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 <gtk/gtk.h>
  22
  23 //-----------------------------------------------------------------------------
  24 // data
  25 //-----------------------------------------------------------------------------
  26
  27 extern GtkWidget *wxRootWindow;
  28
  29 //-----------------------------------------------------------------------------
  30 // wxMask
  31 //-----------------------------------------------------------------------------
  32
  33 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  34
  35 wxMask::wxMask()
  36 {
  37     m_bitmap = (GdkBitmap *) NULL;
  38 }
  39
  40 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  41 {
  42     m_bitmap = (GdkBitmap *) NULL;
  43     Create( bitmap, colour );
  44 }
  45
  46 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  47 {
  48     m_bitmap = (GdkBitmap *) NULL;
  49     Create( bitmap, paletteIndex );
  50 }
  51
  52 wxMask::wxMask( const wxBitmap& bitmap )
  53 {
  54     m_bitmap = (GdkBitmap *) NULL;
  55     Create( bitmap );
  56 }
  57
  58 wxMask::~wxMask()
  59 {
  60     if (m_bitmap)
  61         gdk_bitmap_unref( m_bitmap );
  62 }
  63
  64 bool wxMask::Create( const wxBitmap& bitmap,
  65                      const wxColour& colour )
  66 {
  67     if (m_bitmap)
  68     {
  69         gdk_bitmap_unref( m_bitmap );
  70         m_bitmap = (GdkBitmap*) NULL;
  71     }
  72
  73     wxImage image( bitmap );
  74     if (!image.Ok()) return FALSE;
  75
  76     m_bitmap = gdk_pixmap_new( wxRootWindow->window, image.GetWidth(), image.GetHeight(), 1 );
  77     GdkGC *gc = gdk_gc_new( m_bitmap );
  78
  79     GdkColor color;
  80     color.red = 65000;
  81     color.green = 65000;
  82     color.blue = 65000;
  83     color.pixel = 1;
  84     gdk_gc_set_foreground( gc, &color );
  85     gdk_gc_set_fill( gc, GDK_SOLID );
  86     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
  87
  88     unsigned char *data = image.GetData();
  89     int index = 0;
  90
  91     unsigned char red = colour.Red();
  92     unsigned char green = colour.Green();
  93     unsigned char blue = colour.Blue();
  94
  95     GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
  96     wxASSERT( visual );
  97
  98     int bpp = visual->depth;
  99     if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15;
 100     if (bpp == 15)
 101     {
 102         red = red & 0xf8;
 103         blue = blue & 0xf8;
 104         green = green & 0xf8;
 105     }
 106     if (bpp == 16)
 107     {
 108         red = red & 0xf8;
 109         blue = blue & 0xfc;
 110         green = green & 0xf8;
 111     }
 112
 113     color.red = 0;
 114     color.green = 0;
 115     color.blue = 0;
 116     color.pixel = 0;
 117     gdk_gc_set_foreground( gc, &color );
 118
 119     for (int j = 0; j < image.GetHeight(); j++)
 120     {
 121         int start_x = -1;
 122         int i;
 123         for (i = 0; i < image.GetWidth(); i++)
 124         {
 125             if ((data[index] == red) &&
 126                 (data[index+1] == green) &&
 127                 (data[index+2] == blue))
 128             {
 129                 if (start_x == -1)
 130                 start_x = i;
 131             }
 132             else
 133             {
 134                 if (start_x != -1)
 135                 {
 136                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 137                     start_x = -1;
 138                 }
 139             }
 140             index += 3;
 141         }
 142         if (start_x != -1)
 143             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 144     }
 145
 146     gdk_gc_unref( gc );
 147
 148     return TRUE;
 149 }
 150
 151 bool wxMask::Create( const wxBitmap& WXUNUSED(bitmap),
 152                      int WXUNUSED(paletteIndex) )
 153 {
 154     if (m_bitmap)
 155     {
 156         gdk_bitmap_unref( m_bitmap );
 157         m_bitmap = (GdkBitmap*) NULL;
 158     }
 159
 160     wxFAIL_MSG( wxT("not implemented") );
 161
 162     return FALSE;
 163 }
 164
 165 bool wxMask::Create( const wxBitmap& bitmap )
 166 {
 167     if (m_bitmap)
 168     {
 169         gdk_bitmap_unref( m_bitmap );
 170         m_bitmap = (GdkBitmap*) NULL;
 171     }
 172
 173     if (!bitmap.Ok()) return FALSE;
 174
 175     wxCHECK_MSG( bitmap.GetBitmap(), FALSE, wxT("Cannot create mask from colour bitmap") );
 176
 177     m_bitmap = gdk_pixmap_new( wxRootWindow->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 178
 179     if (!m_bitmap) return FALSE;
 180
 181     GdkGC *gc = gdk_gc_new( m_bitmap );
 182
 183     gdk_draw_bitmap( m_bitmap, gc, bitmap.GetBitmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
 184
 185     gdk_gc_unref( gc );
 186
 187     return TRUE;
 188 }
 189
 190 GdkBitmap *wxMask::GetBitmap() const
 191 {
 192     return m_bitmap;
 193 }
 194
 195 //-----------------------------------------------------------------------------
 196 // wxBitmap
 197 //-----------------------------------------------------------------------------
 198
 199 class wxBitmapRefData: public wxObjectRefData
 200 {
 201 public:
 202     wxBitmapRefData();
 203     ~wxBitmapRefData();
 204
 205     GdkPixmap      *m_pixmap;
 206     GdkBitmap      *m_bitmap;
 207     wxMask         *m_mask;
 208     int             m_width;
 209     int             m_height;
 210     int             m_bpp;
 211     wxPalette      *m_palette;
 212 };
 213
 214 wxBitmapRefData::wxBitmapRefData()
 215 {
 216     m_pixmap = (GdkPixmap *) NULL;
 217     m_bitmap = (GdkBitmap *) NULL;
 218     m_mask = (wxMask *) NULL;
 219     m_width = 0;
 220     m_height = 0;
 221     m_bpp = 0;
 222     m_palette = (wxPalette *) NULL;
 223 }
 224
 225 wxBitmapRefData::~wxBitmapRefData()
 226 {
 227     if (m_pixmap) gdk_pixmap_unref( m_pixmap );
 228     if (m_bitmap) gdk_bitmap_unref( m_bitmap );
 229     if (m_mask) delete m_mask;
 230     if (m_palette) delete m_palette;
 231 }
 232
 233 //-----------------------------------------------------------------------------
 234
 235 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 236
 237 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 238
 239 wxBitmap::wxBitmap()
 240 {
 241     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 242 }
 243
 244 wxBitmap::wxBitmap( int width, int height, int depth )
 245 {
 246     Create( width, height, depth );
 247
 248     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 249 }
 250
 251 bool wxBitmap::Create( int width, int height, int depth )
 252 {
 253     UnRef();
 254
 255     wxCHECK_MSG( (width > 0) && (height > 0), FALSE, wxT("invalid bitmap size") )
 256
 257     GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
 258     wxASSERT( visual );
 259
 260     if (depth == -1) depth = visual->depth;
 261
 262     wxCHECK_MSG( (depth == visual->depth) ||
 263                  (depth == 1), FALSE, wxT("invalid bitmap depth") )
 264
 265     m_refData = new wxBitmapRefData();
 266     M_BMPDATA->m_mask = (wxMask *) NULL;
 267     M_BMPDATA->m_width = width;
 268     M_BMPDATA->m_height = height;
 269     if (depth == 1)
 270     {
 271         M_BMPDATA->m_bitmap = gdk_pixmap_new( wxRootWindow->window, width, height, 1 );
 272         M_BMPDATA->m_bpp = 1;
 273     }
 274     else
 275     {
 276         M_BMPDATA->m_pixmap = gdk_pixmap_new( wxRootWindow->window, width, height, depth );
 277         M_BMPDATA->m_bpp = visual->depth;
 278     }
 279
 280     return Ok();
 281 }
 282 bool wxBitmap::CreateFromXpm( const char **bits )
 283 {
 284     wxCHECK_MSG( bits != NULL, FALSE, wxT("invalid bitmap data") )
 285
 286     GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
 287     wxASSERT( visual );
 288
 289     m_refData = new wxBitmapRefData();
 290
 291     GdkBitmap *mask = (GdkBitmap*) NULL;
 292
 293     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxRootWindow->window, &mask, NULL, (gchar **) bits );
 294
 295     wxCHECK_MSG( M_BMPDATA->m_pixmap, FALSE, wxT("couldn't create pixmap") );
 296
 297     if (mask)
 298     {
 299         M_BMPDATA->m_mask = new wxMask();
 300         M_BMPDATA->m_mask->m_bitmap = mask;
 301     }
 302
 303     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 304
 305     M_BMPDATA->m_bpp = visual->depth;  // ?
 306
 307     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 308
 309     return TRUE;
 310 }
 311
 312 wxBitmap::wxBitmap( const wxBitmap& bmp )
 313 {
 314     Ref( bmp );
 315
 316     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 317 }
 318
 319 wxBitmap::wxBitmap( const wxString &filename, int type )
 320 {
 321     LoadFile( filename, type );
 322
 323     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 324 }
 325
 326 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
 327 {
 328     m_refData = new wxBitmapRefData();
 329
 330     M_BMPDATA->m_mask = (wxMask *) NULL;
 331     M_BMPDATA->m_bitmap =
 332       gdk_bitmap_create_from_data( wxRootWindow->window, (gchar *) bits, width, height );
 333     M_BMPDATA->m_width = width;
 334     M_BMPDATA->m_height = height;
 335     M_BMPDATA->m_bpp = 1;
 336
 337     wxCHECK_RET( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
 338
 339     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 340 }
 341
 342 wxBitmap::~wxBitmap()
 343 {
 344     if (wxTheBitmapList) wxTheBitmapList->DeleteObject(this);
 345 }
 346
 347 wxBitmap& wxBitmap::operator = ( const wxBitmap& bmp )
 348 {
 349     if (*this == bmp) return (*this);
 350     Ref( bmp );
 351     return *this;
 352 }
 353
 354 bool wxBitmap::operator == ( const wxBitmap& bmp )
 355 {
 356     return m_refData == bmp.m_refData;
 357 }
 358
 359 bool wxBitmap::operator != ( const wxBitmap& bmp )
 360 {
 361     return m_refData != bmp.m_refData;
 362 }
 363
 364 bool wxBitmap::Ok() const
 365 {
 366     return (m_refData != NULL);
 367 }
 368
 369 int wxBitmap::GetHeight() const
 370 {
 371     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 372
 373     return M_BMPDATA->m_height;
 374 }
 375
 376 int wxBitmap::GetWidth() const
 377 {
 378     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 379
 380     return M_BMPDATA->m_width;
 381 }
 382
 383 int wxBitmap::GetDepth() const
 384 {
 385     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 386
 387     return M_BMPDATA->m_bpp;
 388 }
 389
 390 wxMask *wxBitmap::GetMask() const
 391 {
 392     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 393
 394     return M_BMPDATA->m_mask;
 395 }
 396
 397 void wxBitmap::SetMask( wxMask *mask )
 398 {
 399     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 400
 401     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
 402
 403     M_BMPDATA->m_mask = mask;
 404 }
 405
 406 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 407 {
 408     wxCHECK_MSG( Ok() &&
 409                  (rect.x >= 0) && (rect.y >= 0) &&
 410                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
 411                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
 412
 413     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
 414     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 415
 416     if (ret.GetPixmap())
 417     {
 418         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
 419         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 420         gdk_gc_destroy( gc );
 421     }
 422     else
 423     {
 424         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
 425         gdk_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 426         gdk_gc_destroy( gc );
 427     }
 428
 429     if (GetMask())
 430     {
 431         wxMask *mask = new wxMask;
 432         mask->m_bitmap = gdk_pixmap_new( wxRootWindow->window, rect.width, rect.height, 1 );
 433
 434         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
 435         gdk_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, 0, 0, rect.x, rect.y, rect.width, rect.height );
 436         gdk_gc_destroy( gc );
 437
 438         ret.SetMask( mask );
 439     }
 440
 441     return ret;
 442 }
 443
 444 bool wxBitmap::SaveFile( const wxString &name, int type, wxPalette *WXUNUSED(palette) )
 445 {
 446     wxCHECK_MSG( Ok(), FALSE, wxT("invalid bitmap") );
 447
 448     // Try to save the bitmap via wxImage handlers:
 449     {
 450         wxImage image( *this );
 451         if (image.Ok()) return image.SaveFile( name, type );
 452     }
 453
 454     return FALSE;
 455 }
 456
 457 bool wxBitmap::LoadFile( const wxString &name, int type )
 458 {
 459     UnRef();
 460
 461     if (!wxFileExists(name)) return FALSE;
 462
 463     GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
 464     wxASSERT( visual );
 465
 466     if (type == wxBITMAP_TYPE_XPM)
 467     {
 468         m_refData = new wxBitmapRefData();
 469
 470         GdkBitmap *mask = (GdkBitmap*) NULL;
 471
 472         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm( wxRootWindow->window, &mask, NULL, name.fn_str() );
 473
 474         if (mask)
 475         {
 476            M_BMPDATA->m_mask = new wxMask();
 477            M_BMPDATA->m_mask->m_bitmap = mask;
 478         }
 479
 480         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 481
 482         M_BMPDATA->m_bpp = visual->depth;
 483     }
 484     else // try if wxImage can load it
 485     {
 486         wxImage image;
 487         if (!image.LoadFile( name, type )) return FALSE;
 488         if (image.Ok()) *this = image.ConvertToBitmap();
 489         else return FALSE;
 490     }
 491
 492     return TRUE;
 493 }
 494
 495 wxPalette *wxBitmap::GetPalette() const
 496 {
 497     if (!Ok()) return (wxPalette *) NULL;
 498
 499     return M_BMPDATA->m_palette;
 500 }
 501
 502 void wxBitmap::SetHeight( int height )
 503 {
 504     if (!m_refData) m_refData = new wxBitmapRefData();
 505
 506     M_BMPDATA->m_height = height;
 507 }
 508
 509 void wxBitmap::SetWidth( int width )
 510 {
 511     if (!m_refData) m_refData = new wxBitmapRefData();
 512
 513     M_BMPDATA->m_width = width;
 514 }
 515
 516 void wxBitmap::SetDepth( int depth )
 517 {
 518     if (!m_refData) m_refData = new wxBitmapRefData();
 519
 520     M_BMPDATA->m_bpp = depth;
 521 }
 522
 523 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 524 {
 525     if (!m_refData) m_refData = new wxBitmapRefData();
 526
 527     M_BMPDATA->m_pixmap = pixmap;
 528 }
 529
 530 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
 531 {
 532     if (!m_refData) m_refData = new wxBitmapRefData();
 533
 534     M_BMPDATA->m_bitmap = bitmap;
 535 }
 536
 537 GdkPixmap *wxBitmap::GetPixmap() const
 538 {
 539     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
 540
 541     return M_BMPDATA->m_pixmap;
 542 }
 543
 544 GdkBitmap *wxBitmap::GetBitmap() const
 545 {
 546     wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, wxT("invalid bitmap") );
 547
 548     return M_BMPDATA->m_bitmap;
 549 }