| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * 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.android.gallery3d.filtershow.filters; |
| |
| import android.graphics.Bitmap; |
| import android.text.format.Time; |
| |
| import com.android.gallery3d.R; |
| |
| public class ImageFilterKMeans extends SimpleImageFilter { |
| private int mSeed = 0; |
| |
| public ImageFilterKMeans() { |
| mName = "KMeans"; |
| |
| // set random seed for session |
| Time t = new Time(); |
| t.setToNow(); |
| mSeed = (int) t.toMillis(false); |
| } |
| |
| public FilterRepresentation getDefaultRepresentation() { |
| FilterBasicRepresentation representation = (FilterBasicRepresentation) super.getDefaultRepresentation(); |
| representation.setName("KMeans"); |
| representation.setFilterClass(ImageFilterKMeans.class); |
| representation.setMaximum(20); |
| representation.setMinimum(2); |
| representation.setValue(4); |
| representation.setDefaultValue(4); |
| representation.setPreviewValue(4); |
| representation.setTextId(R.string.kmeans); |
| representation.setButtonId(R.id.kmeansButton); |
| representation.setSupportsPartialRendering(true); |
| return representation; |
| } |
| |
| native protected void nativeApplyFilter(Bitmap bitmap, int width, int height, |
| Bitmap large_ds_bm, int lwidth, int lheight, Bitmap small_ds_bm, |
| int swidth, int sheight, int p, int seed); |
| |
| @Override |
| public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) { |
| if (getParameters() == null) { |
| return bitmap; |
| } |
| int w = bitmap.getWidth(); |
| int h = bitmap.getHeight(); |
| |
| Bitmap large_bm_ds = bitmap; |
| Bitmap small_bm_ds = bitmap; |
| |
| // find width/height for larger downsampled bitmap |
| int lw = w; |
| int lh = h; |
| while (lw > 256 && lh > 256) { |
| lw /= 2; |
| lh /= 2; |
| } |
| if (lw != w) { |
| large_bm_ds = Bitmap.createScaledBitmap(bitmap, lw, lh, true); |
| } |
| |
| // find width/height for smaller downsampled bitmap |
| int sw = lw; |
| int sh = lh; |
| while (sw > 64 && sh > 64) { |
| sw /= 2; |
| sh /= 2; |
| } |
| if (sw != lw) { |
| small_bm_ds = Bitmap.createScaledBitmap(large_bm_ds, sw, sh, true); |
| } |
| |
| if (getParameters() != null) { |
| int p = Math.max(getParameters().getValue(), getParameters().getMinimum()) % (getParameters().getMaximum() + 1); |
| nativeApplyFilter(bitmap, w, h, large_bm_ds, lw, lh, small_bm_ds, sw, sh, p, mSeed); |
| } |
| return bitmap; |
| } |
| } |