1/*
2 * Copyright 2016 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 <ui/HdrCapabilities.h>
18
19namespace android {
20
21#if defined(__clang__)
22#pragma clang diagnostic push
23#pragma clang diagnostic ignored "-Wundefined-reinterpret-cast"
24#endif
25
26HdrCapabilities::~HdrCapabilities() = default;
27HdrCapabilities::HdrCapabilities(HdrCapabilities&& other) = default;
28HdrCapabilities& HdrCapabilities::operator=(HdrCapabilities&& other) = default;
29
30size_t HdrCapabilities::getFlattenedSize() const {
31    return  sizeof(mMaxLuminance) +
32            sizeof(mMaxAverageLuminance) +
33            sizeof(mMinLuminance) +
34            sizeof(int32_t) +
35            mSupportedHdrTypes.size() * sizeof(ui::Hdr);
36}
37
38status_t HdrCapabilities::flatten(void* buffer, size_t size) const {
39
40    if (size < getFlattenedSize()) {
41        return NO_MEMORY;
42    }
43
44    int32_t* const buf = static_cast<int32_t*>(buffer);
45    reinterpret_cast<float&>(buf[0]) = mMaxLuminance;
46    reinterpret_cast<float&>(buf[1]) = mMaxAverageLuminance;
47    reinterpret_cast<float&>(buf[2]) = mMinLuminance;
48    buf[3] = static_cast<int32_t>(mSupportedHdrTypes.size());
49    for (size_t i = 0, c = mSupportedHdrTypes.size(); i < c; ++i) {
50        buf[4 + i] = static_cast<int32_t>(mSupportedHdrTypes[i]);
51    }
52    return NO_ERROR;
53}
54
55status_t HdrCapabilities::unflatten(void const* buffer, size_t size) {
56
57    size_t minSize = sizeof(mMaxLuminance) +
58                     sizeof(mMaxAverageLuminance) +
59                     sizeof(mMinLuminance) +
60                     sizeof(int32_t);
61
62    if (size < minSize) {
63        return NO_MEMORY;
64    }
65
66    int32_t const * const buf = static_cast<int32_t const *>(buffer);
67    const size_t itemCount = size_t(buf[3]);
68
69    // check the buffer is large enough
70    if (size < minSize + itemCount * sizeof(int32_t)) {
71        return BAD_VALUE;
72    }
73
74    mMaxLuminance        = reinterpret_cast<float const&>(buf[0]);
75    mMaxAverageLuminance = reinterpret_cast<float const&>(buf[1]);
76    mMinLuminance        = reinterpret_cast<float const&>(buf[2]);
77    if (itemCount) {
78        mSupportedHdrTypes.resize(itemCount);
79        for (size_t i = 0; i < itemCount; ++i) {
80            mSupportedHdrTypes[i] = static_cast<ui::Hdr>(buf[4 + i]);
81        }
82    }
83    return NO_ERROR;
84}
85
86#if defined(__clang__)
87#pragma clang diagnostic pop
88#endif
89
90} // namespace android
91