com.bumptech.glide.load.resource.bitmap.BitmapResource Java Examples

@Override
public Resource<GifDrawable> transform(Resource<GifDrawable> resource, int outWidth, int outHeight) {
    GifDrawable drawable = resource.get();

    // The drawable needs to be initialized with the correct width and height in order for a view displaying it
    // to end up with the right dimensions. Since our transformations may arbitrarily modify the dimensions of
    // our gif, here we create a stand in for a frame and pass it to the transformation to see what the final
    // transformed dimensions will be so that our drawable can report the correct intrinsic width and height.
    Bitmap firstFrame = resource.get().getFirstFrame();
    Resource<Bitmap> bitmapResource = new BitmapResource(firstFrame, bitmapPool);
    Resource<Bitmap> transformed = wrapped.transform(bitmapResource, outWidth, outHeight);
    Bitmap transformedFrame = transformed.get();
    if (!transformedFrame.equals(firstFrame)) {
        return new GifDrawableResource(new GifDrawable(drawable, transformedFrame, wrapped));
    } else {
        return resource;
    }
}
 

@NonNull
@Override
public final Resource<Bitmap> transform(@NonNull Context context, @NonNull Resource<Bitmap> resource,
                                        int outWidth, int outHeight) {
    if (!Util.isValidDimensions(outWidth, outHeight)) {
        throw new IllegalArgumentException(
                "Cannot apply transformation on width: " + outWidth + " or height: " + outHeight
                        + " less than or equal to zero and not Target.SIZE_ORIGINAL");
    }
    BitmapPool bitmapPool = Glide.get(context).getBitmapPool();
    Bitmap toTransform = resource.get();
    System.out.println("target " + Target.SIZE_ORIGINAL + " outWidth " + outWidth  + " transform " +toTransform.getWidth()  );
    int targetWidth = outWidth == Target.SIZE_ORIGINAL ? toTransform.getWidth() : outWidth;
    int targetHeight = outHeight == Target.SIZE_ORIGINAL ? toTransform.getHeight() : outHeight;
    Bitmap transformed = transform(context.getApplicationContext(), bitmapPool, toTransform, targetWidth, targetHeight);

    final Resource<Bitmap> result;
    if (toTransform.equals(transformed)) {
        result = resource;
    } else {
        result = BitmapResource.obtain(transformed, bitmapPool);
    }
    return result;
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
  Bitmap source = resource.get();

  int width = source.getWidth();
  int height = source.getHeight();

  Bitmap bitmap = mBitmapPool.get(width, height, Bitmap.Config.ARGB_8888);
  if (bitmap == null) {
    bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
  }

  Canvas canvas = new Canvas(bitmap);
  Paint paint = new Paint();
  paint.setAntiAlias(true);
  paint.setShader(new BitmapShader(source, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));
  drawRoundRect(canvas, paint, width, height);
  return BitmapResource.obtain(bitmap, mBitmapPool);
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
  Bitmap source = resource.get();
  int size = Math.min(source.getWidth(), source.getHeight());

  mWidth = (source.getWidth() - size) / 2;
  mHeight = (source.getHeight() - size) / 2;

  Bitmap.Config config =
      source.getConfig() != null ? source.getConfig() : Bitmap.Config.ARGB_8888;
  Bitmap bitmap = mBitmapPool.get(mWidth, mHeight, config);
  if (bitmap == null) {
    bitmap = Bitmap.createBitmap(source, mWidth, mHeight, size, size);
  }

  return BitmapResource.obtain(bitmap, mBitmapPool);
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
  Bitmap source = resource.get();

  int width = source.getWidth();
  int height = source.getHeight();

  Bitmap result = mBitmapPool.get(width, height, Bitmap.Config.ARGB_8888);
  if (result == null) {
    result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
  }

  Drawable mask = Utils.getMaskDrawable(mContext, mMaskId);

  Canvas canvas = new Canvas(result);
  mask.setBounds(0, 0, width, height);
  mask.draw(canvas);
  canvas.drawBitmap(source, 0, 0, sMaskingPaint);

  return BitmapResource.obtain(result, mBitmapPool);
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
  Bitmap source = resource.get();

  int width = source.getWidth();
  int height = source.getHeight();

  Bitmap.Config config =
      source.getConfig() != null ? source.getConfig() : Bitmap.Config.ARGB_8888;
  Bitmap bitmap = mBitmapPool.get(width, height, config);
  if (bitmap == null) {
    bitmap = Bitmap.createBitmap(width, height, config);
  }

  Canvas canvas = new Canvas(bitmap);
  ColorMatrix saturation = new ColorMatrix();
  saturation.setSaturation(0f);
  Paint paint = new Paint();
  paint.setColorFilter(new ColorMatrixColorFilter(saturation));
  canvas.drawBitmap(source, 0, 0, paint);

  return BitmapResource.obtain(bitmap, mBitmapPool);
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
    Bitmap source = resource.get();
    int width = source.getWidth();
    int height = source.getHeight();

    Bitmap result = mBitmapPool.get(width, height, Bitmap.Config.ARGB_8888);
    if (result == null) {
        result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    }

    Drawable mask = getMaskDrawable(mContext, mMaskId);

    Canvas canvas = new Canvas(result);
    mask.setBounds(0, 0, width, height);
    mask.draw(canvas);
    canvas.drawBitmap(source, 0, 0, sMaskingPaint);
    return BitmapResource.obtain(result, mBitmapPool);
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
    Bitmap source = resource.get();
    int width = source.getWidth();
    int height = source.getHeight();

    if (radius != 0) {
        source = blur(source);
    }
    Bitmap result = mBitmapPool.get(width, height, Bitmap.Config.ARGB_8888);
    if (result == null) {
        result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    }

    Drawable mask = getMaskDrawable(mContext, mMaskId);

    Canvas canvas = new Canvas(result);
    mask.setBounds(0, 0, width, height);
    mask.draw(canvas);
    canvas.drawBitmap(source, 0, 0, sMaskingPaint);
    return BitmapResource.obtain(result, mBitmapPool);
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
    Bitmap source = resource.get();

    int width = source.getWidth();
    int height = source.getHeight();

    Bitmap bitmap = mBitmapPool.get(width, height, Bitmap.Config.ARGB_8888);
    if (bitmap == null) {
        bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    }

    Canvas canvas = new Canvas(bitmap);//新建一个空白的bitmap
    Paint paint = new Paint();
    paint.setAntiAlias(true);
    paint.setShader(new BitmapShader(source, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));//设置要绘制的图形

    Paint borderPaint = new Paint(Paint.ANTI_ALIAS_FLAG);//设置边框样式
    borderPaint.setColor(mBorderColor);
    borderPaint.setStyle(Paint.Style.STROKE);
    borderPaint.setStrokeWidth(mBorderWidth);

    drawRoundRect(canvas, paint, width, height, borderPaint);
    return BitmapResource.obtain(bitmap, mBitmapPool);
}
 

@Override
public final Resource<Bitmap> transform(Context context, Resource<Bitmap> resource, int outWidth,
    int outHeight) {
  if (!Util.isValidDimensions(outWidth, outHeight)) {
    throw new IllegalArgumentException(
        "Cannot apply transformation on width: " + outWidth + " or height: " + outHeight
            + " less than or equal to zero and not Target.SIZE_ORIGINAL");
  }
  BitmapPool bitmapPool = Glide.get(context).getBitmapPool();
  Bitmap toTransform = resource.get();
  int targetWidth = outWidth == Target.SIZE_ORIGINAL ? toTransform.getWidth() : outWidth;
  int targetHeight = outHeight == Target.SIZE_ORIGINAL ? toTransform.getHeight() : outHeight;
  Bitmap transformed = transform(context.getApplicationContext(), bitmapPool, toTransform,
      targetWidth, targetHeight);

  final Resource<Bitmap> result;
  if (toTransform.equals(transformed)) {
    result = resource;
  } else {
    result = BitmapResource.obtain(transformed, bitmapPool);
  }
  return result;
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
  Bitmap source = resource.get();

  int width = source.getWidth();
  int height = source.getHeight();

  Bitmap bitmap = mBitmapPool.get(width, height, Bitmap.Config.ARGB_8888);
  if (bitmap == null) {
    bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
  }

  Canvas canvas = new Canvas(bitmap);
  Paint paint = new Paint();
  paint.setAntiAlias(true);
  paint.setShader(new BitmapShader(source, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));
  drawRoundRect(canvas, paint, width, height);
  return BitmapResource.obtain(bitmap, mBitmapPool);
}
 

@Override public @Nullable Resource<Bitmap> decode(File file, int w, int h, Options options) throws IOException {
	ByteBuffer buffer = ByteBuffer.allocate(w * h * 4);
	FileInputStream stream = new FileInputStream(file);
	try {
		stream.getChannel().read(buffer);
	} finally {
		stream.close();
	}
	Bitmap result = Bitmap.createBitmap(w, h, Config.ARGB_8888);
	try {
		buffer.rewind();
		result.copyPixelsFromBuffer(buffer);
		return BitmapResource.obtain(result, pool);
	} catch (RuntimeException ex) {
		result.recycle();
		throw ex;
	}
}
 

private static <T> Bitmap createScaledBitmapInto(Context context, T model, int width, int height)
    throws BitmapDecodingException
{
  final Bitmap rough = Downsampler.AT_LEAST.decode(getInputStreamForModel(context, model),
                                                   Glide.get(context).getBitmapPool(),
                                                   width, height,
                                                   DecodeFormat.PREFER_RGB_565);

  final Resource<Bitmap> resource = BitmapResource.obtain(rough, Glide.get(context).getBitmapPool());
  final Resource<Bitmap> result   = new FitCenter(context).transform(resource, width, height);

  if (result == null) {
    throw new BitmapDecodingException("unable to transform Bitmap");
  }
  return result.get();
}
 

private GifBitmapWrapper decodeGifWrapper(InputStream bis, int width, int height) throws IOException {
    GifBitmapWrapper result = null;
    Resource<GifDrawable> gifResource = gifDecoder.decode(bis, width, height);
    if (gifResource != null) {
        GifDrawable drawable = gifResource.get();
        // We can more efficiently hold Bitmaps in memory, so for static GIFs, try to return Bitmaps
        // instead. Returning a Bitmap incurs the cost of allocating the GifDrawable as well as the normal
        // Bitmap allocation, but since we can encode the Bitmap out as a JPEG, future decodes will be
        // efficient.
        if (drawable.getFrameCount() > 1) {
            result = new GifBitmapWrapper(null /*bitmapResource*/, gifResource);
        } else {
            Resource<Bitmap> bitmapResource = new BitmapResource(drawable.getFirstFrame(), bitmapPool);
            result = new GifBitmapWrapper(bitmapResource, null /*gifResource*/);
        }
    }
    return result;
}
 

/**
 * Attempts to allocate {@link Bitmap}s and returns {@code true} if there are more
 * {@link Bitmap}s to allocate and {@code false} otherwise.
 */
private boolean allocate() {
    long start = clock.now();
    while (!toPrefill.isEmpty() && !isGcDetected(start)) {
        PreFillType toAllocate = toPrefill.remove();
        Bitmap bitmap = Bitmap.createBitmap(toAllocate.getWidth(), toAllocate.getHeight(),
                toAllocate.getConfig());

        // Don't over fill the memory cache to avoid evicting useful resources, but make sure it's not empty so
        // we use all available space.
        if (getFreeMemoryCacheBytes() >= Util.getBitmapByteSize(bitmap)) {
            memoryCache.put(new UniqueKey(), BitmapResource.obtain(bitmap, bitmapPool));
        } else {
            addToBitmapPool(toAllocate, bitmap);
        }

        if (Log.isLoggable(TAG, Log.DEBUG)) {
            Log.d(TAG, "allocated [" + toAllocate.getWidth() + "x" + toAllocate.getHeight() + "] "
                    + toAllocate.getConfig() + " size: " + Util.getBitmapByteSize(bitmap));
        }
    }

    return !isCancelled && !toPrefill.isEmpty();
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
  Bitmap source = resource.get();

  int width = source.getWidth();
  int height = source.getHeight();

  Bitmap.Config config =
      source.getConfig() != null ? source.getConfig() : Bitmap.Config.ARGB_8888;
  Bitmap bitmap = mBitmapPool.get(width, height, config);
  if (bitmap == null) {
    bitmap = Bitmap.createBitmap(width, height, config);
  }

  Canvas canvas = new Canvas(bitmap);
  Paint paint = new Paint();
  paint.setAntiAlias(true);
  paint.setColorFilter(new PorterDuffColorFilter(mColor, PorterDuff.Mode.SRC_ATOP));
  canvas.drawBitmap(source, 0, 0, paint);

  return BitmapResource.obtain(bitmap, mBitmapPool);
}
 

@NonNull
@Override
public final Resource<Bitmap> transform(@NonNull Context context, @NonNull Resource<Bitmap> resource,
                                        int outWidth, int outHeight) {
  if (!Util.isValidDimensions(outWidth, outHeight)) {
    throw new IllegalArgumentException(
        "Cannot apply transformation on width: " + outWidth + " or height: " + outHeight
            + " less than or equal to zero and not Target.SIZE_ORIGINAL");
  }
  BitmapPool bitmapPool = Glide.get(context).getBitmapPool();
  Bitmap toTransform = resource.get();
  int targetWidth = outWidth == Target.SIZE_ORIGINAL ? toTransform.getWidth() : outWidth;
  int targetHeight = outHeight == Target.SIZE_ORIGINAL ? toTransform.getHeight() : outHeight;
  Bitmap transformed = transform(context.getApplicationContext(), bitmapPool, toTransform, targetWidth, targetHeight);

  final Resource<Bitmap> result;
  if (toTransform.equals(transformed)) {
    result = resource;
  } else {
    result = BitmapResource.obtain(transformed, bitmapPool);
  }
  return result;
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
  Bitmap source = resource.get();

  int width = source.getWidth();
  int height = source.getHeight();

  Bitmap.Config config =
      source.getConfig() != null ? source.getConfig() : Bitmap.Config.ARGB_8888;
  Bitmap bitmap = mBitmapPool.get(width, height, config);
  if (bitmap == null) {
    bitmap = Bitmap.createBitmap(width, height, config);
  }

  Canvas canvas = new Canvas(bitmap);
  ColorMatrix saturation = new ColorMatrix();
  saturation.setSaturation(0f);
  Paint paint = new Paint();
  paint.setColorFilter(new ColorMatrixColorFilter(saturation));
  canvas.drawBitmap(source, 0, 0, paint);

  return BitmapResource.obtain(bitmap, mBitmapPool);
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
  Bitmap source = resource.get();

  int width = source.getWidth();
  int height = source.getHeight();

  Bitmap result = mBitmapPool.get(width, height, Bitmap.Config.ARGB_8888);
  if (result == null) {
    result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
  }

  Drawable mask = Utils.getMaskDrawable(mContext, mMaskId);

  Canvas canvas = new Canvas(result);
  mask.setBounds(0, 0, width, height);
  mask.draw(canvas);
  canvas.drawBitmap(source, 0, 0, sMaskingPaint);

  return BitmapResource.obtain(result, mBitmapPool);
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
  Bitmap source = resource.get();
  int size = Math.min(source.getWidth(), source.getHeight());

  mWidth = (source.getWidth() - size) / 2;
  mHeight = (source.getHeight() - size) / 2;

  Bitmap.Config config =
      source.getConfig() != null ? source.getConfig() : Bitmap.Config.ARGB_8888;
  Bitmap bitmap = mBitmapPool.get(mWidth, mHeight, config);
  if (bitmap == null) {
    bitmap = Bitmap.createBitmap(source, mWidth, mHeight, size, size);
  }

  return BitmapResource.obtain(bitmap, mBitmapPool);
}
 

@Override public Resource<Bitmap> decode(InputStream source, int width, int height) throws IOException {
	Bitmap bitmap = BitmapFactory.decodeStream(source);
	// read source stream into a Bitmap object (whatever the format)
	// make sure it's not using too much memory
	// the best is obviously if the loaded image matches the given width/height so downstream transformation will just pass it on
	return BitmapResource.obtain(bitmap, bitmapPool);
}
 

@Override public boolean encode(Resource<PaletteBitmap> data, OutputStream os) {
	PaletteBitmap bitmap = data.get();
	// Resource objects are only created to satisfy the contract, they don't need to be recycled.
	boolean paletteOK = paletteEncoder.encode(new SimpleResource<>(bitmap.palette), os);
	boolean bitmapOK = bitmapEncoder.encode(new BitmapResource(bitmap.bitmap, FAKE_POOL), os);
	return bitmapOK && paletteOK;
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
  Bitmap source = resource.get();

  int width = source.getWidth();
  int height = source.getHeight();
  int scaledWidth = width / mSampling;
  int scaledHeight = height / mSampling;

  Bitmap bitmap = mBitmapPool.get(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);
  if (bitmap == null) {
    bitmap = Bitmap.createBitmap(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);
  }

  Canvas canvas = new Canvas(bitmap);
  canvas.scale(1 / (float) mSampling, 1 / (float) mSampling);
  Paint paint = new Paint();
  paint.setFlags(Paint.FILTER_BITMAP_FLAG);
  canvas.drawBitmap(source, 0, 0, paint);

  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
    try {
      bitmap = RSBlur.blur(mContext, bitmap, mRadius);
    } catch (RSRuntimeException e) {
      bitmap = FastBlur.blur(bitmap, mRadius, true);
    }
  } else {
    bitmap = FastBlur.blur(bitmap, mRadius, true);
  }

  return BitmapResource.obtain(bitmap, mBitmapPool);
}
 

private BitmapDrawable transformDrawable(Drawable drawable, Transformation<Bitmap> transform, int size) {
	// render original
	Bitmap bitmap = Bitmap.createBitmap(size, size, Config.ARGB_8888);
	Canvas canvas = new Canvas(bitmap);
	drawable.setBounds(0, 0, size, size);
	drawable.draw(canvas);
	// make rounded
	Resource<Bitmap> original = BitmapResource.obtain(bitmap, Glide.get(getContext()).getBitmapPool());
	Resource<Bitmap> rounded = transform.transform(original, size, size);
	if (!original.equals(rounded)) {
		original.recycle();
	}
	return new BitmapDrawable(getResources(), rounded.get());
}
 

@Override public Resource<Bitmap> decode(Drawable drawable, int width, int height) throws IOException {
	Config config = PixelFormat.formatHasAlpha(drawable.getOpacity())? Config.ARGB_8888 : Config.RGB_565;
	Bitmap bitmap = pool.get(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), config);
	if (bitmap == null) {
		bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), config);
	}
	Canvas canvas = new Canvas(bitmap);
	drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
	drawable.draw(canvas);
	return new BitmapResource(bitmap, pool);
}
 

@Override public Resource<Bitmap> decode(T source, int width, int height) throws IOException {
	BitmapRegionDecoder decoder = createDecoder(source, width, height);
	Options opts = new Options();
	// Algorithm from Glide's Downsampler.getRoundedSampleSize
	int sampleSize = (int)Math.ceil((double)region.width() / (double)width);
	sampleSize = sampleSize == 0? 0 : Integer.highestOneBit(sampleSize);
	sampleSize = Math.max(1, sampleSize);
	opts.inSampleSize = sampleSize;

	// Although functionally equivalent to 0 for BitmapFactory, 1 is a safer default for our code than 0.
	Bitmap bitmap = decoder.decodeRegion(region, opts);
	return BitmapResource.obtain(bitmap, bitmapPool);
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
  Bitmap source = resource.get();
  int size = Math.min(source.getWidth(), source.getHeight());

  int width = (source.getWidth() - size) / 2;
  int height = (source.getHeight() - size) / 2;

  Bitmap bitmap = mBitmapPool.get(size, size, Bitmap.Config.ARGB_8888);
  if (bitmap == null) {
    bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
  }

  Canvas canvas = new Canvas(bitmap);
  Paint paint = new Paint();
  BitmapShader shader =
      new BitmapShader(source, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
  if (width != 0 || height != 0) {
    // source isn't square, move viewport to center
    Matrix matrix = new Matrix();
    matrix.setTranslate(-width, -height);
    shader.setLocalMatrix(matrix);
  }
  paint.setShader(shader);
  paint.setAntiAlias(true);

  float r = size / 2f;
  canvas.drawCircle(r, r, r, paint);

  return BitmapResource.obtain(bitmap, mBitmapPool);
}
 

@Override public Resource<Bitmap> decode(GenerateParams source, int width, int height) throws IOException {
	BitmapPool pool = Glide.get(context).getBitmapPool();
	Bitmap bitmap = pool.getDirty(width, height, Bitmap.Config.ARGB_8888);
	if (bitmap == null) {
		bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
	}
	Generators.imageWithTextNoLayout(context, bitmap, source);
	return BitmapResource.obtain(bitmap, pool);
}
 

@Override public @Nullable Resource<Bitmap> decode(
		HashMap<String, ?> bufferData, int w, int h, Options options) throws IOException {
	int width = (Integer)bufferData.get("width");
	int height = (Integer)bufferData.get("height");
	String path = (String)bufferData.get("path");
	ByteBuffer buffer = ByteBuffer.allocate(width * height * 4);
	FileInputStream stream = new FileInputStream(path);
	stream.getChannel().read(buffer);
	stream.close();
	Bitmap result = Bitmap.createBitmap(width, height, Config.ARGB_8888);
	buffer.position(0);
	result.copyPixelsFromBuffer(buffer);
	return BitmapResource.obtain(result, pool);
}
 

@Override
public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
    Bitmap source = resource.get();

    int width = source.getWidth();
    int height = source.getHeight();
    int scaledWidth = width / mSampling;
    int scaledHeight = height / mSampling;

    Bitmap bitmap = mBitmapPool.get(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);
    if (bitmap == null) {
        bitmap = Bitmap.createBitmap(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);
    }

    Canvas canvas = new Canvas(bitmap);
    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 input = Allocation.createFromBitmap(rs, bitmap, Allocation.MipmapControl.MIPMAP_NONE,
            Allocation.USAGE_SCRIPT);
    Allocation output = Allocation.createTyped(rs, input.getType());
    ScriptIntrinsicBlur blur = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));

    blur.setInput(input);
    blur.setRadius(mRadius);
    blur.forEach(output);
    output.copyTo(bitmap);

    rs.destroy();

    return BitmapResource.obtain(bitmap, mBitmapPool);
}