Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b375632c authored by Dianne Hackborn's avatar Dianne Hackborn
Browse files

Don't use HW accel drawing in lock screen on lower-end devices. 

This saves about 8MB in the system process because we don't need
to do HW accelerated drawing there anymore.

Change-Id: Ieaf72fe772536e12d10cf129d9338ca9fce6a6d4
parent 8a5c6617

core/java/android/app/ActivityManager.java

+29 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ package android.app; 


import com.android.internal.app.IUsageStats;

import com.android.internal.os.PkgUsageStats;

import com.android.internal.util.MemInfoReader;



import android.content.ComponentName;

import android.content.Context;
@@ -28,6 +29,7 @@ import android.content.pm.IPackageDataObserver; 
import android.content.res.Configuration;

import android.content.res.Resources;

import android.graphics.Bitmap;

import android.graphics.Point;

import android.os.Debug;

import android.os.Handler;

import android.os.Parcel;
@@ -38,6 +40,8 @@ import android.os.SystemProperties; 
import android.text.TextUtils;

import android.util.DisplayMetrics;

import android.util.Log;

import android.util.Slog;

import android.view.Display;



import java.util.ArrayList;

import java.util.HashMap;
@@ -205,6 +209,31 @@ public class ActivityManager { 
        return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1));

    }

    

    /**

     * Used by persistent processes to determine if they are running on a

     * higher-end device so should be okay using hardware drawing acceleration

     * (which tends to consume a lot more RAM).

     * @hide

     */

    static public boolean isHighEndGfx(Display display) {

        MemInfoReader reader = new MemInfoReader();

        reader.readMemInfo();

        if (reader.getTotalSize() >= (512*1024*1024)) {

            // If the device has at least 512MB RAM available to the kernel,

            // we can afford the overhead of graphics acceleration.

            return true;

        }

        Point p = new Point();

        display.getRealSize(p);

        int pixels = p.x * p.y;

        if (pixels >= (1024*600)) {

            // If this is a sufficiently large screen, then there are enough

            // pixels on it that we'd really like to use hw drawing.

            return true;

        }

        return false;

    }



    /**

     * Information you can retrieve about tasks that the user has most recently

     * started or visited.

policy/src/com/android/internal/policy/impl/KeyguardViewManager.java

+6 −2
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ package com.android.internal.policy.impl; 


import com.android.internal.R;



import android.app.ActivityManager;

import android.content.Context;

import android.content.pm.ActivityInfo;

import android.content.res.Resources;
@@ -107,13 +108,16 @@ public class KeyguardViewManager implements KeyguardWindowController { 
            int flags = WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN

                    | WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER

                    | WindowManager.LayoutParams.FLAG_KEEP_SURFACE_WHILE_ANIMATING

                    | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED

                    | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED_SYSTEM

                    /*| WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN

                    | WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR*/ ;

            if (!mNeedsInput) {

                flags |= WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM;

            }

            if (ActivityManager.isHighEndGfx(((WindowManager)mContext.getSystemService(

                    Context.WINDOW_SERVICE)).getDefaultDisplay())) {

                flags |= WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED

                        | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED_SYSTEM;

            }

            WindowManager.LayoutParams lp = new WindowManager.LayoutParams(

                    stretch, stretch, WindowManager.LayoutParams.TYPE_KEYGUARD,

                    flags, PixelFormat.TRANSLUCENT);