LayerState.cpp revision 90ac799241f077a7b7e6c1875fd933864c8dd2a7 
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 <gui/ISurfaceComposerClient.h>
20#include <private/gui/LayerState.h>
21
22namespace android {
23
24status_t layer_state_t::write(Parcel& output) const
25{
26    status_t err;
27
28    size_t len = transparentRegion.write(NULL, 0);
29    err = output.writeInt32(len);
30    if (err < NO_ERROR) return err;
31
32    void* buf = output.writeInplace(len);
33    if (buf == NULL) return NO_MEMORY;
34
35    err = transparentRegion.write(buf, len);
36    if (err < NO_ERROR) return err;
37
38    // NOTE: regions are at the end of the structure
39    size_t size = sizeof(layer_state_t);
40    size -= sizeof(transparentRegion);
41    err = output.write(this, size);
42    return err;
43}
44
45status_t layer_state_t::read(const Parcel& input)
46{
47    status_t err;
48    size_t len = input.readInt32();
49    void const* buf = input.readInplace(len);
50    if (buf == NULL) return NO_MEMORY;
51
52    err = transparentRegion.read(buf);
53    if (err < NO_ERROR) return err;
54
55    // NOTE: regions are at the end of the structure
56    size_t size = sizeof(layer_state_t);
57    size -= sizeof(transparentRegion);
58    input.read(this, size);
59    return NO_ERROR;
60}
61
62status_t ComposerState::write(Parcel& output) const {
63    output.writeStrongBinder(client->asBinder());
64    return state.write(output);
65}
66
67status_t ComposerState::read(const Parcel& input) {
68    client = interface_cast<ISurfaceComposerClient>(input.readStrongBinder());
69    return state.read(input);
70}
71
72}; // namespace android
73