src/gtk1/dcclient.cpp

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