Java Code Examples for com.facebook.imagepipeline.request.ImageRequest#getResizeOptions()

private static int getScaleNumerator(
    final ImageRequest imageRequest,
    final ImageTransformMetaData metaData) {
  final ResizeOptions resizeOptions = imageRequest.getResizeOptions();
  if (resizeOptions == null) {
    return JpegTranscoder.SCALE_DENOMINATOR;
  }

  final int rotationAngle = getRotationAngle(imageRequest, metaData);
  final boolean swapDimensions = rotationAngle == 90 || rotationAngle == 270;
  final int widthAfterRotation = swapDimensions ? metaData.getHeight() : metaData.getWidth();
  final int heightAfterRotation = swapDimensions ? metaData.getWidth() : metaData.getHeight();

  final float widthRatio = ((float) resizeOptions.width) / widthAfterRotation;
  final float heightRatio = ((float) resizeOptions.height) / heightAfterRotation;
  final int numerator =
      (int) Math.ceil(Math.max(widthRatio, heightRatio) * JpegTranscoder.SCALE_DENOMINATOR);

  if (numerator > MAX_JPEG_SCALE_NUMERATOR) {
    return JpegTranscoder.SCALE_DENOMINATOR;
  }
  if (numerator < 1) {
    return 1;
  }
  return numerator;
}
 

@Override
public CacheKey getPostprocessedBitmapCacheKey(
    ImageRequest request, @Nullable Object callerContext) {
  final Postprocessor postprocessor = request.getPostprocessor();
  final CacheKey postprocessorCacheKey;
  final String postprocessorName;
  if (postprocessor != null) {
    postprocessorCacheKey = postprocessor.getPostprocessorCacheKey();
    postprocessorName = postprocessor.getClass().getName();
  } else {
    postprocessorCacheKey = null;
    postprocessorName = null;
  }
  return new BitmapMemoryCacheKey(
      getCacheKeySourceUri(request.getSourceUri()).toString(),
      request.getResizeOptions(),
      request.getRotationOptions(),
      request.getImageDecodeOptions(),
      postprocessorCacheKey,
      postprocessorName,
      callerContext);
}
 

@Override
public BitmapMemoryCacheKey getBitmapCacheKey(ImageRequest request) {
  return new BitmapMemoryCacheKey(
      getCacheKeySourceUri(request.getSourceUri()).toString(),
      request.getResizeOptions(),
      request.getAutoRotateEnabled(),
      request.getImageDecodeOptions());
}
 

@Override
public CacheKey getBitmapCacheKey(ImageRequest request, @Nullable Object callerContext) {
  return new BitmapMemoryCacheKey(
      getCacheKeySourceUri(request.getSourceUri()).toString(),
      request.getResizeOptions(),
      request.getRotationOptions(),
      request.getImageDecodeOptions(),
      null,
      null,
      callerContext);
}
 

/**
 * Submits a request for execution and returns a DataSource representing the pending encoded
 * image(s).
 *
 * <p>The ResizeOptions in the imageRequest will be ignored for this fetch
 *
 * <p>The returned DataSource must be closed once the client has finished with it.
 *
 * @param imageRequest the request to submit
 * @return a DataSource representing the pending encoded image(s)
 */
public DataSource<CloseableReference<PooledByteBuffer>> fetchEncodedImage(
    ImageRequest imageRequest, Object callerContext, @Nullable RequestListener requestListener) {
  Preconditions.checkNotNull(imageRequest.getSourceUri());
  try {
    Producer<CloseableReference<PooledByteBuffer>> producerSequence =
        mProducerSequenceFactory.getEncodedImageProducerSequence(imageRequest);
    // The resize options are used to determine whether images are going to be downsampled during
    // decode or not. For the case where the image has to be downsampled and it's a local image it
    // will be kept as a FileInputStream until decoding instead of reading it in memory. Since
    // this method returns an encoded image, it should always be read into memory. Therefore, the
    // resize options are ignored to avoid treating the image as if it was to be downsampled
    // during decode.
    if (imageRequest.getResizeOptions() != null) {
      imageRequest = ImageRequestBuilder.fromRequest(imageRequest).setResizeOptions(null).build();
    }
    return submitFetchRequest(
        producerSequence,
        imageRequest,
        ImageRequest.RequestLevel.FULL_FETCH,
        callerContext,
        requestListener,
        null);
  } catch (Exception exception) {
    return DataSources.immediateFailedDataSource(exception);
  }
}