SF: Separate out render surface code
This creates a new class for the purpose of holding all the
functionality related to flipping the output display surface.
Test: atest libsurfaceflinger_unittest libcompositionengine_test
Bug: 121291683
Change-Id: I108ccb75f3cd6aa1204487b0aed7c67d9fe1b85f
diff --git a/libs/ui/Size.cpp b/libs/ui/Size.cpp
new file mode 100644
index 0000000..d2996d1
--- /dev/null
+++ b/libs/ui/Size.cpp
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2019 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 <ui/Size.h>
+
+namespace android::ui {
+
+const Size Size::INVALID{-1, -1};
+const Size Size::EMPTY{0, 0};
+
+} // namespace android::ui