src/unix/displayx11.cpp

   1 ///////////////////////////////////////////////////////////////////////////
   2 // Name:        src/unix/displayx11.cpp
   3 // Purpose:     Unix/X11 implementation of wxDisplay class
   4 // Author:      Brian Victor, Vadim Zeitlin
   5 // Modified by:
   6 // Created:     12/05/02
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_DISPLAY
  28
  29 #include "wx/display.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/dynarray.h"
  33     #include "wx/gdicmn.h"
  34     #include "wx/string.h"
  35     #include "wx/utils.h"
  36     #include "wx/intl.h"
  37     #include "wx/log.h"
  38 #endif /* WX_PRECOMP */
  39
  40 #include "wx/display_impl.h"
  41
  42 #ifdef __WXGTK20__
  43     #include <gdk/gdk.h>
  44     #include <gdk/gdkx.h>
  45
  46     // define the struct with the same fields as XineramaScreenInfo (except for
  47     // screen number which we don't need) but which we can use without
  48     // including Xinerama headers
  49     struct ScreenInfo
  50     {
  51        short x_org;
  52        short y_org;
  53        short width;
  54        short height;
  55     };
  56 #else // use raw Xinerama functions
  57     /* These must be included after the wx files.  Otherwise the Data macro in
  58      * Xlibint.h conflicts with a function declaration in wx/list.h.  */
  59     extern "C"
  60     {
  61         #include <X11/Xlib.h>
  62         #include <X11/Xlibint.h>
  63
  64         #include <X11/extensions/Xinerama.h>
  65     }
  66
  67     typedef XineramaScreenInfo ScreenInfo;
  68 #endif // GTK+/Xinerama
  69
  70 // ----------------------------------------------------------------------------
  71 // helper class storing information about all screens
  72 // ----------------------------------------------------------------------------
  73
  74 // the base class provides access to ScreenInfo array, derived class
  75 // initializes it using either GTK+ or Xinerama functions
  76 class ScreensInfoBase
  77 {
  78 public:
  79     operator const ScreenInfo *() const { return m_screens; }
  80
  81     unsigned GetCount() const { return static_cast<unsigned>(m_num); }
  82
  83 protected:
  84     ScreenInfo *m_screens;
  85     int m_num;
  86 };
  87
  88 #ifdef __WXGTK20__
  89
  90 class ScreensInfo : public ScreensInfoBase
  91 {
  92 public:
  93     ScreensInfo()
  94     {
  95         GdkScreen * const screen = gdk_screen_get_default();
  96
  97         m_num = gdk_screen_get_n_monitors(screen);
  98         m_screens = new ScreenInfo[m_num];
  99         for ( int i = 0; i < m_num; i++ )
 100         {
 101             GdkRectangle rect;
 102             gdk_screen_get_monitor_geometry(screen, i, &rect);
 103             m_screens[i].x_org = rect.x;
 104             m_screens[i].y_org = rect.y;
 105             m_screens[i].width = rect.width;
 106             m_screens[i].height = rect.height;
 107         }
 108     }
 109
 110     ~ScreensInfo()
 111     {
 112         delete [] m_screens;
 113     }
 114 };
 115
 116 #else // Xinerama
 117
 118 class ScreensInfo : public ScreensInfoBase
 119 {
 120 public:
 121     ScreensInfo()
 122     {
 123         m_screens = XineramaQueryScreens((Display *)wxGetDisplay(), &m_num);
 124     }
 125
 126     ~ScreensInfo()
 127     {
 128         XFree(m_screens);
 129     }
 130 };
 131
 132 #endif // GTK+/Xinerama
 133
 134 // ----------------------------------------------------------------------------
 135 // display and display factory classes
 136 // ----------------------------------------------------------------------------
 137
 138 class WXDLLEXPORT wxDisplayImplX11 : public wxDisplayImpl
 139 {
 140 public:
 141     wxDisplayImplX11(unsigned n, const ScreenInfo& info)
 142         : wxDisplayImpl(n),
 143           m_rect(info.x_org, info.y_org, info.width, info.height)
 144     {
 145     }
 146
 147     virtual wxRect GetGeometry() const { return m_rect; }
 148     virtual wxRect GetClientArea() const
 149     {
 150         // we intentionally don't cache the result here because the client
 151         // display area may change (e.g. the user resized or hid a panel) and
 152         // we don't currently react to its changes
 153         return IsPrimary() ? wxGetClientDisplayRect() : m_rect;
 154     }
 155
 156     virtual wxString GetName() const { return wxString(); }
 157
 158     virtual wxArrayVideoModes GetModes(const wxVideoMode& mode) const;
 159     virtual wxVideoMode GetCurrentMode() const;
 160     virtual bool ChangeMode(const wxVideoMode& mode);
 161
 162 private:
 163     wxRect m_rect;
 164     int m_depth;
 165
 166     wxDECLARE_NO_COPY_CLASS(wxDisplayImplX11);
 167 };
 168
 169 class wxDisplayFactoryX11 : public wxDisplayFactory
 170 {
 171 public:
 172     wxDisplayFactoryX11() { }
 173
 174     virtual wxDisplayImpl *CreateDisplay(unsigned n);
 175     virtual unsigned GetCount();
 176     virtual int GetFromPoint(const wxPoint& pt);
 177
 178 protected:
 179     wxDECLARE_NO_COPY_CLASS(wxDisplayFactoryX11);
 180 };
 181
 182 // ============================================================================
 183 // wxDisplayFactoryX11 implementation
 184 // ============================================================================
 185
 186 unsigned wxDisplayFactoryX11::GetCount()
 187 {
 188     return ScreensInfo().GetCount();
 189 }
 190
 191 int wxDisplayFactoryX11::GetFromPoint(const wxPoint& p)
 192 {
 193     ScreensInfo screens;
 194
 195     const unsigned numscreens(screens.GetCount());
 196     for ( unsigned i = 0; i < numscreens; ++i )
 197     {
 198         const ScreenInfo& s = screens[i];
 199         if ( p.x >= s.x_org && p.x < s.x_org + s.width &&
 200                 p.y >= s.y_org && p.y < s.y_org + s.height )
 201         {
 202             return i;
 203         }
 204     }
 205
 206     return wxNOT_FOUND;
 207 }
 208
 209 wxDisplayImpl *wxDisplayFactoryX11::CreateDisplay(unsigned n)
 210 {
 211     ScreensInfo screens;
 212
 213     return n < screens.GetCount() ? new wxDisplayImplX11(n, screens[n]) : NULL;
 214 }
 215
 216 // ============================================================================
 217 // wxDisplayImplX11 implementation
 218 // ============================================================================
 219
 220 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
 221
 222 #include <X11/extensions/xf86vmode.h>
 223
 224 //
 225 //  See (http://www.xfree86.org/4.2.0/XF86VidModeDeleteModeLine.3.html) for more
 226 //  info about xf86 video mode extensions
 227 //
 228
 229 //free private data common to x (usually s3) servers
 230 #define wxClearXVM(vm)  if(vm.privsize) XFree(vm.c_private)
 231
 232 // Correct res rate from GLFW
 233 #define wxCRR2(v,dc) (int) (((1000.0f * (float) dc) /*PIXELS PER SECOND */) / ((float) v.htotal * v.vtotal /*PIXELS PER FRAME*/) + 0.5f)
 234 #define wxCRR(v) wxCRR2(v,v.dotclock)
 235 #define wxCVM2(v, dc) wxVideoMode(v.hdisplay, v.vdisplay, DefaultDepth((Display*)wxGetDisplay(), DefaultScreen((Display*)wxGetDisplay())), wxCRR2(v,dc))
 236 #define wxCVM(v) wxCVM2(v, v.dotclock)
 237
 238 wxArrayVideoModes wxDisplayImplX11::GetModes(const wxVideoMode& mode) const
 239 {
 240     //Convenience...
 241     Display* pDisplay = (Display*) wxGetDisplay(); //default display
 242     int nScreen = DefaultScreen(pDisplay); //default screen of (default) display...
 243
 244     //Some variables..
 245     XF86VidModeModeInfo** ppXModes; //Enumerated Modes (Don't forget XFree() :))
 246     int nNumModes; //Number of modes enumerated....
 247
 248     wxArrayVideoModes Modes; //modes to return...
 249
 250     if (XF86VidModeGetAllModeLines(pDisplay, nScreen, &nNumModes, &ppXModes) == TRUE)
 251     {
 252         for (int i = 0; i < nNumModes; ++i)
 253         {
 254             if (mode == wxDefaultVideoMode || //According to display.h All modes valid if dafault mode...
 255                 mode.Matches(wxCVM((*ppXModes[i]))) ) //...?
 256             {
 257                 Modes.Add(wxCVM((*ppXModes[i])));
 258             }
 259             wxClearXVM((*ppXModes[i]));
 260         //  XFree(ppXModes[i]); //supposed to free?
 261         }
 262         XFree(ppXModes);
 263     }
 264     else //OOPS!
 265     {
 266         wxLogSysError(_("Failed to enumerate video modes"));
 267     }
 268
 269     return Modes;
 270 }
 271
 272 wxVideoMode wxDisplayImplX11::GetCurrentMode() const
 273 {
 274   XF86VidModeModeLine VM;
 275   int nDotClock;
 276   XF86VidModeGetModeLine((Display*)wxGetDisplay(), DefaultScreen((Display*)wxGetDisplay()),
 277                          &nDotClock, &VM);
 278   wxClearXVM(VM);
 279   return wxCVM2(VM, nDotClock);
 280 }
 281
 282 bool wxDisplayImplX11::ChangeMode(const wxVideoMode& mode)
 283 {
 284     XF86VidModeModeInfo** ppXModes; //Enumerated Modes (Don't forget XFree() :))
 285     int nNumModes; //Number of modes enumerated....
 286
 287     if( !XF86VidModeGetAllModeLines((Display*)wxGetDisplay(), DefaultScreen((Display*)wxGetDisplay()), &nNumModes, &ppXModes) )
 288     {
 289         wxLogSysError(_("Failed to change video mode"));
 290         return false;
 291     }
 292
 293     bool bRet = false;
 294     if (mode == wxDefaultVideoMode)
 295     {
 296         bRet = XF86VidModeSwitchToMode((Display*)wxGetDisplay(), DefaultScreen((Display*)wxGetDisplay()),
 297                      ppXModes[0]) == TRUE;
 298
 299         for (int i = 0; i < nNumModes; ++i)
 300         {
 301             wxClearXVM((*ppXModes[i]));
 302         //  XFree(ppXModes[i]); //supposed to free?
 303         }
 304     }
 305     else
 306     {
 307         for (int i = 0; i < nNumModes; ++i)
 308         {
 309             if (!bRet &&
 310                 ppXModes[i]->hdisplay == mode.GetWidth() &&
 311                 ppXModes[i]->vdisplay == mode.GetHeight() &&
 312                 wxCRR((*ppXModes[i])) == mode.GetRefresh())
 313             {
 314                 //switch!
 315                 bRet = XF86VidModeSwitchToMode((Display*)wxGetDisplay(), DefaultScreen((Display*)wxGetDisplay()),
 316                          ppXModes[i]) == TRUE;
 317             }
 318             wxClearXVM((*ppXModes[i]));
 319         //  XFree(ppXModes[i]); //supposed to free?
 320         }
 321     }
 322
 323     XFree(ppXModes);
 324
 325     return bRet;
 326 }
 327
 328
 329 #else // !HAVE_X11_EXTENSIONS_XF86VMODE_H
 330
 331 wxArrayVideoModes wxDisplayImplX11::GetModes(const wxVideoMode& modeMatch) const
 332 {
 333     int count_return;
 334     int* depths = XListDepths((Display*)wxGetDisplay(), 0, &count_return);
 335     wxArrayVideoModes modes;
 336     if ( depths )
 337     {
 338         for ( int x = 0; x < count_return; ++x )
 339         {
 340             wxVideoMode mode(m_rect.GetWidth(), m_rect.GetHeight(), depths[x]);
 341             if ( mode.Matches(modeMatch) )
 342             {
 343                 modes.Add(modeMatch);
 344             }
 345         }
 346
 347         XFree(depths);
 348     }
 349     return modes;
 350 }
 351
 352 wxVideoMode wxDisplayImplX11::GetCurrentMode() const
 353 {
 354     // Not implemented
 355     return wxVideoMode();
 356 }
 357
 358 bool wxDisplayImplX11::ChangeMode(const wxVideoMode& WXUNUSED(mode))
 359 {
 360     // Not implemented
 361     return false;
 362 }
 363
 364 #endif // !HAVE_X11_EXTENSIONS_XF86VMODE_H
 365
 366 // ============================================================================
 367 // wxDisplay::CreateFactory()
 368 // ============================================================================
 369
 370 /* static */ wxDisplayFactory *wxDisplay::CreateFactory()
 371 {
 372     // GTK+ screen functions are always available, no need to check for them
 373 #ifndef __WXGTK20__
 374     if ( !XineramaIsActive((Display*)wxGetDisplay()) )
 375         return new wxDisplayFactorySingle;
 376 #endif
 377
 378     return new wxDisplayFactoryX11;
 379 }
 380
 381 #endif /* wxUSE_DISPLAY */
 382
 383 #include "wx/utils.h"
 384
 385 #if wxUSE_LIBHILDON || wxUSE_LIBHILDON2 || !defined(GDK_WINDOWING_X11)
 386
 387 void wxClientDisplayRect(int *x, int *y, int *width, int *height)
 388 {
 389     // TODO: don't hardcode display size
 390     if ( x )
 391         *x = 0;
 392     if ( y )
 393         *y = 0;
 394     if ( width )
 395         *width = 672;
 396     if ( height )
 397         *height = 396;
 398 }
 399
 400 #else // !wxUSE_LIBHILDON || !wxUSE_LIBHILDON2
 401
 402 #include "wx/log.h"
 403
 404 #include <X11/Xlib.h>
 405 #include <X11/Xatom.h>
 406
 407 // TODO: make this a full-fledged class and move to a public header
 408 class wxX11Ptr
 409 {
 410 public:
 411     wxX11Ptr(void *ptr = NULL) : m_ptr(ptr) { }
 412     ~wxX11Ptr() { if ( m_ptr ) XFree(m_ptr); }
 413
 414 private:
 415     void *m_ptr;
 416
 417     wxDECLARE_NO_COPY_CLASS(wxX11Ptr);
 418 };
 419
 420 // NB: this function is implemented using X11 and not GDK calls as it's shared
 421 //     by wxGTK[12], wxX11 and wxMotif ports
 422 void wxClientDisplayRect(int *x, int *y, int *width, int *height)
 423 {
 424     Display * const dpy = wxGetX11Display();
 425     wxCHECK_RET( dpy, wxT("can't be called before initializing the GUI") );
 426
 427     const Atom atomWorkArea = XInternAtom(dpy, "_NET_WORKAREA", True);
 428     if ( atomWorkArea )
 429     {
 430         long *workareas = NULL;
 431         unsigned long numItems;
 432         unsigned long bytesRemaining;
 433         Atom actualType;
 434         int format;
 435
 436         if ( XGetWindowProperty
 437              (
 438                 dpy,
 439                 XDefaultRootWindow(dpy),
 440                 atomWorkArea,
 441                 0,                          // offset of data to retrieve
 442                 4,                          // number of items to retrieve
 443                 False,                      // don't delete property
 444                 XA_CARDINAL,                // type of the items to get
 445                 &actualType,
 446                 &format,
 447                 &numItems,
 448                 &bytesRemaining,
 449                 (unsigned char **)&workareas
 450              ) == Success && workareas )
 451         {
 452             wxX11Ptr x11ptr(workareas); // ensure it will be freed
 453
 454             // check that we retrieved the property of the expected type and
 455             // that we did get back 4 longs (32 is the format for long), as
 456             // requested
 457             if ( actualType != XA_CARDINAL ||
 458                     format != 32 ||
 459                         numItems != 4 )
 460             {
 461                 wxLogDebug(wxT("XGetWindowProperty(\"_NET_WORKAREA\") failed"));
 462                 return;
 463             }
 464
 465             if ( x )
 466                 *x = workareas[0];
 467             if ( y )
 468                 *y = workareas[1];
 469             if ( width )
 470                 *width = workareas[2];
 471             if ( height )
 472                 *height = workareas[3];
 473
 474             return;
 475         }
 476     }
 477
 478     // if we get here, _NET_WORKAREA is not supported so return the entire
 479     // screen size as fall back
 480     if (x)
 481         *x = 0;
 482     if (y)
 483         *y = 0;
 484     wxDisplaySize(width, height);
 485 }
 486
 487 #endif // wxUSE_LIBHILDON/!wxUSE_LIBHILDON