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/*
* 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.dreams.phototable;
import android.content.ContentResolver;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
import java.util.Random;
/**
* Picks a random image from the local store.
*/
public class StockSource {
private static final String TAG = "PhotoTable.StockSource";
private static final boolean DEBUG = false;
private static final int[] PHOTOS = {R.drawable.photo_044_002,
R.drawable.photo_039_002,
R.drawable.photo_059_003,
R.drawable.photo_070_004,
R.drawable.photo_072_001,
R.drawable.photo_077_002,
R.drawable.photo_098_002,
R.drawable.photo_119_003,
R.drawable.photo_119_004,
R.drawable.photo_126_001,
R.drawable.photo_147_002,
R.drawable.photo_175_004
};
private static Random sRNG = new Random();
private final Context mContext;
private final Resources mResources;
public StockSource(Context context) {
mContext = context;
mResources = context.getResources();
}
public Bitmap next(BitmapFactory.Options options, int longSide, int shortSide) {
log("decoding a local resource to " + longSide + ", " + shortSide);
int photo = PHOTOS[Math.abs(sRNG.nextInt() % PHOTOS.length)];
options.inJustDecodeBounds = true;
options.inSampleSize = 1;
BitmapFactory.decodeResource(mResources, photo, options);
int rawLongSide = Math.max(options.outWidth, options.outHeight);
int rawShortSide = Math.max(options.outWidth, options.outHeight);
log("I see bounds of " + rawLongSide + ", " + rawShortSide);
float ratio = Math.min((float) longSide / (float) rawLongSide,
(float) shortSide / (float) rawShortSide);
while (ratio < 0.5) {
options.inSampleSize *= 2;
ratio *= 2;
}
log("decoding with inSampleSize " + options.inSampleSize);
options.inJustDecodeBounds = false;
Bitmap bitmap = BitmapFactory.decodeResource(mResources, photo, options);
rawLongSide = Math.max(options.outWidth, options.outHeight);
rawShortSide = Math.max(options.outWidth, options.outHeight);
ratio = Math.min((float) longSide / (float) rawLongSide,
(float) shortSide / (float) rawShortSide);
if (ratio < 1.0f) {
log("still too big, scaling down by " + ratio);
int photoWidth = (int) (ratio * options.outWidth);
int photoHeight = (int) (ratio * options.outHeight);
bitmap = Bitmap.createScaledBitmap(bitmap, photoWidth, photoHeight, true);
}
log("returning bitmap sized to " + bitmap.getWidth() + ", " + bitmap.getHeight());
return bitmap;
}
private static void log(String message) {
if (DEBUG) {
Log.i(TAG, message);
}
}
}
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