Track initial color scheme preference read on Linux

glfw/cocoa_window.m

@@ -955,7 +955,7 @@ static const NSRange kEmptyRange = { NSNotFound, 0 };
     GLFWColorScheme new_appearance = glfwGetCurrentSystemColorTheme();
     if (new_appearance != appearance) {
         appearance = new_appearance;
-        _glfwInputColorScheme(appearance);
+        _glfwInputColorScheme(appearance, false);
     }
 }
 

glfw/glfw3.h

@@ -1429,16 +1429,17 @@ typedef void (* GLFWapplicationclosefun)(int);
  *
  *  This is the function pointer type for system color theme changes.
  *  @code
- *  void function_name(int theme_type)
+ *  void function_name(GLFWColorScheme theme_type, bool is_initial_value)
  *  @endcode
  *
  *  @param[in] theme_type 0 for unknown, 1 for dark and 2 for light
+ *  @param[in] is_initial_value true if this is the initial read of the color theme on systems where it is asynchronous such as Linux
  *
  *  @sa @ref glfwSetSystemColorThemeChangeCallback
  *
  *  @ingroup window
  */
-typedef void (* GLFWsystemcolorthemechangefun)(GLFWColorScheme);
+typedef void (* GLFWsystemcolorthemechangefun)(GLFWColorScheme, bool);
 
 
 /*! @brief The function pointer type for window content refresh callbacks.

glfw/input.c

@@ -448,9 +448,9 @@ void _glfwInputJoystickHat(_GLFWjoystick* js, int hat, char value)
     js->hats[hat] = value;
 }
 
-void _glfwInputColorScheme(GLFWColorScheme value) {
+void _glfwInputColorScheme(GLFWColorScheme value, bool is_initial_value) {
     _glfwPlatformInputColorScheme(value);
-    if (_glfw.callbacks.system_color_theme_change) _glfw.callbacks.system_color_theme_change(value);
+    if (_glfw.callbacks.system_color_theme_change) _glfw.callbacks.system_color_theme_change(value, is_initial_value);
 }
 
 //////////////////////////////////////////////////////////////////////////

glfw/internal.h

@@ -814,7 +814,7 @@ void _glfwInputMouseClick(_GLFWwindow* window, int button, int action, int mods)
 void _glfwInputCursorPos(_GLFWwindow* window, double xpos, double ypos);
 void _glfwInputCursorEnter(_GLFWwindow* window, bool entered);
 int _glfwInputDrop(_GLFWwindow* window, const char *mime, const char *text, size_t sz);
-void _glfwInputColorScheme(GLFWColorScheme);
+void _glfwInputColorScheme(GLFWColorScheme, bool);
 void _glfwPlatformInputColorScheme(GLFWColorScheme);
 void _glfwInputJoystick(_GLFWjoystick* js, int event);
 void _glfwInputJoystickAxis(_GLFWjoystick* js, int axis, float value);

glfw/linux_desktop_settings.c

@@ -43,6 +43,7 @@ process_fdo_setting(const char *key, DBusMessageIter *value) {
             dbus_message_iter_get_basic(value, &val);
             if (val > 2) val = 0;
             appearance = val;
+            _glfwInputColorScheme(appearance, true);
         }
     }
 }
@@ -161,7 +162,7 @@ on_color_scheme_change(DBusMessage *message) {
                 if (val > 2) val = 0;
                 if (val != appearance) {
                     appearance = val;
-                    _glfwInputColorScheme(appearance);
+                    _glfwInputColorScheme(appearance, false);
                 }
             }
             break;