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 19 namespace android { 20 21 #if defined(__clang__) 22 #pragma clang diagnostic push 23 #pragma clang diagnostic ignored "-Wundefined-reinterpret-cast" 24 #endif 25 26 HdrCapabilities::~HdrCapabilities() = default; 27 HdrCapabilities::HdrCapabilities(HdrCapabilities&& other) = default; 28 HdrCapabilities& HdrCapabilities::operator=(HdrCapabilities&& other) = default; 29 30 31 size_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 39 status_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 56 status_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.resize(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
