Add aboutToChange to GLRootView.

This allow user to notify GLRootView to expect a size change in a near furture.

Change-Id: I8ea2a00c90f0d25c06ee9b292fa9defa2f379abd
Fix: 2591831

2 files changed, 15 insertions, 7 deletions

diff --git a/src/com/android/camera/VideoCamera.java b/src/com/android/camera/VideoCamera.java
index 1fdb842..74e36b3 100644
--- a/src/com/android/camera/VideoCamera.java
+++ b/src/com/android/camera/VideoCamera.java
@@ -16,6 +16,13 @@
 
 package com.android.camera;
 
+import com.android.camera.gallery.IImage;
+import com.android.camera.gallery.IImageList;
+import com.android.camera.ui.CamcorderHeadUpDisplay;
+import com.android.camera.ui.GLRootView;
+import com.android.camera.ui.GLView;
+import com.android.camera.ui.HeadUpDisplay;
+
 import android.content.ActivityNotFoundException;
 import android.content.BroadcastReceiver;
 import android.content.ContentResolver;
@@ -62,13 +69,6 @@ import android.widget.ImageView;
 import android.widget.TextView;
 import android.widget.Toast;
 
-import com.android.camera.gallery.IImage;
-import com.android.camera.gallery.IImageList;
-import com.android.camera.ui.CamcorderHeadUpDisplay;
-import com.android.camera.ui.GLRootView;
-import com.android.camera.ui.GLView;
-import com.android.camera.ui.HeadUpDisplay;
-
 import java.io.File;
 import java.io.FileDescriptor;
 import java.io.IOException;
@@ -526,6 +526,7 @@ public class VideoCamera extends NoSearchActivity
     }
 
     private void resizeForPreviewAspectRatio() {
+        if (mGLRootView != null) mGLRootView.aboutToChangeSize();
         mPreviewFrameLayout.setAspectRatio(
                 (double) mProfile.videoFrameWidth / mProfile.videoFrameHeight);
     }
diff --git a/src/com/android/camera/ui/GLRootView.java b/src/com/android/camera/ui/GLRootView.java
index 7baeb5d..8b1f947 100644
--- a/src/com/android/camera/ui/GLRootView.java
+++ b/src/com/android/camera/ui/GLRootView.java
@@ -555,6 +555,13 @@ public class GLRootView extends GLSurfaceView
         return mLooper;
     }
 
+    // We expect the size will change soon. Please reference onSizeChanged for
+    // more details.
+    public void aboutToChangeSize() {
+        mFirstWidth = 0;
+        mFirstHeight = 0;
+    }
+
     // After the device goes to sleep and back, the lock screen may cause the
     // orientation to become portrait. So we will allocate a surface with a
     // different size. This causes problem when we try to allocate the surface