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
17package com.android.printspooler.util;
18
19import android.graphics.Bitmap;
20import 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 */
27public final class BitmapSerializeUtils {
28
29    static {
30        System.loadLibrary("printspooler_jni");
31    }
32
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     */
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     */
53    public static void writeBitmapPixels(Bitmap bitmap, ParcelFileDescriptor destination) {
54        nativeWriteBitmapPixels(bitmap, destination.getFd());
55    }
56
57    private static native void nativeReadBitmapPixels(Bitmap bitmap, int fd);
58
59    private static native void nativeWriteBitmapPixels(Bitmap bitmap, int fd);
60}
61