FrameArena.h

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#pragma once
 
#include "vkbuilder.hpp"
 
#include <vector>
 
namespace eve::graphics::vulkan {
 
class FrameArena {
public:
    ~FrameArena();
 
    FrameArena(const FrameArena &) = delete;
    FrameArena &operator=(const FrameArena &) = delete;
    FrameArena() = default;
    FrameArena(FrameArena &&o) noexcept { *this = std::move(o); }
    FrameArena &operator=(FrameArena &&o) noexcept;
 
    struct Alloc {
        vk::DeviceSize offset = 0;
        vk::DeviceSize size = 0;
        void *mapped = nullptr;
    };
 
    bool ensure(vkb::Device &device, vk::DeviceSize bytes, vk::BufferUsageFlags usage);
 
    Alloc alloc(vk::DeviceSize bytes, vk::DeviceSize align = 16);
 
    void reset();
 
    vk::Buffer buffer() const;
    vk::DeviceSize capacity() const { return capacity_; }
    vk::DeviceSize used() const { return head_; }
 
private:
    vkb::GenericBuffer buf_;
    vkb::Device device_;
    vk::DeviceSize capacity_ = 0;
    vk::DeviceSize head_ = 0;
    void *mapped_ = nullptr;
};
 
}  // namespace eve::graphics::vulkan