Renderpass.hpp

#pragma once
 
#include <volk.h>
 
#include <optional>
#include <vector>
 
namespace PixelBullet
{
    class LogicalDevice;
    class RenderStage;
 
    class Renderpass
    {
    public:
        class SubpassDescription
        {
        public:
            SubpassDescription(VkPipelineBindPoint bindPoint, std::vector<VkAttachmentReference> colorAttachments,
                               const std::optional<uint32_t>& depthAttachment)
                : m_ColorAttachments(std::move(colorAttachments))
            {
                m_SubpassDescription.pipelineBindPoint = bindPoint;
                m_SubpassDescription.colorAttachmentCount = static_cast<uint32_t>(this->m_ColorAttachments.size());
                m_SubpassDescription.pColorAttachments =
                    this->m_ColorAttachments.empty() ? nullptr : this->m_ColorAttachments.data();
 
                if (depthAttachment)
                {
                    m_DepthStencilAttachment.attachment = *depthAttachment;
                    m_DepthStencilAttachment.layout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
                    m_SubpassDescription.pDepthStencilAttachment = &m_DepthStencilAttachment;
                }
            }
 
            SubpassDescription(const SubpassDescription&) = delete;
            SubpassDescription& operator=(const SubpassDescription&) = delete;
 
            SubpassDescription(SubpassDescription&&) noexcept = default;
            SubpassDescription& operator=(SubpassDescription&&) noexcept = default;
 
            const VkSubpassDescription& GetSubpassDescription() const
            {
                return m_SubpassDescription;
            }
 
        private:
            VkSubpassDescription m_SubpassDescription = {};
            std::vector<VkAttachmentReference> m_ColorAttachments;
            VkAttachmentReference m_DepthStencilAttachment = {};
        };
 
        Renderpass(const LogicalDevice& logicalDevice, const RenderStage& renderStage, VkFormat depthFormat,
                   VkFormat surfaceFormat, VkSampleCountFlagBits samples = VK_SAMPLE_COUNT_1_BIT);
        ~Renderpass();
 
        operator const VkRenderPass&() const
        {
            return m_Renderpass;
        }
        const VkRenderPass& GetRenderpass() const
        {
            return m_Renderpass;
        }
 
    private:
        const LogicalDevice& m_LogicalDevice;
        VkRenderPass m_Renderpass = VK_NULL_HANDLE;
    };
} // namespace PixelBullet