src/gtk/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcclient.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Markus Holzem, Chris Breeze
   7 // Licence:           wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "dcclient.h"
  12 #endif
  13
  14 #include "wx/dcclient.h"
  15 #include "wx/dcmemory.h"
  16 #include "wx/image.h"
  17 #include "wx/gtk/win_gtk.h"
  18 #include <math.h>               // for floating-point functions
  19
  20 #include "gdk/gdk.h"
  21 #include "gtk/gtk.h"
  22
  23 //-----------------------------------------------------------------------------
  24 // local data
  25 //-----------------------------------------------------------------------------
  26
  27 #include "bdiag.xbm"
  28 #include "fdiag.xbm"
  29 #include "cdiag.xbm"
  30 #include "horiz.xbm"
  31 #include "verti.xbm"
  32 #include "cross.xbm"
  33 #define  num_hatches 6
  34
  35 static GdkPixmap  *hatches[num_hatches];
  36 static GdkPixmap **hatch_bitmap = (GdkPixmap **) NULL;
  37
  38 //-----------------------------------------------------------------------------
  39 // constants
  40 //-----------------------------------------------------------------------------
  41
  42 #define RAD2DEG 57.2957795131
  43
  44 //-----------------------------------------------------------------------------
  45 // temporary implementation of the missing GDK function
  46 //-----------------------------------------------------------------------------
  47
  48 #include "gdk/gdkprivate.h"
  49
  50 void gdk_draw_bitmap     (GdkDrawable  *drawable,
  51                           GdkGC               *gc,
  52                           GdkDrawable  *src,
  53                           gint                xsrc,
  54                           gint                ysrc,
  55                           gint                xdest,
  56                           gint                ydest,
  57                           gint                width,
  58                           gint                height)
  59 {
  60     GdkWindowPrivate *drawable_private;
  61     GdkWindowPrivate *src_private;
  62     GdkGCPrivate *gc_private;
  63
  64     g_return_if_fail (drawable != NULL);
  65     g_return_if_fail (src != NULL);
  66     g_return_if_fail (gc != NULL);
  67
  68     drawable_private = (GdkWindowPrivate*) drawable;
  69     src_private = (GdkWindowPrivate*) src;
  70     if (drawable_private->destroyed || src_private->destroyed)
  71         return;
  72
  73     gc_private = (GdkGCPrivate*) gc;
  74
  75     if (width == -1) width = src_private->width;
  76     if (height == -1) height = src_private->height;
  77
  78     XCopyPlane( drawable_private->xdisplay,
  79                 src_private->xwindow,
  80                 drawable_private->xwindow,
  81                 gc_private->xgc,
  82                 xsrc, ysrc,
  83                 width, height,
  84                 xdest, ydest,
  85                 1 );
  86 }
  87
  88 //-----------------------------------------------------------------------------
  89 // wxWindowDC
  90 //-----------------------------------------------------------------------------
  91
  92 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  93
  94 wxWindowDC::wxWindowDC()
  95 {
  96     m_penGC = (GdkGC *) NULL;
  97     m_brushGC = (GdkGC *) NULL;
  98     m_textGC = (GdkGC *) NULL;
  99     m_bgGC = (GdkGC *) NULL;
 100     m_cmap = (GdkColormap *) NULL;
 101     m_isMemDC = FALSE;
 102     m_owner = (wxWindow *)NULL;
 103 }
 104
 105 wxWindowDC::wxWindowDC( wxWindow *window )
 106 {
 107     m_penGC = (GdkGC *) NULL;
 108     m_brushGC = (GdkGC *) NULL;
 109     m_textGC = (GdkGC *) NULL;
 110     m_bgGC = (GdkGC *) NULL;
 111     m_cmap = (GdkColormap *) NULL;
 112     m_owner = (wxWindow *)NULL;
 113     m_isMemDC = FALSE;
 114     m_font = window->GetFont();
 115
 116     wxASSERT_MSG( window, wxT("DC needs a window") );
 117
 118     GtkWidget *widget = window->m_wxwindow;
 119
 120     wxASSERT_MSG( widget, wxT("DC needs a widget") );
 121
 122     GtkMyFixed *myfixed = GTK_MYFIXED( widget );
 123     m_window = myfixed->bin_window;
 124
 125     /* not realized ? */
 126     if (!m_window)
 127     {
 128          /* don't report problems */
 129          m_ok = TRUE;
 130
 131          return;
 132     }
 133
 134     if (window->m_wxwindow)
 135         m_cmap = gtk_widget_get_colormap( window->m_wxwindow );
 136     else
 137         m_cmap = gtk_widget_get_colormap( window->m_widget );
 138
 139     SetUpDC();
 140
 141     /* this must be done after SetUpDC, bacause SetUpDC calls the
 142        repective SetBrush, SetPen, SetBackground etc functions
 143        to set up the DC. SetBackground call m_owner->SetBackground
 144        and this might not be desired as the standard dc background
 145        is white whereas a window might assume gray to be the
 146        standard (as e.g. wxStatusBar) */
 147
 148     m_owner = window;
 149 }
 150
 151 wxWindowDC::~wxWindowDC()
 152 {
 153     Destroy();
 154 }
 155
 156 void wxWindowDC::DoFloodFill( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 157                            const wxColour &WXUNUSED(col), int WXUNUSED(style) )
 158 {
 159     wxFAIL_MSG( wxT("wxWindowDC::DoFloodFill not implemented") );
 160 }
 161
 162 bool wxWindowDC::DoGetPixel( wxCoord WXUNUSED(x1), wxCoord WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
 163 {
 164     wxFAIL_MSG( wxT("wxWindowDC::DoGetPixel not implemented") );
 165     return FALSE;
 166 }
 167
 168 void wxWindowDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 169 {
 170     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 171
 172     if (m_pen.GetStyle() != wxTRANSPARENT)
 173     {
 174         if (m_window)
 175             gdk_draw_line( m_window, m_penGC, XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2) );
 176
 177         CalcBoundingBox(x1, y1);
 178         CalcBoundingBox(x2, y2);
 179     }
 180 }
 181
 182 void wxWindowDC::DoCrossHair( wxCoord x, wxCoord y )
 183 {
 184     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 185
 186     if (m_pen.GetStyle() != wxTRANSPARENT)
 187     {
 188         int w = 0;
 189         int h = 0;
 190         GetSize( &w, &h );
 191         wxCoord xx = XLOG2DEV(x);
 192         wxCoord yy = YLOG2DEV(y);
 193         if (m_window)
 194         {
 195             gdk_draw_line( m_window, m_penGC, 0, yy, XLOG2DEVREL(w), yy );
 196             gdk_draw_line( m_window, m_penGC, xx, 0, xx, YLOG2DEVREL(h) );
 197         }
 198     }
 199 }
 200
 201 void wxWindowDC::DoDrawArc( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2,
 202                             wxCoord xc, wxCoord yc )
 203 {
 204     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 205
 206     wxCoord xx1 = XLOG2DEV(x1);
 207     wxCoord yy1 = YLOG2DEV(y1);
 208     wxCoord xx2 = XLOG2DEV(x2);
 209     wxCoord yy2 = YLOG2DEV(y2);
 210     wxCoord xxc = XLOG2DEV(xc);
 211     wxCoord yyc = YLOG2DEV(yc);
 212     double dx = xx1 - xxc;
 213     double dy = yy1 - yyc;
 214     double radius = sqrt((double)(dx*dx+dy*dy));
 215     wxCoord   r      = (wxCoord)radius;
 216     double radius1, radius2;
 217
 218     if (xx1 == xx2 && yy1 == yy2)
 219     {
 220         radius1 = 0.0;
 221         radius2 = 360.0;
 222     }
 223     else
 224     if (radius == 0.0)
 225     {
 226         radius1 = radius2 = 0.0;
 227     }
 228     else
 229     {
 230         radius1 = (xx1 - xxc == 0) ?
 231             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 232             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 233         radius2 = (xx2 - xxc == 0) ?
 234             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 235             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 236     }
 237     wxCoord alpha1 = wxCoord(radius1 * 64.0);
 238     wxCoord alpha2 = wxCoord((radius2 - radius1) * 64.0);
 239     while (alpha2 <= 0) alpha2 += 360*64;
 240     while (alpha1 > 360*64) alpha1 -= 360*64;
 241
 242     if (m_window)
 243     {
 244         if (m_brush.GetStyle() != wxTRANSPARENT)
 245             gdk_draw_arc( m_window, m_brushGC, TRUE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 246
 247         if (m_pen.GetStyle() != wxTRANSPARENT)
 248             gdk_draw_arc( m_window, m_penGC, FALSE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 249     }
 250
 251     CalcBoundingBox (x1, y1);
 252     CalcBoundingBox (x2, y2);
 253 }
 254
 255 void wxWindowDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double sa, double ea )
 256 {
 257     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 258
 259     wxCoord xx = XLOG2DEV(x);
 260     wxCoord yy = YLOG2DEV(y);
 261     wxCoord ww = m_signX * XLOG2DEVREL(width);
 262     wxCoord hh = m_signY * YLOG2DEVREL(height);
 263
 264     // CMB: handle -ve width and/or height
 265     if (ww < 0) { ww = -ww; xx = xx - ww; }
 266     if (hh < 0) { hh = -hh; yy = yy - hh; }
 267
 268     if (m_window)
 269     {
 270         wxCoord start = wxCoord(sa * 64.0);
 271         wxCoord end = wxCoord(ea * 64.0);
 272
 273         if (m_brush.GetStyle() != wxTRANSPARENT)
 274             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, start, end );
 275
 276         if (m_pen.GetStyle() != wxTRANSPARENT)
 277             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, start, end );
 278     }
 279
 280     CalcBoundingBox (x, y);
 281     CalcBoundingBox (x + width, y + height);
 282 }
 283
 284 void wxWindowDC::DoDrawPoint( wxCoord x, wxCoord y )
 285 {
 286     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 287
 288     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 289         gdk_draw_point( m_window, m_penGC, XLOG2DEV(x), YLOG2DEV(y) );
 290
 291     CalcBoundingBox (x, y);
 292 }
 293
 294 void wxWindowDC::DoDrawLines( int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset )
 295 {
 296     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 297
 298     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 299     if (n <= 0) return;
 300
 301     CalcBoundingBox( points[0].x + xoffset, points[0].y + yoffset );
 302
 303     for (int i = 0; i < n-1; i++)
 304     {
 305         wxCoord x1 = XLOG2DEV(points[i].x + xoffset);
 306         wxCoord x2 = XLOG2DEV(points[i+1].x + xoffset);
 307         wxCoord y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 308         wxCoord y2 = YLOG2DEV(points[i+1].y + yoffset);
 309
 310         if (m_window)
 311             gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 312
 313         CalcBoundingBox( points[i+1].x + xoffset, points[i+1].y + yoffset );
 314     }
 315 }
 316
 317 void wxWindowDC::DoDrawPolygon( int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset, int WXUNUSED(fillStyle) )
 318 {
 319     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 320
 321     if (n <= 0) return;
 322
 323     GdkPoint *gdkpoints = new GdkPoint[n+1];
 324     int i;
 325     for (i = 0 ; i < n ; i++)
 326     {
 327         gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
 328         gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
 329
 330         CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset );
 331     }
 332
 333     if ((m_brush.GetStyle() != wxTRANSPARENT) && m_window)
 334         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 335
 336     // To do: Fillstyle
 337
 338     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 339     {
 340         for (i = 0 ; i < n ; i++)
 341         {
 342             gdk_draw_line( m_window, m_penGC,
 343                            gdkpoints[i%n].x,
 344                            gdkpoints[i%n].y,
 345                            gdkpoints[(i+1)%n].x,
 346                            gdkpoints[(i+1)%n].y);
 347         }
 348     }
 349
 350     delete[] gdkpoints;
 351 }
 352
 353 void wxWindowDC::DoDrawRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 354 {
 355     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 356
 357     wxCoord xx = XLOG2DEV(x);
 358     wxCoord yy = YLOG2DEV(y);
 359     wxCoord ww = m_signX * XLOG2DEVREL(width);
 360     wxCoord hh = m_signY * YLOG2DEVREL(height);
 361
 362     // CMB: draw nothing if transformed w or h is 0
 363     if (ww == 0 || hh == 0) return;
 364
 365     // CMB: handle -ve width and/or height
 366     if (ww < 0) { ww = -ww; xx = xx - ww; }
 367     if (hh < 0) { hh = -hh; yy = yy - hh; }
 368
 369     if (m_window)
 370     {
 371         if (m_brush.GetStyle() != wxTRANSPARENT)
 372             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 373
 374         if (m_pen.GetStyle() != wxTRANSPARENT)
 375             gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 376     }
 377
 378     CalcBoundingBox( x, y );
 379     CalcBoundingBox( x + width, y + height );
 380 }
 381
 382 void wxWindowDC::DoDrawRoundedRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
 383 {
 384     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 385
 386     if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 387
 388     wxCoord xx = XLOG2DEV(x);
 389     wxCoord yy = YLOG2DEV(y);
 390     wxCoord ww = m_signX * XLOG2DEVREL(width);
 391     wxCoord hh = m_signY * YLOG2DEVREL(height);
 392     wxCoord rr = XLOG2DEVREL((wxCoord)radius);
 393
 394     // CMB: handle -ve width and/or height
 395     if (ww < 0) { ww = -ww; xx = xx - ww; }
 396     if (hh < 0) { hh = -hh; yy = yy - hh; }
 397
 398     // CMB: if radius is zero use DrawRectangle() instead to avoid
 399     // X drawing errors with small radii
 400     if (rr == 0)
 401     {
 402         DrawRectangle( x, y, width, height );
 403         return;
 404     }
 405
 406     // CMB: draw nothing if transformed w or h is 0
 407     if (ww == 0 || hh == 0) return;
 408
 409     // CMB: adjust size if outline is drawn otherwise the result is
 410     // 1 pixel too wide and high
 411     if (m_pen.GetStyle() != wxTRANSPARENT)
 412     {
 413         ww--;
 414         hh--;
 415     }
 416
 417     if (m_window)
 418     {
 419         // CMB: ensure dd is not larger than rectangle otherwise we
 420         // get an hour glass shape
 421         wxCoord dd = 2 * rr;
 422         if (dd > ww) dd = ww;
 423         if (dd > hh) dd = hh;
 424         rr = dd / 2;
 425
 426         if (m_brush.GetStyle() != wxTRANSPARENT)
 427         {
 428             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 429             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 430             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 431             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 432             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 433             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 434         }
 435
 436         if (m_pen.GetStyle() != wxTRANSPARENT)
 437         {
 438             gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 439             gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 440             gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 441             gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 442             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 443             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 444             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 445             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 446         }
 447     }
 448
 449     // this ignores the radius
 450     CalcBoundingBox( x, y );
 451     CalcBoundingBox( x + width, y + height );
 452 }
 453
 454 void wxWindowDC::DoDrawEllipse( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 455 {
 456     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 457
 458     wxCoord xx = XLOG2DEV(x);
 459     wxCoord yy = YLOG2DEV(y);
 460     wxCoord ww = m_signX * XLOG2DEVREL(width);
 461     wxCoord hh = m_signY * YLOG2DEVREL(height);
 462
 463     // CMB: handle -ve width and/or height
 464     if (ww < 0) { ww = -ww; xx = xx - ww; }
 465     if (hh < 0) { hh = -hh; yy = yy - hh; }
 466
 467     if (m_window)
 468     {
 469         if (m_brush.GetStyle() != wxTRANSPARENT)
 470             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 471
 472         if (m_pen.GetStyle() != wxTRANSPARENT)
 473             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 474     }
 475
 476     CalcBoundingBox( x - width, y - height );
 477     CalcBoundingBox( x + width, y + height );
 478 }
 479
 480 void wxWindowDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
 481 {
 482     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 483     DoDrawBitmap( (const wxBitmap&)icon, x, y, (bool)TRUE );
 484 }
 485
 486 void wxWindowDC::DoDrawBitmap( const wxBitmap &bitmap,
 487                                wxCoord x, wxCoord y,
 488                                bool useMask )
 489 {
 490     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 491
 492     wxCHECK_RET( bitmap.Ok(), wxT("invalid bitmap") );
 493
 494     /* scale/translate size and position */
 495
 496     int xx = XLOG2DEV(x);
 497     int yy = YLOG2DEV(y);
 498
 499     int w = bitmap.GetWidth();
 500     int h = bitmap.GetHeight();
 501
 502     CalcBoundingBox( x, y );
 503     CalcBoundingBox( x + w, y + h );
 504
 505     if (!m_window) return;
 506
 507     int ww = XLOG2DEVREL(w);
 508     int hh = YLOG2DEVREL(h);
 509
 510     /* scale bitmap if required */
 511
 512     wxBitmap use_bitmap;
 513
 514     if ((w != ww) || (h != hh))
 515     {
 516         wxImage image( bitmap );
 517         image = image.Scale( ww, hh );
 518
 519         use_bitmap = image.ConvertToBitmap();
 520     }
 521     else
 522     {
 523         use_bitmap = bitmap;
 524     }
 525
 526     /* apply mask if any */
 527
 528     GdkBitmap *mask = (GdkBitmap *) NULL;
 529     if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 530
 531     if (useMask && mask)
 532     {
 533         gdk_gc_set_clip_mask( m_penGC, mask );
 534         gdk_gc_set_clip_origin( m_penGC, xx, yy );
 535     }
 536
 537     /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 538
 539     GdkPixmap *pm = use_bitmap.GetPixmap();
 540     if (pm)
 541     {
 542         gdk_draw_pixmap( m_window, m_penGC, pm, 0, 0, xx, yy, -1, -1 );
 543     }
 544     else
 545     {
 546         GdkBitmap *bm = use_bitmap.GetBitmap();
 547         if (bm)
 548         {
 549             gdk_draw_bitmap( m_window, m_penGC, bm, 0, 0, xx, yy, -1, -1 );
 550         }
 551     }
 552
 553     /* remove mask again if any */
 554
 555     if (useMask && mask)
 556     {
 557         gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 558         gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 559     }
 560 }
 561
 562 bool wxWindowDC::DoBlit( wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 563                          wxDC *source, wxCoord xsrc, wxCoord ysrc,
 564                          int logical_func, bool useMask )
 565 {
 566    /* this is the nth try to get this utterly useless function to
 567       work. it now completely ignores the scaling or translation
 568       of the source dc, but scales correctly on the target dc and
 569       knows about possible mask information in a memory dc. */
 570
 571     wxCHECK_MSG( Ok(), FALSE, wxT("invalid window dc") );
 572
 573     wxCHECK_MSG( source, FALSE, wxT("invalid source dc") );
 574
 575     if (!m_window) return FALSE;
 576
 577     wxClientDC *srcDC = (wxClientDC*)source;
 578     wxMemoryDC *memDC = (wxMemoryDC*)source;
 579
 580     bool use_bitmap_method = FALSE;
 581
 582     if (srcDC->m_isMemDC)
 583     {
 584         if (!memDC->m_selected.Ok()) return FALSE;
 585
 586         /* we use the "XCopyArea" way to copy a memory dc into
 587            y different window if the memory dc BOTH
 588            a) doesn't have any mask or its mask isn't used
 589            b) it is clipped
 590            c) is not 1-bit */
 591
 592         if (useMask && (memDC->m_selected.GetMask()))
 593         {
 594            /* we HAVE TO use the direct way for memory dcs
 595               that have mask since the XCopyArea doesn't know
 596               about masks */
 597             use_bitmap_method = TRUE;
 598         }
 599         else if (memDC->m_selected.GetDepth() == 1)
 600         {
 601            /* we HAVE TO use the direct way for memory dcs
 602               that are bitmaps because XCopyArea doesn't cope
 603               with different bit depths */
 604             use_bitmap_method = TRUE;
 605         }
 606         else if ((xsrc == 0) && (ysrc == 0) &&
 607                  (width == memDC->m_selected.GetWidth()) &&
 608                  (height == memDC->m_selected.GetHeight()))
 609         {
 610            /* we SHOULD use the direct way if all of the bitmap
 611               in the memory dc is copied in which case XCopyArea
 612               wouldn't be able able to boost performace by reducing
 613               the area to be scaled */
 614             use_bitmap_method = TRUE;
 615         }
 616         else
 617         {
 618             use_bitmap_method = FALSE;
 619         }
 620     }
 621
 622     CalcBoundingBox( xdest, ydest );
 623     CalcBoundingBox( xdest + width, ydest + height );
 624
 625     int old_logical_func = m_logicalFunction;
 626     SetLogicalFunction( logical_func );
 627
 628     if (use_bitmap_method)
 629     {
 630         /* scale/translate bitmap size */
 631
 632         wxCoord bm_width = memDC->m_selected.GetWidth();
 633         wxCoord bm_height = memDC->m_selected.GetHeight();
 634
 635         wxCoord bm_ww = XLOG2DEVREL( bm_width );
 636         wxCoord bm_hh = YLOG2DEVREL( bm_height );
 637
 638         /* scale bitmap if required */
 639
 640         wxBitmap use_bitmap;
 641
 642         if ((bm_width != bm_ww) || (bm_height != bm_hh))
 643         {
 644             wxImage image( memDC->m_selected );
 645             image = image.Scale( bm_ww, bm_hh );
 646
 647             use_bitmap = image.ConvertToBitmap();
 648         }
 649         else
 650         {
 651             use_bitmap = memDC->m_selected;
 652         }
 653
 654         /* scale/translate size and position */
 655
 656         wxCoord xx = XLOG2DEV(xdest);
 657         wxCoord yy = YLOG2DEV(ydest);
 658
 659         wxCoord ww = XLOG2DEVREL(width);
 660         wxCoord hh = YLOG2DEVREL(height);
 661
 662         /* apply mask if any */
 663
 664         GdkBitmap *mask = (GdkBitmap *) NULL;
 665         if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 666
 667         if (useMask && mask)
 668         {
 669             gdk_gc_set_clip_mask( m_penGC, mask );
 670             gdk_gc_set_clip_origin( m_penGC, xx, yy );
 671         }
 672
 673         /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 674
 675         GdkPixmap *pm = use_bitmap.GetPixmap();
 676         if (pm)
 677         {
 678             gdk_draw_pixmap( m_window, m_penGC, pm, xsrc, ysrc, xx, yy, ww, hh );
 679         }
 680         else
 681         {
 682             GdkBitmap *bm = use_bitmap.GetBitmap();
 683             if (bm)
 684             {
 685                 /* we use the textGC here because blitting a bitmap is done
 686                    using the current text colour */
 687                 gdk_draw_bitmap( m_window, m_textGC, bm, xsrc, ysrc, xx, yy, ww, hh );
 688             }
 689         }
 690
 691         /* remove mask again if any */
 692
 693         if (useMask && mask)
 694         {
 695             gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 696             gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 697         }
 698     }
 699     else /* use_bitmap_method */
 700     {
 701         /* scale/translate size and position */
 702
 703         wxCoord xx = XLOG2DEV(xdest);
 704         wxCoord yy = YLOG2DEV(ydest);
 705
 706         wxCoord ww = XLOG2DEVREL(width);
 707         wxCoord hh = YLOG2DEVREL(height);
 708
 709         if ((width != ww) || (height != hh))
 710         {
 711             /* draw source window into a bitmap as we cannot scale
 712                a window in contrast to a bitmap. this would actually
 713                work with memory dcs as well, but we'd lose the mask
 714                information and waste one step in this process since
 715                a memory already has a bitmap. all this is slightly
 716                inefficient as we could take an XImage directly from
 717                an X window, but we'd then also have to care that
 718                the window is not outside the screen (in which case
 719                we'd get a BadMatch or what not).
 720                Is a double XGetImage and combined XGetPixel and
 721                XPutPixel really faster? I'm not sure. look at wxXt
 722                for a different implementation of the same problem. */
 723
 724             wxBitmap bitmap( width, height );
 725             gdk_window_copy_area( bitmap.GetPixmap(), m_penGC, 0, 0,
 726                                   srcDC->GetWindow(),
 727                                   xsrc, ysrc, width, height );
 728
 729             /* scale image */
 730
 731             wxImage image( bitmap );
 732             image = image.Scale( ww, hh );
 733
 734             /* convert to bitmap */
 735
 736             bitmap = image.ConvertToBitmap();
 737
 738             /* draw scaled bitmap */
 739
 740             gdk_draw_pixmap( m_window, m_penGC, bitmap.GetPixmap(), 0, 0, xx, yy, -1, -1 );
 741
 742         }
 743         else
 744         {
 745             /* no scaling and not a memory dc with a mask either */
 746
 747             gdk_window_copy_area( m_window, m_penGC, xx, yy,
 748                                   srcDC->GetWindow(),
 749                                   xsrc, ysrc, width, height );
 750         }
 751     }
 752
 753     SetLogicalFunction( old_logical_func );
 754     return TRUE;
 755 }
 756
 757 void wxWindowDC::DoDrawText( const wxString &text, wxCoord x, wxCoord y )
 758 {
 759     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 760
 761     if (!m_window) return;
 762
 763     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 764
 765     wxCHECK_RET( font, wxT("invalid font") );
 766
 767     x = XLOG2DEV(x);
 768     y = YLOG2DEV(y);
 769
 770     /* CMB 21/5/98: draw text background if mode is wxSOLID */
 771     if (m_backgroundMode == wxSOLID)
 772     {
 773         wxCoord width = gdk_string_width( font, text.mbc_str() );
 774         wxCoord height = font->ascent + font->descent;
 775         gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 776         gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 777         gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 778     }
 779     gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text.mbc_str() );
 780
 781     /* CMB 17/7/98: simple underline: ignores scaling and underlying
 782        X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 783        properties (see wxXt implementation) */
 784     if (m_font.GetUnderlined())
 785     {
 786         wxCoord width = gdk_string_width( font, text.mbc_str() );
 787         wxCoord ul_y = y + font->ascent;
 788         if (font->descent > 0) ul_y++;
 789         gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 790     }
 791
 792     wxCoord w, h;
 793     GetTextExtent (text, &w, &h);
 794     CalcBoundingBox (x + w, y + h);
 795     CalcBoundingBox (x, y);
 796 }
 797
 798 void wxWindowDC::DoGetTextExtent(const wxString &string,
 799                                  wxCoord *width, wxCoord *height,
 800                                  wxCoord *descent, wxCoord *externalLeading,
 801                                  wxFont *theFont) const
 802 {
 803     wxFont fontToUse = m_font;
 804     if (theFont) fontToUse = *theFont;
 805
 806     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 807     if (width) (*width) = wxCoord(gdk_string_width( font, string.mbc_str() ) / m_scaleX);
 808     if (height) (*height) = wxCoord((font->ascent + font->descent) / m_scaleY);
 809     if (descent) (*descent) = wxCoord(font->descent / m_scaleY);
 810     if (externalLeading) (*externalLeading) = 0;  // ??
 811 }
 812
 813 wxCoord wxWindowDC::GetCharWidth() const
 814 {
 815     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 816     return wxCoord(gdk_string_width( font, "H" ) / m_scaleX);
 817 }
 818
 819 wxCoord wxWindowDC::GetCharHeight() const
 820 {
 821     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 822     return wxCoord((font->ascent + font->descent) / m_scaleY);
 823 }
 824
 825 void wxWindowDC::Clear()
 826 {
 827     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 828
 829     if (!m_window) return;
 830
 831     /* - we either are a memory dc or have a window as the
 832        owner. anything else shouldn't happen.
 833        - we don't use gdk_window_clear() as we don't set
 834        the window's background colour anymore. it is too
 835        much pain to keep the DC's and the window's back-
 836        ground colour in synch. */
 837
 838     if (m_owner)
 839     {
 840         int width,height;
 841         m_owner->GetSize( &width, &height );
 842         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 843         return;
 844     }
 845
 846     if (m_isMemDC)
 847     {
 848         int width,height;
 849         GetSize( &width, &height );
 850         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 851         return;
 852     }
 853 }
 854
 855 void wxWindowDC::SetFont( const wxFont &font )
 856 {
 857     m_font = font;
 858 }
 859
 860 void wxWindowDC::SetPen( const wxPen &pen )
 861 {
 862     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 863
 864     if (m_pen == pen) return;
 865
 866     m_pen = pen;
 867
 868     if (!m_pen.Ok()) return;
 869
 870     if (!m_window) return;
 871
 872     gint width = m_pen.GetWidth();
 873     if (width <= 0)
 874     {
 875         // CMB: if width is non-zero scale it with the dc
 876         width = 1;
 877     }
 878     else
 879     {
 880         // X doesn't allow different width in x and y and so we take
 881         // the average
 882         double w = 0.5 +
 883                    ( fabs((double) XLOG2DEVREL(width)) +
 884                      fabs((double) YLOG2DEVREL(width)) ) / 2.0;
 885         width = (int)w;
 886     }
 887
 888     static const char dotted[] = {1, 1};
 889     static const char short_dashed[] = {2, 2};
 890     static const char wxCoord_dashed[] = {2, 4};
 891     static const char dotted_dashed[] = {3, 3, 1, 3};
 892
 893     // We express dash pattern in pen width unit, so we are
 894     // independent of zoom factor and so on...
 895     int req_nb_dash;
 896     const char *req_dash;
 897
 898     GdkLineStyle lineStyle = GDK_LINE_SOLID;
 899     switch (m_pen.GetStyle())
 900     {
 901         case wxUSER_DASH:
 902         {
 903             lineStyle = GDK_LINE_ON_OFF_DASH;
 904             req_nb_dash = m_pen.GetDashCount();
 905             req_dash = m_pen.GetDash();
 906             break;
 907         }
 908         case wxDOT:
 909         {
 910             lineStyle = GDK_LINE_ON_OFF_DASH;
 911             req_nb_dash = 2;
 912             req_dash = dotted;
 913             break;
 914         }
 915         case wxLONG_DASH:
 916         {
 917             lineStyle = GDK_LINE_ON_OFF_DASH;
 918             req_nb_dash = 2;
 919             req_dash = wxCoord_dashed;
 920             break;
 921         }
 922         case wxSHORT_DASH:
 923         {
 924             lineStyle = GDK_LINE_ON_OFF_DASH;
 925             req_nb_dash = 2;
 926             req_dash = short_dashed;
 927             break;
 928         }
 929         case wxDOT_DASH:
 930         {
 931 //            lineStyle = GDK_LINE_DOUBLE_DASH;
 932             lineStyle = GDK_LINE_ON_OFF_DASH;
 933             req_nb_dash = 4;
 934             req_dash = dotted_dashed;
 935             break;
 936         }
 937
 938         case wxTRANSPARENT:
 939         case wxSTIPPLE:
 940         case wxSOLID:
 941         default:
 942         {
 943             lineStyle = GDK_LINE_SOLID;
 944             req_dash = (wxDash*)NULL;
 945             req_nb_dash = 0;
 946             break;
 947         }
 948     }
 949
 950 #if (GTK_MINOR_VERSION > 0)
 951     if (req_dash && req_nb_dash)
 952     {
 953         char *real_req_dash = new char[req_nb_dash];
 954         if (real_req_dash)
 955         {
 956             for (int i = 0; i < req_nb_dash; i++)
 957                 real_req_dash[i] = req_dash[i] * width;
 958             gdk_gc_set_dashes( m_penGC, 0, real_req_dash, req_nb_dash );
 959             delete[] real_req_dash;
 960         }
 961         else
 962         {
 963             // No Memory. We use non-scaled dash pattern...
 964             gdk_gc_set_dashes( m_penGC, 0, (char*)req_dash, req_nb_dash );
 965         }
 966     }
 967 #endif
 968
 969     GdkCapStyle capStyle = GDK_CAP_ROUND;
 970     switch (m_pen.GetCap())
 971     {
 972         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
 973         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
 974         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
 975     }
 976
 977     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
 978     switch (m_pen.GetJoin())
 979     {
 980         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
 981         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
 982         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
 983     }
 984
 985     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
 986
 987     m_pen.GetColour().CalcPixel( m_cmap );
 988     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
 989 }
 990
 991 void wxWindowDC::SetBrush( const wxBrush &brush )
 992 {
 993     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 994
 995     if (m_brush == brush) return;
 996
 997     m_brush = brush;
 998
 999     if (!m_brush.Ok()) return;
1000
1001     if (!m_window) return;
1002
1003     m_brush.GetColour().CalcPixel( m_cmap );
1004     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
1005
1006     gdk_gc_set_fill( m_brushGC, GDK_SOLID );
1007
1008     if ((m_brush.GetStyle() == wxSTIPPLE) && (m_brush.GetStipple()->Ok()))
1009     {
1010         if (m_brush.GetStipple()->GetPixmap())
1011         {
1012             gdk_gc_set_fill( m_brushGC, GDK_TILED );
1013             gdk_gc_set_tile( m_brushGC, m_brush.GetStipple()->GetPixmap() );
1014         }
1015         else
1016         {
1017             gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1018             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetBitmap() );
1019         }
1020     }
1021
1022     if (IS_HATCH(m_brush.GetStyle()))
1023     {
1024         gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1025         int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
1026         gdk_gc_set_stipple( m_brushGC, hatches[num] );
1027     }
1028 }
1029
1030 void wxWindowDC::SetBackground( const wxBrush &brush )
1031 {
1032    /* CMB 21/7/98: Added SetBackground. Sets background brush
1033     * for Clear() and bg colour for shapes filled with cross-hatch brush */
1034
1035     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1036
1037     if (m_backgroundBrush == brush) return;
1038
1039     m_backgroundBrush = brush;
1040
1041     if (!m_backgroundBrush.Ok()) return;
1042
1043     if (!m_window) return;
1044
1045     m_backgroundBrush.GetColour().CalcPixel( m_cmap );
1046     gdk_gc_set_background( m_brushGC, m_backgroundBrush.GetColour().GetColor() );
1047     gdk_gc_set_background( m_penGC, m_backgroundBrush.GetColour().GetColor() );
1048     gdk_gc_set_background( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1049     gdk_gc_set_foreground( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1050
1051     gdk_gc_set_fill( m_bgGC, GDK_SOLID );
1052
1053     if ((m_backgroundBrush.GetStyle() == wxSTIPPLE) && (m_backgroundBrush.GetStipple()->Ok()))
1054     {
1055         if (m_backgroundBrush.GetStipple()->GetPixmap())
1056         {
1057             gdk_gc_set_fill( m_bgGC, GDK_TILED );
1058             gdk_gc_set_tile( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
1059         }
1060         else
1061         {
1062             gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1063             gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetBitmap() );
1064         }
1065     }
1066
1067     if (IS_HATCH(m_backgroundBrush.GetStyle()))
1068     {
1069         gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1070         int num = m_backgroundBrush.GetStyle() - wxBDIAGONAL_HATCH;
1071         gdk_gc_set_stipple( m_bgGC, hatches[num] );
1072     }
1073 }
1074
1075 void wxWindowDC::SetLogicalFunction( int function )
1076 {
1077     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1078
1079     if (m_logicalFunction == function) return;
1080
1081     GdkFunction mode = GDK_COPY;
1082     switch (function)
1083     {
1084         case wxXOR:          mode = GDK_XOR;           break;
1085         case wxINVERT:       mode = GDK_INVERT;        break;
1086 #if (GTK_MINOR_VERSION > 0)
1087         case wxOR_REVERSE:   mode = GDK_OR_REVERSE;    break;
1088         case wxAND_REVERSE:  mode = GDK_AND_REVERSE;   break;
1089         case wxCLEAR:        mode = GDK_CLEAR;         break;
1090         case wxSET:          mode = GDK_SET;           break;
1091         case wxOR_INVERT:    mode = GDK_OR_INVERT;     break;
1092         case wxSRC_AND:
1093         case wxAND:          mode = GDK_AND;           break;
1094         case wxSRC_OR:
1095         case wxOR:           mode = GDK_OR;            break;
1096         case wxEQUIV:        mode = GDK_EQUIV;         break;
1097         case wxNAND:         mode = GDK_NAND;          break;
1098         case wxAND_INVERT:   mode = GDK_AND_INVERT;    break;
1099         case wxCOPY:         mode = GDK_COPY;          break;
1100         case wxNO_OP:        mode = GDK_NOOP;          break;
1101         case wxSRC_INVERT:   mode = GDK_COPY_INVERT;   break;
1102 #endif
1103         default:
1104         {
1105            wxFAIL_MSG( wxT("unsupported logical function") );
1106            break;
1107         }
1108     }
1109
1110     m_logicalFunction = function;
1111
1112     if (!m_window) return;
1113
1114     gdk_gc_set_function( m_penGC, mode );
1115     gdk_gc_set_function( m_brushGC, mode );
1116     gdk_gc_set_function( m_textGC, mode );
1117 }
1118
1119 void wxWindowDC::SetTextForeground( const wxColour &col )
1120 {
1121     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1122
1123     if (m_textForegroundColour == col) return;
1124
1125     m_textForegroundColour = col;
1126     if (!m_textForegroundColour.Ok()) return;
1127
1128     if (!m_window) return;
1129
1130     m_textForegroundColour.CalcPixel( m_cmap );
1131     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
1132 }
1133
1134 void wxWindowDC::SetTextBackground( const wxColour &col )
1135 {
1136     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1137
1138     if (m_textBackgroundColour == col) return;
1139
1140     m_textBackgroundColour = col;
1141     if (!m_textBackgroundColour.Ok()) return;
1142
1143     if (!m_window) return;
1144
1145     m_textBackgroundColour.CalcPixel( m_cmap );
1146     gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
1147 }
1148
1149 void wxWindowDC::SetBackgroundMode( int mode )
1150 {
1151     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1152
1153     m_backgroundMode = mode;
1154
1155     if (!m_window) return;
1156
1157     // CMB 21/7/98: fill style of cross-hatch brushes is affected by
1158     // transparent/solid background mode
1159
1160     if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
1161     {
1162         gdk_gc_set_fill( m_brushGC,
1163           (m_backgroundMode == wxTRANSPARENT) ? GDK_STIPPLED : GDK_OPAQUE_STIPPLED);
1164     }
1165 }
1166
1167 void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
1168 {
1169     wxFAIL_MSG( wxT("wxWindowDC::SetPalette not implemented") );
1170 }
1171
1172 void wxWindowDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
1173 {
1174     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1175
1176     wxDC::DoSetClippingRegion( x, y, width, height );
1177
1178     if (!m_window) return;
1179
1180     GdkRectangle rect;
1181     rect.x = XLOG2DEV(x);
1182     rect.y = YLOG2DEV(y);
1183     rect.width = XLOG2DEVREL(width);
1184     rect.height = YLOG2DEVREL(height);
1185     gdk_gc_set_clip_rectangle( m_penGC, &rect );
1186     gdk_gc_set_clip_rectangle( m_brushGC, &rect );
1187     gdk_gc_set_clip_rectangle( m_textGC, &rect );
1188     gdk_gc_set_clip_rectangle( m_bgGC, &rect );
1189 }
1190
1191 void wxWindowDC::DoSetClippingRegionAsRegion( const wxRegion &region  )
1192 {
1193     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1194
1195     if (region.Empty())
1196     {
1197         DestroyClippingRegion();
1198         return;
1199     }
1200
1201     if (!m_window) return;
1202
1203     gdk_gc_set_clip_region( m_penGC, region.GetRegion() );
1204     gdk_gc_set_clip_region( m_brushGC, region.GetRegion() );
1205     gdk_gc_set_clip_region( m_textGC, region.GetRegion() );
1206     gdk_gc_set_clip_region( m_bgGC, region.GetRegion() );
1207 }
1208
1209 void wxWindowDC::DestroyClippingRegion()
1210 {
1211     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1212
1213     wxDC::DestroyClippingRegion();
1214
1215     if (!m_window) return;
1216
1217     gdk_gc_set_clip_rectangle( m_penGC, (GdkRectangle *) NULL );
1218     gdk_gc_set_clip_rectangle( m_brushGC, (GdkRectangle *) NULL );
1219     gdk_gc_set_clip_rectangle( m_textGC, (GdkRectangle *) NULL );
1220     gdk_gc_set_clip_rectangle( m_bgGC, (GdkRectangle *) NULL );
1221 }
1222
1223 void wxWindowDC::SetUpDC()
1224 {
1225     Destroy();
1226     m_ok = TRUE;
1227     m_logicalFunction = wxCOPY;
1228     m_penGC = gdk_gc_new( m_window );
1229     m_brushGC = gdk_gc_new( m_window );
1230     m_textGC = gdk_gc_new( m_window );
1231     m_bgGC = gdk_gc_new( m_window );
1232
1233     wxColour tmp_col( m_textForegroundColour );
1234     m_textForegroundColour = wxNullColour;
1235     SetTextForeground( tmp_col );
1236     tmp_col = m_textBackgroundColour;
1237     m_textBackgroundColour = wxNullColour;
1238     SetTextBackground( tmp_col );
1239
1240     wxPen tmp_pen( m_pen );
1241     m_pen = wxNullPen;
1242     SetPen( tmp_pen );
1243
1244     wxFont tmp_font( m_font );
1245     m_font = wxNullFont;
1246     SetFont( tmp_font );
1247
1248     wxBrush tmp_brush( m_brush );
1249     m_brush = wxNullBrush;
1250     SetBrush( tmp_brush );
1251
1252 /*
1253     tmp_brush = m_backgroundBrush;
1254     m_backgroundBrush = wxNullBrush;
1255     SetBackground( tmp_brush );
1256 */
1257     tmp_brush = m_backgroundBrush;
1258     m_backgroundBrush = wxNullBrush;
1259     SetBackground( *wxWHITE_BRUSH );
1260     m_backgroundBrush = tmp_brush;
1261
1262     if (!hatch_bitmap)
1263     {
1264         hatch_bitmap    = hatches;
1265         hatch_bitmap[0] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, bdiag_bits, bdiag_width, bdiag_height );
1266         hatch_bitmap[1] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cdiag_bits, cdiag_width, cdiag_height );
1267         hatch_bitmap[2] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, fdiag_bits, fdiag_width, fdiag_height );
1268         hatch_bitmap[3] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cross_bits, cross_width, cross_height );
1269         hatch_bitmap[4] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, horiz_bits, horiz_width, horiz_height );
1270         hatch_bitmap[5] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, verti_bits, verti_width, verti_height );
1271     }
1272 }
1273
1274 void wxWindowDC::Destroy()
1275 {
1276     if (m_penGC) gdk_gc_unref( m_penGC );
1277     m_penGC = (GdkGC*) NULL;
1278     if (m_brushGC) gdk_gc_unref( m_brushGC );
1279     m_brushGC = (GdkGC*) NULL;
1280     if (m_textGC) gdk_gc_unref( m_textGC );
1281     m_textGC = (GdkGC*) NULL;
1282     if (m_bgGC) gdk_gc_unref( m_bgGC );
1283     m_bgGC = (GdkGC*) NULL;
1284 }
1285
1286 void wxWindowDC::ComputeScaleAndOrigin()
1287 {
1288     /* CMB: copy scale to see if it changes */
1289     double origScaleX = m_scaleX;
1290     double origScaleY = m_scaleY;
1291
1292     wxDC::ComputeScaleAndOrigin();
1293
1294     /* CMB: if scale has changed call SetPen to recalulate the line width */
1295     if ((m_scaleX != origScaleX || m_scaleY != origScaleY) &&
1296         (m_pen.Ok()))
1297     {
1298       /* this is a bit artificial, but we need to force wxDC to think
1299          the pen has changed */
1300       wxPen pen = m_pen;
1301       m_pen = wxNullPen;
1302       SetPen( pen );
1303   }
1304 }
1305
1306 // Resolution in pixels per logical inch
1307 wxSize wxWindowDC::GetPPI() const
1308 {
1309     return wxSize(100, 100);
1310 }
1311
1312 int wxWindowDC::GetDepth() const
1313 {
1314     wxFAIL_MSG(wxT("not implemented"));
1315
1316     return -1;
1317 }
1318
1319 #if wxUSE_SPLINES
1320 // ----------------------------------- spline code ----------------------------------------
1321
1322 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1323                          double a3, double b3, double a4, double b4);
1324 void wx_clear_stack();
1325 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1326         double *y3, double *x4, double *y4);
1327 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1328           double x4, double y4);
1329 static bool wx_spline_add_point(double x, double y);
1330 static void wx_spline_draw_point_array(wxDC *dc);
1331
1332 wxList wx_spline_point_list;
1333
1334 #define                half(z1, z2)        ((z1+z2)/2.0)
1335 #define                THRESHOLD        5
1336
1337 /* iterative version */
1338
1339 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1340                  double b4)
1341 {
1342     register double  xmid, ymid;
1343     double           x1, y1, x2, y2, x3, y3, x4, y4;
1344
1345     wx_clear_stack();
1346     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1347
1348     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1349         xmid = (double)half(x2, x3);
1350         ymid = (double)half(y2, y3);
1351         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1352             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1353             wx_spline_add_point( x1, y1 );
1354             wx_spline_add_point( xmid, ymid );
1355         } else {
1356             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1357                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1358             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1359                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1360         }
1361     }
1362 }
1363
1364 /* utilities used by spline drawing routines */
1365
1366 typedef struct wx_spline_stack_struct {
1367     double           x1, y1, x2, y2, x3, y3, x4, y4;
1368 } Stack;
1369
1370 #define         SPLINE_STACK_DEPTH             20
1371 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1372 static Stack   *wx_stack_top;
1373 static int      wx_stack_count;
1374
1375 void wx_clear_stack()
1376 {
1377     wx_stack_top = wx_spline_stack;
1378     wx_stack_count = 0;
1379 }
1380
1381 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1382 {
1383     wx_stack_top->x1 = x1;
1384     wx_stack_top->y1 = y1;
1385     wx_stack_top->x2 = x2;
1386     wx_stack_top->y2 = y2;
1387     wx_stack_top->x3 = x3;
1388     wx_stack_top->y3 = y3;
1389     wx_stack_top->x4 = x4;
1390     wx_stack_top->y4 = y4;
1391     wx_stack_top++;
1392     wx_stack_count++;
1393 }
1394
1395 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1396                   double *x3, double *y3, double *x4, double *y4)
1397 {
1398     if (wx_stack_count == 0)
1399         return (0);
1400     wx_stack_top--;
1401     wx_stack_count--;
1402     *x1 = wx_stack_top->x1;
1403     *y1 = wx_stack_top->y1;
1404     *x2 = wx_stack_top->x2;
1405     *y2 = wx_stack_top->y2;
1406     *x3 = wx_stack_top->x3;
1407     *y3 = wx_stack_top->y3;
1408     *x4 = wx_stack_top->x4;
1409     *y4 = wx_stack_top->y4;
1410     return (1);
1411 }
1412
1413 static bool wx_spline_add_point(double x, double y)
1414 {
1415   wxPoint *point = new wxPoint ;
1416   point->x = (int) x;
1417   point->y = (int) y;
1418   wx_spline_point_list.Append((wxObject*)point);
1419   return TRUE;
1420 }
1421
1422 static void wx_spline_draw_point_array(wxDC *dc)
1423 {
1424   dc->DrawLines(&wx_spline_point_list, 0, 0 );
1425   wxNode *node = wx_spline_point_list.First();
1426   while (node)
1427   {
1428     wxPoint *point = (wxPoint *)node->Data();
1429     delete point;
1430     delete node;
1431     node = wx_spline_point_list.First();
1432   }
1433 }
1434
1435 void wxWindowDC::DoDrawSpline( wxList *points )
1436 {
1437     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1438
1439     wxPoint *p;
1440     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1441     double           x1, y1, x2, y2;
1442
1443     wxNode *node = points->First();
1444     p = (wxPoint *)node->Data();
1445
1446     x1 = p->x;
1447     y1 = p->y;
1448
1449     node = node->Next();
1450     p = (wxPoint *)node->Data();
1451
1452     x2 = p->x;
1453     y2 = p->y;
1454     cx1 = (double)((x1 + x2) / 2);
1455     cy1 = (double)((y1 + y2) / 2);
1456     cx2 = (double)((cx1 + x2) / 2);
1457     cy2 = (double)((cy1 + y2) / 2);
1458
1459     wx_spline_add_point(x1, y1);
1460
1461     while ((node = node->Next()) != NULL)
1462     {
1463         p = (wxPoint *)node->Data();
1464         x1 = x2;
1465         y1 = y2;
1466         x2 = p->x;
1467         y2 = p->y;
1468         cx4 = (double)(x1 + x2) / 2;
1469         cy4 = (double)(y1 + y2) / 2;
1470         cx3 = (double)(x1 + cx4) / 2;
1471         cy3 = (double)(y1 + cy4) / 2;
1472
1473         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1474
1475         cx1 = cx4;
1476         cy1 = cy4;
1477         cx2 = (double)(cx1 + x2) / 2;
1478         cy2 = (double)(cy1 + y2) / 2;
1479     }
1480
1481     wx_spline_add_point( cx1, cy1 );
1482     wx_spline_add_point( x2, y2 );
1483
1484     wx_spline_draw_point_array( this );
1485 }
1486
1487 #endif // wxUSE_SPLINE
1488
1489 //-----------------------------------------------------------------------------
1490 // wxPaintDC
1491 //-----------------------------------------------------------------------------
1492
1493 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC,wxWindowDC)
1494
1495 wxPaintDC::wxPaintDC()
1496   : wxWindowDC()
1497 {
1498 }
1499
1500 wxPaintDC::wxPaintDC( wxWindow *win )
1501   : wxWindowDC( win )
1502 {
1503 }
1504
1505 //-----------------------------------------------------------------------------
1506 // wxClientDC
1507 //-----------------------------------------------------------------------------
1508
1509 IMPLEMENT_DYNAMIC_CLASS(wxClientDC,wxWindowDC)
1510
1511 wxClientDC::wxClientDC()
1512   : wxWindowDC()
1513 {
1514 }
1515
1516 wxClientDC::wxClientDC( wxWindow *win )
1517   : wxWindowDC( win )
1518 {
1519 }
1520