TextureView.java revision 8f0095cd33558e9cc8a440047908e53b68906f5f
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; 20aa6c24c21c727a196451332448d4e3b11a80be69Romain Guyimport android.graphics.Canvas; 21aa6c24c21c727a196451332448d4e3b11a80be69Romain Guyimport android.graphics.Paint; 22aa6c24c21c727a196451332448d4e3b11a80be69Romain Guyimport android.graphics.SurfaceTexture; 23aa6c24c21c727a196451332448d4e3b11a80be69Romain Guyimport android.util.AttributeSet; 24aa6c24c21c727a196451332448d4e3b11a80be69Romain Guyimport android.util.Log; 25aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 26aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy/** 27aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <p>A TextureView can be used to display a content stream. Such a content 28aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * stream can for instance be a video or an OpenGL scene. The content stream 29aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * can come from the application's process as well as a remote process.</p> 30aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 31aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <p>TextureView can only be used in a hardware accelerated window. When 32aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * rendered in software, TextureView will draw nothing.</p> 33aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 34aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <p>Unlike {@link SurfaceView}, TextureView does not create a separate 35aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * window but behaves as a regular View. This key difference allows a 36aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * TextureView to be moved, transformed, animated, etc. For instance, you 37aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * can make a TextureView semi-translucent by calling 38aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <code>myView.setAlpha(0.5f)</code>.</p> 39aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 40aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <p>Using a TextureView is simple: all you need to do is get its 41aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * {@link SurfaceTexture}. The {@link SurfaceTexture} can then be used to 42aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * render content. The following example demonstrates how to render the 43aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * camera preview into a TextureView:</p> 44aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 45aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <pre> 46aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * public class LiveCameraActivity extends Activity implements TextureView.SurfaceTextureListener { 47aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * private Camera mCamera; 48aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * private TextureView mTextureView; 49aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 50aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * protected void onCreate(Bundle savedInstanceState) { 51aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * super.onCreate(savedInstanceState); 52aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 53aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * mTextureView = new TextureView(this); 54aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * mTextureView.setSurfaceTextureListener(this); 55aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 56aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * setContentView(mTextureView); 57aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * } 58aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 59aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * protected void onDestroy() { 60aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * super.onDestroy(); 61aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 62aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * mCamera.stopPreview(); 63aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * mCamera.release(); 64aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * } 65aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 66aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * public void onSurfaceTextureAvailable(SurfaceTexture surface) { 67aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * mCamera = Camera.open(); 68aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 69aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * try { 70aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * mCamera.setPreviewTexture(surface); 71aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * mCamera.startPreview(); 72aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * } catch (IOException ioe) { 73aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * // Something bad happened 74aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * } 75aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * } 768f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * 778f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) { 788f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * // Ignored, Camera does all the work for us 798f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * } 80aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * } 81aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * </pre> 82aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 83aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * <p>A TextureView's SurfaceTexture can be obtained either by invoking 84aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * {@link #getSurfaceTexture()} or by using a {@link SurfaceTextureListener}. 85aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * It is important to know that a SurfaceTexture is available only after the 86aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * TextureView is attached to a window (and {@link #onAttachedToWindow()} has 87aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * been invoked.) It is therefore highly recommended you use a listener to 88aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * be notified when the SurfaceTexture becomes available.</p> 89aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 90aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @see SurfaceView 91aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @see SurfaceTexture 92aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 93aa6c24c21c727a196451332448d4e3b11a80be69Romain Guypublic class TextureView extends View { 94aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy private HardwareLayer mLayer; 95aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy private SurfaceTexture mSurface; 96aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy private SurfaceTextureListener mListener; 97aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 98aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy private final Runnable mUpdateLayerAction = new Runnable() { 99aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 100aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public void run() { 101aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy updateLayer(); 102aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 103aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy }; 1048f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy private SurfaceTexture.OnFrameAvailableListener mUpdateListener; 105aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 106aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 107aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Creates a new TextureView. 108aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 109aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param context The context to associate this view with. 110aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 111aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public TextureView(Context context) { 112aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy super(context); 113aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy init(); 114aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 115aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 116aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 117aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Creates a new TextureView. 118aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 119aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param context The context to associate this view with. 120aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param attrs The attributes of the XML tag that is inflating the view. 121aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 122aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @SuppressWarnings({"UnusedDeclaration"}) 123aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public TextureView(Context context, AttributeSet attrs) { 124aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy super(context, attrs); 125aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy init(); 126aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 127aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 128aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 129aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Creates a new TextureView. 130aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 131aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param context The context to associate this view with. 132aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param attrs The attributes of the XML tag that is inflating the view. 133aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param defStyle The default style to apply to this view. If 0, no style 134aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * will be applied (beyond what is included in the theme). This may 135aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * either be an attribute resource, whose value will be retrieved 136aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * from the current theme, or an explicit style resource. 137aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 138aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @SuppressWarnings({"UnusedDeclaration"}) 139aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public TextureView(Context context, AttributeSet attrs, int defStyle) { 140aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy super(context, attrs, defStyle); 141aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy init(); 142aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 143aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 144aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy private void init() { 145aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy mLayerPaint = new Paint(); 146aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 147aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 148aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 149aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy protected void onAttachedToWindow() { 150aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy super.onAttachedToWindow(); 151aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 152aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy if (!isHardwareAccelerated()) { 153aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy Log.w("TextureView", "A TextureView or a subclass can only be " 154aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy + "used with hardware acceleration enabled."); 155aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 156aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 157aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 158aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 159aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * The layer type of a TextureView is ignored since a TextureView is always 160aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * considered to act as a hardware layer. The optional paint supplied to this 161aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * method will however be taken into account when rendering the content of 162aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * this TextureView. 163aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 164aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param layerType The ype of layer to use with this view, must be one of 165aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 166aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * {@link #LAYER_TYPE_HARDWARE} 167aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param paint The paint used to compose the layer. This argument is optional 168aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * and can be null. It is ignored when the layer type is 169aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * {@link #LAYER_TYPE_NONE} 170aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 171aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 172aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public void setLayerType(int layerType, Paint paint) { 173aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy if (paint != mLayerPaint) { 174aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy mLayerPaint = paint; 175aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy invalidate(); 176aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 177aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 178aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 179aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 180aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Always returns {@link #LAYER_TYPE_HARDWARE}. 181aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 182aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 183aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public int getLayerType() { 184aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy return LAYER_TYPE_HARDWARE; 185aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 186aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 187aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 188aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Calling this method has no effect. 189aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 190aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 191aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public void buildLayer() { 192aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 193aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 194aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 195aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Subclasses of TextureView cannot do their own rendering 196aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * with the {@link Canvas} object. 197aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 198aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param canvas The Canvas to which the View is rendered. 199aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 200aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 201aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public final void draw(Canvas canvas) { 202aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy super.draw(canvas); 203aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 204aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 205aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 206aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Subclasses of TextureView cannot do their own rendering 207aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * with the {@link Canvas} object. 208aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 209aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param canvas The Canvas to which the View is rendered. 210aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 211aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 212aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy protected final void onDraw(Canvas canvas) { 213aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 214aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 215aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 2168f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy protected void onSizeChanged(int w, int h, int oldw, int oldh) { 2178f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy super.onSizeChanged(w, h, oldw, oldh); 2188f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy if (mSurface != null) { 2198f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy nSetDefaultBufferSize(mSurface.mSurfaceTexture, getWidth(), getHeight()); 2208f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy } 2218f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy } 2228f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy 2238f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy @Override 224aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy HardwareLayer getHardwareLayer() { 225aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy if (mAttachInfo == null || mAttachInfo.mHardwareRenderer == null) { 226aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy return null; 227aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 228aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 229aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy if (mLayer == null) { 230aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy mLayer = mAttachInfo.mHardwareRenderer.createHardwareLayer(); 231aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy mSurface = mAttachInfo.mHardwareRenderer.createSuraceTexture(mLayer); 2328f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy nSetDefaultBufferSize(mSurface.mSurfaceTexture, getWidth(), getHeight()); 233aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 2348f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy mUpdateListener = new SurfaceTexture.OnFrameAvailableListener() { 235aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy @Override 236aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public void onFrameAvailable(SurfaceTexture surfaceTexture) { 237aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy // Per SurfaceTexture's documentation, the callback may be invoked 238aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy // from an arbitrary thread 239aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy post(mUpdateLayerAction); 240aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 2418f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy }; 2428f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy mSurface.setOnFrameAvailableListener(mUpdateListener); 243aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 244aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy if (mListener != null) { 245aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy mListener.onSurfaceTextureAvailable(mSurface); 246aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 247aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 248aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 249aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy return mLayer; 250aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 251aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 2528f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy @Override 2538f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy protected void onVisibilityChanged(View changedView, int visibility) { 2548f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy super.onVisibilityChanged(changedView, visibility); 2558f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy 2568f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy if (mSurface != null) { 2578f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy // When the view becomes invisible, stop updating it, it's a waste of CPU 2588f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy // To cancel updates, the easiest thing to do is simply to remove the 2598f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy // updates listener 2608f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy if (visibility == VISIBLE) { 2618f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy mSurface.setOnFrameAvailableListener(mUpdateListener); 2628f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy updateLayer(); 2638f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy } else { 2648f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy mSurface.setOnFrameAvailableListener(null); 2658f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy } 2668f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy } 2678f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy } 2688f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy 269aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy private void updateLayer() { 270aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy if (mAttachInfo == null || mAttachInfo.mHardwareRenderer == null) { 271aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy return; 272aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 273aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 2748f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy mAttachInfo.mHardwareRenderer.updateTextureLayer(mLayer, getWidth(), getHeight(), mSurface); 275aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 276aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy invalidate(); 277aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 278aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 279aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 280aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Returns the {@link SurfaceTexture} used by this view. This method 281aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * may return null if the view is not attached to a window. 282aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 283aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public SurfaceTexture getSurfaceTexture() { 284aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy return mSurface; 285aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 286aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 287aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 288aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Returns the {@link SurfaceTextureListener} currently associated with this 289aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * texture view. 290aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 291aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @see #setSurfaceTextureListener(android.view.TextureView.SurfaceTextureListener) 292aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @see SurfaceTextureListener 293aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 294aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public SurfaceTextureListener getSurfaceTextureListener() { 295aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy return mListener; 296aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 297aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 298aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 299aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Sets the {@link SurfaceTextureListener} used to listen to surface 300aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * texture events. 301aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 302aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @see #getSurfaceTextureListener() 303aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @see SurfaceTextureListener 304aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 305aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public void setSurfaceTextureListener(SurfaceTextureListener listener) { 306aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy mListener = listener; 307aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 308aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy 309aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 310aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * This listener can be used to be notified when the surface texture 311aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * associated with this texture view is available. 312aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 313aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public static interface SurfaceTextureListener { 314aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy /** 315aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * Invoked when a {@link TextureView}'s SurfaceTexture is ready for use. 316aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * 317aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * @param surface The surface returned by 318aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy * {@link android.view.TextureView#getSurfaceTexture()} 319aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy */ 320aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy public void onSurfaceTextureAvailable(SurfaceTexture surface); 3218f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy 3228f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy /** 3238f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * Invoked when the {@link SurfaceTexture}'s buffers size changed. 3248f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * 3258f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * @param surface The surface returned by 3268f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * {@link android.view.TextureView#getSurfaceTexture()} 3278f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * @param width The new width of the surface 3288f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy * @param height The new height of the surface 3298f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy */ 3308f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height); 331aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy } 3328f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy 3338f0095cd33558e9cc8a440047908e53b68906f5fRomain Guy private static native void nSetDefaultBufferSize(int surfaceTexture, int width, int height); 334aa6c24c21c727a196451332448d4e3b11a80be69Romain Guy} 335