1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.view; 18 19 import android.graphics.Canvas; 20 import android.graphics.Matrix; 21 import android.graphics.Rect; 22 import android.graphics.SurfaceTexture; 23 24 /** 25 * An OpenGL ES 2.0 implementation of {@link HardwareLayer}. This 26 * implementation can be used as a texture. Rendering into this 27 * layer is not controlled by a {@link HardwareCanvas}. 28 */ 29 class GLES20TextureLayer extends GLES20Layer { 30 private int mTexture; 31 private SurfaceTexture mSurface; 32 33 GLES20TextureLayer(boolean isOpaque) { 34 int[] layerInfo = new int[2]; 35 mLayer = GLES20Canvas.nCreateTextureLayer(isOpaque, layerInfo); 36 37 if (mLayer != 0) { 38 mTexture = layerInfo[0]; 39 mFinalizer = new Finalizer(mLayer); 40 } else { 41 mFinalizer = null; 42 } 43 } 44 45 @Override 46 boolean isValid() { 47 return mLayer != 0 && mTexture != 0; 48 } 49 50 @Override 51 boolean resize(int width, int height) { 52 return isValid(); 53 } 54 55 @Override 56 HardwareCanvas getCanvas() { 57 return null; 58 } 59 60 @Override 61 HardwareCanvas start(Canvas currentCanvas) { 62 return null; 63 } 64 65 @Override 66 void end(Canvas currentCanvas) { 67 } 68 69 SurfaceTexture getSurfaceTexture() { 70 if (mSurface == null) { 71 mSurface = new SurfaceTexture(mTexture, false); 72 } 73 return mSurface; 74 } 75 76 void setSurfaceTexture(SurfaceTexture surfaceTexture) { 77 if (mSurface != null) { 78 mSurface.release(); 79 } 80 mSurface = surfaceTexture; 81 mSurface.attachToGLContext(mTexture); 82 } 83 84 @Override 85 void update(int width, int height, boolean isOpaque) { 86 super.update(width, height, isOpaque); 87 GLES20Canvas.nUpdateTextureLayer(mLayer, width, height, isOpaque, mSurface); 88 } 89 90 @Override 91 void setOpaque(boolean isOpaque) { 92 throw new UnsupportedOperationException("Use update(int, int, boolean) instead"); 93 } 94 95 @Override 96 void setTransform(Matrix matrix) { 97 GLES20Canvas.nSetTextureLayerTransform(mLayer, matrix.native_instance); 98 } 99 100 @Override 101 void redrawLater(DisplayList displayList, Rect dirtyRect) { 102 } 103 } 104