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