create_layout()

vk::DescriptorSetLayout MayaFlux::Core::VKDescriptorManager::create_layout	(	vk::Device	device,
		const DescriptorSetLayoutConfig &	config
	)

Create descriptor set layout from configuration.

Parameters

device	Logical device
config	Layout configuration (bindings)

Returns

Descriptor set layout handle, or null on failure

Layouts are cached - subsequent calls with identical configs return the same layout without recreation.

Example: DescriptorSetLayoutConfig config; config.add_storage_buffer(0); // layout(binding=0) buffer config.add_storage_buffer(1); // layout(binding=1) buffer auto layout = manager.create_layout(device, config);

Definition at line 123 of file VKDescriptorManager.cpp.

{
    if (config.bindings.empty()) {
        MF_WARN(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Creating descriptor set layout with no bindings");
    }
 
    size_t config_hash = hash_layout_config(config);
    auto it = m_layout_cache.find(config_hash);
    if (it != m_layout_cache.end()) {
        MF_DEBUG(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Reusing cached descriptor set layout (hash: 0x{:X})", config_hash);
        return m_layouts[it->second];
    }
 
    std::vector<vk::DescriptorSetLayoutBinding> vk_bindings;
    vk_bindings.reserve(config.bindings.size());
 
    for (const auto& binding : config.bindings) {
        vk::DescriptorSetLayoutBinding vk_binding;
        vk_binding.binding = binding.binding;
        vk_binding.descriptorType = binding.type;
        vk_binding.descriptorCount = binding.count;
        vk_binding.stageFlags = binding.stage_flags;
        vk_binding.pImmutableSamplers = nullptr;
 
        vk_bindings.push_back(vk_binding);
    }
 
    vk::DescriptorSetLayoutCreateInfo layout_info;
    layout_info.bindingCount = static_cast<uint32_t>(vk_bindings.size());
    layout_info.pBindings = vk_bindings.data();
 
    vk::DescriptorSetLayout layout;
    try {
        layout = device.createDescriptorSetLayout(layout_info);
    } catch (const vk::SystemError& e) {
        MF_ERROR(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Failed to create descriptor set layout: {}", e.what());
        return nullptr;
    }
 
    size_t layout_index = m_layouts.size();
    m_layouts.push_back(layout);
    m_layout_cache[config_hash] = layout_index;
 
    MF_INFO(Journal::Component::Core, Journal::Context::GraphicsBackend,
        "Created descriptor set layout ({} bindings, hash: 0x{:X})",
        config.bindings.size(), config_hash);
 
    return layout;
}

References MayaFlux::Core::DescriptorSetLayoutConfig::bindings, MayaFlux::Journal::Core, MayaFlux::Journal::GraphicsBackend, hash_layout_config(), m_layout_cache, m_layouts, MF_DEBUG, MF_ERROR, MF_INFO, and MF_WARN.

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