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 <gtk/gtk.h>
  27
  28 //-----------------------------------------------------------------------------
  29 // data
  30 //-----------------------------------------------------------------------------
  31
  32 extern GtkWidget *wxGetRootWindow();
  33
  34 //-----------------------------------------------------------------------------
  35 // wxMask
  36 //-----------------------------------------------------------------------------
  37
  38 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  39
  40 wxMask::wxMask()
  41 {
  42     m_bitmap = (GdkBitmap *) NULL;
  43 }
  44
  45 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  46 {
  47     m_bitmap = (GdkBitmap *) NULL;
  48     Create( bitmap, colour );
  49 }
  50
  51 #if wxUSE_PALETTE
  52 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  53 {
  54     m_bitmap = (GdkBitmap *) NULL;
  55     Create( bitmap, paletteIndex );
  56 }
  57 #endif // wxUSE_PALETTE
  58
  59 wxMask::wxMask( const wxBitmap& bitmap )
  60 {
  61     m_bitmap = (GdkBitmap *) NULL;
  62     Create( bitmap );
  63 }
  64
  65 wxMask::~wxMask()
  66 {
  67     if (m_bitmap)
  68         g_object_unref (m_bitmap);
  69 }
  70
  71 bool wxMask::Create( const wxBitmap& bitmap,
  72                      const wxColour& colour )
  73 {
  74     if (m_bitmap)
  75     {
  76         g_object_unref (m_bitmap);
  77         m_bitmap = (GdkBitmap*) NULL;
  78     }
  79
  80     const int w = bitmap.GetWidth();
  81     const int h = bitmap.GetHeight();
  82
  83     // create mask as XBM format bitmap
  84
  85     // one bit per pixel, each row starts on a byte boundary
  86     const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
  87     wxByte* out = new wxByte[out_size];
  88     // set bits are unmasked
  89     memset(out, 0xff, out_size);
  90     unsigned bit_index = 0;
  91     if (bitmap.HasPixbuf())
  92     {
  93         const wxByte r_mask = colour.Red();
  94         const wxByte g_mask = colour.Green();
  95         const wxByte b_mask = colour.Blue();
  96         GdkPixbuf* pixbuf = bitmap.GetPixbuf();
  97         const wxByte* in = gdk_pixbuf_get_pixels(pixbuf);
  98         const int inc = 3 + int(gdk_pixbuf_get_has_alpha(pixbuf) != 0);
  99         const int rowpadding = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 100         for (int y = 0; y < h; y++, in += rowpadding)
 101         {
 102             for (int x = 0; x < w; x++, in += inc, bit_index++)
 103                 if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 104                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 105             // move index to next byte boundary
 106             bit_index = (bit_index + 7) & ~7u;
 107         }
 108     }
 109     else
 110     {
 111         GdkImage* image = gdk_drawable_get_image(bitmap.GetPixmap(), 0, 0, w, h);
 112         GdkColormap* colormap = gdk_image_get_colormap(image);
 113         guint32 mask_pixel;
 114         if (colormap == NULL)
 115             // mono bitmap, white is pixel value 0
 116             mask_pixel = guint32(colour.Red() != 255 || colour.Green() != 255 || colour.Blue() != 255);
 117         else
 118         {
 119             wxColor c(colour);
 120             c.CalcPixel(colormap);
 121             mask_pixel = c.GetPixel();
 122         }
 123         for (int y = 0; y < h; y++)
 124         {
 125             for (int x = 0; x < w; x++, bit_index++)
 126                 if (gdk_image_get_pixel(image, x, y) == mask_pixel)
 127                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 128             bit_index = (bit_index + 7) & ~7u;
 129         }
 130         g_object_unref(image);
 131     }
 132     m_bitmap = gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h);
 133     delete[] out;
 134     return true;
 135 }
 136
 137 #if wxUSE_PALETTE
 138 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 139 {
 140     unsigned char r,g,b;
 141     wxPalette *pal = bitmap.GetPalette();
 142
 143     wxCHECK_MSG( pal, false, wxT("Cannot create mask from bitmap without palette") );
 144
 145     pal->GetRGB(paletteIndex, &r, &g, &b);
 146
 147     return Create(bitmap, wxColour(r, g, b));
 148 }
 149 #endif // wxUSE_PALETTE
 150
 151 bool wxMask::Create( const wxBitmap& bitmap )
 152 {
 153     if (m_bitmap)
 154     {
 155         g_object_unref (m_bitmap);
 156         m_bitmap = (GdkBitmap*) NULL;
 157     }
 158
 159     if (!bitmap.Ok()) return false;
 160
 161     wxCHECK_MSG( bitmap.GetDepth() == 1, false, wxT("Cannot create mask from colour bitmap") );
 162
 163     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 164
 165     if (!m_bitmap) return false;
 166
 167     GdkGC *gc = gdk_gc_new( m_bitmap );
 168     gdk_gc_set_function(gc, GDK_COPY_INVERT);
 169     gdk_draw_drawable(m_bitmap, gc, bitmap.GetPixmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight());
 170     g_object_unref (gc);
 171
 172     return true;
 173 }
 174
 175 GdkBitmap *wxMask::GetBitmap() const
 176 {
 177     return m_bitmap;
 178 }
 179
 180 //-----------------------------------------------------------------------------
 181 // wxBitmap
 182 //-----------------------------------------------------------------------------
 183
 184 class wxBitmapRefData: public wxObjectRefData
 185 {
 186 public:
 187     wxBitmapRefData();
 188     virtual ~wxBitmapRefData();
 189
 190     GdkPixmap      *m_pixmap;
 191     GdkPixbuf      *m_pixbuf;
 192     wxMask         *m_mask;
 193     int             m_width;
 194     int             m_height;
 195     int             m_bpp;
 196     wxPalette      *m_palette;
 197 };
 198
 199 wxBitmapRefData::wxBitmapRefData()
 200 {
 201     m_pixmap = (GdkPixmap *) NULL;
 202     m_pixbuf = (GdkPixbuf *) NULL;
 203     m_mask = (wxMask *) NULL;
 204     m_width = 0;
 205     m_height = 0;
 206     m_bpp = 0;
 207     m_palette = (wxPalette *) NULL;
 208 }
 209
 210 wxBitmapRefData::~wxBitmapRefData()
 211 {
 212     if (m_pixmap)
 213         g_object_unref (m_pixmap);
 214     if (m_pixbuf)
 215         g_object_unref (m_pixbuf);
 216     delete m_mask;
 217 #if wxUSE_PALETTE
 218     delete m_palette;
 219 #endif // wxUSE_PALETTE
 220 }
 221
 222 //-----------------------------------------------------------------------------
 223
 224 #define M_BMPDATA wx_static_cast(wxBitmapRefData*, m_refData)
 225
 226 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 227
 228 wxBitmap::wxBitmap()
 229 {
 230 }
 231
 232 wxBitmap::wxBitmap( int width, int height, int depth )
 233 {
 234     Create( width, height, depth );
 235 }
 236
 237 bool wxBitmap::Create( int width, int height, int depth )
 238 {
 239     UnRef();
 240
 241     if ( width <= 0 || height <= 0 )
 242     {
 243         return false;
 244     }
 245
 246     if (depth == 32)
 247     {
 248         SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8, width, height));
 249         M_BMPDATA->m_bpp = 32;
 250     }
 251     else
 252     {
 253         if (depth != 1)
 254         {
 255             const GdkVisual* visual = wxTheApp->GetGdkVisual();
 256             if (depth == -1)
 257                 depth = visual->depth;
 258
 259             wxCHECK_MSG(depth == visual->depth, false, wxT("invalid bitmap depth"));
 260         }
 261
 262         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
 263     }
 264
 265     return Ok();
 266 }
 267
 268 bool wxBitmap::CreateFromXpm( const char **bits )
 269 {
 270     UnRef();
 271
 272     wxCHECK_MSG( bits != NULL, false, wxT("invalid bitmap data") );
 273
 274     GdkBitmap *mask = (GdkBitmap*) NULL;
 275     SetPixmap(gdk_pixmap_create_from_xpm_d(wxGetRootWindow()->window, &mask, NULL, (gchar**)bits));
 276
 277     wxCHECK_MSG( M_BMPDATA->m_pixmap, false, wxT("couldn't create pixmap") );
 278
 279     if (mask)
 280     {
 281         M_BMPDATA->m_mask = new wxMask;
 282         M_BMPDATA->m_mask->m_bitmap = mask;
 283     }
 284
 285     return true;
 286 }
 287
 288 wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
 289 {
 290     wxBitmap bmp;
 291
 292     wxCHECK_MSG(Ok(), bmp, wxT("invalid bitmap"));
 293
 294     if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 295         return *this;
 296
 297     int width = wxMax(newx, 1);
 298     int height = wxMax(newy, 1);
 299     width = wxMin(width, clipwidth);
 300     height = wxMin(height, clipheight);
 301
 302     // scale pixbuf if available and it has alpha or there is no mask
 303     if (M_BMPDATA->m_pixbuf != NULL && (
 304         M_BMPDATA->m_mask == NULL || gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf)))
 305     {
 306         bmp.SetDepth(GetDepth());
 307         bmp.SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 308                                      gdk_pixbuf_get_has_alpha(GetPixbuf()),
 309                                      8, width, height));
 310         gdk_pixbuf_scale(GetPixbuf(), bmp.GetPixbuf(),
 311                          0, 0, width, height,
 312                          clipx, clipy,
 313                          (double)newx/GetWidth(), (double)newy/GetHeight(),
 314                          GDK_INTERP_BILINEAR);
 315     }
 316     else
 317     {
 318         GdkImage* img = gdk_drawable_get_image(GetPixmap(), 0, 0, GetWidth(), GetHeight());
 319
 320         wxCHECK_MSG(img, bmp, wxT("couldn't create image"));
 321
 322         GdkGC *gc = NULL;
 323         GdkPixmap *dstpix = NULL;
 324         char *dst = NULL;
 325         long dstbyteperline = 0;
 326
 327         if (GetDepth() != 1)
 328         {
 329             GdkVisual *visual = gdk_drawable_get_visual( GetPixmap() );
 330             if (visual == NULL)
 331                 visual = wxTheApp->GetGdkVisual();
 332
 333             bmp = wxBitmap(width, height, visual->depth);
 334             dstpix = bmp.GetPixmap();
 335             gc = gdk_gc_new( dstpix );
 336         }
 337         else
 338         {
 339             dstbyteperline = (width + 7) / 8;
 340             dst = (char*) malloc(dstbyteperline*height);
 341         }
 342
 343         // be careful to use the right scaling factor
 344         float scx = (float)M_BMPDATA->m_width/(float)newx;
 345         float scy = (float)M_BMPDATA->m_height/(float)newy;
 346         // prepare accel-tables
 347         int *tablex = (int *)calloc(width,sizeof(int));
 348         int *tabley = (int *)calloc(height,sizeof(int));
 349
 350         // accel table filled with clipped values
 351         for (int x = 0; x < width; x++)
 352             tablex[x] = (int) (scx * (x+clipx));
 353         for (int y = 0; y < height; y++)
 354             tabley[y] = (int) (scy * (y+clipy));
 355
 356         // Main rescaling routine starts here
 357         for (int h = 0; h < height; h++)
 358         {
 359             char outbyte = 0;
 360             int old_x = -1;
 361             guint32 old_pixval = 0;
 362
 363             for (int w = 0; w < width; w++)
 364             {
 365                 guint32 pixval;
 366                 int x = tablex[w];
 367                 if (x == old_x)
 368                     pixval = old_pixval;
 369                 else
 370                 {
 371                     pixval = gdk_image_get_pixel( img, x, tabley[h] );
 372                     old_pixval = pixval;
 373                     old_x = x;
 374                 }
 375
 376                 if ( dst )
 377                 {
 378                     if (pixval)
 379                     {
 380                         char bit=1;
 381                         char shift = bit << (w % 8);
 382                         outbyte |= shift;
 383                     }
 384
 385                     if ((w+1)%8==0)
 386                     {
 387                         dst[h*dstbyteperline+w/8] = outbyte;
 388                         outbyte = 0;
 389                     }
 390                 }
 391                 else
 392                 {
 393                     GdkColor col;
 394                     col.pixel = pixval;
 395                     gdk_gc_set_foreground( gc, &col );
 396                     gdk_draw_point( dstpix, gc, w, h);
 397                 }
 398             }
 399
 400             // do not forget the last byte
 401             if ( dst && (width % 8 != 0) )
 402                 dst[h*dstbyteperline+width/8] = outbyte;
 403         }
 404
 405         g_object_unref (img);
 406         if (gc) g_object_unref (gc);
 407
 408         if ( dst )
 409         {
 410             bmp = wxBitmap( (const char *)dst, width, height, 1 );
 411             free( dst );
 412         }
 413
 414         if (GetMask())
 415         {
 416             dstbyteperline = (width + 7) / 8;
 417             dst = (char*) malloc(dstbyteperline*height);
 418             img = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight());
 419
 420             for (int h = 0; h < height; h++)
 421             {
 422                 char outbyte = 0;
 423                 int old_x = -1;
 424                 guint32 old_pixval = 0;
 425
 426                 for (int w = 0; w < width; w++)
 427                 {
 428                     guint32 pixval;
 429                     int x = tablex[w];
 430                     if (x == old_x)
 431                         pixval = old_pixval;
 432                     else
 433                     {
 434                         pixval = gdk_image_get_pixel( img, x, tabley[h] );
 435                         old_pixval = pixval;
 436                         old_x = x;
 437                     }
 438
 439                     if (pixval)
 440                     {
 441                         char bit=1;
 442                         char shift = bit << (w % 8);
 443                         outbyte |= shift;
 444                     }
 445
 446                     if ((w+1)%8 == 0)
 447                     {
 448                         dst[h*dstbyteperline+w/8] = outbyte;
 449                         outbyte = 0;
 450                     }
 451                 }
 452
 453                 // do not forget the last byte
 454                 if (width % 8 != 0)
 455                     dst[h*dstbyteperline+width/8] = outbyte;
 456             }
 457             wxMask* mask = new wxMask;
 458             mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
 459             bmp.SetMask(mask);
 460
 461             free( dst );
 462             g_object_unref (img);
 463         }
 464
 465         free( tablex );
 466         free( tabley );
 467     }
 468
 469     return bmp;
 470 }
 471
 472 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 473 {
 474     UnRef();
 475
 476     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 477     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 478
 479     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 480         return false;
 481
 482     // create pixbuf if image has alpha and requested depth is compatible
 483     if (image.HasAlpha() && (depth == -1 || depth == 32))
 484         return CreateFromImageAsPixbuf(image);
 485
 486     // otherwise create pixmap, if alpha is present it will be converted to mask
 487     return CreateFromImageAsPixmap(image, depth);
 488 }
 489
 490 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 491 {
 492     const int w = image.GetWidth();
 493     const int h = image.GetHeight();
 494     if (depth == 1)
 495     {
 496         // create XBM format bitmap
 497
 498         // one bit per pixel, each row starts on a byte boundary
 499         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 500         wxByte* out = new wxByte[out_size];
 501         // set bits are black
 502         memset(out, 0xff, out_size);
 503         const wxByte* in = image.GetData();
 504         unsigned bit_index = 0;
 505         for (int y = 0; y < h; y++)
 506         {
 507             for (int x = 0; x < w; x++, in += 3, bit_index++)
 508                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 509                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 510             // move index to next byte boundary
 511             bit_index = (bit_index + 7) & ~7u;
 512         }
 513         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 514         delete[] out;
 515     }
 516     else
 517     {
 518         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 519         GdkGC* gc = gdk_gc_new(M_BMPDATA->m_pixmap);
 520         gdk_draw_rgb_image(
 521             M_BMPDATA->m_pixmap, gc,
 522             0, 0, w, h,
 523             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 524         g_object_unref(gc);
 525     }
 526
 527     const wxByte* alpha = image.GetAlpha();
 528     if (alpha != NULL || image.HasMask())
 529     {
 530         // create mask as XBM format bitmap
 531
 532         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 533         wxByte* out = new wxByte[out_size];
 534         memset(out, 0xff, out_size);
 535         unsigned bit_index = 0;
 536         if (alpha != NULL)
 537         {
 538             for (int y = 0; y < h; y++)
 539             {
 540                 for (int x = 0; x < w; x++, bit_index++)
 541                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 542                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 543                 bit_index = (bit_index + 7) & ~7u;
 544             }
 545         }
 546         else
 547         {
 548             const wxByte r_mask = image.GetMaskRed();
 549             const wxByte g_mask = image.GetMaskGreen();
 550             const wxByte b_mask = image.GetMaskBlue();
 551             const wxByte* in = image.GetData();
 552             for (int y = 0; y < h; y++)
 553             {
 554                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 555                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 556                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 557                 bit_index = (bit_index + 7) & ~7u;
 558             }
 559         }
 560         wxMask* mask = new wxMask;
 561         mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
 562         SetMask(mask);
 563         delete[] out;
 564     }
 565     return true;
 566 }
 567
 568 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 569 {
 570     wxASSERT(image.HasAlpha());
 571
 572     int width = image.GetWidth();
 573     int height = image.GetHeight();
 574
 575     GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 576                                        true,
 577                                        8 /* bits per sample */,
 578                                        width, height);
 579     if (!pixbuf)
 580         return false;
 581
 582     SetDepth(32);
 583     SetPixbuf(pixbuf);
 584
 585     // Copy the data:
 586     unsigned char *in = image.GetData();
 587     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 588     unsigned char *alpha = image.GetAlpha();
 589
 590     int rowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 591
 592     for (int y = 0; y < height; y++, out += rowinc)
 593     {
 594         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 595         {
 596             out[0] = in[0];
 597             out[1] = in[1];
 598             out[2] = in[2];
 599             out[3] = *alpha;
 600         }
 601     }
 602
 603     return true;
 604 }
 605
 606 wxImage wxBitmap::ConvertToImage() const
 607 {
 608     wxImage image;
 609
 610     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 611
 612     const int w = GetWidth();
 613     const int h = GetHeight();
 614     image.Create(w, h);
 615     unsigned char *data = image.GetData();
 616
 617     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 618
 619     // prefer pixbuf if available, it will preserve alpha and should be quicker
 620     if (HasPixbuf())
 621     {
 622         GdkPixbuf *pixbuf = GetPixbuf();
 623         unsigned char* alpha = NULL;
 624         if (gdk_pixbuf_get_has_alpha(pixbuf))
 625         {
 626             image.SetAlpha();
 627             alpha = image.GetAlpha();
 628         }
 629         unsigned char *in = gdk_pixbuf_get_pixels(pixbuf);
 630         unsigned char *out = data;
 631         const int inc = 3 + int(alpha != NULL);
 632         const int rowinc = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
 633
 634         for (int y = 0; y < h; y++, in += rowinc)
 635         {
 636             for (int x = 0; x < w; x++, in += inc, out += 3)
 637             {
 638                 out[0] = in[0];
 639                 out[1] = in[1];
 640                 out[2] = in[2];
 641                 if (alpha != NULL)
 642                     *alpha++ = in[3];
 643             }
 644         }
 645     }
 646     else
 647     {
 648         GdkPixmap* pixmap = GetPixmap();
 649         GdkPixmap* pixmap_invert = NULL;
 650         if (GetDepth() == 1)
 651         {
 652             // mono bitmaps are inverted, i.e. 0 is white
 653             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 654             GdkGC* gc = gdk_gc_new(pixmap_invert);
 655             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 656             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 657             g_object_unref(gc);
 658             pixmap = pixmap_invert;
 659         }
 660         // create a pixbuf which shares data with the wxImage
 661         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 662             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 663
 664         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 665
 666         g_object_unref(pixbuf);
 667         if (pixmap_invert != NULL)
 668             g_object_unref(pixmap_invert);
 669     }
 670     // convert mask, unless there is already alpha
 671     if (GetMask() && !image.HasAlpha())
 672     {
 673         // the colour used as transparent one in wxImage and the one it is
 674         // replaced with when it really occurs in the bitmap
 675         const int MASK_RED = 1;
 676         const int MASK_GREEN = 2;
 677         const int MASK_BLUE = 3;
 678         const int MASK_BLUE_REPLACEMENT = 2;
 679
 680         image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 681         GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 682
 683         for (int y = 0; y < h; y++)
 684         {
 685             for (int x = 0; x < w; x++, data += 3)
 686             {
 687                 if (gdk_image_get_pixel(image_mask, x, y) == 0)
 688                 {
 689                     data[0] = MASK_RED;
 690                     data[1] = MASK_GREEN;
 691                     data[2] = MASK_BLUE;
 692                 }
 693                 else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 694                 {
 695                     data[2] = MASK_BLUE_REPLACEMENT;
 696                 }
 697             }
 698         }
 699         g_object_unref(image_mask);
 700     }
 701
 702     return image;
 703 }
 704
 705 wxBitmap::wxBitmap( const wxString &filename, wxBitmapType type )
 706 {
 707     LoadFile( filename, type );
 708 }
 709
 710 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
 711 {
 712     if ( width > 0 && height > 0 )
 713     {
 714         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 715
 716         wxASSERT_MSG( M_BMPDATA->m_pixmap, wxT("couldn't create bitmap") );
 717     }
 718 }
 719
 720 wxBitmap::~wxBitmap()
 721 {
 722 }
 723
 724 bool wxBitmap::operator == ( const wxBitmap& bmp ) const
 725 {
 726     return m_refData == bmp.m_refData;
 727 }
 728
 729 bool wxBitmap::operator != ( const wxBitmap& bmp ) const
 730 {
 731     return m_refData != bmp.m_refData;
 732 }
 733
 734 bool wxBitmap::Ok() const
 735 {
 736     return (m_refData != NULL) &&
 737            (
 738               M_BMPDATA->m_pixbuf ||
 739               M_BMPDATA->m_pixmap
 740            );
 741 }
 742
 743 int wxBitmap::GetHeight() const
 744 {
 745     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 746
 747     return M_BMPDATA->m_height;
 748 }
 749
 750 int wxBitmap::GetWidth() const
 751 {
 752     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 753
 754     return M_BMPDATA->m_width;
 755 }
 756
 757 int wxBitmap::GetDepth() const
 758 {
 759     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 760
 761     return M_BMPDATA->m_bpp;
 762 }
 763
 764 wxMask *wxBitmap::GetMask() const
 765 {
 766     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 767
 768     return M_BMPDATA->m_mask;
 769 }
 770
 771 void wxBitmap::SetMask( wxMask *mask )
 772 {
 773     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 774
 775     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
 776
 777     M_BMPDATA->m_mask = mask;
 778 }
 779
 780 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 781 {
 782     *this = icon;
 783     return Ok();
 784 }
 785
 786 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 787 {
 788     wxBitmap ret;
 789
 790     wxCHECK_MSG( Ok() &&
 791                  (rect.x >= 0) && (rect.y >= 0) &&
 792                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
 793                  ret, wxT("invalid bitmap or bitmap region") );
 794
 795     if (HasPixbuf())
 796     {
 797         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 798                                            gdk_pixbuf_get_has_alpha(GetPixbuf()),
 799                                            8, rect.width, rect.height);
 800         ret.SetPixbuf(pixbuf);
 801         ret.SetDepth(M_BMPDATA->m_bpp);
 802         gdk_pixbuf_copy_area(GetPixbuf(),
 803                              rect.x, rect.y, rect.width, rect.height,
 804                              pixbuf, 0, 0);
 805     }
 806     else
 807     {
 808         ret = wxBitmap(rect.width, rect.height, M_BMPDATA->m_bpp);
 809         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
 810         gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 811         g_object_unref (gc);
 812     }
 813     // make mask, unless there is already alpha
 814     if (GetMask() && !HasAlpha())
 815     {
 816         wxMask *mask = new wxMask;
 817         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 818
 819         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
 820         gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
 821         g_object_unref (gc);
 822
 823         ret.SetMask( mask );
 824     }
 825
 826     return ret;
 827 }
 828
 829 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 830 {
 831     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 832
 833     // Try to save the bitmap via wxImage handlers:
 834     wxImage image = ConvertToImage();
 835     return image.Ok() && image.SaveFile(name, type);
 836 }
 837
 838 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 839 {
 840     UnRef();
 841
 842     if (type == wxBITMAP_TYPE_XPM)
 843     {
 844         GdkBitmap *mask = (GdkBitmap*) NULL;
 845         SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
 846
 847         if (mask)
 848         {
 849             M_BMPDATA->m_mask = new wxMask;
 850             M_BMPDATA->m_mask->m_bitmap = mask;
 851         }
 852     }
 853     else // try if wxImage can load it
 854     {
 855         wxImage image;
 856         if (image.LoadFile(name, type) && image.Ok())
 857             *this = wxBitmap(image);
 858     }
 859
 860     return Ok();
 861 }
 862
 863 #if wxUSE_PALETTE
 864 wxPalette *wxBitmap::GetPalette() const
 865 {
 866     if (!Ok())
 867         return (wxPalette *) NULL;
 868
 869     return M_BMPDATA->m_palette;
 870 }
 871
 872 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 873 {
 874     // TODO
 875 }
 876 #endif // wxUSE_PALETTE
 877
 878 void wxBitmap::SetHeight( int height )
 879 {
 880     if (!m_refData)
 881         m_refData = new wxBitmapRefData;
 882
 883     M_BMPDATA->m_height = height;
 884 }
 885
 886 void wxBitmap::SetWidth( int width )
 887 {
 888     if (!m_refData)
 889         m_refData = new wxBitmapRefData;
 890
 891     M_BMPDATA->m_width = width;
 892 }
 893
 894 void wxBitmap::SetDepth( int depth )
 895 {
 896     if (!m_refData)
 897         m_refData = new wxBitmapRefData;
 898
 899     M_BMPDATA->m_bpp = depth;
 900 }
 901
 902 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 903 {
 904     if (!m_refData)
 905         m_refData = new wxBitmapRefData;
 906
 907     wxASSERT(M_BMPDATA->m_pixmap == NULL);
 908     M_BMPDATA->m_pixmap = pixmap;
 909     gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
 910     M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
 911     PurgeOtherRepresentations(Pixmap);
 912 }
 913
 914 GdkPixmap *wxBitmap::GetPixmap() const
 915 {
 916     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
 917
 918     // create the pixmap on the fly if we use Pixbuf representation:
 919     if (M_BMPDATA->m_pixmap == NULL)
 920     {
 921         GdkPixmap** pmask = NULL;
 922         if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
 923         {
 924             // make new mask from alpha
 925             delete M_BMPDATA->m_mask;
 926             M_BMPDATA->m_mask = new wxMask;
 927             pmask = &M_BMPDATA->m_mask->m_bitmap;
 928         }
 929         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
 930                                           &M_BMPDATA->m_pixmap,
 931                                           pmask,
 932                                           128 /*threshold*/);
 933     }
 934
 935     return M_BMPDATA->m_pixmap;
 936 }
 937
 938 bool wxBitmap::HasPixmap() const
 939 {
 940     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 941
 942     return M_BMPDATA->m_pixmap != NULL;
 943 }
 944
 945 GdkPixbuf *wxBitmap::GetPixbuf() const
 946 {
 947     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 948
 949     if (M_BMPDATA->m_pixbuf == NULL)
 950     {
 951         int width = GetWidth();
 952         int height = GetHeight();
 953
 954         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 955                                            GetMask() != NULL,
 956                                            8, width, height);
 957         M_BMPDATA->m_pixbuf =
 958             gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
 959                                          0, 0, 0, 0, width, height);
 960
 961         // apply the mask to created pixbuf:
 962         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
 963         {
 964             GdkPixbuf *pmask =
 965                 gdk_pixbuf_get_from_drawable(NULL,
 966                                              M_BMPDATA->m_mask->GetBitmap(),
 967                                              NULL,
 968                                              0, 0, 0, 0, width, height);
 969             if (pmask)
 970             {
 971                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
 972                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
 973                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 974                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
 975
 976                 for (int y = 0; y < height;
 977                      y++, bmp += bmprowinc, mask += maskrowinc)
 978                 {
 979                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
 980                     {
 981                         if (mask[0] == 0 /*black pixel*/)
 982                             bmp[3] = 0;
 983                     }
 984                 }
 985
 986                 g_object_unref (pmask);
 987             }
 988         }
 989     }
 990
 991     return M_BMPDATA->m_pixbuf;
 992 }
 993
 994 bool wxBitmap::HasPixbuf() const
 995 {
 996     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 997
 998     return M_BMPDATA->m_pixbuf != NULL;
 999 }
1000
1001 void wxBitmap::SetPixbuf( GdkPixbuf *pixbuf )
1002 {
1003     if (!m_refData)
1004         m_refData = new wxBitmapRefData;
1005
1006     wxASSERT(M_BMPDATA->m_pixbuf == NULL);
1007     M_BMPDATA->m_pixbuf = pixbuf;
1008     M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
1009     M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
1010     PurgeOtherRepresentations(Pixbuf);
1011 }
1012
1013 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
1014 {
1015     if (keep == Pixmap && HasPixbuf())
1016     {
1017         g_object_unref (M_BMPDATA->m_pixbuf);
1018         M_BMPDATA->m_pixbuf = NULL;
1019     }
1020     if (keep == Pixbuf && HasPixmap())
1021     {
1022         g_object_unref (M_BMPDATA->m_pixmap);
1023         M_BMPDATA->m_pixmap = NULL;
1024     }
1025 }
1026
1027 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1028 {
1029     void* bits = NULL;
1030     GdkPixbuf *pixbuf = GetPixbuf();
1031     const bool hasAlpha = HasAlpha();
1032     // allow access if bpp is valid and matches existence of alpha
1033     if (pixbuf != NULL && (
1034         bpp == 24 && !hasAlpha ||
1035         bpp == 32 && hasAlpha))
1036     {
1037         data.m_height = gdk_pixbuf_get_height( pixbuf );
1038         data.m_width = gdk_pixbuf_get_width( pixbuf );
1039         data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
1040         bits = gdk_pixbuf_get_pixels(pixbuf);
1041     }
1042     return bits;
1043 }
1044
1045 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
1046 {
1047 }
1048
1049 bool wxBitmap::HasAlpha() const
1050 {
1051     return m_refData != NULL && M_BMPDATA->m_pixbuf != NULL &&
1052         gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf);
1053 }
1054
1055 void wxBitmap::UseAlpha()
1056 {
1057     GdkPixbuf* pixbuf = GetPixbuf();
1058     // add alpha if necessary
1059     if (!gdk_pixbuf_get_has_alpha(pixbuf))
1060     {
1061         M_BMPDATA->m_pixbuf = NULL;
1062         SetPixbuf(gdk_pixbuf_add_alpha(pixbuf, false, 0, 0, 0));
1063         g_object_unref(pixbuf);
1064     }
1065 }
1066
1067 //-----------------------------------------------------------------------------
1068 // wxBitmapHandler
1069 //-----------------------------------------------------------------------------
1070
1071 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler,wxBitmapHandlerBase)
1072
1073 wxBitmapHandler::~wxBitmapHandler()
1074 {
1075 }
1076
1077 bool wxBitmapHandler::Create(wxBitmap * WXUNUSED(bitmap),
1078                              void * WXUNUSED(data),
1079                              long WXUNUSED(type),
1080                              int WXUNUSED(width),
1081                              int WXUNUSED(height),
1082                              int WXUNUSED(depth))
1083 {
1084     wxFAIL_MSG( _T("not implemented") );
1085
1086     return false;
1087 }
1088
1089 bool wxBitmapHandler::LoadFile(wxBitmap * WXUNUSED(bitmap),
1090                                const wxString& WXUNUSED(name),
1091                                long WXUNUSED(flags),
1092                                int WXUNUSED(desiredWidth),
1093                                int WXUNUSED(desiredHeight))
1094 {
1095     wxFAIL_MSG( _T("not implemented") );
1096
1097     return false;
1098 }
1099
1100 bool wxBitmapHandler::SaveFile(const wxBitmap * WXUNUSED(bitmap),
1101                                const wxString& WXUNUSED(name),
1102                                int WXUNUSED(type),
1103                                const wxPalette * WXUNUSED(palette))
1104 {
1105     wxFAIL_MSG( _T("not implemented") );
1106
1107     return false;
1108 }
1109
1110 /* static */ void wxBitmap::InitStandardHandlers()
1111 {
1112     // TODO: Insert handler based on GdkPixbufs handler later
1113 }