Add more docs

Author: ChristopherHX

src/SUMMARY.md

@@ -24,4 +24,5 @@ Edition). The launcher supports Linux and OS X.
     - [JNI](./extra/advanced/jni/index.md)
     - [NDK Shims](./extra/advanced/ndk_shims/index.md)
     - [Modding Api](./extra/advanced/modding-api/index.md)
+    - [Game Window Api](./extra/advanced/game-window-api/index.md)
 - [External Links](./external_links/index.md)

src/extra/advanced/game-window-api/index.md

@@ -0,0 +1,55 @@
+# Game Window API Reference
+
+This API provides access to the primary game window and allows registration of various input and lifecycle callbacks.
+
+---
+
+## Core Window Access
+
+| Symbol | Signature | Description |
+|--------|-----------|-------------|
+| `game_window_get_primary_window` | `GameWindowHandle*()` | Returns a pointer to the current primary game window |
+
+| `game_window_is_mouse_locked` | `bool(GameWindowHandle* handle)` | Checks if the mouse is currently locked in the window |
+
+| `game_window_get_input_mode` | `int(GameWindowHandle* handle)` | Retrieves the current input mode from the window callbacks |
+
+---
+
+## Input Callback Registration
+
+These functions allow you to register input event handlers for keyboard and mouse interactions.
+
+| Symbol | Signature | Description |
+|--------|-----------|-------------|
+| `game_window_add_keyboard_callback` | `void(GameWindowHandle* handle, void* user, bool (*callback)(void* user, int keyCode, int action))` | Registers a keyboard input callback |
+| `game_window_add_mouse_button_callback` | `void(GameWindowHandle* handle, void* user, bool (*callback)(void* user, double x, double y, int button, int action))` | Registers a mouse button input callback |
+| `game_window_add_mouse_position_callback` | `void(GameWindowHandle* handle, void* user, bool (*callback)(void* user, double x, double y, bool relative))` | Registers a mouse movement callback |
+| `game_window_add_mouse_scroll_callback` | `void(GameWindowHandle* handle, void* user, bool (*callback)(void* user, double x, double y, double dx, double dy))` | Registers a mouse scroll callback |
+
+---
+
+## Lifecycle & Rendering Callbacks
+
+| Symbol | Signature | Description |
+|--------|-----------|-------------|
+| `game_window_add_window_creation_callback` | `void(void* user, void (*onCreated)(void* user))` | Registers a callback to be invoked when the window is created |
+| `game_window_add_swap_buffers_callback` | `void(void* user, void (*callback)(void* user, EGLDisplay display, EGLSurface surface))` | Registers a callback for when buffers are swapped during rendering |
+
+---
+
+## Library Integration
+
+Use dlopen and dlsym to load the library and access the functions
+
+```cpp
+dlopen("libmcpelauncher_gamewindow.so");
+```
+
+---
+
+## Data Types
+
+### `GameWindowHandle`
+
+An opaque structure representing the game window.

src/extra/advanced/index.md

@@ -3,4 +3,5 @@
 - [Debugging NDK Libraries](./debugging_ndk_libraries/index.md)
 - [JNI](./jni/index.md)
 - [NDK Shims](./ndk_shims/index.md)
-- [Modding Api](./modding-api/)
+- [Modding Api](./modding-api/index.md)
+- [Game Window Api](./game-window-api/index.md)