src/gtk/dcclient.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dcclient.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Markus Holzem, Chris Breeze
   7 // Licence:           wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "dcclient.h"
  12 #endif
  13
  14 #include "wx/dcclient.h"
  15 #include "wx/dcmemory.h"
  16 #include "wx/image.h"
  17 #include "wx/gtk/win_gtk.h"
  18
  19 #include <math.h>               // for floating-point functions
  20 #include <gdk/gdk.h>
  21 #include <gtk/gtk.h>
  22
  23 //-----------------------------------------------------------------------------
  24 // local data
  25 //-----------------------------------------------------------------------------
  26
  27 #include "bdiag.xbm"
  28 #include "fdiag.xbm"
  29 #include "cdiag.xbm"
  30 #include "horiz.xbm"
  31 #include "verti.xbm"
  32 #include "cross.xbm"
  33 #define  num_hatches 6
  34
  35 static GdkPixmap  *hatches[num_hatches];
  36 static GdkPixmap **hatch_bitmap = (GdkPixmap **) NULL;
  37
  38 //-----------------------------------------------------------------------------
  39 // constants
  40 //-----------------------------------------------------------------------------
  41
  42 #define RAD2DEG 57.2957795131
  43
  44 //-----------------------------------------------------------------------------
  45 // temporary implementation of the missing GDK function
  46 //-----------------------------------------------------------------------------
  47
  48 #include "gdk/gdkprivate.h"
  49
  50 void gdk_draw_bitmap     (GdkDrawable  *drawable,
  51                           GdkGC               *gc,
  52                           GdkDrawable  *src,
  53                           gint                xsrc,
  54                           gint                ysrc,
  55                           gint                xdest,
  56                           gint                ydest,
  57                           gint                width,
  58                           gint                height)
  59 {
  60     GdkWindowPrivate *drawable_private;
  61     GdkWindowPrivate *src_private;
  62     GdkGCPrivate *gc_private;
  63
  64     g_return_if_fail (drawable != NULL);
  65     g_return_if_fail (src != NULL);
  66     g_return_if_fail (gc != NULL);
  67
  68     drawable_private = (GdkWindowPrivate*) drawable;
  69     src_private = (GdkWindowPrivate*) src;
  70     if (drawable_private->destroyed || src_private->destroyed)
  71         return;
  72
  73     gc_private = (GdkGCPrivate*) gc;
  74
  75     if (width == -1) width = src_private->width;
  76     if (height == -1) height = src_private->height;
  77
  78     XCopyPlane( drawable_private->xdisplay,
  79                 src_private->xwindow,
  80                 drawable_private->xwindow,
  81                 gc_private->xgc,
  82                 xsrc, ysrc,
  83                 width, height,
  84                 xdest, ydest,
  85                 1 );
  86 }
  87
  88 //-----------------------------------------------------------------------------
  89 // wxWindowDC
  90 //-----------------------------------------------------------------------------
  91
  92 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
  93
  94 wxWindowDC::wxWindowDC()
  95 {
  96     m_penGC = (GdkGC *) NULL;
  97     m_brushGC = (GdkGC *) NULL;
  98     m_textGC = (GdkGC *) NULL;
  99     m_bgGC = (GdkGC *) NULL;
 100     m_cmap = (GdkColormap *) NULL;
 101     m_isMemDC = FALSE;
 102     m_owner = (wxWindow *)NULL;
 103 }
 104
 105 wxWindowDC::wxWindowDC( wxWindow *window )
 106 {
 107     m_penGC = (GdkGC *) NULL;
 108     m_brushGC = (GdkGC *) NULL;
 109     m_textGC = (GdkGC *) NULL;
 110     m_bgGC = (GdkGC *) NULL;
 111     m_cmap = (GdkColormap *) NULL;
 112     m_owner = (wxWindow *)NULL;
 113     m_isMemDC = FALSE;
 114     m_font = window->GetFont();
 115
 116     wxASSERT_MSG( window, wxT("DC needs a window") );
 117
 118     GtkWidget *widget = window->m_wxwindow;
 119
 120     wxASSERT_MSG( widget, wxT("DC needs a widget") );
 121
 122     GtkPizza *pizza = GTK_PIZZA( widget );
 123     m_window = pizza->bin_window;
 124
 125     /* not realized ? */
 126     if (!m_window)
 127     {
 128          /* don't report problems */
 129          m_ok = TRUE;
 130
 131          return;
 132     }
 133
 134     if (window->m_wxwindow)
 135         m_cmap = gtk_widget_get_colormap( window->m_wxwindow );
 136     else
 137         m_cmap = gtk_widget_get_colormap( window->m_widget );
 138
 139     SetUpDC();
 140
 141     /* this must be done after SetUpDC, bacause SetUpDC calls the
 142        repective SetBrush, SetPen, SetBackground etc functions
 143        to set up the DC. SetBackground call m_owner->SetBackground
 144        and this might not be desired as the standard dc background
 145        is white whereas a window might assume gray to be the
 146        standard (as e.g. wxStatusBar) */
 147
 148     m_owner = window;
 149 }
 150
 151 wxWindowDC::~wxWindowDC()
 152 {
 153     Destroy();
 154 }
 155
 156 void wxWindowDC::DoFloodFill( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 157                            const wxColour &WXUNUSED(col), int WXUNUSED(style) )
 158 {
 159     wxFAIL_MSG( wxT("wxWindowDC::DoFloodFill not implemented") );
 160 }
 161
 162 bool wxWindowDC::DoGetPixel( wxCoord WXUNUSED(x1), wxCoord WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
 163 {
 164     wxFAIL_MSG( wxT("wxWindowDC::DoGetPixel not implemented") );
 165     return FALSE;
 166 }
 167
 168 void wxWindowDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 169 {
 170     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 171
 172     if (m_pen.GetStyle() != wxTRANSPARENT)
 173     {
 174         if (m_window)
 175             gdk_draw_line( m_window, m_penGC, XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2) );
 176
 177         CalcBoundingBox(x1, y1);
 178         CalcBoundingBox(x2, y2);
 179     }
 180 }
 181
 182 void wxWindowDC::DoCrossHair( wxCoord x, wxCoord y )
 183 {
 184     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 185
 186     if (m_pen.GetStyle() != wxTRANSPARENT)
 187     {
 188         int w = 0;
 189         int h = 0;
 190         GetSize( &w, &h );
 191         wxCoord xx = XLOG2DEV(x);
 192         wxCoord yy = YLOG2DEV(y);
 193         if (m_window)
 194         {
 195             gdk_draw_line( m_window, m_penGC, 0, yy, XLOG2DEVREL(w), yy );
 196             gdk_draw_line( m_window, m_penGC, xx, 0, xx, YLOG2DEVREL(h) );
 197         }
 198     }
 199 }
 200
 201 void wxWindowDC::DoDrawArc( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2,
 202                             wxCoord xc, wxCoord yc )
 203 {
 204     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 205
 206     wxCoord xx1 = XLOG2DEV(x1);
 207     wxCoord yy1 = YLOG2DEV(y1);
 208     wxCoord xx2 = XLOG2DEV(x2);
 209     wxCoord yy2 = YLOG2DEV(y2);
 210     wxCoord xxc = XLOG2DEV(xc);
 211     wxCoord yyc = YLOG2DEV(yc);
 212     double dx = xx1 - xxc;
 213     double dy = yy1 - yyc;
 214     double radius = sqrt((double)(dx*dx+dy*dy));
 215     wxCoord   r      = (wxCoord)radius;
 216     double radius1, radius2;
 217
 218     if (xx1 == xx2 && yy1 == yy2)
 219     {
 220         radius1 = 0.0;
 221         radius2 = 360.0;
 222     }
 223     else
 224     if (radius == 0.0)
 225     {
 226         radius1 = radius2 = 0.0;
 227     }
 228     else
 229     {
 230         radius1 = (xx1 - xxc == 0) ?
 231             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 232             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 233         radius2 = (xx2 - xxc == 0) ?
 234             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 235             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 236     }
 237     wxCoord alpha1 = wxCoord(radius1 * 64.0);
 238     wxCoord alpha2 = wxCoord((radius2 - radius1) * 64.0);
 239     while (alpha2 <= 0) alpha2 += 360*64;
 240     while (alpha1 > 360*64) alpha1 -= 360*64;
 241
 242     if (m_window)
 243     {
 244         if (m_brush.GetStyle() != wxTRANSPARENT)
 245             gdk_draw_arc( m_window, m_brushGC, TRUE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 246
 247         if (m_pen.GetStyle() != wxTRANSPARENT)
 248             gdk_draw_arc( m_window, m_penGC, FALSE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 249     }
 250
 251     CalcBoundingBox (x1, y1);
 252     CalcBoundingBox (x2, y2);
 253 }
 254
 255 void wxWindowDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double sa, double ea )
 256 {
 257     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 258
 259     wxCoord xx = XLOG2DEV(x);
 260     wxCoord yy = YLOG2DEV(y);
 261     wxCoord ww = m_signX * XLOG2DEVREL(width);
 262     wxCoord hh = m_signY * YLOG2DEVREL(height);
 263
 264     // CMB: handle -ve width and/or height
 265     if (ww < 0) { ww = -ww; xx = xx - ww; }
 266     if (hh < 0) { hh = -hh; yy = yy - hh; }
 267
 268     if (m_window)
 269     {
 270         wxCoord start = wxCoord(sa * 64.0);
 271         wxCoord end = wxCoord(ea * 64.0);
 272
 273         if (m_brush.GetStyle() != wxTRANSPARENT)
 274             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, start, end );
 275
 276         if (m_pen.GetStyle() != wxTRANSPARENT)
 277             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, start, end );
 278     }
 279
 280     CalcBoundingBox (x, y);
 281     CalcBoundingBox (x + width, y + height);
 282 }
 283
 284 void wxWindowDC::DoDrawPoint( wxCoord x, wxCoord y )
 285 {
 286     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 287
 288     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 289         gdk_draw_point( m_window, m_penGC, XLOG2DEV(x), YLOG2DEV(y) );
 290
 291     CalcBoundingBox (x, y);
 292 }
 293
 294 void wxWindowDC::DoDrawLines( int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset )
 295 {
 296     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 297
 298     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 299     if (n <= 0) return;
 300
 301     CalcBoundingBox( points[0].x + xoffset, points[0].y + yoffset );
 302
 303     for (int i = 0; i < n-1; i++)
 304     {
 305         wxCoord x1 = XLOG2DEV(points[i].x + xoffset);
 306         wxCoord x2 = XLOG2DEV(points[i+1].x + xoffset);
 307         wxCoord y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 308         wxCoord y2 = YLOG2DEV(points[i+1].y + yoffset);
 309
 310         if (m_window)
 311             gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 312
 313         CalcBoundingBox( points[i+1].x + xoffset, points[i+1].y + yoffset );
 314     }
 315 }
 316
 317 void wxWindowDC::DoDrawPolygon( int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset, int WXUNUSED(fillStyle) )
 318 {
 319     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 320
 321     if (n <= 0) return;
 322
 323     GdkPoint *gdkpoints = new GdkPoint[n+1];
 324     int i;
 325     for (i = 0 ; i < n ; i++)
 326     {
 327         gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
 328         gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
 329
 330         CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset );
 331     }
 332
 333     if ((m_brush.GetStyle() != wxTRANSPARENT) && m_window)
 334         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 335
 336     // To do: Fillstyle
 337
 338     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 339     {
 340         for (i = 0 ; i < n ; i++)
 341         {
 342             gdk_draw_line( m_window, m_penGC,
 343                            gdkpoints[i%n].x,
 344                            gdkpoints[i%n].y,
 345                            gdkpoints[(i+1)%n].x,
 346                            gdkpoints[(i+1)%n].y);
 347         }
 348     }
 349
 350     delete[] gdkpoints;
 351 }
 352
 353 void wxWindowDC::DoDrawRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 354 {
 355     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 356
 357     wxCoord xx = XLOG2DEV(x);
 358     wxCoord yy = YLOG2DEV(y);
 359     wxCoord ww = m_signX * XLOG2DEVREL(width);
 360     wxCoord hh = m_signY * YLOG2DEVREL(height);
 361
 362     // CMB: draw nothing if transformed w or h is 0
 363     if (ww == 0 || hh == 0) return;
 364
 365     // CMB: handle -ve width and/or height
 366     if (ww < 0) { ww = -ww; xx = xx - ww; }
 367     if (hh < 0) { hh = -hh; yy = yy - hh; }
 368
 369     if (m_window)
 370     {
 371         if (m_brush.GetStyle() != wxTRANSPARENT)
 372             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 373
 374         if (m_pen.GetStyle() != wxTRANSPARENT)
 375             gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 376     }
 377
 378     CalcBoundingBox( x, y );
 379     CalcBoundingBox( x + width, y + height );
 380 }
 381
 382 void wxWindowDC::DoDrawRoundedRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
 383 {
 384     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 385
 386     if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 387
 388     wxCoord xx = XLOG2DEV(x);
 389     wxCoord yy = YLOG2DEV(y);
 390     wxCoord ww = m_signX * XLOG2DEVREL(width);
 391     wxCoord hh = m_signY * YLOG2DEVREL(height);
 392     wxCoord rr = XLOG2DEVREL((wxCoord)radius);
 393
 394     // CMB: handle -ve width and/or height
 395     if (ww < 0) { ww = -ww; xx = xx - ww; }
 396     if (hh < 0) { hh = -hh; yy = yy - hh; }
 397
 398     // CMB: if radius is zero use DrawRectangle() instead to avoid
 399     // X drawing errors with small radii
 400     if (rr == 0)
 401     {
 402         DrawRectangle( x, y, width, height );
 403         return;
 404     }
 405
 406     // CMB: draw nothing if transformed w or h is 0
 407     if (ww == 0 || hh == 0) return;
 408
 409     // CMB: adjust size if outline is drawn otherwise the result is
 410     // 1 pixel too wide and high
 411     if (m_pen.GetStyle() != wxTRANSPARENT)
 412     {
 413         ww--;
 414         hh--;
 415     }
 416
 417     if (m_window)
 418     {
 419         // CMB: ensure dd is not larger than rectangle otherwise we
 420         // get an hour glass shape
 421         wxCoord dd = 2 * rr;
 422         if (dd > ww) dd = ww;
 423         if (dd > hh) dd = hh;
 424         rr = dd / 2;
 425
 426         if (m_brush.GetStyle() != wxTRANSPARENT)
 427         {
 428             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 429             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 430             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 431             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 432             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 433             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 434         }
 435
 436         if (m_pen.GetStyle() != wxTRANSPARENT)
 437         {
 438             gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 439             gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 440             gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 441             gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 442             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 443             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 444             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 445             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 446         }
 447     }
 448
 449     // this ignores the radius
 450     CalcBoundingBox( x, y );
 451     CalcBoundingBox( x + width, y + height );
 452 }
 453
 454 void wxWindowDC::DoDrawEllipse( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 455 {
 456     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 457
 458     wxCoord xx = XLOG2DEV(x);
 459     wxCoord yy = YLOG2DEV(y);
 460     wxCoord ww = m_signX * XLOG2DEVREL(width);
 461     wxCoord hh = m_signY * YLOG2DEVREL(height);
 462
 463     // CMB: handle -ve width and/or height
 464     if (ww < 0) { ww = -ww; xx = xx - ww; }
 465     if (hh < 0) { hh = -hh; yy = yy - hh; }
 466
 467     if (m_window)
 468     {
 469         if (m_brush.GetStyle() != wxTRANSPARENT)
 470             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 471
 472         if (m_pen.GetStyle() != wxTRANSPARENT)
 473             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 474     }
 475
 476     CalcBoundingBox( x - width, y - height );
 477     CalcBoundingBox( x + width, y + height );
 478 }
 479
 480 void wxWindowDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
 481 {
 482     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 483     DoDrawBitmap( (const wxBitmap&)icon, x, y, (bool)TRUE );
 484 }
 485
 486 void wxWindowDC::DoDrawBitmap( const wxBitmap &bitmap,
 487                                wxCoord x, wxCoord y,
 488                                bool useMask )
 489 {
 490     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 491
 492     wxCHECK_RET( bitmap.Ok(), wxT("invalid bitmap") );
 493
 494     /* scale/translate size and position */
 495
 496     int xx = XLOG2DEV(x);
 497     int yy = YLOG2DEV(y);
 498
 499     int w = bitmap.GetWidth();
 500     int h = bitmap.GetHeight();
 501
 502     CalcBoundingBox( x, y );
 503     CalcBoundingBox( x + w, y + h );
 504
 505     if (!m_window) return;
 506
 507     int ww = XLOG2DEVREL(w);
 508     int hh = YLOG2DEVREL(h);
 509
 510     /* scale bitmap if required */
 511
 512     wxBitmap use_bitmap;
 513
 514     if ((w != ww) || (h != hh))
 515     {
 516         wxImage image( bitmap );
 517         image = image.Scale( ww, hh );
 518
 519         use_bitmap = image.ConvertToBitmap();
 520     }
 521     else
 522     {
 523         use_bitmap = bitmap;
 524     }
 525
 526     /* apply mask if any */
 527
 528     GdkBitmap *mask = (GdkBitmap *) NULL;
 529     if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 530
 531     if (useMask && mask)
 532     {
 533         gdk_gc_set_clip_mask( m_penGC, mask );
 534         gdk_gc_set_clip_origin( m_penGC, xx, yy );
 535     }
 536
 537     /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 538
 539     GdkPixmap *pm = use_bitmap.GetPixmap();
 540     if (pm)
 541     {
 542         gdk_draw_pixmap( m_window, m_penGC, pm, 0, 0, xx, yy, -1, -1 );
 543     }
 544     else
 545     {
 546         GdkBitmap *bm = use_bitmap.GetBitmap();
 547         if (bm)
 548         {
 549             gdk_draw_bitmap( m_window, m_penGC, bm, 0, 0, xx, yy, -1, -1 );
 550         }
 551     }
 552
 553     /* remove mask again if any */
 554
 555     if (useMask && mask)
 556     {
 557         gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 558         gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 559     }
 560 }
 561
 562 bool wxWindowDC::DoBlit( wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 563                          wxDC *source, wxCoord xsrc, wxCoord ysrc,
 564                          int logical_func, bool useMask )
 565 {
 566    /* this is the nth try to get this utterly useless function to
 567       work. it now completely ignores the scaling or translation
 568       of the source dc, but scales correctly on the target dc and
 569       knows about possible mask information in a memory dc. */
 570
 571     wxCHECK_MSG( Ok(), FALSE, wxT("invalid window dc") );
 572
 573     wxCHECK_MSG( source, FALSE, wxT("invalid source dc") );
 574
 575     if (!m_window) return FALSE;
 576
 577     wxClientDC *srcDC = (wxClientDC*)source;
 578     wxMemoryDC *memDC = (wxMemoryDC*)source;
 579
 580     bool use_bitmap_method = FALSE;
 581
 582     if (srcDC->m_isMemDC)
 583     {
 584         if (!memDC->m_selected.Ok()) return FALSE;
 585
 586         /* we use the "XCopyArea" way to copy a memory dc into
 587            y different window if the memory dc BOTH
 588            a) doesn't have any mask or its mask isn't used
 589            b) it is clipped
 590            c) is not 1-bit */
 591
 592         if (useMask && (memDC->m_selected.GetMask()))
 593         {
 594            /* we HAVE TO use the direct way for memory dcs
 595               that have mask since the XCopyArea doesn't know
 596               about masks */
 597             use_bitmap_method = TRUE;
 598         }
 599         else if (memDC->m_selected.GetDepth() == 1)
 600         {
 601            /* we HAVE TO use the direct way for memory dcs
 602               that are bitmaps because XCopyArea doesn't cope
 603               with different bit depths */
 604             use_bitmap_method = TRUE;
 605         }
 606         else if ((xsrc == 0) && (ysrc == 0) &&
 607                  (width == memDC->m_selected.GetWidth()) &&
 608                  (height == memDC->m_selected.GetHeight()))
 609         {
 610            /* we SHOULD use the direct way if all of the bitmap
 611               in the memory dc is copied in which case XCopyArea
 612               wouldn't be able able to boost performace by reducing
 613               the area to be scaled */
 614             use_bitmap_method = TRUE;
 615         }
 616         else
 617         {
 618             use_bitmap_method = FALSE;
 619         }
 620     }
 621
 622     CalcBoundingBox( xdest, ydest );
 623     CalcBoundingBox( xdest + width, ydest + height );
 624
 625     int old_logical_func = m_logicalFunction;
 626     SetLogicalFunction( logical_func );
 627
 628     if (use_bitmap_method)
 629     {
 630         /* scale/translate bitmap size */
 631
 632         wxCoord bm_width = memDC->m_selected.GetWidth();
 633         wxCoord bm_height = memDC->m_selected.GetHeight();
 634
 635         wxCoord bm_ww = XLOG2DEVREL( bm_width );
 636         wxCoord bm_hh = YLOG2DEVREL( bm_height );
 637
 638         /* scale bitmap if required */
 639
 640         wxBitmap use_bitmap;
 641
 642         if ((bm_width != bm_ww) || (bm_height != bm_hh))
 643         {
 644             wxImage image( memDC->m_selected );
 645             image = image.Scale( bm_ww, bm_hh );
 646
 647             use_bitmap = image.ConvertToBitmap();
 648         }
 649         else
 650         {
 651             use_bitmap = memDC->m_selected;
 652         }
 653
 654         /* scale/translate size and position */
 655
 656         wxCoord xx = XLOG2DEV(xdest);
 657         wxCoord yy = YLOG2DEV(ydest);
 658
 659         wxCoord ww = XLOG2DEVREL(width);
 660         wxCoord hh = YLOG2DEVREL(height);
 661
 662         /* apply mask if any */
 663
 664         GdkBitmap *mask = (GdkBitmap *) NULL;
 665         if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 666
 667         if (useMask && mask)
 668         {
 669             gdk_gc_set_clip_mask( m_penGC, mask );
 670             gdk_gc_set_clip_origin( m_penGC, xx, yy );
 671         }
 672
 673         /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 674
 675         GdkPixmap *pm = use_bitmap.GetPixmap();
 676         if (pm)
 677         {
 678             gdk_draw_pixmap( m_window, m_penGC, pm, xsrc, ysrc, xx, yy, ww, hh );
 679         }
 680         else
 681         {
 682             GdkBitmap *bm = use_bitmap.GetBitmap();
 683             if (bm)
 684             {
 685                 /* we use the textGC here because blitting a bitmap is done
 686                    using the current text colour */
 687                 gdk_draw_bitmap( m_window, m_textGC, bm, xsrc, ysrc, xx, yy, ww, hh );
 688             }
 689         }
 690
 691         /* remove mask again if any */
 692
 693         if (useMask && mask)
 694         {
 695             gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 696             gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 697         }
 698     }
 699     else /* use_bitmap_method */
 700     {
 701         /* scale/translate size and position */
 702
 703         wxCoord xx = XLOG2DEV(xdest);
 704         wxCoord yy = YLOG2DEV(ydest);
 705
 706         wxCoord ww = XLOG2DEVREL(width);
 707         wxCoord hh = YLOG2DEVREL(height);
 708
 709         if ((width != ww) || (height != hh))
 710         {
 711             /* draw source window into a bitmap as we cannot scale
 712                a window in contrast to a bitmap. this would actually
 713                work with memory dcs as well, but we'd lose the mask
 714                information and waste one step in this process since
 715                a memory already has a bitmap. all this is slightly
 716                inefficient as we could take an XImage directly from
 717                an X window, but we'd then also have to care that
 718                the window is not outside the screen (in which case
 719                we'd get a BadMatch or what not).
 720                Is a double XGetImage and combined XGetPixel and
 721                XPutPixel really faster? I'm not sure. look at wxXt
 722                for a different implementation of the same problem. */
 723
 724             wxBitmap bitmap( width, height );
 725             gdk_window_copy_area( bitmap.GetPixmap(), m_penGC, 0, 0,
 726                                   srcDC->GetWindow(),
 727                                   xsrc, ysrc, width, height );
 728
 729             /* scale image */
 730
 731             wxImage image( bitmap );
 732             image = image.Scale( ww, hh );
 733
 734             /* convert to bitmap */
 735
 736             bitmap = image.ConvertToBitmap();
 737
 738             /* draw scaled bitmap */
 739
 740             gdk_draw_pixmap( m_window, m_penGC, bitmap.GetPixmap(), 0, 0, xx, yy, -1, -1 );
 741
 742         }
 743         else
 744         {
 745             /* no scaling and not a memory dc with a mask either */
 746
 747             gdk_window_copy_area( m_window, m_penGC, xx, yy,
 748                                   srcDC->GetWindow(),
 749                                   xsrc, ysrc, width, height );
 750         }
 751     }
 752
 753     SetLogicalFunction( old_logical_func );
 754     return TRUE;
 755 }
 756
 757 void wxWindowDC::DoDrawText( const wxString &text, wxCoord x, wxCoord y )
 758 {
 759     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 760
 761     if (!m_window) return;
 762
 763     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 764
 765     wxCHECK_RET( font, wxT("invalid font") );
 766
 767     x = XLOG2DEV(x);
 768     y = YLOG2DEV(y);
 769
 770     /* CMB 21/5/98: draw text background if mode is wxSOLID */
 771     if (m_backgroundMode == wxSOLID)
 772     {
 773         wxCoord width = gdk_string_width( font, text.mbc_str() );
 774         wxCoord height = font->ascent + font->descent;
 775         gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 776         gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 777         gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 778     }
 779     gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text.mbc_str() );
 780
 781     /* CMB 17/7/98: simple underline: ignores scaling and underlying
 782        X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 783        properties (see wxXt implementation) */
 784     if (m_font.GetUnderlined())
 785     {
 786         wxCoord width = gdk_string_width( font, text.mbc_str() );
 787         wxCoord ul_y = y + font->ascent;
 788         if (font->descent > 0) ul_y++;
 789         gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 790     }
 791
 792     wxCoord w, h;
 793     GetTextExtent (text, &w, &h);
 794     CalcBoundingBox (x + w, y + h);
 795     CalcBoundingBox (x, y);
 796 }
 797
 798 void wxWindowDC::DoGetTextExtent(const wxString &string,
 799                                  wxCoord *width, wxCoord *height,
 800                                  wxCoord *descent, wxCoord *externalLeading,
 801                                  wxFont *theFont) const
 802 {
 803     wxFont fontToUse = m_font;
 804     if (theFont) fontToUse = *theFont;
 805
 806     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 807     if (width) (*width) = wxCoord(gdk_string_width( font, string.mbc_str() ) / m_scaleX);
 808     if (height) (*height) = wxCoord((font->ascent + font->descent) / m_scaleY);
 809     if (descent) (*descent) = wxCoord(font->descent / m_scaleY);
 810     if (externalLeading) (*externalLeading) = 0;  // ??
 811 }
 812
 813 wxCoord wxWindowDC::GetCharWidth() const
 814 {
 815     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 816     wxCHECK_MSG( font, -1, _T("invalid font") );
 817
 818     return wxCoord(gdk_string_width( font, "H" ) / m_scaleX);
 819 }
 820
 821 wxCoord wxWindowDC::GetCharHeight() const
 822 {
 823     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 824     wxCHECK_MSG( font, -1, _T("invalid font") );
 825
 826     return wxCoord((font->ascent + font->descent) / m_scaleY);
 827 }
 828
 829 void wxWindowDC::Clear()
 830 {
 831     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 832
 833     if (!m_window) return;
 834
 835     /* - we either are a memory dc or have a window as the
 836        owner. anything else shouldn't happen.
 837        - we don't use gdk_window_clear() as we don't set
 838        the window's background colour anymore. it is too
 839        much pain to keep the DC's and the window's back-
 840        ground colour in synch. */
 841
 842     if (m_owner)
 843     {
 844         int width,height;
 845         m_owner->GetSize( &width, &height );
 846         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 847         return;
 848     }
 849
 850     if (m_isMemDC)
 851     {
 852         int width,height;
 853         GetSize( &width, &height );
 854         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 855         return;
 856     }
 857 }
 858
 859 void wxWindowDC::SetFont( const wxFont &font )
 860 {
 861     m_font = font;
 862 }
 863
 864 void wxWindowDC::SetPen( const wxPen &pen )
 865 {
 866     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 867
 868     if (m_pen == pen) return;
 869
 870     m_pen = pen;
 871
 872     if (!m_pen.Ok()) return;
 873
 874     if (!m_window) return;
 875
 876     gint width = m_pen.GetWidth();
 877     if (width <= 0)
 878     {
 879         // CMB: if width is non-zero scale it with the dc
 880         width = 1;
 881     }
 882     else
 883     {
 884         // X doesn't allow different width in x and y and so we take
 885         // the average
 886         double w = 0.5 +
 887                    ( fabs((double) XLOG2DEVREL(width)) +
 888                      fabs((double) YLOG2DEVREL(width)) ) / 2.0;
 889         width = (int)w;
 890     }
 891
 892     static const char dotted[] = {1, 1};
 893     static const char short_dashed[] = {2, 2};
 894     static const char wxCoord_dashed[] = {2, 4};
 895     static const char dotted_dashed[] = {3, 3, 1, 3};
 896
 897     // We express dash pattern in pen width unit, so we are
 898     // independent of zoom factor and so on...
 899     int req_nb_dash;
 900     const char *req_dash;
 901
 902     GdkLineStyle lineStyle = GDK_LINE_SOLID;
 903     switch (m_pen.GetStyle())
 904     {
 905         case wxUSER_DASH:
 906         {
 907             lineStyle = GDK_LINE_ON_OFF_DASH;
 908             req_nb_dash = m_pen.GetDashCount();
 909             req_dash = m_pen.GetDash();
 910             break;
 911         }
 912         case wxDOT:
 913         {
 914             lineStyle = GDK_LINE_ON_OFF_DASH;
 915             req_nb_dash = 2;
 916             req_dash = dotted;
 917             break;
 918         }
 919         case wxLONG_DASH:
 920         {
 921             lineStyle = GDK_LINE_ON_OFF_DASH;
 922             req_nb_dash = 2;
 923             req_dash = wxCoord_dashed;
 924             break;
 925         }
 926         case wxSHORT_DASH:
 927         {
 928             lineStyle = GDK_LINE_ON_OFF_DASH;
 929             req_nb_dash = 2;
 930             req_dash = short_dashed;
 931             break;
 932         }
 933         case wxDOT_DASH:
 934         {
 935 //            lineStyle = GDK_LINE_DOUBLE_DASH;
 936             lineStyle = GDK_LINE_ON_OFF_DASH;
 937             req_nb_dash = 4;
 938             req_dash = dotted_dashed;
 939             break;
 940         }
 941
 942         case wxTRANSPARENT:
 943         case wxSTIPPLE:
 944         case wxSOLID:
 945         default:
 946         {
 947             lineStyle = GDK_LINE_SOLID;
 948             req_dash = (wxDash*)NULL;
 949             req_nb_dash = 0;
 950             break;
 951         }
 952     }
 953
 954 #if (GTK_MINOR_VERSION > 0)
 955     if (req_dash && req_nb_dash)
 956     {
 957         char *real_req_dash = new char[req_nb_dash];
 958         if (real_req_dash)
 959         {
 960             for (int i = 0; i < req_nb_dash; i++)
 961                 real_req_dash[i] = req_dash[i] * width;
 962             gdk_gc_set_dashes( m_penGC, 0, real_req_dash, req_nb_dash );
 963             delete[] real_req_dash;
 964         }
 965         else
 966         {
 967             // No Memory. We use non-scaled dash pattern...
 968             gdk_gc_set_dashes( m_penGC, 0, (char*)req_dash, req_nb_dash );
 969         }
 970     }
 971 #endif
 972
 973     GdkCapStyle capStyle = GDK_CAP_ROUND;
 974     switch (m_pen.GetCap())
 975     {
 976         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
 977         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
 978         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
 979     }
 980
 981     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
 982     switch (m_pen.GetJoin())
 983     {
 984         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
 985         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
 986         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
 987     }
 988
 989     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
 990
 991     m_pen.GetColour().CalcPixel( m_cmap );
 992     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
 993 }
 994
 995 void wxWindowDC::SetBrush( const wxBrush &brush )
 996 {
 997     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 998
 999     if (m_brush == brush) return;
1000
1001     m_brush = brush;
1002
1003     if (!m_brush.Ok()) return;
1004
1005     if (!m_window) return;
1006
1007     m_brush.GetColour().CalcPixel( m_cmap );
1008     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
1009
1010     gdk_gc_set_fill( m_brushGC, GDK_SOLID );
1011
1012     if ((m_brush.GetStyle() == wxSTIPPLE) && (m_brush.GetStipple()->Ok()))
1013     {
1014         if (m_brush.GetStipple()->GetPixmap())
1015         {
1016             gdk_gc_set_fill( m_brushGC, GDK_TILED );
1017             gdk_gc_set_tile( m_brushGC, m_brush.GetStipple()->GetPixmap() );
1018         }
1019         else
1020         {
1021             gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1022             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetBitmap() );
1023         }
1024     }
1025
1026     if (IS_HATCH(m_brush.GetStyle()))
1027     {
1028         gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1029         int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
1030         gdk_gc_set_stipple( m_brushGC, hatches[num] );
1031     }
1032 }
1033
1034 void wxWindowDC::SetBackground( const wxBrush &brush )
1035 {
1036    /* CMB 21/7/98: Added SetBackground. Sets background brush
1037     * for Clear() and bg colour for shapes filled with cross-hatch brush */
1038
1039     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1040
1041     if (m_backgroundBrush == brush) return;
1042
1043     m_backgroundBrush = brush;
1044
1045     if (!m_backgroundBrush.Ok()) return;
1046
1047     if (!m_window) return;
1048
1049     m_backgroundBrush.GetColour().CalcPixel( m_cmap );
1050     gdk_gc_set_background( m_brushGC, m_backgroundBrush.GetColour().GetColor() );
1051     gdk_gc_set_background( m_penGC, m_backgroundBrush.GetColour().GetColor() );
1052     gdk_gc_set_background( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1053     gdk_gc_set_foreground( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1054
1055     gdk_gc_set_fill( m_bgGC, GDK_SOLID );
1056
1057     if ((m_backgroundBrush.GetStyle() == wxSTIPPLE) && (m_backgroundBrush.GetStipple()->Ok()))
1058     {
1059         if (m_backgroundBrush.GetStipple()->GetPixmap())
1060         {
1061             gdk_gc_set_fill( m_bgGC, GDK_TILED );
1062             gdk_gc_set_tile( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
1063         }
1064         else
1065         {
1066             gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1067             gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetBitmap() );
1068         }
1069     }
1070
1071     if (IS_HATCH(m_backgroundBrush.GetStyle()))
1072     {
1073         gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1074         int num = m_backgroundBrush.GetStyle() - wxBDIAGONAL_HATCH;
1075         gdk_gc_set_stipple( m_bgGC, hatches[num] );
1076     }
1077 }
1078
1079 void wxWindowDC::SetLogicalFunction( int function )
1080 {
1081     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1082
1083     if (m_logicalFunction == function) return;
1084
1085     GdkFunction mode = GDK_COPY;
1086     switch (function)
1087     {
1088         case wxXOR:          mode = GDK_XOR;           break;
1089         case wxINVERT:       mode = GDK_INVERT;        break;
1090 #if (GTK_MINOR_VERSION > 0)
1091         case wxOR_REVERSE:   mode = GDK_OR_REVERSE;    break;
1092         case wxAND_REVERSE:  mode = GDK_AND_REVERSE;   break;
1093         case wxCLEAR:        mode = GDK_CLEAR;         break;
1094         case wxSET:          mode = GDK_SET;           break;
1095         case wxOR_INVERT:    mode = GDK_OR_INVERT;     break;
1096         case wxSRC_AND:
1097         case wxAND:          mode = GDK_AND;           break;
1098         case wxSRC_OR:
1099         case wxOR:           mode = GDK_OR;            break;
1100         case wxEQUIV:        mode = GDK_EQUIV;         break;
1101         case wxNAND:         mode = GDK_NAND;          break;
1102         case wxAND_INVERT:   mode = GDK_AND_INVERT;    break;
1103         case wxCOPY:         mode = GDK_COPY;          break;
1104         case wxNO_OP:        mode = GDK_NOOP;          break;
1105         case wxSRC_INVERT:   mode = GDK_COPY_INVERT;   break;
1106 #endif
1107         default:
1108         {
1109            wxFAIL_MSG( wxT("unsupported logical function") );
1110            break;
1111         }
1112     }
1113
1114     m_logicalFunction = function;
1115
1116     if (!m_window) return;
1117
1118     gdk_gc_set_function( m_penGC, mode );
1119     gdk_gc_set_function( m_brushGC, mode );
1120     gdk_gc_set_function( m_textGC, mode );
1121 }
1122
1123 void wxWindowDC::SetTextForeground( const wxColour &col )
1124 {
1125     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1126
1127     if (m_textForegroundColour == col) return;
1128
1129     m_textForegroundColour = col;
1130     if (!m_textForegroundColour.Ok()) return;
1131
1132     if (!m_window) return;
1133
1134     m_textForegroundColour.CalcPixel( m_cmap );
1135     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
1136 }
1137
1138 void wxWindowDC::SetTextBackground( const wxColour &col )
1139 {
1140     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1141
1142     if (m_textBackgroundColour == col) return;
1143
1144     m_textBackgroundColour = col;
1145     if (!m_textBackgroundColour.Ok()) return;
1146
1147     if (!m_window) return;
1148
1149     m_textBackgroundColour.CalcPixel( m_cmap );
1150     gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
1151 }
1152
1153 void wxWindowDC::SetBackgroundMode( int mode )
1154 {
1155     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1156
1157     m_backgroundMode = mode;
1158
1159     if (!m_window) return;
1160
1161     // CMB 21/7/98: fill style of cross-hatch brushes is affected by
1162     // transparent/solid background mode
1163
1164     if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
1165     {
1166         gdk_gc_set_fill( m_brushGC,
1167           (m_backgroundMode == wxTRANSPARENT) ? GDK_STIPPLED : GDK_OPAQUE_STIPPLED);
1168     }
1169 }
1170
1171 void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
1172 {
1173     wxFAIL_MSG( wxT("wxWindowDC::SetPalette not implemented") );
1174 }
1175
1176 void wxWindowDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
1177 {
1178     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1179
1180     wxDC::DoSetClippingRegion( x, y, width, height );
1181
1182     if (!m_window) return;
1183
1184     GdkRectangle rect;
1185     rect.x = XLOG2DEV(x);
1186     rect.y = YLOG2DEV(y);
1187     rect.width = XLOG2DEVREL(width);
1188     rect.height = YLOG2DEVREL(height);
1189     gdk_gc_set_clip_rectangle( m_penGC, &rect );
1190     gdk_gc_set_clip_rectangle( m_brushGC, &rect );
1191     gdk_gc_set_clip_rectangle( m_textGC, &rect );
1192     gdk_gc_set_clip_rectangle( m_bgGC, &rect );
1193 }
1194
1195 void wxWindowDC::DoSetClippingRegionAsRegion( const wxRegion &region  )
1196 {
1197     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1198
1199     if (region.Empty())
1200     {
1201         DestroyClippingRegion();
1202         return;
1203     }
1204
1205     if (!m_window) return;
1206
1207     gdk_gc_set_clip_region( m_penGC, region.GetRegion() );
1208     gdk_gc_set_clip_region( m_brushGC, region.GetRegion() );
1209     gdk_gc_set_clip_region( m_textGC, region.GetRegion() );
1210     gdk_gc_set_clip_region( m_bgGC, region.GetRegion() );
1211 }
1212
1213 void wxWindowDC::DestroyClippingRegion()
1214 {
1215     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1216
1217     wxDC::DestroyClippingRegion();
1218
1219     if (!m_window) return;
1220
1221     gdk_gc_set_clip_rectangle( m_penGC, (GdkRectangle *) NULL );
1222     gdk_gc_set_clip_rectangle( m_brushGC, (GdkRectangle *) NULL );
1223     gdk_gc_set_clip_rectangle( m_textGC, (GdkRectangle *) NULL );
1224     gdk_gc_set_clip_rectangle( m_bgGC, (GdkRectangle *) NULL );
1225 }
1226
1227 void wxWindowDC::SetUpDC()
1228 {
1229     Destroy();
1230     m_ok = TRUE;
1231     m_logicalFunction = wxCOPY;
1232     m_penGC = gdk_gc_new( m_window );
1233     m_brushGC = gdk_gc_new( m_window );
1234     m_textGC = gdk_gc_new( m_window );
1235     m_bgGC = gdk_gc_new( m_window );
1236
1237     wxColour tmp_col( m_textForegroundColour );
1238     m_textForegroundColour = wxNullColour;
1239     SetTextForeground( tmp_col );
1240     tmp_col = m_textBackgroundColour;
1241     m_textBackgroundColour = wxNullColour;
1242     SetTextBackground( tmp_col );
1243
1244     wxPen tmp_pen( m_pen );
1245     m_pen = wxNullPen;
1246     SetPen( tmp_pen );
1247
1248     wxFont tmp_font( m_font );
1249     m_font = wxNullFont;
1250     SetFont( tmp_font );
1251
1252     wxBrush tmp_brush( m_brush );
1253     m_brush = wxNullBrush;
1254     SetBrush( tmp_brush );
1255
1256 /*
1257     tmp_brush = m_backgroundBrush;
1258     m_backgroundBrush = wxNullBrush;
1259     SetBackground( tmp_brush );
1260 */
1261     tmp_brush = m_backgroundBrush;
1262     m_backgroundBrush = wxNullBrush;
1263     SetBackground( *wxWHITE_BRUSH );
1264     m_backgroundBrush = tmp_brush;
1265
1266     if (!hatch_bitmap)
1267     {
1268         hatch_bitmap    = hatches;
1269         hatch_bitmap[0] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, bdiag_bits, bdiag_width, bdiag_height );
1270         hatch_bitmap[1] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cdiag_bits, cdiag_width, cdiag_height );
1271         hatch_bitmap[2] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, fdiag_bits, fdiag_width, fdiag_height );
1272         hatch_bitmap[3] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cross_bits, cross_width, cross_height );
1273         hatch_bitmap[4] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, horiz_bits, horiz_width, horiz_height );
1274         hatch_bitmap[5] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, verti_bits, verti_width, verti_height );
1275     }
1276 }
1277
1278 void wxWindowDC::Destroy()
1279 {
1280     if (m_penGC) gdk_gc_unref( m_penGC );
1281     m_penGC = (GdkGC*) NULL;
1282     if (m_brushGC) gdk_gc_unref( m_brushGC );
1283     m_brushGC = (GdkGC*) NULL;
1284     if (m_textGC) gdk_gc_unref( m_textGC );
1285     m_textGC = (GdkGC*) NULL;
1286     if (m_bgGC) gdk_gc_unref( m_bgGC );
1287     m_bgGC = (GdkGC*) NULL;
1288 }
1289
1290 void wxWindowDC::ComputeScaleAndOrigin()
1291 {
1292     /* CMB: copy scale to see if it changes */
1293     double origScaleX = m_scaleX;
1294     double origScaleY = m_scaleY;
1295
1296     wxDC::ComputeScaleAndOrigin();
1297
1298     /* CMB: if scale has changed call SetPen to recalulate the line width */
1299     if ((m_scaleX != origScaleX || m_scaleY != origScaleY) &&
1300         (m_pen.Ok()))
1301     {
1302       /* this is a bit artificial, but we need to force wxDC to think
1303          the pen has changed */
1304       wxPen pen = m_pen;
1305       m_pen = wxNullPen;
1306       SetPen( pen );
1307   }
1308 }
1309
1310 // Resolution in pixels per logical inch
1311 wxSize wxWindowDC::GetPPI() const
1312 {
1313     return wxSize(100, 100);
1314 }
1315
1316 int wxWindowDC::GetDepth() const
1317 {
1318     wxFAIL_MSG(wxT("not implemented"));
1319
1320     return -1;
1321 }
1322
1323 #if wxUSE_SPLINES
1324 // ----------------------------------- spline code ----------------------------------------
1325
1326 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1327                          double a3, double b3, double a4, double b4);
1328 void wx_clear_stack();
1329 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1330         double *y3, double *x4, double *y4);
1331 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1332           double x4, double y4);
1333 static bool wx_spline_add_point(double x, double y);
1334 static void wx_spline_draw_point_array(wxDC *dc);
1335
1336 wxList wx_spline_point_list;
1337
1338 #define                half(z1, z2)        ((z1+z2)/2.0)
1339 #define                THRESHOLD        5
1340
1341 /* iterative version */
1342
1343 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1344                  double b4)
1345 {
1346     register double  xmid, ymid;
1347     double           x1, y1, x2, y2, x3, y3, x4, y4;
1348
1349     wx_clear_stack();
1350     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1351
1352     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1353         xmid = (double)half(x2, x3);
1354         ymid = (double)half(y2, y3);
1355         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1356             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1357             wx_spline_add_point( x1, y1 );
1358             wx_spline_add_point( xmid, ymid );
1359         } else {
1360             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1361                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1362             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1363                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1364         }
1365     }
1366 }
1367
1368 /* utilities used by spline drawing routines */
1369
1370 typedef struct wx_spline_stack_struct {
1371     double           x1, y1, x2, y2, x3, y3, x4, y4;
1372 } Stack;
1373
1374 #define         SPLINE_STACK_DEPTH             20
1375 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1376 static Stack   *wx_stack_top;
1377 static int      wx_stack_count;
1378
1379 void wx_clear_stack()
1380 {
1381     wx_stack_top = wx_spline_stack;
1382     wx_stack_count = 0;
1383 }
1384
1385 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1386 {
1387     wx_stack_top->x1 = x1;
1388     wx_stack_top->y1 = y1;
1389     wx_stack_top->x2 = x2;
1390     wx_stack_top->y2 = y2;
1391     wx_stack_top->x3 = x3;
1392     wx_stack_top->y3 = y3;
1393     wx_stack_top->x4 = x4;
1394     wx_stack_top->y4 = y4;
1395     wx_stack_top++;
1396     wx_stack_count++;
1397 }
1398
1399 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1400                   double *x3, double *y3, double *x4, double *y4)
1401 {
1402     if (wx_stack_count == 0)
1403         return (0);
1404     wx_stack_top--;
1405     wx_stack_count--;
1406     *x1 = wx_stack_top->x1;
1407     *y1 = wx_stack_top->y1;
1408     *x2 = wx_stack_top->x2;
1409     *y2 = wx_stack_top->y2;
1410     *x3 = wx_stack_top->x3;
1411     *y3 = wx_stack_top->y3;
1412     *x4 = wx_stack_top->x4;
1413     *y4 = wx_stack_top->y4;
1414     return (1);
1415 }
1416
1417 static bool wx_spline_add_point(double x, double y)
1418 {
1419   wxPoint *point = new wxPoint ;
1420   point->x = (int) x;
1421   point->y = (int) y;
1422   wx_spline_point_list.Append((wxObject*)point);
1423   return TRUE;
1424 }
1425
1426 static void wx_spline_draw_point_array(wxDC *dc)
1427 {
1428   dc->DrawLines(&wx_spline_point_list, 0, 0 );
1429   wxNode *node = wx_spline_point_list.First();
1430   while (node)
1431   {
1432     wxPoint *point = (wxPoint *)node->Data();
1433     delete point;
1434     delete node;
1435     node = wx_spline_point_list.First();
1436   }
1437 }
1438
1439 void wxWindowDC::DoDrawSpline( wxList *points )
1440 {
1441     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1442
1443     wxPoint *p;
1444     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1445     double           x1, y1, x2, y2;
1446
1447     wxNode *node = points->First();
1448     p = (wxPoint *)node->Data();
1449
1450     x1 = p->x;
1451     y1 = p->y;
1452
1453     node = node->Next();
1454     p = (wxPoint *)node->Data();
1455
1456     x2 = p->x;
1457     y2 = p->y;
1458     cx1 = (double)((x1 + x2) / 2);
1459     cy1 = (double)((y1 + y2) / 2);
1460     cx2 = (double)((cx1 + x2) / 2);
1461     cy2 = (double)((cy1 + y2) / 2);
1462
1463     wx_spline_add_point(x1, y1);
1464
1465     while ((node = node->Next()) != NULL)
1466     {
1467         p = (wxPoint *)node->Data();
1468         x1 = x2;
1469         y1 = y2;
1470         x2 = p->x;
1471         y2 = p->y;
1472         cx4 = (double)(x1 + x2) / 2;
1473         cy4 = (double)(y1 + y2) / 2;
1474         cx3 = (double)(x1 + cx4) / 2;
1475         cy3 = (double)(y1 + cy4) / 2;
1476
1477         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1478
1479         cx1 = cx4;
1480         cy1 = cy4;
1481         cx2 = (double)(cx1 + x2) / 2;
1482         cy2 = (double)(cy1 + y2) / 2;
1483     }
1484
1485     wx_spline_add_point( cx1, cy1 );
1486     wx_spline_add_point( x2, y2 );
1487
1488     wx_spline_draw_point_array( this );
1489 }
1490
1491 #endif // wxUSE_SPLINE
1492
1493 //-----------------------------------------------------------------------------
1494 // wxPaintDC
1495 //-----------------------------------------------------------------------------
1496
1497 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC,wxWindowDC)
1498
1499 wxPaintDC::wxPaintDC()
1500   : wxWindowDC()
1501 {
1502 }
1503
1504 wxPaintDC::wxPaintDC( wxWindow *win )
1505   : wxWindowDC( win )
1506 {
1507 }
1508
1509 //-----------------------------------------------------------------------------
1510 // wxClientDC
1511 //-----------------------------------------------------------------------------
1512
1513 IMPLEMENT_DYNAMIC_CLASS(wxClientDC,wxWindowDC)
1514
1515 wxClientDC::wxClientDC()
1516   : wxWindowDC()
1517 {
1518 }
1519
1520 wxClientDC::wxClientDC( wxWindow *win )
1521   : wxWindowDC( win )
1522 {
1523 }
1524