Added support for _NET_WM_ICON_NAME.

src/x11_platform.h

@@ -142,6 +142,7 @@ typedef struct _GLFWwindowX11
     Window        handle;            // Window handle
     Atom          wmDeleteWindow;    // WM_DELETE_WINDOW atom
     Atom          wmName;            // _NET_WM_NAME atom
+    Atom          wmIconName;        // _NET_WM_ICON_NAME atom
     Atom          wmPing;            // _NET_WM_PING atom
     Atom          wmState;           // _NET_WM_STATE atom
     Atom          wmStateFullscreen; // _NET_WM_STATE_FULLSCREEN atom

src/x11_window.c

@@ -198,6 +198,9 @@ static GLboolean hasEWMH(_GLFWwindow* window)
     window->X11.wmName =
         getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_NAME");
 
+    window->X11.wmIconName =
+        getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_ICON_NAME");
+
     window->X11.wmPing =
         getSupportedAtom(supportedAtoms, atomCount, "_NET_WM_PING");
 
@@ -1512,6 +1515,8 @@ void _glfwPlatformCloseWindow(_GLFWwindow* window)
 
 void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
 {
+    Atom type = XInternAtom(_glfwLibrary.X11.display, "UTF8_STRING", False);
+
 #if defined(X_HAVE_UTF8_STRING)
     Xutf8SetWMProperties(_glfwLibrary.X11.display,
                          window->X11.handle,
@@ -1530,12 +1535,19 @@ void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
 
     if (window->X11.wmName != None)
     {
-        Atom type = XInternAtom(_glfwLibrary.X11.display, "UTF8_STRING", False);
         XChangeProperty(_glfwLibrary.X11.display,  window->X11.handle,
                         window->X11.wmName, type, 8,
                         PropModeReplace,
                         (unsigned char*) title, strlen(title));
     }
+
+    if (window->X11.wmIconName != None)
+    {
+        XChangeProperty(_glfwLibrary.X11.display,  window->X11.handle,
+                        window->X11.wmIconName, type, 8,
+                        PropModeReplace,
+                        (unsigned char*) title, strlen(title));
+    }
 }