src/gtk/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #ifdef __GNUG__
  11 #pragma implementation "bitmap.h"
  12 #endif
  13
  14 #include "wx/bitmap.h"
  15 #include "wx/icon.h"
  16 #include "wx/filefn.h"
  17 #include "wx/image.h"
  18 #include "wx/dcmemory.h"
  19
  20 #include <gdk/gdk.h>
  21 #include <gdk/gdkprivate.h>
  22
  23 // in GTK+ 1.3 gdk_root_parent was renamed into gdk_parent_root
  24 #ifdef __WXGTK13__
  25     #define gdk_root_parent gdk_parent_root
  26 #else // GTK+ <= 1.2
  27     // need to get the declaration of gdk_root_parent from private header
  28     #include <gdk/gdkx.h>
  29 #endif // GTK+ 1.3/1.2
  30
  31 //-----------------------------------------------------------------------------
  32 // wxMask
  33 //-----------------------------------------------------------------------------
  34
  35 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  36
  37 wxMask::wxMask()
  38 {
  39     m_bitmap = (GdkBitmap *) NULL;
  40 }
  41
  42 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  43 {
  44     m_bitmap = (GdkBitmap *) NULL;
  45     Create( bitmap, colour );
  46 }
  47
  48 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  49 {
  50     m_bitmap = (GdkBitmap *) NULL;
  51     Create( bitmap, paletteIndex );
  52 }
  53
  54 wxMask::wxMask( const wxBitmap& bitmap )
  55 {
  56     m_bitmap = (GdkBitmap *) NULL;
  57     Create( bitmap );
  58 }
  59
  60 wxMask::~wxMask()
  61 {
  62     if (m_bitmap)
  63         gdk_bitmap_unref( m_bitmap );
  64 }
  65
  66 bool wxMask::Create( const wxBitmap& bitmap,
  67                      const wxColour& colour )
  68 {
  69     if (m_bitmap)
  70     {
  71         gdk_bitmap_unref( m_bitmap );
  72         m_bitmap = (GdkBitmap*) NULL;
  73     }
  74
  75     wxImage image( bitmap );
  76     if (!image.Ok()) return FALSE;
  77
  78     GdkWindow *parent = (GdkWindow*) &gdk_root_parent;
  79     m_bitmap = gdk_pixmap_new( parent, image.GetWidth(), image.GetHeight(), 1 );
  80     GdkGC *gc = gdk_gc_new( m_bitmap );
  81
  82     GdkColor color;
  83     color.red = 65000;
  84     color.green = 65000;
  85     color.blue = 65000;
  86     color.pixel = 1;
  87     gdk_gc_set_foreground( gc, &color );
  88     gdk_gc_set_fill( gc, GDK_SOLID );
  89     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
  90
  91     unsigned char *data = image.GetData();
  92     int index = 0;
  93
  94     unsigned char red = colour.Red();
  95     unsigned char green = colour.Green();
  96     unsigned char blue = colour.Blue();
  97
  98     GdkVisual *visual = gdk_visual_get_system();
  99     int bpp = visual->depth;
 100     if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15;
 101     if (bpp == 15)
 102     {
 103         red = red & 0xf8;
 104         blue = blue & 0xf8;
 105         green = green & 0xf8;
 106     }
 107     if (bpp == 16)
 108     {
 109         red = red & 0xf8;
 110         blue = blue & 0xfc;
 111         green = green & 0xf8;
 112     }
 113
 114     color.red = 0;
 115     color.green = 0;
 116     color.blue = 0;
 117     color.pixel = 0;
 118     gdk_gc_set_foreground( gc, &color );
 119
 120     for (int j = 0; j < image.GetHeight(); j++)
 121     {
 122         int start_x = -1;
 123         int i;
 124         for (i = 0; i < image.GetWidth(); i++)
 125         {
 126             if ((data[index] == red) &&
 127                 (data[index+1] == green) &&
 128                 (data[index+2] == blue))
 129             {
 130                 if (start_x == -1)
 131                 start_x = i;
 132             }
 133             else
 134             {
 135                 if (start_x != -1)
 136                 {
 137                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 138                     start_x = -1;
 139                 }
 140             }
 141             index += 3;
 142         }
 143         if (start_x != -1)
 144             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 145     }
 146
 147     gdk_gc_unref( gc );
 148
 149     return TRUE;
 150 }
 151
 152 bool wxMask::Create( const wxBitmap& WXUNUSED(bitmap),
 153                      int WXUNUSED(paletteIndex) )
 154 {
 155     if (m_bitmap)
 156     {
 157         gdk_bitmap_unref( m_bitmap );
 158         m_bitmap = (GdkBitmap*) NULL;
 159     }
 160
 161     wxFAIL_MSG( wxT("not implemented") );
 162
 163     return FALSE;
 164 }
 165
 166 bool wxMask::Create( const wxBitmap& bitmap )
 167 {
 168     if (m_bitmap)
 169     {
 170         gdk_bitmap_unref( m_bitmap );
 171         m_bitmap = (GdkBitmap*) NULL;
 172     }
 173
 174     if (!bitmap.Ok()) return FALSE;
 175
 176     wxCHECK_MSG( bitmap.GetBitmap(), FALSE, wxT("Cannot create mask from colour bitmap") );
 177
 178     m_bitmap = gdk_pixmap_new( (GdkWindow*) &gdk_root_parent, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 179
 180     if (!m_bitmap) return FALSE;
 181
 182     GdkGC *gc = gdk_gc_new( m_bitmap );
 183
 184     gdk_draw_bitmap( m_bitmap, gc, bitmap.GetBitmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
 185
 186     gdk_gc_unref( gc );
 187
 188     return TRUE;
 189 }
 190
 191 GdkBitmap *wxMask::GetBitmap() const
 192 {
 193     return m_bitmap;
 194 }
 195
 196 //-----------------------------------------------------------------------------
 197 // wxBitmap
 198 //-----------------------------------------------------------------------------
 199
 200 class wxBitmapRefData: public wxObjectRefData
 201 {
 202 public:
 203     wxBitmapRefData();
 204     ~wxBitmapRefData();
 205
 206     GdkPixmap      *m_pixmap;
 207     GdkBitmap      *m_bitmap;
 208     wxMask         *m_mask;
 209     int             m_width;
 210     int             m_height;
 211     int             m_bpp;
 212     wxPalette      *m_palette;
 213 };
 214
 215 wxBitmapRefData::wxBitmapRefData()
 216 {
 217     m_pixmap = (GdkPixmap *) NULL;
 218     m_bitmap = (GdkBitmap *) NULL;
 219     m_mask = (wxMask *) NULL;
 220     m_width = 0;
 221     m_height = 0;
 222     m_bpp = 0;
 223     m_palette = (wxPalette *) NULL;
 224 }
 225
 226 wxBitmapRefData::~wxBitmapRefData()
 227 {
 228     if (m_pixmap) gdk_pixmap_unref( m_pixmap );
 229     if (m_bitmap) gdk_bitmap_unref( m_bitmap );
 230     if (m_mask) delete m_mask;
 231     if (m_palette) delete m_palette;
 232 }
 233
 234 //-----------------------------------------------------------------------------
 235
 236 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 237
 238 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 239
 240 wxBitmap::wxBitmap()
 241 {
 242     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 243 }
 244
 245 wxBitmap::wxBitmap( int width, int height, int depth )
 246 {
 247     wxCHECK_RET( (width > 0) && (height > 0), wxT("invalid bitmap size") )
 248
 249     GdkWindow *parent = (GdkWindow*) &gdk_root_parent;
 250     if (depth == -1) depth = gdk_window_get_visual( parent )->depth;
 251
 252     wxCHECK_RET( (depth ==  gdk_window_get_visual( parent )->depth) ||
 253                  (depth == 1), wxT("invalid bitmap depth") )
 254
 255     m_refData = new wxBitmapRefData();
 256     M_BMPDATA->m_mask = (wxMask *) NULL;
 257     M_BMPDATA->m_width = width;
 258     M_BMPDATA->m_height = height;
 259     if (depth == 1)
 260     {
 261         M_BMPDATA->m_bitmap = gdk_pixmap_new( parent, width, height, 1 );
 262         M_BMPDATA->m_bpp = 1;
 263     }
 264     else
 265     {
 266         M_BMPDATA->m_pixmap = gdk_pixmap_new( parent, width, height, depth );
 267         M_BMPDATA->m_bpp = gdk_window_get_visual( parent )->depth;
 268     }
 269
 270     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 271 }
 272
 273 bool wxBitmap::CreateFromXpm( const char **bits )
 274 {
 275     wxCHECK_MSG( bits != NULL, FALSE, wxT("invalid bitmap data") )
 276
 277     m_refData = new wxBitmapRefData();
 278
 279     GdkBitmap *mask = (GdkBitmap*) NULL;
 280     GdkWindow *parent = (GdkWindow*) &gdk_root_parent;
 281
 282     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( parent, &mask, NULL, (gchar **) bits );
 283
 284     wxCHECK_MSG( M_BMPDATA->m_pixmap, FALSE, wxT("couldn't create pixmap") );
 285
 286     if (mask)
 287     {
 288         M_BMPDATA->m_mask = new wxMask();
 289         M_BMPDATA->m_mask->m_bitmap = mask;
 290     }
 291
 292     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 293
 294     M_BMPDATA->m_bpp = gdk_window_get_visual( parent )->depth;  // ?
 295     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 296
 297     return TRUE;
 298 }
 299
 300 wxBitmap::wxBitmap( const wxBitmap& bmp )
 301 {
 302     Ref( bmp );
 303
 304     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 305 }
 306
 307 wxBitmap::wxBitmap( const wxString &filename, int type )
 308 {
 309     LoadFile( filename, type );
 310
 311     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 312 }
 313
 314 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
 315 {
 316     m_refData = new wxBitmapRefData();
 317
 318     M_BMPDATA->m_mask = (wxMask *) NULL;
 319     M_BMPDATA->m_bitmap =
 320       gdk_bitmap_create_from_data( (GdkWindow*) &gdk_root_parent, (gchar *) bits, width, height );
 321     M_BMPDATA->m_width = width;
 322     M_BMPDATA->m_height = height;
 323     M_BMPDATA->m_bpp = 1;
 324
 325     wxCHECK_RET( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
 326
 327     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 328 }
 329
 330 wxBitmap::~wxBitmap()
 331 {
 332     if (wxTheBitmapList) wxTheBitmapList->DeleteObject(this);
 333 }
 334
 335 wxBitmap& wxBitmap::operator = ( const wxBitmap& bmp )
 336 {
 337     if (*this == bmp) return (*this);
 338     Ref( bmp );
 339     return *this;
 340 }
 341
 342 bool wxBitmap::operator == ( const wxBitmap& bmp )
 343 {
 344     return m_refData == bmp.m_refData;
 345 }
 346
 347 bool wxBitmap::operator != ( const wxBitmap& bmp )
 348 {
 349     return m_refData != bmp.m_refData;
 350 }
 351
 352 bool wxBitmap::Ok() const
 353 {
 354     return (m_refData != NULL);
 355 }
 356
 357 int wxBitmap::GetHeight() const
 358 {
 359     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 360
 361     return M_BMPDATA->m_height;
 362 }
 363
 364 int wxBitmap::GetWidth() const
 365 {
 366     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 367
 368     return M_BMPDATA->m_width;
 369 }
 370
 371 int wxBitmap::GetDepth() const
 372 {
 373     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 374
 375     return M_BMPDATA->m_bpp;
 376 }
 377
 378 wxMask *wxBitmap::GetMask() const
 379 {
 380     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 381
 382     return M_BMPDATA->m_mask;
 383 }
 384
 385 void wxBitmap::SetMask( wxMask *mask )
 386 {
 387     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 388
 389     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
 390
 391     M_BMPDATA->m_mask = mask;
 392 }
 393
 394 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 395 {
 396     wxCHECK_MSG( Ok() &&
 397                  (rect.x >= 0) && (rect.y >= 0) &&
 398                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
 399                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
 400
 401     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
 402     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 403
 404     if (ret.GetPixmap())
 405     {
 406         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
 407         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 408         gdk_gc_destroy( gc );
 409     }
 410     else
 411     {
 412         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
 413         gdk_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 414         gdk_gc_destroy( gc );
 415     }
 416
 417     if (GetMask())
 418     {
 419         wxMask *mask = new wxMask;
 420         GdkWindow *parent = (GdkWindow*) &gdk_root_parent;
 421         mask->m_bitmap = gdk_pixmap_new( parent, rect.width, rect.height, 1 );
 422
 423         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
 424         gdk_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, 0, 0, rect.x, rect.y, rect.width, rect.height );
 425         gdk_gc_destroy( gc );
 426
 427         ret.SetMask( mask );
 428     }
 429
 430     return ret;
 431 }
 432
 433 bool wxBitmap::SaveFile( const wxString &name, int type, wxPalette *WXUNUSED(palette) )
 434 {
 435     wxCHECK_MSG( Ok(), FALSE, wxT("invalid bitmap") );
 436
 437     // Try to save the bitmap via wxImage handlers:
 438     {
 439         wxImage image( *this );
 440         if (image.Ok()) return image.SaveFile( name, type );
 441     }
 442
 443     return FALSE;
 444 }
 445
 446 bool wxBitmap::LoadFile( const wxString &name, int type )
 447 {
 448     UnRef();
 449
 450     if (!wxFileExists(name)) return FALSE;
 451
 452     if (type == wxBITMAP_TYPE_XPM)
 453     {
 454         m_refData = new wxBitmapRefData();
 455
 456         GdkBitmap *mask = (GdkBitmap*) NULL;
 457         GdkWindow *parent = (GdkWindow*) &gdk_root_parent;
 458
 459         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm( parent, &mask, NULL, name.fn_str() );
 460
 461         if (mask)
 462         {
 463            M_BMPDATA->m_mask = new wxMask();
 464            M_BMPDATA->m_mask->m_bitmap = mask;
 465         }
 466
 467         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 468         M_BMPDATA->m_bpp = gdk_window_get_visual( parent )->depth;
 469     }
 470     else // try if wxImage can load it
 471     {
 472         wxImage image;
 473         if (!image.LoadFile( name, type )) return FALSE;
 474         if (image.Ok()) *this = image.ConvertToBitmap();
 475         else return FALSE;
 476     }
 477
 478     return TRUE;
 479 }
 480
 481 wxPalette *wxBitmap::GetPalette() const
 482 {
 483     if (!Ok()) return (wxPalette *) NULL;
 484
 485     return M_BMPDATA->m_palette;
 486 }
 487
 488 void wxBitmap::SetHeight( int height )
 489 {
 490     if (!m_refData) m_refData = new wxBitmapRefData();
 491
 492     M_BMPDATA->m_height = height;
 493 }
 494
 495 void wxBitmap::SetWidth( int width )
 496 {
 497     if (!m_refData) m_refData = new wxBitmapRefData();
 498
 499     M_BMPDATA->m_width = width;
 500 }
 501
 502 void wxBitmap::SetDepth( int depth )
 503 {
 504     if (!m_refData) m_refData = new wxBitmapRefData();
 505
 506     M_BMPDATA->m_bpp = depth;
 507 }
 508
 509 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 510 {
 511     if (!m_refData) m_refData = new wxBitmapRefData();
 512
 513     M_BMPDATA->m_pixmap = pixmap;
 514 }
 515
 516 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
 517 {
 518     if (!m_refData) m_refData = new wxBitmapRefData();
 519
 520     M_BMPDATA->m_bitmap = bitmap;
 521 }
 522
 523 GdkPixmap *wxBitmap::GetPixmap() const
 524 {
 525     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
 526
 527     return M_BMPDATA->m_pixmap;
 528 }
 529
 530 GdkBitmap *wxBitmap::GetBitmap() const
 531 {
 532     wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, wxT("invalid bitmap") );
 533
 534     return M_BMPDATA->m_bitmap;
 535 }