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3bca02e274
Add contrib/examples/.clang-format, tailored to fit the existing code as closely as possible. The end goal is to set up automatic formatting for the entire libpng source tree. We're doing this experiment in this subdirectory, for now. Also make refactoring changes, as follows: * Rewrite the preprocessor checks `#if PNG_FOO_SUPPORTED` to stop compilation immediately, with a descriptive `#error` about what needs to be supported. * Rewrite and reflow comments, add braces and brackets, and make other minor modifications that are suited for the clang-format'ed code.
External contributions to libpng -------------------------------- This "contrib" directory contains contributions which are not necessarily under the libpng license, although all are open source. They are not part of libpng proper and are not used for building the library, although some are used for testing the library via "make check".