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Add SupportBlurTransformation which uses RenderScript support library. (#125)
* Add SupportBlurTransformation which uses RenderScript support library. * Whoops -- forgot to change the imports. * Fix type.
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@ -11,6 +11,9 @@ android {
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versionCode "git rev-list origin/master --count".execute().text.toInteger()
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versionName VERSION_NAME
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renderscriptTargetApi TARGET_SDK_VERSION as int
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renderscriptSupportModeEnabled true
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consumerProguardFiles 'proguard-rules.txt'
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}
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}
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@ -0,0 +1,101 @@
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package jp.wasabeef.glide.transformations;
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/**
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* Copyright (C) 2018 Wasabeef
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.os.Build;
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import android.support.v8.renderscript.RSRuntimeException;
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import android.support.annotation.NonNull;
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import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
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import java.security.MessageDigest;
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import jp.wasabeef.glide.transformations.internal.FastBlur;
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import jp.wasabeef.glide.transformations.internal.SupportRSBlur;
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public class SupportBlurTransformation extends BitmapTransformation {
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private static final int VERSION = 1;
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private static final String ID =
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"jp.wasabeef.glide.transformations.SupportBlurTransformation." + VERSION;
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private static final byte[] ID_BYTES = ID.getBytes(CHARSET);
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private static int MAX_RADIUS = 25;
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private static int DEFAULT_DOWN_SAMPLING = 1;
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private int radius;
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private int sampling;
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public SupportBlurTransformation() {
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this(MAX_RADIUS, DEFAULT_DOWN_SAMPLING);
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}
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public SupportBlurTransformation(int radius) {
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this(radius, DEFAULT_DOWN_SAMPLING);
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}
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public SupportBlurTransformation(int radius, int sampling) {
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this.radius = radius;
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this.sampling = sampling;
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}
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@Override protected Bitmap transform(@NonNull Context context, @NonNull BitmapPool pool,
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@NonNull Bitmap toTransform, int outWidth, int outHeight) {
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int width = toTransform.getWidth();
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int height = toTransform.getHeight();
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int scaledWidth = width / sampling;
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int scaledHeight = height / sampling;
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Bitmap bitmap = pool.get(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);
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Canvas canvas = new Canvas(bitmap);
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canvas.scale(1 / (float) sampling, 1 / (float) sampling);
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Paint paint = new Paint();
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paint.setFlags(Paint.FILTER_BITMAP_FLAG);
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canvas.drawBitmap(toTransform, 0, 0, paint);
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
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try {
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bitmap = SupportRSBlur.blur(context, bitmap, radius);
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} catch (RSRuntimeException e) {
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bitmap = FastBlur.blur(bitmap, radius, true);
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}
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} else {
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bitmap = FastBlur.blur(bitmap, radius, true);
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}
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return bitmap;
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}
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@Override public String toString() {
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return "SupportBlurTransformation(radius=" + radius + ", sampling=" + sampling + ")";
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}
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@Override public boolean equals(Object o) {
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return o instanceof SupportBlurTransformation;
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}
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@Override public int hashCode() {
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return ID.hashCode();
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}
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@Override public void updateDiskCacheKey(MessageDigest messageDigest) {
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messageDigest.update(ID_BYTES);
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}
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}
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@ -0,0 +1,70 @@
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package jp.wasabeef.glide.transformations.internal;
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import android.annotation.TargetApi;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.os.Build;
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import android.support.v8.renderscript.Allocation;
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import android.support.v8.renderscript.Element;
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import android.support.v8.renderscript.RSRuntimeException;
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import android.support.v8.renderscript.RenderScript;
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import android.support.v8.renderscript.ScriptIntrinsicBlur;
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/**
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* Copyright (C) 2018 Wasabeef
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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public class SupportRSBlur {
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@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
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public static Bitmap blur(Context context, Bitmap bitmap, int radius) throws RSRuntimeException {
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RenderScript rs = null;
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Allocation input = null;
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Allocation output = null;
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ScriptIntrinsicBlur blur = null;
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try {
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rs = RenderScript.create(context);
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rs.setMessageHandler(new RenderScript.RSMessageHandler());
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input = Allocation.createFromBitmap(rs, bitmap, Allocation.MipmapControl.MIPMAP_NONE,
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Allocation.USAGE_SCRIPT);
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output = Allocation.createTyped(rs, input.getType());
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blur = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
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blur.setInput(input);
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blur.setRadius(radius);
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blur.forEach(output);
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output.copyTo(bitmap);
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} finally {
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if (rs != null) {
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
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RenderScript.releaseAllContexts();
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} else {
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rs.destroy();
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}
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}
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if (input != null) {
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input.destroy();
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}
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if (output != null) {
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output.destroy();
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}
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if (blur != null) {
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blur.destroy();
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}
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}
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return bitmap;
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}
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}
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