1 /*
2  * Copyright 2023 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 "AlternatingImageStorage.h"
18 
19 namespace aidl::android::hardware::graphics::composer3::impl {
20 
getRotatingScratchBuffer(std::size_t neededSize,std::uint32_t imageIndex)21 uint8_t* AlternatingImageStorage::getRotatingScratchBuffer(std::size_t neededSize,
22                                                            std::uint32_t imageIndex) {
23     std::size_t totalNeededSize = neededSize * kNumScratchBufferPieces;
24     if (mScratchBuffer.size() < totalNeededSize) {
25         mScratchBuffer.resize(totalNeededSize);
26     }
27 
28     std::size_t bufferIndex = imageIndex % kNumScratchBufferPieces;
29     std::size_t bufferOffset = bufferIndex * neededSize;
30     return &mScratchBuffer[bufferOffset];
31 }
32 
getSpecialScratchBuffer(size_t neededSize)33 uint8_t* AlternatingImageStorage::getSpecialScratchBuffer(size_t neededSize) {
34     if (mSpecialScratchBuffer.size() < neededSize) {
35         mSpecialScratchBuffer.resize(neededSize);
36     }
37 
38     return &mSpecialScratchBuffer[0];
39 }
40 
41 }  // namespace aidl::android::hardware::graphics::composer3::impl
42