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.IsOk()) 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.IsOk()) 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 //-----------------------------------------------------------------------------
 225 // wxBitmapRefData
 226 //-----------------------------------------------------------------------------
 227
 228 class wxBitmapRefData : public wxGDIRefData
 229 {
 230 public:
 231     wxBitmapRefData();
 232     wxBitmapRefData(const wxBitmapRefData& data);
 233     bool Create(int width, int height, int bpp);
 234     virtual ~wxBitmapRefData();
 235
 236     virtual bool IsOk() const { return m_pixmap || m_bitmap; }
 237
 238     GdkPixmap      *m_pixmap;
 239     GdkBitmap      *m_bitmap;
 240     wxMask         *m_mask;
 241     int             m_width;
 242     int             m_height;
 243     int             m_bpp;
 244 #if wxUSE_PALETTE
 245     wxPalette      *m_palette;
 246 #endif // wxUSE_PALETTE
 247 };
 248
 249 wxBitmapRefData::wxBitmapRefData()
 250 {
 251     m_pixmap = NULL;
 252     m_bitmap = NULL;
 253     m_mask = NULL;
 254     m_width = 0;
 255     m_height = 0;
 256     m_bpp = 0;
 257 #if wxUSE_PALETTE
 258     m_palette = NULL;
 259 #endif // wxUSE_PALETTE
 260 }
 261
 262 wxBitmapRefData::wxBitmapRefData(const wxBitmapRefData& data)
 263 {
 264     Create(data.m_width, data.m_height, data.m_bpp);
 265
 266     m_mask = data.m_mask ? new wxMask(*data.m_mask) : NULL;
 267
 268 #if wxUSE_PALETTE
 269     wxASSERT_MSG( !data.m_palette,
 270                   wxT("copying bitmaps palette not implemented") );
 271 #endif // wxUSE_PALETTE
 272
 273
 274     // copy the bitmap data by simply drawing the source bitmap on this one
 275     GdkPixmap **dst;
 276     if ( data.m_pixmap )
 277     {
 278         dst = &m_pixmap;
 279     }
 280     else if ( data.m_bitmap )
 281     {
 282         dst = &m_bitmap;
 283     }
 284     else // invalid bitmap?
 285     {
 286         return;
 287     }
 288
 289     GdkGC *gc = gdk_gc_new(*dst);
 290     if ( m_bpp == 1 )
 291     {
 292         gdk_wx_draw_bitmap(m_bitmap, gc, data.m_bitmap, 0, 0, 0, 0, -1, -1);
 293     }
 294     else // colour pixmap
 295     {
 296         gdk_draw_pixmap(m_pixmap, gc, data.m_pixmap, 0, 0, 0, 0, -1, -1);
 297     }
 298
 299     gdk_gc_unref(gc);
 300 }
 301
 302 bool wxBitmapRefData::Create(int width, int height, int bpp)
 303 {
 304     m_width = width;
 305     m_height = height;
 306     m_bpp = bpp;
 307
 308     m_mask = NULL;
 309 #if wxUSE_PALETTE
 310     m_palette = NULL;
 311 #endif
 312
 313     // to understand how this compiles you should know that GdkPixmap and
 314     // GdkBitmap are one and the same type in GTK+ 1
 315     GdkPixmap **ppix;
 316     if ( m_bpp != 1 )
 317     {
 318         const GdkVisual * const visual = wxTheApp->GetGdkVisual();
 319
 320         wxCHECK_MSG( (bpp == -1) || (bpp == visual->depth) || (bpp == 32), false,
 321                         wxT("invalid bitmap depth") );
 322
 323         m_bpp = visual->depth;
 324
 325         ppix = &m_pixmap;
 326         m_bitmap = NULL;
 327     }
 328     else // mono bitmap
 329     {
 330         ppix = &m_bitmap;
 331         m_pixmap = NULL;
 332     }
 333
 334     *ppix = gdk_pixmap_new( wxGetRootWindow()->window, width, height, m_bpp );
 335
 336     return *ppix != NULL;
 337 }
 338
 339 wxBitmapRefData::~wxBitmapRefData()
 340 {
 341     if (m_pixmap)
 342         gdk_pixmap_unref( m_pixmap );
 343     if (m_bitmap)
 344         gdk_bitmap_unref( m_bitmap );
 345     delete m_mask;
 346 #if wxUSE_PALETTE
 347     delete m_palette;
 348 #endif // wxUSE_PALETTE
 349 }
 350
 351
 352 //-----------------------------------------------------------------------------
 353 // wxBitmap
 354 //-----------------------------------------------------------------------------
 355
 356 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 357
 358 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 359
 360 wxGDIRefData *wxBitmap::CreateGDIRefData() const
 361 {
 362     return new wxBitmapRefData;
 363 }
 364
 365 wxGDIRefData *wxBitmap::CloneGDIRefData(const wxGDIRefData *data) const
 366 {
 367     return new wxBitmapRefData(*static_cast<const wxBitmapRefData *>(data));
 368 }
 369
 370 bool wxBitmap::Create( int width, int height, int depth )
 371 {
 372     UnRef();
 373
 374     if ( width <= 0 || height <= 0 )
 375     {
 376         return false;
 377     }
 378
 379     m_refData = new wxBitmapRefData();
 380     return M_BMPDATA->Create(width, height, depth);
 381 }
 382
 383 wxBitmap::wxBitmap(const char* const* bits)
 384 {
 385     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 386
 387     GdkVisual *visual = wxTheApp->GetGdkVisual();
 388
 389     m_refData = new wxBitmapRefData();
 390
 391     GdkBitmap *mask = NULL;
 392
 393     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxGetRootWindow()->window, &mask, NULL, (gchar **) bits );
 394
 395     wxCHECK2_MSG(M_BMPDATA->m_pixmap, return, wxT("couldn't create pixmap"));
 396
 397     if (mask)
 398     {
 399         M_BMPDATA->m_mask = new wxMask();
 400         M_BMPDATA->m_mask->m_bitmap = mask;
 401     }
 402
 403     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 404
 405     M_BMPDATA->m_bpp = visual->depth;  // Can we get a different depth from create_from_xpm_d() ?
 406 }
 407
 408 wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
 409 {
 410     wxCHECK_MSG( IsOk(), wxNullBitmap, wxT("invalid bitmap") );
 411
 412     if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 413         return *this;
 414
 415     int width = wxMax(newx, 1);
 416     int height = wxMax(newy, 1);
 417     width = wxMin(width, clipwidth);
 418     height = wxMin(height, clipheight);
 419
 420     wxBitmap bmp;
 421
 422     GdkImage *img = NULL;
 423     if (GetPixmap())
 424         img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
 425     else if (GetBitmap())
 426         img = gdk_image_get( GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 427     else
 428         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 429
 430     wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
 431
 432     int bpp = -1;
 433
 434
 435     GdkGC *gc = NULL;
 436     GdkPixmap *dstpix = NULL;
 437     if (GetPixmap())
 438     {
 439         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 440         if (visual == NULL)
 441             visual = wxTheApp->GetGdkVisual();
 442
 443         bpp = visual->depth;
 444         bmp = wxBitmap(width,height,bpp);
 445         dstpix = bmp.GetPixmap();
 446         gc = gdk_gc_new( dstpix );
 447     }
 448
 449     char *dst = NULL;
 450     long dstbyteperline = 0;
 451
 452     if (GetBitmap())
 453     {
 454         bpp = 1;
 455         dstbyteperline = width/8*M_BMPDATA->m_bpp;
 456         if (width*M_BMPDATA->m_bpp % 8 != 0)
 457             dstbyteperline++;
 458         dst = (char*) malloc(dstbyteperline*height);
 459     }
 460
 461     // be careful to use the right scaling factor
 462     float scx = (float)M_BMPDATA->m_width/(float)newx;
 463     float scy = (float)M_BMPDATA->m_height/(float)newy;
 464     // prepare accel-tables
 465     int *tablex = (int *)calloc(width,sizeof(int));
 466     int *tabley = (int *)calloc(height,sizeof(int));
 467
 468     // accel table filled with clipped values
 469     for (int x = 0; x < width; x++)
 470         tablex[x] = (int) (scx * (x+clipx));
 471     for (int y = 0; y < height; y++)
 472         tabley[y] = (int) (scy * (y+clipy));
 473
 474     // Main rescaling routine starts here
 475     for (int h = 0; h < height; h++)
 476     {
 477         char outbyte = 0;
 478         int old_x = -1;
 479         guint32 old_pixval = 0;
 480
 481         for (int w = 0; w < width; w++)
 482         {
 483             guint32 pixval;
 484             int x = tablex[w];
 485             if (x == old_x)
 486                 pixval = old_pixval;
 487             else
 488             {
 489                 pixval = gdk_image_get_pixel( img, x, tabley[h] );
 490                 old_pixval = pixval;
 491                 old_x = x;
 492             }
 493
 494             if (bpp == 1)
 495             {
 496                 if (!pixval)
 497                 {
 498                     char bit=1;
 499                     char shift = bit << (w % 8);
 500                     outbyte |= shift;
 501                 }
 502
 503                 if ((w+1)%8==0)
 504                 {
 505                     dst[h*dstbyteperline+w/8] = outbyte;
 506                     outbyte = 0;
 507                 }
 508             }
 509             else
 510             {
 511                 GdkColor col;
 512                 col.pixel = pixval;
 513                 gdk_gc_set_foreground( gc, &col );
 514                 gdk_draw_point( dstpix, gc, w, h);
 515             }
 516         }
 517
 518         // do not forget the last byte
 519         if ((bpp == 1) && (width % 8 != 0))
 520             dst[h*dstbyteperline+width/8] = outbyte;
 521     }
 522
 523     gdk_image_destroy( img );
 524     if (gc) gdk_gc_unref( gc );
 525
 526     if (bpp == 1)
 527     {
 528         bmp = wxBitmap( (const char *)dst, width, height, 1 );
 529         free( dst );
 530     }
 531
 532     if (GetMask())
 533     {
 534         dstbyteperline = width/8;
 535         if (width % 8 != 0)
 536             dstbyteperline++;
 537         dst = (char*) malloc(dstbyteperline*height);
 538         img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 539
 540         for (int h = 0; h < height; h++)
 541         {
 542             char outbyte = 0;
 543             int old_x = -1;
 544             guint32 old_pixval = 0;
 545
 546             for (int w = 0; w < width; w++)
 547             {
 548                 guint32 pixval;
 549                 int x = tablex[w];
 550                 if (x == old_x)
 551                     pixval = old_pixval;
 552                 else
 553                 {
 554                     pixval = gdk_image_get_pixel( img, x, tabley[h] );
 555                     old_pixval = pixval;
 556                     old_x = x;
 557                 }
 558
 559                 if (pixval)
 560                 {
 561                     char bit=1;
 562                     char shift = bit << (w % 8);
 563                     outbyte |= shift;
 564                 }
 565
 566                 if ((w+1)%8 == 0)
 567                 {
 568                     dst[h*dstbyteperline+w/8] = outbyte;
 569                     outbyte = 0;
 570                 }
 571             }
 572
 573             // do not forget the last byte
 574             if (width % 8 != 0)
 575                 dst[h*dstbyteperline+width/8] = outbyte;
 576         }
 577         wxMask* mask = new wxMask;
 578         mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
 579         bmp.SetMask(mask);
 580
 581         free( dst );
 582         gdk_image_destroy( img );
 583     }
 584
 585     free( tablex );
 586     free( tabley );
 587
 588     return bmp;
 589 }
 590
 591 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 592 {
 593     UnRef();
 594
 595     wxCHECK_MSG( image.IsOk(), false, wxT("invalid image") );
 596     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 597
 598     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 599         return false;
 600
 601     m_refData = new wxBitmapRefData();
 602
 603     if (depth == 1)
 604     {
 605         return CreateFromImageAsBitmap(image);
 606     }
 607     else
 608     {
 609         return CreateFromImageAsPixmap(image);
 610     }
 611 }
 612
 613 // conversion to mono bitmap:
 614 bool wxBitmap::CreateFromImageAsBitmap(const wxImage& img)
 615 {
 616     // convert alpha channel to mask, if it is present:
 617     wxImage image(img);
 618     image.ConvertAlphaToMask();
 619
 620     int width = image.GetWidth();
 621     int height = image.GetHeight();
 622
 623     SetHeight( height );
 624     SetWidth( width );
 625
 626     SetBitmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 627
 628     SetDepth( 1 );
 629
 630     GdkVisual *visual = wxTheApp->GetGdkVisual();
 631
 632     // Create picture image
 633
 634     unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 635
 636     GdkImage *data_image =
 637         gdk_image_new_bitmap( visual, data_data, width, height );
 638
 639     // Create mask image
 640
 641     GdkImage *mask_image = NULL;
 642
 643     if (image.HasMask())
 644     {
 645         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 646
 647         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 648
 649         wxMask *mask = new wxMask();
 650         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 651
 652         SetMask( mask );
 653     }
 654
 655     int r_mask = image.GetMaskRed();
 656     int g_mask = image.GetMaskGreen();
 657     int b_mask = image.GetMaskBlue();
 658
 659     unsigned char* data = image.GetData();
 660
 661     int index = 0;
 662     for (int y = 0; y < height; y++)
 663     {
 664         for (int x = 0; x < width; x++)
 665         {
 666             int r = data[index];
 667             index++;
 668             int g = data[index];
 669             index++;
 670             int b = data[index];
 671             index++;
 672
 673             if (image.HasMask())
 674             {
 675                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 676                     gdk_image_put_pixel( mask_image, x, y, 1 );
 677                 else
 678                     gdk_image_put_pixel( mask_image, x, y, 0 );
 679             }
 680
 681             if ((r == 255) && (b == 255) && (g == 255))
 682                 gdk_image_put_pixel( data_image, x, y, 1 );
 683             else
 684                 gdk_image_put_pixel( data_image, x, y, 0 );
 685
 686         } // for
 687     }  // for
 688
 689     // Blit picture
 690
 691     GdkGC *data_gc = gdk_gc_new( GetBitmap() );
 692
 693     gdk_draw_image( GetBitmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 694
 695     gdk_image_destroy( data_image );
 696     gdk_gc_unref( data_gc );
 697
 698     // Blit mask
 699
 700     if (image.HasMask())
 701     {
 702         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 703
 704         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 705
 706         gdk_image_destroy( mask_image );
 707         gdk_gc_unref( mask_gc );
 708     }
 709
 710     return true;
 711 }
 712
 713 // conversion to colour bitmap:
 714 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& img)
 715 {
 716     // convert alpha channel to mask, if it is present:
 717     wxImage image(img);
 718     image.ConvertAlphaToMask();
 719
 720     int width = image.GetWidth();
 721     int height = image.GetHeight();
 722
 723     SetHeight( height );
 724     SetWidth( width );
 725
 726     SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 727
 728     GdkVisual *visual = wxTheApp->GetGdkVisual();
 729
 730     int bpp = visual->depth;
 731
 732     SetDepth( bpp );
 733
 734     if ((bpp == 16) && (visual->red_mask != 0xf800))
 735         bpp = 15;
 736     else if (bpp < 8)
 737         bpp = 8;
 738
 739     // We handle 8-bit bitmaps ourselves using the colour cube, 12-bit
 740     // visuals are not supported by GDK so we do these ourselves, too.
 741     // 15-bit and 16-bit should actually work and 24-bit certainly does.
 742 #ifdef __sgi
 743     if (!image.HasMask() && (bpp > 16))
 744 #else
 745     if (!image.HasMask() && (bpp > 12))
 746 #endif
 747     {
 748         static bool s_hasInitialized = false;
 749
 750         if (!s_hasInitialized)
 751         {
 752             gdk_rgb_init();
 753             s_hasInitialized = true;
 754         }
 755
 756         GdkGC *gc = gdk_gc_new( GetPixmap() );
 757
 758         gdk_draw_rgb_image( GetPixmap(),
 759                             gc,
 760                             0, 0,
 761                             width, height,
 762                             GDK_RGB_DITHER_NONE,
 763                             image.GetData(),
 764                             width*3 );
 765
 766         gdk_gc_unref( gc );
 767         return true;
 768     }
 769
 770     // Create picture image
 771
 772     GdkImage *data_image =
 773         gdk_image_new( GDK_IMAGE_FASTEST, visual, width, height );
 774
 775     // Create mask image
 776
 777     GdkImage *mask_image = NULL;
 778
 779     if (image.HasMask())
 780     {
 781         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 782
 783         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 784
 785         wxMask *mask = new wxMask();
 786         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 787
 788         SetMask( mask );
 789     }
 790
 791     // Render
 792
 793     enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
 794     byte_order b_o = RGB;
 795
 796     if (bpp > 8)
 797     {
 798         if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
 799         else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RBG;
 800         else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
 801         else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
 802         else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
 803         else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
 804     }
 805
 806     int r_mask = image.GetMaskRed();
 807     int g_mask = image.GetMaskGreen();
 808     int b_mask = image.GetMaskBlue();
 809
 810     unsigned char* data = image.GetData();
 811
 812     int index = 0;
 813     for (int y = 0; y < height; y++)
 814     {
 815         for (int x = 0; x < width; x++)
 816         {
 817             int r = data[index];
 818             index++;
 819             int g = data[index];
 820             index++;
 821             int b = data[index];
 822             index++;
 823
 824             if (image.HasMask())
 825             {
 826                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 827                     gdk_image_put_pixel( mask_image, x, y, 1 );
 828                 else
 829                     gdk_image_put_pixel( mask_image, x, y, 0 );
 830             }
 831
 832             switch (bpp)
 833             {
 834                 case 8:
 835                 {
 836                     int pixel = -1;
 837                     if (wxTheApp->m_colorCube)
 838                     {
 839                         pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
 840                     }
 841                     else
 842                     {
 843                         GdkColormap *cmap = gtk_widget_get_default_colormap();
 844                         GdkColor *colors = cmap->colors;
 845                         int max = 3 * (65536);
 846
 847                         for (int i = 0; i < cmap->size; i++)
 848                         {
 849                             int rdiff = (r << 8) - colors[i].red;
 850                             int gdiff = (g << 8) - colors[i].green;
 851                             int bdiff = (b << 8) - colors[i].blue;
 852                             int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 853                             if (sum < max) { pixel = i; max = sum; }
 854                         }
 855                     }
 856
 857                     gdk_image_put_pixel( data_image, x, y, pixel );
 858
 859                     break;
 860                 }
 861                 case 12:  // SGI only
 862                 {
 863                     guint32 pixel = 0;
 864                     switch (b_o)
 865                     {
 866                         case RGB: pixel = ((r & 0xf0) << 4) | (g & 0xf0) | ((b & 0xf0) >> 4); break;
 867                         case RBG: pixel = ((r & 0xf0) << 4) | (b & 0xf0) | ((g & 0xf0) >> 4); break;
 868                         case GRB: pixel = ((g & 0xf0) << 4) | (r & 0xf0) | ((b & 0xf0) >> 4); break;
 869                         case GBR: pixel = ((g & 0xf0) << 4) | (b & 0xf0) | ((r & 0xf0) >> 4); break;
 870                         case BRG: pixel = ((b & 0xf0) << 4) | (r & 0xf0) | ((g & 0xf0) >> 4); break;
 871                         case BGR: pixel = ((b & 0xf0) << 4) | (g & 0xf0) | ((r & 0xf0) >> 4); break;
 872                     }
 873                     gdk_image_put_pixel( data_image, x, y, pixel );
 874                     break;
 875                 }
 876                 case 15:
 877                 {
 878                     guint32 pixel = 0;
 879                     switch (b_o)
 880                     {
 881                         case RGB: pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 882                         case RBG: pixel = ((r & 0xf8) << 7) | ((b & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 883                         case GRB: pixel = ((g & 0xf8) << 7) | ((r & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 884                         case GBR: pixel = ((g & 0xf8) << 7) | ((b & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 885                         case BRG: pixel = ((b & 0xf8) << 7) | ((r & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 886                         case BGR: pixel = ((b & 0xf8) << 7) | ((g & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 887                     }
 888                     gdk_image_put_pixel( data_image, x, y, pixel );
 889                     break;
 890                 }
 891                 case 16:
 892                 {
 893                     // I actually don't know if for 16-bit displays, it is alway the green
 894                     // component or the second component which has 6 bits.
 895                     guint32 pixel = 0;
 896                     switch (b_o)
 897                     {
 898                         case RGB: pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 899                         case RBG: pixel = ((r & 0xf8) << 8) | ((b & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 900                         case GRB: pixel = ((g & 0xf8) << 8) | ((r & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 901                         case GBR: pixel = ((g & 0xf8) << 8) | ((b & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 902                         case BRG: pixel = ((b & 0xf8) << 8) | ((r & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 903                         case BGR: pixel = ((b & 0xf8) << 8) | ((g & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 904                     }
 905                     gdk_image_put_pixel( data_image, x, y, pixel );
 906                     break;
 907                 }
 908                 case 32:
 909                 case 24:
 910                 {
 911                     guint32 pixel = 0;
 912                     switch (b_o)
 913                     {
 914                         case RGB: pixel = (r << 16) | (g << 8) | b; break;
 915                         case RBG: pixel = (r << 16) | (b << 8) | g; break;
 916                         case BRG: pixel = (b << 16) | (r << 8) | g; break;
 917                         case BGR: pixel = (b << 16) | (g << 8) | r; break;
 918                         case GRB: pixel = (g << 16) | (r << 8) | b; break;
 919                         case GBR: pixel = (g << 16) | (b << 8) | r; break;
 920                     }
 921                     gdk_image_put_pixel( data_image, x, y, pixel );
 922                     break;
 923                 }
 924                 default: break;
 925             }
 926         } // for
 927     }  // for
 928
 929     // Blit picture
 930
 931     GdkGC *data_gc = gdk_gc_new( GetPixmap() );
 932
 933     gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 934
 935     gdk_image_destroy( data_image );
 936     gdk_gc_unref( data_gc );
 937
 938     // Blit mask
 939
 940     if (image.HasMask())
 941     {
 942         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 943
 944         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 945
 946         gdk_image_destroy( mask_image );
 947         gdk_gc_unref( mask_gc );
 948     }
 949
 950     return true;
 951 }
 952
 953 wxImage wxBitmap::ConvertToImage() const
 954 {
 955     wxImage image;
 956
 957     wxCHECK_MSG( IsOk(), wxNullImage, wxT("invalid bitmap") );
 958
 959     image.Create(GetWidth(), GetHeight());
 960     unsigned char *data = image.GetData();
 961
 962     if (!data)
 963     {
 964         wxFAIL_MSG( wxT("couldn't create image") );
 965         return wxNullImage;
 966     }
 967
 968     // the colour used as transparent one in wxImage and the one it is
 969     // replaced with when it really occurs in the bitmap
 970     static const int MASK_RED = 1;
 971     static const int MASK_GREEN = 2;
 972     static const int MASK_BLUE = 3;
 973     static const int MASK_BLUE_REPLACEMENT = 2;
 974
 975     GdkImage *gdk_image = NULL;
 976
 977     if (HasPixmap())
 978     {
 979         gdk_image = gdk_image_get( GetPixmap(),
 980                                     0, 0,
 981                                     GetWidth(), GetHeight() );
 982     }
 983     else if (GetBitmap())
 984     {
 985         gdk_image = gdk_image_get( GetBitmap(),
 986                                     0, 0,
 987                                     GetWidth(), GetHeight() );
 988     }
 989     else
 990     {
 991         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 992     }
 993
 994     wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
 995
 996     GdkImage *gdk_image_mask = NULL;
 997     if (GetMask())
 998     {
 999         gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
1000                                         0, 0,
1001                                         GetWidth(), GetHeight() );
1002
1003         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
1004     }
1005
1006     int bpp = -1;
1007     int red_shift_right = 0;
1008     int green_shift_right = 0;
1009     int blue_shift_right = 0;
1010     int red_shift_left = 0;
1011     int green_shift_left = 0;
1012     int blue_shift_left = 0;
1013     bool use_shift = false;
1014
1015     if (GetPixmap())
1016     {
1017         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
1018         if (visual == NULL)
1019             visual = wxTheApp->GetGdkVisual();
1020
1021         bpp = visual->depth;
1022         if (bpp == 16)
1023             bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
1024         red_shift_right = visual->red_shift;
1025         red_shift_left = 8-visual->red_prec;
1026         green_shift_right = visual->green_shift;
1027         green_shift_left = 8-visual->green_prec;
1028         blue_shift_right = visual->blue_shift;
1029         blue_shift_left = 8-visual->blue_prec;
1030
1031         use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
1032     }
1033     if (GetBitmap())
1034     {
1035         bpp = 1;
1036     }
1037
1038
1039     GdkColormap *cmap = gtk_widget_get_default_colormap();
1040
1041     long pos = 0;
1042     for (int j = 0; j < GetHeight(); j++)
1043     {
1044         for (int i = 0; i < GetWidth(); i++)
1045         {
1046             wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
1047             if (bpp == 1)
1048             {
1049                 if (pixel == 0)
1050                 {
1051                     data[pos]   = 0;
1052                     data[pos+1] = 0;
1053                     data[pos+2] = 0;
1054                 }
1055                 else
1056                 {
1057                     data[pos]   = 255;
1058                     data[pos+1] = 255;
1059                     data[pos+2] = 255;
1060                 }
1061             }
1062             else if (use_shift)
1063             {
1064                 data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
1065                 data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
1066                 data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
1067             }
1068             else if (cmap->colors)
1069             {
1070                 data[pos] =   cmap->colors[pixel].red   >> 8;
1071                 data[pos+1] = cmap->colors[pixel].green >> 8;
1072                 data[pos+2] = cmap->colors[pixel].blue  >> 8;
1073             }
1074             else
1075             {
1076                 wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
1077             }
1078
1079             if (gdk_image_mask)
1080             {
1081                 int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
1082                 if (mask_pixel == 0)
1083                 {
1084                     data[pos] = MASK_RED;
1085                     data[pos+1] = MASK_GREEN;
1086                     data[pos+2] = MASK_BLUE;
1087                 }
1088                 else if ( data[pos] == MASK_RED &&
1089                             data[pos+1] == MASK_GREEN &&
1090                                 data[pos+2] == MASK_BLUE )
1091                 {
1092                     data[pos+2] = MASK_BLUE_REPLACEMENT;
1093                 }
1094             }
1095
1096             pos += 3;
1097         }
1098     }
1099
1100     gdk_image_destroy( gdk_image );
1101     if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
1102
1103     return image;
1104 }
1105
1106 wxBitmap::wxBitmap( const wxString &filename, wxBitmapType type )
1107 {
1108     LoadFile( filename, type );
1109 }
1110
1111 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
1112 {
1113     if ( width > 0 && height > 0 )
1114     {
1115         m_refData = new wxBitmapRefData();
1116
1117         M_BMPDATA->m_mask = NULL;
1118         M_BMPDATA->m_bitmap = gdk_bitmap_create_from_data
1119                               (
1120                                 wxGetRootWindow()->window,
1121                                 (gchar *) bits,
1122                                 width,
1123                                 height
1124                               );
1125         M_BMPDATA->m_width = width;
1126         M_BMPDATA->m_height = height;
1127         M_BMPDATA->m_bpp = 1;
1128
1129         wxASSERT_MSG( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
1130     }
1131 }
1132
1133 wxBitmap::~wxBitmap()
1134 {
1135 }
1136
1137 int wxBitmap::GetHeight() const
1138 {
1139     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
1140
1141     return M_BMPDATA->m_height;
1142 }
1143
1144 int wxBitmap::GetWidth() const
1145 {
1146     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
1147
1148     return M_BMPDATA->m_width;
1149 }
1150
1151 int wxBitmap::GetDepth() const
1152 {
1153     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
1154
1155     return M_BMPDATA->m_bpp;
1156 }
1157
1158 wxMask *wxBitmap::GetMask() const
1159 {
1160     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
1161
1162     return M_BMPDATA->m_mask;
1163 }
1164
1165 void wxBitmap::SetMask( wxMask *mask )
1166 {
1167     wxCHECK_RET( IsOk(), wxT("invalid bitmap") );
1168
1169     AllocExclusive();
1170     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
1171
1172     M_BMPDATA->m_mask = mask;
1173 }
1174
1175 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
1176 {
1177     *this = icon;
1178     return true;
1179 }
1180
1181 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1182 {
1183     wxCHECK_MSG( IsOk() &&
1184                  (rect.x >= 0) && (rect.y >= 0) &&
1185                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
1186                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1187
1188     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
1189     wxASSERT_MSG( ret.IsOk(), wxT("GetSubBitmap error") );
1190
1191     if (ret.GetPixmap())
1192     {
1193         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1194         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1195         gdk_gc_destroy( gc );
1196     }
1197     else
1198     {
1199         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
1200         GdkColor col;
1201         col.pixel = 0xFFFFFF;
1202         gdk_gc_set_foreground( gc, &col );
1203         col.pixel = 0;
1204         gdk_gc_set_background( gc, &col );
1205         gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1206         gdk_gc_destroy( gc );
1207     }
1208
1209     if (GetMask())
1210     {
1211         wxMask *mask = new wxMask;
1212         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
1213
1214         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
1215         GdkColor col;
1216         col.pixel = 0xFFFFFF;
1217         gdk_gc_set_foreground( gc, &col );
1218         col.pixel = 0;
1219         gdk_gc_set_background( gc, &col );
1220         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height );
1221         gdk_gc_destroy( gc );
1222
1223         ret.SetMask( mask );
1224     }
1225
1226     return ret;
1227 }
1228
1229 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
1230 {
1231     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
1232
1233     // Try to save the bitmap via wxImage handlers:
1234     {
1235         wxImage image = ConvertToImage();
1236         if (image.IsOk()) return image.SaveFile( name, type );
1237     }
1238
1239     return false;
1240 }
1241
1242 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
1243 {
1244     UnRef();
1245
1246     if (!wxFileExists(name))
1247         return false;
1248
1249     GdkVisual *visual = wxTheApp->GetGdkVisual();
1250
1251     if (type == wxBITMAP_TYPE_XPM)
1252     {
1253         m_refData = new wxBitmapRefData();
1254
1255         GdkBitmap *mask = NULL;
1256
1257         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
1258                               (
1259                                 wxGetRootWindow()->window,
1260                                 &mask,
1261                                 NULL,
1262                                 name.fn_str()
1263                               );
1264
1265         if (mask)
1266         {
1267            M_BMPDATA->m_mask = new wxMask();
1268            M_BMPDATA->m_mask->m_bitmap = mask;
1269         }
1270
1271         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
1272
1273         M_BMPDATA->m_bpp = visual->depth;
1274     }
1275     else // try if wxImage can load it
1276     {
1277         wxImage image;
1278         if ( !image.LoadFile( name, type ) || !image.IsOk() )
1279             return false;
1280
1281         *this = wxBitmap(image);
1282     }
1283
1284     return true;
1285 }
1286
1287 #if wxUSE_PALETTE
1288 wxPalette *wxBitmap::GetPalette() const
1289 {
1290     if (!IsOk())
1291         return NULL;
1292
1293     return M_BMPDATA->m_palette;
1294 }
1295
1296 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
1297 {
1298     // TODO
1299 }
1300 #endif // wxUSE_PALETTE
1301
1302 void wxBitmap::SetHeight( int height )
1303 {
1304     AllocExclusive();
1305     M_BMPDATA->m_height = height;
1306 }
1307
1308 void wxBitmap::SetWidth( int width )
1309 {
1310     AllocExclusive();
1311     M_BMPDATA->m_width = width;
1312 }
1313
1314 void wxBitmap::SetDepth( int depth )
1315 {
1316     AllocExclusive();
1317     M_BMPDATA->m_bpp = depth;
1318 }
1319
1320 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1321 {
1322     if (!m_refData)
1323         m_refData = new wxBitmapRefData();
1324
1325     M_BMPDATA->m_pixmap = pixmap;
1326 }
1327
1328 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
1329 {
1330     if (!m_refData)
1331         m_refData = new wxBitmapRefData();
1332
1333     M_BMPDATA->m_bitmap = bitmap;
1334 }
1335
1336 GdkPixmap *wxBitmap::GetPixmap() const
1337 {
1338     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
1339
1340     return M_BMPDATA->m_pixmap;
1341 }
1342
1343 bool wxBitmap::HasPixmap() const
1344 {
1345     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
1346
1347     return M_BMPDATA->m_pixmap != NULL;
1348 }
1349
1350 GdkBitmap *wxBitmap::GetBitmap() const
1351 {
1352     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
1353
1354     return M_BMPDATA->m_bitmap;
1355 }
1356
1357 void *wxBitmap::GetRawData(wxPixelDataBase& WXUNUSED(data), int WXUNUSED(bpp))
1358 {
1359     return NULL;
1360 }
1361
1362 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
1363 {
1364 }
1365
1366 bool wxBitmap::HasAlpha() const
1367 {
1368     return false;
1369 }
1370
1371 /* static */ void wxBitmap::InitStandardHandlers()
1372 {
1373     // TODO: Insert handler based on GdkPixbufs handler later
1374 }