allocate_set()

vk::DescriptorSet MayaFlux::Core::VKDescriptorManager::allocate_set	(	vk::Device	device,
		vk::DescriptorSetLayout	layout
	)

Allocate a descriptor set from the pool.

Parameters

device	Logical device
layout	Descriptor set layout

Returns

Allocated descriptor set, or null on failure

Allocates from current pool. If pool is exhausted, creates a new pool automatically and retries allocation.

Sets are freed when their pool is destroyed (on cleanup()).

Definition at line 256 of file VKDescriptorManager.cpp.

{
    if (!layout) {
        MF_ERROR(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Cannot allocate descriptor set with null layout");
        return nullptr;
    }
 
    if (m_pools.empty()) {
        MF_ERROR(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "No descriptor pools available - call initialize() first");
        return nullptr;
    }
 
    vk::DescriptorSetAllocateInfo alloc_info;
    alloc_info.descriptorPool = m_pools[m_current_pool_index];
    alloc_info.descriptorSetCount = 1;
    alloc_info.pSetLayouts = &layout;
 
    vk::DescriptorSet set;
    try {
        auto sets = device.allocateDescriptorSets(alloc_info);
        set = sets[0];
        m_allocated_count++;
    } catch (const vk::OutOfPoolMemoryError&) {
        MF_DEBUG(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Descriptor pool {} exhausted, growing...", m_current_pool_index);
 
        if (!grow_pools(device)) {
            return nullptr;
        }
 
        alloc_info.descriptorPool = m_pools[m_current_pool_index];
        try {
            auto sets = device.allocateDescriptorSets(alloc_info);
            set = sets[0];
            m_allocated_count++;
        } catch (const vk::SystemError& e) {
            MF_ERROR(Journal::Component::Core, Journal::Context::GraphicsBackend,
                "Failed to allocate descriptor set after pool growth: {}", e.what());
            return nullptr;
        }
    } catch (const vk::SystemError& e) {
        MF_ERROR(Journal::Component::Core, Journal::Context::GraphicsBackend,
            "Failed to allocate descriptor set: {}", e.what());
        return nullptr;
    }
 
    MF_DEBUG(Journal::Component::Core, Journal::Context::GraphicsBackend,
        "Allocated descriptor set (total: {}/{})", m_allocated_count, m_pool_capacity);
 
    return set;
}

References MayaFlux::Journal::Core, MayaFlux::Journal::GraphicsBackend, grow_pools(), m_allocated_count, m_current_pool_index, m_pool_capacity, m_pools, MF_DEBUG, and MF_ERROR.

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