private InputStream prepareInputStream(final InputStream is) throws IOException {
InputStream src = new FlushedInputStream(is);
if (!src.markSupported()) {
src = manager.getBuffersPool().bufferize(src, IMAGES_BUFFER_SIZE);
}
return src;
}
void writeBitmapToDisk(final Bitmap bitmap) throws IOException {
EnhancedResponseCache cache = (EnhancedResponseCache) manager.getImagesResponseCache();
OutputStream output = new FileOutputStream(cache.getLocalPath(url));
output = manager.getBuffersPool().bufferize(output, IMAGES_BUFFER_SIZE);
try {
final int quality = 100;
bitmap.compress(Bitmap.CompressFormat.PNG, quality, output);
} finally {
IoUtils.closeQuietly(output);
}
}
/**
* @param is image input stream
* @return sampling factor
* @throws IOException if error happens
*/
private int resolveSampleFactor(final InputStream is, final BitmapFactory.Options options)
throws IOException {
if (!is.markSupported()) {
throw new IllegalStateException("Input stream does not support marks!");
}
options.inJustDecodeBounds = true;
int result = 1;
try {
MarkableInputStream markableStream = new MarkableInputStream(is); // Thanks to Square guys :)
long mark = markableStream.savePosition(BOUNDS_INFO_MARK);
doStreamDecode(markableStream, options);
result =
ImagesManager.calculateSampleFactor(
options.outWidth, options.outHeight, getRequiredWidth(), getRequiredHeight());
markableStream.reset(mark);
} finally {
options.inJustDecodeBounds = false;
}
return result;
}
/**
* Store image to the disk cache. If max allowed size is set image may be rescaled on disk.
*
* @throws IOException if error happens
*/
public void storeToDisk() throws IOException {
if (manager.isPresentOnDisk(url)) {
return;
}
if (!hasAllowedSize()) {
IoUtils.consumeStream(getRemoteInputStream(), manager.getBuffersPool());
return;
}
ImageResult result = decodeStream(getRemoteInputStream(), true);
if (result.getType() == ImageSourceType.NETWORK && result.getBitmap() != null) {
// image was scaled
writeBitmapToDisk(result.getBitmap());
}
}
/**
* @param manager images manager instance
* @param url image URL
* @param maxRelativeSize max allowed size of an image relatively to screen size, negative value
* means allowed size will be ignored
*/
ImageRequest(final ImagesManager manager, final String url, final float maxRelativeSize) {
this.manager = manager;
this.url = url;
if (maxRelativeSize < 0) {
maxAllowedWidth = -1;
maxAllowedHeight = -1;
} else {
DisplayMetrics metrics = manager.getContext().getResources().getDisplayMetrics();
maxAllowedWidth = (int) (metrics.widthPixels * maxRelativeSize);
maxAllowedHeight = (int) (metrics.heightPixels * maxRelativeSize);
}
}
private ImageResult decodeStream(final InputStream is, boolean onlyIfNeedsRescale)
throws IOException {
final BitmapFactory.Options options = createBitmapOptions();
final InputStream src = prepareInputStream(is);
try {
ImageResult result = new ImageResult();
result.setType(manager.isPresentOnDisk(url) ? ImageSourceType.DISK : ImageSourceType.NETWORK);
// get scale factor
options.inSampleSize = resolveSampleFactor(src, options);
if (options.inSampleSize > 1 || !onlyIfNeedsRescale) {
// actually decode
result.setBitmap(doStreamDecode(src, options));
} else {
// consume input in order to cache it
IoUtils.consumeStream(src, manager.getBuffersPool());
}
if (manager.debug) {
Log.d(TAG, "Image decoded: " + result);
}
return result;
} catch (final OutOfMemoryError e) {
// wrap OOM in IO
final IOException wrapped = new IOException("out of memory for " + getKey());
wrapped.initCause(e);
throw wrapped;
} finally {
recycle(options);
src.close();
}
}
URLConnection newUrlConnection() throws IOException {
UrlConnectionBuilderFactory builderFactory =
BeansManager.get(manager.getContext())
.getContainer()
.getBean(
ImagesManager.CONNECTION_BUILDER_FACTORY_NAME, UrlConnectionBuilderFactory.class);
return builderFactory
.newUrlConnectionBuilder()
.setUrl(url)
.setCacheManagerName(ImagesManager.CACHE_BEAN_NAME)
.create();
}
private void recycle(final BitmapFactory.Options options) {
manager.getBuffersPool().release(options.inTempStorage);
}
private BitmapFactory.Options createBitmapOptions() {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inTempStorage = manager.getBuffersPool().get(IMAGES_BUFFER_SIZE);
options.inPreferredConfig = format;
return options;
}