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 const double RAD2DEG  = 180.0 / M_PI;
  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  * compare two doubles and return the larger rounded
  90  * to the nearest int
  91  */
  92 static int roundmax(double a, double b)
  93 {
  94     return (int)((a > b ? a : b) + 0.5);
  95 }
  96
  97 /*
  98  * compare two doubles and return the smaller rounded
  99  * to the nearest int
 100  */
 101 static int roundmin(double a, double b)
 102 {
 103     return (int)((a < b ? a : b) - 0.5);
 104 }
 105
 106
 107 //-----------------------------------------------------------------------------
 108 // wxWindowDC
 109 //-----------------------------------------------------------------------------
 110
 111 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
 112
 113 wxWindowDC::wxWindowDC()
 114 {
 115     m_penGC = (GdkGC *) NULL;
 116     m_brushGC = (GdkGC *) NULL;
 117     m_textGC = (GdkGC *) NULL;
 118     m_bgGC = (GdkGC *) NULL;
 119     m_cmap = (GdkColormap *) NULL;
 120     m_isMemDC = FALSE;
 121     m_owner = (wxWindow *)NULL;
 122 }
 123
 124 wxWindowDC::wxWindowDC( wxWindow *window )
 125 {
 126     m_penGC = (GdkGC *) NULL;
 127     m_brushGC = (GdkGC *) NULL;
 128     m_textGC = (GdkGC *) NULL;
 129     m_bgGC = (GdkGC *) NULL;
 130     m_cmap = (GdkColormap *) NULL;
 131     m_owner = (wxWindow *)NULL;
 132     m_isMemDC = FALSE;
 133     m_font = window->GetFont();
 134
 135     wxASSERT_MSG( window, wxT("DC needs a window") );
 136
 137     GtkWidget *widget = window->m_wxwindow;
 138
 139     wxASSERT_MSG( widget, wxT("DC needs a widget") );
 140
 141     GtkPizza *pizza = GTK_PIZZA( widget );
 142     m_window = pizza->bin_window;
 143
 144     /* not realized ? */
 145     if (!m_window)
 146     {
 147          /* don't report problems */
 148          m_ok = TRUE;
 149
 150          return;
 151     }
 152
 153     if (window->m_wxwindow)
 154         m_cmap = gtk_widget_get_colormap( window->m_wxwindow );
 155     else
 156         m_cmap = gtk_widget_get_colormap( window->m_widget );
 157
 158     SetUpDC();
 159
 160     /* this must be done after SetUpDC, bacause SetUpDC calls the
 161        repective SetBrush, SetPen, SetBackground etc functions
 162        to set up the DC. SetBackground call m_owner->SetBackground
 163        and this might not be desired as the standard dc background
 164        is white whereas a window might assume gray to be the
 165        standard (as e.g. wxStatusBar) */
 166
 167     m_owner = window;
 168 }
 169
 170 wxWindowDC::~wxWindowDC()
 171 {
 172     Destroy();
 173 }
 174
 175 void wxWindowDC::DoFloodFill( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 176                            const wxColour &WXUNUSED(col), int WXUNUSED(style) )
 177 {
 178     wxFAIL_MSG( wxT("wxWindowDC::DoFloodFill not implemented") );
 179 }
 180
 181 bool wxWindowDC::DoGetPixel( wxCoord WXUNUSED(x1), wxCoord WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
 182 {
 183     wxFAIL_MSG( wxT("wxWindowDC::DoGetPixel not implemented") );
 184     return FALSE;
 185 }
 186
 187 void wxWindowDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 188 {
 189     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 190
 191     if (m_pen.GetStyle() != wxTRANSPARENT)
 192     {
 193         if (m_window)
 194             gdk_draw_line( m_window, m_penGC, XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2) );
 195
 196         CalcBoundingBox(x1, y1);
 197         CalcBoundingBox(x2, y2);
 198     }
 199 }
 200
 201 void wxWindowDC::DoCrossHair( wxCoord x, wxCoord y )
 202 {
 203     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 204
 205     if (m_pen.GetStyle() != wxTRANSPARENT)
 206     {
 207         int w = 0;
 208         int h = 0;
 209         GetSize( &w, &h );
 210         wxCoord xx = XLOG2DEV(x);
 211         wxCoord yy = YLOG2DEV(y);
 212         if (m_window)
 213         {
 214             gdk_draw_line( m_window, m_penGC, 0, yy, XLOG2DEVREL(w), yy );
 215             gdk_draw_line( m_window, m_penGC, xx, 0, xx, YLOG2DEVREL(h) );
 216         }
 217     }
 218 }
 219
 220 void wxWindowDC::DoDrawArc( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2,
 221                             wxCoord xc, wxCoord yc )
 222 {
 223     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 224
 225     wxCoord xx1 = XLOG2DEV(x1);
 226     wxCoord yy1 = YLOG2DEV(y1);
 227     wxCoord xx2 = XLOG2DEV(x2);
 228     wxCoord yy2 = YLOG2DEV(y2);
 229     wxCoord xxc = XLOG2DEV(xc);
 230     wxCoord yyc = YLOG2DEV(yc);
 231     double dx = xx1 - xxc;
 232     double dy = yy1 - yyc;
 233     double radius = sqrt((double)(dx*dx+dy*dy));
 234     wxCoord   r      = (wxCoord)radius;
 235     double radius1, radius2;
 236
 237     if (xx1 == xx2 && yy1 == yy2)
 238     {
 239         radius1 = 0.0;
 240         radius2 = 360.0;
 241     }
 242     else
 243     if (radius == 0.0)
 244     {
 245         radius1 = radius2 = 0.0;
 246     }
 247     else
 248     {
 249         radius1 = (xx1 - xxc == 0) ?
 250             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 251             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 252         radius2 = (xx2 - xxc == 0) ?
 253             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 254             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 255     }
 256     wxCoord alpha1 = wxCoord(radius1 * 64.0);
 257     wxCoord alpha2 = wxCoord((radius2 - radius1) * 64.0);
 258     while (alpha2 <= 0) alpha2 += 360*64;
 259     while (alpha1 > 360*64) alpha1 -= 360*64;
 260
 261     if (m_window)
 262     {
 263         if (m_brush.GetStyle() != wxTRANSPARENT)
 264             gdk_draw_arc( m_window, m_brushGC, TRUE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 265
 266         if (m_pen.GetStyle() != wxTRANSPARENT)
 267             gdk_draw_arc( m_window, m_penGC, FALSE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 268     }
 269
 270     CalcBoundingBox (x1, y1);
 271     CalcBoundingBox (x2, y2);
 272 }
 273
 274 void wxWindowDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double sa, double ea )
 275 {
 276     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 277
 278     wxCoord xx = XLOG2DEV(x);
 279     wxCoord yy = YLOG2DEV(y);
 280     wxCoord ww = m_signX * XLOG2DEVREL(width);
 281     wxCoord hh = m_signY * YLOG2DEVREL(height);
 282
 283     // CMB: handle -ve width and/or height
 284     if (ww < 0) { ww = -ww; xx = xx - ww; }
 285     if (hh < 0) { hh = -hh; yy = yy - hh; }
 286
 287     if (m_window)
 288     {
 289         wxCoord start = wxCoord(sa * 64.0);
 290         wxCoord end = wxCoord(ea * 64.0);
 291
 292         if (m_brush.GetStyle() != wxTRANSPARENT)
 293             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, start, end );
 294
 295         if (m_pen.GetStyle() != wxTRANSPARENT)
 296             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, start, end );
 297     }
 298
 299     CalcBoundingBox (x, y);
 300     CalcBoundingBox (x + width, y + height);
 301 }
 302
 303 void wxWindowDC::DoDrawPoint( wxCoord x, wxCoord y )
 304 {
 305     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 306
 307     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 308         gdk_draw_point( m_window, m_penGC, XLOG2DEV(x), YLOG2DEV(y) );
 309
 310     CalcBoundingBox (x, y);
 311 }
 312
 313 void wxWindowDC::DoDrawLines( int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset )
 314 {
 315     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 316
 317     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 318     if (n <= 0) return;
 319
 320     CalcBoundingBox( points[0].x + xoffset, points[0].y + yoffset );
 321
 322     for (int i = 0; i < n-1; i++)
 323     {
 324         wxCoord x1 = XLOG2DEV(points[i].x + xoffset);
 325         wxCoord x2 = XLOG2DEV(points[i+1].x + xoffset);
 326         wxCoord y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 327         wxCoord y2 = YLOG2DEV(points[i+1].y + yoffset);
 328
 329         if (m_window)
 330             gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 331
 332         CalcBoundingBox( points[i+1].x + xoffset, points[i+1].y + yoffset );
 333     }
 334 }
 335
 336 void wxWindowDC::DoDrawPolygon( int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset, int WXUNUSED(fillStyle) )
 337 {
 338     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 339
 340     if (n <= 0) return;
 341
 342     GdkPoint *gdkpoints = new GdkPoint[n+1];
 343     int i;
 344     for (i = 0 ; i < n ; i++)
 345     {
 346         gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
 347         gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
 348
 349         CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset );
 350     }
 351
 352     if ((m_brush.GetStyle() != wxTRANSPARENT) && m_window)
 353         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 354
 355     // To do: Fillstyle
 356
 357     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 358     {
 359         for (i = 0 ; i < n ; i++)
 360         {
 361             gdk_draw_line( m_window, m_penGC,
 362                            gdkpoints[i%n].x,
 363                            gdkpoints[i%n].y,
 364                            gdkpoints[(i+1)%n].x,
 365                            gdkpoints[(i+1)%n].y);
 366         }
 367     }
 368
 369     delete[] gdkpoints;
 370 }
 371
 372 void wxWindowDC::DoDrawRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 373 {
 374     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 375
 376     wxCoord xx = XLOG2DEV(x);
 377     wxCoord yy = YLOG2DEV(y);
 378     wxCoord ww = m_signX * XLOG2DEVREL(width);
 379     wxCoord hh = m_signY * YLOG2DEVREL(height);
 380
 381     // CMB: draw nothing if transformed w or h is 0
 382     if (ww == 0 || hh == 0) return;
 383
 384     // CMB: handle -ve width and/or height
 385     if (ww < 0) { ww = -ww; xx = xx - ww; }
 386     if (hh < 0) { hh = -hh; yy = yy - hh; }
 387
 388     if (m_window)
 389     {
 390         if (m_brush.GetStyle() != wxTRANSPARENT)
 391             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 392
 393         if (m_pen.GetStyle() != wxTRANSPARENT)
 394             gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 395     }
 396
 397     CalcBoundingBox( x, y );
 398     CalcBoundingBox( x + width, y + height );
 399 }
 400
 401 void wxWindowDC::DoDrawRoundedRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
 402 {
 403     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 404
 405     if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 406
 407     wxCoord xx = XLOG2DEV(x);
 408     wxCoord yy = YLOG2DEV(y);
 409     wxCoord ww = m_signX * XLOG2DEVREL(width);
 410     wxCoord hh = m_signY * YLOG2DEVREL(height);
 411     wxCoord rr = XLOG2DEVREL((wxCoord)radius);
 412
 413     // CMB: handle -ve width and/or height
 414     if (ww < 0) { ww = -ww; xx = xx - ww; }
 415     if (hh < 0) { hh = -hh; yy = yy - hh; }
 416
 417     // CMB: if radius is zero use DrawRectangle() instead to avoid
 418     // X drawing errors with small radii
 419     if (rr == 0)
 420     {
 421         DrawRectangle( x, y, width, height );
 422         return;
 423     }
 424
 425     // CMB: draw nothing if transformed w or h is 0
 426     if (ww == 0 || hh == 0) return;
 427
 428     // CMB: adjust size if outline is drawn otherwise the result is
 429     // 1 pixel too wide and high
 430     if (m_pen.GetStyle() != wxTRANSPARENT)
 431     {
 432         ww--;
 433         hh--;
 434     }
 435
 436     if (m_window)
 437     {
 438         // CMB: ensure dd is not larger than rectangle otherwise we
 439         // get an hour glass shape
 440         wxCoord dd = 2 * rr;
 441         if (dd > ww) dd = ww;
 442         if (dd > hh) dd = hh;
 443         rr = dd / 2;
 444
 445         if (m_brush.GetStyle() != wxTRANSPARENT)
 446         {
 447             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 448             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 449             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 450             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 451             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 452             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 453         }
 454
 455         if (m_pen.GetStyle() != wxTRANSPARENT)
 456         {
 457             gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 458             gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 459             gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 460             gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 461             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 462             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 463             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 464             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 465         }
 466     }
 467
 468     // this ignores the radius
 469     CalcBoundingBox( x, y );
 470     CalcBoundingBox( x + width, y + height );
 471 }
 472
 473 void wxWindowDC::DoDrawEllipse( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 474 {
 475     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 476
 477     wxCoord xx = XLOG2DEV(x);
 478     wxCoord yy = YLOG2DEV(y);
 479     wxCoord ww = m_signX * XLOG2DEVREL(width);
 480     wxCoord hh = m_signY * YLOG2DEVREL(height);
 481
 482     // CMB: handle -ve width and/or height
 483     if (ww < 0) { ww = -ww; xx = xx - ww; }
 484     if (hh < 0) { hh = -hh; yy = yy - hh; }
 485
 486     if (m_window)
 487     {
 488         if (m_brush.GetStyle() != wxTRANSPARENT)
 489             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 490
 491         if (m_pen.GetStyle() != wxTRANSPARENT)
 492             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 493     }
 494
 495     CalcBoundingBox( x - width, y - height );
 496     CalcBoundingBox( x + width, y + height );
 497 }
 498
 499 void wxWindowDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
 500 {
 501     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 502     DoDrawBitmap( (const wxBitmap&)icon, x, y, (bool)TRUE );
 503 }
 504
 505 void wxWindowDC::DoDrawBitmap( const wxBitmap &bitmap,
 506                                wxCoord x, wxCoord y,
 507                                bool useMask )
 508 {
 509     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 510
 511     wxCHECK_RET( bitmap.Ok(), wxT("invalid bitmap") );
 512
 513     /* scale/translate size and position */
 514
 515     int xx = XLOG2DEV(x);
 516     int yy = YLOG2DEV(y);
 517
 518     int w = bitmap.GetWidth();
 519     int h = bitmap.GetHeight();
 520
 521     CalcBoundingBox( x, y );
 522     CalcBoundingBox( x + w, y + h );
 523
 524     if (!m_window) return;
 525
 526     int ww = XLOG2DEVREL(w);
 527     int hh = YLOG2DEVREL(h);
 528
 529     /* scale bitmap if required */
 530
 531     wxBitmap use_bitmap;
 532
 533     if ((w != ww) || (h != hh))
 534     {
 535         wxImage image( bitmap );
 536         image = image.Scale( ww, hh );
 537
 538         use_bitmap = image.ConvertToBitmap();
 539     }
 540     else
 541     {
 542         use_bitmap = bitmap;
 543     }
 544
 545     /* apply mask if any */
 546
 547     GdkBitmap *mask = (GdkBitmap *) NULL;
 548     if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 549
 550     if (useMask && mask)
 551     {
 552         gdk_gc_set_clip_mask( m_penGC, mask );
 553         gdk_gc_set_clip_origin( m_penGC, xx, yy );
 554     }
 555
 556     /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 557
 558     GdkPixmap *pm = use_bitmap.GetPixmap();
 559     if (pm)
 560     {
 561         gdk_draw_pixmap( m_window, m_penGC, pm, 0, 0, xx, yy, -1, -1 );
 562     }
 563     else
 564     {
 565         GdkBitmap *bm = use_bitmap.GetBitmap();
 566         if (bm)
 567         {
 568             gdk_draw_bitmap( m_window, m_penGC, bm, 0, 0, xx, yy, -1, -1 );
 569         }
 570     }
 571
 572     /* remove mask again if any */
 573
 574     if (useMask && mask)
 575     {
 576         gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 577         gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 578     }
 579 }
 580
 581 bool wxWindowDC::DoBlit( wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 582                          wxDC *source, wxCoord xsrc, wxCoord ysrc,
 583                          int logical_func, bool useMask )
 584 {
 585    /* this is the nth try to get this utterly useless function to
 586       work. it now completely ignores the scaling or translation
 587       of the source dc, but scales correctly on the target dc and
 588       knows about possible mask information in a memory dc. */
 589
 590     wxCHECK_MSG( Ok(), FALSE, wxT("invalid window dc") );
 591
 592     wxCHECK_MSG( source, FALSE, wxT("invalid source dc") );
 593
 594     if (!m_window) return FALSE;
 595
 596     wxClientDC *srcDC = (wxClientDC*)source;
 597     wxMemoryDC *memDC = (wxMemoryDC*)source;
 598
 599     bool use_bitmap_method = FALSE;
 600
 601     if (srcDC->m_isMemDC)
 602     {
 603         if (!memDC->m_selected.Ok()) return FALSE;
 604
 605         /* we use the "XCopyArea" way to copy a memory dc into
 606            y different window if the memory dc BOTH
 607            a) doesn't have any mask or its mask isn't used
 608            b) it is clipped
 609            c) is not 1-bit */
 610
 611         if (useMask && (memDC->m_selected.GetMask()))
 612         {
 613            /* we HAVE TO use the direct way for memory dcs
 614               that have mask since the XCopyArea doesn't know
 615               about masks */
 616             use_bitmap_method = TRUE;
 617         }
 618         else if (memDC->m_selected.GetDepth() == 1)
 619         {
 620            /* we HAVE TO use the direct way for memory dcs
 621               that are bitmaps because XCopyArea doesn't cope
 622               with different bit depths */
 623             use_bitmap_method = TRUE;
 624         }
 625         else if ((xsrc == 0) && (ysrc == 0) &&
 626                  (width == memDC->m_selected.GetWidth()) &&
 627                  (height == memDC->m_selected.GetHeight()))
 628         {
 629            /* we SHOULD use the direct way if all of the bitmap
 630               in the memory dc is copied in which case XCopyArea
 631               wouldn't be able able to boost performace by reducing
 632               the area to be scaled */
 633             use_bitmap_method = TRUE;
 634         }
 635         else
 636         {
 637             use_bitmap_method = FALSE;
 638         }
 639     }
 640
 641     CalcBoundingBox( xdest, ydest );
 642     CalcBoundingBox( xdest + width, ydest + height );
 643
 644     int old_logical_func = m_logicalFunction;
 645     SetLogicalFunction( logical_func );
 646
 647     if (use_bitmap_method)
 648     {
 649         /* scale/translate bitmap size */
 650
 651         wxCoord bm_width = memDC->m_selected.GetWidth();
 652         wxCoord bm_height = memDC->m_selected.GetHeight();
 653
 654         wxCoord bm_ww = XLOG2DEVREL( bm_width );
 655         wxCoord bm_hh = YLOG2DEVREL( bm_height );
 656
 657         /* scale bitmap if required */
 658
 659         wxBitmap use_bitmap;
 660
 661         if ((bm_width != bm_ww) || (bm_height != bm_hh))
 662         {
 663             wxImage image( memDC->m_selected );
 664             image = image.Scale( bm_ww, bm_hh );
 665
 666             use_bitmap = image.ConvertToBitmap();
 667         }
 668         else
 669         {
 670             use_bitmap = memDC->m_selected;
 671         }
 672
 673         /* scale/translate size and position */
 674
 675         wxCoord xx = XLOG2DEV(xdest);
 676         wxCoord yy = YLOG2DEV(ydest);
 677
 678         wxCoord ww = XLOG2DEVREL(width);
 679         wxCoord hh = YLOG2DEVREL(height);
 680
 681         /* apply mask if any */
 682
 683         GdkBitmap *mask = (GdkBitmap *) NULL;
 684         if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 685
 686         if (useMask && mask)
 687         {
 688             gdk_gc_set_clip_mask( m_penGC, mask );
 689             gdk_gc_set_clip_origin( m_penGC, xx, yy );
 690         }
 691
 692         /* draw XPixmap or XBitmap, depending on what the wxBitmap contains */
 693
 694         GdkPixmap *pm = use_bitmap.GetPixmap();
 695         if (pm)
 696         {
 697             gdk_draw_pixmap( m_window, m_penGC, pm, xsrc, ysrc, xx, yy, ww, hh );
 698         }
 699         else
 700         {
 701             GdkBitmap *bm = use_bitmap.GetBitmap();
 702             if (bm)
 703             {
 704                 /* we use the textGC here because blitting a bitmap is done
 705                    using the current text colour */
 706                 gdk_draw_bitmap( m_window, m_textGC, bm, xsrc, ysrc, xx, yy, ww, hh );
 707             }
 708         }
 709
 710         /* remove mask again if any */
 711
 712         if (useMask && mask)
 713         {
 714             gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 715             gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 716         }
 717     }
 718     else /* use_bitmap_method */
 719     {
 720         /* scale/translate size and position */
 721
 722         wxCoord xx = XLOG2DEV(xdest);
 723         wxCoord yy = YLOG2DEV(ydest);
 724
 725         wxCoord ww = XLOG2DEVREL(width);
 726         wxCoord hh = YLOG2DEVREL(height);
 727
 728         if ((width != ww) || (height != hh))
 729         {
 730             /* draw source window into a bitmap as we cannot scale
 731                a window in contrast to a bitmap. this would actually
 732                work with memory dcs as well, but we'd lose the mask
 733                information and waste one step in this process since
 734                a memory already has a bitmap. all this is slightly
 735                inefficient as we could take an XImage directly from
 736                an X window, but we'd then also have to care that
 737                the window is not outside the screen (in which case
 738                we'd get a BadMatch or what not).
 739                Is a double XGetImage and combined XGetPixel and
 740                XPutPixel really faster? I'm not sure. look at wxXt
 741                for a different implementation of the same problem. */
 742
 743             wxBitmap bitmap( width, height );
 744             gdk_window_copy_area( bitmap.GetPixmap(), m_penGC, 0, 0,
 745                                   srcDC->GetWindow(),
 746                                   xsrc, ysrc, width, height );
 747
 748             /* scale image */
 749
 750             wxImage image( bitmap );
 751             image = image.Scale( ww, hh );
 752
 753             /* convert to bitmap */
 754
 755             bitmap = image.ConvertToBitmap();
 756
 757             /* draw scaled bitmap */
 758
 759             gdk_draw_pixmap( m_window, m_penGC, bitmap.GetPixmap(), 0, 0, xx, yy, -1, -1 );
 760
 761         }
 762         else
 763         {
 764             /* no scaling and not a memory dc with a mask either */
 765
 766             gdk_window_copy_area( m_window, m_penGC, xx, yy,
 767                                   srcDC->GetWindow(),
 768                                   xsrc, ysrc, width, height );
 769         }
 770     }
 771
 772     SetLogicalFunction( old_logical_func );
 773     return TRUE;
 774 }
 775
 776 void wxWindowDC::DoDrawText( const wxString &text, wxCoord x, wxCoord y )
 777 {
 778     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 779
 780     if (!m_window) return;
 781
 782     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 783
 784     wxCHECK_RET( font, wxT("invalid font") );
 785
 786     x = XLOG2DEV(x);
 787     y = YLOG2DEV(y);
 788
 789     /* CMB 21/5/98: draw text background if mode is wxSOLID */
 790     if (m_backgroundMode == wxSOLID)
 791     {
 792         wxCoord width = gdk_string_width( font, text.mbc_str() );
 793         wxCoord height = font->ascent + font->descent;
 794         gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 795         gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 796         gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 797     }
 798     gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text.mbc_str() );
 799
 800     /* CMB 17/7/98: simple underline: ignores scaling and underlying
 801        X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 802        properties (see wxXt implementation) */
 803     if (m_font.GetUnderlined())
 804     {
 805         long width = gdk_string_width( font, text.mbc_str() );
 806         long ul_y = y + font->ascent;
 807         if (font->descent > 0) ul_y++;
 808         gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 809     }
 810
 811     long w, h;
 812     GetTextExtent (text, &w, &h);
 813     CalcBoundingBox (x + w, y + h);
 814     CalcBoundingBox (x, y);
 815 }
 816
 817 void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y, double angle )
 818 {
 819     if (angle == 0.0)
 820     {
 821         DrawText(text, x, y);
 822         return;
 823     }
 824
 825     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 826
 827     if (!m_window) return;
 828
 829     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 830
 831     wxCHECK_RET( font, wxT("invalid font") );
 832
 833     x = XLOG2DEV(x);
 834     y = YLOG2DEV(y);
 835
 836     int cx = gdk_string_width( font, text.mbc_str() );
 837     int cy = font->ascent + font->descent;
 838
 839     wxBitmap src(cx, cy);
 840     wxMemoryDC dc;
 841     dc.SelectObject(src);
 842     dc.SetFont(GetFont());
 843     dc.SetBackground(*wxWHITE_BRUSH);
 844     dc.SetBrush(*wxBLACK_BRUSH);
 845     dc.Clear();
 846     dc.DrawText(text, 0, 0);
 847     dc.SetFont(wxNullFont);
 848
 849     // Calculate the size of the rotated bounding box.
 850     double dx = cos(angle / 180.0 * M_PI);
 851     double dy = sin(angle / 180.0 * M_PI);
 852     double x4 = -cy * dy;
 853     double y4 = cy * dx;
 854     double x3 = cx * dx;
 855     double y3 = cx * dy;
 856     double x2 = x3 + x4;
 857     double y2 = y3 + y4;
 858     double x1 = x;
 859     double y1 = y;
 860
 861     // Create image from the source bitmap after writing the text into it.
 862     wxImage  image(src);
 863
 864     int minx = roundmin(0, roundmin(x4, roundmin(x2, x3)));
 865     int miny = roundmin(0, roundmin(y4, roundmin(y2, y3)));
 866     int maxx = roundmax(0, roundmax(x4, roundmax(x2, x3)));
 867     int maxy = roundmax(0, roundmax(y4, roundmax(y2, y3)));
 868
 869     // This rotates counterclockwise around the top left corner.
 870     for (int rx = minx; rx < maxx; rx++)
 871     {
 872         for (int ry = miny; ry < maxy; ry++)
 873         {
 874             // transform dest coords to source coords
 875             int sx = (int) (rx * dx + ry * dy + 0.5);
 876             int sy = (int) (ry * dx - rx * dy + 0.5);
 877             if (sx >= 0 && sx < cx && sy >= 0 && sy < cy)
 878             {
 879                 // draw black pixels, ignore white ones (i.e. transparent b/g)
 880                 if (image.GetRed(sx, sy) == 0)
 881                 {
 882                     DrawPoint(x1 + maxx - rx, cy + y1 - ry);
 883                 }
 884                 else
 885                 {
 886                     // Background
 887                     //DrawPoint(x1 + maxx - rx, cy + y1 + maxy - ry);
 888                 }
 889             }
 890         }
 891     }
 892
 893     // TODO call CalcBoundingBox()
 894 }
 895
 896 void wxWindowDC::DoGetTextExtent(const wxString &string,
 897                                  wxCoord *width, wxCoord *height,
 898                                  wxCoord *descent, wxCoord *externalLeading,
 899                                  wxFont *theFont) const
 900 {
 901     wxFont fontToUse = m_font;
 902     if (theFont) fontToUse = *theFont;
 903
 904     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 905     if (width) (*width) = wxCoord(gdk_string_width( font, string.mbc_str() ) / m_scaleX);
 906     if (height) (*height) = wxCoord((font->ascent + font->descent) / m_scaleY);
 907     if (descent) (*descent) = wxCoord(font->descent / m_scaleY);
 908     if (externalLeading) (*externalLeading) = 0;  // ??
 909 }
 910
 911 wxCoord wxWindowDC::GetCharWidth() const
 912 {
 913     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 914     wxCHECK_MSG( font, -1, wxT("invalid font") );
 915
 916     return wxCoord(gdk_string_width( font, "H" ) / m_scaleX);
 917 }
 918
 919 wxCoord wxWindowDC::GetCharHeight() const
 920 {
 921     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 922     wxCHECK_MSG( font, -1, wxT("invalid font") );
 923
 924     return wxCoord((font->ascent + font->descent) / m_scaleY);
 925 }
 926
 927 void wxWindowDC::Clear()
 928 {
 929     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 930
 931     if (!m_window) return;
 932
 933     /* - we either are a memory dc or have a window as the
 934        owner. anything else shouldn't happen.
 935        - we don't use gdk_window_clear() as we don't set
 936        the window's background colour anymore. it is too
 937        much pain to keep the DC's and the window's back-
 938        ground colour in synch. */
 939
 940     if (m_owner)
 941     {
 942         int width,height;
 943         m_owner->GetSize( &width, &height );
 944         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 945         return;
 946     }
 947
 948     if (m_isMemDC)
 949     {
 950         int width,height;
 951         GetSize( &width, &height );
 952         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 953         return;
 954     }
 955 }
 956
 957 void wxWindowDC::SetFont( const wxFont &font )
 958 {
 959     m_font = font;
 960 }
 961
 962 void wxWindowDC::SetPen( const wxPen &pen )
 963 {
 964     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 965
 966     if (m_pen == pen) return;
 967
 968     m_pen = pen;
 969
 970     if (!m_pen.Ok()) return;
 971
 972     if (!m_window) return;
 973
 974     gint width = m_pen.GetWidth();
 975     if (width <= 0)
 976     {
 977         // CMB: if width is non-zero scale it with the dc
 978         width = 1;
 979     }
 980     else
 981     {
 982         // X doesn't allow different width in x and y and so we take
 983         // the average
 984         double w = 0.5 +
 985                    ( fabs((double) XLOG2DEVREL(width)) +
 986                      fabs((double) YLOG2DEVREL(width)) ) / 2.0;
 987         width = (int)w;
 988     }
 989
 990     static const char dotted[] = {1, 1};
 991     static const char short_dashed[] = {2, 2};
 992     static const char wxCoord_dashed[] = {2, 4};
 993     static const char dotted_dashed[] = {3, 3, 1, 3};
 994
 995     // We express dash pattern in pen width unit, so we are
 996     // independent of zoom factor and so on...
 997     int req_nb_dash;
 998     const char *req_dash;
 999
1000     GdkLineStyle lineStyle = GDK_LINE_SOLID;
1001     switch (m_pen.GetStyle())
1002     {
1003         case wxUSER_DASH:
1004         {
1005             lineStyle = GDK_LINE_ON_OFF_DASH;
1006             req_nb_dash = m_pen.GetDashCount();
1007             req_dash = m_pen.GetDash();
1008             break;
1009         }
1010         case wxDOT:
1011         {
1012             lineStyle = GDK_LINE_ON_OFF_DASH;
1013             req_nb_dash = 2;
1014             req_dash = dotted;
1015             break;
1016         }
1017         case wxLONG_DASH:
1018         {
1019             lineStyle = GDK_LINE_ON_OFF_DASH;
1020             req_nb_dash = 2;
1021             req_dash = wxCoord_dashed;
1022             break;
1023         }
1024         case wxSHORT_DASH:
1025         {
1026             lineStyle = GDK_LINE_ON_OFF_DASH;
1027             req_nb_dash = 2;
1028             req_dash = short_dashed;
1029             break;
1030         }
1031         case wxDOT_DASH:
1032         {
1033 //            lineStyle = GDK_LINE_DOUBLE_DASH;
1034             lineStyle = GDK_LINE_ON_OFF_DASH;
1035             req_nb_dash = 4;
1036             req_dash = dotted_dashed;
1037             break;
1038         }
1039
1040         case wxTRANSPARENT:
1041         case wxSTIPPLE:
1042         case wxSOLID:
1043         default:
1044         {
1045             lineStyle = GDK_LINE_SOLID;
1046             req_dash = (wxDash*)NULL;
1047             req_nb_dash = 0;
1048             break;
1049         }
1050     }
1051
1052 #if (GTK_MINOR_VERSION > 0)
1053     if (req_dash && req_nb_dash)
1054     {
1055         char *real_req_dash = new char[req_nb_dash];
1056         if (real_req_dash)
1057         {
1058             for (int i = 0; i < req_nb_dash; i++)
1059                 real_req_dash[i] = req_dash[i] * width;
1060             gdk_gc_set_dashes( m_penGC, 0, real_req_dash, req_nb_dash );
1061             delete[] real_req_dash;
1062         }
1063         else
1064         {
1065             // No Memory. We use non-scaled dash pattern...
1066             gdk_gc_set_dashes( m_penGC, 0, (char*)req_dash, req_nb_dash );
1067         }
1068     }
1069 #endif
1070
1071     GdkCapStyle capStyle = GDK_CAP_ROUND;
1072     switch (m_pen.GetCap())
1073     {
1074         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
1075         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
1076         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
1077     }
1078
1079     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
1080     switch (m_pen.GetJoin())
1081     {
1082         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
1083         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
1084         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
1085     }
1086
1087     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
1088
1089     m_pen.GetColour().CalcPixel( m_cmap );
1090     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
1091 }
1092
1093 void wxWindowDC::SetBrush( const wxBrush &brush )
1094 {
1095     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1096
1097     if (m_brush == brush) return;
1098
1099     m_brush = brush;
1100
1101     if (!m_brush.Ok()) return;
1102
1103     if (!m_window) return;
1104
1105     m_brush.GetColour().CalcPixel( m_cmap );
1106     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
1107
1108     gdk_gc_set_fill( m_brushGC, GDK_SOLID );
1109
1110     if ((m_brush.GetStyle() == wxSTIPPLE) && (m_brush.GetStipple()->Ok()))
1111     {
1112         if (m_brush.GetStipple()->GetPixmap())
1113         {
1114             gdk_gc_set_fill( m_brushGC, GDK_TILED );
1115             gdk_gc_set_tile( m_brushGC, m_brush.GetStipple()->GetPixmap() );
1116         }
1117         else
1118         {
1119             gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1120             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetBitmap() );
1121         }
1122     }
1123
1124     if (IS_HATCH(m_brush.GetStyle()))
1125     {
1126         gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1127         int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
1128         gdk_gc_set_stipple( m_brushGC, hatches[num] );
1129     }
1130 }
1131
1132 void wxWindowDC::SetBackground( const wxBrush &brush )
1133 {
1134    /* CMB 21/7/98: Added SetBackground. Sets background brush
1135     * for Clear() and bg colour for shapes filled with cross-hatch brush */
1136
1137     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1138
1139     if (m_backgroundBrush == brush) return;
1140
1141     m_backgroundBrush = brush;
1142
1143     if (!m_backgroundBrush.Ok()) return;
1144
1145     if (!m_window) return;
1146
1147     m_backgroundBrush.GetColour().CalcPixel( m_cmap );
1148     gdk_gc_set_background( m_brushGC, m_backgroundBrush.GetColour().GetColor() );
1149     gdk_gc_set_background( m_penGC, m_backgroundBrush.GetColour().GetColor() );
1150     gdk_gc_set_background( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1151     gdk_gc_set_foreground( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1152
1153     gdk_gc_set_fill( m_bgGC, GDK_SOLID );
1154
1155     if ((m_backgroundBrush.GetStyle() == wxSTIPPLE) && (m_backgroundBrush.GetStipple()->Ok()))
1156     {
1157         if (m_backgroundBrush.GetStipple()->GetPixmap())
1158         {
1159             gdk_gc_set_fill( m_bgGC, GDK_TILED );
1160             gdk_gc_set_tile( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
1161         }
1162         else
1163         {
1164             gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1165             gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetBitmap() );
1166         }
1167     }
1168
1169     if (IS_HATCH(m_backgroundBrush.GetStyle()))
1170     {
1171         gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1172         int num = m_backgroundBrush.GetStyle() - wxBDIAGONAL_HATCH;
1173         gdk_gc_set_stipple( m_bgGC, hatches[num] );
1174     }
1175 }
1176
1177 void wxWindowDC::SetLogicalFunction( int function )
1178 {
1179     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1180
1181     if (m_logicalFunction == function) return;
1182
1183     GdkFunction mode = GDK_COPY;
1184     switch (function)
1185     {
1186         case wxXOR:          mode = GDK_XOR;           break;
1187         case wxINVERT:       mode = GDK_INVERT;        break;
1188 #if (GTK_MINOR_VERSION > 0)
1189         case wxOR_REVERSE:   mode = GDK_OR_REVERSE;    break;
1190         case wxAND_REVERSE:  mode = GDK_AND_REVERSE;   break;
1191         case wxCLEAR:        mode = GDK_CLEAR;         break;
1192         case wxSET:          mode = GDK_SET;           break;
1193         case wxOR_INVERT:    mode = GDK_OR_INVERT;     break;
1194         case wxSRC_AND:
1195         case wxAND:          mode = GDK_AND;           break;
1196         case wxSRC_OR:
1197         case wxOR:           mode = GDK_OR;            break;
1198         case wxEQUIV:        mode = GDK_EQUIV;         break;
1199         case wxNAND:         mode = GDK_NAND;          break;
1200         case wxAND_INVERT:   mode = GDK_AND_INVERT;    break;
1201         case wxCOPY:         mode = GDK_COPY;          break;
1202         case wxNO_OP:        mode = GDK_NOOP;          break;
1203         case wxSRC_INVERT:   mode = GDK_COPY_INVERT;   break;
1204 #endif
1205         default:
1206         {
1207            wxFAIL_MSG( wxT("unsupported logical function") );
1208            break;
1209         }
1210     }
1211
1212     m_logicalFunction = function;
1213
1214     if (!m_window) return;
1215
1216     gdk_gc_set_function( m_penGC, mode );
1217     gdk_gc_set_function( m_brushGC, mode );
1218     gdk_gc_set_function( m_textGC, mode );
1219 }
1220
1221 void wxWindowDC::SetTextForeground( const wxColour &col )
1222 {
1223     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1224
1225     if (m_textForegroundColour == col) return;
1226
1227     m_textForegroundColour = col;
1228     if (!m_textForegroundColour.Ok()) return;
1229
1230     if (!m_window) return;
1231
1232     m_textForegroundColour.CalcPixel( m_cmap );
1233     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
1234 }
1235
1236 void wxWindowDC::SetTextBackground( const wxColour &col )
1237 {
1238     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1239
1240     if (m_textBackgroundColour == col) return;
1241
1242     m_textBackgroundColour = col;
1243     if (!m_textBackgroundColour.Ok()) return;
1244
1245     if (!m_window) return;
1246
1247     m_textBackgroundColour.CalcPixel( m_cmap );
1248     gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
1249 }
1250
1251 void wxWindowDC::SetBackgroundMode( int mode )
1252 {
1253     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1254
1255     m_backgroundMode = mode;
1256
1257     if (!m_window) return;
1258
1259     // CMB 21/7/98: fill style of cross-hatch brushes is affected by
1260     // transparent/solid background mode
1261
1262     if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
1263     {
1264         gdk_gc_set_fill( m_brushGC,
1265           (m_backgroundMode == wxTRANSPARENT) ? GDK_STIPPLED : GDK_OPAQUE_STIPPLED);
1266     }
1267 }
1268
1269 void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
1270 {
1271     wxFAIL_MSG( wxT("wxWindowDC::SetPalette not implemented") );
1272 }
1273
1274 void wxWindowDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
1275 {
1276     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1277
1278     wxDC::DoSetClippingRegion( x, y, width, height );
1279
1280     if (!m_window) return;
1281
1282     GdkRectangle rect;
1283     rect.x = XLOG2DEV(x);
1284     rect.y = YLOG2DEV(y);
1285     rect.width = XLOG2DEVREL(width);
1286     rect.height = YLOG2DEVREL(height);
1287     gdk_gc_set_clip_rectangle( m_penGC, &rect );
1288     gdk_gc_set_clip_rectangle( m_brushGC, &rect );
1289     gdk_gc_set_clip_rectangle( m_textGC, &rect );
1290     gdk_gc_set_clip_rectangle( m_bgGC, &rect );
1291 }
1292
1293 void wxWindowDC::DoSetClippingRegionAsRegion( const wxRegion &region  )
1294 {
1295     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1296
1297     if (region.Empty())
1298     {
1299         DestroyClippingRegion();
1300         return;
1301     }
1302
1303     if (!m_window) return;
1304
1305     gdk_gc_set_clip_region( m_penGC, region.GetRegion() );
1306     gdk_gc_set_clip_region( m_brushGC, region.GetRegion() );
1307     gdk_gc_set_clip_region( m_textGC, region.GetRegion() );
1308     gdk_gc_set_clip_region( m_bgGC, region.GetRegion() );
1309 }
1310
1311 void wxWindowDC::DestroyClippingRegion()
1312 {
1313     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1314
1315     wxDC::DestroyClippingRegion();
1316
1317     if (!m_window) return;
1318
1319     gdk_gc_set_clip_rectangle( m_penGC, (GdkRectangle *) NULL );
1320     gdk_gc_set_clip_rectangle( m_brushGC, (GdkRectangle *) NULL );
1321     gdk_gc_set_clip_rectangle( m_textGC, (GdkRectangle *) NULL );
1322     gdk_gc_set_clip_rectangle( m_bgGC, (GdkRectangle *) NULL );
1323 }
1324
1325 void wxWindowDC::SetUpDC()
1326 {
1327     Destroy();
1328     m_ok = TRUE;
1329     m_logicalFunction = wxCOPY;
1330     m_penGC = gdk_gc_new( m_window );
1331     m_brushGC = gdk_gc_new( m_window );
1332     m_textGC = gdk_gc_new( m_window );
1333     m_bgGC = gdk_gc_new( m_window );
1334
1335     wxColour tmp_col( m_textForegroundColour );
1336     m_textForegroundColour = wxNullColour;
1337     SetTextForeground( tmp_col );
1338     tmp_col = m_textBackgroundColour;
1339     m_textBackgroundColour = wxNullColour;
1340     SetTextBackground( tmp_col );
1341
1342     wxPen tmp_pen( m_pen );
1343     m_pen = wxNullPen;
1344     SetPen( tmp_pen );
1345
1346     wxFont tmp_font( m_font );
1347     m_font = wxNullFont;
1348     SetFont( tmp_font );
1349
1350     wxBrush tmp_brush( m_brush );
1351     m_brush = wxNullBrush;
1352     SetBrush( tmp_brush );
1353
1354 /*
1355     tmp_brush = m_backgroundBrush;
1356     m_backgroundBrush = wxNullBrush;
1357     SetBackground( tmp_brush );
1358 */
1359     tmp_brush = m_backgroundBrush;
1360     m_backgroundBrush = wxNullBrush;
1361     SetBackground( *wxWHITE_BRUSH );
1362     m_backgroundBrush = tmp_brush;
1363
1364     if (!hatch_bitmap)
1365     {
1366         hatch_bitmap    = hatches;
1367         hatch_bitmap[0] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, bdiag_bits, bdiag_width, bdiag_height );
1368         hatch_bitmap[1] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cdiag_bits, cdiag_width, cdiag_height );
1369         hatch_bitmap[2] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, fdiag_bits, fdiag_width, fdiag_height );
1370         hatch_bitmap[3] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cross_bits, cross_width, cross_height );
1371         hatch_bitmap[4] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, horiz_bits, horiz_width, horiz_height );
1372         hatch_bitmap[5] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, verti_bits, verti_width, verti_height );
1373     }
1374 }
1375
1376 void wxWindowDC::Destroy()
1377 {
1378     if (m_penGC) gdk_gc_unref( m_penGC );
1379     m_penGC = (GdkGC*) NULL;
1380     if (m_brushGC) gdk_gc_unref( m_brushGC );
1381     m_brushGC = (GdkGC*) NULL;
1382     if (m_textGC) gdk_gc_unref( m_textGC );
1383     m_textGC = (GdkGC*) NULL;
1384     if (m_bgGC) gdk_gc_unref( m_bgGC );
1385     m_bgGC = (GdkGC*) NULL;
1386 }
1387
1388 void wxWindowDC::ComputeScaleAndOrigin()
1389 {
1390     /* CMB: copy scale to see if it changes */
1391     double origScaleX = m_scaleX;
1392     double origScaleY = m_scaleY;
1393
1394     wxDC::ComputeScaleAndOrigin();
1395
1396     /* CMB: if scale has changed call SetPen to recalulate the line width */
1397     if ((m_scaleX != origScaleX || m_scaleY != origScaleY) &&
1398         (m_pen.Ok()))
1399     {
1400       /* this is a bit artificial, but we need to force wxDC to think
1401          the pen has changed */
1402       wxPen pen = m_pen;
1403       m_pen = wxNullPen;
1404       SetPen( pen );
1405   }
1406 }
1407
1408 // Resolution in pixels per logical inch
1409 wxSize wxWindowDC::GetPPI() const
1410 {
1411     return wxSize(100, 100);
1412 }
1413
1414 int wxWindowDC::GetDepth() const
1415 {
1416     wxFAIL_MSG(wxT("not implemented"));
1417
1418     return -1;
1419 }
1420
1421 #if wxUSE_SPLINES
1422 // ----------------------------------- spline code ----------------------------------------
1423
1424 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1425                          double a3, double b3, double a4, double b4);
1426 void wx_clear_stack();
1427 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1428         double *y3, double *x4, double *y4);
1429 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1430           double x4, double y4);
1431 static bool wx_spline_add_point(double x, double y);
1432 static void wx_spline_draw_point_array(wxDC *dc);
1433
1434 wxList wx_spline_point_list;
1435
1436 #define                half(z1, z2)        ((z1+z2)/2.0)
1437 #define                THRESHOLD        5
1438
1439 /* iterative version */
1440
1441 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1442                  double b4)
1443 {
1444     register double  xmid, ymid;
1445     double           x1, y1, x2, y2, x3, y3, x4, y4;
1446
1447     wx_clear_stack();
1448     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1449
1450     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1451         xmid = (double)half(x2, x3);
1452         ymid = (double)half(y2, y3);
1453         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1454             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1455             wx_spline_add_point( x1, y1 );
1456             wx_spline_add_point( xmid, ymid );
1457         } else {
1458             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1459                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1460             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1461                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1462         }
1463     }
1464 }
1465
1466 /* utilities used by spline drawing routines */
1467
1468 typedef struct wx_spline_stack_struct {
1469     double           x1, y1, x2, y2, x3, y3, x4, y4;
1470 } Stack;
1471
1472 #define         SPLINE_STACK_DEPTH             20
1473 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1474 static Stack   *wx_stack_top;
1475 static int      wx_stack_count;
1476
1477 void wx_clear_stack()
1478 {
1479     wx_stack_top = wx_spline_stack;
1480     wx_stack_count = 0;
1481 }
1482
1483 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1484 {
1485     wx_stack_top->x1 = x1;
1486     wx_stack_top->y1 = y1;
1487     wx_stack_top->x2 = x2;
1488     wx_stack_top->y2 = y2;
1489     wx_stack_top->x3 = x3;
1490     wx_stack_top->y3 = y3;
1491     wx_stack_top->x4 = x4;
1492     wx_stack_top->y4 = y4;
1493     wx_stack_top++;
1494     wx_stack_count++;
1495 }
1496
1497 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1498                   double *x3, double *y3, double *x4, double *y4)
1499 {
1500     if (wx_stack_count == 0)
1501         return (0);
1502     wx_stack_top--;
1503     wx_stack_count--;
1504     *x1 = wx_stack_top->x1;
1505     *y1 = wx_stack_top->y1;
1506     *x2 = wx_stack_top->x2;
1507     *y2 = wx_stack_top->y2;
1508     *x3 = wx_stack_top->x3;
1509     *y3 = wx_stack_top->y3;
1510     *x4 = wx_stack_top->x4;
1511     *y4 = wx_stack_top->y4;
1512     return (1);
1513 }
1514
1515 static bool wx_spline_add_point(double x, double y)
1516 {
1517   wxPoint *point = new wxPoint ;
1518   point->x = (int) x;
1519   point->y = (int) y;
1520   wx_spline_point_list.Append((wxObject*)point);
1521   return TRUE;
1522 }
1523
1524 static void wx_spline_draw_point_array(wxDC *dc)
1525 {
1526   dc->DrawLines(&wx_spline_point_list, 0, 0 );
1527   wxNode *node = wx_spline_point_list.First();
1528   while (node)
1529   {
1530     wxPoint *point = (wxPoint *)node->Data();
1531     delete point;
1532     delete node;
1533     node = wx_spline_point_list.First();
1534   }
1535 }
1536
1537 void wxWindowDC::DoDrawSpline( wxList *points )
1538 {
1539     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1540
1541     wxPoint *p;
1542     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1543     double           x1, y1, x2, y2;
1544
1545     wxNode *node = points->First();
1546     p = (wxPoint *)node->Data();
1547
1548     x1 = p->x;
1549     y1 = p->y;
1550
1551     node = node->Next();
1552     p = (wxPoint *)node->Data();
1553
1554     x2 = p->x;
1555     y2 = p->y;
1556     cx1 = (double)((x1 + x2) / 2);
1557     cy1 = (double)((y1 + y2) / 2);
1558     cx2 = (double)((cx1 + x2) / 2);
1559     cy2 = (double)((cy1 + y2) / 2);
1560
1561     wx_spline_add_point(x1, y1);
1562
1563     while ((node = node->Next()) != NULL)
1564     {
1565         p = (wxPoint *)node->Data();
1566         x1 = x2;
1567         y1 = y2;
1568         x2 = p->x;
1569         y2 = p->y;
1570         cx4 = (double)(x1 + x2) / 2;
1571         cy4 = (double)(y1 + y2) / 2;
1572         cx3 = (double)(x1 + cx4) / 2;
1573         cy3 = (double)(y1 + cy4) / 2;
1574
1575         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1576
1577         cx1 = cx4;
1578         cy1 = cy4;
1579         cx2 = (double)(cx1 + x2) / 2;
1580         cy2 = (double)(cy1 + y2) / 2;
1581     }
1582
1583     wx_spline_add_point( cx1, cy1 );
1584     wx_spline_add_point( x2, y2 );
1585
1586     wx_spline_draw_point_array( this );
1587 }
1588
1589 #endif // wxUSE_SPLINE
1590
1591 //-----------------------------------------------------------------------------
1592 // wxPaintDC
1593 //-----------------------------------------------------------------------------
1594
1595 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC,wxWindowDC)
1596
1597 wxPaintDC::wxPaintDC()
1598   : wxWindowDC()
1599 {
1600 }
1601
1602 wxPaintDC::wxPaintDC( wxWindow *win )
1603   : wxWindowDC( win )
1604 {
1605 }
1606
1607 //-----------------------------------------------------------------------------
1608 // wxClientDC
1609 //-----------------------------------------------------------------------------
1610
1611 IMPLEMENT_DYNAMIC_CLASS(wxClientDC,wxWindowDC)
1612
1613 wxClientDC::wxClientDC()
1614   : wxWindowDC()
1615 {
1616 }
1617
1618 wxClientDC::wxClientDC( wxWindow *win )
1619   : wxWindowDC( win )
1620 {
1621 }
1622