Wayland: Load a bigger cursor theme for HiDPI

src/wl_init.c

@@ -1067,6 +1067,8 @@ int _glfwPlatformInit(void)
                             "Wayland: Unable to load default cursor theme");
             return GLFW_FALSE;
         }
+        // If this happens to be NULL, we just fallback to the scale=1 version.
+        _glfw.wl.cursorThemeHiDPI = wl_cursor_theme_load(NULL, 64, _glfw.wl.shm);
         _glfw.wl.cursorSurface =
             wl_compositor_create_surface(_glfw.wl.compositor);
         _glfw.wl.cursorTimerfd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC);
@@ -1105,6 +1107,8 @@ void _glfwPlatformTerminate(void)
 
     if (_glfw.wl.cursorTheme)
         wl_cursor_theme_destroy(_glfw.wl.cursorTheme);
+    if (_glfw.wl.cursorThemeHiDPI)
+        wl_cursor_theme_destroy(_glfw.wl.cursorThemeHiDPI);
     if (_glfw.wl.cursor.handle)
     {
         _glfw_dlclose(_glfw.wl.cursor.handle);

src/wl_platform.h

@@ -240,6 +240,7 @@ typedef struct _GLFWlibraryWayland
     int                         seatVersion;
 
     struct wl_cursor_theme*     cursorTheme;
+    struct wl_cursor_theme*     cursorThemeHiDPI;
     struct wl_surface*          cursorSurface;
     int                         cursorTimerfd;
     uint32_t                    pointerSerial;