vk_image.h

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#pragma once
 
#include <gui_core/graphics/gui_image.h>
 
#include <vulkan/vulkan.h>
#include <vk_mem_alloc.h>
 
#include <cstdint>
#include <vector>
 
namespace tachyon::vulkan
{
 
    class VulkanImage : public tachyon::Image
    {
    public:
        VkImage       image;
        VkImageView   imageView;
        VmaAllocation allocation;
        VkExtent3D    imageExtent;
        VkFormat      imageFormat;
        VkSampler     imageSampler;

        struct Recipe
        {
            VkImageUsageFlags     usage     = 0;
            tachyon::Sampler   sampler   = tachyon::Sampler::UNDEFINED;
            bool                  mipmapped = false;
            std::vector<uint8_t>  pixels;
        } recipe;
    };
 
    class VulkanImageSet : public tachyon::ImageSet
    {
    public:
        static constexpr uint32_t kCapacity = 256;
 
        std::vector<VkDescriptorImageInfo> textures;
        std::vector<VulkanImage*>          owners;     

        void RefreshDescriptors();
 
    public:
        void Clear() override;
        tachyon::ImageIndex Add(tachyon::Image* image) override;
        void Remove(tachyon::ImageIndex index) override;
        bool SetImage(tachyon::ImageIndex index, VulkanImage* image);
        bool SetDescriptor(tachyon::ImageIndex index, const VkDescriptorImageInfo& descriptor);
        tachyon::ImageIndex ReserveIndex();
 
    private:
        tachyon::ImageIndex Allocate(const VkDescriptorImageInfo& descriptor);
        bool IsInRange(tachyon::ImageIndex index) const;
 
        std::vector<tachyon::ImageIndex> m_freeIndices;
    };

}