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