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     if (HasPixbuf())
 303     {
 304         bmp.SetDepth(GetDepth());
 305         bmp.SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 306                                      true, //gdk_pixbuf_get_has_alpha(GetPixbuf()),
 307                                      8, width, height));
 308         gdk_pixbuf_scale(GetPixbuf(), bmp.GetPixbuf(),
 309                          0, 0, width, height,
 310                          clipx, clipy,
 311                          (double)newx/GetWidth(), (double)newy/GetHeight(),
 312                          GDK_INTERP_BILINEAR);
 313     }
 314     else
 315     {
 316         GdkImage* img = gdk_drawable_get_image(GetPixmap(), 0, 0, GetWidth(), GetHeight());
 317
 318         wxCHECK_MSG(img, bmp, wxT("couldn't create image"));
 319
 320         GdkGC *gc = NULL;
 321         GdkPixmap *dstpix = NULL;
 322         char *dst = NULL;
 323         long dstbyteperline = 0;
 324
 325         if (GetDepth() != 1)
 326         {
 327             GdkVisual *visual = gdk_drawable_get_visual( GetPixmap() );
 328             if (visual == NULL)
 329                 visual = wxTheApp->GetGdkVisual();
 330
 331             bmp = wxBitmap(width, height, visual->depth);
 332             dstpix = bmp.GetPixmap();
 333             gc = gdk_gc_new( dstpix );
 334         }
 335         else
 336         {
 337             dstbyteperline = (width + 7) / 8;
 338             dst = (char*) malloc(dstbyteperline*height);
 339         }
 340
 341         // be careful to use the right scaling factor
 342         float scx = (float)M_BMPDATA->m_width/(float)newx;
 343         float scy = (float)M_BMPDATA->m_height/(float)newy;
 344         // prepare accel-tables
 345         int *tablex = (int *)calloc(width,sizeof(int));
 346         int *tabley = (int *)calloc(height,sizeof(int));
 347
 348         // accel table filled with clipped values
 349         for (int x = 0; x < width; x++)
 350             tablex[x] = (int) (scx * (x+clipx));
 351         for (int y = 0; y < height; y++)
 352             tabley[y] = (int) (scy * (y+clipy));
 353
 354         // Main rescaling routine starts here
 355         for (int h = 0; h < height; h++)
 356         {
 357             char outbyte = 0;
 358             int old_x = -1;
 359             guint32 old_pixval = 0;
 360
 361             for (int w = 0; w < width; w++)
 362             {
 363                 guint32 pixval;
 364                 int x = tablex[w];
 365                 if (x == old_x)
 366                     pixval = old_pixval;
 367                 else
 368                 {
 369                     pixval = gdk_image_get_pixel( img, x, tabley[h] );
 370                     old_pixval = pixval;
 371                     old_x = x;
 372                 }
 373
 374                 if ( dst )
 375                 {
 376                     if (!pixval)
 377                     {
 378                         char bit=1;
 379                         char shift = bit << (w % 8);
 380                         outbyte |= shift;
 381                     }
 382
 383                     if ((w+1)%8==0)
 384                     {
 385                         dst[h*dstbyteperline+w/8] = outbyte;
 386                         outbyte = 0;
 387                     }
 388                 }
 389                 else
 390                 {
 391                     GdkColor col;
 392                     col.pixel = pixval;
 393                     gdk_gc_set_foreground( gc, &col );
 394                     gdk_draw_point( dstpix, gc, w, h);
 395                 }
 396             }
 397
 398             // do not forget the last byte
 399             if ( dst && (width % 8 != 0) )
 400                 dst[h*dstbyteperline+width/8] = outbyte;
 401         }
 402
 403         g_object_unref (img);
 404         if (gc) g_object_unref (gc);
 405
 406         if ( dst )
 407         {
 408             bmp = wxBitmap( (const char *)dst, width, height, 1 );
 409             free( dst );
 410         }
 411
 412         if (GetMask())
 413         {
 414             dstbyteperline = (width + 7) / 8;
 415             dst = (char*) malloc(dstbyteperline*height);
 416             img = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight());
 417
 418             for (int h = 0; h < height; h++)
 419             {
 420                 char outbyte = 0;
 421                 int old_x = -1;
 422                 guint32 old_pixval = 0;
 423
 424                 for (int w = 0; w < width; w++)
 425                 {
 426                     guint32 pixval;
 427                     int x = tablex[w];
 428                     if (x == old_x)
 429                         pixval = old_pixval;
 430                     else
 431                     {
 432                         pixval = gdk_image_get_pixel( img, x, tabley[h] );
 433                         old_pixval = pixval;
 434                         old_x = x;
 435                     }
 436
 437                     if (pixval)
 438                     {
 439                         char bit=1;
 440                         char shift = bit << (w % 8);
 441                         outbyte |= shift;
 442                     }
 443
 444                     if ((w+1)%8 == 0)
 445                     {
 446                         dst[h*dstbyteperline+w/8] = outbyte;
 447                         outbyte = 0;
 448                     }
 449                 }
 450
 451                 // do not forget the last byte
 452                 if (width % 8 != 0)
 453                     dst[h*dstbyteperline+width/8] = outbyte;
 454             }
 455             wxMask* mask = new wxMask;
 456             mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
 457             bmp.SetMask(mask);
 458
 459             free( dst );
 460             g_object_unref (img);
 461         }
 462
 463         free( tablex );
 464         free( tabley );
 465     }
 466
 467     return bmp;
 468 }
 469
 470 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 471 {
 472     UnRef();
 473
 474     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 475     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 476
 477     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 478         return false;
 479
 480     if (depth == 1)
 481         return CreateFromImageAsPixmap(image, depth);
 482
 483     if (image.HasAlpha())
 484         return CreateFromImageAsPixbuf(image);
 485
 486     return CreateFromImageAsPixmap(image, depth);
 487 }
 488
 489 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
 490 {
 491     const int w = image.GetWidth();
 492     const int h = image.GetHeight();
 493     if (depth == 1)
 494     {
 495         // create XBM format bitmap
 496
 497         // one bit per pixel, each row starts on a byte boundary
 498         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 499         wxByte* out = new wxByte[out_size];
 500         // set bits are black
 501         memset(out, 0xff, out_size);
 502         const wxByte* in = image.GetData();
 503         unsigned bit_index = 0;
 504         for (int y = 0; y < h; y++)
 505         {
 506             for (int x = 0; x < w; x++, in += 3, bit_index++)
 507                 if (in[0] == 255 && in[1] == 255 && in[2] == 255)
 508                     out[bit_index >> 3] ^= 1 << (bit_index & 7);
 509             // move index to next byte boundary
 510             bit_index = (bit_index + 7) & ~7u;
 511         }
 512         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
 513         delete[] out;
 514     }
 515     else
 516     {
 517         SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
 518         GdkGC* gc = gdk_gc_new(M_BMPDATA->m_pixmap);
 519         gdk_draw_rgb_image(
 520             M_BMPDATA->m_pixmap, gc,
 521             0, 0, w, h,
 522             GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
 523         g_object_unref(gc);
 524     }
 525
 526     const wxByte* alpha = image.GetAlpha();
 527     if (alpha != NULL || image.HasMask())
 528     {
 529         // create mask as XBM format bitmap
 530
 531         const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
 532         wxByte* out = new wxByte[out_size];
 533         memset(out, 0xff, out_size);
 534         unsigned bit_index = 0;
 535         if (alpha != NULL)
 536         {
 537             for (int y = 0; y < h; y++)
 538             {
 539                 for (int x = 0; x < w; x++, bit_index++)
 540                     if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
 541                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 542                 bit_index = (bit_index + 7) & ~7u;
 543             }
 544         }
 545         else
 546         {
 547             const wxByte r_mask = image.GetMaskRed();
 548             const wxByte g_mask = image.GetMaskGreen();
 549             const wxByte b_mask = image.GetMaskBlue();
 550             const wxByte* in = image.GetData();
 551             for (int y = 0; y < h; y++)
 552             {
 553                 for (int x = 0; x < w; x++, in += 3, bit_index++)
 554                     if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
 555                         out[bit_index >> 3] ^= 1 << (bit_index & 7);
 556                 bit_index = (bit_index + 7) & ~7u;
 557             }
 558         }
 559         wxMask* mask = new wxMask;
 560         mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
 561         SetMask(mask);
 562         delete[] out;
 563     }
 564     return true;
 565 }
 566
 567 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 568 {
 569     int width = image.GetWidth();
 570     int height = image.GetHeight();
 571
 572     GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 573                                        true, //image.HasAlpha(),
 574                                        8 /* bits per sample */,
 575                                        width, height);
 576     if (!pixbuf)
 577         return false;
 578
 579     wxASSERT( image.HasAlpha() ); // for now
 580     wxASSERT( gdk_pixbuf_get_n_channels(pixbuf) == 4 );
 581     wxASSERT( gdk_pixbuf_get_width(pixbuf) == width );
 582     wxASSERT( gdk_pixbuf_get_height(pixbuf) == height );
 583
 584     SetDepth(32);
 585     SetPixbuf(pixbuf);
 586
 587     // Copy the data:
 588     unsigned char *in = image.GetData();
 589     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 590     unsigned char *alpha = image.GetAlpha();
 591
 592     int rowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 593
 594     for (int y = 0; y < height; y++, out += rowinc)
 595     {
 596         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 597         {
 598             out[0] = in[0];
 599             out[1] = in[1];
 600             out[2] = in[2];
 601             out[3] = *alpha;
 602         }
 603     }
 604
 605     return true;
 606 }
 607
 608 wxImage wxBitmap::ConvertToImage() const
 609 {
 610     wxImage image;
 611
 612     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 613
 614     const int w = GetWidth();
 615     const int h = GetHeight();
 616     image.Create(w, h);
 617     unsigned char *data = image.GetData();
 618
 619     wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
 620
 621     if (HasPixbuf())
 622     {
 623         GdkPixbuf *pixbuf = GetPixbuf();
 624         wxASSERT( gdk_pixbuf_get_has_alpha(pixbuf) );
 625
 626         image.SetAlpha();
 627
 628         unsigned char *alpha = image.GetAlpha();
 629         unsigned char *in = gdk_pixbuf_get_pixels(pixbuf);
 630         unsigned char *out = data;
 631         int rowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * w;
 632
 633         for (int y = 0; y < h; y++, in += rowinc)
 634         {
 635             for (int x = 0; x < w; x++, in += 4, out += 3, alpha++)
 636             {
 637                 out[0] = in[0];
 638                 out[1] = in[1];
 639                 out[2] = in[2];
 640                 *alpha = in[3];
 641             }
 642         }
 643     }
 644     else
 645     {
 646         GdkPixmap* pixmap = GetPixmap();
 647         GdkPixmap* pixmap_invert = NULL;
 648         if (GetDepth() == 1)
 649         {
 650             // mono bitmaps are inverted, i.e. 0 is white
 651             pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
 652             GdkGC* gc = gdk_gc_new(pixmap_invert);
 653             gdk_gc_set_function(gc, GDK_COPY_INVERT);
 654             gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
 655             g_object_unref(gc);
 656             pixmap = pixmap_invert;
 657         }
 658         // create a pixbuf which shares data with the wxImage
 659         GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
 660             data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
 661
 662         gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
 663
 664         g_object_unref(pixbuf);
 665         if (pixmap_invert != NULL)
 666             g_object_unref(pixmap_invert);
 667
 668         if (GetMask())
 669         {
 670             // the colour used as transparent one in wxImage and the one it is
 671             // replaced with when it really occurs in the bitmap
 672             const int MASK_RED = 1;
 673             const int MASK_GREEN = 2;
 674             const int MASK_BLUE = 3;
 675             const int MASK_BLUE_REPLACEMENT = 2;
 676
 677             image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
 678             GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
 679
 680             for (int y = 0; y < h; y++)
 681             {
 682                 for (int x = 0; x < w; x++, data += 3)
 683                 {
 684                     if (gdk_image_get_pixel(image_mask, x, y) == 0)
 685                     {
 686                         data[0] = MASK_RED;
 687                         data[1] = MASK_GREEN;
 688                         data[2] = MASK_BLUE;
 689                     }
 690                     else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
 691                     {
 692                         data[2] = MASK_BLUE_REPLACEMENT;
 693                     }
 694                 }
 695             }
 696             g_object_unref(image_mask);
 697         }
 698     }
 699
 700     return image;
 701 }
 702
 703 wxBitmap::wxBitmap( const wxString &filename, wxBitmapType type )
 704 {
 705     LoadFile( filename, type );
 706 }
 707
 708 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
 709 {
 710     if ( width > 0 && height > 0 )
 711     {
 712         SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 713
 714         wxASSERT_MSG( M_BMPDATA->m_pixmap, wxT("couldn't create bitmap") );
 715     }
 716 }
 717
 718 wxBitmap::~wxBitmap()
 719 {
 720 }
 721
 722 bool wxBitmap::operator == ( const wxBitmap& bmp ) const
 723 {
 724     return m_refData == bmp.m_refData;
 725 }
 726
 727 bool wxBitmap::operator != ( const wxBitmap& bmp ) const
 728 {
 729     return m_refData != bmp.m_refData;
 730 }
 731
 732 bool wxBitmap::Ok() const
 733 {
 734     return (m_refData != NULL) &&
 735            (
 736               M_BMPDATA->m_pixbuf ||
 737               M_BMPDATA->m_pixmap
 738            );
 739 }
 740
 741 int wxBitmap::GetHeight() const
 742 {
 743     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 744
 745     return M_BMPDATA->m_height;
 746 }
 747
 748 int wxBitmap::GetWidth() const
 749 {
 750     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 751
 752     return M_BMPDATA->m_width;
 753 }
 754
 755 int wxBitmap::GetDepth() const
 756 {
 757     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 758
 759     return M_BMPDATA->m_bpp;
 760 }
 761
 762 wxMask *wxBitmap::GetMask() const
 763 {
 764     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 765
 766     return M_BMPDATA->m_mask;
 767 }
 768
 769 void wxBitmap::SetMask( wxMask *mask )
 770 {
 771     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 772
 773     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
 774
 775     M_BMPDATA->m_mask = mask;
 776 }
 777
 778 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 779 {
 780     *this = icon;
 781     return Ok();
 782 }
 783
 784 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 785 {
 786     wxBitmap ret;
 787
 788     wxCHECK_MSG( Ok() &&
 789                  (rect.x >= 0) && (rect.y >= 0) &&
 790                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
 791                  ret, wxT("invalid bitmap or bitmap region") );
 792
 793     if (HasPixbuf())
 794     {
 795         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 796                                            true, //gdk_pixbuf_get_has_alpha(GetPixbuf()),
 797                                            8, rect.width, rect.height);
 798         ret.SetPixbuf(pixbuf);
 799         ret.SetDepth(M_BMPDATA->m_bpp);
 800         gdk_pixbuf_copy_area(GetPixbuf(),
 801                              rect.x, rect.y, rect.width, rect.height,
 802                              pixbuf, 0, 0);
 803     }
 804     else
 805     {
 806         ret = wxBitmap(rect.width, rect.height, M_BMPDATA->m_bpp);
 807         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
 808         gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 809         g_object_unref (gc);
 810     }
 811
 812     if (GetMask())
 813     {
 814         wxMask *mask = new wxMask;
 815         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
 816
 817         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
 818         gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
 819         g_object_unref (gc);
 820
 821         ret.SetMask( mask );
 822     }
 823
 824     return ret;
 825 }
 826
 827 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 828 {
 829     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 830
 831     // Try to save the bitmap via wxImage handlers:
 832     wxImage image = ConvertToImage();
 833     return image.Ok() && image.SaveFile(name, type);
 834 }
 835
 836 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 837 {
 838     UnRef();
 839
 840     if (type == wxBITMAP_TYPE_XPM)
 841     {
 842         GdkBitmap *mask = (GdkBitmap*) NULL;
 843         SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
 844
 845         if (mask)
 846         {
 847             M_BMPDATA->m_mask = new wxMask;
 848             M_BMPDATA->m_mask->m_bitmap = mask;
 849         }
 850     }
 851     else // try if wxImage can load it
 852     {
 853         wxImage image;
 854         if (image.LoadFile(name, type) && image.Ok())
 855             *this = wxBitmap(image);
 856     }
 857
 858     return Ok();
 859 }
 860
 861 #if wxUSE_PALETTE
 862 wxPalette *wxBitmap::GetPalette() const
 863 {
 864     if (!Ok())
 865         return (wxPalette *) NULL;
 866
 867     return M_BMPDATA->m_palette;
 868 }
 869
 870 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 871 {
 872     // TODO
 873 }
 874 #endif // wxUSE_PALETTE
 875
 876 void wxBitmap::SetHeight( int height )
 877 {
 878     if (!m_refData)
 879         m_refData = new wxBitmapRefData;
 880
 881     M_BMPDATA->m_height = height;
 882 }
 883
 884 void wxBitmap::SetWidth( int width )
 885 {
 886     if (!m_refData)
 887         m_refData = new wxBitmapRefData;
 888
 889     M_BMPDATA->m_width = width;
 890 }
 891
 892 void wxBitmap::SetDepth( int depth )
 893 {
 894     if (!m_refData)
 895         m_refData = new wxBitmapRefData;
 896
 897     M_BMPDATA->m_bpp = depth;
 898 }
 899
 900 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 901 {
 902     if (!m_refData)
 903         m_refData = new wxBitmapRefData;
 904
 905     wxASSERT(M_BMPDATA->m_pixmap == NULL);
 906     M_BMPDATA->m_pixmap = pixmap;
 907     gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
 908     M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
 909     PurgeOtherRepresentations(Pixmap);
 910 }
 911
 912 GdkPixmap *wxBitmap::GetPixmap() const
 913 {
 914     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
 915
 916     // create the pixmap on the fly if we use Pixbuf representation:
 917     if (M_BMPDATA->m_pixmap == NULL)
 918     {
 919         delete M_BMPDATA->m_mask;
 920         M_BMPDATA->m_mask = new wxMask;
 921         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
 922                                           &M_BMPDATA->m_pixmap,
 923                                           &M_BMPDATA->m_mask->m_bitmap,
 924                                           128 /*threshold*/);
 925     }
 926
 927     return M_BMPDATA->m_pixmap;
 928 }
 929
 930 bool wxBitmap::HasPixmap() const
 931 {
 932     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 933
 934     return M_BMPDATA->m_pixmap != NULL;
 935 }
 936
 937 GdkPixbuf *wxBitmap::GetPixbuf() const
 938 {
 939     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
 940
 941     if (M_BMPDATA->m_pixbuf == NULL)
 942     {
 943         int width = GetWidth();
 944         int height = GetHeight();
 945
 946         // always create the alpha channel so raw bitmap access will work
 947         // correctly
 948         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 949                                            true, // GetMask() != NULL,
 950                                            8, width, height);
 951         M_BMPDATA->m_pixbuf =
 952             gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
 953                                          0, 0, 0, 0, width, height);
 954
 955         // apply the mask to created pixbuf:
 956         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
 957         {
 958             GdkPixbuf *pmask =
 959                 gdk_pixbuf_get_from_drawable(NULL,
 960                                              M_BMPDATA->m_mask->GetBitmap(),
 961                                              NULL,
 962                                              0, 0, 0, 0, width, height);
 963             if (pmask)
 964             {
 965                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
 966                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
 967                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 968                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
 969
 970                 for (int y = 0; y < height;
 971                      y++, bmp += bmprowinc, mask += maskrowinc)
 972                 {
 973                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
 974                     {
 975                         if (mask[0] == 0 /*black pixel*/)
 976                             bmp[3] = 0;
 977                     }
 978                 }
 979
 980                 g_object_unref (pmask);
 981             }
 982         }
 983     }
 984
 985     return M_BMPDATA->m_pixbuf;
 986 }
 987
 988 bool wxBitmap::HasPixbuf() const
 989 {
 990     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 991
 992     return M_BMPDATA->m_pixbuf != NULL;
 993 }
 994
 995 void wxBitmap::SetPixbuf( GdkPixbuf *pixbuf )
 996 {
 997     if (!m_refData)
 998         m_refData = new wxBitmapRefData;
 999
1000     wxASSERT(M_BMPDATA->m_pixbuf == NULL);
1001     M_BMPDATA->m_pixbuf = pixbuf;
1002     M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
1003     M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
1004     PurgeOtherRepresentations(Pixbuf);
1005 }
1006
1007 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
1008 {
1009     if (keep == Pixmap && HasPixbuf())
1010     {
1011         g_object_unref (M_BMPDATA->m_pixbuf);
1012         M_BMPDATA->m_pixbuf = NULL;
1013     }
1014     if (keep == Pixbuf && HasPixmap())
1015     {
1016         g_object_unref (M_BMPDATA->m_pixmap);
1017         M_BMPDATA->m_pixmap = NULL;
1018     }
1019 }
1020
1021 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1022 {
1023     if (bpp != 32)
1024         return NULL;
1025
1026     GdkPixbuf *pixbuf = GetPixbuf();
1027     if (!pixbuf)
1028         return NULL;
1029
1030     if (!gdk_pixbuf_get_has_alpha( pixbuf ))
1031         return NULL;
1032
1033 #if 0
1034     if (gdk_pixbuf_get_has_alpha( pixbuf ))
1035         wxPrintf( wxT("Has alpha, %d channels\n"), gdk_pixbuf_get_n_channels(pixbuf) );
1036     else
1037         wxPrintf( wxT("No alpha, %d channels.\n"), gdk_pixbuf_get_n_channels(pixbuf) );
1038 #endif
1039
1040     data.m_height = gdk_pixbuf_get_height( pixbuf );
1041     data.m_width = gdk_pixbuf_get_width( pixbuf );
1042     data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
1043
1044     return gdk_pixbuf_get_pixels( pixbuf );
1045 }
1046
1047 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
1048 {
1049 }
1050
1051
1052 bool wxBitmap::HasAlpha() const
1053 {
1054     return HasPixbuf();
1055 }
1056
1057 void wxBitmap::UseAlpha()
1058 {
1059     GetPixbuf();
1060 }
1061
1062 //-----------------------------------------------------------------------------
1063 // wxBitmapHandler
1064 //-----------------------------------------------------------------------------
1065
1066 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler,wxBitmapHandlerBase)
1067
1068 wxBitmapHandler::~wxBitmapHandler()
1069 {
1070 }
1071
1072 bool wxBitmapHandler::Create(wxBitmap * WXUNUSED(bitmap),
1073                              void * WXUNUSED(data),
1074                              long WXUNUSED(type),
1075                              int WXUNUSED(width),
1076                              int WXUNUSED(height),
1077                              int WXUNUSED(depth))
1078 {
1079     wxFAIL_MSG( _T("not implemented") );
1080
1081     return false;
1082 }
1083
1084 bool wxBitmapHandler::LoadFile(wxBitmap * WXUNUSED(bitmap),
1085                                const wxString& WXUNUSED(name),
1086                                long WXUNUSED(flags),
1087                                int WXUNUSED(desiredWidth),
1088                                int WXUNUSED(desiredHeight))
1089 {
1090     wxFAIL_MSG( _T("not implemented") );
1091
1092     return false;
1093 }
1094
1095 bool wxBitmapHandler::SaveFile(const wxBitmap * WXUNUSED(bitmap),
1096                                const wxString& WXUNUSED(name),
1097                                int WXUNUSED(type),
1098                                const wxPalette * WXUNUSED(palette))
1099 {
1100     wxFAIL_MSG( _T("not implemented") );
1101
1102     return false;
1103 }
1104
1105 /* static */ void wxBitmap::InitStandardHandlers()
1106 {
1107     // TODO: Insert handler based on GdkPixbufs handler later
1108 }