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ref: b699be1156cb41be910dadb3c8a6df0bea12bf67 parent: d85902512f9a5208b21a39ea7d861c236d701ca1 author: Jacob Moody <moody@posixcafe.org> date: Wed Aug 30 20:20:38 EDT 2023
sdl2: refactor image channel code, more palette function coverage