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package cgeo.geocaching.utils;
import cgeo.geocaching.cgeoapplication;
import cgeo.geocaching.compatibility.Compatibility;
import android.graphics.Bitmap;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
public class ImageHelper {
// Do not let this class be instantiated, this is a utility class.
private ImageHelper() {
}
/**
* Scales a bitmap to the given bounds
*
* @param image
* The bitmap to scale
* @return BitmapDrawable The scaled image
*/
public static BitmapDrawable scaleBitmapToFitDisplay(final Bitmap image) {
Point displaySize = Compatibility.getDisplaySize();
final int maxWidth = displaySize.x - 25;
final int maxHeight = displaySize.y - 25;
return scaleBitmapTo(image, maxWidth, maxHeight);
}
/**
* Scales a bitmap to the given bounds if it is larger, otherwise returns the original bitmap.
*
* @param image
* The bitmap to scale
* @return BitmapDrawable The scaled image
*/
public static BitmapDrawable scaleBitmapTo(final Bitmap image, final int maxWidth, final int maxHeight) {
final cgeoapplication app = cgeoapplication.getInstance();
Bitmap result = image;
int width = image.getWidth();
int height = image.getHeight();
if (width > maxWidth || height > maxHeight) {
final double ratio = Math.min((double) maxHeight / (double) height, (double) maxWidth / (double) width);
width = (int) Math.ceil(width * ratio);
height = (int) Math.ceil(height * ratio);
result = Bitmap.createScaledBitmap(image, width, height, true);
}
final BitmapDrawable resultDrawable = new BitmapDrawable(app.getResources(), result);
resultDrawable.setBounds(new Rect(0, 0, width, height));
return resultDrawable;
}
/**
* Store a bitmap to file.
*
* @param bitmap
* The bitmap to store
* @param format
* The image format
* @param quality
* The image quality
* @param pathOfOutputImage
* Path to store to
*/
public static void storeBitmap(final Bitmap bitmap, final Bitmap.CompressFormat format, final int quality, final String pathOfOutputImage) {
try {
FileOutputStream out = new FileOutputStream(pathOfOutputImage);
BufferedOutputStream bos = new BufferedOutputStream(out);
bitmap.compress(format, quality, bos);
bos.flush();
bos.close();
} catch (Exception e) {
Log.e("ImageHelper.storeBitmap", e);
}
}
}
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