SurfaceView.java revision c9f345ff7bc59916d5168d49d9312b2ff7a07daa
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 17package android.view; 18 19import com.android.internal.view.BaseIWindow; 20 21import android.content.Context; 22import android.content.res.Configuration; 23import android.content.res.CompatibilityInfo.Translator; 24import android.graphics.Canvas; 25import android.graphics.PixelFormat; 26import android.graphics.PorterDuff; 27import android.graphics.Rect; 28import android.graphics.Region; 29import android.os.Handler; 30import android.os.Message; 31import android.os.RemoteException; 32import android.os.SystemClock; 33import android.os.ParcelFileDescriptor; 34import android.util.AttributeSet; 35import android.util.Log; 36 37import java.lang.ref.WeakReference; 38import java.util.ArrayList; 39import 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 */ 86public 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 mContentInsets = new Rect(); 107 final Configuration mConfiguration = new Configuration(); 108 109 static final int KEEP_SCREEN_ON_MSG = 1; 110 static final int GET_NEW_SURFACE_MSG = 2; 111 static final int UPDATE_WINDOW_MSG = 3; 112 113 int mWindowType = WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA; 114 115 boolean mIsCreating = false; 116 117 final Handler mHandler = new Handler() { 118 @Override 119 public void handleMessage(Message msg) { 120 switch (msg.what) { 121 case KEEP_SCREEN_ON_MSG: { 122 setKeepScreenOn(msg.arg1 != 0); 123 } break; 124 case GET_NEW_SURFACE_MSG: { 125 handleGetNewSurface(); 126 } break; 127 case UPDATE_WINDOW_MSG: { 128 updateWindow(false, false); 129 } break; 130 } 131 } 132 }; 133 134 final ViewTreeObserver.OnScrollChangedListener mScrollChangedListener 135 = new ViewTreeObserver.OnScrollChangedListener() { 136 public void onScrollChanged() { 137 updateWindow(false, false); 138 } 139 }; 140 141 boolean mRequestedVisible = false; 142 boolean mWindowVisibility = false; 143 boolean mViewVisibility = false; 144 int mRequestedWidth = -1; 145 int mRequestedHeight = -1; 146 /* Set SurfaceView's format to 565 by default to maintain backward 147 * compatibility with applications assuming this format. 148 */ 149 int mRequestedFormat = PixelFormat.RGB_565; 150 151 boolean mHaveFrame = false; 152 boolean mSurfaceCreated = false; 153 long mLastLockTime = 0; 154 155 boolean mVisible = false; 156 int mLeft = -1; 157 int mTop = -1; 158 int mWidth = -1; 159 int mHeight = -1; 160 int mFormat = -1; 161 final Rect mSurfaceFrame = new Rect(); 162 Rect mTmpDirty; 163 int mLastSurfaceWidth = -1, mLastSurfaceHeight = -1; 164 boolean mUpdateWindowNeeded; 165 boolean mReportDrawNeeded; 166 private Translator mTranslator; 167 168 private final ViewTreeObserver.OnPreDrawListener mDrawListener = 169 new ViewTreeObserver.OnPreDrawListener() { 170 @Override 171 public boolean onPreDraw() { 172 // reposition ourselves where the surface is 173 mHaveFrame = getWidth() > 0 && getHeight() > 0; 174 updateWindow(false, false); 175 return true; 176 } 177 }; 178 private boolean mGlobalListenersAdded; 179 180 public SurfaceView(Context context) { 181 super(context); 182 init(); 183 } 184 185 public SurfaceView(Context context, AttributeSet attrs) { 186 super(context, attrs); 187 init(); 188 } 189 190 public SurfaceView(Context context, AttributeSet attrs, int defStyle) { 191 super(context, attrs, defStyle); 192 init(); 193 } 194 195 private void init() { 196 setWillNotDraw(true); 197 } 198 199 /** 200 * Return the SurfaceHolder providing access and control over this 201 * SurfaceView's underlying surface. 202 * 203 * @return SurfaceHolder The holder of the surface. 204 */ 205 public SurfaceHolder getHolder() { 206 return mSurfaceHolder; 207 } 208 209 @Override 210 protected void onAttachedToWindow() { 211 super.onAttachedToWindow(); 212 mParent.requestTransparentRegion(this); 213 mSession = getWindowSession(); 214 mLayout.token = getWindowToken(); 215 mLayout.setTitle("SurfaceView"); 216 mViewVisibility = getVisibility() == VISIBLE; 217 218 if (!mGlobalListenersAdded) { 219 ViewTreeObserver observer = getViewTreeObserver(); 220 observer.addOnScrollChangedListener(mScrollChangedListener); 221 observer.addOnPreDrawListener(mDrawListener); 222 mGlobalListenersAdded = true; 223 } 224 } 225 226 @Override 227 protected void onWindowVisibilityChanged(int visibility) { 228 super.onWindowVisibilityChanged(visibility); 229 mWindowVisibility = visibility == VISIBLE; 230 mRequestedVisible = mWindowVisibility && mViewVisibility; 231 updateWindow(false, false); 232 } 233 234 @Override 235 public void setVisibility(int visibility) { 236 super.setVisibility(visibility); 237 mViewVisibility = visibility == VISIBLE; 238 boolean newRequestedVisible = mWindowVisibility && mViewVisibility; 239 if (newRequestedVisible != mRequestedVisible) { 240 // our base class (View) invalidates the layout only when 241 // we go from/to the GONE state. However, SurfaceView needs 242 // to request a re-layout when the visibility changes at all. 243 // This is needed because the transparent region is computed 244 // as part of the layout phase, and it changes (obviously) when 245 // the visibility changes. 246 requestLayout(); 247 } 248 mRequestedVisible = newRequestedVisible; 249 updateWindow(false, false); 250 } 251 252 @Override 253 protected void onDetachedFromWindow() { 254 if (mGlobalListenersAdded) { 255 ViewTreeObserver observer = getViewTreeObserver(); 256 observer.removeOnScrollChangedListener(mScrollChangedListener); 257 observer.removeOnPreDrawListener(mDrawListener); 258 mGlobalListenersAdded = false; 259 } 260 261 mRequestedVisible = false; 262 updateWindow(false, false); 263 mHaveFrame = false; 264 if (mWindow != null) { 265 try { 266 mSession.remove(mWindow); 267 } catch (RemoteException ex) { 268 // Not much we can do here... 269 } 270 mWindow = null; 271 } 272 mSession = null; 273 mLayout.token = null; 274 275 super.onDetachedFromWindow(); 276 } 277 278 @Override 279 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 280 int width = mRequestedWidth >= 0 281 ? resolveSizeAndState(mRequestedWidth, widthMeasureSpec, 0) 282 : getDefaultSize(0, widthMeasureSpec); 283 int height = mRequestedHeight >= 0 284 ? resolveSizeAndState(mRequestedHeight, heightMeasureSpec, 0) 285 : getDefaultSize(0, heightMeasureSpec); 286 setMeasuredDimension(width, height); 287 } 288 289 /** @hide */ 290 @Override 291 protected boolean setFrame(int left, int top, int right, int bottom) { 292 boolean result = super.setFrame(left, top, right, bottom); 293 updateWindow(false, false); 294 return result; 295 } 296 297 @Override 298 public boolean gatherTransparentRegion(Region region) { 299 if (mWindowType == WindowManager.LayoutParams.TYPE_APPLICATION_PANEL) { 300 return super.gatherTransparentRegion(region); 301 } 302 303 boolean opaque = true; 304 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == 0) { 305 // this view draws, remove it from the transparent region 306 opaque = super.gatherTransparentRegion(region); 307 } else if (region != null) { 308 int w = getWidth(); 309 int h = getHeight(); 310 if (w>0 && h>0) { 311 getLocationInWindow(mLocation); 312 // otherwise, punch a hole in the whole hierarchy 313 int l = mLocation[0]; 314 int t = mLocation[1]; 315 region.op(l, t, l+w, t+h, Region.Op.UNION); 316 } 317 } 318 if (PixelFormat.formatHasAlpha(mRequestedFormat)) { 319 opaque = false; 320 } 321 return opaque; 322 } 323 324 @Override 325 public void draw(Canvas canvas) { 326 if (mWindowType != WindowManager.LayoutParams.TYPE_APPLICATION_PANEL) { 327 // draw() is not called when SKIP_DRAW is set 328 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == 0) { 329 // punch a whole in the view-hierarchy below us 330 canvas.drawColor(0, PorterDuff.Mode.CLEAR); 331 } 332 } 333 super.draw(canvas); 334 } 335 336 @Override 337 protected void dispatchDraw(Canvas canvas) { 338 if (mWindowType != WindowManager.LayoutParams.TYPE_APPLICATION_PANEL) { 339 // if SKIP_DRAW is cleared, draw() has already punched a hole 340 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 341 // punch a whole in the view-hierarchy below us 342 canvas.drawColor(0, PorterDuff.Mode.CLEAR); 343 } 344 } 345 super.dispatchDraw(canvas); 346 } 347 348 /** 349 * Control whether the surface view's surface is placed on top of another 350 * regular surface view in the window (but still behind the window itself). 351 * This is typically used to place overlays on top of an underlying media 352 * surface view. 353 * 354 * <p>Note that this must be set before the surface view's containing 355 * window is attached to the window manager. 356 * 357 * <p>Calling this overrides any previous call to {@link #setZOrderOnTop}. 358 */ 359 public void setZOrderMediaOverlay(boolean isMediaOverlay) { 360 mWindowType = isMediaOverlay 361 ? WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA_OVERLAY 362 : WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA; 363 } 364 365 /** 366 * Control whether the surface view's surface is placed on top of its 367 * window. Normally it is placed behind the window, to allow it to 368 * (for the most part) appear to composite with the views in the 369 * hierarchy. By setting this, you cause it to be placed above the 370 * window. This means that none of the contents of the window this 371 * SurfaceView is in will be visible on top of its surface. 372 * 373 * <p>Note that this must be set before the surface view's containing 374 * window is attached to the window manager. 375 * 376 * <p>Calling this overrides any previous call to {@link #setZOrderMediaOverlay}. 377 */ 378 public void setZOrderOnTop(boolean onTop) { 379 if (onTop) { 380 mWindowType = WindowManager.LayoutParams.TYPE_APPLICATION_PANEL; 381 // ensures the surface is placed below the IME 382 mLayout.flags |= WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM; 383 } else { 384 mWindowType = WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA; 385 mLayout.flags &= ~WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM; 386 } 387 } 388 389 /** 390 * Hack to allow special layering of windows. The type is one of the 391 * types in WindowManager.LayoutParams. This is a hack so: 392 * @hide 393 */ 394 public void setWindowType(int type) { 395 mWindowType = type; 396 } 397 398 private void updateWindow(boolean force, boolean redrawNeeded) { 399 if (!mHaveFrame) { 400 return; 401 } 402 ViewRootImpl viewRoot = getViewRootImpl(); 403 if (viewRoot != null) { 404 mTranslator = viewRoot.mTranslator; 405 } 406 407 if (mTranslator != null) { 408 mSurface.setCompatibilityTranslator(mTranslator); 409 } 410 411 int myWidth = mRequestedWidth; 412 if (myWidth <= 0) myWidth = getWidth(); 413 int myHeight = mRequestedHeight; 414 if (myHeight <= 0) myHeight = getHeight(); 415 416 getLocationInWindow(mLocation); 417 final boolean creating = mWindow == null; 418 final boolean formatChanged = mFormat != mRequestedFormat; 419 final boolean sizeChanged = mWidth != myWidth || mHeight != myHeight; 420 final boolean visibleChanged = mVisible != mRequestedVisible; 421 422 if (force || creating || formatChanged || sizeChanged || visibleChanged 423 || mLeft != mLocation[0] || mTop != mLocation[1] 424 || mUpdateWindowNeeded || mReportDrawNeeded || redrawNeeded) { 425 426 if (DEBUG) Log.i(TAG, "Changes: creating=" + creating 427 + " format=" + formatChanged + " size=" + sizeChanged 428 + " visible=" + visibleChanged 429 + " left=" + (mLeft != mLocation[0]) 430 + " top=" + (mTop != mLocation[1])); 431 432 try { 433 final boolean visible = mVisible = mRequestedVisible; 434 mLeft = mLocation[0]; 435 mTop = mLocation[1]; 436 mWidth = myWidth; 437 mHeight = myHeight; 438 mFormat = mRequestedFormat; 439 440 // Scaling/Translate window's layout here because mLayout is not used elsewhere. 441 442 // Places the window relative 443 mLayout.x = mLeft; 444 mLayout.y = mTop; 445 mLayout.width = getWidth(); 446 mLayout.height = getHeight(); 447 if (mTranslator != null) { 448 mTranslator.translateLayoutParamsInAppWindowToScreen(mLayout); 449 } 450 451 mLayout.format = mRequestedFormat; 452 mLayout.flags |=WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE 453 | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE 454 | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS 455 | WindowManager.LayoutParams.FLAG_SCALED 456 | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE 457 | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE 458 ; 459 if (!getContext().getResources().getCompatibilityInfo().supportsScreen()) { 460 mLayout.flags |= WindowManager.LayoutParams.FLAG_COMPATIBLE_WINDOW; 461 } 462 463 if (mWindow == null) { 464 Display display = getDisplay(); 465 mWindow = new MyWindow(this); 466 mLayout.type = mWindowType; 467 mLayout.gravity = Gravity.START|Gravity.TOP; 468 mSession.addToDisplayWithoutInputChannel(mWindow, mWindow.mSeq, mLayout, 469 mVisible ? VISIBLE : GONE, display.getDisplayId(), mContentInsets); 470 } 471 472 boolean realSizeChanged; 473 boolean reportDrawNeeded; 474 475 int relayoutResult; 476 477 mSurfaceLock.lock(); 478 try { 479 mUpdateWindowNeeded = false; 480 reportDrawNeeded = mReportDrawNeeded; 481 mReportDrawNeeded = false; 482 mDrawingStopped = !visible; 483 484 if (DEBUG) Log.i(TAG, "Cur surface: " + mSurface); 485 486 relayoutResult = mSession.relayout( 487 mWindow, mWindow.mSeq, mLayout, mWidth, mHeight, 488 visible ? VISIBLE : GONE, 489 WindowManagerGlobal.RELAYOUT_DEFER_SURFACE_DESTROY, 490 mWinFrame, mContentInsets, 491 mVisibleInsets, mConfiguration, mNewSurface); 492 if ((relayoutResult & WindowManagerGlobal.RELAYOUT_RES_FIRST_TIME) != 0) { 493 mReportDrawNeeded = true; 494 } 495 496 if (DEBUG) Log.i(TAG, "New surface: " + mNewSurface 497 + ", vis=" + visible + ", frame=" + mWinFrame); 498 499 mSurfaceFrame.left = 0; 500 mSurfaceFrame.top = 0; 501 if (mTranslator == null) { 502 mSurfaceFrame.right = mWinFrame.width(); 503 mSurfaceFrame.bottom = mWinFrame.height(); 504 } else { 505 float appInvertedScale = mTranslator.applicationInvertedScale; 506 mSurfaceFrame.right = (int) (mWinFrame.width() * appInvertedScale + 0.5f); 507 mSurfaceFrame.bottom = (int) (mWinFrame.height() * appInvertedScale + 0.5f); 508 } 509 510 final int surfaceWidth = mSurfaceFrame.right; 511 final int surfaceHeight = mSurfaceFrame.bottom; 512 realSizeChanged = mLastSurfaceWidth != surfaceWidth 513 || mLastSurfaceHeight != surfaceHeight; 514 mLastSurfaceWidth = surfaceWidth; 515 mLastSurfaceHeight = surfaceHeight; 516 } finally { 517 mSurfaceLock.unlock(); 518 } 519 520 try { 521 redrawNeeded |= creating | reportDrawNeeded; 522 523 SurfaceHolder.Callback callbacks[] = null; 524 525 final boolean surfaceChanged = (relayoutResult 526 & WindowManagerGlobal.RELAYOUT_RES_SURFACE_CHANGED) != 0; 527 if (mSurfaceCreated && (surfaceChanged || (!visible && visibleChanged))) { 528 mSurfaceCreated = false; 529 if (mSurface.isValid()) { 530 if (DEBUG) Log.i(TAG, "visibleChanged -- surfaceDestroyed"); 531 callbacks = getSurfaceCallbacks(); 532 for (SurfaceHolder.Callback c : callbacks) { 533 c.surfaceDestroyed(mSurfaceHolder); 534 } 535 } 536 } 537 538 mSurface.transferFrom(mNewSurface); 539 540 if (visible && mSurface.isValid()) { 541 if (!mSurfaceCreated && (surfaceChanged || visibleChanged)) { 542 mSurfaceCreated = true; 543 mIsCreating = true; 544 if (DEBUG) Log.i(TAG, "visibleChanged -- surfaceCreated"); 545 if (callbacks == null) { 546 callbacks = getSurfaceCallbacks(); 547 } 548 for (SurfaceHolder.Callback c : callbacks) { 549 c.surfaceCreated(mSurfaceHolder); 550 } 551 } 552 if (creating || formatChanged || sizeChanged 553 || visibleChanged || realSizeChanged) { 554 if (DEBUG) Log.i(TAG, "surfaceChanged -- format=" + mFormat 555 + " w=" + myWidth + " h=" + myHeight); 556 if (callbacks == null) { 557 callbacks = getSurfaceCallbacks(); 558 } 559 for (SurfaceHolder.Callback c : callbacks) { 560 c.surfaceChanged(mSurfaceHolder, mFormat, myWidth, myHeight); 561 } 562 } 563 if (redrawNeeded) { 564 if (DEBUG) Log.i(TAG, "surfaceRedrawNeeded"); 565 if (callbacks == null) { 566 callbacks = getSurfaceCallbacks(); 567 } 568 for (SurfaceHolder.Callback c : callbacks) { 569 if (c instanceof SurfaceHolder.Callback2) { 570 ((SurfaceHolder.Callback2)c).surfaceRedrawNeeded( 571 mSurfaceHolder); 572 } 573 } 574 } 575 } 576 } finally { 577 mIsCreating = false; 578 if (redrawNeeded) { 579 if (DEBUG) Log.i(TAG, "finishedDrawing"); 580 mSession.finishDrawing(mWindow); 581 } 582 mSession.performDeferredDestroy(mWindow); 583 } 584 } catch (RemoteException ex) { 585 } 586 if (DEBUG) Log.v( 587 TAG, "Layout: x=" + mLayout.x + " y=" + mLayout.y + 588 " w=" + mLayout.width + " h=" + mLayout.height + 589 ", frame=" + mSurfaceFrame); 590 } 591 } 592 593 private SurfaceHolder.Callback[] getSurfaceCallbacks() { 594 SurfaceHolder.Callback callbacks[]; 595 synchronized (mCallbacks) { 596 callbacks = new SurfaceHolder.Callback[mCallbacks.size()]; 597 mCallbacks.toArray(callbacks); 598 } 599 return callbacks; 600 } 601 602 void handleGetNewSurface() { 603 updateWindow(false, false); 604 } 605 606 /** 607 * Check to see if the surface has fixed size dimensions or if the surface's 608 * dimensions are dimensions are dependent on its current layout. 609 * 610 * @return true if the surface has dimensions that are fixed in size 611 * @hide 612 */ 613 public boolean isFixedSize() { 614 return (mRequestedWidth != -1 || mRequestedHeight != -1); 615 } 616 617 private static class MyWindow extends BaseIWindow { 618 private final WeakReference<SurfaceView> mSurfaceView; 619 620 public MyWindow(SurfaceView surfaceView) { 621 mSurfaceView = new WeakReference<SurfaceView>(surfaceView); 622 } 623 624 @Override 625 public void resized(Rect frame, Rect contentInsets, 626 Rect visibleInsets, boolean reportDraw, Configuration newConfig) { 627 SurfaceView surfaceView = mSurfaceView.get(); 628 if (surfaceView != null) { 629 if (DEBUG) Log.v( 630 "SurfaceView", surfaceView + " got resized: w=" + frame.width() 631 + " h=" + frame.height() + ", cur w=" + mCurWidth + " h=" + mCurHeight); 632 surfaceView.mSurfaceLock.lock(); 633 try { 634 if (reportDraw) { 635 surfaceView.mUpdateWindowNeeded = true; 636 surfaceView.mReportDrawNeeded = true; 637 surfaceView.mHandler.sendEmptyMessage(UPDATE_WINDOW_MSG); 638 } else if (surfaceView.mWinFrame.width() != frame.width() 639 || surfaceView.mWinFrame.height() != frame.height()) { 640 surfaceView.mUpdateWindowNeeded = true; 641 surfaceView.mHandler.sendEmptyMessage(UPDATE_WINDOW_MSG); 642 } 643 } finally { 644 surfaceView.mSurfaceLock.unlock(); 645 } 646 } 647 } 648 649 public void dispatchAppVisibility(boolean visible) { 650 // The point of SurfaceView is to let the app control the surface. 651 } 652 653 public void dispatchGetNewSurface() { 654 SurfaceView surfaceView = mSurfaceView.get(); 655 if (surfaceView != null) { 656 Message msg = surfaceView.mHandler.obtainMessage(GET_NEW_SURFACE_MSG); 657 surfaceView.mHandler.sendMessage(msg); 658 } 659 } 660 661 public void windowFocusChanged(boolean hasFocus, boolean touchEnabled) { 662 Log.w("SurfaceView", "Unexpected focus in surface: focus=" + hasFocus + ", touchEnabled=" + touchEnabled); 663 } 664 665 public void executeCommand(String command, String parameters, ParcelFileDescriptor out) { 666 } 667 668 int mCurWidth = -1; 669 int mCurHeight = -1; 670 } 671 672 private SurfaceHolder mSurfaceHolder = new SurfaceHolder() { 673 674 private static final String LOG_TAG = "SurfaceHolder"; 675 676 public boolean isCreating() { 677 return mIsCreating; 678 } 679 680 public void addCallback(Callback callback) { 681 synchronized (mCallbacks) { 682 // This is a linear search, but in practice we'll 683 // have only a couple callbacks, so it doesn't matter. 684 if (mCallbacks.contains(callback) == false) { 685 mCallbacks.add(callback); 686 } 687 } 688 } 689 690 public void removeCallback(Callback callback) { 691 synchronized (mCallbacks) { 692 mCallbacks.remove(callback); 693 } 694 } 695 696 public void setFixedSize(int width, int height) { 697 if (mRequestedWidth != width || mRequestedHeight != height) { 698 mRequestedWidth = width; 699 mRequestedHeight = height; 700 requestLayout(); 701 } 702 } 703 704 public void setSizeFromLayout() { 705 if (mRequestedWidth != -1 || mRequestedHeight != -1) { 706 mRequestedWidth = mRequestedHeight = -1; 707 requestLayout(); 708 } 709 } 710 711 public void setFormat(int format) { 712 713 // for backward compatibility reason, OPAQUE always 714 // means 565 for SurfaceView 715 if (format == PixelFormat.OPAQUE) 716 format = PixelFormat.RGB_565; 717 718 mRequestedFormat = format; 719 if (mWindow != null) { 720 updateWindow(false, false); 721 } 722 } 723 724 /** 725 * @deprecated setType is now ignored. 726 */ 727 @Deprecated 728 public void setType(int type) { } 729 730 public void setKeepScreenOn(boolean screenOn) { 731 Message msg = mHandler.obtainMessage(KEEP_SCREEN_ON_MSG); 732 msg.arg1 = screenOn ? 1 : 0; 733 mHandler.sendMessage(msg); 734 } 735 736 public Canvas lockCanvas() { 737 return internalLockCanvas(null); 738 } 739 740 public Canvas lockCanvas(Rect dirty) { 741 return internalLockCanvas(dirty); 742 } 743 744 private final Canvas internalLockCanvas(Rect dirty) { 745 mSurfaceLock.lock(); 746 747 if (DEBUG) Log.i(TAG, "Locking canvas... stopped=" 748 + mDrawingStopped + ", win=" + mWindow); 749 750 Canvas c = null; 751 if (!mDrawingStopped && mWindow != null) { 752 if (dirty == null) { 753 if (mTmpDirty == null) { 754 mTmpDirty = new Rect(); 755 } 756 mTmpDirty.set(mSurfaceFrame); 757 dirty = mTmpDirty; 758 } 759 760 try { 761 c = mSurface.lockCanvas(dirty); 762 } catch (Exception e) { 763 Log.e(LOG_TAG, "Exception locking surface", e); 764 } 765 } 766 767 if (DEBUG) Log.i(TAG, "Returned canvas: " + c); 768 if (c != null) { 769 mLastLockTime = SystemClock.uptimeMillis(); 770 return c; 771 } 772 773 // If the Surface is not ready to be drawn, then return null, 774 // but throttle calls to this function so it isn't called more 775 // than every 100ms. 776 long now = SystemClock.uptimeMillis(); 777 long nextTime = mLastLockTime + 100; 778 if (nextTime > now) { 779 try { 780 Thread.sleep(nextTime-now); 781 } catch (InterruptedException e) { 782 } 783 now = SystemClock.uptimeMillis(); 784 } 785 mLastLockTime = now; 786 mSurfaceLock.unlock(); 787 788 return null; 789 } 790 791 public void unlockCanvasAndPost(Canvas canvas) { 792 mSurface.unlockCanvasAndPost(canvas); 793 mSurfaceLock.unlock(); 794 } 795 796 public Surface getSurface() { 797 return mSurface; 798 } 799 800 public Rect getSurfaceFrame() { 801 return mSurfaceFrame; 802 } 803 }; 804} 805