Merge "Prefer upsizing a down-sampled picture if size is close enough" into jb-mr1-dev

        if (targetExtent < 1) return 1;

        if (originalSmallerExtent < 1) return 1;

        // test what the best sample size is

        // Test what the best sample size is. To do that, we find the sample size that gives us

        // the best trade-off between resulting image size and memory requirement. We allow

        // the down-sampled image to be 20% smaller than the target size. That way we can get around

        // unfortunate cases where e.g. a 720 picture is requested for 362 and not down-sampled at

        // all. Why 20%? Why not. Prove me wrong.

        int extent = originalSmallerExtent;

        int sampleSize = 1;

        while ((extent >> 1) >= targetExtent) {

        while ((extent >> 1) >= targetExtent * 0.8f) {

            sampleSize <<= 1;

            extent >>= 1;

        }