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 // private functions
  46 // ----------------------------------------------------------------------------
  47
  48 static inline double dmax(double a, double b) { return a > b ? a : b; }
  49 static inline double dmin(double a, double b) { return a < b ? a : b; }
  50
  51 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
  52
  53 //-----------------------------------------------------------------------------
  54 // temporary implementation of the missing GDK function
  55 //-----------------------------------------------------------------------------
  56
  57 #include "gdk/gdkprivate.h"
  58
  59 void gdk_draw_bitmap     (GdkDrawable  *drawable,
  60                           GdkGC               *gc,
  61                           GdkDrawable  *src,
  62                           gint                xsrc,
  63                           gint                ysrc,
  64                           gint                xdest,
  65                           gint                ydest,
  66                           gint                width,
  67                           gint                height)
  68 {
  69     GdkWindowPrivate *drawable_private;
  70     GdkWindowPrivate *src_private;
  71     GdkGCPrivate *gc_private;
  72
  73     g_return_if_fail (drawable != NULL);
  74     g_return_if_fail (src != NULL);
  75     g_return_if_fail (gc != NULL);
  76
  77     drawable_private = (GdkWindowPrivate*) drawable;
  78     src_private = (GdkWindowPrivate*) src;
  79     if (drawable_private->destroyed || src_private->destroyed)
  80         return;
  81
  82     gc_private = (GdkGCPrivate*) gc;
  83
  84     if (width == -1) width = src_private->width;
  85     if (height == -1) height = src_private->height;
  86
  87     XCopyPlane( drawable_private->xdisplay,
  88                 src_private->xwindow,
  89                 drawable_private->xwindow,
  90                 gc_private->xgc,
  91                 xsrc, ysrc,
  92                 width, height,
  93                 xdest, ydest,
  94                 1 );
  95 }
  96
  97 //-----------------------------------------------------------------------------
  98 // wxWindowDC
  99 //-----------------------------------------------------------------------------
 100
 101 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
 102
 103 wxWindowDC::wxWindowDC()
 104 {
 105     m_penGC = (GdkGC *) NULL;
 106     m_brushGC = (GdkGC *) NULL;
 107     m_textGC = (GdkGC *) NULL;
 108     m_bgGC = (GdkGC *) NULL;
 109     m_cmap = (GdkColormap *) NULL;
 110     m_isMemDC = FALSE;
 111     m_owner = (wxWindow *)NULL;
 112 }
 113
 114 wxWindowDC::wxWindowDC( wxWindow *window )
 115 {
 116     m_penGC = (GdkGC *) NULL;
 117     m_brushGC = (GdkGC *) NULL;
 118     m_textGC = (GdkGC *) NULL;
 119     m_bgGC = (GdkGC *) NULL;
 120     m_cmap = (GdkColormap *) NULL;
 121     m_owner = (wxWindow *)NULL;
 122     m_isMemDC = FALSE;
 123     m_font = window->GetFont();
 124
 125     wxASSERT_MSG( window, wxT("DC needs a window") );
 126
 127     GtkWidget *widget = window->m_wxwindow;
 128
 129     wxASSERT_MSG( widget, wxT("DC needs a widget") );
 130
 131     GtkPizza *pizza = GTK_PIZZA( widget );
 132     m_window = pizza->bin_window;
 133
 134     /* not realized ? */
 135     if (!m_window)
 136     {
 137          /* don't report problems */
 138          m_ok = TRUE;
 139
 140          return;
 141     }
 142
 143     if (window->m_wxwindow)
 144         m_cmap = gtk_widget_get_colormap( window->m_wxwindow );
 145     else
 146         m_cmap = gtk_widget_get_colormap( window->m_widget );
 147
 148     SetUpDC();
 149
 150     /* this must be done after SetUpDC, bacause SetUpDC calls the
 151        repective SetBrush, SetPen, SetBackground etc functions
 152        to set up the DC. SetBackground call m_owner->SetBackground
 153        and this might not be desired as the standard dc background
 154        is white whereas a window might assume gray to be the
 155        standard (as e.g. wxStatusBar) */
 156
 157     m_owner = window;
 158 }
 159
 160 wxWindowDC::~wxWindowDC()
 161 {
 162     Destroy();
 163 }
 164
 165 void wxWindowDC::DoFloodFill( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 166                            const wxColour &WXUNUSED(col), int WXUNUSED(style) )
 167 {
 168     wxFAIL_MSG( wxT("wxWindowDC::DoFloodFill not implemented") );
 169 }
 170
 171 bool wxWindowDC::DoGetPixel( wxCoord WXUNUSED(x1), wxCoord WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
 172 {
 173     wxFAIL_MSG( wxT("wxWindowDC::DoGetPixel not implemented") );
 174     return FALSE;
 175 }
 176
 177 void wxWindowDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 178 {
 179     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 180
 181     if (m_pen.GetStyle() != wxTRANSPARENT)
 182     {
 183         if (m_window)
 184             gdk_draw_line( m_window, m_penGC, XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2) );
 185
 186         CalcBoundingBox(x1, y1);
 187         CalcBoundingBox(x2, y2);
 188     }
 189 }
 190
 191 void wxWindowDC::DoCrossHair( wxCoord x, wxCoord y )
 192 {
 193     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 194
 195     if (m_pen.GetStyle() != wxTRANSPARENT)
 196     {
 197         int w = 0;
 198         int h = 0;
 199         GetSize( &w, &h );
 200         wxCoord xx = XLOG2DEV(x);
 201         wxCoord yy = YLOG2DEV(y);
 202         if (m_window)
 203         {
 204             gdk_draw_line( m_window, m_penGC, 0, yy, XLOG2DEVREL(w), yy );
 205             gdk_draw_line( m_window, m_penGC, xx, 0, xx, YLOG2DEVREL(h) );
 206         }
 207     }
 208 }
 209
 210 void wxWindowDC::DoDrawArc( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2,
 211                             wxCoord xc, wxCoord yc )
 212 {
 213     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 214
 215     wxCoord xx1 = XLOG2DEV(x1);
 216     wxCoord yy1 = YLOG2DEV(y1);
 217     wxCoord xx2 = XLOG2DEV(x2);
 218     wxCoord yy2 = YLOG2DEV(y2);
 219     wxCoord xxc = XLOG2DEV(xc);
 220     wxCoord yyc = YLOG2DEV(yc);
 221     double dx = xx1 - xxc;
 222     double dy = yy1 - yyc;
 223     double radius = sqrt((double)(dx*dx+dy*dy));
 224     wxCoord   r      = (wxCoord)radius;
 225     double radius1, radius2;
 226
 227     if (xx1 == xx2 && yy1 == yy2)
 228     {
 229         radius1 = 0.0;
 230         radius2 = 360.0;
 231     }
 232     else
 233     if (radius == 0.0)
 234     {
 235         radius1 = radius2 = 0.0;
 236     }
 237     else
 238     {
 239         radius1 = (xx1 - xxc == 0) ?
 240             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 241             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 242         radius2 = (xx2 - xxc == 0) ?
 243             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 244             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 245     }
 246     wxCoord alpha1 = wxCoord(radius1 * 64.0);
 247     wxCoord alpha2 = wxCoord((radius2 - radius1) * 64.0);
 248     while (alpha2 <= 0) alpha2 += 360*64;
 249     while (alpha1 > 360*64) alpha1 -= 360*64;
 250
 251     if (m_window)
 252     {
 253         if (m_brush.GetStyle() != wxTRANSPARENT)
 254             gdk_draw_arc( m_window, m_brushGC, TRUE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 255
 256         if (m_pen.GetStyle() != wxTRANSPARENT)
 257             gdk_draw_arc( m_window, m_penGC, FALSE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 258     }
 259
 260     CalcBoundingBox (x1, y1);
 261     CalcBoundingBox (x2, y2);
 262 }
 263
 264 void wxWindowDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double sa, double ea )
 265 {
 266     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 267
 268     wxCoord xx = XLOG2DEV(x);
 269     wxCoord yy = YLOG2DEV(y);
 270     wxCoord ww = m_signX * XLOG2DEVREL(width);
 271     wxCoord hh = m_signY * YLOG2DEVREL(height);
 272
 273     // CMB: handle -ve width and/or height
 274     if (ww < 0) { ww = -ww; xx = xx - ww; }
 275     if (hh < 0) { hh = -hh; yy = yy - hh; }
 276
 277     if (m_window)
 278     {
 279         wxCoord start = wxCoord(sa * 64.0);
 280         wxCoord end = wxCoord(ea * 64.0);
 281
 282         if (m_brush.GetStyle() != wxTRANSPARENT)
 283             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, start, end );
 284
 285         if (m_pen.GetStyle() != wxTRANSPARENT)
 286             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, start, end );
 287     }
 288
 289     CalcBoundingBox (x, y);
 290     CalcBoundingBox (x + width, y + height);
 291 }
 292
 293 void wxWindowDC::DoDrawPoint( wxCoord x, wxCoord y )
 294 {
 295     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 296
 297     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 298         gdk_draw_point( m_window, m_penGC, XLOG2DEV(x), YLOG2DEV(y) );
 299
 300     CalcBoundingBox (x, y);
 301 }
 302
 303 void wxWindowDC::DoDrawLines( int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset )
 304 {
 305     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 306
 307     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 308     if (n <= 0) return;
 309
 310     CalcBoundingBox( points[0].x + xoffset, points[0].y + yoffset );
 311
 312     for (int i = 0; i < n-1; i++)
 313     {
 314         wxCoord x1 = XLOG2DEV(points[i].x + xoffset);
 315         wxCoord x2 = XLOG2DEV(points[i+1].x + xoffset);
 316         wxCoord y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 317         wxCoord y2 = YLOG2DEV(points[i+1].y + yoffset);
 318
 319         if (m_window)
 320             gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 321
 322         CalcBoundingBox( points[i+1].x + xoffset, points[i+1].y + yoffset );
 323     }
 324 }
 325
 326 void wxWindowDC::DoDrawPolygon( int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset, int WXUNUSED(fillStyle) )
 327 {
 328     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 329
 330     if (n <= 0) return;
 331
 332     GdkPoint *gdkpoints = new GdkPoint[n+1];
 333     int i;
 334     for (i = 0 ; i < n ; i++)
 335     {
 336         gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
 337         gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
 338
 339         CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset );
 340     }
 341
 342     if ((m_brush.GetStyle() != wxTRANSPARENT) && m_window)
 343         gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 344
 345     // To do: Fillstyle
 346
 347     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 348     {
 349         for (i = 0 ; i < n ; i++)
 350         {
 351             gdk_draw_line( m_window, m_penGC,
 352                            gdkpoints[i%n].x,
 353                            gdkpoints[i%n].y,
 354                            gdkpoints[(i+1)%n].x,
 355                            gdkpoints[(i+1)%n].y);
 356         }
 357     }
 358
 359     delete[] gdkpoints;
 360 }
 361
 362 void wxWindowDC::DoDrawRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 363 {
 364     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 365
 366     wxCoord xx = XLOG2DEV(x);
 367     wxCoord yy = YLOG2DEV(y);
 368     wxCoord ww = m_signX * XLOG2DEVREL(width);
 369     wxCoord hh = m_signY * YLOG2DEVREL(height);
 370
 371     // CMB: draw nothing if transformed w or h is 0
 372     if (ww == 0 || hh == 0) return;
 373
 374     // CMB: handle -ve width and/or height
 375     if (ww < 0) { ww = -ww; xx = xx - ww; }
 376     if (hh < 0) { hh = -hh; yy = yy - hh; }
 377
 378     if (m_window)
 379     {
 380         if (m_brush.GetStyle() != wxTRANSPARENT)
 381             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 382
 383         if (m_pen.GetStyle() != wxTRANSPARENT)
 384             gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 385     }
 386
 387     CalcBoundingBox( x, y );
 388     CalcBoundingBox( x + width, y + height );
 389 }
 390
 391 void wxWindowDC::DoDrawRoundedRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
 392 {
 393     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 394
 395     if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 396
 397     wxCoord xx = XLOG2DEV(x);
 398     wxCoord yy = YLOG2DEV(y);
 399     wxCoord ww = m_signX * XLOG2DEVREL(width);
 400     wxCoord hh = m_signY * YLOG2DEVREL(height);
 401     wxCoord rr = XLOG2DEVREL((wxCoord)radius);
 402
 403     // CMB: handle -ve width and/or height
 404     if (ww < 0) { ww = -ww; xx = xx - ww; }
 405     if (hh < 0) { hh = -hh; yy = yy - hh; }
 406
 407     // CMB: if radius is zero use DrawRectangle() instead to avoid
 408     // X drawing errors with small radii
 409     if (rr == 0)
 410     {
 411         DrawRectangle( x, y, width, height );
 412         return;
 413     }
 414
 415     // CMB: draw nothing if transformed w or h is 0
 416     if (ww == 0 || hh == 0) return;
 417
 418     // CMB: adjust size if outline is drawn otherwise the result is
 419     // 1 pixel too wide and high
 420     if (m_pen.GetStyle() != wxTRANSPARENT)
 421     {
 422         ww--;
 423         hh--;
 424     }
 425
 426     if (m_window)
 427     {
 428         // CMB: ensure dd is not larger than rectangle otherwise we
 429         // get an hour glass shape
 430         wxCoord dd = 2 * rr;
 431         if (dd > ww) dd = ww;
 432         if (dd > hh) dd = hh;
 433         rr = dd / 2;
 434
 435         if (m_brush.GetStyle() != wxTRANSPARENT)
 436         {
 437             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 438             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 439             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 440             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 441             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 442             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 443         }
 444
 445         if (m_pen.GetStyle() != wxTRANSPARENT)
 446         {
 447             gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 448             gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 449             gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 450             gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 451             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 452             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 453             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 454             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 455         }
 456     }
 457
 458     // this ignores the radius
 459     CalcBoundingBox( x, y );
 460     CalcBoundingBox( x + width, y + height );
 461 }
 462
 463 void wxWindowDC::DoDrawEllipse( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 464 {
 465     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 466
 467     wxCoord xx = XLOG2DEV(x);
 468     wxCoord yy = YLOG2DEV(y);
 469     wxCoord ww = m_signX * XLOG2DEVREL(width);
 470     wxCoord hh = m_signY * YLOG2DEVREL(height);
 471
 472     // CMB: handle -ve width and/or height
 473     if (ww < 0) { ww = -ww; xx = xx - ww; }
 474     if (hh < 0) { hh = -hh; yy = yy - hh; }
 475
 476     if (m_window)
 477     {
 478         if (m_brush.GetStyle() != wxTRANSPARENT)
 479             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 480
 481         if (m_pen.GetStyle() != wxTRANSPARENT)
 482             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 483     }
 484
 485     CalcBoundingBox( x - width, y - height );
 486     CalcBoundingBox( x + width, y + height );
 487 }
 488
 489 void wxWindowDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
 490 {
 491     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 492     DoDrawBitmap( (const wxBitmap&)icon, x, y, (bool)TRUE );
 493 }
 494
 495 void wxWindowDC::DoDrawBitmap( const wxBitmap &bitmap,
 496                                wxCoord x, wxCoord y,
 497                                bool useMask )
 498 {
 499     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 500
 501     wxCHECK_RET( bitmap.Ok(), wxT("invalid bitmap") );
 502
 503     bool is_mono = (bitmap.GetBitmap());
 504
 505     /* scale/translate size and position */
 506
 507     int xx = XLOG2DEV(x);
 508     int yy = YLOG2DEV(y);
 509
 510     int w = bitmap.GetWidth();
 511     int h = bitmap.GetHeight();
 512
 513     CalcBoundingBox( x, y );
 514     CalcBoundingBox( x + w, y + h );
 515
 516     if (!m_window) return;
 517
 518     int ww = XLOG2DEVREL(w);
 519     int hh = YLOG2DEVREL(h);
 520
 521     /* scale bitmap if required */
 522
 523     wxBitmap use_bitmap;
 524
 525     if ((w != ww) || (h != hh))
 526     {
 527         wxImage image( bitmap );
 528         image.Rescale( ww, hh );
 529         if (is_mono)
 530             use_bitmap = image.ConvertToMonoBitmap(255,255,255);
 531         else
 532             use_bitmap = image.ConvertToBitmap();
 533     }
 534     else
 535     {
 536         use_bitmap = bitmap;
 537     }
 538
 539     /* apply mask if any */
 540
 541     GdkBitmap *mask = (GdkBitmap *) NULL;
 542     if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 543
 544     if (useMask && mask)
 545     {
 546         if (is_mono)
 547         {
 548             gdk_gc_set_clip_mask( m_textGC, mask );
 549             gdk_gc_set_clip_origin( m_textGC, xx, yy );
 550         }
 551         else
 552         {
 553             gdk_gc_set_clip_mask( m_penGC, mask );
 554             gdk_gc_set_clip_origin( m_penGC, xx, yy );
 555         }
 556     }
 557
 558     /* Draw XPixmap or XBitmap, depending on what the wxBitmap contains. For
 559        drawing a mono-bitmap (XBitmap) we use the current text GC */
 560     if (is_mono)
 561         gdk_draw_bitmap( m_window, m_textGC, use_bitmap.GetBitmap(), 0, 0, xx, yy, -1, -1 );
 562     else
 563         gdk_draw_pixmap( m_window, m_penGC, use_bitmap.GetPixmap(), 0, 0, xx, yy, -1, -1 );
 564
 565     /* remove mask again if any */
 566
 567     if (useMask && mask)
 568     {
 569         if (is_mono)
 570         {
 571             gdk_gc_set_clip_mask( m_textGC, (GdkBitmap *) NULL );
 572             gdk_gc_set_clip_origin( m_textGC, 0, 0 );
 573         }
 574         else
 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
 582 bool wxWindowDC::DoBlit( wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 583                          wxDC *source, wxCoord xsrc, wxCoord ysrc,
 584                          int logical_func, bool useMask )
 585 {
 586    /* this is the nth try to get this utterly useless function to
 587       work. it now completely ignores the scaling or translation
 588       of the source dc, but scales correctly on the target dc and
 589       knows about possible mask information in a memory dc. */
 590
 591     wxCHECK_MSG( Ok(), FALSE, wxT("invalid window dc") );
 592
 593     wxCHECK_MSG( source, FALSE, wxT("invalid source dc") );
 594
 595     if (!m_window) return FALSE;
 596
 597     wxClientDC *srcDC = (wxClientDC*)source;
 598     wxMemoryDC *memDC = (wxMemoryDC*)source;
 599
 600     bool use_bitmap_method = FALSE;
 601     bool is_mono = FALSE;
 602
 603     if (srcDC->m_isMemDC)
 604     {
 605         if (!memDC->m_selected.Ok()) return FALSE;
 606
 607         /* we use the "XCopyArea" way to copy a memory dc into
 608            y different window if the memory dc BOTH
 609            a) doesn't have any mask or its mask isn't used
 610            b) it is clipped
 611            c) is not 1-bit */
 612
 613         if (useMask && (memDC->m_selected.GetMask()))
 614         {
 615            /* we HAVE TO use the direct way for memory dcs
 616               that have mask since the XCopyArea doesn't know
 617               about masks */
 618             use_bitmap_method = TRUE;
 619         }
 620         else if (memDC->m_selected.GetDepth() == 1)
 621         {
 622            /* we HAVE TO use the direct way for memory dcs
 623               that are bitmaps because XCopyArea doesn't cope
 624               with different bit depths */
 625             is_mono = TRUE;
 626             use_bitmap_method = TRUE;
 627         }
 628         else if ((xsrc == 0) && (ysrc == 0) &&
 629                  (width == memDC->m_selected.GetWidth()) &&
 630                  (height == memDC->m_selected.GetHeight()))
 631         {
 632            /* we SHOULD use the direct way if all of the bitmap
 633               in the memory dc is copied in which case XCopyArea
 634               wouldn't be able able to boost performace by reducing
 635               the area to be scaled */
 636             use_bitmap_method = TRUE;
 637         }
 638         else
 639         {
 640             use_bitmap_method = FALSE;
 641         }
 642     }
 643
 644     CalcBoundingBox( xdest, ydest );
 645     CalcBoundingBox( xdest + width, ydest + height );
 646
 647     int old_logical_func = m_logicalFunction;
 648     SetLogicalFunction( logical_func );
 649
 650     if (use_bitmap_method)
 651     {
 652         /* scale/translate bitmap size */
 653
 654         wxCoord bm_width = memDC->m_selected.GetWidth();
 655         wxCoord bm_height = memDC->m_selected.GetHeight();
 656
 657         wxCoord bm_ww = XLOG2DEVREL( bm_width );
 658         wxCoord bm_hh = YLOG2DEVREL( bm_height );
 659
 660         /* scale bitmap if required */
 661
 662         wxBitmap use_bitmap;
 663
 664         if ((bm_width != bm_ww) || (bm_height != bm_hh))
 665         {
 666             wxImage image( memDC->m_selected );
 667             image = image.Scale( bm_ww, bm_hh );
 668
 669             if (is_mono)
 670                 use_bitmap = image.ConvertToMonoBitmap(255,255,255);
 671             else
 672                 use_bitmap = image.ConvertToBitmap();
 673         }
 674         else
 675         {
 676             use_bitmap = memDC->m_selected;
 677         }
 678
 679         /* scale/translate size and position */
 680
 681         wxCoord xx = XLOG2DEV(xdest);
 682         wxCoord yy = YLOG2DEV(ydest);
 683
 684         wxCoord ww = XLOG2DEVREL(width);
 685         wxCoord hh = YLOG2DEVREL(height);
 686
 687         /* apply mask if any */
 688
 689         GdkBitmap *mask = (GdkBitmap *) NULL;
 690         if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 691
 692         if (useMask && mask)
 693         {
 694             if (is_mono)
 695             {
 696                 gdk_gc_set_clip_mask( m_textGC, mask );
 697                 gdk_gc_set_clip_origin( m_textGC, xx, yy );
 698             }
 699             else
 700             {
 701                 gdk_gc_set_clip_mask( m_penGC, mask );
 702                 gdk_gc_set_clip_origin( m_penGC, xx, yy );
 703             }
 704         }
 705
 706         /* Draw XPixmap or XBitmap, depending on what the wxBitmap contains. For
 707            drawing a mono-bitmap (XBitmap) we use the current text GC */
 708         if (is_mono)
 709             gdk_draw_bitmap( m_window, m_textGC, use_bitmap.GetBitmap(), xsrc, ysrc, xx, yy, ww, hh );
 710         else
 711             gdk_draw_pixmap( m_window, m_penGC, use_bitmap.GetPixmap(), xsrc, ysrc, xx, yy, ww, hh );
 712
 713         /* remove mask again if any */
 714
 715         if (useMask && mask)
 716         {
 717             if (is_mono)
 718             {
 719                 gdk_gc_set_clip_mask( m_textGC, (GdkBitmap *) NULL );
 720                 gdk_gc_set_clip_origin( m_textGC, 0, 0 );
 721             }
 722             else
 723             {
 724                 gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 725                 gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 726             }
 727         }
 728     }
 729     else /* use_bitmap_method */
 730     {
 731         /* scale/translate size and position */
 732
 733         wxCoord xx = XLOG2DEV(xdest);
 734         wxCoord yy = YLOG2DEV(ydest);
 735
 736         wxCoord ww = XLOG2DEVREL(width);
 737         wxCoord hh = YLOG2DEVREL(height);
 738
 739         if ((width != ww) || (height != hh))
 740         {
 741             /* draw source window into a bitmap as we cannot scale
 742                a window in contrast to a bitmap. this would actually
 743                work with memory dcs as well, but we'd lose the mask
 744                information and waste one step in this process since
 745                a memory already has a bitmap. all this is slightly
 746                inefficient as we could take an XImage directly from
 747                an X window, but we'd then also have to care that
 748                the window is not outside the screen (in which case
 749                we'd get a BadMatch or what not).
 750                Is a double XGetImage and combined XGetPixel and
 751                XPutPixel really faster? I'm not sure. look at wxXt
 752                for a different implementation of the same problem. */
 753
 754             wxBitmap bitmap( width, height );
 755             gdk_window_copy_area( bitmap.GetPixmap(), m_penGC, 0, 0,
 756                                   srcDC->GetWindow(),
 757                                   xsrc, ysrc, width, height );
 758
 759             /* scale image */
 760
 761             wxImage image( bitmap );
 762             image = image.Scale( ww, hh );
 763
 764             /* convert to bitmap */
 765
 766             bitmap = image.ConvertToBitmap();
 767
 768             /* draw scaled bitmap */
 769
 770             gdk_draw_pixmap( m_window, m_penGC, bitmap.GetPixmap(), 0, 0, xx, yy, -1, -1 );
 771
 772         }
 773         else
 774         {
 775             /* no scaling and not a memory dc with a mask either */
 776
 777             gdk_window_copy_area( m_window, m_penGC, xx, yy,
 778                                   srcDC->GetWindow(),
 779                                   xsrc, ysrc, width, height );
 780         }
 781     }
 782
 783     SetLogicalFunction( old_logical_func );
 784     return TRUE;
 785 }
 786
 787 void wxWindowDC::DoDrawText( const wxString &text, wxCoord x, wxCoord y )
 788 {
 789     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 790
 791     if (!m_window) return;
 792
 793     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 794
 795     wxCHECK_RET( font, wxT("invalid font") );
 796
 797     x = XLOG2DEV(x);
 798     y = YLOG2DEV(y);
 799
 800     /* CMB 21/5/98: draw text background if mode is wxSOLID */
 801     if (m_backgroundMode == wxSOLID)
 802     {
 803         wxCoord width = gdk_string_width( font, text.mbc_str() );
 804         wxCoord height = font->ascent + font->descent;
 805         gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 806         gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 807         gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 808     }
 809     gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text.mbc_str() );
 810
 811     /* CMB 17/7/98: simple underline: ignores scaling and underlying
 812        X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 813        properties (see wxXt implementation) */
 814     if (m_font.GetUnderlined())
 815     {
 816         wxCoord width = gdk_string_width( font, text.mbc_str() );
 817         wxCoord ul_y = y + font->ascent;
 818         if (font->descent > 0) ul_y++;
 819         gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 820     }
 821
 822     wxCoord w, h;
 823     GetTextExtent (text, &w, &h);
 824     CalcBoundingBox (x + w, y + h);
 825     CalcBoundingBox (x, y);
 826 }
 827
 828 void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y, double angle )
 829 {
 830     if (angle == 0.0)
 831     {
 832         DrawText(text, x, y);
 833         return;
 834     }
 835
 836     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 837
 838     if (!m_window) return;
 839
 840     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 841
 842     wxCHECK_RET( font, wxT("invalid font") );
 843
 844     // the size of the text
 845     wxCoord w = gdk_string_width( font, text.mbc_str() );
 846     wxCoord h = font->ascent + font->descent;
 847
 848     // draw the string normally
 849     wxBitmap src(w, h);
 850     wxMemoryDC dc;
 851     dc.SelectObject(src);
 852     dc.SetFont(GetFont());
 853     dc.SetBackground(*wxWHITE_BRUSH);
 854     dc.SetBrush(*wxBLACK_BRUSH);
 855     dc.Clear();
 856     dc.DrawText(text, 0, 0);
 857     dc.SetFont(wxNullFont);
 858     dc.SelectObject(wxNullBitmap);
 859
 860     // Calculate the size of the rotated bounding box.
 861     double rad = DegToRad(angle);
 862     double dx = cos(rad),
 863            dy = sin(rad);
 864
 865     // the rectngle vertices are counted clockwise with the first one being at
 866     // (0, 0) (or, rather, at (x, y))
 867     double x2 = w*dx,
 868            y2 = -w*dy;      // y axis points to the bottom, hence minus
 869     double x4 = h*dy,
 870            y4 = h*dx;
 871     double x3 = x4 + x2,
 872            y3 = y4 + y2;
 873
 874     // calc max and min
 875     wxCoord maxX = (wxCoord)(dmax(x2, dmax(x3, x4)) + 0.5),
 876             maxY = (wxCoord)(dmax(y2, dmax(y3, y4)) + 0.5),
 877             minX = (wxCoord)(dmin(x2, dmin(x3, x4)) - 0.5),
 878             minY = (wxCoord)(dmin(y2, dmin(y3, y4)) - 0.5);
 879
 880     // prepare to blit-with-rotate the bitmap to the DC
 881     wxImage image(src);
 882
 883     GdkColor *colText = m_textForegroundColour.GetColor(),
 884              *colBack = m_textBackgroundColour.GetColor();
 885
 886     bool textColSet = TRUE;
 887
 888     unsigned char *data = image.GetData();
 889
 890     // paint pixel by pixel
 891     for ( wxCoord srcX = 0; srcX < w; srcX++ )
 892     {
 893         for ( wxCoord srcY = 0; srcY < h; srcY++ )
 894         {
 895             // transform source coords to dest coords
 896             double r = sqrt(srcX*srcX + srcY*srcY);
 897             double angleOrig = atan2(srcY, srcX) - rad;
 898             wxCoord dstX = (wxCoord)(r*cos(angleOrig) + 0.5),
 899                     dstY = (wxCoord)(r*sin(angleOrig) + 0.5);
 900
 901             // black pixel?
 902             bool textPixel = data[(srcY*w + srcX)*3] == 0;
 903             if ( textPixel || (m_backgroundMode == wxSOLID) )
 904             {
 905                 // change colour if needed
 906                 if ( textPixel != textColSet )
 907                 {
 908                     gdk_gc_set_foreground( m_textGC, textPixel ? colText
 909                                                                : colBack );
 910
 911                     textColSet = textPixel;
 912                 }
 913
 914                 // don't use DrawPoint() because it uses the current pen
 915                 // colour, and we don't need it here
 916                 gdk_draw_point( m_window, m_textGC,
 917                                 XLOG2DEV(x + dstX), YLOG2DEV(y + dstY) );
 918             }
 919         }
 920     }
 921
 922     // it would be better to draw with non underlined font and draw the line
 923     // manually here (it would be more straight...)
 924 #if 0
 925     if ( m_font.GetUnderlined() )
 926     {
 927         gdk_draw_line( m_window, m_textGC,
 928                        XLOG2DEV(x + x4), YLOG2DEV(y + y4 + font->descent),
 929                        XLOG2DEV(x + x3), YLOG2DEV(y + y3 + font->descent));
 930     }
 931 #endif // 0
 932
 933     // restore the font colour
 934     gdk_gc_set_foreground( m_textGC, colText );
 935
 936     // update the bounding box
 937     CalcBoundingBox(x + minX, y + minY);
 938     CalcBoundingBox(x + maxX, y + maxY);
 939 }
 940
 941 void wxWindowDC::DoGetTextExtent(const wxString &string,
 942                                  wxCoord *width, wxCoord *height,
 943                                  wxCoord *descent, wxCoord *externalLeading,
 944                                  wxFont *theFont) const
 945 {
 946     wxFont fontToUse = m_font;
 947     if (theFont) fontToUse = *theFont;
 948
 949     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 950     if (width) (*width) = wxCoord(gdk_string_width( font, string.mbc_str() ) / m_scaleX);
 951     if (height) (*height) = wxCoord((font->ascent + font->descent) / m_scaleY);
 952     if (descent) (*descent) = wxCoord(font->descent / m_scaleY);
 953     if (externalLeading) (*externalLeading) = 0;  // ??
 954 }
 955
 956 wxCoord wxWindowDC::GetCharWidth() const
 957 {
 958     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 959     wxCHECK_MSG( font, -1, wxT("invalid font") );
 960
 961     return wxCoord(gdk_string_width( font, "H" ) / m_scaleX);
 962 }
 963
 964 wxCoord wxWindowDC::GetCharHeight() const
 965 {
 966     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 967     wxCHECK_MSG( font, -1, wxT("invalid font") );
 968
 969     return wxCoord((font->ascent + font->descent) / m_scaleY);
 970 }
 971
 972 void wxWindowDC::Clear()
 973 {
 974     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 975
 976     if (!m_window) return;
 977
 978     /* - we either are a memory dc or have a window as the
 979        owner. anything else shouldn't happen.
 980        - we don't use gdk_window_clear() as we don't set
 981        the window's background colour anymore. it is too
 982        much pain to keep the DC's and the window's back-
 983        ground colour in synch. */
 984
 985     if (m_owner)
 986     {
 987         int width,height;
 988         m_owner->GetSize( &width, &height );
 989         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 990         return;
 991     }
 992
 993     if (m_isMemDC)
 994     {
 995         int width,height;
 996         GetSize( &width, &height );
 997         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
 998         return;
 999     }
1000 }
1001
1002 void wxWindowDC::SetFont( const wxFont &font )
1003 {
1004     m_font = font;
1005 }
1006
1007 void wxWindowDC::SetPen( const wxPen &pen )
1008 {
1009     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1010
1011     if (m_pen == pen) return;
1012
1013     m_pen = pen;
1014
1015     if (!m_pen.Ok()) return;
1016
1017     if (!m_window) return;
1018
1019     gint width = m_pen.GetWidth();
1020     if (width <= 0)
1021     {
1022         // CMB: if width is non-zero scale it with the dc
1023         width = 1;
1024     }
1025     else
1026     {
1027         // X doesn't allow different width in x and y and so we take
1028         // the average
1029         double w = 0.5 +
1030                    ( fabs((double) XLOG2DEVREL(width)) +
1031                      fabs((double) YLOG2DEVREL(width)) ) / 2.0;
1032         width = (int)w;
1033     }
1034
1035     static const char dotted[] = {1, 1};
1036     static const char short_dashed[] = {2, 2};
1037     static const char wxCoord_dashed[] = {2, 4};
1038     static const char dotted_dashed[] = {3, 3, 1, 3};
1039
1040     // We express dash pattern in pen width unit, so we are
1041     // independent of zoom factor and so on...
1042     int req_nb_dash;
1043     const char *req_dash;
1044
1045     GdkLineStyle lineStyle = GDK_LINE_SOLID;
1046     switch (m_pen.GetStyle())
1047     {
1048         case wxUSER_DASH:
1049         {
1050             lineStyle = GDK_LINE_ON_OFF_DASH;
1051             req_nb_dash = m_pen.GetDashCount();
1052             req_dash = m_pen.GetDash();
1053             break;
1054         }
1055         case wxDOT:
1056         {
1057             lineStyle = GDK_LINE_ON_OFF_DASH;
1058             req_nb_dash = 2;
1059             req_dash = dotted;
1060             break;
1061         }
1062         case wxLONG_DASH:
1063         {
1064             lineStyle = GDK_LINE_ON_OFF_DASH;
1065             req_nb_dash = 2;
1066             req_dash = wxCoord_dashed;
1067             break;
1068         }
1069         case wxSHORT_DASH:
1070         {
1071             lineStyle = GDK_LINE_ON_OFF_DASH;
1072             req_nb_dash = 2;
1073             req_dash = short_dashed;
1074             break;
1075         }
1076         case wxDOT_DASH:
1077         {
1078 //            lineStyle = GDK_LINE_DOUBLE_DASH;
1079             lineStyle = GDK_LINE_ON_OFF_DASH;
1080             req_nb_dash = 4;
1081             req_dash = dotted_dashed;
1082             break;
1083         }
1084
1085         case wxTRANSPARENT:
1086         case wxSTIPPLE:
1087         case wxSOLID:
1088         default:
1089         {
1090             lineStyle = GDK_LINE_SOLID;
1091             req_dash = (wxDash*)NULL;
1092             req_nb_dash = 0;
1093             break;
1094         }
1095     }
1096
1097 #if (GTK_MINOR_VERSION > 0)
1098     if (req_dash && req_nb_dash)
1099     {
1100         char *real_req_dash = new char[req_nb_dash];
1101         if (real_req_dash)
1102         {
1103             for (int i = 0; i < req_nb_dash; i++)
1104                 real_req_dash[i] = req_dash[i] * width;
1105             gdk_gc_set_dashes( m_penGC, 0, real_req_dash, req_nb_dash );
1106             delete[] real_req_dash;
1107         }
1108         else
1109         {
1110             // No Memory. We use non-scaled dash pattern...
1111             gdk_gc_set_dashes( m_penGC, 0, (char*)req_dash, req_nb_dash );
1112         }
1113     }
1114 #endif
1115
1116     GdkCapStyle capStyle = GDK_CAP_ROUND;
1117     switch (m_pen.GetCap())
1118     {
1119         case wxCAP_ROUND:      { capStyle = (width <= 1) ? GDK_CAP_NOT_LAST : GDK_CAP_ROUND; break; }
1120         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
1121         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
1122     }
1123
1124     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
1125     switch (m_pen.GetJoin())
1126     {
1127         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
1128         case wxJOIN_ROUND: { joinStyle = GDK_JOIN_ROUND; break; }
1129         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
1130     }
1131
1132     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
1133
1134     m_pen.GetColour().CalcPixel( m_cmap );
1135     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
1136 }
1137
1138 void wxWindowDC::SetBrush( const wxBrush &brush )
1139 {
1140     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1141
1142     if (m_brush == brush) return;
1143
1144     m_brush = brush;
1145
1146     if (!m_brush.Ok()) return;
1147
1148     if (!m_window) return;
1149
1150     m_brush.GetColour().CalcPixel( m_cmap );
1151     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
1152
1153     gdk_gc_set_fill( m_brushGC, GDK_SOLID );
1154
1155     if ((m_brush.GetStyle() == wxSTIPPLE) && (m_brush.GetStipple()->Ok()))
1156     {
1157         if (m_brush.GetStipple()->GetPixmap())
1158         {
1159             gdk_gc_set_fill( m_brushGC, GDK_TILED );
1160             gdk_gc_set_tile( m_brushGC, m_brush.GetStipple()->GetPixmap() );
1161         }
1162         else
1163         {
1164             gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1165             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetBitmap() );
1166         }
1167     }
1168
1169     if (IS_HATCH(m_brush.GetStyle()))
1170     {
1171         gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1172         int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
1173         gdk_gc_set_stipple( m_brushGC, hatches[num] );
1174     }
1175 }
1176
1177 void wxWindowDC::SetBackground( const wxBrush &brush )
1178 {
1179    /* CMB 21/7/98: Added SetBackground. Sets background brush
1180     * for Clear() and bg colour for shapes filled with cross-hatch brush */
1181
1182     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1183
1184     if (m_backgroundBrush == brush) return;
1185
1186     m_backgroundBrush = brush;
1187
1188     if (!m_backgroundBrush.Ok()) return;
1189
1190     if (!m_window) return;
1191
1192     m_backgroundBrush.GetColour().CalcPixel( m_cmap );
1193     gdk_gc_set_background( m_brushGC, m_backgroundBrush.GetColour().GetColor() );
1194     gdk_gc_set_background( m_penGC, m_backgroundBrush.GetColour().GetColor() );
1195     gdk_gc_set_background( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1196     gdk_gc_set_foreground( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1197
1198     gdk_gc_set_fill( m_bgGC, GDK_SOLID );
1199
1200     if ((m_backgroundBrush.GetStyle() == wxSTIPPLE) && (m_backgroundBrush.GetStipple()->Ok()))
1201     {
1202         if (m_backgroundBrush.GetStipple()->GetPixmap())
1203         {
1204             gdk_gc_set_fill( m_bgGC, GDK_TILED );
1205             gdk_gc_set_tile( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
1206         }
1207         else
1208         {
1209             gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1210             gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetBitmap() );
1211         }
1212     }
1213
1214     if (IS_HATCH(m_backgroundBrush.GetStyle()))
1215     {
1216         gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1217         int num = m_backgroundBrush.GetStyle() - wxBDIAGONAL_HATCH;
1218         gdk_gc_set_stipple( m_bgGC, hatches[num] );
1219     }
1220 }
1221
1222 void wxWindowDC::SetLogicalFunction( int function )
1223 {
1224     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1225
1226     if (m_logicalFunction == function) return;
1227
1228     GdkFunction mode = GDK_COPY;
1229     switch (function)
1230     {
1231         case wxXOR:          mode = GDK_XOR;           break;
1232         case wxINVERT:       mode = GDK_INVERT;        break;
1233 #if (GTK_MINOR_VERSION > 0)
1234         case wxOR_REVERSE:   mode = GDK_OR_REVERSE;    break;
1235         case wxAND_REVERSE:  mode = GDK_AND_REVERSE;   break;
1236         case wxCLEAR:        mode = GDK_CLEAR;         break;
1237         case wxSET:          mode = GDK_SET;           break;
1238         case wxOR_INVERT:    mode = GDK_OR_INVERT;     break;
1239         case wxSRC_AND:
1240         case wxAND:          mode = GDK_AND;           break;
1241         case wxSRC_OR:
1242         case wxOR:           mode = GDK_OR;            break;
1243         case wxEQUIV:        mode = GDK_EQUIV;         break;
1244         case wxNAND:         mode = GDK_NAND;          break;
1245         case wxAND_INVERT:   mode = GDK_AND_INVERT;    break;
1246         case wxCOPY:         mode = GDK_COPY;          break;
1247         case wxNO_OP:        mode = GDK_NOOP;          break;
1248         case wxSRC_INVERT:   mode = GDK_COPY_INVERT;   break;
1249 #endif
1250         default:
1251         {
1252            wxFAIL_MSG( wxT("unsupported logical function") );
1253            break;
1254         }
1255     }
1256
1257     m_logicalFunction = function;
1258
1259     if (!m_window) return;
1260
1261     gdk_gc_set_function( m_penGC, mode );
1262     gdk_gc_set_function( m_brushGC, mode );
1263     gdk_gc_set_function( m_textGC, mode );
1264 }
1265
1266 void wxWindowDC::SetTextForeground( const wxColour &col )
1267 {
1268     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1269
1270     if (m_textForegroundColour == col) return;
1271
1272     m_textForegroundColour = col;
1273     if (!m_textForegroundColour.Ok()) return;
1274
1275     if (!m_window) return;
1276
1277     m_textForegroundColour.CalcPixel( m_cmap );
1278     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
1279 }
1280
1281 void wxWindowDC::SetTextBackground( const wxColour &col )
1282 {
1283     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1284
1285     if (m_textBackgroundColour == col) return;
1286
1287     m_textBackgroundColour = col;
1288     if (!m_textBackgroundColour.Ok()) return;
1289
1290     if (!m_window) return;
1291
1292     m_textBackgroundColour.CalcPixel( m_cmap );
1293     gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
1294 }
1295
1296 void wxWindowDC::SetBackgroundMode( int mode )
1297 {
1298     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1299
1300     m_backgroundMode = mode;
1301
1302     if (!m_window) return;
1303
1304     // CMB 21/7/98: fill style of cross-hatch brushes is affected by
1305     // transparent/solid background mode
1306
1307     if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
1308     {
1309         gdk_gc_set_fill( m_brushGC,
1310           (m_backgroundMode == wxTRANSPARENT) ? GDK_STIPPLED : GDK_OPAQUE_STIPPLED);
1311     }
1312 }
1313
1314 void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
1315 {
1316     wxFAIL_MSG( wxT("wxWindowDC::SetPalette not implemented") );
1317 }
1318
1319 void wxWindowDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
1320 {
1321     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1322
1323     wxDC::DoSetClippingRegion( x, y, width, height );
1324
1325     if (!m_window) return;
1326
1327     GdkRectangle rect;
1328     rect.x = XLOG2DEV(x);
1329     rect.y = YLOG2DEV(y);
1330     rect.width = XLOG2DEVREL(width);
1331     rect.height = YLOG2DEVREL(height);
1332     gdk_gc_set_clip_rectangle( m_penGC, &rect );
1333     gdk_gc_set_clip_rectangle( m_brushGC, &rect );
1334     gdk_gc_set_clip_rectangle( m_textGC, &rect );
1335     gdk_gc_set_clip_rectangle( m_bgGC, &rect );
1336 }
1337
1338 void wxWindowDC::DoSetClippingRegionAsRegion( const wxRegion &region  )
1339 {
1340     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1341
1342     if (region.Empty())
1343     {
1344         DestroyClippingRegion();
1345         return;
1346     }
1347
1348     if (!m_window) return;
1349
1350     gdk_gc_set_clip_region( m_penGC, region.GetRegion() );
1351     gdk_gc_set_clip_region( m_brushGC, region.GetRegion() );
1352     gdk_gc_set_clip_region( m_textGC, region.GetRegion() );
1353     gdk_gc_set_clip_region( m_bgGC, region.GetRegion() );
1354 }
1355
1356 void wxWindowDC::DestroyClippingRegion()
1357 {
1358     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1359
1360     wxDC::DestroyClippingRegion();
1361
1362     if (!m_window) return;
1363
1364     gdk_gc_set_clip_rectangle( m_penGC, (GdkRectangle *) NULL );
1365     gdk_gc_set_clip_rectangle( m_brushGC, (GdkRectangle *) NULL );
1366     gdk_gc_set_clip_rectangle( m_textGC, (GdkRectangle *) NULL );
1367     gdk_gc_set_clip_rectangle( m_bgGC, (GdkRectangle *) NULL );
1368 }
1369
1370 void wxWindowDC::SetUpDC()
1371 {
1372     Destroy();
1373     m_ok = TRUE;
1374     m_logicalFunction = wxCOPY;
1375     m_penGC = gdk_gc_new( m_window );
1376     m_brushGC = gdk_gc_new( m_window );
1377     m_textGC = gdk_gc_new( m_window );
1378     m_bgGC = gdk_gc_new( m_window );
1379
1380     wxColour tmp_col( m_textForegroundColour );
1381     m_textForegroundColour = wxNullColour;
1382     SetTextForeground( tmp_col );
1383     tmp_col = m_textBackgroundColour;
1384     m_textBackgroundColour = wxNullColour;
1385     SetTextBackground( tmp_col );
1386
1387     wxPen tmp_pen( m_pen );
1388     m_pen = wxNullPen;
1389     SetPen( tmp_pen );
1390
1391     wxFont tmp_font( m_font );
1392     m_font = wxNullFont;
1393     SetFont( tmp_font );
1394
1395     wxBrush tmp_brush( m_brush );
1396     m_brush = wxNullBrush;
1397     SetBrush( tmp_brush );
1398
1399 /*
1400     tmp_brush = m_backgroundBrush;
1401     m_backgroundBrush = wxNullBrush;
1402     SetBackground( tmp_brush );
1403 */
1404     tmp_brush = m_backgroundBrush;
1405     m_backgroundBrush = wxNullBrush;
1406     SetBackground( *wxWHITE_BRUSH );
1407     m_backgroundBrush = tmp_brush;
1408
1409     if (!hatch_bitmap)
1410     {
1411         hatch_bitmap    = hatches;
1412         hatch_bitmap[0] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, bdiag_bits, bdiag_width, bdiag_height );
1413         hatch_bitmap[1] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cdiag_bits, cdiag_width, cdiag_height );
1414         hatch_bitmap[2] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, fdiag_bits, fdiag_width, fdiag_height );
1415         hatch_bitmap[3] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cross_bits, cross_width, cross_height );
1416         hatch_bitmap[4] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, horiz_bits, horiz_width, horiz_height );
1417         hatch_bitmap[5] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, verti_bits, verti_width, verti_height );
1418     }
1419 }
1420
1421 void wxWindowDC::Destroy()
1422 {
1423     if (m_penGC) gdk_gc_unref( m_penGC );
1424     m_penGC = (GdkGC*) NULL;
1425     if (m_brushGC) gdk_gc_unref( m_brushGC );
1426     m_brushGC = (GdkGC*) NULL;
1427     if (m_textGC) gdk_gc_unref( m_textGC );
1428     m_textGC = (GdkGC*) NULL;
1429     if (m_bgGC) gdk_gc_unref( m_bgGC );
1430     m_bgGC = (GdkGC*) NULL;
1431 }
1432
1433 void wxWindowDC::ComputeScaleAndOrigin()
1434 {
1435     /* CMB: copy scale to see if it changes */
1436     double origScaleX = m_scaleX;
1437     double origScaleY = m_scaleY;
1438
1439     wxDC::ComputeScaleAndOrigin();
1440
1441     /* CMB: if scale has changed call SetPen to recalulate the line width */
1442     if ((m_scaleX != origScaleX || m_scaleY != origScaleY) &&
1443         (m_pen.Ok()))
1444     {
1445       /* this is a bit artificial, but we need to force wxDC to think
1446          the pen has changed */
1447       wxPen pen = m_pen;
1448       m_pen = wxNullPen;
1449       SetPen( pen );
1450   }
1451 }
1452
1453 // Resolution in pixels per logical inch
1454 wxSize wxWindowDC::GetPPI() const
1455 {
1456     return wxSize(100, 100);
1457 }
1458
1459 int wxWindowDC::GetDepth() const
1460 {
1461     wxFAIL_MSG(wxT("not implemented"));
1462
1463     return -1;
1464 }
1465
1466 #if wxUSE_SPLINES
1467 // ----------------------------------- spline code ----------------------------------------
1468
1469 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1470                          double a3, double b3, double a4, double b4);
1471 void wx_clear_stack();
1472 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1473         double *y3, double *x4, double *y4);
1474 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1475           double x4, double y4);
1476 static bool wx_spline_add_point(double x, double y);
1477 static void wx_spline_draw_point_array(wxDC *dc);
1478
1479 wxList wx_spline_point_list;
1480
1481 #define                half(z1, z2)        ((z1+z2)/2.0)
1482 #define                THRESHOLD        5
1483
1484 /* iterative version */
1485
1486 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1487                  double b4)
1488 {
1489     register double  xmid, ymid;
1490     double           x1, y1, x2, y2, x3, y3, x4, y4;
1491
1492     wx_clear_stack();
1493     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1494
1495     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1496         xmid = (double)half(x2, x3);
1497         ymid = (double)half(y2, y3);
1498         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1499             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1500             wx_spline_add_point( x1, y1 );
1501             wx_spline_add_point( xmid, ymid );
1502         } else {
1503             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1504                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1505             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1506                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1507         }
1508     }
1509 }
1510
1511 /* utilities used by spline drawing routines */
1512
1513 typedef struct wx_spline_stack_struct {
1514     double           x1, y1, x2, y2, x3, y3, x4, y4;
1515 } Stack;
1516
1517 #define         SPLINE_STACK_DEPTH             20
1518 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1519 static Stack   *wx_stack_top;
1520 static int      wx_stack_count;
1521
1522 void wx_clear_stack()
1523 {
1524     wx_stack_top = wx_spline_stack;
1525     wx_stack_count = 0;
1526 }
1527
1528 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1529 {
1530     wx_stack_top->x1 = x1;
1531     wx_stack_top->y1 = y1;
1532     wx_stack_top->x2 = x2;
1533     wx_stack_top->y2 = y2;
1534     wx_stack_top->x3 = x3;
1535     wx_stack_top->y3 = y3;
1536     wx_stack_top->x4 = x4;
1537     wx_stack_top->y4 = y4;
1538     wx_stack_top++;
1539     wx_stack_count++;
1540 }
1541
1542 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1543                   double *x3, double *y3, double *x4, double *y4)
1544 {
1545     if (wx_stack_count == 0)
1546         return (0);
1547     wx_stack_top--;
1548     wx_stack_count--;
1549     *x1 = wx_stack_top->x1;
1550     *y1 = wx_stack_top->y1;
1551     *x2 = wx_stack_top->x2;
1552     *y2 = wx_stack_top->y2;
1553     *x3 = wx_stack_top->x3;
1554     *y3 = wx_stack_top->y3;
1555     *x4 = wx_stack_top->x4;
1556     *y4 = wx_stack_top->y4;
1557     return (1);
1558 }
1559
1560 static bool wx_spline_add_point(double x, double y)
1561 {
1562   wxPoint *point = new wxPoint ;
1563   point->x = (int) x;
1564   point->y = (int) y;
1565   wx_spline_point_list.Append((wxObject*)point);
1566   return TRUE;
1567 }
1568
1569 static void wx_spline_draw_point_array(wxDC *dc)
1570 {
1571   dc->DrawLines(&wx_spline_point_list, 0, 0 );
1572   wxNode *node = wx_spline_point_list.First();
1573   while (node)
1574   {
1575     wxPoint *point = (wxPoint *)node->Data();
1576     delete point;
1577     delete node;
1578     node = wx_spline_point_list.First();
1579   }
1580 }
1581
1582 void wxWindowDC::DoDrawSpline( wxList *points )
1583 {
1584     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1585
1586     wxPoint *p;
1587     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1588     double           x1, y1, x2, y2;
1589
1590     wxNode *node = points->First();
1591     p = (wxPoint *)node->Data();
1592
1593     x1 = p->x;
1594     y1 = p->y;
1595
1596     node = node->Next();
1597     p = (wxPoint *)node->Data();
1598
1599     x2 = p->x;
1600     y2 = p->y;
1601     cx1 = (double)((x1 + x2) / 2);
1602     cy1 = (double)((y1 + y2) / 2);
1603     cx2 = (double)((cx1 + x2) / 2);
1604     cy2 = (double)((cy1 + y2) / 2);
1605
1606     wx_spline_add_point(x1, y1);
1607
1608     while ((node = node->Next()) != NULL)
1609     {
1610         p = (wxPoint *)node->Data();
1611         x1 = x2;
1612         y1 = y2;
1613         x2 = p->x;
1614         y2 = p->y;
1615         cx4 = (double)(x1 + x2) / 2;
1616         cy4 = (double)(y1 + y2) / 2;
1617         cx3 = (double)(x1 + cx4) / 2;
1618         cy3 = (double)(y1 + cy4) / 2;
1619
1620         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1621
1622         cx1 = cx4;
1623         cy1 = cy4;
1624         cx2 = (double)(cx1 + x2) / 2;
1625         cy2 = (double)(cy1 + y2) / 2;
1626     }
1627
1628     wx_spline_add_point( cx1, cy1 );
1629     wx_spline_add_point( x2, y2 );
1630
1631     wx_spline_draw_point_array( this );
1632 }
1633
1634 #endif // wxUSE_SPLINE
1635
1636 //-----------------------------------------------------------------------------
1637 // wxPaintDC
1638 //-----------------------------------------------------------------------------
1639
1640 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC,wxWindowDC)
1641
1642 wxPaintDC::wxPaintDC()
1643   : wxWindowDC()
1644 {
1645 }
1646
1647 wxPaintDC::wxPaintDC( wxWindow *win )
1648   : wxWindowDC( win )
1649 {
1650 }
1651
1652 //-----------------------------------------------------------------------------
1653 // wxClientDC
1654 //-----------------------------------------------------------------------------
1655
1656 IMPLEMENT_DYNAMIC_CLASS(wxClientDC,wxWindowDC)
1657
1658 wxClientDC::wxClientDC()
1659   : wxWindowDC()
1660 {
1661 }
1662
1663 wxClientDC::wxClientDC( wxWindow *win )
1664   : wxWindowDC( win )
1665 {
1666 }
1667