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 = (GdkBitmap *) NULL;
  45 }
  46
  47 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  48 {
  49     m_bitmap = (GdkBitmap *) NULL;
  50     Create( bitmap, colour );
  51 }
  52
  53 #if wxUSE_PALETTE
  54 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  55 {
  56     m_bitmap = (GdkBitmap *) NULL;
  57     Create( bitmap, paletteIndex );
  58 }
  59 #endif // wxUSE_PALETTE
  60
  61 wxMask::wxMask( const wxBitmap& bitmap )
  62 {
  63     m_bitmap = (GdkBitmap *) 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 = (GdkBitmap*) 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 = (GdkBitmap*) NULL;
 159     }
 160
 161     if (!bitmap.Ok()) 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 // wxBitmap
 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 = (GdkPixmap *) NULL;
 207     m_pixbuf = (GdkPixbuf *) NULL;
 208     m_mask = (wxMask *) NULL;
 209     m_width = 0;
 210     m_height = 0;
 211     m_bpp = 0;
 212 #if wxUSE_PALETTE
 213     m_palette = (wxPalette *) 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 #define M_BMPDATA wx_static_cast(wxBitmapRefData*, m_refData)
 232
 233 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 234
 235 wxBitmap::wxBitmap(int width, int height, int depth)
 236 {
 237     Create(width, height, depth);
 238 }
 239
 240 wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 241 {
 242     LoadFile(filename, type);
 243 }
 244
 245 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 246 {
 247     wxASSERT(depth == 1);
 248     if (width > 0 && height > 0 && depth == 1)
 249     {
 250         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 251
 252         wxASSERT_MSG( M_BMPDATA->m_pixmap, wxT("couldn't create bitmap") );
 253     }
 254 }
 255
 256 wxBitmap::wxBitmap(const char* const* bits)
 257 {
 258     wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
 259
 260     GdkBitmap* mask = NULL;
 261     SetPixmap(gdk_pixmap_create_from_xpm_d(wxGetRootWindow()->window, &mask, NULL, wx_const_cast(char**, bits)));
 262
 263     if (M_BMPDATA->m_pixmap != NULL && mask != NULL)
 264     {
 265         M_BMPDATA->m_mask = new wxMask;
 266         M_BMPDATA->m_mask->m_bitmap = mask;
 267     }
 268 }
 269
 270 wxBitmap::~wxBitmap()
 271 {
 272 }
 273
 274 bool wxBitmap::Create( int width, int height, int depth )
 275 {
 276     UnRef();
 277
 278     if ( width <= 0 || height <= 0 )
 279     {
 280         return false;
 281     }
 282
 283     if (depth == 32)
 284     {
 285         SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8, width, height), 32);
 286     }
 287     else
 288     {
 289         if (depth != 1)
 290         {
 291             const GdkVisual* visual = wxTheApp->GetGdkVisual();
 292             if (depth == -1)
 293                 depth = visual->depth;
 294
 295             wxCHECK_MSG(depth == visual->depth, false, wxT("invalid bitmap depth"));
 296         }
 297
 298         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 299     }
 300
 301     return Ok();
 302 }
 303
 304 wxBitmap wxBitmap::Rescale(int clipx, int clipy, int clipwidth, int clipheight,
 305                            int width, int height) const
 306 {
 307     wxBitmap bmp;
 308
 309     wxCHECK_MSG(Ok(), bmp, wxT("invalid bitmap"));
 310
 311     width = wxMax(width, 1);
 312     height = wxMax(height, 1);
 313
 314     const double scale_x = double(width) / clipwidth;
 315     const double scale_y = double(height) / clipheight;
 316
 317     // Converting to pixbuf, scaling with gdk_pixbuf_scale, and converting
 318     // back, is faster than scaling pixmap ourselves.
 319
 320     // use pixbuf if already available,
 321     // otherwise create temporary pixbuf from pixmap
 322     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 323     if (pixbuf)
 324         g_object_ref(pixbuf);
 325     else
 326         pixbuf = gdk_pixbuf_get_from_drawable(
 327             NULL, M_BMPDATA->m_pixmap, NULL,
 328             0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
 329
 330     // new pixbuf for scaled wxBitmap
 331     GdkPixbuf* pixbuf_scaled = gdk_pixbuf_new(
 332         GDK_COLORSPACE_RGB, gdk_pixbuf_get_has_alpha(pixbuf), 8, width, height);
 333
 334     // GDK_INTERP_NEAREST is the lowest-quality method for continuous-tone
 335     // images, but the only one which preserves sharp edges
 336     gdk_pixbuf_scale(
 337         pixbuf, pixbuf_scaled,
 338         0, 0, width, height, -clipx*scale_x, -clipy*scale_y, scale_x, scale_y,
 339         GDK_INTERP_NEAREST);
 340
 341     g_object_unref(pixbuf);
 342     bmp.SetPixbuf(pixbuf_scaled, M_BMPDATA->m_bpp);
 343
 344     if (M_BMPDATA->m_mask)
 345     {
 346         pixbuf = gdk_pixbuf_get_from_drawable(
 347             NULL, M_BMPDATA->m_mask->m_bitmap, NULL,
 348             0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
 349
 350         pixbuf_scaled = gdk_pixbuf_new(
 351             GDK_COLORSPACE_RGB, false, 8, width, height);
 352
 353         gdk_pixbuf_scale(
 354             pixbuf, pixbuf_scaled,
 355             0, 0, width, height, -clipx, -clipy, scale_x, scale_y,
 356             GDK_INTERP_NEAREST);
 357
 358         g_object_unref(pixbuf);
 359
 360         // use existing functionality to create mask from scaled pixbuf
 361         wxBitmap maskbmp;
 362         maskbmp.SetPixbuf(pixbuf_scaled);
 363         bmp.SetMask(new wxMask(maskbmp, *wxBLACK));
 364     }
 365     return bmp;
 366 }
 367
 368 #if wxUSE_IMAGE
 369
 370 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 371 {
 372     UnRef();
 373
 374     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 375     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 376
 377     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 378         return false;
 379
 380     // create pixbuf if image has alpha and requested depth is compatible
 381     if (image.HasAlpha() && (depth == -1 || depth == 32))
 382         return CreateFromImageAsPixbuf(image);
 383
 384     // otherwise create pixmap, if alpha is present it will be converted to mask
 385     return CreateFromImageAsPixmap(image, depth);
 386 }
 387
 388 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 389 {
 390     const int w = image.GetWidth();
 391     const int h = image.GetHeight();
 392     if (depth == 1)
 393     {
 394         // create XBM format bitmap
 395
 396         // one bit per pixel, each row starts on a byte boundary
 397         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 398         wxByte* out = new wxByte[out_size];
 399         // set bits are black
 400         memset(out, 0xff, out_size);
 401         const wxByte* in = image.GetData();
 402         unsigned bit_index = 0;
 403         for (int y = 0; y < h; y++)
 404         {
 405             for (int x = 0; x < w; x++, in += 3, bit_index++)
 406                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 407                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 408             // move index to next byte boundary
 409             bit_index = (bit_index + 7) & ~7u;
 410         }
 411         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 412         delete[] out;
 413     }
 414     else
 415     {
 416         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 417         wxGtkObject<GdkGC> gc(gdk_gc_new(M_BMPDATA->m_pixmap));
 418         gdk_draw_rgb_image(
 419             M_BMPDATA->m_pixmap, gc,
 420             0, 0, w, h,
 421             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 422     }
 423
 424     const wxByte* alpha = image.GetAlpha();
 425     if (alpha != NULL || image.HasMask())
 426     {
 427         // create mask as XBM format bitmap
 428
 429         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 430         wxByte* out = new wxByte[out_size];
 431         memset(out, 0xff, out_size);
 432         unsigned bit_index = 0;
 433         if (alpha != NULL)
 434         {
 435             for (int y = 0; y < h; y++)
 436             {
 437                 for (int x = 0; x < w; x++, bit_index++)
 438                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 439                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 440                 bit_index = (bit_index + 7) & ~7u;
 441             }
 442         }
 443         else
 444         {
 445             const wxByte r_mask = image.GetMaskRed();
 446             const wxByte g_mask = image.GetMaskGreen();
 447             const wxByte b_mask = image.GetMaskBlue();
 448             const wxByte* in = image.GetData();
 449             for (int y = 0; y < h; y++)
 450             {
 451                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 452                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 453                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 454                 bit_index = (bit_index + 7) & ~7u;
 455             }
 456         }
 457         wxMask* mask = new wxMask;
 458         mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
 459         SetMask(mask);
 460         delete[] out;
 461     }
 462     return true;
 463 }
 464
 465 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 466 {
 467     wxASSERT(image.HasAlpha());
 468
 469     int width = image.GetWidth();
 470     int height = image.GetHeight();
 471
 472     Create(width, height, 32);
 473     GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
 474     if (!pixbuf)
 475         return false;
 476
 477     // Copy the data:
 478     const unsigned char* in = image.GetData();
 479     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 480     unsigned char *alpha = image.GetAlpha();
 481
 482     int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 483
 484     for (int y = 0; y < height; y++, out += rowpad)
 485     {
 486         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 487         {
 488             out[0] = in[0];
 489             out[1] = in[1];
 490             out[2] = in[2];
 491             out[3] = *alpha;
 492         }
 493     }
 494
 495     return true;
 496 }
 497
 498 wxImage wxBitmap::ConvertToImage() const
 499 {
 500     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 501
 502     const int w = GetWidth();
 503     const int h = GetHeight();
 504     wxImage image(w, h, false);
 505     unsigned char *data = image.GetData();
 506
 507     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 508
 509     // prefer pixbuf if available, it will preserve alpha and should be quicker
 510     if (HasPixbuf())
 511     {
 512         GdkPixbuf *pixbuf = GetPixbuf();
 513         unsigned char* alpha = NULL;
 514         if (gdk_pixbuf_get_has_alpha(pixbuf))
 515         {
 516             image.SetAlpha();
 517             alpha = image.GetAlpha();
 518         }
 519         const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
 520         unsigned char *out = data;
 521         const int inc = 3 + int(alpha != NULL);
 522         const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 523
 524         for (int y = 0; y < h; y++, in += rowpad)
 525         {
 526             for (int x = 0; x < w; x++, in += inc, out += 3)
 527             {
 528                 out[0] = in[0];
 529                 out[1] = in[1];
 530                 out[2] = in[2];
 531                 if (alpha != NULL)
 532                     *alpha++ = in[3];
 533             }
 534         }
 535     }
 536     else
 537     {
 538         GdkPixmap* pixmap = GetPixmap();
 539         GdkPixmap* pixmap_invert = NULL;
 540         if (GetDepth() == 1)
 541         {
 542             // mono bitmaps are inverted, i.e. 0 is white
 543             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 544             wxGtkObject<GdkGC> gc(gdk_gc_new(pixmap_invert));
 545             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 546             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 547             pixmap = pixmap_invert;
 548         }
 549         // create a pixbuf which shares data with the wxImage
 550         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 551             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 552
 553         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 554
 555         g_object_unref(pixbuf);
 556         if (pixmap_invert != NULL)
 557             g_object_unref(pixmap_invert);
 558     }
 559     // convert mask, unless there is already alpha
 560     if (GetMask() && !image.HasAlpha())
 561     {
 562         // we hard code the mask colour for now but we could also make an
 563         // effort (and waste time) to choose a colour not present in the
 564         // image already to avoid having to fudge the pixels below --
 565         // whether it's worth to do it is unclear however
 566         const int MASK_RED = 1;
 567         const int MASK_GREEN = 2;
 568         const int MASK_BLUE = 3;
 569         const int MASK_BLUE_REPLACEMENT = 2;
 570
 571         image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 572         GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 573
 574         for (int y = 0; y < h; y++)
 575         {
 576             for (int x = 0; x < w; x++, data += 3)
 577             {
 578                 if (gdk_image_get_pixel(image_mask, x, y) == 0)
 579                 {
 580                     data[0] = MASK_RED;
 581                     data[1] = MASK_GREEN;
 582                     data[2] = MASK_BLUE;
 583                 }
 584                 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 585                 {
 586                     // we have to fudge the colour a bit to prevent
 587                     // this pixel from appearing transparent
 588                     data[2] = MASK_BLUE_REPLACEMENT;
 589                 }
 590             }
 591         }
 592         g_object_unref(image_mask);
 593     }
 594
 595     return image;
 596 }
 597
 598 #endif // wxUSE_IMAGE
 599
 600 int wxBitmap::GetHeight() const
 601 {
 602     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 603
 604     return M_BMPDATA->m_height;
 605 }
 606
 607 int wxBitmap::GetWidth() const
 608 {
 609     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 610
 611     return M_BMPDATA->m_width;
 612 }
 613
 614 int wxBitmap::GetDepth() const
 615 {
 616     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 617
 618     return M_BMPDATA->m_bpp;
 619 }
 620
 621 wxMask *wxBitmap::GetMask() const
 622 {
 623     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 624
 625     return M_BMPDATA->m_mask;
 626 }
 627
 628 void wxBitmap::SetMask( wxMask *mask )
 629 {
 630     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 631
 632     AllocExclusive();
 633     delete M_BMPDATA->m_mask;
 634     M_BMPDATA->m_mask = mask;
 635 }
 636
 637 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 638 {
 639     *this = icon;
 640     return Ok();
 641 }
 642
 643 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 644 {
 645     wxBitmap ret;
 646
 647     wxCHECK_MSG(Ok(), ret, wxT("invalid bitmap"));
 648     wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
 649                 rect.x + rect.width <= M_BMPDATA->m_width &&
 650                 rect.y + rect.height <= M_BMPDATA->m_height,
 651                 ret, wxT("invalid bitmap region"));
 652
 653     if (HasPixbuf() || M_BMPDATA->m_bpp == 32)
 654     {
 655         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 656                                            gdk_pixbuf_get_has_alpha(GetPixbuf()),
 657                                            8, rect.width, rect.height);
 658         ret.SetPixbuf(pixbuf, M_BMPDATA->m_bpp);
 659         gdk_pixbuf_copy_area(GetPixbuf(),
 660                              rect.x, rect.y, rect.width, rect.height,
 661                              pixbuf, 0, 0);
 662     }
 663     else
 664     {
 665         ret.Create(rect.width, rect.height, M_BMPDATA->m_bpp);
 666         wxGtkObject<GdkGC> gc(gdk_gc_new( ret.GetPixmap() ));
 667         gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 668     }
 669     // make mask, unless there is already alpha
 670     if (GetMask() && !HasAlpha())
 671     {
 672         wxMask *mask = new wxMask;
 673         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 674
 675         wxGtkObject<GdkGC> gc(gdk_gc_new( mask->m_bitmap ));
 676         gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
 677
 678         ret.SetMask( mask );
 679     }
 680
 681     return ret;
 682 }
 683
 684 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 685 {
 686     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 687
 688 #if wxUSE_IMAGE
 689     // Try to save the bitmap via wxImage handlers:
 690     wxImage image = ConvertToImage();
 691     return image.Ok() && image.SaveFile(name, type);
 692 #else // !wxUSE_IMAGE
 693     wxUnusedVar(name);
 694     wxUnusedVar(type);
 695
 696     return false;
 697 #endif // wxUSE_IMAGE
 698 }
 699
 700 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 701 {
 702     UnRef();
 703
 704     if (type == wxBITMAP_TYPE_XPM)
 705     {
 706         GdkBitmap *mask = (GdkBitmap*) NULL;
 707         SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
 708
 709         if (mask)
 710         {
 711             M_BMPDATA->m_mask = new wxMask;
 712             M_BMPDATA->m_mask->m_bitmap = mask;
 713         }
 714     }
 715 #if wxUSE_IMAGE
 716     else // try if wxImage can load it
 717     {
 718         wxImage image;
 719         if (image.LoadFile(name, type) && image.Ok())
 720             CreateFromImage(image, -1);
 721     }
 722 #endif // wxUSE_IMAGE
 723
 724     return Ok();
 725 }
 726
 727 #if wxUSE_PALETTE
 728 wxPalette *wxBitmap::GetPalette() const
 729 {
 730     wxCHECK_MSG(Ok(), NULL, wxT("invalid bitmap"));
 731
 732     return M_BMPDATA->m_palette;
 733 }
 734
 735 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 736 {
 737     // TODO
 738 }
 739 #endif // wxUSE_PALETTE
 740
 741 void wxBitmap::SetHeight( int height )
 742 {
 743     AllocExclusive();
 744     M_BMPDATA->m_height = height;
 745 }
 746
 747 void wxBitmap::SetWidth( int width )
 748 {
 749     AllocExclusive();
 750     M_BMPDATA->m_width = width;
 751 }
 752
 753 void wxBitmap::SetDepth( int depth )
 754 {
 755     AllocExclusive();
 756     M_BMPDATA->m_bpp = depth;
 757 }
 758
 759 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 760 {
 761     if (!m_refData)
 762         m_refData = new wxBitmapRefData;
 763
 764     // AllocExclusive should not be needed for this internal function
 765     wxASSERT(m_refData->GetRefCount() == 1);
 766     wxASSERT(M_BMPDATA->m_pixmap == NULL);
 767     M_BMPDATA->m_pixmap = pixmap;
 768     gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
 769     M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
 770     PurgeOtherRepresentations(Pixmap);
 771 }
 772
 773 GdkPixmap *wxBitmap::GetPixmap() const
 774 {
 775     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
 776
 777     // create the pixmap on the fly if we use Pixbuf representation:
 778     if (M_BMPDATA->m_pixmap == NULL)
 779     {
 780         GdkPixmap** pmask = NULL;
 781         if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
 782         {
 783             // make new mask from alpha
 784             delete M_BMPDATA->m_mask;
 785             M_BMPDATA->m_mask = new wxMask;
 786             pmask = &M_BMPDATA->m_mask->m_bitmap;
 787         }
 788         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
 789                                           &M_BMPDATA->m_pixmap,
 790                                           pmask,
 791                                           0x80 /* alpha threshold */);
 792     }
 793
 794     return M_BMPDATA->m_pixmap;
 795 }
 796
 797 bool wxBitmap::HasPixmap() const
 798 {
 799     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 800
 801     return M_BMPDATA->m_pixmap != NULL;
 802 }
 803
 804 GdkPixbuf *wxBitmap::GetPixbuf() const
 805 {
 806     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 807
 808     if (M_BMPDATA->m_pixbuf == NULL)
 809     {
 810         int width = GetWidth();
 811         int height = GetHeight();
 812
 813         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 814                                            GetMask() != NULL,
 815                                            8, width, height);
 816         M_BMPDATA->m_pixbuf = pixbuf;
 817         gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
 818                                      0, 0, 0, 0, width, height);
 819
 820         // apply the mask to created pixbuf:
 821         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
 822         {
 823             GdkPixbuf *pmask =
 824                 gdk_pixbuf_get_from_drawable(NULL,
 825                                              M_BMPDATA->m_mask->GetBitmap(),
 826                                              NULL,
 827                                              0, 0, 0, 0, width, height);
 828             if (pmask)
 829             {
 830                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
 831                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
 832                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 833                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
 834
 835                 for (int y = 0; y < height;
 836                      y++, bmp += bmprowinc, mask += maskrowinc)
 837                 {
 838                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
 839                     {
 840                         if (mask[0] == 0 /*black pixel*/)
 841                             bmp[3] = 0;
 842                     }
 843                 }
 844
 845                 g_object_unref (pmask);
 846             }
 847         }
 848     }
 849
 850     return M_BMPDATA->m_pixbuf;
 851 }
 852
 853 bool wxBitmap::HasPixbuf() const
 854 {
 855     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 856
 857     return M_BMPDATA->m_pixbuf != NULL;
 858 }
 859
 860 void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf, int depth)
 861 {
 862     if (!m_refData)
 863         m_refData = new wxBitmapRefData;
 864
 865     // AllocExclusive should not be needed for this internal function
 866     wxASSERT(m_refData->GetRefCount() == 1);
 867     wxASSERT(M_BMPDATA->m_pixbuf == NULL);
 868     M_BMPDATA->m_pixbuf = pixbuf;
 869     M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
 870     M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
 871     // if depth specified
 872     if (depth != 0)
 873         M_BMPDATA->m_bpp = depth;
 874     else if (M_BMPDATA->m_bpp == 0)
 875         // use something reasonable
 876         M_BMPDATA->m_bpp = wxTheApp->GetGdkVisual()->depth;
 877     PurgeOtherRepresentations(Pixbuf);
 878 }
 879
 880 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
 881 {
 882     if (keep == Pixmap && HasPixbuf())
 883     {
 884         g_object_unref (M_BMPDATA->m_pixbuf);
 885         M_BMPDATA->m_pixbuf = NULL;
 886     }
 887     if (keep == Pixbuf && HasPixmap())
 888     {
 889         g_object_unref (M_BMPDATA->m_pixmap);
 890         M_BMPDATA->m_pixmap = NULL;
 891     }
 892 }
 893
 894 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
 895 {
 896     void* bits = NULL;
 897     GdkPixbuf *pixbuf = GetPixbuf();
 898     const bool hasAlpha = HasAlpha();
 899     // allow access if bpp is valid and matches existence of alpha
 900     if ( pixbuf && ((bpp == 24 && !hasAlpha) || (bpp == 32 && hasAlpha)) )
 901     {
 902         data.m_height = gdk_pixbuf_get_height( pixbuf );
 903         data.m_width = gdk_pixbuf_get_width( pixbuf );
 904         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
 905         bits = gdk_pixbuf_get_pixels(pixbuf);
 906     }
 907     return bits;
 908 }
 909
 910 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 911 {
 912 }
 913
 914 bool wxBitmap::HasAlpha() const
 915 {
 916     return m_refData != NULL && M_BMPDATA->m_pixbuf != NULL &&
 917         gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf);
 918 }
 919
 920 wxGDIRefData* wxBitmap::CreateGDIRefData() const
 921 {
 922     return new wxBitmapRefData;
 923 }
 924
 925 wxGDIRefData* wxBitmap::CloneGDIRefData(const wxGDIRefData* data) const
 926 {
 927     const wxBitmapRefData* oldRef = wx_static_cast(const wxBitmapRefData*, data);
 928     wxBitmapRefData* newRef = new wxBitmapRefData;
 929     newRef->m_width = oldRef->m_width;
 930     newRef->m_height = oldRef->m_height;
 931     newRef->m_bpp = oldRef->m_bpp;
 932     if (oldRef->m_pixmap != NULL)
 933     {
 934         newRef->m_pixmap = gdk_pixmap_new(
 935             oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
 936             // use pixmap depth, m_bpp may not match
 937             gdk_drawable_get_depth(oldRef->m_pixmap));
 938         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_pixmap));
 939         gdk_draw_drawable(
 940             newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
 941     }
 942     if (oldRef->m_pixbuf != NULL)
 943     {
 944         newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
 945     }
 946     if (oldRef->m_mask != NULL)
 947     {
 948         newRef->m_mask = new wxMask;
 949         newRef->m_mask->m_bitmap = gdk_pixmap_new(
 950             oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
 951         wxGtkObject<GdkGC> gc(gdk_gc_new(newRef->m_mask->m_bitmap));
 952         gdk_draw_drawable(newRef->m_mask->m_bitmap,
 953             gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
 954     }
 955 #if wxUSE_PALETTE
 956     // implement this if SetPalette is ever implemented
 957     wxASSERT(oldRef->m_palette == NULL);
 958 #endif
 959
 960     return newRef;
 961 }
 962
 963 /* static */ void wxBitmap::InitStandardHandlers()
 964 {
 965     // TODO: Insert handler based on GdkPixbufs handler later
 966 }