Android Open Source - fireflies_android Bitmap Utils

From Project

License

The source code is released under:

MIT License

If you think the Android project fireflies_android listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

package donothingbox.game.utils;
/*www .  jav a2 s.  c  o m*/
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

/*
 *  Static bitmap functions with no var dependences go here
 * 
 */

public class BitmapUtils {

  public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
      // Raw height and width of image
      final int height = options.outHeight;
      final int width = options.outWidth;
      int inSampleSize = 1;
  
      if (height > reqHeight || width > reqWidth) {
  
          final int halfHeight = height / 2;
          final int halfWidth = width / 2;
          // Calculate the largest inSampleSize value that is a power of 2 and keeps both
          // height and width larger than the requested height and width.
          while ((halfHeight / inSampleSize) > reqHeight
                  && (halfWidth / inSampleSize) > reqWidth) {
              inSampleSize *= 2;
          }
      }
      return inSampleSize;
  }

  public static Bitmap decodeSampledBitmapFromResource(Resources res, int resId, int reqWidth, int reqHeight) {
      // First decode with inJustDecodeBounds=true to check dimensions
      final BitmapFactory.Options options = new BitmapFactory.Options();
      options.inJustDecodeBounds = true;
      BitmapFactory.decodeResource(res, resId, options);
      // Calculate inSampleSize
      options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
      // Decode bitmap with inSampleSize set
      options.inJustDecodeBounds = false;
      return BitmapFactory.decodeResource(res, resId, options);
  }

}

Java Source Code List