The Tor Browser / file comparison
comparison: mobile/android/base/gfx/PanningPerfAPI.java
mobile/android/base/gfx/PanningPerfAPI.java
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:c7a9f06bdc77 |
|---|---|
| 1 /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*- | |
| 2 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 package org.mozilla.gecko.gfx; | |
| 7 | |
| 8 import org.mozilla.gecko.mozglue.RobocopTarget; | |
| 9 | |
| 10 import android.os.SystemClock; | |
| 11 import android.util.Log; | |
| 12 | |
| 13 import java.util.ArrayList; | |
| 14 import java.util.List; | |
| 15 | |
| 16 public class PanningPerfAPI { | |
| 17 private static final String LOGTAG = "GeckoPanningPerfAPI"; | |
| 18 | |
| 19 // make this large enough to avoid having to resize the frame time | |
| 20 // list, as that may be expensive and impact the thing we're trying | |
| 21 // to measure. | |
| 22 private static final int EXPECTED_FRAME_COUNT = 2048; | |
| 23 | |
| 24 private static boolean mRecordingFrames = false; | |
| 25 private static List<Long> mFrameTimes; | |
| 26 private static long mFrameStartTime; | |
| 27 | |
| 28 private static boolean mRecordingCheckerboard = false; | |
| 29 private static List<Float> mCheckerboardAmounts; | |
| 30 private static long mCheckerboardStartTime; | |
| 31 | |
| 32 private static void initialiseRecordingArrays() { | |
| 33 if (mFrameTimes == null) { | |
| 34 mFrameTimes = new ArrayList<Long>(EXPECTED_FRAME_COUNT); | |
| 35 } else { | |
| 36 mFrameTimes.clear(); | |
| 37 } | |
| 38 if (mCheckerboardAmounts == null) { | |
| 39 mCheckerboardAmounts = new ArrayList<Float>(EXPECTED_FRAME_COUNT); | |
| 40 } else { | |
| 41 mCheckerboardAmounts.clear(); | |
| 42 } | |
| 43 } | |
| 44 | |
| 45 @RobocopTarget | |
| 46 public static void startFrameTimeRecording() { | |
| 47 if (mRecordingFrames || mRecordingCheckerboard) { | |
| 48 Log.e(LOGTAG, "Error: startFrameTimeRecording() called while already recording!"); | |
| 49 return; | |
| 50 } | |
| 51 mRecordingFrames = true; | |
| 52 initialiseRecordingArrays(); | |
| 53 mFrameStartTime = SystemClock.uptimeMillis(); | |
| 54 } | |
| 55 | |
| 56 @RobocopTarget | |
| 57 public static List<Long> stopFrameTimeRecording() { | |
| 58 if (!mRecordingFrames) { | |
| 59 Log.e(LOGTAG, "Error: stopFrameTimeRecording() called when not recording!"); | |
| 60 return null; | |
| 61 } | |
| 62 mRecordingFrames = false; | |
| 63 return mFrameTimes; | |
| 64 } | |
| 65 | |
| 66 public static void recordFrameTime() { | |
| 67 // this will be called often, so try to make it as quick as possible | |
| 68 if (mRecordingFrames) { | |
| 69 mFrameTimes.add(SystemClock.uptimeMillis() - mFrameStartTime); | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 public static boolean isRecordingCheckerboard() { | |
| 74 return mRecordingCheckerboard; | |
| 75 } | |
| 76 | |
| 77 @RobocopTarget | |
| 78 public static void startCheckerboardRecording() { | |
| 79 if (mRecordingCheckerboard || mRecordingFrames) { | |
| 80 Log.e(LOGTAG, "Error: startCheckerboardRecording() called while already recording!"); | |
| 81 return; | |
| 82 } | |
| 83 mRecordingCheckerboard = true; | |
| 84 initialiseRecordingArrays(); | |
| 85 mCheckerboardStartTime = SystemClock.uptimeMillis(); | |
| 86 } | |
| 87 | |
| 88 @RobocopTarget | |
| 89 public static List<Float> stopCheckerboardRecording() { | |
| 90 if (!mRecordingCheckerboard) { | |
| 91 Log.e(LOGTAG, "Error: stopCheckerboardRecording() called when not recording!"); | |
| 92 return null; | |
| 93 } | |
| 94 mRecordingCheckerboard = false; | |
| 95 | |
| 96 // We take the number of values in mCheckerboardAmounts here, as there's | |
| 97 // the possibility that this function is called while recordCheckerboard | |
| 98 // is still executing. As values are added to this list last, we use | |
| 99 // this number as the canonical number of recordings. | |
| 100 int values = mCheckerboardAmounts.size(); | |
| 101 | |
| 102 // The score will be the sum of all the values in mCheckerboardAmounts, | |
| 103 // so weight the checkerboard values by time so that frame-rate and | |
| 104 // run-length don't affect score. | |
| 105 long lastTime = 0; | |
| 106 float totalTime = mFrameTimes.get(values - 1); | |
| 107 for (int i = 0; i < values; i++) { | |
| 108 long elapsedTime = mFrameTimes.get(i) - lastTime; | |
| 109 mCheckerboardAmounts.set(i, mCheckerboardAmounts.get(i) * elapsedTime / totalTime); | |
| 110 lastTime += elapsedTime; | |
| 111 } | |
| 112 | |
| 113 return mCheckerboardAmounts; | |
| 114 } | |
| 115 | |
| 116 public static void recordCheckerboard(float amount) { | |
| 117 // this will be called often, so try to make it as quick as possible | |
| 118 if (mRecordingCheckerboard) { | |
| 119 mFrameTimes.add(SystemClock.uptimeMillis() - mCheckerboardStartTime); | |
| 120 mCheckerboardAmounts.add(amount); | |
| 121 } | |
| 122 } | |
| 123 } |
