87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
/*
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* Copyright 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <ui/HdrCapabilities.h>
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namespace android {
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#if defined(__clang__)
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wundefined-reinterpret-cast"
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#endif
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size_t HdrCapabilities::getFlattenedSize() const {
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return sizeof(mMaxLuminance) +
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sizeof(mMaxAverageLuminance) +
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sizeof(mMinLuminance) +
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sizeof(int32_t) +
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mSupportedHdrTypes.size() * sizeof(ui::Hdr);
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}
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status_t HdrCapabilities::flatten(void* buffer, size_t size) const {
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if (size < getFlattenedSize()) {
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return NO_MEMORY;
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}
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int32_t* const buf = static_cast<int32_t*>(buffer);
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reinterpret_cast<float&>(buf[0]) = mMaxLuminance;
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reinterpret_cast<float&>(buf[1]) = mMaxAverageLuminance;
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reinterpret_cast<float&>(buf[2]) = mMinLuminance;
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buf[3] = static_cast<int32_t>(mSupportedHdrTypes.size());
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for (size_t i = 0, c = mSupportedHdrTypes.size(); i < c; ++i) {
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buf[4 + i] = static_cast<int32_t>(mSupportedHdrTypes[i]);
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}
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return NO_ERROR;
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}
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status_t HdrCapabilities::unflatten(void const* buffer, size_t size) {
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size_t minSize = sizeof(mMaxLuminance) +
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sizeof(mMaxAverageLuminance) +
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sizeof(mMinLuminance) +
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sizeof(int32_t);
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if (size < minSize) {
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return NO_MEMORY;
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}
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int32_t const * const buf = static_cast<int32_t const *>(buffer);
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const size_t itemCount = size_t(buf[3]);
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// check the buffer is large enough
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if (size < minSize + itemCount * sizeof(int32_t)) {
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return BAD_VALUE;
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}
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mMaxLuminance = reinterpret_cast<float const&>(buf[0]);
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mMaxAverageLuminance = reinterpret_cast<float const&>(buf[1]);
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mMinLuminance = reinterpret_cast<float const&>(buf[2]);
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if (itemCount) {
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mSupportedHdrTypes.resize(itemCount);
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for (size_t i = 0; i < itemCount; ++i) {
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mSupportedHdrTypes[i] = static_cast<ui::Hdr>(buf[4 + i]);
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}
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}
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return NO_ERROR;
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}
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#if defined(__clang__)
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#pragma clang diagnostic pop
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#endif
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} // namespace android
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