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
30
31size_t HdrCapabilities::getFlattenedSize() const {
32    return  sizeof(mMaxLuminance) +
33            sizeof(mMaxAverageLuminance) +
34            sizeof(mMinLuminance) +
35            sizeof(int32_t) +
36            mSupportedHdrTypes.size() * sizeof(int32_t);
37}
38
39status_t HdrCapabilities::flatten(void* buffer, size_t size) const {
40
41    if (size < getFlattenedSize()) {
42        return NO_MEMORY;
43    }
44
45    int32_t* const buf = static_cast<int32_t*>(buffer);
46    reinterpret_cast<float&>(buf[0]) = mMaxLuminance;
47    reinterpret_cast<float&>(buf[1]) = mMaxAverageLuminance;
48    reinterpret_cast<float&>(buf[2]) = mMinLuminance;
49    buf[3] = static_cast<int32_t>(mSupportedHdrTypes.size());
50    for (size_t i = 0, c = mSupportedHdrTypes.size(); i < c; ++i) {
51        buf[4 + i] = mSupportedHdrTypes[i];
52    }
53    return NO_ERROR;
54}
55
56status_t HdrCapabilities::unflatten(void const* buffer, size_t size) {
57
58    size_t minSize = sizeof(mMaxLuminance) +
59                     sizeof(mMaxAverageLuminance) +
60                     sizeof(mMinLuminance) +
61                     sizeof(int32_t);
62
63    if (size < minSize) {
64        return NO_MEMORY;
65    }
66
67    int32_t const * const buf = static_cast<int32_t const *>(buffer);
68    const size_t itemCount = size_t(buf[3]);
69
70    // check the buffer is large enough
71    if (size < minSize + itemCount * sizeof(int32_t)) {
72        return BAD_VALUE;
73    }
74
75    mMaxLuminance        = reinterpret_cast<float const&>(buf[0]);
76    mMaxAverageLuminance = reinterpret_cast<float const&>(buf[1]);
77    mMinLuminance        = reinterpret_cast<float const&>(buf[2]);
78    if (itemCount) {
79        mSupportedHdrTypes.reserve(itemCount);
80        for (size_t i = 0; i < itemCount; ++i) {
81            mSupportedHdrTypes[i] = buf[4 + i];
82        }
83    }
84    return NO_ERROR;
85}
86
87#if defined(__clang__)
88#pragma clang diagnostic pop
89#endif
90
91} // namespace android
92