1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.view; 18 19 import com.android.internal.view.BaseIWindow; 20 21 import android.content.Context; 22 import android.content.res.Configuration; 23 import android.content.res.CompatibilityInfo.Translator; 24 import android.graphics.Canvas; 25 import android.graphics.PixelFormat; 26 import android.graphics.PorterDuff; 27 import android.graphics.Rect; 28 import android.graphics.Region; 29 import android.os.Handler; 30 import android.os.Message; 31 import android.os.RemoteException; 32 import android.os.SystemClock; 33 import android.os.ParcelFileDescriptor; 34 import android.util.AttributeSet; 35 import android.util.Log; 36 37 import java.lang.ref.WeakReference; 38 import java.util.ArrayList; 39 import java.util.concurrent.locks.ReentrantLock; 40 41 /** 42 * Provides a dedicated drawing surface embedded inside of a view hierarchy. 43 * You can control the format of this surface and, if you like, its size; the 44 * SurfaceView takes care of placing the surface at the correct location on the 45 * screen 46 * 47 * <p>The surface is Z ordered so that it is behind the window holding its 48 * SurfaceView; the SurfaceView punches a hole in its window to allow its 49 * surface to be displayed. The view hierarchy will take care of correctly 50 * compositing with the Surface any siblings of the SurfaceView that would 51 * normally appear on top of it. This can be used to place overlays such as 52 * buttons on top of the Surface, though note however that it can have an 53 * impact on performance since a full alpha-blended composite will be performed 54 * each time the Surface changes. 55 * 56 * <p> The transparent region that makes the surface visible is based on the 57 * layout positions in the view hierarchy. If the post-layout transform 58 * properties are used to draw a sibling view on top of the SurfaceView, the 59 * view may not be properly composited with the surface. 60 * 61 * <p>Access to the underlying surface is provided via the SurfaceHolder interface, 62 * which can be retrieved by calling {@link #getHolder}. 63 * 64 * <p>The Surface will be created for you while the SurfaceView's window is 65 * visible; you should implement {@link SurfaceHolder.Callback#surfaceCreated} 66 * and {@link SurfaceHolder.Callback#surfaceDestroyed} to discover when the 67 * Surface is created and destroyed as the window is shown and hidden. 68 * 69 * <p>One of the purposes of this class is to provide a surface in which a 70 * secondary thread can render into the screen. If you are going to use it 71 * this way, you need to be aware of some threading semantics: 72 * 73 * <ul> 74 * <li> All SurfaceView and 75 * {@link SurfaceHolder.Callback SurfaceHolder.Callback} methods will be called 76 * from the thread running the SurfaceView's window (typically the main thread 77 * of the application). They thus need to correctly synchronize with any 78 * state that is also touched by the drawing thread. 79 * <li> You must ensure that the drawing thread only touches the underlying 80 * Surface while it is valid -- between 81 * {@link SurfaceHolder.Callback#surfaceCreated SurfaceHolder.Callback.surfaceCreated()} 82 * and 83 * {@link SurfaceHolder.Callback#surfaceDestroyed SurfaceHolder.Callback.surfaceDestroyed()}. 84 * </ul> 85 */ 86 public class SurfaceView extends View { 87 static private final String TAG = "SurfaceView"; 88 static private final boolean DEBUG = false; 89 90 final ArrayList<SurfaceHolder.Callback> mCallbacks 91 = new ArrayList<SurfaceHolder.Callback>(); 92 93 final int[] mLocation = new int[2]; 94 95 final ReentrantLock mSurfaceLock = new ReentrantLock(); 96 final Surface mSurface = new Surface(); // Current surface in use 97 final Surface mNewSurface = new Surface(); // New surface we are switching to 98 boolean mDrawingStopped = true; 99 100 final WindowManager.LayoutParams mLayout 101 = new WindowManager.LayoutParams(); 102 IWindowSession mSession; 103 MyWindow mWindow; 104 final Rect mVisibleInsets = new Rect(); 105 final Rect mWinFrame = new Rect(); 106 final Rect mOverscanInsets = new Rect(); 107 final Rect mContentInsets = new Rect(); 108 final Configuration mConfiguration = new Configuration(); 109 110 static final int KEEP_SCREEN_ON_MSG = 1; 111 static final int GET_NEW_SURFACE_MSG = 2; 112 static final int UPDATE_WINDOW_MSG = 3; 113 114 int mWindowType = WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA; 115 116 boolean mIsCreating = false; 117 118 final Handler mHandler = new Handler() { 119 @Override 120 public void handleMessage(Message msg) { 121 switch (msg.what) { 122 case KEEP_SCREEN_ON_MSG: { 123 setKeepScreenOn(msg.arg1 != 0); 124 } break; 125 case GET_NEW_SURFACE_MSG: { 126 handleGetNewSurface(); 127 } break; 128 case UPDATE_WINDOW_MSG: { 129 updateWindow(false, false); 130 } break; 131 } 132 } 133 }; 134 135 final ViewTreeObserver.OnScrollChangedListener mScrollChangedListener 136 = new ViewTreeObserver.OnScrollChangedListener() { 137 @Override 138 public void onScrollChanged() { 139 updateWindow(false, false); 140 } 141 }; 142 143 boolean mRequestedVisible = false; 144 boolean mWindowVisibility = false; 145 boolean mViewVisibility = false; 146 int mRequestedWidth = -1; 147 int mRequestedHeight = -1; 148 /* Set SurfaceView's format to 565 by default to maintain backward 149 * compatibility with applications assuming this format. 150 */ 151 int mRequestedFormat = PixelFormat.RGB_565; 152 153 boolean mHaveFrame = false; 154 boolean mSurfaceCreated = false; 155 long mLastLockTime = 0; 156 157 boolean mVisible = false; 158 int mLeft = -1; 159 int mTop = -1; 160 int mWidth = -1; 161 int mHeight = -1; 162 int mFormat = -1; 163 final Rect mSurfaceFrame = new Rect(); 164 int mLastSurfaceWidth = -1, mLastSurfaceHeight = -1; 165 boolean mUpdateWindowNeeded; 166 boolean mReportDrawNeeded; 167 private Translator mTranslator; 168 169 private final ViewTreeObserver.OnPreDrawListener mDrawListener = 170 new ViewTreeObserver.OnPreDrawListener() { 171 @Override 172 public boolean onPreDraw() { 173 // reposition ourselves where the surface is 174 mHaveFrame = getWidth() > 0 && getHeight() > 0; 175 updateWindow(false, false); 176 return true; 177 } 178 }; 179 private boolean mGlobalListenersAdded; 180 181 public SurfaceView(Context context) { 182 super(context); 183 init(); 184 } 185 186 public SurfaceView(Context context, AttributeSet attrs) { 187 super(context, attrs); 188 init(); 189 } 190 191 public SurfaceView(Context context, AttributeSet attrs, int defStyle) { 192 super(context, attrs, defStyle); 193 init(); 194 } 195 196 private void init() { 197 setWillNotDraw(true); 198 } 199 200 /** 201 * Return the SurfaceHolder providing access and control over this 202 * SurfaceView's underlying surface. 203 * 204 * @return SurfaceHolder The holder of the surface. 205 */ 206 public SurfaceHolder getHolder() { 207 return mSurfaceHolder; 208 } 209 210 @Override 211 protected void onAttachedToWindow() { 212 super.onAttachedToWindow(); 213 mParent.requestTransparentRegion(this); 214 mSession = getWindowSession(); 215 mLayout.token = getWindowToken(); 216 mLayout.setTitle("SurfaceView"); 217 mViewVisibility = getVisibility() == VISIBLE; 218 219 if (!mGlobalListenersAdded) { 220 ViewTreeObserver observer = getViewTreeObserver(); 221 observer.addOnScrollChangedListener(mScrollChangedListener); 222 observer.addOnPreDrawListener(mDrawListener); 223 mGlobalListenersAdded = true; 224 } 225 } 226 227 @Override 228 protected void onWindowVisibilityChanged(int visibility) { 229 super.onWindowVisibilityChanged(visibility); 230 mWindowVisibility = visibility == VISIBLE; 231 mRequestedVisible = mWindowVisibility && mViewVisibility; 232 updateWindow(false, false); 233 } 234 235 @Override 236 public void setVisibility(int visibility) { 237 super.setVisibility(visibility); 238 mViewVisibility = visibility == VISIBLE; 239 boolean newRequestedVisible = mWindowVisibility && mViewVisibility; 240 if (newRequestedVisible != mRequestedVisible) { 241 // our base class (View) invalidates the layout only when 242 // we go from/to the GONE state. However, SurfaceView needs 243 // to request a re-layout when the visibility changes at all. 244 // This is needed because the transparent region is computed 245 // as part of the layout phase, and it changes (obviously) when 246 // the visibility changes. 247 requestLayout(); 248 } 249 mRequestedVisible = newRequestedVisible; 250 updateWindow(false, false); 251 } 252 253 @Override 254 protected void onDetachedFromWindow() { 255 if (mGlobalListenersAdded) { 256 ViewTreeObserver observer = getViewTreeObserver(); 257 observer.removeOnScrollChangedListener(mScrollChangedListener); 258 observer.removeOnPreDrawListener(mDrawListener); 259 mGlobalListenersAdded = false; 260 } 261 262 mRequestedVisible = false; 263 updateWindow(false, false); 264 mHaveFrame = false; 265 if (mWindow != null) { 266 try { 267 mSession.remove(mWindow); 268 } catch (RemoteException ex) { 269 // Not much we can do here... 270 } 271 mWindow = null; 272 } 273 mSession = null; 274 mLayout.token = null; 275 276 super.onDetachedFromWindow(); 277 } 278 279 @Override 280 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 281 int width = mRequestedWidth >= 0 282 ? resolveSizeAndState(mRequestedWidth, widthMeasureSpec, 0) 283 : getDefaultSize(0, widthMeasureSpec); 284 int height = mRequestedHeight >= 0 285 ? resolveSizeAndState(mRequestedHeight, heightMeasureSpec, 0) 286 : getDefaultSize(0, heightMeasureSpec); 287 setMeasuredDimension(width, height); 288 } 289 290 /** @hide */ 291 @Override 292 protected boolean setFrame(int left, int top, int right, int bottom) { 293 boolean result = super.setFrame(left, top, right, bottom); 294 updateWindow(false, false); 295 return result; 296 } 297 298 @Override 299 public boolean gatherTransparentRegion(Region region) { 300 if (mWindowType == WindowManager.LayoutParams.TYPE_APPLICATION_PANEL) { 301 return super.gatherTransparentRegion(region); 302 } 303 304 boolean opaque = true; 305 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == 0) { 306 // this view draws, remove it from the transparent region 307 opaque = super.gatherTransparentRegion(region); 308 } else if (region != null) { 309 int w = getWidth(); 310 int h = getHeight(); 311 if (w>0 && h>0) { 312 getLocationInWindow(mLocation); 313 // otherwise, punch a hole in the whole hierarchy 314 int l = mLocation[0]; 315 int t = mLocation[1]; 316 region.op(l, t, l+w, t+h, Region.Op.UNION); 317 } 318 } 319 if (PixelFormat.formatHasAlpha(mRequestedFormat)) { 320 opaque = false; 321 } 322 return opaque; 323 } 324 325 @Override 326 public void draw(Canvas canvas) { 327 if (mWindowType != WindowManager.LayoutParams.TYPE_APPLICATION_PANEL) { 328 // draw() is not called when SKIP_DRAW is set 329 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == 0) { 330 // punch a whole in the view-hierarchy below us 331 canvas.drawColor(0, PorterDuff.Mode.CLEAR); 332 } 333 } 334 super.draw(canvas); 335 } 336 337 @Override 338 protected void dispatchDraw(Canvas canvas) { 339 if (mWindowType != WindowManager.LayoutParams.TYPE_APPLICATION_PANEL) { 340 // if SKIP_DRAW is cleared, draw() has already punched a hole 341 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 342 // punch a whole in the view-hierarchy below us 343 canvas.drawColor(0, PorterDuff.Mode.CLEAR); 344 } 345 } 346 super.dispatchDraw(canvas); 347 } 348 349 /** 350 * Control whether the surface view's surface is placed on top of another 351 * regular surface view in the window (but still behind the window itself). 352 * This is typically used to place overlays on top of an underlying media 353 * surface view. 354 * 355 * <p>Note that this must be set before the surface view's containing 356 * window is attached to the window manager. 357 * 358 * <p>Calling this overrides any previous call to {@link #setZOrderOnTop}. 359 */ 360 public void setZOrderMediaOverlay(boolean isMediaOverlay) { 361 mWindowType = isMediaOverlay 362 ? WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA_OVERLAY 363 : WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA; 364 } 365 366 /** 367 * Control whether the surface view's surface is placed on top of its 368 * window. Normally it is placed behind the window, to allow it to 369 * (for the most part) appear to composite with the views in the 370 * hierarchy. By setting this, you cause it to be placed above the 371 * window. This means that none of the contents of the window this 372 * SurfaceView is in will be visible on top of its surface. 373 * 374 * <p>Note that this must be set before the surface view's containing 375 * window is attached to the window manager. 376 * 377 * <p>Calling this overrides any previous call to {@link #setZOrderMediaOverlay}. 378 */ 379 public void setZOrderOnTop(boolean onTop) { 380 if (onTop) { 381 mWindowType = WindowManager.LayoutParams.TYPE_APPLICATION_PANEL; 382 // ensures the surface is placed below the IME 383 mLayout.flags |= WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM; 384 } else { 385 mWindowType = WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA; 386 mLayout.flags &= ~WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM; 387 } 388 } 389 390 /** 391 * Control whether the surface view's content should be treated as secure, 392 * preventing it from appearing in screenshots or from being viewed on 393 * non-secure displays. 394 * 395 * <p>Note that this must be set before the surface view's containing 396 * window is attached to the window manager. 397 * 398 * <p>See {@link android.view.Display#FLAG_SECURE} for details. 399 * 400 * @param isSecure True if the surface view is secure. 401 */ 402 public void setSecure(boolean isSecure) { 403 if (isSecure) { 404 mLayout.flags |= WindowManager.LayoutParams.FLAG_SECURE; 405 } else { 406 mLayout.flags &= ~WindowManager.LayoutParams.FLAG_SECURE; 407 } 408 } 409 410 /** 411 * Hack to allow special layering of windows. The type is one of the 412 * types in WindowManager.LayoutParams. This is a hack so: 413 * @hide 414 */ 415 public void setWindowType(int type) { 416 mWindowType = type; 417 } 418 419 private void updateWindow(boolean force, boolean redrawNeeded) { 420 if (!mHaveFrame) { 421 return; 422 } 423 ViewRootImpl viewRoot = getViewRootImpl(); 424 if (viewRoot != null) { 425 mTranslator = viewRoot.mTranslator; 426 } 427 428 if (mTranslator != null) { 429 mSurface.setCompatibilityTranslator(mTranslator); 430 } 431 432 int myWidth = mRequestedWidth; 433 if (myWidth <= 0) myWidth = getWidth(); 434 int myHeight = mRequestedHeight; 435 if (myHeight <= 0) myHeight = getHeight(); 436 437 getLocationInWindow(mLocation); 438 final boolean creating = mWindow == null; 439 final boolean formatChanged = mFormat != mRequestedFormat; 440 final boolean sizeChanged = mWidth != myWidth || mHeight != myHeight; 441 final boolean visibleChanged = mVisible != mRequestedVisible; 442 443 if (force || creating || formatChanged || sizeChanged || visibleChanged 444 || mLeft != mLocation[0] || mTop != mLocation[1] 445 || mUpdateWindowNeeded || mReportDrawNeeded || redrawNeeded) { 446 447 if (DEBUG) Log.i(TAG, "Changes: creating=" + creating 448 + " format=" + formatChanged + " size=" + sizeChanged 449 + " visible=" + visibleChanged 450 + " left=" + (mLeft != mLocation[0]) 451 + " top=" + (mTop != mLocation[1])); 452 453 try { 454 final boolean visible = mVisible = mRequestedVisible; 455 mLeft = mLocation[0]; 456 mTop = mLocation[1]; 457 mWidth = myWidth; 458 mHeight = myHeight; 459 mFormat = mRequestedFormat; 460 461 // Scaling/Translate window's layout here because mLayout is not used elsewhere. 462 463 // Places the window relative 464 mLayout.x = mLeft; 465 mLayout.y = mTop; 466 mLayout.width = getWidth(); 467 mLayout.height = getHeight(); 468 if (mTranslator != null) { 469 mTranslator.translateLayoutParamsInAppWindowToScreen(mLayout); 470 } 471 472 mLayout.format = mRequestedFormat; 473 mLayout.flags |=WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE 474 | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE 475 | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS 476 | WindowManager.LayoutParams.FLAG_SCALED 477 | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE 478 | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE 479 ; 480 if (!getContext().getResources().getCompatibilityInfo().supportsScreen()) { 481 mLayout.privateFlags |= 482 WindowManager.LayoutParams.PRIVATE_FLAG_COMPATIBLE_WINDOW; 483 } 484 mLayout.privateFlags |= WindowManager.LayoutParams.PRIVATE_FLAG_NO_MOVE_ANIMATION; 485 486 if (mWindow == null) { 487 Display display = getDisplay(); 488 mWindow = new MyWindow(this); 489 mLayout.type = mWindowType; 490 mLayout.gravity = Gravity.START|Gravity.TOP; 491 mSession.addToDisplayWithoutInputChannel(mWindow, mWindow.mSeq, mLayout, 492 mVisible ? VISIBLE : GONE, display.getDisplayId(), mContentInsets); 493 } 494 495 boolean realSizeChanged; 496 boolean reportDrawNeeded; 497 498 int relayoutResult; 499 500 mSurfaceLock.lock(); 501 try { 502 mUpdateWindowNeeded = false; 503 reportDrawNeeded = mReportDrawNeeded; 504 mReportDrawNeeded = false; 505 mDrawingStopped = !visible; 506 507 if (DEBUG) Log.i(TAG, "Cur surface: " + mSurface); 508 509 relayoutResult = mSession.relayout( 510 mWindow, mWindow.mSeq, mLayout, mWidth, mHeight, 511 visible ? VISIBLE : GONE, 512 WindowManagerGlobal.RELAYOUT_DEFER_SURFACE_DESTROY, 513 mWinFrame, mOverscanInsets, mContentInsets, 514 mVisibleInsets, mConfiguration, mNewSurface); 515 if ((relayoutResult & WindowManagerGlobal.RELAYOUT_RES_FIRST_TIME) != 0) { 516 mReportDrawNeeded = true; 517 } 518 519 if (DEBUG) Log.i(TAG, "New surface: " + mNewSurface 520 + ", vis=" + visible + ", frame=" + mWinFrame); 521 522 mSurfaceFrame.left = 0; 523 mSurfaceFrame.top = 0; 524 if (mTranslator == null) { 525 mSurfaceFrame.right = mWinFrame.width(); 526 mSurfaceFrame.bottom = mWinFrame.height(); 527 } else { 528 float appInvertedScale = mTranslator.applicationInvertedScale; 529 mSurfaceFrame.right = (int) (mWinFrame.width() * appInvertedScale + 0.5f); 530 mSurfaceFrame.bottom = (int) (mWinFrame.height() * appInvertedScale + 0.5f); 531 } 532 533 final int surfaceWidth = mSurfaceFrame.right; 534 final int surfaceHeight = mSurfaceFrame.bottom; 535 realSizeChanged = mLastSurfaceWidth != surfaceWidth 536 || mLastSurfaceHeight != surfaceHeight; 537 mLastSurfaceWidth = surfaceWidth; 538 mLastSurfaceHeight = surfaceHeight; 539 } finally { 540 mSurfaceLock.unlock(); 541 } 542 543 try { 544 redrawNeeded |= creating | reportDrawNeeded; 545 546 SurfaceHolder.Callback callbacks[] = null; 547 548 final boolean surfaceChanged = (relayoutResult 549 & WindowManagerGlobal.RELAYOUT_RES_SURFACE_CHANGED) != 0; 550 if (mSurfaceCreated && (surfaceChanged || (!visible && visibleChanged))) { 551 mSurfaceCreated = false; 552 if (mSurface.isValid()) { 553 if (DEBUG) Log.i(TAG, "visibleChanged -- surfaceDestroyed"); 554 callbacks = getSurfaceCallbacks(); 555 for (SurfaceHolder.Callback c : callbacks) { 556 c.surfaceDestroyed(mSurfaceHolder); 557 } 558 } 559 } 560 561 mSurface.transferFrom(mNewSurface); 562 563 if (visible && mSurface.isValid()) { 564 if (!mSurfaceCreated && (surfaceChanged || visibleChanged)) { 565 mSurfaceCreated = true; 566 mIsCreating = true; 567 if (DEBUG) Log.i(TAG, "visibleChanged -- surfaceCreated"); 568 if (callbacks == null) { 569 callbacks = getSurfaceCallbacks(); 570 } 571 for (SurfaceHolder.Callback c : callbacks) { 572 c.surfaceCreated(mSurfaceHolder); 573 } 574 } 575 if (creating || formatChanged || sizeChanged 576 || visibleChanged || realSizeChanged) { 577 if (DEBUG) Log.i(TAG, "surfaceChanged -- format=" + mFormat 578 + " w=" + myWidth + " h=" + myHeight); 579 if (callbacks == null) { 580 callbacks = getSurfaceCallbacks(); 581 } 582 for (SurfaceHolder.Callback c : callbacks) { 583 c.surfaceChanged(mSurfaceHolder, mFormat, myWidth, myHeight); 584 } 585 } 586 if (redrawNeeded) { 587 if (DEBUG) Log.i(TAG, "surfaceRedrawNeeded"); 588 if (callbacks == null) { 589 callbacks = getSurfaceCallbacks(); 590 } 591 for (SurfaceHolder.Callback c : callbacks) { 592 if (c instanceof SurfaceHolder.Callback2) { 593 ((SurfaceHolder.Callback2)c).surfaceRedrawNeeded( 594 mSurfaceHolder); 595 } 596 } 597 } 598 } 599 } finally { 600 mIsCreating = false; 601 if (redrawNeeded) { 602 if (DEBUG) Log.i(TAG, "finishedDrawing"); 603 mSession.finishDrawing(mWindow); 604 } 605 mSession.performDeferredDestroy(mWindow); 606 } 607 } catch (RemoteException ex) { 608 } 609 if (DEBUG) Log.v( 610 TAG, "Layout: x=" + mLayout.x + " y=" + mLayout.y + 611 " w=" + mLayout.width + " h=" + mLayout.height + 612 ", frame=" + mSurfaceFrame); 613 } 614 } 615 616 private SurfaceHolder.Callback[] getSurfaceCallbacks() { 617 SurfaceHolder.Callback callbacks[]; 618 synchronized (mCallbacks) { 619 callbacks = new SurfaceHolder.Callback[mCallbacks.size()]; 620 mCallbacks.toArray(callbacks); 621 } 622 return callbacks; 623 } 624 625 void handleGetNewSurface() { 626 updateWindow(false, false); 627 } 628 629 /** 630 * Check to see if the surface has fixed size dimensions or if the surface's 631 * dimensions are dimensions are dependent on its current layout. 632 * 633 * @return true if the surface has dimensions that are fixed in size 634 * @hide 635 */ 636 public boolean isFixedSize() { 637 return (mRequestedWidth != -1 || mRequestedHeight != -1); 638 } 639 640 private static class MyWindow extends BaseIWindow { 641 private final WeakReference<SurfaceView> mSurfaceView; 642 643 public MyWindow(SurfaceView surfaceView) { 644 mSurfaceView = new WeakReference<SurfaceView>(surfaceView); 645 } 646 647 @Override 648 public void resized(Rect frame, Rect overscanInsets, Rect contentInsets, 649 Rect visibleInsets, boolean reportDraw, Configuration newConfig) { 650 SurfaceView surfaceView = mSurfaceView.get(); 651 if (surfaceView != null) { 652 if (DEBUG) Log.v( 653 "SurfaceView", surfaceView + " got resized: w=" + frame.width() 654 + " h=" + frame.height() + ", cur w=" + mCurWidth + " h=" + mCurHeight); 655 surfaceView.mSurfaceLock.lock(); 656 try { 657 if (reportDraw) { 658 surfaceView.mUpdateWindowNeeded = true; 659 surfaceView.mReportDrawNeeded = true; 660 surfaceView.mHandler.sendEmptyMessage(UPDATE_WINDOW_MSG); 661 } else if (surfaceView.mWinFrame.width() != frame.width() 662 || surfaceView.mWinFrame.height() != frame.height()) { 663 surfaceView.mUpdateWindowNeeded = true; 664 surfaceView.mHandler.sendEmptyMessage(UPDATE_WINDOW_MSG); 665 } 666 } finally { 667 surfaceView.mSurfaceLock.unlock(); 668 } 669 } 670 } 671 672 @Override 673 public void dispatchAppVisibility(boolean visible) { 674 // The point of SurfaceView is to let the app control the surface. 675 } 676 677 @Override 678 public void dispatchGetNewSurface() { 679 SurfaceView surfaceView = mSurfaceView.get(); 680 if (surfaceView != null) { 681 Message msg = surfaceView.mHandler.obtainMessage(GET_NEW_SURFACE_MSG); 682 surfaceView.mHandler.sendMessage(msg); 683 } 684 } 685 686 @Override 687 public void windowFocusChanged(boolean hasFocus, boolean touchEnabled) { 688 Log.w("SurfaceView", "Unexpected focus in surface: focus=" + hasFocus + ", touchEnabled=" + touchEnabled); 689 } 690 691 @Override 692 public void executeCommand(String command, String parameters, ParcelFileDescriptor out) { 693 } 694 695 int mCurWidth = -1; 696 int mCurHeight = -1; 697 } 698 699 private final SurfaceHolder mSurfaceHolder = new SurfaceHolder() { 700 701 private static final String LOG_TAG = "SurfaceHolder"; 702 703 @Override 704 public boolean isCreating() { 705 return mIsCreating; 706 } 707 708 @Override 709 public void addCallback(Callback callback) { 710 synchronized (mCallbacks) { 711 // This is a linear search, but in practice we'll 712 // have only a couple callbacks, so it doesn't matter. 713 if (mCallbacks.contains(callback) == false) { 714 mCallbacks.add(callback); 715 } 716 } 717 } 718 719 @Override 720 public void removeCallback(Callback callback) { 721 synchronized (mCallbacks) { 722 mCallbacks.remove(callback); 723 } 724 } 725 726 @Override 727 public void setFixedSize(int width, int height) { 728 if (mRequestedWidth != width || mRequestedHeight != height) { 729 mRequestedWidth = width; 730 mRequestedHeight = height; 731 requestLayout(); 732 } 733 } 734 735 @Override 736 public void setSizeFromLayout() { 737 if (mRequestedWidth != -1 || mRequestedHeight != -1) { 738 mRequestedWidth = mRequestedHeight = -1; 739 requestLayout(); 740 } 741 } 742 743 @Override 744 public void setFormat(int format) { 745 746 // for backward compatibility reason, OPAQUE always 747 // means 565 for SurfaceView 748 if (format == PixelFormat.OPAQUE) 749 format = PixelFormat.RGB_565; 750 751 mRequestedFormat = format; 752 if (mWindow != null) { 753 updateWindow(false, false); 754 } 755 } 756 757 /** 758 * @deprecated setType is now ignored. 759 */ 760 @Override 761 @Deprecated 762 public void setType(int type) { } 763 764 @Override 765 public void setKeepScreenOn(boolean screenOn) { 766 Message msg = mHandler.obtainMessage(KEEP_SCREEN_ON_MSG); 767 msg.arg1 = screenOn ? 1 : 0; 768 mHandler.sendMessage(msg); 769 } 770 771 /** 772 * Gets a {@link Canvas} for drawing into the SurfaceView's Surface 773 * 774 * After drawing into the provided {@link Canvas}, the caller must 775 * invoke {@link #unlockCanvasAndPost} to post the new contents to the surface. 776 * 777 * The caller must redraw the entire surface. 778 * @return A canvas for drawing into the surface. 779 */ 780 @Override 781 public Canvas lockCanvas() { 782 return internalLockCanvas(null); 783 } 784 785 /** 786 * Gets a {@link Canvas} for drawing into the SurfaceView's Surface 787 * 788 * After drawing into the provided {@link Canvas}, the caller must 789 * invoke {@link #unlockCanvasAndPost} to post the new contents to the surface. 790 * 791 * @param inOutDirty A rectangle that represents the dirty region that the caller wants 792 * to redraw. This function may choose to expand the dirty rectangle if for example 793 * the surface has been resized or if the previous contents of the surface were 794 * not available. The caller must redraw the entire dirty region as represented 795 * by the contents of the inOutDirty rectangle upon return from this function. 796 * The caller may also pass <code>null</code> instead, in the case where the 797 * entire surface should be redrawn. 798 * @return A canvas for drawing into the surface. 799 */ 800 @Override 801 public Canvas lockCanvas(Rect inOutDirty) { 802 return internalLockCanvas(inOutDirty); 803 } 804 805 private final Canvas internalLockCanvas(Rect dirty) { 806 mSurfaceLock.lock(); 807 808 if (DEBUG) Log.i(TAG, "Locking canvas... stopped=" 809 + mDrawingStopped + ", win=" + mWindow); 810 811 Canvas c = null; 812 if (!mDrawingStopped && mWindow != null) { 813 try { 814 c = mSurface.lockCanvas(dirty); 815 } catch (Exception e) { 816 Log.e(LOG_TAG, "Exception locking surface", e); 817 } 818 } 819 820 if (DEBUG) Log.i(TAG, "Returned canvas: " + c); 821 if (c != null) { 822 mLastLockTime = SystemClock.uptimeMillis(); 823 return c; 824 } 825 826 // If the Surface is not ready to be drawn, then return null, 827 // but throttle calls to this function so it isn't called more 828 // than every 100ms. 829 long now = SystemClock.uptimeMillis(); 830 long nextTime = mLastLockTime + 100; 831 if (nextTime > now) { 832 try { 833 Thread.sleep(nextTime-now); 834 } catch (InterruptedException e) { 835 } 836 now = SystemClock.uptimeMillis(); 837 } 838 mLastLockTime = now; 839 mSurfaceLock.unlock(); 840 841 return null; 842 } 843 844 /** 845 * Posts the new contents of the {@link Canvas} to the surface and 846 * releases the {@link Canvas}. 847 * 848 * @param canvas The canvas previously obtained from {@link #lockCanvas}. 849 */ 850 @Override 851 public void unlockCanvasAndPost(Canvas canvas) { 852 mSurface.unlockCanvasAndPost(canvas); 853 mSurfaceLock.unlock(); 854 } 855 856 @Override 857 public Surface getSurface() { 858 return mSurface; 859 } 860 861 @Override 862 public Rect getSurfaceFrame() { 863 return mSurfaceFrame; 864 } 865 }; 866 } 867
