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/* Copyright (C) 2023 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef INCLUDED_RENDERER_BACKEND_VULKAN_SAMPLERMANAGER
#define INCLUDED_RENDERER_BACKEND_VULKAN_SAMPLERMANAGER
#include "renderer/backend/Sampler.h"
#include <glad/vulkan.h>
#include <memory>
#include <unordered_map>
namespace Renderer
{
namespace Backend
{
namespace Vulkan
{
class CDevice;
/**
* A helper class to store unique samplers. The manager doesn't track usages of
* its samplers but keep them alive until its end. So before destroying the
* manager its owner should guarantee no usage.
*/
class CSamplerManager
{
public:
CSamplerManager(CDevice* device);
~CSamplerManager();
/**
* @return a sampler matches the description. The returned sampler is owned by
* the manager.
*/
VkSampler GetOrCreateSampler(const Sampler::Desc& samplerDesc);
private:
CDevice* m_Device = nullptr;
struct SamplerDescHash
{
size_t operator()(const Sampler::Desc& samplerDesc) const;
};
struct SamplerDescEqual
{
bool operator()(const Sampler::Desc& lhs, const Sampler::Desc& rhs) const;
};
std::unordered_map<Sampler::Desc, VkSampler, SamplerDescHash, SamplerDescEqual> m_SamplerMap;
};
} // namespace Vulkan
} // namespace Backend
} // namespace Renderer
#endif // INCLUDED_RENDERER_BACKEND_VULKAN_SAMPLERMANAGER
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