openslide/openslide — pull request #90 by bgilbert (2012-02-21 01:31:16+00:00)
Title: MIRAX: Support downsampled slides

The Pannoramic viewer can save downsampled slides. Their metadata is almost identical to the original slide: some levels are omitted, the new level 0 has a non-zero `IMAGE_CONCAT_FACTOR`, and all position coordinates are divided by the downsample factor. Support these slides.