PNG_WRITE_EMPTY_PLTE_SUPPORTED 1473 third_party/libpng/png.h     defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
PNG_WRITE_EMPTY_PLTE_SUPPORTED 1816 third_party/libpng/png.h     defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
PNG_WRITE_EMPTY_PLTE_SUPPORTED 1036 third_party/libpng/pngset.c     defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)