SF: Move HWComposerBufferCache in to CompositionEngine
This simply moves DisplayHardware/HWComposerBufferCache.* to
CompositionEngine/HwcBufferCache.*, adjusting the existing code to
reference the moved file and namespace.
This is a prelude to moving the layerBE state into CompositionEngine.
Test: atest libsurfaceflinger_unittest libcompositionengine_test
Bug: 121291683
Change-Id: Id1e907963d0453ec7beea285ab384a963c356f89
diff --git a/services/surfaceflinger/CompositionEngine/src/HwcBufferCache.cpp b/services/surfaceflinger/CompositionEngine/src/HwcBufferCache.cpp
new file mode 100644
index 0000000..6f340b9
--- /dev/null
+++ b/services/surfaceflinger/CompositionEngine/src/HwcBufferCache.cpp
@@ -0,0 +1,51 @@
+/*
+ * 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 <compositionengine/impl/HwcBufferCache.h>
+#include <gui/BufferQueue.h>
+#include <ui/GraphicBuffer.h>
+
+namespace android::compositionengine::impl {
+
+HwcBufferCache::HwcBufferCache() {
+ mBuffers.reserve(BufferQueue::NUM_BUFFER_SLOTS);
+}
+
+void HwcBufferCache::getHwcBuffer(int slot, const sp<GraphicBuffer>& buffer, uint32_t* outSlot,
+ sp<GraphicBuffer>* outBuffer) {
+ 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;
+ }
+}
+
+} // namespace android::compositionengine::impl