src/gtk/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/bitmap.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/bitmap.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/icon.h"
  17     #include "wx/image.h"
  18     #include "wx/colour.h"
  19 #endif
  20
  21 #include "wx/rawbmp.h"
  22
  23 #include "wx/gtk/private/object.h"
  24
  25 #include <gtk/gtk.h>
  26
  27 extern GtkWidget *wxGetRootWindow();
  28
  29 static void PixmapToPixbuf(GdkPixmap* pixmap, GdkPixbuf* pixbuf, int w, int h)
  30 {
  31     gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
  32     if (gdk_drawable_get_depth(pixmap) == 1)
  33     {
  34         // invert to match XBM convention
  35         guchar* p = gdk_pixbuf_get_pixels(pixbuf);
  36         const int inc = 3 + int(gdk_pixbuf_get_has_alpha(pixbuf) != 0);
  37         const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - w * inc;
  38         for (int y = h; y; y--, p += rowpad)
  39             for (int x = w; x; x--, p += inc)
  40             {
  41                 // pixels are either (0,0,0) or (0xff,0xff,0xff)
  42                 p[0] = ~p[0];
  43                 p[1] = ~p[1];
  44                 p[2] = ~p[2];
  45             }
  46     }
  47 }
  48
  49 static void MaskToAlpha(GdkPixmap* mask, GdkPixbuf* pixbuf, int w, int h)
  50 {
  51     GdkPixbuf* mask_pixbuf = gdk_pixbuf_get_from_drawable(
  52         NULL, mask, NULL, 0, 0, 0, 0, w, h);
  53     guchar* p = gdk_pixbuf_get_pixels(pixbuf) + 3;
  54     const guchar* mask_data = gdk_pixbuf_get_pixels(mask_pixbuf);
  55     const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - w * 4;
  56     const int mask_rowpad = gdk_pixbuf_get_rowstride(mask_pixbuf) - w * 3;
  57     for (int y = h; y; y--, p += rowpad, mask_data += mask_rowpad)
  58     {
  59         for (int x = w; x; x--, p += 4, mask_data += 3)
  60         {
  61             *p = 255;
  62             // no need to test all 3 components,
  63             //   pixels are either (0,0,0) or (0xff,0xff,0xff)
  64             if (mask_data[0] == 0)
  65                 *p = 0;
  66         }
  67     }
  68     g_object_unref(mask_pixbuf);
  69 }
  70
  71 //-----------------------------------------------------------------------------
  72 // wxMask
  73 //-----------------------------------------------------------------------------
  74
  75 IMPLEMENT_DYNAMIC_CLASS(wxMask, wxMaskBase)
  76
  77 wxMask::wxMask()
  78 {
  79     m_bitmap = NULL;
  80 }
  81
  82 wxMask::wxMask(const wxMask& mask)
  83 {
  84     if ( !mask.m_bitmap )
  85     {
  86         m_bitmap = NULL;
  87         return;
  88     }
  89
  90     // create a copy of an existing mask
  91     gint w, h;
  92     gdk_drawable_get_size(mask.m_bitmap, &w, &h);
  93     m_bitmap = gdk_pixmap_new(mask.m_bitmap, w, h, 1);
  94
  95     wxGtkObject<GdkGC> gc(gdk_gc_new(m_bitmap));
  96     gdk_draw_drawable(m_bitmap, gc, mask.m_bitmap, 0, 0, 0, 0, -1, -1);
  97 }
  98
  99 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
 100 {
 101     m_bitmap = NULL;
 102     InitFromColour(bitmap, colour);
 103 }
 104
 105 #if wxUSE_PALETTE
 106 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
 107 {
 108     m_bitmap = NULL;
 109     Create( bitmap, paletteIndex );
 110 }
 111 #endif // wxUSE_PALETTE
 112
 113 wxMask::wxMask( const wxBitmap& bitmap )
 114 {
 115     m_bitmap = NULL;
 116     InitFromMonoBitmap(bitmap);
 117 }
 118
 119 wxMask::wxMask(GdkPixmap* bitmap)
 120 {
 121     m_bitmap = bitmap;
 122 }
 123
 124 wxMask::~wxMask()
 125 {
 126     if (m_bitmap)
 127         g_object_unref (m_bitmap);
 128 }
 129
 130 void wxMask::FreeData()
 131 {
 132     if (m_bitmap)
 133     {
 134         g_object_unref (m_bitmap);
 135         m_bitmap = NULL;
 136     }
 137 }
 138
 139 bool wxMask::InitFromColour(const wxBitmap& bitmap, const wxColour& colour)
 140 {
 141     const int w = bitmap.GetWidth();
 142     const int h = bitmap.GetHeight();
 143
 144     // create mask as XBM format bitmap
 145
 146     // one bit per pixel, each row starts on a byte boundary
 147     const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 148     wxByte* out = new wxByte[out_size];
 149     // set bits are unmasked
 150     memset(out, 0xff, out_size);
 151     unsigned bit_index = 0;
 152     if (bitmap.HasPixbuf())
 153     {
 154         const wxByte r_mask = colour.Red();
 155         const wxByte g_mask = colour.Green();
 156         const wxByte b_mask = colour.Blue();
 157         GdkPixbuf* pixbuf = bitmap.GetPixbuf();
 158         const wxByte* in = gdk_pixbuf_get_pixels(pixbuf);
 159         const int inc = 3 + int(gdk_pixbuf_get_has_alpha(pixbuf) != 0);
 160         const int rowpadding = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 161         for (int y = 0; y < h; y++, in += rowpadding)
 162         {
 163             for (int x = 0; x < w; x++, in += inc, bit_index++)
 164                 if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 165                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 166             // move index to next byte boundary
 167             bit_index = (bit_index + 7) & ~7u;
 168         }
 169     }
 170     else
 171     {
 172         GdkImage* image = gdk_drawable_get_image(bitmap.GetPixmap(), 0, 0, w, h);
 173         GdkColormap* colormap = gdk_image_get_colormap(image);
 174         guint32 mask_pixel;
 175         if (colormap == NULL)
 176             // mono bitmap, white is pixel value 0
 177             mask_pixel = guint32(colour.Red() != 255 || colour.Green() != 255 || colour.Blue() != 255);
 178         else
 179         {
 180             wxColor c(colour);
 181             c.CalcPixel(colormap);
 182             mask_pixel = c.GetPixel();
 183         }
 184         for (int y = 0; y < h; y++)
 185         {
 186             for (int x = 0; x < w; x++, bit_index++)
 187                 if (gdk_image_get_pixel(image, x, y) == mask_pixel)
 188                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 189             bit_index = (bit_index + 7) & ~7u;
 190         }
 191         g_object_unref(image);
 192     }
 193     m_bitmap = gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h);
 194     delete[] out;
 195     return true;
 196 }
 197
 198 bool wxMask::InitFromMonoBitmap(const wxBitmap& bitmap)
 199 {
 200     if (!bitmap.IsOk()) return false;
 201
 202     wxCHECK_MSG( bitmap.GetDepth() == 1, false, wxT("Cannot create mask from colour bitmap") );
 203
 204     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 205
 206     if (!m_bitmap) return false;
 207
 208     wxGtkObject<GdkGC> gc(gdk_gc_new( m_bitmap ));
 209     gdk_gc_set_function(gc, GDK_COPY_INVERT);
 210     gdk_draw_drawable(m_bitmap, gc, bitmap.GetPixmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight());
 211
 212     return true;
 213 }
 214
 215 GdkPixmap* wxMask::GetBitmap() const
 216 {
 217     return m_bitmap;
 218 }
 219
 220 //-----------------------------------------------------------------------------
 221 // wxBitmapRefData
 222 //-----------------------------------------------------------------------------
 223
 224 class wxBitmapRefData: public wxGDIRefData
 225 {
 226 public:
 227     wxBitmapRefData(int width, int height, int depth);
 228     virtual ~wxBitmapRefData();
 229
 230     virtual bool IsOk() const;
 231
 232     GdkPixmap      *m_pixmap;
 233     GdkPixbuf      *m_pixbuf;
 234     wxMask         *m_mask;
 235     int             m_width;
 236     int             m_height;
 237     int             m_bpp;
 238     bool m_alphaRequested;
 239
 240 private:
 241     // We don't provide a copy ctor as copying m_pixmap and m_pixbuf properly
 242     // is expensive and we don't want to do it implicitly (and possibly
 243     // accidentally). wxBitmap::CloneGDIRefData() which does need to do it does
 244     // it explicitly itself.
 245     wxDECLARE_NO_COPY_CLASS(wxBitmapRefData);
 246 };
 247
 248 wxBitmapRefData::wxBitmapRefData(int width, int height, int depth)
 249 {
 250     m_pixmap = NULL;
 251     m_pixbuf = NULL;
 252     m_mask = NULL;
 253     m_width = width;
 254     m_height = height;
 255     m_bpp = depth;
 256     if (m_bpp < 0)
 257         m_bpp = gdk_drawable_get_depth(wxGetRootWindow()->window);
 258     m_alphaRequested = depth == 32;
 259 }
 260
 261 wxBitmapRefData::~wxBitmapRefData()
 262 {
 263     if (m_pixmap)
 264         g_object_unref (m_pixmap);
 265     if (m_pixbuf)
 266         g_object_unref (m_pixbuf);
 267     delete m_mask;
 268 }
 269
 270 bool wxBitmapRefData::IsOk() const
 271 {
 272     return m_bpp != 0;
 273 }
 274
 275 //-----------------------------------------------------------------------------
 276 // wxBitmap
 277 //-----------------------------------------------------------------------------
 278
 279 #define M_BMPDATA static_cast<wxBitmapRefData*>(m_refData)
 280
 281 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 282
 283 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 284 {
 285     LoadFile(filename, type);
 286 }
 287
 288 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 289 {
 290     wxASSERT(depth == 1);
 291     if (width > 0 && height > 0 && depth == 1)
 292     {
 293         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 294     }
 295 }
 296
 297 wxBitmap::wxBitmap(const char* const* bits)
 298 {
 299     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 300
 301     GdkBitmap* mask = NULL;
 302     SetPixmap(gdk_pixmap_create_from_xpm_d(wxGetRootWindow()->window, &mask, NULL, const_cast<char**>(bits)));
 303     if (!M_BMPDATA)
 304         return;
 305
 306     if (M_BMPDATA->m_pixmap != NULL && mask != NULL)
 307     {
 308         M_BMPDATA->m_mask = new wxMask(mask);
 309     }
 310 }
 311
 312 wxBitmap::wxBitmap(GdkPixbuf* pixbuf)
 313 {
 314     if (pixbuf)
 315     {
 316         wxBitmapRefData* bmpData = new wxBitmapRefData(
 317             gdk_pixbuf_get_width(pixbuf), gdk_pixbuf_get_height(pixbuf),
 318             gdk_pixbuf_get_n_channels(pixbuf) * 8);
 319         m_refData = bmpData;
 320         bmpData->m_pixbuf = pixbuf;
 321     }
 322 }
 323
 324 wxBitmap::~wxBitmap()
 325 {
 326 }
 327
 328 bool wxBitmap::Create( int width, int height, int depth )
 329 {
 330     UnRef();
 331     wxCHECK_MSG(width >= 0 && height >= 0, false, "invalid bitmap size");
 332     m_refData = new wxBitmapRefData(width, height, depth);
 333     return true;
 334 }
 335
 336 #if wxUSE_IMAGE
 337
 338 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 339 {
 340     UnRef();
 341
 342     wxCHECK_MSG( image.IsOk(), false, wxT("invalid image") );
 343
 344     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 345         return false;
 346
 347     if (depth == 32 || (depth == -1 && image.HasAlpha()))
 348         return CreateFromImageAsPixbuf(image);
 349
 350     // otherwise create pixmap, if alpha is present it will be converted to mask
 351     return CreateFromImageAsPixmap(image, depth);
 352 }
 353
 354 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 355 {
 356     const int w = image.GetWidth();
 357     const int h = image.GetHeight();
 358     if (depth == 1)
 359     {
 360         // create XBM format bitmap
 361
 362         // one bit per pixel, each row starts on a byte boundary
 363         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 364         wxByte* out = new wxByte[out_size];
 365         // set bits are black
 366         memset(out, 0xff, out_size);
 367         const wxByte* in = image.GetData();
 368         unsigned bit_index = 0;
 369         for (int y = 0; y < h; y++)
 370         {
 371             for (int x = 0; x < w; x++, in += 3, bit_index++)
 372                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 373                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 374             // move index to next byte boundary
 375             bit_index = (bit_index + 7) & ~7u;
 376         }
 377         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 378         delete[] out;
 379
 380         if (!M_BMPDATA)     // SetPixmap may have failed
 381             return false;
 382     }
 383     else
 384     {
 385         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 386         if (!M_BMPDATA)
 387             return false;
 388
 389         wxGtkObject<GdkGC> gc(gdk_gc_new(M_BMPDATA->m_pixmap));
 390         gdk_draw_rgb_image(
 391             M_BMPDATA->m_pixmap, gc,
 392             0, 0, w, h,
 393             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 394     }
 395
 396     const wxByte* alpha = image.GetAlpha();
 397     if (alpha != NULL || image.HasMask())
 398     {
 399         // create mask as XBM format bitmap
 400
 401         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 402         wxByte* out = new wxByte[out_size];
 403         memset(out, 0xff, out_size);
 404         unsigned bit_index = 0;
 405         if (alpha != NULL)
 406         {
 407             for (int y = 0; y < h; y++)
 408             {
 409                 for (int x = 0; x < w; x++, bit_index++)
 410                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 411                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 412                 bit_index = (bit_index + 7) & ~7u;
 413             }
 414         }
 415         else
 416         {
 417             const wxByte r_mask = image.GetMaskRed();
 418             const wxByte g_mask = image.GetMaskGreen();
 419             const wxByte b_mask = image.GetMaskBlue();
 420             const wxByte* in = image.GetData();
 421             for (int y = 0; y < h; y++)
 422             {
 423                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 424                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 425                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 426                 bit_index = (bit_index + 7) & ~7u;
 427             }
 428         }
 429         SetMask(new wxMask(gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h)));
 430         delete[] out;
 431     }
 432     return IsOk();
 433 }
 434
 435 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 436 {
 437     int width = image.GetWidth();
 438     int height = image.GetHeight();
 439
 440     Create(width, height, 32);
 441     GdkPixbuf* pixbuf = GetPixbuf();
 442     if (!pixbuf)
 443         return false;
 444
 445     // Copy the data:
 446     const unsigned char* in = image.GetData();
 447     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 448     unsigned char *alpha = image.GetAlpha();
 449
 450     int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 451
 452     for (int y = 0; y < height; y++, out += rowpad)
 453     {
 454         for (int x = 0; x < width; x++, out += 4, in += 3)
 455         {
 456             out[0] = in[0];
 457             out[1] = in[1];
 458             out[2] = in[2];
 459             if (alpha)
 460                 out[3] = *alpha++;
 461         }
 462     }
 463
 464     return true;
 465 }
 466
 467 wxImage wxBitmap::ConvertToImage() const
 468 {
 469     wxCHECK_MSG( IsOk(), wxNullImage, wxT("invalid bitmap") );
 470
 471     const int w = GetWidth();
 472     const int h = GetHeight();
 473     wxImage image(w, h, false);
 474     unsigned char *data = image.GetData();
 475
 476     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 477
 478     // prefer pixbuf if available, it will preserve alpha and should be quicker
 479     if (HasPixbuf())
 480     {
 481         GdkPixbuf *pixbuf = GetPixbuf();
 482         unsigned char* alpha = NULL;
 483         if (gdk_pixbuf_get_has_alpha(pixbuf))
 484         {
 485             image.SetAlpha();
 486             alpha = image.GetAlpha();
 487         }
 488         const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
 489         unsigned char *out = data;
 490         const int inc = 3 + int(alpha != NULL);
 491         const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 492
 493         for (int y = 0; y < h; y++, in += rowpad)
 494         {
 495             for (int x = 0; x < w; x++, in += inc, out += 3)
 496             {
 497                 out[0] = in[0];
 498                 out[1] = in[1];
 499                 out[2] = in[2];
 500                 if (alpha != NULL)
 501                     *alpha++ = in[3];
 502             }
 503         }
 504     }
 505     else
 506     {
 507         GdkPixmap* pixmap = GetPixmap();
 508         GdkPixmap* pixmap_invert = NULL;
 509         if (GetDepth() == 1)
 510         {
 511             // mono bitmaps are inverted, i.e. 0 is white
 512             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 513             wxGtkObject<GdkGC> gc(gdk_gc_new(pixmap_invert));
 514             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 515             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 516             pixmap = pixmap_invert;
 517         }
 518         // create a pixbuf which shares data with the wxImage
 519         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 520             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 521
 522         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 523
 524         g_object_unref(pixbuf);
 525         if (pixmap_invert != NULL)
 526             g_object_unref(pixmap_invert);
 527     }
 528     // convert mask, unless there is already alpha
 529     if (GetMask() && !image.HasAlpha())
 530     {
 531         // we hard code the mask colour for now but we could also make an
 532         // effort (and waste time) to choose a colour not present in the
 533         // image already to avoid having to fudge the pixels below --
 534         // whether it's worth to do it is unclear however
 535         const int MASK_RED = 1;
 536         const int MASK_GREEN = 2;
 537         const int MASK_BLUE = 3;
 538         const int MASK_BLUE_REPLACEMENT = 2;
 539
 540         image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 541         GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 542
 543         for (int y = 0; y < h; y++)
 544         {
 545             for (int x = 0; x < w; x++, data += 3)
 546             {
 547                 if (gdk_image_get_pixel(image_mask, x, y) == 0)
 548                 {
 549                     data[0] = MASK_RED;
 550                     data[1] = MASK_GREEN;
 551                     data[2] = MASK_BLUE;
 552                 }
 553                 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 554                 {
 555                     // we have to fudge the colour a bit to prevent
 556                     // this pixel from appearing transparent
 557                     data[2] = MASK_BLUE_REPLACEMENT;
 558                 }
 559             }
 560         }
 561         g_object_unref(image_mask);
 562     }
 563
 564     return image;
 565 }
 566
 567 #endif // wxUSE_IMAGE
 568
 569 int wxBitmap::GetHeight() const
 570 {
 571     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 572
 573     return M_BMPDATA->m_height;
 574 }
 575
 576 int wxBitmap::GetWidth() const
 577 {
 578     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 579
 580     return M_BMPDATA->m_width;
 581 }
 582
 583 int wxBitmap::GetDepth() const
 584 {
 585     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 586
 587     return M_BMPDATA->m_bpp;
 588 }
 589
 590 wxMask *wxBitmap::GetMask() const
 591 {
 592     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 593
 594     return M_BMPDATA->m_mask;
 595 }
 596
 597 void wxBitmap::SetMask( wxMask *mask )
 598 {
 599     wxCHECK_RET( IsOk(), wxT("invalid bitmap") );
 600
 601     AllocExclusive();
 602     delete M_BMPDATA->m_mask;
 603     M_BMPDATA->m_mask = mask;
 604 }
 605
 606 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 607 {
 608     *this = icon;
 609     return IsOk();
 610 }
 611
 612 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 613 {
 614     wxBitmap ret;
 615
 616     wxCHECK_MSG(IsOk(), ret, wxT("invalid bitmap"));
 617
 618     const int w = rect.width;
 619     const int h = rect.height;
 620     const wxBitmapRefData* bmpData = M_BMPDATA;
 621
 622     wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
 623                 rect.x + w <= bmpData->m_width &&
 624                 rect.y + h <= bmpData->m_height,
 625                 ret, wxT("invalid bitmap region"));
 626
 627     wxBitmapRefData * const newRef = new wxBitmapRefData(w, h, bmpData->m_bpp);
 628     ret.m_refData = newRef;
 629
 630     if (bmpData->m_pixbuf)
 631     {
 632         GdkPixbuf* pixbuf =
 633             gdk_pixbuf_new_subpixbuf(bmpData->m_pixbuf, rect.x, rect.y, w, h);
 634         newRef->m_pixbuf = gdk_pixbuf_copy(pixbuf);
 635         g_object_unref(pixbuf);
 636     }
 637     if (bmpData->m_pixmap)
 638     {
 639         newRef->m_pixmap = gdk_pixmap_new(bmpData->m_pixmap, w, h, -1);
 640         GdkGC* gc = gdk_gc_new(newRef->m_pixmap);
 641         gdk_draw_drawable(
 642             newRef->m_pixmap, gc, bmpData->m_pixmap, rect.x, rect.y, 0, 0, w, h);
 643         g_object_unref(gc);
 644     }
 645     GdkPixmap* mask = NULL;
 646     if (bmpData->m_mask)
 647         mask = bmpData->m_mask->GetBitmap();
 648     if (mask)
 649     {
 650         GdkPixmap* sub_mask = gdk_pixmap_new(mask, w, h, 1);
 651         newRef->m_mask = new wxMask(sub_mask);
 652         GdkGC* gc = gdk_gc_new(sub_mask);
 653         gdk_draw_drawable(
 654             sub_mask, gc, mask, rect.x, rect.y, 0, 0, w, h);
 655         g_object_unref(gc);
 656     }
 657
 658     return ret;
 659 }
 660
 661 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 662 {
 663     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 664
 665 #if wxUSE_IMAGE
 666     wxImage image = ConvertToImage();
 667     if (image.IsOk() && image.SaveFile(name, type))
 668         return true;
 669 #endif
 670     const char* type_name = NULL;
 671     switch (type)
 672     {
 673         case wxBITMAP_TYPE_BMP:  type_name = "bmp";  break;
 674         case wxBITMAP_TYPE_ICO:  type_name = "ico";  break;
 675         case wxBITMAP_TYPE_JPEG: type_name = "jpeg"; break;
 676         case wxBITMAP_TYPE_PNG:  type_name = "png";  break;
 677         default: break;
 678     }
 679     return type_name &&
 680         gdk_pixbuf_save(GetPixbuf(), name.fn_str(), type_name, NULL, NULL);
 681 }
 682
 683 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 684 {
 685 #if wxUSE_IMAGE
 686     wxImage image;
 687     if (image.LoadFile(name, type) && image.IsOk())
 688         *this = wxBitmap(image);
 689     else
 690 #endif
 691     {
 692         wxUnusedVar(type); // The type is detected automatically by GDK.
 693
 694         *this = wxBitmap(gdk_pixbuf_new_from_file(name.fn_str(), NULL));
 695     }
 696
 697     return IsOk();
 698 }
 699
 700 #if wxUSE_PALETTE
 701 wxPalette *wxBitmap::GetPalette() const
 702 {
 703     return NULL;
 704 }
 705
 706 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 707 {
 708     // TODO
 709 }
 710 #endif // wxUSE_PALETTE
 711
 712 void wxBitmap::SetHeight( int height )
 713 {
 714     AllocExclusive();
 715     M_BMPDATA->m_height = height;
 716 }
 717
 718 void wxBitmap::SetWidth( int width )
 719 {
 720     AllocExclusive();
 721     M_BMPDATA->m_width = width;
 722 }
 723
 724 void wxBitmap::SetDepth( int depth )
 725 {
 726     AllocExclusive();
 727     M_BMPDATA->m_bpp = depth;
 728 }
 729
 730 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 731 {
 732     UnRef();
 733
 734     if (!pixmap)
 735         return;
 736
 737     int w, h;
 738     gdk_drawable_get_size(pixmap, &w, &h);
 739     wxBitmapRefData* bmpData = new wxBitmapRefData(w, h, 0);
 740     m_refData = bmpData;
 741     bmpData->m_pixmap = pixmap;
 742     bmpData->m_bpp = gdk_drawable_get_depth(pixmap);
 743 }
 744
 745 GdkPixmap *wxBitmap::GetPixmap() const
 746 {
 747     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 748
 749     wxBitmapRefData* bmpData = M_BMPDATA;
 750     if (bmpData->m_pixmap)
 751         return bmpData->m_pixmap;
 752
 753     if (bmpData->m_pixbuf)
 754     {
 755         GdkPixmap* pixmap = NULL;
 756         GdkPixmap** mask_pixmap = NULL;
 757         if (gdk_pixbuf_get_has_alpha(bmpData->m_pixbuf))
 758         {
 759             // make new mask from alpha
 760             mask_pixmap = &pixmap;
 761         }
 762         gdk_pixbuf_render_pixmap_and_mask(
 763             bmpData->m_pixbuf, &bmpData->m_pixmap, mask_pixmap, 128);
 764         if (pixmap)
 765         {
 766             delete bmpData->m_mask;
 767             bmpData->m_mask = new wxMask(pixmap);
 768         }
 769     }
 770     else
 771     {
 772         bmpData->m_pixmap = gdk_pixmap_new(wxGetRootWindow()->window,
 773             bmpData->m_width, bmpData->m_height, bmpData->m_bpp == 1 ? 1 : -1);
 774     }
 775     return bmpData->m_pixmap;
 776 }
 777
 778 bool wxBitmap::HasPixmap() const
 779 {
 780     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 781
 782     return M_BMPDATA->m_pixmap != NULL;
 783 }
 784
 785 GdkPixbuf *wxBitmap::GetPixbuf() const
 786 {
 787     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 788
 789     wxBitmapRefData* bmpData = M_BMPDATA;
 790     if (bmpData->m_pixbuf)
 791         return bmpData->m_pixbuf;
 792
 793     const int w = bmpData->m_width;
 794     const int h = bmpData->m_height;
 795     GdkPixmap* mask = NULL;
 796     if (bmpData->m_mask)
 797         mask = bmpData->m_mask->GetBitmap();
 798     const bool useAlpha = bmpData->m_alphaRequested || mask;
 799     bmpData->m_pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, useAlpha, 8, w, h);
 800     if (bmpData->m_pixmap)
 801         PixmapToPixbuf(bmpData->m_pixmap, bmpData->m_pixbuf, w, h);
 802     if (mask)
 803         MaskToAlpha(mask, bmpData->m_pixbuf, w, h);
 804     return bmpData->m_pixbuf;
 805 }
 806
 807 bool wxBitmap::HasPixbuf() const
 808 {
 809     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 810
 811     return M_BMPDATA->m_pixbuf != NULL;
 812 }
 813
 814 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 815 {
 816     if (keep == Pixmap && HasPixbuf())
 817     {
 818         g_object_unref (M_BMPDATA->m_pixbuf);
 819         M_BMPDATA->m_pixbuf = NULL;
 820     }
 821     if (keep == Pixbuf && HasPixmap())
 822     {
 823         g_object_unref (M_BMPDATA->m_pixmap);
 824         M_BMPDATA->m_pixmap = NULL;
 825     }
 826 }
 827
 828 #ifdef wxHAS_RAW_BITMAP
 829 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 830 {
 831     void* bits = NULL;
 832     GdkPixbuf *pixbuf = GetPixbuf();
 833     const bool hasAlpha = HasAlpha();
 834
 835     // allow access if bpp is valid and matches existence of alpha
 836     if ( pixbuf && ((bpp == 24 && !hasAlpha) || (bpp == 32 && hasAlpha)) )
 837     {
 838         data.m_height = gdk_pixbuf_get_height( pixbuf );
 839         data.m_width = gdk_pixbuf_get_width( pixbuf );
 840         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
 841         bits = gdk_pixbuf_get_pixels(pixbuf);
 842     }
 843     return bits;
 844 }
 845
 846 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 847 {
 848 }
 849 #endif // wxHAS_RAW_BITMAP
 850
 851 bool wxBitmap::HasAlpha() const
 852 {
 853     const wxBitmapRefData* bmpData = M_BMPDATA;
 854     return bmpData && (bmpData->m_alphaRequested ||
 855         (bmpData->m_pixbuf && gdk_pixbuf_get_has_alpha(bmpData->m_pixbuf)));
 856 }
 857
 858 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 859 {
 860     return new wxBitmapRefData(0, 0, 0);
 861 }
 862
 863 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 864 {
 865     const wxBitmapRefData* oldRef = static_cast<const wxBitmapRefData*>(data);
 866     wxBitmapRefData * const newRef = new wxBitmapRefData(oldRef->m_width,
 867                                                          oldRef->m_height,
 868                                                          oldRef->m_bpp);
 869     if (oldRef->m_pixmap != NULL)
 870     {
 871         newRef->m_pixmap = gdk_pixmap_new(
 872             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 873             // use pixmap depth, m_bpp may not match
 874             gdk_drawable_get_depth(oldRef->m_pixmap));
 875         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_pixmap));
 876         gdk_draw_drawable(
 877             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 878     }
 879     if (oldRef->m_pixbuf != NULL)
 880     {
 881         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 882     }
 883     if (oldRef->m_mask != NULL)
 884     {
 885         newRef->m_mask = new wxMask(*oldRef->m_mask);
 886     }
 887
 888     return newRef;
 889 }
 890
 891 /* static */ void wxBitmap::InitStandardHandlers()
 892 {
 893     // TODO: Insert handler based on GdkPixbufs handler later
 894 }