2 #include "display_private.h"
6 #include <X11/extensions/Xrandr.h>
8 #include <msp/core/algorithm.h>
9 #include <msp/io/print.h>
10 #include <msp/strings/format.h>
11 #include <msp/strings/lexicalcast.h>
17 bool error_flag = false;
20 int x_error_handler(Display *display, XErrorEvent *event)
23 XGetErrorText(display, event->error_code, err, sizeof(err));
25 string request_code = Msp::lexical_cast<string, int>(event->request_code);
27 XGetErrorDatabaseText(display, "XRequest", request_code.c_str(), request_code.c_str(), req, sizeof(req));
29 string msg = Msp::format("Request %s failed with %s [%08X]", req, err, event->resourceid);
31 Msp::IO::print(Msp::IO::cerr, "Discarding error: %s\n", msg);
34 Msp::IO::print(Msp::IO::cerr, "%s\n", msg);
43 inline Msp::Graphics::VideoRotation rotation_from_sys(Rotation r)
47 case RR_Rotate_90: return Msp::Graphics::ROTATE_RIGHT;
48 case RR_Rotate_180: return Msp::Graphics::ROTATE_INVERTED;
49 case RR_Rotate_270: return Msp::Graphics::ROTATE_LEFT;
50 default: return Msp::Graphics::ROTATE_NORMAL;
54 inline Rotation rotation_to_sys(Msp::Graphics::VideoRotation r)
58 case Msp::Graphics::ROTATE_RIGHT: return RR_Rotate_90;
59 case Msp::Graphics::ROTATE_INVERTED: return RR_Rotate_180;
60 case Msp::Graphics::ROTATE_LEFT: return RR_Rotate_270;
61 default: return RR_Rotate_0;
72 Display::Display(const string &disp_name):
76 priv->display = XOpenDisplay(nullptr);
78 priv->display = XOpenDisplay(disp_name.c_str());
80 throw runtime_error("XOpenDisplay");
82 XSetErrorHandler(x_error_handler);
84 priv->root_window = DefaultRootWindow(priv->display);
86 err_dialog = new ErrorDialog(this);
91 if(XRRQueryExtension(priv->display, &event_base, &error_base))
94 XRRQueryVersion(priv->display, &major, &minor);
95 if(major>1 || (major==1 && minor>=2))
97 XRRScreenResources *res = XRRGetScreenResources(priv->display, priv->root_window);
98 RROutput primary = XRRGetOutputPrimary(priv->display, priv->root_window);
99 Atom edid_prop = XInternAtom(priv->display, RR_PROPERTY_RANDR_EDID, true);
101 map<RRMode, XRRModeInfo *> modes_by_id;
102 for(int i=0; i<res->nmode; ++i)
103 modes_by_id[res->modes[i].id] = &res->modes[i];
105 int primary_index = -1;
106 vector<unsigned> mode_monitor_indices;
107 vector<int> desktop_mode_indices;
108 for(int i=0; i<res->noutput; ++i)
110 XRROutputInfo *output = XRRGetOutputInfo(priv->display, res, res->outputs[i]);
111 XRRCrtcInfo *crtc = (output->crtc ? XRRGetCrtcInfo(priv->display, res, output->crtc) : nullptr);
113 monitors.push_back(Monitor());
114 Monitor &monitor = monitors.back();
115 monitor.index = monitors.size()-1;
116 monitor.name.assign(output->name, output->nameLen);
117 priv->monitors.push_back(res->outputs[i]);
123 unsigned long length;
124 unsigned long overflow;
125 unsigned char *edid = nullptr;
126 XRRGetOutputProperty(priv->display, res->outputs[i], edid_prop, 0, 32, false, false, XA_INTEGER, &prop_type, &prop_format, &length, &overflow, &edid);
127 if(prop_type==XA_INTEGER && prop_format==8)
129 for(unsigned j=0; j<4; ++j)
131 unsigned offset = 54+j*18;
132 if(edid[offset]==0 && edid[offset+1]==0 && edid[offset+3]==0xFC)
135 for(k=0; (k<13 && edid[offset+5+k]!=0x0A); ++k) ;
136 monitor.name.assign(reinterpret_cast<char *>(edid+offset+5), k);
145 monitor.desktop_settings.rotation = rotation_from_sys(crtc->rotation);
146 monitor.desktop_settings.x = crtc->x;
147 monitor.desktop_settings.y = crtc->y;
150 if(res->outputs[i]==primary)
151 primary_index = monitor.index;
153 unsigned first_mode = modes.size();
154 int desktop_mode_index = -1;
155 for(int j=0; j<output->nmode; ++j)
157 auto k = modes_by_id.find(output->modes[j]);
158 if(k==modes_by_id.end())
161 XRRModeInfo *info = k->second;
162 float rate = static_cast<float>(info->dotClock)/(info->hTotal*info->vTotal);
164 if(any_of(modes.begin()+first_mode, modes.end(), [&info, rate](const VideoMode &m){
165 return (m.width==info->width && m.height==info->height && abs(m.rate-rate)<0.01f);
169 VideoMode mode(info->width, info->height);
170 mode.index = modes.size();
173 modes.push_back(mode);
174 priv->modes.push_back(info->id);
175 mode_monitor_indices.push_back(monitor.index);
177 if(crtc && info->id==crtc->mode)
178 desktop_mode_index = mode.index;
180 desktop_mode_indices.push_back(desktop_mode_index);
182 XRRFreeOutputInfo(output);
184 XRRFreeCrtcInfo(crtc);
187 XRRFreeScreenResources(res);
189 for(unsigned i=0; i<monitors.size(); ++i)
191 int j = desktop_mode_indices[i];
193 monitors[i].desktop_settings.mode = &modes[j];
194 monitors[i].current_settings = monitors[i].desktop_settings;
197 sort(monitors, [](const Msp::Graphics::Monitor &m1, const Msp::Graphics::Monitor &m2){
198 if(m1.desktop_settings.mode && !m2.desktop_settings.mode)
200 if(!m1.desktop_settings.mode && m2.desktop_settings.mode)
202 return m1.desktop_settings.x<m2.desktop_settings.x;
205 for(unsigned i=0; i<modes.size(); ++i)
207 auto j = find_member(monitors, mode_monitor_indices[i], &Monitor::index);
208 modes[i].monitor = &*j;
209 j->video_modes.push_back(&modes[i]);
212 Monitor *prev_enabled = nullptr;
213 for(Monitor &m: monitors)
214 if(m.desktop_settings.mode)
216 m.next_left = prev_enabled;
218 prev_enabled->next_right = &m;
223 primary_monitor = &*find_member(monitors, static_cast<unsigned>(primary_index), &Monitor::index);
225 if(!primary_monitor || !primary_monitor->desktop_settings.mode)
227 // XRandR didn't give a sensible primary monitor. Try to guess one.
228 unsigned largest = 0;
229 for(Monitor &m: monitors)
230 if(const VideoMode *desktop_mode = m.desktop_settings.mode)
232 unsigned size = desktop_mode->width*desktop_mode->height;
236 primary_monitor = &m;
247 XCloseDisplay(priv->display);
252 void Display::set_mode(const VideoMode &requested_mode, bool exclusive)
255 const VideoMode *mode = find_mode(requested_mode);
257 throw unsupported_video_mode(requested_mode);
259 VideoRotation requested_rotation = requested_mode.rotation;
260 if(requested_rotation==ROTATE_ANY)
261 requested_rotation = mode->monitor->desktop_settings.rotation;
263 XRRScreenResources *res = XRRGetScreenResources(priv->display, priv->root_window);
264 RROutput output = priv->monitors[mode->monitor->index];
265 XRROutputInfo *output_info = XRRGetOutputInfo(priv->display, res, output);
267 // Check if the output already has a CRTC and find a free one if it doesn't
268 RRCrtc crtc = output_info->crtc;
269 XRRCrtcInfo *crtc_info = nullptr;
271 crtc_info = XRRGetCrtcInfo(priv->display, res, crtc);
274 for(int i=0; i<res->ncrtc; ++i)
276 crtc_info = XRRGetCrtcInfo(priv->display, res, res->crtcs[i]);
277 if(!crtc_info->noutput)
279 crtc = res->crtcs[i];
282 XRRFreeCrtcInfo(crtc_info);
287 XRRFreeOutputInfo(output_info);
288 throw unsupported_video_mode(requested_mode);
292 /* Due to the semantics of find_mode, the mode's monitor pointer must point
293 to one of the elements of the monitors list, which is non-const here. */
294 Monitor *monitor = const_cast<Monitor *>(mode->monitor);
298 monitor->current_settings.mode = mode;
299 monitor->current_settings.rotation = requested_rotation;
300 monitor->current_settings.x = 0;
301 monitor->current_settings.y = 0;
303 // Disable other outputs for exclusive mode
304 for(Monitor &m: monitors)
305 if(&m!=mode->monitor)
307 XRROutputInfo *o = XRRGetOutputInfo(priv->display, res, priv->monitors[m.index]);
309 XRRSetCrtcConfig(priv->display, res, o->crtc, CurrentTime, 0, 0, 0, RR_Rotate_0, nullptr, 0);
310 XRRFreeOutputInfo(o);
312 m.current_settings.mode = nullptr;
313 m.current_settings.rotation = ROTATE_NORMAL;
314 m.current_settings.x = 0;
315 m.current_settings.y = 0;
320 monitor->current_settings.x = monitor->desktop_settings.x;
321 monitor->current_settings.y = monitor->desktop_settings.y;
324 RRMode mode_id = priv->modes[mode->index];
325 int x = monitor->current_settings.x;
326 int y = monitor->current_settings.y;
327 Rotation sys_rot = rotation_to_sys(requested_rotation);
328 XRRSetCrtcConfig(priv->display, res, crtc, CurrentTime, x, y, mode_id, sys_rot, &output, 1);
330 XRRFreeOutputInfo(output_info);
331 XRRFreeCrtcInfo(crtc_info);
332 XRRFreeScreenResources(res);
334 (void)requested_mode;
336 throw runtime_error("no xrandr support");
340 bool Display::process_events()
342 int pending = XPending(priv->display);
349 XNextEvent(priv->display, &event.xevent);
353 auto j = priv->windows.find(event.xevent.xany.window);
354 if(j!=priv->windows.end())
356 /* Filter keyboard autorepeat. If this packet is a KeyRelease and
357 the next one is a KeyPress with the exact same parameters, they
358 indicate autorepeat and must be dropped. */
359 if(event.xevent.type==KeyRelease && !j->second->get_keyboard_autorepeat() && pending>0)
361 XKeyEvent &kev = event.xevent.xkey;
363 XPeekEvent(priv->display, &ev2);
364 if(ev2.type==KeyPress)
366 XKeyEvent &kev2 = ev2.xkey;
367 if(kev2.window==kev.window && kev2.time==kev.time && kev2.keycode==kev.keycode)
369 XNextEvent(priv->display, &ev2);
376 j->second->event(event);
383 void Display::check_error()
388 throw runtime_error(error_msg);
393 } // namespace Graphics