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 GdkBitmap *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     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 328
 329     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 330         return false;
 331
 332     // create pixbuf if image has alpha and requested depth is compatible
 333     if (image.HasAlpha() && (depth == -1 || depth == 32))
 334         return CreateFromImageAsPixbuf(image);
 335
 336     // otherwise create pixmap, if alpha is present it will be converted to mask
 337     return CreateFromImageAsPixmap(image, depth);
 338 }
 339
 340 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 341 {
 342     const int w = image.GetWidth();
 343     const int h = image.GetHeight();
 344     if (depth == 1)
 345     {
 346         // create XBM format bitmap
 347
 348         // one bit per pixel, each row starts on a byte boundary
 349         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 350         wxByte* out = new wxByte[out_size];
 351         // set bits are black
 352         memset(out, 0xff, out_size);
 353         const wxByte* in = image.GetData();
 354         unsigned bit_index = 0;
 355         for (int y = 0; y < h; y++)
 356         {
 357             for (int x = 0; x < w; x++, in += 3, bit_index++)
 358                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 359                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 360             // move index to next byte boundary
 361             bit_index = (bit_index + 7) & ~7u;
 362         }
 363         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 364         delete[] out;
 365
 366         if (!M_BMPDATA)     // SetPixmap may have failed
 367             return false;
 368     }
 369     else
 370     {
 371         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 372         if (!M_BMPDATA)
 373             return false;
 374
 375         wxGtkObject<GdkGC> gc(gdk_gc_new(M_BMPDATA->m_pixmap));
 376         gdk_draw_rgb_image(
 377             M_BMPDATA->m_pixmap, gc,
 378             0, 0, w, h,
 379             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 380     }
 381
 382     const wxByte* alpha = image.GetAlpha();
 383     if (alpha != NULL || image.HasMask())
 384     {
 385         // create mask as XBM format bitmap
 386
 387         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 388         wxByte* out = new wxByte[out_size];
 389         memset(out, 0xff, out_size);
 390         unsigned bit_index = 0;
 391         if (alpha != NULL)
 392         {
 393             for (int y = 0; y < h; y++)
 394             {
 395                 for (int x = 0; x < w; x++, bit_index++)
 396                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 397                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 398                 bit_index = (bit_index + 7) & ~7u;
 399             }
 400         }
 401         else
 402         {
 403             const wxByte r_mask = image.GetMaskRed();
 404             const wxByte g_mask = image.GetMaskGreen();
 405             const wxByte b_mask = image.GetMaskBlue();
 406             const wxByte* in = image.GetData();
 407             for (int y = 0; y < h; y++)
 408             {
 409                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 410                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 411                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 412                 bit_index = (bit_index + 7) & ~7u;
 413             }
 414         }
 415         wxMask* mask = new wxMask;
 416         mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
 417         SetMask(mask);
 418         delete[] out;
 419     }
 420     return IsOk();
 421 }
 422
 423 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 424 {
 425     wxASSERT(image.HasAlpha());
 426
 427     int width = image.GetWidth();
 428     int height = image.GetHeight();
 429
 430     Create(width, height, 32);
 431     GdkPixbuf* pixbuf = GetPixbuf();
 432     if (!pixbuf)
 433         return false;
 434
 435     // Copy the data:
 436     const unsigned char* in = image.GetData();
 437     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 438     unsigned char *alpha = image.GetAlpha();
 439
 440     int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 441
 442     for (int y = 0; y < height; y++, out += rowpad)
 443     {
 444         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 445         {
 446             out[0] = in[0];
 447             out[1] = in[1];
 448             out[2] = in[2];
 449             out[3] = *alpha;
 450         }
 451     }
 452
 453     return true;
 454 }
 455
 456 wxImage wxBitmap::ConvertToImage() const
 457 {
 458     wxCHECK_MSG( IsOk(), wxNullImage, wxT("invalid bitmap") );
 459
 460     const int w = GetWidth();
 461     const int h = GetHeight();
 462     wxImage image(w, h, false);
 463     unsigned char *data = image.GetData();
 464
 465     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 466
 467     // prefer pixbuf if available, it will preserve alpha and should be quicker
 468     if (HasPixbuf())
 469     {
 470         GdkPixbuf *pixbuf = GetPixbuf();
 471         unsigned char* alpha = NULL;
 472         if (gdk_pixbuf_get_has_alpha(pixbuf))
 473         {
 474             image.SetAlpha();
 475             alpha = image.GetAlpha();
 476         }
 477         const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
 478         unsigned char *out = data;
 479         const int inc = 3 + int(alpha != NULL);
 480         const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 481
 482         for (int y = 0; y < h; y++, in += rowpad)
 483         {
 484             for (int x = 0; x < w; x++, in += inc, out += 3)
 485             {
 486                 out[0] = in[0];
 487                 out[1] = in[1];
 488                 out[2] = in[2];
 489                 if (alpha != NULL)
 490                     *alpha++ = in[3];
 491             }
 492         }
 493     }
 494     else
 495     {
 496         GdkPixmap* pixmap = GetPixmap();
 497         GdkPixmap* pixmap_invert = NULL;
 498         if (GetDepth() == 1)
 499         {
 500             // mono bitmaps are inverted, i.e. 0 is white
 501             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 502             wxGtkObject<GdkGC> gc(gdk_gc_new(pixmap_invert));
 503             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 504             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 505             pixmap = pixmap_invert;
 506         }
 507         // create a pixbuf which shares data with the wxImage
 508         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 509             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 510
 511         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 512
 513         g_object_unref(pixbuf);
 514         if (pixmap_invert != NULL)
 515             g_object_unref(pixmap_invert);
 516     }
 517     // convert mask, unless there is already alpha
 518     if (GetMask() && !image.HasAlpha())
 519     {
 520         // we hard code the mask colour for now but we could also make an
 521         // effort (and waste time) to choose a colour not present in the
 522         // image already to avoid having to fudge the pixels below --
 523         // whether it's worth to do it is unclear however
 524         const int MASK_RED = 1;
 525         const int MASK_GREEN = 2;
 526         const int MASK_BLUE = 3;
 527         const int MASK_BLUE_REPLACEMENT = 2;
 528
 529         image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 530         GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 531
 532         for (int y = 0; y < h; y++)
 533         {
 534             for (int x = 0; x < w; x++, data += 3)
 535             {
 536                 if (gdk_image_get_pixel(image_mask, x, y) == 0)
 537                 {
 538                     data[0] = MASK_RED;
 539                     data[1] = MASK_GREEN;
 540                     data[2] = MASK_BLUE;
 541                 }
 542                 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 543                 {
 544                     // we have to fudge the colour a bit to prevent
 545                     // this pixel from appearing transparent
 546                     data[2] = MASK_BLUE_REPLACEMENT;
 547                 }
 548             }
 549         }
 550         g_object_unref(image_mask);
 551     }
 552
 553     return image;
 554 }
 555
 556 #endif // wxUSE_IMAGE
 557
 558 int wxBitmap::GetHeight() const
 559 {
 560     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 561
 562     return M_BMPDATA->m_height;
 563 }
 564
 565 int wxBitmap::GetWidth() const
 566 {
 567     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 568
 569     return M_BMPDATA->m_width;
 570 }
 571
 572 int wxBitmap::GetDepth() const
 573 {
 574     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 575
 576     return M_BMPDATA->m_bpp;
 577 }
 578
 579 wxMask *wxBitmap::GetMask() const
 580 {
 581     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 582
 583     return M_BMPDATA->m_mask;
 584 }
 585
 586 void wxBitmap::SetMask( wxMask *mask )
 587 {
 588     wxCHECK_RET( IsOk(), wxT("invalid bitmap") );
 589
 590     AllocExclusive();
 591     delete M_BMPDATA->m_mask;
 592     M_BMPDATA->m_mask = mask;
 593 }
 594
 595 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 596 {
 597     *this = icon;
 598     return IsOk();
 599 }
 600
 601 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 602 {
 603     wxBitmap ret;
 604
 605     wxCHECK_MSG(IsOk(), ret, wxT("invalid bitmap"));
 606
 607     const int w = rect.width;
 608     const int h = rect.height;
 609     const wxBitmapRefData* bmpData = M_BMPDATA;
 610
 611     wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
 612                 rect.x + w <= bmpData->m_width &&
 613                 rect.y + h <= bmpData->m_height,
 614                 ret, wxT("invalid bitmap region"));
 615
 616     wxBitmapRefData * const newRef = new wxBitmapRefData(w, h, bmpData->m_bpp);
 617     ret.m_refData = newRef;
 618
 619     if (bmpData->m_pixbuf)
 620     {
 621         GdkPixbuf* pixbuf =
 622             gdk_pixbuf_new_subpixbuf(bmpData->m_pixbuf, rect.x, rect.y, w, h);
 623         newRef->m_pixbuf = gdk_pixbuf_copy(pixbuf);
 624         g_object_unref(pixbuf);
 625     }
 626     if (bmpData->m_pixmap)
 627     {
 628         newRef->m_pixmap = gdk_pixmap_new(bmpData->m_pixmap, w, h, -1);
 629         GdkGC* gc = gdk_gc_new(newRef->m_pixmap);
 630         gdk_draw_drawable(
 631             newRef->m_pixmap, gc, bmpData->m_pixmap, rect.x, rect.y, 0, 0, w, h);
 632         g_object_unref(gc);
 633     }
 634     if (bmpData->m_mask && bmpData->m_mask->m_bitmap)
 635     {
 636         GdkPixmap* sub_mask = gdk_pixmap_new(bmpData->m_mask->m_bitmap, w, h, 1);
 637         newRef->m_mask = new wxMask;
 638         newRef->m_mask->m_bitmap = sub_mask;
 639         GdkGC* gc = gdk_gc_new(sub_mask);
 640         gdk_draw_drawable(
 641             sub_mask, gc, bmpData->m_mask->m_bitmap, rect.x, rect.y, 0, 0, w, h);
 642         g_object_unref(gc);
 643     }
 644
 645     return ret;
 646 }
 647
 648 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 649 {
 650     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 651
 652 #if wxUSE_IMAGE
 653     wxImage image = ConvertToImage();
 654     if (image.IsOk() && image.SaveFile(name, type))
 655         return true;
 656 #endif
 657     const char* type_name = NULL;
 658     switch (type)
 659     {
 660         case wxBITMAP_TYPE_BMP:  type_name = "bmp";  break;
 661         case wxBITMAP_TYPE_ICO:  type_name = "ico";  break;
 662         case wxBITMAP_TYPE_JPEG: type_name = "jpeg"; break;
 663         case wxBITMAP_TYPE_PNG:  type_name = "png";  break;
 664         default: break;
 665     }
 666     return type_name &&
 667         gdk_pixbuf_save(GetPixbuf(), name.fn_str(), type_name, NULL, NULL);
 668 }
 669
 670 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 671 {
 672 #if wxUSE_IMAGE
 673     wxImage image;
 674     if (image.LoadFile(name, type) && image.IsOk())
 675         *this = wxBitmap(image);
 676     else
 677 #endif
 678     {
 679         wxUnusedVar(type); // The type is detected automatically by GDK.
 680
 681         UnRef();
 682         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_file(name.fn_str(), NULL);
 683         if (pixbuf)
 684             SetPixbuf(pixbuf);
 685     }
 686
 687     return IsOk();
 688 }
 689
 690 #if wxUSE_PALETTE
 691 wxPalette *wxBitmap::GetPalette() const
 692 {
 693     return NULL;
 694 }
 695
 696 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 697 {
 698     // TODO
 699 }
 700 #endif // wxUSE_PALETTE
 701
 702 void wxBitmap::SetHeight( int height )
 703 {
 704     AllocExclusive();
 705     M_BMPDATA->m_height = height;
 706 }
 707
 708 void wxBitmap::SetWidth( int width )
 709 {
 710     AllocExclusive();
 711     M_BMPDATA->m_width = width;
 712 }
 713
 714 void wxBitmap::SetDepth( int depth )
 715 {
 716     AllocExclusive();
 717     M_BMPDATA->m_bpp = depth;
 718 }
 719
 720 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 721 {
 722     UnRef();
 723
 724     if (!pixmap)
 725         return;
 726
 727     int w, h;
 728     gdk_drawable_get_size(pixmap, &w, &h);
 729     wxBitmapRefData* bmpData = new wxBitmapRefData(w, h, 0);
 730     m_refData = bmpData;
 731     bmpData->m_pixmap = pixmap;
 732     bmpData->m_bpp = gdk_drawable_get_depth(pixmap);
 733 }
 734
 735 GdkPixmap *wxBitmap::GetPixmap() const
 736 {
 737     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 738
 739     wxBitmapRefData* bmpData = M_BMPDATA;
 740     if (bmpData->m_pixmap)
 741         return bmpData->m_pixmap;
 742
 743     if (bmpData->m_pixbuf)
 744     {
 745         GdkPixmap** mask_pixmap = NULL;
 746         if (gdk_pixbuf_get_has_alpha(bmpData->m_pixbuf))
 747         {
 748             // make new mask from alpha
 749             delete bmpData->m_mask;
 750             bmpData->m_mask = new wxMask;
 751             mask_pixmap = &bmpData->m_mask->m_bitmap;
 752         }
 753         gdk_pixbuf_render_pixmap_and_mask(
 754             bmpData->m_pixbuf, &bmpData->m_pixmap, mask_pixmap, 128);
 755     }
 756     else
 757     {
 758         bmpData->m_pixmap = gdk_pixmap_new(wxGetRootWindow()->window,
 759             bmpData->m_width, bmpData->m_height, bmpData->m_bpp == 1 ? 1 : -1);
 760     }
 761     return bmpData->m_pixmap;
 762 }
 763
 764 bool wxBitmap::HasPixmap() const
 765 {
 766     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 767
 768     return M_BMPDATA->m_pixmap != NULL;
 769 }
 770
 771 GdkPixbuf *wxBitmap::GetPixbuf() const
 772 {
 773     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 774
 775     wxBitmapRefData* bmpData = M_BMPDATA;
 776     if (bmpData->m_pixbuf)
 777         return bmpData->m_pixbuf;
 778
 779     const int w = bmpData->m_width;
 780     const int h = bmpData->m_height;
 781     GdkPixmap* mask = NULL;
 782     if (bmpData->m_mask)
 783         mask = bmpData->m_mask->m_bitmap;
 784     const bool useAlpha = bmpData->m_alphaRequested || mask;
 785     bmpData->m_pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, useAlpha, 8, w, h);
 786     if (bmpData->m_pixmap)
 787         PixmapToPixbuf(bmpData->m_pixmap, bmpData->m_pixbuf, w, h);
 788     if (mask)
 789         MaskToAlpha(mask, bmpData->m_pixbuf, w, h);
 790     return bmpData->m_pixbuf;
 791 }
 792
 793 bool wxBitmap::HasPixbuf() const
 794 {
 795     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 796
 797     return M_BMPDATA->m_pixbuf != NULL;
 798 }
 799
 800 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf)
 801 {
 802     UnRef();
 803
 804     if (!pixbuf)
 805         return;
 806
 807     int depth = -1;
 808     if (gdk_pixbuf_get_has_alpha(pixbuf))
 809         depth = 32;
 810     m_refData = new wxBitmapRefData(
 811         gdk_pixbuf_get_width(pixbuf), gdk_pixbuf_get_height(pixbuf), depth);
 812
 813     M_BMPDATA->m_pixbuf = pixbuf;
 814 }
 815
 816 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 817 {
 818     if (keep == Pixmap && HasPixbuf())
 819     {
 820         g_object_unref (M_BMPDATA->m_pixbuf);
 821         M_BMPDATA->m_pixbuf = NULL;
 822     }
 823     if (keep == Pixbuf && HasPixmap())
 824     {
 825         g_object_unref (M_BMPDATA->m_pixmap);
 826         M_BMPDATA->m_pixmap = NULL;
 827     }
 828 }
 829
 830 #ifdef wxHAS_RAW_BITMAP
 831 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 832 {
 833     void* bits = NULL;
 834     GdkPixbuf *pixbuf = GetPixbuf();
 835     const bool hasAlpha = HasAlpha();
 836
 837     // allow access if bpp is valid and matches existence of alpha
 838     if ( pixbuf && ((bpp == 24 && !hasAlpha) || (bpp == 32 && hasAlpha)) )
 839     {
 840         data.m_height = gdk_pixbuf_get_height( pixbuf );
 841         data.m_width = gdk_pixbuf_get_width( pixbuf );
 842         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
 843         bits = gdk_pixbuf_get_pixels(pixbuf);
 844     }
 845     return bits;
 846 }
 847
 848 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 849 {
 850 }
 851 #endif // wxHAS_RAW_BITMAP
 852
 853 bool wxBitmap::HasAlpha() const
 854 {
 855     const wxBitmapRefData* bmpData = M_BMPDATA;
 856     return bmpData && (bmpData->m_alphaRequested ||
 857         (bmpData->m_pixbuf && gdk_pixbuf_get_has_alpha(bmpData->m_pixbuf)));
 858 }
 859
 860 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 861 {
 862     return new wxBitmapRefData(0, 0, 0);
 863 }
 864
 865 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 866 {
 867     const wxBitmapRefData* oldRef = static_cast<const wxBitmapRefData*>(data);
 868     wxBitmapRefData * const newRef = new wxBitmapRefData(oldRef->m_width,
 869                                                          oldRef->m_height,
 870                                                          oldRef->m_bpp);
 871     if (oldRef->m_pixmap != NULL)
 872     {
 873         newRef->m_pixmap = gdk_pixmap_new(
 874             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 875             // use pixmap depth, m_bpp may not match
 876             gdk_drawable_get_depth(oldRef->m_pixmap));
 877         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_pixmap));
 878         gdk_draw_drawable(
 879             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 880     }
 881     if (oldRef->m_pixbuf != NULL)
 882     {
 883         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 884     }
 885     if (oldRef->m_mask != NULL)
 886     {
 887         newRef->m_mask = new wxMask(*oldRef->m_mask);
 888     }
 889
 890     return newRef;
 891 }
 892
 893 /* static */ void wxBitmap::InitStandardHandlers()
 894 {
 895     // TODO: Insert handler based on GdkPixbufs handler later
 896 }