Orange/include/Orange/Render/Swapchain.h

#pragma once

#include <Orange/Core/Span.h>
#include <Orange/Core/Result.h>
#include <Orange/Core/Vector.h>

#include <Orange/Render/RenderContext.h>
#include <vulkan/vulkan_core.h>

namespace orange
{
    static constexpr uint32_t MaxFramesInFlight = 4;

    class Swapchain
    {
    public:
        ~Swapchain();

        static Result<Swapchain> Create(RenderContext& context, VkSurfaceKHR surface, bool hdr = false, bool srgbViews = false);

        VkImage         Image()         const { return m_images[m_currentImage]; }
        VkImageView     ImageView()     const { return m_imageViews[m_currentImage]; }
        VkCommandBuffer CommandBuffer() const { return m_commandBuffers[m_currentFrame]; }
        VkFormat        Format()        const { return m_format; }
        VkExtent2D      Extent()        const { return m_extent; }

        uint32_t        CurrentFrame()  const { return m_currentFrame; }

        void Present();
    protected:
        friend class Result<Swapchain>;
        Swapchain(RenderContext& context, VkSurfaceKHR surface, VkFormat format, VkExtent2D extent, VkSwapchainKHR swapchain,
                  Span<VkImage> images, Span<VkImageView> imageViews, Span<VkCommandBuffer> commandBuffers,
                  Span<VkSemaphore> imageAvailableSemaphores, Span<VkSemaphore> renderFinishedSemaphores, Span<VkFence> inFlightFences,
                  uint32_t currentImage)
            : m_ctx                      { context }
            , m_surface                  { surface }
            , m_format                   { format }
            , m_extent                   { extent }
            , m_swapchain                { swapchain }
            , m_images                   { images }
            , m_imageViews               { imageViews }
            , m_commandBuffers           { commandBuffers }
            , m_imageAvailableSemaphores { imageAvailableSemaphores }
            , m_renderFinishedSemaphores { renderFinishedSemaphores }
            , m_inFlightFences           { inFlightFences }
            , m_currentImage             { currentImage }
        {}

    private:
        RenderContext&  m_ctx;
        VkSurfaceKHR    m_surface;
        VkFormat        m_format;
        VkExtent2D      m_extent;
        VkSwapchainKHR  m_swapchain;

        SmallVector<VkImage,         6> m_images;
        SmallVector<VkImageView,     6> m_imageViews;

        SmallVector<VkCommandBuffer, MaxFramesInFlight> m_commandBuffers;
        SmallVector<VkSemaphore,     MaxFramesInFlight> m_imageAvailableSemaphores;
        SmallVector<VkSemaphore,     MaxFramesInFlight> m_renderFinishedSemaphores;
        SmallVector<VkFence,         MaxFramesInFlight> m_inFlightFences;

        uint32_t m_currentFrame = 0;
        uint32_t m_currentImage = 0;
    };
}