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 */ PictureDrawable(Picture picture)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 */ getPicture()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 */ setPicture(Picture picture)62 public void setPicture(Picture picture) { 63 mPicture = picture; 64 } 65 66 @Override draw(Canvas canvas)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 getIntrinsicWidth()79 public int getIntrinsicWidth() { 80 return mPicture != null ? mPicture.getWidth() : -1; 81 } 82 83 @Override getIntrinsicHeight()84 public int getIntrinsicHeight() { 85 return mPicture != null ? mPicture.getHeight() : -1; 86 } 87 88 @Override getOpacity()89 public int getOpacity() { 90 // not sure, so be safe 91 return PixelFormat.TRANSLUCENT; 92 } 93 94 @Override setFilterBitmap(boolean filter)95 public void setFilterBitmap(boolean filter) {} 96 97 @Override setDither(boolean dither)98 public void setDither(boolean dither) {} 99 100 @Override setColorFilter(ColorFilter colorFilter)101 public void setColorFilter(ColorFilter colorFilter) {} 102 103 @Override setAlpha(int alpha)104 public void setAlpha(int alpha) {} 105 } 106 107