com.bumptech.glide.load.resource.bitmap.UnitBitmapDecoder Maven / Gradle / Ivy

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A fast and efficient image loading library for Android focused on smooth scrolling.

There is a newer version: 5.0.0-rc01

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

import android.graphics.Bitmap;
import com.bumptech.glide.load.Options;
import com.bumptech.glide.load.ResourceDecoder;
import com.bumptech.glide.load.engine.Resource;
import com.bumptech.glide.util.Util;
import java.io.IOException;

/**
 * Passes through a (hopefully) non-owned {@link Bitmap} as a {@link Bitmap} based {@link Resource}
 * so that the given {@link Bitmap} is not recycled.
 */
public final class UnitBitmapDecoder implements ResourceDecoder {

  @Override
  public boolean handles(Bitmap source, Options options) throws IOException {
    return true;
  }

  @Override
  public Resource decode(Bitmap source, int width, int height, Options options)
      throws IOException {
    return new NonOwnedBitmapResource(source);
  }

  private static final class NonOwnedBitmapResource implements Resource {

    private final Bitmap bitmap;

    NonOwnedBitmapResource(Bitmap bitmap) {
      this.bitmap = bitmap;
    }

    @Override
    public Class getResourceClass() {
      return Bitmap.class;
    }

    @Override
    public Bitmap get() {
      return bitmap;
    }

    @Override
    public int getSize() {
      return Util.getBitmapByteSize(bitmap);
    }

    @Override
    public void recycle() {
      // Do nothing.
    }
  }
}