source/graphics/x11/display.cpp

   1 #include <X11/Xlib.h>
   2 #include <X11/Xatom.h>
   3 #ifdef WITH_XRANDR
   4 #include <X11/extensions/Xrandr.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 #ifdef WITH_XRANDR
  42 inline Msp::Graphics::VideoRotation rotation_from_sys(Rotation r)
  43 {
  44         switch(r)
  45         {
  46         case RR_Rotate_90: return Msp::Graphics::ROTATE_RIGHT;
  47         case RR_Rotate_180: return Msp::Graphics::ROTATE_INVERTED;
  48         case RR_Rotate_270: return Msp::Graphics::ROTATE_LEFT;
  49         default: return Msp::Graphics::ROTATE_NORMAL;
  50         }
  51 }
  52
  53 inline Rotation rotation_to_sys(Msp::Graphics::VideoRotation r)
  54 {
  55         switch(r)
  56         {
  57         case Msp::Graphics::ROTATE_RIGHT: return RR_Rotate_90;
  58         case Msp::Graphics::ROTATE_INVERTED: return RR_Rotate_180;
  59         case Msp::Graphics::ROTATE_LEFT: return RR_Rotate_270;
  60         default: return RR_Rotate_0;
  61         }
  62 }
  63
  64 inline bool monitor_x_compare(const Msp::Graphics::Monitor &m1, const Msp::Graphics::Monitor &m2)
  65 {
  66         if(m1.desktop_mode && !m2.desktop_mode)
  67                 return true;
  68         return m1.x<m2.x;
  69 }
  70 #endif
  71
  72 inline unsigned mode_width(const Msp::Graphics::VideoMode &m, Msp::Graphics::VideoRotation r)
  73 {
  74         if(r==Msp::Graphics::ROTATE_RIGHT || r==Msp::Graphics::ROTATE_LEFT)
  75                 return m.height;
  76         else
  77                 return m.width;
  78 }
  79
  80 }
  81
  82
  83 namespace Msp {
  84 namespace Graphics {
  85
  86 Display::Display(const string &disp_name):
  87         primary_monitor(0),
  88         priv(new Private),
  89         focus_window(0)
  90 {
  91         if(disp_name.empty())
  92                 priv->display = XOpenDisplay(0);
  93         else
  94                 priv->display = XOpenDisplay(disp_name.c_str());
  95         if(!priv->display)
  96                 throw runtime_error("XOpenDisplay");
  97
  98         XSetErrorHandler(x_error_handler);
  99
 100         priv->root_window = DefaultRootWindow(priv->display);
 101
 102         err_dialog = new ErrorDialog(this);
 103
 104 #ifdef WITH_XRANDR
 105         int event_base;
 106         int error_base;
 107         if(XRRQueryExtension(priv->display, &event_base, &error_base))
 108         {
 109                 int major, minor;
 110                 XRRQueryVersion(priv->display, &major, &minor);
 111                 if(major>1 || (major==1 && minor>=2))
 112                 {
 113                         XRRScreenResources *res = XRRGetScreenResources(priv->display, priv->root_window);
 114                         RROutput primary = XRRGetOutputPrimary(priv->display, priv->root_window);
 115                         Atom edid_prop = XInternAtom(priv->display, RR_PROPERTY_RANDR_EDID, true);
 116
 117                         map<RRMode, XRRModeInfo *> modes_by_id;
 118                         for(int i=0; i<res->nmode; ++i)
 119                                 modes_by_id[res->modes[i].id] = &res->modes[i];
 120
 121                         for(int i=0; i<res->noutput; ++i)
 122                         {
 123                                 XRROutputInfo *output = XRRGetOutputInfo(priv->display, res, res->outputs[i]);
 124                                 XRRCrtcInfo *crtc = (output->crtc ? XRRGetCrtcInfo(priv->display, res, output->crtc) : 0);
 125
 126                                 monitors.push_back(Monitor());
 127                                 Monitor &monitor = monitors.back();
 128                                 monitor.index = monitors.size()-1;
 129                                 monitor.name.assign(output->name, output->nameLen);
 130                                 priv->monitors.push_back(res->outputs[i]);
 131
 132                                 if(edid_prop)
 133                                 {
 134                                         Atom prop_type;
 135                                         int prop_format;
 136                                         unsigned long length;
 137                                         unsigned long overflow;
 138                                         unsigned char *edid = 0;
 139                                         XRRGetOutputProperty(priv->display, res->outputs[i], edid_prop, 0, 32, false, false, XA_INTEGER, &prop_type, &prop_format, &length, &overflow, &edid);
 140                                         if(prop_type==XA_INTEGER && prop_format==8)
 141                                         {
 142                                                 for(unsigned j=0; j<4; ++j)
 143                                                 {
 144                                                         unsigned offset = 54+j*18;
 145                                                         if(edid[offset]==0 && edid[offset+1]==0 && edid[offset+3]==0xFC)
 146                                                         {
 147                                                                 unsigned k;
 148                                                                 for(k=0; (k<13 && edid[offset+5+k]!=0x0A); ++k) ;
 149                                                                 monitor.name.assign(reinterpret_cast<char *>(edid+offset+5), k);
 150                                                         }
 151                                                 }
 152                                         }
 153                                         XFree(edid);
 154                                 }
 155
 156                                 if(crtc)
 157                                 {
 158                                         monitor.desktop_rotation = rotation_from_sys(crtc->rotation);
 159                                         monitor.current_rotation = monitor.desktop_rotation;
 160                                         monitor.x = crtc->x;
 161                                         monitor.y = crtc->y;
 162                                 }
 163
 164                                 if(res->outputs[i]==primary)
 165                                         primary_monitor = &monitor;
 166
 167                                 for(int j=0; j<output->nmode; ++j)
 168                                 {
 169                                         map<RRMode, XRRModeInfo *>::iterator k = modes_by_id.find(output->modes[j]);
 170                                         if(k==modes_by_id.end())
 171                                                 continue;
 172
 173                                         XRRModeInfo *info = k->second;
 174
 175                                         VideoMode mode(info->width, info->height);
 176                                         mode.index = modes.size();
 177                                         mode.monitor = &monitor;
 178                                         mode.rate = static_cast<float>(info->dotClock)/(info->hTotal*info->vTotal);
 179                                         if(find_mode(mode, 0.01f))
 180                                                 continue;
 181
 182                                         modes.push_back(mode);
 183                                         priv->modes.push_back(info->id);
 184                                         monitor.video_modes.push_back(&modes.back());
 185
 186                                         if(crtc && info->id==crtc->mode)
 187                                         {
 188                                                 monitor.desktop_mode = &modes.back();
 189                                                 monitor.current_mode = monitor.desktop_mode;
 190                                         }
 191                                 }
 192
 193                                 XRRFreeOutputInfo(output);
 194                                 if(crtc)
 195                                         XRRFreeCrtcInfo(crtc);
 196                         }
 197
 198                         XRRFreeScreenResources(res);
 199
 200                         monitors.sort(monitor_x_compare);
 201                         Monitor *prev_enabled = 0;
 202                         for(list<Monitor>::iterator i=monitors.begin(); i!=monitors.end(); ++i)
 203                                 if(i->desktop_mode)
 204                                 {
 205                                         i->next_left = prev_enabled;
 206                                         if(prev_enabled)
 207                                                 prev_enabled->next_right = &*i;
 208                                         prev_enabled = &*i;
 209                                 }
 210
 211                         if(!primary_monitor || !primary_monitor->desktop_mode)
 212                         {
 213                                 // XRandR didn't give a sensible primary monitor.  Try to guess one.
 214                                 unsigned largest = 0;
 215                                 for(list<Monitor>::iterator i=monitors.begin(); i!=monitors.end(); ++i)
 216                                         if(i->desktop_mode)
 217                                         {
 218                                                 unsigned size = i->desktop_mode->width*i->desktop_mode->height;
 219                                                 if(size>largest)
 220                                                 {
 221                                                         largest = size;
 222                                                         primary_monitor = &*i;
 223                                                 }
 224                                         }
 225                         }
 226                 }
 227         }
 228 #endif
 229 }
 230
 231 Display::~Display()
 232 {
 233         XCloseDisplay(priv->display);
 234         delete priv;
 235         delete err_dialog;
 236 }
 237
 238 void Display::set_mode(const VideoMode &requested_mode, bool exclusive)
 239 {
 240 #ifdef WITH_XRANDR
 241         const VideoMode *mode = find_mode(requested_mode);
 242         if(!mode)
 243                 throw unsupported_video_mode(requested_mode);
 244
 245         VideoRotation requested_rotation = requested_mode.rotation;
 246         if(requested_rotation==ROTATE_ANY)
 247                 requested_rotation = mode->monitor->desktop_rotation;
 248
 249         XRRScreenResources *res = XRRGetScreenResources(priv->display, priv->root_window);
 250         RROutput output = priv->monitors[mode->monitor->index];
 251         XRROutputInfo *output_info = XRRGetOutputInfo(priv->display, res, output);
 252
 253         // Check if the output already has a CRTC and find a free one if it doesn't
 254         RRCrtc crtc = output_info->crtc;
 255         XRRCrtcInfo *crtc_info = 0;
 256         if(crtc)
 257                 crtc_info = XRRGetCrtcInfo(priv->display, res, crtc);
 258         else
 259         {
 260                 for(int i=0; i<res->ncrtc; ++i)
 261                 {
 262                         crtc_info = XRRGetCrtcInfo(priv->display, res, res->crtcs[i]);
 263                         if(!crtc_info->noutput)
 264                         {
 265                                 crtc = res->crtcs[i];
 266                                 break;
 267                         }
 268                         XRRFreeCrtcInfo(crtc_info);
 269                 }
 270
 271                 if(!crtc)
 272                 {
 273                         XRRFreeOutputInfo(output_info);
 274                         throw unsupported_video_mode(requested_mode);
 275                 }
 276         }
 277
 278         int x = 0;
 279         int y = 0;
 280
 281         if(exclusive)
 282         {
 283                 // Disable other outputs for exclusive mode
 284                 for(list<Monitor>::iterator i=monitors.begin(); i!=monitors.end(); ++i)
 285                         if(&*i!=mode->monitor)
 286                         {
 287                                 XRROutputInfo *o = XRRGetOutputInfo(priv->display, res, priv->monitors[i->index]);
 288                                 if(o->crtc)
 289                                         XRRSetCrtcConfig(priv->display, res, o->crtc, CurrentTime, 0, 0, 0, RR_Rotate_0, 0, 0);
 290                                 XRRFreeOutputInfo(o);
 291
 292                                 i->current_mode = 0;
 293                                 i->current_rotation = ROTATE_NORMAL;
 294                                 i->x = 0;
 295                                 i->y = 0;
 296                         }
 297         }
 298         else
 299         {
 300                 const Monitor *left = mode->monitor->next_left;
 301                 while(left && !left->current_mode)
 302                         left = left->next_left;
 303
 304                 if(left)
 305                 {
 306                         x = left->x+mode_width(*left->current_mode, left->current_rotation);
 307                         y = left->y;
 308                 }
 309         }
 310
 311         XRRSetCrtcConfig(priv->display, res, crtc, CurrentTime, x, y, priv->modes[mode->index], rotation_to_sys(requested_rotation), &output, 1);
 312
 313         list<Monitor>::iterator i;
 314         for(i=monitors.begin(); i!=monitors.end(); ++i)
 315                 if(&*i==mode->monitor)
 316                 {
 317                         i->current_mode = mode;
 318                         i->current_rotation = requested_rotation;
 319                         i->x = x;
 320                         i->y = y;
 321
 322                         x += mode_width(*mode, requested_rotation);
 323                         ++i;
 324                         break;
 325                 }
 326
 327         for(; i!=monitors.end(); ++i)
 328                 if(i->current_mode)
 329                 {
 330                         XRROutputInfo *o = XRRGetOutputInfo(priv->display, res, priv->monitors[i->index]);
 331                         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);
 332
 333                         XRRPanning panning;
 334                         panning.timestamp = CurrentTime;
 335                         panning.left = x;
 336                         panning.top = y;
 337                         panning.width = i->current_mode->width;
 338                         panning.height = i->current_mode->height;
 339                         panning.track_left = panning.left;
 340                         panning.track_top = panning.top;
 341                         panning.track_width = panning.width;
 342                         panning.track_height = panning.height;
 343                         panning.border_left = 0;
 344                         panning.border_top = 0;
 345                         panning.border_right = 0;
 346                         panning.border_bottom = 0;
 347                         XRRSetPanning(priv->display, res, o->crtc, &panning);
 348
 349                         XRRFreeOutputInfo(o);
 350
 351                         i->x = x;
 352                         i->y = y;
 353
 354                         x += mode_width(*i->current_mode, i->current_rotation);
 355                 }
 356
 357         XRRFreeOutputInfo(output_info);
 358         XRRFreeCrtcInfo(crtc_info);
 359         XRRFreeScreenResources(res);
 360 #else
 361         (void)requested_mode;
 362         (void)exclusive;
 363         throw runtime_error("no xrandr support");
 364 #endif
 365 }
 366
 367 bool Display::process_events()
 368 {
 369         int pending = XPending(priv->display);
 370         if(pending==0)
 371                 return false;
 372
 373         for(; pending--;)
 374         {
 375                 Window::Event event;
 376                 XNextEvent(priv->display, &event.xevent);
 377
 378                 check_error();
 379
 380                 map<WindowHandle, Window *>::iterator j = priv->windows.find(event.xevent.xany.window);
 381                 if(j!=priv->windows.end())
 382                 {
 383                         /* Filter keyboard autorepeat.  If this packet is a KeyRelease and
 384                         the next one is a KeyPress with the exact same parameters, they
 385                         indicate autorepeat and must be dropped. */
 386                         if(event.xevent.type==KeyRelease && !j->second->get_keyboard_autorepeat() && pending>0)
 387                         {
 388                                 XKeyEvent &kev = event.xevent.xkey;
 389                                 XEvent ev2;
 390                                 XPeekEvent(priv->display, &ev2);
 391                                 if(ev2.type==KeyPress)
 392                                 {
 393                                         XKeyEvent &kev2 = ev2.xkey;
 394                                         if(kev2.window==kev.window && kev2.time==kev.time && kev2.keycode==kev.keycode)
 395                                         {
 396                                                 XNextEvent(priv->display, &ev2);
 397                                                 --pending;
 398                                                 continue;
 399                                         }
 400                                 }
 401                         }
 402
 403                         j->second->event(event);
 404                 }
 405         }
 406
 407         return true;
 408 }
 409
 410 void Display::check_error()
 411 {
 412         if(error_flag)
 413         {
 414                 error_flag = false;
 415                 throw runtime_error(error_msg);
 416         }
 417 }
 418
 419 } // namespace Msp
 420 } // namespace Graphics