1aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu/* 2aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * Copyright (C) 2017 The Android Open Source Project 3aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * 4aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * Licensed under the Apache License, Version 2.0 (the "License"); 5aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * you may not use this file except in compliance with the License. 6aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * You may obtain a copy of the License at 7aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * 8aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * http://www.apache.org/licenses/LICENSE-2.0 9aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * 10aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * Unless required by applicable law or agreed to in writing, software 11aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * distributed under the License is distributed on an "AS IS" BASIS, 12aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * See the License for the specific language governing permissions and 14aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu * limitations under the License. 15aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu */ 16aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu 17aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu#include "HWComposerBufferCache.h" 18aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu 19aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu#include <gui/BufferQueue.h> 20aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu 21aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wunamespace android { 22aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu 23aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I WuHWComposerBufferCache::HWComposerBufferCache() 24aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu{ 25aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu mBuffers.reserve(BufferQueue::NUM_BUFFER_SLOTS); 26aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu} 27aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu 28aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wuvoid HWComposerBufferCache::getHwcBuffer(int slot, 29aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu const sp<GraphicBuffer>& buffer, 30aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu uint32_t* outSlot, sp<GraphicBuffer>* outBuffer) 31aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu{ 32aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu if (slot == BufferQueue::INVALID_BUFFER_SLOT || slot < 0) { 33aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu // default to slot 0 34aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu slot = 0; 35aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu } 36aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu 37aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu if (static_cast<size_t>(slot) >= mBuffers.size()) { 38aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu mBuffers.resize(slot + 1); 39aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu } 40aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu 41aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu *outSlot = slot; 42aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu 43aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu if (mBuffers[slot] == buffer) { 44aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu // already cached in HWC, skip sending the buffer 45aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu *outBuffer = nullptr; 46aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu } else { 47aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu *outBuffer = buffer; 48aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu 49aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu // update cache 50aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu mBuffers[slot] = buffer; 51aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu } 52aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu} 53aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu 54aaff73f92a2fcadda8c765eb9b02f2849418a873Chia-I Wu} // namespace android 55