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;
66 inline unsigned mode_width(const Msp::Graphics::VideoMode &m, Msp::Graphics::VideoRotation r)
68 if(r==Msp::Graphics::ROTATE_RIGHT || r==Msp::Graphics::ROTATE_LEFT)
80 Display::Display(const string &disp_name):
84 priv->display = XOpenDisplay(nullptr);
86 priv->display = XOpenDisplay(disp_name.c_str());
88 throw runtime_error("XOpenDisplay");
90 XSetErrorHandler(x_error_handler);
92 priv->root_window = DefaultRootWindow(priv->display);
94 err_dialog = new ErrorDialog(this);
99 if(XRRQueryExtension(priv->display, &event_base, &error_base))
102 XRRQueryVersion(priv->display, &major, &minor);
103 if(major>1 || (major==1 && minor>=2))
105 XRRScreenResources *res = XRRGetScreenResources(priv->display, priv->root_window);
106 RROutput primary = XRRGetOutputPrimary(priv->display, priv->root_window);
107 Atom edid_prop = XInternAtom(priv->display, RR_PROPERTY_RANDR_EDID, true);
109 map<RRMode, XRRModeInfo *> modes_by_id;
110 for(int i=0; i<res->nmode; ++i)
111 modes_by_id[res->modes[i].id] = &res->modes[i];
113 int primary_index = -1;
114 vector<unsigned> mode_monitor_indices;
115 vector<int> desktop_mode_indices;
116 for(int i=0; i<res->noutput; ++i)
118 XRROutputInfo *output = XRRGetOutputInfo(priv->display, res, res->outputs[i]);
119 XRRCrtcInfo *crtc = (output->crtc ? XRRGetCrtcInfo(priv->display, res, output->crtc) : nullptr);
121 monitors.push_back(Monitor());
122 Monitor &monitor = monitors.back();
123 monitor.index = monitors.size()-1;
124 monitor.name.assign(output->name, output->nameLen);
125 priv->monitors.push_back(res->outputs[i]);
131 unsigned long length;
132 unsigned long overflow;
133 unsigned char *edid = nullptr;
134 XRRGetOutputProperty(priv->display, res->outputs[i], edid_prop, 0, 32, false, false, XA_INTEGER, &prop_type, &prop_format, &length, &overflow, &edid);
135 if(prop_type==XA_INTEGER && prop_format==8)
137 for(unsigned j=0; j<4; ++j)
139 unsigned offset = 54+j*18;
140 if(edid[offset]==0 && edid[offset+1]==0 && edid[offset+3]==0xFC)
143 for(k=0; (k<13 && edid[offset+5+k]!=0x0A); ++k) ;
144 monitor.name.assign(reinterpret_cast<char *>(edid+offset+5), k);
153 monitor.desktop_settings.rotation = rotation_from_sys(crtc->rotation);
154 monitor.desktop_settings.x = crtc->x;
155 monitor.desktop_settings.y = crtc->y;
158 if(res->outputs[i]==primary)
159 primary_index = monitor.index;
161 unsigned first_mode = modes.size();
162 int desktop_mode_index = -1;
163 for(int j=0; j<output->nmode; ++j)
165 auto k = modes_by_id.find(output->modes[j]);
166 if(k==modes_by_id.end())
169 XRRModeInfo *info = k->second;
170 float rate = static_cast<float>(info->dotClock)/(info->hTotal*info->vTotal);
172 if(any_of(modes.begin()+first_mode, modes.end(), [&info, rate](const VideoMode &m){
173 return (m.width==info->width && m.height==info->height && abs(m.rate-rate)<0.01f);
177 VideoMode mode(info->width, info->height);
178 mode.index = modes.size();
181 modes.push_back(mode);
182 priv->modes.push_back(info->id);
183 mode_monitor_indices.push_back(monitor.index);
185 if(crtc && info->id==crtc->mode)
186 desktop_mode_index = mode.index;
188 desktop_mode_indices.push_back(desktop_mode_index);
190 XRRFreeOutputInfo(output);
192 XRRFreeCrtcInfo(crtc);
195 XRRFreeScreenResources(res);
197 for(unsigned i=0; i<monitors.size(); ++i)
199 int j = desktop_mode_indices[i];
201 monitors[i].desktop_settings.mode = &modes[j];
202 monitors[i].current_settings = monitors[i].desktop_settings;
205 sort(monitors, [](const Msp::Graphics::Monitor &m1, const Msp::Graphics::Monitor &m2){
206 if(m1.desktop_settings.mode && !m2.desktop_settings.mode)
208 if(!m1.desktop_settings.mode && m2.desktop_settings.mode)
210 return m1.desktop_settings.x<m2.desktop_settings.x;
213 for(unsigned i=0; i<modes.size(); ++i)
215 auto j = find_member(monitors, mode_monitor_indices[i], &Monitor::index);
216 modes[i].monitor = &*j;
217 j->video_modes.push_back(&modes[i]);
220 Monitor *prev_enabled = nullptr;
221 for(Monitor &m: monitors)
222 if(m.desktop_settings.mode)
224 m.next_left = prev_enabled;
226 prev_enabled->next_right = &m;
231 primary_monitor = &*find_member(monitors, static_cast<unsigned>(primary_index), &Monitor::index);
233 if(!primary_monitor || !primary_monitor->desktop_settings.mode)
235 // XRandR didn't give a sensible primary monitor. Try to guess one.
236 unsigned largest = 0;
237 for(Monitor &m: monitors)
238 if(const VideoMode *desktop_mode = m.desktop_settings.mode)
240 unsigned size = desktop_mode->width*desktop_mode->height;
244 primary_monitor = &m;
255 XCloseDisplay(priv->display);
260 void Display::set_mode(const VideoMode &requested_mode, bool exclusive)
263 const VideoMode *mode = find_mode(requested_mode);
265 throw unsupported_video_mode(requested_mode);
267 VideoRotation requested_rotation = requested_mode.rotation;
268 if(requested_rotation==ROTATE_ANY)
269 requested_rotation = mode->monitor->desktop_settings.rotation;
271 XRRScreenResources *res = XRRGetScreenResources(priv->display, priv->root_window);
272 RROutput output = priv->monitors[mode->monitor->index];
273 XRROutputInfo *output_info = XRRGetOutputInfo(priv->display, res, output);
275 // Check if the output already has a CRTC and find a free one if it doesn't
276 RRCrtc crtc = output_info->crtc;
277 XRRCrtcInfo *crtc_info = nullptr;
279 crtc_info = XRRGetCrtcInfo(priv->display, res, crtc);
282 for(int i=0; i<res->ncrtc; ++i)
284 crtc_info = XRRGetCrtcInfo(priv->display, res, res->crtcs[i]);
285 if(!crtc_info->noutput)
287 crtc = res->crtcs[i];
290 XRRFreeCrtcInfo(crtc_info);
295 XRRFreeOutputInfo(output_info);
296 throw unsupported_video_mode(requested_mode);
300 /* Due to the semantics of find_mode, the mode's monitor pointer must point
301 to one of the elements of the monitors list, which is non-const here. */
302 Monitor *monitor = const_cast<Monitor *>(mode->monitor);
306 monitor->current_settings.mode = mode;
307 monitor->current_settings.rotation = requested_rotation;
308 monitor->current_settings.x = 0;
309 monitor->current_settings.y = 0;
311 // Disable other outputs for exclusive mode
312 for(Monitor &m: monitors)
313 if(&m!=mode->monitor)
315 XRROutputInfo *o = XRRGetOutputInfo(priv->display, res, priv->monitors[m.index]);
317 XRRSetCrtcConfig(priv->display, res, o->crtc, CurrentTime, 0, 0, 0, RR_Rotate_0, nullptr, 0);
318 XRRFreeOutputInfo(o);
320 m.current_settings.mode = nullptr;
321 m.current_settings.rotation = ROTATE_NORMAL;
322 m.current_settings.x = 0;
323 m.current_settings.y = 0;
328 monitor->current_settings.x = monitor->desktop_settings.x;
329 monitor->current_settings.y = monitor->desktop_settings.y;
332 RRMode mode_id = priv->modes[mode->index];
333 int x = monitor->current_settings.x;
334 int y = monitor->current_settings.y;
335 Rotation sys_rot = rotation_to_sys(requested_rotation);
336 XRRSetCrtcConfig(priv->display, res, crtc, CurrentTime, x, y, mode_id, sys_rot, &output, 1);
338 XRRFreeOutputInfo(output_info);
339 XRRFreeCrtcInfo(crtc_info);
340 XRRFreeScreenResources(res);
342 (void)requested_mode;
344 throw runtime_error("no xrandr support");
348 bool Display::process_events()
350 int pending = XPending(priv->display);
357 XNextEvent(priv->display, &event.xevent);
361 auto j = priv->windows.find(event.xevent.xany.window);
362 if(j!=priv->windows.end())
364 /* Filter keyboard autorepeat. If this packet is a KeyRelease and
365 the next one is a KeyPress with the exact same parameters, they
366 indicate autorepeat and must be dropped. */
367 if(event.xevent.type==KeyRelease && !j->second->get_keyboard_autorepeat() && pending>0)
369 XKeyEvent &kev = event.xevent.xkey;
371 XPeekEvent(priv->display, &ev2);
372 if(ev2.type==KeyPress)
374 XKeyEvent &kev2 = ev2.xkey;
375 if(kev2.window==kev.window && kev2.time==kev.time && kev2.keycode==kev.keycode)
377 XNextEvent(priv->display, &ev2);
384 j->second->event(event);
391 void Display::check_error()
396 throw runtime_error(error_msg);
401 } // namespace Graphics