pool.cpp

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#include <stdexcept>
 
#include "VEngine/Gfx/Descriptors/Pool.hpp"
 
ven::DescriptorPool::DescriptorPool(Device &device, const uint32_t maxSets, const VkDescriptorPoolCreateFlags poolFlags, const std::vector<VkDescriptorPoolSize> &poolSizes) : m_device{device}
{
    VkDescriptorPoolCreateInfo descriptorPoolInfo{};
    descriptorPoolInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
    descriptorPoolInfo.poolSizeCount = static_cast<uint32_t>(poolSizes.size());
    descriptorPoolInfo.pPoolSizes = poolSizes.data();
    descriptorPoolInfo.maxSets = maxSets;
    descriptorPoolInfo.flags = poolFlags;
 
    if (vkCreateDescriptorPool(m_device.device(), &descriptorPoolInfo, nullptr, &m_descriptorPool) !=
        VK_SUCCESS) {
        throw std::runtime_error("failed to create descriptor pool!");
    }
}
 
bool ven::DescriptorPool::allocateDescriptor(const VkDescriptorSetLayout descriptorSetLayout, VkDescriptorSet &descriptor) const
{
    VkDescriptorSetAllocateInfo allocInfo{};
    allocInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
    allocInfo.descriptorPool = m_descriptorPool;
    allocInfo.pSetLayouts = &descriptorSetLayout;
    allocInfo.descriptorSetCount = 1;
 
    // Might want to create a "DescriptorPoolManager" class that handles this case, and builds
    // a new pool whenever an old pool fills up. But this is beyond our current scope
    return vkAllocateDescriptorSets(m_device.device(), &allocInfo, &descriptor) == VK_SUCCESS;
}