Disable hardware acceleration on Android

It serves no purpose and causes tearing.  Uploading the bitmap
to the GPU takes about as long as it does to incrementally
update the surface in software.

* java/AndroidManifest.xml.in: Disable hardware acceleration.
* java/org/gnu/emacs/EmacsActivity.java (EmacsActivity): Make
lastClosedMenu static.
* java/org/gnu/emacs/EmacsDialog.java (toAlertDialog): Enable
hardware acceleration within alert dialogs.
* java/org/gnu/emacs/EmacsSurfaceView.java (onDraw): Describe
why hardware acceleration is disabled.
* java/org/gnu/emacs/EmacsWindow.java (run): Remove redundant
call.

1 files changed, 13 insertions, 1 deletions

diff --git a/java/org/gnu/emacs/EmacsDialog.java b/java/org/gnu/emacs/EmacsDialog.java
index 5f48a9a5f9f..42455ed78f8 100644
--- a/java/org/gnu/emacs/EmacsDialog.java
+++ b/java/org/gnu/emacs/EmacsDialog.java
@@ -152,7 +152,7 @@ public final class EmacsDialog implements DialogInterface.OnDismissListener
   toAlertDialog (Context context)
   {
     AlertDialog dialog;
-    int size, styleId;
+    int size, styleId, flag;
     int[] attrs;
     EmacsButton button;
     EmacsDialogButtonLayout layout;
@@ -160,6 +160,7 @@ public final class EmacsDialog implements DialogInterface.OnDismissListener
     ViewGroup.LayoutParams layoutParams;
     Theme theme;
     TypedArray attributes;
+    Window window;
 
     size = buttons.size ();
     styleId = -1;
@@ -273,6 +274,17 @@ public final class EmacsDialog implements DialogInterface.OnDismissListener
 	  }
       }
 
+    /* Make sure the dialog is hardware accelerated.  Hardware
+       acceleration is disabled for dialogs by default, because they
+       aren't enabled in EmacsActivity either.  */
+
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
+      {
+	flag = WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED;
+	window = dialog.getWindow ();
+	window.addFlags (flag);
+      }
+
     return dialog;
   }