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      1 /*
      2  * Copyright (C) 2008 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.drawable;
     18 
     19 import android.content.res.Resources;
     20 import android.graphics.Canvas;
     21 import android.graphics.ColorFilter;
     22 import android.graphics.Matrix;
     23 import android.graphics.Matrix.ScaleToFit;
     24 import android.graphics.drawable.Drawable;
     25 import android.graphics.Picture;
     26 import android.graphics.PixelFormat;
     27 import android.graphics.Rect;
     28 import android.view.Gravity;
     29 
     30 /**
     31  * Drawable subclass that wraps a Picture, allowing the picture to be used
     32  * whereever a Drawable is supported.
     33  */
     34 public class PictureDrawable extends Drawable {
     35 
     36     private Picture mPicture;
     37 
     38     /**
     39      * Construct a new drawable referencing the specified picture. The picture
     40      * may be null.
     41      *
     42      * @param picture The picture to associate with the drawable. May be null.
     43      */
     44     public PictureDrawable(Picture picture) {
     45         mPicture = picture;
     46     }
     47 
     48     /**
     49      * Return the picture associated with the drawable. May be null.
     50      *
     51      * @return the picture associated with the drawable, or null.
     52      */
     53     public Picture getPicture() {
     54         return mPicture;
     55     }
     56 
     57     /**
     58      * Associate a picture with this drawable. The picture may be null.
     59      *
     60      * @param picture The picture to associate with the drawable. May be null.
     61      */
     62     public void setPicture(Picture picture) {
     63         mPicture = picture;
     64     }
     65 
     66     @Override
     67     public void draw(Canvas canvas) {
     68         if (mPicture != null) {
     69             Rect bounds = getBounds();
     70             canvas.save();
     71             canvas.clipRect(bounds);
     72             canvas.translate(bounds.left, bounds.top);
     73             canvas.drawPicture(mPicture);
     74             canvas.restore();
     75         }
     76     }
     77 
     78     @Override
     79     public int getIntrinsicWidth() {
     80         return mPicture != null ? mPicture.getWidth() : -1;
     81     }
     82 
     83     @Override
     84     public int getIntrinsicHeight() {
     85         return mPicture != null ? mPicture.getHeight() : -1;
     86     }
     87 
     88     @Override
     89     public int getOpacity() {
     90         // not sure, so be safe
     91         return PixelFormat.TRANSLUCENT;
     92     }
     93 
     94     @Override
     95     public void setFilterBitmap(boolean filter) {}
     96 
     97     @Override
     98     public void setDither(boolean dither) {}
     99 
    100     @Override
    101     public void setColorFilter(ColorFilter colorFilter) {}
    102 
    103     @Override
    104     public void setAlpha(int alpha) {}
    105 }
    106 
    107