| /* | |
| * Copyright (C) 2017 The Android Open Source Project | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); | |
| * you may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software | |
| * distributed under the License is distributed on an "AS IS" BASIS, | |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| * See the License for the specific language governing permissions and | |
| * limitations under the License. | |
| */ | |
| #include "HWComposerBufferCache.h" | |
| #include <gui/BufferQueue.h> | |
| namespace android { | |
| HWComposerBufferCache::HWComposerBufferCache() | |
| { | |
| mBuffers.reserve(BufferQueue::NUM_BUFFER_SLOTS); | |
| } | |
| void HWComposerBufferCache::getHwcBuffer(int slot, | |
| const sp<GraphicBuffer>& buffer, | |
| uint32_t* outSlot, sp<GraphicBuffer>* outBuffer) | |
| { | |
| #ifdef BYPASS_IHWC | |
| *outSlot = slot; | |
| *outBuffer = buffer; | |
| #else | |
| if (slot == BufferQueue::INVALID_BUFFER_SLOT || slot < 0) { | |
| // default to slot 0 | |
| slot = 0; | |
| } | |
| if (static_cast<size_t>(slot) >= mBuffers.size()) { | |
| mBuffers.resize(slot + 1); | |
| } | |
| *outSlot = slot; | |
| if (mBuffers[slot] == buffer) { | |
| // already cached in HWC, skip sending the buffer | |
| *outBuffer = nullptr; | |
| } else { | |
| *outBuffer = buffer; | |
| // update cache | |
| mBuffers[slot] = buffer; | |
| } | |
| #endif | |
| } | |
| } // namespace android |