ImageFilterDownsample.java revision f4486566491c2f6c51817f92ee1000d12db41c1b
1103ccde8fe2f2c8abde914a8ba736b2e9cb8d20bElliott Hughes/* 2103ccde8fe2f2c8abde914a8ba736b2e9cb8d20bElliott Hughes * Copyright (C) 2012 The Android Open Source Project 39abbbdc5346020e33a8fdbe7254dd0fdff9df616Elliott Hughes * 41fa0d849576555577ffd9675677a3c95f21b754eRaghu Gandham * Licensed under the Apache License, Version 2.0 (the "License"); 59abbbdc5346020e33a8fdbe7254dd0fdff9df616Elliott Hughes * you may not use this file except in compliance with the License. 61fa0d849576555577ffd9675677a3c95f21b754eRaghu Gandham * You may obtain a copy of the License at 7eae27dc55adca75c2332e4b767ec667acfbbbcb3Elliott Hughes * 8eae27dc55adca75c2332e4b767ec667acfbbbcb3Elliott Hughes * http://www.apache.org/licenses/LICENSE-2.0 91fa0d849576555577ffd9675677a3c95f21b754eRaghu Gandham * 10eae27dc55adca75c2332e4b767ec667acfbbbcb3Elliott Hughes * Unless required by applicable law or agreed to in writing, software 11eae27dc55adca75c2332e4b767ec667acfbbbcb3Elliott Hughes * distributed under the License is distributed on an "AS IS" BASIS, 12eae27dc55adca75c2332e4b767ec667acfbbbcb3Elliott Hughes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 131fa0d849576555577ffd9675677a3c95f21b754eRaghu Gandham * See the License for the specific language governing permissions and 141fa0d849576555577ffd9675677a3c95f21b754eRaghu Gandham * limitations under the License. 157efad83d430f4d824f2aaa75edea5106f6ff8aaeElliott Hughes */ 16eae27dc55adca75c2332e4b767ec667acfbbbcb3Elliott Hughes 171fa0d849576555577ffd9675677a3c95f21b754eRaghu Gandhampackage com.android.gallery3d.filtershow.filters; 181fa0d849576555577ffd9675677a3c95f21b754eRaghu Gandham 199abbbdc5346020e33a8fdbe7254dd0fdff9df616Elliott Hughesimport android.graphics.Bitmap; 20import android.graphics.Canvas; 21import android.graphics.Rect; 22 23import com.android.gallery3d.R; 24import com.android.gallery3d.filtershow.cache.ImageLoader; 25 26public class ImageFilterDownsample extends SimpleImageFilter { 27 private static final int ICON_DOWNSAMPLE_FRACTION = 8; 28 private ImageLoader mImageLoader; 29 30 public ImageFilterDownsample(ImageLoader loader) { 31 mName = "Downsample"; 32 mImageLoader = loader; 33 } 34 35 public FilterRepresentation getDefaultRepresentation() { 36 FilterBasicRepresentation representation = (FilterBasicRepresentation) super.getDefaultRepresentation(); 37 representation.setName("Downsample"); 38 representation.setFilterClass(ImageFilterDownsample.class); 39 representation.setMaximum(100); 40 representation.setMinimum(1); 41 representation.setValue(50); 42 representation.setDefaultValue(50); 43 representation.setPreviewValue(3); 44 representation.setTextId(R.string.downsample); 45 representation.setButtonId(R.id.downsampleButton); 46 return representation; 47 } 48 49 @Override 50 public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) { 51 if (getParameters() == null) { 52 return bitmap; 53 } 54 int w = bitmap.getWidth(); 55 int h = bitmap.getHeight(); 56 int p = getParameters().getValue(); 57 58 // size of original precached image 59 Rect size = mImageLoader.getOriginalBounds(); 60 int orig_w = size.width(); 61 int orig_h = size.height(); 62 63 if (p > 0 && p < 100) { 64 // scale preview to same size as the resulting bitmap from a "save" 65 int newWidth = orig_w * p / 100; 66 int newHeight = orig_h * p / 100; 67 68 // only scale preview if preview isn't already scaled enough 69 if (newWidth <= 0 || newHeight <= 0 || newWidth >= w || newHeight >= h) { 70 return bitmap; 71 } 72 Bitmap ret = Bitmap.createScaledBitmap(bitmap, newWidth, newHeight, true); 73 if (ret != bitmap) { 74 bitmap.recycle(); 75 } 76 return ret; 77 } 78 return bitmap; 79 } 80} 81