private <T> DataSource<CloseableReference<T>> submitFetchRequest(
Producer<CloseableReference<T>> producerSequence,
ImageRequest imageRequest,
ImageRequest.RequestLevel lowestPermittedRequestLevelOnSubmit,
Object callerContext) {
try {
ImageRequest.RequestLevel lowestPermittedRequestLevel =
ImageRequest.RequestLevel.getMax(
imageRequest.getLowestPermittedRequestLevel(), lowestPermittedRequestLevelOnSubmit);
SettableProducerContext settableProducerContext =
new SettableProducerContext(
imageRequest,
generateUniqueFutureId(),
mRequestListener,
callerContext,
lowestPermittedRequestLevel,
/* isPrefetch */ false,
imageRequest.getProgressiveRenderingEnabled()
|| !UriUtil.isNetworkUri(imageRequest.getSourceUri()),
imageRequest.getPriority());
return CloseableProducerToDataSourceAdapter.create(
producerSequence, settableProducerContext, mRequestListener);
} catch (Exception exception) {
return DataSources.immediateFailedDataSource(exception);
}
}
@Override
public void produceResults(
final Consumer<CloseableReference<CloseableImage>> consumer, final ProducerContext context) {
final ImageRequest imageRequest = context.getImageRequest();
ProgressiveDecoder progressiveDecoder;
if (!UriUtil.isNetworkUri(imageRequest.getSourceUri())) {
progressiveDecoder = new LocalImagesProgressiveDecoder(consumer, context);
} else {
ProgressiveJpegParser jpegParser = new ProgressiveJpegParser(mByteArrayPool);
progressiveDecoder =
new NetworkImagesProgressiveDecoder(
consumer, context, jpegParser, mProgressiveJpegConfig);
}
mNextProducer.produceResults(progressiveDecoder, context);
}
private static boolean shouldResize(@Nullable Uri uri) {
// Resizing is inferior to scaling. See http://frescolib.org/docs/resizing-rotating.html#_
// We resize here only for images likely to be from the device's camera, where the app developer
// has no control over the original size
return uri != null && (UriUtil.isLocalContentUri(uri) || UriUtil.isLocalFileUri(uri));
}