png_set_tRNS     2307 3rdparty/libpng/png.h PNG_EXPORT(167, void, png_set_tRNS,
png_set_tRNS     1655 3rdparty/libpng/pngrutil.c    png_set_tRNS(png_ptr, info_ptr, readbuf, png_ptr->num_trans,