Replace Xlib with xcb

README.md

@@ -67,6 +67,7 @@ the following dependencies:
 - gcc (tested using GCC 9.2)
 - A Wine installation with `wiengcc` and the development headers.
 - Boost
+- xcb
 
 The following dependencies are included as a Meson wrap:
 

meson.build

@@ -32,7 +32,7 @@ bitsery_dep = subproject('bitsery').get_variable('bitsery_dep')
 threads_dep = dependency('threads')
 # The built in threads dependency does not know how to handle winegcc
 wine_threads_dep = declare_dependency(link_args : '-lpthread')
-x11_dep = dependency('x11')
+xcb_dep = dependency('xcb')
 
 include_dir = include_directories('src/include')
 
@@ -62,7 +62,7 @@ executable(
   ],
   native : false,
   include_directories : include_dir,
-  dependencies : [boost_dep, bitsery_dep, wine_threads_dep, x11_dep],
+  dependencies : [boost_dep, bitsery_dep, wine_threads_dep, xcb_dep],
   cpp_args : compiler_options,
   link_args : []
 )

src/wine-host/editor.cpp

@@ -3,7 +3,8 @@
 ATOM register_window_class(std::string window_class_name);
 
 Win32Editor::Win32Editor(std::string window_class_name)
-    : window_class(register_window_class(window_class_name)) {}
+    : window_class(register_window_class(window_class_name)),
+      x11_connection(xcb_connect(nullptr, nullptr), &xcb_disconnect) {}
 
 HWND Win32Editor::open() {
     window_handle =
@@ -20,14 +21,17 @@ HWND Win32Editor::open() {
 void Win32Editor::close() {
     // RAII does the rest for us
     window_handle = std::nullopt;
+
+    // TODO: Do we need to do something on the X11 side or does the host do
+    //       everything for us?
 }
 
-std::optional<intptr_t> Win32Editor::get_x11_handle() {
+std::optional<xcb_window_t> Win32Editor::get_x11_handle() {
     if (!window_handle.has_value()) {
         return std::nullopt;
     }
 
-    return reinterpret_cast<intptr_t>(
+    return reinterpret_cast<size_t>(
         GetProp(window_handle.value().get(), "__wine_x11_whole_window"));
 }
 

src/wine-host/editor.h

@@ -1,3 +1,5 @@
+#include <xcb/xcb.h>
+
 #define NOMINMAX
 #define NOSERVICE
 #define NOMCX
@@ -32,7 +34,7 @@ class Win32Editor {
     /**
      * Return the X11 window handle for the window if it's currently open.
      */
-    std::optional<intptr_t> get_x11_handle();
+    std::optional<xcb_window_t> get_x11_handle();
 
    private:
     ATOM window_class;
@@ -44,4 +46,6 @@ class Win32Editor {
     std::optional<
         std::unique_ptr<std::remove_pointer_t<HWND>, decltype(&DestroyWindow)>>
         window_handle;
+
+    std::unique_ptr<xcb_connection_t, decltype(&xcb_disconnect)> x11_connection;
 };