1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.gallery3d.photoeditor.filters; 18 19 import android.media.effect.Effect; 20 import android.media.effect.EffectFactory; 21 22 import com.android.gallery3d.photoeditor.Photo; 23 24 /** 25 * Saturation filter applied to the image. 26 */ 27 public class SaturationFilter extends Filter { 28 29 private float scale; 30 31 /** 32 * Sets the saturation level. 33 * 34 * @param scale ranges from 0 to 1. 35 */ setSaturation(float scale)36 public void setSaturation(float scale) { 37 this.scale = (scale - 0.5f) * 2; 38 validate(); 39 } 40 41 @Override process(Photo src, Photo dst)42 public void process(Photo src, Photo dst) { 43 Effect effect = getEffect(EffectFactory.EFFECT_SATURATE); 44 effect.setParameter("scale", scale); 45 effect.apply(src.texture(), src.width(), src.height(), dst.texture()); 46 } 47 } 48