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
 308         if (m_window)
 309             gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 310
 311         CalcBoundingBox( points[i+1].x + xoffset, points[i+1].y + yoffset );
 312     }
 313 }
 314
 315 void wxWindowDC::DoDrawPolygon( int n, wxPoint points[], long xoffset, long yoffset, int WXUNUSED(fillStyle) )
 316 {
 317     wxCHECK_RET( Ok(), _T("invalid window dc") );
 318
 319     if (n <= 0) return;
 320
 321     GdkPoint *gdkpoints = new GdkPoint[n+1];
 322     int i;
 323     for (i = 0 ; i < n ; i++)
 324     {
 325         gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
 326         gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
 327
 328         CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset );
 329     }
 330
 331     if ((m_brush.GetStyle() != wxTRANSPARENT) && m_window)
 332         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 333
 334     // To do: Fillstyle
 335
 336     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 337     {
 338         for (i = 0 ; i < n ; i++)
 339         {
 340             gdk_draw_line( m_window, m_penGC,
 341                            gdkpoints[i%n].x,
 342                            gdkpoints[i%n].y,
 343                            gdkpoints[(i+1)%n].x,
 344                            gdkpoints[(i+1)%n].y);
 345         }
 346     }
 347
 348     delete[] gdkpoints;
 349 }
 350
 351 void wxWindowDC::DoDrawRectangle( long x, long y, long width, long height )
 352 {
 353     wxCHECK_RET( Ok(), _T("invalid window dc") );
 354
 355     long xx = XLOG2DEV(x);
 356     long yy = YLOG2DEV(y);
 357     long ww = m_signX * XLOG2DEVREL(width);
 358     long hh = m_signY * YLOG2DEVREL(height);
 359
 360     // CMB: draw nothing if transformed w or h is 0
 361     if (ww == 0 || hh == 0) return;
 362
 363     // CMB: handle -ve width and/or height
 364     if (ww < 0) { ww = -ww; xx = xx - ww; }
 365     if (hh < 0) { hh = -hh; yy = yy - hh; }
 366
 367     if (m_window)
 368     {
 369         if (m_brush.GetStyle() != wxTRANSPARENT)
 370             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 371
 372         if (m_pen.GetStyle() != wxTRANSPARENT)
 373             gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 374     }
 375
 376     CalcBoundingBox( x, y );
 377     CalcBoundingBox( x + width, y + height );
 378 }
 379
 380 void wxWindowDC::DoDrawRoundedRectangle( long x, long y, long width, long height, double radius )
 381 {
 382     wxCHECK_RET( Ok(), _T("invalid window dc") );
 383
 384     if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 385
 386     long xx = XLOG2DEV(x);
 387     long yy = YLOG2DEV(y);
 388     long ww = m_signX * XLOG2DEVREL(width);
 389     long hh = m_signY * YLOG2DEVREL(height);
 390     long rr = XLOG2DEVREL((long)radius);
 391
 392     // CMB: handle -ve width and/or height
 393     if (ww < 0) { ww = -ww; xx = xx - ww; }
 394     if (hh < 0) { hh = -hh; yy = yy - hh; }
 395
 396     // CMB: if radius is zero use DrawRectangle() instead to avoid
 397     // X drawing errors with small radii
 398     if (rr == 0)
 399     {
 400         DrawRectangle( x, y, width, height );
 401         return;
 402     }
 403
 404     // CMB: draw nothing if transformed w or h is 0
 405     if (ww == 0 || hh == 0) return;
 406
 407     // CMB: adjust size if outline is drawn otherwise the result is
 408     // 1 pixel too wide and high
 409     if (m_pen.GetStyle() != wxTRANSPARENT)
 410     {
 411         ww--;
 412         hh--;
 413     }
 414
 415     if (m_window)
 416     {
 417         // CMB: ensure dd is not larger than rectangle otherwise we
 418         // get an hour glass shape
 419         long dd = 2 * rr;
 420         if (dd > ww) dd = ww;
 421         if (dd > hh) dd = hh;
 422         rr = dd / 2;
 423
 424         if (m_brush.GetStyle() != wxTRANSPARENT)
 425         {
 426             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 427             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 428             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 429             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 430             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 431             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 432         }
 433
 434         if (m_pen.GetStyle() != wxTRANSPARENT)
 435         {
 436             gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 437             gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 438             gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 439             gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 440             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 441             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 442             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 443             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 444         }
 445     }
 446
 447     // this ignores the radius
 448     CalcBoundingBox( x, y );
 449     CalcBoundingBox( x + width, y + height );
 450 }
 451
 452 void wxWindowDC::DoDrawEllipse( long x, long y, long width, long height )
 453 {
 454     wxCHECK_RET( Ok(), _T("invalid window dc") );
 455
 456     long xx = XLOG2DEV(x);
 457     long yy = YLOG2DEV(y);
 458     long ww = m_signX * XLOG2DEVREL(width);
 459     long hh = m_signY * YLOG2DEVREL(height);
 460
 461     // CMB: handle -ve width and/or height
 462     if (ww < 0) { ww = -ww; xx = xx - ww; }
 463     if (hh < 0) { hh = -hh; yy = yy - hh; }
 464
 465     if (m_window)
 466     {
 467         if (m_brush.GetStyle() != wxTRANSPARENT)
 468             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 469
 470         if (m_pen.GetStyle() != wxTRANSPARENT)
 471             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 472     }
 473
 474     CalcBoundingBox( x - width, y - height );
 475     CalcBoundingBox( x + width, y + height );
 476 }
 477
 478 void wxWindowDC::DoDrawIcon( const wxIcon &icon, long x, long y )
 479 {
 480     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 481     DoDrawBitmap( (const wxBitmap&)icon, x, y, (bool)TRUE );
 482 }
 483
 484 void wxWindowDC::DoDrawBitmap( const wxBitmap &bitmap,
 485                                long x, long y,
 486                                bool useMask )
 487 {
 488     wxCHECK_RET( Ok(), _T("invalid window dc") );
 489
 490     wxCHECK_RET( bitmap.Ok(), _T("invalid bitmap") );
 491
 492     /* scale/translate size and position */
 493
 494     int xx = XLOG2DEV(x);
 495     int yy = YLOG2DEV(y);
 496
 497     int w = bitmap.GetWidth();
 498     int h = bitmap.GetHeight();
 499
 500     CalcBoundingBox( x, y );
 501     CalcBoundingBox( x + w, y + h );
 502
 503     if (!m_window) return;
 504
 505     int ww = XLOG2DEVREL(w);
 506     int hh = YLOG2DEVREL(h);
 507
 508     /* scale bitmap if required */
 509
 510     wxBitmap use_bitmap;
 511
 512     if ((w != ww) || (h != hh))
 513     {
 514         wxImage image( bitmap );
 515         image = image.Scale( ww, hh );
 516
 517         use_bitmap = image.ConvertToBitmap();
 518     }
 519     else
 520     {
 521         use_bitmap = bitmap;
 522     }
 523
 524     /* apply mask if any */
 525
 526     GdkBitmap *mask = (GdkBitmap *) NULL;
 527     if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 528
 529     if (useMask && mask)
 530     {
 531         gdk_gc_set_clip_mask( m_penGC, mask );
 532         gdk_gc_set_clip_origin( m_penGC, xx, yy );
 533     }
 534
 535     /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 536
 537     GdkPixmap *pm = use_bitmap.GetPixmap();
 538     if (pm)
 539     {
 540         gdk_draw_pixmap( m_window, m_penGC, pm, 0, 0, xx, yy, -1, -1 );
 541     }
 542     else
 543     {
 544         GdkBitmap *bm = use_bitmap.GetBitmap();
 545         if (bm)
 546         {
 547             gdk_draw_bitmap( m_window, m_penGC, bm, 0, 0, xx, yy, -1, -1 );
 548         }
 549     }
 550
 551     /* remove mask again if any */
 552
 553     if (useMask && mask)
 554     {
 555         gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 556         gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 557     }
 558 }
 559
 560 bool wxWindowDC::DoBlit( long xdest, long ydest, long width, long height,
 561                          wxDC *source, long xsrc, long ysrc,
 562                          int logical_func, bool useMask )
 563 {
 564    /* this is the nth try to get this utterly useless function to
 565       work. it now completely ignores the scaling or translation
 566       of the source dc, but scales correctly on the target dc and
 567       knows about possible mask information in a memory dc. */
 568
 569     wxCHECK_MSG( Ok(), FALSE, _T("invalid window dc") );
 570
 571     wxCHECK_MSG( source, FALSE, _T("invalid source dc") );
 572
 573     if (!m_window) return FALSE;
 574
 575     wxClientDC *srcDC = (wxClientDC*)source;
 576     wxMemoryDC *memDC = (wxMemoryDC*)source;
 577
 578     bool use_bitmap_method = FALSE;
 579
 580     if (srcDC->m_isMemDC)
 581     {
 582         if (!memDC->m_selected.Ok()) return FALSE;
 583
 584         /* we use the "XCopyArea" way to copy a memory dc into
 585            y different window if the memory dc BOTH
 586            a) doesn't have any mask or its mask isn't used
 587            b) it is clipped
 588            c) is not 1-bit */
 589
 590         if (useMask && (memDC->m_selected.GetMask()))
 591         {
 592            /* we HAVE TO use the direct way for memory dcs
 593               that have mask since the XCopyArea doesn't know
 594               about masks */
 595             use_bitmap_method = TRUE;
 596         }
 597         else if (memDC->m_selected.GetDepth() == 1)
 598         {
 599            /* we HAVE TO use the direct way for memory dcs
 600               that are bitmaps because XCopyArea doesn't cope
 601               with different bit depths */
 602             use_bitmap_method = TRUE;
 603         }
 604         else if ((xsrc == 0) && (ysrc == 0) &&
 605                  (width == memDC->m_selected.GetWidth()) &&
 606                  (height == memDC->m_selected.GetHeight()))
 607         {
 608            /* we SHOULD use the direct way if all of the bitmap
 609               in the memory dc is copied in which case XCopyArea
 610               wouldn't be able able to boost performace by reducing
 611               the area to be scaled */
 612             use_bitmap_method = TRUE;
 613         }
 614         else
 615         {
 616             use_bitmap_method = FALSE;
 617         }
 618     }
 619
 620     CalcBoundingBox( xdest, ydest );
 621     CalcBoundingBox( xdest + width, ydest + height );
 622
 623     int old_logical_func = m_logicalFunction;
 624     SetLogicalFunction( logical_func );
 625
 626     if (use_bitmap_method)
 627     {
 628         /* scale/translate bitmap size */
 629
 630         long bm_width = memDC->m_selected.GetWidth();
 631         long bm_height = memDC->m_selected.GetHeight();
 632
 633         long bm_ww = XLOG2DEVREL( bm_width );
 634         long bm_hh = YLOG2DEVREL( bm_height );
 635
 636         /* scale bitmap if required */
 637
 638         wxBitmap use_bitmap;
 639
 640         if ((bm_width != bm_ww) || (bm_height != bm_hh))
 641         {
 642             wxImage image( memDC->m_selected );
 643             image = image.Scale( bm_ww, bm_hh );
 644
 645             use_bitmap = image.ConvertToBitmap();
 646         }
 647         else
 648         {
 649             use_bitmap = memDC->m_selected;
 650         }
 651
 652         /* scale/translate size and position */
 653
 654         long xx = XLOG2DEV(xdest);
 655         long yy = YLOG2DEV(ydest);
 656
 657         long ww = XLOG2DEVREL(width);
 658         long hh = YLOG2DEVREL(height);
 659
 660         /* apply mask if any */
 661
 662         GdkBitmap *mask = (GdkBitmap *) NULL;
 663         if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 664
 665         if (useMask && mask)
 666         {
 667             gdk_gc_set_clip_mask( m_penGC, mask );
 668             gdk_gc_set_clip_origin( m_penGC, xx, yy );
 669         }
 670
 671         /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 672
 673         GdkPixmap *pm = use_bitmap.GetPixmap();
 674         if (pm)
 675         {
 676             gdk_draw_pixmap( m_window, m_penGC, pm, xsrc, ysrc, xx, yy, ww, hh );
 677         }
 678         else
 679         {
 680             GdkBitmap *bm = use_bitmap.GetBitmap();
 681             if (bm)
 682             {
 683                 /* we use the textGC here because blitting a bitmap is done
 684                    using the current text colour */
 685                 gdk_draw_bitmap( m_window, m_textGC, bm, xsrc, ysrc, xx, yy, ww, hh );
 686             }
 687         }
 688
 689         /* remove mask again if any */
 690
 691         if (useMask && mask)
 692         {
 693             gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 694             gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 695         }
 696     }
 697     else /* use_bitmap_method */
 698     {
 699         /* scale/translate size and position */
 700
 701         long xx = XLOG2DEV(xdest);
 702         long yy = YLOG2DEV(ydest);
 703
 704         long ww = XLOG2DEVREL(width);
 705         long hh = YLOG2DEVREL(height);
 706
 707         if ((width != ww) || (height != hh))
 708         {
 709             /* draw source window into a bitmap as we cannot scale
 710                a window in contrast to a bitmap. this would actually
 711                work with memory dcs as well, but we'd lose the mask
 712                information and waste one step in this process since
 713                a memory already has a bitmap. all this is slightly
 714                inefficient as we could take an XImage directly from
 715                an X window, but we'd then also have to care that
 716                the window is not outside the screen (in which case
 717                we'd get a BadMatch or what not).
 718                Is a double XGetImage and combined XGetPixel and
 719                XPutPixel really faster? I'm not sure. look at wxXt
 720                for a different implementation of the same problem. */
 721
 722             wxBitmap bitmap( width, height );
 723             gdk_window_copy_area( bitmap.GetPixmap(), m_penGC, 0, 0,
 724                                   srcDC->GetWindow(),
 725                                   xsrc, ysrc, width, height );
 726
 727             /* scale image */
 728
 729             wxImage image( bitmap );
 730             image = image.Scale( ww, hh );
 731
 732             /* convert to bitmap */
 733
 734             bitmap = image.ConvertToBitmap();
 735
 736             /* draw scaled bitmap */
 737
 738             gdk_draw_pixmap( m_window, m_penGC, bitmap.GetPixmap(), 0, 0, xx, yy, -1, -1 );
 739
 740         }
 741         else
 742         {
 743             /* no scaling and not a memory dc with a mask either */
 744
 745             gdk_window_copy_area( m_window, m_penGC, xx, yy,
 746                                   srcDC->GetWindow(),
 747                                   xsrc, ysrc, width, height );
 748         }
 749     }
 750
 751     SetLogicalFunction( old_logical_func );
 752     return TRUE;
 753 }
 754
 755 void wxWindowDC::DoDrawText( const wxString &text, long x, long y )
 756 {
 757     wxCHECK_RET( Ok(), _T("invalid window dc") );
 758
 759     if (!m_window) return;
 760
 761     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 762
 763     x = XLOG2DEV(x);
 764     y = YLOG2DEV(y);
 765
 766     /* CMB 21/5/98: draw text background if mode is wxSOLID */
 767     if (m_backgroundMode == wxSOLID)
 768     {
 769         long width = gdk_string_width( font, text.mbc_str() );
 770         long height = font->ascent + font->descent;
 771         gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 772         gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 773         gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 774     }
 775     gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text.mbc_str() );
 776
 777     /* CMB 17/7/98: simple underline: ignores scaling and underlying
 778        X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 779        properties (see wxXt implementation) */
 780     if (m_font.GetUnderlined())
 781     {
 782         long width = gdk_string_width( font, text.mbc_str() );
 783         long ul_y = y + font->ascent;
 784         if (font->descent > 0) ul_y++;
 785         gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 786     }
 787
 788     long w, h;
 789     GetTextExtent (text, &w, &h);
 790     CalcBoundingBox (x + w, y + h);
 791     CalcBoundingBox (x, y);
 792 }
 793
 794 void wxWindowDC::GetTextExtent( const wxString &string, long *width, long *height,
 795                                 long *descent, long *externalLeading,
 796                                 wxFont *theFont ) const
 797 {
 798     wxFont fontToUse = m_font;
 799     if (theFont) fontToUse = *theFont;
 800
 801     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 802     if (width) (*width) = long(gdk_string_width( font, string.mbc_str() ) / m_scaleX);
 803     if (height) (*height) = long((font->ascent + font->descent) / m_scaleY);
 804     if (descent) (*descent) = long(font->descent / m_scaleY);
 805     if (externalLeading) (*externalLeading) = 0;  // ??
 806 }
 807
 808 long wxWindowDC::GetCharWidth() const
 809 {
 810     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 811     return long(gdk_string_width( font, "H" ) / m_scaleX);
 812 }
 813
 814 long wxWindowDC::GetCharHeight() const
 815 {
 816     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 817     return long((font->ascent + font->descent) / m_scaleY);
 818 }
 819
 820 void wxWindowDC::Clear()
 821 {
 822     wxCHECK_RET( Ok(), _T("invalid window dc") );
 823
 824     if (!m_window) return;
 825
 826     /* - we either are a memory dc or have a window as the
 827        owner. anything else shouldn't happen.
 828        - we don't use gdk_window_clear() as we don't set
 829        the window's background colour anymore. it is too
 830        much pain to keep the DC's and the window's back-
 831        ground colour in synch. */
 832
 833     if (m_owner)
 834     {
 835         int width,height;
 836         m_owner->GetSize( &width, &height );
 837         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 838         return;
 839     }
 840
 841     if (m_isMemDC)
 842     {
 843         int width,height;
 844         GetSize( &width, &height );
 845         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 846         return;
 847     }
 848 }
 849
 850 void wxWindowDC::SetFont( const wxFont &font )
 851 {
 852     m_font = font;
 853 }
 854
 855 void wxWindowDC::SetPen( const wxPen &pen )
 856 {
 857     wxCHECK_RET( Ok(), _T("invalid window dc") );
 858
 859     if (m_pen == pen) return;
 860
 861     m_pen = pen;
 862
 863     if (!m_pen.Ok()) return;
 864
 865     if (!m_window) return;
 866
 867     gint width = m_pen.GetWidth();
 868     if (width <= 0)
 869     {
 870         // CMB: if width is non-zero scale it with the dc
 871         width = 1;
 872     }
 873     else
 874     {
 875         // X doesn't allow different width in x and y and so we take
 876         // the average
 877         double w = 0.5 + (abs(XLOG2DEVREL(width)) + abs(YLOG2DEVREL(width))) / 2.0;
 878         width = (int)w;
 879     }
 880
 881     const static char dotted[] = {1, 1};
 882     const static char short_dashed[] = {2, 2};
 883     const static char long_dashed[] = {2, 4};
 884     const static char dotted_dashed[] = {3, 3, 1, 3};
 885
 886     // We express dash pattern in pen width unit, so we are
 887     // independent of zoom factor and so on...
 888     int req_nb_dash;
 889     const char *req_dash;
 890
 891     GdkLineStyle lineStyle = GDK_LINE_SOLID;
 892     switch (m_pen.GetStyle())
 893     {
 894         case wxUSER_DASH:
 895         {
 896             lineStyle = GDK_LINE_ON_OFF_DASH;
 897             req_nb_dash = m_pen.GetDashCount();
 898             req_dash = m_pen.GetDash();
 899             break;
 900         }
 901         case wxDOT:
 902         {
 903             lineStyle = GDK_LINE_ON_OFF_DASH;
 904             req_nb_dash = 2;
 905             req_dash = dotted;
 906             break;
 907         }
 908         case wxLONG_DASH:
 909         {
 910             lineStyle = GDK_LINE_ON_OFF_DASH;
 911             req_nb_dash = 2;
 912             req_dash = long_dashed;
 913             break;
 914         }
 915         case wxSHORT_DASH:
 916         {
 917             lineStyle = GDK_LINE_ON_OFF_DASH;
 918             req_nb_dash = 2;
 919             req_dash = short_dashed;
 920             break;
 921         }
 922         case wxDOT_DASH:
 923         {
 924 //          lineStyle = GDK_LINE_DOUBLE_DASH;
 925             lineStyle = GDK_LINE_ON_OFF_DASH;
 926             req_nb_dash = 4;
 927             req_dash = dotted_dashed;
 928             break;
 929         }
 930
 931         case wxTRANSPARENT:
 932         case wxSTIPPLE:
 933         case wxSOLID:
 934         default:
 935         {
 936             lineStyle = GDK_LINE_SOLID;
 937             req_dash = (wxDash*)NULL;
 938             req_nb_dash = 0;
 939             break;
 940         }
 941     }
 942
 943 #if (GTK_MINOR_VERSION > 0)
 944     if (req_dash && req_nb_dash)
 945     {
 946         char *real_req_dash = new char[req_nb_dash];
 947         if (real_req_dash)
 948         {
 949             for (int i = 0; i < req_nb_dash; i++)
 950                 real_req_dash[i] = req_dash[i] * width;
 951             gdk_gc_set_dashes( m_penGC, 0, real_req_dash, req_nb_dash );
 952             delete[] real_req_dash;
 953         }
 954         else
 955         {
 956             // No Memory. We use non-scaled dash pattern...
 957             gdk_gc_set_dashes( m_penGC, 0, (char*)req_dash, req_nb_dash );
 958         }
 959     }
 960 #endif
 961
 962     GdkCapStyle capStyle = GDK_CAP_ROUND;
 963     switch (m_pen.GetCap())
 964     {
 965         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
 966         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
 967         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
 968     }
 969
 970     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
 971     switch (m_pen.GetJoin())
 972     {
 973         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
 974         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
 975         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
 976     }
 977
 978     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
 979
 980     m_pen.GetColour().CalcPixel( m_cmap );
 981     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
 982 }
 983
 984 void wxWindowDC::SetBrush( const wxBrush &brush )
 985 {
 986     wxCHECK_RET( Ok(), _T("invalid window dc") );
 987
 988     if (m_brush == brush) return;
 989
 990     m_brush = brush;
 991
 992     if (!m_brush.Ok()) return;
 993
 994     if (!m_window) return;
 995
 996     m_brush.GetColour().CalcPixel( m_cmap );
 997     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
 998
 999     gdk_gc_set_fill( m_brushGC, GDK_SOLID );
1000
1001     if ((m_brush.GetStyle() == wxSTIPPLE) && (m_brush.GetStipple()->Ok()))
1002     {
1003         if (m_brush.GetStipple()->GetPixmap())
1004         {
1005             gdk_gc_set_fill( m_brushGC, GDK_TILED );
1006             gdk_gc_set_tile( m_brushGC, m_brush.GetStipple()->GetPixmap() );
1007         }
1008         else
1009         {
1010             gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1011             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetBitmap() );
1012         }
1013     }
1014
1015     if (IS_HATCH(m_brush.GetStyle()))
1016     {
1017         gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
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     gdk_gc_set_fill( m_bgGC, GDK_SOLID );
1045
1046     if ((m_backgroundBrush.GetStyle() == wxSTIPPLE) && (m_backgroundBrush.GetStipple()->Ok()))
1047     {
1048         if (m_backgroundBrush.GetStipple()->GetPixmap())
1049         {
1050             gdk_gc_set_fill( m_bgGC, GDK_TILED );
1051             gdk_gc_set_tile( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
1052         }
1053         else
1054         {
1055             gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1056             gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetBitmap() );
1057         }
1058     }
1059
1060     if (IS_HATCH(m_backgroundBrush.GetStyle()))
1061     {
1062         gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
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