //-----------------------------------------------------------------------------
 224 // wxBitmap
 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                   _T("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 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 353
 354 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 355
 356 wxBitmap::wxBitmap()
 357 {
 358 }
 359
 360 wxBitmap::wxBitmap( int width, int height, int depth )
 361 {
 362     Create( width, height, depth );
 363 }
 364
 365 wxGDIRefData *wxBitmap::CreateGDIRefData() const
 366 {
 367     return new wxBitmapRefData;
 368 }
 369
 370 wxGDIRefData *wxBitmap::CloneGDIRefData(const wxGDIRefData *data) const
 371 {
 372     return new wxBitmapRefData(*static_cast<const wxBitmapRefData *>(data));
 373 }
 374
 375 bool wxBitmap::Create( int width, int height, int depth )
 376 {
 377     UnRef();
 378
 379     if ( width <= 0 || height <= 0 )
 380     {
 381         return false;
 382     }
 383
 384     m_refData = new wxBitmapRefData();
 385     return M_BMPDATA->Create(width, height, depth);
 386 }
 387
 388 wxBitmap::wxBitmap(const char* const* bits)
 389 {
 390     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 391
 392     GdkVisual *visual = wxTheApp->GetGdkVisual();
 393
 394     m_refData = new wxBitmapRefData();
 395
 396     GdkBitmap *mask = NULL;
 397
 398     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxGetRootWindow()->window, &mask, NULL, (gchar **) bits );
 399
 400     wxCHECK2_MSG(M_BMPDATA->m_pixmap, return, wxT("couldn't create pixmap"));
 401
 402     if (mask)
 403     {
 404         M_BMPDATA->m_mask = new wxMask();
 405         M_BMPDATA->m_mask->m_bitmap = mask;
 406     }
 407
 408     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 409
 410     M_BMPDATA->m_bpp = visual->depth;  // Can we get a different depth from create_from_xpm_d() ?
 411 }
 412
 413 wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
 414 {
 415     wxCHECK_MSG( Ok(), wxNullBitmap, wxT("invalid bitmap") );
 416
 417     if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 418         return *this;
 419
 420     int width = wxMax(newx, 1);
 421     int height = wxMax(newy, 1);
 422     width = wxMin(width, clipwidth);
 423     height = wxMin(height, clipheight);
 424
 425     wxBitmap bmp;
 426
 427     GdkImage *img = NULL;
 428     if (GetPixmap())
 429         img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
 430     else if (GetBitmap())
 431         img = gdk_image_get( GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 432     else
 433         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 434
 435     wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
 436
 437     int bpp = -1;
 438
 439
 440     GdkGC *gc = NULL;
 441     GdkPixmap *dstpix = NULL;
 442     if (GetPixmap())
 443     {
 444         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 445         if (visual == NULL)
 446             visual = wxTheApp->GetGdkVisual();
 447
 448         bpp = visual->depth;
 449         bmp = wxBitmap(width,height,bpp);
 450         dstpix = bmp.GetPixmap();
 451         gc = gdk_gc_new( dstpix );
 452     }
 453
 454     char *dst = NULL;
 455     long dstbyteperline = 0;
 456
 457     if (GetBitmap())
 458     {
 459         bpp = 1;
 460         dstbyteperline = width/8*M_BMPDATA->m_bpp;
 461         if (width*M_BMPDATA->m_bpp % 8 != 0)
 462             dstbyteperline++;
 463         dst = (char*) malloc(dstbyteperline*height);
 464     }
 465
 466     // be careful to use the right scaling factor
 467     float scx = (float)M_BMPDATA->m_width/(float)newx;
 468     float scy = (float)M_BMPDATA->m_height/(float)newy;
 469     // prepare accel-tables
 470     int *tablex = (int *)calloc(width,sizeof(int));
 471     int *tabley = (int *)calloc(height,sizeof(int));
 472
 473     // accel table filled with clipped values
 474     for (int x = 0; x < width; x++)
 475         tablex[x] = (int) (scx * (x+clipx));
 476     for (int y = 0; y < height; y++)
 477         tabley[y] = (int) (scy * (y+clipy));
 478
 479     // Main rescaling routine starts here
 480     for (int h = 0; h < height; h++)
 481     {
 482         char outbyte = 0;
 483         int old_x = -1;
 484         guint32 old_pixval = 0;
 485
 486         for (int w = 0; w < width; w++)
 487         {
 488             guint32 pixval;
 489             int x = tablex[w];
 490             if (x == old_x)
 491                 pixval = old_pixval;
 492             else
 493             {
 494                 pixval = gdk_image_get_pixel( img, x, tabley[h] );
 495                 old_pixval = pixval;
 496                 old_x = x;
 497             }
 498
 499             if (bpp == 1)
 500             {
 501                 if (!pixval)
 502                 {
 503                     char bit=1;
 504                     char shift = bit << (w % 8);
 505                     outbyte |= shift;
 506                 }
 507
 508                 if ((w+1)%8==0)
 509                 {
 510                     dst[h*dstbyteperline+w/8] = outbyte;
 511                     outbyte = 0;
 512                 }
 513             }
 514             else
 515             {
 516                 GdkColor col;
 517                 col.pixel = pixval;
 518                 gdk_gc_set_foreground( gc, &col );
 519                 gdk_draw_point( dstpix, gc, w, h);
 520             }
 521         }
 522
 523         // do not forget the last byte
 524         if ((bpp == 1) && (width % 8 != 0))
 525             dst[h*dstbyteperline+width/8] = outbyte;
 526     }
 527
 528     gdk_image_destroy( img );
 529     if (gc) gdk_gc_unref( gc );
 530
 531     if (bpp == 1)
 532     {
 533         bmp = wxBitmap( (const char *)dst, width, height, 1 );
 534         free( dst );
 535     }
 536
 537     if (GetMask())
 538     {
 539         dstbyteperline = width/8;
 540         if (width % 8 != 0)
 541             dstbyteperline++;
 542         dst = (char*) malloc(dstbyteperline*height);
 543         img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 544
 545         for (int h = 0; h < height; h++)
 546         {
 547             char outbyte = 0;
 548             int old_x = -1;
 549             guint32 old_pixval = 0;
 550
 551             for (int w = 0; w < width; w++)
 552             {
 553                 guint32 pixval;
 554                 int x = tablex[w];
 555                 if (x == old_x)
 556                     pixval = old_pixval;
 557                 else
 558                 {
 559                     pixval = gdk_image_get_pixel( img, x, tabley[h] );
 560                     old_pixval = pixval;
 561                     old_x = x;
 562                 }
 563
 564                 if (pixval)
 565                 {
 566                     char bit=1;
 567                     char shift = bit << (w % 8);
 568                     outbyte |= shift;
 569                 }
 570
 571                 if ((w+1)%8 == 0)
 572                 {
 573                     dst[h*dstbyteperline+w/8] = outbyte;
 574                     outbyte = 0;
 575                 }
 576             }
 577
 578             // do not forget the last byte
 579             if (width % 8 != 0)
 580                 dst[h*dstbyteperline+width/8] = outbyte;
 581         }
 582         wxMask* mask = new wxMask;
 583         mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
 584         bmp.SetMask(mask);
 585
 586         free( dst );
 587         gdk_image_destroy( img );
 588     }
 589
 590     free( tablex );
 591     free( tabley );
 592
 593     return bmp;
 594 }
 595
 596 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 597 {
 598     UnRef();
 599
 600     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 601     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 602
 603     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 604         return false;
 605
 606     m_refData = new wxBitmapRefData();
 607
 608     if (depth == 1)
 609     {
 610         return CreateFromImageAsBitmap(image);
 611     }
 612     else
 613     {
 614         return CreateFromImageAsPixmap(image);
 615     }
 616 }
 617
 618 // conversion to mono bitmap:
 619 bool wxBitmap::CreateFromImageAsBitmap(const wxImage& img)
 620 {
 621     // convert alpha channel to mask, if it is present:
 622     wxImage image(img);
 623     image.ConvertAlphaToMask();
 624
 625     int width = image.GetWidth();
 626     int height = image.GetHeight();
 627
 628     SetHeight( height );
 629     SetWidth( width );
 630
 631     SetBitmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 632
 633     SetDepth( 1 );
 634
 635     GdkVisual *visual = wxTheApp->GetGdkVisual();
 636
 637     // Create picture image
 638
 639     unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 640
 641     GdkImage *data_image =
 642         gdk_image_new_bitmap( visual, data_data, width, height );
 643
 644     // Create mask image
 645
 646     GdkImage *mask_image = NULL;
 647
 648     if (image.HasMask())
 649     {
 650         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 651
 652         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 653
 654         wxMask *mask = new wxMask();
 655         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 656
 657         SetMask( mask );
 658     }
 659
 660     int r_mask = image.GetMaskRed();
 661     int g_mask = image.GetMaskGreen();
 662     int b_mask = image.GetMaskBlue();
 663
 664     unsigned char* data = image.GetData();
 665
 666     int index = 0;
 667     for (int y = 0; y < height; y++)
 668     {
 669         for (int x = 0; x < width; x++)
 670         {
 671             int r = data[index];
 672             index++;
 673             int g = data[index];
 674             index++;
 675             int b = data[index];
 676             index++;
 677
 678             if (image.HasMask())
 679             {
 680                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 681                     gdk_image_put_pixel( mask_image, x, y, 1 );
 682                 else
 683                     gdk_image_put_pixel( mask_image, x, y, 0 );
 684             }
 685
 686             if ((r == 255) && (b == 255) && (g == 255))
 687                 gdk_image_put_pixel( data_image, x, y, 1 );
 688             else
 689                 gdk_image_put_pixel( data_image, x, y, 0 );
 690
 691         } // for
 692     }  // for
 693
 694     // Blit picture
 695
 696     GdkGC *data_gc = gdk_gc_new( GetBitmap() );
 697
 698     gdk_draw_image( GetBitmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 699
 700     gdk_image_destroy( data_image );
 701     gdk_gc_unref( data_gc );
 702
 703     // Blit mask
 704
 705     if (image.HasMask())
 706     {
 707         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 708
 709         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 710
 711         gdk_image_destroy( mask_image );
 712         gdk_gc_unref( mask_gc );
 713     }
 714
 715     return true;
 716 }
 717
 718 // conversion to colour bitmap:
 719 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& img)
 720 {
 721     // convert alpha channel to mask, if it is present:
 722     wxImage image(img);
 723     image.ConvertAlphaToMask();
 724
 725     int width = image.GetWidth();
 726     int height = image.GetHeight();
 727
 728     SetHeight( height );
 729     SetWidth( width );
 730
 731     SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 732
 733     GdkVisual *visual = wxTheApp->GetGdkVisual();
 734
 735     int bpp = visual->depth;
 736
 737     SetDepth( bpp );
 738
 739     if ((bpp == 16) && (visual->red_mask != 0xf800))
 740         bpp = 15;
 741     else if (bpp < 8)
 742         bpp = 8;
 743
 744     // We handle 8-bit bitmaps ourselves using the colour cube, 12-bit
 745     // visuals are not supported by GDK so we do these ourselves, too.
 746     // 15-bit and 16-bit should actually work and 24-bit certainly does.
 747 #ifdef __sgi
 748     if (!image.HasMask() && (bpp > 16))
 749 #else
 750     if (!image.HasMask() && (bpp > 12))
 751 #endif
 752     {
 753         static bool s_hasInitialized = false;
 754
 755         if (!s_hasInitialized)
 756         {
 757             gdk_rgb_init();
 758             s_hasInitialized = true;
 759         }
 760
 761         GdkGC *gc = gdk_gc_new( GetPixmap() );
 762
 763         gdk_draw_rgb_image( GetPixmap(),
 764                             gc,
 765                             0, 0,
 766                             width, height,
 767                             GDK_RGB_DITHER_NONE,
 768                             image.GetData(),
 769                             width*3 );
 770
 771         gdk_gc_unref( gc );
 772         return true;
 773     }
 774
 775     // Create picture image
 776
 777     GdkImage *data_image =
 778         gdk_image_new( GDK_IMAGE_FASTEST, visual, width, height );
 779
 780     // Create mask image
 781
 782     GdkImage *mask_image = NULL;
 783
 784     if (image.HasMask())
 785     {
 786         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 787
 788         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 789
 790         wxMask *mask = new wxMask();
 791         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 792
 793         SetMask( mask );
 794     }
 795
 796     // Render
 797
 798     enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
 799     byte_order b_o = RGB;
 800
 801     if (bpp > 8)
 802     {
 803         if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
 804         else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RBG;
 805         else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
 806         else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
 807         else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
 808         else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
 809     }
 810
 811     int r_mask = image.GetMaskRed();
 812     int g_mask = image.GetMaskGreen();
 813     int b_mask = image.GetMaskBlue();
 814
 815     unsigned char* data = image.GetData();
 816
 817     int index = 0;
 818     for (int y = 0; y < height; y++)
 819     {
 820         for (int x = 0; x < width; x++)
 821         {
 822             int r = data[index];
 823             index++;
 824             int g = data[index];
 825             index++;
 826             int b = data[index];
 827             index++;
 828
 829             if (image.HasMask())
 830             {
 831                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 832                     gdk_image_put_pixel( mask_image, x, y, 1 );
 833                 else
 834                     gdk_image_put_pixel( mask_image, x, y, 0 );
 835             }
 836
 837             switch (bpp)
 838             {
 839                 case 8:
 840                 {
 841                     int pixel = -1;
 842                     if (wxTheApp->m_colorCube)
 843                     {
 844                         pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
 845                     }
 846                     else
 847                     {
 848                         GdkColormap *cmap = gtk_widget_get_default_colormap();
 849                         GdkColor *colors = cmap->colors;
 850                         int max = 3 * (65536);
 851
 852                         for (int i = 0; i < cmap->size; i++)
 853                         {
 854                             int rdiff = (r << 8) - colors[i].red;
 855                             int gdiff = (g << 8) - colors[i].green;
 856                             int bdiff = (b << 8) - colors[i].blue;
 857                             int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 858                             if (sum < max) { pixel = i; max = sum; }
 859                         }
 860                     }
 861
 862                     gdk_image_put_pixel( data_image, x, y, pixel );
 863
 864                     break;
 865                 }
 866                 case 12:  // SGI only
 867                 {
 868                     guint32 pixel = 0;
 869                     switch (b_o)
 870                     {
 871                         case RGB: pixel = ((r & 0xf0) << 4) | (g & 0xf0) | ((b & 0xf0) >> 4); break;
 872                         case RBG: pixel = ((r & 0xf0) << 4) | (b & 0xf0) | ((g & 0xf0) >> 4); break;
 873                         case GRB: pixel = ((g & 0xf0) << 4) | (r & 0xf0) | ((b & 0xf0) >> 4); break;
 874                         case GBR: pixel = ((g & 0xf0) << 4) | (b & 0xf0) | ((r & 0xf0) >> 4); break;
 875                         case BRG: pixel = ((b & 0xf0) << 4) | (r & 0xf0) | ((g & 0xf0) >> 4); break;
 876                         case BGR: pixel = ((b & 0xf0) << 4) | (g & 0xf0) | ((r & 0xf0) >> 4); break;
 877                     }
 878                     gdk_image_put_pixel( data_image, x, y, pixel );
 879                     break;
 880                 }
 881                 case 15:
 882                 {
 883                     guint32 pixel = 0;
 884                     switch (b_o)
 885                     {
 886                         case RGB: pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 887                         case RBG: pixel = ((r & 0xf8) << 7) | ((b & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 888                         case GRB: pixel = ((g & 0xf8) << 7) | ((r & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 889                         case GBR: pixel = ((g & 0xf8) << 7) | ((b & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 890                         case BRG: pixel = ((b & 0xf8) << 7) | ((r & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 891                         case BGR: pixel = ((b & 0xf8) << 7) | ((g & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 892                     }
 893                     gdk_image_put_pixel( data_image, x, y, pixel );
 894                     break;
 895                 }
 896                 case 16:
 897                 {
 898                     // I actually don't know if for 16-bit displays, it is alway the green
 899                     // component or the second component which has 6 bits.
 900                     guint32 pixel = 0;
 901                     switch (b_o)
 902                     {
 903                         case RGB: pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 904                         case RBG: pixel = ((r & 0xf8) << 8) | ((b & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 905                         case GRB: pixel = ((g & 0xf8) << 8) | ((r & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 906                         case GBR: pixel = ((g & 0xf8) << 8) | ((b & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 907                         case BRG: pixel = ((b & 0xf8) << 8) | ((r & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 908                         case BGR: pixel = ((b & 0xf8) << 8) | ((g & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 909                     }
 910                     gdk_image_put_pixel( data_image, x, y, pixel );
 911                     break;
 912                 }
 913                 case 32:
 914                 case 24:
 915                 {
 916                     guint32 pixel = 0;
 917                     switch (b_o)
 918                     {
 919                         case RGB: pixel = (r << 16) | (g << 8) | b; break;
 920                         case RBG: pixel = (r << 16) | (b << 8) | g; break;
 921                         case BRG: pixel = (b << 16) | (r << 8) | g; break;
 922                         case BGR: pixel = (b << 16) | (g << 8) | r; break;
 923                         case GRB: pixel = (g << 16) | (r << 8) | b; break;
 924                         case GBR: pixel = (g << 16) | (b << 8) | r; break;
 925                     }
 926                     gdk_image_put_pixel( data_image, x, y, pixel );
 927                     break;
 928                 }
 929                 default: break;
 930             }
 931         } // for
 932     }  // for
 933
 934     // Blit picture
 935
 936     GdkGC *data_gc = gdk_gc_new( GetPixmap() );
 937
 938     gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 939
 940     gdk_image_destroy( data_image );
 941     gdk_gc_unref( data_gc );
 942
 943     // Blit mask
 944
 945     if (image.HasMask())
 946     {
 947         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 948
 949         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 950
 951         gdk_image_destroy( mask_image );
 952         gdk_gc_unref( mask_gc );
 953     }
 954
 955     return true;
 956 }
 957
 958 wxImage wxBitmap::ConvertToImage() const
 959 {
 960     wxImage image;
 961
 962     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 963
 964     image.Create(GetWidth(), GetHeight());
 965     unsigned char *data = image.GetData();
 966
 967     if (!data)
 968     {
 969         wxFAIL_MSG( wxT("couldn't create image") );
 970         return wxNullImage;
 971     }
 972
 973     // the colour used as transparent one in wxImage and the one it is
 974     // replaced with when it really occurs in the bitmap
 975     static const int MASK_RED = 1;
 976     static const int MASK_GREEN = 2;
 977     static const int MASK_BLUE = 3;
 978     static const int MASK_BLUE_REPLACEMENT = 2;
 979
 980     GdkImage *gdk_image = NULL;
 981
 982     if (HasPixmap())
 983     {
 984         gdk_image = gdk_image_get( GetPixmap(),
 985                                     0, 0,
 986                                     GetWidth(), GetHeight() );
 987     }
 988     else if (GetBitmap())
 989     {
 990         gdk_image = gdk_image_get( GetBitmap(),
 991                                     0, 0,
 992                                     GetWidth(), GetHeight() );
 993     }
 994     else
 995     {
 996         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 997     }
 998
 999     wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
1000
1001     GdkImage *gdk_image_mask = NULL;
1002     if (GetMask())
1003     {
1004         gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
1005                                         0, 0,
1006                                         GetWidth(), GetHeight() );
1007
1008         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1009     }
1010
1011     int bpp = -1;
1012     int red_shift_right = 0;
1013     int green_shift_right = 0;
1014     int blue_shift_right = 0;
1015     int red_shift_left = 0;
1016     int green_shift_left = 0;
1017     int blue_shift_left = 0;
1018     bool use_shift = false;
1019
1020     if (GetPixmap())
1021     {
1022         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
1023         if (visual == NULL)
1024             visual = wxTheApp->GetGdkVisual();
1025
1026         bpp = visual->depth;
1027         if (bpp == 16)
1028             bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
1029         red_shift_right = visual->red_shift;
1030         red_shift_left = 8-visual->red_prec;
1031         green_shift_right = visual->green_shift;
1032         green_shift_left = 8-visual->green_prec;
1033         blue_shift_right = visual->blue_shift;
1034         blue_shift_left = 8-visual->blue_prec;
1035
1036         use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
1037     }
1038     if (GetBitmap())
1039     {
1040         bpp = 1;
1041     }
1042
1043
1044     GdkColormap *cmap = gtk_widget_get_default_colormap();
1045
1046     long pos = 0;
1047     for (int j = 0; j < GetHeight(); j++)
1048     {
1049         for (int i = 0; i < GetWidth(); i++)
1050         {
1051             wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
1052             if (bpp == 1)
1053             {
1054                 if (pixel == 0)
1055                 {
1056                     data[pos]   = 0;
1057                     data[pos+1] = 0;
1058                     data[pos+2] = 0;
1059                 }
1060                 else
1061                 {
1062                     data[pos]   = 255;
1063                     data[pos+1] = 255;
1064                     data[pos+2] = 255;
1065                 }
1066             }
1067             else if (use_shift)
1068             {
1069                 data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
1070                 data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
1071                 data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
1072             }
1073             else if (cmap->colors)
1074             {
1075                 data[pos] =   cmap->colors[pixel].red   >> 8;
1076                 data[pos+1] = cmap->colors[pixel].green >> 8;
1077                 data[pos+2] = cmap->colors[pixel].blue  >> 8;
1078             }
1079             else
1080             {
1081                 wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
1082             }
1083
1084             if (gdk_image_mask)
1085             {
1086                 int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
1087                 if (mask_pixel == 0)
1088                 {
1089                     data[pos] = MASK_RED;
1090                     data[pos+1] = MASK_GREEN;
1091                     data[pos+2] = MASK_BLUE;
1092                 }
1093                 else if ( data[pos] == MASK_RED &&
1094                             data[pos+1] == MASK_GREEN &&
1095                                 data[pos+2] == MASK_BLUE )
1096                 {
1097                     data[pos+2] = MASK_BLUE_REPLACEMENT;
1098                 }
1099             }
1100
1101             pos += 3;
1102         }
1103     }
1104
1105     gdk_image_destroy( gdk_image );
1106     if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
1107
1108     return image;
1109 }
1110
1111 wxBitmap::wxBitmap( const wxString &filename, wxBitmapType type )
1112 {
1113     LoadFile( filename, type );
1114 }
1115
1116 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
1117 {
1118     if ( width > 0 && height > 0 )
1119     {
1120         m_refData = new wxBitmapRefData();
1121
1122         M_BMPDATA->m_mask = NULL;
1123         M_BMPDATA->m_bitmap = gdk_bitmap_create_from_data
1124                               (
1125                                 wxGetRootWindow()->window,
1126                                 (gchar *) bits,
1127                                 width,
1128                                 height
1129                               );
1130         M_BMPDATA->m_width = width;
1131         M_BMPDATA->m_height = height;
1132         M_BMPDATA->m_bpp = 1;
1133
1134         wxASSERT_MSG( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
1135     }
1136 }
1137
1138 wxBitmap::~wxBitmap()
1139 {
1140 }
1141
1142 int wxBitmap::GetHeight() const
1143 {
1144     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1145
1146     return M_BMPDATA->m_height;
1147 }
1148
1149 int wxBitmap::GetWidth() const
1150 {
1151     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1152
1153     return M_BMPDATA->m_width;
1154 }
1155
1156 int wxBitmap::GetDepth() const
1157 {
1158     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1159
1160     return M_BMPDATA->m_bpp;
1161 }
1162
1163 wxMask *wxBitmap::GetMask() const
1164 {
1165     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
1166
1167     return M_BMPDATA->m_mask;
1168 }
1169
1170 void wxBitmap::SetMask( wxMask *mask )
1171 {
1172     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
1173
1174     AllocExclusive();
1175     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
1176
1177     M_BMPDATA->m_mask = mask;
1178 }
1179
1180 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
1181 {
1182     *this = icon;
1183     return true;
1184 }
1185
1186 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1187 {
1188     wxCHECK_MSG( Ok() &&
1189                  (rect.x >= 0) && (rect.y >= 0) &&
1190                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
1191                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1192
1193     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
1194     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1195
1196     if (ret.GetPixmap())
1197     {
1198         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1199         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1200         gdk_gc_destroy( gc );
1201     }
1202     else
1203     {
1204         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
1205         GdkColor col;
1206         col.pixel = 0xFFFFFF;
1207         gdk_gc_set_foreground( gc, &col );
1208         col.pixel = 0;
1209         gdk_gc_set_background( gc, &col );
1210         gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1211         gdk_gc_destroy( gc );
1212     }
1213
1214     if (GetMask())
1215     {
1216         wxMask *mask = new wxMask;
1217         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
1218
1219         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
1220         GdkColor col;
1221         col.pixel = 0xFFFFFF;
1222         gdk_gc_set_foreground( gc, &col );
1223         col.pixel = 0;
1224         gdk_gc_set_background( gc, &col );
1225         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height );
1226         gdk_gc_destroy( gc );
1227
1228         ret.SetMask( mask );
1229     }
1230
1231     return ret;
1232 }
1233
1234 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
1235 {
1236     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1237
1238     // Try to save the bitmap via wxImage handlers:
1239     {
1240         wxImage image = ConvertToImage();
1241         if (image.Ok()) return image.SaveFile( name, type );
1242     }
1243
1244     return false;
1245 }
1246
1247 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
1248 {
1249     UnRef();
1250
1251     if (!wxFileExists(name))
1252         return false;
1253
1254     GdkVisual *visual = wxTheApp->GetGdkVisual();
1255
1256     if (type == wxBITMAP_TYPE_XPM)
1257     {
1258         m_refData = new wxBitmapRefData();
1259
1260         GdkBitmap *mask = NULL;
1261
1262         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
1263                               (
1264                                 wxGetRootWindow()->window,
1265                                 &mask,
1266                                 NULL,
1267                                 name.fn_str()
1268                               );
1269
1270         if (mask)
1271         {
1272            M_BMPDATA->m_mask = new wxMask();
1273            M_BMPDATA->m_mask->m_bitmap = mask;
1274         }
1275
1276         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
1277
1278         M_BMPDATA->m_bpp = visual->depth;
1279     }
1280     else // try if wxImage can load it
1281     {
1282         wxImage image;
1283         if ( !image.LoadFile( name, type ) || !image.Ok() )
1284             return false;
1285
1286         *this = wxBitmap(image);
1287     }
1288
1289     return true;
1290 }
1291
1292 #if wxUSE_PALETTE
1293 wxPalette *wxBitmap::GetPalette() const
1294 {
1295     if (!Ok())
1296         return NULL;
1297
1298     return M_BMPDATA->m_palette;
1299 }
1300
1301 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
1302 {
1303     // TODO
1304 }
1305 #endif // wxUSE_PALETTE
1306
1307 void wxBitmap::SetHeight( int height )
1308 {
1309     AllocExclusive();
1310     M_BMPDATA->m_height = height;
1311 }
1312
1313 void wxBitmap::SetWidth( int width )
1314 {
1315     AllocExclusive();
1316     M_BMPDATA->m_width = width;
1317 }
1318
1319 void wxBitmap::SetDepth( int depth )
1320 {
1321     AllocExclusive();
1322     M_BMPDATA->m_bpp = depth;
1323 }
1324
1325 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1326 {
1327     if (!m_refData)
1328         m_refData = new wxBitmapRefData();
1329
1330     M_BMPDATA->m_pixmap = pixmap;
1331 }
1332
1333 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
1334 {
1335     if (!m_refData)
1336         m_refData = new wxBitmapRefData();
1337
1338     M_BMPDATA->m_bitmap = bitmap;
1339 }
1340
1341 GdkPixmap *wxBitmap::GetPixmap() const
1342 {
1343     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
1344
1345     return M_BMPDATA->m_pixmap;
1346 }
1347
1348 bool wxBitmap::HasPixmap() const
1349 {
1350     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1351
1352     return M_BMPDATA->m_pixmap != NULL;
1353 }
1354
1355 GdkBitmap *wxBitmap::GetBitmap() const
1356 {
1357     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
1358
1359     return M_BMPDATA->m_bitmap;
1360 }
1361
1362 void *wxBitmap::GetRawData(wxPixelDataBase& WXUNUSED(data), int WXUNUSED(bpp))
1363 {
1364     return NULL;
1365 }
1366
1367 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
1368 {
1369 }
1370
1371 bool wxBitmap::HasAlpha() const
1372 {
1373     return false;
1374 }
1375
1376 /* static */ void wxBitmap::InitStandardHandlers()
1377 {
1378     // TODO: Insert handler based on GdkPixbufs handler later
1379 }