Fix OSX build (#952)

libsrc/grabber/xcb/CMakeLists.txt

@@ -4,7 +4,10 @@ SET(CURRENT_SOURCE_DIR ${CMAKE_SOURCE_DIR}/libsrc/grabber/xcb)
 
 find_package(XCB COMPONENTS SHM IMAGE RENDER RANDR REQUIRED)
 find_package(Qt5Widgets REQUIRED)
-find_package(Qt5X11Extras REQUIRED)
+
+if (NOT APPLE)
+	find_package(Qt5X11Extras REQUIRED)
+endif()
 
 include_directories(${XCB_INCLUDE_DIRS})
 
@@ -19,3 +22,6 @@ target_link_libraries(xcb-grabber
 	${XCB_LIBRARIES}
 )
 
+if (NOT APPLE)
+	target_link_libraries(xcb-grabber Qt5::X11Extras)
+endif()

libsrc/grabber/xcb/XcbGrabber.cpp

@@ -7,7 +7,10 @@
 #include <xcb/xcb_event.h>
 
 #include <QCoreApplication>
+
+#ifndef __APPLE__
 #include <QX11Info>
+#endif
 
 #include <memory>
 
@@ -427,7 +430,11 @@ xcb_render_pictformat_t XcbGrabber::findFormatForVisual(xcb_visualid_t visual) c
 	if (formats == nullptr)
 		return {};
 
+#ifdef __APPLE__
+	int screen = 0;
+#else
 	int screen = QX11Info::appScreen();
+#endif
 	xcb_render_pictscreen_iterator_t sit =
 		xcb_render_query_pict_formats_screens_iterator(formats.get());