Initial vulkan context and immediate drawer.

Extremely rough, just checking in so DrChat can snoop.

src/xenia/ui/vulkan/premake5.lua

@@ -0,0 +1,53 @@
+project_root = "../../../.."
+include(project_root.."/tools/build")
+
+group("src")
+project("xenia-ui-vulkan")
+  uuid("4933d81e-1c2c-4d5d-b104-3c0eb9dc2f00")
+  kind("StaticLib")
+  language("C++")
+  links({
+    "xenia-base",
+    "xenia-ui",
+    "xenia-ui-spirv",
+  })
+  defines({
+  })
+  includedirs({
+    project_root.."/third_party/gflags/src",
+    project_root.."/third_party/vulkan/",
+  })
+  local_platform_files()
+  removefiles({"*_demo.cc"})
+
+group("demos")
+project("xenia-ui-window-vulkan-demo")
+  uuid("97598f13-3177-454c-8e58-c59e2b6ede27")
+  kind("WindowedApp")
+  language("C++")
+  links({
+    "gflags",
+    "imgui",
+    "vulkan-loader",
+    "xenia-base",
+    "xenia-ui",
+    "xenia-ui-spirv",
+    "xenia-ui-vulkan",
+  })
+  flags({
+    "WinMain",  -- Use WinMain instead of main.
+  })
+  defines({
+  })
+  includedirs({
+    project_root.."/third_party/gflags/src",
+    project_root.."/third_party/vulkan/",
+  })
+  files({
+    "../window_demo.cc",
+    "vulkan_window_demo.cc",
+    project_root.."/src/xenia/base/main_"..platform_suffix..".cc",
+  })
+  resincludedirs({
+    project_root,
+  })