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     // some controls don't have m_wxwindow - like wxStaticBox, but the user
 130     // code should still be able to create wxClientDCs for them, so we will
 131     // use the parent window here then
 132     if ( !widget )
 133     {
 134         window = window->GetParent();
 135         widget = window->m_wxwindow;
 136     }
 137
 138     wxASSERT_MSG( widget, wxT("DC needs a widget") );
 139
 140     GtkPizza *pizza = GTK_PIZZA( widget );
 141     m_window = pizza->bin_window;
 142
 143     /* not realized ? */
 144     if (!m_window)
 145     {
 146          /* don't report problems */
 147          m_ok = TRUE;
 148
 149          return;
 150     }
 151
 152     m_cmap = gtk_widget_get_colormap( widget ? widget : window->m_widget );
 153
 154     SetUpDC();
 155
 156     /* this must be done after SetUpDC, bacause SetUpDC calls the
 157        repective SetBrush, SetPen, SetBackground etc functions
 158        to set up the DC. SetBackground call m_owner->SetBackground
 159        and this might not be desired as the standard dc background
 160        is white whereas a window might assume gray to be the
 161        standard (as e.g. wxStatusBar) */
 162
 163     m_owner = window;
 164 }
 165
 166 wxWindowDC::~wxWindowDC()
 167 {
 168     Destroy();
 169 }
 170
 171 void wxWindowDC::DoFloodFill( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 172                            const wxColour &WXUNUSED(col), int WXUNUSED(style) )
 173 {
 174     wxFAIL_MSG( wxT("wxWindowDC::DoFloodFill not implemented") );
 175 }
 176
 177 bool wxWindowDC::DoGetPixel( wxCoord WXUNUSED(x1), wxCoord WXUNUSED(y1), wxColour *WXUNUSED(col) ) const
 178 {
 179     wxFAIL_MSG( wxT("wxWindowDC::DoGetPixel not implemented") );
 180     return FALSE;
 181 }
 182
 183 void wxWindowDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 184 {
 185     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 186
 187     if (m_pen.GetStyle() != wxTRANSPARENT)
 188     {
 189         if (m_window)
 190             gdk_draw_line( m_window, m_penGC, XLOG2DEV(x1), YLOG2DEV(y1), XLOG2DEV(x2), YLOG2DEV(y2) );
 191
 192         CalcBoundingBox(x1, y1);
 193         CalcBoundingBox(x2, y2);
 194     }
 195 }
 196
 197 void wxWindowDC::DoCrossHair( wxCoord x, wxCoord y )
 198 {
 199     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 200
 201     if (m_pen.GetStyle() != wxTRANSPARENT)
 202     {
 203         int w = 0;
 204         int h = 0;
 205         GetSize( &w, &h );
 206         wxCoord xx = XLOG2DEV(x);
 207         wxCoord yy = YLOG2DEV(y);
 208         if (m_window)
 209         {
 210             gdk_draw_line( m_window, m_penGC, 0, yy, XLOG2DEVREL(w), yy );
 211             gdk_draw_line( m_window, m_penGC, xx, 0, xx, YLOG2DEVREL(h) );
 212         }
 213     }
 214 }
 215
 216 void wxWindowDC::DoDrawArc( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2,
 217                             wxCoord xc, wxCoord yc )
 218 {
 219     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 220
 221     wxCoord xx1 = XLOG2DEV(x1);
 222     wxCoord yy1 = YLOG2DEV(y1);
 223     wxCoord xx2 = XLOG2DEV(x2);
 224     wxCoord yy2 = YLOG2DEV(y2);
 225     wxCoord xxc = XLOG2DEV(xc);
 226     wxCoord yyc = YLOG2DEV(yc);
 227     double dx = xx1 - xxc;
 228     double dy = yy1 - yyc;
 229     double radius = sqrt((double)(dx*dx+dy*dy));
 230     wxCoord   r      = (wxCoord)radius;
 231     double radius1, radius2;
 232
 233     if (xx1 == xx2 && yy1 == yy2)
 234     {
 235         radius1 = 0.0;
 236         radius2 = 360.0;
 237     }
 238     else
 239     if (radius == 0.0)
 240     {
 241         radius1 = radius2 = 0.0;
 242     }
 243     else
 244     {
 245         radius1 = (xx1 - xxc == 0) ?
 246             (yy1 - yyc < 0) ? 90.0 : -90.0 :
 247             -atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
 248         radius2 = (xx2 - xxc == 0) ?
 249             (yy2 - yyc < 0) ? 90.0 : -90.0 :
 250             -atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
 251     }
 252     wxCoord alpha1 = wxCoord(radius1 * 64.0);
 253     wxCoord alpha2 = wxCoord((radius2 - radius1) * 64.0);
 254     while (alpha2 <= 0) alpha2 += 360*64;
 255     while (alpha1 > 360*64) alpha1 -= 360*64;
 256
 257     if (m_window)
 258     {
 259         if (m_brush.GetStyle() != wxTRANSPARENT)
 260             gdk_draw_arc( m_window, m_brushGC, TRUE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 261
 262         if (m_pen.GetStyle() != wxTRANSPARENT)
 263             gdk_draw_arc( m_window, m_penGC, FALSE, xxc-r, yyc-r, 2*r,2*r, alpha1, alpha2 );
 264     }
 265
 266     CalcBoundingBox (x1, y1);
 267     CalcBoundingBox (x2, y2);
 268 }
 269
 270 void wxWindowDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double sa, double ea )
 271 {
 272     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 273
 274     wxCoord xx = XLOG2DEV(x);
 275     wxCoord yy = YLOG2DEV(y);
 276     wxCoord ww = m_signX * XLOG2DEVREL(width);
 277     wxCoord hh = m_signY * YLOG2DEVREL(height);
 278
 279     // CMB: handle -ve width and/or height
 280     if (ww < 0) { ww = -ww; xx = xx - ww; }
 281     if (hh < 0) { hh = -hh; yy = yy - hh; }
 282
 283     if (m_window)
 284     {
 285         wxCoord start = wxCoord(sa * 64.0);
 286         wxCoord end = wxCoord(ea * 64.0);
 287
 288         if (m_brush.GetStyle() != wxTRANSPARENT)
 289             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, start, end );
 290
 291         if (m_pen.GetStyle() != wxTRANSPARENT)
 292             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, start, end );
 293     }
 294
 295     CalcBoundingBox (x, y);
 296     CalcBoundingBox (x + width, y + height);
 297 }
 298
 299 void wxWindowDC::DoDrawPoint( wxCoord x, wxCoord y )
 300 {
 301     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 302
 303     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 304         gdk_draw_point( m_window, m_penGC, XLOG2DEV(x), YLOG2DEV(y) );
 305
 306     CalcBoundingBox (x, y);
 307 }
 308
 309 void wxWindowDC::DoDrawLines( int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset )
 310 {
 311     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 312
 313     if (m_pen.GetStyle() == wxTRANSPARENT) return;
 314     if (n <= 0) return;
 315
 316     CalcBoundingBox( points[0].x + xoffset, points[0].y + yoffset );
 317
 318     for (int i = 0; i < n-1; i++)
 319     {
 320         wxCoord x1 = XLOG2DEV(points[i].x + xoffset);
 321         wxCoord x2 = XLOG2DEV(points[i+1].x + xoffset);
 322         wxCoord y1 = YLOG2DEV(points[i].y + yoffset);     // oh, what a waste
 323         wxCoord y2 = YLOG2DEV(points[i+1].y + yoffset);
 324
 325         if (m_window)
 326             gdk_draw_line( m_window, m_penGC, x1, y1, x2, y2 );
 327
 328         CalcBoundingBox( points[i+1].x + xoffset, points[i+1].y + yoffset );
 329     }
 330 }
 331
 332 void wxWindowDC::DoDrawPolygon( int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset, int WXUNUSED(fillStyle) )
 333 {
 334     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 335
 336     if (n <= 0) return;
 337
 338     GdkPoint *gdkpoints = new GdkPoint[n+1];
 339     int i;
 340     for (i = 0 ; i < n ; i++)
 341     {
 342         gdkpoints[i].x = XLOG2DEV(points[i].x + xoffset);
 343         gdkpoints[i].y = YLOG2DEV(points[i].y + yoffset);
 344
 345         CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset );
 346     }
 347
 348     if (m_window)
 349     {
 350         if ((m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE) && (m_brush.GetStipple()->GetMask()))
 351             gdk_draw_polygon (m_window, m_textGC, TRUE, gdkpoints, n);
 352         else
 353         {
 354             if ((m_brush.GetStyle() != wxTRANSPARENT))
 355                 gdk_draw_polygon (m_window, m_brushGC, TRUE, gdkpoints, n);
 356         }
 357     }
 358
 359     // To do: Fillstyle
 360
 361     if ((m_pen.GetStyle() != wxTRANSPARENT) && m_window)
 362     {
 363         for (i = 0 ; i < n ; i++)
 364         {
 365             gdk_draw_line( m_window, m_penGC,
 366                            gdkpoints[i%n].x,
 367                            gdkpoints[i%n].y,
 368                            gdkpoints[(i+1)%n].x,
 369                            gdkpoints[(i+1)%n].y);
 370         }
 371     }
 372
 373     delete[] gdkpoints;
 374 }
 375
 376 void wxWindowDC::DoDrawRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 377 {
 378     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 379
 380     wxCoord xx = XLOG2DEV(x);
 381     wxCoord yy = YLOG2DEV(y);
 382     wxCoord ww = m_signX * XLOG2DEVREL(width);
 383     wxCoord hh = m_signY * YLOG2DEVREL(height);
 384
 385     // CMB: draw nothing if transformed w or h is 0
 386     if (ww == 0 || hh == 0) return;
 387
 388     // CMB: handle -ve width and/or height
 389     if (ww < 0) { ww = -ww; xx = xx - ww; }
 390     if (hh < 0) { hh = -hh; yy = yy - hh; }
 391
 392     if (m_window)
 393     {
 394         if ((m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE) && (m_brush.GetStipple()->GetMask()))
 395         {
 396             gdk_draw_rectangle( m_window, m_textGC, TRUE, xx, yy, ww, hh );
 397             gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 398         }
 399         else
 400         {
 401             if (m_brush.GetStyle() != wxTRANSPARENT)
 402                 gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy, ww, hh );
 403
 404             if (m_pen.GetStyle() != wxTRANSPARENT)
 405                 gdk_draw_rectangle( m_window, m_penGC, FALSE, xx, yy, ww-1, hh-1 );
 406         }
 407     }
 408
 409     CalcBoundingBox( x, y );
 410     CalcBoundingBox( x + width, y + height );
 411 }
 412
 413 void wxWindowDC::DoDrawRoundedRectangle( wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
 414 {
 415     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 416
 417     if (radius < 0.0) radius = - radius * ((width < height) ? width : height);
 418
 419     wxCoord xx = XLOG2DEV(x);
 420     wxCoord yy = YLOG2DEV(y);
 421     wxCoord ww = m_signX * XLOG2DEVREL(width);
 422     wxCoord hh = m_signY * YLOG2DEVREL(height);
 423     wxCoord rr = XLOG2DEVREL((wxCoord)radius);
 424
 425     // CMB: handle -ve width and/or height
 426     if (ww < 0) { ww = -ww; xx = xx - ww; }
 427     if (hh < 0) { hh = -hh; yy = yy - hh; }
 428
 429     // CMB: if radius is zero use DrawRectangle() instead to avoid
 430     // X drawing errors with small radii
 431     if (rr == 0)
 432     {
 433         DrawRectangle( x, y, width, height );
 434         return;
 435     }
 436
 437     // CMB: draw nothing if transformed w or h is 0
 438     if (ww == 0 || hh == 0) return;
 439
 440     // CMB: adjust size if outline is drawn otherwise the result is
 441     // 1 pixel too wide and high
 442     if (m_pen.GetStyle() != wxTRANSPARENT)
 443     {
 444         ww--;
 445         hh--;
 446     }
 447
 448     if (m_window)
 449     {
 450         // CMB: ensure dd is not larger than rectangle otherwise we
 451         // get an hour glass shape
 452         wxCoord dd = 2 * rr;
 453         if (dd > ww) dd = ww;
 454         if (dd > hh) dd = hh;
 455         rr = dd / 2;
 456
 457         if (m_brush.GetStyle() != wxTRANSPARENT)
 458         {
 459             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx+rr, yy, ww-dd+1, hh );
 460             gdk_draw_rectangle( m_window, m_brushGC, TRUE, xx, yy+rr, ww, hh-dd+1 );
 461             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, dd, dd, 90*64, 90*64 );
 462             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 463             gdk_draw_arc( m_window, m_brushGC, TRUE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 464             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 465         }
 466
 467         if (m_pen.GetStyle() != wxTRANSPARENT)
 468         {
 469             gdk_draw_line( m_window, m_penGC, xx+rr, yy, xx+ww-rr, yy );
 470             gdk_draw_line( m_window, m_penGC, xx+rr, yy+hh, xx+ww-rr, yy+hh );
 471             gdk_draw_line( m_window, m_penGC, xx, yy+rr, xx, yy+hh-rr );
 472             gdk_draw_line( m_window, m_penGC, xx+ww, yy+rr, xx+ww, yy+hh-rr );
 473             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, dd, dd, 90*64, 90*64 );
 474             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy, dd, dd, 0, 90*64 );
 475             gdk_draw_arc( m_window, m_penGC, FALSE, xx+ww-dd, yy+hh-dd, dd, dd, 270*64, 90*64 );
 476             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy+hh-dd, dd, dd, 180*64, 90*64 );
 477         }
 478     }
 479
 480     // this ignores the radius
 481     CalcBoundingBox( x, y );
 482     CalcBoundingBox( x + width, y + height );
 483 }
 484
 485 void wxWindowDC::DoDrawEllipse( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 486 {
 487     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 488
 489     wxCoord xx = XLOG2DEV(x);
 490     wxCoord yy = YLOG2DEV(y);
 491     wxCoord ww = m_signX * XLOG2DEVREL(width);
 492     wxCoord hh = m_signY * YLOG2DEVREL(height);
 493
 494     // CMB: handle -ve width and/or height
 495     if (ww < 0) { ww = -ww; xx = xx - ww; }
 496     if (hh < 0) { hh = -hh; yy = yy - hh; }
 497
 498     if (m_window)
 499     {
 500         if (m_brush.GetStyle() != wxTRANSPARENT)
 501             gdk_draw_arc( m_window, m_brushGC, TRUE, xx, yy, ww, hh, 0, 360*64 );
 502
 503         if (m_pen.GetStyle() != wxTRANSPARENT)
 504             gdk_draw_arc( m_window, m_penGC, FALSE, xx, yy, ww, hh, 0, 360*64 );
 505     }
 506
 507     CalcBoundingBox( x - width, y - height );
 508     CalcBoundingBox( x + width, y + height );
 509 }
 510
 511 void wxWindowDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
 512 {
 513     // VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
 514     DoDrawBitmap( (const wxBitmap&)icon, x, y, (bool)TRUE );
 515 }
 516
 517 void wxWindowDC::DoDrawBitmap( const wxBitmap &bitmap,
 518                                wxCoord x, wxCoord y,
 519                                bool useMask )
 520 {
 521     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 522
 523     wxCHECK_RET( bitmap.Ok(), wxT("invalid bitmap") );
 524
 525     bool is_mono = (bitmap.GetBitmap() != NULL);
 526
 527     /* scale/translate size and position */
 528
 529     int xx = XLOG2DEV(x);
 530     int yy = YLOG2DEV(y);
 531
 532     int w = bitmap.GetWidth();
 533     int h = bitmap.GetHeight();
 534
 535     CalcBoundingBox( x, y );
 536     CalcBoundingBox( x + w, y + h );
 537
 538     if (!m_window) return;
 539
 540     int ww = XLOG2DEVREL(w);
 541     int hh = YLOG2DEVREL(h);
 542
 543     /* scale bitmap if required */
 544
 545     wxBitmap use_bitmap;
 546
 547     if ((w != ww) || (h != hh))
 548     {
 549         wxImage image( bitmap );
 550         image.Rescale( ww, hh );
 551         if (is_mono)
 552             use_bitmap = image.ConvertToMonoBitmap(255,255,255);
 553         else
 554             use_bitmap = image.ConvertToBitmap();
 555     }
 556     else
 557     {
 558         use_bitmap = bitmap;
 559     }
 560
 561     /* apply mask if any */
 562
 563     GdkBitmap *mask = (GdkBitmap *) NULL;
 564     if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 565
 566     if (useMask && mask)
 567     {
 568         if (is_mono)
 569         {
 570             gdk_gc_set_clip_mask( m_textGC, mask );
 571             gdk_gc_set_clip_origin( m_textGC, xx, yy );
 572         }
 573         else
 574         {
 575             gdk_gc_set_clip_mask( m_penGC, mask );
 576             gdk_gc_set_clip_origin( m_penGC, xx, yy );
 577         }
 578     }
 579
 580     /* Draw XPixmap or XBitmap, depending on what the wxBitmap contains. For
 581        drawing a mono-bitmap (XBitmap) we use the current text GC */
 582     if (is_mono)
 583         gdk_draw_bitmap( m_window, m_textGC, use_bitmap.GetBitmap(), 0, 0, xx, yy, -1, -1 );
 584     else
 585         gdk_draw_pixmap( m_window, m_penGC, use_bitmap.GetPixmap(), 0, 0, xx, yy, -1, -1 );
 586
 587     /* remove mask again if any */
 588
 589     if (useMask && mask)
 590     {
 591         if (is_mono)
 592         {
 593             gdk_gc_set_clip_mask( m_textGC, (GdkBitmap *) NULL );
 594             gdk_gc_set_clip_origin( m_textGC, 0, 0 );
 595         }
 596         else
 597         {
 598             gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 599             gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 600         }
 601     }
 602 }
 603
 604 bool wxWindowDC::DoBlit( wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 605                          wxDC *source, wxCoord xsrc, wxCoord ysrc,
 606                          int logical_func, bool useMask )
 607 {
 608    /* this is the nth try to get this utterly useless function to
 609       work. it now completely ignores the scaling or translation
 610       of the source dc, but scales correctly on the target dc and
 611       knows about possible mask information in a memory dc. */
 612
 613     wxCHECK_MSG( Ok(), FALSE, wxT("invalid window dc") );
 614
 615     wxCHECK_MSG( source, FALSE, wxT("invalid source dc") );
 616
 617     if (!m_window) return FALSE;
 618
 619     wxClientDC *srcDC = (wxClientDC*)source;
 620     wxMemoryDC *memDC = (wxMemoryDC*)source;
 621
 622     bool use_bitmap_method = FALSE;
 623     bool is_mono = FALSE;
 624
 625     if (srcDC->m_isMemDC)
 626     {
 627         if (!memDC->m_selected.Ok()) return FALSE;
 628
 629         /* we use the "XCopyArea" way to copy a memory dc into
 630            y different window if the memory dc BOTH
 631            a) doesn't have any mask or its mask isn't used
 632            b) it is clipped
 633            c) is not 1-bit */
 634
 635         if (useMask && (memDC->m_selected.GetMask()))
 636         {
 637            /* we HAVE TO use the direct way for memory dcs
 638               that have mask since the XCopyArea doesn't know
 639               about masks */
 640             use_bitmap_method = TRUE;
 641         }
 642         else if (memDC->m_selected.GetDepth() == 1)
 643         {
 644            /* we HAVE TO use the direct way for memory dcs
 645               that are bitmaps because XCopyArea doesn't cope
 646               with different bit depths */
 647             is_mono = TRUE;
 648             use_bitmap_method = TRUE;
 649         }
 650         else if ((xsrc == 0) && (ysrc == 0) &&
 651                  (width == memDC->m_selected.GetWidth()) &&
 652                  (height == memDC->m_selected.GetHeight()))
 653         {
 654            /* we SHOULD use the direct way if all of the bitmap
 655               in the memory dc is copied in which case XCopyArea
 656               wouldn't be able able to boost performace by reducing
 657               the area to be scaled */
 658             use_bitmap_method = TRUE;
 659         }
 660         else
 661         {
 662             use_bitmap_method = FALSE;
 663         }
 664     }
 665
 666     CalcBoundingBox( xdest, ydest );
 667     CalcBoundingBox( xdest + width, ydest + height );
 668
 669     int old_logical_func = m_logicalFunction;
 670     SetLogicalFunction( logical_func );
 671
 672     if (use_bitmap_method)
 673     {
 674         /* scale/translate bitmap size */
 675
 676         wxCoord bm_width = memDC->m_selected.GetWidth();
 677         wxCoord bm_height = memDC->m_selected.GetHeight();
 678
 679         wxCoord bm_ww = XLOG2DEVREL( bm_width );
 680         wxCoord bm_hh = YLOG2DEVREL( bm_height );
 681
 682         /* scale bitmap if required */
 683
 684         wxBitmap use_bitmap;
 685
 686         if ((bm_width != bm_ww) || (bm_height != bm_hh))
 687         {
 688             wxImage image( memDC->m_selected );
 689             image = image.Scale( bm_ww, bm_hh );
 690
 691             if (is_mono)
 692                 use_bitmap = image.ConvertToMonoBitmap(255,255,255);
 693             else
 694                 use_bitmap = image.ConvertToBitmap();
 695         }
 696         else
 697         {
 698             use_bitmap = memDC->m_selected;
 699         }
 700
 701         /* scale/translate size and position */
 702
 703         wxCoord xx = XLOG2DEV(xdest);
 704         wxCoord yy = YLOG2DEV(ydest);
 705
 706         wxCoord ww = XLOG2DEVREL(width);
 707         wxCoord hh = YLOG2DEVREL(height);
 708
 709         /* apply mask if any */
 710
 711         GdkBitmap *mask = (GdkBitmap *) NULL;
 712         if (use_bitmap.GetMask()) mask = use_bitmap.GetMask()->GetBitmap();
 713
 714         if (useMask && mask)
 715         {
 716             if (is_mono)
 717             {
 718                 gdk_gc_set_clip_mask( m_textGC, mask );
 719                 gdk_gc_set_clip_origin( m_textGC, xx, yy );
 720             }
 721             else
 722             {
 723                 gdk_gc_set_clip_mask( m_penGC, mask );
 724                 gdk_gc_set_clip_origin( m_penGC, xx, yy );
 725             }
 726         }
 727
 728         /* Draw XPixmap or XBitmap, depending on what the wxBitmap contains. For
 729            drawing a mono-bitmap (XBitmap) we use the current text GC */
 730         if (is_mono)
 731             gdk_draw_bitmap( m_window, m_textGC, use_bitmap.GetBitmap(), xsrc, ysrc, xx, yy, ww, hh );
 732         else
 733             gdk_draw_pixmap( m_window, m_penGC, use_bitmap.GetPixmap(), xsrc, ysrc, xx, yy, ww, hh );
 734
 735         /* remove mask again if any */
 736
 737         if (useMask && mask)
 738         {
 739             if (is_mono)
 740             {
 741                 gdk_gc_set_clip_mask( m_textGC, (GdkBitmap *) NULL );
 742                 gdk_gc_set_clip_origin( m_textGC, 0, 0 );
 743             }
 744             else
 745             {
 746                 gdk_gc_set_clip_mask( m_penGC, (GdkBitmap *) NULL );
 747                 gdk_gc_set_clip_origin( m_penGC, 0, 0 );
 748             }
 749         }
 750     }
 751     else /* use_bitmap_method */
 752     {
 753         /* scale/translate size and position */
 754
 755         wxCoord xx = XLOG2DEV(xdest);
 756         wxCoord yy = YLOG2DEV(ydest);
 757
 758         wxCoord ww = XLOG2DEVREL(width);
 759         wxCoord hh = YLOG2DEVREL(height);
 760
 761         if ((width != ww) || (height != hh))
 762         {
 763             /* draw source window into a bitmap as we cannot scale
 764                a window in contrast to a bitmap. this would actually
 765                work with memory dcs as well, but we'd lose the mask
 766                information and waste one step in this process since
 767                a memory already has a bitmap. all this is slightly
 768                inefficient as we could take an XImage directly from
 769                an X window, but we'd then also have to care that
 770                the window is not outside the screen (in which case
 771                we'd get a BadMatch or what not).
 772                Is a double XGetImage and combined XGetPixel and
 773                XPutPixel really faster? I'm not sure. look at wxXt
 774                for a different implementation of the same problem. */
 775
 776             wxBitmap bitmap( width, height );
 777             gdk_window_copy_area( bitmap.GetPixmap(), m_penGC, 0, 0,
 778                                   srcDC->GetWindow(),
 779                                   xsrc, ysrc, width, height );
 780
 781             /* scale image */
 782
 783             wxImage image( bitmap );
 784             image = image.Scale( ww, hh );
 785
 786             /* convert to bitmap */
 787
 788             bitmap = image.ConvertToBitmap();
 789
 790             /* draw scaled bitmap */
 791
 792             gdk_draw_pixmap( m_window, m_penGC, bitmap.GetPixmap(), 0, 0, xx, yy, -1, -1 );
 793
 794         }
 795         else
 796         {
 797             /* no scaling and not a memory dc with a mask either */
 798
 799             gdk_window_copy_area( m_window, m_penGC, xx, yy,
 800                                   srcDC->GetWindow(),
 801                                   xsrc, ysrc, width, height );
 802         }
 803     }
 804
 805     SetLogicalFunction( old_logical_func );
 806     return TRUE;
 807 }
 808
 809 void wxWindowDC::DoDrawText( const wxString &text, wxCoord x, wxCoord y )
 810 {
 811     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 812
 813     if (!m_window) return;
 814
 815     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 816
 817     wxCHECK_RET( font, wxT("invalid font") );
 818
 819     x = XLOG2DEV(x);
 820     y = YLOG2DEV(y);
 821
 822     /* CMB 21/5/98: draw text background if mode is wxSOLID */
 823     if (m_backgroundMode == wxSOLID)
 824     {
 825         wxCoord width = gdk_string_width( font, text.mbc_str() );
 826         wxCoord height = font->ascent + font->descent;
 827         gdk_gc_set_foreground( m_textGC, m_textBackgroundColour.GetColor() );
 828         gdk_draw_rectangle( m_window, m_textGC, TRUE, x, y, width, height );
 829         gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
 830     }
 831     gdk_draw_string( m_window, font, m_textGC, x, y + font->ascent, text.mbc_str() );
 832
 833     /* CMB 17/7/98: simple underline: ignores scaling and underlying
 834        X font's XA_UNDERLINE_POSITION and XA_UNDERLINE_THICKNESS
 835        properties (see wxXt implementation) */
 836     if (m_font.GetUnderlined())
 837     {
 838         wxCoord width = gdk_string_width( font, text.mbc_str() );
 839         wxCoord ul_y = y + font->ascent;
 840         if (font->descent > 0) ul_y++;
 841         gdk_draw_line( m_window, m_textGC, x, ul_y, x + width, ul_y);
 842     }
 843
 844     wxCoord w, h;
 845     GetTextExtent (text, &w, &h);
 846     CalcBoundingBox (x + w, y + h);
 847     CalcBoundingBox (x, y);
 848 }
 849
 850 void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y, double angle )
 851 {
 852     if (angle == 0.0)
 853     {
 854         DrawText(text, x, y);
 855         return;
 856     }
 857
 858     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 859
 860     if (!m_window) return;
 861
 862     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 863
 864     wxCHECK_RET( font, wxT("invalid font") );
 865
 866     // the size of the text
 867     wxCoord w = gdk_string_width( font, text.mbc_str() );
 868     wxCoord h = font->ascent + font->descent;
 869
 870     // draw the string normally
 871     wxBitmap src(w, h);
 872     wxMemoryDC dc;
 873     dc.SelectObject(src);
 874     dc.SetFont(GetFont());
 875     dc.SetBackground(*wxWHITE_BRUSH);
 876     dc.SetBrush(*wxBLACK_BRUSH);
 877     dc.Clear();
 878     dc.DrawText(text, 0, 0);
 879     dc.SetFont(wxNullFont);
 880     dc.SelectObject(wxNullBitmap);
 881
 882     // Calculate the size of the rotated bounding box.
 883     double rad = DegToRad(angle);
 884     double dx = cos(rad),
 885            dy = sin(rad);
 886
 887     // the rectngle vertices are counted clockwise with the first one being at
 888     // (0, 0) (or, rather, at (x, y))
 889     double x2 = w*dx,
 890            y2 = -w*dy;      // y axis points to the bottom, hence minus
 891     double x4 = h*dy,
 892            y4 = h*dx;
 893     double x3 = x4 + x2,
 894            y3 = y4 + y2;
 895
 896     // calc max and min
 897     wxCoord maxX = (wxCoord)(dmax(x2, dmax(x3, x4)) + 0.5),
 898             maxY = (wxCoord)(dmax(y2, dmax(y3, y4)) + 0.5),
 899             minX = (wxCoord)(dmin(x2, dmin(x3, x4)) - 0.5),
 900             minY = (wxCoord)(dmin(y2, dmin(y3, y4)) - 0.5);
 901
 902     // prepare to blit-with-rotate the bitmap to the DC
 903     wxImage image(src);
 904
 905     GdkColor *colText = m_textForegroundColour.GetColor(),
 906              *colBack = m_textBackgroundColour.GetColor();
 907
 908     bool textColSet = TRUE;
 909
 910     unsigned char *data = image.GetData();
 911
 912     // paint pixel by pixel
 913     for ( wxCoord srcX = 0; srcX < w; srcX++ )
 914     {
 915         for ( wxCoord srcY = 0; srcY < h; srcY++ )
 916         {
 917             // transform source coords to dest coords
 918             double r = sqrt(srcX*srcX + srcY*srcY);
 919             double angleOrig = atan2(srcY, srcX) - rad;
 920             wxCoord dstX = (wxCoord)(r*cos(angleOrig) + 0.5),
 921                     dstY = (wxCoord)(r*sin(angleOrig) + 0.5);
 922
 923             // black pixel?
 924             bool textPixel = data[(srcY*w + srcX)*3] == 0;
 925             if ( textPixel || (m_backgroundMode == wxSOLID) )
 926             {
 927                 // change colour if needed
 928                 if ( textPixel != textColSet )
 929                 {
 930                     gdk_gc_set_foreground( m_textGC, textPixel ? colText
 931                                                                : colBack );
 932
 933                     textColSet = textPixel;
 934                 }
 935
 936                 // don't use DrawPoint() because it uses the current pen
 937                 // colour, and we don't need it here
 938                 gdk_draw_point( m_window, m_textGC,
 939                                 XLOG2DEV(x + dstX), YLOG2DEV(y + dstY) );
 940             }
 941         }
 942     }
 943
 944     // it would be better to draw with non underlined font and draw the line
 945     // manually here (it would be more straight...)
 946 #if 0
 947     if ( m_font.GetUnderlined() )
 948     {
 949         gdk_draw_line( m_window, m_textGC,
 950                        XLOG2DEV(x + x4), YLOG2DEV(y + y4 + font->descent),
 951                        XLOG2DEV(x + x3), YLOG2DEV(y + y3 + font->descent));
 952     }
 953 #endif // 0
 954
 955     // restore the font colour
 956     gdk_gc_set_foreground( m_textGC, colText );
 957
 958     // update the bounding box
 959     CalcBoundingBox(x + minX, y + minY);
 960     CalcBoundingBox(x + maxX, y + maxY);
 961 }
 962
 963 void wxWindowDC::DoGetTextExtent(const wxString &string,
 964                                  wxCoord *width, wxCoord *height,
 965                                  wxCoord *descent, wxCoord *externalLeading,
 966                                  wxFont *theFont) const
 967 {
 968     wxFont fontToUse = m_font;
 969     if (theFont) fontToUse = *theFont;
 970
 971     GdkFont *font = fontToUse.GetInternalFont( m_scaleY );
 972     if (width) (*width) = wxCoord(gdk_string_width( font, string.mbc_str() ) / m_scaleX);
 973     if (height) (*height) = wxCoord((font->ascent + font->descent) / m_scaleY);
 974     if (descent) (*descent) = wxCoord(font->descent / m_scaleY);
 975     if (externalLeading) (*externalLeading) = 0;  // ??
 976 }
 977
 978 wxCoord wxWindowDC::GetCharWidth() const
 979 {
 980     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 981     wxCHECK_MSG( font, -1, wxT("invalid font") );
 982
 983     return wxCoord(gdk_string_width( font, "H" ) / m_scaleX);
 984 }
 985
 986 wxCoord wxWindowDC::GetCharHeight() const
 987 {
 988     GdkFont *font = m_font.GetInternalFont( m_scaleY );
 989     wxCHECK_MSG( font, -1, wxT("invalid font") );
 990
 991     return wxCoord((font->ascent + font->descent) / m_scaleY);
 992 }
 993
 994 void wxWindowDC::Clear()
 995 {
 996     wxCHECK_RET( Ok(), wxT("invalid window dc") );
 997
 998     if (!m_window) return;
 999
1000     /* - we either are a memory dc or have a window as the
1001        owner. anything else shouldn't happen.
1002        - we don't use gdk_window_clear() as we don't set
1003        the window's background colour anymore. it is too
1004        much pain to keep the DC's and the window's back-
1005        ground colour in synch. */
1006
1007     if (m_owner)
1008     {
1009         int width,height;
1010         m_owner->GetSize( &width, &height );
1011         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
1012         return;
1013     }
1014
1015     if (m_isMemDC)
1016     {
1017         int width,height;
1018         GetSize( &width, &height );
1019         gdk_draw_rectangle( m_window, m_bgGC, TRUE, 0, 0, width, height );
1020         return;
1021     }
1022 }
1023
1024 void wxWindowDC::SetFont( const wxFont &font )
1025 {
1026     m_font = font;
1027 }
1028
1029 void wxWindowDC::SetPen( const wxPen &pen )
1030 {
1031     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1032
1033     if (m_pen == pen) return;
1034
1035     m_pen = pen;
1036
1037     if (!m_pen.Ok()) return;
1038
1039     if (!m_window) return;
1040
1041     gint width = m_pen.GetWidth();
1042     if (width <= 0)
1043     {
1044         // CMB: if width is non-zero scale it with the dc
1045         width = 1;
1046     }
1047     else
1048     {
1049         // X doesn't allow different width in x and y and so we take
1050         // the average
1051         double w = 0.5 +
1052                    ( fabs((double) XLOG2DEVREL(width)) +
1053                      fabs((double) YLOG2DEVREL(width)) ) / 2.0;
1054         width = (int)w;
1055     }
1056
1057     static const char dotted[] = {1, 1};
1058     static const char short_dashed[] = {2, 2};
1059     static const char wxCoord_dashed[] = {2, 4};
1060     static const char dotted_dashed[] = {3, 3, 1, 3};
1061
1062     // We express dash pattern in pen width unit, so we are
1063     // independent of zoom factor and so on...
1064     int req_nb_dash;
1065     const char *req_dash;
1066
1067     GdkLineStyle lineStyle = GDK_LINE_SOLID;
1068     switch (m_pen.GetStyle())
1069     {
1070         case wxUSER_DASH:
1071         {
1072             lineStyle = GDK_LINE_ON_OFF_DASH;
1073             req_nb_dash = m_pen.GetDashCount();
1074             req_dash = m_pen.GetDash();
1075             break;
1076         }
1077         case wxDOT:
1078         {
1079             lineStyle = GDK_LINE_ON_OFF_DASH;
1080             req_nb_dash = 2;
1081             req_dash = dotted;
1082             break;
1083         }
1084         case wxLONG_DASH:
1085         {
1086             lineStyle = GDK_LINE_ON_OFF_DASH;
1087             req_nb_dash = 2;
1088             req_dash = wxCoord_dashed;
1089             break;
1090         }
1091         case wxSHORT_DASH:
1092         {
1093             lineStyle = GDK_LINE_ON_OFF_DASH;
1094             req_nb_dash = 2;
1095             req_dash = short_dashed;
1096             break;
1097         }
1098         case wxDOT_DASH:
1099         {
1100 //            lineStyle = GDK_LINE_DOUBLE_DASH;
1101             lineStyle = GDK_LINE_ON_OFF_DASH;
1102             req_nb_dash = 4;
1103             req_dash = dotted_dashed;
1104             break;
1105         }
1106
1107         case wxTRANSPARENT:
1108         case wxSTIPPLE_MASK_OPAQUE:
1109         case wxSTIPPLE:
1110         case wxSOLID:
1111         default:
1112         {
1113             lineStyle = GDK_LINE_SOLID;
1114             req_dash = (wxDash*)NULL;
1115             req_nb_dash = 0;
1116             break;
1117         }
1118     }
1119
1120 #if (GTK_MINOR_VERSION > 0)
1121     if (req_dash && req_nb_dash)
1122     {
1123         char *real_req_dash = new char[req_nb_dash];
1124         if (real_req_dash)
1125         {
1126             for (int i = 0; i < req_nb_dash; i++)
1127                 real_req_dash[i] = req_dash[i] * width;
1128             gdk_gc_set_dashes( m_penGC, 0, real_req_dash, req_nb_dash );
1129             delete[] real_req_dash;
1130         }
1131         else
1132         {
1133             // No Memory. We use non-scaled dash pattern...
1134             gdk_gc_set_dashes( m_penGC, 0, (char*)req_dash, req_nb_dash );
1135         }
1136     }
1137 #endif
1138
1139     GdkCapStyle capStyle = GDK_CAP_ROUND;
1140     switch (m_pen.GetCap())
1141     {
1142         case wxCAP_PROJECTING: { capStyle = GDK_CAP_PROJECTING; break; }
1143         case wxCAP_BUTT:       { capStyle = GDK_CAP_BUTT;       break; }
1144         case wxCAP_ROUND:
1145         default:
1146         {
1147             if (width <= 1)
1148             {
1149                 width = 0;
1150                 capStyle = GDK_CAP_NOT_LAST;
1151             }
1152             else
1153             {
1154                 capStyle = GDK_CAP_ROUND;
1155             }
1156             break;
1157         }
1158     }
1159
1160     GdkJoinStyle joinStyle = GDK_JOIN_ROUND;
1161     switch (m_pen.GetJoin())
1162     {
1163         case wxJOIN_BEVEL: { joinStyle = GDK_JOIN_BEVEL; break; }
1164         case wxJOIN_MITER: { joinStyle = GDK_JOIN_MITER; break; }
1165         case wxJOIN_ROUND:
1166         default:           { joinStyle = GDK_JOIN_ROUND; break; }
1167     }
1168
1169     gdk_gc_set_line_attributes( m_penGC, width, lineStyle, capStyle, joinStyle );
1170
1171     m_pen.GetColour().CalcPixel( m_cmap );
1172     gdk_gc_set_foreground( m_penGC, m_pen.GetColour().GetColor() );
1173 }
1174
1175 void wxWindowDC::SetBrush( const wxBrush &brush )
1176 {
1177     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1178
1179     if (m_brush == brush) return;
1180
1181     m_brush = brush;
1182
1183     if (!m_brush.Ok()) return;
1184
1185     if (!m_window) return;
1186
1187     m_brush.GetColour().CalcPixel( m_cmap );
1188     gdk_gc_set_foreground( m_brushGC, m_brush.GetColour().GetColor() );
1189
1190     gdk_gc_set_fill( m_brushGC, GDK_SOLID );
1191
1192     if ((m_brush.GetStyle() == wxSTIPPLE) && (m_brush.GetStipple()->Ok()))
1193     {
1194         if (m_brush.GetStipple()->GetPixmap())
1195         {
1196             gdk_gc_set_fill( m_brushGC, GDK_TILED );
1197             gdk_gc_set_tile( m_brushGC, m_brush.GetStipple()->GetPixmap() );
1198         }
1199         else
1200         {
1201             gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1202             gdk_gc_set_stipple( m_brushGC, m_brush.GetStipple()->GetBitmap() );
1203         }
1204     }
1205
1206     if ((m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE) && (m_brush.GetStipple()->GetMask()))
1207     {
1208             gdk_gc_set_fill( m_textGC, GDK_OPAQUE_STIPPLED);
1209             gdk_gc_set_stipple( m_textGC, m_brush.GetStipple()->GetMask()->GetBitmap() );
1210     }
1211
1212     if (IS_HATCH(m_brush.GetStyle()))
1213     {
1214         gdk_gc_set_fill( m_brushGC, GDK_STIPPLED );
1215         int num = m_brush.GetStyle() - wxBDIAGONAL_HATCH;
1216         gdk_gc_set_stipple( m_brushGC, hatches[num] );
1217     }
1218 }
1219
1220 void wxWindowDC::SetBackground( const wxBrush &brush )
1221 {
1222    /* CMB 21/7/98: Added SetBackground. Sets background brush
1223     * for Clear() and bg colour for shapes filled with cross-hatch brush */
1224
1225     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1226
1227     if (m_backgroundBrush == brush) return;
1228
1229     m_backgroundBrush = brush;
1230
1231     if (!m_backgroundBrush.Ok()) return;
1232
1233     if (!m_window) return;
1234
1235     m_backgroundBrush.GetColour().CalcPixel( m_cmap );
1236     gdk_gc_set_background( m_brushGC, m_backgroundBrush.GetColour().GetColor() );
1237     gdk_gc_set_background( m_penGC, m_backgroundBrush.GetColour().GetColor() );
1238     gdk_gc_set_background( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1239     gdk_gc_set_foreground( m_bgGC, m_backgroundBrush.GetColour().GetColor() );
1240
1241     gdk_gc_set_fill( m_bgGC, GDK_SOLID );
1242
1243     if ((m_backgroundBrush.GetStyle() == wxSTIPPLE) && (m_backgroundBrush.GetStipple()->Ok()))
1244     {
1245         if (m_backgroundBrush.GetStipple()->GetPixmap())
1246         {
1247             gdk_gc_set_fill( m_bgGC, GDK_TILED );
1248             gdk_gc_set_tile( m_bgGC, m_backgroundBrush.GetStipple()->GetPixmap() );
1249         }
1250         else
1251         {
1252             gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1253             gdk_gc_set_stipple( m_bgGC, m_backgroundBrush.GetStipple()->GetBitmap() );
1254         }
1255     }
1256
1257     if (IS_HATCH(m_backgroundBrush.GetStyle()))
1258     {
1259         gdk_gc_set_fill( m_bgGC, GDK_STIPPLED );
1260         int num = m_backgroundBrush.GetStyle() - wxBDIAGONAL_HATCH;
1261         gdk_gc_set_stipple( m_bgGC, hatches[num] );
1262     }
1263 }
1264
1265 void wxWindowDC::SetLogicalFunction( int function )
1266 {
1267     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1268
1269     if (m_logicalFunction == function)
1270         return;
1271
1272     // VZ: shouldn't this be a CHECK?
1273     if (!m_window)
1274         return;
1275
1276     GdkFunction mode = GDK_COPY;
1277     switch (function)
1278     {
1279         case wxXOR:          mode = GDK_XOR;           break;
1280         case wxINVERT:       mode = GDK_INVERT;        break;
1281 #if (GTK_MINOR_VERSION > 0)
1282         case wxOR_REVERSE:   mode = GDK_OR_REVERSE;    break;
1283         case wxAND_REVERSE:  mode = GDK_AND_REVERSE;   break;
1284         case wxCLEAR:        mode = GDK_CLEAR;         break;
1285         case wxSET:          mode = GDK_SET;           break;
1286         case wxOR_INVERT:    mode = GDK_OR_INVERT;     break;
1287         case wxAND:          mode = GDK_AND;           break;
1288         case wxOR:           mode = GDK_OR;            break;
1289         case wxEQUIV:        mode = GDK_EQUIV;         break;
1290         case wxNAND:         mode = GDK_NAND;          break;
1291         case wxAND_INVERT:   mode = GDK_AND_INVERT;    break;
1292         case wxCOPY:         mode = GDK_COPY;          break;
1293         case wxNO_OP:        mode = GDK_NOOP;          break;
1294         case wxSRC_INVERT:   mode = GDK_COPY_INVERT;   break;
1295
1296         // unsupported by GTK
1297         case wxNOR:          mode = GDK_COPY;          break;
1298 #endif
1299         default:
1300         {
1301            wxFAIL_MSG( wxT("unsupported logical function") );
1302            break;
1303         }
1304     }
1305
1306     m_logicalFunction = function;
1307
1308     gdk_gc_set_function( m_penGC, mode );
1309     gdk_gc_set_function( m_brushGC, mode );
1310
1311     // to stay compatible with wxMSW, we don't apply ROPs to the text
1312     // operations (i.e. DrawText/DrawRotatedText)
1313     //  gdk_gc_set_function( m_textGC, mode );
1314 }
1315
1316 void wxWindowDC::SetTextForeground( const wxColour &col )
1317 {
1318     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1319
1320     if (m_textForegroundColour == col) return;
1321
1322     m_textForegroundColour = col;
1323     if (!m_textForegroundColour.Ok()) return;
1324
1325     if (!m_window) return;
1326
1327     m_textForegroundColour.CalcPixel( m_cmap );
1328     gdk_gc_set_foreground( m_textGC, m_textForegroundColour.GetColor() );
1329 }
1330
1331 void wxWindowDC::SetTextBackground( const wxColour &col )
1332 {
1333     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1334
1335     if (m_textBackgroundColour == col) return;
1336
1337     m_textBackgroundColour = col;
1338     if (!m_textBackgroundColour.Ok()) return;
1339
1340     if (!m_window) return;
1341
1342     m_textBackgroundColour.CalcPixel( m_cmap );
1343     gdk_gc_set_background( m_textGC, m_textBackgroundColour.GetColor() );
1344 }
1345
1346 void wxWindowDC::SetBackgroundMode( int mode )
1347 {
1348     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1349
1350     m_backgroundMode = mode;
1351
1352     if (!m_window) return;
1353
1354     // CMB 21/7/98: fill style of cross-hatch brushes is affected by
1355     // transparent/solid background mode
1356
1357     if (m_brush.GetStyle() != wxSOLID && m_brush.GetStyle() != wxTRANSPARENT)
1358     {
1359         gdk_gc_set_fill( m_brushGC,
1360           (m_backgroundMode == wxTRANSPARENT) ? GDK_STIPPLED : GDK_OPAQUE_STIPPLED);
1361     }
1362 }
1363
1364 void wxWindowDC::SetPalette( const wxPalette& WXUNUSED(palette) )
1365 {
1366     wxFAIL_MSG( wxT("wxWindowDC::SetPalette not implemented") );
1367 }
1368
1369 void wxWindowDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
1370 {
1371     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1372
1373     wxDC::DoSetClippingRegion( x, y, width, height );
1374
1375     if (!m_window) return;
1376
1377     GdkRectangle rect;
1378     rect.x = XLOG2DEV(x);
1379     rect.y = YLOG2DEV(y);
1380     rect.width = XLOG2DEVREL(width);
1381     rect.height = YLOG2DEVREL(height);
1382     gdk_gc_set_clip_rectangle( m_penGC, &rect );
1383     gdk_gc_set_clip_rectangle( m_brushGC, &rect );
1384     gdk_gc_set_clip_rectangle( m_textGC, &rect );
1385     gdk_gc_set_clip_rectangle( m_bgGC, &rect );
1386 }
1387
1388 void wxWindowDC::DoSetClippingRegionAsRegion( const wxRegion &region  )
1389 {
1390     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1391
1392     if (region.Empty())
1393     {
1394         DestroyClippingRegion();
1395         return;
1396     }
1397
1398     wxCoord x,y,w,h;
1399     region.GetBox( x, y, w, h );
1400
1401     wxDC::DoSetClippingRegion( x, y, w, h );
1402
1403     if (!m_window) return;
1404
1405     gdk_gc_set_clip_region( m_penGC, region.GetRegion() );
1406     gdk_gc_set_clip_region( m_brushGC, region.GetRegion() );
1407     gdk_gc_set_clip_region( m_textGC, region.GetRegion() );
1408     gdk_gc_set_clip_region( m_bgGC, region.GetRegion() );
1409 }
1410
1411 void wxWindowDC::DestroyClippingRegion()
1412 {
1413     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1414
1415     wxDC::DestroyClippingRegion();
1416
1417     if (!m_window) return;
1418
1419     gdk_gc_set_clip_rectangle( m_penGC, (GdkRectangle *) NULL );
1420     gdk_gc_set_clip_rectangle( m_brushGC, (GdkRectangle *) NULL );
1421     gdk_gc_set_clip_rectangle( m_textGC, (GdkRectangle *) NULL );
1422     gdk_gc_set_clip_rectangle( m_bgGC, (GdkRectangle *) NULL );
1423 }
1424
1425 void wxWindowDC::SetUpDC()
1426 {
1427     Destroy();
1428     m_ok = TRUE;
1429     m_logicalFunction = wxCOPY;
1430     m_penGC = gdk_gc_new( m_window );
1431     m_brushGC = gdk_gc_new( m_window );
1432     m_textGC = gdk_gc_new( m_window );
1433     m_bgGC = gdk_gc_new( m_window );
1434
1435     wxColour tmp_col( m_textForegroundColour );
1436     m_textForegroundColour = wxNullColour;
1437     SetTextForeground( tmp_col );
1438     tmp_col = m_textBackgroundColour;
1439     m_textBackgroundColour = wxNullColour;
1440     SetTextBackground( tmp_col );
1441
1442     wxPen tmp_pen( m_pen );
1443     m_pen = wxNullPen;
1444     SetPen( tmp_pen );
1445
1446     wxFont tmp_font( m_font );
1447     m_font = wxNullFont;
1448     SetFont( tmp_font );
1449
1450     wxBrush tmp_brush( m_brush );
1451     m_brush = wxNullBrush;
1452     SetBrush( tmp_brush );
1453
1454 /*
1455     tmp_brush = m_backgroundBrush;
1456     m_backgroundBrush = wxNullBrush;
1457     SetBackground( tmp_brush );
1458 */
1459     tmp_brush = m_backgroundBrush;
1460     m_backgroundBrush = wxNullBrush;
1461     SetBackground( *wxWHITE_BRUSH );
1462     m_backgroundBrush = tmp_brush;
1463
1464     if (!hatch_bitmap)
1465     {
1466         hatch_bitmap    = hatches;
1467         hatch_bitmap[0] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, bdiag_bits, bdiag_width, bdiag_height );
1468         hatch_bitmap[1] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cdiag_bits, cdiag_width, cdiag_height );
1469         hatch_bitmap[2] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, fdiag_bits, fdiag_width, fdiag_height );
1470         hatch_bitmap[3] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, cross_bits, cross_width, cross_height );
1471         hatch_bitmap[4] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, horiz_bits, horiz_width, horiz_height );
1472         hatch_bitmap[5] = gdk_bitmap_create_from_data( (GdkWindow *) NULL, verti_bits, verti_width, verti_height );
1473     }
1474 }
1475
1476 void wxWindowDC::Destroy()
1477 {
1478     if (m_penGC) gdk_gc_unref( m_penGC );
1479     m_penGC = (GdkGC*) NULL;
1480     if (m_brushGC) gdk_gc_unref( m_brushGC );
1481     m_brushGC = (GdkGC*) NULL;
1482     if (m_textGC) gdk_gc_unref( m_textGC );
1483     m_textGC = (GdkGC*) NULL;
1484     if (m_bgGC) gdk_gc_unref( m_bgGC );
1485     m_bgGC = (GdkGC*) NULL;
1486 }
1487
1488 void wxWindowDC::ComputeScaleAndOrigin()
1489 {
1490     /* CMB: copy scale to see if it changes */
1491     double origScaleX = m_scaleX;
1492     double origScaleY = m_scaleY;
1493
1494     wxDC::ComputeScaleAndOrigin();
1495
1496     /* CMB: if scale has changed call SetPen to recalulate the line width */
1497     if ((m_scaleX != origScaleX || m_scaleY != origScaleY) &&
1498         (m_pen.Ok()))
1499     {
1500       /* this is a bit artificial, but we need to force wxDC to think
1501          the pen has changed */
1502       wxPen pen = m_pen;
1503       m_pen = wxNullPen;
1504       SetPen( pen );
1505   }
1506 }
1507
1508 // Resolution in pixels per logical inch
1509 wxSize wxWindowDC::GetPPI() const
1510 {
1511     return wxSize(100, 100);
1512 }
1513
1514 int wxWindowDC::GetDepth() const
1515 {
1516     wxFAIL_MSG(wxT("not implemented"));
1517
1518     return -1;
1519 }
1520
1521 #if wxUSE_SPLINES
1522 // ----------------------------------- spline code ----------------------------------------
1523
1524 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1525                          double a3, double b3, double a4, double b4);
1526 void wx_clear_stack();
1527 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1528         double *y3, double *x4, double *y4);
1529 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1530           double x4, double y4);
1531 static bool wx_spline_add_point(double x, double y);
1532 static void wx_spline_draw_point_array(wxDC *dc);
1533
1534 wxList wx_spline_point_list;
1535
1536 #define                half(z1, z2)        ((z1+z2)/2.0)
1537 #define                THRESHOLD        5
1538
1539 /* iterative version */
1540
1541 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
1542                  double b4)
1543 {
1544     register double  xmid, ymid;
1545     double           x1, y1, x2, y2, x3, y3, x4, y4;
1546
1547     wx_clear_stack();
1548     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
1549
1550     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
1551         xmid = (double)half(x2, x3);
1552         ymid = (double)half(y2, y3);
1553         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
1554             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
1555             wx_spline_add_point( x1, y1 );
1556             wx_spline_add_point( xmid, ymid );
1557         } else {
1558             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1559                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1560             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1561                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1562         }
1563     }
1564 }
1565
1566 /* utilities used by spline drawing routines */
1567
1568 typedef struct wx_spline_stack_struct {
1569     double           x1, y1, x2, y2, x3, y3, x4, y4;
1570 } Stack;
1571
1572 #define         SPLINE_STACK_DEPTH             20
1573 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1574 static Stack   *wx_stack_top;
1575 static int      wx_stack_count;
1576
1577 void wx_clear_stack()
1578 {
1579     wx_stack_top = wx_spline_stack;
1580     wx_stack_count = 0;
1581 }
1582
1583 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1584 {
1585     wx_stack_top->x1 = x1;
1586     wx_stack_top->y1 = y1;
1587     wx_stack_top->x2 = x2;
1588     wx_stack_top->y2 = y2;
1589     wx_stack_top->x3 = x3;
1590     wx_stack_top->y3 = y3;
1591     wx_stack_top->x4 = x4;
1592     wx_stack_top->y4 = y4;
1593     wx_stack_top++;
1594     wx_stack_count++;
1595 }
1596
1597 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1598                   double *x3, double *y3, double *x4, double *y4)
1599 {
1600     if (wx_stack_count == 0)
1601         return (0);
1602     wx_stack_top--;
1603     wx_stack_count--;
1604     *x1 = wx_stack_top->x1;
1605     *y1 = wx_stack_top->y1;
1606     *x2 = wx_stack_top->x2;
1607     *y2 = wx_stack_top->y2;
1608     *x3 = wx_stack_top->x3;
1609     *y3 = wx_stack_top->y3;
1610     *x4 = wx_stack_top->x4;
1611     *y4 = wx_stack_top->y4;
1612     return (1);
1613 }
1614
1615 static bool wx_spline_add_point(double x, double y)
1616 {
1617   wxPoint *point = new wxPoint ;
1618   point->x = (int) x;
1619   point->y = (int) y;
1620   wx_spline_point_list.Append((wxObject*)point);
1621   return TRUE;
1622 }
1623
1624 static void wx_spline_draw_point_array(wxDC *dc)
1625 {
1626   dc->DrawLines(&wx_spline_point_list, 0, 0 );
1627   wxNode *node = wx_spline_point_list.First();
1628   while (node)
1629   {
1630     wxPoint *point = (wxPoint *)node->Data();
1631     delete point;
1632     delete node;
1633     node = wx_spline_point_list.First();
1634   }
1635 }
1636
1637 void wxWindowDC::DoDrawSpline( wxList *points )
1638 {
1639     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1640
1641     wxPoint *p;
1642     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1643     double           x1, y1, x2, y2;
1644
1645     wxNode *node = points->First();
1646     p = (wxPoint *)node->Data();
1647
1648     x1 = p->x;
1649     y1 = p->y;
1650
1651     node = node->Next();
1652     p = (wxPoint *)node->Data();
1653
1654     x2 = p->x;
1655     y2 = p->y;
1656     cx1 = (double)((x1 + x2) / 2);
1657     cy1 = (double)((y1 + y2) / 2);
1658     cx2 = (double)((cx1 + x2) / 2);
1659     cy2 = (double)((cy1 + y2) / 2);
1660
1661     wx_spline_add_point(x1, y1);
1662
1663     while ((node = node->Next()) != NULL)
1664     {
1665         p = (wxPoint *)node->Data();
1666         x1 = x2;
1667         y1 = y2;
1668         x2 = p->x;
1669         y2 = p->y;
1670         cx4 = (double)(x1 + x2) / 2;
1671         cy4 = (double)(y1 + y2) / 2;
1672         cx3 = (double)(x1 + cx4) / 2;
1673         cy3 = (double)(y1 + cy4) / 2;
1674
1675         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1676
1677         cx1 = cx4;
1678         cy1 = cy4;
1679         cx2 = (double)(cx1 + x2) / 2;
1680         cy2 = (double)(cy1 + y2) / 2;
1681     }
1682
1683     wx_spline_add_point( cx1, cy1 );
1684     wx_spline_add_point( x2, y2 );
1685
1686     wx_spline_draw_point_array( this );
1687 }
1688
1689 #endif // wxUSE_SPLINE
1690
1691 //-----------------------------------------------------------------------------
1692 // wxPaintDC
1693 //-----------------------------------------------------------------------------
1694
1695 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC,wxWindowDC)
1696
1697 wxPaintDC::wxPaintDC()
1698   : wxWindowDC()
1699 {
1700 }
1701
1702 wxPaintDC::wxPaintDC( wxWindow *win )
1703   : wxWindowDC( win )
1704 {
1705 }
1706
1707 //-----------------------------------------------------------------------------
1708 // wxClientDC
1709 //-----------------------------------------------------------------------------
1710
1711 IMPLEMENT_DYNAMIC_CLASS(wxClientDC,wxWindowDC)
1712
1713 wxClientDC::wxClientDC()
1714   : wxWindowDC()
1715 {
1716 }
1717
1718 wxClientDC::wxClientDC( wxWindow *win )
1719   : wxWindowDC( win )
1720 {
1721 }
1722