Made queries use XRRGetScreenResourcesCurrent.

Fixes #347.
Closes #351.

README.md

@@ -96,6 +96,8 @@ GLFW bundles a number of dependencies in the `deps/` directory.
  - [Win32] Bugfix: Context re-creation was not triggered by sRGB hint
  - [X11] Added run-time support for systems lacking the XKB extension
  - [X11] Made GLX 1.3 the minimum supported version
+ - [X11] Replaced `XRRGetScreenResources` with `XRRGetScreenResourcesCurrent`
+         for monitor property retrieval
  - [X11] Bugfix: The case of finding no usable CRTCs was not detected
  - [X11] Bugfix: Detection of broken Nvidia RandR gamma support did not verify
                  that at least one CRTC was present
@@ -160,6 +162,7 @@ skills.
  - Gerald Franz
  - GeO4d
  - Marcus Geelnard
+ - Eloi Marín Gratacós
  - Stefan Gustavson
  - Sylvain Hellegouarch
  - Matthew Henry

src/x11_monitor.c

@@ -311,7 +311,7 @@ void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos)
         XRRScreenResources* sr;
         XRRCrtcInfo* ci;
 
-        sr = XRRGetScreenResources(_glfw.x11.display, _glfw.x11.root);
+        sr = XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
         ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
 
         if (xpos)
@@ -339,7 +339,7 @@ GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* found)
         XRRCrtcInfo* ci;
         XRROutputInfo* oi;
 
-        sr = XRRGetScreenResources(_glfw.x11.display, _glfw.x11.root);
+        sr = XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
         ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
         oi = XRRGetOutputInfo(_glfw.x11.display, sr, monitor->x11.output);
 
@@ -394,7 +394,7 @@ void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode)
         XRRScreenResources* sr;
         XRRCrtcInfo* ci;
 
-        sr = XRRGetScreenResources(_glfw.x11.display, _glfw.x11.root);
+        sr = XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
         ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
 
         *mode = vidmodeFromModeInfo(getModeInfo(sr, ci->mode), ci);