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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/command_buffer/service/shared_image/dawn_shared_texture_cache.h"
#include "base/check_op.h"
namespace gpu {
DawnSharedTextureCache::TextureMetadata::TextureMetadata(
wgpu::TextureUsage usage,
wgpu::TextureUsage internal_usage,
const std::vector<wgpu::TextureFormat>& view_formats)
: usage(usage),
internal_usage(internal_usage),
view_formats(view_formats) {}
DawnSharedTextureCache::TextureMetadata::~TextureMetadata() = default;
DawnSharedTextureCache::TextureMetadata::TextureMetadata(TextureMetadata&&) =
default;
DawnSharedTextureCache::TextureMetadata&
DawnSharedTextureCache::TextureMetadata::operator=(TextureMetadata&&) = default;
DawnSharedTextureCache::SharedTextureData::SharedTextureData() = default;
DawnSharedTextureCache::SharedTextureData::~SharedTextureData() {
for (auto& [_, texture] : texture_cache) {
texture.Destroy();
}
}
DawnSharedTextureCache::SharedTextureData::SharedTextureData(
SharedTextureData&&) = default;
DawnSharedTextureCache::SharedTextureData&
DawnSharedTextureCache::SharedTextureData::operator=(SharedTextureData&&) =
default;
DawnSharedTextureCache::DawnSharedTextureCache() = default;
DawnSharedTextureCache::~DawnSharedTextureCache() = default;
DawnSharedTextureCache::TextureCache* DawnSharedTextureCache::GetTextureCache(
const wgpu::Device& device) {
auto iter = shared_texture_data_cache_.find(device.Get());
if (iter == shared_texture_data_cache_.end()) {
return nullptr;
}
return &iter->second.texture_cache;
}
wgpu::SharedTextureMemory DawnSharedTextureCache::GetSharedTextureMemory(
const wgpu::Device& device) {
auto iter = shared_texture_data_cache_.find(device.Get());
if (iter == shared_texture_data_cache_.end()) {
return nullptr;
}
return iter->second.shared_texture_memory;
}
void DawnSharedTextureCache::MaybeCacheSharedTextureMemory(
const wgpu::Device& device,
const wgpu::SharedTextureMemory& shared_texture_memory) {
if (!shared_texture_memory) {
return;
}
// Return early if the STM is already cached.
if (auto cached = GetSharedTextureMemory(device)) {
CHECK_EQ(cached.Get(), shared_texture_memory.Get());
return;
}
SharedTextureData shared_texture_data;
shared_texture_data.shared_texture_memory = shared_texture_memory;
shared_texture_data_cache_.emplace(device.Get(),
std::move(shared_texture_data));
}
wgpu::Texture DawnSharedTextureCache::GetCachedWGPUTexture(
const wgpu::Device& device,
wgpu::TextureUsage usage,
wgpu::TextureUsage internal_usage,
const std::vector<wgpu::TextureFormat>& view_formats) {
auto* texture_cache = GetTextureCache(device);
if (!texture_cache) {
return nullptr;
}
auto iter = texture_cache->find({usage, internal_usage, view_formats});
if (iter == texture_cache->end()) {
return nullptr;
}
return iter->second;
}
void DawnSharedTextureCache::RemoveWGPUTextureFromCache(
const wgpu::Device& device,
const wgpu::Texture& texture) {
auto* texture_cache = GetTextureCache(device);
if (!texture_cache) {
return;
}
base::EraseIf(*texture_cache, [&](const auto& kv_pair) {
return kv_pair.second.Get() == texture.Get();
});
}
void DawnSharedTextureCache::MaybeCacheWGPUTexture(
const wgpu::Device& device,
const wgpu::Texture& texture,
wgpu::TextureUsage usage,
wgpu::TextureUsage internal_usage,
const std::vector<wgpu::TextureFormat>& view_formats) {
if (!texture) {
return;
}
auto* texture_cache = GetTextureCache(device);
if (!texture_cache) {
return;
}
auto [iter, _] = texture_cache->try_emplace(
TextureMetadata{usage, internal_usage, view_formats}, texture);
CHECK_EQ(texture.Get(), iter->second.Get());
}
void DawnSharedTextureCache::DestroyWGPUTextureIfNotCached(
const wgpu::Device& device,
const wgpu::Texture& texture) {
if (!texture) {
return;
}
auto* texture_cache = GetTextureCache(device);
if (texture_cache) {
auto iter = std::ranges::find_if(*texture_cache, [&](const auto& kv_pair) {
return kv_pair.second.Get() == texture.Get();
});
if (iter != texture_cache->end()) {
return;
}
}
texture.Destroy();
}
void DawnSharedTextureCache::EraseDataIfDeviceLost() {
// Clear out any cached SharedTextureMemory instances for which the
// associated Device has been lost. This both saves memory and more
// importantly ensures that a new SharedTextureMemory instance will be
// created if another Device occupies the same memory as a previously-used,
// now-lost Device.
std::vector<WGPUDevice> devices_to_erase;
for (auto& [wgpu_device, shared_texture_data] : shared_texture_data_cache_) {
if (!shared_texture_data.shared_texture_memory.IsDeviceLost()) {
continue;
}
devices_to_erase.push_back(wgpu_device);
}
for (const auto& wgpu_device : devices_to_erase) {
shared_texture_data_cache_.erase(wgpu_device);
}
}
} // namespace gpu
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