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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/viz/service/transitions/transferable_resource_tracker.h"
#include <limits>
#include <memory>
#include <utility>
#include "base/containers/contains.h"
#include "components/viz/common/resources/release_callback.h"
#include "components/viz/common/resources/resource_id.h"
#include "components/viz/common/resources/transferable_resource.h"
#include "gpu/command_buffer/common/mailbox.h"
#include "gpu/command_buffer/common/sync_token.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gl/gl_bindings.h"
namespace viz {
TransferableResourceTracker::TransferableResourceTracker(
ReservedResourceIdTracker* id_tracker)
: id_tracker_(id_tracker) {
CHECK(id_tracker_);
}
TransferableResourceTracker::~TransferableResourceTracker() = default;
TransferableResourceTracker::ResourceFrame
TransferableResourceTracker::ImportResources(
SurfaceSavedFrame::FrameResult frame_result,
CompositorFrameTransitionDirective directive) {
ResourceFrame resource_frame;
resource_frame.shared.resize(frame_result.shared_results.size());
for (size_t i = 0; i < frame_result.shared_results.size(); ++i) {
auto& shared_result = frame_result.shared_results[i];
if (shared_result.has_value()) {
resource_frame.shared[i].emplace(
ImportResource(std::move(*shared_result)));
auto view_transition_element_resource_id =
directive.shared_elements()[i].view_transition_element_resource_id;
if (view_transition_element_resource_id.IsValid()) {
resource_frame
.element_id_to_resource[view_transition_element_resource_id] =
resource_frame.shared[i]->resource;
}
}
}
for (auto resource_id : frame_result.empty_resource_ids) {
DCHECK(!resource_frame.element_id_to_resource.contains(resource_id));
resource_frame.element_id_to_resource[resource_id] = TransferableResource();
}
return resource_frame;
}
TransferableResourceTracker::PositionedResource
TransferableResourceTracker::ImportResource(
SurfaceSavedFrame::OutputCopyResult output_copy) {
auto resource = TransferableResource::Make(
output_copy.shared_image,
TransferableResource::ResourceSource::kViewTransition,
output_copy.sync_token);
TransferableResourceHolder::ResourceReleaseCallback release_callback;
if (output_copy.release_callback) {
release_callback = base::BindOnce(
[](ReleaseCallback callback, const TransferableResource& resource,
const gpu::SyncToken& sync_token) {
std::move(callback).Run(sync_token, /*is_lost=*/false);
},
std::move(output_copy.release_callback));
}
resource.id = id_tracker_->AllocId(/*initial_ref_count=*/1);
DCHECK(!base::Contains(managed_resources_, resource.id));
managed_resources_.emplace(
resource.id,
TransferableResourceHolder(resource, std::move(release_callback)));
PositionedResource result;
result.resource = resource;
return result;
}
void TransferableResourceTracker::ReturnFrame(const ResourceFrame& frame) {
for (const auto& shared : frame.shared) {
if (shared.has_value()) {
UnrefResource(shared->resource.id, /*count=*/1, gpu::SyncToken());
}
}
}
void TransferableResourceTracker::RefResource(ResourceId id) {
if (!base::Contains(managed_resources_, id)) {
return;
}
id_tracker_->RefId(id, /*count=*/1);
}
void TransferableResourceTracker::UnrefResource(
ResourceId id,
int count,
const gpu::SyncToken& sync_token) {
if (!base::Contains(managed_resources_, id)) {
return;
}
// Always update the release sync token, even if we're still keeping the
// resource. This way, if we first return it from the display compositor and
// then release it from surface animation manager, we will still have the
// right sync token.
if (sync_token.HasData()) {
auto it = managed_resources_.find(id);
CHECK(it != managed_resources_.end());
it->second.release_sync_token = sync_token;
}
if (id_tracker_->UnrefId(id, count)) {
managed_resources_.erase(id);
}
}
TransferableResourceTracker::TransferableResourceHolder::
TransferableResourceHolder() = default;
TransferableResourceTracker::TransferableResourceHolder::
TransferableResourceHolder(TransferableResourceHolder&& other) = default;
TransferableResourceTracker::TransferableResourceHolder::
TransferableResourceHolder(const TransferableResource& resource,
ResourceReleaseCallback release_callback)
: resource(resource), release_callback(std::move(release_callback)) {}
TransferableResourceTracker::TransferableResourceHolder::
~TransferableResourceHolder() {
if (release_callback) {
std::move(release_callback).Run(resource, release_sync_token);
}
}
TransferableResourceTracker::TransferableResourceHolder&
TransferableResourceTracker::TransferableResourceHolder::operator=(
TransferableResourceHolder&& other) = default;
TransferableResourceTracker::ResourceFrame::ResourceFrame() = default;
TransferableResourceTracker::ResourceFrame::ResourceFrame(
ResourceFrame&& other) = default;
TransferableResourceTracker::ResourceFrame::~ResourceFrame() = default;
TransferableResourceTracker::ResourceFrame&
TransferableResourceTracker::ResourceFrame::operator=(ResourceFrame&& other) =
default;
} // namespace viz
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