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/dcmemory.h"
  18     #include "wx/palette.h"
  19     #include "wx/icon.h"
  20     #include "wx/math.h"
  21     #include "wx/image.h"
  22 #endif
  23
  24 #include "wx/filefn.h"
  25
  26 #include "wx/rawbmp.h"
  27     // need this to get gdk_image_new_bitmap()
  28     #define GDK_ENABLE_BROKEN
  29
  30 #include <gdk/gdk.h>
  31 #include <gtk/gtk.h>
  32 #include <gdk/gdkx.h>
  33
  34 #include <gdk/gdkimage.h>
  35
  36 extern void gdk_wx_draw_bitmap     (GdkDrawable  *drawable,
  37                           GdkGC               *gc,
  38                           GdkDrawable  *src,
  39                           gint                xsrc,
  40                           gint                ysrc,
  41                           gint                xdest,
  42                           gint                ydest,
  43                           gint                width,
  44                           gint                height);
  45
  46 //-----------------------------------------------------------------------------
  47 // data
  48 //-----------------------------------------------------------------------------
  49
  50 extern GtkWidget *wxGetRootWindow();
  51
  52 //-----------------------------------------------------------------------------
  53 // wxMask
  54 //-----------------------------------------------------------------------------
  55
  56 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  57
  58 wxMask::wxMask()
  59 {
  60     m_bitmap = (GdkBitmap *) NULL;
  61 }
  62
  63 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  64 {
  65     m_bitmap = (GdkBitmap *) NULL;
  66     Create( bitmap, colour );
  67 }
  68
  69 #if wxUSE_PALETTE
  70 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  71 {
  72     m_bitmap = (GdkBitmap *) NULL;
  73     Create( bitmap, paletteIndex );
  74 }
  75 #endif // wxUSE_PALETTE
  76
  77 wxMask::wxMask( const wxBitmap& bitmap )
  78 {
  79     m_bitmap = (GdkBitmap *) NULL;
  80     Create( bitmap );
  81 }
  82
  83 wxMask::~wxMask()
  84 {
  85     if (m_bitmap)
  86         g_object_unref (m_bitmap);
  87 }
  88
  89 bool wxMask::Create( const wxBitmap& bitmap,
  90                      const wxColour& colour )
  91 {
  92     if (m_bitmap)
  93     {
  94         g_object_unref (m_bitmap);
  95         m_bitmap = (GdkBitmap*) NULL;
  96     }
  97
  98     wxImage image = bitmap.ConvertToImage();
  99     if (!image.Ok()) return false;
 100
 101     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, image.GetWidth(), image.GetHeight(), 1 );
 102     GdkGC *gc = gdk_gc_new( m_bitmap );
 103
 104     GdkColor color;
 105     color.red = 65000;
 106     color.green = 65000;
 107     color.blue = 65000;
 108     color.pixel = 1;
 109     gdk_gc_set_foreground( gc, &color );
 110     gdk_gc_set_fill( gc, GDK_SOLID );
 111     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
 112
 113     unsigned char *data = image.GetData();
 114     int index = 0;
 115
 116     unsigned char red = colour.Red();
 117     unsigned char green = colour.Green();
 118     unsigned char blue = colour.Blue();
 119
 120     GdkVisual *visual = wxTheApp->GetGdkVisual();
 121
 122     int bpp = visual->depth;
 123     if ((bpp == 16) && (visual->red_mask != 0xf800))
 124         bpp = 15;
 125     if (bpp == 15)
 126     {
 127         red = red & 0xf8;
 128         green = green & 0xf8;
 129         blue = blue & 0xf8;
 130     }
 131     else if (bpp == 16)
 132     {
 133         red = red & 0xf8;
 134         green = green & 0xfc;
 135         blue = blue & 0xf8;
 136     }
 137     else if (bpp == 12)
 138     {
 139         red = red & 0xf0;
 140         green = green & 0xf0;
 141         blue = blue & 0xf0;
 142     }
 143
 144     color.red = 0;
 145     color.green = 0;
 146     color.blue = 0;
 147     color.pixel = 0;
 148     gdk_gc_set_foreground( gc, &color );
 149
 150     for (int j = 0; j < image.GetHeight(); j++)
 151     {
 152         int start_x = -1;
 153         int i;
 154         for (i = 0; i < image.GetWidth(); i++)
 155         {
 156             if ((data[index] == red) &&
 157                 (data[index+1] == green) &&
 158                 (data[index+2] == blue))
 159             {
 160                 if (start_x == -1)
 161                 start_x = i;
 162             }
 163             else
 164             {
 165                 if (start_x != -1)
 166                 {
 167                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 168                     start_x = -1;
 169                 }
 170             }
 171             index += 3;
 172         }
 173         if (start_x != -1)
 174             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 175     }
 176
 177     g_object_unref (gc);
 178
 179     return true;
 180 }
 181
 182 #if wxUSE_PALETTE
 183 bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 184 {
 185     unsigned char r,g,b;
 186     wxPalette *pal = bitmap.GetPalette();
 187
 188     wxCHECK_MSG( pal, false, wxT("Cannot create mask from bitmap without palette") );
 189
 190     pal->GetRGB(paletteIndex, &r, &g, &b);
 191
 192     return Create(bitmap, wxColour(r, g, b));
 193 }
 194 #endif // wxUSE_PALETTE
 195
 196 bool wxMask::Create( const wxBitmap& bitmap )
 197 {
 198     if (m_bitmap)
 199     {
 200         g_object_unref (m_bitmap);
 201         m_bitmap = (GdkBitmap*) NULL;
 202     }
 203
 204     if (!bitmap.Ok()) return false;
 205
 206     wxCHECK_MSG( bitmap.GetDepth() == 1, false, wxT("Cannot create mask from colour bitmap") );
 207
 208     m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 209
 210     if (!m_bitmap) return false;
 211
 212     GdkGC *gc = gdk_gc_new( m_bitmap );
 213
 214     gdk_wx_draw_bitmap( m_bitmap, gc, bitmap.GetPixmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
 215
 216     g_object_unref (gc);
 217
 218     return true;
 219 }
 220
 221 GdkBitmap *wxMask::GetBitmap() const
 222 {
 223     return m_bitmap;
 224 }
 225
 226 //-----------------------------------------------------------------------------
 227 // wxBitmap
 228 //-----------------------------------------------------------------------------
 229
 230 class wxBitmapRefData: public wxObjectRefData
 231 {
 232 public:
 233     wxBitmapRefData();
 234     ~wxBitmapRefData();
 235
 236     GdkPixmap      *m_pixmap;
 237     GdkPixbuf      *m_pixbuf;
 238     wxMask         *m_mask;
 239     int             m_width;
 240     int             m_height;
 241     int             m_bpp;
 242     wxPalette      *m_palette;
 243 };
 244
 245 wxBitmapRefData::wxBitmapRefData()
 246 {
 247     m_pixmap = (GdkPixmap *) NULL;
 248     m_pixbuf = (GdkPixbuf *) NULL;
 249     m_mask = (wxMask *) NULL;
 250     m_width = 0;
 251     m_height = 0;
 252     m_bpp = 0;
 253     m_palette = (wxPalette *) NULL;
 254 }
 255
 256 wxBitmapRefData::~wxBitmapRefData()
 257 {
 258     if (m_pixmap)
 259         g_object_unref (m_pixmap);
 260     if (m_pixbuf)
 261         g_object_unref (m_pixbuf);
 262     delete m_mask;
 263 #if wxUSE_PALETTE
 264     delete m_palette;
 265 #endif // wxUSE_PALETTE
 266 }
 267
 268 //-----------------------------------------------------------------------------
 269
 270 #define M_BMPDATA wx_static_cast(wxBitmapRefData*, m_refData)
 271
 272 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 273
 274 wxBitmap::wxBitmap()
 275 {
 276 }
 277
 278 wxBitmap::wxBitmap( int width, int height, int depth )
 279 {
 280     Create( width, height, depth );
 281 }
 282
 283 bool wxBitmap::Create( int width, int height, int depth )
 284 {
 285     UnRef();
 286
 287     if ( width <= 0 || height <= 0 )
 288     {
 289         return false;
 290     }
 291
 292     GdkVisual *visual = wxTheApp->GetGdkVisual();
 293
 294     if (depth == -1)
 295         depth = visual->depth;
 296
 297     wxCHECK_MSG( (depth == visual->depth) || (depth == 1) || (depth == 32), false,
 298                     wxT("invalid bitmap depth") );
 299
 300     m_refData = new wxBitmapRefData();
 301     M_BMPDATA->m_mask = (wxMask *) NULL;
 302     M_BMPDATA->m_width = width;
 303     M_BMPDATA->m_height = height;
 304     M_BMPDATA->m_bpp = depth;
 305     if (depth == 32)
 306     {
 307         M_BMPDATA->m_pixbuf = gdk_pixbuf_new( GDK_COLORSPACE_RGB, true,
 308                                               8, width, height);
 309     }
 310     else
 311     {
 312         M_BMPDATA->m_pixmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, depth );
 313     }
 314
 315     return Ok();
 316 }
 317
 318 bool wxBitmap::CreateFromXpm( const char **bits )
 319 {
 320     UnRef();
 321
 322     wxCHECK_MSG( bits != NULL, false, wxT("invalid bitmap data") );
 323
 324     GdkVisual *visual = wxTheApp->GetGdkVisual();
 325
 326     m_refData = new wxBitmapRefData();
 327
 328     GdkBitmap *mask = (GdkBitmap*) NULL;
 329
 330     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxGetRootWindow()->window, &mask, NULL, (gchar **) bits );
 331
 332     wxCHECK_MSG( M_BMPDATA->m_pixmap, false, wxT("couldn't create pixmap") );
 333
 334     if (mask)
 335     {
 336         M_BMPDATA->m_mask = new wxMask();
 337         M_BMPDATA->m_mask->m_bitmap = mask;
 338     }
 339
 340     gdk_drawable_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 341
 342     M_BMPDATA->m_bpp = visual->depth;  // Can we get a different depth from create_from_xpm_d() ?
 343
 344     return true;
 345 }
 346
 347 wxBitmap wxBitmap::Rescale( int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy )
 348 {
 349     wxCHECK_MSG( Ok(), wxNullBitmap, wxT("invalid bitmap") );
 350
 351     if (newy==M_BMPDATA->m_width && newy==M_BMPDATA->m_height)
 352         return *this;
 353
 354     int width = wxMax(newx, 1);
 355     int height = wxMax(newy, 1);
 356     width = wxMin(width, clipwidth);
 357     height = wxMin(height, clipheight);
 358
 359     wxBitmap bmp;
 360
 361     if (HasPixbuf())
 362     {
 363         bmp.SetWidth(width);
 364         bmp.SetHeight(height);
 365         bmp.SetDepth(GetDepth());
 366         bmp.SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 367                                      gdk_pixbuf_get_has_alpha(GetPixbuf()),
 368                                      8, width, height));
 369         gdk_pixbuf_scale(GetPixbuf(), bmp.GetPixbuf(),
 370                          0, 0, width, height,
 371                          clipx, clipy,
 372                          (double)newx/GetWidth(), (double)newy/GetHeight(),
 373                          GDK_INTERP_BILINEAR);
 374     }
 375     else
 376     {
 377         GdkImage *img = (GdkImage*) NULL;
 378         if (GetPixmap())
 379             img = gdk_image_get( GetPixmap(), 0, 0, GetWidth(), GetHeight() );
 380         else
 381             wxFAIL_MSG( wxT("Ill-formed bitmap") );
 382
 383         wxCHECK_MSG( img, wxNullBitmap, wxT("couldn't create image") );
 384
 385         int bpp = -1;
 386
 387
 388         GdkGC *gc = NULL;
 389         GdkPixmap *dstpix = NULL;
 390         if (GetDepth() != 1)
 391         {
 392             GdkVisual *visual = gdk_drawable_get_visual( GetPixmap() );
 393             if (visual == NULL)
 394                 visual = wxTheApp->GetGdkVisual();
 395
 396             bpp = visual->depth;
 397             bmp = wxBitmap(width,height,bpp);
 398             dstpix = bmp.GetPixmap();
 399             gc = gdk_gc_new( dstpix );
 400         }
 401
 402         char *dst = NULL;
 403         long dstbyteperline = 0;
 404
 405         if (GetDepth() == 1)
 406         {
 407             bpp = 1;
 408             dstbyteperline = width/8*M_BMPDATA->m_bpp;
 409             if (width*M_BMPDATA->m_bpp % 8 != 0)
 410                 dstbyteperline++;
 411             dst = (char*) malloc(dstbyteperline*height);
 412         }
 413
 414         // be careful to use the right scaling factor
 415         float scx = (float)M_BMPDATA->m_width/(float)newx;
 416         float scy = (float)M_BMPDATA->m_height/(float)newy;
 417         // prepare accel-tables
 418         int *tablex = (int *)calloc(width,sizeof(int));
 419         int *tabley = (int *)calloc(height,sizeof(int));
 420
 421         // accel table filled with clipped values
 422         for (int x = 0; x < width; x++)
 423             tablex[x] = (int) (scx * (x+clipx));
 424         for (int y = 0; y < height; y++)
 425             tabley[y] = (int) (scy * (y+clipy));
 426
 427         // Main rescaling routine starts here
 428         for (int h = 0; h < height; h++)
 429         {
 430             char outbyte = 0;
 431             int old_x = -1;
 432             guint32 old_pixval = 0;
 433
 434             for (int w = 0; w < width; w++)
 435             {
 436                 guint32 pixval;
 437                 int x = tablex[w];
 438                 if (x == old_x)
 439                     pixval = old_pixval;
 440                 else
 441                 {
 442                     pixval = gdk_image_get_pixel( img, x, tabley[h] );
 443                     old_pixval = pixval;
 444                     old_x = x;
 445                 }
 446
 447                 if ( dst )
 448                 {
 449                     if (!pixval)
 450                     {
 451                         char bit=1;
 452                         char shift = bit << (w % 8);
 453                         outbyte |= shift;
 454                     }
 455
 456                     if ((w+1)%8==0)
 457                     {
 458                         dst[h*dstbyteperline+w/8] = outbyte;
 459                         outbyte = 0;
 460                     }
 461                 }
 462                 else
 463                 {
 464                     GdkColor col;
 465                     col.pixel = pixval;
 466                     gdk_gc_set_foreground( gc, &col );
 467                     gdk_draw_point( dstpix, gc, w, h);
 468                 }
 469             }
 470
 471             // do not forget the last byte
 472             if ( dst && (width % 8 != 0) )
 473                 dst[h*dstbyteperline+width/8] = outbyte;
 474         }
 475
 476         g_object_unref (img);
 477         if (gc) g_object_unref (gc);
 478
 479         if ( dst )
 480         {
 481             bmp = wxBitmap( (const char *)dst, width, height, 1 );
 482             free( dst );
 483         }
 484
 485         if (GetMask())
 486         {
 487             dstbyteperline = width/8;
 488             if (width % 8 != 0)
 489                 dstbyteperline++;
 490             dst = (char*) malloc(dstbyteperline*height);
 491             img = gdk_image_get( GetMask()->GetBitmap(), 0, 0, GetWidth(), GetHeight() );
 492
 493             for (int h = 0; h < height; h++)
 494             {
 495                 char outbyte = 0;
 496                 int old_x = -1;
 497                 guint32 old_pixval = 0;
 498
 499                 for (int w = 0; w < width; w++)
 500                 {
 501                     guint32 pixval;
 502                     int x = tablex[w];
 503                     if (x == old_x)
 504                         pixval = old_pixval;
 505                     else
 506                     {
 507                         pixval = gdk_image_get_pixel( img, x, tabley[h] );
 508                         old_pixval = pixval;
 509                         old_x = x;
 510                     }
 511
 512                     if (pixval)
 513                     {
 514                         char bit=1;
 515                         char shift = bit << (w % 8);
 516                         outbyte |= shift;
 517                     }
 518
 519                     if ((w+1)%8 == 0)
 520                     {
 521                         dst[h*dstbyteperline+w/8] = outbyte;
 522                         outbyte = 0;
 523                     }
 524                 }
 525
 526                 // do not forget the last byte
 527                 if (width % 8 != 0)
 528                     dst[h*dstbyteperline+width/8] = outbyte;
 529             }
 530             wxMask* mask = new wxMask;
 531             mask->m_bitmap = gdk_bitmap_create_from_data( wxGetRootWindow()->window, (gchar *) dst, width, height );
 532             bmp.SetMask(mask);
 533
 534             free( dst );
 535             g_object_unref (img);
 536         }
 537
 538         free( tablex );
 539         free( tabley );
 540     }
 541
 542     return bmp;
 543 }
 544
 545 bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 546 {
 547     UnRef();
 548
 549     wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 550     wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 551
 552     if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
 553         return false;
 554
 555     m_refData = new wxBitmapRefData();
 556
 557     if (depth == 1)
 558     {
 559         return CreateFromImageAsBitmap(image);
 560     }
 561     else
 562     {
 563         if (image.HasAlpha())
 564             return CreateFromImageAsPixbuf(image);
 565
 566         return CreateFromImageAsPixmap(image);
 567     }
 568 }
 569
 570 // conversion to mono bitmap:
 571 bool wxBitmap::CreateFromImageAsBitmap(const wxImage& img)
 572 {
 573     // convert alpha channel to mask, if it is present:
 574     wxImage image(img);
 575     image.ConvertAlphaToMask();
 576
 577     int width = image.GetWidth();
 578     int height = image.GetHeight();
 579
 580     SetHeight( height );
 581     SetWidth( width );
 582
 583     SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 ) );
 584
 585     SetDepth( 1 );
 586
 587     GdkVisual *visual = wxTheApp->GetGdkVisual();
 588
 589     // Create picture image
 590
 591     unsigned char *data_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 592
 593     GdkImage *data_image =
 594         gdk_image_new_bitmap( visual, data_data, width, height );
 595
 596     // Create mask image
 597
 598     GdkImage *mask_image = (GdkImage*) NULL;
 599
 600     if (image.HasMask())
 601     {
 602         unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 603
 604         mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 605
 606         wxMask *mask = new wxMask();
 607         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 608
 609         SetMask( mask );
 610     }
 611
 612     int r_mask = image.GetMaskRed();
 613     int g_mask = image.GetMaskGreen();
 614     int b_mask = image.GetMaskBlue();
 615
 616     unsigned char* data = image.GetData();
 617
 618     int index = 0;
 619     for (int y = 0; y < height; y++)
 620     {
 621         for (int x = 0; x < width; x++)
 622         {
 623             int r = data[index];
 624             index++;
 625             int g = data[index];
 626             index++;
 627             int b = data[index];
 628             index++;
 629
 630             if (image.HasMask())
 631             {
 632                 if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 633                     gdk_image_put_pixel( mask_image, x, y, 1 );
 634                 else
 635                     gdk_image_put_pixel( mask_image, x, y, 0 );
 636             }
 637
 638             if ((r == 255) && (b == 255) && (g == 255))
 639                 gdk_image_put_pixel( data_image, x, y, 1 );
 640             else
 641                 gdk_image_put_pixel( data_image, x, y, 0 );
 642
 643         } // for
 644     }  // for
 645
 646     // Blit picture
 647
 648     GdkGC *data_gc = gdk_gc_new( GetPixmap() );
 649
 650     gdk_draw_image( GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
 651
 652     g_object_unref (data_image);
 653     g_object_unref (data_gc);
 654
 655     // Blit mask
 656
 657     if (image.HasMask())
 658     {
 659         GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 660
 661         gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 662
 663         g_object_unref (mask_image);
 664         g_object_unref (mask_gc);
 665     }
 666
 667     return true;
 668 }
 669
 670 // conversion to colour bitmap:
 671 bool wxBitmap::CreateFromImageAsPixmap(const wxImage& img)
 672 {
 673     // convert alpha channel to mask, if it is present:
 674     wxImage image(img);
 675     image.ConvertAlphaToMask();
 676
 677     int width = image.GetWidth();
 678     int height = image.GetHeight();
 679
 680     SetHeight( height );
 681     SetWidth( width );
 682
 683     SetPixmap( gdk_pixmap_new( wxGetRootWindow()->window, width, height, -1 ) );
 684
 685     GdkVisual *visual = wxTheApp->GetGdkVisual();
 686
 687     int bpp = visual->depth;
 688
 689     SetDepth( bpp );
 690
 691     GdkGC *gc = gdk_gc_new( GetPixmap() );
 692
 693     gdk_draw_rgb_image( GetPixmap(),
 694                         gc,
 695                         0, 0,
 696                         width, height,
 697                         GDK_RGB_DITHER_NONE,
 698                         image.GetData(),
 699                         width*3 );
 700
 701     g_object_unref (gc);
 702
 703     // Create mask image
 704
 705     GdkImage *mask_image = (GdkImage*) NULL;
 706
 707     if (!image.HasMask())
 708         return true;
 709
 710     unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
 711
 712     mask_image =  gdk_image_new_bitmap( visual, mask_data, width, height );
 713
 714     wxMask *mask = new wxMask();
 715     mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, width, height, 1 );
 716
 717     SetMask( mask );
 718
 719     int r_mask = image.GetMaskRed();
 720     int g_mask = image.GetMaskGreen();
 721     int b_mask = image.GetMaskBlue();
 722
 723     unsigned char* data = image.GetData();
 724
 725     int index = 0;
 726     for (int y = 0; y < height; y++)
 727     {
 728         for (int x = 0; x < width; x++)
 729         {
 730             int r = data[index];
 731             index++;
 732             int g = data[index];
 733             index++;
 734             int b = data[index];
 735             index++;
 736
 737             if ((r == r_mask) && (b == b_mask) && (g == g_mask))
 738                 gdk_image_put_pixel( mask_image, x, y, 1 );
 739             else
 740                 gdk_image_put_pixel( mask_image, x, y, 0 );
 741         } // for
 742     }  // for
 743
 744     // Blit mask
 745
 746     GdkGC *mask_gc = gdk_gc_new( GetMask()->GetBitmap() );
 747
 748     gdk_draw_image( GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
 749
 750     g_object_unref (mask_image);
 751     g_object_unref (mask_gc);
 752
 753     return true;
 754 }
 755
 756 bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 757 {
 758     int width = image.GetWidth();
 759     int height = image.GetHeight();
 760
 761     GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
 762                                        image.HasAlpha(),
 763                                        8 /* bits per sample */,
 764                                        width, height);
 765     if (!pixbuf)
 766         return false;
 767
 768     wxASSERT( image.HasAlpha() ); // for now
 769     wxASSERT( gdk_pixbuf_get_n_channels(pixbuf) == 4 );
 770     wxASSERT( gdk_pixbuf_get_width(pixbuf) == width );
 771     wxASSERT( gdk_pixbuf_get_height(pixbuf) == height );
 772
 773     M_BMPDATA->m_pixbuf = pixbuf;
 774     SetHeight(height);
 775     SetWidth(width);
 776     SetDepth(wxTheApp->GetGdkVisual()->depth);
 777
 778     // Copy the data:
 779     unsigned char *in = image.GetData();
 780     unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
 781     unsigned char *alpha = image.GetAlpha();
 782
 783     int rowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
 784
 785     for (int y = 0; y < height; y++, out += rowinc)
 786     {
 787         for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
 788         {
 789             out[0] = in[0];
 790             out[1] = in[1];
 791             out[2] = in[2];
 792             out[3] = *alpha;
 793         }
 794     }
 795
 796     return true;
 797 }
 798
 799 wxImage wxBitmap::ConvertToImage() const
 800 {
 801     wxImage image;
 802
 803     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 804
 805     image.Create(GetWidth(), GetHeight());
 806     unsigned char *data = image.GetData();
 807
 808     if (!data)
 809     {
 810         wxFAIL_MSG( wxT("couldn't create image") );
 811         return wxNullImage;
 812     }
 813
 814     if (HasPixbuf())
 815     {
 816         GdkPixbuf *pixbuf = GetPixbuf();
 817         wxASSERT( gdk_pixbuf_get_has_alpha(pixbuf) );
 818
 819         int w = GetWidth();
 820         int h = GetHeight();
 821
 822         image.SetAlpha();
 823
 824         unsigned char *alpha = image.GetAlpha();
 825         unsigned char *in = gdk_pixbuf_get_pixels(pixbuf);
 826         unsigned char *out = data;
 827         int rowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * w;
 828
 829         for (int y = 0; y < h; y++, in += rowinc)
 830         {
 831             for (int x = 0; x < w; x++, in += 4, out += 3, alpha++)
 832             {
 833                 out[0] = in[0];
 834                 out[1] = in[1];
 835                 out[2] = in[2];
 836                 *alpha = in[3];
 837             }
 838         }
 839     }
 840     else
 841     {
 842         // the colour used as transparent one in wxImage and the one it is
 843         // replaced with when it really occurs in the bitmap
 844         static const int MASK_RED = 1;
 845         static const int MASK_GREEN = 2;
 846         static const int MASK_BLUE = 3;
 847         static const int MASK_BLUE_REPLACEMENT = 2;
 848
 849         GdkImage *gdk_image = (GdkImage*) NULL;
 850
 851         if (HasPixmap())
 852         {
 853             gdk_image = gdk_image_get( GetPixmap(),
 854                                        0, 0,
 855                                        GetWidth(), GetHeight() );
 856         }
 857         else
 858         {
 859             wxFAIL_MSG( wxT("Ill-formed bitmap") );
 860         }
 861
 862         wxCHECK_MSG( gdk_image, wxNullImage, wxT("couldn't create image") );
 863
 864         GdkImage *gdk_image_mask = (GdkImage*) NULL;
 865         if (GetMask())
 866         {
 867             gdk_image_mask = gdk_image_get( GetMask()->GetBitmap(),
 868                                             0, 0,
 869                                             GetWidth(), GetHeight() );
 870
 871             image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
 872         }
 873
 874         int bpp = -1;
 875         int red_shift_right = 0;
 876         int green_shift_right = 0;
 877         int blue_shift_right = 0;
 878         int red_shift_left = 0;
 879         int green_shift_left = 0;
 880         int blue_shift_left = 0;
 881         bool use_shift = false;
 882
 883         if (GetDepth() != 1)
 884         {
 885             GdkVisual *visual = gdk_drawable_get_visual( GetPixmap() );
 886             if (visual == NULL)
 887                 visual = wxTheApp->GetGdkVisual();
 888
 889             bpp = visual->depth;
 890             if (bpp == 16)
 891                 bpp = visual->red_prec + visual->green_prec + visual->blue_prec;
 892             red_shift_right = visual->red_shift;
 893             red_shift_left = 8-visual->red_prec;
 894             green_shift_right = visual->green_shift;
 895             green_shift_left = 8-visual->green_prec;
 896             blue_shift_right = visual->blue_shift;
 897             blue_shift_left = 8-visual->blue_prec;
 898
 899             use_shift = (visual->type == GDK_VISUAL_TRUE_COLOR) || (visual->type == GDK_VISUAL_DIRECT_COLOR);
 900         }
 901         else
 902         {
 903             bpp = 1;
 904         }
 905
 906
 907         GdkColormap *cmap = gtk_widget_get_default_colormap();
 908
 909         long pos = 0;
 910         for (int j = 0; j < GetHeight(); j++)
 911         {
 912             for (int i = 0; i < GetWidth(); i++)
 913             {
 914                 wxUint32 pixel = gdk_image_get_pixel( gdk_image, i, j );
 915                 if (bpp == 1)
 916                 {
 917                     if (pixel == 0)
 918                     {
 919                         data[pos]   = 0;
 920                         data[pos+1] = 0;
 921                         data[pos+2] = 0;
 922                     }
 923                     else
 924                     {
 925                         data[pos]   = 255;
 926                         data[pos+1] = 255;
 927                         data[pos+2] = 255;
 928                     }
 929                 }
 930                 else if (use_shift)
 931                 {
 932                     data[pos] =   (pixel >> red_shift_right)   << red_shift_left;
 933                     data[pos+1] = (pixel >> green_shift_right) << green_shift_left;
 934                     data[pos+2] = (pixel >> blue_shift_right)  << blue_shift_left;
 935                 }
 936                 else if (cmap->colors)
 937                 {
 938                     data[pos] =   cmap->colors[pixel].red   >> 8;
 939                     data[pos+1] = cmap->colors[pixel].green >> 8;
 940                     data[pos+2] = cmap->colors[pixel].blue  >> 8;
 941                 }
 942                 else
 943                 {
 944                     wxFAIL_MSG( wxT("Image conversion failed. Unknown visual type.") );
 945                 }
 946
 947                 if (gdk_image_mask)
 948                 {
 949                     int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
 950                     if (mask_pixel == 0)
 951                     {
 952                         data[pos] = MASK_RED;
 953                         data[pos+1] = MASK_GREEN;
 954                         data[pos+2] = MASK_BLUE;
 955                     }
 956                     else if ( data[pos] == MASK_RED &&
 957                                 data[pos+1] == MASK_GREEN &&
 958                                     data[pos+2] == MASK_BLUE )
 959                     {
 960                         data[pos+2] = MASK_BLUE_REPLACEMENT;
 961                     }
 962                 }
 963
 964                 pos += 3;
 965             }
 966         }
 967
 968         g_object_unref (gdk_image);
 969         if (gdk_image_mask) g_object_unref (gdk_image_mask);
 970     }
 971
 972     return image;
 973 }
 974
 975 wxBitmap::wxBitmap( const wxString &filename, wxBitmapType type )
 976 {
 977     LoadFile( filename, type );
 978 }
 979
 980 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
 981 {
 982     if ( width > 0 && height > 0 )
 983     {
 984         m_refData = new wxBitmapRefData();
 985
 986         M_BMPDATA->m_mask = (wxMask *) NULL;
 987         M_BMPDATA->m_pixmap = gdk_bitmap_create_from_data
 988                               (
 989                                 wxGetRootWindow()->window,
 990                                 (gchar *) bits,
 991                                 width,
 992                                 height
 993                               );
 994         M_BMPDATA->m_width = width;
 995         M_BMPDATA->m_height = height;
 996         M_BMPDATA->m_bpp = 1;
 997
 998         wxASSERT_MSG( M_BMPDATA->m_pixmap, wxT("couldn't create bitmap") );
 999     }
1000 }
1001
1002 wxBitmap::~wxBitmap()
1003 {
1004 }
1005
1006 bool wxBitmap::operator == ( const wxBitmap& bmp ) const
1007 {
1008     return m_refData == bmp.m_refData;
1009 }
1010
1011 bool wxBitmap::operator != ( const wxBitmap& bmp ) const
1012 {
1013     return m_refData != bmp.m_refData;
1014 }
1015
1016 bool wxBitmap::Ok() const
1017 {
1018     return (m_refData != NULL) &&
1019            (
1020               M_BMPDATA->m_pixbuf ||
1021               M_BMPDATA->m_pixmap
1022            );
1023 }
1024
1025 int wxBitmap::GetHeight() const
1026 {
1027     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1028
1029     return M_BMPDATA->m_height;
1030 }
1031
1032 int wxBitmap::GetWidth() const
1033 {
1034     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1035
1036     return M_BMPDATA->m_width;
1037 }
1038
1039 int wxBitmap::GetDepth() const
1040 {
1041     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
1042
1043     return M_BMPDATA->m_bpp;
1044 }
1045
1046 wxMask *wxBitmap::GetMask() const
1047 {
1048     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
1049
1050     return M_BMPDATA->m_mask;
1051 }
1052
1053 void wxBitmap::SetMask( wxMask *mask )
1054 {
1055     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
1056
1057     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
1058
1059     M_BMPDATA->m_mask = mask;
1060 }
1061
1062 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
1063 {
1064     *this = icon;
1065     return true;
1066 }
1067
1068 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
1069 {
1070     wxCHECK_MSG( Ok() &&
1071                  (rect.x >= 0) && (rect.y >= 0) &&
1072                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
1073                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
1074
1075     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
1076     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
1077
1078     if (HasPixbuf())
1079     {
1080         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
1081                                            gdk_pixbuf_get_has_alpha(GetPixbuf()),
1082                                            8, rect.width, rect.height);
1083         ret.SetPixbuf(pixbuf);
1084         gdk_pixbuf_copy_area(GetPixbuf(),
1085                              rect.x, rect.y, rect.width, rect.height,
1086                              pixbuf, 0, 0);
1087     }
1088     else
1089     {
1090         if (ret.GetDepth() != 1)
1091         {
1092             GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1093             gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1094             g_object_unref (gc);
1095         }
1096         else
1097         {
1098             GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
1099             GdkColor col;
1100             col.pixel = 0xFFFFFF;
1101             gdk_gc_set_foreground( gc, &col );
1102             col.pixel = 0;
1103             gdk_gc_set_background( gc, &col );
1104             gdk_wx_draw_bitmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
1105             g_object_unref (gc);
1106         }
1107     }
1108
1109     if (GetMask())
1110     {
1111         wxMask *mask = new wxMask;
1112         mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
1113
1114         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
1115         GdkColor col;
1116         col.pixel = 0xFFFFFF;
1117         gdk_gc_set_foreground( gc, &col );
1118         col.pixel = 0;
1119         gdk_gc_set_background( gc, &col );
1120         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height );
1121         g_object_unref (gc);
1122
1123         ret.SetMask( mask );
1124     }
1125
1126     return ret;
1127 }
1128
1129 bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
1130 {
1131     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1132
1133     // Try to save the bitmap via wxImage handlers:
1134     {
1135         wxImage image = ConvertToImage();
1136         if (image.Ok()) return image.SaveFile( name, type );
1137     }
1138
1139     return false;
1140 }
1141
1142 bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
1143 {
1144     UnRef();
1145
1146     if (!wxFileExists(name))
1147         return false;
1148
1149     GdkVisual *visual = wxTheApp->GetGdkVisual();
1150
1151     if (type == wxBITMAP_TYPE_XPM)
1152     {
1153         m_refData = new wxBitmapRefData();
1154
1155         GdkBitmap *mask = (GdkBitmap*) NULL;
1156
1157         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm
1158                               (
1159                                 wxGetRootWindow()->window,
1160                                 &mask,
1161                                 NULL,
1162                                 name.fn_str()
1163                               );
1164
1165         if (mask)
1166         {
1167            M_BMPDATA->m_mask = new wxMask();
1168            M_BMPDATA->m_mask->m_bitmap = mask;
1169         }
1170
1171         gdk_drawable_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
1172
1173         M_BMPDATA->m_bpp = visual->depth;
1174     }
1175     else // try if wxImage can load it
1176     {
1177         wxImage image;
1178         if ( !image.LoadFile( name, type ) || !image.Ok() )
1179             return false;
1180
1181         *this = wxBitmap(image);
1182     }
1183
1184     return true;
1185 }
1186
1187 #if wxUSE_PALETTE
1188 wxPalette *wxBitmap::GetPalette() const
1189 {
1190     if (!Ok())
1191         return (wxPalette *) NULL;
1192
1193     return M_BMPDATA->m_palette;
1194 }
1195
1196 void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
1197 {
1198     // TODO
1199 }
1200 #endif // wxUSE_PALETTE
1201
1202 void wxBitmap::SetHeight( int height )
1203 {
1204     if (!m_refData)
1205         m_refData = new wxBitmapRefData();
1206
1207     M_BMPDATA->m_height = height;
1208 }
1209
1210 void wxBitmap::SetWidth( int width )
1211 {
1212     if (!m_refData)
1213         m_refData = new wxBitmapRefData();
1214
1215     M_BMPDATA->m_width = width;
1216 }
1217
1218 void wxBitmap::SetDepth( int depth )
1219 {
1220     if (!m_refData)
1221         m_refData = new wxBitmapRefData();
1222
1223     M_BMPDATA->m_bpp = depth;
1224 }
1225
1226 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
1227 {
1228     if (!m_refData)
1229         m_refData = new wxBitmapRefData();
1230
1231     M_BMPDATA->m_pixmap = pixmap;
1232     PurgeOtherRepresentations(Pixmap);
1233 }
1234
1235 GdkPixmap *wxBitmap::GetPixmap() const
1236 {
1237     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
1238
1239     // create the pixmap on the fly if we use Pixbuf representation:
1240     if (HasPixbuf() && !HasPixmap())
1241     {
1242         delete M_BMPDATA->m_mask;
1243         M_BMPDATA->m_mask = new wxMask();
1244         gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
1245                                           &M_BMPDATA->m_pixmap,
1246                                           &M_BMPDATA->m_mask->m_bitmap,
1247                                           128 /*threshold*/);
1248     }
1249
1250     return M_BMPDATA->m_pixmap;
1251 }
1252
1253 bool wxBitmap::HasPixmap() const
1254 {
1255     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1256
1257     return M_BMPDATA->m_pixmap != NULL;
1258 }
1259
1260 GdkPixbuf *wxBitmap::GetPixbuf() const
1261 {
1262     wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
1263
1264     if (HasPixmap() && !HasPixbuf())
1265     {
1266         int width = GetWidth();
1267         int height = GetHeight();
1268
1269         GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
1270                                            GetMask() != NULL,
1271                                            8, width, height);
1272         M_BMPDATA->m_pixbuf =
1273             gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
1274                                          0, 0, 0, 0, width, height);
1275
1276         // apply the mask to created pixbuf:
1277         if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
1278         {
1279             GdkPixbuf *pmask =
1280                 gdk_pixbuf_get_from_drawable(NULL,
1281                                              M_BMPDATA->m_mask->GetBitmap(),
1282                                              NULL,
1283                                              0, 0, 0, 0, width, height);
1284             if (pmask)
1285             {
1286                 guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
1287                 guchar *mask = gdk_pixbuf_get_pixels(pmask);
1288                 int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
1289                 int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
1290
1291                 for (int y = 0; y < height;
1292                      y++, bmp += bmprowinc, mask += maskrowinc)
1293                 {
1294                     for (int x = 0; x < width; x++, bmp += 4, mask += 3)
1295                     {
1296                         if (mask[0] == 0 /*black pixel*/)
1297                             bmp[3] = 0;
1298                     }
1299                 }
1300
1301                 g_object_unref (pmask);
1302             }
1303         }
1304     }
1305
1306     return M_BMPDATA->m_pixbuf;
1307 }
1308
1309 bool wxBitmap::HasPixbuf() const
1310 {
1311     wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
1312
1313     return M_BMPDATA->m_pixbuf != NULL;
1314 }
1315
1316 void wxBitmap::SetPixbuf( GdkPixbuf *pixbuf )
1317 {
1318     if (!m_refData)
1319         m_refData = new wxBitmapRefData();
1320
1321     M_BMPDATA->m_pixbuf = pixbuf;
1322     PurgeOtherRepresentations(Pixbuf);
1323 }
1324
1325 void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
1326 {
1327     if (keep == Pixmap && HasPixbuf())
1328     {
1329         g_object_unref (M_BMPDATA->m_pixbuf);
1330         M_BMPDATA->m_pixbuf = NULL;
1331     }
1332     if (keep == Pixbuf && HasPixmap())
1333     {
1334         g_object_unref (M_BMPDATA->m_pixmap);
1335         M_BMPDATA->m_pixmap = NULL;
1336     }
1337 }
1338
1339 void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
1340 {
1341     if (bpp != 32)
1342         return NULL;
1343
1344     GdkPixbuf *pixbuf = GetPixbuf();
1345     if (!pixbuf)
1346         return NULL;
1347
1348 #if 0
1349     if (gdk_pixbuf_get_has_alpha( pixbuf ))
1350         wxPrintf( wxT("Has alpha\n") );
1351     else
1352         wxPrintf( wxT("No alpha.\n") );
1353 #endif
1354
1355     data.m_height = gdk_pixbuf_get_height( pixbuf );
1356     data.m_width = gdk_pixbuf_get_width( pixbuf );
1357     data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
1358
1359     return gdk_pixbuf_get_pixels( pixbuf );
1360 }
1361
1362 void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
1363 {
1364 }
1365
1366
1367 bool wxBitmap::HasAlpha() const
1368 {
1369     return HasPixbuf();
1370 }
1371
1372 void wxBitmap::UseAlpha()
1373 {
1374     GetPixbuf();
1375 }
1376
1377 //-----------------------------------------------------------------------------
1378 // wxBitmapHandler
1379 //-----------------------------------------------------------------------------
1380
1381 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler,wxBitmapHandlerBase)
1382
1383 wxBitmapHandler::~wxBitmapHandler()
1384 {
1385 }
1386
1387 bool wxBitmapHandler::Create(wxBitmap * WXUNUSED(bitmap),
1388                              void * WXUNUSED(data),
1389                              long WXUNUSED(type),
1390                              int WXUNUSED(width),
1391                              int WXUNUSED(height),
1392                              int WXUNUSED(depth))
1393 {
1394     wxFAIL_MSG( _T("not implemented") );
1395
1396     return false;
1397 }
1398
1399 bool wxBitmapHandler::LoadFile(wxBitmap * WXUNUSED(bitmap),
1400                                const wxString& WXUNUSED(name),
1401                                long WXUNUSED(flags),
1402                                int WXUNUSED(desiredWidth),
1403                                int WXUNUSED(desiredHeight))
1404 {
1405     wxFAIL_MSG( _T("not implemented") );
1406
1407     return false;
1408 }
1409
1410 bool wxBitmapHandler::SaveFile(const wxBitmap * WXUNUSED(bitmap),
1411                                const wxString& WXUNUSED(name),
1412                                int WXUNUSED(type),
1413                                const wxPalette * WXUNUSED(palette))
1414 {
1415     wxFAIL_MSG( _T("not implemented") );
1416
1417     return false;
1418 }
1419
1420 /* static */ void wxBitmap::InitStandardHandlers()
1421 {
1422     // TODO: Insert handler based on GdkPixbufs handler later
1423 }