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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.gfx;
import android.os.SystemClock;
import android.util.Log;
import java.util.ArrayList;
import java.util.List;
import org.mozilla.gecko.annotation.RobocopTarget;
public final class PanningPerfAPI {
private static final String LOGTAG = "GeckoPanningPerfAPI";
// make this large enough to avoid having to resize the frame time
// list, as that may be expensive and impact the thing we're trying
// to measure.
private static final int EXPECTED_FRAME_COUNT = 2048;
private static boolean mRecordingFrames;
private static List<Long> mFrameTimes;
private static long mFrameStartTime;
private static void initialiseRecordingArrays() {
if (mFrameTimes == null) {
mFrameTimes = new ArrayList<Long>(EXPECTED_FRAME_COUNT);
} else {
mFrameTimes.clear();
}
}
@RobocopTarget
public static void startFrameTimeRecording() {
if (mRecordingFrames) {
Log.e(LOGTAG, "Error: startFrameTimeRecording() called while already recording!");
return;
}
mRecordingFrames = true;
initialiseRecordingArrays();
mFrameStartTime = SystemClock.uptimeMillis();
}
@RobocopTarget
public static List<Long> stopFrameTimeRecording() {
if (!mRecordingFrames) {
Log.e(LOGTAG, "Error: stopFrameTimeRecording() called when not recording!");
return null;
}
mRecordingFrames = false;
return mFrameTimes;
}
public static void recordFrameTime() {
// this will be called often, so try to make it as quick as possible
if (mRecordingFrames) {
mFrameTimes.add(SystemClock.uptimeMillis() - mFrameStartTime);
}
}
@RobocopTarget
public static void startCheckerboardRecording() {
throw new UnsupportedOperationException();
}
@RobocopTarget
public static List<Float> stopCheckerboardRecording() {
throw new UnsupportedOperationException();
}
}
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