png_write_tRNS    869 3rdparty/libpng/pngpriv.h PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr,
png_write_tRNS    156 3rdparty/libpng/pngwrite.c       png_write_tRNS(png_ptr, info_ptr->trans_alpha, &(info_ptr->trans_color),