Craig Mautner | 1420b93 | 2012-12-28 17:14:38 -0800 | [diff] [blame] | 1 | // Copyright 2012 Google Inc. All Rights Reserved. |
| 2 | |
| 3 | package com.android.server.wm; |
| 4 | |
| 5 | import android.graphics.PixelFormat; |
| 6 | import android.os.SystemClock; |
| 7 | import android.util.Slog; |
| 8 | import android.view.DisplayInfo; |
| 9 | import android.view.Surface; |
Mathias Agopian | 3866f0d | 2013-02-11 22:08:48 -0800 | [diff] [blame] | 10 | import android.view.SurfaceControl; |
Craig Mautner | 1420b93 | 2012-12-28 17:14:38 -0800 | [diff] [blame] | 11 | |
| 12 | import java.io.PrintWriter; |
| 13 | |
| 14 | public class DimLayer { |
| 15 | private static final String TAG = "DimLayer"; |
Craig Mautner | c34bc11 | 2013-01-08 15:02:13 -0800 | [diff] [blame] | 16 | private static final boolean DEBUG = false; |
Craig Mautner | 1420b93 | 2012-12-28 17:14:38 -0800 | [diff] [blame] | 17 | |
| 18 | /** Reference to the owner of this object. */ |
| 19 | final DisplayContent mDisplayContent; |
| 20 | |
| 21 | /** Actual surface that dims */ |
Mathias Agopian | 3866f0d | 2013-02-11 22:08:48 -0800 | [diff] [blame] | 22 | SurfaceControl mDimSurface; |
Craig Mautner | 1420b93 | 2012-12-28 17:14:38 -0800 | [diff] [blame] | 23 | |
| 24 | /** Last value passed to mDimSurface.setAlpha() */ |
| 25 | float mAlpha = 0; |
| 26 | |
| 27 | /** Last value passed to mDimSurface.setLayer() */ |
| 28 | int mLayer = -1; |
| 29 | |
| 30 | /** Last values passed to mDimSurface.setSize() */ |
| 31 | int mLastDimWidth, mLastDimHeight; |
| 32 | |
| 33 | /** True after mDimSurface.show() has been called, false after mDimSurface.hide(). */ |
| 34 | private boolean mShowing = false; |
| 35 | |
| 36 | /** Value of mAlpha when beginning transition to mTargetAlpha */ |
| 37 | float mStartAlpha = 0; |
| 38 | |
| 39 | /** Final value of mAlpha following transition */ |
| 40 | float mTargetAlpha = 0; |
| 41 | |
| 42 | /** Time in units of SystemClock.uptimeMillis() at which the current transition started */ |
| 43 | long mStartTime; |
| 44 | |
| 45 | /** Time in milliseconds to take to transition from mStartAlpha to mTargetAlpha */ |
| 46 | long mDuration; |
| 47 | |
| 48 | DimLayer(WindowManagerService service, int displayId) { |
| 49 | if (DEBUG) Slog.v(TAG, "Ctor: displayId=" + displayId); |
| 50 | mDisplayContent = service.getDisplayContentLocked(displayId); |
Mathias Agopian | 3866f0d | 2013-02-11 22:08:48 -0800 | [diff] [blame] | 51 | SurfaceControl.openTransaction(); |
Craig Mautner | 1420b93 | 2012-12-28 17:14:38 -0800 | [diff] [blame] | 52 | try { |
| 53 | if (WindowManagerService.DEBUG_SURFACE_TRACE) { |
| 54 | mDimSurface = new WindowStateAnimator.SurfaceTrace(service.mFxSession, |
| 55 | "DimSurface", |
| 56 | 16, 16, PixelFormat.OPAQUE, |
Mathias Agopian | 3866f0d | 2013-02-11 22:08:48 -0800 | [diff] [blame] | 57 | SurfaceControl.FX_SURFACE_DIM | SurfaceControl.HIDDEN); |
Craig Mautner | 1420b93 | 2012-12-28 17:14:38 -0800 | [diff] [blame] | 58 | } else { |
Mathias Agopian | 3866f0d | 2013-02-11 22:08:48 -0800 | [diff] [blame] | 59 | mDimSurface = new SurfaceControl(service.mFxSession, TAG, |
Craig Mautner | 1420b93 | 2012-12-28 17:14:38 -0800 | [diff] [blame] | 60 | 16, 16, PixelFormat.OPAQUE, |
Mathias Agopian | 3866f0d | 2013-02-11 22:08:48 -0800 | [diff] [blame] | 61 | SurfaceControl.FX_SURFACE_DIM | SurfaceControl.HIDDEN); |
Craig Mautner | 1420b93 | 2012-12-28 17:14:38 -0800 | [diff] [blame] | 62 | } |
| 63 | if (WindowManagerService.SHOW_TRANSACTIONS || |
| 64 | WindowManagerService.SHOW_SURFACE_ALLOC) Slog.i(TAG, |
| 65 | " DIM " + mDimSurface + ": CREATE"); |
| 66 | mDimSurface.setLayerStack(displayId); |
| 67 | } catch (Exception e) { |
| 68 | Slog.e(WindowManagerService.TAG, "Exception creating Dim surface", e); |
| 69 | } finally { |
Mathias Agopian | 3866f0d | 2013-02-11 22:08:48 -0800 | [diff] [blame] | 70 | SurfaceControl.closeTransaction(); |
Craig Mautner | 1420b93 | 2012-12-28 17:14:38 -0800 | [diff] [blame] | 71 | } |
| 72 | } |
| 73 | |
| 74 | /** Return true if dim layer is showing */ |
| 75 | boolean isDimming() { |
| 76 | return mTargetAlpha != 0; |
| 77 | } |
| 78 | |
| 79 | /** Return true if in a transition period */ |
| 80 | boolean isAnimating() { |
| 81 | return mTargetAlpha != mAlpha; |
| 82 | } |
| 83 | |
| 84 | float getTargetAlpha() { |
| 85 | return mTargetAlpha; |
| 86 | } |
| 87 | |
Craig Mautner | 13131e7 | 2013-01-11 11:03:33 -0800 | [diff] [blame] | 88 | void setLayer(int layer) { |
| 89 | if (mLayer != layer) { |
| 90 | mLayer = layer; |
| 91 | mDimSurface.setLayer(layer); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | int getLayer() { |
| 96 | return mLayer; |
| 97 | } |
| 98 | |
Craig Mautner | 1420b93 | 2012-12-28 17:14:38 -0800 | [diff] [blame] | 99 | private void setAlpha(float alpha) { |
| 100 | if (mAlpha != alpha) { |
| 101 | if (DEBUG) Slog.v(TAG, "setAlpha alpha=" + alpha); |
| 102 | try { |
| 103 | mDimSurface.setAlpha(alpha); |
| 104 | if (alpha == 0 && mShowing) { |
| 105 | if (DEBUG) Slog.v(TAG, "setAlpha hiding"); |
| 106 | mDimSurface.hide(); |
| 107 | mShowing = false; |
| 108 | } else if (alpha > 0 && !mShowing) { |
| 109 | if (DEBUG) Slog.v(TAG, "setAlpha showing"); |
| 110 | mDimSurface.show(); |
| 111 | mShowing = true; |
| 112 | } |
| 113 | } catch (RuntimeException e) { |
| 114 | Slog.w(TAG, "Failure setting alpha immediately", e); |
| 115 | } |
| 116 | mAlpha = alpha; |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * @param duration The time to test. |
| 122 | * @return True if the duration would lead to an earlier end to the current animation. |
| 123 | */ |
| 124 | private boolean durationEndsEarlier(long duration) { |
| 125 | return SystemClock.uptimeMillis() + duration < mStartTime + mDuration; |
| 126 | } |
| 127 | |
| 128 | /** Jump to the end of the animation. |
| 129 | * NOTE: Must be called with Surface transaction open. */ |
| 130 | void show() { |
| 131 | if (isAnimating()) { |
| 132 | if (DEBUG) Slog.v(TAG, "show: immediate"); |
| 133 | show(mLayer, mTargetAlpha, 0); |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Begin an animation to a new dim value. |
| 139 | * NOTE: Must be called with Surface transaction open. |
| 140 | * |
| 141 | * @param layer The layer to set the surface to. |
| 142 | * @param alpha The dim value to end at. |
| 143 | * @param duration How long to take to get there in milliseconds. |
| 144 | */ |
| 145 | void show(int layer, float alpha, long duration) { |
| 146 | if (DEBUG) Slog.v(TAG, "show: layer=" + layer + " alpha=" + alpha |
| 147 | + " duration=" + duration); |
| 148 | if (mDimSurface == null) { |
| 149 | Slog.e(TAG, "show: no Surface"); |
| 150 | // Make sure isAnimating() returns false. |
| 151 | mTargetAlpha = mAlpha = 0; |
| 152 | return; |
| 153 | } |
| 154 | |
| 155 | // Set surface size to screen size. |
| 156 | final DisplayInfo info = mDisplayContent.getDisplayInfo(); |
| 157 | // Multiply by 1.5 so that rotating a frozen surface that includes this does not expose a |
| 158 | // corner. |
| 159 | final int dw = (int) (info.logicalWidth * 1.5); |
| 160 | final int dh = (int) (info.logicalHeight * 1.5); |
| 161 | // back off position so 1/4 of Surface is before and 1/4 is after. |
| 162 | final float xPos = -1 * dw / 6; |
| 163 | final float yPos = -1 * dh / 6; |
| 164 | |
| 165 | if (mLastDimWidth != dw || mLastDimHeight != dh || mLayer != layer) { |
| 166 | try { |
| 167 | mDimSurface.setPosition(xPos, yPos); |
| 168 | mDimSurface.setSize(dw, dh); |
| 169 | mDimSurface.setLayer(layer); |
| 170 | } catch (RuntimeException e) { |
| 171 | Slog.w(TAG, "Failure setting size or layer", e); |
| 172 | } |
| 173 | mLastDimWidth = dw; |
| 174 | mLastDimHeight = dh; |
| 175 | mLayer = layer; |
| 176 | } |
| 177 | |
| 178 | long curTime = SystemClock.uptimeMillis(); |
| 179 | final boolean animating = isAnimating(); |
| 180 | if ((animating && (mTargetAlpha != alpha || durationEndsEarlier(duration))) |
| 181 | || (!animating && mAlpha != alpha)) { |
| 182 | if (duration <= 0) { |
| 183 | // No animation required, just set values. |
| 184 | setAlpha(alpha); |
| 185 | } else { |
| 186 | // Start or continue animation with new parameters. |
| 187 | mStartAlpha = mAlpha; |
| 188 | mStartTime = curTime; |
| 189 | mDuration = duration; |
| 190 | } |
| 191 | } |
| 192 | if (DEBUG) Slog.v(TAG, "show: mStartAlpha=" + mStartAlpha + " mStartTime=" + mStartTime); |
| 193 | mTargetAlpha = alpha; |
| 194 | } |
| 195 | |
| 196 | /** Immediate hide. |
| 197 | * NOTE: Must be called with Surface transaction open. */ |
| 198 | void hide() { |
| 199 | if (mShowing) { |
| 200 | if (DEBUG) Slog.v(TAG, "hide: immediate"); |
| 201 | hide(0); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * Gradually fade to transparent. |
| 207 | * NOTE: Must be called with Surface transaction open. |
| 208 | * |
| 209 | * @param duration Time to fade in milliseconds. |
| 210 | */ |
| 211 | void hide(long duration) { |
| 212 | if (mShowing && (mTargetAlpha != 0 || durationEndsEarlier(duration))) { |
| 213 | if (DEBUG) Slog.v(TAG, "hide: duration=" + duration); |
| 214 | show(mLayer, 0, duration); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * Advance the dimming per the last #show(int, float, long) call. |
| 220 | * NOTE: Must be called with Surface transaction open. |
| 221 | * |
| 222 | * @return True if animation is still required after this step. |
| 223 | */ |
| 224 | boolean stepAnimation() { |
| 225 | if (mDimSurface == null) { |
| 226 | Slog.e(TAG, "stepAnimation: null Surface"); |
| 227 | // Ensure that isAnimating() returns false; |
| 228 | mTargetAlpha = mAlpha = 0; |
| 229 | return false; |
| 230 | } |
| 231 | |
| 232 | if (isAnimating()) { |
| 233 | final long curTime = SystemClock.uptimeMillis(); |
| 234 | final float alphaDelta = mTargetAlpha - mStartAlpha; |
| 235 | float alpha = mStartAlpha + alphaDelta * (curTime - mStartTime) / mDuration; |
| 236 | if (alphaDelta > 0 && alpha > mTargetAlpha || |
| 237 | alphaDelta < 0 && alpha < mTargetAlpha) { |
| 238 | // Don't exceed limits. |
| 239 | alpha = mTargetAlpha; |
| 240 | } |
| 241 | if (DEBUG) Slog.v(TAG, "stepAnimation: curTime=" + curTime + " alpha=" + alpha); |
| 242 | setAlpha(alpha); |
| 243 | } |
| 244 | |
| 245 | return isAnimating(); |
| 246 | } |
| 247 | |
| 248 | /** Cleanup */ |
| 249 | void destroySurface() { |
| 250 | if (DEBUG) Slog.v(TAG, "destroySurface."); |
| 251 | if (mDimSurface != null) { |
| 252 | mDimSurface.destroy(); |
| 253 | mDimSurface = null; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | public void printTo(String prefix, PrintWriter pw) { |
| 258 | pw.print(prefix); pw.print("mDimSurface="); pw.println(mDimSurface); |
| 259 | pw.print(prefix); pw.print(" mLayer="); pw.print(mLayer); |
| 260 | pw.print(" mAlpha="); pw.println(mAlpha); |
| 261 | pw.print(prefix); pw.print("mLastDimWidth="); pw.print(mLastDimWidth); |
| 262 | pw.print(" mLastDimWidth="); pw.println(mLastDimWidth); |
| 263 | pw.print(prefix); pw.print("Last animation: mStartTime="); pw.print(mStartTime); |
| 264 | pw.print(" mDuration="); pw.print(mDuration); |
| 265 | pw.print(" curTime="); pw.println(SystemClock.uptimeMillis()); |
| 266 | pw.print(" mStartAlpha="); pw.println(mStartAlpha); |
| 267 | pw.print(" mTargetAlpha="); pw.print(mTargetAlpha); |
| 268 | } |
| 269 | } |