Squash project setup refactor

cmake/functions/SetupVulkan.cmake

@@ -0,0 +1,30 @@
+function(SetupVulkan TARGET)
+    if (APPLE)
+        find_package(MoltenVK REQUIRED)
+        target_link_libraries(${TARGET} PRIVATE ${MoltenVK_LIBRARIES})
+    else ()
+        find_package(Vulkan REQUIRED)
+        target_link_libraries(${TARGET} PRIVATE Vulkan::Vulkan)
+        if (NO_SHADERC)
+            message("Disable shaderc linking")
+        else()
+            find_package(Vulkan OPTIONAL_COMPONENTS shaderc_combined)
+            if (Vulkan_shaderc_combined_FOUND)
+                target_link_libraries(${TARGET} PRIVATE Vulkan::shaderc_combined)
+                target_compile_definitions(${TARGET} PRIVATE HAS_SHADERC)
+            endif ()
+        endif ()
+    endif ()
+    target_include_directories(${TARGET} PUBLIC ${Vulkan_INCLUDE_DIR})
+
+    if (ANDROID)
+        add_definitions(-DVK_USE_PLATFORM_ANDROID_KHR)
+    elseif (WIN32)
+        add_definitions(-DVK_USE_PLATFORM_WIN32_KHR)
+    elseif (LINUX)
+        add_definitions(-DVK_USE_PLATFORM_XCB_KHR)
+        find_package(XCB REQUIRED)
+        target_link_libraries(${TARGET} PRIVATE ${XCB_LIBRARIES})
+    endif()
+endfunction()
+