Implement a workaround for common OutOfMemoryError cases #69
Description
There have been increasing number of reports of `OutOfMemoryError`s occurring
when using Thumbnailator. (Issue 1)
In many cases, this is a result of trying to resize large input images, which
causes Thumbnailator to read the entire image to the JVM heap memory, resulting
in the `OutOfMemoryError`s due to the heap being filled up.
A permanent fix to the problem is better achieved by changing the Thumbnailator
architecture to not require loading the entire image to memory before resizing
the image, but this will require a comprehensive rewrite, which is planned for
a later release.
To address the `OutOfMemoryError` in a more timely manner, a temporary
workaround should be possible by examining the image metadata to find out the
image size, and accordingly apply a subsampling on the read operation to reduce
the amount of memory used when reading the image.
Original issue reported on code.google.com by coobird...@gmail.com on 4 May 2014 at 5:36