From 38ed7d7701514ee7127d0430e952930854608c4f Mon Sep 17 00:00:00 2001
From: Mitsuru Oshima <oshima@google.com>
Date: Tue, 21 Jul 2009 14:39:34 -0700
Subject: [PATCH] * Adjust canvas size under compatibility mode.

---
 core/java/android/view/Surface.java     | 23 ++++++++++++++++++++++-
 core/java/android/view/SurfaceView.java |  6 ++++++
 core/java/android/view/ViewRoot.java    | 11 ++++++++---
 3 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/core/java/android/view/Surface.java b/core/java/android/view/Surface.java
index 0178d635fb3bd..83c30e1855f96 100644
--- a/core/java/android/view/Surface.java
+++ b/core/java/android/view/Surface.java
@@ -19,6 +19,7 @@ package android.view;
 import android.graphics.*;
 import android.os.Parcelable;
 import android.os.Parcel;
+import android.util.DisplayMetrics;
 import android.util.Log;
 
 /**
@@ -131,6 +132,10 @@ public class Surface implements Parcelable {
     @SuppressWarnings("unused")
     private Canvas mCanvas;
 
+    // The display metrics used to provide the pseudo canvas size for applications
+    // running in compatibility mode. This is set to null for regular mode.
+    private DisplayMetrics mDisplayMetrics;
+
     /**
      * Exception thrown when a surface couldn't be created or resized
      */
@@ -167,7 +172,23 @@ public class Surface implements Parcelable {
      * {@hide}
      */
     public Surface() {
-        mCanvas = new Canvas();
+        mCanvas = new Canvas() {
+            @Override
+            public int getWidth() {
+                return mDisplayMetrics == null ? super.getWidth() : mDisplayMetrics.widthPixels;
+            }
+            @Override
+            public int getHeight() {
+                return mDisplayMetrics == null ? super.getHeight() : mDisplayMetrics.heightPixels;
+            }
+        };
+    }
+
+    /**
+     * Sets the display metrics used to provide canva's width/height in comaptibility mode.
+     */
+    void setCompatibleDisplayMetrics(DisplayMetrics metrics) {
+        mDisplayMetrics = metrics;
     }
     
     /**
diff --git a/core/java/android/view/SurfaceView.java b/core/java/android/view/SurfaceView.java
index fdc0c161ecb07..95bba97c75977 100644
--- a/core/java/android/view/SurfaceView.java
+++ b/core/java/android/view/SurfaceView.java
@@ -17,6 +17,7 @@
 package android.view;
 
 import android.content.Context;
+import android.content.res.Resources;
 import android.content.res.CompatibilityInfo.Translator;
 import android.graphics.Canvas;
 import android.graphics.PixelFormat;
@@ -301,6 +302,11 @@ public class SurfaceView extends View {
 
         float appScale = mTranslator == null ? 1.0f : mTranslator.applicationScale;
         
+        Resources res = getContext().getResources();
+        if (mTranslator != null || !res.getCompatibilityInfo().supportsScreen()) {
+            mSurface.setCompatibleDisplayMetrics(res.getDisplayMetrics());
+        }
+        
         int myWidth = mRequestedWidth;
         if (myWidth <= 0) myWidth = getWidth();
         int myHeight = mRequestedHeight;
diff --git a/core/java/android/view/ViewRoot.java b/core/java/android/view/ViewRoot.java
index 049b44f05f5f1..2f92b32e53f1c 100644
--- a/core/java/android/view/ViewRoot.java
+++ b/core/java/android/view/ViewRoot.java
@@ -42,6 +42,7 @@ import android.view.inputmethod.InputMethodManager;
 import android.widget.Scroller;
 import android.content.pm.PackageManager;
 import android.content.res.CompatibilityInfo;
+import android.content.res.Resources;
 import android.content.Context;
 import android.app.ActivityManagerNative;
 import android.Manifest;
@@ -386,10 +387,14 @@ public final class ViewRoot extends Handler implements ViewParent,
                 mView = view;
                 mWindowAttributes.copyFrom(attrs);
                 attrs = mWindowAttributes;
-
-                CompatibilityInfo compatibilityInfo =
-                        mView.getContext().getResources().getCompatibilityInfo();
+                Resources resources = mView.getContext().getResources();
+                CompatibilityInfo compatibilityInfo = resources.getCompatibilityInfo();
                 mTranslator = compatibilityInfo.getTranslator(attrs);
+
+                if (mTranslator != null || !compatibilityInfo.supportsScreen()) {
+                    mSurface.setCompatibleDisplayMetrics(resources.getDisplayMetrics());
+                }
+
                 boolean restore = false;
                 if (attrs != null && mTranslator != null) {
                     restore = true;