source/graphics/x11/display.cpp

   1 #include <iostream>
   2 #include <X11/Xlib.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 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 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
  70 inline unsigned mode_width(const Msp::Graphics::VideoMode &m, Msp::Graphics::VideoRotation r)
  71 {
  72         if(r==Msp::Graphics::ROTATE_RIGHT || r==Msp::Graphics::ROTATE_LEFT)
  73                 return m.height;
  74         else
  75                 return m.width;
  76 }
  77
  78 }
  79
  80
  81 namespace Msp {
  82 namespace Graphics {
  83
  84 Display::Display(const string &disp_name):
  85         primary_monitor(0),
  86         priv(new Private)
  87 {
  88         if(disp_name.empty())
  89                 priv->display = XOpenDisplay(0);
  90         else
  91                 priv->display = XOpenDisplay(disp_name.c_str());
  92         if(!priv->display)
  93                 throw runtime_error("XOpenDisplay");
  94
  95         XSetErrorHandler(x_error_handler);
  96
  97         err_dialog = new ErrorDialog(this);
  98
  99 #ifdef WITH_XRANDR
 100         int event_base;
 101         int error_base;
 102         if(XRRQueryExtension(priv->display, &event_base, &error_base))
 103         {
 104                 int major, minor;
 105                 XRRQueryVersion(priv->display, &major, &minor);
 106                 if(major>1 || (major==1 && minor>=2))
 107                 {
 108                         WindowHandle root = DefaultRootWindow(priv->display);
 109                         XRRScreenResources *res = XRRGetScreenResources(priv->display, root);
 110                         RROutput primary = XRRGetOutputPrimary(priv->display, root);
 111
 112                         map<RRMode, XRRModeInfo *> modes_by_id;
 113                         for(int i=0; i<res->nmode; ++i)
 114                                 modes_by_id[res->modes[i].id] = &res->modes[i];
 115
 116                         for(int i=0; i<res->noutput; ++i)
 117                         {
 118                                 XRROutputInfo *output = XRRGetOutputInfo(priv->display, res, res->outputs[i]);
 119                                 XRRCrtcInfo *crtc = (output->crtc ? XRRGetCrtcInfo(priv->display, res, output->crtc) : 0);
 120
 121                                 monitors.push_back(Monitor());
 122                                 Monitor &monitor = monitors.back();
 123                                 monitor.index = monitors.size()-1;
 124                                 priv->monitors.push_back(res->outputs[i]);
 125
 126                                 if(crtc)
 127                                 {
 128                                         monitor.desktop_rotation = rotation_from_sys(crtc->rotation);
 129                                         monitor.current_rotation = monitor.desktop_rotation;
 130                                         monitor.x = crtc->x;
 131                                         monitor.y = crtc->y;
 132                                 }
 133
 134                                 if(res->outputs[i]==primary)
 135                                         primary_monitor = &monitor;
 136
 137                                 for(int j=0; j<output->nmode; ++j)
 138                                 {
 139                                         map<RRMode, XRRModeInfo *>::iterator k = modes_by_id.find(output->modes[j]);
 140                                         if(k==modes_by_id.end())
 141                                                 continue;
 142
 143                                         XRRModeInfo *info = k->second;
 144
 145                                         VideoMode mode(info->width, info->height);
 146                                         mode.index = modes.size();
 147                                         mode.monitor = &monitor;
 148                                         mode.rate = info->dotClock/(info->hTotal*info->vTotal);
 149                                         if(find_mode(mode))
 150                                                 continue;
 151
 152                                         modes.push_back(mode);
 153                                         priv->modes.push_back(info->id);
 154                                         monitor.video_modes.push_back(&modes.back());
 155
 156                                         if(crtc && info->id==crtc->mode)
 157                                         {
 158                                                 monitor.desktop_mode = &modes.back();
 159                                                 monitor.current_mode = monitor.desktop_mode;
 160                                         }
 161                                 }
 162
 163                                 XRRFreeOutputInfo(output);
 164                                 if(crtc)
 165                                         XRRFreeCrtcInfo(crtc);
 166                         }
 167
 168                         XRRFreeScreenResources(res);
 169
 170                         monitors.sort(monitor_x_compare);
 171                         Monitor *prev_enabled = 0;
 172                         for(list<Monitor>::iterator i=monitors.begin(); i!=monitors.end(); ++i)
 173                                 if(i->desktop_mode)
 174                                 {
 175                                         i->next_left = prev_enabled;
 176                                         if(prev_enabled)
 177                                                 prev_enabled->next_right = &*i;
 178                                         prev_enabled = &*i;
 179                                 }
 180
 181                         if(!primary_monitor || !primary_monitor->desktop_mode)
 182                         {
 183                                 // XRandR didn't give a sensible primary monitor.  Try to guess one.
 184                                 unsigned largest = 0;
 185                                 for(list<Monitor>::iterator i=monitors.begin(); i!=monitors.end(); ++i)
 186                                         if(i->desktop_mode)
 187                                         {
 188                                                 unsigned size = i->desktop_mode->width*i->desktop_mode->height;
 189                                                 if(size>largest)
 190                                                 {
 191                                                         largest = size;
 192                                                         primary_monitor = &*i;
 193                                                 }
 194                                         }
 195                         }
 196                 }
 197         }
 198 #endif
 199 }
 200
 201 Display::~Display()
 202 {
 203         XCloseDisplay(priv->display);
 204         delete priv;
 205         delete err_dialog;
 206 }
 207
 208 void Display::set_mode(const VideoMode &requested_mode, bool exclusive)
 209 {
 210 #ifdef WITH_XRANDR
 211         const VideoMode *mode = find_mode(requested_mode);
 212         if(!mode)
 213                 throw unsupported_video_mode(requested_mode);
 214
 215         VideoRotation requested_rotation = requested_mode.rotation;
 216         if(requested_rotation==ROTATE_ANY)
 217                 requested_rotation = mode->monitor->desktop_rotation;
 218
 219         WindowHandle root = DefaultRootWindow(priv->display);
 220         XRRScreenResources *res = XRRGetScreenResources(priv->display, root);
 221         RROutput output = priv->monitors[mode->monitor->index];
 222         XRROutputInfo *output_info = XRRGetOutputInfo(priv->display, res, output);
 223
 224         // Check if the output already has a CRTC and find a free one if it doesn't
 225         RRCrtc crtc = output_info->crtc;
 226         XRRCrtcInfo *crtc_info = 0;
 227         if(crtc)
 228                 crtc_info = XRRGetCrtcInfo(priv->display, res, crtc);
 229         else
 230         {
 231                 for(int i=0; i<res->ncrtc; ++i)
 232                 {
 233                         crtc_info = XRRGetCrtcInfo(priv->display, res, res->crtcs[i]);
 234                         if(!crtc_info->noutput)
 235                         {
 236                                 crtc = res->crtcs[i];
 237                                 break;
 238                         }
 239                         XRRFreeCrtcInfo(crtc_info);
 240                 }
 241
 242                 if(!crtc)
 243                 {
 244                         XRRFreeOutputInfo(output_info);
 245                         throw unsupported_video_mode(requested_mode);
 246                 }
 247         }
 248
 249         int x = 0;
 250         int y = 0;
 251
 252         if(exclusive)
 253         {
 254                 // Disable other outputs for exclusive mode
 255                 for(list<Monitor>::iterator i=monitors.begin(); i!=monitors.end(); ++i)
 256                         if(&*i!=mode->monitor)
 257                         {
 258                                 XRROutputInfo *o = XRRGetOutputInfo(priv->display, res, priv->monitors[i->index]);
 259                                 if(o->crtc)
 260                                         XRRSetCrtcConfig(priv->display, res, o->crtc, CurrentTime, 0, 0, 0, RR_Rotate_0, 0, 0);
 261                                 XRRFreeOutputInfo(o);
 262
 263                                 i->current_mode = 0;
 264                                 i->current_rotation = ROTATE_NORMAL;
 265                                 i->x = 0;
 266                                 i->y = 0;
 267                         }
 268         }
 269         else
 270         {
 271                 const Monitor *left = mode->monitor->next_left;
 272                 while(left && !left->current_mode)
 273                         left = left->next_left;
 274
 275                 if(left)
 276                 {
 277                         x = left->x+mode_width(*left->current_mode, left->current_rotation);
 278                         y = left->y;
 279                 }
 280         }
 281
 282         XRRSetCrtcConfig(priv->display, res, crtc, CurrentTime, x, y, priv->modes[mode->index], rotation_to_sys(requested_rotation), &output, 1);
 283
 284         list<Monitor>::iterator i;
 285         for(i=monitors.begin(); i!=monitors.end(); ++i)
 286                 if(&*i==mode->monitor)
 287                 {
 288                         i->current_mode = mode;
 289                         i->current_rotation = requested_rotation;
 290                         i->x = x;
 291                         i->y = y;
 292
 293                         x += mode_width(*mode, requested_rotation);
 294                         ++i;
 295                         break;
 296                 }
 297
 298         for(; i!=monitors.end(); ++i)
 299                 if(i->current_mode)
 300                 {
 301                         XRROutputInfo *o = XRRGetOutputInfo(priv->display, res, priv->monitors[i->index]);
 302                         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);
 303                         XRRFreeOutputInfo(o);
 304
 305                         i->x = x;
 306                         i->y = y;
 307
 308                         x += mode_width(*i->current_mode, i->current_rotation);
 309                 }
 310
 311         XRRFreeOutputInfo(output_info);
 312         XRRFreeCrtcInfo(crtc_info);
 313         XRRFreeScreenResources(res);
 314 #else
 315         (void)requested_mode;
 316         (void)exclusive;
 317         throw runtime_error("no xrandr support");
 318 #endif
 319 }
 320
 321 bool Display::process_events()
 322 {
 323         int pending = XPending(priv->display);
 324         if(pending==0)
 325                 return false;
 326
 327         for(; pending--;)
 328         {
 329                 Window::Event event;
 330                 XNextEvent(priv->display, &event.xevent);
 331
 332                 check_error();
 333
 334                 map<WindowHandle, Window *>::iterator j = priv->windows.find(event.xevent.xany.window);
 335                 if(j!=priv->windows.end())
 336                 {
 337                         /* Filter keyboard autorepeat.  If this packet is a KeyRelease and
 338                         the next one is a KeyPress with the exact same parameters, they
 339                         indicate autorepeat and must be dropped. */
 340                         if(event.xevent.type==KeyRelease && !j->second->get_keyboard_autorepeat() && pending>0)
 341                         {
 342                                 XKeyEvent &kev = event.xevent.xkey;
 343                                 XEvent ev2;
 344                                 XPeekEvent(priv->display, &ev2);
 345                                 if(ev2.type==KeyPress)
 346                                 {
 347                                         XKeyEvent &kev2 = ev2.xkey;
 348                                         if(kev2.window==kev.window && kev2.time==kev.time && kev2.keycode==kev.keycode)
 349                                         {
 350                                                 XNextEvent(priv->display, &ev2);
 351                                                 --pending;
 352                                                 continue;
 353                                         }
 354                                 }
 355                         }
 356
 357                         j->second->event(event);
 358                 }
 359         }
 360
 361         return true;
 362 }
 363
 364 void Display::check_error()
 365 {
 366         if(error_flag)
 367         {
 368                 error_flag = false;
 369                 throw runtime_error(error_msg);
 370         }
 371 }
 372
 373 } // namespace Msp
 374 } // namespace Graphics