TextureView.java revision c01391fb4eb0eef33d142e89e060eac7e75de39d
1aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy/* 2aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Copyright (C) 2011 The Android Open Source Project 3aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 4aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Licensed under the Apache License, Version 2.0 (the "License"); 5aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * you may not use this file except in compliance with the License. 6aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * You may obtain a copy of the License at 7aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 8aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * http://www.apache.org/licenses/LICENSE-2.0 9aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 10aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Unless required by applicable law or agreed to in writing, software 11aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * distributed under the License is distributed on an "AS IS" BASIS, 12aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * See the License for the specific language governing permissions and 14aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * limitations under the License. 15aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 16aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 17aa6c24c21c727a196451332448d4e3b11a80be69Romain Guypackage android.view; 18aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 19aa6c24c21c727a196451332448d4e3b11a80be69Romain Guyimport android.content.Context; 2077a811610f99e21da7f88dafef60d09f345d0506Romain Guyimport android.graphics.Bitmap; 21aa6c24c21c727a196451332448d4e3b11a80be69Romain Guyimport android.graphics.Canvas; 22302a9df1d50373c82923bb84ff665dfce584fb22Romain Guyimport android.graphics.Matrix; 23aa6c24c21c727a196451332448d4e3b11a80be69Romain Guyimport android.graphics.Paint; 246be3d5561cbeccf0a8257a4acb155657f868e548Romain Guyimport android.graphics.Rect; 25aa6c24c21c727a196451332448d4e3b11a80be69Romain Guyimport android.graphics.SurfaceTexture; 26aa6c24c21c727a196451332448d4e3b11a80be69Romain Guyimport android.util.AttributeSet; 27aa6c24c21c727a196451332448d4e3b11a80be69Romain Guyimport android.util.Log; 28aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 29aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy/** 30aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <p>A TextureView can be used to display a content stream. Such a content 31aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * stream can for instance be a video or an OpenGL scene. The content stream 32aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * can come from the application's process as well as a remote process.</p> 33aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 34aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <p>TextureView can only be used in a hardware accelerated window. When 35aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * rendered in software, TextureView will draw nothing.</p> 36aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 37aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <p>Unlike {@link SurfaceView}, TextureView does not create a separate 38aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * window but behaves as a regular View. This key difference allows a 39aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * TextureView to be moved, transformed, animated, etc. For instance, you 40aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * can make a TextureView semi-translucent by calling 41aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <code>myView.setAlpha(0.5f)</code>.</p> 42aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 43aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <p>Using a TextureView is simple: all you need to do is get its 44aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * {@link SurfaceTexture}. The {@link SurfaceTexture} can then be used to 45aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * render content. The following example demonstrates how to render the 46aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * camera preview into a TextureView:</p> 47aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 48aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <pre> 49aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * public class LiveCameraActivity extends Activity implements TextureView.SurfaceTextureListener { 50aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * private Camera mCamera; 51aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * private TextureView mTextureView; 52aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 53aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * protected void onCreate(Bundle savedInstanceState) { 54aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * super.onCreate(savedInstanceState); 55aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 56aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * mTextureView = new TextureView(this); 57aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * mTextureView.setSurfaceTextureListener(this); 58aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 59aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * setContentView(mTextureView); 60aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * } 61aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 62451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy * public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) { 63aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * mCamera = Camera.open(); 64aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 65aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * try { 66aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * mCamera.setPreviewTexture(surface); 67aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * mCamera.startPreview(); 68aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * } catch (IOException ioe) { 69aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * // Something bad happened 70aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * } 71aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * } 72cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba * 738f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) { 748f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * // Ignored, Camera does all the work for us 758f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * } 76cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba * 77402f05530352f34d5320c2d23be43c274d97c4e2Grace Kloba * public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) { 78451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy * mCamera.stopPreview(); 79451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy * mCamera.release(); 80402f05530352f34d5320c2d23be43c274d97c4e2Grace Kloba * return true; 81451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy * } 82cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba * 83cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba * public void onSurfaceTextureUpdated(SurfaceTexture surface) { 8458f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy * // Invoked every time there's a new Camera preview frame 85cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba * } 86aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * } 87aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * </pre> 88aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 89aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <p>A TextureView's SurfaceTexture can be obtained either by invoking 90aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * {@link #getSurfaceTexture()} or by using a {@link SurfaceTextureListener}. 91aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * It is important to know that a SurfaceTexture is available only after the 92aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * TextureView is attached to a window (and {@link #onAttachedToWindow()} has 93aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * been invoked.) It is therefore highly recommended you use a listener to 94aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * be notified when the SurfaceTexture becomes available.</p> 95aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 96aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @see SurfaceView 97aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @see SurfaceTexture 98aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 99aa6c24c21c727a196451332448d4e3b11a80be69Romain Guypublic class TextureView extends View { 10077a811610f99e21da7f88dafef60d09f345d0506Romain Guy private static final String LOG_TAG = "TextureView"; 10177a811610f99e21da7f88dafef60d09f345d0506Romain Guy 102aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy private HardwareLayer mLayer; 103aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy private SurfaceTexture mSurface; 104aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy private SurfaceTextureListener mListener; 105aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 106a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy private boolean mOpaque = true; 107c989d867f2580a99cde25fab0e49e445aea33f2fRomain Guy 108302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy private final Matrix mMatrix = new Matrix(); 109302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy private boolean mMatrixChanged; 110302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy 11158f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy private final Object[] mLock = new Object[0]; 11258f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy private boolean mUpdateLayer; 11358f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy 1148f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy private SurfaceTexture.OnFrameAvailableListener mUpdateListener; 115aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 1166be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy private Canvas mCanvas; 1176be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy private int mSaveCount; 1186be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 1196be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy private final Object[] mNativeWindowLock = new Object[0]; 1206be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy // Used from native code, do not write! 1216be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy @SuppressWarnings({"UnusedDeclaration"}) 1226be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy private int mNativeWindow; 1236be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 124aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 125aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Creates a new TextureView. 126aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 127aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param context The context to associate this view with. 128aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 129aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public TextureView(Context context) { 130aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy super(context); 131aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy init(); 132aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 133aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 134aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 135aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Creates a new TextureView. 136aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 137aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param context The context to associate this view with. 138aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param attrs The attributes of the XML tag that is inflating the view. 139aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 140aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @SuppressWarnings({"UnusedDeclaration"}) 141aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public TextureView(Context context, AttributeSet attrs) { 142aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy super(context, attrs); 143aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy init(); 144aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 145aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 146aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 147aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Creates a new TextureView. 148aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 149aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param context The context to associate this view with. 150aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param attrs The attributes of the XML tag that is inflating the view. 151aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param defStyle The default style to apply to this view. If 0, no style 152aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * will be applied (beyond what is included in the theme). This may 153aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * either be an attribute resource, whose value will be retrieved 154aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * from the current theme, or an explicit style resource. 155aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 156aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @SuppressWarnings({"UnusedDeclaration"}) 157aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public TextureView(Context context, AttributeSet attrs, int defStyle) { 158aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy super(context, attrs, defStyle); 159aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy init(); 160aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 161aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 162aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy private void init() { 163aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy mLayerPaint = new Paint(); 164aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 165aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 166a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy /** 167a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy * {@inheritDoc} 168a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy */ 169a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy @Override 170a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy public boolean isOpaque() { 171a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy return mOpaque; 172a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy } 173a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy 174a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy /** 175a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy * Indicates whether the content of this TextureView is opaque. The 176a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy * content is assumed to be opaque by default. 177a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy * 178a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy * @param opaque True if the content of this TextureView is opaque, 179a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy * false otherwise 180a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy */ 181a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy public void setOpaque(boolean opaque) { 182a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy if (opaque != mOpaque) { 183a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy mOpaque = opaque; 18458f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy updateLayer(); 185a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy } 186a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy } 187a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy 188aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 189aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy protected void onAttachedToWindow() { 190aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy super.onAttachedToWindow(); 191aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 192aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy if (!isHardwareAccelerated()) { 19377a811610f99e21da7f88dafef60d09f345d0506Romain Guy Log.w(LOG_TAG, "A TextureView or a subclass can only be " 194aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy + "used with hardware acceleration enabled."); 195aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 196aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 197aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 198451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy @Override 199451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy protected void onDetachedFromWindow() { 200451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy super.onDetachedFromWindow(); 201451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy 20280429c458506485904715180d10584092a5cd082Romain Guy if (mLayer != null) { 203402f05530352f34d5320c2d23be43c274d97c4e2Grace Kloba boolean shouldRelease = true; 204451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy if (mListener != null) { 205402f05530352f34d5320c2d23be43c274d97c4e2Grace Kloba shouldRelease = mListener.onSurfaceTextureDestroyed(mSurface); 206451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy } 207451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy 2086be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy synchronized (mNativeWindowLock) { 2096be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy nDestroyNativeWindow(); 2106be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy } 2116be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 2126be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy mLayer.destroy(); 213402f05530352f34d5320c2d23be43c274d97c4e2Grace Kloba if (shouldRelease) mSurface.release(); 214451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy mSurface = null; 215451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy mLayer = null; 216451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy } 217451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy } 218451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy 219aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 220aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * The layer type of a TextureView is ignored since a TextureView is always 221aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * considered to act as a hardware layer. The optional paint supplied to this 222aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * method will however be taken into account when rendering the content of 223aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * this TextureView. 224aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 225aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param layerType The ype of layer to use with this view, must be one of 226aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 227aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * {@link #LAYER_TYPE_HARDWARE} 228aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param paint The paint used to compose the layer. This argument is optional 229aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * and can be null. It is ignored when the layer type is 230aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * {@link #LAYER_TYPE_NONE} 231aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 232aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 233aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public void setLayerType(int layerType, Paint paint) { 234aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy if (paint != mLayerPaint) { 235aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy mLayerPaint = paint; 236aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy invalidate(); 237aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 238aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 239aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 240aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 241aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Always returns {@link #LAYER_TYPE_HARDWARE}. 242aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 243aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 244aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public int getLayerType() { 245aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy return LAYER_TYPE_HARDWARE; 246aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 247aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 248aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 249aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Calling this method has no effect. 250aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 251aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 252aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public void buildLayer() { 253aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 254aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 255aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 256aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Subclasses of TextureView cannot do their own rendering 257aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * with the {@link Canvas} object. 258aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 259aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param canvas The Canvas to which the View is rendered. 260aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 261aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 262aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public final void draw(Canvas canvas) { 26358f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy applyUpdate(); 264c01391fb4eb0eef33d142e89e060eac7e75de39dAlexandre Elias applyTransformMatrix(); 265aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 266aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 267aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 268aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Subclasses of TextureView cannot do their own rendering 269aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * with the {@link Canvas} object. 270aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 271aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param canvas The Canvas to which the View is rendered. 272aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 273aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 274aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy protected final void onDraw(Canvas canvas) { 275aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 276aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 277aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 2788f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy protected void onSizeChanged(int w, int h, int oldw, int oldh) { 2798f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy super.onSizeChanged(w, h, oldw, oldh); 2808f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy if (mSurface != null) { 281e5e0c50f7dfaccc220725c5595080e921ffda1e4Romain Guy nSetDefaultBufferSize(mSurface, getWidth(), getHeight()); 282451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy if (mListener != null) { 283451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy mListener.onSurfaceTextureSizeChanged(mSurface, getWidth(), getHeight()); 284451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy } 2858f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy } 2868f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy } 2878f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy 2888f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy @Override 289aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy HardwareLayer getHardwareLayer() { 290aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy if (mLayer == null) { 29158f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy if (mAttachInfo == null || mAttachInfo.mHardwareRenderer == null) { 29258f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy return null; 29358f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy } 29458f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy 295a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy mLayer = mAttachInfo.mHardwareRenderer.createHardwareLayer(mOpaque); 296e5e0c50f7dfaccc220725c5595080e921ffda1e4Romain Guy mSurface = mAttachInfo.mHardwareRenderer.createSurfaceTexture(mLayer); 297e5e0c50f7dfaccc220725c5595080e921ffda1e4Romain Guy nSetDefaultBufferSize(mSurface, getWidth(), getHeight()); 2986be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy nCreateNativeWindow(mSurface); 299aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 3008f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy mUpdateListener = new SurfaceTexture.OnFrameAvailableListener() { 301aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 302aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public void onFrameAvailable(SurfaceTexture surfaceTexture) { 303aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy // Per SurfaceTexture's documentation, the callback may be invoked 304aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy // from an arbitrary thread 30558f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy synchronized (mLock) { 30658f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy mUpdateLayer = true; 30758f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy } 30858f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy postInvalidateDelayed(0); 309aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 3108f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy }; 3118f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy mSurface.setOnFrameAvailableListener(mUpdateListener); 312aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 313aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy if (mListener != null) { 314451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy mListener.onSurfaceTextureAvailable(mSurface, getWidth(), getHeight()); 315aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 316aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 317aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 31858f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy applyUpdate(); 319c01391fb4eb0eef33d142e89e060eac7e75de39dAlexandre Elias applyTransformMatrix(); 320302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy 321aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy return mLayer; 322aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 323aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 3248f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy @Override 3258f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy protected void onVisibilityChanged(View changedView, int visibility) { 3268f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy super.onVisibilityChanged(changedView, visibility); 3278f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy 3288f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy if (mSurface != null) { 3298f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy // When the view becomes invisible, stop updating it, it's a waste of CPU 3308f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy // To cancel updates, the easiest thing to do is simply to remove the 3318f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy // updates listener 3328f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy if (visibility == VISIBLE) { 3338f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy mSurface.setOnFrameAvailableListener(mUpdateListener); 334a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy updateLayer(); 3358f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy } else { 3368f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy mSurface.setOnFrameAvailableListener(null); 3378f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy } 3388f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy } 3398f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy } 3408f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy 341a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy private void updateLayer() { 34258f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy mUpdateLayer = true; 34358f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy invalidate(); 34458f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy } 34558f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy 34658f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy private void applyUpdate() { 34758f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy if (mLayer == null) { 348a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy return; 349a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy } 350a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy 35158f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy synchronized (mLock) { 35258f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy if (mUpdateLayer) { 35358f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy mUpdateLayer = false; 35458f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy } else { 35558f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy return; 35658f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy } 35758f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy } 35858f4edb7701bf20925468fa5fd1a06a461ff085bRomain Guy 35902ccac69fd1c0a03c24c5f3ace0ad4bed337b1fdRomain Guy mLayer.update(getWidth(), getHeight(), mOpaque); 360a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy 361cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba if (mListener != null) { 362cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba mListener.onSurfaceTextureUpdated(mSurface); 363cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba } 364a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy } 365a9489274d67b540804aafb587a226f7c2ae4464dRomain Guy 366aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 367302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * <p>Sets the transform to associate with this texture view. 368302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * The specified transform applies to the underlying surface 369302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * texture and does not affect the size or position of the view 370302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * itself, only of its content.</p> 371302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * 372302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * <p>Some transforms might prevent the content from drawing 373302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * all the pixels contained within this view's bounds. In such 374302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * situations, make sure this texture view is not marked opaque.</p> 375302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * 376302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * @param transform The transform to apply to the content of 377302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * this view. 378302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * 379302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * @see #getTransform(android.graphics.Matrix) 380302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * @see #isOpaque() 381302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * @see #setOpaque(boolean) 382302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy */ 383302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy public void setTransform(Matrix transform) { 384302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy mMatrix.set(transform); 385302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy mMatrixChanged = true; 386c01391fb4eb0eef33d142e89e060eac7e75de39dAlexandre Elias invalidateParentIfNeeded(); 387302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy } 388302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy 389302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy /** 390302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * Returns the transform associated with this texture view. 391302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * 392302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * @param transform The {@link Matrix} in which to copy the current 393302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * transform. Can be null. 394302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * 395302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * @return The specified matrix if not null or a new {@link Matrix} 396302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * instance otherwise. 397302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * 398302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy * @see #setTransform(android.graphics.Matrix) 399302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy */ 400302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy public Matrix getTransform(Matrix transform) { 401302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy if (transform == null) { 402302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy transform = new Matrix(); 403302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy } 404302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy 405302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy transform.set(mMatrix); 406302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy 407302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy return transform; 408302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy } 409302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy 410c01391fb4eb0eef33d142e89e060eac7e75de39dAlexandre Elias private void applyTransformMatrix() { 411c01391fb4eb0eef33d142e89e060eac7e75de39dAlexandre Elias if (mMatrixChanged) { 412c01391fb4eb0eef33d142e89e060eac7e75de39dAlexandre Elias mLayer.setTransform(mMatrix); 413c01391fb4eb0eef33d142e89e060eac7e75de39dAlexandre Elias mMatrixChanged = false; 414c01391fb4eb0eef33d142e89e060eac7e75de39dAlexandre Elias } 415c01391fb4eb0eef33d142e89e060eac7e75de39dAlexandre Elias } 416c01391fb4eb0eef33d142e89e060eac7e75de39dAlexandre Elias 417302a9df1d50373c82923bb84ff665dfce584fb22Romain Guy /** 41877a811610f99e21da7f88dafef60d09f345d0506Romain Guy * <p>Returns a {@link android.graphics.Bitmap} representation of the content 41977a811610f99e21da7f88dafef60d09f345d0506Romain Guy * of the associated surface texture. If the surface texture is not available, 42077a811610f99e21da7f88dafef60d09f345d0506Romain Guy * this method returns null.</p> 42177a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 42277a811610f99e21da7f88dafef60d09f345d0506Romain Guy * <p>The bitmap returned by this method uses the {@link Bitmap.Config#ARGB_8888} 42377a811610f99e21da7f88dafef60d09f345d0506Romain Guy * pixel format and its dimensions are the same as this view's.</p> 42477a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 42577a811610f99e21da7f88dafef60d09f345d0506Romain Guy * <p><strong>Do not</strong> invoke this method from a drawing method 42677a811610f99e21da7f88dafef60d09f345d0506Romain Guy * ({@link #onDraw(android.graphics.Canvas)} for instance).</p> 42777a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 428d6b2a00dd43257d1498b09175bff63663f6cb861Romain Guy * <p>If an error occurs during the copy, an empty bitmap will be returned.</p> 429d6b2a00dd43257d1498b09175bff63663f6cb861Romain Guy * 43077a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @return A valid {@link Bitmap.Config#ARGB_8888} bitmap, or null if the surface 43177a811610f99e21da7f88dafef60d09f345d0506Romain Guy * texture is not available or the width <= 0 or the height <= 0 43277a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 43377a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @see #isAvailable() 43477a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @see #getBitmap(android.graphics.Bitmap) 43577a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @see #getBitmap(int, int) 43677a811610f99e21da7f88dafef60d09f345d0506Romain Guy */ 43777a811610f99e21da7f88dafef60d09f345d0506Romain Guy public Bitmap getBitmap() { 43877a811610f99e21da7f88dafef60d09f345d0506Romain Guy return getBitmap(getWidth(), getHeight()); 43977a811610f99e21da7f88dafef60d09f345d0506Romain Guy } 44077a811610f99e21da7f88dafef60d09f345d0506Romain Guy 44177a811610f99e21da7f88dafef60d09f345d0506Romain Guy /** 44277a811610f99e21da7f88dafef60d09f345d0506Romain Guy * <p>Returns a {@link android.graphics.Bitmap} representation of the content 44377a811610f99e21da7f88dafef60d09f345d0506Romain Guy * of the associated surface texture. If the surface texture is not available, 44477a811610f99e21da7f88dafef60d09f345d0506Romain Guy * this method returns null.</p> 44577a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 44677a811610f99e21da7f88dafef60d09f345d0506Romain Guy * <p>The bitmap returned by this method uses the {@link Bitmap.Config#ARGB_8888} 44777a811610f99e21da7f88dafef60d09f345d0506Romain Guy * pixel format.</p> 44877a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 44977a811610f99e21da7f88dafef60d09f345d0506Romain Guy * <p><strong>Do not</strong> invoke this method from a drawing method 45077a811610f99e21da7f88dafef60d09f345d0506Romain Guy * ({@link #onDraw(android.graphics.Canvas)} for instance).</p> 45177a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 452d6b2a00dd43257d1498b09175bff63663f6cb861Romain Guy * <p>If an error occurs during the copy, an empty bitmap will be returned.</p> 453d6b2a00dd43257d1498b09175bff63663f6cb861Romain Guy * 45477a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @param width The width of the bitmap to create 45577a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @param height The height of the bitmap to create 45677a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 45777a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @return A valid {@link Bitmap.Config#ARGB_8888} bitmap, or null if the surface 45877a811610f99e21da7f88dafef60d09f345d0506Romain Guy * texture is not available or width is <= 0 or height is <= 0 45977a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 46077a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @see #isAvailable() 46177a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @see #getBitmap(android.graphics.Bitmap) 46277a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @see #getBitmap() 46377a811610f99e21da7f88dafef60d09f345d0506Romain Guy */ 46477a811610f99e21da7f88dafef60d09f345d0506Romain Guy public Bitmap getBitmap(int width, int height) { 46577a811610f99e21da7f88dafef60d09f345d0506Romain Guy if (isAvailable() && width > 0 && height > 0) { 46677a811610f99e21da7f88dafef60d09f345d0506Romain Guy return getBitmap(Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)); 46777a811610f99e21da7f88dafef60d09f345d0506Romain Guy } 46877a811610f99e21da7f88dafef60d09f345d0506Romain Guy return null; 46977a811610f99e21da7f88dafef60d09f345d0506Romain Guy } 47077a811610f99e21da7f88dafef60d09f345d0506Romain Guy 47177a811610f99e21da7f88dafef60d09f345d0506Romain Guy /** 47277a811610f99e21da7f88dafef60d09f345d0506Romain Guy * <p>Copies the content of this view's surface texture into the specified 47377a811610f99e21da7f88dafef60d09f345d0506Romain Guy * bitmap. If the surface texture is not available, the copy is not executed. 47477a811610f99e21da7f88dafef60d09f345d0506Romain Guy * The content of the surface texture will be scaled to fit exactly inside 47577a811610f99e21da7f88dafef60d09f345d0506Romain Guy * the specified bitmap.</p> 47677a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 47777a811610f99e21da7f88dafef60d09f345d0506Romain Guy * <p><strong>Do not</strong> invoke this method from a drawing method 47877a811610f99e21da7f88dafef60d09f345d0506Romain Guy * ({@link #onDraw(android.graphics.Canvas)} for instance).</p> 47977a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 480d6b2a00dd43257d1498b09175bff63663f6cb861Romain Guy * <p>If an error occurs, the bitmap is left unchanged.</p> 481d6b2a00dd43257d1498b09175bff63663f6cb861Romain Guy * 48277a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @param bitmap The bitmap to copy the content of the surface texture into, 48377a811610f99e21da7f88dafef60d09f345d0506Romain Guy * cannot be null, all configurations are supported 48477a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 48577a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @return The bitmap specified as a parameter 48677a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 48777a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @see #isAvailable() 48877a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @see #getBitmap(int, int) 48977a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @see #getBitmap() 49077a811610f99e21da7f88dafef60d09f345d0506Romain Guy */ 49177a811610f99e21da7f88dafef60d09f345d0506Romain Guy public Bitmap getBitmap(Bitmap bitmap) { 49277a811610f99e21da7f88dafef60d09f345d0506Romain Guy if (bitmap != null && isAvailable()) { 49302ccac69fd1c0a03c24c5f3ace0ad4bed337b1fdRomain Guy mLayer.copyInto(bitmap); 49477a811610f99e21da7f88dafef60d09f345d0506Romain Guy } 49577a811610f99e21da7f88dafef60d09f345d0506Romain Guy return bitmap; 49677a811610f99e21da7f88dafef60d09f345d0506Romain Guy } 49777a811610f99e21da7f88dafef60d09f345d0506Romain Guy 49877a811610f99e21da7f88dafef60d09f345d0506Romain Guy /** 49977a811610f99e21da7f88dafef60d09f345d0506Romain Guy * Returns true if the {@link SurfaceTexture} associated with this 50077a811610f99e21da7f88dafef60d09f345d0506Romain Guy * TextureView is available for rendering. When this method returns 50177a811610f99e21da7f88dafef60d09f345d0506Romain Guy * true, {@link #getSurfaceTexture()} returns a valid surface texture. 50277a811610f99e21da7f88dafef60d09f345d0506Romain Guy */ 50377a811610f99e21da7f88dafef60d09f345d0506Romain Guy public boolean isAvailable() { 50477a811610f99e21da7f88dafef60d09f345d0506Romain Guy return mSurface != null; 50577a811610f99e21da7f88dafef60d09f345d0506Romain Guy } 50677a811610f99e21da7f88dafef60d09f345d0506Romain Guy 50777a811610f99e21da7f88dafef60d09f345d0506Romain Guy /** 5086be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * <p>Start editing the pixels in the surface. The returned Canvas can be used 5096be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * to draw into the surface's bitmap. A null is returned if the surface has 5106be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * not been created or otherwise cannot be edited. You will usually need 5116be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * to implement 5126be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * {@link SurfaceTextureListener#onSurfaceTextureAvailable(android.graphics.SurfaceTexture, int, int)} 5136be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * to find out when the Surface is available for use.</p> 5146be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * 5156be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * <p>The content of the Surface is never preserved between unlockCanvas() 5166be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * and lockCanvas(), for this reason, every pixel within the Surface area 5176be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * must be written. The only exception to this rule is when a dirty 5186be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * rectangle is specified, in which case, non-dirty pixels will be 5196be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * preserved.</p> 5206be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * 5216be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * @return A Canvas used to draw into the surface. 5226be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * 5236be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * @see #lockCanvas(android.graphics.Rect) 5246be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * @see #unlockCanvasAndPost(android.graphics.Canvas) 5256be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy */ 5266be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy public Canvas lockCanvas() { 5276be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy return lockCanvas(null); 5286be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy } 5296be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 5306be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy /** 5316be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * Just like {@link #lockCanvas()} but allows specification of a dirty 5326be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * rectangle. Every pixel within that rectangle must be written; however 5336be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * pixels outside the dirty rectangle will be preserved by the next call 5346be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * to lockCanvas(). 5356be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * 5366be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * @param dirty Area of the surface that will be modified. 5376be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 5386be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * @return A Canvas used to draw into the surface. 5396be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * 5406be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * @see #lockCanvas() 5416be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * @see #unlockCanvasAndPost(android.graphics.Canvas) 5426be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy */ 5436be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy public Canvas lockCanvas(Rect dirty) { 5446be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy if (!isAvailable()) return null; 5456be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 5466be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy if (mCanvas == null) { 5476be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy mCanvas = new Canvas(); 5486be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy } 5496be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 5506be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy synchronized (mNativeWindowLock) { 5516be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy nLockCanvas(mNativeWindow, mCanvas, dirty); 5526be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy } 5536be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy mSaveCount = mCanvas.save(); 5546be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 5556be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy return mCanvas; 5566be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy } 5576be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 5586be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy /** 5596be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * Finish editing pixels in the surface. After this call, the surface's 5606be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * current pixels will be shown on the screen, but its content is lost, 5616be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * in particular there is no guarantee that the content of the Surface 5626be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * will remain unchanged when lockCanvas() is called again. 5636be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * 5646be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * @param canvas The Canvas previously returned by lockCanvas() 5656be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * 5666be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * @see #lockCanvas() 5676be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy * @see #lockCanvas(android.graphics.Rect) 5686be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy */ 5696be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy public void unlockCanvasAndPost(Canvas canvas) { 5706be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy if (mCanvas != null && canvas == mCanvas) { 5716be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy canvas.restoreToCount(mSaveCount); 5726be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy mSaveCount = 0; 5736be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 5746be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy synchronized (mNativeWindowLock) { 5756be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy nUnlockCanvasAndPost(mNativeWindow, mCanvas); 5766be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy } 5776be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy } 5786be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy } 5796be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 5806be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy /** 581aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Returns the {@link SurfaceTexture} used by this view. This method 58277a811610f99e21da7f88dafef60d09f345d0506Romain Guy * may return null if the view is not attached to a window or if the surface 58377a811610f99e21da7f88dafef60d09f345d0506Romain Guy * texture has not been initialized yet. 58477a811610f99e21da7f88dafef60d09f345d0506Romain Guy * 58577a811610f99e21da7f88dafef60d09f345d0506Romain Guy * @see #isAvailable() 586aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 587aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public SurfaceTexture getSurfaceTexture() { 588aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy return mSurface; 589aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 590aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 591aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 592aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Returns the {@link SurfaceTextureListener} currently associated with this 593aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * texture view. 594aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 595aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @see #setSurfaceTextureListener(android.view.TextureView.SurfaceTextureListener) 596aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @see SurfaceTextureListener 597aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 598aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public SurfaceTextureListener getSurfaceTextureListener() { 599aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy return mListener; 600aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 601aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 602aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 603aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Sets the {@link SurfaceTextureListener} used to listen to surface 604aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * texture events. 605aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 606aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @see #getSurfaceTextureListener() 607aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @see SurfaceTextureListener 608aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 609aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public void setSurfaceTextureListener(SurfaceTextureListener listener) { 610aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy mListener = listener; 611aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 612aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 613aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 614aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * This listener can be used to be notified when the surface texture 615aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * associated with this texture view is available. 616aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 617aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public static interface SurfaceTextureListener { 618aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 619aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Invoked when a {@link TextureView}'s SurfaceTexture is ready for use. 620aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 621aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param surface The surface returned by 622aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * {@link android.view.TextureView#getSurfaceTexture()} 623451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy * @param width The width of the surface 624451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy * @param height The height of the surface 625aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 626451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height); 6278f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy 6288f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy /** 6298f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * Invoked when the {@link SurfaceTexture}'s buffers size changed. 6308f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * 6318f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * @param surface The surface returned by 6328f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * {@link android.view.TextureView#getSurfaceTexture()} 6338f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * @param width The new width of the surface 6348f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * @param height The new height of the surface 6358f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy */ 6368f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height); 637451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy 638451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy /** 639451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy * Invoked when the specified {@link SurfaceTexture} is about to be destroyed. 640402f05530352f34d5320c2d23be43c274d97c4e2Grace Kloba * If returns true, no rendering should happen inside the surface texture after this method 641402f05530352f34d5320c2d23be43c274d97c4e2Grace Kloba * is invoked. If returns false, the client needs to call {@link SurfaceTexture#release()}. 642451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy * 643451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy * @param surface The surface about to be destroyed 644451ce44a18e4c48f8a43aa250957f76967a35d31Romain Guy */ 645402f05530352f34d5320c2d23be43c274d97c4e2Grace Kloba public boolean onSurfaceTextureDestroyed(SurfaceTexture surface); 646cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba 647cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba /** 648cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba * Invoked when the specified {@link SurfaceTexture} is updated through 649cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba * {@link SurfaceTexture#updateTexImage()}. 650cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba * 651cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba * @param surface The surface just updated 652cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba */ 653cf559377b750271472aa0a717bf3b7d34abc0b39Grace Kloba public void onSurfaceTextureUpdated(SurfaceTexture surface); 654aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 6558f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy 6566be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy private native void nCreateNativeWindow(SurfaceTexture surface); 6576be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy private native void nDestroyNativeWindow(); 6586be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 659d6b2a00dd43257d1498b09175bff63663f6cb861Romain Guy private static native void nSetDefaultBufferSize(SurfaceTexture surfaceTexture, 660d6b2a00dd43257d1498b09175bff63663f6cb861Romain Guy int width, int height); 6616be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy 6626be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy private static native void nLockCanvas(int nativeWindow, Canvas canvas, Rect dirty); 6636be3d5561cbeccf0a8257a4acb155657f868e548Romain Guy private static native void nUnlockCanvasAndPost(int nativeWindow, Canvas canvas); 664aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy} 665