The Tor Browser / file revision

 /*

  * Copyright (C) 2013 Square, Inc.

  *

  * 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.

  */

 package com.squareup.picasso;

 import android.graphics.Bitmap;

 /** Image transformation. */

 public interface Transformation {

   /**

    * Transform the source bitmap into a new bitmap. If you create a new bitmap instance, you must

    * call {@link android.graphics.Bitmap#recycle()} on {@code source}. You may return the original

    * if no transformation is required.

    */

   Bitmap transform(Bitmap source);

   /**

    * Returns a unique key for the transformation, used for caching purposes. If the transformation

    * has parameters (e.g. size, scale factor, etc) then these should be part of the key.

    */

   String key();

 }