SurfaceFlinger: Add "Abstract" Layer type.

Add an Abstract Layer type which exists only to be a parent. We
will use this to more cleanly represent the various hierarchy Layers
from the WM and for an upcoming screenshot rework.

Bug: 72760590
Test: Existing tests pass
Change-Id: Icd19ab0a467585660a95ae37b9c5dd4b8106da9d

1 files changed, 39 insertions, 0 deletions

diff --git a/services/surfaceflinger/ContainerLayer.cpp b/services/surfaceflinger/ContainerLayer.cpp
new file mode 100644
index 0000000000..2f89cc1d76
--- /dev/null
+++ b/services/surfaceflinger/ContainerLayer.cpp
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2018 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.
+ */
+
+// #define LOG_NDEBUG 0
+#undef LOG_TAG
+#define LOG_TAG "AbstractLayer"
+
+#include "AbstractLayer.h"
+
+namespace android {
+
+AbstractLayer::AbstractLayer(SurfaceFlinger* flinger, const sp<Client>& client, const String8& name,
+                             uint32_t w, uint32_t h, uint32_t flags)
+      : Layer(flinger, client, name, w, h, flags) {
+    mDrawingState = mCurrentState;
+}
+
+void AbstractLayer::onDraw(const RenderArea&, const Region& /* clip */, bool) const {}
+
+bool AbstractLayer::isVisible() const {
+    return !isHiddenByPolicy();
+}
+
+void AbstractLayer::setPerFrameData(const sp<const DisplayDevice>&) {}
+
+} // namespace android