| URL: http://www.libpng.org/pub/png/libpng.html |
| Version: 1.6.16 |
| License: libpng license |
| License File: LICENSE, pulled out of png.h |
| Description: png compression/decompression library |
| Local Modifications: |
| (1) Created pnglibconf.h from pnglibconf.h.prebuilt (a |
| rename with a few additional settings enabled). |
| (2) Copied LICENSE into this directory. (Originally it |
| was pulled from png.h, but libpng has now provided a |
| separate LICENSE file for convenience, which we use |
| directly.) |
| (3) Included Intel optimizations by running: |
| "patch -i contrib/intel/intel_sse.patch -p1" |
| |
| FAQ: |
| Q: Why does this directory exist? |
| A: libpng is pulled in through DEPS, but in order to build it using ninja, we |
| need to create pnglibconf.h. We originally tried creating |
| the file as an action in https://codereview.chromium.org/930283002/, but this |
| apparently led to a race condition on Windows, where some builds failed to |
| create the file in time for other files to include it. By checking these |
| files directly into Skia, we eliminate the race condition. |