png_write_tRNS 3298 third_party/libpng/png.h PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, png_bytep trans, png_write_tRNS 167 third_party/libpng/pngwrite.c png_write_tRNS(png_ptr, info_ptr->trans, &(info_ptr->trans_values),