Added initial implementation of Vulkan Render Passes.

gpu/vulkan/vulkan_swap_chain.h

Index: gpu/vulkan/vulkan_swap_chain.h
diff --git a/gpu/vulkan/vulkan_swap_chain.h b/gpu/vulkan/vulkan_swap_chain.h
new file mode 100644
index 0000000000000000000000000000000000000000..7c376e069d0e842ba97fea7a86c34e6cc905cf7d
--- /dev/null
+++ b/gpu/vulkan/vulkan_swap_chain.h
@@ -0,0 +1,87 @@
+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef GPU_VULKAN_VULKAN_SWAP_CHAIN_H_
+#define GPU_VULKAN_VULKAN_SWAP_CHAIN_H_
+
+#include <vulkan/vulkan.h>
+#include <vector>
+
+#include "base/memory/scoped_ptr.h"
+#include "gpu/vulkan/vulkan_export.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gfx/swap_result.h"
+
+namespace gpu {
+
+class VulkanCommandBuffer;
+class VulkanCommandPool;
+class VulkanImageView;
+
+class VulkanSwapChain {
+ public:
+  VulkanSwapChain();
+  ~VulkanSwapChain();
+
+  bool Initialize(VkSurfaceKHR surface,
+                  const VkSurfaceCapabilitiesKHR& surface_caps,
+                  const VkSurfaceFormatKHR& surface_format);
+  void Destroy();
+
+  gfx::SwapResult SwapBuffers();
+
+  uint32_t num_images() const { return static_cast<uint32_t>(images_.size()); }
+  uint32_t current_image() const { return current_image_; }
+  const gfx::Size& size() const { return size_; }
+
+  VulkanImageView* GetImageView(uint32_t index) const {
+    DCHECK_LT(index, images_.size());
+    return images_[index]->image_view.get();
+  }
+
+  VulkanImageView* GetCurrentImageView() const {
+    return GetImageView(current_image_);
+  }
+
+  VulkanCommandBuffer* GetCurrentCommandBuffer() const {
+    DCHECK_LT(current_image_, images_.size());
+    return images_[current_image_]->command_buffer.get();
+  }
+
+ private:
+  bool InitializeSwapChain(VkSurfaceKHR surface,
+                           const VkSurfaceCapabilitiesKHR& surface_caps,
+                           const VkSurfaceFormatKHR& surface_format);
+  void DestroySwapChain();
+
+  bool InitializeSwapImages(const VkSurfaceCapabilitiesKHR& surface_caps,
+                            const VkSurfaceFormatKHR& surface_format);
+  void DestroySwapImages();
+
+  VkSwapchainKHR swap_chain_ = VK_NULL_HANDLE;
+
+  scoped_ptr<VulkanCommandPool> command_pool_;
+
+  gfx::Size size_;
+
+  struct ImageData {
+    ImageData();
+    ~ImageData();
+
+    VkImage image = VK_NULL_HANDLE;
+    scoped_ptr<VulkanImageView> image_view;
+    scoped_ptr<VulkanCommandBuffer> command_buffer;
+
+    VkSemaphore render_semaphore = VK_NULL_HANDLE;
+    VkSemaphore present_semaphore = VK_NULL_HANDLE;
+  };
+  std::vector<scoped_ptr<ImageData>> images_;
+  uint32_t current_image_ = 0;
+
+  VkSemaphore next_present_semaphore_ = VK_NULL_HANDLE;
+};
+
+}  // namespace gpu
+
+#endif  // GPU_VULKAN_VULKAN_SWAP_CHAIN_H_