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/*
* Copyright (C) 2019 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.wallpaper.util;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.util.Log;
import com.google.android.renderscript.Toolkit;
/**
* Class with different bitmap processors to apply to bitmaps
*/
public final class BitmapProcessor {
private static final String TAG = "BitmapProcessor";
private static final float BLUR_RADIUS = 20f;
private static final int DOWNSAMPLE = 5;
private BitmapProcessor() {
}
/**
* Function that blurs the content of a bitmap.
*
* @param context the Application Context
* @param bitmap the bitmap we want to blur.
* @param outWidth the end width of the blurred bitmap.
* @param outHeight the end height of the blurred bitmap.
* @return the blurred bitmap.
*/
public static Bitmap blur(Context context, Bitmap bitmap, int outWidth,
int outHeight) {
Bitmap inBitmap = null;
try {
Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
WallpaperCropUtils.fitToSize(rect, outWidth / DOWNSAMPLE, outHeight / DOWNSAMPLE);
inBitmap = Bitmap.createScaledBitmap(bitmap, rect.width(), rect.height(),
true /* filter */);
// Render script blurs only support ARGB_8888, we need a conversion if we got a
// different bitmap config.
if (inBitmap.getConfig() != Bitmap.Config.ARGB_8888) {
Bitmap oldIn = inBitmap;
inBitmap = oldIn.copy(Bitmap.Config.ARGB_8888, false /* isMutable */);
oldIn.recycle();
}
return Toolkit.INSTANCE.blur(inBitmap, (int) BLUR_RADIUS);
} catch (IllegalArgumentException ex) {
Log.e(TAG, "error while blurring bitmap", ex);
} finally {
if (inBitmap != null) {
inBitmap.recycle();
}
}
return null;
}
}
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