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