source/graphics/x11/display.cpp

   1 #include <iostream>
   2 #include <X11/Xlib.h>
   3 #ifdef WITH_XF86VIDMODE
   4 #include <X11/extensions/xf86vmode.h>
   5 #endif
   6 #include <msp/io/print.h>
   7 #include <msp/strings/format.h>
   8 #include <msp/strings/lexicalcast.h>
   9 #include "display.h"
  10 #include "display_private.h"
  11
  12 using namespace std;
  13
  14 namespace {
  15
  16 bool error_flag = false;
  17 std::string error_msg;
  18
  19 int x_error_handler(Display *display, XErrorEvent *event)
  20 {
  21         char err[128];
  22         XGetErrorText(display, event->error_code, err, sizeof(err));
  23
  24         string request_code = Msp::lexical_cast<string, int>(event->request_code);
  25         char req[128];
  26         XGetErrorDatabaseText(display, "XRequest", request_code.c_str(), request_code.c_str(), req, sizeof(req));
  27
  28         string msg = Msp::format("Request %s failed with %s [%08X]", req, err, event->resourceid);
  29         if(error_flag)
  30                 Msp::IO::print(Msp::IO::cerr, "Discarding error: %s\n", msg);
  31         else
  32         {
  33                 Msp::IO::print(Msp::IO::cerr, "%s\n", msg);
  34                 error_msg = msg;
  35                 error_flag = true;
  36         }
  37
  38         return 0;
  39 }
  40
  41 }
  42
  43
  44 namespace Msp {
  45 namespace Graphics {
  46
  47 Display::Display(const string &disp_name):
  48         priv(new Private)
  49 {
  50         if(disp_name.empty())
  51                 priv->display = XOpenDisplay(0);
  52         else
  53                 priv->display = XOpenDisplay(disp_name.c_str());
  54         if(!priv->display)
  55                 throw runtime_error("XOpenDisplay");
  56
  57         XSetErrorHandler(x_error_handler);
  58
  59 #ifdef WITH_XF86VIDMODE
  60         int screen = DefaultScreen(priv->display);
  61
  62         int nmodes;
  63         XF86VidModeModeInfo **infos;
  64         XF86VidModeGetAllModeLines(priv->display, screen, &nmodes, &infos);
  65         for(int i=0; i<nmodes; ++i)
  66         {
  67                 XF86VidModeModeInfo &info = *infos[i];
  68
  69                 VideoMode mode(info.hdisplay, info.vdisplay);
  70                 if(info.htotal && info.vtotal)
  71                         mode.rate = info.dotclock/(info.htotal*info.vtotal);
  72                 modes.push_back(mode);
  73         }
  74
  75         XFree(infos);
  76
  77         XF86VidModeModeLine modeline;
  78         int dotclock;
  79         XF86VidModeGetModeLine(priv->display, screen, &dotclock, &modeline);
  80         orig_mode = VideoMode(modeline.hdisplay, modeline.vdisplay);
  81         if(modeline.htotal && modeline.vtotal)
  82                 orig_mode.rate = dotclock/(modeline.htotal*modeline.vtotal);
  83 #endif
  84 }
  85
  86 Display::~Display()
  87 {
  88         XCloseDisplay(priv->display);
  89         delete priv;
  90 }
  91
  92 void Display::set_mode(const VideoMode &mode)
  93 {
  94 #ifdef WITH_XF86VIDMODE
  95         int screen = DefaultScreen(priv->display);
  96
  97         int nmodes;
  98         XF86VidModeModeInfo **infos;
  99         XF86VidModeGetAllModeLines(priv->display, screen, &nmodes, &infos);
 100         for(int i=0; i<nmodes; ++i)
 101         {
 102                 XF86VidModeModeInfo &info = *infos[i];
 103
 104                 unsigned rate = 0;
 105                 if(info.htotal && info.vtotal)
 106                         rate = info.dotclock/(info.htotal*info.vtotal);
 107                 if(info.hdisplay==mode.width && info.vdisplay==mode.height && (mode.rate==0 || rate==mode.rate))
 108                 {
 109                         XF86VidModeSwitchToMode(priv->display, screen, &info);
 110                         XF86VidModeSetViewPort(priv->display, screen, 0, 0);
 111                         return;
 112                 }
 113         }
 114
 115         throw unsupported_video_mode(mode);
 116 #else
 117         (void)mode;
 118         throw runtime_error("no xf86vidmode support");
 119 #endif
 120 }
 121
 122 bool Display::process_events()
 123 {
 124         int pending = XPending(priv->display);
 125         if(pending==0)
 126                 return false;
 127
 128         for(; pending--;)
 129         {
 130                 Window::Event event;
 131                 XNextEvent(priv->display, &event.xevent);
 132
 133                 check_error();
 134
 135                 map<WindowHandle, Window *>::iterator j = priv->windows.find(event.xevent.xany.window);
 136                 if(j!=priv->windows.end())
 137                 {
 138                         /* Filter keyboard autorepeat.  If this packet is a KeyRelease and
 139                         the next one is a KeyPress with the exact same parameters, they
 140                         indicate autorepeat and must be dropped. */
 141                         if(event.xevent.type==KeyRelease && !j->second->get_keyboard_autorepeat() && pending>0)
 142                         {
 143                                 XKeyEvent &kev = event.xevent.xkey;
 144                                 XEvent ev2;
 145                                 XPeekEvent(priv->display, &ev2);
 146                                 if(ev2.type==KeyPress)
 147                                 {
 148                                         XKeyEvent &kev2 = ev2.xkey;
 149                                         if(kev2.window==kev.window && kev2.time==kev.time && kev2.keycode==kev.keycode)
 150                                         {
 151                                                 XNextEvent(priv->display, &ev2);
 152                                                 --pending;
 153                                                 continue;
 154                                         }
 155                                 }
 156                         }
 157
 158                         j->second->event(event);
 159                 }
 160         }
 161
 162         return true;
 163 }
 164
 165 void Display::check_error()
 166 {
 167         if(error_flag)
 168         {
 169                 error_flag = false;
 170                 throw runtime_error(error_msg);
 171         }
 172 }
 173
 174 } // namespace Msp
 175 } // namespace Graphics