A command line tool for decoding and processing Apple's Metal Library files metallib.
mtl-info is distributed with cargo. If Rust and Cargo are installed then follow the commands below to get it installed on your system.
cargo install mtl-info
# Check build output. If $PATH is setup correctly you can now run
mtl-info --helpAn Apple Metal Library is a binary file format containing compiled Metal shaders. Many applications will include multiple such shaders which are all saved in the same Library file (usually called default.metallib). mtl-info helps parse and decode these files.
Each file begins with a CC char code to designate the file to macOS. The specific code is MTLB.
After that are a set of headers describing each shader within the file including it’s name and where it’s binary code exists within the library file.
Following that is the binary code data which is LLVM bitcode which can be converted using llvm-dis into a more human readable format.
For listing the names of every Metal fragment or vertex shader in the Metal library.
mtl-info ./default.metallib listMetal library files contain LLVM bitcode which can be disassembled into a more human-readable assembly format.
# Find entry by name
mtl-info ./default.metallib bitcode --with-name outlineRetina_frag
# Find entry by index
mtl-info ./default.metallib bitcode --with-index 3