ImageFilterHue.java revision e5498da0262fc836738aad63ea30286d8afa643c
1/* 2 * Copyright (C) 2012 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 17package com.android.gallery3d.filtershow.filters; 18 19import com.android.gallery3d.R; 20import com.android.gallery3d.filtershow.editors.BasicEditor; 21 22import android.graphics.Bitmap; 23 24public class ImageFilterHue extends SimpleImageFilter { 25 private ColorSpaceMatrix cmatrix = null; 26 27 public ImageFilterHue() { 28 mName = "Hue"; 29 cmatrix = new ColorSpaceMatrix(); 30 } 31 32 public FilterRepresentation getDefaultRepresentation() { 33 FilterBasicRepresentation representation = 34 (FilterBasicRepresentation) super.getDefaultRepresentation(); 35 representation.setName("Hue"); 36 representation.setFilterClass(ImageFilterHue.class); 37 representation.setMinimum(-180); 38 representation.setMaximum(180); 39 representation.setTextId(R.string.hue); 40 representation.setButtonId(R.id.hueButton); 41 representation.setEditorId(BasicEditor.ID); 42 representation.setSupportsPartialRendering(true); 43 return representation; 44 } 45 46 native protected void nativeApplyFilter(Bitmap bitmap, int w, int h, float []matrix); 47 48 @Override 49 public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) { 50 if (getParameters() == null) { 51 return bitmap; 52 } 53 int w = bitmap.getWidth(); 54 int h = bitmap.getHeight(); 55 float value = getParameters().getValue(); 56 cmatrix.identity(); 57 cmatrix.setHue(value); 58 59 nativeApplyFilter(bitmap, w, h, cmatrix.getMatrix()); 60 61 return bitmap; 62 } 63} 64