src/gtk1/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>
  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         if (m_window)
 308             gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 309
 310         CalcBoundingBox( points[i+1].x + xoffset, points[i+1].y + yoffset );
 311     }
 312 }
 313
 314 void wxWindowDC::DoDrawPolygon( int n, wxPoint points[], long xoffset, long yoffset, int WXUNUSED(fillStyle) )
 315 {
 316     wxCHECK_RET( Ok(), _T("invalid window dc") );
 317
 318     if (n <= 0) return;
 319
 320     GdkPoint *gdkpoints = new GdkPoint[n+1];
 321     int i;
 322     for (i = 0 ; i < n ; i++)
 323     {
 324         gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
 325         gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
 326
 327         CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset );
 328     }
 329
 330     if (m_brush.GetStyle() != wxTRANSPARENT)
 331         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 332
 333     // To do: Fillstyle
 334
 335     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 336     {
 337         for (i = 0 ; i < n ; i++)
 338         {
 339             gdk_draw_line( m_window, m_penGC,
 340                            gdkpoints[i%n].x,
 341                            gdkpoints[i%n].y,
 342                            gdkpoints[(i+1)%n].x,
 343                            gdkpoints[(i+1)%n].y);
 344         }
 345     }
 346
 347     delete[] gdkpoints;
 348 }
 349
 350 void wxWindowDC::DoDrawRectangle( long x, long y, long width, long height )
 351 {
 352     wxCHECK_RET( Ok(), _T("invalid window dc") );
 353
 354     long xx = XLOG2DEV(x);
 355     long yy = YLOG2DEV(y);
 356     long ww = m_signX * XLOG2DEVREL(width);
 357     long hh = m_signY * YLOG2DEVREL(height);
 358
 359     // CMB: draw nothing if transformed w or h is 0
 360     if (ww == 0 || hh == 0) return;
 361
 362     // CMB: handle -ve width and/or height
 363     if (ww < 0) { ww = -ww; xx = xx - ww; }
 364     if (hh < 0) { hh = -hh; yy = yy - hh; }
 365
 366     if (m_window)
 367     {
 368         if (m_brush.GetStyle() != wxTRANSPARENT)
 369             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 370
 371         if (m_pen.GetStyle() != wxTRANSPARENT)
 372             gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 373     }
 374
 375     CalcBoundingBox( x, y );
 376     CalcBoundingBox( x + width, y + height );
 377 }
 378
 379 void wxWindowDC::DoDrawRoundedRectangle( long x, long y, long width, long height, double radius )
 380 {
 381     wxCHECK_RET( Ok(), _T("invalid window dc") );
 382
 383     if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 384
 385     long xx = XLOG2DEV(x);
 386     long yy = YLOG2DEV(y);
 387     long ww = m_signX * XLOG2DEVREL(width);
 388     long hh = m_signY * YLOG2DEVREL(height);
 389     long rr = XLOG2DEVREL((long)radius);
 390
 391     // CMB: handle -ve width and/or height
 392     if (ww < 0) { ww = -ww; xx = xx - ww; }
 393     if (hh < 0) { hh = -hh; yy = yy - hh; }
 394
 395     // CMB: if radius is zero use DrawRectangle() instead to avoid
 396     // X drawing errors with small radii
 397     if (rr == 0)
 398     {
 399         DrawRectangle( x, y, width, height );
 400         return;
 401     }
 402
 403     // CMB: draw nothing if transformed w or h is 0
 404     if (ww == 0 || hh == 0) return;
 405
 406     // CMB: adjust size if outline is drawn otherwise the result is
 407     // 1 pixel too wide and high
 408     if (m_pen.GetStyle() != wxTRANSPARENT)
 409     {
 410         ww--;
 411         hh--;
 412     }
 413
 414     if (m_window)
 415     {
 416         // CMB: ensure dd is not larger than rectangle otherwise we
 417         // get an hour glass shape
 418         long dd = 2 * rr;
 419         if (dd > ww) dd = ww;
 420         if (dd > hh) dd = hh;
 421         rr = dd / 2;
 422
 423         if (m_brush.GetStyle() != wxTRANSPARENT)
 424         {
 425             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 426             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 427             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 428             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 429             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 430             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 431         }
 432
 433         if (m_pen.GetStyle() != wxTRANSPARENT)
 434         {
 435             gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 436             gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 437             gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 438             gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 439             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 440             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 441             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 442             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 443         }
 444     }
 445
 446     // this ignores the radius
 447     CalcBoundingBox( x, y );
 448     CalcBoundingBox( x + width, y + height );
 449 }
 450
 451 void wxWindowDC::DoDrawEllipse( long x, long y, long width, long height )
 452 {
 453     wxCHECK_RET( Ok(), _T("invalid window dc") );
 454
 455     long xx = XLOG2DEV(x);
 456     long yy = YLOG2DEV(y);
 457     long ww = m_signX * XLOG2DEVREL(width);
 458     long hh = m_signY * YLOG2DEVREL(height);
 459
 460     // CMB: handle -ve width and/or height
 461     if (ww < 0) { ww = -ww; xx = xx - ww; }
 462     if (hh < 0) { hh = -hh; yy = yy - hh; }
 463
 464     if (m_window)
 465     {
 466         if (m_brush.GetStyle() != wxTRANSPARENT)
 467             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 468
 469         if (m_pen.GetStyle() != wxTRANSPARENT)
 470             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 471     }
 472
 473     CalcBoundingBox( x - width, y - height );
 474     CalcBoundingBox( x + width, y + height );
 475 }
 476
 477 void wxWindowDC::DoDrawIcon( const wxIcon &icon, long x, long y )
 478 {
 479     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 480     DoDrawBitmap( (const wxBitmap&)icon, x, y, (bool)TRUE );
 481 }
 482
 483 void wxWindowDC::DoDrawBitmap( const wxBitmap &bitmap,
 484                                long x, long y,
 485                                bool useMask )
 486 {
 487     wxCHECK_RET( Ok(), _T("invalid window dc") );
 488
 489     wxCHECK_RET( bitmap.Ok(), _T("invalid bitmap") );
 490
 491     /* scale/translate size and position */
 492
 493     int xx = XLOG2DEV(x);
 494     int yy = YLOG2DEV(y);
 495
 496     int w = bitmap.GetWidth();
 497     int h = bitmap.GetHeight();
 498
 499     CalcBoundingBox( x, y );
 500     CalcBoundingBox( x + w, y + h );
 501
 502     if (!m_window) return;
 503
 504     int ww = XLOG2DEVREL(w);
 505     int hh = YLOG2DEVREL(h);
 506
 507     /* scale bitmap if required */
 508
 509     wxBitmap use_bitmap;
 510
 511     if ((w != ww) || (h != hh))
 512     {
 513         wxImage image( bitmap );
 514         image = image.Scale( ww, hh );
 515
 516         use_bitmap = image.ConvertToBitmap();
 517     }
 518     else
 519     {
 520         use_bitmap = bitmap;
 521     }
 522
 523     /* apply mask if any */
 524
 525     GdkBitmap *mask = (GdkBitmap *) NULL;
 526     if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 527
 528     if (useMask && mask)
 529     {
 530         gdk_gc_set_clip_mask( m_penGC, mask );
 531         gdk_gc_set_clip_origin( m_penGC, xx, yy );
 532     }
 533
 534     /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 535
 536     GdkPixmap *pm = use_bitmap.GetPixmap();
 537     if (pm)
 538     {
 539         gdk_draw_pixmap( m_window, m_penGC, pm, 0, 0, xx, yy, -1, -1 );
 540     }
 541     else
 542     {
 543         GdkBitmap *bm = use_bitmap.GetBitmap();
 544         if (bm)
 545         {
 546             gdk_draw_bitmap( m_window, m_penGC, bm, 0, 0, xx, yy, -1, -1 );
 547         }
 548     }
 549
 550     /* remove mask again if any */
 551
 552     if (useMask && mask)
 553     {
 554         gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 555         gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 556     }
 557 }
 558
 559 bool wxWindowDC::DoBlit( long xdest, long ydest, long width, long height,
 560                          wxDC *source, long xsrc, long ysrc,
 561                          int logical_func, bool useMask )
 562 {
 563    /* this is the nth try to get this utterly useless function to
 564       work. it now completely ignores the scaling or translation
 565       of the source dc, but scales correctly on the target dc and
 566       knows about possible mask information in a memory dc. */
 567
 568     wxCHECK_MSG( Ok(), FALSE, _T("invalid window dc") );
 569
 570     wxCHECK_MSG( source, FALSE, _T("invalid source dc") );
 571
 572     if (!m_window) return FALSE;
 573
 574     wxClientDC *srcDC = (wxClientDC*)source;
 575     wxMemoryDC *memDC = (wxMemoryDC*)source;
 576
 577     bool use_bitmap_method = FALSE;
 578
 579     if (srcDC->m_isMemDC)
 580     {
 581         if (!memDC->m_selected.Ok()) return FALSE;
 582
 583         /* we use the "XCopyArea" way to copy a memory dc into
 584            y different window if the memory dc BOTH
 585            a) doesn't have any mask or its mask isn't used
 586            b) it is clipped
 587            c) is not 1-bit */
 588
 589         if (useMask && (memDC->m_selected.GetMask()))
 590         {
 591            /* we HAVE TO use the direct way for memory dcs
 592               that have mask since the XCopyArea doesn't know
 593               about masks */
 594             use_bitmap_method = TRUE;
 595         }
 596         else if (memDC->m_selected.GetDepth() == 1)
 597         {
 598            /* we HAVE TO use the direct way for memory dcs
 599               that are bitmaps because XCopyArea doesn't cope
 600               with different bit depths */
 601             use_bitmap_method = TRUE;
 602         }
 603         else if ((xsrc == 0) && (ysrc == 0) &&
 604                  (width == memDC->m_selected.GetWidth()) &&
 605                  (height == memDC->m_selected.GetHeight()))
 606         {
 607            /* we SHOULD use the direct way if all of the bitmap
 608               in the memory dc is copied in which case XCopyArea
 609               wouldn't be able able to boost performace by reducing
 610               the area to be scaled */
 611             use_bitmap_method = TRUE;
 612         }
 613         else
 614         {
 615             use_bitmap_method = FALSE;
 616         }
 617     }
 618
 619     CalcBoundingBox( xdest, ydest );
 620     CalcBoundingBox( xdest + width, ydest + height );
 621
 622     int old_logical_func = m_logicalFunction;
 623     SetLogicalFunction( logical_func );
 624
 625     if (use_bitmap_method)
 626     {
 627         /* scale/translate bitmap size */
 628
 629         long bm_width = memDC->m_selected.GetWidth();
 630         long bm_height = memDC->m_selected.GetHeight();
 631
 632         long bm_ww = XLOG2DEVREL( bm_width );
 633         long bm_hh = YLOG2DEVREL( bm_height );
 634
 635         /* scale bitmap if required */
 636
 637         wxBitmap use_bitmap;
 638
 639         if ((bm_width != bm_ww) || (bm_height != bm_hh))
 640         {
 641             wxImage image( memDC->m_selected );
 642             image = image.Scale( bm_ww, bm_hh );
 643
 644             use_bitmap = image.ConvertToBitmap();
 645         }
 646         else
 647         {
 648             use_bitmap = memDC->m_selected;
 649         }
 650
 651         /* scale/translate size and position */
 652
 653         long xx = XLOG2DEV(xdest);
 654         long yy = YLOG2DEV(ydest);
 655
 656         long ww = XLOG2DEVREL(width);
 657         long hh = YLOG2DEVREL(height);
 658
 659         /* apply mask if any */
 660
 661         GdkBitmap *mask = (GdkBitmap *) NULL;
 662         if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 663
 664         if (useMask && mask)
 665         {
 666             gdk_gc_set_clip_mask( m_penGC, mask );
 667             gdk_gc_set_clip_origin( m_penGC, xx, yy );
 668         }
 669
 670         /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 671
 672         GdkPixmap *pm = use_bitmap.GetPixmap();
 673         if (pm)
 674         {
 675             gdk_draw_pixmap( m_window, m_penGC, pm, xsrc, ysrc, xx, yy, ww, hh );
 676         }
 677         else
 678         {
 679             GdkBitmap *bm = use_bitmap.GetBitmap();
 680             if (bm)
 681             {
 682                 /* we use the textGC here because blitting a bitmap is done
 683                    using the current text colour */
 684                 gdk_draw_bitmap( m_window, m_textGC, bm, xsrc, ysrc, xx, yy, ww, hh );
 685             }
 686         }
 687
 688         /* remove mask again if any */
 689
 690         if (useMask && mask)
 691         {
 692             gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 693             gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 694         }
 695     }
 696     else /* use_bitmap_method */
 697     {
 698         /* scale/translate size and position */
 699
 700         long xx = XLOG2DEV(xdest);
 701         long yy = YLOG2DEV(ydest);
 702
 703         long ww = XLOG2DEVREL(width);
 704         long hh = YLOG2DEVREL(height);
 705
 706         if ((width != ww) || (height != hh))
 707         {
 708             /* draw source window into a bitmap as we cannot scale
 709                a window in contrast to a bitmap. this would actually
 710                work with memory dcs as well, but we'd lose the mask
 711                information and waste one step in this process since
 712                a memory already has a bitmap. all this is slightly
 713                inefficient as we could take an XImage directly from
 714                an X window, but we'd then also have to care that
 715                the window is not outside the screen (in which case
 716                we'd get a BadMatch or what not).
 717                Is a double XGetImage and combined XGetPixel and
 718                XPutPixel really faster? I'm not sure. look at wxXt
 719                for a different implementation of the same problem. */
 720
 721             wxBitmap bitmap( width, height );
 722             gdk_window_copy_area( bitmap.GetPixmap(), m_penGC, 0, 0,
 723                                   srcDC->GetWindow(),
 724                                   xsrc, ysrc, width, height );
 725
 726             /* scale image */
 727
 728             wxImage image( bitmap );
 729             image = image.Scale( ww, hh );
 730
 731             /* convert to bitmap */
 732
 733             bitmap = image.ConvertToBitmap();
 734
 735             /* draw scaled bitmap */
 736
 737             gdk_draw_pixmap( m_window, m_penGC, bitmap.GetPixmap(), 0, 0, xx, yy, -1, -1 );
 738
 739         }
 740         else
 741         {
 742             /* no scaling and not a memory dc with a mask either */
 743
 744             gdk_window_copy_area( m_window, m_penGC, xx, yy,
 745                                   srcDC->GetWindow(),
 746                                   xsrc, ysrc, width, height );
 747         }
 748     }
 749
 750     SetLogicalFunction( old_logical_func );
 751     return TRUE;
 752 }
 753
 754 void wxWindowDC::DoDrawText( const wxString &text, long x, long y )
 755 {
 756     wxCHECK_RET( Ok(), _T("invalid window dc") );
 757
 758     if (!m_window) return;
 759
 760     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 761
 762     x = XLOG2DEV(x);
 763     y = YLOG2DEV(y);
 764
 765     /* CMB 21/5/98: draw text background if mode is wxSOLID */
 766     if (m_backgroundMode == wxSOLID)
 767     {
 768         long width = gdk_string_width( font, text.mbc_str() );
 769         long height = font->ascent + font->descent;
 770         gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 771         gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 772         gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 773     }
 774     gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text.mbc_str() );
 775
 776     /* CMB 17/7/98: simple underline: ignores scaling and underlying
 777        X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 778        properties (see wxXt implementation) */
 779     if (m_font.GetUnderlined())
 780     {
 781         long width = gdk_string_width( font, text.mbc_str() );
 782         long ul_y = y + font->ascent;
 783         if (font->descent > 0) ul_y++;
 784         gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 785     }
 786
 787     long w, h;
 788     GetTextExtent (text, &w, &h);
 789     CalcBoundingBox (x + w, y + h);
 790     CalcBoundingBox (x, y);
 791 }
 792
 793 void wxWindowDC::GetTextExtent( const wxString &string, long *width, long *height,
 794                                 long *descent, long *externalLeading,
 795                                 wxFont *theFont ) const
 796 {
 797     wxFont fontToUse = m_font;
 798     if (theFont) fontToUse = *theFont;
 799
 800     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 801     if (width) (*width) = long(gdk_string_width( font, string.mbc_str() ) / m_scaleX);
 802     if (height) (*height) = long((font->ascent + font->descent) / m_scaleY);
 803     if (descent) (*descent) = long(font->descent / m_scaleY);
 804     if (externalLeading) (*externalLeading) = 0;  // ??
 805 }
 806
 807 long wxWindowDC::GetCharWidth() const
 808 {
 809     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 810     return long(gdk_string_width( font, "H" ) / m_scaleX);
 811 }
 812
 813 long wxWindowDC::GetCharHeight() const
 814 {
 815     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 816     return long((font->ascent + font->descent) / m_scaleY);
 817 }
 818
 819 void wxWindowDC::Clear()
 820 {
 821     wxCHECK_RET( Ok(), _T("invalid window dc") );
 822
 823     if (!m_window) return;
 824
 825     /* - we either are a memory dc or have a window as the
 826        owner. anything else shouldn't happen.
 827        - we don't use gdk_window_clear() as we don't set
 828        the window's background colour anymore. it is too
 829        much pain to keep the DC's and the window's back-
 830        ground colour in synch. */
 831
 832     if (m_owner)
 833     {
 834         int width,height;
 835         m_owner->GetSize( &width, &height );
 836         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 837         return;
 838     }
 839
 840     if (m_isMemDC)
 841     {
 842         int width,height;
 843         GetSize( &width, &height );
 844         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 845         return;
 846     }
 847 }
 848
 849 void wxWindowDC::SetFont( const wxFont &font )
 850 {
 851     m_font = font;
 852 }
 853
 854 void wxWindowDC::SetPen( const wxPen &pen )
 855 {
 856     wxCHECK_RET( Ok(), _T("invalid window dc") );
 857
 858     if (m_pen == pen) return;
 859
 860     m_pen = pen;
 861
 862     if (!m_pen.Ok()) return;
 863
 864     if (!m_window) return;
 865
 866     gint width = m_pen.GetWidth();
 867     if (width <= 0)
 868     {
 869         // CMB: if width is non-zero scale it with the dc
 870         width = 1;
 871     }
 872     else
 873     {
 874         // X doesn't allow different width in x and y and so we take
 875         // the average
 876         double w = 0.5 + (abs(XLOG2DEVREL(width)) + abs(YLOG2DEVREL(width))) / 2.0;
 877         width = (int)w;
 878     }
 879
 880     const static char dotted[] = {1, 1};
 881     const static char short_dashed[] = {2, 2};
 882     const static char long_dashed[] = {2, 4};
 883     const static char dotted_dashed[] = {3, 3, 1, 3};
 884
 885     // We express dash pattern in pen width unit, so we are
 886     // independent of zoom factor and so on...
 887     int req_nb_dash;
 888     const char *req_dash;
 889
 890     GdkLineStyle lineStyle = GDK_LINE_SOLID;
 891     switch (m_pen.GetStyle())
 892     {
 893         case wxUSER_DASH:
 894         {
 895             lineStyle = GDK_LINE_ON_OFF_DASH;
 896             req_nb_dash = m_pen.GetDashCount();
 897             req_dash = m_pen.GetDash();
 898             break;
 899         }
 900         case wxDOT:
 901         {
 902             lineStyle = GDK_LINE_ON_OFF_DASH;
 903             req_nb_dash = 2;
 904             req_dash = dotted;
 905             break;
 906         }
 907         case wxLONG_DASH:
 908         {
 909             lineStyle = GDK_LINE_ON_OFF_DASH;
 910             req_nb_dash = 2;
 911             req_dash = long_dashed;
 912             break;
 913         }
 914         case wxSHORT_DASH:
 915         {
 916             lineStyle = GDK_LINE_ON_OFF_DASH;
 917             req_nb_dash = 2;
 918             req_dash = short_dashed;
 919             break;
 920         }
 921         case wxDOT_DASH:
 922         {
 923 //          lineStyle = GDK_LINE_DOUBLE_DASH;
 924             lineStyle = GDK_LINE_ON_OFF_DASH;
 925             req_nb_dash = 4;
 926             req_dash = dotted_dashed;
 927             break;
 928         }
 929
 930         case wxTRANSPARENT:
 931         case wxSTIPPLE:
 932         case wxSOLID:
 933         default:
 934         {
 935             lineStyle = GDK_LINE_SOLID;
 936             req_dash = (wxDash*)NULL;
 937             req_nb_dash = 0;
 938             break;
 939         }
 940     }
 941
 942     if (req_dash && req_nb_dash)
 943     {
 944         char *real_req_dash = new char[req_nb_dash];
 945         if (real_req_dash)
 946         {
 947             for (int i = 0; i < req_nb_dash; i++)
 948                 real_req_dash[i] = req_dash[i] * width;
 949             gdk_gc_set_dashes( m_penGC, 0, real_req_dash, req_nb_dash );
 950             delete[] real_req_dash;
 951         }
 952         else
 953         {
 954             // No Memory. We use non-scaled dash pattern...
 955             gdk_gc_set_dashes( m_penGC, 0, (char*)req_dash, req_nb_dash );
 956         }
 957     }
 958
 959     GdkCapStyle capStyle = GDK_CAP_ROUND;
 960     switch (m_pen.GetCap())
 961     {
 962         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
 963         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
 964         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
 965     }
 966
 967     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
 968     switch (m_pen.GetJoin())
 969     {
 970         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
 971         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
 972         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
 973     }
 974
 975     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
 976
 977     m_pen.GetColour().CalcPixel( m_cmap );
 978     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
 979 }
 980
 981 void wxWindowDC::SetBrush( const wxBrush &brush )
 982 {
 983     wxCHECK_RET( Ok(), _T("invalid window dc") );
 984
 985     if (m_brush == brush) return;
 986
 987     m_brush = brush;
 988
 989     if (!m_brush.Ok()) return;
 990
 991     if (!m_window) return;
 992
 993     m_brush.GetColour().CalcPixel( m_cmap );
 994     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
 995
 996     GdkFill fillStyle = GDK_SOLID;
 997     switch (m_brush.GetStyle())
 998     {
 999       case wxSOLID:
1000       case wxTRANSPARENT:
1001          break;
1002       default:
1003          fillStyle = GDK_STIPPLED;
1004     }
1005
1006     gdk_gc_set_fill( m_brushGC, fillStyle );
1007
1008     if ((m_brush.GetStyle() == wxSTIPPLE) && (m_brush.GetStipple()->Ok()))
1009     {
1010         if (m_brush.GetStipple()->GetPixmap())
1011             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetPixmap() );
1012         else
1013             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetBitmap() );
1014     }
1015
1016     if (IS_HATCH(m_brush.GetStyle()))
1017     {
1018         int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
1019         gdk_gc_set_stipple( m_brushGC, hatches[num] );
1020     }
1021 }
1022
1023 void wxWindowDC::SetBackground( const wxBrush &brush )
1024 {
1025    /* CMB 21/7/98: Added SetBackground. Sets background brush
1026     * for Clear() and bg colour for shapes filled with cross-hatch brush */
1027
1028     wxCHECK_RET( Ok(), _T("invalid window dc") );
1029
1030     if (m_backgroundBrush == brush) return;
1031
1032     m_backgroundBrush = brush;
1033
1034     if (!m_backgroundBrush.Ok()) return;
1035
1036     if (!m_window) return;
1037
1038     m_backgroundBrush.GetColour().CalcPixel( m_cmap );
1039     gdk_gc_set_background( m_brushGC, m_backgroundBrush.GetColour().GetColor() );
1040     gdk_gc_set_background( m_penGC, m_backgroundBrush.GetColour().GetColor() );
1041     gdk_gc_set_background( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1042     gdk_gc_set_foreground( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1043
1044     GdkFill fillStyle = GDK_SOLID;
1045     switch (m_backgroundBrush.GetStyle())
1046     {
1047         case wxSOLID:
1048         case wxTRANSPARENT:
1049             break;
1050         default:
1051             fillStyle = GDK_STIPPLED;
1052     }
1053
1054     gdk_gc_set_fill( m_bgGC, fillStyle );
1055
1056     if (m_backgroundBrush.GetStyle() == wxSTIPPLE)
1057     {
1058         gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
1059     }
1060
1061     if (IS_HATCH(m_backgroundBrush.GetStyle()))
1062     {
1063         int num = m_backgroundBrush.GetStyle() - wxBDIAGONAL_HATCH;
1064         gdk_gc_set_stipple( m_bgGC, hatches[num] );
1065     }
1066 }
1067
1068 void wxWindowDC::SetLogicalFunction( int function )
1069 {
1070     wxCHECK_RET( Ok(), _T("invalid window dc") );
1071
1072     if (m_logicalFunction == function) return;
1073
1074     GdkFunction mode = GDK_COPY;
1075     switch (function)
1076     {
1077         case wxXOR:          mode = GDK_XOR;           break;
1078         case wxINVERT:       mode = GDK_INVERT;        break;
1079 #if (GTK_MINOR_VERSION > 0)
1080         case wxOR_REVERSE:   mode = GDK_OR_REVERSE;    break;
1081         case wxAND_REVERSE:  mode = GDK_AND_REVERSE;   break;
1082         case wxCLEAR:        mode = GDK_CLEAR;         break;
1083         case wxSET:          mode = GDK_SET;           break;
1084         case wxOR_INVERT:    mode = GDK_OR_INVERT;     break;
1085         case wxSRC_AND:
1086         case wxAND:          mode = GDK_AND;           break;
1087         case wxSRC_OR:
1088         case wxOR:           mode = GDK_OR;            break;
1089         case wxEQUIV:        mode = GDK_EQUIV;         break;
1090         case wxNAND:         mode = GDK_NAND;          break;
1091         case wxAND_INVERT:   mode = GDK_AND_INVERT;    break;
1092         case wxCOPY:         mode = GDK_COPY;          break;
1093         case wxNO_OP:        mode = GDK_NOOP;          break;
1094         case wxSRC_INVERT:   mode = GDK_COPY_INVERT;   break;
1095 #endif
1096         default:
1097         {
1098            wxFAIL_MSG( _T("unsupported logical function") );
1099            break;
1100         }
1101     }
1102
1103     m_logicalFunction = function;
1104
1105     if (!m_window) return;
1106
1107     gdk_gc_set_function( m_penGC, mode );
1108     gdk_gc_set_function( m_brushGC, mode );
1109     gdk_gc_set_function( m_textGC, mode );
1110 }
1111
1112 void wxWindowDC::SetTextForeground( const wxColour &col )
1113 {
1114     wxCHECK_RET( Ok(), _T("invalid window dc") );
1115
1116     if (m_textForegroundColour == col) return;
1117
1118     m_textForegroundColour = col;
1119     if (!m_textForegroundColour.Ok()) return;
1120
1121     if (!m_window) return;
1122
1123     m_textForegroundColour.CalcPixel( m_cmap );
1124     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
1125 }
1126
1127 void wxWindowDC::SetTextBackground( const wxColour &col )
1128 {
1129     wxCHECK_RET( Ok(), _T("invalid window dc") );
1130
1131     if (m_textBackgroundColour == col) return;
1132
1133     m_textBackgroundColour = col;
1134     if (!m_textBackgroundColour.Ok()) return;
1135
1136     if (!m_window) return;
1137
1138     m_textBackgroundColour.CalcPixel( m_cmap );
1139     gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
1140 }
1141
1142 void wxWindowDC::SetBackgroundMode( int mode )
1143 {
1144     wxCHECK_RET( Ok(), _T("invalid window dc") );
1145
1146     m_backgroundMode = mode;
1147
1148     if (!m_window) return;
1149
1150     // CMB 21/7/98: fill style of cross-hatch brushes is affected by
1151     // transparent/solid background mode
1152
1153     if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
1154     {
1155         gdk_gc_set_fill( m_brushGC,
1156           (m_backgroundMode == wxTRANSPARENT) ? GDK_STIPPLED : GDK_OPAQUE_STIPPLED);
1157     }
1158 }
1159
1160 void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
1161 {
1162     wxFAIL_MSG( _T("wxWindowDC::SetPalette not implemented") );
1163 }
1164
1165 void wxWindowDC::DoSetClippingRegion( long x, long y, long width, long height )
1166 {
1167     wxCHECK_RET( Ok(), _T("invalid window dc") );
1168
1169     wxDC::DoSetClippingRegion( x, y, width, height );
1170
1171     if (!m_window) return;
1172
1173     GdkRectangle rect;
1174     rect.x = XLOG2DEV(x);
1175     rect.y = YLOG2DEV(y);
1176     rect.width = XLOG2DEVREL(width);
1177     rect.height = YLOG2DEVREL(height);
1178     gdk_gc_set_clip_rectangle( m_penGC, &rect );
1179     gdk_gc_set_clip_rectangle( m_brushGC, &rect );
1180     gdk_gc_set_clip_rectangle( m_textGC, &rect );
1181     gdk_gc_set_clip_rectangle( m_bgGC, &rect );
1182 }
1183
1184 void wxWindowDC::DoSetClippingRegionAsRegion( const wxRegion &region  )
1185 {
1186     wxCHECK_RET( Ok(), _T("invalid window dc") );
1187
1188     if (region.Empty())
1189     {
1190         DestroyClippingRegion();
1191         return;
1192     }
1193
1194     if (!m_window) return;
1195
1196     gdk_gc_set_clip_region( m_penGC, region.GetRegion() );
1197     gdk_gc_set_clip_region( m_brushGC, region.GetRegion() );
1198     gdk_gc_set_clip_region( m_textGC, region.GetRegion() );
1199     gdk_gc_set_clip_region( m_bgGC, region.GetRegion() );
1200 }
1201
1202 void wxWindowDC::DestroyClippingRegion()
1203 {
1204     wxCHECK_RET( Ok(), _T("invalid window dc") );
1205
1206     wxDC::DestroyClippingRegion();
1207
1208     if (!m_window) return;
1209
1210     gdk_gc_set_clip_rectangle( m_penGC, (GdkRectangle *) NULL );
1211     gdk_gc_set_clip_rectangle( m_brushGC, (GdkRectangle *) NULL );
1212     gdk_gc_set_clip_rectangle( m_textGC, (GdkRectangle *) NULL );
1213     gdk_gc_set_clip_rectangle( m_bgGC, (GdkRectangle *) NULL );
1214 }
1215
1216 void wxWindowDC::SetUpDC()
1217 {
1218     Destroy();
1219     m_ok = TRUE;
1220     m_logicalFunction = wxCOPY;
1221     m_penGC = gdk_gc_new( m_window );
1222     m_brushGC = gdk_gc_new( m_window );
1223     m_textGC = gdk_gc_new( m_window );
1224     m_bgGC = gdk_gc_new( m_window );
1225
1226     wxColour tmp_col( m_textForegroundColour );
1227     m_textForegroundColour = wxNullColour;
1228     SetTextForeground( tmp_col );
1229     tmp_col = m_textBackgroundColour;
1230     m_textBackgroundColour = wxNullColour;
1231     SetTextBackground( tmp_col );
1232
1233     wxPen tmp_pen( m_pen );
1234     m_pen = wxNullPen;
1235     SetPen( tmp_pen );
1236
1237     wxFont tmp_font( m_font );
1238     m_font = wxNullFont;
1239     SetFont( tmp_font );
1240
1241     wxBrush tmp_brush( m_brush );
1242     m_brush = wxNullBrush;
1243     SetBrush( tmp_brush );
1244
1245 /*
1246     tmp_brush = m_backgroundBrush;
1247     m_backgroundBrush = wxNullBrush;
1248     SetBackground( tmp_brush );
1249 */
1250     tmp_brush = m_backgroundBrush;
1251     m_backgroundBrush = wxNullBrush;
1252     SetBackground( *wxWHITE_BRUSH );
1253     m_backgroundBrush = tmp_brush;
1254
1255     if (!hatch_bitmap)
1256     {
1257         hatch_bitmap    = hatches;
1258         hatch_bitmap[0] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, bdiag_bits, bdiag_width, bdiag_height );
1259         hatch_bitmap[1] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cdiag_bits, cdiag_width, cdiag_height );
1260         hatch_bitmap[2] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, fdiag_bits, fdiag_width, fdiag_height );
1261         hatch_bitmap[3] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cross_bits, cross_width, cross_height );
1262         hatch_bitmap[4] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, horiz_bits, horiz_width, horiz_height );
1263         hatch_bitmap[5] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, verti_bits, verti_width, verti_height );
1264     }
1265 }
1266
1267 void wxWindowDC::Destroy()
1268 {
1269     if (m_penGC) gdk_gc_unref( m_penGC );
1270     m_penGC = (GdkGC*) NULL;
1271     if (m_brushGC) gdk_gc_unref( m_brushGC );
1272     m_brushGC = (GdkGC*) NULL;
1273     if (m_textGC) gdk_gc_unref( m_textGC );
1274     m_textGC = (GdkGC*) NULL;
1275     if (m_bgGC) gdk_gc_unref( m_bgGC );
1276     m_bgGC = (GdkGC*) NULL;
1277 }
1278
1279 void wxWindowDC::ComputeScaleAndOrigin()
1280 {
1281     /* CMB: copy scale to see if it changes */
1282     double origScaleX = m_scaleX;
1283     double origScaleY = m_scaleY;
1284
1285     wxDC::ComputeScaleAndOrigin();
1286
1287     /* CMB: if scale has changed call SetPen to recalulate the line width */
1288     if ((m_scaleX != origScaleX || m_scaleY != origScaleY) &&
1289         (m_pen.Ok()))
1290     {
1291       /* this is a bit artificial, but we need to force wxDC to think
1292          the pen has changed */
1293       wxPen pen = m_pen;
1294       m_pen = wxNullPen;
1295       SetPen( pen );
1296   }
1297 }
1298
1299 // Resolution in pixels per logical inch
1300 wxSize wxWindowDC::GetPPI() const
1301 {
1302     return wxSize(100, 100);
1303 }
1304
1305 int wxWindowDC::GetDepth() const
1306 {
1307     wxFAIL_MSG(_T("not implemented"));
1308
1309     return -1;
1310 }
1311
1312 #if wxUSE_SPLINES
1313 // ----------------------------------- spline code ----------------------------------------
1314
1315 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1316                          double a3, double b3, double a4, double b4);
1317 void wx_clear_stack();
1318 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1319         double *y3, double *x4, double *y4);
1320 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1321           double x4, double y4);
1322 static bool wx_spline_add_point(double x, double y);
1323 static void wx_spline_draw_point_array(wxDC *dc);
1324
1325 wxList wx_spline_point_list;
1326
1327 #define                half(z1, z2)        ((z1+z2)/2.0)
1328 #define                THRESHOLD        5
1329
1330 /* iterative version */
1331
1332 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1333                  double b4)
1334 {
1335     register double  xmid, ymid;
1336     double           x1, y1, x2, y2, x3, y3, x4, y4;
1337
1338     wx_clear_stack();
1339     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1340
1341     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1342         xmid = (double)half(x2, x3);
1343         ymid = (double)half(y2, y3);
1344         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1345             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1346             wx_spline_add_point( x1, y1 );
1347             wx_spline_add_point( xmid, ymid );
1348         } else {
1349             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1350                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1351             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1352                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1353         }
1354     }
1355 }
1356
1357 /* utilities used by spline drawing routines */
1358
1359 typedef struct wx_spline_stack_struct {
1360     double           x1, y1, x2, y2, x3, y3, x4, y4;
1361 } Stack;
1362
1363 #define         SPLINE_STACK_DEPTH             20
1364 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1365 static Stack   *wx_stack_top;
1366 static int      wx_stack_count;
1367
1368 void wx_clear_stack()
1369 {
1370     wx_stack_top = wx_spline_stack;
1371     wx_stack_count = 0;
1372 }
1373
1374 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1375 {
1376     wx_stack_top->x1 = x1;
1377     wx_stack_top->y1 = y1;
1378     wx_stack_top->x2 = x2;
1379     wx_stack_top->y2 = y2;
1380     wx_stack_top->x3 = x3;
1381     wx_stack_top->y3 = y3;
1382     wx_stack_top->x4 = x4;
1383     wx_stack_top->y4 = y4;
1384     wx_stack_top++;
1385     wx_stack_count++;
1386 }
1387
1388 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1389                   double *x3, double *y3, double *x4, double *y4)
1390 {
1391     if (wx_stack_count == 0)
1392         return (0);
1393     wx_stack_top--;
1394     wx_stack_count--;
1395     *x1 = wx_stack_top->x1;
1396     *y1 = wx_stack_top->y1;
1397     *x2 = wx_stack_top->x2;
1398     *y2 = wx_stack_top->y2;
1399     *x3 = wx_stack_top->x3;
1400     *y3 = wx_stack_top->y3;
1401     *x4 = wx_stack_top->x4;
1402     *y4 = wx_stack_top->y4;
1403     return (1);
1404 }
1405
1406 static bool wx_spline_add_point(double x, double y)
1407 {
1408   wxPoint *point = new wxPoint ;
1409   point->x = (int) x;
1410   point->y = (int) y;
1411   wx_spline_point_list.Append((wxObject*)point);
1412   return TRUE;
1413 }
1414
1415 static void wx_spline_draw_point_array(wxDC *dc)
1416 {
1417   dc->DrawLines(&wx_spline_point_list, 0, 0 );
1418   wxNode *node = wx_spline_point_list.First();
1419   while (node)
1420   {
1421     wxPoint *point = (wxPoint *)node->Data();
1422     delete point;
1423     delete node;
1424     node = wx_spline_point_list.First();
1425   }
1426 }
1427
1428 void wxWindowDC::DoDrawSpline( wxList *points )
1429 {
1430     wxCHECK_RET( Ok(), _T("invalid window dc") );
1431
1432     wxPoint *p;
1433     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1434     double           x1, y1, x2, y2;
1435
1436     wxNode *node = points->First();
1437     p = (wxPoint *)node->Data();
1438
1439     x1 = p->x;
1440     y1 = p->y;
1441
1442     node = node->Next();
1443     p = (wxPoint *)node->Data();
1444
1445     x2 = p->x;
1446     y2 = p->y;
1447     cx1 = (double)((x1 + x2) / 2);
1448     cy1 = (double)((y1 + y2) / 2);
1449     cx2 = (double)((cx1 + x2) / 2);
1450     cy2 = (double)((cy1 + y2) / 2);
1451
1452     wx_spline_add_point(x1, y1);
1453
1454     while ((node = node->Next()) != NULL)
1455     {
1456         p = (wxPoint *)node->Data();
1457         x1 = x2;
1458         y1 = y2;
1459         x2 = p->x;
1460         y2 = p->y;
1461         cx4 = (double)(x1 + x2) / 2;
1462         cy4 = (double)(y1 + y2) / 2;
1463         cx3 = (double)(x1 + cx4) / 2;
1464         cy3 = (double)(y1 + cy4) / 2;
1465
1466         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1467
1468         cx1 = cx4;
1469         cy1 = cy4;
1470         cx2 = (double)(cx1 + x2) / 2;
1471         cy2 = (double)(cy1 + y2) / 2;
1472     }
1473
1474     wx_spline_add_point( cx1, cy1 );
1475     wx_spline_add_point( x2, y2 );
1476
1477     wx_spline_draw_point_array( this );
1478 }
1479
1480 #endif // wxUSE_SPLINE
1481
1482 //-----------------------------------------------------------------------------
1483 // wxPaintDC
1484 //-----------------------------------------------------------------------------
1485
1486 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC,wxWindowDC)
1487
1488 wxPaintDC::wxPaintDC()
1489   : wxWindowDC()
1490 {
1491 }
1492
1493 wxPaintDC::wxPaintDC( wxWindow *win )
1494   : wxWindowDC( win )
1495 {
1496 }
1497
1498 //-----------------------------------------------------------------------------
1499 // wxClientDC
1500 //-----------------------------------------------------------------------------
1501
1502 IMPLEMENT_DYNAMIC_CLASS(wxClientDC,wxWindowDC)
1503
1504 wxClientDC::wxClientDC()
1505   : wxWindowDC()
1506 {
1507 }
1508
1509 wxClientDC::wxClientDC( wxWindow *win )
1510   : wxWindowDC( win )
1511 {
1512 }
1513