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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 com.android.launcher2;
     18 
     19 import android.graphics.Bitmap;
     20 import android.graphics.Canvas;
     21 import android.graphics.ColorFilter;
     22 import android.graphics.Paint;
     23 import android.graphics.PixelFormat;
     24 import android.graphics.Rect;
     25 import android.graphics.drawable.Drawable;
     26 
     27 class FastBitmapDrawable extends Drawable {
     28     private Bitmap mBitmap;
     29     private int mAlpha;
     30     private int mWidth;
     31     private int mHeight;
     32     private final Paint mPaint = new Paint(Paint.FILTER_BITMAP_FLAG);
     33 
     34     FastBitmapDrawable(Bitmap b) {
     35 	mAlpha = 255;
     36         mBitmap = b;
     37         if (b != null) {
     38             mWidth = mBitmap.getWidth();
     39             mHeight = mBitmap.getHeight();
     40         } else {
     41             mWidth = mHeight = 0;
     42         }
     43     }
     44 
     45     @Override
     46     public void draw(Canvas canvas) {
     47         final Rect r = getBounds();
     48         // Draw the bitmap into the bounding rect
     49         canvas.drawBitmap(mBitmap, null, r, mPaint);
     50     }
     51 
     52     @Override
     53     public void setColorFilter(ColorFilter cf) {
     54         mPaint.setColorFilter(cf);
     55     }
     56 
     57     @Override
     58     public int getOpacity() {
     59         return PixelFormat.TRANSLUCENT;
     60     }
     61 
     62     @Override
     63     public void setAlpha(int alpha) {
     64         mAlpha = alpha;
     65         mPaint.setAlpha(alpha);
     66     }
     67 
     68     public void setFilterBitmap(boolean filterBitmap) {
     69         mPaint.setFilterBitmap(filterBitmap);
     70     }
     71 
     72     public int getAlpha() {
     73         return mAlpha;
     74     }
     75 
     76     @Override
     77     public int getIntrinsicWidth() {
     78         return mWidth;
     79     }
     80 
     81     @Override
     82     public int getIntrinsicHeight() {
     83         return mHeight;
     84     }
     85 
     86     @Override
     87     public int getMinimumWidth() {
     88         return mWidth;
     89     }
     90 
     91     @Override
     92     public int getMinimumHeight() {
     93         return mHeight;
     94     }
     95 
     96     public void setBitmap(Bitmap b) {
     97         mBitmap = b;
     98         if (b != null) {
     99             mWidth = mBitmap.getWidth();
    100             mHeight = mBitmap.getHeight();
    101         } else {
    102             mWidth = mHeight = 0;
    103         }
    104     }
    105 
    106     public Bitmap getBitmap() {
    107         return mBitmap;
    108     }
    109 }
    110