Add support for sending VSYNC events to the framework
use gui/DisplayEvent to receive the events. Events are
dispatched through a unix pipe, so the API is compatible
with utils/Looper. see gui/DisplayEvent.h for more info.
Bug: 1475048
Change-Id: Ia720f64d1b950328b47b22c6a86042e481d35f09
diff --git a/libs/gui/IDisplayEventConnection.cpp b/libs/gui/IDisplayEventConnection.cpp
new file mode 100644
index 0000000..44127fb
--- /dev/null
+++ b/libs/gui/IDisplayEventConnection.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2011 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 <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+#include <utils/Timers.h>
+
+#include <binder/Parcel.h>
+#include <binder/IInterface.h>
+
+#include <gui/IDisplayEventConnection.h>
+#include <gui/BitTube.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+enum {
+ GET_DATA_CHANNEL = IBinder::FIRST_CALL_TRANSACTION,
+};
+
+class BpDisplayEventConnection : public BpInterface<IDisplayEventConnection>
+{
+public:
+ BpDisplayEventConnection(const sp<IBinder>& impl)
+ : BpInterface<IDisplayEventConnection>(impl)
+ {
+ }
+
+ virtual sp<BitTube> getDataChannel() const
+ {
+ Parcel data, reply;
+ data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
+ remote()->transact(GET_DATA_CHANNEL, data, &reply);
+ return new BitTube(reply);
+ }
+};
+
+IMPLEMENT_META_INTERFACE(DisplayEventConnection, "android.gui.DisplayEventConnection");
+
+// ----------------------------------------------------------------------------
+
+status_t BnDisplayEventConnection::onTransact(
+ uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+ switch(code) {
+ case GET_DATA_CHANNEL: {
+ CHECK_INTERFACE(IDisplayEventConnection, data, reply);
+ sp<BitTube> channel(getDataChannel());
+ channel->writeToParcel(reply);
+ return NO_ERROR;
+ } break;
+ }
+ return BBinder::onTransact(code, data, reply, flags);
+}
+
+// ----------------------------------------------------------------------------
+}; // namespace android