src/com/android/car/settings/common/DrawableUtil.java

/*
 * Copyright (C) 2021 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 com.android.car.settings.common;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.Icon;

/** Contains utility functions to operate on Drawables. */
public class DrawableUtil {

    private DrawableUtil() {
    }

    /**
     * Create an {@link Icon} object from a {@link Drawable}.
     */
    public static Icon createIconFromDrawable(Drawable drawable) {
        return Icon.createWithBitmap(createBitmapFromDrawable(drawable));
    }

    /**
     * Create an {@link Bitmap} image from a {@link Drawable}.
     */
    public static Bitmap createBitmapFromDrawable(Drawable drawable) {
        Bitmap bitmap;
        if (drawable instanceof BitmapDrawable) {
            bitmap = ((BitmapDrawable) drawable).getBitmap();
        } else {
            int width = drawable.getIntrinsicWidth();
            int height = drawable.getIntrinsicHeight();
            bitmap = createBitmap(drawable,
                    width > 0 ? width : 1,
                    height > 0 ? height : 1);
        }
        return bitmap;
    }

    private static Bitmap createBitmap(Drawable drawable, int width, int height) {
        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);
        return bitmap;
    }
}