1 /*
2  * Copyright (C) 2014 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.printspooler.util;
18 
19 import android.graphics.Bitmap;
20 import android.os.ParcelFileDescriptor;
21 
22 /**
23  * Helper for serialization of bitmaps in the very specific
24  * use case of having the same bitmap on both ends and just
25  * marshaling the pixels from one side to the other.
26  */
27 public final class BitmapSerializeUtils {
28 
29     static {
30         System.loadLibrary("printspooler_jni");
31     }
32 
BitmapSerializeUtils()33     private BitmapSerializeUtils() {
34         /* do nothing */
35     }
36 
37     /**
38      * Reads a bitmap pixels from a file descriptor.
39      *
40      * @param bitmap A bitmap whose pixels to populate.
41      * @param source The source file descriptor.
42      */
readBitmapPixels(Bitmap bitmap, ParcelFileDescriptor source)43     public static void readBitmapPixels(Bitmap bitmap, ParcelFileDescriptor source) {
44         nativeReadBitmapPixels(bitmap, source.getFd());
45     }
46 
47     /**
48      * Writes a bitmap pixels to a file descriptor.
49      *
50      * @param bitmap The bitmap.
51      * @param destination The destination file descriptor.
52      */
writeBitmapPixels(Bitmap bitmap, ParcelFileDescriptor destination)53     public static void writeBitmapPixels(Bitmap bitmap, ParcelFileDescriptor destination) {
54         nativeWriteBitmapPixels(bitmap, destination.getFd());
55     }
56 
nativeReadBitmapPixels(Bitmap bitmap, int fd)57     private static native void nativeReadBitmapPixels(Bitmap bitmap, int fd);
58 
nativeWriteBitmapPixels(Bitmap bitmap, int fd)59     private static native void nativeWriteBitmapPixels(Bitmap bitmap, int fd);
60 }
61