src/gtk1/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcclient.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Markus Holzem, Chris Breeze
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "dcclient.h"
  12 #endif
  13
  14 #include "wx/dcclient.h"
  15 #include "wx/dcmemory.h"
  16 #include "wx/image.h"
  17 #include <math.h>
  18
  19 #include "gdk/gdk.h"
  20 #include "gtk/gtk.h"
  21
  22 //-----------------------------------------------------------------------------
  23 // local data
  24 //-----------------------------------------------------------------------------
  25
  26 #include "bdiag.xbm"
  27 #include "fdiag.xbm"
  28 #include "cdiag.xbm"
  29 #include "horiz.xbm"
  30 #include "verti.xbm"
  31 #include "cross.xbm"
  32 #define  num_hatches 6
  33
  34 static GdkPixmap  *hatches[num_hatches];
  35 static GdkPixmap **hatch_bitmap = (GdkPixmap **) NULL;
  36
  37 //-----------------------------------------------------------------------------
  38 // constants
  39 //-----------------------------------------------------------------------------
  40
  41 #define RAD2DEG 57.2957795131
  42
  43 //-----------------------------------------------------------------------------
  44 // temporary implementation of the missing GDK function
  45 //-----------------------------------------------------------------------------
  46 #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     wxFont fontToUse = m_font;
 829     if (theFont) fontToUse = *theFont;
 830
 831     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 832     if (width) (*width) = long(gdk_string_width( font, string.mbc_str() ) / m_scaleX);
 833     if (height) (*height) = long((font->ascent + font->descent) / m_scaleY);
 834     if (descent) (*descent) = long(font->descent / m_scaleY);
 835     if (externalLeading) (*externalLeading) = 0;  // ??
 836 }
 837
 838 long wxWindowDC::GetCharWidth()
 839 {
 840     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 841     return long(gdk_string_width( font, "H" ) / m_scaleX);
 842 }
 843
 844 long wxWindowDC::GetCharHeight()
 845 {
 846     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 847     return long((font->ascent + font->descent) / m_scaleY);
 848 }
 849
 850 void wxWindowDC::Clear()
 851 {
 852     wxCHECK_RET( Ok(), _T("invalid window dc") );
 853
 854     /* - we either are a memory dc or have a window as the
 855        owner. anything else shouldn't happen.
 856        - we don't use gdk_window_clear() as we don't set
 857        the window's background colour anymore. it is too
 858        much pain to keep the DC's and the window's back-
 859        ground colour in synch. */
 860
 861     if (m_owner)
 862     {
 863         int width,height;
 864         m_owner->GetSize( &width, &height );
 865         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 866         return;
 867     }
 868
 869     if (m_isMemDC)
 870     {
 871         int width,height;
 872         GetSize( &width, &height );
 873         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 874         return;
 875     }
 876 }
 877
 878 void wxWindowDC::SetFont( const wxFont &font )
 879 {
 880     m_font = font;
 881 }
 882
 883 void wxWindowDC::SetPen( const wxPen &pen )
 884 {
 885     wxCHECK_RET( Ok(), _T("invalid window dc") );
 886
 887     if (m_pen == pen) return;
 888
 889     m_pen = pen;
 890
 891     if (!m_pen.Ok()) return;
 892
 893     gint width = m_pen.GetWidth();
 894     // CMB: if width is non-zero scale it with the dc
 895     if (width <= 0)
 896     {
 897         width = 1;
 898     }
 899     else
 900     {
 901         // X doesn't allow different width in x and y and so we take
 902         // the average
 903         double w = 0.5 + (abs(XLOG2DEVREL(width)) + abs(YLOG2DEVREL(width))) / 2.0;
 904         width = (int)w;
 905     }
 906
 907     GdkLineStyle lineStyle = GDK_LINE_SOLID;
 908     switch (m_pen.GetStyle())
 909     {
 910         case wxSOLID:      { lineStyle = GDK_LINE_SOLID;       break; }
 911         case wxDOT:        { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 912         case wxLONG_DASH:  { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 913         case wxSHORT_DASH: { lineStyle = GDK_LINE_ON_OFF_DASH; break; }
 914         case wxDOT_DASH:   { lineStyle = GDK_LINE_DOUBLE_DASH; break; }
 915     }
 916
 917     GdkCapStyle capStyle = GDK_CAP_ROUND;
 918     switch (m_pen.GetCap())
 919     {
 920         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
 921         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
 922         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
 923     }
 924
 925     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
 926     switch (m_pen.GetJoin())
 927     {
 928         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
 929         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
 930         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
 931     }
 932
 933     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
 934
 935     m_pen.GetColour().CalcPixel( m_cmap );
 936     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
 937 }
 938
 939 void wxWindowDC::SetBrush( const wxBrush &brush )
 940 {
 941     wxCHECK_RET( Ok(), _T("invalid window dc") );
 942
 943     if (m_brush == brush) return;
 944
 945     m_brush = brush;
 946
 947     if (!m_brush.Ok()) return;
 948
 949     m_brush.GetColour().CalcPixel( m_cmap );
 950     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
 951
 952     GdkFill fillStyle = GDK_SOLID;
 953     switch (m_brush.GetStyle())
 954     {
 955       case wxSOLID:
 956       case wxTRANSPARENT:
 957          break;
 958       default:
 959          fillStyle = GDK_STIPPLED;
 960     }
 961
 962     gdk_gc_set_fill( m_brushGC, fillStyle );
 963
 964     if ((m_brush.GetStyle() == wxSTIPPLE) && (m_brush.GetStipple()->Ok()))
 965     {
 966         if (m_brush.GetStipple()->GetPixmap())
 967             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetPixmap() );
 968         else
 969             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetBitmap() );
 970     }
 971
 972     if (IS_HATCH(m_brush.GetStyle()))
 973     {
 974         int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
 975         gdk_gc_set_stipple( m_brushGC, hatches[num] );
 976     }
 977 }
 978
 979 void wxWindowDC::SetBackground( const wxBrush &brush )
 980 {
 981    /* CMB 21/7/98: Added SetBackground. Sets background brush
 982     * for Clear() and bg colour for shapes filled with cross-hatch brush */
 983
 984     wxCHECK_RET( Ok(), _T("invalid window dc") );
 985
 986     if (m_backgroundBrush == brush) return;
 987
 988     m_backgroundBrush = brush;
 989
 990     if (!m_backgroundBrush.Ok()) return;
 991
 992     m_backgroundBrush.GetColour().CalcPixel( m_cmap );
 993     gdk_gc_set_background( m_brushGC, m_backgroundBrush.GetColour().GetColor() );
 994     gdk_gc_set_background( m_penGC, m_backgroundBrush.GetColour().GetColor() );
 995     gdk_gc_set_background( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
 996     gdk_gc_set_foreground( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
 997
 998     GdkFill fillStyle = GDK_SOLID;
 999     switch (m_backgroundBrush.GetStyle())
1000     {
1001         case wxSOLID:
1002         case wxTRANSPARENT:
1003             break;
1004         default:
1005             fillStyle = GDK_STIPPLED;
1006     }
1007
1008     gdk_gc_set_fill( m_bgGC, fillStyle );
1009
1010     if (m_backgroundBrush.GetStyle() == wxSTIPPLE)
1011     {
1012         gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
1013     }
1014
1015     if (IS_HATCH(m_backgroundBrush.GetStyle()))
1016     {
1017         int num = m_backgroundBrush.GetStyle() - wxBDIAGONAL_HATCH;
1018         gdk_gc_set_stipple( m_bgGC, hatches[num] );
1019     }
1020 }
1021
1022 void wxWindowDC::SetLogicalFunction( int function )
1023 {
1024     wxCHECK_RET( Ok(), _T("invalid window dc") );
1025
1026     if (m_logicalFunction == function) return;
1027
1028     GdkFunction mode = GDK_COPY;
1029     switch (function)
1030     {
1031         case wxXOR:          mode = GDK_INVERT; break;
1032         case wxINVERT:       mode = GDK_INVERT; break;
1033 #if (GDK_MINOR_VERSION > 0)
1034         case wxOR_REVERSE:   mode = GDK_OR_REVERSE; break;
1035         case wxAND_REVERSE:  mode = GDK_AND_REVERSE; break;
1036         case wxCLEAR:        mode = GDK_CLEAR; break;
1037         case wxSET:          mode = GDK_SET; break;
1038         case wxOR_INVERT:    mode = GDK_OR_INVERT; break;
1039         case wxAND:          mode = GDK_AND; break;
1040         case wxOR:           mode = GDK_OR; break;
1041         case wxEQUIV:        mode = GDK_EQUIV; break;
1042         case wxNAND:         mode = GDK_NAND; break;
1043         case wxAND_INVERT:   mode = GDK_AND_INVERT; break;
1044 /*   ?   wxSRC_INVERT   GDK_AND_REVERSE, GDK_OR_REVERSE, GDK_OR_INVERT */
1045 #endif
1046         default:       break;
1047     }
1048
1049     m_logicalFunction = function;
1050     gdk_gc_set_function( m_penGC, mode );
1051     gdk_gc_set_function( m_brushGC, mode );
1052     gdk_gc_set_function( m_textGC, mode );
1053 }
1054
1055 void wxWindowDC::SetTextForeground( const wxColour &col )
1056 {
1057     wxCHECK_RET( Ok(), _T("invalid window dc") );
1058
1059     if (m_textForegroundColour == col) return;
1060
1061     m_textForegroundColour = col;
1062     if (!m_textForegroundColour.Ok()) return;
1063
1064     m_textForegroundColour.CalcPixel( m_cmap );
1065     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
1066 }
1067
1068 void wxWindowDC::SetTextBackground( const wxColour &col )
1069 {
1070     wxCHECK_RET( Ok(), _T("invalid window dc") );
1071
1072     if (m_textBackgroundColour == col) return;
1073
1074     m_textBackgroundColour = col;
1075     if (!m_textBackgroundColour.Ok()) return;
1076
1077     m_textBackgroundColour.CalcPixel( m_cmap );
1078     gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
1079 }
1080
1081 void wxWindowDC::SetBackgroundMode( int mode )
1082 {
1083     wxCHECK_RET( Ok(), _T("invalid window dc") );
1084
1085     m_backgroundMode = mode;
1086
1087     // CMB 21/7/98: fill style of cross-hatch brushes is affected by
1088     // transparent/solid background mode
1089
1090     if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
1091     {
1092         gdk_gc_set_fill( m_brushGC,
1093           (m_backgroundMode == wxTRANSPARENT) ? GDK_STIPPLED : GDK_OPAQUE_STIPPLED);
1094     }
1095 }
1096
1097 void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
1098 {
1099     wxFAIL_MSG( _T("wxWindowDC::SetPalette not implemented") );
1100 }
1101
1102 void wxWindowDC::SetClippingRegion( long x, long y, long width, long height )
1103 {
1104     wxCHECK_RET( Ok(), _T("invalid window dc") );
1105
1106     wxDC::SetClippingRegion( x, y, width, height );
1107
1108     GdkRectangle rect;
1109     rect.x = XLOG2DEV(x);
1110     rect.y = YLOG2DEV(y);
1111     rect.width = XLOG2DEVREL(width);
1112     rect.height = YLOG2DEVREL(height);
1113     gdk_gc_set_clip_rectangle( m_penGC, &rect );
1114     gdk_gc_set_clip_rectangle( m_brushGC, &rect );
1115     gdk_gc_set_clip_rectangle( m_textGC, &rect );
1116     gdk_gc_set_clip_rectangle( m_bgGC, &rect );
1117 }
1118
1119 void wxWindowDC::SetClippingRegion( const wxRegion &region  )
1120 {
1121     wxCHECK_RET( Ok(), _T("invalid window dc") );
1122
1123     if (region.Empty())
1124     {
1125         DestroyClippingRegion();
1126         return;
1127     }
1128
1129     gdk_gc_set_clip_region( m_penGC, region.GetRegion() );
1130     gdk_gc_set_clip_region( m_brushGC, region.GetRegion() );
1131     gdk_gc_set_clip_region( m_textGC, region.GetRegion() );
1132     gdk_gc_set_clip_region( m_bgGC, region.GetRegion() );
1133 }
1134
1135 void wxWindowDC::DestroyClippingRegion()
1136 {
1137     wxCHECK_RET( Ok(), _T("invalid window dc") );
1138
1139     wxDC::DestroyClippingRegion();
1140
1141     gdk_gc_set_clip_rectangle( m_penGC, (GdkRectangle *) NULL );
1142     gdk_gc_set_clip_rectangle( m_brushGC, (GdkRectangle *) NULL );
1143     gdk_gc_set_clip_rectangle( m_textGC, (GdkRectangle *) NULL );
1144     gdk_gc_set_clip_rectangle( m_bgGC, (GdkRectangle *) NULL );
1145 }
1146
1147 void wxWindowDC::SetUpDC()
1148 {
1149     Destroy();
1150     m_ok = TRUE;
1151     m_logicalFunction = wxCOPY;
1152     m_penGC = gdk_gc_new( m_window );
1153     m_brushGC = gdk_gc_new( m_window );
1154     m_textGC = gdk_gc_new( m_window );
1155     m_bgGC = gdk_gc_new( m_window );
1156
1157     wxColour tmp_col( m_textForegroundColour );
1158     m_textForegroundColour = wxNullColour;
1159     SetTextForeground( tmp_col );
1160     tmp_col = m_textBackgroundColour;
1161     m_textBackgroundColour = wxNullColour;
1162     SetTextBackground( tmp_col );
1163
1164     wxPen tmp_pen( m_pen );
1165     m_pen = wxNullPen;
1166     SetPen( tmp_pen );
1167
1168     wxFont tmp_font( m_font );
1169     m_font = wxNullFont;
1170     SetFont( tmp_font );
1171
1172     wxBrush tmp_brush( m_brush );
1173     m_brush = wxNullBrush;
1174     SetBrush( tmp_brush );
1175
1176     tmp_brush = m_backgroundBrush;
1177     m_backgroundBrush = wxNullBrush;
1178     SetBackground( tmp_brush );
1179
1180     if (!hatch_bitmap)
1181     {
1182         hatch_bitmap    = hatches;
1183         hatch_bitmap[0] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, bdiag_bits, bdiag_width, bdiag_height );
1184         hatch_bitmap[1] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cdiag_bits, cdiag_width, cdiag_height );
1185         hatch_bitmap[2] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, fdiag_bits, fdiag_width, fdiag_height );
1186         hatch_bitmap[3] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cross_bits, cross_width, cross_height );
1187         hatch_bitmap[4] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, horiz_bits, horiz_width, horiz_height );
1188         hatch_bitmap[5] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, verti_bits, verti_width, verti_height );
1189     }
1190 }
1191
1192 void wxWindowDC::Destroy()
1193 {
1194     if (m_penGC) gdk_gc_unref( m_penGC );
1195     m_penGC = (GdkGC*) NULL;
1196     if (m_brushGC) gdk_gc_unref( m_brushGC );
1197     m_brushGC = (GdkGC*) NULL;
1198     if (m_textGC) gdk_gc_unref( m_textGC );
1199     m_textGC = (GdkGC*) NULL;
1200     if (m_bgGC) gdk_gc_unref( m_bgGC );
1201     m_bgGC = (GdkGC*) NULL;
1202 }
1203
1204 GdkWindow *wxWindowDC::GetWindow()
1205 {
1206     return m_window;
1207 }
1208
1209 // ----------------------------------- spline code ----------------------------------------
1210
1211 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1212                          double a3, double b3, double a4, double b4);
1213 void wx_clear_stack();
1214 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1215         double *y3, double *x4, double *y4);
1216 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1217           double x4, double y4);
1218 static bool wx_spline_add_point(double x, double y);
1219 static void wx_spline_draw_point_array(wxDC *dc);
1220
1221 wxList wx_spline_point_list;
1222
1223 #define         half(z1, z2)    ((z1+z2)/2.0)
1224 #define         THRESHOLD       5
1225
1226 /* iterative version */
1227
1228 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1229                  double b4)
1230 {
1231     register double  xmid, ymid;
1232     double           x1, y1, x2, y2, x3, y3, x4, y4;
1233
1234     wx_clear_stack();
1235     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1236
1237     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1238         xmid = (double)half(x2, x3);
1239         ymid = (double)half(y2, y3);
1240         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1241             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1242             wx_spline_add_point( x1, y1 );
1243             wx_spline_add_point( xmid, ymid );
1244         } else {
1245             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1246                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1247             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1248                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1249         }
1250     }
1251 }
1252
1253 /* utilities used by spline drawing routines */
1254
1255 typedef struct wx_spline_stack_struct {
1256     double           x1, y1, x2, y2, x3, y3, x4, y4;
1257 } Stack;
1258
1259 #define         SPLINE_STACK_DEPTH             20
1260 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1261 static Stack   *wx_stack_top;
1262 static int      wx_stack_count;
1263
1264 void wx_clear_stack()
1265 {
1266     wx_stack_top = wx_spline_stack;
1267     wx_stack_count = 0;
1268 }
1269
1270 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1271 {
1272     wx_stack_top->x1 = x1;
1273     wx_stack_top->y1 = y1;
1274     wx_stack_top->x2 = x2;
1275     wx_stack_top->y2 = y2;
1276     wx_stack_top->x3 = x3;
1277     wx_stack_top->y3 = y3;
1278     wx_stack_top->x4 = x4;
1279     wx_stack_top->y4 = y4;
1280     wx_stack_top++;
1281     wx_stack_count++;
1282 }
1283
1284 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1285                   double *x3, double *y3, double *x4, double *y4)
1286 {
1287     if (wx_stack_count == 0)
1288         return (0);
1289     wx_stack_top--;
1290     wx_stack_count--;
1291     *x1 = wx_stack_top->x1;
1292     *y1 = wx_stack_top->y1;
1293     *x2 = wx_stack_top->x2;
1294     *y2 = wx_stack_top->y2;
1295     *x3 = wx_stack_top->x3;
1296     *y3 = wx_stack_top->y3;
1297     *x4 = wx_stack_top->x4;
1298     *y4 = wx_stack_top->y4;
1299     return (1);
1300 }
1301
1302 static bool wx_spline_add_point(double x, double y)
1303 {
1304   wxPoint *point = new wxPoint ;
1305   point->x = (int) x;
1306   point->y = (int) y;
1307   wx_spline_point_list.Append((wxObject*)point);
1308   return TRUE;
1309 }
1310
1311 static void wx_spline_draw_point_array(wxDC *dc)
1312 {
1313   dc->DrawLines(&wx_spline_point_list, 0, 0 );
1314   wxNode *node = wx_spline_point_list.First();
1315   while (node)
1316   {
1317     wxPoint *point = (wxPoint *)node->Data();
1318     delete point;
1319     delete node;
1320     node = wx_spline_point_list.First();
1321   }
1322 }
1323
1324 void wxWindowDC::DrawSpline( wxList *points )
1325 {
1326     wxCHECK_RET( Ok(), _T("invalid window dc") );
1327
1328     wxPoint *p;
1329     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1330     double           x1, y1, x2, y2;
1331
1332     wxNode *node = points->First();
1333     p = (wxPoint *)node->Data();
1334
1335     x1 = p->x;
1336     y1 = p->y;
1337
1338     node = node->Next();
1339     p = (wxPoint *)node->Data();
1340
1341     x2 = p->x;
1342     y2 = p->y;
1343     cx1 = (double)((x1 + x2) / 2);
1344     cy1 = (double)((y1 + y2) / 2);
1345     cx2 = (double)((cx1 + x2) / 2);
1346     cy2 = (double)((cy1 + y2) / 2);
1347
1348     wx_spline_add_point(x1, y1);
1349
1350     while ((node = node->Next()) != NULL)
1351     {
1352         p = (wxPoint *)node->Data();
1353         x1 = x2;
1354         y1 = y2;
1355         x2 = p->x;
1356         y2 = p->y;
1357         cx4 = (double)(x1 + x2) / 2;
1358         cy4 = (double)(y1 + y2) / 2;
1359         cx3 = (double)(x1 + cx4) / 2;
1360         cy3 = (double)(y1 + cy4) / 2;
1361
1362         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1363
1364         cx1 = cx4;
1365         cy1 = cy4;
1366         cx2 = (double)(cx1 + x2) / 2;
1367         cy2 = (double)(cy1 + y2) / 2;
1368     }
1369
1370     wx_spline_add_point( cx1, cy1 );
1371     wx_spline_add_point( x2, y2 );
1372
1373     wx_spline_draw_point_array( this );
1374 }
1375
1376 // Resolution in pixels per logical inch
1377 wxSize wxWindowDC::GetPPI(void) const
1378 {
1379     return wxSize(100, 100);
1380 }
1381
1382 //-----------------------------------------------------------------------------
1383 // wxPaintDC
1384 //-----------------------------------------------------------------------------
1385
1386 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC,wxWindowDC)
1387
1388 wxPaintDC::wxPaintDC()
1389   : wxWindowDC()
1390 {
1391 }
1392
1393 wxPaintDC::wxPaintDC( wxWindow *win )
1394   : wxWindowDC( win )
1395 {
1396 }
1397
1398 //-----------------------------------------------------------------------------
1399 // wxClientDC
1400 //-----------------------------------------------------------------------------
1401
1402 IMPLEMENT_DYNAMIC_CLASS(wxClientDC,wxWindowDC)
1403
1404 wxClientDC::wxClientDC()
1405   : wxWindowDC()
1406 {
1407 }
1408
1409 wxClientDC::wxClientDC( wxWindow *win )
1410   : wxWindowDC( win )
1411 {
1412 }
1413