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_settings.mode && !m2.desktop_settings.mode)
  67                 return true;
  68         return m1.desktop_settings.x<m2.desktop_settings.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_settings.rotation = rotation_from_sys(crtc->rotation);
 159                                         monitor.desktop_settings.x = crtc->x;
 160                                         monitor.desktop_settings.y = crtc->y;
 161                                 }
 162
 163                                 if(res->outputs[i]==primary)
 164                                         primary_monitor = &monitor;
 165
 166                                 for(int j=0; j<output->nmode; ++j)
 167                                 {
 168                                         auto k = modes_by_id.find(output->modes[j]);
 169                                         if(k==modes_by_id.end())
 170                                                 continue;
 171
 172                                         XRRModeInfo *info = k->second;
 173
 174                                         VideoMode mode(info->width, info->height);
 175                                         mode.index = modes.size();
 176                                         mode.monitor = &monitor;
 177                                         mode.rate = static_cast<float>(info->dotClock)/(info->hTotal*info->vTotal);
 178                                         if(find_mode(mode, 0.01f))
 179                                                 continue;
 180
 181                                         modes.push_back(mode);
 182                                         priv->modes.push_back(info->id);
 183                                         monitor.video_modes.push_back(&modes.back());
 184
 185                                         if(crtc && info->id==crtc->mode)
 186                                                 monitor.desktop_settings.mode = &modes.back();
 187                                 }
 188
 189                                 monitor.current_settings = monitor.desktop_settings;
 190
 191                                 XRRFreeOutputInfo(output);
 192                                 if(crtc)
 193                                         XRRFreeCrtcInfo(crtc);
 194                         }
 195
 196                         XRRFreeScreenResources(res);
 197
 198                         monitors.sort(monitor_x_compare);
 199                         Monitor *prev_enabled = 0;
 200                         for(Monitor &m: monitors)
 201                                 if(m.desktop_settings.mode)
 202                                 {
 203                                         m.next_left = prev_enabled;
 204                                         if(prev_enabled)
 205                                                 prev_enabled->next_right = &m;
 206                                         prev_enabled = &m;
 207                                 }
 208
 209                         if(!primary_monitor || !primary_monitor->desktop_settings.mode)
 210                         {
 211                                 // XRandR didn't give a sensible primary monitor.  Try to guess one.
 212                                 unsigned largest = 0;
 213                                 for(Monitor &m: monitors)
 214                                         if(const VideoMode *desktop_mode = m.desktop_settings.mode)
 215                                         {
 216                                                 unsigned size = desktop_mode->width*desktop_mode->height;
 217                                                 if(size>largest)
 218                                                 {
 219                                                         largest = size;
 220                                                         primary_monitor = &m;
 221                                                 }
 222                                         }
 223                         }
 224                 }
 225         }
 226 #endif
 227 }
 228
 229 Display::~Display()
 230 {
 231         XCloseDisplay(priv->display);
 232         delete priv;
 233         delete err_dialog;
 234 }
 235
 236 void Display::set_mode(const VideoMode &requested_mode, bool exclusive)
 237 {
 238 #ifdef WITH_XRANDR
 239         const VideoMode *mode = find_mode(requested_mode);
 240         if(!mode)
 241                 throw unsupported_video_mode(requested_mode);
 242
 243         VideoRotation requested_rotation = requested_mode.rotation;
 244         if(requested_rotation==ROTATE_ANY)
 245                 requested_rotation = mode->monitor->desktop_settings.rotation;
 246
 247         XRRScreenResources *res = XRRGetScreenResources(priv->display, priv->root_window);
 248         RROutput output = priv->monitors[mode->monitor->index];
 249         XRROutputInfo *output_info = XRRGetOutputInfo(priv->display, res, output);
 250
 251         // Check if the output already has a CRTC and find a free one if it doesn't
 252         RRCrtc crtc = output_info->crtc;
 253         XRRCrtcInfo *crtc_info = 0;
 254         if(crtc)
 255                 crtc_info = XRRGetCrtcInfo(priv->display, res, crtc);
 256         else
 257         {
 258                 for(int i=0; i<res->ncrtc; ++i)
 259                 {
 260                         crtc_info = XRRGetCrtcInfo(priv->display, res, res->crtcs[i]);
 261                         if(!crtc_info->noutput)
 262                         {
 263                                 crtc = res->crtcs[i];
 264                                 break;
 265                         }
 266                         XRRFreeCrtcInfo(crtc_info);
 267                 }
 268
 269                 if(!crtc)
 270                 {
 271                         XRRFreeOutputInfo(output_info);
 272                         throw unsupported_video_mode(requested_mode);
 273                 }
 274         }
 275
 276         /* Due to the semantics of find_mode, the mode's monitor pointer must point
 277         to one of the elements of the monitors list, which is non-const here. */
 278         Monitor *monitor = const_cast<Monitor *>(mode->monitor);
 279
 280         if(exclusive)
 281         {
 282                 monitor->current_settings.mode = mode;
 283                 monitor->current_settings.rotation = requested_rotation;
 284                 monitor->current_settings.x = 0;
 285                 monitor->current_settings.y = 0;
 286
 287                 // Disable other outputs for exclusive mode
 288                 for(Monitor &m: monitors)
 289                         if(&m!=mode->monitor)
 290                         {
 291                                 XRROutputInfo *o = XRRGetOutputInfo(priv->display, res, priv->monitors[m.index]);
 292                                 if(o->crtc)
 293                                         XRRSetCrtcConfig(priv->display, res, o->crtc, CurrentTime, 0, 0, 0, RR_Rotate_0, 0, 0);
 294                                 XRRFreeOutputInfo(o);
 295
 296                                 m.current_settings.mode = 0;
 297                                 m.current_settings.rotation = ROTATE_NORMAL;
 298                                 m.current_settings.x = 0;
 299                                 m.current_settings.y = 0;
 300                         }
 301         }
 302         else
 303         {
 304                 monitor->current_settings.x = monitor->desktop_settings.x;
 305                 monitor->current_settings.y = monitor->desktop_settings.y;
 306         }
 307
 308         RRMode mode_id = priv->modes[mode->index];
 309         int x = monitor->current_settings.x;
 310         int y = monitor->current_settings.y;
 311         Rotation sys_rot = rotation_to_sys(requested_rotation);
 312         XRRSetCrtcConfig(priv->display, res, crtc, CurrentTime, x, y, mode_id, sys_rot, &output, 1);
 313
 314         XRRFreeOutputInfo(output_info);
 315         XRRFreeCrtcInfo(crtc_info);
 316         XRRFreeScreenResources(res);
 317 #else
 318         (void)requested_mode;
 319         (void)exclusive;
 320         throw runtime_error("no xrandr support");
 321 #endif
 322 }
 323
 324 bool Display::process_events()
 325 {
 326         int pending = XPending(priv->display);
 327         if(pending==0)
 328                 return false;
 329
 330         for(; pending--;)
 331         {
 332                 Window::Event event;
 333                 XNextEvent(priv->display, &event.xevent);
 334
 335                 check_error();
 336
 337                 auto j = priv->windows.find(event.xevent.xany.window);
 338                 if(j!=priv->windows.end())
 339                 {
 340                         /* Filter keyboard autorepeat.  If this packet is a KeyRelease and
 341                         the next one is a KeyPress with the exact same parameters, they
 342                         indicate autorepeat and must be dropped. */
 343                         if(event.xevent.type==KeyRelease && !j->second->get_keyboard_autorepeat() && pending>0)
 344                         {
 345                                 XKeyEvent &kev = event.xevent.xkey;
 346                                 XEvent ev2;
 347                                 XPeekEvent(priv->display, &ev2);
 348                                 if(ev2.type==KeyPress)
 349                                 {
 350                                         XKeyEvent &kev2 = ev2.xkey;
 351                                         if(kev2.window==kev.window && kev2.time==kev.time && kev2.keycode==kev.keycode)
 352                                         {
 353                                                 XNextEvent(priv->display, &ev2);
 354                                                 --pending;
 355                                                 continue;
 356                                         }
 357                                 }
 358                         }
 359
 360                         j->second->event(event);
 361                 }
 362         }
 363
 364         return true;
 365 }
 366
 367 void Display::check_error()
 368 {
 369         if(error_flag)
 370         {
 371                 error_flag = false;
 372                 throw runtime_error(error_msg);
 373         }
 374 }
 375
 376 } // namespace Msp
 377 } // namespace Graphics