//
// Created by atdunbg on 2026/9/20.
//

#include <Engine/Vulkan/UniformBuffer.h>
#include <Engine/Vulkan/Device.h>
#include <Engine/Vulkan/MemoryAllocator.h>
#include <Engine/Core/Log.h>

namespace Engine {

    UniformBuffer::UniformBuffer(Device& device, MemoryAllocator& allocator,
                                 u64 size, u32 frameCount)
        : m_Size(size)
    {
        m_Buffers.reserve(frameCount);
        for (u32 i = 0; i < frameCount; ++i) {
            // Uniform Buffer 需要 CPU 每帧更新，所以用 HOST_VISIBLE | HOST_COHERENT
            m_Buffers.push_back(CreateScope<Buffer>(
                device, allocator, size,
                vk::BufferUsageFlagBits::eUniformBuffer,
                vk::MemoryPropertyFlagBits::eHostVisible |
                vk::MemoryPropertyFlagBits::eHostCoherent));
        }

        ENGINE_INFO("UniformBuffer created: {} bytes x {} frames", size, frameCount);
    }

    void UniformBuffer::Update(u32 frameSlot, const void* data, u64 size)
    {
        m_Buffers[frameSlot]->Upload(data, size);
    }

} // namespace Engine