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/app.h"
  17     #include "wx/icon.h"
  18     #include "wx/math.h"
  19     #include "wx/image.h"
  20     #include "wx/colour.h"
  21 #endif
  22
  23 #include "wx/rawbmp.h"
  24
  25 #include "wx/gtk/private/object.h"
  26
  27 #include <gtk/gtk.h>
  28
  29 //-----------------------------------------------------------------------------
  30 // data
  31 //-----------------------------------------------------------------------------
  32
  33 extern GtkWidget *wxGetRootWindow();
  34
  35 //-----------------------------------------------------------------------------
  36 // wxMask
  37 //-----------------------------------------------------------------------------
  38
  39 IMPLEMENT_DYNAMIC_CLASS(wxMask, wxMaskBase)
  40
  41 wxMask::wxMask()
  42 {
  43     m_bitmap = NULL;
  44 }
  45
  46 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  47 {
  48     m_bitmap = NULL;
  49     InitFromColour(bitmap, colour);
  50 }
  51
  52 #if wxUSE_PALETTE
  53 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  54 {
  55     m_bitmap = NULL;
  56     Create( bitmap, paletteIndex );
  57 }
  58 #endif // wxUSE_PALETTE
  59
  60 wxMask::wxMask( const wxBitmap& bitmap )
  61 {
  62     m_bitmap = NULL;
  63     InitFromMonoBitmap(bitmap);
  64 }
  65
  66 wxMask::~wxMask()
  67 {
  68     if (m_bitmap)
  69         g_object_unref (m_bitmap);
  70 }
  71
  72 void wxMask::FreeData()
  73 {
  74     if (m_bitmap)
  75     {
  76         g_object_unref (m_bitmap);
  77         m_bitmap = NULL;
  78     }
  79 }
  80
  81 bool wxMask::InitFromColour(const wxBitmap& bitmap, const wxColour& colour)
  82 {
  83     const int w = bitmap.GetWidth();
  84     const int h = bitmap.GetHeight();
  85
  86     // create mask as XBM format bitmap
  87
  88     // one bit per pixel, each row starts on a byte boundary
  89     const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
  90     wxByte* out = new wxByte[out_size];
  91     // set bits are unmasked
  92     memset(out, 0xff, out_size);
  93     unsigned bit_index = 0;
  94     if (bitmap.HasPixbuf())
  95     {
  96         const wxByte r_mask = colour.Red();
  97         const wxByte g_mask = colour.Green();
  98         const wxByte b_mask = colour.Blue();
  99         GdkPixbuf* pixbuf = bitmap.GetPixbuf();
 100         const wxByte* in = gdk_pixbuf_get_pixels(pixbuf);
 101         const int inc = 3 + int(gdk_pixbuf_get_has_alpha(pixbuf) != 0);
 102         const int rowpadding = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 103         for (int y = 0; y < h; y++, in += rowpadding)
 104         {
 105             for (int x = 0; x < w; x++, in += inc, bit_index++)
 106                 if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 107                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 108             // move index to next byte boundary
 109             bit_index = (bit_index + 7) & ~7u;
 110         }
 111     }
 112     else
 113     {
 114         GdkImage* image = gdk_drawable_get_image(bitmap.GetPixmap(), 0, 0, w, h);
 115         GdkColormap* colormap = gdk_image_get_colormap(image);
 116         guint32 mask_pixel;
 117         if (colormap == NULL)
 118             // mono bitmap, white is pixel value 0
 119             mask_pixel = guint32(colour.Red() != 255 || colour.Green() != 255 || colour.Blue() != 255);
 120         else
 121         {
 122             wxColor c(colour);
 123             c.CalcPixel(colormap);
 124             mask_pixel = c.GetPixel();
 125         }
 126         for (int y = 0; y < h; y++)
 127         {
 128             for (int x = 0; x < w; x++, bit_index++)
 129                 if (gdk_image_get_pixel(image, x, y) == mask_pixel)
 130                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 131             bit_index = (bit_index + 7) & ~7u;
 132         }
 133         g_object_unref(image);
 134     }
 135     m_bitmap = gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h);
 136     delete[] out;
 137     return true;
 138 }
 139
 140 bool wxMask::InitFromMonoBitmap(const wxBitmap& bitmap)
 141 {
 142     if (!bitmap.IsOk()) return false;
 143
 144     wxCHECK_MSG( bitmap.GetDepth() == 1, false, wxT("Cannot create mask from colour bitmap") );
 145
 146     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 147
 148     if (!m_bitmap) return false;
 149
 150     wxGtkObject<GdkGC> gc(gdk_gc_new( m_bitmap ));
 151     gdk_gc_set_function(gc, GDK_COPY_INVERT);
 152     gdk_draw_drawable(m_bitmap, gc, bitmap.GetPixmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight());
 153
 154     return true;
 155 }
 156
 157 GdkBitmap *wxMask::GetBitmap() const
 158 {
 159     return m_bitmap;
 160 }
 161
 162 //-----------------------------------------------------------------------------
 163 // wxBitmapRefData
 164 //-----------------------------------------------------------------------------
 165
 166 class wxBitmapRefData: public wxGDIRefData
 167 {
 168 public:
 169     wxBitmapRefData();
 170     virtual ~wxBitmapRefData();
 171
 172     virtual bool IsOk() const { return m_pixmap || m_pixbuf; }
 173
 174     GdkPixmap      *m_pixmap;
 175     GdkPixbuf      *m_pixbuf;
 176     wxMask         *m_mask;
 177     int             m_width;
 178     int             m_height;
 179     int             m_bpp;
 180 };
 181
 182 wxBitmapRefData::wxBitmapRefData()
 183 {
 184     m_pixmap = NULL;
 185     m_pixbuf = NULL;
 186     m_mask = NULL;
 187     m_width = 0;
 188     m_height = 0;
 189     m_bpp = 0;
 190 }
 191
 192 wxBitmapRefData::~wxBitmapRefData()
 193 {
 194     if (m_pixmap)
 195         g_object_unref (m_pixmap);
 196     if (m_pixbuf)
 197         g_object_unref (m_pixbuf);
 198     delete m_mask;
 199 }
 200
 201
 202 //-----------------------------------------------------------------------------
 203 // wxBitmap
 204 //-----------------------------------------------------------------------------
 205
 206 #define M_BMPDATA static_cast<wxBitmapRefData*>(m_refData)
 207
 208 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 209
 210 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 211 {
 212     LoadFile(filename, type);
 213 }
 214
 215 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 216 {
 217     wxASSERT(depth == 1);
 218     if (width > 0 && height > 0 && depth == 1)
 219     {
 220         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 221     }
 222 }
 223
 224 wxBitmap::wxBitmap(const char* const* bits)
 225 {
 226     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 227
 228     GdkBitmap* mask = NULL;
 229     SetPixmap(gdk_pixmap_create_from_xpm_d(wxGetRootWindow()->window, &mask, NULL, const_cast<char**>(bits)));
 230     if (!M_BMPDATA)
 231         return;
 232
 233     if (M_BMPDATA->m_pixmap != NULL && mask != NULL)
 234     {
 235         M_BMPDATA->m_mask = new wxMask;
 236         M_BMPDATA->m_mask->m_bitmap = mask;
 237     }
 238 }
 239
 240 wxBitmap::~wxBitmap()
 241 {
 242 }
 243
 244 bool wxBitmap::Create( int width, int height, int depth )
 245 {
 246     UnRef();
 247
 248     if ( width <= 0 || height <= 0 )
 249     {
 250         return false;
 251     }
 252
 253     const GdkVisual* visual = wxTheApp->GetGdkVisual();
 254
 255     if (depth == 32)
 256     {
 257         SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8, width, height), 32);
 258
 259         if (!M_BMPDATA)
 260             return false;
 261
 262         // must initialize alpha, otherwise GetPixmap()
 263         // will create a mask out of garbage
 264         gdk_pixbuf_fill(M_BMPDATA->m_pixbuf, 0x000000ff);
 265     }
 266     else if (depth == 24)
 267     {
 268         if (visual->depth == depth)
 269             SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 270         else
 271             SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8, width, height), 24);
 272     }
 273     else
 274     {
 275         if (depth != 1)
 276         {
 277             if (depth == -1)
 278                 depth = visual->depth;
 279         }
 280         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 281     }
 282
 283     return IsOk();
 284 }
 285
 286 #if wxUSE_IMAGE
 287
 288 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 289 {
 290     UnRef();
 291
 292     wxCHECK_MSG( image.IsOk(), false, wxT("invalid image") );
 293     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 294
 295     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 296         return false;
 297
 298     // create pixbuf if image has alpha and requested depth is compatible
 299     if (image.HasAlpha() && (depth == -1 || depth == 32))
 300         return CreateFromImageAsPixbuf(image);
 301
 302     // otherwise create pixmap, if alpha is present it will be converted to mask
 303     return CreateFromImageAsPixmap(image, depth);
 304 }
 305
 306 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 307 {
 308     const int w = image.GetWidth();
 309     const int h = image.GetHeight();
 310     if (depth == 1)
 311     {
 312         // create XBM format bitmap
 313
 314         // one bit per pixel, each row starts on a byte boundary
 315         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 316         wxByte* out = new wxByte[out_size];
 317         // set bits are black
 318         memset(out, 0xff, out_size);
 319         const wxByte* in = image.GetData();
 320         unsigned bit_index = 0;
 321         for (int y = 0; y < h; y++)
 322         {
 323             for (int x = 0; x < w; x++, in += 3, bit_index++)
 324                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 325                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 326             // move index to next byte boundary
 327             bit_index = (bit_index + 7) & ~7u;
 328         }
 329         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 330         delete[] out;
 331
 332         if (!M_BMPDATA)     // SetPixmap may have failed
 333             return false;
 334     }
 335     else
 336     {
 337         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 338         if (!M_BMPDATA)
 339             return false;
 340
 341         wxGtkObject<GdkGC> gc(gdk_gc_new(M_BMPDATA->m_pixmap));
 342         gdk_draw_rgb_image(
 343             M_BMPDATA->m_pixmap, gc,
 344             0, 0, w, h,
 345             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 346     }
 347
 348     const wxByte* alpha = image.GetAlpha();
 349     if (alpha != NULL || image.HasMask())
 350     {
 351         // create mask as XBM format bitmap
 352
 353         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 354         wxByte* out = new wxByte[out_size];
 355         memset(out, 0xff, out_size);
 356         unsigned bit_index = 0;
 357         if (alpha != NULL)
 358         {
 359             for (int y = 0; y < h; y++)
 360             {
 361                 for (int x = 0; x < w; x++, bit_index++)
 362                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 363                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 364                 bit_index = (bit_index + 7) & ~7u;
 365             }
 366         }
 367         else
 368         {
 369             const wxByte r_mask = image.GetMaskRed();
 370             const wxByte g_mask = image.GetMaskGreen();
 371             const wxByte b_mask = image.GetMaskBlue();
 372             const wxByte* in = image.GetData();
 373             for (int y = 0; y < h; y++)
 374             {
 375                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 376                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 377                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 378                 bit_index = (bit_index + 7) & ~7u;
 379             }
 380         }
 381         wxMask* mask = new wxMask;
 382         mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
 383         SetMask(mask);
 384         delete[] out;
 385     }
 386     return IsOk();
 387 }
 388
 389 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 390 {
 391     wxASSERT(image.HasAlpha());
 392
 393     int width = image.GetWidth();
 394     int height = image.GetHeight();
 395
 396     Create(width, height, 32);
 397     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 398     if (!pixbuf)
 399         return false;
 400
 401     // Copy the data:
 402     const unsigned char* in = image.GetData();
 403     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 404     unsigned char *alpha = image.GetAlpha();
 405
 406     int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 407
 408     for (int y = 0; y < height; y++, out += rowpad)
 409     {
 410         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 411         {
 412             out[0] = in[0];
 413             out[1] = in[1];
 414             out[2] = in[2];
 415             out[3] = *alpha;
 416         }
 417     }
 418
 419     return true;
 420 }
 421
 422 wxImage wxBitmap::ConvertToImage() const
 423 {
 424     wxCHECK_MSG( IsOk(), wxNullImage, wxT("invalid bitmap") );
 425
 426     const int w = GetWidth();
 427     const int h = GetHeight();
 428     wxImage image(w, h, false);
 429     unsigned char *data = image.GetData();
 430
 431     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 432
 433     // prefer pixbuf if available, it will preserve alpha and should be quicker
 434     if (HasPixbuf())
 435     {
 436         GdkPixbuf *pixbuf = GetPixbuf();
 437         unsigned char* alpha = NULL;
 438         if (gdk_pixbuf_get_has_alpha(pixbuf))
 439         {
 440             image.SetAlpha();
 441             alpha = image.GetAlpha();
 442         }
 443         const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
 444         unsigned char *out = data;
 445         const int inc = 3 + int(alpha != NULL);
 446         const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 447
 448         for (int y = 0; y < h; y++, in += rowpad)
 449         {
 450             for (int x = 0; x < w; x++, in += inc, out += 3)
 451             {
 452                 out[0] = in[0];
 453                 out[1] = in[1];
 454                 out[2] = in[2];
 455                 if (alpha != NULL)
 456                     *alpha++ = in[3];
 457             }
 458         }
 459     }
 460     else
 461     {
 462         GdkPixmap* pixmap = GetPixmap();
 463         GdkPixmap* pixmap_invert = NULL;
 464         if (GetDepth() == 1)
 465         {
 466             // mono bitmaps are inverted, i.e. 0 is white
 467             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 468             wxGtkObject<GdkGC> gc(gdk_gc_new(pixmap_invert));
 469             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 470             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 471             pixmap = pixmap_invert;
 472         }
 473         // create a pixbuf which shares data with the wxImage
 474         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 475             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 476
 477         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 478
 479         g_object_unref(pixbuf);
 480         if (pixmap_invert != NULL)
 481             g_object_unref(pixmap_invert);
 482     }
 483     // convert mask, unless there is already alpha
 484     if (GetMask() && !image.HasAlpha())
 485     {
 486         // we hard code the mask colour for now but we could also make an
 487         // effort (and waste time) to choose a colour not present in the
 488         // image already to avoid having to fudge the pixels below --
 489         // whether it's worth to do it is unclear however
 490         const int MASK_RED = 1;
 491         const int MASK_GREEN = 2;
 492         const int MASK_BLUE = 3;
 493         const int MASK_BLUE_REPLACEMENT = 2;
 494
 495         image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 496         GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 497
 498         for (int y = 0; y < h; y++)
 499         {
 500             for (int x = 0; x < w; x++, data += 3)
 501             {
 502                 if (gdk_image_get_pixel(image_mask, x, y) == 0)
 503                 {
 504                     data[0] = MASK_RED;
 505                     data[1] = MASK_GREEN;
 506                     data[2] = MASK_BLUE;
 507                 }
 508                 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 509                 {
 510                     // we have to fudge the colour a bit to prevent
 511                     // this pixel from appearing transparent
 512                     data[2] = MASK_BLUE_REPLACEMENT;
 513                 }
 514             }
 515         }
 516         g_object_unref(image_mask);
 517     }
 518
 519     return image;
 520 }
 521
 522 #endif // wxUSE_IMAGE
 523
 524 int wxBitmap::GetHeight() const
 525 {
 526     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 527
 528     return M_BMPDATA->m_height;
 529 }
 530
 531 int wxBitmap::GetWidth() const
 532 {
 533     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 534
 535     return M_BMPDATA->m_width;
 536 }
 537
 538 int wxBitmap::GetDepth() const
 539 {
 540     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 541
 542     return M_BMPDATA->m_bpp;
 543 }
 544
 545 wxMask *wxBitmap::GetMask() const
 546 {
 547     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 548
 549     return M_BMPDATA->m_mask;
 550 }
 551
 552 void wxBitmap::SetMask( wxMask *mask )
 553 {
 554     wxCHECK_RET( IsOk(), wxT("invalid bitmap") );
 555
 556     AllocExclusive();
 557     delete M_BMPDATA->m_mask;
 558     M_BMPDATA->m_mask = mask;
 559 }
 560
 561 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 562 {
 563     *this = icon;
 564     return IsOk();
 565 }
 566
 567 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 568 {
 569     wxBitmap ret;
 570
 571     wxCHECK_MSG(IsOk(), ret, wxT("invalid bitmap"));
 572     wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
 573                 rect.x + rect.width <= M_BMPDATA->m_width &&
 574                 rect.y + rect.height <= M_BMPDATA->m_height,
 575                 ret, wxT("invalid bitmap region"));
 576
 577     if (HasPixbuf() || M_BMPDATA->m_bpp == 32)
 578     {
 579         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 580                                            gdk_pixbuf_get_has_alpha(GetPixbuf()),
 581                                            8, rect.width, rect.height);
 582         if (!pixbuf)
 583             return ret;
 584
 585         ret.SetPixbuf(pixbuf, M_BMPDATA->m_bpp);
 586         gdk_pixbuf_copy_area(GetPixbuf(),
 587                              rect.x, rect.y, rect.width, rect.height,
 588                              pixbuf, 0, 0);
 589     }
 590     else
 591     {
 592         ret.Create(rect.width, rect.height, M_BMPDATA->m_bpp);
 593         wxGtkObject<GdkGC> gc(gdk_gc_new( ret.GetPixmap() ));
 594         gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 595     }
 596     // make mask, unless there is already alpha
 597     if (GetMask() && !HasAlpha())
 598     {
 599         wxMask *mask = new wxMask;
 600         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 601
 602         wxGtkObject<GdkGC> gc(gdk_gc_new( mask->m_bitmap ));
 603         gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
 604
 605         ret.SetMask( mask );
 606     }
 607
 608     return ret;
 609 }
 610
 611 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 612 {
 613     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 614
 615 #if wxUSE_IMAGE
 616     // Try to save the bitmap via wxImage handlers:
 617     wxImage image = ConvertToImage();
 618     return image.Ok() && image.SaveFile(name, type);
 619 #else // !wxUSE_IMAGE
 620     wxUnusedVar(name);
 621     wxUnusedVar(type);
 622
 623     return false;
 624 #endif // wxUSE_IMAGE
 625 }
 626
 627 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 628 {
 629     UnRef();
 630
 631     if (type == wxBITMAP_TYPE_XPM)
 632     {
 633         GdkBitmap *mask = NULL;
 634         SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
 635         if (!M_BMPDATA)
 636             return false;   // do not set the mask
 637
 638         if (mask)
 639         {
 640             M_BMPDATA->m_mask = new wxMask;
 641             M_BMPDATA->m_mask->m_bitmap = mask;
 642         }
 643     }
 644 #if wxUSE_IMAGE
 645     else // try if wxImage can load it
 646     {
 647         wxImage image;
 648         if (image.LoadFile(name, type) && image.Ok())
 649             CreateFromImage(image, -1);
 650     }
 651 #endif // wxUSE_IMAGE
 652
 653     return IsOk();
 654 }
 655
 656 #if wxUSE_PALETTE
 657 wxPalette *wxBitmap::GetPalette() const
 658 {
 659     return NULL;
 660 }
 661
 662 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 663 {
 664     // TODO
 665 }
 666 #endif // wxUSE_PALETTE
 667
 668 void wxBitmap::SetHeight( int height )
 669 {
 670     AllocExclusive();
 671     M_BMPDATA->m_height = height;
 672 }
 673
 674 void wxBitmap::SetWidth( int width )
 675 {
 676     AllocExclusive();
 677     M_BMPDATA->m_width = width;
 678 }
 679
 680 void wxBitmap::SetDepth( int depth )
 681 {
 682     AllocExclusive();
 683     M_BMPDATA->m_bpp = depth;
 684 }
 685
 686 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 687 {
 688     if (!pixmap)
 689         return;
 690
 691     if (!m_refData)
 692         m_refData = new wxBitmapRefData;
 693
 694     // AllocExclusive should not be needed for this internal function
 695     wxASSERT(m_refData->GetRefCount() == 1);
 696     wxASSERT(M_BMPDATA->m_pixmap == NULL);
 697     M_BMPDATA->m_pixmap = pixmap;
 698     gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
 699     M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
 700     PurgeOtherRepresentations(Pixmap);
 701 }
 702
 703 GdkPixmap *wxBitmap::GetPixmap() const
 704 {
 705     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 706
 707     // create the pixmap on the fly if we use Pixbuf representation:
 708     if (M_BMPDATA->m_pixmap == NULL)
 709     {
 710         GdkPixmap** pmask = NULL;
 711         if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
 712         {
 713             // make new mask from alpha
 714             delete M_BMPDATA->m_mask;
 715             M_BMPDATA->m_mask = new wxMask;
 716             pmask = &M_BMPDATA->m_mask->m_bitmap;
 717         }
 718         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
 719                                           &M_BMPDATA->m_pixmap,
 720                                           pmask,
 721                                           0x80 /* alpha threshold */);
 722     }
 723
 724     return M_BMPDATA->m_pixmap;
 725 }
 726
 727 bool wxBitmap::HasPixmap() const
 728 {
 729     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 730
 731     return M_BMPDATA->m_pixmap != NULL;
 732 }
 733
 734 GdkPixbuf *wxBitmap::GetPixbuf() const
 735 {
 736     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 737
 738     if (M_BMPDATA->m_pixbuf == NULL)
 739     {
 740
 741         int width = GetWidth();
 742         int height = GetHeight();
 743
 744         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 745                                            GetMask() != NULL,
 746                                            8, width, height);
 747         M_BMPDATA->m_pixbuf = pixbuf;
 748         gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
 749                                      0, 0, 0, 0, width, height);
 750         // apply the mask to created pixbuf:
 751         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
 752         {
 753             GdkPixbuf *pmask =
 754                 gdk_pixbuf_get_from_drawable(NULL,
 755                                              M_BMPDATA->m_mask->GetBitmap(),
 756                                              NULL,
 757                                              0, 0, 0, 0, width, height);
 758             if (pmask)
 759             {
 760                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
 761                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
 762                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 763                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
 764
 765                 for (int y = 0; y < height;
 766                      y++, bmp += bmprowinc, mask += maskrowinc)
 767                 {
 768                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
 769                     {
 770                         if (mask[0] == 0 /*black pixel*/)
 771                             bmp[3] = 0;
 772                     }
 773                 }
 774
 775                 g_object_unref (pmask);
 776             }
 777         }
 778     }
 779
 780     return M_BMPDATA->m_pixbuf;
 781 }
 782
 783 bool wxBitmap::HasPixbuf() const
 784 {
 785     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 786
 787     return M_BMPDATA->m_pixbuf != NULL;
 788 }
 789
 790 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf, int depth)
 791 {
 792     if (!pixbuf)
 793         return;
 794
 795     if (!m_refData)
 796         m_refData = new wxBitmapRefData;
 797
 798     // AllocExclusive should not be needed for this internal function
 799     wxASSERT(m_refData->GetRefCount() == 1);
 800     wxASSERT(M_BMPDATA->m_pixbuf == NULL);
 801     M_BMPDATA->m_pixbuf = pixbuf;
 802     M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
 803     M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
 804     // if depth specified
 805     if (depth != 0)
 806         M_BMPDATA->m_bpp = depth;
 807     else if (M_BMPDATA->m_bpp == 0)
 808         // use something reasonable
 809         M_BMPDATA->m_bpp = wxTheApp->GetGdkVisual()->depth;
 810     PurgeOtherRepresentations(Pixbuf);
 811 }
 812
 813 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 814 {
 815     if (keep == Pixmap && HasPixbuf())
 816     {
 817         g_object_unref (M_BMPDATA->m_pixbuf);
 818         M_BMPDATA->m_pixbuf = NULL;
 819     }
 820     if (keep == Pixbuf && HasPixmap())
 821     {
 822         g_object_unref (M_BMPDATA->m_pixmap);
 823         M_BMPDATA->m_pixmap = NULL;
 824     }
 825 }
 826
 827 #ifdef wxHAS_RAW_BITMAP
 828 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 829 {
 830     void* bits = NULL;
 831     GdkPixbuf *pixbuf = GetPixbuf();
 832     const bool hasAlpha = HasAlpha();
 833
 834     // allow access if bpp is valid and matches existence of alpha
 835     if ( pixbuf && ((bpp == 24 && !hasAlpha) || (bpp == 32 && hasAlpha)) )
 836     {
 837         data.m_height = gdk_pixbuf_get_height( pixbuf );
 838         data.m_width = gdk_pixbuf_get_width( pixbuf );
 839         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
 840         bits = gdk_pixbuf_get_pixels(pixbuf);
 841     }
 842     return bits;
 843 }
 844
 845 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 846 {
 847 }
 848 #endif // wxHAS_RAW_BITMAP
 849
 850 bool wxBitmap::HasAlpha() const
 851 {
 852     return m_refData != NULL && M_BMPDATA->m_pixbuf != NULL &&
 853         gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf);
 854 }
 855
 856 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 857 {
 858     return new wxBitmapRefData;
 859 }
 860
 861 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 862 {
 863     const wxBitmapRefData* oldRef = static_cast<const wxBitmapRefData*>(data);
 864     wxBitmapRefData* newRef = new wxBitmapRefData;
 865     newRef->m_width = oldRef->m_width;
 866     newRef->m_height = oldRef->m_height;
 867     newRef->m_bpp = oldRef->m_bpp;
 868     if (oldRef->m_pixmap != NULL)
 869     {
 870         newRef->m_pixmap = gdk_pixmap_new(
 871             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 872             // use pixmap depth, m_bpp may not match
 873             gdk_drawable_get_depth(oldRef->m_pixmap));
 874         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_pixmap));
 875         gdk_draw_drawable(
 876             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 877     }
 878     if (oldRef->m_pixbuf != NULL)
 879     {
 880         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 881     }
 882     if (oldRef->m_mask != NULL)
 883     {
 884         newRef->m_mask = new wxMask;
 885         newRef->m_mask->m_bitmap = gdk_pixmap_new(
 886             oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
 887         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_mask->m_bitmap));
 888         gdk_draw_drawable(newRef->m_mask->m_bitmap,
 889             gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
 890     }
 891
 892     return newRef;
 893 }
 894
 895 /* static */ void wxBitmap::InitStandardHandlers()
 896 {
 897     // TODO: Insert handler based on GdkPixbufs handler later
 898 }