src/gtk/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcclient.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Markus Holzem, Chris Breeze
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "dcclient.h"
  12 #endif
  13
  14 #include "wx/dcclient.h"
  15 #include "wx/dcmemory.h"
  16 #include "wx/image.h"
  17 #include <math.h>
  18
  19 #include "gdk/gdk.h"
  20 #include "gtk/gtk.h"
  21
  22 //-----------------------------------------------------------------------------
  23 // local data
  24 //-----------------------------------------------------------------------------
  25
  26 #include "bdiag.xbm"
  27 #include "fdiag.xbm"
  28 #include "cdiag.xbm"
  29 #include "horiz.xbm"
  30 #include "verti.xbm"
  31 #include "cross.xbm"
  32 #define  num_hatches 6
  33
  34 static GdkPixmap  *hatches[num_hatches];
  35 static GdkPixmap **hatch_bitmap = (GdkPixmap **) NULL;
  36
  37 //-----------------------------------------------------------------------------
  38 // constants
  39 //-----------------------------------------------------------------------------
  40
  41 #define RAD2DEG 57.2957795131
  42
  43 //-----------------------------------------------------------------------------
  44 // temporary implementation of the missing GDK function
  45 //-----------------------------------------------------------------------------
  46 #include "gdk/gdkprivate.h"
  47 void gdk_draw_bitmap     (GdkDrawable  *drawable,
  48                           GdkGC        *gc,
  49                           GdkDrawable  *src,
  50                           gint          xsrc,
  51                           gint          ysrc,
  52                           gint          xdest,
  53                           gint          ydest,
  54                           gint          width,
  55                           gint          height)
  56 {
  57     GdkWindowPrivate *drawable_private;
  58     GdkWindowPrivate *src_private;
  59     GdkGCPrivate *gc_private;
  60
  61     g_return_if_fail (drawable != NULL);
  62     g_return_if_fail (src != NULL);
  63     g_return_if_fail (gc != NULL);
  64
  65     drawable_private = (GdkWindowPrivate*) drawable;
  66     src_private = (GdkWindowPrivate*) src;
  67     if (drawable_private->destroyed || src_private->destroyed)
  68         return;
  69
  70     gc_private = (GdkGCPrivate*) gc;
  71
  72     if (width == -1) width = src_private->width;
  73     if (height == -1) height = src_private->height;
  74
  75     XCopyPlane( drawable_private->xdisplay,
  76                 src_private->xwindow,
  77                 drawable_private->xwindow,
  78                 gc_private->xgc,
  79                 xsrc, ysrc,
  80                 width, height,
  81                 xdest, ydest,
  82                 1 );
  83 }
  84
  85 //-----------------------------------------------------------------------------
  86 // wxWindowDC
  87 //-----------------------------------------------------------------------------
  88
  89 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC,wxDC)
  90
  91 wxWindowDC::wxWindowDC()
  92 {
  93     m_penGC = (GdkGC *) NULL;
  94     m_brushGC = (GdkGC *) NULL;
  95     m_textGC = (GdkGC *) NULL;
  96     m_bgGC = (GdkGC *) NULL;
  97     m_cmap = (GdkColormap *) NULL;
  98     m_isMemDC = FALSE;
  99     m_owner = (wxWindow *)NULL;
 100 }
 101
 102 wxWindowDC::wxWindowDC( wxWindow *window )
 103 {
 104     m_penGC = (GdkGC *) NULL;
 105     m_brushGC = (GdkGC *) NULL;
 106     m_textGC = (GdkGC *) NULL;
 107     m_bgGC = (GdkGC *) NULL;
 108     m_cmap = (GdkColormap *) NULL;
 109     m_owner = (wxWindow *)NULL;
 110
 111     if (!window) return;
 112     GtkWidget *widget = window->m_wxwindow;
 113     if (!widget) return;
 114     m_window = widget->window;
 115     if (!m_window) return;
 116     if (window->m_wxwindow)
 117         m_cmap = gtk_widget_get_colormap( window->m_wxwindow );
 118     else
 119         m_cmap = gtk_widget_get_colormap( window->m_widget );
 120
 121     m_isMemDC = FALSE;
 122
 123     SetUpDC();
 124
 125     /* this must be done after SetUpDC, bacause SetUpDC calls the
 126        repective SetBrush, SetPen, SetBackground etc functions
 127        to set up the DC. SetBackground call m_owner->SetBackground
 128        and this might not be desired as the standard dc background
 129        is white whereas a window might assume gray to be the
 130        standard (as e.g. wxStatusBar) */
 131
 132     m_owner = window;
 133 }
 134
 135 wxWindowDC::~wxWindowDC()
 136 {
 137     Destroy();
 138 }
 139
 140 void wxWindowDC::FloodFill( long WXUNUSED(x), long WXUNUSED(y),
 141                            const wxColour &WXUNUSED(col), int WXUNUSED(style) )
 142 {
 143     wxFAIL_MSG( _T("wxWindowDC::FloodFill not implemented") );
 144 }
 145
 146 bool wxWindowDC::GetPixel( long WXUNUSED(x1), long WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
 147 {
 148     wxFAIL_MSG( _T("wxWindowDC::GetPixel not implemented") );
 149     return FALSE;
 150 }
 151
 152 void wxWindowDC::DrawLine( long x1, long y1, long x2, long y2 )
 153 {
 154     wxCHECK_RET( Ok(), _T("invalid window dc") );
 155
 156     if (m_pen.GetStyle() != wxTRANSPARENT)
 157     {
 158         gdk_draw_line( m_window, m_penGC,
 159                        XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2) );
 160
 161         CalcBoundingBox(x1, y1);
 162         CalcBoundingBox(x2, y2);
 163     }
 164 }
 165
 166 void wxWindowDC::CrossHair( long x, long y )
 167 {
 168     wxCHECK_RET( Ok(), _T("invalid window dc") );
 169
 170     if (m_pen.GetStyle() != wxTRANSPARENT)
 171     {
 172         int w = 0;
 173         int h = 0;
 174         GetSize( &w, &h );
 175         long xx = XLOG2DEV(x);
 176         long yy = YLOG2DEV(y);
 177         gdk_draw_line( m_window, m_penGC, 0, yy, XLOG2DEVREL(w), yy );
 178         gdk_draw_line( m_window, m_penGC, xx, 0, xx, YLOG2DEVREL(h) );
 179     }
 180 }
 181
 182 void wxWindowDC::DrawArc( long x1, long y1, long x2, long y2, double xc, double yc )
 183 {
 184     wxCHECK_RET( Ok(), _T("invalid window dc") );
 185
 186     long xx1 = XLOG2DEV(x1);
 187     long yy1 = YLOG2DEV(y1);
 188     long xx2 = XLOG2DEV(x2);
 189     long yy2 = YLOG2DEV(y2);
 190     long xxc = XLOG2DEV((long)xc);
 191     long yyc = YLOG2DEV((long)yc);
 192     double dx = xx1 - xxc;
 193     double dy = yy1 - yyc;
 194     double radius = sqrt(dx*dx+dy*dy);
 195     long   r      = (long)radius;
 196     double radius1, radius2;
 197
 198     if (xx1 == xx2 && yy1 == yy2)
 199     {
 200         radius1 = 0.0;
 201         radius2 = 360.0;
 202     }
 203     else
 204     if (radius == 0.0)
 205     {
 206         radius1 = radius2 = 0.0;
 207     }
 208     else
 209     {
 210         radius1 = (xx1 - xxc == 0) ?
 211             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 212             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 213         radius2 = (xx2 - xxc == 0) ?
 214             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 215             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 216     }
 217     long alpha1 = long(radius1 * 64.0);
 218     long alpha2 = long((radius2 - radius1) * 64.0);
 219     while (alpha2 <= 0) alpha2 += 360*64;
 220     while (alpha1 > 360*64) alpha1 -= 360*64;
 221
 222     if (m_brush.GetStyle() != wxTRANSPARENT)
 223         gdk_draw_arc( m_window, m_brushGC, TRUE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 224
 225     if (m_pen.GetStyle() != wxTRANSPARENT)
 226         gdk_draw_arc( m_window, m_penGC, FALSE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 227
 228     CalcBoundingBox (x1, y1);
 229     CalcBoundingBox (x2, y2);
 230 }
 231
 232 void wxWindowDC::DrawEllipticArc( long x, long y, long width, long height, double sa, double ea )
 233 {
 234     wxCHECK_RET( Ok(), _T("invalid window dc") );
 235
 236     long xx = XLOG2DEV(x);
 237     long yy = YLOG2DEV(y);
 238     long ww = m_signX * XLOG2DEVREL(width);
 239     long hh = m_signY * YLOG2DEVREL(height);
 240
 241     // CMB: handle -ve width and/or height
 242     if (ww < 0) { ww = -ww; xx = xx - ww; }
 243     if (hh < 0) { hh = -hh; yy = yy - hh; }
 244
 245     long start = long(sa * 64.0);
 246     long end = long(ea * 64.0);
 247     if (m_brush.GetStyle() != wxTRANSPARENT)
 248         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, start, end );
 249
 250     if (m_pen.GetStyle() != wxTRANSPARENT)
 251         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, start, end );
 252
 253     CalcBoundingBox (x, y);
 254     CalcBoundingBox (x + width, y + height);
 255 }
 256
 257 void wxWindowDC::DrawPoint( long x, long y )
 258 {
 259     wxCHECK_RET( Ok(), _T("invalid window dc") );
 260
 261     if (m_pen.GetStyle() != wxTRANSPARENT)
 262         gdk_draw_point( m_window, m_penGC, XLOG2DEV(x), YLOG2DEV(y) );
 263
 264     CalcBoundingBox (x, y);
 265 }
 266
 267 void wxWindowDC::DrawLines( int n, wxPoint points[], long xoffset, long yoffset )
 268 {
 269     wxCHECK_RET( Ok(), _T("invalid window dc") );
 270
 271     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 272     if (n <= 0) return;
 273
 274     CalcBoundingBox( points[0].x + xoffset, points[0].y + yoffset );
 275
 276     for (int i = 0; i < n-1; i++)
 277     {
 278         long x1 = XLOG2DEV(points[i].x + xoffset);
 279         long x2 = XLOG2DEV(points[i+1].x + xoffset);
 280         long y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 281         long y2 = YLOG2DEV(points[i+1].y + yoffset);
 282         gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 283
 284         CalcBoundingBox( points[i+1].x + xoffset, points[i+1].y + yoffset );
 285     }
 286 }
 287
 288 void wxWindowDC::DrawLines( wxList *points, long xoffset, long yoffset )
 289 {
 290     wxCHECK_RET( Ok(), _T("invalid window dc") );
 291
 292     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 293
 294     wxNode *node = points->First();
 295     if (!node) return;
 296
 297     wxPoint *pt = (wxPoint*)node->Data();
 298     CalcBoundingBox( pt->x + xoffset, pt->y + yoffset );
 299
 300     while (node->Next())
 301     {
 302         wxPoint *point = (wxPoint*)node->Data();
 303         wxPoint *npoint = (wxPoint*)node->Next()->Data();
 304         long x1 = XLOG2DEV(point->x + xoffset);
 305         long x2 = XLOG2DEV(npoint->x + xoffset);
 306         long y1 = YLOG2DEV(point->y + yoffset);    // and a waste again...
 307         long y2 = YLOG2DEV(npoint->y + yoffset);
 308         gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 309         node = node->Next();
 310
 311         CalcBoundingBox( npoint->x + xoffset, npoint->y + yoffset );
 312     }
 313 }
 314
 315 void wxWindowDC::DrawPolygon( int n, wxPoint points[], long xoffset, long yoffset, int WXUNUSED(fillStyle) )
 316 {
 317     wxCHECK_RET( Ok(), _T("invalid window dc") );
 318
 319     if (n <= 0) return;
 320
 321     GdkPoint *gdkpoints = new GdkPoint[n+1];
 322     int i;
 323     for (i = 0 ; i < n ; i++)
 324     {
 325         gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
 326         gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
 327
 328         CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset );
 329     }
 330
 331     if (m_brush.GetStyle() != wxTRANSPARENT)
 332         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 333
 334     // To do: Fillstyle
 335
 336     if (m_pen.GetStyle() != wxTRANSPARENT)
 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     delete[] gdkpoints;
 347 }
 348
 349 void wxWindowDC::DrawPolygon( wxList *lines, long xoffset, long yoffset, int WXUNUSED(fillStyle))
 350 {
 351     wxCHECK_RET( Ok(), _T("invalid window dc") );
 352
 353     int n = lines->Number();
 354     if (n <= 0) return;
 355
 356     GdkPoint *gdkpoints = new GdkPoint[n];
 357     wxNode *node = lines->First();
 358     int cnt = 0;
 359     while (node)
 360     {
 361         wxPoint *p = (wxPoint *) node->Data();
 362         gdkpoints[cnt].x = XLOG2DEV(p->x + xoffset);
 363         gdkpoints[cnt].y = YLOG2DEV(p->y + yoffset);
 364         node = node->Next();
 365         cnt++;
 366
 367         CalcBoundingBox( p->x + xoffset, p->y + yoffset );
 368     }
 369
 370     if (m_brush.GetStyle() != wxTRANSPARENT)
 371         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 372
 373     // To do: Fillstyle
 374
 375     if (m_pen.GetStyle() != wxTRANSPARENT)
 376     {
 377         int i;
 378         for (i = 0 ; i < n ; i++)
 379         {
 380             gdk_draw_line( m_window, m_penGC,
 381                            gdkpoints[i%n].x,
 382                            gdkpoints[i%n].y,
 383                            gdkpoints[(i+1)%n].x,
 384                            gdkpoints[(i+1)%n].y );
 385         }
 386     }
 387     delete[] gdkpoints;
 388 }
 389
 390 void wxWindowDC::DrawRectangle( long x, long y, long width, long height )
 391 {
 392     wxCHECK_RET( Ok(), _T("invalid window dc") );
 393
 394     long xx = XLOG2DEV(x);
 395     long yy = YLOG2DEV(y);
 396     long ww = m_signX * XLOG2DEVREL(width);
 397     long hh = m_signY * YLOG2DEVREL(height);
 398
 399     // CMB: draw nothing if transformed w or h is 0
 400     if (ww == 0 || hh == 0) return;
 401
 402     // CMB: handle -ve width and/or height
 403     if (ww < 0) { ww = -ww; xx = xx - ww; }
 404     if (hh < 0) { hh = -hh; yy = yy - hh; }
 405
 406     if (m_brush.GetStyle() != wxTRANSPARENT)
 407       gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 408
 409     if (m_pen.GetStyle() != wxTRANSPARENT)
 410       gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 411
 412     CalcBoundingBox( x, y );
 413     CalcBoundingBox( x + width, y + height );
 414 }
 415
 416 void wxWindowDC::DrawRoundedRectangle( long x, long y, long width, long height, double radius )
 417 {
 418     wxCHECK_RET( Ok(), _T("invalid window dc") );
 419
 420     if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 421
 422     long xx = XLOG2DEV(x);
 423     long yy = YLOG2DEV(y);
 424     long ww = m_signX * XLOG2DEVREL(width);
 425     long hh = m_signY * YLOG2DEVREL(height);
 426     long rr = XLOG2DEVREL((long)radius);
 427
 428     // CMB: handle -ve width and/or height
 429     if (ww < 0) { ww = -ww; xx = xx - ww; }
 430     if (hh < 0) { hh = -hh; yy = yy - hh; }
 431
 432     // CMB: if radius is zero use DrawRectangle() instead to avoid
 433     // X drawing errors with small radii
 434     if (rr == 0)
 435     {
 436         DrawRectangle( x, y, width, height );
 437         return;
 438     }
 439
 440     // CMB: draw nothing if transformed w or h is 0
 441     if (ww == 0 || hh == 0) return;
 442
 443     // CMB: adjust size if outline is drawn otherwise the result is
 444     // 1 pixel too wide and high
 445     if (m_pen.GetStyle() != wxTRANSPARENT)
 446     {
 447         ww--;
 448         hh--;
 449     }
 450
 451     // CMB: ensure dd is not larger than rectangle otherwise we
 452     // get an hour glass shape
 453     long dd = 2 * rr;
 454     if (dd > ww) dd = ww;
 455     if (dd > hh) dd = hh;
 456     rr = dd / 2;
 457
 458     if (m_brush.GetStyle() != wxTRANSPARENT)
 459     {
 460         gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 461         gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 462         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 463         gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 464         gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 465         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 466     }
 467
 468     if (m_pen.GetStyle() != wxTRANSPARENT)
 469     {
 470         gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 471         gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 472         gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 473         gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 474         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 475         gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 476         gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 477         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 478     }
 479
 480     // this ignores the radius
 481     CalcBoundingBox( x, y );
 482     CalcBoundingBox( x + width, y + height );
 483 }
 484
 485 void wxWindowDC::DrawEllipse( long x, long y, long width, long height )
 486 {
 487     wxCHECK_RET( Ok(), _T("invalid window dc") );
 488
 489     long xx = XLOG2DEV(x);
 490     long yy = YLOG2DEV(y);
 491     long ww = m_signX * XLOG2DEVREL(width);
 492     long hh = m_signY * YLOG2DEVREL(height);
 493
 494     // CMB: handle -ve width and/or height
 495     if (ww < 0) { ww = -ww; xx = xx - ww; }
 496     if (hh < 0) { hh = -hh; yy = yy - hh; }
 497
 498     if (m_brush.GetStyle() != wxTRANSPARENT)
 499         gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 500
 501     if (m_pen.GetStyle() != wxTRANSPARENT)
 502         gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 503
 504     CalcBoundingBox( x - width, y - height );
 505     CalcBoundingBox( x + width, y + height );
 506 }
 507
 508 bool wxWindowDC::CanDrawBitmap() const
 509 {
 510     return TRUE;
 511 }
 512
 513 void wxWindowDC::DrawIcon( const wxIcon &icon, long x, long y )
 514 {
 515     DrawBitmap( icon, x, y, TRUE );
 516 }
 517
 518 void wxWindowDC::DrawBitmap( const wxBitmap &bitmap, long x, long y, bool useMask )
 519 {
 520     wxCHECK_RET( Ok(), _T("invalid window dc") );
 521
 522     if (!bitmap.Ok()) return;
 523
 524     /* scale/translate size and position */
 525
 526     int xx = XLOG2DEV(x);
 527     int yy = YLOG2DEV(y);
 528
 529     int w = bitmap.GetWidth();
 530     int h = bitmap.GetHeight();
 531
 532     int ww = XLOG2DEVREL(w);
 533     int hh = YLOG2DEVREL(h);
 534
 535     /* scale bitmap if required */
 536
 537     wxBitmap use_bitmap;
 538
 539     if ((w != ww) || (h != hh))
 540     {
 541         wxImage image( bitmap );
 542         image = image.Scale( ww, hh );
 543
 544         use_bitmap = image.ConvertToBitmap();
 545     }
 546     else
 547     {
 548         use_bitmap = bitmap;
 549     }
 550
 551     /* apply mask if any */
 552
 553     GdkBitmap *mask = (GdkBitmap *) NULL;
 554     if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 555
 556     if (useMask && mask)
 557     {
 558         gdk_gc_set_clip_mask( m_penGC, mask );
 559         gdk_gc_set_clip_origin( m_penGC, xx, yy );
 560     }
 561
 562     /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 563
 564     GdkPixmap *pm = use_bitmap.GetPixmap();
 565     if (pm)
 566     {
 567         gdk_draw_pixmap( m_window, m_penGC, pm, 0, 0, xx, yy, -1, -1 );
 568     }
 569     else
 570     {
 571         GdkBitmap *bm = use_bitmap.GetBitmap();
 572         if (bm)
 573         {
 574             gdk_draw_bitmap( m_window, m_penGC, bm, 0, 0, xx, yy, -1, -1 );
 575         }
 576     }
 577
 578     /* remove mask again if any */
 579
 580     if (useMask && mask)
 581     {
 582         gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 583         gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 584     }
 585
 586     CalcBoundingBox( x, y );
 587     CalcBoundingBox( x + w, y + h );
 588 }
 589
 590 bool wxWindowDC::Blit( long xdest, long ydest, long width, long height,
 591        wxDC *source, long xsrc, long ysrc, int logical_func, bool useMask )
 592 {
 593    /* this is the nth try to get this utterly useless function to
 594       work. it now completely ignores the scaling or translation
 595       of the source dc, but scales correctly on the target dc and
 596       knows about possible mask information in a memory dc. */
 597
 598     wxCHECK_MSG( Ok(), FALSE, _T("invalid window dc") );
 599
 600     wxCHECK_MSG( source, FALSE, _T("invalid source dc") );
 601
 602     wxClientDC *srcDC = (wxClientDC*)source;
 603     wxMemoryDC *memDC = (wxMemoryDC*)source;
 604
 605     bool use_bitmap_method = FALSE;
 606
 607     if (srcDC->m_isMemDC)
 608     {
 609         if (!memDC->m_selected.Ok()) return FALSE;
 610
 611         /* we use the "XCopyArea" way to copy a memory dc into
 612            y different window if the memory dc BOTH
 613            a) doesn't have any mask or its mask isn't used
 614            b) it is clipped
 615            c) is not 1-bit */
 616
 617         if (useMask && (memDC->m_selected.GetMask()))
 618         {
 619            /* we HAVE TO use the direct way for memory dcs
 620               that have mask since the XCopyArea doesn't know
 621               about masks and */
 622             use_bitmap_method = TRUE;
 623         }
 624         else if (memDC->m_selected.GetDepth() == 1)
 625         {
 626            /* we HAVE TO use the direct way for memory dcs
 627               that are bitmaps because XCopyArea doesn't copy
 628               with different bit depths */
 629             use_bitmap_method = TRUE;
 630         }
 631         else if ((xsrc == 0) && (ysrc == 0) &&
 632                  (width == memDC->m_selected.GetWidth()) &&
 633                  (height == memDC->m_selected.GetHeight()))
 634         {
 635            /* we SHOULD use the direct way if all of the bitmap
 636               in the memory dc is copied in which case XCopyArea
 637               wouldn't be able able to boost performace by reducing
 638               the area to be scaled */
 639             use_bitmap_method = TRUE;
 640         }
 641         else
 642         {
 643             use_bitmap_method = FALSE;
 644         }
 645     }
 646
 647     CalcBoundingBox( xdest, ydest );
 648     CalcBoundingBox( xdest + width, ydest + height );
 649
 650     int old_logical_func = m_logicalFunction;
 651     SetLogicalFunction( logical_func );
 652
 653     if (use_bitmap_method)
 654     {
 655         /* scale/translate bitmap size */
 656
 657         long bm_width = memDC->m_selected.GetWidth();
 658         long bm_height = memDC->m_selected.GetHeight();
 659
 660         long bm_ww = XLOG2DEVREL( bm_width );
 661         long bm_hh = YLOG2DEVREL( bm_height );
 662
 663         /* scale bitmap if required */
 664
 665         wxBitmap use_bitmap;
 666
 667         if ((bm_width != bm_ww) || (bm_height != bm_hh))
 668         {
 669             wxImage image( memDC->m_selected );
 670             image = image.Scale( bm_ww, bm_hh );
 671
 672             use_bitmap = image.ConvertToBitmap();
 673         }
 674         else
 675         {
 676             use_bitmap = memDC->m_selected;
 677         }
 678
 679         /* scale/translate size and position */
 680
 681         long xx = XLOG2DEV(xdest);
 682         long yy = YLOG2DEV(ydest);
 683
 684         long ww = XLOG2DEVREL(width);
 685         long hh = YLOG2DEVREL(height);
 686
 687         /* apply mask if any */
 688
 689         GdkBitmap *mask = (GdkBitmap *) NULL;
 690         if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 691
 692         if (useMask && mask)
 693         {
 694             gdk_gc_set_clip_mask( m_penGC, mask );
 695             gdk_gc_set_clip_origin( m_penGC, xx, yy );
 696         }
 697
 698         /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 699
 700         GdkPixmap *pm = use_bitmap.GetPixmap();
 701         if (pm)
 702         {
 703             gdk_draw_pixmap( m_window, m_penGC, pm, xsrc, ysrc, xx, yy, ww, hh );
 704         }
 705         else
 706         {
 707             GdkBitmap *bm = use_bitmap.GetBitmap();
 708             if (bm)
 709             {
 710                 /* we use the textGC here because blitting a bitmap is done
 711                    using the current text colour */
 712                 gdk_draw_bitmap( m_window, m_textGC, bm, xsrc, ysrc, xx, yy, ww, hh );
 713             }
 714         }
 715
 716         /* remove mask again if any */
 717
 718         if (useMask && mask)
 719         {
 720             gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 721             gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 722         }
 723     }
 724     else /* use_bitmap_method */
 725     {
 726         /* scale/translate size and position */
 727
 728         long xx = XLOG2DEV(xdest);
 729         long yy = YLOG2DEV(ydest);
 730
 731         long ww = XLOG2DEVREL(width);
 732         long hh = YLOG2DEVREL(height);
 733
 734         if ((width != ww) || (height != hh))
 735         {
 736             /* draw source window into a bitmap as we cannot scale
 737                a window in contrast to a bitmap. this would actually
 738                work with memory dcs as well, but we'd lose the mask
 739                information and waste one step in this process since
 740                a memory already has a bitmap. all this is slightly
 741                inefficient as we could take an XImage directly from
 742                an X window, but we'd then also have to care that
 743                the window is not outside the screen (in which case
 744                we'd get a BadMatch or what not).
 745                Is a double XGetImage and combined XGetPixel and
 746                XPutPixel really faster? I'm not sure. look at wxXt
 747                for a different implementation of the same problem. */
 748
 749             wxBitmap bitmap( width, height );
 750             gdk_window_copy_area( bitmap.GetPixmap(), m_penGC, 0, 0,
 751                                   srcDC->GetWindow(),
 752                                   xsrc, ysrc, width, height );
 753
 754             /* scale image */
 755
 756             wxImage image( bitmap );
 757             image = image.Scale( ww, hh );
 758
 759             /* convert to bitmap */
 760
 761             bitmap = image.ConvertToBitmap();
 762
 763             /* draw scaled bitmap */
 764
 765             gdk_draw_pixmap( m_window, m_penGC, bitmap.GetPixmap(), 0, 0, xx, yy, -1, -1 );
 766
 767         }
 768         else
 769         {
 770             /* no scaling and not a memory dc with a mask either */
 771
 772             gdk_window_copy_area( m_window, m_penGC, xx, yy,
 773                                   srcDC->GetWindow(),
 774                                   xsrc, ysrc, width, height );
 775         }
 776     }
 777
 778     SetLogicalFunction( old_logical_func );
 779     return TRUE;
 780 }
 781
 782 void wxWindowDC::DrawText( const wxString &text, long x, long y, bool WXUNUSED(use16) )
 783 {
 784     wxCHECK_RET( Ok(), _T("invalid window dc") );
 785
 786     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 787
 788     x = XLOG2DEV(x);
 789     y = YLOG2DEV(y);
 790
 791     /* CMB 21/5/98: draw text background if mode is wxSOLID */
 792     if (m_backgroundMode == wxSOLID)
 793     {
 794         long width = gdk_string_width( font, text.mbc_str() );
 795         long height = font->ascent + font->descent;
 796         gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 797         gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 798         gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 799     }
 800     gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text.mbc_str() );
 801
 802     /* CMB 17/7/98: simple underline: ignores scaling and underlying
 803        X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 804        properties (see wxXt implementation) */
 805     if (m_font.GetUnderlined())
 806     {
 807         long width = gdk_string_width( font, text.mbc_str() );
 808         long ul_y = y + font->ascent;
 809         if (font->descent > 0) ul_y++;
 810         gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 811     }
 812
 813     long w, h;
 814     GetTextExtent (text, &w, &h);
 815     CalcBoundingBox (x + w, y + h);
 816     CalcBoundingBox (x, y);
 817 }
 818
 819 bool wxWindowDC::CanGetTextExtent() const
 820 {
 821     return TRUE;
 822 }
 823
 824 void wxWindowDC::GetTextExtent( const wxString &string, long *width, long *height,
 825                      long *descent, long *externalLeading,
 826                      wxFont *theFont, bool WXUNUSED(use16) )
 827 {
 828     wxCHECK_RET( Ok(), _T("invalid window dc") );
 829
 830     wxFont fontToUse = m_font;
 831     if (theFont) fontToUse = *theFont;
 832
 833     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 834     if (width) (*width) = long(gdk_string_width( font, string.mbc_str() ) / m_scaleX);
 835     if (height) (*height) = long((font->ascent + font->descent) / m_scaleY);
 836     if (descent) (*descent) = long(font->descent / m_scaleY);
 837     if (externalLeading) (*externalLeading) = 0;  // ??
 838 }
 839
 840 long wxWindowDC::GetCharWidth()
 841 {
 842     wxCHECK_MSG( Ok(), 0, _T("invalid window dc") );
 843
 844     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 845     return long(gdk_string_width( font, "H" ) / m_scaleX);
 846 }
 847
 848 long wxWindowDC::GetCharHeight()
 849 {
 850     wxCHECK_MSG( Ok(), 0, _T("invalid window dc") );
 851
 852     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 853     return long((font->ascent + font->descent) / m_scaleY);
 854 }
 855
 856 void wxWindowDC::Clear()
 857 {
 858     wxCHECK_RET( Ok(), _T("invalid window dc") );
 859
 860     /* - we either are a memory dc or have a window as the
 861        owner. anything else shouldn't happen.
 862        - we don't use gdk_window_clear() as we don't set
 863        the window's background colour anymore. it is too
 864        much pain to keep the DC's and the window's back-
 865        ground colour in synch. */
 866
 867     if (m_owner)
 868     {
 869         int width,height;
 870         m_owner->GetSize( &width, &height );
 871         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 872         return;
 873     }
 874
 875     if (m_isMemDC)
 876     {
 877         int width,height;
 878         GetSize( &width, &height );
 879         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 880         return;
 881     }
 882 }
 883
 884 void wxWindowDC::SetFont( const wxFont &font )
 885 {
 886     wxCHECK_RET( Ok(), _T("invalid window dc") );
 887
 888     m_font = font;
 889 }
 890
 891 void wxWindowDC::SetPen( const wxPen &pen )
 892 {
 893     wxCHECK_RET( Ok(), _T("invalid window dc") );
 894
 895     if (m_pen == pen) return;
 896
 897     m_pen = pen;
 898
 899     if (!m_pen.Ok()) return;
 900
 901     gint width = m_pen.GetWidth();
 902     // CMB: if width is non-zero scale it with the dc
 903     if (width <= 0)
 904     {
 905         width = 1;
 906     }
 907     else
 908     {
 909         // X doesn't allow different width in x and y and so we take
 910         // the average
 911         double w = 0.5 + (abs(XLOG2DEVREL(width)) + abs(YLOG2DEVREL(width))) / 2.0;
 912         width = (int)w;
 913     }
 914
 915     GdkLineStyle lineStyle = GDK_LINE_SOLID;
 916     switch (m_pen.GetStyle())
 917     {
 918         case wxSOLID:      { lineStyle = GDK_LINE_SOLID;       break; }
 919         case wxDOT:        { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 920         case wxLONG_DASH:  { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 921         case wxSHORT_DASH: { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 922         case wxDOT_DASH:   { lineStyle = GDK_LINE_DOUBLE_DASH; break; }
 923     }
 924
 925     GdkCapStyle capStyle = GDK_CAP_ROUND;
 926     switch (m_pen.GetCap())
 927     {
 928         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
 929         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
 930         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
 931     }
 932
 933     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
 934     switch (m_pen.GetJoin())
 935     {
 936         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
 937         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
 938         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
 939     }
 940
 941     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
 942
 943     m_pen.GetColour().CalcPixel( m_cmap );
 944     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
 945 }
 946
 947 void wxWindowDC::SetBrush( const wxBrush &brush )
 948 {
 949     wxCHECK_RET( Ok(), _T("invalid window dc") );
 950
 951     if (m_brush == brush) return;
 952
 953     m_brush = brush;
 954
 955     if (!m_brush.Ok()) return;
 956
 957     m_brush.GetColour().CalcPixel( m_cmap );
 958     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
 959
 960     GdkFill fillStyle = GDK_SOLID;
 961     switch (m_brush.GetStyle())
 962     {
 963       case wxSOLID:
 964       case wxTRANSPARENT:
 965          break;
 966       default:
 967          fillStyle = GDK_STIPPLED;
 968     }
 969
 970     gdk_gc_set_fill( m_brushGC, fillStyle );
 971
 972     if ((m_brush.GetStyle() == wxSTIPPLE) && (m_brush.GetStipple()->Ok()))
 973     {
 974         if (m_brush.GetStipple()->GetPixmap())
 975             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetPixmap() );
 976         else
 977             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetBitmap() );
 978     }
 979
 980     if (IS_HATCH(m_brush.GetStyle()))
 981     {
 982         int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
 983         gdk_gc_set_stipple( m_brushGC, hatches[num] );
 984     }
 985 }
 986
 987 void wxWindowDC::SetBackground( const wxBrush &brush )
 988 {
 989    /* CMB 21/7/98: Added SetBackground. Sets background brush
 990     * for Clear() and bg colour for shapes filled with cross-hatch brush */
 991
 992     wxCHECK_RET( Ok(), _T("invalid window dc") );
 993
 994     if (m_backgroundBrush == brush) return;
 995
 996     m_backgroundBrush = brush;
 997
 998     if (!m_backgroundBrush.Ok()) return;
 999
1000     m_backgroundBrush.GetColour().CalcPixel( m_cmap );
1001     gdk_gc_set_background( m_brushGC, m_backgroundBrush.GetColour().GetColor() );
1002     gdk_gc_set_background( m_penGC, m_backgroundBrush.GetColour().GetColor() );
1003     gdk_gc_set_background( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1004     gdk_gc_set_foreground( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1005
1006     GdkFill fillStyle = GDK_SOLID;
1007     switch (m_backgroundBrush.GetStyle())
1008     {
1009         case wxSOLID:
1010         case wxTRANSPARENT:
1011             break;
1012         default:
1013             fillStyle = GDK_STIPPLED;
1014     }
1015
1016     gdk_gc_set_fill( m_bgGC, fillStyle );
1017
1018     if (m_backgroundBrush.GetStyle() == wxSTIPPLE)
1019     {
1020         gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
1021     }
1022
1023     if (IS_HATCH(m_backgroundBrush.GetStyle()))
1024     {
1025         int num = m_backgroundBrush.GetStyle() - wxBDIAGONAL_HATCH;
1026         gdk_gc_set_stipple( m_bgGC, hatches[num] );
1027     }
1028 }
1029
1030 void wxWindowDC::SetLogicalFunction( int function )
1031 {
1032     wxCHECK_RET( Ok(), _T("invalid window dc") );
1033
1034     if (m_logicalFunction == function) return;
1035
1036     GdkFunction mode = GDK_COPY;
1037     switch (function)
1038     {
1039         case wxXOR:    mode = GDK_INVERT; break;
1040         case wxINVERT: mode = GDK_INVERT; break;
1041         default:       break;
1042     }
1043
1044     m_logicalFunction = function;
1045     gdk_gc_set_function( m_penGC, mode );
1046     gdk_gc_set_function( m_brushGC, mode );
1047     gdk_gc_set_function( m_textGC, mode );
1048 }
1049
1050 void wxWindowDC::SetTextForeground( const wxColour &col )
1051 {
1052     wxCHECK_RET( Ok(), _T("invalid window dc") );
1053
1054     if (m_textForegroundColour == col) return;
1055
1056     m_textForegroundColour = col;
1057     if (!m_textForegroundColour.Ok()) return;
1058
1059     m_textForegroundColour.CalcPixel( m_cmap );
1060     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
1061 }
1062
1063 void wxWindowDC::SetTextBackground( const wxColour &col )
1064 {
1065     wxCHECK_RET( Ok(), _T("invalid window dc") );
1066
1067     if (m_textBackgroundColour == col) return;
1068
1069     m_textBackgroundColour = col;
1070     if (!m_textBackgroundColour.Ok()) return;
1071
1072     m_textBackgroundColour.CalcPixel( m_cmap );
1073     gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
1074 }
1075
1076 void wxWindowDC::SetBackgroundMode( int mode )
1077 {
1078     wxCHECK_RET( Ok(), _T("invalid window dc") );
1079
1080     m_backgroundMode = mode;
1081
1082     // CMB 21/7/98: fill style of cross-hatch brushes is affected by
1083     // transparent/solid background mode
1084
1085     if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
1086     {
1087         gdk_gc_set_fill( m_brushGC,
1088           (m_backgroundMode == wxTRANSPARENT) ? GDK_STIPPLED : GDK_OPAQUE_STIPPLED);
1089     }
1090 }
1091
1092 void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
1093 {
1094     wxFAIL_MSG( _T("wxWindowDC::SetPalette not implemented") );
1095 }
1096
1097 void wxWindowDC::SetClippingRegion( long x, long y, long width, long height )
1098 {
1099     wxCHECK_RET( Ok(), _T("invalid window dc") );
1100
1101     wxDC::SetClippingRegion( x, y, width, height );
1102
1103     GdkRectangle rect;
1104     rect.x = XLOG2DEV(x);
1105     rect.y = YLOG2DEV(y);
1106     rect.width = XLOG2DEVREL(width);
1107     rect.height = YLOG2DEVREL(height);
1108     gdk_gc_set_clip_rectangle( m_penGC, &rect );
1109     gdk_gc_set_clip_rectangle( m_brushGC, &rect );
1110     gdk_gc_set_clip_rectangle( m_textGC, &rect );
1111     gdk_gc_set_clip_rectangle( m_bgGC, &rect );
1112 }
1113
1114 void wxWindowDC::SetClippingRegion( const wxRegion &region  )
1115 {
1116     wxCHECK_RET( Ok(), _T("invalid window dc") );
1117
1118     if (region.Empty())
1119     {
1120         DestroyClippingRegion();
1121         return;
1122     }
1123
1124     gdk_gc_set_clip_region( m_penGC, region.GetRegion() );
1125     gdk_gc_set_clip_region( m_brushGC, region.GetRegion() );
1126     gdk_gc_set_clip_region( m_textGC, region.GetRegion() );
1127     gdk_gc_set_clip_region( m_bgGC, region.GetRegion() );
1128 }
1129
1130 void wxWindowDC::DestroyClippingRegion()
1131 {
1132     wxCHECK_RET( Ok(), _T("invalid window dc") );
1133
1134     wxDC::DestroyClippingRegion();
1135
1136     gdk_gc_set_clip_rectangle( m_penGC, (GdkRectangle *) NULL );
1137     gdk_gc_set_clip_rectangle( m_brushGC, (GdkRectangle *) NULL );
1138     gdk_gc_set_clip_rectangle( m_textGC, (GdkRectangle *) NULL );
1139     gdk_gc_set_clip_rectangle( m_bgGC, (GdkRectangle *) NULL );
1140 }
1141
1142 void wxWindowDC::SetUpDC()
1143 {
1144     Destroy();
1145     m_ok = TRUE;
1146     m_logicalFunction = wxCOPY;
1147     m_penGC = gdk_gc_new( m_window );
1148     m_brushGC = gdk_gc_new( m_window );
1149     m_textGC = gdk_gc_new( m_window );
1150     m_bgGC = gdk_gc_new( m_window );
1151
1152     wxColour tmp_col( m_textForegroundColour );
1153     m_textForegroundColour = wxNullColour;
1154     SetTextForeground( tmp_col );
1155     tmp_col = m_textBackgroundColour;
1156     m_textBackgroundColour = wxNullColour;
1157     SetTextBackground( tmp_col );
1158
1159     wxPen tmp_pen( m_pen );
1160     m_pen = wxNullPen;
1161     SetPen( tmp_pen );
1162
1163     wxFont tmp_font( m_font );
1164     m_font = wxNullFont;
1165     SetFont( tmp_font );
1166
1167     wxBrush tmp_brush( m_brush );
1168     m_brush = wxNullBrush;
1169     SetBrush( tmp_brush );
1170
1171     tmp_brush = m_backgroundBrush;
1172     m_backgroundBrush = wxNullBrush;
1173     SetBackground( tmp_brush );
1174
1175     if (!hatch_bitmap)
1176     {
1177         hatch_bitmap    = hatches;
1178         hatch_bitmap[0] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, bdiag_bits, bdiag_width, bdiag_height );
1179         hatch_bitmap[1] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cdiag_bits, cdiag_width, cdiag_height );
1180         hatch_bitmap[2] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, fdiag_bits, fdiag_width, fdiag_height );
1181         hatch_bitmap[3] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cross_bits, cross_width, cross_height );
1182         hatch_bitmap[4] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, horiz_bits, horiz_width, horiz_height );
1183         hatch_bitmap[5] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, verti_bits, verti_width, verti_height );
1184     }
1185 }
1186
1187 void wxWindowDC::Destroy()
1188 {
1189     if (m_penGC) gdk_gc_unref( m_penGC );
1190     m_penGC = (GdkGC*) NULL;
1191     if (m_brushGC) gdk_gc_unref( m_brushGC );
1192     m_brushGC = (GdkGC*) NULL;
1193     if (m_textGC) gdk_gc_unref( m_textGC );
1194     m_textGC = (GdkGC*) NULL;
1195     if (m_bgGC) gdk_gc_unref( m_bgGC );
1196     m_bgGC = (GdkGC*) NULL;
1197 }
1198
1199 GdkWindow *wxWindowDC::GetWindow()
1200 {
1201     return m_window;
1202 }
1203
1204 // ----------------------------------- spline code ----------------------------------------
1205
1206 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1207                          double a3, double b3, double a4, double b4);
1208 void wx_clear_stack();
1209 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1210         double *y3, double *x4, double *y4);
1211 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1212           double x4, double y4);
1213 static bool wx_spline_add_point(double x, double y);
1214 static void wx_spline_draw_point_array(wxDC *dc);
1215
1216 wxList wx_spline_point_list;
1217
1218 #define         half(z1, z2)    ((z1+z2)/2.0)
1219 #define         THRESHOLD       5
1220
1221 /* iterative version */
1222
1223 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1224                  double b4)
1225 {
1226     register double  xmid, ymid;
1227     double           x1, y1, x2, y2, x3, y3, x4, y4;
1228
1229     wx_clear_stack();
1230     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1231
1232     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1233         xmid = (double)half(x2, x3);
1234         ymid = (double)half(y2, y3);
1235         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1236             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1237             wx_spline_add_point( x1, y1 );
1238             wx_spline_add_point( xmid, ymid );
1239         } else {
1240             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1241                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1242             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1243                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1244         }
1245     }
1246 }
1247
1248 /* utilities used by spline drawing routines */
1249
1250 typedef struct wx_spline_stack_struct {
1251     double           x1, y1, x2, y2, x3, y3, x4, y4;
1252 } Stack;
1253
1254 #define         SPLINE_STACK_DEPTH             20
1255 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1256 static Stack   *wx_stack_top;
1257 static int      wx_stack_count;
1258
1259 void wx_clear_stack()
1260 {
1261     wx_stack_top = wx_spline_stack;
1262     wx_stack_count = 0;
1263 }
1264
1265 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1266 {
1267     wx_stack_top->x1 = x1;
1268     wx_stack_top->y1 = y1;
1269     wx_stack_top->x2 = x2;
1270     wx_stack_top->y2 = y2;
1271     wx_stack_top->x3 = x3;
1272     wx_stack_top->y3 = y3;
1273     wx_stack_top->x4 = x4;
1274     wx_stack_top->y4 = y4;
1275     wx_stack_top++;
1276     wx_stack_count++;
1277 }
1278
1279 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1280                   double *x3, double *y3, double *x4, double *y4)
1281 {
1282     if (wx_stack_count == 0)
1283         return (0);
1284     wx_stack_top--;
1285     wx_stack_count--;
1286     *x1 = wx_stack_top->x1;
1287     *y1 = wx_stack_top->y1;
1288     *x2 = wx_stack_top->x2;
1289     *y2 = wx_stack_top->y2;
1290     *x3 = wx_stack_top->x3;
1291     *y3 = wx_stack_top->y3;
1292     *x4 = wx_stack_top->x4;
1293     *y4 = wx_stack_top->y4;
1294     return (1);
1295 }
1296
1297 static bool wx_spline_add_point(double x, double y)
1298 {
1299   wxPoint *point = new wxPoint ;
1300   point->x = (int) x;
1301   point->y = (int) y;
1302   wx_spline_point_list.Append((wxObject*)point);
1303   return TRUE;
1304 }
1305
1306 static void wx_spline_draw_point_array(wxDC *dc)
1307 {
1308   dc->DrawLines(&wx_spline_point_list, 0, 0 );
1309   wxNode *node = wx_spline_point_list.First();
1310   while (node)
1311   {
1312     wxPoint *point = (wxPoint *)node->Data();
1313     delete point;
1314     delete node;
1315     node = wx_spline_point_list.First();
1316   }
1317 }
1318
1319 void wxWindowDC::DrawSpline( wxList *points )
1320 {
1321     wxCHECK_RET( Ok(), _T("invalid window dc") );
1322
1323     wxPoint *p;
1324     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1325     double           x1, y1, x2, y2;
1326
1327     wxNode *node = points->First();
1328     p = (wxPoint *)node->Data();
1329
1330     x1 = p->x;
1331     y1 = p->y;
1332
1333     node = node->Next();
1334     p = (wxPoint *)node->Data();
1335
1336     x2 = p->x;
1337     y2 = p->y;
1338     cx1 = (double)((x1 + x2) / 2);
1339     cy1 = (double)((y1 + y2) / 2);
1340     cx2 = (double)((cx1 + x2) / 2);
1341     cy2 = (double)((cy1 + y2) / 2);
1342
1343     wx_spline_add_point(x1, y1);
1344
1345     while ((node = node->Next()) != NULL)
1346     {
1347         p = (wxPoint *)node->Data();
1348         x1 = x2;
1349         y1 = y2;
1350         x2 = p->x;
1351         y2 = p->y;
1352         cx4 = (double)(x1 + x2) / 2;
1353         cy4 = (double)(y1 + y2) / 2;
1354         cx3 = (double)(x1 + cx4) / 2;
1355         cy3 = (double)(y1 + cy4) / 2;
1356
1357         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1358
1359         cx1 = cx4;
1360         cy1 = cy4;
1361         cx2 = (double)(cx1 + x2) / 2;
1362         cy2 = (double)(cy1 + y2) / 2;
1363     }
1364
1365     wx_spline_add_point( cx1, cy1 );
1366     wx_spline_add_point( x2, y2 );
1367
1368     wx_spline_draw_point_array( this );
1369 }
1370
1371 // Resolution in pixels per logical inch
1372 wxSize wxWindowDC::GetPPI(void) const
1373 {
1374     return wxSize(100, 100);
1375 }
1376
1377 //-----------------------------------------------------------------------------
1378 // wxPaintDC
1379 //-----------------------------------------------------------------------------
1380
1381 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC,wxWindowDC)
1382
1383 wxPaintDC::wxPaintDC()
1384   : wxWindowDC()
1385 {
1386 }
1387
1388 wxPaintDC::wxPaintDC( wxWindow *win )
1389   : wxWindowDC( win )
1390 {
1391 }
1392
1393 //-----------------------------------------------------------------------------
1394 // wxClientDC
1395 //-----------------------------------------------------------------------------
1396
1397 IMPLEMENT_DYNAMIC_CLASS(wxClientDC,wxWindowDC)
1398
1399 wxClientDC::wxClientDC()
1400   : wxWindowDC()
1401 {
1402 }
1403
1404 wxClientDC::wxClientDC( wxWindow *win )
1405   : wxWindowDC( win )
1406 {
1407 }
1408