package com.bumptech.glide.load.resource.bitmap;

import android.graphics.Bitmap;
import android.support.annotation.NonNull;
import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import java.security.MessageDigest;

/**
 * Returns the image with its original size if its dimensions match or are smaller
 * than the target's, couple with {@link android.widget.ImageView.ScaleType#CENTER_INSIDE}
 * in order to center it in Target. If not, then it is scaled so that one of the dimensions of
 * the image will be equal to the given dimension and the other will be less than the given
 * dimension (maintaining the image's aspect ratio).
 */
public class CenterInside extends BitmapTransformation {
  private static final String ID = "com.bumptech.glide.load.resource.bitmap.CenterInside";
  private static final byte[] ID_BYTES = ID.getBytes(CHARSET);

  @Override
  protected Bitmap transform(
      @NonNull BitmapPool pool, @NonNull Bitmap toTransform, int outWidth, int outHeight) {
    return TransformationUtils.centerInside(pool, toTransform, outWidth, outHeight);
  }

  @Override
  public boolean equals(Object o) {
    return o instanceof CenterInside;
  }

  @Override
  public int hashCode() {
    return ID.hashCode();
  }

  @Override
  public void updateDiskCacheKey(@NonNull MessageDigest messageDigest) {
    messageDigest.update(ID_BYTES);
  }
}


