LayerState.cpp revision d87f162026454f5a3e6437ed0c9ef51651a6b939 
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#include <utils/Errors.h>
18#include <binder/Parcel.h>
19#include <private/surfaceflinger/LayerState.h>
20
21namespace android {
22
23status_t layer_state_t::write(Parcel& output) const
24{
25    status_t err;
26
27    size_t len = transparentRegion.write(NULL, 0);
28    err = output.writeInt32(len);
29    if (err < NO_ERROR) return err;
30
31    void* buf = output.writeInplace(len);
32    if (buf == NULL) return NO_MEMORY;
33
34    err = transparentRegion.write(buf, len);
35    if (err < NO_ERROR) return err;
36
37    // NOTE: regions are at the end of the structure
38    size_t size = sizeof(layer_state_t);
39    size -= sizeof(transparentRegion);
40    err = output.write(this, size);
41    return err;
42}
43
44status_t layer_state_t::read(const Parcel& input)
45{
46    status_t err;
47    size_t len = input.readInt32();
48    void const* buf = input.readInplace(len);
49    if (buf == NULL) return NO_MEMORY;
50
51    err = transparentRegion.read(buf);
52    if (err < NO_ERROR) return err;
53
54    // NOTE: regions are at the end of the structure
55    size_t size = sizeof(layer_state_t);
56    size -= sizeof(transparentRegion);
57    input.read(this, size);
58    return NO_ERROR;
59}
60
61}; // namespace android
62