vktutorial/hk_swap_chain.hpp

#pragma once

#include "hk_device.hpp"

// vulkan headers
#include <vulkan/vulkan.h>

// std lib headers
#include <memory>
#include <string>
#include <vector>

namespace hk
{

  class SwapChain
  {
  public:
    static constexpr int MAX_FRAMES_IN_FLIGHT = 2;

    SwapChain(Device &deviceRef, VkExtent2D windowExtent);
    SwapChain(Device &deviceRef, VkExtent2D windowExtent, std::shared_ptr<SwapChain> previous);
    ~SwapChain();

    SwapChain(const SwapChain &) = delete;
    SwapChain &operator=(const SwapChain &) = delete;

    VkFramebuffer getFrameBuffer(int index) { return m_swapChainFramebuffers[index]; }
    VkRenderPass getRenderPass() { return m_renderPass; }
    VkImageView getImageView(int index) { return m_swapChainImageViews[index]; }
    size_t imageCount() { return m_swapChainImages.size(); }
    VkFormat getSwapChainImageFormat() { return m_swapChainImageFormat; }
    VkExtent2D getSwapChainExtent() { return m_swapChainExtent; }
    uint32_t width() { return m_swapChainExtent.width; }
    uint32_t height() { return m_swapChainExtent.height; }

    float extentAspectRatio()
    {
      return static_cast<float>(m_swapChainExtent.width) / static_cast<float>(m_swapChainExtent.height);
    }
    VkFormat findDepthFormat();

    VkResult acquireNextImage(uint32_t *imageIndex);
    VkResult submitCommandBuffers(const VkCommandBuffer *buffers, uint32_t *imageIndex);

    bool compareSwapFormats(const SwapChain &swapCahin) const
    {
      return swapCahin.m_swapChainDepthFormat == m_swapChainDepthFormat &&
             swapCahin.m_swapChainImageFormat == m_swapChainImageFormat;
    }

  private:
    void init();
    void createSwapChain();
    void createImageViews();
    void createDepthResources();
    void createRenderPass();
    void createFramebuffers();
    void createSyncObjects();

    // Helper functions
    VkSurfaceFormatKHR chooseSwapSurfaceFormat(
        const std::vector<VkSurfaceFormatKHR> &availableFormats);
    VkPresentModeKHR chooseSwapPresentMode(
        const std::vector<VkPresentModeKHR> &availablePresentModes);
    VkExtent2D chooseSwapExtent(const VkSurfaceCapabilitiesKHR &capabilities);

    VkFormat m_swapChainImageFormat;
    VkFormat m_swapChainDepthFormat;
    VkExtent2D m_swapChainExtent;

    std::vector<VkFramebuffer> m_swapChainFramebuffers;
    VkRenderPass m_renderPass;

    std::vector<VkImage> m_depthImages;
    std::vector<VkDeviceMemory> m_depthImageMemorys;
    std::vector<VkImageView> m_depthImageViews;
    std::vector<VkImage> m_swapChainImages;
    std::vector<VkImageView> m_swapChainImageViews;

    Device &m_device;
    VkExtent2D m_windowExtent;

    VkSwapchainKHR m_swapChain;
    std::shared_ptr<SwapChain> m_oldSwapChain;

    std::vector<VkSemaphore> m_imageAvailableSemaphores;
    std::vector<VkSemaphore> m_renderFinishedSemaphores;
    std::vector<VkFence> m_inFlightFences;
    std::vector<VkFence> m_imagesInFlight;
    size_t m_currentFrame = 0;
  };

} // namespace hk