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 #include "wx/display.h"
  28 #include "wx/display_impl.h"
  29 #include "wx/intl.h"
  30 #include "wx/log.h"
  31
  32 #ifndef WX_PRECOMP
  33   #include "wx/dynarray.h"
  34   #include "wx/gdicmn.h"
  35   #include "wx/string.h"
  36   #include "wx/utils.h"
  37 #endif /* WX_PRECOMP */
  38
  39 #if wxUSE_DISPLAY
  40
  41 /* These must be included after the wx files.  Otherwise the Data macro in
  42  * Xlibint.h conflicts with a function declaration in wx/list.h.  */
  43 extern "C"
  44 {
  45     #include <X11/Xlib.h>
  46     #include <X11/Xlibint.h>
  47
  48     #include <X11/extensions/Xinerama.h>
  49     #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
  50         #include <X11/extensions/xf86vmode.h>
  51     #endif
  52 }
  53
  54 // ----------------------------------------------------------------------------
  55 // helper class to automatically free XineramaQueryScreens() return value
  56 // ----------------------------------------------------------------------------
  57
  58 class ScreensInfo
  59 {
  60 public:
  61     ScreensInfo()
  62     {
  63         m_screens = XineramaQueryScreens((Display *)wxGetDisplay(), &m_num);
  64     }
  65
  66     ~ScreensInfo()
  67     {
  68         XFree(m_screens);
  69     }
  70
  71     operator const XineramaScreenInfo *() const { return m_screens; }
  72
  73     size_t GetCount() const { return wx_static_cast(size_t, m_num); }
  74
  75 private:
  76     XineramaScreenInfo *m_screens;
  77     int m_num;
  78 };
  79
  80 // ----------------------------------------------------------------------------
  81 // display and display factory classes
  82 // ----------------------------------------------------------------------------
  83
  84 class WXDLLEXPORT wxDisplayImplX11 : public wxDisplayImpl
  85 {
  86 public:
  87     wxDisplayImplX11(size_t n, const XineramaScreenInfo& info)
  88         : wxDisplayImpl(n),
  89           m_rect(info.x_org, info.y_org, info.width, info.height)
  90     {
  91     }
  92
  93     virtual wxRect GetGeometry() const { return m_rect; }
  94     virtual wxString GetName() const { return wxString(); }
  95
  96     virtual wxArrayVideoModes GetModes(const wxVideoMode& mode) const;
  97     virtual wxVideoMode GetCurrentMode() const;
  98     virtual bool ChangeMode(const wxVideoMode& mode);
  99
 100 private:
 101     wxRect m_rect;
 102     int m_depth;
 103
 104     DECLARE_NO_COPY_CLASS(wxDisplayImplX11)
 105 };
 106
 107 class wxDisplayFactoryX11 : public wxDisplayFactory
 108 {
 109 public:
 110     wxDisplayFactoryX11() { }
 111
 112     virtual wxDisplayImpl *CreateDisplay(size_t n);
 113     virtual size_t GetCount();
 114     virtual int GetFromPoint(const wxPoint& pt);
 115
 116 protected:
 117     DECLARE_NO_COPY_CLASS(wxDisplayFactoryX11)
 118 };
 119
 120 // ============================================================================
 121 // wxDisplayFactoryX11 implementation
 122 // ============================================================================
 123
 124 size_t wxDisplayFactoryX11::GetCount()
 125 {
 126     return ScreensInfo().GetCount();
 127 }
 128
 129 int wxDisplayFactoryX11::GetFromPoint(const wxPoint& p)
 130 {
 131     ScreensInfo screens;
 132
 133     const size_t numscreens(screens.GetCount());
 134     for ( size_t i = 0; i < numscreens; ++i )
 135     {
 136         const XineramaScreenInfo& s = screens[i];
 137         if ( p.x >= s.x_org && p.x < s.x_org + s.width &&
 138                 p.y >= s.y_org && p.y < s.y_org + s.height )
 139         {
 140             return i;
 141         }
 142     }
 143
 144     return wxNOT_FOUND;
 145 }
 146
 147 wxDisplayImpl *wxDisplayFactoryX11::CreateDisplay(size_t n)
 148 {
 149     ScreensInfo screens;
 150
 151     return n < screens.GetCount() ? new wxDisplayImplX11(n, screens[n]) : NULL;
 152 }
 153
 154 // ============================================================================
 155 // wxDisplayImplX11 implementation
 156 // ============================================================================
 157
 158 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
 159
 160 //
 161 //  See (http://www.xfree86.org/4.2.0/XF86VidModeDeleteModeLine.3.html) for more
 162 //  info about xf86 video mode extensions
 163 //
 164
 165 //free private data common to x (usually s3) servers
 166 #define wxClearXVM(vm)  if(vm.privsize) XFree(vm.c_private)
 167
 168 // Correct res rate from GLFW
 169 #define wxCRR2(v,dc) (int) (((1000.0f * (float) dc) /*PIXELS PER SECOND */) / ((float) v.htotal * v.vtotal /*PIXELS PER FRAME*/) + 0.5f)
 170 #define wxCRR(v) wxCRR2(v,v.dotclock)
 171 #define wxCVM2(v, dc) wxVideoMode(v.hdisplay, v.vdisplay, DefaultDepth((Display*)wxGetDisplay(), DefaultScreen((Display*)wxGetDisplay())), wxCRR2(v,dc))
 172 #define wxCVM(v) wxCVM2(v, v.dotclock)
 173
 174 wxArrayVideoModes wxDisplayImplX11::GetModes(const wxVideoMode& mode) const
 175 {
 176     //Convenience...
 177     Display* pDisplay = (Display*) wxGetDisplay(); //default display
 178     int nScreen = DefaultScreen(pDisplay); //default screen of (default) display...
 179
 180     //Some variables..
 181     XF86VidModeModeInfo** ppXModes; //Enumerated Modes (Don't forget XFree() :))
 182     int nNumModes; //Number of modes enumerated....
 183
 184     wxArrayVideoModes Modes; //modes to return...
 185
 186     if (XF86VidModeGetAllModeLines(pDisplay, nScreen, &nNumModes, &ppXModes) == TRUE)
 187     {
 188         for (int i = 0; i < nNumModes; ++i)
 189         {
 190             if (mode == wxDefaultVideoMode || //According to display.h All modes valid if dafault mode...
 191                 mode.Matches(wxCVM((*ppXModes[i]))) ) //...?
 192             {
 193                 Modes.Add(wxCVM((*ppXModes[i])));
 194             }
 195             wxClearXVM((*ppXModes[i]));
 196         //  XFree(ppXModes[i]); //supposed to free?
 197         }
 198         XFree(ppXModes);
 199     }
 200     else //OOPS!
 201     {
 202         wxLogSysError(_("Failed to enumerate video modes"));
 203     }
 204
 205     return Modes;
 206 }
 207
 208 wxVideoMode wxDisplayImplX11::GetCurrentMode() const
 209 {
 210   XF86VidModeModeLine VM;
 211   int nDotClock;
 212   XF86VidModeGetModeLine((Display*)wxGetDisplay(), DefaultScreen((Display*)wxGetDisplay()),
 213                          &nDotClock, &VM);
 214   wxClearXVM(VM);
 215   return wxCVM2(VM, nDotClock);
 216 }
 217
 218 bool wxDisplayImplX11::ChangeMode(const wxVideoMode& mode)
 219 {
 220     XF86VidModeModeInfo** ppXModes; //Enumerated Modes (Don't forget XFree() :))
 221     int nNumModes; //Number of modes enumerated....
 222
 223     if( !XF86VidModeGetAllModeLines((Display*)wxGetDisplay(), DefaultScreen((Display*)wxGetDisplay()), &nNumModes, &ppXModes) )
 224     {
 225         wxLogSysError(_("Failed to change video mode"));
 226         return false;
 227     }
 228
 229     bool bRet = false;
 230     if (mode == wxDefaultVideoMode)
 231     {
 232         bRet = XF86VidModeSwitchToMode((Display*)wxGetDisplay(), DefaultScreen((Display*)wxGetDisplay()),
 233                      ppXModes[0]) == TRUE;
 234
 235         for (int i = 0; i < nNumModes; ++i)
 236         {
 237             wxClearXVM((*ppXModes[i]));
 238         //  XFree(ppXModes[i]); //supposed to free?
 239         }
 240     }
 241     else
 242     {
 243         for (int i = 0; i < nNumModes; ++i)
 244         {
 245             if (!bRet &&
 246                 ppXModes[i]->hdisplay == mode.w &&
 247                 ppXModes[i]->vdisplay == mode.h &&
 248                 wxCRR((*ppXModes[i])) == mode.refresh)
 249             {
 250                 //switch!
 251                 bRet = XF86VidModeSwitchToMode((Display*)wxGetDisplay(), DefaultScreen((Display*)wxGetDisplay()),
 252                          ppXModes[i]) == TRUE;
 253             }
 254             wxClearXVM((*ppXModes[i]));
 255         //  XFree(ppXModes[i]); //supposed to free?
 256         }
 257     }
 258
 259     XFree(ppXModes);
 260
 261     return bRet;
 262 }
 263
 264
 265 #else // !HAVE_X11_EXTENSIONS_XF86VMODE_H
 266
 267 wxArrayVideoModes wxDisplayImplX11::GetModes(const wxVideoMode& mode) const
 268 {
 269     int count_return;
 270     int* depths = XListDepths((Display*)wxGetDisplay(), 0, &count_return);
 271     wxArrayVideoModes modes;
 272     if ( depths )
 273     {
 274         for ( int x = 0; x < count_return; ++x )
 275         {
 276             modes.Add(wxVideoMode(m_rect.GetWidth(), m_rect.GetHeight(), depths[x]));
 277         }
 278
 279         XFree(depths);
 280     }
 281     return modes;
 282 }
 283
 284 wxVideoMode wxDisplayImplX11::GetCurrentMode() const
 285 {
 286     // Not implemented
 287     return wxVideoMode();
 288 }
 289
 290 bool wxDisplayImplX11::ChangeMode(const wxVideoMode& mode)
 291 {
 292     // Not implemented
 293     return false;
 294 }
 295
 296 #endif // !HAVE_X11_EXTENSIONS_XF86VMODE_H
 297
 298 // ============================================================================
 299 // wxDisplay::CreateFactory()
 300 // ============================================================================
 301
 302 /* static */ wxDisplayFactory *wxDisplay::CreateFactory()
 303 {
 304     if ( XineramaIsActive((Display*)wxGetDisplay()) )
 305     {
 306         return new wxDisplayFactoryX11;
 307     }
 308
 309     return new wxDisplayFactorySingle;
 310 }
 311
 312 #endif /* wxUSE_DISPLAY */