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1 /* |
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2 * Copyright (C) 2013 Square, Inc. |
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3 * |
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4 * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 * you may not use this file except in compliance with the License. |
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6 * You may obtain a copy of the License at |
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7 * |
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8 * http://www.apache.org/licenses/LICENSE-2.0 |
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9 * |
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10 * Unless required by applicable law or agreed to in writing, software |
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11 * distributed under the License is distributed on an "AS IS" BASIS, |
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12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 * See the License for the specific language governing permissions and |
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14 * limitations under the License. |
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15 */ |
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16 package com.squareup.picasso; |
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17 |
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18 import android.graphics.Bitmap; |
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19 |
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20 /** Image transformation. */ |
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21 public interface Transformation { |
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22 /** |
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23 * Transform the source bitmap into a new bitmap. If you create a new bitmap instance, you must |
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24 * call {@link android.graphics.Bitmap#recycle()} on {@code source}. You may return the original |
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25 * if no transformation is required. |
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26 */ |
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27 Bitmap transform(Bitmap source); |
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28 |
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29 /** |
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30 * Returns a unique key for the transformation, used for caching purposes. If the transformation |
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31 * has parameters (e.g. size, scale factor, etc) then these should be part of the key. |
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32 */ |
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33 String key(); |
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34 } |