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