Method update_descriptor_sets

framework/resource_cache.cpp:110–193

}

void ResourceCache::update_descriptor_sets(const std::vector<core::ImageView> &old_views, const std::vector<core::ImageView> &new_views)
{
	// Find descriptor sets referring to the old image view
	std::vector<VkWriteDescriptorSet> set_updates;
	std::set<size_t>                  matches;

	for (size_t i = 0; i < old_views.size(); ++i)
	{
		auto &old_view = old_views[i];
		auto &new_view = new_views[i];

		for (auto &kd_pair : state.descriptor_sets)
		{
			auto &key            = kd_pair.first;
			auto &descriptor_set = kd_pair.second;

			auto &image_infos = descriptor_set.get_image_infos();

			for (auto &ba_pair : image_infos)
			{
				auto &binding = ba_pair.first;
				auto &array   = ba_pair.second;

				for (auto &ai_pair : array)
				{
					auto &array_element = ai_pair.first;
					auto &image_info    = ai_pair.second;

					if (image_info.imageView == old_view.get_handle())
					{
						// Save key to remove old descriptor set
						matches.insert(key);

						// Update image info with new view
						image_info.imageView = new_view.get_handle();

						// Save struct for writing the update later
						{
							VkWriteDescriptorSet write_descriptor_set{VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET};

							if (auto binding_info = descriptor_set.get_layout().get_layout_binding(binding))
							{
								write_descriptor_set.dstBinding      = binding;
								write_descriptor_set.descriptorType  = binding_info->descriptorType;
								write_descriptor_set.pImageInfo      = &image_info;
								write_descriptor_set.dstSet          = descriptor_set.get_handle();
								write_descriptor_set.dstArrayElement = array_element;
								write_descriptor_set.descriptorCount = 1;

								set_updates.push_back(write_descriptor_set);
							}
							else
							{
								LOGE("Shader layout set does not use image binding at #{}", binding);
							}
						}
					}
				}