src/gtk1/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "bitmap.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #include "wx/defs.h"
  18
  19 #include "wx/palette.h"
  20 #include "wx/bitmap.h"
  21 #include "wx/icon.h"
  22 #include "wx/filefn.h"
  23 #include "wx/image.h"
  24 #include "wx/dcmemory.h"
  25 #include "wx/app.h"
  26
  27 #ifdef __WXGTK20__
  28     // need this to get gdk_image_new_bitmap()
  29     #define GDK_ENABLE_BROKEN
  30 #endif
  31
  32 #include <gdk/gdk.h>
  33 #include <gtk/gtk.h>
  34 #include <gdk/gdkx.h>
  35
  36 #ifdef __WXGTK20__
  37     #include <gdk/gdkimage.h>
  38 #else // GTK+ 1.2
  39     #include <gdk/gdkrgb.h>
  40 #endif // GTK+ 2.0/1.2
  41
  42 #include <math.h>
  43
  44 extern void gdk_wx_draw_bitmap     (GdkDrawable  *drawable,
  45                           GdkGC               *gc,
  46                           GdkDrawable  *src,
  47                           gint                xsrc,
  48                           gint                ysrc,
  49                           gint                xdest,
  50                           gint                ydest,
  51                           gint                width,
  52                           gint                height);
  53
  54 //-----------------------------------------------------------------------------
  55 // data
  56 //-----------------------------------------------------------------------------
  57
  58 extern GtkWidget *wxGetRootWindow();
  59
  60 //-----------------------------------------------------------------------------
  61 // wxMask
  62 //-----------------------------------------------------------------------------
  63
  64 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  65
  66 wxMask::wxMask()
  67 {
  68     m_bitmap = (GdkBitmap *) NULL;
  69 }
  70
  71 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  72 {
  73     m_bitmap = (GdkBitmap *) NULL;
  74     Create( bitmap, colour );
  75 }
  76
  77 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  78 {
  79     m_bitmap = (GdkBitmap *) NULL;
  80     Create( bitmap, paletteIndex );
  81 }
  82
  83 wxMask::wxMask( const wxBitmap& bitmap )
  84 {
  85     m_bitmap = (GdkBitmap *) NULL;
  86     Create( bitmap );
  87 }
  88
  89 wxMask::~wxMask()
  90 {
  91     if (m_bitmap)
  92         gdk_bitmap_unref( m_bitmap );
  93 }
  94
  95 bool wxMask::Create( const wxBitmap& bitmap,
  96                      const wxColour& colour )
  97 {
  98     if (m_bitmap)
  99     {
 100         gdk_bitmap_unref( m_bitmap );
 101         m_bitmap = (GdkBitmap*) NULL;
 102     }
 103
 104     wxImage image = bitmap.ConvertToImage();
 105     if (!image.Ok()) return FALSE;
 106
 107     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, image.GetWidth(), image.GetHeight(), 1 );
 108     GdkGC *gc = gdk_gc_new( m_bitmap );
 109
 110     GdkColor color;
 111     color.red = 65000;
 112     color.green = 65000;
 113     color.blue = 65000;
 114     color.pixel = 1;
 115     gdk_gc_set_foreground( gc, &color );
 116     gdk_gc_set_fill( gc, GDK_SOLID );
 117     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
 118
 119     unsigned char *data = image.GetData();
 120     int index = 0;
 121
 122     unsigned char red = colour.Red();
 123     unsigned char green = colour.Green();
 124     unsigned char blue = colour.Blue();
 125
 126     GdkVisual *visual = wxTheApp->GetGdkVisual();
 127
 128     int bpp = visual->depth;
 129     if ((bpp == 16) && (visual->red_mask != 0xf800))
 130         bpp = 15;
 131     if (bpp == 15)
 132     {
 133         red = red & 0xf8;
 134         green = green & 0xf8;
 135         blue = blue & 0xf8;
 136     }
 137     else if (bpp == 16)
 138     {
 139         red = red & 0xf8;
 140         green = green & 0xfc;
 141         blue = blue & 0xf8;
 142     }
 143     else if (bpp == 12)
 144     {
 145         red = red & 0xf0;
 146         green = green & 0xf0;
 147         blue = blue & 0xf0;
 148     }
 149
 150     color.red = 0;
 151     color.green = 0;
 152     color.blue = 0;
 153     color.pixel = 0;
 154     gdk_gc_set_foreground( gc, &color );
 155
 156     for (int j = 0; j < image.GetHeight(); j++)
 157     {
 158         int start_x = -1;
 159         int i;
 160         for (i = 0; i < image.GetWidth(); i++)
 161         {
 162             if ((data[index] == red) &&
 163                 (data[index+1] == green) &&
 164                 (data[index+2] == blue))
 165             {
 166                 if (start_x == -1)
 167                 start_x = i;
 168             }
 169             else
 170             {
 171                 if (start_x != -1)
 172                 {
 173                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 174                     start_x = -1;
 175                 }
 176             }
 177             index += 3;
 178         }
 179         if (start_x != -1)
 180             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 181     }
 182
 183     gdk_gc_unref( gc );
 184
 185     return TRUE;
 186 }
 187
 188 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 189 {
 190     unsigned char r,g,b;
 191     wxPalette *pal = bitmap.GetPalette();
 192
 193     wxCHECK_MSG( pal, FALSE, wxT("Cannot create mask from bitmap without palette") );
 194
 195     pal->GetRGB(paletteIndex, &r, &g, &b);
 196
 197     return Create(bitmap, wxColour(r, g, b));
 198 }
 199
 200 bool wxMask::Create( const wxBitmap& bitmap )
 201 {
 202     if (m_bitmap)
 203     {
 204         gdk_bitmap_unref( m_bitmap );
 205         m_bitmap = (GdkBitmap*) NULL;
 206     }
 207
 208     if (!bitmap.Ok()) return FALSE;
 209
 210     wxCHECK_MSG( bitmap.GetBitmap(), FALSE, wxT("Cannot create mask from colour bitmap") );
 211
 212     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 213
 214     if (!m_bitmap) return FALSE;
 215
 216     GdkGC *gc = gdk_gc_new( m_bitmap );
 217
 218     gdk_wx_draw_bitmap( m_bitmap, gc, bitmap.GetBitmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
 219
 220     gdk_gc_unref( gc );
 221
 222     return TRUE;
 223 }
 224
 225 GdkBitmap *wxMask::GetBitmap() const
 226 {
 227     return m_bitmap;
 228 }
 229
 230 //-----------------------------------------------------------------------------
 231 // wxBitmap
 232 //-----------------------------------------------------------------------------
 233
 234 class wxBitmapRefData: public wxObjectRefData
 235 {
 236 public:
 237     wxBitmapRefData();
 238     ~wxBitmapRefData();
 239
 240     GdkPixmap      *m_pixmap;
 241     GdkBitmap      *m_bitmap;
 242     wxMask         *m_mask;
 243     int             m_width;
 244     int             m_height;
 245     int             m_bpp;
 246     wxPalette      *m_palette;
 247 };
 248
 249 wxBitmapRefData::wxBitmapRefData()
 250 {
 251     m_pixmap = (GdkPixmap *) NULL;
 252     m_bitmap = (GdkBitmap *) NULL;
 253     m_mask = (wxMask *) NULL;
 254     m_width = 0;
 255     m_height = 0;
 256     m_bpp = 0;
 257     m_palette = (wxPalette *) NULL;
 258 }
 259
 260 wxBitmapRefData::~wxBitmapRefData()
 261 {
 262     if (m_pixmap)
 263         gdk_pixmap_unref( m_pixmap );
 264     if (m_bitmap)
 265         gdk_bitmap_unref( m_bitmap );
 266     delete m_mask;
 267     delete m_palette;
 268 }
 269
 270 //-----------------------------------------------------------------------------
 271
 272 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 273
 274 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 275
 276 wxBitmap::wxBitmap()
 277 {
 278 }
 279
 280 wxBitmap::wxBitmap( int width, int height, int depth )
 281 {
 282     Create( width, height, depth );
 283 }
 284
 285 bool wxBitmap::Create( int width, int height, int depth )
 286 {
 287     UnRef();
 288
 289     if ( width <= 0 || height <= 0 )
 290     {
 291         return false;
 292     }
 293
 294     GdkVisual *visual = wxTheApp->GetGdkVisual();
 295
 296     if (depth == -1)
 297         depth = visual->depth;
 298
 299     wxCHECK_MSG( (depth == visual->depth) || (depth == 1), FALSE,
 300                     wxT("invalid bitmap depth") )
 301
 302     m_refData = new wxBitmapRefData();
 303     M_BMPDATA->m_mask = (wxMask *) NULL;
 304     M_BMPDATA->m_width = width;
 305     M_BMPDATA->m_height = height;
 306     if (depth == 1)
 307     {
 308         M_BMPDATA->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 309         M_BMPDATA->m_bpp = 1;
 310     }
 311     else
 312     {
 313         M_BMPDATA->m_pixmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, depth );
 314         M_BMPDATA->m_bpp = visual->depth;
 315     }
 316
 317     return Ok();
 318 }
 319
 320 bool wxBitmap::CreateFromXpm( const char **bits )
 321 {
 322     UnRef();
 323
 324     wxCHECK_MSG( bits != NULL, FALSE, wxT("invalid bitmap data") )
 325
 326     GdkVisual *visual = wxTheApp->GetGdkVisual();
 327
 328     m_refData = new wxBitmapRefData();
 329
 330     GdkBitmap *mask = (GdkBitmap*) NULL;
 331
 332     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxGetRootWindow()->window, &mask, NULL, (gchar **) bits );
 333
 334     wxCHECK_MSG( M_BMPDATA->m_pixmap, FALSE, wxT("couldn't create pixmap") );
 335
 336     if (mask)
 337     {
 338         M_BMPDATA->m_mask = new wxMask();
 339         M_BMPDATA->m_mask->m_bitmap = mask;
 340     }
 341
 342     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 343
 344     M_BMPDATA->m_bpp = visual->depth;  // Can we get a different depth from create_from_xpm_d() ?
 345
 346     return TRUE;
 347 }
 348
 349 wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
 350 {
 351     wxCHECK_MSG( Ok(), wxNullBitmap, wxT("invalid bitmap") );
 352
 353     if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 354         return *this;
 355
 356     GdkImage *img = (GdkImage*) NULL;
 357     if (GetPixmap())
 358         img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
 359     else if (GetBitmap())
 360         img = gdk_image_get( GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 361     else
 362         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 363
 364     wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
 365
 366     wxBitmap bmp;
 367     int bpp = -1;
 368
 369     int width = wxMax(newx, 1);
 370     int height = wxMax(newy, 1);
 371     width = wxMin(width, clipwidth);
 372     height = wxMin(height, clipheight);
 373
 374     GdkGC *gc = NULL;
 375     GdkPixmap *dstpix = NULL;
 376     if (GetPixmap())
 377     {
 378         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 379         if (visual == NULL)
 380             visual = wxTheApp->GetGdkVisual();
 381
 382         bpp = visual->depth;
 383         bmp = wxBitmap(width,height,bpp);
 384         dstpix = bmp.GetPixmap();
 385         gc = gdk_gc_new( dstpix );
 386     }
 387
 388     char *dst = NULL;
 389     long dstbyteperline = 0;
 390
 391     if (GetBitmap())
 392     {
 393         bpp = 1;
 394         dstbyteperline = width/8*M_BMPDATA->m_bpp;
 395         if (width*M_BMPDATA->m_bpp % 8 != 0)
 396             dstbyteperline++;
 397         dst = (char*) malloc(dstbyteperline*height);
 398     }
 399
 400     // be careful to use the right scaling factor
 401     float scx = (float)M_BMPDATA->m_width/(float)newx;
 402     float scy = (float)M_BMPDATA->m_height/(float)newy;
 403     // prepare accel-tables
 404     int *tablex = (int *)calloc(width,sizeof(int));
 405     int *tabley = (int *)calloc(height,sizeof(int));
 406
 407     // accel table filled with clipped values
 408     for (int x = 0; x < width; x++)
 409         tablex[x] = (int) (scx * (x+clipx));
 410     for (int y = 0; y < height; y++)
 411         tabley[y] = (int) (scy * (y+clipy));
 412
 413     // Main rescaling routine starts here
 414     for (int h = 0; h < height; h++)
 415     {
 416         char outbyte = 0;
 417
 418         for (int w=0; w<width; w++)
 419         {
 420             guint32 pixval = gdk_image_get_pixel( img, tablex[w], tabley[h] );
 421             if (bpp==1)
 422             {
 423                 if (!pixval)
 424                 {
 425                     char bit=1;
 426                     char shift = bit << w % 8;
 427                     outbyte |= shift;
 428                 }
 429
 430                 if ((w+1)%8==0)
 431                 {
 432                     dst[h*dstbyteperline+w/8]=~outbyte;
 433                     outbyte = 0;
 434                 }
 435             }
 436             else
 437             {
 438                 GdkColor col;
 439                 col.pixel = pixval;
 440                 gdk_gc_set_foreground( gc, &col );
 441                 gdk_draw_point( dstpix, gc, w, h);
 442             }
 443         }
 444
 445         // do not forget the last byte
 446         if (bpp == 1)
 447             dst[h*dstbyteperline+width/8] = ~outbyte;
 448     }
 449
 450     gdk_image_destroy( img );
 451     if (gc) gdk_gc_unref( gc );
 452
 453     if (bpp == 1)
 454     {
 455         bmp = wxBitmap( (const char *)dst, width, height, 1 );
 456         free( dst );
 457     }
 458
 459     if (GetMask())
 460     {
 461         bpp = 1;
 462         dstbyteperline = width/8*bpp;
 463         if (width*bpp % 8 != 0)
 464             dstbyteperline++;
 465         dst = (char*) malloc(dstbyteperline*height);
 466         img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 467
 468         for (int h = 0; h < height; h++)
 469         {
 470             char outbyte = 0;
 471
 472             for (int w=0; w<width; w++)
 473             {
 474                 guint32 pixval = gdk_image_get_pixel( img, tablex[w], tabley[h] );
 475                 if (pixval)
 476                 {
 477                     char bit=1;
 478                     char shift = bit << w % 8;
 479                     outbyte |= shift;
 480                 }
 481
 482                 if ((w+1)%8==0)
 483                 {
 484                     dst[h*dstbyteperline+w/8]=~outbyte;
 485                     outbyte = 0;
 486                 }
 487             }
 488
 489             // do not forget the last byte
 490             if (bpp == 1)
 491                 dst[h*dstbyteperline+width/8] = ~outbyte;
 492         }
 493
 494         wxBitmap mask_bmp( (const char *)dst, width, height, 1 );
 495         wxMask* mask = new wxMask(mask_bmp);
 496         bmp.SetMask(mask);
 497
 498         free( dst );
 499         gdk_image_destroy( img );
 500     }
 501
 502     free( tablex );
 503     free( tabley );
 504
 505     return bmp;
 506 }
 507
 508 bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
 509 {
 510     UnRef();
 511
 512     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
 513     wxCHECK_MSG( depth == -1 || depth == 1, FALSE, wxT("invalid bitmap depth") )
 514
 515     int width = image.GetWidth();
 516     int height = image.GetHeight();
 517
 518     if ( width <= 0 || height <= 0 )
 519     {
 520         return false;
 521     }
 522
 523     m_refData = new wxBitmapRefData();
 524
 525     SetHeight( height );
 526     SetWidth( width );
 527
 528     // ------
 529     // conversion to mono bitmap:
 530     // ------
 531     if (depth == 1)
 532     {
 533         SetBitmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 534
 535         SetDepth( 1 );
 536
 537         GdkVisual *visual = wxTheApp->GetGdkVisual();
 538
 539         // Create picture image
 540
 541         unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 542
 543         GdkImage *data_image =
 544             gdk_image_new_bitmap( visual, data_data, width, height );
 545
 546         // Create mask image
 547
 548         GdkImage *mask_image = (GdkImage*) NULL;
 549
 550         if (image.HasMask())
 551         {
 552             unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 553
 554             mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 555
 556             wxMask *mask = new wxMask();
 557             mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 558
 559             SetMask( mask );
 560         }
 561
 562         int r_mask = image.GetMaskRed();
 563         int g_mask = image.GetMaskGreen();
 564         int b_mask = image.GetMaskBlue();
 565
 566         unsigned char* data = image.GetData();
 567
 568         int index = 0;
 569         for (int y = 0; y < height; y++)
 570         {
 571             for (int x = 0; x < width; x++)
 572             {
 573                 int r = data[index];
 574                 index++;
 575                 int g = data[index];
 576                 index++;
 577                 int b = data[index];
 578                 index++;
 579
 580                 if (image.HasMask())
 581                 {
 582                     if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 583                         gdk_image_put_pixel( mask_image, x, y, 1 );
 584                     else
 585                         gdk_image_put_pixel( mask_image, x, y, 0 );
 586                 }
 587
 588                 if ((r == 255) && (b == 255) && (g == 255))
 589                     gdk_image_put_pixel( data_image, x, y, 1 );
 590                 else
 591                     gdk_image_put_pixel( data_image, x, y, 0 );
 592
 593             } // for
 594         }  // for
 595
 596         // Blit picture
 597
 598         GdkGC *data_gc = gdk_gc_new( GetBitmap() );
 599
 600         gdk_draw_image( GetBitmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 601
 602         gdk_image_destroy( data_image );
 603         gdk_gc_unref( data_gc );
 604
 605         // Blit mask
 606
 607         if (image.HasMask())
 608         {
 609             GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 610
 611             gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 612
 613             gdk_image_destroy( mask_image );
 614             gdk_gc_unref( mask_gc );
 615         }
 616     }
 617
 618     // ------
 619     // conversion to colour bitmap:
 620     // ------
 621     else
 622     {
 623         SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 624
 625         GdkVisual *visual = wxTheApp->GetGdkVisual();
 626
 627         int bpp = visual->depth;
 628
 629         SetDepth( bpp );
 630
 631         if ((bpp == 16) && (visual->red_mask != 0xf800))
 632             bpp = 15;
 633         else if (bpp < 8)
 634             bpp = 8;
 635
 636         // We handle 8-bit bitmaps ourselves using the colour cube, 12-bit
 637         // visuals are not supported by GDK so we do these ourselves, too.
 638         // 15-bit and 16-bit should actually work and 24-bit certainly does.
 639 #ifdef __sgi
 640         if (!image.HasMask() && (bpp > 16))
 641 #else
 642         if (!image.HasMask() && (bpp > 12))
 643 #endif
 644         {
 645             static bool s_hasInitialized = FALSE;
 646
 647             if (!s_hasInitialized)
 648             {
 649                 gdk_rgb_init();
 650                 s_hasInitialized = TRUE;
 651             }
 652
 653             GdkGC *gc = gdk_gc_new( GetPixmap() );
 654
 655             gdk_draw_rgb_image( GetPixmap(),
 656                                 gc,
 657                                 0, 0,
 658                                 width, height,
 659                                 GDK_RGB_DITHER_NONE,
 660                                 image.GetData(),
 661                                 width*3 );
 662
 663             gdk_gc_unref( gc );
 664             return TRUE;
 665         }
 666
 667         // Create picture image
 668
 669         GdkImage *data_image =
 670             gdk_image_new( GDK_IMAGE_FASTEST, visual, width, height );
 671
 672         // Create mask image
 673
 674         GdkImage *mask_image = (GdkImage*) NULL;
 675
 676         if (image.HasMask())
 677         {
 678             unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 679
 680             mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 681
 682             wxMask *mask = new wxMask();
 683             mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 684
 685             SetMask( mask );
 686         }
 687
 688         // Render
 689
 690         enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
 691         byte_order b_o = RGB;
 692
 693         if (bpp > 8)
 694         {
 695             if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
 696             else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RBG;
 697             else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
 698             else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
 699             else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
 700             else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
 701         }
 702
 703         int r_mask = image.GetMaskRed();
 704         int g_mask = image.GetMaskGreen();
 705         int b_mask = image.GetMaskBlue();
 706
 707         unsigned char* data = image.GetData();
 708
 709         int index = 0;
 710         for (int y = 0; y < height; y++)
 711         {
 712             for (int x = 0; x < width; x++)
 713             {
 714                 int r = data[index];
 715                 index++;
 716                 int g = data[index];
 717                 index++;
 718                 int b = data[index];
 719                 index++;
 720
 721                 if (image.HasMask())
 722                 {
 723                     if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 724                         gdk_image_put_pixel( mask_image, x, y, 1 );
 725                     else
 726                         gdk_image_put_pixel( mask_image, x, y, 0 );
 727                 }
 728
 729                 switch (bpp)
 730                 {
 731                     case 8:
 732                     {
 733                         int pixel = -1;
 734                         if (wxTheApp->m_colorCube)
 735                         {
 736                             pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
 737                         }
 738                         else
 739                         {
 740                             GdkColormap *cmap = gtk_widget_get_default_colormap();
 741                             GdkColor *colors = cmap->colors;
 742                             int max = 3 * (65536);
 743
 744                             for (int i = 0; i < cmap->size; i++)
 745                             {
 746                                 int rdiff = (r << 8) - colors[i].red;
 747                                 int gdiff = (g << 8) - colors[i].green;
 748                                 int bdiff = (b << 8) - colors[i].blue;
 749                                 int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 750                                 if (sum < max) { pixel = i; max = sum; }
 751                             }
 752                         }
 753
 754                         gdk_image_put_pixel( data_image, x, y, pixel );
 755
 756                         break;
 757                     }
 758                     case 12:  // SGI only
 759                     {
 760                         guint32 pixel = 0;
 761                         switch (b_o)
 762                         {
 763                             case RGB: pixel = ((r & 0xf0) << 4) | (g & 0xf0) | ((b & 0xf0) >> 4); break;
 764                             case RBG: pixel = ((r & 0xf0) << 4) | (b & 0xf0) | ((g & 0xf0) >> 4); break;
 765                             case GRB: pixel = ((g & 0xf0) << 4) | (r & 0xf0) | ((b & 0xf0) >> 4); break;
 766                             case GBR: pixel = ((g & 0xf0) << 4) | (b & 0xf0) | ((r & 0xf0) >> 4); break;
 767                             case BRG: pixel = ((b & 0xf0) << 4) | (r & 0xf0) | ((g & 0xf0) >> 4); break;
 768                             case BGR: pixel = ((b & 0xf0) << 4) | (g & 0xf0) | ((r & 0xf0) >> 4); break;
 769                         }
 770                         gdk_image_put_pixel( data_image, x, y, pixel );
 771                         break;
 772                     }
 773                     case 15:
 774                     {
 775                         guint32 pixel = 0;
 776                         switch (b_o)
 777                         {
 778                             case RGB: pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 779                             case RBG: pixel = ((r & 0xf8) << 7) | ((b & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 780                             case GRB: pixel = ((g & 0xf8) << 7) | ((r & 0xf8) << 2) | ((b & 0xf8) >> 3); break;
 781                             case GBR: pixel = ((g & 0xf8) << 7) | ((b & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 782                             case BRG: pixel = ((b & 0xf8) << 7) | ((r & 0xf8) << 2) | ((g & 0xf8) >> 3); break;
 783                             case BGR: pixel = ((b & 0xf8) << 7) | ((g & 0xf8) << 2) | ((r & 0xf8) >> 3); break;
 784                         }
 785                         gdk_image_put_pixel( data_image, x, y, pixel );
 786                         break;
 787                     }
 788                     case 16:
 789                     {
 790                         // I actually don't know if for 16-bit displays, it is alway the green
 791                         // component or the second component which has 6 bits.
 792                         guint32 pixel = 0;
 793                         switch (b_o)
 794                         {
 795                             case RGB: pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 796                             case RBG: pixel = ((r & 0xf8) << 8) | ((b & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 797                             case GRB: pixel = ((g & 0xf8) << 8) | ((r & 0xfc) << 3) | ((b & 0xf8) >> 3); break;
 798                             case GBR: pixel = ((g & 0xf8) << 8) | ((b & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 799                             case BRG: pixel = ((b & 0xf8) << 8) | ((r & 0xfc) << 3) | ((g & 0xf8) >> 3); break;
 800                             case BGR: pixel = ((b & 0xf8) << 8) | ((g & 0xfc) << 3) | ((r & 0xf8) >> 3); break;
 801                         }
 802                         gdk_image_put_pixel( data_image, x, y, pixel );
 803                         break;
 804                     }
 805                     case 32:
 806                     case 24:
 807                     {
 808                         guint32 pixel = 0;
 809                         switch (b_o)
 810                         {
 811                             case RGB: pixel = (r << 16) | (g << 8) | b; break;
 812                             case RBG: pixel = (r << 16) | (b << 8) | g; break;
 813                             case BRG: pixel = (b << 16) | (r << 8) | g; break;
 814                             case BGR: pixel = (b << 16) | (g << 8) | r; break;
 815                             case GRB: pixel = (g << 16) | (r << 8) | b; break;
 816                             case GBR: pixel = (g << 16) | (b << 8) | r; break;
 817                         }
 818                         gdk_image_put_pixel( data_image, x, y, pixel );
 819                     }
 820                     default: break;
 821                 }
 822             } // for
 823         }  // for
 824
 825         // Blit picture
 826
 827         GdkGC *data_gc = gdk_gc_new( GetPixmap() );
 828
 829         gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 830
 831         gdk_image_destroy( data_image );
 832         gdk_gc_unref( data_gc );
 833
 834         // Blit mask
 835
 836         if (image.HasMask())
 837         {
 838             GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 839
 840             gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 841
 842             gdk_image_destroy( mask_image );
 843             gdk_gc_unref( mask_gc );
 844         }
 845     }
 846
 847     return TRUE;
 848 }
 849
 850 wxImage wxBitmap::ConvertToImage() const
 851 {
 852     // the colour used as transparent one in wxImage and the one it is replaced
 853     // with when it really occurs in the bitmap
 854     static const int MASK_RED = 1;
 855     static const int MASK_GREEN = 2;
 856     static const int MASK_BLUE = 3;
 857     static const int MASK_BLUE_REPLACEMENT = 2;
 858
 859     wxImage image;
 860
 861     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 862
 863     GdkImage *gdk_image = (GdkImage*) NULL;
 864     if (GetPixmap())
 865     {
 866         gdk_image = gdk_image_get( GetPixmap(),
 867                                    0, 0,
 868                                    GetWidth(), GetHeight() );
 869     }
 870     else if (GetBitmap())
 871     {
 872         gdk_image = gdk_image_get( GetBitmap(),
 873                                    0, 0,
 874                                    GetWidth(), GetHeight() );
 875     }
 876     else
 877     {
 878         wxFAIL_MSG( wxT("Ill-formed bitmap") );
 879     }
 880
 881     wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
 882
 883     image.Create( GetWidth(), GetHeight() );
 884     char unsigned *data = image.GetData();
 885
 886     if (!data)
 887     {
 888         gdk_image_destroy( gdk_image );
 889         wxFAIL_MSG( wxT("couldn't create image") );
 890         return wxNullImage;
 891     }
 892
 893     GdkImage *gdk_image_mask = (GdkImage*) NULL;
 894     if (GetMask())
 895     {
 896         gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
 897                                         0, 0,
 898                                         GetWidth(), GetHeight() );
 899
 900         image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
 901     }
 902
 903     int bpp = -1;
 904     int red_shift_right = 0;
 905     int green_shift_right = 0;
 906     int blue_shift_right = 0;
 907     int red_shift_left = 0;
 908     int green_shift_left = 0;
 909     int blue_shift_left = 0;
 910     bool use_shift = FALSE;
 911
 912     if (GetPixmap())
 913     {
 914         GdkVisual *visual = gdk_window_get_visual( GetPixmap() );
 915         if (visual == NULL)
 916             visual = wxTheApp->GetGdkVisual();
 917
 918         bpp = visual->depth;
 919         if (bpp == 16)
 920             bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
 921         red_shift_right = visual->red_shift;
 922         red_shift_left = 8-visual->red_prec;
 923         green_shift_right = visual->green_shift;
 924         green_shift_left = 8-visual->green_prec;
 925         blue_shift_right = visual->blue_shift;
 926         blue_shift_left = 8-visual->blue_prec;
 927
 928         use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
 929     }
 930     if (GetBitmap())
 931     {
 932         bpp = 1;
 933     }
 934
 935
 936     GdkColormap *cmap = gtk_widget_get_default_colormap();
 937
 938     long pos = 0;
 939     for (int j = 0; j < GetHeight(); j++)
 940     {
 941         for (int i = 0; i < GetWidth(); i++)
 942         {
 943             wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
 944             if (bpp == 1)
 945             {
 946                 if (pixel == 0)
 947                 {
 948                     data[pos]   = 0;
 949                     data[pos+1] = 0;
 950                     data[pos+2] = 0;
 951                 }
 952                 else
 953                 {
 954                     data[pos]   = 255;
 955                     data[pos+1] = 255;
 956                     data[pos+2] = 255;
 957                 }
 958             }
 959             else if (use_shift)
 960             {
 961                 data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
 962                 data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
 963                 data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
 964             }
 965             else if (cmap->colors)
 966             {
 967                 data[pos] =   cmap->colors[pixel].red   >> 8;
 968                 data[pos+1] = cmap->colors[pixel].green >> 8;
 969                 data[pos+2] = cmap->colors[pixel].blue  >> 8;
 970             }
 971             else
 972             {
 973                 wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
 974             }
 975
 976             if (gdk_image_mask)
 977             {
 978                 int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
 979                 if (mask_pixel == 0)
 980                 {
 981                     data[pos] = MASK_RED;
 982                     data[pos+1] = MASK_GREEN;
 983                     data[pos+2] = MASK_BLUE;
 984                 }
 985                 else if ( data[pos] == MASK_RED &&
 986                             data[pos+1] == MASK_GREEN &&
 987                                 data[pos+2] == MASK_BLUE )
 988                 {
 989                     data[pos+2] = MASK_BLUE_REPLACEMENT;
 990                 }
 991             }
 992
 993             pos += 3;
 994         }
 995     }
 996
 997     gdk_image_destroy( gdk_image );
 998     if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
 999
1000     return image;
1001 }
1002
1003 wxBitmap::wxBitmap( const wxBitmap& bmp )
1004         : wxGDIObject()
1005 {
1006     Ref( bmp );
1007 }
1008
1009 wxBitmap::wxBitmap( const wxString &filename, int type )
1010 {
1011     LoadFile( filename, type );
1012 }
1013
1014 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
1015 {
1016     if ( width > 0 && height > 0 )
1017     {
1018         m_refData = new wxBitmapRefData();
1019
1020         M_BMPDATA->m_mask = (wxMask *) NULL;
1021         M_BMPDATA->m_bitmap = gdk_bitmap_create_from_data
1022                               (
1023                                 wxGetRootWindow()->window,
1024                                 (gchar *) bits,
1025                                 width,
1026                                 height
1027                               );
1028         M_BMPDATA->m_width = width;
1029         M_BMPDATA->m_height = height;
1030         M_BMPDATA->m_bpp = 1;
1031
1032         wxASSERT_MSG( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
1033     }
1034 }
1035
1036 wxBitmap::~wxBitmap()
1037 {
1038 }
1039
1040 wxBitmap& wxBitmap::operator = ( const wxBitmap& bmp )
1041 {
1042     if ( m_refData != bmp.m_refData )
1043         Ref( bmp );
1044
1045     return *this;
1046 }
1047
1048 bool wxBitmap::operator == ( const wxBitmap& bmp ) const
1049 {
1050     return m_refData == bmp.m_refData;
1051 }
1052
1053 bool wxBitmap::operator != ( const wxBitmap& bmp ) const
1054 {
1055     return m_refData != bmp.m_refData;
1056 }
1057
1058 bool wxBitmap::Ok() const
1059 {
1060     return (m_refData != NULL);
1061 }
1062
1063 int wxBitmap::GetHeight() const
1064 {
1065     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1066
1067     return M_BMPDATA->m_height;
1068 }
1069
1070 int wxBitmap::GetWidth() const
1071 {
1072     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1073
1074     return M_BMPDATA->m_width;
1075 }
1076
1077 int wxBitmap::GetDepth() const
1078 {
1079     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1080
1081     return M_BMPDATA->m_bpp;
1082 }
1083
1084 wxMask *wxBitmap::GetMask() const
1085 {
1086     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1087
1088     return M_BMPDATA->m_mask;
1089 }
1090
1091 void wxBitmap::SetMask( wxMask *mask )
1092 {
1093     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
1094
1095     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
1096
1097     M_BMPDATA->m_mask = mask;
1098 }
1099
1100 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
1101 {
1102     *this = icon;
1103     return TRUE;
1104 }
1105
1106 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1107 {
1108     wxCHECK_MSG( Ok() &&
1109                  (rect.x >= 0) && (rect.y >= 0) &&
1110                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
1111                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1112
1113     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
1114     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1115
1116     if (ret.GetPixmap())
1117     {
1118         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1119         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1120         gdk_gc_destroy( gc );
1121     }
1122     else
1123     {
1124         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
1125         gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1126         gdk_gc_destroy( gc );
1127     }
1128
1129     if (GetMask())
1130     {
1131         wxMask *mask = new wxMask;
1132         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
1133
1134         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
1135         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, 0, 0, rect.x, rect.y, rect.width, rect.height );
1136         gdk_gc_destroy( gc );
1137
1138         ret.SetMask( mask );
1139     }
1140
1141     return ret;
1142 }
1143
1144 bool wxBitmap::SaveFile( const wxString &name, int type, wxPalette *WXUNUSED(palette) )
1145 {
1146     wxCHECK_MSG( Ok(), FALSE, wxT("invalid bitmap") );
1147
1148     // Try to save the bitmap via wxImage handlers:
1149     {
1150         wxImage image = ConvertToImage();
1151         if (image.Ok()) return image.SaveFile( name, type );
1152     }
1153
1154     return FALSE;
1155 }
1156
1157 bool wxBitmap::LoadFile( const wxString &name, int type )
1158 {
1159     UnRef();
1160
1161     if (!wxFileExists(name))
1162         return FALSE;
1163
1164     GdkVisual *visual = wxTheApp->GetGdkVisual();
1165
1166     if (type == wxBITMAP_TYPE_XPM)
1167     {
1168         m_refData = new wxBitmapRefData();
1169
1170         GdkBitmap *mask = (GdkBitmap*) NULL;
1171
1172         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
1173                               (
1174                                 wxGetRootWindow()->window,
1175                                 &mask,
1176                                 NULL,
1177                                 name.fn_str()
1178                               );
1179
1180         if (mask)
1181         {
1182            M_BMPDATA->m_mask = new wxMask();
1183            M_BMPDATA->m_mask->m_bitmap = mask;
1184         }
1185
1186         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
1187
1188         M_BMPDATA->m_bpp = visual->depth;
1189     }
1190     else // try if wxImage can load it
1191     {
1192         wxImage image;
1193         if ( !image.LoadFile( name, type ) || !image.Ok() )
1194             return FALSE;
1195
1196         *this = wxBitmap(image);
1197     }
1198
1199     return TRUE;
1200 }
1201
1202 wxPalette *wxBitmap::GetPalette() const
1203 {
1204     if (!Ok())
1205         return (wxPalette *) NULL;
1206
1207     return M_BMPDATA->m_palette;
1208 }
1209
1210 void wxBitmap::SetHeight( int height )
1211 {
1212     if (!m_refData)
1213         m_refData = new wxBitmapRefData();
1214
1215     M_BMPDATA->m_height = height;
1216 }
1217
1218 void wxBitmap::SetWidth( int width )
1219 {
1220     if (!m_refData)
1221         m_refData = new wxBitmapRefData();
1222
1223     M_BMPDATA->m_width = width;
1224 }
1225
1226 void wxBitmap::SetDepth( int depth )
1227 {
1228     if (!m_refData)
1229         m_refData = new wxBitmapRefData();
1230
1231     M_BMPDATA->m_bpp = depth;
1232 }
1233
1234 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1235 {
1236     if (!m_refData)
1237         m_refData = new wxBitmapRefData();
1238
1239     M_BMPDATA->m_pixmap = pixmap;
1240 }
1241
1242 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
1243 {
1244     if (!m_refData)
1245         m_refData = new wxBitmapRefData();
1246
1247     M_BMPDATA->m_bitmap = bitmap;
1248 }
1249
1250 GdkPixmap *wxBitmap::GetPixmap() const
1251 {
1252     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
1253
1254     return M_BMPDATA->m_pixmap;
1255 }
1256
1257 GdkBitmap *wxBitmap::GetBitmap() const
1258 {
1259     wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, wxT("invalid bitmap") );
1260
1261     return M_BMPDATA->m_bitmap;
1262 }