Initial vulkan context and immediate drawer.

Extremely rough, just checking in so DrChat can snoop.

src/xenia/ui/vulkan/vulkan_context.h

@@ -0,0 +1,63 @@
+/**
+ ******************************************************************************
+ * 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_CONTEXT_H_
+#define XENIA_UI_VULKAN_VULKAN_CONTEXT_H_
+
+#include <memory>
+
+#include "xenia/ui/graphics_context.h"
+#include "xenia/ui/vulkan/vulkan.h"
+
+namespace xe {
+namespace ui {
+namespace vulkan {
+
+class VulkanDevice;
+class VulkanImmediateDrawer;
+class VulkanInstance;
+class VulkanProvider;
+class VulkanSwapChain;
+
+class VulkanContext : public GraphicsContext {
+ public:
+  ~VulkanContext() override;
+
+  ImmediateDrawer* immediate_drawer() override;
+  VulkanSwapChain* swap_chain() const { return swap_chain_.get(); }
+  VulkanInstance* instance() const;
+  VulkanDevice* device() const;
+
+  bool is_current() override;
+  bool MakeCurrent() override;
+  void ClearCurrent() override;
+
+  void BeginSwap() override;
+  void EndSwap() override;
+
+  std::unique_ptr<RawImage> Capture() override;
+
+ private:
+  friend class VulkanProvider;
+
+  explicit VulkanContext(VulkanProvider* provider, Window* target_window);
+
+ private:
+  bool Initialize();
+
+  std::unique_ptr<VulkanSwapChain> swap_chain_;
+  std::unique_ptr<VulkanImmediateDrawer> immediate_drawer_;
+  VkCommandPool cmd_pool_ = nullptr;
+};
+
+}  // namespace vulkan
+}  // namespace ui
+}  // namespace xe
+
+#endif  // XENIA_UI_VULKAN_VULKAN_CONTEXT_H_