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