blob: b4c14b824e55841ca375e2c6b7dc95f641c83535 [file] [log] [blame]
// Copyright 2020 The Fuchsia 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 "src/ui/lib/escher/resources/resource_recycler.h"
#include "src/ui/lib/escher/vk/sampler.h"
namespace escher {
// SamplerCache lazily creates and caches Samplers upon demand. These samplers are never released.
class SamplerCache final {
explicit SamplerCache(fxl::WeakPtr<ResourceRecycler> resource_recycler);
SamplerPtr ObtainSampler(vk::Filter filter, bool use_unnormalized_coordinates = false);
SamplerPtr ObtainYuvSampler(vk::Format format, vk::Filter filter,
bool use_unnormalized_coordinates = false);
// Return the number of samplers in the cache.
size_t size() const { return samplers_.size(); }
struct Key {
vk::Format format;
vk::Filter filter;
bool use_unnormalized_coordinates;
// Key equality and hashing, for storage in |samplers_|.
bool operator==(const Key& other) const;
struct Hash {
size_t operator()(const Key& key) const;
SamplerPtr ObtainSampler(const Key& key);
std::unordered_map<Key, SamplerPtr, Key::Hash> samplers_;
fxl::WeakPtr<ResourceRecycler> resource_recycler_;
} // namespace escher