parse_png.c File Reference

(v16)

PNG metadata parser implementation. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <mpfr.h>
#include "parse.h"
#include "parse_png.h"
#include "logging.h"
#include "utility.h"
#include "crc.h"

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Macros
#define	INT   ((s[0] << 24) | (s[1] << 16) | (s[2] << 8) | (s[3])); s+= 4

Functions
bool	parse_png (const char *source, int length, mpfr_t cx, mpfr_t cy, mpfr_t cz)
	Parse the original mightymandel .png metadata file format.

Detailed Description

PNG metadata parser implementation.

Definition in file parse_png.c.

Macro Definition Documentation

#define INT   ((s[0] << 24) | (s[1] << 16) | (s[2] << 8) | (s[3])); s+= 4

Referenced by parse_png(), and png_iTXt().

Function Documentation

bool parse_png	(	const char *	source,
		int	length,
		mpfr_t	cx,
		mpfr_t	cy,
		mpfr_t	cz
	)

Parse the original mightymandel .png metadata file format.

PNG has tEXt chunks with keyword Software set tomightymandelandTitle set to the view coordinates (in the same format asparse_ppm()`).

Parameters

source	A null-terminated input file already loaded into memory.
length	Length of the input file (without the extra null terminator).
cx	For output of the real part of the view center. It is already mpfr_init2()'d.
cy	For output of the imaginary part of the view center. It is already mpfr_init2()'d.
cz	For output of the view radius. It is already mpfr_init2()'d.

Returns

Success (true) or failure (false).

Definition at line 21 of file parse_png.c.

References crc(), debug_message, INT, log_message, LOG_WARN, precision_for_radius(), and radius_is_valid().

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