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>
  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 (GTK_MINOR_VERSION > 0)
 943     if (req_dash && req_nb_dash)
 944     {
 945         char *real_req_dash = new char[req_nb_dash];
 946         if (real_req_dash)
 947         {
 948             for (int i = 0; i < req_nb_dash; i++)
 949                 real_req_dash[i] = req_dash[i] * width;
 950             gdk_gc_set_dashes( m_penGC, 0, real_req_dash, req_nb_dash );
 951             delete[] real_req_dash;
 952         }
 953         else
 954         {
 955             // No Memory. We use non-scaled dash pattern...
 956             gdk_gc_set_dashes( m_penGC, 0, (char*)req_dash, req_nb_dash );
 957         }
 958     }
 959 #endif
 960
 961     GdkCapStyle capStyle = GDK_CAP_ROUND;
 962     switch (m_pen.GetCap())
 963     {
 964         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
 965         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
 966         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
 967     }
 968
 969     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
 970     switch (m_pen.GetJoin())
 971     {
 972         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
 973         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
 974         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
 975     }
 976
 977     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
 978
 979     m_pen.GetColour().CalcPixel( m_cmap );
 980     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
 981 }
 982
 983 void wxWindowDC::SetBrush( const wxBrush &brush )
 984 {
 985     wxCHECK_RET( Ok(), _T("invalid window dc") );
 986
 987     if (m_brush == brush) return;
 988
 989     m_brush = brush;
 990
 991     if (!m_brush.Ok()) return;
 992
 993     if (!m_window) return;
 994
 995     m_brush.GetColour().CalcPixel( m_cmap );
 996     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
 997
 998     GdkFill fillStyle = GDK_SOLID;
 999     switch (m_brush.GetStyle())
1000     {
1001       case wxSOLID:
1002       case wxTRANSPARENT:
1003          break;
1004       default:
1005          fillStyle = GDK_STIPPLED;
1006     }
1007
1008     gdk_gc_set_fill( m_brushGC, fillStyle );
1009
1010     if ((m_brush.GetStyle() == wxSTIPPLE) && (m_brush.GetStipple()->Ok()))
1011     {
1012         if (m_brush.GetStipple()->GetPixmap())
1013             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetPixmap() );
1014         else
1015             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetBitmap() );
1016     }
1017
1018     if (IS_HATCH(m_brush.GetStyle()))
1019     {
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     GdkFill fillStyle = GDK_SOLID;
1047     switch (m_backgroundBrush.GetStyle())
1048     {
1049         case wxSOLID:
1050         case wxTRANSPARENT:
1051             break;
1052         default:
1053             fillStyle = GDK_STIPPLED;
1054     }
1055
1056     gdk_gc_set_fill( m_bgGC, fillStyle );
1057
1058     if (m_backgroundBrush.GetStyle() == wxSTIPPLE)
1059     {
1060         gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
1061     }
1062
1063     if (IS_HATCH(m_backgroundBrush.GetStyle()))
1064     {
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