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/palette.h"
  18     #include "wx/icon.h"
  19     #include "wx/math.h"
  20     #include "wx/image.h"
  21     #include "wx/colour.h"
  22 #endif
  23
  24 #include "wx/rawbmp.h"
  25
  26 #include "wx/gtk/private/object.h"
  27
  28 #include <gtk/gtk.h>
  29
  30 //-----------------------------------------------------------------------------
  31 // data
  32 //-----------------------------------------------------------------------------
  33
  34 extern GtkWidget *wxGetRootWindow();
  35
  36 //-----------------------------------------------------------------------------
  37 // wxMask
  38 //-----------------------------------------------------------------------------
  39
  40 IMPLEMENT_DYNAMIC_CLASS(wxMask, wxMaskBase)
  41
  42 wxMask::wxMask()
  43 {
  44     m_bitmap = NULL;
  45 }
  46
  47 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  48 {
  49     m_bitmap = NULL;
  50     InitFromColour(bitmap, colour);
  51 }
  52
  53 #if wxUSE_PALETTE
  54 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  55 {
  56     m_bitmap = NULL;
  57     Create( bitmap, paletteIndex );
  58 }
  59 #endif // wxUSE_PALETTE
  60
  61 wxMask::wxMask( const wxBitmap& bitmap )
  62 {
  63     m_bitmap = NULL;
  64     InitFromMonoBitmap(bitmap);
  65 }
  66
  67 wxMask::~wxMask()
  68 {
  69     if (m_bitmap)
  70         g_object_unref (m_bitmap);
  71 }
  72
  73 void wxMask::FreeData()
  74 {
  75     if (m_bitmap)
  76     {
  77         g_object_unref (m_bitmap);
  78         m_bitmap = NULL;
  79     }
  80 }
  81
  82 bool wxMask::InitFromColour(const wxBitmap& bitmap, const wxColour& colour)
  83 {
  84     const int w = bitmap.GetWidth();
  85     const int h = bitmap.GetHeight();
  86
  87     // create mask as XBM format bitmap
  88
  89     // one bit per pixel, each row starts on a byte boundary
  90     const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
  91     wxByte* out = new wxByte[out_size];
  92     // set bits are unmasked
  93     memset(out, 0xff, out_size);
  94     unsigned bit_index = 0;
  95     if (bitmap.HasPixbuf())
  96     {
  97         const wxByte r_mask = colour.Red();
  98         const wxByte g_mask = colour.Green();
  99         const wxByte b_mask = colour.Blue();
 100         GdkPixbuf* pixbuf = bitmap.GetPixbuf();
 101         const wxByte* in = gdk_pixbuf_get_pixels(pixbuf);
 102         const int inc = 3 + int(gdk_pixbuf_get_has_alpha(pixbuf) != 0);
 103         const int rowpadding = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 104         for (int y = 0; y < h; y++, in += rowpadding)
 105         {
 106             for (int x = 0; x < w; x++, in += inc, bit_index++)
 107                 if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 108                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 109             // move index to next byte boundary
 110             bit_index = (bit_index + 7) & ~7u;
 111         }
 112     }
 113     else
 114     {
 115         GdkImage* image = gdk_drawable_get_image(bitmap.GetPixmap(), 0, 0, w, h);
 116         GdkColormap* colormap = gdk_image_get_colormap(image);
 117         guint32 mask_pixel;
 118         if (colormap == NULL)
 119             // mono bitmap, white is pixel value 0
 120             mask_pixel = guint32(colour.Red() != 255 || colour.Green() != 255 || colour.Blue() != 255);
 121         else
 122         {
 123             wxColor c(colour);
 124             c.CalcPixel(colormap);
 125             mask_pixel = c.GetPixel();
 126         }
 127         for (int y = 0; y < h; y++)
 128         {
 129             for (int x = 0; x < w; x++, bit_index++)
 130                 if (gdk_image_get_pixel(image, x, y) == mask_pixel)
 131                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 132             bit_index = (bit_index + 7) & ~7u;
 133         }
 134         g_object_unref(image);
 135     }
 136     m_bitmap = gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h);
 137     delete[] out;
 138     return true;
 139 }
 140
 141 bool wxMask::InitFromMonoBitmap(const wxBitmap& bitmap)
 142 {
 143     if (!bitmap.IsOk()) return false;
 144
 145     wxCHECK_MSG( bitmap.GetDepth() == 1, false, wxT("Cannot create mask from colour bitmap") );
 146
 147     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 148
 149     if (!m_bitmap) return false;
 150
 151     wxGtkObject<GdkGC> gc(gdk_gc_new( m_bitmap ));
 152     gdk_gc_set_function(gc, GDK_COPY_INVERT);
 153     gdk_draw_drawable(m_bitmap, gc, bitmap.GetPixmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight());
 154
 155     return true;
 156 }
 157
 158 GdkBitmap *wxMask::GetBitmap() const
 159 {
 160     return m_bitmap;
 161 }
 162
 163 //-----------------------------------------------------------------------------
 164 // wxBitmapRefData
 165 //-----------------------------------------------------------------------------
 166
 167 class wxBitmapRefData: public wxGDIRefData
 168 {
 169 public:
 170     wxBitmapRefData();
 171     virtual ~wxBitmapRefData();
 172
 173     virtual bool IsOk() const { return m_pixmap || m_pixbuf; }
 174
 175     GdkPixmap      *m_pixmap;
 176     GdkPixbuf      *m_pixbuf;
 177     wxMask         *m_mask;
 178     int             m_width;
 179     int             m_height;
 180     int             m_bpp;
 181 #if wxUSE_PALETTE
 182     wxPalette      *m_palette;
 183 #endif // wxUSE_PALETTE
 184 };
 185
 186 wxBitmapRefData::wxBitmapRefData()
 187 {
 188     m_pixmap = NULL;
 189     m_pixbuf = NULL;
 190     m_mask = NULL;
 191     m_width = 0;
 192     m_height = 0;
 193     m_bpp = 0;
 194 #if wxUSE_PALETTE
 195     m_palette = NULL;
 196 #endif // wxUSE_PALETTE
 197 }
 198
 199 wxBitmapRefData::~wxBitmapRefData()
 200 {
 201     if (m_pixmap)
 202         g_object_unref (m_pixmap);
 203     if (m_pixbuf)
 204         g_object_unref (m_pixbuf);
 205     delete m_mask;
 206 #if wxUSE_PALETTE
 207     delete m_palette;
 208 #endif // wxUSE_PALETTE
 209 }
 210
 211
 212 //-----------------------------------------------------------------------------
 213 // wxBitmap
 214 //-----------------------------------------------------------------------------
 215
 216 #define M_BMPDATA static_cast<wxBitmapRefData*>(m_refData)
 217
 218 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 219
 220 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 221 {
 222     LoadFile(filename, type);
 223 }
 224
 225 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 226 {
 227     wxASSERT(depth == 1);
 228     if (width > 0 && height > 0 && depth == 1)
 229     {
 230         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 231     }
 232 }
 233
 234 wxBitmap::wxBitmap(const char* const* bits)
 235 {
 236     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 237
 238     GdkBitmap* mask = NULL;
 239     SetPixmap(gdk_pixmap_create_from_xpm_d(wxGetRootWindow()->window, &mask, NULL, const_cast<char**>(bits)));
 240     if (!M_BMPDATA)
 241         return;
 242
 243     if (M_BMPDATA->m_pixmap != NULL && mask != NULL)
 244     {
 245         M_BMPDATA->m_mask = new wxMask;
 246         M_BMPDATA->m_mask->m_bitmap = mask;
 247     }
 248 }
 249
 250 wxBitmap::~wxBitmap()
 251 {
 252 }
 253
 254 bool wxBitmap::Create( int width, int height, int depth )
 255 {
 256     UnRef();
 257
 258     if ( width <= 0 || height <= 0 )
 259     {
 260         return false;
 261     }
 262
 263     const GdkVisual* visual = wxTheApp->GetGdkVisual();
 264
 265     if (depth == 32)
 266     {
 267         SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8, width, height), 32);
 268
 269         if (!M_BMPDATA)
 270             return false;
 271
 272         // must initialize alpha, otherwise GetPixmap()
 273         // will create a mask out of garbage
 274         gdk_pixbuf_fill(M_BMPDATA->m_pixbuf, 0x000000ff);
 275     }
 276     else if (depth == 24)
 277     {
 278         if (visual->depth == depth)
 279             SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 280         else
 281             SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8, width, height), 24);
 282     }
 283     else
 284     {
 285         if (depth != 1)
 286         {
 287             if (depth == -1)
 288                 depth = visual->depth;
 289         }
 290         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 291     }
 292
 293     return IsOk();
 294 }
 295
 296 #if wxUSE_IMAGE
 297
 298 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 299 {
 300     UnRef();
 301
 302     wxCHECK_MSG( image.IsOk(), false, wxT("invalid image") );
 303     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 304
 305     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 306         return false;
 307
 308     // create pixbuf if image has alpha and requested depth is compatible
 309     if (image.HasAlpha() && (depth == -1 || depth == 32))
 310         return CreateFromImageAsPixbuf(image);
 311
 312     // otherwise create pixmap, if alpha is present it will be converted to mask
 313     return CreateFromImageAsPixmap(image, depth);
 314 }
 315
 316 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 317 {
 318     const int w = image.GetWidth();
 319     const int h = image.GetHeight();
 320     if (depth == 1)
 321     {
 322         // create XBM format bitmap
 323
 324         // one bit per pixel, each row starts on a byte boundary
 325         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 326         wxByte* out = new wxByte[out_size];
 327         // set bits are black
 328         memset(out, 0xff, out_size);
 329         const wxByte* in = image.GetData();
 330         unsigned bit_index = 0;
 331         for (int y = 0; y < h; y++)
 332         {
 333             for (int x = 0; x < w; x++, in += 3, bit_index++)
 334                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 335                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 336             // move index to next byte boundary
 337             bit_index = (bit_index + 7) & ~7u;
 338         }
 339         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 340         delete[] out;
 341
 342         if (!M_BMPDATA)     // SetPixmap may have failed
 343             return false;
 344     }
 345     else
 346     {
 347         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 348         if (!M_BMPDATA)
 349             return false;
 350
 351         wxGtkObject<GdkGC> gc(gdk_gc_new(M_BMPDATA->m_pixmap));
 352         gdk_draw_rgb_image(
 353             M_BMPDATA->m_pixmap, gc,
 354             0, 0, w, h,
 355             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 356     }
 357
 358     const wxByte* alpha = image.GetAlpha();
 359     if (alpha != NULL || image.HasMask())
 360     {
 361         // create mask as XBM format bitmap
 362
 363         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 364         wxByte* out = new wxByte[out_size];
 365         memset(out, 0xff, out_size);
 366         unsigned bit_index = 0;
 367         if (alpha != NULL)
 368         {
 369             for (int y = 0; y < h; y++)
 370             {
 371                 for (int x = 0; x < w; x++, bit_index++)
 372                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 373                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 374                 bit_index = (bit_index + 7) & ~7u;
 375             }
 376         }
 377         else
 378         {
 379             const wxByte r_mask = image.GetMaskRed();
 380             const wxByte g_mask = image.GetMaskGreen();
 381             const wxByte b_mask = image.GetMaskBlue();
 382             const wxByte* in = image.GetData();
 383             for (int y = 0; y < h; y++)
 384             {
 385                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 386                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 387                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 388                 bit_index = (bit_index + 7) & ~7u;
 389             }
 390         }
 391         wxMask* mask = new wxMask;
 392         mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
 393         SetMask(mask);
 394         delete[] out;
 395     }
 396     return IsOk();
 397 }
 398
 399 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 400 {
 401     wxASSERT(image.HasAlpha());
 402
 403     int width = image.GetWidth();
 404     int height = image.GetHeight();
 405
 406     Create(width, height, 32);
 407     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 408     if (!pixbuf)
 409         return false;
 410
 411     // Copy the data:
 412     const unsigned char* in = image.GetData();
 413     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 414     unsigned char *alpha = image.GetAlpha();
 415
 416     int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 417
 418     for (int y = 0; y < height; y++, out += rowpad)
 419     {
 420         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 421         {
 422             out[0] = in[0];
 423             out[1] = in[1];
 424             out[2] = in[2];
 425             out[3] = *alpha;
 426         }
 427     }
 428
 429     return true;
 430 }
 431
 432 wxImage wxBitmap::ConvertToImage() const
 433 {
 434     wxCHECK_MSG( IsOk(), wxNullImage, wxT("invalid bitmap") );
 435
 436     const int w = GetWidth();
 437     const int h = GetHeight();
 438     wxImage image(w, h, false);
 439     unsigned char *data = image.GetData();
 440
 441     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 442
 443     // prefer pixbuf if available, it will preserve alpha and should be quicker
 444     if (HasPixbuf())
 445     {
 446         GdkPixbuf *pixbuf = GetPixbuf();
 447         unsigned char* alpha = NULL;
 448         if (gdk_pixbuf_get_has_alpha(pixbuf))
 449         {
 450             image.SetAlpha();
 451             alpha = image.GetAlpha();
 452         }
 453         const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
 454         unsigned char *out = data;
 455         const int inc = 3 + int(alpha != NULL);
 456         const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 457
 458         for (int y = 0; y < h; y++, in += rowpad)
 459         {
 460             for (int x = 0; x < w; x++, in += inc, out += 3)
 461             {
 462                 out[0] = in[0];
 463                 out[1] = in[1];
 464                 out[2] = in[2];
 465                 if (alpha != NULL)
 466                     *alpha++ = in[3];
 467             }
 468         }
 469     }
 470     else
 471     {
 472         GdkPixmap* pixmap = GetPixmap();
 473         GdkPixmap* pixmap_invert = NULL;
 474         if (GetDepth() == 1)
 475         {
 476             // mono bitmaps are inverted, i.e. 0 is white
 477             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 478             wxGtkObject<GdkGC> gc(gdk_gc_new(pixmap_invert));
 479             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 480             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 481             pixmap = pixmap_invert;
 482         }
 483         // create a pixbuf which shares data with the wxImage
 484         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 485             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 486
 487         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 488
 489         g_object_unref(pixbuf);
 490         if (pixmap_invert != NULL)
 491             g_object_unref(pixmap_invert);
 492     }
 493     // convert mask, unless there is already alpha
 494     if (GetMask() && !image.HasAlpha())
 495     {
 496         // we hard code the mask colour for now but we could also make an
 497         // effort (and waste time) to choose a colour not present in the
 498         // image already to avoid having to fudge the pixels below --
 499         // whether it's worth to do it is unclear however
 500         const int MASK_RED = 1;
 501         const int MASK_GREEN = 2;
 502         const int MASK_BLUE = 3;
 503         const int MASK_BLUE_REPLACEMENT = 2;
 504
 505         image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 506         GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 507
 508         for (int y = 0; y < h; y++)
 509         {
 510             for (int x = 0; x < w; x++, data += 3)
 511             {
 512                 if (gdk_image_get_pixel(image_mask, x, y) == 0)
 513                 {
 514                     data[0] = MASK_RED;
 515                     data[1] = MASK_GREEN;
 516                     data[2] = MASK_BLUE;
 517                 }
 518                 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 519                 {
 520                     // we have to fudge the colour a bit to prevent
 521                     // this pixel from appearing transparent
 522                     data[2] = MASK_BLUE_REPLACEMENT;
 523                 }
 524             }
 525         }
 526         g_object_unref(image_mask);
 527     }
 528
 529     return image;
 530 }
 531
 532 #endif // wxUSE_IMAGE
 533
 534 int wxBitmap::GetHeight() const
 535 {
 536     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 537
 538     return M_BMPDATA->m_height;
 539 }
 540
 541 int wxBitmap::GetWidth() const
 542 {
 543     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 544
 545     return M_BMPDATA->m_width;
 546 }
 547
 548 int wxBitmap::GetDepth() const
 549 {
 550     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 551
 552     return M_BMPDATA->m_bpp;
 553 }
 554
 555 wxMask *wxBitmap::GetMask() const
 556 {
 557     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 558
 559     return M_BMPDATA->m_mask;
 560 }
 561
 562 void wxBitmap::SetMask( wxMask *mask )
 563 {
 564     wxCHECK_RET( IsOk(), wxT("invalid bitmap") );
 565
 566     AllocExclusive();
 567     delete M_BMPDATA->m_mask;
 568     M_BMPDATA->m_mask = mask;
 569 }
 570
 571 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 572 {
 573     *this = icon;
 574     return IsOk();
 575 }
 576
 577 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 578 {
 579     wxBitmap ret;
 580
 581     wxCHECK_MSG(IsOk(), ret, wxT("invalid bitmap"));
 582     wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
 583                 rect.x + rect.width <= M_BMPDATA->m_width &&
 584                 rect.y + rect.height <= M_BMPDATA->m_height,
 585                 ret, wxT("invalid bitmap region"));
 586
 587     if (HasPixbuf() || M_BMPDATA->m_bpp == 32)
 588     {
 589         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 590                                            gdk_pixbuf_get_has_alpha(GetPixbuf()),
 591                                            8, rect.width, rect.height);
 592         if (!pixbuf)
 593             return ret;
 594
 595         ret.SetPixbuf(pixbuf, M_BMPDATA->m_bpp);
 596         gdk_pixbuf_copy_area(GetPixbuf(),
 597                              rect.x, rect.y, rect.width, rect.height,
 598                              pixbuf, 0, 0);
 599     }
 600     else
 601     {
 602         ret.Create(rect.width, rect.height, M_BMPDATA->m_bpp);
 603         wxGtkObject<GdkGC> gc(gdk_gc_new( ret.GetPixmap() ));
 604         gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 605     }
 606     // make mask, unless there is already alpha
 607     if (GetMask() && !HasAlpha())
 608     {
 609         wxMask *mask = new wxMask;
 610         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 611
 612         wxGtkObject<GdkGC> gc(gdk_gc_new( mask->m_bitmap ));
 613         gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
 614
 615         ret.SetMask( mask );
 616     }
 617
 618     return ret;
 619 }
 620
 621 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 622 {
 623     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 624
 625 #if wxUSE_IMAGE
 626     // Try to save the bitmap via wxImage handlers:
 627     wxImage image = ConvertToImage();
 628     return image.Ok() && image.SaveFile(name, type);
 629 #else // !wxUSE_IMAGE
 630     wxUnusedVar(name);
 631     wxUnusedVar(type);
 632
 633     return false;
 634 #endif // wxUSE_IMAGE
 635 }
 636
 637 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 638 {
 639     UnRef();
 640
 641     if (type == wxBITMAP_TYPE_XPM)
 642     {
 643         GdkBitmap *mask = NULL;
 644         SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
 645         if (!M_BMPDATA)
 646             return false;   // do not set the mask
 647
 648         if (mask)
 649         {
 650             M_BMPDATA->m_mask = new wxMask;
 651             M_BMPDATA->m_mask->m_bitmap = mask;
 652         }
 653     }
 654 #if wxUSE_IMAGE
 655     else // try if wxImage can load it
 656     {
 657         wxImage image;
 658         if (image.LoadFile(name, type) && image.Ok())
 659             CreateFromImage(image, -1);
 660     }
 661 #endif // wxUSE_IMAGE
 662
 663     return IsOk();
 664 }
 665
 666 #if wxUSE_PALETTE
 667 wxPalette *wxBitmap::GetPalette() const
 668 {
 669     wxCHECK_MSG(IsOk(), NULL, wxT("invalid bitmap"));
 670
 671     return M_BMPDATA->m_palette;
 672 }
 673
 674 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 675 {
 676     // TODO
 677 }
 678 #endif // wxUSE_PALETTE
 679
 680 void wxBitmap::SetHeight( int height )
 681 {
 682     AllocExclusive();
 683     M_BMPDATA->m_height = height;
 684 }
 685
 686 void wxBitmap::SetWidth( int width )
 687 {
 688     AllocExclusive();
 689     M_BMPDATA->m_width = width;
 690 }
 691
 692 void wxBitmap::SetDepth( int depth )
 693 {
 694     AllocExclusive();
 695     M_BMPDATA->m_bpp = depth;
 696 }
 697
 698 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 699 {
 700     if (!pixmap)
 701         return;
 702
 703     if (!m_refData)
 704         m_refData = new wxBitmapRefData;
 705
 706     // AllocExclusive should not be needed for this internal function
 707     wxASSERT(m_refData->GetRefCount() == 1);
 708     wxASSERT(M_BMPDATA->m_pixmap == NULL);
 709     M_BMPDATA->m_pixmap = pixmap;
 710     gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
 711     M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
 712     PurgeOtherRepresentations(Pixmap);
 713 }
 714
 715 GdkPixmap *wxBitmap::GetPixmap() const
 716 {
 717     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 718
 719     // create the pixmap on the fly if we use Pixbuf representation:
 720     if (M_BMPDATA->m_pixmap == NULL)
 721     {
 722         GdkPixmap** pmask = NULL;
 723         if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
 724         {
 725             // make new mask from alpha
 726             delete M_BMPDATA->m_mask;
 727             M_BMPDATA->m_mask = new wxMask;
 728             pmask = &M_BMPDATA->m_mask->m_bitmap;
 729         }
 730         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
 731                                           &M_BMPDATA->m_pixmap,
 732                                           pmask,
 733                                           0x80 /* alpha threshold */);
 734     }
 735
 736     return M_BMPDATA->m_pixmap;
 737 }
 738
 739 bool wxBitmap::HasPixmap() const
 740 {
 741     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 742
 743     return M_BMPDATA->m_pixmap != NULL;
 744 }
 745
 746 GdkPixbuf *wxBitmap::GetPixbuf() const
 747 {
 748     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 749
 750     if (M_BMPDATA->m_pixbuf == NULL)
 751     {
 752
 753         int width = GetWidth();
 754         int height = GetHeight();
 755
 756         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 757                                            GetMask() != NULL,
 758                                            8, width, height);
 759         M_BMPDATA->m_pixbuf = pixbuf;
 760         gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
 761                                      0, 0, 0, 0, width, height);
 762         // apply the mask to created pixbuf:
 763         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
 764         {
 765             GdkPixbuf *pmask =
 766                 gdk_pixbuf_get_from_drawable(NULL,
 767                                              M_BMPDATA->m_mask->GetBitmap(),
 768                                              NULL,
 769                                              0, 0, 0, 0, width, height);
 770             if (pmask)
 771             {
 772                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
 773                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
 774                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 775                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
 776
 777                 for (int y = 0; y < height;
 778                      y++, bmp += bmprowinc, mask += maskrowinc)
 779                 {
 780                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
 781                     {
 782                         if (mask[0] == 0 /*black pixel*/)
 783                             bmp[3] = 0;
 784                     }
 785                 }
 786
 787                 g_object_unref (pmask);
 788             }
 789         }
 790     }
 791
 792     return M_BMPDATA->m_pixbuf;
 793 }
 794
 795 bool wxBitmap::HasPixbuf() const
 796 {
 797     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 798
 799     return M_BMPDATA->m_pixbuf != NULL;
 800 }
 801
 802 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf, int depth)
 803 {
 804     if (!pixbuf)
 805         return;
 806
 807     if (!m_refData)
 808         m_refData = new wxBitmapRefData;
 809
 810     // AllocExclusive should not be needed for this internal function
 811     wxASSERT(m_refData->GetRefCount() == 1);
 812     wxASSERT(M_BMPDATA->m_pixbuf == NULL);
 813     M_BMPDATA->m_pixbuf = pixbuf;
 814     M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
 815     M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
 816     // if depth specified
 817     if (depth != 0)
 818         M_BMPDATA->m_bpp = depth;
 819     else if (M_BMPDATA->m_bpp == 0)
 820         // use something reasonable
 821         M_BMPDATA->m_bpp = wxTheApp->GetGdkVisual()->depth;
 822     PurgeOtherRepresentations(Pixbuf);
 823 }
 824
 825 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 826 {
 827     if (keep == Pixmap && HasPixbuf())
 828     {
 829         g_object_unref (M_BMPDATA->m_pixbuf);
 830         M_BMPDATA->m_pixbuf = NULL;
 831     }
 832     if (keep == Pixbuf && HasPixmap())
 833     {
 834         g_object_unref (M_BMPDATA->m_pixmap);
 835         M_BMPDATA->m_pixmap = NULL;
 836     }
 837 }
 838
 839 #ifdef wxHAS_RAW_BITMAP
 840 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 841 {
 842     void* bits = NULL;
 843     GdkPixbuf *pixbuf = GetPixbuf();
 844     const bool hasAlpha = HasAlpha();
 845
 846     // allow access if bpp is valid and matches existence of alpha
 847     if ( pixbuf && ((bpp == 24 && !hasAlpha) || (bpp == 32 && hasAlpha)) )
 848     {
 849         data.m_height = gdk_pixbuf_get_height( pixbuf );
 850         data.m_width = gdk_pixbuf_get_width( pixbuf );
 851         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
 852         bits = gdk_pixbuf_get_pixels(pixbuf);
 853     }
 854     return bits;
 855 }
 856
 857 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 858 {
 859 }
 860 #endif // wxHAS_RAW_BITMAP
 861
 862 bool wxBitmap::HasAlpha() const
 863 {
 864     return m_refData != NULL && M_BMPDATA->m_pixbuf != NULL &&
 865         gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf);
 866 }
 867
 868 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 869 {
 870     return new wxBitmapRefData;
 871 }
 872
 873 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 874 {
 875     const wxBitmapRefData* oldRef = static_cast<const wxBitmapRefData*>(data);
 876     wxBitmapRefData* newRef = new wxBitmapRefData;
 877     newRef->m_width = oldRef->m_width;
 878     newRef->m_height = oldRef->m_height;
 879     newRef->m_bpp = oldRef->m_bpp;
 880     if (oldRef->m_pixmap != NULL)
 881     {
 882         newRef->m_pixmap = gdk_pixmap_new(
 883             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 884             // use pixmap depth, m_bpp may not match
 885             gdk_drawable_get_depth(oldRef->m_pixmap));
 886         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_pixmap));
 887         gdk_draw_drawable(
 888             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 889     }
 890     if (oldRef->m_pixbuf != NULL)
 891     {
 892         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 893     }
 894     if (oldRef->m_mask != NULL)
 895     {
 896         newRef->m_mask = new wxMask;
 897         newRef->m_mask->m_bitmap = gdk_pixmap_new(
 898             oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
 899         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_mask->m_bitmap));
 900         gdk_draw_drawable(newRef->m_mask->m_bitmap,
 901             gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
 902     }
 903 #if wxUSE_PALETTE
 904     // implement this if SetPalette is ever implemented
 905     wxASSERT(oldRef->m_palette == NULL);
 906 #endif
 907
 908     return newRef;
 909 }
 910
 911 /* static */ void wxBitmap::InitStandardHandlers()
 912 {
 913     // TODO: Insert handler based on GdkPixbufs handler later
 914 }