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44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/shell/platform/embedder/vsync_waiter_embedder.h"
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namespace flutter {
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VsyncWaiterEmbedder::VsyncWaiterEmbedder(const VsyncCallback& vsync_callback,
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flutter::TaskRunners task_runners)
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: VsyncWaiter(std::move(task_runners)), vsync_callback_(vsync_callback) {
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FML_DCHECK(vsync_callback_);
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}
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VsyncWaiterEmbedder::~VsyncWaiterEmbedder() = default;
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// |VsyncWaiter|
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void VsyncWaiterEmbedder::AwaitVSync() {
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auto* weak_waiter = new std::weak_ptr<VsyncWaiter>(shared_from_this());
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vsync_callback_(reinterpret_cast<intptr_t>(weak_waiter));
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}
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// static
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bool VsyncWaiterEmbedder::OnEmbedderVsync(intptr_t baton,
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fml::TimePoint frame_start_time,
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fml::TimePoint frame_target_time) {
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if (baton == 0) {
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return false;
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}
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auto* weak_waiter = reinterpret_cast<std::weak_ptr<VsyncWaiter>*>(baton);
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auto strong_waiter = weak_waiter->lock();
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delete weak_waiter;
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if (!strong_waiter) {
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return false;
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}
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strong_waiter->FireCallback(frame_start_time, frame_target_time);
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return true;
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}
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} // namespace flutter
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