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

Commit 547010ff authored by Hyunyoung Song's avatar Hyunyoung Song
Browse files

Add LauncherIcons.AdaptiveIconDrawableWithShadow class to support shadow 

b/36088922

Test: Settings app
This utility class can be used to bake shadow in drawable level in
system ui surfaces such as Settings, Overview and ShareSheet.

Change-Id: Iaec867d9ce5b949380c1e5004b68269d1bbeacd4
parent b18296c8

core/java/android/util/LauncherIcons.java

0 → 100644
+113 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2017 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package android.util;



import android.content.Context;

import android.content.res.Resources;

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Matrix;

import android.graphics.Paint;

import android.graphics.PaintFlagsDrawFilter;

import android.graphics.Path;

import android.graphics.RectF;

import android.graphics.drawable.AdaptiveIconDrawable;

import android.graphics.drawable.BitmapDrawable;

import android.graphics.drawable.Drawable;



/**

 * Utility class to handle icon treatments (e.g., shadow generation) for the Launcher icons.

 * @hide

 */

public final class LauncherIcons {



    private final Paint mPaint = new Paint();

    private final Canvas mCanvas = new Canvas();



    private static final int KEY_SHADOW_ALPHA = 61;

    private static final int AMBIENT_SHADOW_ALPHA = 30;

    private static final float BLUR_FACTOR = 0.5f / 48;

    private int mShadowInset;

    private Bitmap mShadowBitmap;

    private int mIconSize;

    private Resources mRes;



    public LauncherIcons(Context context) {

        mRes = context.getResources();

        DisplayMetrics metrics = mRes.getDisplayMetrics();

        mShadowInset = (int) metrics.density / DisplayMetrics.DENSITY_DEFAULT;

        mCanvas.setDrawFilter(new PaintFlagsDrawFilter(Paint.DITHER_FLAG,

            Paint.FILTER_BITMAP_FLAG));

        mIconSize = (int) mRes.getDimensionPixelSize(android.R.dimen.app_icon_size);

    }



    /**

     * Draw the drawable into a bitmap.

     */

    public Bitmap createIconBitmap(Drawable icon) {

        final Bitmap bitmap = Bitmap.createBitmap(mIconSize, mIconSize, Bitmap.Config.ARGB_8888);

        mPaint.setAlpha(255);

        mCanvas.setBitmap(bitmap);

        int iconInset = 0;

        if (mShadowBitmap != null) {

            mCanvas.drawBitmap(mShadowBitmap, 0, 0, mPaint);

            iconInset = mShadowInset;

        }



        icon.setBounds(iconInset, iconInset, mIconSize - iconInset,

            mIconSize - iconInset);

        icon.draw(mCanvas);

        mCanvas.setBitmap(null);

        return bitmap;

    }



    public Drawable wrapIconDrawableWithShadow(Drawable drawable) {

        if (!(drawable instanceof AdaptiveIconDrawable)) {

            return drawable;

        }

        AdaptiveIconDrawable d =

            (AdaptiveIconDrawable) drawable.getConstantState().newDrawable().mutate();

        getShadowBitmap(d);

        Bitmap iconbitmap = createIconBitmap(d);

        return new BitmapDrawable(mRes, iconbitmap);

    }



    private Bitmap getShadowBitmap(AdaptiveIconDrawable d) {

        if (mShadowBitmap != null) {

            return mShadowBitmap;

        }



        int shadowSize = mIconSize - mShadowInset;

        mShadowBitmap = Bitmap.createBitmap(mIconSize, mIconSize, Bitmap.Config.ALPHA_8);

        mCanvas.setBitmap(mShadowBitmap);



        // Draw key shadow

        mPaint.setColor(Color.TRANSPARENT);

        float blur = BLUR_FACTOR * mIconSize;

        mPaint.setShadowLayer(blur, 0, mShadowInset, KEY_SHADOW_ALPHA << 24);

        d.setBounds(mShadowInset, mShadowInset, mIconSize - mShadowInset, mIconSize - mShadowInset);

        mCanvas.drawPath(d.getIconMask(), mPaint);



        // Draw ambient shadow

        mPaint.setShadowLayer(blur, 0, 0, AMBIENT_SHADOW_ALPHA << 24);

        d.setBounds(mShadowInset, 2 * mShadowInset, mIconSize - mShadowInset, mIconSize);

        mCanvas.drawPath(d.getIconMask(), mPaint);

        mPaint.clearShadowLayer();



        return mShadowBitmap;

    }

}

graphics/java/android/graphics/drawable/AdaptiveIconDrawable.java

+2 −0
Original line number Diff line number Diff line
@@ -218,6 +218,8 @@ public class AdaptiveIconDrawable extends Drawable implements Drawable.Callback 
    }



    /**

     * Only call this method after bound is set on this drawable.

     *

     * @return the mask path object used to clip the drawable

     */

    public Path getIconMask() {

packages/SystemUI/src/com/android/systemui/recents/misc/SystemServicesProxy.java

+5 −2
Original line number Diff line number Diff line
@@ -67,6 +67,7 @@ import android.os.UserHandle; 
import android.os.UserManager;

import android.provider.Settings;

import android.util.ArraySet;

import android.util.LauncherIcons;

import android.util.Log;

import android.util.MutableBoolean;

import android.view.Display;
@@ -142,6 +143,7 @@ public class SystemServicesProxy { 
    int mDummyThumbnailHeight;

    Paint mBgProtectionPaint;

    Canvas mBgProtectionCanvas;

    LauncherIcons mLauncherIcons;



    private final Handler mHandler = new H();
@@ -299,6 +301,7 @@ public class SystemServicesProxy { 
            Collections.addAll(sRecentsBlacklist,

                    res.getStringArray(R.array.recents_blacklist_array));

        }

        mLauncherIcons = new LauncherIcons(context);

    }



    /**
@@ -834,7 +837,7 @@ public class SystemServicesProxy { 
            return new ColorDrawable(0xFF666666);

        }



        Drawable icon = info.loadIcon(mPm);

        Drawable icon = mLauncherIcons.wrapIconDrawableWithShadow(info.loadIcon(mPm));

        return getBadgedIcon(icon, userId);

    }
@@ -850,7 +853,7 @@ public class SystemServicesProxy { 
            return new ColorDrawable(0xFF666666);

        }



        Drawable icon = appInfo.loadIcon(mPm);

        Drawable icon = mLauncherIcons.wrapIconDrawableWithShadow(appInfo.loadIcon(mPm));

        return getBadgedIcon(icon, userId);

    }