Name: libpng
URL: http://libpng.org/
Version: 1.6.37
Security Critical: yes
License: libpng license
License Android Compatible: yes

Description:
Updated to 1.6.37, stripped all unneeded files.

- Use custom configuration file pnglibconf.h, which turns off all features that
  are not in use.
- Use custom prefix file pngprefix.h, which avoids namespace conflicts with
  pdfium's copy of libpng.
- Configures custom png chunk user limits (crbug.com/117369) in pnglibconf.h.
- Applies the patch in patches/0001-chunkerror.patch (modify
  png_check_chunk_length to call png_benign_error instead of png_chunk_error --
  see crbug.com/827754).
- Keeps the fuzz target in contrib/oss-fuzz/ for running on clusterfuzz.
- Applies the patch in patches/0002-fuzzeroom.patch to prevent clusterfuzz
  running into OOM errors.
- Applies the patch from https://github.com/glennrp/libpng/pull/285 to keep
  clang-cl build working.