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 extern void gdk_wx_draw_bitmap     (GdkDrawable  *drawable,
  24                           GdkGC               *gc,
  25                           GdkDrawable  *src,
  26                           gint                xsrc,
  27                           gint                ysrc,
  28                           gint                xdest,
  29                           gint                ydest,
  30                           gint                width,
  31                           gint                height);
  32
  33 //-----------------------------------------------------------------------------
  34 // data
  35 //-----------------------------------------------------------------------------
  36
  37 extern GtkWidget *wxRootWindow;
  38
  39 //-----------------------------------------------------------------------------
  40 // wxMask
  41 //-----------------------------------------------------------------------------
  42
  43 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
  44
  45 wxMask::wxMask()
  46 {
  47     m_bitmap = (GdkBitmap *) NULL;
  48 }
  49
  50 wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )
  51 {
  52     m_bitmap = (GdkBitmap *) NULL;
  53     Create( bitmap, colour );
  54 }
  55
  56 wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
  57 {
  58     m_bitmap = (GdkBitmap *) NULL;
  59     Create( bitmap, paletteIndex );
  60 }
  61
  62 wxMask::wxMask( const wxBitmap& bitmap )
  63 {
  64     m_bitmap = (GdkBitmap *) NULL;
  65     Create( bitmap );
  66 }
  67
  68 wxMask::~wxMask()
  69 {
  70     if (m_bitmap)
  71         gdk_bitmap_unref( m_bitmap );
  72 }
  73
  74 bool wxMask::Create( const wxBitmap& bitmap,
  75                      const wxColour& colour )
  76 {
  77     if (m_bitmap)
  78     {
  79         gdk_bitmap_unref( m_bitmap );
  80         m_bitmap = (GdkBitmap*) NULL;
  81     }
  82
  83     wxImage image( bitmap );
  84     if (!image.Ok()) return FALSE;
  85
  86     m_bitmap = gdk_pixmap_new( wxRootWindow->window, image.GetWidth(), image.GetHeight(), 1 );
  87     GdkGC *gc = gdk_gc_new( m_bitmap );
  88
  89     GdkColor color;
  90     color.red = 65000;
  91     color.green = 65000;
  92     color.blue = 65000;
  93     color.pixel = 1;
  94     gdk_gc_set_foreground( gc, &color );
  95     gdk_gc_set_fill( gc, GDK_SOLID );
  96     gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
  97
  98     unsigned char *data = image.GetData();
  99     int index = 0;
 100
 101     unsigned char red = colour.Red();
 102     unsigned char green = colour.Green();
 103     unsigned char blue = colour.Blue();
 104
 105     GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
 106     wxASSERT( visual );
 107
 108     int bpp = visual->depth;
 109     if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15;
 110     if (bpp == 15)
 111     {
 112         red = red & 0xf8;
 113         green = green & 0xf8;
 114         blue = blue & 0xf8;
 115     }
 116     if (bpp == 16)
 117     {
 118         red = red & 0xf8;
 119         green = green & 0xfc;
 120         blue = blue & 0xf8;
 121     }
 122
 123     color.red = 0;
 124     color.green = 0;
 125     color.blue = 0;
 126     color.pixel = 0;
 127     gdk_gc_set_foreground( gc, &color );
 128
 129     for (int j = 0; j < image.GetHeight(); j++)
 130     {
 131         int start_x = -1;
 132         int i;
 133         for (i = 0; i < image.GetWidth(); i++)
 134         {
 135             if ((data[index] == red) &&
 136                 (data[index+1] == green) &&
 137                 (data[index+2] == blue))
 138             {
 139                 if (start_x == -1)
 140                 start_x = i;
 141             }
 142             else
 143             {
 144                 if (start_x != -1)
 145                 {
 146                     gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
 147                     start_x = -1;
 148                 }
 149             }
 150             index += 3;
 151         }
 152         if (start_x != -1)
 153             gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
 154     }
 155
 156     gdk_gc_unref( gc );
 157
 158     return TRUE;
 159 }
 160
 161 bool wxMask::Create( const wxBitmap& WXUNUSED(bitmap),
 162                      int WXUNUSED(paletteIndex) )
 163 {
 164     if (m_bitmap)
 165     {
 166         gdk_bitmap_unref( m_bitmap );
 167         m_bitmap = (GdkBitmap*) NULL;
 168     }
 169
 170     wxFAIL_MSG( wxT("not implemented") );
 171
 172     return FALSE;
 173 }
 174
 175 bool wxMask::Create( const wxBitmap& bitmap )
 176 {
 177     if (m_bitmap)
 178     {
 179         gdk_bitmap_unref( m_bitmap );
 180         m_bitmap = (GdkBitmap*) NULL;
 181     }
 182
 183     if (!bitmap.Ok()) return FALSE;
 184
 185     wxCHECK_MSG( bitmap.GetBitmap(), FALSE, wxT("Cannot create mask from colour bitmap") );
 186
 187     m_bitmap = gdk_pixmap_new( wxRootWindow->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
 188
 189     if (!m_bitmap) return FALSE;
 190
 191     GdkGC *gc = gdk_gc_new( m_bitmap );
 192
 193     gdk_wx_draw_bitmap( m_bitmap, gc, bitmap.GetBitmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
 194
 195     gdk_gc_unref( gc );
 196
 197     return TRUE;
 198 }
 199
 200 GdkBitmap *wxMask::GetBitmap() const
 201 {
 202     return m_bitmap;
 203 }
 204
 205 //-----------------------------------------------------------------------------
 206 // wxBitmap
 207 //-----------------------------------------------------------------------------
 208
 209 class wxBitmapRefData: public wxObjectRefData
 210 {
 211 public:
 212     wxBitmapRefData();
 213     ~wxBitmapRefData();
 214
 215     GdkPixmap      *m_pixmap;
 216     GdkBitmap      *m_bitmap;
 217     wxMask         *m_mask;
 218     int             m_width;
 219     int             m_height;
 220     int             m_bpp;
 221     wxPalette      *m_palette;
 222 };
 223
 224 wxBitmapRefData::wxBitmapRefData()
 225 {
 226     m_pixmap = (GdkPixmap *) NULL;
 227     m_bitmap = (GdkBitmap *) NULL;
 228     m_mask = (wxMask *) NULL;
 229     m_width = 0;
 230     m_height = 0;
 231     m_bpp = 0;
 232     m_palette = (wxPalette *) NULL;
 233 }
 234
 235 wxBitmapRefData::~wxBitmapRefData()
 236 {
 237     if (m_pixmap) gdk_pixmap_unref( m_pixmap );
 238     if (m_bitmap) gdk_bitmap_unref( m_bitmap );
 239     if (m_mask) delete m_mask;
 240     if (m_palette) delete m_palette;
 241 }
 242
 243 //-----------------------------------------------------------------------------
 244
 245 #define M_BMPDATA ((wxBitmapRefData *)m_refData)
 246
 247 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 248
 249 wxBitmap::wxBitmap()
 250 {
 251     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 252 }
 253
 254 wxBitmap::wxBitmap( int width, int height, int depth )
 255 {
 256     Create( width, height, depth );
 257
 258     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 259 }
 260
 261 bool wxBitmap::Create( int width, int height, int depth )
 262 {
 263     UnRef();
 264
 265     wxCHECK_MSG( (width > 0) && (height > 0), FALSE, wxT("invalid bitmap size") )
 266
 267     GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
 268     wxASSERT( visual );
 269
 270     if (depth == -1) depth = visual->depth;
 271
 272     wxCHECK_MSG( (depth == visual->depth) ||
 273                  (depth == 1), FALSE, wxT("invalid bitmap depth") )
 274
 275     m_refData = new wxBitmapRefData();
 276     M_BMPDATA->m_mask = (wxMask *) NULL;
 277     M_BMPDATA->m_width = width;
 278     M_BMPDATA->m_height = height;
 279     if (depth == 1)
 280     {
 281         M_BMPDATA->m_bitmap = gdk_pixmap_new( wxRootWindow->window, width, height, 1 );
 282         M_BMPDATA->m_bpp = 1;
 283     }
 284     else
 285     {
 286         M_BMPDATA->m_pixmap = gdk_pixmap_new( wxRootWindow->window, width, height, depth );
 287         M_BMPDATA->m_bpp = visual->depth;
 288     }
 289
 290     return Ok();
 291 }
 292 bool wxBitmap::CreateFromXpm( const char **bits )
 293 {
 294     wxCHECK_MSG( bits != NULL, FALSE, wxT("invalid bitmap data") )
 295
 296     GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
 297     wxASSERT( visual );
 298
 299     m_refData = new wxBitmapRefData();
 300
 301     GdkBitmap *mask = (GdkBitmap*) NULL;
 302
 303     M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxRootWindow->window, &mask, NULL, (gchar **) bits );
 304
 305     wxCHECK_MSG( M_BMPDATA->m_pixmap, FALSE, wxT("couldn't create pixmap") );
 306
 307     if (mask)
 308     {
 309         M_BMPDATA->m_mask = new wxMask();
 310         M_BMPDATA->m_mask->m_bitmap = mask;
 311     }
 312
 313     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 314
 315     M_BMPDATA->m_bpp = visual->depth;  // ?
 316
 317     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 318
 319     return TRUE;
 320 }
 321
 322 wxBitmap::wxBitmap( const wxBitmap& bmp )
 323 {
 324     Ref( bmp );
 325
 326     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 327 }
 328
 329 wxBitmap::wxBitmap( const wxString &filename, int type )
 330 {
 331     LoadFile( filename, type );
 332
 333     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 334 }
 335
 336 wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
 337 {
 338     m_refData = new wxBitmapRefData();
 339
 340     M_BMPDATA->m_mask = (wxMask *) NULL;
 341     M_BMPDATA->m_bitmap =
 342       gdk_bitmap_create_from_data( wxRootWindow->window, (gchar *) bits, width, height );
 343     M_BMPDATA->m_width = width;
 344     M_BMPDATA->m_height = height;
 345     M_BMPDATA->m_bpp = 1;
 346
 347     wxCHECK_RET( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );
 348
 349     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 350 }
 351
 352 wxBitmap::~wxBitmap()
 353 {
 354     if (wxTheBitmapList) wxTheBitmapList->DeleteObject(this);
 355 }
 356
 357 wxBitmap& wxBitmap::operator = ( const wxBitmap& bmp )
 358 {
 359     if (*this == bmp) return (*this);
 360     Ref( bmp );
 361     return *this;
 362 }
 363
 364 bool wxBitmap::operator == ( const wxBitmap& bmp ) const
 365 {
 366     return m_refData == bmp.m_refData;
 367 }
 368
 369 bool wxBitmap::operator != ( const wxBitmap& bmp ) const
 370 {
 371     return m_refData != bmp.m_refData;
 372 }
 373
 374 bool wxBitmap::Ok() const
 375 {
 376     return (m_refData != NULL);
 377 }
 378
 379 int wxBitmap::GetHeight() const
 380 {
 381     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 382
 383     return M_BMPDATA->m_height;
 384 }
 385
 386 int wxBitmap::GetWidth() const
 387 {
 388     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 389
 390     return M_BMPDATA->m_width;
 391 }
 392
 393 int wxBitmap::GetDepth() const
 394 {
 395     wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
 396
 397     return M_BMPDATA->m_bpp;
 398 }
 399
 400 wxMask *wxBitmap::GetMask() const
 401 {
 402     wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 403
 404     return M_BMPDATA->m_mask;
 405 }
 406
 407 void wxBitmap::SetMask( wxMask *mask )
 408 {
 409     wxCHECK_RET( Ok(), wxT("invalid bitmap") );
 410
 411     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
 412
 413     M_BMPDATA->m_mask = mask;
 414 }
 415
 416 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 417 {
 418     wxCHECK_MSG( Ok() &&
 419                  (rect.x >= 0) && (rect.y >= 0) &&
 420                  (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
 421                  wxNullBitmap, wxT("invalid bitmap or bitmap region") );
 422
 423     wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
 424     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 425
 426     if (ret.GetPixmap())
 427     {
 428         GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
 429         gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 430         gdk_gc_destroy( gc );
 431     }
 432     else
 433     {
 434         GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
 435         gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
 436         gdk_gc_destroy( gc );
 437     }
 438
 439     if (GetMask())
 440     {
 441         wxMask *mask = new wxMask;
 442         mask->m_bitmap = gdk_pixmap_new( wxRootWindow->window, rect.width, rect.height, 1 );
 443
 444         GdkGC *gc = gdk_gc_new( mask->m_bitmap );
 445         gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, 0, 0, rect.x, rect.y, rect.width, rect.height );
 446         gdk_gc_destroy( gc );
 447
 448         ret.SetMask( mask );
 449     }
 450
 451     return ret;
 452 }
 453
 454 bool wxBitmap::SaveFile( const wxString &name, int type, wxPalette *WXUNUSED(palette) )
 455 {
 456     wxCHECK_MSG( Ok(), FALSE, wxT("invalid bitmap") );
 457
 458     // Try to save the bitmap via wxImage handlers:
 459     {
 460         wxImage image( *this );
 461         if (image.Ok()) return image.SaveFile( name, type );
 462     }
 463
 464     return FALSE;
 465 }
 466
 467 bool wxBitmap::LoadFile( const wxString &name, int type )
 468 {
 469     UnRef();
 470
 471     if (!wxFileExists(name)) return FALSE;
 472
 473     GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
 474     wxASSERT( visual );
 475
 476     if (type == wxBITMAP_TYPE_XPM)
 477     {
 478         m_refData = new wxBitmapRefData();
 479
 480         GdkBitmap *mask = (GdkBitmap*) NULL;
 481
 482         M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm( wxRootWindow->window, &mask, NULL, name.fn_str() );
 483
 484         if (mask)
 485         {
 486            M_BMPDATA->m_mask = new wxMask();
 487            M_BMPDATA->m_mask->m_bitmap = mask;
 488         }
 489
 490         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 491
 492         M_BMPDATA->m_bpp = visual->depth;
 493     }
 494     else // try if wxImage can load it
 495     {
 496         wxImage image;
 497         if (!image.LoadFile( name, type )) return FALSE;
 498         if (image.Ok()) *this = image.ConvertToBitmap();
 499         else return FALSE;
 500     }
 501
 502     return TRUE;
 503 }
 504
 505 wxPalette *wxBitmap::GetPalette() const
 506 {
 507     if (!Ok()) return (wxPalette *) NULL;
 508
 509     return M_BMPDATA->m_palette;
 510 }
 511
 512 void wxBitmap::SetHeight( int height )
 513 {
 514     if (!m_refData) m_refData = new wxBitmapRefData();
 515
 516     M_BMPDATA->m_height = height;
 517 }
 518
 519 void wxBitmap::SetWidth( int width )
 520 {
 521     if (!m_refData) m_refData = new wxBitmapRefData();
 522
 523     M_BMPDATA->m_width = width;
 524 }
 525
 526 void wxBitmap::SetDepth( int depth )
 527 {
 528     if (!m_refData) m_refData = new wxBitmapRefData();
 529
 530     M_BMPDATA->m_bpp = depth;
 531 }
 532
 533 void wxBitmap::SetPixmap( GdkPixmap *pixmap )
 534 {
 535     if (!m_refData) m_refData = new wxBitmapRefData();
 536
 537     M_BMPDATA->m_pixmap = pixmap;
 538 }
 539
 540 void wxBitmap::SetBitmap( GdkPixmap *bitmap )
 541 {
 542     if (!m_refData) m_refData = new wxBitmapRefData();
 543
 544     M_BMPDATA->m_bitmap = bitmap;
 545 }
 546
 547 GdkPixmap *wxBitmap::GetPixmap() const
 548 {
 549     wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
 550
 551     return M_BMPDATA->m_pixmap;
 552 }
 553
 554 GdkBitmap *wxBitmap::GetBitmap() const
 555 {
 556     wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, wxT("invalid bitmap") );
 557
 558     return M_BMPDATA->m_bitmap;
 559 }