SwirlFilterTransformation.java

package jp.wasabeef.glide.transformations.gpu;

/**
 * Copyright (C) 2017 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 android.content.Context;
import android.graphics.PointF;
import com.bumptech.glide.Glide;
import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import jp.co.cyberagent.android.gpuimage.GPUImageSwirlFilter;

/**
 * Creates a swirl distortion on the image.
 */
public class SwirlFilterTransformation extends GPUFilterTransformation {

  private float mRadius;
  private float mAngle;
  private PointF mCenter;

  public SwirlFilterTransformation(Context context) {
    this(context, Glide.get(context).getBitmapPool());
  }

  public SwirlFilterTransformation(Context context, BitmapPool pool) {
    this(context, pool, .5f, 1.0f, new PointF(0.5f, 0.5f));
  }

  public SwirlFilterTransformation(Context context, float radius, float angle, PointF center) {
    this(context, Glide.get(context).getBitmapPool(), radius, angle, center);
  }

  /**
   * @param radius from 0.0 to 1.0, default 0.5
   * @param angle minimum 0.0, default 1.0
   * @param center default (0.5, 0.5)
   */
  public SwirlFilterTransformation(Context context, BitmapPool pool, float radius, float angle,
      PointF center) {
    super(context, pool, new GPUImageSwirlFilter());
    mRadius = radius;
    mAngle = angle;
    mCenter = center;
    GPUImageSwirlFilter filter = getFilter();
    filter.setRadius(mRadius);
    filter.setAngle(mAngle);
    filter.setCenter(mCenter);
  }

  @Override public String getId() {
    return "SwirlFilterTransformation(radius=" + mRadius +
        ",angle=" + mAngle + ",center=" + mCenter.toString() + ")";
  }
}