Added the DownSampling to BlurTransformation

build.gradle

@@ -5,8 +5,8 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.2.3'
+        classpath 'com.android.tools.build:gradle:1.3.0-beta4'
-        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.0'
+        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

example/build.gradle

@@ -53,8 +53,8 @@ def getKeyAliasPasswordProperty() {
 
 dependencies {
     compile project(':transformations')
-    compile 'jp.co.cyberagent.android.gpuimage:gpuimage-library:1.2.3'
+    compile "com.github.bumptech.glide:glide:${GLIDE_VERSION}"
-    compile 'com.android.support:appcompat-v7:22.2.0'
+    compile "jp.co.cyberagent.android.gpuimage:gpuimage-library:${GPUIMAGE_VERSION}"
-    compile 'com.android.support:recyclerview-v7:22.2.0'
+    compile "com.android.support:appcompat-v7:${SUPPORT_PACKAGE_VERSION}"
-    compile 'com.github.bumptech.glide:glide:3.6.1'
+    compile "com.android.support:recyclerview-v7:${SUPPORT_PACKAGE_VERSION}"
 }

example/src/main/java/jp/wasabeef/example/glide/MainAdapter.java

@@ -81,7 +81,7 @@ public class MainAdapter extends RecyclerView.Adapter<MainAdapter.ViewHolder> {
 
     @Override
     public void onBindViewHolder(MainAdapter.ViewHolder holder, int position) {
-        Transformation<Bitmap> transformation = null;
+        Transformation transformation = null;
         switch (mDataSet.get(position)) {
             case CropTop:
                 transformation =
@@ -110,7 +110,7 @@ public class MainAdapter extends RecyclerView.Adapter<MainAdapter.ViewHolder> {
                 transformation = new RoundedCornersTransformation(mPool, 100, 0);
                 break;
             case Blur:
-                transformation = new BlurTransformation(mContext, mPool, 10);
+                transformation = new BlurTransformation(mContext, mPool, 25, 1);
                 break;
             case Toon:
                 transformation = new ToonFilterTransformation(mContext, mPool);

example/src/main/res/layout/layout_list_item.xml

@@ -6,11 +6,10 @@
 
     <ImageView
         android:id="@+id/image"
-        android:layout_width="wrap_content"
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_centerInParent="true"
-        android:contentDescription="@null"
+        android:contentDescription="@null"/>
-        android:src="@drawable/demo"/>
 
     <TextView
         android:id="@+id/title"

gradle.properties

@@ -1,5 +1,5 @@
-VERSION_NAME=1.0.7
+VERSION_NAME=1.0.8
-VERSION_CODE=7
+VERSION_CODE=8
 GROUP=jp.wasabeef
 ARTIFACT_ID=glide-transformations
 
@@ -22,3 +22,7 @@ POM_DEVELOPER_NAME=Wasabeef
 POM_DEVELOPER_EMAIL=dadadada.chop@gmail.com
 POM_DEVELOPER_URL=wasabeef.jp
 ISSUE_URL=https://github.com/wasabeef/glide-transformations/issues
+
+SUPPORT_PACKAGE_VERSION=22.2.1
+GLIDE_VERSION=3.6.1
+GPUIMAGE_VERSION=1.2.3

transformations/build.gradle

@@ -15,9 +15,8 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile "com.github.bumptech.glide:glide:${GLIDE_VERSION}"
-    compile 'com.github.bumptech.glide:glide:3.6.1'
+    compile "jp.co.cyberagent.android.gpuimage:gpuimage-library:${GPUIMAGE_VERSION}"
-    compile 'jp.co.cyberagent.android.gpuimage:gpuimage-library:1.2.3'
 }
 
 android.libraryVariants.all { variant ->

transformations/src/main/java/jp/wasabeef/glide/transformations/BlurTransformation.java

@@ -24,27 +24,36 @@ import com.bumptech.glide.load.resource.bitmap.BitmapResource;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
+import android.graphics.Paint;
 import android.support.v8.renderscript.Allocation;
+import android.support.v8.renderscript.Element;
 import android.support.v8.renderscript.RenderScript;
 import android.support.v8.renderscript.ScriptIntrinsicBlur;
 
 public class BlurTransformation implements Transformation<Bitmap> {
 
     private static int MAX_RADIUS = 25;
+    private static int DEFAULT_DOWN_SAMPLING = 1;
 
     private Context mContext;
     private BitmapPool mBitmapPool;
 
     private int mRadius;
+    private int mSampling;
 
     public BlurTransformation(Context context, BitmapPool pool) {
-        this(context, pool, MAX_RADIUS);
+        this(context, pool, MAX_RADIUS, DEFAULT_DOWN_SAMPLING);
     }
 
     public BlurTransformation(Context context, BitmapPool pool, int radius) {
+        this(context, pool, radius, DEFAULT_DOWN_SAMPLING);
+    }
+
+    public BlurTransformation(Context context, BitmapPool pool, int radius, int sampling) {
         mContext = context;
         mBitmapPool = pool;
         mRadius = radius;
+        mSampling = sampling;
     }
 
     @Override
@@ -53,22 +62,30 @@ public class BlurTransformation implements Transformation<Bitmap> {
 
         int width = source.getWidth();
         int height = source.getHeight();
+        int scaledWidth = width / mSampling;
+        int scaledHeight = height / mSampling;
 
-        Bitmap bitmap = mBitmapPool.get(width, height, Bitmap.Config.ARGB_8888);
+        Bitmap bitmap = mBitmapPool.get(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);
         if (bitmap == null) {
-            bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+            bitmap = Bitmap.createBitmap(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);
         }
 
         Canvas canvas = new Canvas(bitmap);
-        canvas.drawBitmap(source, 0, 0, null);
+        canvas.scale(1 / (float) mSampling, 1 / (float) mSampling);
+        Paint paint = new Paint();
+        paint.setFlags(Paint.FILTER_BITMAP_FLAG);
+        canvas.drawBitmap(source, 0, 0, paint);
 
         RenderScript rs = RenderScript.create(mContext);
-        Allocation overlayAlloc = Allocation.createFromBitmap(rs, bitmap);
+        Allocation input = Allocation.createFromBitmap(rs, bitmap,
-        ScriptIntrinsicBlur blur = ScriptIntrinsicBlur.create(rs, overlayAlloc.getElement());
+                Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_SCRIPT);
-        blur.setInput(overlayAlloc);
+        Allocation output = Allocation.createTyped(rs, input.getType());
+        ScriptIntrinsicBlur blur = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
+
+        blur.setInput(input);
         blur.setRadius(mRadius);
-        blur.forEach(overlayAlloc);
+        blur.forEach(output);
-        overlayAlloc.copyTo(bitmap);
+        output.copyTo(bitmap);
 
         rs.destroy();
 
@@ -77,6 +94,6 @@ public class BlurTransformation implements Transformation<Bitmap> {
 
     @Override
     public String getId() {
-        return "BlurTransformation(radius=" + mRadius + ")";
+        return "BlurTransformation(radius=" + mRadius + ", sampling=" + mSampling + ")";
     }
 }