Initial vulkan context and immediate drawer.

Extremely rough, just checking in so DrChat can snoop.

src/xenia/ui/vulkan/vulkan_provider.h

@@ -0,0 +1,50 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2016 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_UI_VULKAN_VULKAN_PROVIDER_H_
+#define XENIA_UI_VULKAN_VULKAN_PROVIDER_H_
+
+#include <memory>
+
+#include "xenia/ui/graphics_provider.h"
+
+namespace xe {
+namespace ui {
+namespace vulkan {
+
+class VulkanDevice;
+class VulkanInstance;
+
+class VulkanProvider : public GraphicsProvider {
+ public:
+  ~VulkanProvider() override;
+
+  static std::unique_ptr<GraphicsProvider> Create(Window* main_window);
+
+  VulkanInstance* instance() const { return instance_.get(); }
+  VulkanDevice* device() const { return device_.get(); }
+
+  std::unique_ptr<GraphicsContext> CreateContext(
+      Window* target_window) override;
+  std::unique_ptr<GraphicsContext> CreateOffscreenContext() override;
+
+ protected:
+  explicit VulkanProvider(Window* main_window);
+
+  bool Initialize();
+
+  std::unique_ptr<VulkanInstance> instance_;
+  std::unique_ptr<VulkanDevice> device_;
+};
+
+}  // namespace vulkan
+}  // namespace ui
+}  // namespace xe
+
+#endif  // XENIA_UI_VULKAN_VULKAN_PROVIDER_H_