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 size_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 38 status_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 55 status_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
