From df437ddf13f0bf6b21d387356ef78c39cd948a4a Mon Sep 17 00:00:00 2001 From: furiya-daichi Date: Sun, 11 Jan 2015 22:44:10 +0900 Subject: [PATCH] add Blur --- .../transformations/BlurTransformation.java | 304 ++++++++++++++++++ 1 file changed, 304 insertions(+) create mode 100644 transformations/src/main/java/jp/wasabeef/glide/transformations/BlurTransformation.java diff --git a/transformations/src/main/java/jp/wasabeef/glide/transformations/BlurTransformation.java b/transformations/src/main/java/jp/wasabeef/glide/transformations/BlurTransformation.java new file mode 100644 index 0000000..802f303 --- /dev/null +++ b/transformations/src/main/java/jp/wasabeef/glide/transformations/BlurTransformation.java @@ -0,0 +1,304 @@ +package jp.wasabeef.glide.transformations; + +/** + * Copyright (C) 2015 Wasabeef + * + * 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. + */ + +import com.bumptech.glide.load.Transformation; +import com.bumptech.glide.load.engine.Resource; +import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool; +import com.bumptech.glide.load.resource.bitmap.BitmapResource; + +import android.content.Context; +import android.graphics.Bitmap; +import android.os.Build; +import android.renderscript.Allocation; +import android.renderscript.Element; +import android.renderscript.RenderScript; +import android.renderscript.ScriptIntrinsicBlur; + +public class BlurTransformation implements Transformation { + + private static int MAX_RADIUS = 25; + + private Context mContext; + private BitmapPool mBitmapPool; + + private int mRadius; + + public BlurTransformation(Context context, BitmapPool pool) { + this(context, pool, MAX_RADIUS); + } + + public BlurTransformation(Context context, BitmapPool pool, int radius) { + mContext = context; + mBitmapPool = pool; + this.mRadius = radius; + } + + @Override + public Resource transform(Resource resource, int outWidth, int outHeight) { + Bitmap source = resource.get(); + + if (Build.VERSION.SDK_INT > 16) { + Bitmap bitmap = source.copy(source.getConfig(), true); + + final RenderScript rs = RenderScript.create(mContext); + final Allocation input = Allocation.createFromBitmap(rs, source, + Allocation.MipmapControl.MIPMAP_NONE, + Allocation.USAGE_SCRIPT); + final Allocation output = Allocation.createTyped(rs, input.getType()); + final ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); + script.setRadius(mRadius /* e.g. 3.f */); + script.setInput(input); + script.forEach(output); + output.copyTo(bitmap); + return BitmapResource.obtain(bitmap, mBitmapPool); + } + + // Stack Blur v1.0 from + // http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html + // + // Java Author: Mario Klingemann + // http://incubator.quasimondo.com + // created Feburary 29, 2004 + // Android port : Yahel Bouaziz + // http://www.kayenko.com + // ported april 5th, 2012 + + // This is a compromise between Gaussian Blur and Box blur + // It creates much better looking blurs than Box Blur, but is + // 7x faster than my Gaussian Blur implementation. + // + // I called it Stack Blur because this describes best how this + // filter works internally: it creates a kind of moving stack + // of colors whilst scanning through the image. Thereby it + // just has to add one new block of color to the right side + // of the stack and remove the leftmost color. The remaining + // colors on the topmost layer of the stack are either added on + // or reduced by one, depending on if they are on the right or + // on the left side of the stack. + // + // If you are using this algorithm in your code please add + // the following line: + // + // Stack Blur Algorithm by Mario Klingemann + + Bitmap bitmap = source.copy(source.getConfig(), true); + + if (mRadius < 1) { + return (null); + } + + int w = bitmap.getWidth(); + int h = bitmap.getHeight(); + + int[] pix = new int[w * h]; + bitmap.getPixels(pix, 0, w, 0, 0, w, h); + + int wm = w - 1; + int hm = h - 1; + int wh = w * h; + int div = mRadius + mRadius + 1; + + int r[] = new int[wh]; + int g[] = new int[wh]; + int b[] = new int[wh]; + int rsum, gsum, bsum, x, y, i, p, yp, yi, yw; + int vmin[] = new int[Math.max(w, h)]; + + int divsum = (div + 1) >> 1; + divsum *= divsum; + int dv[] = new int[256 * divsum]; + for (i = 0; i < 256 * divsum; i++) { + dv[i] = (i / divsum); + } + + yw = yi = 0; + + int[][] stack = new int[div][3]; + int stackpointer; + int stackstart; + int[] sir; + int rbs; + int r1 = mRadius + 1; + int routsum, goutsum, boutsum; + int rinsum, ginsum, binsum; + + for (y = 0; y < h; y++) { + rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0; + for (i = -mRadius; i <= mRadius; i++) { + p = pix[yi + Math.min(wm, Math.max(i, 0))]; + sir = stack[i + mRadius]; + sir[0] = (p & 0xff0000) >> 16; + sir[1] = (p & 0x00ff00) >> 8; + sir[2] = (p & 0x0000ff); + rbs = r1 - Math.abs(i); + rsum += sir[0] * rbs; + gsum += sir[1] * rbs; + bsum += sir[2] * rbs; + if (i > 0) { + rinsum += sir[0]; + ginsum += sir[1]; + binsum += sir[2]; + } else { + routsum += sir[0]; + goutsum += sir[1]; + boutsum += sir[2]; + } + } + stackpointer = mRadius; + + for (x = 0; x < w; x++) { + + r[yi] = dv[rsum]; + g[yi] = dv[gsum]; + b[yi] = dv[bsum]; + + rsum -= routsum; + gsum -= goutsum; + bsum -= boutsum; + + stackstart = stackpointer - mRadius + div; + sir = stack[stackstart % div]; + + routsum -= sir[0]; + goutsum -= sir[1]; + boutsum -= sir[2]; + + if (y == 0) { + vmin[x] = Math.min(x + mRadius + 1, wm); + } + p = pix[yw + vmin[x]]; + + sir[0] = (p & 0xff0000) >> 16; + sir[1] = (p & 0x00ff00) >> 8; + sir[2] = (p & 0x0000ff); + + rinsum += sir[0]; + ginsum += sir[1]; + binsum += sir[2]; + + rsum += rinsum; + gsum += ginsum; + bsum += binsum; + + stackpointer = (stackpointer + 1) % div; + sir = stack[(stackpointer) % div]; + + routsum += sir[0]; + goutsum += sir[1]; + boutsum += sir[2]; + + rinsum -= sir[0]; + ginsum -= sir[1]; + binsum -= sir[2]; + + yi++; + } + yw += w; + } + for (x = 0; x < w; x++) { + rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0; + yp = -mRadius * w; + for (i = -mRadius; i <= mRadius; i++) { + yi = Math.max(0, yp) + x; + + sir = stack[i + mRadius]; + + sir[0] = r[yi]; + sir[1] = g[yi]; + sir[2] = b[yi]; + + rbs = r1 - Math.abs(i); + + rsum += r[yi] * rbs; + gsum += g[yi] * rbs; + bsum += b[yi] * rbs; + + if (i > 0) { + rinsum += sir[0]; + ginsum += sir[1]; + binsum += sir[2]; + } else { + routsum += sir[0]; + goutsum += sir[1]; + boutsum += sir[2]; + } + + if (i < hm) { + yp += w; + } + } + yi = x; + stackpointer = mRadius; + for (y = 0; y < h; y++) { + // Preserve alpha channel: ( 0xff000000 & pix[yi] ) + pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum]; + + rsum -= routsum; + gsum -= goutsum; + bsum -= boutsum; + + stackstart = stackpointer - mRadius + div; + sir = stack[stackstart % div]; + + routsum -= sir[0]; + goutsum -= sir[1]; + boutsum -= sir[2]; + + if (x == 0) { + vmin[y] = Math.min(y + r1, hm) * w; + } + p = x + vmin[y]; + + sir[0] = r[p]; + sir[1] = g[p]; + sir[2] = b[p]; + + rinsum += sir[0]; + ginsum += sir[1]; + binsum += sir[2]; + + rsum += rinsum; + gsum += ginsum; + bsum += binsum; + + stackpointer = (stackpointer + 1) % div; + sir = stack[stackpointer]; + + routsum += sir[0]; + goutsum += sir[1]; + boutsum += sir[2]; + + rinsum -= sir[0]; + ginsum -= sir[1]; + binsum -= sir[2]; + + yi += w; + } + } + + bitmap.setPixels(pix, 0, w, 0, 0, w, h); + source.recycle(); + + return BitmapResource.obtain(bitmap, mBitmapPool); + } + + @Override + public String getId() { + return "BlurTransform(radius=" + mRadius + ")"; + } +}