4 files changed, 30 insertions, 0 deletions
diff --git a/src/platform/CMakeLists.txt b/src/platform/CMakeLists.txt
index 3044df08..63ef9058 100644
--- a/src/platform/CMakeLists.txt
+++ b/src/platform/CMakeLists.txt
@@ -26,6 +26,7 @@ elseif (EMSCRIPTEN)
 	add_subdirectory(graphics/web_canvas)
 elseif (UNIX)
 	add_subdirectory(graphics/cairo)
+	add_subdirectory(gui/xcb)
 endif()
 
 add_subdirectory(bootstrap)
diff --git a/src/platform/gui/xcb/CMakeLists.txt b/src/platform/gui/xcb/CMakeLists.txt
new file mode 100644
index 00000000..2ef675a3
--- /dev/null
+++ b/src/platform/gui/xcb/CMakeLists.txt
@@ -0,0 +1,8 @@
+find_library(LIBRARY_CAIRO cairo REQUIRED)
+find_library(LIBRARY_XCB xcb REQUIRED)
+add_library(CruPlatformGuiX11
+	UiApplication.cpp
+	Window.cpp
+)
+target_link_libraries(CruPlatformGuiX11 PUBLIC CruPlatformGui ${LIBRARY_XCB} ${LIBRARY_CAIRO})
+
diff --git a/src/platform/gui/xcb/UiApplication.cpp b/src/platform/gui/xcb/UiApplication.cpp
new file mode 100644
index 00000000..baa36abe
--- /dev/null
+++ b/src/platform/gui/xcb/UiApplication.cpp
@@ -0,0 +1,20 @@
+#include <cru/platform/gui/xcb/UiApplication.h>
+#include <xcb/xcb.h>
+
+namespace cru::platform::gui::xcb {
+XcbUiApplication::XcbUiApplication() {
+  int screen_num;
+  xcb_connection_t *connection = xcb_connect(NULL, &screen_num);
+  this->CheckXcbConnectionError();
+  const xcb_setup_t *setup = xcb_get_setup(connection);
+  xcb_screen_iterator_t iter = xcb_setup_roots_iterator(setup);
+  xcb_screen_t *screen = iter.data;
+}
+
+XcbUiApplication::~XcbUiApplication() { xcb_disconnect(this->xcb_); }
+
+void XcbUiApplication::CheckXcbConnectionError() { 
+if (xcb_connection_has_error(this->xcb_)) {
+  throw XcbException();
+}}
+}  // namespace cru::platform::gui::xcb
diff --git a/src/platform/gui/xcb/Window.cpp b/src/platform/gui/xcb/Window.cpp
new file mode 100644
index 00000000..92772acf
--- /dev/null
+++ b/src/platform/gui/xcb/Window.cpp
@@ -0,0 +1 @@
+#include <cru/platform/gui/xcb/Window.h>