src/gtk/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/bitmap.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/bitmap.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/app.h"
  17     #include "wx/palette.h"
  18     #include "wx/icon.h"
  19     #include "wx/math.h"
  20     #include "wx/image.h"
  21     #include "wx/colour.h"
  22 #endif
  23
  24 #include "wx/rawbmp.h"
  25
  26 #include "wx/gtk/private/object.h"
  27
  28 #include <gtk/gtk.h>
  29
  30 //-----------------------------------------------------------------------------
  31 // data
  32 //-----------------------------------------------------------------------------
  33
  34 extern GtkWidget *wxGetRootWindow();
  35
  36 //-----------------------------------------------------------------------------
  37 // wxMask
  38 //-----------------------------------------------------------------------------
  39
  40 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  41
  42 wxMask::wxMask()
  43 {
  44     m_bitmap = NULL;
  45 }
  46
  47 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  48 {
  49     m_bitmap = NULL;
  50     Create( bitmap, colour );
  51 }
  52
  53 #if wxUSE_PALETTE
  54 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  55 {
  56     m_bitmap = NULL;
  57     Create( bitmap, paletteIndex );
  58 }
  59 #endif // wxUSE_PALETTE
  60
  61 wxMask::wxMask( const wxBitmap& bitmap )
  62 {
  63     m_bitmap = NULL;
  64     Create( bitmap );
  65 }
  66
  67 wxMask::~wxMask()
  68 {
  69     if (m_bitmap)
  70         g_object_unref (m_bitmap);
  71 }
  72
  73 bool wxMask::Create( const wxBitmap& bitmap,
  74                      const wxColour& colour )
  75 {
  76     if (m_bitmap)
  77     {
  78         g_object_unref (m_bitmap);
  79         m_bitmap = NULL;
  80     }
  81
  82     const int w = bitmap.GetWidth();
  83     const int h = bitmap.GetHeight();
  84
  85     // create mask as XBM format bitmap
  86
  87     // one bit per pixel, each row starts on a byte boundary
  88     const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
  89     wxByte* out = new wxByte[out_size];
  90     // set bits are unmasked
  91     memset(out, 0xff, out_size);
  92     unsigned bit_index = 0;
  93     if (bitmap.HasPixbuf())
  94     {
  95         const wxByte r_mask = colour.Red();
  96         const wxByte g_mask = colour.Green();
  97         const wxByte b_mask = colour.Blue();
  98         GdkPixbuf* pixbuf = bitmap.GetPixbuf();
  99         const wxByte* in = gdk_pixbuf_get_pixels(pixbuf);
 100         const int inc = 3 + int(gdk_pixbuf_get_has_alpha(pixbuf) != 0);
 101         const int rowpadding = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 102         for (int y = 0; y < h; y++, in += rowpadding)
 103         {
 104             for (int x = 0; x < w; x++, in += inc, bit_index++)
 105                 if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 106                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 107             // move index to next byte boundary
 108             bit_index = (bit_index + 7) & ~7u;
 109         }
 110     }
 111     else
 112     {
 113         GdkImage* image = gdk_drawable_get_image(bitmap.GetPixmap(), 0, 0, w, h);
 114         GdkColormap* colormap = gdk_image_get_colormap(image);
 115         guint32 mask_pixel;
 116         if (colormap == NULL)
 117             // mono bitmap, white is pixel value 0
 118             mask_pixel = guint32(colour.Red() != 255 || colour.Green() != 255 || colour.Blue() != 255);
 119         else
 120         {
 121             wxColor c(colour);
 122             c.CalcPixel(colormap);
 123             mask_pixel = c.GetPixel();
 124         }
 125         for (int y = 0; y < h; y++)
 126         {
 127             for (int x = 0; x < w; x++, bit_index++)
 128                 if (gdk_image_get_pixel(image, x, y) == mask_pixel)
 129                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 130             bit_index = (bit_index + 7) & ~7u;
 131         }
 132         g_object_unref(image);
 133     }
 134     m_bitmap = gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h);
 135     delete[] out;
 136     return true;
 137 }
 138
 139 #if wxUSE_PALETTE
 140 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 141 {
 142     unsigned char r,g,b;
 143     wxPalette *pal = bitmap.GetPalette();
 144
 145     wxCHECK_MSG( pal, false, wxT("Cannot create mask from bitmap without palette") );
 146
 147     pal->GetRGB(paletteIndex, &r, &g, &b);
 148
 149     return Create(bitmap, wxColour(r, g, b));
 150 }
 151 #endif // wxUSE_PALETTE
 152
 153 bool wxMask::Create( const wxBitmap& bitmap )
 154 {
 155     if (m_bitmap)
 156     {
 157         g_object_unref (m_bitmap);
 158         m_bitmap = NULL;
 159     }
 160
 161     if (!bitmap.IsOk()) return false;
 162
 163     wxCHECK_MSG( bitmap.GetDepth() == 1, false, wxT("Cannot create mask from colour bitmap") );
 164
 165     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 166
 167     if (!m_bitmap) return false;
 168
 169     wxGtkObject<GdkGC> gc(gdk_gc_new( m_bitmap ));
 170     gdk_gc_set_function(gc, GDK_COPY_INVERT);
 171     gdk_draw_drawable(m_bitmap, gc, bitmap.GetPixmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight());
 172
 173     return true;
 174 }
 175
 176 GdkBitmap *wxMask::GetBitmap() const
 177 {
 178     return m_bitmap;
 179 }
 180
 181 //-----------------------------------------------------------------------------
 182 // wxBitmapRefData
 183 //-----------------------------------------------------------------------------
 184
 185 class wxBitmapRefData: public wxGDIRefData
 186 {
 187 public:
 188     wxBitmapRefData();
 189     virtual ~wxBitmapRefData();
 190
 191     virtual bool IsOk() const { return m_pixmap || m_pixbuf; }
 192
 193     GdkPixmap      *m_pixmap;
 194     GdkPixbuf      *m_pixbuf;
 195     wxMask         *m_mask;
 196     int             m_width;
 197     int             m_height;
 198     int             m_bpp;
 199 #if wxUSE_PALETTE
 200     wxPalette      *m_palette;
 201 #endif // wxUSE_PALETTE
 202 };
 203
 204 wxBitmapRefData::wxBitmapRefData()
 205 {
 206     m_pixmap = NULL;
 207     m_pixbuf = NULL;
 208     m_mask = NULL;
 209     m_width = 0;
 210     m_height = 0;
 211     m_bpp = 0;
 212 #if wxUSE_PALETTE
 213     m_palette = NULL;
 214 #endif // wxUSE_PALETTE
 215 }
 216
 217 wxBitmapRefData::~wxBitmapRefData()
 218 {
 219     if (m_pixmap)
 220         g_object_unref (m_pixmap);
 221     if (m_pixbuf)
 222         g_object_unref (m_pixbuf);
 223     delete m_mask;
 224 #if wxUSE_PALETTE
 225     delete m_palette;
 226 #endif // wxUSE_PALETTE
 227 }
 228
 229
 230 //-----------------------------------------------------------------------------
 231 // wxBitmap
 232 //-----------------------------------------------------------------------------
 233
 234 #define M_BMPDATA static_cast<wxBitmapRefData*>(m_refData)
 235
 236 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 237
 238 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 239 {
 240     LoadFile(filename, type);
 241 }
 242
 243 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 244 {
 245     wxASSERT(depth == 1);
 246     if (width > 0 && height > 0 && depth == 1)
 247     {
 248         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 249     }
 250 }
 251
 252 wxBitmap::wxBitmap(const char* const* bits)
 253 {
 254     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 255
 256     GdkBitmap* mask = NULL;
 257     SetPixmap(gdk_pixmap_create_from_xpm_d(wxGetRootWindow()->window, &mask, NULL, const_cast<char**>(bits)));
 258     if (!M_BMPDATA)
 259         return;
 260
 261     if (M_BMPDATA->m_pixmap != NULL && mask != NULL)
 262     {
 263         M_BMPDATA->m_mask = new wxMask;
 264         M_BMPDATA->m_mask->m_bitmap = mask;
 265     }
 266 }
 267
 268 wxBitmap::~wxBitmap()
 269 {
 270 }
 271
 272 bool wxBitmap::Create( int width, int height, int depth )
 273 {
 274     UnRef();
 275
 276     if ( width <= 0 || height <= 0 )
 277     {
 278         return false;
 279     }
 280
 281     const GdkVisual* visual = wxTheApp->GetGdkVisual();
 282
 283     if (depth == 32)
 284     {
 285         SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8, width, height), 32);
 286
 287         if (!M_BMPDATA)
 288             return false;
 289
 290         // must initialize alpha, otherwise GetPixmap()
 291         // will create a mask out of garbage
 292         gdk_pixbuf_fill(M_BMPDATA->m_pixbuf, 0x000000ff);
 293     }
 294     else if (depth == 24)
 295     {
 296         if (visual->depth == depth)
 297             SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 298         else
 299             SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8, width, height), 24);
 300     }
 301     else
 302     {
 303         if (depth != 1)
 304         {
 305             if (depth == -1)
 306                 depth = visual->depth;
 307         }
 308         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 309     }
 310
 311     return IsOk();
 312 }
 313
 314 #if wxUSE_IMAGE
 315
 316 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 317 {
 318     UnRef();
 319
 320     wxCHECK_MSG( image.IsOk(), false, wxT("invalid image") );
 321     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 322
 323     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 324         return false;
 325
 326     // create pixbuf if image has alpha and requested depth is compatible
 327     if (image.HasAlpha() && (depth == -1 || depth == 32))
 328         return CreateFromImageAsPixbuf(image);
 329
 330     // otherwise create pixmap, if alpha is present it will be converted to mask
 331     return CreateFromImageAsPixmap(image, depth);
 332 }
 333
 334 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 335 {
 336     const int w = image.GetWidth();
 337     const int h = image.GetHeight();
 338     if (depth == 1)
 339     {
 340         // create XBM format bitmap
 341
 342         // one bit per pixel, each row starts on a byte boundary
 343         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 344         wxByte* out = new wxByte[out_size];
 345         // set bits are black
 346         memset(out, 0xff, out_size);
 347         const wxByte* in = image.GetData();
 348         unsigned bit_index = 0;
 349         for (int y = 0; y < h; y++)
 350         {
 351             for (int x = 0; x < w; x++, in += 3, bit_index++)
 352                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 353                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 354             // move index to next byte boundary
 355             bit_index = (bit_index + 7) & ~7u;
 356         }
 357         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 358         delete[] out;
 359
 360         if (!M_BMPDATA)     // SetPixmap may have failed
 361             return false;
 362     }
 363     else
 364     {
 365         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 366         if (!M_BMPDATA)
 367             return false;
 368
 369         wxGtkObject<GdkGC> gc(gdk_gc_new(M_BMPDATA->m_pixmap));
 370         gdk_draw_rgb_image(
 371             M_BMPDATA->m_pixmap, gc,
 372             0, 0, w, h,
 373             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 374     }
 375
 376     const wxByte* alpha = image.GetAlpha();
 377     if (alpha != NULL || image.HasMask())
 378     {
 379         // create mask as XBM format bitmap
 380
 381         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 382         wxByte* out = new wxByte[out_size];
 383         memset(out, 0xff, out_size);
 384         unsigned bit_index = 0;
 385         if (alpha != NULL)
 386         {
 387             for (int y = 0; y < h; y++)
 388             {
 389                 for (int x = 0; x < w; x++, bit_index++)
 390                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 391                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 392                 bit_index = (bit_index + 7) & ~7u;
 393             }
 394         }
 395         else
 396         {
 397             const wxByte r_mask = image.GetMaskRed();
 398             const wxByte g_mask = image.GetMaskGreen();
 399             const wxByte b_mask = image.GetMaskBlue();
 400             const wxByte* in = image.GetData();
 401             for (int y = 0; y < h; y++)
 402             {
 403                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 404                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 405                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 406                 bit_index = (bit_index + 7) & ~7u;
 407             }
 408         }
 409         wxMask* mask = new wxMask;
 410         mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
 411         SetMask(mask);
 412         delete[] out;
 413     }
 414     return IsOk();
 415 }
 416
 417 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 418 {
 419     wxASSERT(image.HasAlpha());
 420
 421     int width = image.GetWidth();
 422     int height = image.GetHeight();
 423
 424     Create(width, height, 32);
 425     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 426     if (!pixbuf)
 427         return false;
 428
 429     // Copy the data:
 430     const unsigned char* in = image.GetData();
 431     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 432     unsigned char *alpha = image.GetAlpha();
 433
 434     int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 435
 436     for (int y = 0; y < height; y++, out += rowpad)
 437     {
 438         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 439         {
 440             out[0] = in[0];
 441             out[1] = in[1];
 442             out[2] = in[2];
 443             out[3] = *alpha;
 444         }
 445     }
 446
 447     return true;
 448 }
 449
 450 wxImage wxBitmap::ConvertToImage() const
 451 {
 452     wxCHECK_MSG( IsOk(), wxNullImage, wxT("invalid bitmap") );
 453
 454     const int w = GetWidth();
 455     const int h = GetHeight();
 456     wxImage image(w, h, false);
 457     unsigned char *data = image.GetData();
 458
 459     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 460
 461     // prefer pixbuf if available, it will preserve alpha and should be quicker
 462     if (HasPixbuf())
 463     {
 464         GdkPixbuf *pixbuf = GetPixbuf();
 465         unsigned char* alpha = NULL;
 466         if (gdk_pixbuf_get_has_alpha(pixbuf))
 467         {
 468             image.SetAlpha();
 469             alpha = image.GetAlpha();
 470         }
 471         const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
 472         unsigned char *out = data;
 473         const int inc = 3 + int(alpha != NULL);
 474         const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 475
 476         for (int y = 0; y < h; y++, in += rowpad)
 477         {
 478             for (int x = 0; x < w; x++, in += inc, out += 3)
 479             {
 480                 out[0] = in[0];
 481                 out[1] = in[1];
 482                 out[2] = in[2];
 483                 if (alpha != NULL)
 484                     *alpha++ = in[3];
 485             }
 486         }
 487     }
 488     else
 489     {
 490         GdkPixmap* pixmap = GetPixmap();
 491         GdkPixmap* pixmap_invert = NULL;
 492         if (GetDepth() == 1)
 493         {
 494             // mono bitmaps are inverted, i.e. 0 is white
 495             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 496             wxGtkObject<GdkGC> gc(gdk_gc_new(pixmap_invert));
 497             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 498             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 499             pixmap = pixmap_invert;
 500         }
 501         // create a pixbuf which shares data with the wxImage
 502         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 503             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 504
 505         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 506
 507         g_object_unref(pixbuf);
 508         if (pixmap_invert != NULL)
 509             g_object_unref(pixmap_invert);
 510     }
 511     // convert mask, unless there is already alpha
 512     if (GetMask() && !image.HasAlpha())
 513     {
 514         // we hard code the mask colour for now but we could also make an
 515         // effort (and waste time) to choose a colour not present in the
 516         // image already to avoid having to fudge the pixels below --
 517         // whether it's worth to do it is unclear however
 518         const int MASK_RED = 1;
 519         const int MASK_GREEN = 2;
 520         const int MASK_BLUE = 3;
 521         const int MASK_BLUE_REPLACEMENT = 2;
 522
 523         image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 524         GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 525
 526         for (int y = 0; y < h; y++)
 527         {
 528             for (int x = 0; x < w; x++, data += 3)
 529             {
 530                 if (gdk_image_get_pixel(image_mask, x, y) == 0)
 531                 {
 532                     data[0] = MASK_RED;
 533                     data[1] = MASK_GREEN;
 534                     data[2] = MASK_BLUE;
 535                 }
 536                 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 537                 {
 538                     // we have to fudge the colour a bit to prevent
 539                     // this pixel from appearing transparent
 540                     data[2] = MASK_BLUE_REPLACEMENT;
 541                 }
 542             }
 543         }
 544         g_object_unref(image_mask);
 545     }
 546
 547     return image;
 548 }
 549
 550 #endif // wxUSE_IMAGE
 551
 552 int wxBitmap::GetHeight() const
 553 {
 554     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 555
 556     return M_BMPDATA->m_height;
 557 }
 558
 559 int wxBitmap::GetWidth() const
 560 {
 561     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 562
 563     return M_BMPDATA->m_width;
 564 }
 565
 566 int wxBitmap::GetDepth() const
 567 {
 568     wxCHECK_MSG( IsOk(), -1, wxT("invalid bitmap") );
 569
 570     return M_BMPDATA->m_bpp;
 571 }
 572
 573 wxMask *wxBitmap::GetMask() const
 574 {
 575     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 576
 577     return M_BMPDATA->m_mask;
 578 }
 579
 580 void wxBitmap::SetMask( wxMask *mask )
 581 {
 582     wxCHECK_RET( IsOk(), wxT("invalid bitmap") );
 583
 584     AllocExclusive();
 585     delete M_BMPDATA->m_mask;
 586     M_BMPDATA->m_mask = mask;
 587 }
 588
 589 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 590 {
 591     *this = icon;
 592     return IsOk();
 593 }
 594
 595 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 596 {
 597     wxBitmap ret;
 598
 599     wxCHECK_MSG(IsOk(), ret, wxT("invalid bitmap"));
 600     wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
 601                 rect.x + rect.width <= M_BMPDATA->m_width &&
 602                 rect.y + rect.height <= M_BMPDATA->m_height,
 603                 ret, wxT("invalid bitmap region"));
 604
 605     if (HasPixbuf() || M_BMPDATA->m_bpp == 32)
 606     {
 607         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 608                                            gdk_pixbuf_get_has_alpha(GetPixbuf()),
 609                                            8, rect.width, rect.height);
 610         if (!pixbuf)
 611             return ret;
 612
 613         ret.SetPixbuf(pixbuf, M_BMPDATA->m_bpp);
 614         gdk_pixbuf_copy_area(GetPixbuf(),
 615                              rect.x, rect.y, rect.width, rect.height,
 616                              pixbuf, 0, 0);
 617     }
 618     else
 619     {
 620         ret.Create(rect.width, rect.height, M_BMPDATA->m_bpp);
 621         wxGtkObject<GdkGC> gc(gdk_gc_new( ret.GetPixmap() ));
 622         gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 623     }
 624     // make mask, unless there is already alpha
 625     if (GetMask() && !HasAlpha())
 626     {
 627         wxMask *mask = new wxMask;
 628         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 629
 630         wxGtkObject<GdkGC> gc(gdk_gc_new( mask->m_bitmap ));
 631         gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
 632
 633         ret.SetMask( mask );
 634     }
 635
 636     return ret;
 637 }
 638
 639 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 640 {
 641     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 642
 643 #if wxUSE_IMAGE
 644     // Try to save the bitmap via wxImage handlers:
 645     wxImage image = ConvertToImage();
 646     return image.Ok() && image.SaveFile(name, type);
 647 #else // !wxUSE_IMAGE
 648     wxUnusedVar(name);
 649     wxUnusedVar(type);
 650
 651     return false;
 652 #endif // wxUSE_IMAGE
 653 }
 654
 655 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 656 {
 657     UnRef();
 658
 659     if (type == wxBITMAP_TYPE_XPM)
 660     {
 661         GdkBitmap *mask = NULL;
 662         SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
 663         if (!M_BMPDATA)
 664             return false;   // do not set the mask
 665
 666         if (mask)
 667         {
 668             M_BMPDATA->m_mask = new wxMask;
 669             M_BMPDATA->m_mask->m_bitmap = mask;
 670         }
 671     }
 672 #if wxUSE_IMAGE
 673     else // try if wxImage can load it
 674     {
 675         wxImage image;
 676         if (image.LoadFile(name, type) && image.Ok())
 677             CreateFromImage(image, -1);
 678     }
 679 #endif // wxUSE_IMAGE
 680
 681     return IsOk();
 682 }
 683
 684 #if wxUSE_PALETTE
 685 wxPalette *wxBitmap::GetPalette() const
 686 {
 687     wxCHECK_MSG(IsOk(), NULL, wxT("invalid bitmap"));
 688
 689     return M_BMPDATA->m_palette;
 690 }
 691
 692 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 693 {
 694     // TODO
 695 }
 696 #endif // wxUSE_PALETTE
 697
 698 void wxBitmap::SetHeight( int height )
 699 {
 700     AllocExclusive();
 701     M_BMPDATA->m_height = height;
 702 }
 703
 704 void wxBitmap::SetWidth( int width )
 705 {
 706     AllocExclusive();
 707     M_BMPDATA->m_width = width;
 708 }
 709
 710 void wxBitmap::SetDepth( int depth )
 711 {
 712     AllocExclusive();
 713     M_BMPDATA->m_bpp = depth;
 714 }
 715
 716 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 717 {
 718     if (!pixmap)
 719         return;
 720
 721     if (!m_refData)
 722         m_refData = new wxBitmapRefData;
 723
 724     // AllocExclusive should not be needed for this internal function
 725     wxASSERT(m_refData->GetRefCount() == 1);
 726     wxASSERT(M_BMPDATA->m_pixmap == NULL);
 727     M_BMPDATA->m_pixmap = pixmap;
 728     gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
 729     M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
 730     PurgeOtherRepresentations(Pixmap);
 731 }
 732
 733 GdkPixmap *wxBitmap::GetPixmap() const
 734 {
 735     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 736
 737     // create the pixmap on the fly if we use Pixbuf representation:
 738     if (M_BMPDATA->m_pixmap == NULL)
 739     {
 740         GdkPixmap** pmask = NULL;
 741         if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
 742         {
 743             // make new mask from alpha
 744             delete M_BMPDATA->m_mask;
 745             M_BMPDATA->m_mask = new wxMask;
 746             pmask = &M_BMPDATA->m_mask->m_bitmap;
 747         }
 748         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
 749                                           &M_BMPDATA->m_pixmap,
 750                                           pmask,
 751                                           0x80 /* alpha threshold */);
 752     }
 753
 754     return M_BMPDATA->m_pixmap;
 755 }
 756
 757 bool wxBitmap::HasPixmap() const
 758 {
 759     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 760
 761     return M_BMPDATA->m_pixmap != NULL;
 762 }
 763
 764 GdkPixbuf *wxBitmap::GetPixbuf() const
 765 {
 766     wxCHECK_MSG( IsOk(), NULL, wxT("invalid bitmap") );
 767
 768     if (M_BMPDATA->m_pixbuf == NULL)
 769     {
 770
 771         int width = GetWidth();
 772         int height = GetHeight();
 773
 774         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 775                                            GetMask() != NULL,
 776                                            8, width, height);
 777         M_BMPDATA->m_pixbuf = pixbuf;
 778         gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
 779                                      0, 0, 0, 0, width, height);
 780         // apply the mask to created pixbuf:
 781         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
 782         {
 783             GdkPixbuf *pmask =
 784                 gdk_pixbuf_get_from_drawable(NULL,
 785                                              M_BMPDATA->m_mask->GetBitmap(),
 786                                              NULL,
 787                                              0, 0, 0, 0, width, height);
 788             if (pmask)
 789             {
 790                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
 791                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
 792                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 793                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
 794
 795                 for (int y = 0; y < height;
 796                      y++, bmp += bmprowinc, mask += maskrowinc)
 797                 {
 798                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
 799                     {
 800                         if (mask[0] == 0 /*black pixel*/)
 801                             bmp[3] = 0;
 802                     }
 803                 }
 804
 805                 g_object_unref (pmask);
 806             }
 807         }
 808     }
 809
 810     return M_BMPDATA->m_pixbuf;
 811 }
 812
 813 bool wxBitmap::HasPixbuf() const
 814 {
 815     wxCHECK_MSG( IsOk(), false, wxT("invalid bitmap") );
 816
 817     return M_BMPDATA->m_pixbuf != NULL;
 818 }
 819
 820 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf, int depth)
 821 {
 822     if (!pixbuf)
 823         return;
 824
 825     if (!m_refData)
 826         m_refData = new wxBitmapRefData;
 827
 828     // AllocExclusive should not be needed for this internal function
 829     wxASSERT(m_refData->GetRefCount() == 1);
 830     wxASSERT(M_BMPDATA->m_pixbuf == NULL);
 831     M_BMPDATA->m_pixbuf = pixbuf;
 832     M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
 833     M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
 834     // if depth specified
 835     if (depth != 0)
 836         M_BMPDATA->m_bpp = depth;
 837     else if (M_BMPDATA->m_bpp == 0)
 838         // use something reasonable
 839         M_BMPDATA->m_bpp = wxTheApp->GetGdkVisual()->depth;
 840     PurgeOtherRepresentations(Pixbuf);
 841 }
 842
 843 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 844 {
 845     if (keep == Pixmap && HasPixbuf())
 846     {
 847         g_object_unref (M_BMPDATA->m_pixbuf);
 848         M_BMPDATA->m_pixbuf = NULL;
 849     }
 850     if (keep == Pixbuf && HasPixmap())
 851     {
 852         g_object_unref (M_BMPDATA->m_pixmap);
 853         M_BMPDATA->m_pixmap = NULL;
 854     }
 855 }
 856
 857 #ifdef wxHAS_RAW_BITMAP
 858 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 859 {
 860     void* bits = NULL;
 861     GdkPixbuf *pixbuf = GetPixbuf();
 862     const bool hasAlpha = HasAlpha();
 863
 864     // allow access if bpp is valid and matches existence of alpha
 865     if ( pixbuf && ((bpp == 24 && !hasAlpha) || (bpp == 32 && hasAlpha)) )
 866     {
 867         data.m_height = gdk_pixbuf_get_height( pixbuf );
 868         data.m_width = gdk_pixbuf_get_width( pixbuf );
 869         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
 870         bits = gdk_pixbuf_get_pixels(pixbuf);
 871     }
 872     return bits;
 873 }
 874
 875 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 876 {
 877 }
 878 #endif // wxHAS_RAW_BITMAP
 879
 880 bool wxBitmap::HasAlpha() const
 881 {
 882     return m_refData != NULL && M_BMPDATA->m_pixbuf != NULL &&
 883         gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf);
 884 }
 885
 886 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 887 {
 888     return new wxBitmapRefData;
 889 }
 890
 891 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 892 {
 893     const wxBitmapRefData* oldRef = static_cast<const wxBitmapRefData*>(data);
 894     wxBitmapRefData* newRef = new wxBitmapRefData;
 895     newRef->m_width = oldRef->m_width;
 896     newRef->m_height = oldRef->m_height;
 897     newRef->m_bpp = oldRef->m_bpp;
 898     if (oldRef->m_pixmap != NULL)
 899     {
 900         newRef->m_pixmap = gdk_pixmap_new(
 901             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 902             // use pixmap depth, m_bpp may not match
 903             gdk_drawable_get_depth(oldRef->m_pixmap));
 904         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_pixmap));
 905         gdk_draw_drawable(
 906             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 907     }
 908     if (oldRef->m_pixbuf != NULL)
 909     {
 910         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 911     }
 912     if (oldRef->m_mask != NULL)
 913     {
 914         newRef->m_mask = new wxMask;
 915         newRef->m_mask->m_bitmap = gdk_pixmap_new(
 916             oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
 917         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_mask->m_bitmap));
 918         gdk_draw_drawable(newRef->m_mask->m_bitmap,
 919             gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
 920     }
 921 #if wxUSE_PALETTE
 922     // implement this if SetPalette is ever implemented
 923     wxASSERT(oldRef->m_palette == NULL);
 924 #endif
 925
 926     return newRef;
 927 }
 928
 929 /* static */ void wxBitmap::InitStandardHandlers()
 930 {
 931     // TODO: Insert handler based on GdkPixbufs handler later
 932 }