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package de.danoeh.antennapod.util;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
public class BitmapDecoder {
private static final String TAG = "BitmapDecoder";
private static int calculateSampleSize(int preferredLength, int width,
int height) {
int max = Math.max(width, height);
if (max < preferredLength) {
return 1;
} else {
// find first sample size where max / sampleSize <
// PREFERRED_LENGTH
for (int sampleSize = 1, power = 0;; power++, sampleSize = (int) Math
.pow(2, power)) {
int newLength = max / sampleSize;
if (newLength <= preferredLength) {
if (newLength > 0) {
return sampleSize;
} else {
return sampleSize - 1;
}
}
}
}
}
public static Bitmap decodeBitmap(int preferredLength, String fileUrl) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(fileUrl, options);
int srcWidth = options.outWidth;
int srcHeight = options.outHeight;
int sampleSize = calculateSampleSize(preferredLength, srcWidth,
srcHeight);
options.inJustDecodeBounds = false;
options.inSampleSize = sampleSize;
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
options.inScaled = false;
Bitmap decodedBitmap = BitmapFactory.decodeFile(fileUrl, options);
if (decodedBitmap == null) {
Log.i(TAG,
"Bitmap could not be decoded in custom sample size. Trying default sample size (path was "
+ fileUrl + ")");
decodedBitmap = BitmapFactory.decodeFile(fileUrl);
}
if (decodedBitmap != null) {
return decodedBitmap;
/*
return Bitmap.createScaledBitmap(decodedBitmap,
preferredLength, preferredLength, false);
*/
} else {
return null;
}
}
}
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