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add Blur
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furiya-daichi
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df437ddf13
@ -0,0 +1,304 @@
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package jp.wasabeef.glide.transformations;
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/**
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* Copyright (C) 2015 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 com.bumptech.glide.load.Transformation;
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import com.bumptech.glide.load.engine.Resource;
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import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
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import com.bumptech.glide.load.resource.bitmap.BitmapResource;
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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.renderscript.Allocation;
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import android.renderscript.Element;
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import android.renderscript.RenderScript;
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import android.renderscript.ScriptIntrinsicBlur;
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public class BlurTransformation implements Transformation<Bitmap> {
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private static int MAX_RADIUS = 25;
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private Context mContext;
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private BitmapPool mBitmapPool;
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private int mRadius;
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public BlurTransformation(Context context, BitmapPool pool) {
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this(context, pool, MAX_RADIUS);
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}
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public BlurTransformation(Context context, BitmapPool pool, int radius) {
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mContext = context;
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mBitmapPool = pool;
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this.mRadius = radius;
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}
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@Override
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public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
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Bitmap source = resource.get();
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if (Build.VERSION.SDK_INT > 16) {
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Bitmap bitmap = source.copy(source.getConfig(), true);
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final RenderScript rs = RenderScript.create(mContext);
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final Allocation input = Allocation.createFromBitmap(rs, source,
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Allocation.MipmapControl.MIPMAP_NONE,
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Allocation.USAGE_SCRIPT);
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final Allocation output = Allocation.createTyped(rs, input.getType());
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final ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
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script.setRadius(mRadius /* e.g. 3.f */);
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script.setInput(input);
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script.forEach(output);
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output.copyTo(bitmap);
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return BitmapResource.obtain(bitmap, mBitmapPool);
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}
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// Stack Blur v1.0 from
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// http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html
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//
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// Java Author: Mario Klingemann <mario at quasimondo.com>
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// http://incubator.quasimondo.com
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// created Feburary 29, 2004
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// Android port : Yahel Bouaziz <yahel at kayenko.com>
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// http://www.kayenko.com
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// ported april 5th, 2012
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// This is a compromise between Gaussian Blur and Box blur
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// It creates much better looking blurs than Box Blur, but is
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// 7x faster than my Gaussian Blur implementation.
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//
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// I called it Stack Blur because this describes best how this
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// filter works internally: it creates a kind of moving stack
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// of colors whilst scanning through the image. Thereby it
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// just has to add one new block of color to the right side
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// of the stack and remove the leftmost color. The remaining
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// colors on the topmost layer of the stack are either added on
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// or reduced by one, depending on if they are on the right or
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// on the left side of the stack.
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//
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// If you are using this algorithm in your code please add
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// the following line:
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//
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// Stack Blur Algorithm by Mario Klingemann <mario@quasimondo.com>
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Bitmap bitmap = source.copy(source.getConfig(), true);
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if (mRadius < 1) {
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return (null);
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}
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int w = bitmap.getWidth();
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int h = bitmap.getHeight();
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int[] pix = new int[w * h];
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bitmap.getPixels(pix, 0, w, 0, 0, w, h);
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int wm = w - 1;
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int hm = h - 1;
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int wh = w * h;
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int div = mRadius + mRadius + 1;
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int r[] = new int[wh];
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int g[] = new int[wh];
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int b[] = new int[wh];
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int rsum, gsum, bsum, x, y, i, p, yp, yi, yw;
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int vmin[] = new int[Math.max(w, h)];
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int divsum = (div + 1) >> 1;
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divsum *= divsum;
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int dv[] = new int[256 * divsum];
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for (i = 0; i < 256 * divsum; i++) {
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dv[i] = (i / divsum);
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}
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yw = yi = 0;
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int[][] stack = new int[div][3];
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int stackpointer;
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int stackstart;
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int[] sir;
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int rbs;
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int r1 = mRadius + 1;
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int routsum, goutsum, boutsum;
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int rinsum, ginsum, binsum;
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for (y = 0; y < h; y++) {
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rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
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for (i = -mRadius; i <= mRadius; i++) {
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p = pix[yi + Math.min(wm, Math.max(i, 0))];
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sir = stack[i + mRadius];
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sir[0] = (p & 0xff0000) >> 16;
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sir[1] = (p & 0x00ff00) >> 8;
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sir[2] = (p & 0x0000ff);
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rbs = r1 - Math.abs(i);
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rsum += sir[0] * rbs;
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gsum += sir[1] * rbs;
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bsum += sir[2] * rbs;
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if (i > 0) {
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rinsum += sir[0];
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ginsum += sir[1];
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binsum += sir[2];
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} else {
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routsum += sir[0];
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goutsum += sir[1];
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boutsum += sir[2];
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}
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}
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stackpointer = mRadius;
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for (x = 0; x < w; x++) {
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r[yi] = dv[rsum];
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g[yi] = dv[gsum];
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b[yi] = dv[bsum];
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rsum -= routsum;
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gsum -= goutsum;
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bsum -= boutsum;
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stackstart = stackpointer - mRadius + div;
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sir = stack[stackstart % div];
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routsum -= sir[0];
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goutsum -= sir[1];
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boutsum -= sir[2];
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if (y == 0) {
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vmin[x] = Math.min(x + mRadius + 1, wm);
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}
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p = pix[yw + vmin[x]];
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sir[0] = (p & 0xff0000) >> 16;
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sir[1] = (p & 0x00ff00) >> 8;
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sir[2] = (p & 0x0000ff);
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rinsum += sir[0];
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ginsum += sir[1];
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binsum += sir[2];
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rsum += rinsum;
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gsum += ginsum;
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bsum += binsum;
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stackpointer = (stackpointer + 1) % div;
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sir = stack[(stackpointer) % div];
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routsum += sir[0];
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goutsum += sir[1];
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boutsum += sir[2];
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rinsum -= sir[0];
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ginsum -= sir[1];
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binsum -= sir[2];
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yi++;
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}
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yw += w;
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}
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for (x = 0; x < w; x++) {
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rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
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yp = -mRadius * w;
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for (i = -mRadius; i <= mRadius; i++) {
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yi = Math.max(0, yp) + x;
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sir = stack[i + mRadius];
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sir[0] = r[yi];
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sir[1] = g[yi];
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sir[2] = b[yi];
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rbs = r1 - Math.abs(i);
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rsum += r[yi] * rbs;
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gsum += g[yi] * rbs;
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bsum += b[yi] * rbs;
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if (i > 0) {
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rinsum += sir[0];
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ginsum += sir[1];
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binsum += sir[2];
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} else {
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routsum += sir[0];
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goutsum += sir[1];
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boutsum += sir[2];
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}
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if (i < hm) {
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yp += w;
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}
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}
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yi = x;
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stackpointer = mRadius;
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for (y = 0; y < h; y++) {
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// Preserve alpha channel: ( 0xff000000 & pix[yi] )
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pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum];
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rsum -= routsum;
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gsum -= goutsum;
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bsum -= boutsum;
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stackstart = stackpointer - mRadius + div;
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sir = stack[stackstart % div];
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routsum -= sir[0];
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goutsum -= sir[1];
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boutsum -= sir[2];
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if (x == 0) {
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vmin[y] = Math.min(y + r1, hm) * w;
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}
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p = x + vmin[y];
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sir[0] = r[p];
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sir[1] = g[p];
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sir[2] = b[p];
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rinsum += sir[0];
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ginsum += sir[1];
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binsum += sir[2];
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rsum += rinsum;
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gsum += ginsum;
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bsum += binsum;
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stackpointer = (stackpointer + 1) % div;
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sir = stack[stackpointer];
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routsum += sir[0];
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goutsum += sir[1];
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boutsum += sir[2];
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rinsum -= sir[0];
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ginsum -= sir[1];
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binsum -= sir[2];
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yi += w;
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}
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}
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bitmap.setPixels(pix, 0, w, 0, 0, w, h);
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source.recycle();
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return BitmapResource.obtain(bitmap, mBitmapPool);
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}
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@Override
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public String getId() {
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return "BlurTransform(radius=" + mRadius + ")";
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}
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}
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