png

Eight PNG files with extreme shapes, including the biggest in the collection: png_30000x30000, a 900 megapixel image that is only 109 KB because it is one flat colour. Opened fully, it would need roughly 3.6 GB of memory as raw pixels. The set also has 1x1, 10000x1, 1x10000, 30000x1, 1x30000, 10000x100 and 100x10000. These test pixel-flood protection, where a small upload tries to exhaust a server. Check that your system reads the dimensions from the header and refuses oversized images before decoding them, and that it never tries to build a thumbnail of the 30000x30000 file.