On certain linux, macOS environment, there is already a system getopt. This often creates conflict when compiling filament. Here we alias utils::getopt to either the system getopt (if present) or third_party/getopt. Fixes #7551
mipgen
mipgen generates mipmaps for an image down to the 1x1 level.
Usage
mipgen [options] <input_file> <output_pattern>
Run mipgen --help for more information about available options.