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x11: fix XRandr GetMonitors

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This commit is contained in:
Andreas Haas 2016-06-12 15:29:02 +02:00
parent ef2f6a18d2
commit eaa34f2123
2 changed files with 28 additions and 8 deletions
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31
platform/x11/os_x11.cpp
View file

@ -120,15 +120,33 @@ void OS_X11::initialize(const VideoMode& p_desired,int p_video_driver,int p_audi
const char* err;
xrr_get_monitors = NULL;
xrr_free_monitors = NULL;
int xrandr_major = 0;
int xrandr_minor = 0;
int event_base, error_base;
xrandr_ext_ok = XRRQueryExtension(x11_display,&event_base, &error_base);
xrandr_handle = dlopen("libXrandr.so", RTLD_LAZY);
err = dlerror();
if (!xrandr_handle) {
fprintf(stderr, "could not load libXrandr.so, dpi detection disabled. Error: %s\n", err);
fprintf(stderr, "could not load libXrandr.so, Error: %s\n", err);
}
else {
XRRQueryVersion(x11_display, &xrandr_major, &xrandr_minor);
if (((xrandr_major << 8) | xrandr_minor) >= 0x0105) {
xrr_get_monitors = (xrr_get_monitors_t) dlsym(xrandr_handle, "XRRGetMonitors");
if (!xrr_get_monitors)
fprintf(stderr, "could not find symbol XRRGetMonitors, dpi detection will only work on the first screen\nError: %s\n", err);
if (!xrr_get_monitors) {
err = dlerror();
fprintf(stderr, "could not find symbol XRRGetMonitors\nError: %s\n", err);
}
else {
xrr_free_monitors = (xrr_free_monitors_t) dlsym(xrandr_handle, "XRRFreeMonitors");
if (!xrr_free_monitors) {
err = dlerror();
fprintf(stderr, "could not find XRRFreeMonitors\nError: %s\n", err);
xrr_get_monitors = NULL;
}
}
}
}
xim = XOpenIM (x11_display, NULL, NULL, NULL);
@ -745,19 +763,18 @@ int OS_X11::get_screen_dpi(int p_screen) const {
ERR_FAIL_INDEX_V(p_screen, get_screen_count(), 0);
//Get physical monitor Dimensions through XRandR and calculate dpi
int event_base, error_base;
const Bool ext_okay = XRRQueryExtension(x11_display,&event_base, &error_base);
Size2 sc = get_screen_size(p_screen);
if (ext_okay) {
if (xrandr_ext_ok) {
int count = 0;
if (xrr_get_monitors) {
xrr_monitor_info *monitors = xrr_get_monitors(x11_display, x11_window, true, &count);
if (p_screen < count) {
double xdpi = sc.width / (double) monitors[p_screen].mwidth * 25.4;
double ydpi = sc.height / (double) monitors[p_screen].mheight * 25.4;
xrr_free_monitors(monitors);
return (xdpi + ydpi) / 2;
}
xrr_free_monitors(monitors);
}
else if (p_screen == 0) {
XRRScreenSize *sizes = XRRSizes(x11_display, 0, &count);

3
platform/x11/os_x11.h
View file

@ -178,8 +178,11 @@ class OS_X11 : public OS_Unix {
void set_wm_fullscreen(bool p_enabled);
typedef xrr_monitor_info* (*xrr_get_monitors_t)(Display *dpy, Window window, Bool get_active, int *nmonitors);
typedef void (*xrr_free_monitors_t)(xrr_monitor_info* monitors);
xrr_get_monitors_t xrr_get_monitors;
xrr_free_monitors_t xrr_free_monitors;
void *xrandr_handle;
Bool xrandr_ext_ok;
protected: