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package de.danoeh.antennapod.util;
import java.io.InputStream;
import org.apache.commons.io.IOUtils;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Rect;
import android.util.Log;
import de.danoeh.antennapod.AppConfig;
import de.danoeh.antennapod.asynctask.ImageLoader;
public class BitmapDecoder {
private static final String TAG = "BitmapDecoder";
private static int calculateSampleSize(int preferredLength, int length) {
int sampleSize = 1;
if (length > preferredLength) {
sampleSize = Math.round(((float) length / (float) preferredLength));
}
return sampleSize;
}
public static Bitmap decodeBitmapFromWorkerTaskResource(int preferredLength,
ImageLoader.ImageWorkerTaskResource source) {
InputStream input = source.openImageInputStream();
if (input != null) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(input, new Rect(), options);
int srcWidth = options.outWidth;
int srcHeight = options.outHeight;
int length = Math.max(srcWidth, srcHeight);
int sampleSize = calculateSampleSize(preferredLength, length);
if (AppConfig.DEBUG)
Log.d(TAG, "Using samplesize " + sampleSize);
options.inJustDecodeBounds = false;
options.inSampleSize = sampleSize;
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap decodedBitmap = BitmapFactory.decodeStream(source.reopenImageInputStream(input),
null, options);
if (decodedBitmap == null) {
decodedBitmap = BitmapFactory.decodeStream(source.reopenImageInputStream(input));
}
IOUtils.closeQuietly(input);
return decodedBitmap;
}
return null;
}
}
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