81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
/*
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Copyright 2022 flyinghead
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This file is part of Flycast.
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Flycast is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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Flycast is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Flycast. If not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "vulkan_context.h"
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class DynamicDescSetAlloc
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{
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public:
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DynamicDescSetAlloc() {
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descSetsInFlight.resize(1);
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}
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void setLayout(vk::DescriptorSetLayout layout) {
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this->layout = layout;
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}
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void setAllocChunk(int size) {
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this->allocChunk = size;
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}
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void nextFrame()
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{
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unsigned swapChainSize = VulkanContext::Instance()->GetSwapChainSize();
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if (swapChainSize > descSetsInFlight.size())
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descSetsInFlight.resize(swapChainSize);
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else
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while (swapChainSize < descSetsInFlight.size())
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{
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for (auto& descset : descSetsInFlight[descSetsInFlight.size() - 1])
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descSets.emplace_back(std::move(descset));
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descSetsInFlight.resize(descSetsInFlight.size() - 1);
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}
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index = (index + 1) % descSetsInFlight.size();
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for (auto& descset : descSetsInFlight[index])
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descSets.emplace_back(std::move(descset));
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descSetsInFlight[index].clear();
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}
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vk::DescriptorSet alloc()
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{
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if (descSets.empty())
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{
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std::vector<vk::DescriptorSetLayout> layouts(allocChunk, layout);
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descSets = VulkanContext::Instance()->GetDevice().allocateDescriptorSetsUnique(
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vk::DescriptorSetAllocateInfo(VulkanContext::Instance()->GetDescriptorPool(), layouts));
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}
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descSetsInFlight[index].emplace_back(std::move(descSets.back()));
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descSets.pop_back();
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return *descSetsInFlight[index].back();
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}
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void term()
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{
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descSets.clear();
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descSetsInFlight.clear();
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}
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private:
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vk::DescriptorSetLayout layout;
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std::vector<vk::UniqueDescriptorSet> descSets;
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std::vector<std::vector<vk::UniqueDescriptorSet>> descSetsInFlight;
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int index = 0;
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int allocChunk = 10;
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};
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