384 struct display  struct
386    jmp_buf          error_return;      /* Where to go to on error */
387    unsigned int     errset;            /* error_return is set */
388    int              errlevel;          /* error level from longjmp */
390    const char      *operation;         /* What is happening */
391    const char      *filename;          /* The name of the original file */
392    const char      *output_file;       /* The name of the output file */
395    FILE            *fp;
400    png_alloc_size_t read_size;
401    png_structp      read_pp;
402    png_infop        ip;
404       png_textp     text_ptr; /* stash of text chunks */
405       int           num_text;
406       int           text_stashed;
433    png_uint_32      options;             /* See display_log below */  argument
434    png_byte         entry[option_count]; /* The selected entry+1 of an option
437    int              value[option_count]; /* Corresponding value */
443    unsigned int     csp;               /* next stack entry to use */
444    unsigned int     nsp;               /* highest active entry+1 found so far */
449    unsigned int     tsp;               /* nsp from the last run; this is the
476 display_init(struct display *dp)  in display_init()  argument