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