1Any Android specific modifications to upstream libpng (1.6.25) should
2be listed here:
3
4(1) Android has added the following files.
5    pngusr.h
6    Android.mk
7    CleanSpec.mk
8    MODULE_LICENSE_BSD_LIKE
9    README.version
10
11(2) pnglibconf.h
12    This is copied from scripts/pnglibconf.h.prebuilt.
13    Android has undefined PNG_WARNINGS_SUPPORTED.
14
15(3) Removed contrib/testpngs/
16    There is no reason to check in all of these files if we won't
17    be using them.
18
19(4) Applied the Intel SSE patch
20    Upstream places the patch for SSE support
21    in contrib/intel/intel_sse.patch.
22    The patch was applied using the following command:
23    'patch -i contrib/intel/intel_sse.patch -p1'
24