source/graphics/x11/display.cpp

   1 #include <X11/Xlib.h>
   2 #ifdef WITH_XRANDR
   3 #include <X11/extensions/Xrandr.h>
   4 #endif
   5 #include <msp/io/print.h>
   6 #include <msp/strings/format.h>
   7 #include <msp/strings/lexicalcast.h>
   8 #include "display.h"
   9 #include "display_private.h"
  10
  11 using namespace std;
  12
  13 namespace {
  14
  15 bool error_flag = false;
  16 std::string error_msg;
  17
  18 int x_error_handler(Display *display, XErrorEvent *event)
  19 {
  20         char err[128];
  21         XGetErrorText(display, event->error_code, err, sizeof(err));
  22
  23         string request_code = Msp::lexical_cast<string, int>(event->request_code);
  24         char req[128];
  25         XGetErrorDatabaseText(display, "XRequest", request_code.c_str(), request_code.c_str(), req, sizeof(req));
  26
  27         string msg = Msp::format("Request %s failed with %s [%08X]", req, err, event->resourceid);
  28         if(error_flag)
  29                 Msp::IO::print(Msp::IO::cerr, "Discarding error: %s\n", msg);
  30         else
  31         {
  32                 Msp::IO::print(Msp::IO::cerr, "%s\n", msg);
  33                 error_msg = msg;
  34                 error_flag = true;
  35         }
  36
  37         return 0;
  38 }
  39
  40 #ifdef WITH_XRANDR
  41 inline Msp::Graphics::VideoRotation rotation_from_sys(Rotation r)
  42 {
  43         switch(r)
  44         {
  45         case RR_Rotate_90: return Msp::Graphics::ROTATE_RIGHT;
  46         case RR_Rotate_180: return Msp::Graphics::ROTATE_INVERTED;
  47         case RR_Rotate_270: return Msp::Graphics::ROTATE_LEFT;
  48         default: return Msp::Graphics::ROTATE_NORMAL;
  49         }
  50 }
  51
  52 inline Rotation rotation_to_sys(Msp::Graphics::VideoRotation r)
  53 {
  54         switch(r)
  55         {
  56         case Msp::Graphics::ROTATE_RIGHT: return RR_Rotate_90;
  57         case Msp::Graphics::ROTATE_INVERTED: return RR_Rotate_180;
  58         case Msp::Graphics::ROTATE_LEFT: return RR_Rotate_270;
  59         default: return RR_Rotate_0;
  60         }
  61 }
  62
  63 inline bool monitor_x_compare(const Msp::Graphics::Monitor &m1, const Msp::Graphics::Monitor &m2)
  64 {
  65         if(m1.desktop_mode && !m2.desktop_mode)
  66                 return true;
  67         return m1.x<m2.x;
  68 }
  69 #endif
  70
  71 inline unsigned mode_width(const Msp::Graphics::VideoMode &m, Msp::Graphics::VideoRotation r)
  72 {
  73         if(r==Msp::Graphics::ROTATE_RIGHT || r==Msp::Graphics::ROTATE_LEFT)
  74                 return m.height;
  75         else
  76                 return m.width;
  77 }
  78
  79 }
  80
  81
  82 namespace Msp {
  83 namespace Graphics {
  84
  85 Display::Display(const string &disp_name):
  86         primary_monitor(0),
  87         priv(new Private),
  88         focus_window(0)
  89 {
  90         if(disp_name.empty())
  91                 priv->display = XOpenDisplay(0);
  92         else
  93                 priv->display = XOpenDisplay(disp_name.c_str());
  94         if(!priv->display)
  95                 throw runtime_error("XOpenDisplay");
  96
  97         XSetErrorHandler(x_error_handler);
  98
  99         priv->root_window = DefaultRootWindow(priv->display);
 100
 101         err_dialog = new ErrorDialog(this);
 102
 103 #ifdef WITH_XRANDR
 104         int event_base;
 105         int error_base;
 106         if(XRRQueryExtension(priv->display, &event_base, &error_base))
 107         {
 108                 int major, minor;
 109                 XRRQueryVersion(priv->display, &major, &minor);
 110                 if(major>1 || (major==1 && minor>=2))
 111                 {
 112                         XRRScreenResources *res = XRRGetScreenResources(priv->display, priv->root_window);
 113                         RROutput primary = XRRGetOutputPrimary(priv->display, priv->root_window);
 114
 115                         map<RRMode, XRRModeInfo *> modes_by_id;
 116                         for(int i=0; i<res->nmode; ++i)
 117                                 modes_by_id[res->modes[i].id] = &res->modes[i];
 118
 119                         for(int i=0; i<res->noutput; ++i)
 120                         {
 121                                 XRROutputInfo *output = XRRGetOutputInfo(priv->display, res, res->outputs[i]);
 122                                 XRRCrtcInfo *crtc = (output->crtc ? XRRGetCrtcInfo(priv->display, res, output->crtc) : 0);
 123
 124                                 monitors.push_back(Monitor());
 125                                 Monitor &monitor = monitors.back();
 126                                 monitor.index = monitors.size()-1;
 127                                 monitor.name.assign(output->name, output->nameLen);
 128                                 priv->monitors.push_back(res->outputs[i]);
 129
 130                                 if(crtc)
 131                                 {
 132                                         monitor.desktop_rotation = rotation_from_sys(crtc->rotation);
 133                                         monitor.current_rotation = monitor.desktop_rotation;
 134                                         monitor.x = crtc->x;
 135                                         monitor.y = crtc->y;
 136                                 }
 137
 138                                 if(res->outputs[i]==primary)
 139                                         primary_monitor = &monitor;
 140
 141                                 for(int j=0; j<output->nmode; ++j)
 142                                 {
 143                                         map<RRMode, XRRModeInfo *>::iterator k = modes_by_id.find(output->modes[j]);
 144                                         if(k==modes_by_id.end())
 145                                                 continue;
 146
 147                                         XRRModeInfo *info = k->second;
 148
 149                                         VideoMode mode(info->width, info->height);
 150                                         mode.index = modes.size();
 151                                         mode.monitor = &monitor;
 152                                         mode.rate = static_cast<float>(info->dotClock)/(info->hTotal*info->vTotal);
 153                                         if(find_mode(mode, 0.01f))
 154                                                 continue;
 155
 156                                         modes.push_back(mode);
 157                                         priv->modes.push_back(info->id);
 158                                         monitor.video_modes.push_back(&modes.back());
 159
 160                                         if(crtc && info->id==crtc->mode)
 161                                         {
 162                                                 monitor.desktop_mode = &modes.back();
 163                                                 monitor.current_mode = monitor.desktop_mode;
 164                                         }
 165                                 }
 166
 167                                 XRRFreeOutputInfo(output);
 168                                 if(crtc)
 169                                         XRRFreeCrtcInfo(crtc);
 170                         }
 171
 172                         XRRFreeScreenResources(res);
 173
 174                         monitors.sort(monitor_x_compare);
 175                         Monitor *prev_enabled = 0;
 176                         for(list<Monitor>::iterator i=monitors.begin(); i!=monitors.end(); ++i)
 177                                 if(i->desktop_mode)
 178                                 {
 179                                         i->next_left = prev_enabled;
 180                                         if(prev_enabled)
 181                                                 prev_enabled->next_right = &*i;
 182                                         prev_enabled = &*i;
 183                                 }
 184
 185                         if(!primary_monitor || !primary_monitor->desktop_mode)
 186                         {
 187                                 // XRandR didn't give a sensible primary monitor.  Try to guess one.
 188                                 unsigned largest = 0;
 189                                 for(list<Monitor>::iterator i=monitors.begin(); i!=monitors.end(); ++i)
 190                                         if(i->desktop_mode)
 191                                         {
 192                                                 unsigned size = i->desktop_mode->width*i->desktop_mode->height;
 193                                                 if(size>largest)
 194                                                 {
 195                                                         largest = size;
 196                                                         primary_monitor = &*i;
 197                                                 }
 198                                         }
 199                         }
 200                 }
 201         }
 202 #endif
 203 }
 204
 205 Display::~Display()
 206 {
 207         XCloseDisplay(priv->display);
 208         delete priv;
 209         delete err_dialog;
 210 }
 211
 212 void Display::set_mode(const VideoMode &requested_mode, bool exclusive)
 213 {
 214 #ifdef WITH_XRANDR
 215         const VideoMode *mode = find_mode(requested_mode);
 216         if(!mode)
 217                 throw unsupported_video_mode(requested_mode);
 218
 219         VideoRotation requested_rotation = requested_mode.rotation;
 220         if(requested_rotation==ROTATE_ANY)
 221                 requested_rotation = mode->monitor->desktop_rotation;
 222
 223         XRRScreenResources *res = XRRGetScreenResources(priv->display, priv->root_window);
 224         RROutput output = priv->monitors[mode->monitor->index];
 225         XRROutputInfo *output_info = XRRGetOutputInfo(priv->display, res, output);
 226
 227         // Check if the output already has a CRTC and find a free one if it doesn't
 228         RRCrtc crtc = output_info->crtc;
 229         XRRCrtcInfo *crtc_info = 0;
 230         if(crtc)
 231                 crtc_info = XRRGetCrtcInfo(priv->display, res, crtc);
 232         else
 233         {
 234                 for(int i=0; i<res->ncrtc; ++i)
 235                 {
 236                         crtc_info = XRRGetCrtcInfo(priv->display, res, res->crtcs[i]);
 237                         if(!crtc_info->noutput)
 238                         {
 239                                 crtc = res->crtcs[i];
 240                                 break;
 241                         }
 242                         XRRFreeCrtcInfo(crtc_info);
 243                 }
 244
 245                 if(!crtc)
 246                 {
 247                         XRRFreeOutputInfo(output_info);
 248                         throw unsupported_video_mode(requested_mode);
 249                 }
 250         }
 251
 252         int x = 0;
 253         int y = 0;
 254
 255         if(exclusive)
 256         {
 257                 // Disable other outputs for exclusive mode
 258                 for(list<Monitor>::iterator i=monitors.begin(); i!=monitors.end(); ++i)
 259                         if(&*i!=mode->monitor)
 260                         {
 261                                 XRROutputInfo *o = XRRGetOutputInfo(priv->display, res, priv->monitors[i->index]);
 262                                 if(o->crtc)
 263                                         XRRSetCrtcConfig(priv->display, res, o->crtc, CurrentTime, 0, 0, 0, RR_Rotate_0, 0, 0);
 264                                 XRRFreeOutputInfo(o);
 265
 266                                 i->current_mode = 0;
 267                                 i->current_rotation = ROTATE_NORMAL;
 268                                 i->x = 0;
 269                                 i->y = 0;
 270                         }
 271         }
 272         else
 273         {
 274                 const Monitor *left = mode->monitor->next_left;
 275                 while(left && !left->current_mode)
 276                         left = left->next_left;
 277
 278                 if(left)
 279                 {
 280                         x = left->x+mode_width(*left->current_mode, left->current_rotation);
 281                         y = left->y;
 282                 }
 283         }
 284
 285         XRRSetCrtcConfig(priv->display, res, crtc, CurrentTime, x, y, priv->modes[mode->index], rotation_to_sys(requested_rotation), &output, 1);
 286
 287         list<Monitor>::iterator i;
 288         for(i=monitors.begin(); i!=monitors.end(); ++i)
 289                 if(&*i==mode->monitor)
 290                 {
 291                         i->current_mode = mode;
 292                         i->current_rotation = requested_rotation;
 293                         i->x = x;
 294                         i->y = y;
 295
 296                         x += mode_width(*mode, requested_rotation);
 297                         ++i;
 298                         break;
 299                 }
 300
 301         for(; i!=monitors.end(); ++i)
 302                 if(i->current_mode)
 303                 {
 304                         XRROutputInfo *o = XRRGetOutputInfo(priv->display, res, priv->monitors[i->index]);
 305                         XRRSetCrtcConfig(priv->display, res, o->crtc, CurrentTime, x, y, priv->modes[i->current_mode->index], rotation_to_sys(i->current_rotation), &priv->monitors[i->index], 1);
 306
 307                         XRRPanning panning;
 308                         panning.timestamp = CurrentTime;
 309                         panning.left = x;
 310                         panning.top = y;
 311                         panning.width = i->current_mode->width;
 312                         panning.height = i->current_mode->height;
 313                         panning.track_left = panning.left;
 314                         panning.track_top = panning.top;
 315                         panning.track_width = panning.width;
 316                         panning.track_height = panning.height;
 317                         panning.border_left = 0;
 318                         panning.border_top = 0;
 319                         panning.border_right = 0;
 320                         panning.border_bottom = 0;
 321                         XRRSetPanning(priv->display, res, o->crtc, &panning);
 322
 323                         XRRFreeOutputInfo(o);
 324
 325                         i->x = x;
 326                         i->y = y;
 327
 328                         x += mode_width(*i->current_mode, i->current_rotation);
 329                 }
 330
 331         XRRFreeOutputInfo(output_info);
 332         XRRFreeCrtcInfo(crtc_info);
 333         XRRFreeScreenResources(res);
 334 #else
 335         (void)requested_mode;
 336         (void)exclusive;
 337         throw runtime_error("no xrandr support");
 338 #endif
 339 }
 340
 341 bool Display::process_events()
 342 {
 343         int pending = XPending(priv->display);
 344         if(pending==0)
 345                 return false;
 346
 347         for(; pending--;)
 348         {
 349                 Window::Event event;
 350                 XNextEvent(priv->display, &event.xevent);
 351
 352                 check_error();
 353
 354                 map<WindowHandle, Window *>::iterator j = priv->windows.find(event.xevent.xany.window);
 355                 if(j!=priv->windows.end())
 356                 {
 357                         /* Filter keyboard autorepeat.  If this packet is a KeyRelease and
 358                         the next one is a KeyPress with the exact same parameters, they
 359                         indicate autorepeat and must be dropped. */
 360                         if(event.xevent.type==KeyRelease && !j->second->get_keyboard_autorepeat() && pending>0)
 361                         {
 362                                 XKeyEvent &kev = event.xevent.xkey;
 363                                 XEvent ev2;
 364                                 XPeekEvent(priv->display, &ev2);
 365                                 if(ev2.type==KeyPress)
 366                                 {
 367                                         XKeyEvent &kev2 = ev2.xkey;
 368                                         if(kev2.window==kev.window && kev2.time==kev.time && kev2.keycode==kev.keycode)
 369                                         {
 370                                                 XNextEvent(priv->display, &ev2);
 371                                                 --pending;
 372                                                 continue;
 373                                         }
 374                                 }
 375                         }
 376
 377                         j->second->event(event);
 378                 }
 379         }
 380
 381         return true;
 382 }
 383
 384 void Display::check_error()
 385 {
 386         if(error_flag)
 387         {
 388                 error_flag = false;
 389                 throw runtime_error(error_msg);
 390         }
 391 }
 392
 393 } // namespace Msp
 394 } // namespace Graphics