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 wxBitmap& bitmap, const wxColour& colour )
  83 {
  84     m_bitmap = NULL;
  85     InitFromColour(bitmap, colour);
  86 }
  87
  88 #if wxUSE_PALETTE
  89 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  90 {
  91     m_bitmap = NULL;
  92     Create( bitmap, paletteIndex );
  93 }
  94 #endif // wxUSE_PALETTE
  95
  96 wxMask::wxMask( const wxBitmap& bitmap )
  97 {
  98     m_bitmap = NULL;
  99     InitFromMonoBitmap(bitmap);
 100 }
 101
 102 wxMask::~wxMask()
 103 {
 104     if (m_bitmap)
 105         g_object_unref (m_bitmap);
 106 }
 107
 108 void wxMask::FreeData()
 109 {
 110     if (m_bitmap)
 111     {
 112         g_object_unref (m_bitmap);
 113         m_bitmap = NULL;
 114     }
 115 }
 116
 117 bool wxMask::InitFromColour(const wxBitmap& bitmap, const wxColour& colour)
 118 {
 119     const int w = bitmap.GetWidth();
 120     const int h = bitmap.GetHeight();
 121
 122     // create mask as XBM format bitmap
 123
 124     // one bit per pixel, each row starts on a byte boundary
 125     const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 126     wxByte* out = new wxByte[out_size];
 127     // set bits are unmasked
 128     memset(out, 0xff, out_size);
 129     unsigned bit_index = 0;
 130     if (bitmap.HasPixbuf())
 131     {
 132         const wxByte r_mask = colour.Red();
 133         const wxByte g_mask = colour.Green();
 134         const wxByte b_mask = colour.Blue();
 135         GdkPixbuf* pixbuf = bitmap.GetPixbuf();
 136         const wxByte* in = gdk_pixbuf_get_pixels(pixbuf);
 137         const int inc = 3 + int(gdk_pixbuf_get_has_alpha(pixbuf) != 0);
 138         const int rowpadding = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 139         for (int y = 0; y < h; y++, in += rowpadding)
 140         {
 141             for (int x = 0; x < w; x++, in += inc, bit_index++)
 142                 if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 143                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 144             // move index to next byte boundary
 145             bit_index = (bit_index + 7) & ~7u;
 146         }
 147     }
 148     else
 149     {
 150         GdkImage* image = gdk_drawable_get_image(bitmap.GetPixmap(), 0, 0, w, h);
 151         GdkColormap* colormap = gdk_image_get_colormap(image);
 152         guint32 mask_pixel;
 153         if (colormap == NULL)
 154             // mono bitmap, white is pixel value 0
 155             mask_pixel = guint32(colour.Red() != 255 || colour.Green() != 255 || colour.Blue() != 255);
 156         else
 157         {
 158             wxColor c(colour);
 159             c.CalcPixel(colormap);
 160             mask_pixel = c.GetPixel();
 161         }
 162         for (int y = 0; y < h; y++)
 163         {
 164             for (int x = 0; x < w; x++, bit_index++)
 165                 if (gdk_image_get_pixel(image, x, y) == mask_pixel)
 166                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 167             bit_index = (bit_index + 7) & ~7u;
 168         }
 169         g_object_unref(image);
 170     }
 171     m_bitmap = gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h);
 172     delete[] out;
 173     return true;
 174 }
 175
 176 bool wxMask::InitFromMonoBitmap(const wxBitmap& bitmap)
 177 {
 178     if (!bitmap.IsOk()) return false;
 179
 180     wxCHECK_MSG( bitmap.GetDepth() == 1, false, wxT("Cannot create mask from colour bitmap") );
 181
 182     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 183
 184     if (!m_bitmap) return false;
 185
 186     wxGtkObject<GdkGC> gc(gdk_gc_new( m_bitmap ));
 187     gdk_gc_set_function(gc, GDK_COPY_INVERT);
 188     gdk_draw_drawable(m_bitmap, gc, bitmap.GetPixmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight());
 189
 190     return true;
 191 }
 192
 193 GdkBitmap *wxMask::GetBitmap() const
 194 {
 195     return m_bitmap;
 196 }
 197
 198 //-----------------------------------------------------------------------------
 199 // wxBitmapRefData
 200 //-----------------------------------------------------------------------------
 201
 202 class wxBitmapRefData: public wxGDIRefData
 203 {
 204 public:
 205     wxBitmapRefData(int width, int height, int depth);
 206     virtual ~wxBitmapRefData();
 207
 208     virtual bool IsOk() const;
 209
 210     GdkPixmap      *m_pixmap;
 211     GdkPixbuf      *m_pixbuf;
 212     wxMask         *m_mask;
 213     int             m_width;
 214     int             m_height;
 215     int             m_bpp;
 216     bool m_alphaRequested;
 217 };
 218
 219 wxBitmapRefData::wxBitmapRefData(int width, int height, int depth)
 220 {
 221     m_pixmap = NULL;
 222     m_pixbuf = NULL;
 223     m_mask = NULL;
 224     m_width = width;
 225     m_height = height;
 226     m_bpp = depth;
 227     if (m_bpp < 0)
 228         m_bpp = gdk_drawable_get_depth(wxGetRootWindow()->window);
 229     m_alphaRequested = depth == 32;
 230 }
 231
 232 wxBitmapRefData::~wxBitmapRefData()
 233 {
 234     if (m_pixmap)
 235         g_object_unref (m_pixmap);
 236     if (m_pixbuf)
 237         g_object_unref (m_pixbuf);
 238     delete m_mask;
 239 }
 240
 241 bool wxBitmapRefData::IsOk() const
 242 {
 243     return m_bpp != 0;
 244 }
 245
 246 //-----------------------------------------------------------------------------
 247 // wxBitmap
 248 //-----------------------------------------------------------------------------
 249
 250 #define M_BMPDATA static_cast<wxBitmapRefData*>(m_refData)
 251
 252 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 253
 254 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 255 {
 256     LoadFile(filename, type);
 257 }
 258
 259 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 260 {
 261     wxASSERT(depth == 1);
 262     if (width > 0 && height > 0 && depth == 1)
 263     {
 264         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 265     }
 266 }
 267
 268 wxBitmap::wxBitmap(const char* const* bits)
 269 {
 270     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 271
 272     GdkBitmap* mask = NULL;
 273     SetPixmap(gdk_pixmap_create_from_xpm_d(wxGetRootWindow()->window, &mask, NULL, const_cast<char**>(bits)));
 274     if (!M_BMPDATA)
 275         return;
 276
 277     if (M_BMPDATA->m_pixmap != NULL && mask != NULL)
 278     {
 279         M_BMPDATA->m_mask = new wxMask;
 280         M_BMPDATA->m_mask->m_bitmap = mask;
 281     }
 282 }
 283
 284 wxBitmap::~wxBitmap()
 285 {
 286 }
 287
 288 bool wxBitmap::Create( int width, int height, int depth )
 289 {
 290     UnRef();
 291     wxCHECK_MSG(width >= 0 && height >= 0, false, "invalid bitmap size");
 292     m_refData = new wxBitmapRefData(width, height, depth);
 293     return true;
 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 = GetPixbuf();
 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
 583     const int w = rect.width;
 584     const int h = rect.height;
 585     const wxBitmapRefData* bmpData = M_BMPDATA;
 586
 587     wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
 588                 rect.x + w <= bmpData->m_width &&
 589                 rect.y + h <= bmpData->m_height,
 590                 ret, wxT("invalid bitmap region"));
 591
 592     wxBitmapRefData* newRef = new wxBitmapRefData(*bmpData);
 593     ret.m_refData = newRef;
 594     newRef->m_width = w;
 595     newRef->m_height = h;
 596
 597     if (bmpData->m_pixbuf)
 598     {
 599         GdkPixbuf* pixbuf =
 600             gdk_pixbuf_new_subpixbuf(bmpData->m_pixbuf, rect.x, rect.y, w, h);
 601         newRef->m_pixbuf = gdk_pixbuf_copy(pixbuf);
 602         g_object_unref(pixbuf);
 603     }
 604     if (bmpData->m_pixmap)
 605     {
 606         newRef->m_pixmap = gdk_pixmap_new(bmpData->m_pixmap, w, h, -1);
 607         GdkGC* gc = gdk_gc_new(newRef->m_pixmap);
 608         gdk_draw_drawable(
 609             newRef->m_pixmap, gc, bmpData->m_pixmap, rect.x, rect.y, 0, 0, w, h);
 610         g_object_unref(gc);
 611     }
 612     newRef->m_mask = NULL;
 613     if (bmpData->m_mask && bmpData->m_mask->m_bitmap)
 614     {
 615         GdkPixmap* sub_mask = gdk_pixmap_new(bmpData->m_mask->m_bitmap, w, h, 1);
 616         newRef->m_mask = new wxMask;
 617         newRef->m_mask->m_bitmap = sub_mask;
 618         GdkGC* gc = gdk_gc_new(sub_mask);
 619         gdk_draw_drawable(
 620             sub_mask, gc, bmpData->m_mask->m_bitmap, rect.x, rect.y, 0, 0, w, h);
 621         g_object_unref(gc);
 622     }
 623
 624     return ret;
 625 }
 626
 627 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 628 {
 629     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 630
 631 #if wxUSE_IMAGE
 632     // Try to save the bitmap via wxImage handlers:
 633     wxImage image = ConvertToImage();
 634     return image.Ok() && image.SaveFile(name, type);
 635 #else // !wxUSE_IMAGE
 636     wxUnusedVar(name);
 637     wxUnusedVar(type);
 638
 639     return false;
 640 #endif // wxUSE_IMAGE
 641 }
 642
 643 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 644 {
 645     UnRef();
 646
 647     if (type == wxBITMAP_TYPE_XPM)
 648     {
 649         GdkBitmap *mask = NULL;
 650         SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
 651         if (!M_BMPDATA)
 652             return false;   // do not set the mask
 653
 654         if (mask)
 655         {
 656             M_BMPDATA->m_mask = new wxMask;
 657             M_BMPDATA->m_mask->m_bitmap = mask;
 658         }
 659     }
 660 #if wxUSE_IMAGE
 661     else // try if wxImage can load it
 662     {
 663         wxImage image;
 664         if (image.LoadFile(name, type) && image.Ok())
 665             CreateFromImage(image, -1);
 666     }
 667 #endif // wxUSE_IMAGE
 668
 669     return IsOk();
 670 }
 671
 672 #if wxUSE_PALETTE
 673 wxPalette *wxBitmap::GetPalette() const
 674 {
 675     return NULL;
 676 }
 677
 678 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 679 {
 680     // TODO
 681 }
 682 #endif // wxUSE_PALETTE
 683
 684 void wxBitmap::SetHeight( int height )
 685 {
 686     AllocExclusive();
 687     M_BMPDATA->m_height = height;
 688 }
 689
 690 void wxBitmap::SetWidth( int width )
 691 {
 692     AllocExclusive();
 693     M_BMPDATA->m_width = width;
 694 }
 695
 696 void wxBitmap::SetDepth( int depth )
 697 {
 698     AllocExclusive();
 699     M_BMPDATA->m_bpp = depth;
 700 }
 701
 702 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 703 {
 704     UnRef();
 705
 706     if (!pixmap)
 707         return;
 708
 709     int w, h;
 710     gdk_drawable_get_size(pixmap, &w, &h);
 711     wxBitmapRefData* bmpData = new wxBitmapRefData(w, h, 0);
 712     m_refData = bmpData;
 713     bmpData->m_pixmap = pixmap;
 714     bmpData->m_bpp = gdk_drawable_get_depth(pixmap);
 715 }
 716
 717 GdkPixmap *wxBitmap::GetPixmap() const
 718 {
 719     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 720
 721     wxBitmapRefData* bmpData = M_BMPDATA;
 722     if (bmpData->m_pixmap)
 723         return bmpData->m_pixmap;
 724
 725     if (bmpData->m_pixbuf)
 726     {
 727         GdkPixmap** mask_pixmap = NULL;
 728         if (gdk_pixbuf_get_has_alpha(bmpData->m_pixbuf))
 729         {
 730             // make new mask from alpha
 731             delete bmpData->m_mask;
 732             bmpData->m_mask = new wxMask;
 733             mask_pixmap = &bmpData->m_mask->m_bitmap;
 734         }
 735         gdk_pixbuf_render_pixmap_and_mask(
 736             bmpData->m_pixbuf, &bmpData->m_pixmap, mask_pixmap, 128);
 737     }
 738     else
 739     {
 740         bmpData->m_pixmap = gdk_pixmap_new(wxGetRootWindow()->window,
 741             bmpData->m_width, bmpData->m_height, bmpData->m_bpp == 1 ? 1 : -1);
 742     }
 743     return bmpData->m_pixmap;
 744 }
 745
 746 bool wxBitmap::HasPixmap() const
 747 {
 748     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 749
 750     return M_BMPDATA->m_pixmap != NULL;
 751 }
 752
 753 GdkPixbuf *wxBitmap::GetPixbuf() const
 754 {
 755     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 756
 757     wxBitmapRefData* bmpData = M_BMPDATA;
 758     if (bmpData->m_pixbuf)
 759         return bmpData->m_pixbuf;
 760
 761     const int w = bmpData->m_width;
 762     const int h = bmpData->m_height;
 763     GdkPixmap* mask = NULL;
 764     if (bmpData->m_mask)
 765         mask = bmpData->m_mask->m_bitmap;
 766     const bool useAlpha = bmpData->m_alphaRequested || mask;
 767     bmpData->m_pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, useAlpha, 8, w, h);
 768     if (bmpData->m_pixmap)
 769         PixmapToPixbuf(bmpData->m_pixmap, bmpData->m_pixbuf, w, h);
 770     if (mask)
 771         MaskToAlpha(mask, bmpData->m_pixbuf, w, h);
 772     return bmpData->m_pixbuf;
 773 }
 774
 775 bool wxBitmap::HasPixbuf() const
 776 {
 777     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 778
 779     return M_BMPDATA->m_pixbuf != NULL;
 780 }
 781
 782 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf)
 783 {
 784     UnRef();
 785
 786     if (!pixbuf)
 787         return;
 788
 789     int depth = -1;
 790     if (gdk_pixbuf_get_has_alpha(pixbuf))
 791         depth = 32;
 792     m_refData = new wxBitmapRefData(
 793         gdk_pixbuf_get_width(pixbuf), gdk_pixbuf_get_height(pixbuf), depth);
 794
 795     M_BMPDATA->m_pixbuf = pixbuf;
 796 }
 797
 798 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 799 {
 800     if (keep == Pixmap && HasPixbuf())
 801     {
 802         g_object_unref (M_BMPDATA->m_pixbuf);
 803         M_BMPDATA->m_pixbuf = NULL;
 804     }
 805     if (keep == Pixbuf && HasPixmap())
 806     {
 807         g_object_unref (M_BMPDATA->m_pixmap);
 808         M_BMPDATA->m_pixmap = NULL;
 809     }
 810 }
 811
 812 #ifdef wxHAS_RAW_BITMAP
 813 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 814 {
 815     void* bits = NULL;
 816     GdkPixbuf *pixbuf = GetPixbuf();
 817     const bool hasAlpha = HasAlpha();
 818
 819     // allow access if bpp is valid and matches existence of alpha
 820     if ( pixbuf && ((bpp == 24 && !hasAlpha) || (bpp == 32 && hasAlpha)) )
 821     {
 822         data.m_height = gdk_pixbuf_get_height( pixbuf );
 823         data.m_width = gdk_pixbuf_get_width( pixbuf );
 824         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
 825         bits = gdk_pixbuf_get_pixels(pixbuf);
 826     }
 827     return bits;
 828 }
 829
 830 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 831 {
 832 }
 833 #endif // wxHAS_RAW_BITMAP
 834
 835 bool wxBitmap::HasAlpha() const
 836 {
 837     const wxBitmapRefData* bmpData = M_BMPDATA;
 838     return bmpData && (bmpData->m_alphaRequested ||
 839         (bmpData->m_pixbuf && gdk_pixbuf_get_has_alpha(bmpData->m_pixbuf)));
 840 }
 841
 842 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 843 {
 844     return new wxBitmapRefData(0, 0, 0);
 845 }
 846
 847 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 848 {
 849     const wxBitmapRefData* oldRef = static_cast<const wxBitmapRefData*>(data);
 850     wxBitmapRefData* newRef = new wxBitmapRefData(*oldRef);
 851     if (oldRef->m_pixmap != NULL)
 852     {
 853         newRef->m_pixmap = gdk_pixmap_new(
 854             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 855             // use pixmap depth, m_bpp may not match
 856             gdk_drawable_get_depth(oldRef->m_pixmap));
 857         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_pixmap));
 858         gdk_draw_drawable(
 859             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 860     }
 861     if (oldRef->m_pixbuf != NULL)
 862     {
 863         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 864     }
 865     if (oldRef->m_mask != NULL)
 866     {
 867         newRef->m_mask = new wxMask;
 868         newRef->m_mask->m_bitmap = gdk_pixmap_new(
 869             oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
 870         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_mask->m_bitmap));
 871         gdk_draw_drawable(newRef->m_mask->m_bitmap,
 872             gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
 873     }
 874
 875     return newRef;
 876 }
 877
 878 /* static */ void wxBitmap::InitStandardHandlers()
 879 {
 880     // TODO: Insert handler based on GdkPixbufs handler later
 881 }