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      1 /*
      2  * Copyright (C) 2010 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.graphics;
     18 
     19 import com.android.layoutlib.bridge.impl.DelegateManager;
     20 import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
     21 
     22 /**
     23  * Delegate implementing the native methods of android.graphics.LayerRasterizer
     24  *
     25  * Through the layoutlib_create tool, the original native methods of LayerRasterizer have
     26  * been replaced by calls to methods of the same name in this delegate class.
     27  *
     28  * This class behaves like the original native implementation, but in Java, keeping previously
     29  * native data into its own objects and mapping them to int that are sent back and forth between
     30  * it and the original LayerRasterizer class.
     31  *
     32  * Because this extends {@link Rasterizer_Delegate}, there's no need to use a
     33  * {@link DelegateManager}, as all the Shader classes will be added to the manager
     34  * owned by {@link Rasterizer_Delegate}.
     35  *
     36  * @see Rasterizer_Delegate
     37  *
     38  */
     39 public class LayerRasterizer_Delegate extends Rasterizer_Delegate {
     40 
     41     // ---- delegate data ----
     42 
     43     // ---- Public Helper methods ----
     44 
     45     @Override
     46     public boolean isSupported() {
     47         return false;
     48     }
     49 
     50     @Override
     51     public String getSupportMessage() {
     52         return "Layer Rasterizers are not supported.";
     53     }
     54 
     55     // ---- native methods ----
     56 
     57     @LayoutlibDelegate
     58     /*package*/ static int nativeConstructor() {
     59         LayerRasterizer_Delegate newDelegate = new LayerRasterizer_Delegate();
     60         return sManager.addNewDelegate(newDelegate);
     61     }
     62 
     63     @LayoutlibDelegate
     64     /*package*/ static void nativeAddLayer(int native_layer, int native_paint, float dx, float dy) {
     65 
     66     }
     67 
     68     // ---- Private delegate/helper methods ----
     69 }
     70