Improve the VSYNC api a bit.
- add the ability to set the vsync delivery rate, when the rate is
set to N>1 (ie: receive every N vsync), SF process' is woken up for
all of vsync, but clients only see the every N events.
- add the concept of one-shot vsync events, with a call-back
to request the next one. currently the call-back is a binder IPC.
Change-Id: I09f71df0b0ba0d88ed997645e2e2497d553c9a1b
diff --git a/libs/gui/IDisplayEventConnection.cpp b/libs/gui/IDisplayEventConnection.cpp
index 44127fb..887d176 100644
--- a/libs/gui/IDisplayEventConnection.cpp
+++ b/libs/gui/IDisplayEventConnection.cpp
@@ -32,6 +32,8 @@
enum {
GET_DATA_CHANNEL = IBinder::FIRST_CALL_TRANSACTION,
+ SET_VSYNC_RATE,
+ REQUEST_NEXT_VSYNC
};
class BpDisplayEventConnection : public BpInterface<IDisplayEventConnection>
@@ -49,6 +51,19 @@
remote()->transact(GET_DATA_CHANNEL, data, &reply);
return new BitTube(reply);
}
+
+ virtual void setVsyncRate(uint32_t count) {
+ Parcel data, reply;
+ data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
+ data.writeInt32(count);
+ remote()->transact(SET_VSYNC_RATE, data, &reply);
+ }
+
+ virtual void requestNextVsync() {
+ Parcel data, reply;
+ data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
+ remote()->transact(REQUEST_NEXT_VSYNC, data, &reply, IBinder::FLAG_ONEWAY);
+ }
};
IMPLEMENT_META_INTERFACE(DisplayEventConnection, "android.gui.DisplayEventConnection");
@@ -65,6 +80,16 @@
channel->writeToParcel(reply);
return NO_ERROR;
} break;
+ case SET_VSYNC_RATE: {
+ CHECK_INTERFACE(IDisplayEventConnection, data, reply);
+ setVsyncRate(data.readInt32());
+ return NO_ERROR;
+ } break;
+ case REQUEST_NEXT_VSYNC: {
+ CHECK_INTERFACE(IDisplayEventConnection, data, reply);
+ requestNextVsync();
+ return NO_ERROR;
+ } break;
}
return BBinder::onTransact(code, data, reply, flags);
}