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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "CCFrameRateController.h"
#include "CCSchedulerTestCommon.h"
#include <gtest/gtest.h>
using namespace WTF;
using namespace WebCore;
using namespace WebKitTests;
namespace {
class FakeCCFrameRateControllerClient : public WebCore::CCFrameRateControllerClient {
public:
FakeCCFrameRateControllerClient() { reset(); }
void reset() { m_vsyncTicked = false; }
bool vsyncTicked() const { return m_vsyncTicked; }
virtual void vsyncTick() { m_vsyncTicked = true; }
protected:
bool m_vsyncTicked;
};
TEST(CCFrameRateControllerTest, TestFrameThrottling_ImmediateAck)
{
FakeCCThread thread;
FakeCCFrameRateControllerClient client;
RefPtr<FakeCCDelayBasedTimeSource> timeSource = FakeCCDelayBasedTimeSource::create(1.0 / 60.0, &thread);
CCFrameRateController controller(timeSource);
controller.setClient(&client);
controller.setActive(true);
double elapsed = 0; // Muck around with time a bit
// Trigger one frame, make sure the vsync callback is called
elapsed += thread.pendingDelayMs() / 1000.0;
timeSource->setMonotonicTimeNow(elapsed);
thread.runPendingTask();
EXPECT_TRUE(client.vsyncTicked());
client.reset();
// Tell the controller we drew
controller.didBeginFrame();
// Tell the controller the frame ended 5ms later
timeSource->setMonotonicTimeNow(timeSource->monotonicTimeNow() + 0.005);
controller.didFinishFrame();
// Trigger another frame, make sure vsync runs again
elapsed += thread.pendingDelayMs() / 1000.0;
EXPECT_TRUE(elapsed >= timeSource->monotonicTimeNow()); // Sanity check that previous code didn't move time backward.
timeSource->setMonotonicTimeNow(elapsed);
thread.runPendingTask();
EXPECT_TRUE(client.vsyncTicked());
}
TEST(CCFrameRateControllerTest, TestFrameThrottling_TwoFramesInFlight)
{
FakeCCThread thread;
FakeCCFrameRateControllerClient client;
RefPtr<FakeCCDelayBasedTimeSource> timeSource = FakeCCDelayBasedTimeSource::create(1.0 / 60.0, &thread);
CCFrameRateController controller(timeSource);
controller.setClient(&client);
controller.setActive(true);
controller.setMaxFramesPending(2);
double elapsed = 0; // Muck around with time a bit
// Trigger one frame, make sure the vsync callback is called
elapsed += thread.pendingDelayMs() / 1000.0;
timeSource->setMonotonicTimeNow(elapsed);
thread.runPendingTask();
EXPECT_TRUE(client.vsyncTicked());
client.reset();
// Tell the controller we drew
controller.didBeginFrame();
// Trigger another frame, make sure vsync callback runs again
elapsed += thread.pendingDelayMs() / 1000.0;
EXPECT_TRUE(elapsed >= timeSource->monotonicTimeNow()); // Sanity check that previous code didn't move time backward.
timeSource->setMonotonicTimeNow(elapsed);
thread.runPendingTask();
EXPECT_TRUE(client.vsyncTicked());
client.reset();
// Tell the controller we drew, again.
controller.didBeginFrame();
// Trigger another frame. Since two frames are pending, we should not draw.
elapsed += thread.pendingDelayMs() / 1000.0;
EXPECT_TRUE(elapsed >= timeSource->monotonicTimeNow()); // Sanity check that previous code didn't move time backward.
timeSource->setMonotonicTimeNow(elapsed);
thread.runPendingTask();
EXPECT_FALSE(client.vsyncTicked());
// Tell the controller the first frame ended 5ms later
timeSource->setMonotonicTimeNow(timeSource->monotonicTimeNow() + 0.005);
controller.didFinishFrame();
// Tick should not have been called
EXPECT_FALSE(client.vsyncTicked());
// Trigger yet another frame. Since one frames is pending, another vsync callback should run.
elapsed += thread.pendingDelayMs() / 1000.0;
EXPECT_TRUE(elapsed >= timeSource->monotonicTimeNow()); // Sanity check that previous code didn't move time backward.
timeSource->setMonotonicTimeNow(elapsed);
thread.runPendingTask();
EXPECT_TRUE(client.vsyncTicked());
}
TEST(CCFrameRateControllerTest, TestFrameThrottling_Unthrottled)
{
FakeCCThread thread;
FakeCCFrameRateControllerClient client;
CCFrameRateController controller(&thread);
controller.setClient(&client);
controller.setMaxFramesPending(2);
// setActive triggers 1st frame, make sure the vsync callback is called
controller.setActive(true);
thread.runPendingTask();
EXPECT_TRUE(client.vsyncTicked());
client.reset();
// Even if we don't call didBeginFrame, CCFrameRateController should
// still attempt to vsync tick multiple times until it does result in
// a didBeginFrame.
thread.runPendingTask();
EXPECT_TRUE(client.vsyncTicked());
client.reset();
thread.runPendingTask();
EXPECT_TRUE(client.vsyncTicked());
client.reset();
// didBeginFrame triggers 2nd frame, make sure the vsync callback is called
controller.didBeginFrame();
thread.runPendingTask();
EXPECT_TRUE(client.vsyncTicked());
client.reset();
// didBeginFrame triggers 3rd frame (> maxFramesPending), make sure the vsync callback is NOT called
controller.didBeginFrame();
thread.runPendingTask();
EXPECT_FALSE(client.vsyncTicked());
client.reset();
// Make sure there is no pending task since we can't do anything until we receive a didFinishFrame anyway.
EXPECT_FALSE(thread.hasPendingTask());
// didFinishFrame triggers a frame, make sure the vsync callback is called
controller.didFinishFrame();
thread.runPendingTask();
EXPECT_TRUE(client.vsyncTicked());
}
}
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