lib/ui/gfx/swapchain/vulkan_display_swapchain.h

// Copyright 2017 The Fuchsia 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 GARNET_LIB_UI_GFX_SWAPCHAIN_VULKAN_DISPLAY_SWAPCHAIN_H_
#define GARNET_LIB_UI_GFX_SWAPCHAIN_VULKAN_DISPLAY_SWAPCHAIN_H_

#include "garnet/lib/ui/gfx/swapchain/swapchain.h"

#include "lib/escher/resources/resource_manager.h"
#include "lib/escher/resources/resource_recycler.h"
#include "lib/escher/vk/vulkan_device_queues.h"
#include "lib/escher/vk/vulkan_swapchain.h"

namespace scenic_impl {
namespace gfx {

class Display;
class EventTimestamper;

// VulkanDisplaySwapchain implements the Swapchain interface by using a Vulkan
// swapchain to present images to a physical display. This is provided as an
// alternative implementation to DisplaySwapchain and is just for debugging
// purposes.
class VulkanDisplaySwapchain : public Swapchain {
 public:
  VulkanDisplaySwapchain(Display* display, EventTimestamper* timestamper,
                         escher::Escher* escher);
  ~VulkanDisplaySwapchain() override;

  void InitializeVulkanSwapchain(Display* display,
                                 escher::VulkanDeviceQueues* device_queues,
                                 escher::ResourceRecycler* recycler);

  // |Swapchain|
  bool DrawAndPresentFrame(const FrameTimingsPtr& frame_timings,
                           const HardwareLayerAssignment& hla,
                           DrawCallback draw_callback) override;

 private:
  Display* const display_;
  EventTimestamper* const event_timestamper_;
  escher::VulkanSwapchain swapchain_;
  uint32_t swapchain_image_count_ = 0;
  vk::Device device_;
  vk::Queue queue_;

  size_t next_semaphore_index_ = 0;

  std::vector<escher::SemaphorePtr> image_available_semaphores_;
  std::vector<escher::SemaphorePtr> render_finished_semaphores_;

  FXL_DISALLOW_COPY_AND_ASSIGN(VulkanDisplaySwapchain);
};

}  // namespace gfx
}  // namespace scenic_impl

#endif  // GARNET_LIB_UI_GFX_SWAPCHAIN_VULKAN_DISPLAY_SWAPCHAIN_H_