src/gtk/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcclient.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Markus Holzem, Chris Breeze
   7 // Licence:           wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "dcclient.h"
  12 #endif
  13
  14 #include "wx/dcclient.h"
  15 #include "wx/dcmemory.h"
  16 #include "wx/image.h"
  17 #include <math.h>               // for floating-point functions
  18
  19 #include "gdk/gdk.h"
  20 #include "gtk/gtk.h"
  21
  22 //-----------------------------------------------------------------------------
  23 // local data
  24 //-----------------------------------------------------------------------------
  25
  26 #include "bdiag.xbm"
  27 #include "fdiag.xbm"
  28 #include "cdiag.xbm"
  29 #include "horiz.xbm"
  30 #include "verti.xbm"
  31 #include "cross.xbm"
  32 #define  num_hatches 6
  33
  34 static GdkPixmap  *hatches[num_hatches];
  35 static GdkPixmap **hatch_bitmap = (GdkPixmap **) NULL;
  36
  37 //-----------------------------------------------------------------------------
  38 // constants
  39 //-----------------------------------------------------------------------------
  40
  41 #define RAD2DEG 57.2957795131
  42
  43 //-----------------------------------------------------------------------------
  44 // temporary implementation of the missing GDK function
  45 //-----------------------------------------------------------------------------
  46
  47 #include "gdk/gdkprivate.h"
  48
  49 void gdk_draw_bitmap     (GdkDrawable  *drawable,
  50                           GdkGC               *gc,
  51                           GdkDrawable  *src,
  52                           gint                xsrc,
  53                           gint                ysrc,
  54                           gint                xdest,
  55                           gint                ydest,
  56                           gint                width,
  57                           gint                height)
  58 {
  59     GdkWindowPrivate *drawable_private;
  60     GdkWindowPrivate *src_private;
  61     GdkGCPrivate *gc_private;
  62
  63     g_return_if_fail (drawable != NULL);
  64     g_return_if_fail (src != NULL);
  65     g_return_if_fail (gc != NULL);
  66
  67     drawable_private = (GdkWindowPrivate*) drawable;
  68     src_private = (GdkWindowPrivate*) src;
  69     if (drawable_private->destroyed || src_private->destroyed)
  70         return;
  71
  72     gc_private = (GdkGCPrivate*) gc;
  73
  74     if (width == -1) width = src_private->width;
  75     if (height == -1) height = src_private->height;
  76
  77     XCopyPlane( drawable_private->xdisplay,
  78                 src_private->xwindow,
  79                 drawable_private->xwindow,
  80                 gc_private->xgc,
  81                 xsrc, ysrc,
  82                 width, height,
  83                 xdest, ydest,
  84                 1 );
  85 }
  86
  87 //-----------------------------------------------------------------------------
  88 // wxWindowDC
  89 //-----------------------------------------------------------------------------
  90
  91 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  92
  93 wxWindowDC::wxWindowDC()
  94 {
  95     m_penGC = (GdkGC *) NULL;
  96     m_brushGC = (GdkGC *) NULL;
  97     m_textGC = (GdkGC *) NULL;
  98     m_bgGC = (GdkGC *) NULL;
  99     m_cmap = (GdkColormap *) NULL;
 100     m_isMemDC = FALSE;
 101     m_owner = (wxWindow *)NULL;
 102 }
 103
 104 wxWindowDC::wxWindowDC( wxWindow *window )
 105 {
 106     m_penGC = (GdkGC *) NULL;
 107     m_brushGC = (GdkGC *) NULL;
 108     m_textGC = (GdkGC *) NULL;
 109     m_bgGC = (GdkGC *) NULL;
 110     m_cmap = (GdkColormap *) NULL;
 111     m_owner = (wxWindow *)NULL;
 112     m_isMemDC = FALSE;
 113     m_font = window->GetFont();
 114
 115     wxASSERT_MSG( window, _T("DC needs a window") );
 116
 117     GtkWidget *widget = window->m_wxwindow;
 118
 119     wxASSERT_MSG( widget, _T("DC needs a widget") );
 120
 121     m_window = widget->window;
 122
 123     /* not realized ? */
 124     if (!m_window)
 125     {
 126          /* don't report problems */
 127          m_ok = TRUE;
 128
 129          return;
 130     }
 131
 132     if (window->m_wxwindow)
 133         m_cmap = gtk_widget_get_colormap( window->m_wxwindow );
 134     else
 135         m_cmap = gtk_widget_get_colormap( window->m_widget );
 136
 137     SetUpDC();
 138
 139     /* this must be done after SetUpDC, bacause SetUpDC calls the
 140        repective SetBrush, SetPen, SetBackground etc functions
 141        to set up the DC. SetBackground call m_owner->SetBackground
 142        and this might not be desired as the standard dc background
 143        is white whereas a window might assume gray to be the
 144        standard (as e.g. wxStatusBar) */
 145
 146     m_owner = window;
 147 }
 148
 149 wxWindowDC::~wxWindowDC()
 150 {
 151     Destroy();
 152 }
 153
 154 void wxWindowDC::DoFloodFill( long WXUNUSED(x), long WXUNUSED(y),
 155                            const wxColour &WXUNUSED(col), int WXUNUSED(style) )
 156 {
 157     wxFAIL_MSG( _T("wxWindowDC::DoFloodFill not implemented") );
 158 }
 159
 160 bool wxWindowDC::DoGetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
 161 {
 162     wxFAIL_MSG( _T("wxWindowDC::DoGetPixel not implemented") );
 163     return FALSE;
 164 }
 165
 166 void wxWindowDC::DoDrawLine( long x1, long y1, long x2, long y2 )
 167 {
 168     wxCHECK_RET( Ok(), _T("invalid window dc") );
 169
 170     if (m_pen.GetStyle() != wxTRANSPARENT)
 171     {
 172         if (m_window)
 173             gdk_draw_line( m_window, m_penGC, XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2) );
 174
 175         CalcBoundingBox(x1, y1);
 176         CalcBoundingBox(x2, y2);
 177     }
 178 }
 179
 180 void wxWindowDC::DoCrossHair( long x, long y )
 181 {
 182     wxCHECK_RET( Ok(), _T("invalid window dc") );
 183
 184     if (m_pen.GetStyle() != wxTRANSPARENT)
 185     {
 186         int w = 0;
 187         int h = 0;
 188         GetSize( &w, &h );
 189         long xx = XLOG2DEV(x);
 190         long yy = YLOG2DEV(y);
 191         if (m_window)
 192         {
 193             gdk_draw_line( m_window, m_penGC, 0, yy, XLOG2DEVREL(w), yy );
 194             gdk_draw_line( m_window, m_penGC, xx, 0, xx, YLOG2DEVREL(h) );
 195         }
 196     }
 197 }
 198
 199 void wxWindowDC::DoDrawArc( long x1, long y1, long x2, long y2,
 200                             long xc, long yc )
 201 {
 202     wxCHECK_RET( Ok(), _T("invalid window dc") );
 203
 204     long xx1 = XLOG2DEV(x1);
 205     long yy1 = YLOG2DEV(y1);
 206     long xx2 = XLOG2DEV(x2);
 207     long yy2 = YLOG2DEV(y2);
 208     long xxc = XLOG2DEV(xc);
 209     long yyc = YLOG2DEV(yc);
 210     double dx = xx1 - xxc;
 211     double dy = yy1 - yyc;
 212     double radius = sqrt(dx*dx+dy*dy);
 213     long   r      = (long)radius;
 214     double radius1, radius2;
 215
 216     if (xx1 == xx2 && yy1 == yy2)
 217     {
 218         radius1 = 0.0;
 219         radius2 = 360.0;
 220     }
 221     else
 222     if (radius == 0.0)
 223     {
 224         radius1 = radius2 = 0.0;
 225     }
 226     else
 227     {
 228         radius1 = (xx1 - xxc == 0) ?
 229             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 230             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 231         radius2 = (xx2 - xxc == 0) ?
 232             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 233             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 234     }
 235     long alpha1 = long(radius1 * 64.0);
 236     long alpha2 = long((radius2 - radius1) * 64.0);
 237     while (alpha2 <= 0) alpha2 += 360*64;
 238     while (alpha1 > 360*64) alpha1 -= 360*64;
 239
 240     if (m_window)
 241     {
 242         if (m_brush.GetStyle() != wxTRANSPARENT)
 243             gdk_draw_arc( m_window, m_brushGC, TRUE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 244
 245         if (m_pen.GetStyle() != wxTRANSPARENT)
 246             gdk_draw_arc( m_window, m_penGC, FALSE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 247     }
 248
 249     CalcBoundingBox (x1, y1);
 250     CalcBoundingBox (x2, y2);
 251 }
 252
 253 void wxWindowDC::DoDrawEllipticArc( long x, long y, long width, long height, double sa, double ea )
 254 {
 255     wxCHECK_RET( Ok(), _T("invalid window dc") );
 256
 257     long xx = XLOG2DEV(x);
 258     long yy = YLOG2DEV(y);
 259     long ww = m_signX * XLOG2DEVREL(width);
 260     long hh = m_signY * YLOG2DEVREL(height);
 261
 262     // CMB: handle -ve width and/or height
 263     if (ww < 0) { ww = -ww; xx = xx - ww; }
 264     if (hh < 0) { hh = -hh; yy = yy - hh; }
 265
 266     if (m_window)
 267     {
 268         long start = long(sa * 64.0);
 269         long end = long(ea * 64.0);
 270
 271         if (m_brush.GetStyle() != wxTRANSPARENT)
 272             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, start, end );
 273
 274         if (m_pen.GetStyle() != wxTRANSPARENT)
 275             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, start, end );
 276     }
 277
 278     CalcBoundingBox (x, y);
 279     CalcBoundingBox (x + width, y + height);
 280 }
 281
 282 void wxWindowDC::DoDrawPoint( long x, long y )
 283 {
 284     wxCHECK_RET( Ok(), _T("invalid window dc") );
 285
 286     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 287         gdk_draw_point( m_window, m_penGC, XLOG2DEV(x), YLOG2DEV(y) );
 288
 289     CalcBoundingBox (x, y);
 290 }
 291
 292 void wxWindowDC::DoDrawLines( int n, wxPoint points[], long xoffset, long yoffset )
 293 {
 294     wxCHECK_RET( Ok(), _T("invalid window dc") );
 295
 296     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 297     if (n <= 0) return;
 298
 299     CalcBoundingBox( points[0].x + xoffset, points[0].y + yoffset );
 300
 301     for (int i = 0; i < n-1; i++)
 302     {
 303         long x1 = XLOG2DEV(points[i].x + xoffset);
 304         long x2 = XLOG2DEV(points[i+1].x + xoffset);
 305         long y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 306         long y2 = YLOG2DEV(points[i+1].y + yoffset);
 307
 308         if (m_window)
 309             gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 310
 311         CalcBoundingBox( points[i+1].x + xoffset, points[i+1].y + yoffset );
 312     }
 313 }
 314
 315 void wxWindowDC::DoDrawPolygon( int n, wxPoint points[], long xoffset, long yoffset, int WXUNUSED(fillStyle) )
 316 {
 317     wxCHECK_RET( Ok(), _T("invalid window dc") );
 318
 319     if (n <= 0) return;
 320
 321     GdkPoint *gdkpoints = new GdkPoint[n+1];
 322     int i;
 323     for (i = 0 ; i < n ; i++)
 324     {
 325         gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
 326         gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
 327
 328         CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset );
 329     }
 330
 331     if ((m_brush.GetStyle() != wxTRANSPARENT) && m_window)
 332         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 333
 334     // To do: Fillstyle
 335
 336     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 337     {
 338         for (i = 0 ; i < n ; i++)
 339         {
 340             gdk_draw_line( m_window, m_penGC,
 341                            gdkpoints[i%n].x,
 342                            gdkpoints[i%n].y,
 343                            gdkpoints[(i+1)%n].x,
 344                            gdkpoints[(i+1)%n].y);
 345         }
 346     }
 347
 348     delete[] gdkpoints;
 349 }
 350
 351 void wxWindowDC::DoDrawRectangle( long x, long y, long width, long height )
 352 {
 353     wxCHECK_RET( Ok(), _T("invalid window dc") );
 354
 355     long xx = XLOG2DEV(x);
 356     long yy = YLOG2DEV(y);
 357     long ww = m_signX * XLOG2DEVREL(width);
 358     long hh = m_signY * YLOG2DEVREL(height);
 359
 360     // CMB: draw nothing if transformed w or h is 0
 361     if (ww == 0 || hh == 0) return;
 362
 363     // CMB: handle -ve width and/or height
 364     if (ww < 0) { ww = -ww; xx = xx - ww; }
 365     if (hh < 0) { hh = -hh; yy = yy - hh; }
 366
 367     if (m_window)
 368     {
 369         if (m_brush.GetStyle() != wxTRANSPARENT)
 370             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 371
 372         if (m_pen.GetStyle() != wxTRANSPARENT)
 373             gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 374     }
 375
 376     CalcBoundingBox( x, y );
 377     CalcBoundingBox( x + width, y + height );
 378 }
 379
 380 void wxWindowDC::DoDrawRoundedRectangle( long x, long y, long width, long height, double radius )
 381 {
 382     wxCHECK_RET( Ok(), _T("invalid window dc") );
 383
 384     if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 385
 386     long xx = XLOG2DEV(x);
 387     long yy = YLOG2DEV(y);
 388     long ww = m_signX * XLOG2DEVREL(width);
 389     long hh = m_signY * YLOG2DEVREL(height);
 390     long rr = XLOG2DEVREL((long)radius);
 391
 392     // CMB: handle -ve width and/or height
 393     if (ww < 0) { ww = -ww; xx = xx - ww; }
 394     if (hh < 0) { hh = -hh; yy = yy - hh; }
 395
 396     // CMB: if radius is zero use DrawRectangle() instead to avoid
 397     // X drawing errors with small radii
 398     if (rr == 0)
 399     {
 400         DrawRectangle( x, y, width, height );
 401         return;
 402     }
 403
 404     // CMB: draw nothing if transformed w or h is 0
 405     if (ww == 0 || hh == 0) return;
 406
 407     // CMB: adjust size if outline is drawn otherwise the result is
 408     // 1 pixel too wide and high
 409     if (m_pen.GetStyle() != wxTRANSPARENT)
 410     {
 411         ww--;
 412         hh--;
 413     }
 414
 415     if (m_window)
 416     {
 417         // CMB: ensure dd is not larger than rectangle otherwise we
 418         // get an hour glass shape
 419         long dd = 2 * rr;
 420         if (dd > ww) dd = ww;
 421         if (dd > hh) dd = hh;
 422         rr = dd / 2;
 423
 424         if (m_brush.GetStyle() != wxTRANSPARENT)
 425         {
 426             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 427             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 428             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 429             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 430             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 431             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 432         }
 433
 434         if (m_pen.GetStyle() != wxTRANSPARENT)
 435         {
 436             gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 437             gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 438             gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 439             gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 440             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 441             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 442             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 443             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 444         }
 445     }
 446
 447     // this ignores the radius
 448     CalcBoundingBox( x, y );
 449     CalcBoundingBox( x + width, y + height );
 450 }
 451
 452 void wxWindowDC::DoDrawEllipse( long x, long y, long width, long height )
 453 {
 454     wxCHECK_RET( Ok(), _T("invalid window dc") );
 455
 456     long xx = XLOG2DEV(x);
 457     long yy = YLOG2DEV(y);
 458     long ww = m_signX * XLOG2DEVREL(width);
 459     long hh = m_signY * YLOG2DEVREL(height);
 460
 461     // CMB: handle -ve width and/or height
 462     if (ww < 0) { ww = -ww; xx = xx - ww; }
 463     if (hh < 0) { hh = -hh; yy = yy - hh; }
 464
 465     if (m_window)
 466     {
 467         if (m_brush.GetStyle() != wxTRANSPARENT)
 468             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 469
 470         if (m_pen.GetStyle() != wxTRANSPARENT)
 471             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 472     }
 473
 474     CalcBoundingBox( x - width, y - height );
 475     CalcBoundingBox( x + width, y + height );
 476 }
 477
 478 void wxWindowDC::DoDrawIcon( const wxIcon &icon, long x, long y )
 479 {
 480     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 481     DoDrawBitmap( (const wxBitmap&)icon, x, y, (bool)TRUE );
 482 }
 483
 484 void wxWindowDC::DoDrawBitmap( const wxBitmap &bitmap,
 485                                long x, long y,
 486                                bool useMask )
 487 {
 488     wxCHECK_RET( Ok(), _T("invalid window dc") );
 489
 490     wxCHECK_RET( bitmap.Ok(), _T("invalid bitmap") );
 491
 492     /* scale/translate size and position */
 493
 494     int xx = XLOG2DEV(x);
 495     int yy = YLOG2DEV(y);
 496
 497     int w = bitmap.GetWidth();
 498     int h = bitmap.GetHeight();
 499
 500     CalcBoundingBox( x, y );
 501     CalcBoundingBox( x + w, y + h );
 502
 503     if (!m_window) return;
 504
 505     int ww = XLOG2DEVREL(w);
 506     int hh = YLOG2DEVREL(h);
 507
 508     /* scale bitmap if required */
 509
 510     wxBitmap use_bitmap;
 511
 512     if ((w != ww) || (h != hh))
 513     {
 514         wxImage image( bitmap );
 515         image = image.Scale( ww, hh );
 516
 517         use_bitmap = image.ConvertToBitmap();
 518     }
 519     else
 520     {
 521         use_bitmap = bitmap;
 522     }
 523
 524     /* apply mask if any */
 525
 526     GdkBitmap *mask = (GdkBitmap *) NULL;
 527     if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 528
 529     if (useMask && mask)
 530     {
 531         gdk_gc_set_clip_mask( m_penGC, mask );
 532         gdk_gc_set_clip_origin( m_penGC, xx, yy );
 533     }
 534
 535     /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 536
 537     GdkPixmap *pm = use_bitmap.GetPixmap();
 538     if (pm)
 539     {
 540         gdk_draw_pixmap( m_window, m_penGC, pm, 0, 0, xx, yy, -1, -1 );
 541     }
 542     else
 543     {
 544         GdkBitmap *bm = use_bitmap.GetBitmap();
 545         if (bm)
 546         {
 547             gdk_draw_bitmap( m_window, m_penGC, bm, 0, 0, xx, yy, -1, -1 );
 548         }
 549     }
 550
 551     /* remove mask again if any */
 552
 553     if (useMask && mask)
 554     {
 555         gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 556         gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 557     }
 558 }
 559
 560 bool wxWindowDC::DoBlit( long xdest, long ydest, long width, long height,
 561                          wxDC *source, long xsrc, long ysrc,
 562                          int logical_func, bool useMask )
 563 {
 564    /* this is the nth try to get this utterly useless function to
 565       work. it now completely ignores the scaling or translation
 566       of the source dc, but scales correctly on the target dc and
 567       knows about possible mask information in a memory dc. */
 568
 569     wxCHECK_MSG( Ok(), FALSE, _T("invalid window dc") );
 570
 571     wxCHECK_MSG( source, FALSE, _T("invalid source dc") );
 572
 573     if (!m_window) return FALSE;
 574
 575     wxClientDC *srcDC = (wxClientDC*)source;
 576     wxMemoryDC *memDC = (wxMemoryDC*)source;
 577
 578     bool use_bitmap_method = FALSE;
 579
 580     if (srcDC->m_isMemDC)
 581     {
 582         if (!memDC->m_selected.Ok()) return FALSE;
 583
 584         /* we use the "XCopyArea" way to copy a memory dc into
 585            y different window if the memory dc BOTH
 586            a) doesn't have any mask or its mask isn't used
 587            b) it is clipped
 588            c) is not 1-bit */
 589
 590         if (useMask && (memDC->m_selected.GetMask()))
 591         {
 592            /* we HAVE TO use the direct way for memory dcs
 593               that have mask since the XCopyArea doesn't know
 594               about masks */
 595             use_bitmap_method = TRUE;
 596         }
 597         else if (memDC->m_selected.GetDepth() == 1)
 598         {
 599            /* we HAVE TO use the direct way for memory dcs
 600               that are bitmaps because XCopyArea doesn't cope
 601               with different bit depths */
 602             use_bitmap_method = TRUE;
 603         }
 604         else if ((xsrc == 0) && (ysrc == 0) &&
 605                  (width == memDC->m_selected.GetWidth()) &&
 606                  (height == memDC->m_selected.GetHeight()))
 607         {
 608            /* we SHOULD use the direct way if all of the bitmap
 609               in the memory dc is copied in which case XCopyArea
 610               wouldn't be able able to boost performace by reducing
 611               the area to be scaled */
 612             use_bitmap_method = TRUE;
 613         }
 614         else
 615         {
 616             use_bitmap_method = FALSE;
 617         }
 618     }
 619
 620     CalcBoundingBox( xdest, ydest );
 621     CalcBoundingBox( xdest + width, ydest + height );
 622
 623     int old_logical_func = m_logicalFunction;
 624     SetLogicalFunction( logical_func );
 625
 626     if (use_bitmap_method)
 627     {
 628         /* scale/translate bitmap size */
 629
 630         long bm_width = memDC->m_selected.GetWidth();
 631         long bm_height = memDC->m_selected.GetHeight();
 632
 633         long bm_ww = XLOG2DEVREL( bm_width );
 634         long bm_hh = YLOG2DEVREL( bm_height );
 635
 636         /* scale bitmap if required */
 637
 638         wxBitmap use_bitmap;
 639
 640         if ((bm_width != bm_ww) || (bm_height != bm_hh))
 641         {
 642             wxImage image( memDC->m_selected );
 643             image = image.Scale( bm_ww, bm_hh );
 644
 645             use_bitmap = image.ConvertToBitmap();
 646         }
 647         else
 648         {
 649             use_bitmap = memDC->m_selected;
 650         }
 651
 652         /* scale/translate size and position */
 653
 654         long xx = XLOG2DEV(xdest);
 655         long yy = YLOG2DEV(ydest);
 656
 657         long ww = XLOG2DEVREL(width);
 658         long hh = YLOG2DEVREL(height);
 659
 660         /* apply mask if any */
 661
 662         GdkBitmap *mask = (GdkBitmap *) NULL;
 663         if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 664
 665         if (useMask && mask)
 666         {
 667             gdk_gc_set_clip_mask( m_penGC, mask );
 668             gdk_gc_set_clip_origin( m_penGC, xx, yy );
 669         }
 670
 671         /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 672
 673         GdkPixmap *pm = use_bitmap.GetPixmap();
 674         if (pm)
 675         {
 676             gdk_draw_pixmap( m_window, m_penGC, pm, xsrc, ysrc, xx, yy, ww, hh );
 677         }
 678         else
 679         {
 680             GdkBitmap *bm = use_bitmap.GetBitmap();
 681             if (bm)
 682             {
 683                 /* we use the textGC here because blitting a bitmap is done
 684                    using the current text colour */
 685                 gdk_draw_bitmap( m_window, m_textGC, bm, xsrc, ysrc, xx, yy, ww, hh );
 686             }
 687         }
 688
 689         /* remove mask again if any */
 690
 691         if (useMask && mask)
 692         {
 693             gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 694             gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 695         }
 696     }
 697     else /* use_bitmap_method */
 698     {
 699         /* scale/translate size and position */
 700
 701         long xx = XLOG2DEV(xdest);
 702         long yy = YLOG2DEV(ydest);
 703
 704         long ww = XLOG2DEVREL(width);
 705         long hh = YLOG2DEVREL(height);
 706
 707         if ((width != ww) || (height != hh))
 708         {
 709             /* draw source window into a bitmap as we cannot scale
 710                a window in contrast to a bitmap. this would actually
 711                work with memory dcs as well, but we'd lose the mask
 712                information and waste one step in this process since
 713                a memory already has a bitmap. all this is slightly
 714                inefficient as we could take an XImage directly from
 715                an X window, but we'd then also have to care that
 716                the window is not outside the screen (in which case
 717                we'd get a BadMatch or what not).
 718                Is a double XGetImage and combined XGetPixel and
 719                XPutPixel really faster? I'm not sure. look at wxXt
 720                for a different implementation of the same problem. */
 721
 722             wxBitmap bitmap( width, height );
 723             gdk_window_copy_area( bitmap.GetPixmap(), m_penGC, 0, 0,
 724                                   srcDC->GetWindow(),
 725                                   xsrc, ysrc, width, height );
 726
 727             /* scale image */
 728
 729             wxImage image( bitmap );
 730             image = image.Scale( ww, hh );
 731
 732             /* convert to bitmap */
 733
 734             bitmap = image.ConvertToBitmap();
 735
 736             /* draw scaled bitmap */
 737
 738             gdk_draw_pixmap( m_window, m_penGC, bitmap.GetPixmap(), 0, 0, xx, yy, -1, -1 );
 739
 740         }
 741         else
 742         {
 743             /* no scaling and not a memory dc with a mask either */
 744
 745             gdk_window_copy_area( m_window, m_penGC, xx, yy,
 746                                   srcDC->GetWindow(),
 747                                   xsrc, ysrc, width, height );
 748         }
 749     }
 750
 751     SetLogicalFunction( old_logical_func );
 752     return TRUE;
 753 }
 754
 755 void wxWindowDC::DoDrawText( const wxString &text, long x, long y )
 756 {
 757     wxCHECK_RET( Ok(), _T("invalid window dc") );
 758
 759     if (!m_window) return;
 760
 761     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 762
 763     x = XLOG2DEV(x);
 764     y = YLOG2DEV(y);
 765
 766     /* CMB 21/5/98: draw text background if mode is wxSOLID */
 767     if (m_backgroundMode == wxSOLID)
 768     {
 769         long width = gdk_string_width( font, text.mbc_str() );
 770         long height = font->ascent + font->descent;
 771         gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 772         gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 773         gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 774     }
 775     gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text.mbc_str() );
 776
 777     /* CMB 17/7/98: simple underline: ignores scaling and underlying
 778        X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 779        properties (see wxXt implementation) */
 780     if (m_font.GetUnderlined())
 781     {
 782         long width = gdk_string_width( font, text.mbc_str() );
 783         long ul_y = y + font->ascent;
 784         if (font->descent > 0) ul_y++;
 785         gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 786     }
 787
 788     long w, h;
 789     GetTextExtent (text, &w, &h);
 790     CalcBoundingBox (x + w, y + h);
 791     CalcBoundingBox (x, y);
 792 }
 793
 794 void wxWindowDC::GetTextExtent( const wxString &string, long *width, long *height,
 795                                 long *descent, long *externalLeading,
 796                                 wxFont *theFont ) const
 797 {
 798     wxFont fontToUse = m_font;
 799     if (theFont) fontToUse = *theFont;
 800
 801     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 802     if (width) (*width) = long(gdk_string_width( font, string.mbc_str() ) / m_scaleX);
 803     if (height) (*height) = long((font->ascent + font->descent) / m_scaleY);
 804     if (descent) (*descent) = long(font->descent / m_scaleY);
 805     if (externalLeading) (*externalLeading) = 0;  // ??
 806 }
 807
 808 long wxWindowDC::GetCharWidth() const
 809 {
 810     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 811     return long(gdk_string_width( font, "H" ) / m_scaleX);
 812 }
 813
 814 long wxWindowDC::GetCharHeight() const
 815 {
 816     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 817     return long((font->ascent + font->descent) / m_scaleY);
 818 }
 819
 820 void wxWindowDC::Clear()
 821 {
 822     wxCHECK_RET( Ok(), _T("invalid window dc") );
 823
 824     if (!m_window) return;
 825
 826     /* - we either are a memory dc or have a window as the
 827        owner. anything else shouldn't happen.
 828        - we don't use gdk_window_clear() as we don't set
 829        the window's background colour anymore. it is too
 830        much pain to keep the DC's and the window's back-
 831        ground colour in synch. */
 832
 833     if (m_owner)
 834     {
 835         int width,height;
 836         m_owner->GetSize( &width, &height );
 837         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 838         return;
 839     }
 840
 841     if (m_isMemDC)
 842     {
 843         int width,height;
 844         GetSize( &width, &height );
 845         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 846         return;
 847     }
 848 }
 849
 850 void wxWindowDC::SetFont( const wxFont &font )
 851 {
 852     m_font = font;
 853 }
 854
 855 void wxWindowDC::SetPen( const wxPen &pen )
 856 {
 857     wxCHECK_RET( Ok(), _T("invalid window dc") );
 858
 859     if (m_pen == pen) return;
 860
 861     m_pen = pen;
 862
 863     if (!m_pen.Ok()) return;
 864
 865     if (!m_window) return;
 866
 867     gint width = m_pen.GetWidth();
 868     if (width <= 0)
 869     {
 870         // CMB: if width is non-zero scale it with the dc
 871         width = 1;
 872     }
 873     else
 874     {
 875         // X doesn't allow different width in x and y and so we take
 876         // the average
 877         double w = 0.5 +
 878                    ( fabs((double) XLOG2DEVREL(width)) +
 879                      fabs((double) YLOG2DEVREL(width)) ) / 2.0;
 880         width = (int)w;
 881     }
 882
 883     static const char dotted[] = {1, 1};
 884     static const char short_dashed[] = {2, 2};
 885     static const char long_dashed[] = {2, 4};
 886     static const char dotted_dashed[] = {3, 3, 1, 3};
 887
 888     // We express dash pattern in pen width unit, so we are
 889     // independent of zoom factor and so on...
 890     int req_nb_dash;
 891     const char *req_dash;
 892
 893     GdkLineStyle lineStyle = GDK_LINE_SOLID;
 894     switch (m_pen.GetStyle())
 895     {
 896         case wxUSER_DASH:
 897         {
 898             lineStyle = GDK_LINE_ON_OFF_DASH;
 899             req_nb_dash = m_pen.GetDashCount();
 900             req_dash = m_pen.GetDash();
 901             break;
 902         }
 903         case wxDOT:
 904         {
 905             lineStyle = GDK_LINE_ON_OFF_DASH;
 906             req_nb_dash = 2;
 907             req_dash = dotted;
 908             break;
 909         }
 910         case wxLONG_DASH:
 911         {
 912             lineStyle = GDK_LINE_ON_OFF_DASH;
 913             req_nb_dash = 2;
 914             req_dash = long_dashed;
 915             break;
 916         }
 917         case wxSHORT_DASH:
 918         {
 919             lineStyle = GDK_LINE_ON_OFF_DASH;
 920             req_nb_dash = 2;
 921             req_dash = short_dashed;
 922             break;
 923         }
 924         case wxDOT_DASH:
 925         {
 926 //            lineStyle = GDK_LINE_DOUBLE_DASH;
 927             lineStyle = GDK_LINE_ON_OFF_DASH;
 928             req_nb_dash = 4;
 929             req_dash = dotted_dashed;
 930             break;
 931         }
 932
 933         case wxTRANSPARENT:
 934         case wxSTIPPLE:
 935         case wxSOLID:
 936         default:
 937         {
 938             lineStyle = GDK_LINE_SOLID;
 939             req_dash = (wxDash*)NULL;
 940             req_nb_dash = 0;
 941             break;
 942         }
 943     }
 944
 945 #if (GTK_MINOR_VERSION > 0)
 946     if (req_dash && req_nb_dash)
 947     {
 948         char *real_req_dash = new char[req_nb_dash];
 949         if (real_req_dash)
 950         {
 951             for (int i = 0; i < req_nb_dash; i++)
 952                 real_req_dash[i] = req_dash[i] * width;
 953             gdk_gc_set_dashes( m_penGC, 0, real_req_dash, req_nb_dash );
 954             delete[] real_req_dash;
 955         }
 956         else
 957         {
 958             // No Memory. We use non-scaled dash pattern...
 959             gdk_gc_set_dashes( m_penGC, 0, (char*)req_dash, req_nb_dash );
 960         }
 961     }
 962 #endif
 963
 964     GdkCapStyle capStyle = GDK_CAP_ROUND;
 965     switch (m_pen.GetCap())
 966     {
 967         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
 968         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
 969         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
 970     }
 971
 972     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
 973     switch (m_pen.GetJoin())
 974     {
 975         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
 976         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
 977         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
 978     }
 979
 980     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
 981
 982     m_pen.GetColour().CalcPixel( m_cmap );
 983     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
 984 }
 985
 986 void wxWindowDC::SetBrush( const wxBrush &brush )
 987 {
 988     wxCHECK_RET( Ok(), _T("invalid window dc") );
 989
 990     if (m_brush == brush) return;
 991
 992     m_brush = brush;
 993
 994     if (!m_brush.Ok()) return;
 995
 996     if (!m_window) return;
 997
 998     m_brush.GetColour().CalcPixel( m_cmap );
 999     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
1000
1001     gdk_gc_set_fill( m_brushGC, GDK_SOLID );
1002
1003     if ((m_brush.GetStyle() == wxSTIPPLE) && (m_brush.GetStipple()->Ok()))
1004     {
1005         if (m_brush.GetStipple()->GetPixmap())
1006         {
1007             gdk_gc_set_fill( m_brushGC, GDK_TILED );
1008             gdk_gc_set_tile( m_brushGC, m_brush.GetStipple()->GetPixmap() );
1009         }
1010         else
1011         {
1012             gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1013             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetBitmap() );
1014         }
1015     }
1016
1017     if (IS_HATCH(m_brush.GetStyle()))
1018     {
1019         gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1020         int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
1021         gdk_gc_set_stipple( m_brushGC, hatches[num] );
1022     }
1023 }
1024
1025 void wxWindowDC::SetBackground( const wxBrush &brush )
1026 {
1027    /* CMB 21/7/98: Added SetBackground. Sets background brush
1028     * for Clear() and bg colour for shapes filled with cross-hatch brush */
1029
1030     wxCHECK_RET( Ok(), _T("invalid window dc") );
1031
1032     if (m_backgroundBrush == brush) return;
1033
1034     m_backgroundBrush = brush;
1035
1036     if (!m_backgroundBrush.Ok()) return;
1037
1038     if (!m_window) return;
1039
1040     m_backgroundBrush.GetColour().CalcPixel( m_cmap );
1041     gdk_gc_set_background( m_brushGC, m_backgroundBrush.GetColour().GetColor() );
1042     gdk_gc_set_background( m_penGC, m_backgroundBrush.GetColour().GetColor() );
1043     gdk_gc_set_background( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1044     gdk_gc_set_foreground( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1045
1046     gdk_gc_set_fill( m_bgGC, GDK_SOLID );
1047
1048     if ((m_backgroundBrush.GetStyle() == wxSTIPPLE) && (m_backgroundBrush.GetStipple()->Ok()))
1049     {
1050         if (m_backgroundBrush.GetStipple()->GetPixmap())
1051         {
1052             gdk_gc_set_fill( m_bgGC, GDK_TILED );
1053             gdk_gc_set_tile( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
1054         }
1055         else
1056         {
1057             gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1058             gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetBitmap() );
1059         }
1060     }
1061
1062     if (IS_HATCH(m_backgroundBrush.GetStyle()))
1063     {
1064         gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1065         int num = m_backgroundBrush.GetStyle() - wxBDIAGONAL_HATCH;
1066         gdk_gc_set_stipple( m_bgGC, hatches[num] );
1067     }
1068 }
1069
1070 void wxWindowDC::SetLogicalFunction( int function )
1071 {
1072     wxCHECK_RET( Ok(), _T("invalid window dc") );
1073
1074     if (m_logicalFunction == function) return;
1075
1076     GdkFunction mode = GDK_COPY;
1077     switch (function)
1078     {
1079         case wxXOR:          mode = GDK_XOR;           break;
1080         case wxINVERT:       mode = GDK_INVERT;        break;
1081 #if (GTK_MINOR_VERSION > 0)
1082         case wxOR_REVERSE:   mode = GDK_OR_REVERSE;    break;
1083         case wxAND_REVERSE:  mode = GDK_AND_REVERSE;   break;
1084         case wxCLEAR:        mode = GDK_CLEAR;         break;
1085         case wxSET:          mode = GDK_SET;           break;
1086         case wxOR_INVERT:    mode = GDK_OR_INVERT;     break;
1087         case wxSRC_AND:
1088         case wxAND:          mode = GDK_AND;           break;
1089         case wxSRC_OR:
1090         case wxOR:           mode = GDK_OR;            break;
1091         case wxEQUIV:        mode = GDK_EQUIV;         break;
1092         case wxNAND:         mode = GDK_NAND;          break;
1093         case wxAND_INVERT:   mode = GDK_AND_INVERT;    break;
1094         case wxCOPY:         mode = GDK_COPY;          break;
1095         case wxNO_OP:        mode = GDK_NOOP;          break;
1096         case wxSRC_INVERT:   mode = GDK_COPY_INVERT;   break;
1097 #endif
1098         default:
1099         {
1100            wxFAIL_MSG( _T("unsupported logical function") );
1101            break;
1102         }
1103     }
1104
1105     m_logicalFunction = function;
1106
1107     if (!m_window) return;
1108
1109     gdk_gc_set_function( m_penGC, mode );
1110     gdk_gc_set_function( m_brushGC, mode );
1111     gdk_gc_set_function( m_textGC, mode );
1112 }
1113
1114 void wxWindowDC::SetTextForeground( const wxColour &col )
1115 {
1116     wxCHECK_RET( Ok(), _T("invalid window dc") );
1117
1118     if (m_textForegroundColour == col) return;
1119
1120     m_textForegroundColour = col;
1121     if (!m_textForegroundColour.Ok()) return;
1122
1123     if (!m_window) return;
1124
1125     m_textForegroundColour.CalcPixel( m_cmap );
1126     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
1127 }
1128
1129 void wxWindowDC::SetTextBackground( const wxColour &col )
1130 {
1131     wxCHECK_RET( Ok(), _T("invalid window dc") );
1132
1133     if (m_textBackgroundColour == col) return;
1134
1135     m_textBackgroundColour = col;
1136     if (!m_textBackgroundColour.Ok()) return;
1137
1138     if (!m_window) return;
1139
1140     m_textBackgroundColour.CalcPixel( m_cmap );
1141     gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
1142 }
1143
1144 void wxWindowDC::SetBackgroundMode( int mode )
1145 {
1146     wxCHECK_RET( Ok(), _T("invalid window dc") );
1147
1148     m_backgroundMode = mode;
1149
1150     if (!m_window) return;
1151
1152     // CMB 21/7/98: fill style of cross-hatch brushes is affected by
1153     // transparent/solid background mode
1154
1155     if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
1156     {
1157         gdk_gc_set_fill( m_brushGC,
1158           (m_backgroundMode == wxTRANSPARENT) ? GDK_STIPPLED : GDK_OPAQUE_STIPPLED);
1159     }
1160 }
1161
1162 void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
1163 {
1164     wxFAIL_MSG( _T("wxWindowDC::SetPalette not implemented") );
1165 }
1166
1167 void wxWindowDC::DoSetClippingRegion( long x, long y, long width, long height )
1168 {
1169     wxCHECK_RET( Ok(), _T("invalid window dc") );
1170
1171     wxDC::DoSetClippingRegion( x, y, width, height );
1172
1173     if (!m_window) return;
1174
1175     GdkRectangle rect;
1176     rect.x = XLOG2DEV(x);
1177     rect.y = YLOG2DEV(y);
1178     rect.width = XLOG2DEVREL(width);
1179     rect.height = YLOG2DEVREL(height);
1180     gdk_gc_set_clip_rectangle( m_penGC, &rect );
1181     gdk_gc_set_clip_rectangle( m_brushGC, &rect );
1182     gdk_gc_set_clip_rectangle( m_textGC, &rect );
1183     gdk_gc_set_clip_rectangle( m_bgGC, &rect );
1184 }
1185
1186 void wxWindowDC::DoSetClippingRegionAsRegion( const wxRegion &region  )
1187 {
1188     wxCHECK_RET( Ok(), _T("invalid window dc") );
1189
1190     if (region.Empty())
1191     {
1192         DestroyClippingRegion();
1193         return;
1194     }
1195
1196     if (!m_window) return;
1197
1198     gdk_gc_set_clip_region( m_penGC, region.GetRegion() );
1199     gdk_gc_set_clip_region( m_brushGC, region.GetRegion() );
1200     gdk_gc_set_clip_region( m_textGC, region.GetRegion() );
1201     gdk_gc_set_clip_region( m_bgGC, region.GetRegion() );
1202 }
1203
1204 void wxWindowDC::DestroyClippingRegion()
1205 {
1206     wxCHECK_RET( Ok(), _T("invalid window dc") );
1207
1208     wxDC::DestroyClippingRegion();
1209
1210     if (!m_window) return;
1211
1212     gdk_gc_set_clip_rectangle( m_penGC, (GdkRectangle *) NULL );
1213     gdk_gc_set_clip_rectangle( m_brushGC, (GdkRectangle *) NULL );
1214     gdk_gc_set_clip_rectangle( m_textGC, (GdkRectangle *) NULL );
1215     gdk_gc_set_clip_rectangle( m_bgGC, (GdkRectangle *) NULL );
1216 }
1217
1218 void wxWindowDC::SetUpDC()
1219 {
1220     Destroy();
1221     m_ok = TRUE;
1222     m_logicalFunction = wxCOPY;
1223     m_penGC = gdk_gc_new( m_window );
1224     m_brushGC = gdk_gc_new( m_window );
1225     m_textGC = gdk_gc_new( m_window );
1226     m_bgGC = gdk_gc_new( m_window );
1227
1228     wxColour tmp_col( m_textForegroundColour );
1229     m_textForegroundColour = wxNullColour;
1230     SetTextForeground( tmp_col );
1231     tmp_col = m_textBackgroundColour;
1232     m_textBackgroundColour = wxNullColour;
1233     SetTextBackground( tmp_col );
1234
1235     wxPen tmp_pen( m_pen );
1236     m_pen = wxNullPen;
1237     SetPen( tmp_pen );
1238
1239     wxFont tmp_font( m_font );
1240     m_font = wxNullFont;
1241     SetFont( tmp_font );
1242
1243     wxBrush tmp_brush( m_brush );
1244     m_brush = wxNullBrush;
1245     SetBrush( tmp_brush );
1246
1247 /*
1248     tmp_brush = m_backgroundBrush;
1249     m_backgroundBrush = wxNullBrush;
1250     SetBackground( tmp_brush );
1251 */
1252     tmp_brush = m_backgroundBrush;
1253     m_backgroundBrush = wxNullBrush;
1254     SetBackground( *wxWHITE_BRUSH );
1255     m_backgroundBrush = tmp_brush;
1256
1257     if (!hatch_bitmap)
1258     {
1259         hatch_bitmap    = hatches;
1260         hatch_bitmap[0] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, bdiag_bits, bdiag_width, bdiag_height );
1261         hatch_bitmap[1] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cdiag_bits, cdiag_width, cdiag_height );
1262         hatch_bitmap[2] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, fdiag_bits, fdiag_width, fdiag_height );
1263         hatch_bitmap[3] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cross_bits, cross_width, cross_height );
1264         hatch_bitmap[4] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, horiz_bits, horiz_width, horiz_height );
1265         hatch_bitmap[5] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, verti_bits, verti_width, verti_height );
1266     }
1267 }
1268
1269 void wxWindowDC::Destroy()
1270 {
1271     if (m_penGC) gdk_gc_unref( m_penGC );
1272     m_penGC = (GdkGC*) NULL;
1273     if (m_brushGC) gdk_gc_unref( m_brushGC );
1274     m_brushGC = (GdkGC*) NULL;
1275     if (m_textGC) gdk_gc_unref( m_textGC );
1276     m_textGC = (GdkGC*) NULL;
1277     if (m_bgGC) gdk_gc_unref( m_bgGC );
1278     m_bgGC = (GdkGC*) NULL;
1279 }
1280
1281 void wxWindowDC::ComputeScaleAndOrigin()
1282 {
1283     /* CMB: copy scale to see if it changes */
1284     double origScaleX = m_scaleX;
1285     double origScaleY = m_scaleY;
1286
1287     wxDC::ComputeScaleAndOrigin();
1288
1289     /* CMB: if scale has changed call SetPen to recalulate the line width */
1290     if ((m_scaleX != origScaleX || m_scaleY != origScaleY) &&
1291         (m_pen.Ok()))
1292     {
1293       /* this is a bit artificial, but we need to force wxDC to think
1294          the pen has changed */
1295       wxPen pen = m_pen;
1296       m_pen = wxNullPen;
1297       SetPen( pen );
1298   }
1299 }
1300
1301 // Resolution in pixels per logical inch
1302 wxSize wxWindowDC::GetPPI() const
1303 {
1304     return wxSize(100, 100);
1305 }
1306
1307 int wxWindowDC::GetDepth() const
1308 {
1309     wxFAIL_MSG(_T("not implemented"));
1310
1311     return -1;
1312 }
1313
1314 #if wxUSE_SPLINES
1315 // ----------------------------------- spline code ----------------------------------------
1316
1317 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1318                          double a3, double b3, double a4, double b4);
1319 void wx_clear_stack();
1320 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1321         double *y3, double *x4, double *y4);
1322 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1323           double x4, double y4);
1324 static bool wx_spline_add_point(double x, double y);
1325 static void wx_spline_draw_point_array(wxDC *dc);
1326
1327 wxList wx_spline_point_list;
1328
1329 #define                half(z1, z2)        ((z1+z2)/2.0)
1330 #define                THRESHOLD        5
1331
1332 /* iterative version */
1333
1334 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1335                  double b4)
1336 {
1337     register double  xmid, ymid;
1338     double           x1, y1, x2, y2, x3, y3, x4, y4;
1339
1340     wx_clear_stack();
1341     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1342
1343     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1344         xmid = (double)half(x2, x3);
1345         ymid = (double)half(y2, y3);
1346         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1347             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1348             wx_spline_add_point( x1, y1 );
1349             wx_spline_add_point( xmid, ymid );
1350         } else {
1351             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1352                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1353             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1354                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1355         }
1356     }
1357 }
1358
1359 /* utilities used by spline drawing routines */
1360
1361 typedef struct wx_spline_stack_struct {
1362     double           x1, y1, x2, y2, x3, y3, x4, y4;
1363 } Stack;
1364
1365 #define         SPLINE_STACK_DEPTH             20
1366 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1367 static Stack   *wx_stack_top;
1368 static int      wx_stack_count;
1369
1370 void wx_clear_stack()
1371 {
1372     wx_stack_top = wx_spline_stack;
1373     wx_stack_count = 0;
1374 }
1375
1376 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1377 {
1378     wx_stack_top->x1 = x1;
1379     wx_stack_top->y1 = y1;
1380     wx_stack_top->x2 = x2;
1381     wx_stack_top->y2 = y2;
1382     wx_stack_top->x3 = x3;
1383     wx_stack_top->y3 = y3;
1384     wx_stack_top->x4 = x4;
1385     wx_stack_top->y4 = y4;
1386     wx_stack_top++;
1387     wx_stack_count++;
1388 }
1389
1390 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1391                   double *x3, double *y3, double *x4, double *y4)
1392 {
1393     if (wx_stack_count == 0)
1394         return (0);
1395     wx_stack_top--;
1396     wx_stack_count--;
1397     *x1 = wx_stack_top->x1;
1398     *y1 = wx_stack_top->y1;
1399     *x2 = wx_stack_top->x2;
1400     *y2 = wx_stack_top->y2;
1401     *x3 = wx_stack_top->x3;
1402     *y3 = wx_stack_top->y3;
1403     *x4 = wx_stack_top->x4;
1404     *y4 = wx_stack_top->y4;
1405     return (1);
1406 }
1407
1408 static bool wx_spline_add_point(double x, double y)
1409 {
1410   wxPoint *point = new wxPoint ;
1411   point->x = (int) x;
1412   point->y = (int) y;
1413   wx_spline_point_list.Append((wxObject*)point);
1414   return TRUE;
1415 }
1416
1417 static void wx_spline_draw_point_array(wxDC *dc)
1418 {
1419   dc->DrawLines(&wx_spline_point_list, 0, 0 );
1420   wxNode *node = wx_spline_point_list.First();
1421   while (node)
1422   {
1423     wxPoint *point = (wxPoint *)node->Data();
1424     delete point;
1425     delete node;
1426     node = wx_spline_point_list.First();
1427   }
1428 }
1429
1430 void wxWindowDC::DoDrawSpline( wxList *points )
1431 {
1432     wxCHECK_RET( Ok(), _T("invalid window dc") );
1433
1434     wxPoint *p;
1435     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1436     double           x1, y1, x2, y2;
1437
1438     wxNode *node = points->First();
1439     p = (wxPoint *)node->Data();
1440
1441     x1 = p->x;
1442     y1 = p->y;
1443
1444     node = node->Next();
1445     p = (wxPoint *)node->Data();
1446
1447     x2 = p->x;
1448     y2 = p->y;
1449     cx1 = (double)((x1 + x2) / 2);
1450     cy1 = (double)((y1 + y2) / 2);
1451     cx2 = (double)((cx1 + x2) / 2);
1452     cy2 = (double)((cy1 + y2) / 2);
1453
1454     wx_spline_add_point(x1, y1);
1455
1456     while ((node = node->Next()) != NULL)
1457     {
1458         p = (wxPoint *)node->Data();
1459         x1 = x2;
1460         y1 = y2;
1461         x2 = p->x;
1462         y2 = p->y;
1463         cx4 = (double)(x1 + x2) / 2;
1464         cy4 = (double)(y1 + y2) / 2;
1465         cx3 = (double)(x1 + cx4) / 2;
1466         cy3 = (double)(y1 + cy4) / 2;
1467
1468         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1469
1470         cx1 = cx4;
1471         cy1 = cy4;
1472         cx2 = (double)(cx1 + x2) / 2;
1473         cy2 = (double)(cy1 + y2) / 2;
1474     }
1475
1476     wx_spline_add_point( cx1, cy1 );
1477     wx_spline_add_point( x2, y2 );
1478
1479     wx_spline_draw_point_array( this );
1480 }
1481
1482 #endif // wxUSE_SPLINE
1483
1484 //-----------------------------------------------------------------------------
1485 // wxPaintDC
1486 //-----------------------------------------------------------------------------
1487
1488 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC,wxWindowDC)
1489
1490 wxPaintDC::wxPaintDC()
1491   : wxWindowDC()
1492 {
1493 }
1494
1495 wxPaintDC::wxPaintDC( wxWindow *win )
1496   : wxWindowDC( win )
1497 {
1498 }
1499
1500 //-----------------------------------------------------------------------------
1501 // wxClientDC
1502 //-----------------------------------------------------------------------------
1503
1504 IMPLEMENT_DYNAMIC_CLASS(wxClientDC,wxWindowDC)
1505
1506 wxClientDC::wxClientDC()
1507   : wxWindowDC()
1508 {
1509 }
1510
1511 wxClientDC::wxClientDC( wxWindow *win )
1512   : wxWindowDC( win )
1513 {
1514 }
1515