sampler_library_vk.cc

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "impeller/renderer/backend/vulkan/sampler_library_vk.h"
 
#include "impeller/renderer/backend/vulkan/context_vk.h"
#include "impeller/renderer/backend/vulkan/formats_vk.h"
#include "impeller/renderer/backend/vulkan/sampler_vk.h"
 
namespace impeller {
 
SamplerLibraryVK::SamplerLibraryVK(
    const std::weak_ptr<DeviceHolderVK>& device_holder)
    : device_holder_(device_holder) {}
 
SamplerLibraryVK::~SamplerLibraryVK() = default;
 
static const std::unique_ptr<const Sampler> kNullSampler = nullptr;
 
const std::unique_ptr<const Sampler>& SamplerLibraryVK::GetSampler(
    SamplerDescriptor desc) {
  auto found = samplers_.find(desc);
  if (found != samplers_.end()) {
    return found->second;
  }
  auto device_holder = device_holder_.lock();
  if (!device_holder || !device_holder->GetDevice()) {
    return kNullSampler;
  }
  return (samplers_[desc] =
              std::make_unique<SamplerVK>(device_holder->GetDevice(), desc));
}
 
}  // namespace impeller