Home | History | Annotate | Download | only in view 
      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 
     18 package android.view;
     19 
     20 import android.graphics.Bitmap;
     21 import android.graphics.Paint;
     22 
     23 /**
     24  * An OpenGL ES 2.0 implementation of {@link HardwareLayer}.
     25  */
     26 abstract class GLES20Layer extends HardwareLayer {
     27     int mLayer;
     28     Finalizer mFinalizer;
     29 
     30     GLES20Layer() {
     31     }
     32 
     33     GLES20Layer(int width, int height, boolean opaque) {
     34         super(width, height, opaque);
     35     }
     36 
     37     /**
     38      * Returns the native layer object used to render this layer.
     39      *
     40      * @return A pointer to the native layer object, or 0 if the object is NULL
     41      */
     42     public int getLayer() {
     43         return mLayer;
     44     }
     45 
     46     @Override
     47     void setLayerPaint(Paint paint) {
     48         if (paint != null) {
     49             GLES20Canvas.nSetLayerPaint(mLayer, paint.mNativePaint);
     50             GLES20Canvas.nSetLayerColorFilter(mLayer, paint.getColorFilter() != null ?
     51                     paint.getColorFilter().nativeColorFilter : 0);
     52         }
     53     }
     54 
     55     @Override
     56     public boolean copyInto(Bitmap bitmap) {
     57         return GLES20Canvas.nCopyLayer(mLayer, bitmap.mNativeBitmap);
     58     }
     59 
     60     @Override
     61     public void destroy() {
     62         if (mDisplayList != null) {
     63             mDisplayList.reset();
     64         }
     65         if (mFinalizer != null) {
     66             mFinalizer.destroy();
     67             mFinalizer = null;
     68         }
     69         mLayer = 0;
     70     }
     71 
     72     @Override
     73     void clearStorage() {
     74         if (mLayer != 0) GLES20Canvas.nClearLayerTexture(mLayer);
     75     }
     76 
     77     static class Finalizer {
     78         private int mLayerId;
     79 
     80         public Finalizer(int layerId) {
     81             mLayerId = layerId;
     82         }
     83 
     84         @Override
     85         protected void finalize() throws Throwable {
     86             try {
     87                 if (mLayerId != 0) {
     88                     GLES20Canvas.nDestroyLayerDeferred(mLayerId);
     89                 }
     90             } finally {
     91                 super.finalize();
     92             }
     93         }
     94 
     95         void destroy() {
     96             GLES20Canvas.nDestroyLayer(mLayerId);
     97             mLayerId = 0;
     98         }
     99     }
    100 }
    101