From 0c77edd7499c1b296671c5cd9375dab502c381f7 Mon Sep 17 00:00:00 2001
From: Vladimir Chtchetkine <vchtchetkine@google.com>
Date: Tue, 15 May 2012 09:05:37 -0700
Subject: Send ACK messages to emulator on FB update events.

This is device-side improvement to FB update protocol. This change allows the emulator
not to send new FB update until device has fully processed the previous one.

Change-Id: Ib1aa66359e3c8b52e3ed00b037ced4adf59534dc
---
 .../android/tools/sdkcontroller/activities/MultiTouchActivity.java    | 1 +
 .../com/android/tools/sdkcontroller/handlers/MultiTouchChannel.java   | 1 +
 .../src/com/android/tools/sdkcontroller/lib/ProtocolConstants.java    | 4 ++++
 3 files changed, 6 insertions(+)

(limited to 'apps')

diff --git a/apps/SdkController/src/com/android/tools/sdkcontroller/activities/MultiTouchActivity.java b/apps/SdkController/src/com/android/tools/sdkcontroller/activities/MultiTouchActivity.java
index 06b29f1..c0079d9 100755
--- a/apps/SdkController/src/com/android/tools/sdkcontroller/activities/MultiTouchActivity.java
+++ b/apps/SdkController/src/com/android/tools/sdkcontroller/activities/MultiTouchActivity.java
@@ -246,6 +246,7 @@ public class MultiTouchActivity extends BaseBindingActivity
             break;
         case MultiTouchChannel.EVENT_FRAME_BUFFER:
             onFrameBuffer(((ByteBuffer) msg.obj).array());
+            mHandler.postMessage(ProtocolConstants.MT_FB_HANDLED, (byte[]) null);
             break;
         }
         return true; // we consumed this message
diff --git a/apps/SdkController/src/com/android/tools/sdkcontroller/handlers/MultiTouchChannel.java b/apps/SdkController/src/com/android/tools/sdkcontroller/handlers/MultiTouchChannel.java
index fc70ae1..522a06e 100755
--- a/apps/SdkController/src/com/android/tools/sdkcontroller/handlers/MultiTouchChannel.java
+++ b/apps/SdkController/src/com/android/tools/sdkcontroller/handlers/MultiTouchChannel.java
@@ -109,6 +109,7 @@ public class MultiTouchChannel extends Channel {
                 Message msg = Message.obtain();
                 msg.what = EVENT_FRAME_BUFFER;
                 msg.obj = msg_data;
+                postMessage(ProtocolConstants.MT_FB_ACK, (byte[]) null);
                 notifyUiHandlers(msg);
                 break;
 
diff --git a/apps/SdkController/src/com/android/tools/sdkcontroller/lib/ProtocolConstants.java b/apps/SdkController/src/com/android/tools/sdkcontroller/lib/ProtocolConstants.java
index b4c6593..32abf2b 100644
--- a/apps/SdkController/src/com/android/tools/sdkcontroller/lib/ProtocolConstants.java
+++ b/apps/SdkController/src/com/android/tools/sdkcontroller/lib/ProtocolConstants.java
@@ -120,6 +120,10 @@ public final class ProtocolConstants {
     public static final int MT_POINTER_UP = 5;
     /** Sends framebuffer update. */
     public static final int MT_FB_UPDATE = 6;
+    /** Frame buffer update has been received. */
+    public static final int MT_FB_ACK = 7;
+    /** Frame buffer update has been handled. */
+    public static final int MT_FB_HANDLED = 8;
     /** Size of an event entry in the touch event message to the emulator. */
     public static final int MT_EVENT_ENTRY_SIZE = 16;
 
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